Tag Archives: gear box castings

investment casting France casting the working principle and design of the washing machine

Posted on March 22, 2012 by admin

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A washing machine works
At present, for the different needs of various industries, the washing machine is divided into the following categories:
(1) ultrasonic cleaning;
(2) high-pressure water column cleaning;
(3) Vibration cleaning;
(4) organic solvent cleaning;
(5) chemicals corrosive cleaning.
The ultrasonic cleaning is the main choice of the small size, the efficient cleaning of the large number of items, its technology is mature, the effect is obvious. The high-pressure jet of water cleaning is suitable for the cleaning of the building, etc., large-scale and large-scale objects, for its large water consumption, many scholars have done a lot of different occasions, the liquid control study. Vibration cleaning in the early parts cleaning, food, cleaning and so on many occasions to use more. While the cleaning of organic solvents and chemicals used only in exceptional circumstances. Therefore, the transformation of the casting the shelling class production line, the use of ultrasonic cleaning device is most appropriate.
The ultrasound is a density of vibration of the mechanical wave, with high energy. Cavitation phenomenon in a certain frequency range of ultrasonic input to the liquid surface. The so-called cavitation, the ultrasonic vibration liquid density, tear liquid, a hole-like bubble, a negative pressure or vacuum, a large number of bubbles in the process of generation and closed with great force. This phenomenon is called cavitation.
In general, the lower the ultrasonic frequency, the greater the resulting air gap, the cavitation effect is more obvious, more suitable for washing the surface roughness of the object. The high frequency ultrasonic bubble more suitable for washing a smooth surface and cavity of the object. Therefore, the equipment selection of a higher frequency of ultrasonic equipment.
The selection and arrangement of the two ultrasonic devices
2.1 The ultrasonic device
At present, there is a general ultrasonic cleaning machine for some of the more than parts, such as oil fixtures, medical equipment. Cleaning washing machine usually will be a lot of artifacts scattered on the cabinets, on the grid, the intensity of investment casting foundry shell, these devices are difficult to play the effect. In order to achieve the energy of the shell broken, the ultrasonic wave superposition method to improve the strength in a small area at the same time in other parts of the energy-dispersive. This washing machine is casting strength than the strength of the shell, shell in the strong cavitation destruction of the casting remains intact, to work, thus requiring the energy scattered in a certain range. Itself, the vertical conduction properties in the lower frequency ultrasound is not high frequency band is good, prone to divergent phenomena, signal devices and transducer frequency can not be too low.
2.2 Panel
The washing machine ultrasonic array panel design and layout into a globular structure shown in Figure 2 in order to converge the ultrasonic energy. Meanwhile, the point of convergence between the various panels in the center of the chassis on the sphere is 2/3 of the workpiece diameter in order to facilitate ultrasound uniform role in the workpiece. In general, investment casting and more production of some small parts, the overall diameter is generally no more than 320mm spherical ultrasonic aggregation of this equipment in a diameter of 200mm the center of the sphere. Shown in Figure 3, when the focus of convergence in spherical divergence, the entire workpiece can be more evenly absorbed energy.
3 shaft design
Order to make the case containing the parts of the cavity structure can be completely divisible, while clamping the workpiece to rotate in order to eliminate the dead point. Rotary mechanism with underwater motor problems in ultrasonic repeatedly under, should not be used. Therefore, the briquetting and ring to match the seal is more reasonable. Because the shell is broken, will produce a lot of small hard particles, the fixed ring seals and more softer material such as graphite, the role of ultrasound fixed circle of hard particles will cause damage. The same time, the shelling casting of the workpiece are generally mass production, the workpiece clamping efficiency is also very important. These spindle installed on the side of more appropriate. Box filled with liquid, ease of operation of the installation and unloading of the workpiece in the side quickly and more easily achieved. Using the channel as a washing machine jig and hinge supports, arranged in the side panel of the washing machine. The seal structure of the mechanical design commonly used in stainless steel and graphite pressure seal. In order to prevent the workpiece off the shell in the cleaning process in the ultrasonic wave cutting action seals, plus baffle to protect them. In order to prevent the washing machine during the operation of spindle axial movement of the spindle bearings swim solid way layout, in order to determine the position of the spindle. Spindle up and down the side in the form of the tongue and groove with the other components connected to the top with the workpiece fixture connection, fixture design and selection is usually based on a different artifact types. The bottom of the low-speed low-power reducer connected. Speed ??design 10r/min power of 100W. Low speed has been a lot of torque, enough to ensure that the spindle work.
The overall structure of the design
The strongest point of the ultrasonic cavitation in the water when the water temperature below 20 ° C. Will appear again in water heated to 20 ~ 40 ℃, high-intensity cavitation. Therefore, the washing machine needs to be heated on the water, in order to guarantee the efficiency of the machine. In addition, the water bubbles (cavitation) at work will also seriously affect the cavitation rate, so the washing machine to add the degassing device. Heating and degassing device outside the chassis.
Ultrasonic heating device and temperature sensing elements are generally on the cleaning of the chassis body, the device due to higher internal ultrasound intensity, install it to the cabinet will be a security risk, so install it to the circulatory system. The heating device with a ceramic shell of electric wire heating in the submersible pump relay control circuit is turned on, the heating device will not work. Degassing device is the most widely used in papermaking and metallurgical technology, the principle of a variety. Sewage treatment, the production of concrete forming construction projects are very common, the use of the degassing device. Therefore, there is no need for specialized degassing device design. The device chosen line vacuum degasser. The layout of the online degasser is usually installed in the input or output of the output of the pump. In order to ensure safe and reliable dewatering system design in the output portion of the submersible pump. This equipment using the Shanghai Shi Donggong Secretary for SD-TI vacuum degasser its maximum pressure of 0.6MPa, the motor power of 1.2kW, enough to meet the work requirements of the machine. Degassing device does not require a long time after the machine starts to run, in parallel with the heating device.
In the boot, first turn off the heating device of the valve and power supply, the water in the entire device after degassed and start working. At this point, turn off the valves and the power of the degassing device, open the valve and power of the heating device and heating device power control for intermittent. Among them, intermittent, and the opening time determined by the feedback voltage of the thermistor.
Ultrasonic panel, made up of spherical higher cost. This design will be made each small piece of panel is then fixed on the stent.
In order to make the ultrasonic convergence, each transducer using different angles of pairs of pads, according to a certain point of view of ultrasonic dispersion gather. The design of the selected ultrasonic transducer for full electronic equipment and columnar with spiral buckle-type transducer. Output power of 50W, diameter 45mm each piece of ultrasonic plate is composed of nine transducer, a power of 450W. Machine consists of seven ultrasonic panel, the total power is 3150W. Ultrasound in order to reduce the impact on operators, washing machine in the actual run-time method using ultrasonic impact on the casting cleaning. Appropriate protective equipment should be installed around the equipment to ensure normal production run.
5 Conclusion
Traditional industrial cleaning methods for the complex shape of the melting mold casting, the shelling process is cumbersome, difficult to effectively remove the shell, amounting to less than a high cleanliness cleaning requirements. Investment casting ultrasonic cleaning machine design applications, the use of high intensity ultrasound cavitation can effectively remove the shell and into the next process it efficiently, and in the case of workholding can more efficiently to clean up the shell.
Should adopt a different fixture and therefore different parts so that it is versatile, can better meet the industrial scale cleaning.

