What are the specific characteristics of die casting mold?

Die-casting die is a method of casting liquid die forging and a process completed on a special die-casting die forging machine. Its basic technological process is: firstly, molten metal is cast at low speed or high speed and filled into the cavity of the mold, and the mold has a movable cavity surface. It is forged under pressure with the cooling process of molten metal, which not only eliminates the shrinkage and porosity defects of the blank, but also makes the internal structure of the blank reach the forged broken grains. The comprehensive mechanical properties of the blank have been significantly improved. Another advantage of die casting and die forging process is that in addition to traditional casting materials, deformed alloys and forged alloys can also be used to produce parts with complex structures. These alloy brands include: hard aluminum superhard aluminum alloy, wrought aluminum alloy, such as LY 1 1, LY 12, 606 1, 6063, LYC, LD, etc. The tensile strength of these materials is nearly twice as high as that of ordinary casting alloys, which is more positive for aluminum alloy automobile wheels, frames and other parts that want to be produced with higher strength impact-resistant materials.

1. The traditional die casting process mainly forms various complicated molded parts; High production efficiency; Parts made of other materials can be embedded in die castings; Not suitable for small batch production; The types of die casting alloys are limited. 2. Vacuum die-casting, which can mainly reduce the internal pores of die-casting parts and increase the approximate density; High die-casting hardness and fine structure; The wall thickness of machinable materials is reduced by 25% ~ 50% compared with traditional materials; The pouring and exhaust systems can be reduced; The productivity can be increased by 10%~20%3. Oxygen-filled die casting is mainly to eliminate and reduce pores; Extruded castings can work at high temperature of 200~300℃; Compared with other types of die castings, it has simple structure and convenient operation. 4. Precision speed and dense die casting mainly have low filling speed; Thick inner door; Control the sequential solidification of parts; The injection mechanism adopts double punch 5, semi-solid die casting, which is mainly composed of 50% solid content, so that the alloy shrinkage is small, and at the same time, it has good flow feeding and good casting quality; The semi-solid cavity does not flow and can basically fill the whole wall thickness; The operation is simple and convenient, and it is convenient to organize mechanized production; Can realize zero demoulding resistance and improve casting precision; Under the action of shear force, the grain is refined and the mechanical properties are improved.