Large Part Injection Molding with Nitrogen

Nitrogen assisted alternatives to high pressure injection molding of large pieces are explored- Structural Foam, Counterpressure, Gas Assist, and External Gas Molding. Plastic flow and resin shrinkage are considered. There is something about bubbles of…

Counterpressure Structural Foam

Counterpressure Structural Foam is a variation of the structural foam process. The purpose is to control the pressure drop at the leading edge that occurs during resin injection. Normally the pressure drop allows the blowing…