Process and apparatus for cooling extruded thermoplastic film

Details Process and apparatus for cooling extruded thermoplastic film Process and apparatus for cooling extruded thermoplastic film

1991-02-13

1992-02-25

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

26421113, 264216, 425 721, 425224, 4253781, B29C 4788

Patent

active

050911341

ABSTRACT:
Air is blown on the surface reverse to a cooling drum of the thermoplastic resin film extruded onto the cooling drum. The air is decelerated and is continuously varied in the velocity. An air nozzle to blow air on the surface reverse to a cooling drum of the thermoplastic resin film extruded onto the cooling drum, not less than two air supply openings disposed along the circumferential direction of the drum and a reduction filter covering the air supply openings are provided. The cleaning times of the air nozzle can be reduced, and the thermoplastic resin film is always held in an excellent quality.

REFERENCES:
patent: 3141194 (1964-07-01), Jester
patent: 3159696 (1964-12-01), Hodgson, Jr.
patent: 3502757 (1970-03-01), Spencer
patent: 3709964 (1973-01-01), DeGeest et al.
patent: 4255365 (1981-03-01), Heyer

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