Custom Aluminium Alloy Die Casting Auto Engine Parts

 aluminium alloy die casting auto engine parts for machine, the part is a housing for auto engine system which is applied to bus, the part is a cover.in die casting process. Shrinkage is a serious problem. Should be careful. The reason for shrinkage is that the liquid density of most casting metals is slightly lower than that of solid density. This means that the volume of the metal decreases during the curing process. As long as the liquid metal can enter the casting before curing, it will minimize the shrinkage phenomenon. Unfortunately, because of the many different cross-sections of the casting, the "die hot spot" is inevitable. This part of the casting remains liquid after the other part is solidified, so it shrinks when solidified. The best way to solve the shrinkage problem is to improve the design of cavity, strengthening pressure and metal temperature. The part has request on surface finish of e-coating to satisfy the daily application, so the density of the part is important item to control, in engineering's work instruction, the operator should fracture the part and look into the section of the fracture to see if the particles is good and dense prior to production, ensure there is no big single porosity or a lot of continuous small porosity, or while e-coating, during process of curing in over under 170-200 degree temperature, the porosity existing internal will expand to get out, leading to big cosmetic issues on this part, such as b