Method of dry coating sand cores
AssigneeLaempeReich Corporation
InventorsDavid Reich, Harry Reich
Life of this patent
Estimating the term…
Abstract
A method for applying a refractory coating to a sand core, to be used for a metal casting, in a dry state, without the use of a liquid carrier. The coating may be applied by pressing the coating into a mixture of refractory material and impacting media fluidized in a vibratory bed such that the core floats in the mixture, and then rotating the core to coat the surfaces that will be in contact with the molten metal in the casting process.
Claims18
A method of applying a dry coating to a sand core, comprising allowing the core to bear against a fluidized mixture of an impacting media and a coating powder, said mixture fluidized such that said core floats in said mixture with a desired degree of submersion.
A method of applying a dry powder coating to a sand core, comprising:
- (a) fluidizing in a tub with a vibratory drive a mixture of an impacting media and a coating powder sufficiently to impart a circulatory flow to said mixture in said tub;
- (b) submerging the sand core in said mixture to a predetermined extent;
- (c) allowing the core to bear against the mixture.
(canceled)
(canceled)
Dependencies are inferred from the claim text.