Device for injection moulding tubular preforms made of a thermop

Details Device for injection moulding tubular preforms made of a thermop Device for injection moulding tubular preforms made of a thermop

1987-02-20

1988-11-01

Nozick, Bernard

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

Mold having movable core or movable pin

B29B 1106

Patent

active

047815736

ABSTRACT:
The tubular preform is injection moulded in an injection mould whose initially axially reduced injection cavity is progressively enlarged in the direction of the axis of the preform in step with its filling by the injected thermoplastic until a moulding cavity is obtained which corresponds to the volume and to the shape of the preform to be produced. To this end, the injection mould comprises external die-halves and a central core, which can be moved in relation to each other in the direction of their common lengthwise axis during the injection moulding cycle.

REFERENCES:
patent: 2801444 (1957-08-01), Lovenian
patent: 3409709 (1968-11-01), Cleereman et al.
patent: 3778211 (1973-12-01), Moen et al.
patent: 3966378 (1976-06-01), Valyi
patent: 4332545 (1982-06-01), Cargile
patent: 4632657 (1986-12-01), Potoczky

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