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The reason of affecting the quality of die casting

Time : 2020-06-04 Hits : 77

The continuous development of science and technology, the requirements for die-casting products are getting higher and higher. From the safety and aesthetics have high requirements. The control of the surface temperature of the die-casting mold is very important for the production of high-quality die-casting parts. Uneven or inappropriate mold temperature will also lead to instability of the casting standard. During the production process, the casting is deformed, and defects such as thermal pressure, mold sticking, external depression, internal shrinkage cavity and thermal bubble occur. When the mold temperature difference is large, the variables in the production cycle, such as filling time, cooling time and spraying time, have different degrees of influence.

  Some die castings are not formed, and the cavity is not full

  Factors: 1. The temperature of the die-casting mold is too low; 2. The temperature of the molten metal is low; 3. The pressure of the press is too low; 4. The lack of molten metal and the injection speed are too high;

  Adjustment methods: 1. 2. Improve the die casting mold and the temperature of the molten metal; 3. Replace the high pressure die casting machine. 4. Add sufficient liquid metal to reduce the injection speed and increase the thickness of the feed inlet.

   1. The planning of die-casting parts. At the time of planning, extra attention should be paid to making the structure of die-casting parts as simple as possible under the premise of using the request. Otherwise, the shortcomings of die castings such as pits, pores, and cracks are simply presented. The standard requirements for Shenzhen aluminum die-casting are accurate and reasonable. Otherwise, it will cause unnecessary trouble for the planning and management of mold planning and processing. Many unqualified products will be produced.

   2. The structure of the mold, the processing accuracy and the selection of the mold data are also meticulous: aluminum alloy die casting is die-cast by the mold, and the selection of the mold data is also greatly related to the quality of the product. The mold structure is not good enough, and it is difficult to pass the product even if the measures are adopted technically.

3. The reduction rate of casting data: When the reduction rate of casting data is usually given as a uniform percentage or as a percentage with a certain change in scale, special attention should be paid to the timing of high-precision die casting planning molds. It is necessary to make an experimental mold first . After obtaining the data on the experimental mold, plan to manufacture molds for many productions.

   4. Preparation and implementation of technology: The preparation of die-casting technology is determined by the technical level of the operator, the quality of the mold and die-casting equipment. Nowadays, it is difficult for China to control the technical parameters of die-casting under the condition of die-casting equipment, which is stable, reliable and accurate.

Die casting is a part of pressure casting. It is a pressure casting mechanical die casting machine equipped with a casting mold. The copper, zinc, aluminum (aluminum alloy) and other metals heated to a liquid state are poured into the inlet of the die casting machine. Machine die casting, casting copper, zinc, aluminum (aluminum alloy) parts with limited shapes and sizes of the mold.


Professional manufacturer of zinc alloy die casting: Hoshimoto CO.,Ltd    www.hoshimoto-sh.com

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