Shanghai Daoqin Plastics Co., Ltd.

injection molding parts 期——以定 amount plastics 充填入 mold cavity inner. plastics amount need through 实验找出, ensure in nitrogen 期间, gas 体不会 formed product surface and can has 一理想 冲 nitrogen 体积. 　　充 gas 期—— can injection in or rear, different time gas 体, gas 体注入 pressure large injection molding parts pressure, 以达至 product formed in 空状态. 　　 gas holding pressure 期——当 formed product internal by gas 体充填 rear, gas as used for formed product in separation pressure formed is holding pressure pressure, can large large decrease low formed product sink marks and deformation rate. 　　 demolding 期——随 cooling cycle formed, mold gas pressure drop large gas pressure, formed product mold cavity inner ejection.