Plastic article or earthenware shaping or treating: apparatus – Means feeding fluent stock from plural sources to common... – Extrusion shaping means
Patent
1987-03-03
1988-11-15
Chiesa, Richard L.
Plastic article or earthenware shaping or treating: apparatus
Means feeding fluent stock from plural sources to common...
Extrusion shaping means
264173, 2642092, 4251331, 425381, 425462, 428910, B29C 4724
Patent
active
047845945
ABSTRACT:
Disclosed is a single lip tubular extrusion die in which a plurality of separate melt streams passing through respective annular flow paths are fed to a common annular flow passage extending axially to and terminating at a die orifice. The annular flow passage is connected to the annular flow paths through respective groups of holes spaced annularly about the die axis. Each group of holes has its openings to the common annular flow passage spaced a different radial distance from the die axis to allow the separate melt streams to be layered in the common annular flow passage and co-extruded. One of the die lips is rotatable so that each melt stream produces a uniform layer of polymer in the extruded film while imparting a molecular orientation to the extruded film in the transverse direction (TD). An extruder-type seal may be provided adjacent a gap between a rotating and stationary part of the die to force melt attempting to penetrate the gap into the annular flow passage.
REFERENCES:
patent: 2957201 (1960-10-01), Fields et al.
patent: 3281897 (1966-11-01), Mercer
patent: 3349437 (1967-10-01), Quackenbush
patent: 3360821 (1968-01-01), Marcus et al.
patent: 3387331 (1968-06-01), Billings
patent: 3440686 (1969-04-01), Corbett
patent: 3540078 (1970-11-01), Schultz
patent: 3546743 (1970-12-01), Roth
patent: 3565985 (1971-02-01), Schrenk et al.
patent: 3590432 (1971-07-01), Schott, Jr.
patent: 3642396 (1972-02-01), Meneidis
patent: 3666389 (1972-05-01), Nelson
patent: 3713924 (1973-01-01), Fairbanks
patent: 3759647 (1973-09-01), Schrenk et al.
patent: 3768949 (1973-10-01), Upmeier
patent: 3853661 (1974-12-01), Sudo
patent: 3933960 (1976-01-01), Cameron et al.
patent: 3966861 (1976-06-01), Papesh et al.
patent: 4009975 (1977-03-01), Ninomiya et al.
patent: 4011128 (1977-03-01), Suzuki
patent: 4111630 (1978-09-01), Shiomi et al.
patent: 4176155 (1979-11-01), Heisterkamp et al.
patent: 4201532 (1980-05-01), Cole
patent: 4277594 (1981-07-01), Matthews et al.
patent: 4358330 (1982-11-01), Aronovici
patent: 4368017 (1983-01-01), Rasmussen
patent: 4403934 (1983-09-01), Rasmussen
patent: 4420451 (1983-12-01), Rasmussen
patent: 4426343 (1984-01-01), Vittone et al.
patent: 4430287 (1984-02-01), Rasmussen
Chiesa Richard L.
Gilman Michael G.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
LandOfFree
Single lip rotary tubular extrusion die does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Single lip rotary tubular extrusion die, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single lip rotary tubular extrusion die will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1101332