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On the titanium forging forging process

Posted on February 2, 2012 by admin

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dozer wear parts – China Manufacturer

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Forging is usually used to make shape and size close to finished, and then only for the final heat treatment and cutting rough. Forging temperature and deformation degree is to determine the alloy, the performance of the underlying factors. Heat treatment of titanium alloys with different heat treatment of steel, the alloy can not afford a decisive role. Thus, titanium forging the final process step of the process specification has a particularly important role.

To make titanium forgings can also obtain a higher strength and ductility, the overall deformation of the blank must be made not less than 30% of the amount of deformation temperature does not exceed the phase transition temperature, and should strive to temperature and deformation degree of deformation in the rough in the best may be distributed evenly.

And properties of titanium alloy forging steel forgings is less than uniform. Flow area in the metal heated by recrystallization heat treatment, the low times of fuzzy grain, high-powered for the equiaxed fine grain; in the deformation zone is difficult, due to deformation is small or no deformation, organizations tend to retain its pre-deformed state. Therefore, some important titanium forging parts (such as compressor disk, leaves, etc.), in addition to control the deformation temperature TB below and the appropriate degree of deformation, the control of the original rough organization is very important, otherwise, the coarse grain structure or certain genetic defects in the forgings, and subsequent heat treatment and can not be eliminated, will result in forging scrap.

Hammer forging titanium alloy forgings of complex shape, the local concentration of the thermal effects of the rapid deformation of the region, even if the strict control of the heating temperature, the temperature of the metal alloy may still exceed the TB. For example, forging cross-section for the rough-shaped titanium alloy, the hammer is too heavy, middle (web area) of the thermal effect due to deformation of the temperature effect than the edge part of the height of about 100 ℃. In addition, the difficult deformation zone and the region with a critical degree of deformation in the forging process after the heating and durable plastic is easy to form a lower intensity than the coarse grain structure. Therefore, the complex shape forging hammer forging, the mechanical properties are often very unstable.

Although the heating temperature is lower forging can eliminate the risk of overheating resulting rough, but will lead to sharp increase in deformation resistance, increased tool wear and power consumption must also use a more powerful equipment.

Hammer forging, the use of multiple methods can reduce the light hit the rough local overheating. However, it is necessary to increase the fire heating times, rough and cold to compensate for the loss of heat from the mold exposure.

Forging a relatively simple shape forgings and metal on plastic deformation and rupture strength index requirements not too high, to the use of forging better. But should not be used β alloy forging, die forging process due to repeated heating will adversely affect the mechanical properties. Compared with the hammer, press (hydraulic press, etc.) greatly reduced the pace of work, the alloy can reduce the heat deformation resistance and deformation effects. In the hydraulic press forging titanium, rough forging unit of hammer forging force than about 30%, which can increase the life of the mold. Also reduces the thermal effects of lower temperature than the metal overheating and the risk of TB.

When using press forging, and hammer in the forging unit pressure under the same conditions, the heating temperature can be reduced rough 50 ~ 100 ℃. Thus, the metal is heated and the cycle of interaction between the gas and the temperature difference between the blank and die accordingly reduced, thereby improving the uniformity of deformation, forging the organization has greatly improved the uniformity, consistency also will improve the mechanical properties . Reduce the deformation rate, the most significant value growth is surface shrinkage, surface shrinkage of tissue defects caused by overheating of the most sensitive.

Deformation characteristics of titanium alloy harder than steel mold into the deep and narrow slot. This is because the high deformation resistance of titanium, and tools as well as rough friction contact surface of the larger cooling too fast. To improve the mobility of titanium and improve die life. The usual practice is to increase the slope and corner radius forging and using lubricants: forging die edges on the bridge than the height of the Ministry of Steel, as big as about 2mm.

To make easy full-groove, and sometimes size can be used to bridge the Ministry of the flash tank to non-uniform speed limit or a certain part of groove metal to flow. For example, a rectangular box-shaped forging (see Figure 12), before and after the wall is thin; so thick wall. When the box-shaped pieces as shown Surrounded by BB flash slot, due to the metal flow around the wall of resistance, resulting in thinner metal to flow around the wall hard, filling dissatisfaction. Later, still in use around the wall as shown in BB flash slot, as shown in the left and right sidewalls use AA flash slot, the Ministry of size as the bridge width, combined with damping trench barriers, making the thin wall before and after fully charged, and the metal more ways to save using the above flash slot.

Improve the mobility of titanium to reduce the deformation resistance is one of the most effective way to improve the mold preheating temperature. Nearly three decades at home and abroad since developed isothermal forging, hot forging die, to solve large complex forming of titanium alloy precision forgings provides a feasible method. This method has been widely used titanium alloy forgings.

When using the method of forging titanium alloy closed die forging, due to pressure and reduces the life of the mold. Therefore, closed die forging blanks must be strictly limited to the original volume, which makes the preparation process complicated. Whether to adopt the closed die forging, the cost and feasibility of the process from two considerations. Open die forging, the edges rough weight loss accounted for 15% to 20%, holding part of the process of waste (by forging conditions must be left if this part) accounted for 10% of rough weight. Flash is usually with the loss of metal relative to the weight reduction and increased rough, some of the structural asymmetry, poor cross-sectional area and the presence of difficult to fill the larger part of the forging, flash can consume up to 50%. Although there is no loss of closed die forging flash, but the system blank, complex process, need to add more transition with a groove, it will undoubtedly increase the ancillary costs.

