The raw materials, extrusion pressure, pressure holding time and molding temperature during extrusion moulding have great effects on the quality of products.
挤压成型过程中原材料、挤压力、保压时间和成型温度对制品的品质影响较大。
Injection molding is one of the most important plastics moulding methods. The advantage of the method is that complicated products can be moulded one step, so it has extensive applications.
注塑成型是最重要的塑料成型方法之一，它的最大优点是可以一次成型结构复杂的制品，应用很广。
The cause and rule of warpage in the injection-moulding products was introduced. It listed the guarding measures in mold structure, molding technology and forced patterns against warpage.
介绍了注塑制品翘曲变形的原因及其规律。从模具结构、成型工艺、强制定型等方面，列下了避免翘曲变形的措施。
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