Composite flexible mold

Details Composite flexible mold Composite flexible mold

1974-12-04

1976-06-29

Husar, Francis S.

Static molds

Container-type molding device

Plural article forming mold, or molds with community feature

249 66A, 249127, 264335, 264337, 425440, 425DIG44, B28B 706, B29C 700

Patent

active

039661652

ABSTRACT:
A flexible, distensible mold suitable for use in conjunction with a vacuum pot to shape art forms and utilitarian articles, such as foundry sand articles, is disclosed. The composite mold provides an integral, internal, flexible, stretchable shaping element thereof having shaping surfaces therein to confine and shape and hardenable or otherwise curable material being molded, and an outer second element which is a flexible, stretchable element distinct and separate from the first, the outer element being in direct and closely confining contact with the inner element, the outer element being in a condition of stress due to stretching.

REFERENCES:
patent: 3010157 (1961-11-01), Cizek
patent: 3158906 (1964-12-01), Boyer
patent: 3309738 (1967-03-01), Friedman
patent: 3329747 (1967-07-01), Veach
patent: 3353220 (1967-11-01), Lenoble
patent: 3539144 (1970-11-01), Krug
patent: 3555611 (1971-01-01), Reiterman
patent: 3607134 (1971-09-01), McIntyre
patent: 3776683 (1973-12-01), Putzer
patent: 3881682 (1975-05-01), Kin

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