What are the advantages and disadvantages of die casting?
2023-06-08
advantage
The advantages of die casting include that the castings have good dimensional accuracy. Usually, this depends on the casting material, with a typical error of 0.1 millimeters for a 2.5 centimeter size, and an increase of 0.002 millimeters for every 1 centimeter increase in error. Compared to other casting processes, its casting surface is smooth and the fillet radius is approximately 1-2.5 microns. Compared to sandbox or mold casting methods, castings with a wall thickness of approximately 0.75 millimeters can be manufactured. It can directly cast internal structures, such as wire sleeves, heating elements, and high-strength load-bearing surfaces. Other advantages include its ability to reduce or avoid secondary mechanical processing, fast production speed, casting tensile strength up to 415 megapascals, and the ability to cast high fluidity metals.
shortcoming
The disadvantage of die casting is its high cost. Casting equipment, molds, and related components are relatively expensive compared to other casting methods. Therefore, it is more economical to produce large quantities of products when manufacturing die castings. Other drawbacks include that this process is only suitable for metals with high fluidity, and the casting quality must be between 30 grams and 10 kilograms. In typical die casting, the subsequent batch of castings will always have pores. Therefore, no heat treatment or welding can be carried out because the gas inside the gap will expand under the action of heat, resulting in internal micro defects and surface peeling.
