Furthermore, all thermoplastic materials contract as they solidify, which means that the molding wilt shrink on to the core which forms it. This shrinkage makes the molding difficult to remove.

 
  • 此外,所有的熱塑性塑料在固化的時(shí)候會(huì )收縮,意味著(zhù)塑件將包緊在成型的型芯上。這種包緊使得塑件難以脫下。
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