Differential pressure, countergravity casting apparatus using a

Details Differential pressure, countergravity casting apparatus using a Differential pressure, countergravity casting apparatus using a

1990-12-19

1991-07-09

Batten, Jr., J. Reed

Metal founding

Means to apply vacuum directly to work or to hold or...

Means applying vacuum or suction directly to molten casting...

164341, B22D 1806

Patent

active

050296302

ABSTRACT:
Differential pressure, countergravity casting apparatus includes a vertically-parted mold stack comprising a plurality of side-by-side mold members disposed on an underlying mold drag. First and second cam shafts are rotatably disposed inside a vacuum box confronting the mold stack and are rotated to engage respective first and second end mold members of the mold stack to clamp the mold stack sealingly together sans glue. Upper ends of the cam shafts extend above the ceiling of the vacuum box and are operatively connected to an actuator linkage for effecting cam shaft rotation in a manner to clamp the mold stack together or in a manner to release the mold stack after casting.

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patent: 4858672 (1989-08-01), Chandley
patent: 4932461 (1990-06-01), Schaffer et al.
patent: 4957153 (1990-09-01), Chandley

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