Method of manufacturing expendable salt core for casting
AssigneeBuhler AG
InventorYouji Yamada
Life of this patent
Estimating the term…
Abstract
A melt is made by heating a salt mixture containing a salt of sodium. The melt is set at a temperature higher than the liquidus temperature of the salt mixture, and poured into a mold for expendable core molding. The temperature when the melt is completely poured into the mold is set within a range not exceeding the liquidus temperature of the salt mixture by 30° C. An expendable salt core for casting is molded by solidifying the melt inside the mold. This makes it possible to more stably obtain the strength of a water-soluble expendable salt core for casting made of a salt cast product obtained by melting and molding salts of sodium and the like.
Claims4
A method of manufacturing an expendable salt core for casting, comprising the steps of:
- making a melt of a salt mixture containing at least two salts including a salt of sodium by heating the salt mixture;
- setting a temperature of the melt at a temperature higher than a liquidus temperature of the salt mixture, and pouring the melt into a mold for expendable core molding;
- and
- molding an expendable salt core for casting by solidifying the melt inside the mold;
- wherein
- the step of pouring the melt into a mold includes the step of setting, when the melt is completely poured into the mold, the temperature of the melt within a range higher by not less than 9° C. than the liquidus temperature of the salt mixture and not exceeding the liquidus temperature of the salt mixture by 30° C.
Dependencies are inferred from the claim text.