The size of the global plastic parts market is stable between 2019 and 2022, with little change; the forecast for the next 6 years starting from 2022 has a larger frequency of growth and scope of use. Especially for plastic products made of PU and PP materials, the demand growth rate is higher.

The quality of the craftsmanship of plastic parts is not only related to whether the plastic parts are successfully formed but also related to the quality of the products and whether the structure of the plastic mold is economical and reasonable.

The craftsmanship of plastic parts mainly depends on product design. When designing plastic parts, it must not only meet the requirements of use, but also meet the characteristics of the molding process, and simplify the mold structure as much as possible; it can not only ensure the smooth implementation of the molding process but also improve product quality, It can improve productivity and reduce costs.

When designing plastic parts, we must fully consider the following factors:

(1) Different molding methods have different technological requirements for their products. The following focuses on the technological requirements of compression molding and injection molding products.

(2) Plastic molding process properties such as fluidity, shrinkage, etc.

(3) The use performance of plastics the size, tolerance, and structural shape of plastic parts should be adapted to the physical properties and mechanical properties of plastics. On the premise of ensuring performance, we strive to have a simple structure, uniform wall thickness, and convenient use.

(4) The mold structure and the shape of the processed plastic parts should be conducive to simplifying the mold structure, and the processing technology of the mold parts, especially the molded parts, should be considered.

The technological design of plastic parts includes four aspects: plastic material selection, dimensional accuracy, surface roughness, and the structure of plastic parts.