As the global economy continues to develop, society's demand for a wide range of products is becoming increasingly personalized.

One of the common defects of die castings is shrinkage cavities (shrinkage, porosity). 

Plastic injection molding inherently shrinks because the density of the polymer changes when the process temperature drops to room temperature, causing shrinkage. The difference in shrinkage of the entire plastic part and the cross section will cause internal residual stress, which has the same effect as external force.

The metal wire drawing process is to grind the material, perform mechanical movement back and forth on the metal surface, and chemically corrode it, so that the surface of the workpiece has a layer of macro texture with uniform thickness distribution.

Sheet metal bending is one of the basic processes in sheet metal manufacturing and is also a basic operation for manufacturing sheet metal stampings. Sheet metal bending means deforming the workpiece, applying force to the workpiece with the help of a sheet metal bending machine to form it into a certain desired geometric shape. The process is not as simple as it seems, there are some dimensions and rules that need to be met, for example, the material of the product needs to be checked, the K factor needs to be calculated, the shape of the metal processing, and so on.

With the explosive growth of new energy vehicles, the electric drive system is the most critical system of the entire electric new energy vehicle. Its efficiency, weight and cost directly determine the competitiveness of the vehicle. However, industry discussions often focus on motor design and battery energy density, but rarely mention a key link - die-casting process.

During the melting and plasticizing process of plastic, the molten material continuously moves to the front end of the barrel (inside the metering chamber), and more and more, gradually forming a pressure to push the screw backward.

 At present, Our country still has a structural shortage of chemical products. Coupled with the rapid growth in demand for high-end plastics in the automotive industry, the electronics and electrical fields, the construction pipe field, and the daily packaging field [1],

Polymer foams, especially soft polymer foams, have been widely used in a wide range of industrial applications. The demand for customer-specific foam structures is growing, especially in applications such as aerospace, biomedical, semiconductor and automotive industries.