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AssigneePettibone Corporation
InventorRobert S. Lund
Estimating the term…
In foundry core-blowing, a blow box snugly fits a plunger which moves through it during the blowing step. In effect, the plunger pushes all of the fluidized sand mix out of the blow box and into the core box. This solves problems which have long impeded the use of quick setting sand mixes in blowing of cores and the like. With more conventional sand mixes better and more uniform packing of the sand in the mold is believed to be achieved. Two measuring feeders are provided supplying two different sand mixes which are non curing when separate but fast setting when mixed. They are mixed in a rapid mixer, dumped into a charging tube which quickly dumps the mix into a blow box. The plunger moves through the charging tube and then through the blow box, cleaning both and aiding in the blowing of all of the sand mix into the mold or the blow tube leading to it. The tip of the blow tube has an internal lip which breaks off any residue or plug retained within this tube.
The combination of a foundry blow box for blowing sand from the blow box into a mold, said box having a sand receiving cavity leading to a blowing exit and being constructed for the supply of fluidizing air to said cavity;
The combination of a foundry blow box for blowing sand into a mold, said box having a sand receiving cavity leading to a blowing exit and constructed for supply of air to the cavity for fluidizing and blowing the sand;
The combination of a foundry blow box for blowing sand into a mold, said box having a cavity of uniform transverse dimensions surrounded by a wall and constructed for supply of air to the cavity for fluidizing the sand and blowing it through said exit and a plunger moving into said cavity toward said exit as a displacement means displacing the fluidized sand toward said exit.
The combination of a blowbox for blowing sand from the blowbox into a mold, said blowbox having a sand-receiving cavity leading to a blowing exit and constructed for the supply of air into said cavity for fluidizing sand in the cavity and blowing it through the exit;
Dependencies are inferred from the claim text.