Sand-forming apparatus

Metal founding – Process – Shaping a forming surface

Reexamination Certificate

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Details

C164S021000

Reexamination Certificate

active

07137432

ABSTRACT:
A sand-forming apparatus (10) comprising a sand magazine (12), a manifold (14), a core box (16) defining a cavity (18), a clamp table (20), and a blow tube assembly (22). The apparatus (10) is convertible from a sand-blowing state to a catalyst-introducing state without removal of the blow tube assembly (22) and/or un-clamping of the tool package (e.g., the manifold (14) and the cope/drag halves of the core box (16)). In the sand-blowing state, sand is blown from the magazine (12) into the cavity (18) and, in the catalyst-introducing state, the catalyst is introduced into the blown sand in the cavity (18) to solidify the sand into a sand-shape. Molten metal can be poured into or around the sand-shape formed by the apparatus (10) and, upon completion of casting the metal part, the sand-shape can be removed.

REFERENCES:
patent: 3461948 (1969-08-01), Londal et al.
patent: 4836269 (1989-06-01), Bellis et al.
patent: 5787957 (1998-08-01), Nagarwalla et al.
patent: 6866083 (2005-03-01), Senk et al.
patent: 259 557 (1988-03-01), None
patent: 480 164 (1992-04-01), None
patent: 815 986 (1998-01-01), None
patent: 844 036 (1998-05-01), None
EP 04 75 0629; Supplementary European Search Report dated May 22, 2006.

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