Hollow core molding device for use in shell mold

Details Hollow core molding device for use in shell mold Hollow core molding device for use in shell mold

1974-09-16

1976-11-02

Husar, Francis S.

Metal founding

Means to shape a forming surface

Including means for compacting particulate fluent mold...

164 22, B22C 1522

Patent

active

039890899

ABSTRACT:
A hollow core molding device for use in a shell mold is disclosed, which device uses for molding a hollow core a permanent mold which is parted into a top part and a bottom part in the horizontal direction. This molding device includes a sand container having some sand injecting pipes for supplying shell sand into the permanent mold; a valve mechanism adapted to be communicated with an external vacuum means; and a nozzle means, through which are injected shell sand into cavities in the permanent mold by being fitted therein; the aforesaid valve mechanism being interposed between the sand container and the nozzle means; whereby for injection of shell sand into the permanent mold, the sand container is communicated with the permanent mold, while after injection of shell sand, the permanent mold is communicated with the external vacuum means to discharge under suction un-hardened shell sand within the hardened shell of a core within a desired short period of time.

REFERENCES:
patent: 2512871 (1950-06-01), Ostermann
patent: 2607967 (1952-08-01), Springer
patent: 2825107 (1958-03-01), Schueler
patent: 2933785 (1960-04-01), Hansberg
patent: 3528481 (1970-09-01), Lund
patent: 3581948 (1971-06-01), Detalle
patent: 3761218 (1973-09-01), Portalier
patent: 3888612 (1975-06-01), Schrewe

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