Transfer molding venting system

Details Transfer molding venting system Transfer molding venting system

1977-04-01

1979-02-20

Briggs, William R.

Plastic article or earthenware shaping or treating: apparatus

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

Molding of thermosetting or cross-linking stock

425405R, 425420, 425546, 425812, B29F 100, B29H 310

Patent

active

041404700

ABSTRACT:
Apparatus for molding elastomeric articles is disclosed, the apparatus including an injection unit having an open-ended chamber in which elastomeric stock is disposable and from which such stock can be expelled, a multi-cavity mold having cavities aligned with corresponding ones of the apertures of the end plate, a device for moving the injection unit and mold relative to one another to engage the mold with the end plate, and a pneumatic venting system for evacuating fluid entrapped in each of the mold cavities preparatory to filling the latter with elastomeric stock from the injection unit. The foregoing abstract is neither intended to define the invention disclosed in the specification, nor is it intended to limit the scope of the invention in any way.

REFERENCES:
patent: 1190072 (1916-07-01), Aiken
patent: 2452382 (1948-10-01), Long
patent: 2586148 (1952-02-01), Clark et al.
patent: 2976571 (1961-03-01), Moslo
patent: 3341647 (1967-09-01), Aberle
patent: 3372436 (1968-03-01), Davis
patent: 3859024 (1975-01-01), Pasch et al.

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