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To explore new methods of casting process

Posted on January 19, 2012 by admin

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gear box castings – China Manufacturer

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New castings/">investment casting process in the development of improved methods based on conventional technology, the development of new

technology methods to further improve the casting quality, improve production efficiency, expand the application of investment

casting. \"Casting\" No. 6, 1978, reported the Beijing oil pump nozzle plant using a combination big cage module technology. Cage

of each component to ensure adequate stiffness module and double gating system, steel utilization increased by 10%: so. Hebei

Institute of Technology, etc. by controlling the casting, inner runner, gate rods clotting time, within the M ≤ M ≤ M pieces of

stick, and make solidification within the runner and gate closing bars in between the rods in the liquid gate pour melted metal

cylinder, gate-free casting. 1982, No. 2 \"casting\" Tsinghua University reported the use of vacuum suction casting filling,

control clotting time, coagulation, including runner, sprue is not solidified, remove the vacuum, the liquid alloy sprue return

within the furnace. The filling process performance, production of thin-walled castings, steel high utilization. The lifting of

the vacuum suction casting, according to thermal conductivity and absorption shell casting solidification time determine.

\"Casting\" in 1984 published the first three articles Ye Yong introduced electrophoresis system shell process. Module on the wax

dipping conductive coating, electrophoresis suspension for a small amount of chain phosphate electrolyte, adsorption of cations

to the surface of refractories in electric field, electrophoresis refractory occurs, the plot to look like the surface, and

electro-osmosis phenomenon occurs, a certain strength of shell. Electrophoresis system for small shell process, short production

cycle. \"Casting\" No. 4, 1984 reported the semi-western Beigong water gypsum, plus quartz powder, quartz glass, clay, plaster

filler for refractory casting process, production of large, complex aluminum castings. 621 semi-water gypsum, coal, fire-

resistant brazing filler stone, plaster shell to reduce shrinkage and reduce cracking. Titanium and its alloys are important in

the aerospace, petrochemical materials used in the late 1970s with the investment casting titanium castings, China is the world\\ s

top five investment casting titanium producers. \"Casting\" published in 1979 (2) Shanghai Iron and Steel Institute the use of

propane in the high-temperature vacuum pyrolysis, in corundum (TEOS hydrolysis graphite shell surface of the vapor deposition,

the titanium investment casting process. Beihang material Institute for the use of phenolic resin binder, graphite powder (sand)

for the production of graphite refractory shell, roasted in a vacuum resistance furnace, carbonized resin binder, obtained with

good strength and permeability of the shell, titanium production high-speed supercharger blades Shenyang Foundry Research

Institute in the \"casting\" 1986, No. 3 published articles, describes the use of ZTS-1 resin coating paired with toner, p-

toluenesulfonic acid as a curing agent, sand and graphite, ethanol preparation of coated sand , making shell, shell roasting at

high temperature and vacuum processing method of production of titanium casting process. \"casting\" No. 7, 1987 article published

Libang Sheng, the use of zirconium oxide ceramic powders, zirconia sol as a binder, the preparation of coatings prepared shell,

for titanium investment casting research.

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to improve the tensile strength of gray iron casting method

Posted on December 23, 2011 by admin

In order to improve the tensile strength of gray iron castings, alloy approach should be taken to improve the tensile strength of gray cast iron, with traces of appropriate alloys, such as: chromium, molybdenum, tin and other elements can also be significantly improved the tensile strength of gray iron castings at the same time to cooperate with the inoculation of molten iron.
It also can be used to lower carbon equivalent, gray cast iron in most of the carbon content of 2.6% to 3.6% silicon content of 1.2% and 33.0%, according to the thickness of gray cast to take as far as the lower limit, an appropriate increase in manganese content, generally gray cast iron manganese content of 0.4% to 1.2%, does not appear in gray cast the case as far as possible take the white cap.
Nodular cast in aluminum casting resin casting method is commonly used in sand, lost foam casting, followed by special casting methods, such as: metal casting, investment casting, plaster casting, etc. and can be divided into clay sand casting sand, Sand organic binder resin self-hardening sand, lost foam, etc. nodular cast in aluminum casting weight and size range is very wide, only a few grams of the lightest weight, most weight up to 400 tons, the wall thickness thin, only 0.5 mm, the thickness of more than 1 meter length by a few millimeters to ten meters, to meet the requirements of different industrial sectors.

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to improve the tensile strength of gray iron casting method

Posted on December 23, 2011 by admin

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smelting iron, how to control the temperature of hot metal

Posted on December 21, 2011 by admin

Melting cast iron, hot metal temperature is as high as possible
Gray cast iron with hot temperature strength, hardness of the relationship:
A, in the 1300 ~ 1460 ℃ range, with the hot metal temperature, the tensile strength, Brinell hardness values ??are increased.
B, in the 1460 ~ 1500 ℃ range, with the hot metal temperature, the tensile strength continues to rise, but little change in

Brinell hardness.
C, in 1500 ~ 1600 ℃ range, with the hot metal temperature, the tensile strength is rising, but the Brinell hardness decreased.
2, with the hot metal temperature increasing its chemical composition and gas content changes:
In cupola melting, the existence of two reactions:
2 [C] + O2  2CO
[Si] + O2  SiO2
In a certain chemical composition and pressure, there is a balance between the reaction temperature, for with C3.3%, Si2  0% of

the iron, the equilibrium temperature TP is 1420 ℃, the molten iron in the TP +50 ℃, it will happen reduction reaction of Si:

SiO2 +2 C → [Si] +2 CO
Therefore, the production can be observed, the higher the temperature of hot metal, burning less silicate, silicon and even by

the phenomenon. Tests showed: low pouring temperature will increase the porosity of the rejection rate, and high pouring

temperature will increase the shrinkage of the rejection rate. Therefore, the production conditions, generally considered the

best pouring temperature is 1395 ~ 1420 ℃, but their different production conditions, can not copy someone else s conclusions.
3, the choice of hot metal temperature should be considered casting wall thickness, size and choice of grades.
Usually the greater wall thickness, temperature and pouring temperature can overheat due to lower; and with the higher grades,

the lower the carbon equivalent, hot metal temperature will rise. It is worth noting: the higher the grade, although the higher

temperature requirements, but the superheat is not only not increased but decreased, so, despite the pouring temperature of high

-grade casting high, but the mobility of hot metal pouring temperature is lower than low grade casting of mobility, the reason

is: the latter than the former high superheat.

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Technology: the evolution and development of pneumatic valve works

Posted on November 10, 2011 by admin

Evolution: pneumatic valve was evolved from the stopcock. It s 90 degrees with the same movement, the body is different is the cock ball, a round hole or channel through its axis.

Spherical and the proportion of openings should be such that when the ball rotated 90 degrees, in imports and exports should all show spherical Department to cut off flow. This

type valve in the pipe can be installed anywhere.

gear box castings

Works

Just use the pneumatic valve pneumatic air source 90 degrees Used for the operation and a small rotation torque can be closed tightly. Complete equality of the body cavity for

the media to provide a little resistance, through the flow channel. Generally considered the most suitable valve opening and closing directly to do with, but the recent development

has been designed to give it a throttle valve and flow control purposes. The main features of the valve itself is compact, easy operation and maintenance for water, solvents, acids,

and natural gas work in general media, but also for poor working conditions of media, such as oxygen, hydrogen peroxide, such as methane and ethylene . Valve body can be a

whole, it can be modular.

