Nowadays, gas-assisted injection molding has been successfully applied to the fields of the automotive, home appliance, furniture, daily necessities, office supplies, and other fields, the main products are automotive doors, bumpers, window guides, door handles, large-screen TV shells, and integral tables, chairs, etc., enable many plastic parts that cannot be molded by normal plastic injection molding methods or are difficult to be molded, opening up a new way for plastic parts molding.