Gas auxiliary molding device

The utility model relates to a gas auxiliary molding device. The gas auxiliary molding device comprises a gas needle main body, and is characterized by also comprising a forwarding part which is arranged on one end of the gas needle main body and matched with the end surface of the gas needle main body, an air passage which is used for the passing of airflow is arranged in the gas needle main body, one end of the air passage runs through one end part of the gas needle main body and is connected with an air inlet passage through a valve, the other end of the air passage runs through the end part with the forwarding part of the gas needle main body. When the gas auxiliary molding device is in work, a front mold and a rear mold are compounded, the material is fed through a feeding opening, after the injection molding is completed, the injection molding is stopped, the forwarding part stretches into a product, the valve is switched on, the product is filled with gas through the air passage under the air pressure,