对塑料制品的评价主要有三个方面，第一是外观质量，包括完整性、颜色、光泽等；第二是尺寸和相对位置间的准确性；第三是与用途相应的物理性能、化学性能、电性能等。这些质量要求又根据制品使用场合的不同，要求的尺度也不同。制品的缺陷主要在于模具的设计、制造精度和磨损程度等方面。但事实上，塑料加工厂的技术人员往往苦于面对用工艺手段来弥补模具缺陷带来的问题而成效不大的困难局面。
The evaluation of plastic products mainly includes three aspects: first, appearance quality, including integrity, color, luster, etc.; second, accuracy between size and relative position; third, physical, chemical and electrical properties corresponding to the use. These quality requirements are different according to the use of products, and the required scale is also different. The defects of the products mainly lie in the design, manufacturing accuracy and wear degree of the mould. But in fact, the technicians in the plastic processing plant often suffer from the difficult situation of using technological means to make up for the problems caused by mold defects, but the effect is not very good