Plastic article or earthenware shaping or treating: apparatus – Means feeding fluent stock from plural sources to common... – Extrusion shaping means
Patent
1992-06-17
1993-04-20
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Means feeding fluent stock from plural sources to common...
Extrusion shaping means
2642098, 4251331, 425141, 425462, 425466, B29C 4706, B29C 4722
Patent
active
052041204
ABSTRACT:
A multi-layer, multi-parison extrusion head in which nearly identical parisons are extruded from each extrusion station of the head when operated in an intermittent mode. Resin passages are provided within the extrusion head for supplying each of the resins to each extrusion station with the passages configured in a manner such that the ratio of resin volume for one resin in the passages for a given extrusion station compared to the volume of a second resin in the flow passages to the same extrusion station is the same for all extrusion stations while the volumes of resins feeding each station are not equal. As a result, a relatively simple configuration of passages is provided without requiring all of the passages to be of equal length.
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Hoover Universal Inc.
Nguyen Khanh P.
Woo Jay H.
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