The reality of the role of pneumatic valve

Pneumatic valve works by rotating the valve spool to make the flow or occlusion. Pneumatic valve switch light, small size, can be made large caliber, reliable sealing, simple

structure, easy maintenance, with the spherical sealing surface often in the closed state, is not susceptible to medium erosion pneumatic valve in the industry that is widely

applications. Pneumatic valves and plug valves belong to the same type of valve is only pieces of it off is a sphere, a sphere around the center line of a rotary valve to achieve

open and close a valve.

Advantage

Pneumatic valve in the pipe is mainly used to do cutting speed, the flow of media distribution and change direction. Pneumatic valve is widely used in recent years a new type

of valve, it has the following advantages: 1. Fluid resistance, the resistance coefficient and the length of the pipe with the same. 2. Simple structure, small size and light weight. 3.

Strong, reliable, current valve sealing surface material widely used plastic, sealing in the vacuum system has also been widely used. 4. Easy to operate, opening and closing

rapidly, from fully open to fully closed as long as the rotation 90 °, to facilitate the remote control. 5. Easy maintenance, simple pneumatic valve, seals are generally active, are

relatively easy to replace demolished. 6. In the fully open or fully closed, the ball and seat sealing surface and the dielectric isolation, the medium through, will not cause erosion

of the valve sealing surface. 7. Wide range of applications, from small to a few millimeters in diameter, large meters, from high vacuum to high pressure can be applied. 8

because the pneumatic valve power source used is a gas, usually 0.2-0.8MPa pressure, relatively safe. If the pneumatic valve leak, then the relative hydraulic, electric, the gas can

be directly discharged to the environment without pollution, and high security. 9 and turbine rotation relative to the manual valve, the pneumatic valve of large diameter can be

configured (manually and turbine rotating valve DN300 diameter generally in the following, pneumatic ball valves up to DN1200 diameter now.) Pneumatic valve has been

widely used in petroleum, chemical, power generation, paper, atomic energy, aviation, rockets and other departments, as well as people s daily lives.

Pneumatic valve structure can be divided by:

alloy steel casting

A floating ball valve pneumatic valve pneumatic ball is floating in the medium under pressure, the ball can produce some displacement and pressed in the export side of the

sealing surface to ensure the outlet seal. Floating pneumatic ball valve of simple structure, good seal, but the media sphere to bear the load of work to pass all export ring, so to

consider the ring material can withstand the sphere of media work load. This structure is widely used in low-pressure valve.

Second, the fixed ball pneumatic valve

Pneumatic ball valve is fixed, pressure produces no movement.

Floating ball valve comes with a fixed seat, by the media pressure, the valve seat have moved to seal pressed on the sphere, in order to ensure sealing. Usually with the ball in the

upper and lower shaft with bearings, operating torque, suitable for high pressure and large diameter of the valve. In order to reduce the operating torque and pneumatic valve to

increase the reliability of the seal, valve seal has emerged in recent years, both in the sealing surface injection pressure special lubricating oil, to form a layer of film that

enhances the sealing, and reduce operating torque, more suitable for large-diameter high-pressure valve.
Third, the elasticity of the ball valve pneumatic valve pneumatic sphere is flexible. Ball and seat rings are metal materials, sealing pressure than the large, rely on the media

itself can not seal the pressure has reached the requirements to be imposed by external forces. This valve suitable for high temperature and pressure medium. Elastic sphere is the

sphere wall at the bottom of a flexible open slot, and access flexibility. When the closed channel, wedge-shaped head with a stem and the valve seat to open up the ball pressed to

seal. Release the ball before turning the wedge-shaped head, along with sphere to restore the original prototype, the ball with a small gap between the valve seat, sealing surface

can reduce the friction and operating torque. Pneumatic valve according to their location can be divided into straight-channel, three-and right-angle type. The latter two ball

valves for the distribution media and change the flow of media.

Pneumatic ball valve manual

1, range

This manual applies to flanged end of the electric (or pneumatic) valve.

2, composed of

By the electric (or pneumatic) actuator (20) and valve body parts connected by its bracket (18) and the connecting shaft (17).

3, the use of restriction

Temperature and pressure valve limit l plate showing the maximum and minimum operating temperature of the maximum allowable operating pressure. l Use PTFE or RTFE

seat and seal materials, operating temperature should be 150 degrees to 200 degrees. Other types of seat and seal the operating temperature, should be KI factory checks. L low

nominal pressure level valve (PN), may indicate that the valve in the normal temperature conditions the maximum working pressure. (For example: PN4.0, that its operating

temperature-290C ~ 380C when the maximum working pressure of 40Bar (4.0MPa)). l electric or pneumatic actuators See Notes on the corresponding instructions.

4, the installation

1), removing the protective cover on both sides of the flange side, the valve is fully open state to wash clean. 2), the signal should be required prior to installation (electric or

gas) for the whole test (to prevent vibration affecting transport performance), after passing the on-line installation (wiring by electric actuator circuit diagram). 3), prepared with

the pipe connection, it shall be washed and cleaned of residual impurities in the pipeline (these substances may damage the valve seat and ball). 4), during installation, please do

not use the valve actuator as the lifting of the lifting some point, to avoid damage to the actuators and accessories. .5), This type valve should be installed in horizontal or vertical

pipe direction. 6), installation of the pipeline near the falls or not there is the phenomenon of external force can be used to pipe supports or supports to eliminate the deviation

from the pipeline. 7), and pipe connections, please use the provisions of cross-locking torque flange bolts. 4, operation and use 1), the operator be sure that the piping and valves

have been washed off. 2), the operation of the valve actuator according to the size of the input signal to drive the valve stem rotation to complete: forward rotation 1 / 4 turn (90

°), the valve off. Counter-rotating 1 / 4 turn (90 °) when the valve is open. 3), indicating the direction of the arrow when the actuator in parallel with the pipeline, the valve is

open; indication arrows and vertical lines, the valve is closed.

5, maintenance

Have a longer service life and maintenance-free period, will depend on several factors: the normal working conditions, to maintain harmony temperature / pressure ratio, and

reasonable corrosion data Note: ● valve in the closed state, the body still inside ● there is fluid under pressure before servicing, and to relieve line pressure valve in the open

position ● maintenance, disconnect the power or gas supply ● servicing, with the bracket from the actuator 1), was re-tighten the packing at l If the packing culvert at a micro-

discharge occurs, shall be re-locking stem nut (13). l careful not to lock tight, usually re-lock 1 / 4 turn to 1 ring, leakage will stop.

