According to the production process of plastic products, plastic machinery can be divided into four categories: plastic mixing machinery, plastic molding machinery, plastic secondary processing machinery and plastic processing auxiliary machinery or devices. Plastic mixing machinery used in various forms of plastic mixing material manufacturing, including kneading machine, plastic refining machine (open refining machine and refining machine), granule cutter, screening machine, crusher and grinder, etc.. Plastic molding machinery, also known as plastic primary processing machinery, used for plastic semi-products or product molding, including compression molding machine, injection molding machine, extrusion molding machine, blow molding machine, calendering machine, rotomolding machine, foaming machine and so on. Plastic secondary processing machinery for plastic semi-products or products reprocessing and post-processing, including thermoforming machines, welding machines, thermal laminating machines, hot stamping machines, vacuum evaporation machines, flocking machines, printing machines and so on. Metal processing machine tools are also commonly used in the secondary processing of plastics. Plastic processing auxiliary machinery or devices used to achieve the rationalization of the plastic processing process, including automatic metering and feeding devices, automatic recycling of edge materials, automatic injection molded products out of the device, injection mold rapid replacement device, injection mold cooling machine, automatic thickness measurement device, as well as raw materials, such as conveying and storage equipment. This kind of auxiliary machinery or device, has become a modern plastics processing process automation indispensable part.
The degree of perfection of the plastic machinery directly affects the quality of plastic semi-finished products or products, production and cost, and therefore must be able to adapt to the plastic mixing and processing of temperature and stress changes, as well as the resulting changes in the performance of the molten material and adapt to the chemical corrosion and mechanical abrasion and other special conditions. Plastic grade specialization, the development of engineering plastics, the emergence of composite materials, plastic products, large-scale structure, lightweight and thin-walled and other technological developments require plastics machinery to achieve: for the purpose of the production of products and complete sets of; high-speed, labor-saving, automation, in order to improve the efficiency of the production of products; to ensure that the product specifications and quality of the smallest possible degree of precision; low energy consumption, occupies an area of less, easy to maintain the operation and safety.