At present, aluminum alloy is the most widely used alloy, and it has been widely used in aerospace, automobile, communication, machinery manufacturing, shipbuilding and chemical industries. , The surface of the casting is not allowed to have cracks, cracks, under-casting, shrinkage and any penetrating defects.

So what factors are related to aluminum alloy casting? All casting factors in the casting process, alloy heating temperature, mold temperature, molding complexity, gate riser system and gate shape, etc., will affect the molding of aluminum alloy die castings.

Here, take the common die-casting defect pores as an example, and briefly analyze the causes of die-casting defects.

Analysis of the reasons for the formation of pores in aluminum alloy die-casting. The first is the poor refining and degassing. The casting temperature of molten aluminum is generally around 600 degrees. At this temperature, the liquid hydrogen content is about 20 times that of the solid hydrogen content. Then, in the process of condensation in the aluminum industry, a large amount of gas will be generated, which needs to be released, so a large number of irregular pores will appear, which is the role of aluminum liquid refining and degassing.

The second possible reason is the pores caused by poor exhaust. For the pores caused by poor exhaust, the exhaust channel of the mold should be improved, and the exhaust of the mold should be cleaned in time, so that the residual aluminum skin on the channel can be avoided.

Aluminum alloy die-casting will also have shrinkage pores. Aluminum alloy shrinks during solidification. The higher the casting temperature, the greater the shrinkage. The pores caused by volume shrinkage exist in the final solidification part of the alloy, in an irregular shape, and in severe cases. mesh. Often in the product, it exists at the same time as the pores due to hydrogen evolution during solidification. There are shrinking pores around the hydrogen evolution pores or coil pores, and there are filamentous or mesh pores extending to the outside around the bubbles.

Finally, there is the problem of pores caused by excessive wall thickness difference of the product. The shape of the product often has the problem of excessive wall thickness difference. The center of the wall thickness is the place where the molten aluminum solidifies at the end, and it is also the most prone to pores. In the production process, it is necessary to fully Consider the casting temperature and cooling rate of the thick and large parts, and the mold design should consider spot cooling and increase the cooling amount.

In order to solve the problems that may occur in the process of aluminum alloy die-casting, it is necessary to use an aluminum alloy die-casting mold temperature machine to control the temperature of the die-casting parts. The aluminum alloy die-casting mold temperature machine can preheat the mold and reduce the mold surface and Internal temperature gradient to prevent mold failure due to cracking caused by abnormal temperature.

The aluminum alloy die-casting mold temperature machine preheats the mold and maintains the temperature of the mold in the initial production and production gap, reducing the hot mold time, saving energy consumption, speeding up the production progress, and improving efficiency. During the production process, the mold temperature is kept constant (heating and cooling), which can keep the size and density of the die casting stable and ensure the stability of the product quality.

Due to the heating and cooling effect of the aluminum alloy die-casting mold temperature machine, the amount of release agent used can be reduced, and the chilling of the mold can be reduced, thereby reducing the generation of thermal stress, delaying the generation of cracks on the surface of the mold, thereby prolonging the service life of the mold. It can reduce the use of cooling water, prolong the life of the mold, save the die-casting cycle, and also have a certain inhibitory effect on the product sticking to the mold, aluminum sticking and strain, improving the appearance of the product and reducing the generation of defective products.