Plastic article or earthenware shaping or treating: apparatus – Means providing a shaping orifice – Core – pin or insert member
Patent
1976-08-11
1977-12-20
Husar, Francis S.
Plastic article or earthenware shaping or treating: apparatus
Means providing a shaping orifice
Core, pin or insert member
425380, 425532, B29D 2304
Patent
active
040638650
ABSTRACT:
An extruder head wherein the housing for a mandrel has a lateral inlet for admission of plasticized material into an arcuate bore of the mandrel and the mandrel has two divergent connecting passages which cause the plasticized material to form a first tubular stream with two radial seams at the inner end of an elongated annular chamber which is defined by the housing and mandrel and wherein the material flows toward an extrusion orifice. The inner end of the chamber contains a ring which divides the first stream into two discrete streams one of which flows along a neck portion of the mandrel and the other of which flows around the ring. The two discrete streams merge into a fourth tubular stream downstream of the ring. The periphery of the ring and/or the neck portion of the mandrel has inclined baffles which subdivide the respective discrete stream into several fields whose boundaries at the downstream end of the ring are out of alinement with the seams of the other discrete stream. This insures that the fourth stream does not have any radial seams which extend all the way from its inner to its outer surface.
REFERENCES:
patent: 3488669 (1970-01-01), Goodrum et al.
patent: 3520966 (1970-07-01), Soffiantini
patent: 3561053 (1971-02-01), Pearson
patent: 3611493 (1971-10-01), Fogelberg et al.
patent: 3985490 (1976-10-01), Kader
Bekum Maschinenfabriken GmbH
Husar Francis S.
Kontler Peter K.
Rosenbaum Mark
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