Mold device for the production of hollow bodies from thermoplast

Details Mold device for the production of hollow bodies from thermoplast Mold device for the production of hollow bodies from thermoplast

1976-08-03

1977-12-20

Lazarus, Richard B.

Plastic article or earthenware shaping or treating: apparatus

Female mold and means to shape parison directly by internal...

Including means to prepare parison

425537, B29D 2303

Patent

active

040638685

ABSTRACT:
The mold device is arranged to produce hollow bodies having at least one undercut formed by a radially offset circumferential wall portion, and includes a hollow mold and a movable mold plate which are interconnected during at least the mold closing and opening phases. The hollow mold is formed by a one-piece main body and a plural-part auxiliary body, with the latter forming the undercut. The parts of the auxiliary body are radially movable normal to the axis of the hollow mold through at least the radial extent of the undercut so that, when the parts of the auxiliary body have been moved outwardly, the produced thermoplastic material body can be removed axially from the main body of the hollow mold. The hollow mold is a blow mold operatively associated with an injection mold which is used to produce a preform of the hollow body which is then blow molded, in the hollow mold, to the desired shape.

REFERENCES:
patent: 3016669 (1962-01-01), Grosclaude
patent: 3029468 (1962-04-01), Valyi
patent: 3616491 (1971-11-01), Vollers
patent: 3640665 (1972-02-01), Seefluth

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