underexposure

It summarized the common defect of the plastic products, and analyzed reason and improvement method that leads to the plastic products with insufficient injection, flying- away, fragility and sunken shrink, it made great directive significance on produce actually.

总结塑料制品的常见缺陷,并分析造成塑料产品注射不足、飞边、发脆、收缩凹陷的原因及改进方法,对实际生产有很大的指导意义。