The development of China's plastic mold industry is increasingly larger and higher precision

At present, China's plastic mold industry is becoming larger and more accurate. Ten years ago, the accuracy of precision plastic molds was generally 5 μm, which is now 2-3 μm. Soon, 1μm precision molds will be available. With the miniaturization of parts and the improvement of precision requirements, the precision tolerance of some molds is required to be less than 1μm, which requires the development of superfinishing.

Experts believe that China's plastic mold industry to further develop multi-functional composite mold, a set of multi-functional mold in addition to stamping molding parts, but also assume the overlap pressure, tapping, riveting and locking and other assembly tasks. The production of this multi-functional mold is no longer a batch of parts, but a batch of components, such as the assembly of contacts and bearings, core assemblies of various tiny motors, electrical appliances, and meters. Multi-color and multi-material plastic forming molds will also develop rapidly. This mold shortens the production cycle of the product and will be developed and applied in different fields in the future.

With the increasing application of hot runner technology, the proportion of hot runner molds in plastic molds will gradually increase. The use of hot runner molds can increase the productivity and quality of parts, and can significantly save the raw materials of the parts. The application of this technology has developed rapidly in foreign countries and has become very common. Domestic hot runner molds have also been produced. Some companies have reached about 30%, but in general, the ratio is too low to be developed. With the continuous improvement and development of plastic molding technology, gas-assisted molds and molds that adapt to the high-pressure injection molding process will develop along with it.

Relevant experts believe that the application of mold standard parts will become increasingly widespread. Mold standardization and the application of mold standard parts can greatly affect the mold manufacturing cycle. The use of standard mold parts can not only shorten the mold manufacturing cycle, but also improve mold quality and reduce mold manufacturing costs. At the same time, the prospects for rapid economical molds are very broad. Because people require that the production cycle of the mold is as short as possible, the rapid and economical development of molds has attracted increasing attention. For example, various superplastic materials are developed to make molds; simple molds are made of epoxy, polyester, or fillers such as metal and glass. The manufacturing process of this type of mold is simple, the precision is easy to control, the shrinkage is small, the price is low, and the lifetime is high. Cement and plastic can also be used to make car cover molds. Medium and low melting point alloy molds, spray forming molds, electroform molds, precision molds, laminated molds, ceramic molds, and light molds and the use of heat-hardening rubber to rapidly manufacture low-cost molds and other rapid economic molds will further develop. Quick-change mold holders, quick-change punches, etc. will also grow. In addition, computer-controlled and manipulator-operated rapid mold changing devices and rapid mold testing device technologies will also be developed and improved.

Experts believe that the proportion of die-casting molds in the mold industry will continue to increase. With the development of products such as vehicles and motors in the lighter direction, higher and higher requirements will be placed on the number, lifespan, and complexity of die casting molds. With the continuous improvement of the development of plastic substitute steel, the development of plastic substitute wood, and the precision and complexity of product parts, the proportion of plastic molds will continue to increase, and its accuracy and complexity will also increase accordingly.

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