Molding apparatus including one-piece flexible mold and means to

Details Molding apparatus including one-piece flexible mold and means to Molding apparatus including one-piece flexible mold and means to

1976-09-17

1977-08-30

Shore, Ronald J.

Plastic article or earthenware shaping or treating: apparatus

Shaping surface including means to release or remove product...

By means flexing or deforming the mold

425DIG44, 425DIG58, 249134, 249139, 264335, B28B 706, B29C 700

Patent

active

040451534

ABSTRACT:
Molding apparatus for molding articles without a seam or parting line even though the molded articles may have severe backdraft portions. The apparatus includes a one-piece flexible mold which is deformable subject to the application of fluid pressure, a vacuum pot large enough to accommodate the flexible mold therein and means for applying vacuum to the pot such that the mold may be expanded by the vacuum thereby releasing the molded article. The vacuum pot is provided with upwardly extending projections positioned in the bottom of the pot and the mold is provided with a restraining ring member for supporting the mold wall and for acting in conjunction with the upwardly extending projection to control the mode of expansion of the mold.

REFERENCES:
patent: 1953167 (1934-04-01), Geyer
patent: 3353220 (1967-11-01), Lenoble
patent: 3776683 (1973-12-01), Putzer et al.
patent: 3883109 (1975-05-01), Hahne

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