2), replace the valve seat and seals. A), remove the valve is half open l position, flush, clear body of dangerous substances that may exist inside and outside. L close the valve,

removed both sides of the flange bolts and nuts , then the valve is completely removed from the pipeline. l order of demolition drive – actuator (20), connecting bracket (18), lock

washers (14), stem nut (13), butterfly tabs (12), Glam (11), wear-resistant films (10), stem packing (9) l remove the body cover bolts (5) and nut, the valve cover and valve body

separation, and remove the valve cover gasket (16). l confirm the ball (3) in the “off” position, which can be more easily from the body out, then remove the seat. l from the valve

stem in the hole, push down slightly (6) until it is completely removed, then remove the O-ring (8) and lower stem packing (7) Note: Please exercise caution to avoid scratches the

surface and the valve stem body parts of stuffing box seal B), re-assembled l remove parts for cleaning and inspection is strongly recommended spare parts package to replace its

valve seat and valve cover gaskets and other seals l by reverse order of disassembly for assembly. l with the specified torque, cross-locking flange bolts (5). l with the specified

torque, tighten the stem nut (13) l install the actuator, the input signal corresponding drive spool rotated by rotating the stem, the valve to open and closed position. l If possible,

install pipes in the back before, according to relevant standards for pressure sealing of the valve testing and performance testing. D, model representation: as the valve Q11S-16C

prior to this were “S” that is the older method, “S” pay on behalf of the plastic seal is now with the “F” said Representative PTFE or PTFE material

sand casting

Classification and characteristics of pneumatic valve

Pneumatic valve with O-pneumatic valve and pneumatic valve V-divided. O-pneumatic ball valve with floating structure, core ball for precision casting, chrome plated

exterior, with enhanced PTFE seats, stream crossing and the same pipe diameter, flow capacity significantly, flow resistance is extremely small, closed When no leak-off valve is

generally used to do, particularly for high viscosity, V-ball valve with fixed structure, the ball core has opened a V-notch, cutting can be achieved with fiber, granular media can

be different according to the process equipment use pneumatic or electric actuators, pneumatic valves and electrical components, respectively, ball valve, pneumatic valve, such

as one to achieve the proportional control valve positioner shall be equipped with electric proportional control valve as required to achieve the election or electronic actuator

with servo amplifier. From the material, can be divided into: carbon steel ball valve, stainless steel 304 ball valve, ball valve and brass valve 316 according to the pressure, can

be divided into: high-pressure ball valve and low pressure pneumatic valve: mainly used in oil, natural gas , hydraulic oil, construction machinery and other low pressure

pneumatic valve industry: mainly used in corrosive media such as water pipes on the road!

open die forging

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Water-based paint spraying process and equipment design should pay attention to the problem.

Posted on November 10, 2011 by admin

Ma Chunqing, Li Yan Feng, bore flowers, Zhao Baogang

(China First Tractor Group Co., Ltd. Materials Technology Institute, Luoyang 471004)

Abstract: This paper describes the characteristics of water-based paint, and the spraying process and equipment design should pay attention to some of the main issues

discussed.

Keywords: water-based paint; spraying; equipment design

1 Introduction

With the paint industry, paint color, variety, more efficient division of labor is also getting smaller. However, in paint manufacturing and construction process due to the large

number of organic solvent emissions to the environment cause great pollution. To limit emissions of organic solvents, coatings of high solids, solvent-free, water-based growth

has shown a growing trend, the industry widely shared “4E” paint (Economy, Efficiency, Ecology, Energy) referring to the paint. Among them, water-based paint is the very rapid

development in recent years an area [1], but because of water-based coating, compared with solvent-based coatings, there are many differences: water-based paints with water as

diluent, solvent-based coatings to toluene, xylene , butyl acetate and other organic solvents as diluent; during the spraying process and equipment design, the need to fully

understand the characteristics of water-based paint, according to their characteristics in order to design a scientific and rational spray technology and equipment.

2 the characteristics of water-borne coatings [2]

valve castings

Water-based paints and solvent-based coatings with a low evaporation rate compared to the high surface tension, high conductivity, corrosion resistance and easy to produce

the characteristics of bubbles, leading to water-based paint in construction equipment and processes, compared with solvent-based coatings are different. Water-based paint used

in the main solvent of water and solvent-based paint solvents used in some common characteristics in Table 1.

Table 1 Main characteristics of water compared with the commonly used solvents [2-3]

Evaporation of water in water-based paint by painting the main room to control temperature and humidity, and solvent-based paint thinner can be adjusted to adjust the

construction of the evaporation rate of solid content. Construction of water-based paint solids content is usually 20% to 30%, while the solvent-based paint in construction of

solid content as high as 60% to 70%, so the smoothness of a good water-based paint. Rheology control of coatings technology is the key to the design of water-based paint, water

-based paint rheological properties shown in Figure 1.
Figure 1 Rheological properties of water-based paint

When the water-based spray paint, in a state of high shear, the viscosity of water-based paint declined rapidly, to ensure that the particles of the coating has a good effect; when

the shear force removed, the rapid recovery of high-viscosity state, thus ensuring good metal paint orientation effects and anti-sagging properties. Water-based paints and solvent

-based coatings compared to the greatest advantage is the low VOC emissions. Different process systems of VOC emissions in Table 2. Europe a “water-based paint in water-

based coating + + two-component varnish” of the process system is more common to meet European standards for VOC emissions.

Table 2 coating process VOC emissions system comparison

3 water-based coating process and equipment design should be noted that some of the problems

Water-based paints and solvent-based paint coating process is basically the same, but in the selection of materials and equipment on the process parameters to be set according

to the characteristics of water-based paint selection, the typical process is:

Pre-treatment [on-line pre-degreasing → washing → degreasing → washing 1 → 2 → (deionized water washing 1) → (table notes) → (phosphate) → washed washed 3 → 4

→ (deionized water washing 2) → artificial Chuishui → drying] → → Spray paint strong cold leveling → → → drying → flash dry cooling (forced cooling) → spray paint

leveling → → → drying → flash dry cooling (forced cooling) → offline

3.1 Pre-treatment

Various types of materials or products in all kinds of dirt paint before its removal, leveling and covering certain types of chemical conversion film of all preparatory work,

collectively paint before the surface treatment. Paint surface treatment before coating technology is an important part in the whole process, the need to use cleaning agents, surface

modifiers, phosphating agent, passivating, oxidizing agents and other fine chemical products, these products form a complex chemical , the performance differences, if used

improperly or in use in the bath is not well controlled and managed, but adversely affect the quality of the coating [4]. As the water-based paints to water as a diluent, surface

tension of water to 72.6dyn/cm, larger than the average organic solvent is an organic solvent paint used 2.5 times (Table 3), making it difficult to infiltrate the substrate, easy to

produce shrinkage So on the one hand through the water-based coatings formulations added surfactant to reduce surface tension, improve wetting, on the other hand, during the

pre-treatment of the workpiece when the workpiece surface quality requirements higher.

