Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1976-01-29
1978-03-07
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
264180, 425 71, D01D 300, D01D 508
Patent
active
040780333
ABSTRACT:
Process for cooling a freshly extruded, incompletely solidified foil of a thermoplastic polymer by extruding said foil into a liquid cooling bath and directing against said foil below the bath surface along a line extending the entire width of said foil at least one narrow, unbroken stream of cooling liquid. The stream(s) respectively are directed angularly against a side of said foil at right angles thereto or in a direction opposite to the direction of movement of said foil into said bath, i.e., at an angle between 0.degree. and 60.degree. relative to a plane which is normal to said foil. The apparatus embodies an extrusion nozzle for extruding the foil downwardly into a body of cooling liquid in a tank directly below said nozzle. One or more tubes are normally immersed in said body of liquid and extend longitudinally parallel to and in juxtaposition to the foil entering said body of cooling liquid and also parallel to the upper surface of the cooling liquid. The tube(s) have a longitudinal slit which faces the foil and is at least substantially coextensive with the width of nozzle and the width of the foil extruded therefrom, and a pipe within each tube to supply a cooling liquid to each tube, such pipe(s) being at least substantially coextensive with the slit and extending longitudinally inside said tube(s) in spaced relationship thereto. Such pipe(s) have a plurality of liquid discharge holes directed toward the side of the tube(s) which is directly opposite to said longitudinal slit.
REFERENCES:
patent: 2324397 (1943-07-01), Hull
patent: 3729539 (1973-04-01), Hill
patent: 3886243 (1975-05-01), Uemura et al.
patent: 3932576 (1976-01-01), Patel
Braun Siegfried
Czerwon Dieter
Ruppel Friedrich
Barmag Barmer Maschinenfabrik Aktiengellschaft
Woo Jay H.
LandOfFree
Processes and apparatus for liquid bath cooling of extruded foil does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Processes and apparatus for liquid bath cooling of extruded foil, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processes and apparatus for liquid bath cooling of extruded foil will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2020596