As one of the die casting parts, zinc die casting is welcomed by everyone because of its good performance and wide range of functions. Today we talk about the design of zinc die casting .
The structural design of die casting is the first step of die casting work. The rationality of the design and the adaptability of the process will affect the smooth progress of the subsequent work, such as the selection of parting surface and the types of defects, etc., will be based on the pros and cons of the die casting itself.
When designing die-casting parts, to ensure the reliability of strength and rigidity, the thicker the wall, the better the performance, for die-casting parts, as the wall thickness increases, the mechanical properties decrease significantly. The reason is that in the die-casting process, when the molten metal enters the cavity at high pressure and high speed, it quickly cools and solidifies after it contacts the surface of the cavity. A layer of fine grain structure is formed on the surface of the chilled die casting. The thickness of this layer of dense fine grain structure is about 0.3, so the thin-walled die casting has higher mechanical properties. On the contrary, the crystal grains of the center layer of thick-walled die-casting parts are relatively large, which tends to produce defects such as internal shrinkage cavities, pores, and dents on the outer surface, so that the mechanical properties of the die-casting parts decrease as the wall thickness increases.
The same is true for lead die casting , not thicker the better. chinaweilong.cn