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US 5,915,451 AGranted
Casting core fabrication apparatus
AssigneeOsaka Shell Industry Co., Ltd.
InventorNobuhiro Nakamura
Life of this patent
Estimating the term…
Abstract
A mold sand feeding tank 4 is provided for feeding mold sand S into a hollow core molding portion 2 defined by a pair of molds 1a and 1b mating with each other. A switching valve 7 is disposed within the mold sand feeding tank 4 and has a mold sand feeding opening 5, through which the mold sand S is fed into the mold sand feeding tank 4 from the outside, and a mold sand discharging opening 6, through which non-hardened mold sand Sb within the hollow core molding portion 2 is directly and externally discharged.
Claims10
A hollow casting core manufacturing machine, comprising
- (a) two mateable mold portions,
- (b) a mold sand feeding tank for feeding mold sand into said mold portions when they are mated to form a mold,
- (c) means for heating said mold whereby a part of mold sand within said mold heated by said heated mold becomes hardened,
- (d) a rotatable switching valve disposed within said mold sand feeding tank for selectively passing mold sand into the mold, and for removing nonhardened mold sand from the interior of the mold.
1 more element
Dependencies are inferred from the claim text.