塑料模具毕业英文翻译.doc

塑料模具毕业英文翻译
1、Plastic Part Manufacturability
The design of plastic parts is largely determined by its purpose,functionality,and plastic parts are made with injection molding..The molding process has its own unique features and ,the manufacturability lf each part design must be thoroughly considered for its economics,as well as its application and aesthetic each mold designer,it is critical to acquire a basic understanding of the plastic part design.
1塑件的结构工艺性
塑料结构优件的设计是由它的用途、性能以及外观要求决定的,但是由于塑件大多是由塑料模注射成型的,在塑件成型过程中,有它独特的工艺特点,所以,在设计塑料结构件时,应充分考虑塑料成型工艺的特点,才能设计出既满足使用性及外观要求,又能高效低耗成型的塑件。而对于模具设计者来说,详细了解设计塑料结构件的基本常识是十分必要的。
(1)Plastic Part Dimensional Accuracy
Plastic parts are molded under elevated temperature,Their dimensional accueacy is affected by accuracy of the mold and shrinkage of the plastic material,which is affected by the following factors:
1) Each plastic material has a unique shrinkage rate,which may further vary by its
manufacturer,batch number,and water and volatile contents.
2) During the injection molding process,the change in the injection conditions such as
injection force,time,and temperature all directly affect its
example,plastic parts usually shrink less at a higher injection pressure.
3) The wall thickness and shape of plastic part also afficts its example,the
plastic part with athin wall shrinks less.
4) The mold structure also directly affects plastic part’s larger gate size
leads to a small flow leads to a larger it can be seen
that the shrinkage of plastics is unstable,which shall inevitably influence the
dimension precision of plastic this factor as well as other
complications such as the draft,the flash on parting line and the abrasion lf molding
parts etc,it is unnecessary to select high dimension precision when designing plastic
structural parts if not need be.
mend