Blow molding extrusion head

Plastic article or earthenware shaping or treating: apparatus – Stock pressurizing means operably associated with downstream... – Including auxiliary shaping means associated with molding...

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Details

425466, 425467, 425532, B29C 4722, B29C 4904

Patent

active

052844340

ABSTRACT:
An extrusion head for a blow molding machine wherein a movable plunger is slidably mounted in a distributor head which receives a melt at an inlet end of its channel and directs it along such channel to the terminal end of the channel while simultaneously directing portions of it along spiral radial paths to the lower circumferential edge of the distributor head to fill an accumulator chamber which also causes the plunger to recede facilitating the filling of the accumulator chamber. The channel as defined by the adjacent circumferential wall and the curvilinear contour on the distributor head defines a smooth integral flow channel that is curvilinear in cross section.

REFERENCES:
patent: 3345690 (1967-10-01), Hagen
patent: 3386132 (1968-06-01), Fischer
patent: 3801254 (1974-04-01), Godtner
patent: 3909183 (1975-09-01), Hsu
patent: 3985490 (1976-10-01), Kader
patent: 4038017 (1977-07-01), Langecker
patent: 4063865 (1977-12-01), Becker
patent: 4120633 (1978-10-01), Feuerherm
patent: 4149839 (1979-04-01), Iwawaki et al.
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patent: 4563147 (1986-01-01), Langecker
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patent: 4798526 (1989-01-01), Briggs et al.
patent: 4802833 (1989-02-01), Shapler
patent: 4890994 (1990-01-01), Shapler et al.
patent: 4895744 (1990-01-01), Briggs et al.
patent: 5116215 (1992-05-01), Hsu
patent: 5206032 (1993-04-01), Bock
Europlastics, vol. 47, No. 2/3, Mar. 1974; pp. 67-71.

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