Abstract: A method of manufacturing a hollow salt core may include an injection operation, in which molten salt including an ingredient of a salt core is injected into a mold through pressurization; a primary maintenance operation, in which a pressure is maintained in the mold including the injected molten salt; a primary decompressing operation, in which a portion of the molten salt maintained with the pressure is collected in the mold through decompression of the mold; a secondary maintenance operation, in which a pressure is maintained in the mold including the residual molten salt after the primary decompressing operation; and a secondary decompressing operation, in which the pressure of the mold is decreased after the secondary maintenance operation.

Abstract: Provided herein are a saltcore for casting with aluminum and a manufacturing method thereof, and more particularly, a saltcore and a manufacturing method thereof capable of reducing shrinkage while satisfying strength during die-casting by including at least one cation of K+, Na+ and Mg2+ and at least one anion of Cl? and C032?, wherein a saltcore for casting with aluminum may include at least one cation of K+, Na+ and Mg2+ and at least one anion of Cl? and C032?.

Abstract: A differential carrier case with an inserted pipe for high pressure casting may include a mold core into which a first end of a pipe is inserted, a mold core pin fixed to the mold core to fix the mold core and the first end of the pipe, a drive core pin inserted into a second end of the pipe, and a thick portion surrounding an outer portion of the pipe.

Abstract: The present application relates to a method of surface-treating an aluminum material for dissipating heat, which is capable of increasing the radiation heat flux to thus enhance heat dissipation performance, and includes anodizing an aluminum material using an electrolyte composed of oxalic acid, and forming cobalt sulfide (CoS) in surface pores of the aluminum material thus sealing the surface of the aluminum material.