A film blowing device for packaging bags

Abstract

This utility model discloses a blown film device for packaging bags, relating to the field of packaging bag production technology. The utility model includes an extruder and a material inlet pipe installed at the extruder's discharge end. A middle component is bolted to the top of the material inlet pipe, and a blown film block is installed inside the middle component. The blown film block has symmetrical air inlet and outlet channels. A horizontally arranged air inlet pipe is fixed to the bottom of the air inlet channel, and an extension pipe is fixed to the top of the air inlet channel, extending upwards into the blown film. A horizontally arranged return air pipe is fixedly connected to the bottom of the outlet channel. In this utility model, while maintaining the pressure required for blown film, some hot air can be discharged, thereby improving the film's cooling effect. Simultaneously, cooling water can exchange heat with the film, and the cooling water is atomized and sprayed onto the film through an atomizing nozzle, further accelerating the film's heat dissipation effect and enabling rapid film drying for easy collection.

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