Tools for injection moulding machines

Details Tools for injection moulding machines Tools for injection moulding machines

1978-06-22

1980-04-22

Arnold, Donald J.

Plastic article or earthenware shaping or treating: apparatus

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

Mold having movable core or movable pin

425128, 425414, 425468, B29F 106

Patent

active

041993160

ABSTRACT:
A tool for use in a moulding machine suited to introducing plastic material under pressure into the mould, comprises a two part mould defining a mould cavity, the mould cavity including a recess formed in one of the parts. The other part closes the recess in use and has slidably mounted therein at least one support member for supporting a core insert in the mould cavity. The or each support member being moveable between a first position in which the member projects into the mould cavity to support the core insert at the commencement of a moulding operation and a second position in which the member is at least partially retracted from the mould cavity to disengage from the core insert. Thus when material is introduced into the mould cavity the or each support member is urged from the first to the second position by pressure of the material after the core insert has been enveloped in the material.

REFERENCES:
patent: 2454561 (1948-11-01), Lester
patent: 2997742 (1961-08-01), Mieville
patent: 3275054 (1966-09-01), Ohl
patent: 3388431 (1968-06-01), Aoki
patent: 3950119 (1976-04-01), Reichenbach

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