Table 3 coating the surface tension of organic solvents commonly used
3.1.1 degreasing

Degreasing of steel surfaces in strict accordance with the requirements of GB/T13312-1991 inspection and control. This method is a standard G-polar solution drops 2 drops

(0.1mL) was tested on the surface, immediately coated with a glass rod into 20mm × 40mm coverage area, will experience a special type A membrane in the solution close to the

oil dipstick , 1min after the observation of discoloration. If the A-type oil dipstick test color uniform, continuous integrity, that is qualified, otherwise failed. Both solvent-based

paints or water-based paints, oil quality is good or bad, the quality of the product film will have a greater impact, but for spraying solvent-based coatings, the surface oil removal

is not complete, the appearance of the coating defects not immediately show it, but for water-based coatings, degreasing the surface is not completely, on its surface would be

difficult to form a complete coating, so water-based paint spraying, the pre-treatment quality is more important.

open die forging

3.1.2 Phosphate

Phosphate coating inspection should be strictly in accordance with GB6807-1986, a 3% sodium chloride solution impregnated in 15 ~ 25 ℃, or copper sulfate solution, bit by

bit. Can also be painted after the salt spray test to assess. Copper sulfate drip liquid formula is as follows: CuSO4 · 5H2O is 41g / L, NaCl is 35g / L, 0.1mol / L of HCl to 13mL

/ L. Water-based paint requirements of the phosphate film is basically the same with solvent-based coating, phosphate coating must be uniform complete fine without hanging gray.

Strong cold 3.2

Latent heat of evaporation of water as 2457.22kJ/kg, while painting the latent heat of evaporation of the solvent used: xylene 343.2kJ/kg, butanol is 590.2kJ/kg, ketones of 343

~ 444kJ/kg, than those of low water , therefore the thickness of the paint coating the same cooling effect on the workpiece larger water-based coating, so that the tractor chassis,

engine and other major form by the casting, coating for corrosion-based, less demanding on the workpiece surface decoration painting, can be no strong cold.

3.3 spray (bottom surface) paint

Spraying water-based paint is generally used by the air gun with the same solvent-based coatings, but the environmental conditions (mainly temperature and humidity)

requirements compared with solvent-based paints there are some differences. In water-based paint spray paint room, the volume expansion of water into steam 1244 times, spray

paint can instantly increase the humidity in the room, when the humidity reached 90% when applied to the material being coated on the film will be flowing down the [ 5].

Therefore, spraying water-based paint spray booth when the humidity control is important, but also to maintain the temperature does not produce flow in the range of hanging and

flowing generally believed that the temperature at 15 ~ 30 ℃, relative humidity of 60% to 80% is more appropriate. Solvent due to water corrosion than large spray booth

circulating water system, especially preferably made of stainless steel. Paint the room must have adequate air conditioning thermostat device. Domestic automobile paint spray

booth humidity in winter can be thermostat, thermostat humidity in summer is very rare, because the required cooling capacity is too large, so little to send cold wind. Therefore,

in hot and humid areas, if you use water-based paint spray booths must install central air conditioning in the summer, also needs to get cold, so as to ensure the construction

quality water-based paint. Water-based coatings and solvent-based spray paint environmental conditions shown in Figure 2.

Figure 2 Water-based paints and solvent-based paint spray environmental conditions

3.4 flash-

Dry the coating film after the flash of leveling solvents (including water) of the pre-evaporation process, its purpose is to prevent the water contains large amounts of solvents

or wet coating (water-based basecoat in the water content of about 63% [6 )] suddenly entered the high temperature (> 100 ℃) of the drying furnace. Dry process is set to flash,

flash drying time and temperature according to the specific parameters used in the performance of water-based coating, the coating on the workpiece quality requirements and the

required temperature drying oven to determine. In general, wet-wet process, the oven drying temperature is high (generally above 100 ℃, higher than the boiling point of water

temperature), the film is high gloss and appearance requirements, procedures should be set to flash dry. Flash off time to determine, on the production line, the flash-off time is

mainly affected by the chain speed. Flash off time is short, the coating is not water and solvent evaporate in time lead to pinhole after high temperature baking, prickly heat and

other defects; flash dry for a long time, the film surface is too dry, the coating prone to orange peel and other defects. Flash off time to a reasonable choice, but need to increase

the flash-heating zone, or prone to sagging, bubbles and other quality problems.

3.5 Drying

With design principles similar to the spray booth and drying room due to the higher moisture content in the air will cause corrosion of equipment, so the drying room wall also

requires the use of stainless steel. Meanwhile, the main water-based paint thinner is water, water evaporation and spray chamber temperature and humidity have a greater

relationship. When the humidity is constant, as the temperature rises, the water evaporation rate increases; when the temperature is constant, the humidity increases, water

evaporation blocked; when the relative humidity is too large, slow evaporation of water, the construction process is easy to produce flow linked to other film defects. As the

latent heat of evaporation of water (see Table 1), the solvent is generally 5 to 7 times the heat capacity drying chamber to a moderate increase. Meanwhile, the organic solvent

evaporates slower than water, resulting in water-based paint drying time is longer, and was painted coating temperature should not be too fast. In addition to water-based coating

film obtained by electrodeposition coating method, by electroosmosis so little moisture in the wet coating can be directly subjected to high temperature baking, the other a high

water content of water-based coating film have to rely on dry and sub-temperature (below 100 ℃ heat for some time), the film basically evaporate the moisture before drying

temperature rose to process, or due to water boiling at 100 ℃ generated intense film defects. Water in the coating, paint and solvent in the coating, paint the typical convection

heating drying temperature and time curves shown in Figure 3 and Figure 4. Have such experience in the outdoor air drying clothes done fast, on the contrary, slow or poor

ventilation did not dry, the air relative humidity, and also done slowly. This is the principle of water-based paint dry. Thus control the drying room to dry and air humidity on the

drying time and the effect is very important.

