A filter head for a blow molding machine relates to the technical field of blow molding machine filters for extrusion blow-molded films. The utility model comprises a screw, the end of which is connected to a filter head, and the outer periphery of the filter head is covered with a heating ring. The inner layer of the filter head is coated with copper, and the diameter of the filter head is 25–30 cm. The utility model achieves a simple structure, improves production efficiency and enhances the safety of machine operation while increasing extrusion flow rate.

The utility model discloses a three-layer co-extrusion film blowing machine, comprising a die head, a blower and an injection molding machine with a feed hopper. The die head comprises a die head body, a hollow connecting rod and a die head base arranged at the end of the hollow connecting rod. The die head body is provided with a plurality of blow molding holes communicated with the hollow connecting rod, and the die head is also provided with exhaust holes. The blower is provided with an air outlet and an air inlet, and comprises a blowing blower with an air outlet communicated with the blow molding holes and an exhaust blower with an air inlet communicated with the exhaust holes. The arrangement of the blowing blower and the exhaust blower not only stably injects gas into the die head to expand the tubular film extruded from the annular extrusion slot, prevent film adhesion and realize rapid cooling, facilitating subsequent collection and arrangement, but also stabilizes the air pressure inside the tubular film through exhaust, making tubular film production safer and greatly improving product quality.

Area Code: CN

Nomor Aplikasi: CN200710058176.2