The mold used for stretching is called a stretching die, which is a specialized tool for batch processing materials (metal or non-metal) into the required stamping parts. If the types of drawing dies are distinguished by combination, they can be divided into single process drawing dies, composite dies, and progressive drawing dies. Distinguished by stamping equipment, it can also be divided into drawing dies for single action presses, drawing dies for double action presses, and drawing dies for triple action presses

There are many types of products in the mold industry, among which the drawing die belongs to a type with higher technical content. Due to the following difficulties, it is difficult to stretch the mold: 1. Design and calculation; 2. Mold testing after mold design is completed. For designers, to design a reasonable stretching mold structure, they need to accumulate rich design experience.

Cracks at corresponding parts of punch shoulder: due to insufficient strength of the material, this defect will occur when the drawing load reaches the material breaking load. The defect occurs at the corresponding part (rp) of the shoulder R of the punch, which is closer to rp than the impact mark line. The impact mark line of the ruptured part can be observed and checked for the following situations, as it is different from other parts: or it can be extended; Or there are shiny parts above and below the flange; Or wrinkles may occur. In addition, there are sometimes shiny parts on the side walls. Initially, it ruptured laterally and presented as a tongue like shape.

Home appliance industry: control decorative panels for rice cookers, washing machines, microwaves, air conditioners, refrigerators, etc; Automotive industry: instrument panel, air conditioning panel, interior parts, headlight housing, logos, etc; Electronics industry: MP3, MP4 machines, computers, VCDs, DVDs, electronic notepads, cameras, and other decorative covers and signs; Computer industry: keyboard, mouse cover;

Precision injection molding, strictly speaking, refers to the dimensional accuracy of plastic products produced through injection molding machine equipment, which can reach below 0.01mm, usually between 0.01-0.001mm in size. Precision injection molding is mainly used in industrial and civilian products such as aerospace, automotive components, precision instruments, sports equipment, testing tools, etc.

There are various types and complex shapes of precision stamping parts for automobiles, and some adverse phenomena often occur during stamping production. The middle cover bracket is a key load-bearing connector of the integrated dashboard assembly in the car cab, and is an important component to ensure the stable and reliable use of various automotive instruments.