Apparatus for the production of a tubular film from thermoplasti

Details Apparatus for the production of a tubular film from thermoplasti Apparatus for the production of a tubular film from thermoplasti

1990-06-12

1992-04-07

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

4253261, 4253871, B29C 4788

Patent

active

051023202

ABSTRACT:
An apparatus for the production of a tubular film from thermoplastic material which is thermoplasticized in an upstream extruder. The apparatus includes a die-head, an annular die for the continuous extrusion of a thermoplasticized plastic tube, a device for inflating the plastic tube to a tubular film bubble which is continuously hauled-off, and a cooling air cooling device for internal cooling of the tubular film bubble above the annular die. The cooling air cooling device includes a cooling unit and a circulating unit for the cooling air. The cooling air cooling device has an annular cooling chamber which is provided with a die bottom shaped to conform to the tubular film bubble for the exhaust of the cooling air. The cooling unit includes a heat exchanger with which the circulating unit is combined. The heat exchanger on the one hand is in connection with the interior of the tubular film bubble and is connected on the other hand to a channel system leading to the annular cooling chamber.

REFERENCES:
patent: 3445891 (1969-05-01), Thordarson
patent: 3488809 (1970-01-01), James
patent: 4080143 (1978-03-01), Upmeier
patent: 4115048 (1978-09-01), Alderfer et al.
patent: 4176155 (1979-11-01), Heisterkamp et al.

Affiliated with

Also associated with

Rating

Apparatus for the production of a tubular film from thermoplasti does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for the production of a tubular film from thermoplasti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for the production of a tubular film from thermoplasti will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1891932