Plastic Injection Mold, Injection Mold Maker, Mold Parts, JinHong Plastic Mold Factory

① The material entrained gas in the feed system or the air originally stored in the cavity, and the gas in the runner and cavity is not discharged in time during the forming process.

②The resin is not sufficiently dried and contains water, which evaporates to become water vapor at the injection temperature.

③The injection temperature for Injection plastic mold is high, and the plastic decomposes to produce gas.

④ Some additives in the resin volatilize or chemically react to generate gas (for example, when thermosetting plastics are formed, not only the plastic itself contains water and volatile components, but also condensation reaction occurs during the curing process to produce condensation water and low-molecular volatile gases).

⑤ Residual gas in the resin.