The exhaust of the injection mold is an important problem in the design of the mold, especially in the rapid injection molding, the exhaust requirement of the injection mold is more strict
1. Air stored in the casting system and mold cavity.
2. Some raw materials contain water which has not been dried out and which is vaporized into steam at high temperatures.
3. Gas generated by decomposition of some unstable plastics due to high injection temperature.
4. Some additives in plastic raw materials volatilize or react with each other to produce gases