Plastic article or earthenware shaping or treating: apparatus – Including means advancing continuous length work through...
Patent
1997-12-29
2000-09-12
Kuhns, Allan R.
Plastic article or earthenware shaping or treating: apparatus
Including means advancing continuous length work through...
425 73, 425140, 425141, 425325, B29C 4788, B29C 4792
Patent
active
061168823
ABSTRACT:
An extrusion system utilizes single or tandem extruders and a mixer-cooler to extrude a foamable extrudate through a die in a sealable chamber. The foamable extrudate is shaped and calibrated within the chamber. The die is mounted on the end of a gel tube projecting through a gland seal in a fixed bulkhead forming the upstream end of the chamber. The gel tube and mixer-cooler are mounted on a movable carriage, movement of which may be used to adjust the die with respect to shaping and calibrating equipment inside the chamber. The mixer-cooler achieves a selected narrow range of uniform viscosity of the melt at the die depending on the size of the product and density. The chamber is preferably a vacuum chamber producing low density foams. The product exits the chamber to atmosphere on a continuous basis through a submerged orifice in a water baffle immersion seal. The mixer-cooler enables a large size low density product to be produced with uniform cellular structure without cell collapse or density gradients, as the product is subjected to the pressure and temperature transformations passing from the chamber to atmosphere through the water. The seal includes the submerged orifice with a free wheeling guiding system upstream of the orifice. Immediately ahead of the guiding system, the parameters of the foam extrudate are sensed to control the configuration of the orifice on a continuous basis. Before the extrudate passes into the water baffle seal it moves over a floating dancer roll, the position of which controls a haul-off such as a vacuum belt at the tail end of the system. This avoids pushing on the extrudate.
REFERENCES:
patent: 2083557 (1937-06-01), Crane et al.
patent: 2191658 (1940-02-01), Haux
patent: 2256483 (1941-09-01), Johnston
patent: 3295163 (1967-01-01), Bachus
patent: 3378887 (1968-04-01), Reib et al.
patent: 3428726 (1969-02-01), Moss
patent: 3558753 (1971-01-01), Edlin
patent: 3704083 (1972-11-01), Phipps
patent: 3813200 (1974-05-01), Gergely
patent: 4000402 (1976-12-01), Higham
patent: 4234529 (1980-11-01), Phipps
patent: 4371488 (1983-02-01), Phipps et al.
patent: 4395214 (1983-07-01), Phipps et al.
patent: 4428896 (1984-01-01), Stevenson
patent: 4454082 (1984-06-01), Cisar et al.
patent: 4469652 (1984-09-01), Cisar et al.
patent: 4585603 (1986-04-01), Furuta et al.
patent: 4626183 (1986-12-01), Shirari et al.
patent: 4783291 (1988-11-01), Pagan
patent: 5120481 (1992-06-01), Brackman et al.
patent: 5236325 (1993-08-01), Groblacher et al.
patent: 5340295 (1994-08-01), Preiato et al.
patent: 5346379 (1994-09-01), Wolfl et al.
patent: 5753161 (1998-05-01), Lightle et al.
patent: 5783122 (1998-07-01), Sadinski
Lincoln, Jr. Robert M.
Sadinski Robert L.
Woodburn Russell C.
Chi Anthony R.
Eckert Inger H.
Kuhns Allan R.
Owens Corning Fiberglas Technology Inc.
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