Market space for die casting parts manufacturer

    The market space for die casting parts manufacturer generally includes automobile and transportation facilities, construction and residential products industry, instruments and apparatus, electric power and telecommunications industry, electronic computer equipment and other etc.. The output of Chinese die casting is increasing year by year. Since 2001, the annual growth rate has reached 13.25%.
At present, China's auto industry is in a rapid growth period, the scale effect is beginning to show. The correlation degree between the die casting industry and the automobile industry is mainly concentrated on the production of the car. This structural change of China's automobile industry, which gives the die casting industry a more broad space for development.
    At the same time, in some industrialized countries, industrial structure of die casting production appeared a fundamental change, enterprise of a few die-casting experienced Association, merger and reorganization, and even some failures, and part of the enterprise will die casting production transferred to overseas, and set up another factory.
    For example, the number of die casting parts manufacturer has been decreasing year by year in the United States, but the demand of the pressure casting has not declined, especially in the automobile industry. To meet this demand, the country or by set up factories overseas production die castings, or to purchase from overseas, the target area is mainly concentrated in South America, Europe, East Asia and Southeast Asia area.
    Other countries have similar tendencies and behavior. According to foreign media reports, some of the international giants of the auto industry made it clear that the intention to buy auto parts, parts and vehicle from china. Domestic media have also reported that the purchase of foreign buyers from China to buy auto parts, from hundreds of millions to billions of dollars. This is bound to provide greater market space for the die casting industry.

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Why there are bubbles in the process of zamak die casting

    The cause of the bubble is related to the parameters of die casting process and the structure of the mold in the process of zamak die casting. Due to the pressure chamber, the gating system, the mold cavity are communicated with the atmosphere, and liquid metal is with high pressure and high speed filling, if you can not achieve the orderly and steady flow state, liquid metal produce eddy current, resulting in the air enters the mold cavity.
(1) The liquid metal can cleanly and smoothly flow in the gating system, and does not produce separation and vortex.
(2) If there was a sharp or dead zone?
(3) Does the cutting area of the gating system change?
(4) Is the location of the vent and overflow groove correct? Is it big enough? Whether it will be blocked? Can the gas discharge effectively and smoothly?
The application of computer simulation of zamak die casting filling process is to analyze the above phenomena, and to make a reasonable choice of parameters.

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The crack defect of magnesium die casting

    The crack is irregular and filamentary crack on the smooth surface of the castings. It is deep in the casting, sometimes even penetrate the entire casting. There are two kinds of crack defect of magnesium die casting is more common, one is the crack is produced under the external force, the other is the shrinkage cracks when casting shrinkage. The shrinkage crack is usually along the grain boundary, and its color is a bit dark under the microscope. The crack is produced under the external force is likely to penetrate the grain, and its color is bright under the microscope.
    The causes of the defects:
Melt containing impurities;
The protective gas is not sufficient;
Mold temperature is too low;
Improper use of release agent type;
The geometry of the die element is impaired;
The ejection position and configuration is inappropriate;
The casting geometry shape design is not good.
    Magnesium die casting have crack is often because of poor filling. Rhyolite is a potential source of crack. When casting is shrinkage or ejection, the casting will be fracture along the site of poor bonding. Some cracks appear to look like crack defects, but in fact, because of the melt flow is poor and lead to the non filling situation.

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The development direction of auto parts die casting manufacturer

     In the die casting industry some of the high technology are developed by the high requirements of the automobile industry. The auto parts die casting manufacturer should be to high-tech development. Including: power, transmission, steering, body, frame, decoration, instruments and other various system requirements of parts, some of these parts are structural parts, the mechanical parts, the safety parts, and the decoration pieces. For example: the use of whole set of 390 aluminum alloy die casting technology to produce full-aluminum cylinder block, the method of setting the cast iron sleeve in the cylinder barrel of the aluminum alloy cylinder body is abandoned. Uses the SF36 aluminum alloy manufacture automobile body frame connector, changed the automobile body traditional manufacture method. Titanium aluminum alloy (TIAI)  die casting automobile valve, opened a new field of titanium alloy die casting technology. Aluminum alloy die casting of diesel engine shell has been published in recent years.
     In recent years, the application of computer simulation technology in die casting is becoming more and more widely, which can improve the production efficiency of the die casting manufacturer, and expand the application scope of the pressure casting. Most of these techniques are first appeared in the automotive manufacturing industry. This fully reflects that the die casting process has a very broad market space in the automotive parts manufacturing industry.

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The influence of zinc die casting pouring system for filling conditions

    In die casting process, metal liquid filling type state is formed under the joint action of the factors in the pressure, speed, time, temperature, exhaust and so on. So zinc die casting pouring system with stress transfer, fund flow velocity, filling time, coagulation time, mold temperature, exhaust conditions have a close relationship.

    Stress transfer, on the one hand to ensure the metal liquid with high pressure, high speed filling cavity, on the other hand, but also to ensure liquid metal to different solidification in the flow channel and the nozzle, in order to guarantee the transmission pressure. This requires the channel and outlet design best, minimal pressure loss.

    Nozzle area is too large or too small will influence the filling process, too large gap filling speed was low, metal premature solidification, even filling not foot, too small nozzle makes the jet intensifies, increase the heat quantity loss, produce vortex streets and involved in too much gas, shortening the service life of the mold.

    Gas discharge is mainly determined in metal liquid flow moving speed and image flow direction, and row overflow system whether can make the gas discharged smoothly, exhaust area is sufficient or not. The exhaust is good or bad, will directly affect the shape and intensity of zinc die casting parts.

    Mold temperature due to the control on the casting quality is produced great influence, and impact on the production rate was efficiency, reasonable design of the nozzle can play a regulatory role on the mold temperature due to distribution.

    Mold life depends on a good steel and working state. Good zinc die casting pouring system design is to make various parts of mold heat balance in the best state, so as to get the maximum economic benefits of die casting production.

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