The key to precision injection molding lies in precision, which requires strict control of dimensional accuracy and uniformity of plastic components. It has broad applications in the field of plastic component manufacturing with high requirements. However, due to the high manufacturing requirements of molds, China can only meet 50% of market demand, and the other 50% rely on foreign imports. Only a few manufacturers have this manufacturing technology. It is not easy to make precision injection molding molds, and many technical difficulties need to be overcome.

For example, how to solve the deformation problem in the injection molding process, how to reduce shrinkage rate errors, and in the process of a batch of injection molding molds, overflow, demolding deformation, and injection molding deformation often occur, making it difficult to achieve sufficient precision in production. Precision injection molds can solve the above defects, ensure size and tolerance, and reduce the production cycle and cost of precision plastic products, Bringing good promotion and improving overall economic benefits for some manufacturers.

Measuring the precision of plastic products requires starting from four aspects, including surface roughness, dimensional tolerance, behavioral tolerance, and fullness. In order to meet these four requirements, it is necessary to coordinate materials and molds, including injection molding technology, plastic materials, equipment, and precision injection molds. In addition to having high requirements for molds, the purity and mechanical properties, physical properties, and chemical properties of engineering plastics must all meet the standards, Ensure dimensional stability and resistance to environmental stress cracking.

After heating and dissolving high-quality engineering plastics, they are fed into metal molds. During the process, the temperature of the mold needs to be controlled. There are cooling holes and heaters on the precision injection mold, which can flexibly control the temperature. The plastic evenly adheres to the inner wall of the mold. After the cooling process, the mold can be opened and the demolding process is completed through the ejection device. The product must have precision, good mechanical properties, and color stability, Flow performance, etc.

Ultimately, precision injection molds are also one of the varieties of injection molds, with higher requirements for parameter performance, raw materials involved, processing technology, and design. China can almost manufacture the vast majority of injection molds, but there are still difficulties to overcome in the field of precision injection molds. Currently, half of the products come from abroad, and although some excellent domestic manufacturers can produce them, they are not comprehensive, It takes 3-5 years to overcome difficulties and complete the closed-loop of the entire industrial chain.

In the field of medical device production and high-precision electronic product production, precision injection molding molds are needed to control the weight, accuracy, and quality of finished products. Only with high-precision molds, high-performance injection molding machines, and good engineering materials can we meet the needs of manufacturers. In other words, only mold manufacturers can make efforts, equipment manufacturers, and engineering plastic manufacturers are needed, The mold manufacturer cooperates with all three parties.