Injection moulding

Details Injection moulding Injection moulding

1979-08-23

1981-04-28

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

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

Mold having movable core or movable pin

425573, 425468, 249107, 2643288, B29F 100, B29C 100

Patent

active

042642957

ABSTRACT:
In the moulding of plastics material using a female mould cavity into which a number of cores are inserted, in order to prevent deflection of the cores under the action of the injected plastics material, complementarily shaped formations are provided on the free ends of the cores and the mould wall, the formations being so disposed and arranged as to produce restoring forces tending to reduce deflection of the cores and to prevent transmission of deflection between adjacent cores. Various examples of suitable formations are disclosed. The invention is illustrated with reference to its application to the manufacture of battery boxes.

REFERENCES:
patent: 3374503 (1968-03-01), Boniger
patent: 3397266 (1968-08-01), Ayres
patent: 3473197 (1969-10-01), Wilds et al.
patent: 3481002 (1969-12-01), Dreps
patent: 3509603 (1970-05-01), Halsall et al.
patent: 3673302 (1972-06-01), Halsall et al.
patent: 3816181 (1974-06-01), Buckethal
patent: 3995008 (1976-11-01), Spiegelberg
patent: 4063007 (1977-12-01), Spiegelberg

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