Figure 3 Water-based paint coating, paint curing (drying) curve
Figure 4 solvent in coating, paint curing (drying) curve
3.6 automatic spray systems

The main water-based paint solvent is water with high conductivity, if the use of solvent-based paints commonly used internal power rotary cup (see Figure 5), electrostatic

paint system will leak from the transmission, so early in the application of general water-based paint Use an external power rotary cup (see Figure 6).
Figure 5 Internal power rotary cup
Figure 5 Internal power rotary cup
Black acrylic enamel is priced at 18 yuan / kg, solvent price of 10 yuan / kg, while a water-based paint is priced at 25 yuan / kg, with water as solvent, the cost is negligible.
A workpiece paint consumption: 3 ~ 4kg, 4kg take solvent (dilution and cleaning) consumption: 4kg × 1 / 3 = 1.33kg

Paint cost 4kg × 18 元 / kg +1.33 kg × 10 元 / kg = 85 yuan / piece

Waterborne coatings cost: 4kg × 25 元 / kg = 100 yuan / piece

Water-based paint spray booth, room and drying room leveling the best material used for stainless steel, to prevent the construction process equipment corrosion caused by

humidity, equipment costs than solvent-based coatings can increase the equipment costs about 10%. If the state or water-based coatings industry to the promulgation of fire and

environmental protection facilities and equipment standards, with common fire-fighting facilities to replace automatic fire extinguishing system, water-based spray coating line is

not set combustible gas alarms and gas treatment plant, you can reduce the equipment investment 500,000 yuan or more. In summary, water-based paints and solvent-based paints)

in use, materials and equipment investment cost comparison, the former slightly higher than the latter, but if the water-based paint is not considered automatic fire extinguishing

systems, flammable gas alarms and gas treatment device, the equipment investment is roughly equal between the two. Meanwhile, water-based paint with recyclability, according

to the characteristics of the workpiece, generally 10% to 30% recyclable, then if the environmental costs, greatly improve the operating environment of workers, occupational

diseases to reduce the combination of factors taken into account, the former is used, material costs also lower than the latter, so water-based paint or from the social benefits in

terms of economic considerations, are fully worthy application.

iron castings

Table 5 Water-based paints and solvent-based paints cost more

6 Conclusion

Solvent-based coatings and water-based paint is the fundamental difference: the use of solvent-based paint toxic, pollution, burning of the organic solvent as a diluent, but the

main use of water as a water-based paint thinner. Although the performance of waterborne coatings also need to improve, but instead of solvent-based paints should be the trend.

Spread of waterborne coatings is ripe in the next few years, a great water-based paints instead of solvent-based coatings overall trend. Construction technology for waterborne

coatings research is very important, water-based paint on paper during the coating process and equipment design should pay attention to some of the issues briefly discussed, and

its view is that during the water-based paint spraying process design, the use of some water-based paints and production units and a summary of some relevant technical

information for colleagues during the relevant design reference.

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Yangjiang hardware characteristics of economic development, pen knives, scissors and brand polish

Posted on November 10, 2011 by admin

In recent days, Scissors Yangjiang hardware industrial development caused the provincial experts and media attention, the Nanfang Daily Group sent a special report to the city to carry out interviews and reports, the Provincial Academy of Social Sciences of experts to the city to conduct special investigations of Yangjiang hardware Scissors industry highly. As one of the city s traditional industries, metal knives, scissors and the development of industry has accumulated years of experience, industry bigger and stronger influence on the industry, development of special economic Yangjiang has become an important part.

Sit tight in the leading position in the national industry

Yangjiang knives, scissors and a long history. 1400 years ago, can produce a variety of civilian civil Yangjiang knife, opened the history of Yangjiang, the knife industry. Since reform and opening to join the metal knives, scissors and private capital venture industry is preferred. Previous municipal government attaches great importance to the development of industrial metal knives, scissors, knives, scissors and industry put the metal pillar industries with local characteristics Yangjiang important position, a range of policies to promote the healthy and rapid development of industry. In recent years, has built a national household scissors and tools for Quality Supervision and Inspection Center of metal, the formation of Yangjiang, South China University of Industrial Technology Research Institute, the construction of technological innovation Scissors Yangjiang hardware platform, introduced the “knife on accelerating the Yangjiang hardware cut views of the implementation of industrial development “, planning a professional parks and other hardware scissors, knives, scissors guide Yangjiang hardware industry relying on technological progress, the adjustment of product structure, expand business scale and enhance the comprehensive strength.

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In October 2002, the first China (Yangjiang) International Hardware Fair held in the city knives, scissors, knives, scissors Yangjiang hardware products to global customers began to show their new image. As a solid industrial base to support the knife Fair has been successfully held 9 th, Scissors Yangjiang hardware industry also rely on export-led export-oriented, embarked on a development fast track. Over the past 10 years, Scissors Yangjiang hardware industry has shown rapid development trend, the average annual output value increased 25%, China chopper center, China center scissors, knife center of China, China s beauty make-up tool center, China center casters, scaffolding central China, China Scissors machinery manufacturing centers GuoZiHao signs have settled Yangjiang. In 2008 the global financial crisis, Scissors Yangjiang hardware industry calmly and quickly out of the woods, the steady expansion of industrial scale, and further consolidate the industry leader in the country. 2010, the city s industrial output value 22.3 billion yuan metal scissors, the size of the city s total industrial output value of more than 32%; the city s total industrial production knives, scissors about 70% of national output, exports account for about 85% of national exports.

Bao Jianfeng from sharpening out, plum blossom from the bitter cold. Scissors Yangjiang hardware industry again experienced fluctuations in domestic and international economic environment, seize the opportunity to laugh at adversity, head forward. Come from hard work in the thorns, the innovation beyond the self, metal scissors Yangjiang industry has become the most typical, most mature, most active, the most prominent contribution to the pillar industry of the city s economic and social development plays an important role.

Regional industry clusters developing mature

Scissors into the hardware business gathering in the industrial park, you will here, dotted with factories, cooperative and orderly division of labor, a complete set of industry and praise. After years of development and accumulation, Scissors Yangjiang hardware industrial scale become more prominent, attracting about 15 million employees, has become the region s largest and most complete industrial chain of industrial clusters, and even the most mature of the traditional Guangdong processing industry one cluster.

City Department of Industry and Information Bureau statistics show that last year, the city s metal knives, scissors and more than 1,300 enterprises, the domestic market covering all provinces and more than 160 countries and regions. This is more than 1,300 enterprises, including the production of knives, scissors, pliers more than 900 enterprises, more than 100 enterprises producing metal type, supporting more than 300 enterprises, the product of more than 3600 kinds. Stainless steel strip from smelting, knives, scissors machinery manufacturing, mold making, casting parts, accessories processing, heat treatment, plating, packaging to technical research and development, e-commerce, logistics and distribution, a complete industrial chain, metal knives, scissors and enterprises constitute a complete and mature industrial chain, and gradually form a specialized division of labor, social cooperation and common development of the production pattern. As the ever-increasing industry gathering, Scissors Yangjiang hardware industrial cluster has been selected for China s Top 100, has been identified as national and provincial industrial base in China and Guangdong Province Scissors Torch Program Industry Base metal scissors, metal scissors, Guangdong Province, industry cluster Upgrade Demonstration Zone, Yangjiang, Guangdong Province, eastern towns to become professional town hardware tool products.

