Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1994-05-31
1996-01-23
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
264349, 425204, 425208, B29C 4746, B29C 4750
Patent
active
054863287
ABSTRACT:
An apparatus and method for extruding an elastomeric polymer which is subject to periodic pressure surges. The apparatus includes a barrel having an upstream portion and a downstream portion, a hopper positioned for delivering polymer to the upstream portion of the barrel, a shaft rotationally mounted within the barrel and a drive means for rotating the shaft. The shaft has a conveying screw flight for conveying polymer downstream from the hopper through the barrel. The barrel has a discharge port located downstream of the hopper. A surge suppressor is provided on the shaft for reducing the pressure and flow rate surges in the polymer. The surge suppressor includes a screw flight downstream of the discharge port for urging the polymer upstream toward the discharge while permitting a portion of the polymer to flow downstream into the surge suppressor. A polymer seal is provided downstream of the surge suppressor.
REFERENCES:
patent: 3023455 (1962-03-01), Geier et al.
patent: 3632256 (1972-01-01), Kasting et al.
patent: 3666386 (1972-05-01), McElroy et al.
patent: 3712776 (1973-01-01), Woodham et al.
patent: 3787160 (1974-01-01), Leister
patent: 3797550 (1974-03-01), Latinen
patent: 3802670 (1974-04-01), Okada et al.
patent: 3856278 (1974-12-01), Eisenmann
patent: 3924841 (1975-12-01), Shinmoto
patent: 3954366 (1976-05-01), Fields
patent: 4118163 (1971-10-01), Lee
patent: 4173445 (1979-11-01), McKelvey
patent: 4465451 (1984-08-01), Adderley, Jr.
patent: 4642041 (1987-02-01), Murphy
patent: 4689187 (1987-08-01), Markel et al.
patent: 4695240 (1987-09-01), Li et al.
patent: 4730935 (1988-03-01), Kolossow
patent: 4766676 (1988-08-01), Shogenji et al.
patent: 4966539 (1990-10-01), Pena
patent: 5035509 (1991-07-01), Kruder
patent: 5106286 (1992-04-01), Maschinenfabrik
patent: 5215374 (1993-06-01), Meyer
"The Dynamic Behavior of Extruders," I. Patterson et al, 1978 ANTEC, pp. 483-487.
"Development of Computer Control Strategies for Plastic Extruders", J. Parnaby et al, Polymer Engineering and Science, Aug. 1975, vol. 15, No. 8, pp. 594-605.
Miller Austin R.
Randcastle Extrusion Systems, Inc.
Thurlow Jeffery R.
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