Static molds – Mold including core and means to remove core
Patent
1982-02-10
1983-04-05
Flint, Jr., J. Howard
Static molds
Mold including core and means to remove core
249144, 249184, 425393, 425403, B29F 114, B29C 700
Patent
active
043789285
ABSTRACT:
This is a molding apparatus designed to mold a plastic tub of circular transverse cross-section and re-entrant shape. Specifically, the tub tapers from its closed bottom to its opened top. The mold core is, therefore, collapsed radially to permit extraction of the plastic tub from the mold. This radial collapse is accomplished by forming the mold core of a central segment and a plurality of peripheral segments, and then axially extending the central segment while moving the peripheral segments along a radially inward path so that core collapse occurs. The exterior shape of the peripheral core segments defines a circular cross-sectional shape for the interior of the tub, despite the fact that the central core segment has the configuration of a hexagonal pyramid. Side mold segments which move radially outwardly and a tub extraction ram complete the equipment for extracting the tub from the mold.
REFERENCES:
patent: 3248756 (1966-05-01), Mills et al.
patent: 3339292 (1967-09-01), Lamb
patent: 3373460 (1968-03-01), Ladney
patent: 3534443 (1970-10-01), Tucker
patent: 3677684 (1972-07-01), Platz
patent: 3905740 (1975-09-01), Lovejoy
patent: 4019711 (1977-04-01), Altenhof et al.
Femali Frank
Guzzo Frank
Iwinski Leon J.
Kopp Edward J.
Speechley Ronald F.
Beatrice Foods Company
Flint, Jr. J. Howard
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