The invention discloses a die-
casting forming method of an aluminum
alloy shell
die casting, which relates to the technical field of forming
processing of
metal parts and comprises the following steps: selecting materials, melting and refining, carrying out die-
casting forming, shaping and trimming, refining and
machining, cleaning and decontaminating, and assembling. Through fine
polishing treatment and preheating measures, the problem of film sticking at a
sprue is remarkably relieved, effective feeding, slow injection and rapid injection are achieved, the speed of an injection punch of rapid injection is larger than 6 m / s so that the density and quality of a final
casting can be guaranteed, a cavity is divided into different temperature zones in the injection direction, staged cooling is conducted, and the casting quality is improved. The mold is opened 19-21 seconds after the cavity is filled with the raw materials, it is ensured that the casting has enough strength, deformation or damage is avoided, the high-
performance requirement of the aluminum
alloy shell of the automobile air conditioner compressor can be met, the production efficiency and the product quality can be improved, and meanwhile the influence on the environment is reduced.