Die Casting Quality Control

Die casting is a special casting method. Compared with other casting methods, the basic feature is that the liquid metal is filled and filled with high-speed and high-pressure, but due to the inherent filling of the die-casting method, the injection and the metal mold are fast. Cooling and high production efficiency damage to the die make the die casting inevitably produce a lot of defects. Some defects are related to the die casting method, some can be avoided, and some defects will not affect the die casting performance. Therefore, it does not cause castings to be scrapped, and other defects may affect the performance of the castings and become rejects. Quality is the lifeline of an enterprise, an important pillar for improving the competitiveness of enterprises, and an important condition for improving the economic efficiency of enterprises. Therefore, improving the quality of die castings is not only for the economic benefits of die-casting enterprises, but also for reducing the social benefits of resource waste. advantageous.

Die casting quality includes appearance quality, intrinsic quality, and use quality. Appearance quality refers to the surface roughness, surface quality, dimensional tolerance, shape and position tolerance, and quality deviation of the casting; internal quality refers to the chemical composition, physical and mechanical properties of the casting. , metallurgy, and holes, inclusions, and cracks that exist in the interior of the casting; quality of use means that the casting can meet various requirements for use and work performance, such as wear resistance, corrosion resistance, and machinability, weldability, etc. . The direct cause of die casting defects can be summarized as the following:

1) Unsuitable casting structure design 2) Mold and die-casting scheme small correct 3) Incorrect material and smelting 4) Incorrect die-casting machine and die-casting process 5) Inappropriate casting operation (manual operation)

In addition, due to management reasons, such as production organization, on-site management quality management, etc. are not perfect, the operator's negligence and responsibility are also the indirect causes of die-casting defects.