With the scale of the industry constantly, gradually increase the industry gathering, Scissors Yangjiang hardware companies step by step to achieve a stronger and bigger. In recent years, the industry set up in Guangdong, Circle Scissors, Guangdong Silver Eagle Co., Yangjiang knives, scissors and three sub-18 enterprise groups, cultivated Everlight, Silver Eagle, 18 children, Sony, Kim Heng, Jinhui, Shun, flywheel, strange is, the third brother, Kang force of more than 10 billion yuan output value enterprises. This is more than 10 companies over a hundred million metal scissors the front ranks among the nation s comprehensive strength. Product mix also had a single kitchen cutlery, based on the expansion of the multi-purpose knife, knife set, multi-purpose pliers, bottle opener, cutlery, baking tools, screws, castings, wire, industrial casters, decorative swords, police tool , garden tools, beauty equipment sets, construction scaffolding, hunting ladder, folding trolleys, industrial vision from the “small knives, scissors” gradually into the “big hardware.”

ductile iron casting

Promote transformation and upgrading to achieve “gorgeous turn”

Scissors Yangjiang hardware industry through the golden years, as the economic environment changes, the adjustment of industrial policy, how to jump a step further, and create new glory? Held at the end of May this year to upgrade the city s metal scissors have been made on the mobilization of the General Assembly: to promote transformation and upgrading, to achieve magnificent turn.

In fact, there are many unwilling people, Yong forefront of the business one step ahead, as the Scissors Yangjiang hardware industrial transformation and upgrading of the benchmark. To develop independent innovation, invention has been committed Scissors Yangjiang hardware companies continue to upgrade the main driving force in recent years, the emergence of a number of established industry-wide provincial and municipal enterprise technology centers, research centers, and vigorously carry out independent innovation, commitment invention active national patents and foreign patent applications of enterprises; more business from the product structure optimization to find a breakthrough, ceramic cutting tools, construction alloy template, the ancient blades and other products innovation, “No I have, I have excellent, excellent people I am special “product development philosophy become very popular; marketing strategy in the transition, the domestic markets and export walking on two legs more and more enterprises; brand strategy is to strengthen, more and more national, provincial successfully created brand name standard , scale and benefits for enterprises of double harvest.

Policy also force the hand of support. The city s industrial transformation and upgrading hardware Scissors General Assembly, in order to upgrade to the main line to raise the overall quality and efficiency of industrial development, to ensure that metal knives, scissors and industrial structure was optimized, the development of an apparent change in the industrial core competitiveness will increase markedly, significant market share upgrade. To “12 5″ end, the city s industrial output value of industry, metal knives, scissors and reached 600 billion yuan, up 25%, the output value 50 million businesses, over 10 billion business for more than five, three or so listed companies, to out of a meet market conditions, with distinct regional characteristics of the industry cluster development in new ways. To this end, the municipal government will continue to increase efforts to support the hardware industry, knives, scissors, knives, scissors and hardware to speed up trade Yangjiang City, River City Silver Ridge and two metal scissors Yangdong Vientiane professional park s construction, further improve the metal scissors industry R & D center, product inspection and testing center, and guide the city s colleges and universities expand research cooperation enterprise hardware scissors, knives, scissors and hardware companies for the city to build a more comprehensive service platform.

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Riding a boat behind. Scissors Yangjiang hardware industrial development in the new round of economic tide to achieve the “magnificent turn,” must self-pressurized, metal scissors with leading global companies to benchmark, identify new goals, new challenges and move towards a new height; continue to strengthen independent innovation and accelerate the pace of transformation and upgrading from the current sitting of the national daily hardware Scissors production center, to enhance national and global metal knives, scissors and corporate R & D center, product testing center, exhibition center and product distribution centers .

Scissors Yangjiang hardware industry, the next “golden years” worth the wait.

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largest production base casting

Posted on November 9, 2011 by admin

Yuchai diesel engine built Asia s largest production base casting

Total investment of $ 1.7 billion, an investment of 960 billion Yuchai Foundry Center project construction speed speed again: Following the completion of civil works 250 days in advance, the project s main equipment installation work is completed two and a half ahead of schedule. According to the schedule, March 15, the first casting production line will be officially put into trial operation. In order to achieve this goal, during the Spring Festival this year, the Tiger, the construction of more than 160 teams to give up a break, give up and their families the opportunity to promote the building of overtime.investment casting foundry

Asia s biggest base built in the Yuchai

Yuchai ushered in the opener this year, the diesel engine orders in January reached 10 million units, casting rough short supply, so Yuchai Foundry Center launched the project becomes more important. According Yuchai Foundry Center project manager Liang Chengzhen introduction,cast iron foundry the main installation normally take four months to complete, now only a month and a half basically completed. The current stand-alone part of the equipment has begun commissioning, joint commissioning is part of the equipment in late February will achieve full range of foundry joint commissioning in early March of small series production.

Yuchai Foundry Center project planned total area of ??1800 acres, is completed, annual output of high-strength, thin-walled, high-quality, high levels of diesel engine cylinder block, cylinder head castings rough 290 thousand tons, covering 0.8 to 12 liters varieties micro, light, medium, heavy-duty diesel engines. Yuchai Foundry casting center is a major upgrade production technology. The key, key processes using the world s leading brands of imported equipment, auxiliary processes using first-class equipment, will form a highly efficient, high quality, low cost, stable, reliable carbon steel casting, environmentally friendly class of casting production line, is Asia s largest production base of diesel engine castings .

“Foreigner” site engineer for the New Year

During the Spring Festival this year, a total of Yuchai Foundry Center project more than 10 construction units from more than 160 builders of their duties, overtime work. Site there are five foreign engineers and hard work with everyone, the site had a memorable Chinese New Year. Christian Baker, Mark British Library grams, Dite Man Ya, Ralph Schneider 4 from Germany, Asia side from Austria. Four German engineers are HWS s technical staff, 26-year-old Baker told reporters that New Year s Eve day, at noon to eat is Chinese food in the evening in the hotel to make their own Western Yulin, opened a small party to celebrate the Chinese New Year, had a great to enrich. Mark is from Frankfurt, electrical engineer, he said, very much like Chinese food, and now we can use Chinese chopsticks. Yulin is also very warm and friendly people, live very happy here.

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