Core blowing machine

Details Core blowing machine Core blowing machine

1990-05-07

1991-12-17

Batten, Jr., J. Reed

Metal founding

Means to shape a forming surface

Including means for compacting particulate fluent mold...

164201, 164228, B22C 912, B22C 1312, B22C 1522

Patent

active

050727753

ABSTRACT:
A foundry core blowing machine includes an upright frame with a blow head for a sand-resin mix fixed at the top. Sectionalized vertically movable rods extend through bushings at the top and bottom of the frame. Fixed to the rods are a cope support and a secondary table. The secondary table supports the cylinder of a cope-drag clamp piston-cylinder assembly with the rod of such assembly being connected to a primary table thereabove which slidably moves on the rods. The secondary table and the rods secured thereto are elevated independently of the cope-drag clamp so that the clamped cope and drag may be elevated to be clamped against the blow head, lowered for interposition of a gassing head, and reclamped for cure, all while the cope and drag remain firmly clamped together. Only after curing are the cope and drag unclamped for lowering, stripping and removal of the core from the machine. The continuous high pressure clamp of the drag to the cope during blow and subsequent cure, even though the assembly is unclamped from the blow head prevents sand from entering between the abutting surfaces of the cope and drag and the forming of finning. The rods are formed in sections with the center section being readily replaced with rods of different height to control the shut height or window of the machine. The machine includes a removable blow plate and a shuttling gassing head. Both the blow plate and cope may quickly be secured to and released from the machine, so that tooling sets, even including the gassing head, may be assembled on a power operated tooling change conveyor and quickly assembled into and out of the machine upon vertical movement of the primary and secondary tables, each with a single cycle of the machine. The machine may also include a shuttling curing gas supply nozzle for automated connection/disconnection with the shuttling gassing head during tooling cycles.

REFERENCES:
patent: 3096547 (1963-07-01), Hunter et al.
patent: 3556195 (1971-01-01), Lund
patent: 4559989 (1985-12-01), Kawai et al.
patent: 4711292 (1987-12-01), Rommel et al.
patent: 4714100 (1987-12-01), Bellis et al.
patent: 4832108 (1989-05-01), Nagarwalla et al.

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