Parison extrusion head

Details Parison extrusion head Parison extrusion head

1976-12-08

1978-06-27

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

Adjustable shaping orifice or shape imparting insert member

425532, 425381, B29D 2304

Patent

active

040972143

ABSTRACT:
This is an extrusion head for extruding a parison to be blow molded. A shooting mandrel is longitudinally movable within a plastic melt accumulator chamber. After a "shot", the shooting mandrel is in the up position. The plastic melt fed to the plastic accumulating chamber forces the shooting mandrel to the down position as the plastic accumulating chamber is filled. The parison is formed by moving the shooting mandrel upwardly to the up position. The plastic flows around the shooting mandrel as it flows from the accumulating chamber and out of the extrusion head.

REFERENCES:
patent: 3147515 (1964-09-01), Amsden
patent: 3205534 (1965-09-01), Langecker
patent: 3697632 (1972-10-01), Tenner
patent: 3702227 (1972-11-01), Hureau
patent: 3909183 (1975-09-01), Hsu

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