Film-blowing plant for manufacturing plastic films

Plastic article or earthenware shaping or treating: apparatus – Shaping orifice and downstream work contacting gaseous...

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425141, 4253261, B29C 4788

Patent

active

055629261

ABSTRACT:
A film blowing plant for manufacturing plastic films from thermoplastics, having a blow head, above which is disposed an air cooling ring (1) and behind it in the direction of movement of the film a measuring device for the film thickness, whereby the cooling capacity across the circumference of the tube can be controlled variably by altering the throughput quantity of the air cooling ring (1) and respective adjustment in every region is controlled according to the measurement values of the measuring devices, and the air cooling ring (1) has openings (4) distributed across the circumference in front of air outlet (2) in the region of and in the flow direction of the air (3), through which air is supplied or released.

REFERENCES:
patent: 4118453 (1978-10-01), Herrington
patent: 4373273 (1983-02-01), Church
patent: 4399094 (1983-08-01), Fujitani et al.
patent: 4443400 (1984-04-01), Herrington
patent: 4472343 (1984-09-01), Kawamura et al.
patent: 4624823 (1986-11-01), Audureau et al.
patent: 4826414 (1989-05-01), Planeta
patent: 5281375 (1994-01-01), Konermann

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