塑料机械的完善程度直接影响塑料半制品或制品的质量、产量和成本，因而必须能适应塑料配混和加工过程的温度和应力的变化，以及由此而引起的熔融物料性能变化，并适应化学腐蚀和机械磨损等特殊条件。塑料品级的专用化，工程塑料的发展，复合材料的出现，塑料产品结构大型化、轻量化和薄壁化等技术的发展要求塑料机械达到:针对制品生产目的而成套化;高速、省力、自动化，以提高制品生产效率；保证产品规格和质量误差最小的精密程度；能耗低，占地少，操作维护便易而安全。
The perfection of plastic machinery directly affects the quality, output and cost of plastic semi-products or products. Therefore, it must be able to adapt to the changes of temperature and stress in the mixing and processing of plastics, and the changes of properties of molten materials caused by them, and to adapt to the special conditions such as chemical corrosion and mechanical wear. The specialization of plastics grade, the development of Engineering plastics, the emergence of composite materials and the development of large-scale, lightweight and thin-walled plastic products require that plastic machinery should be set up for the purpose of product production, high-speed, labor-saving and automation to improve the production efficiency, ensure product specifications and quality errors. Minimum precision, low energy consumption, less land occupation, easy and safe operation and maintenance.