STACK MOLDING

PURPOSE:To produce a thin metallic product without necessitating cutting and grinding works by using a board mold made of a ceramic fiber having the specific composition, at the time of casting directly of thin product, having shape resembling the product, from molten metal of pure metal or alloy. CONSTITUTION:At the time of producing the thin disk plate made of the metal or alloy, on the lower face of the board mold 1, having circular step and two inlay holes 5 at the circumference on the upper face, a casting space 4, having shape corresponding to the product, and a recess part, fitting to a circular projecting part of the upper face of a board mold 2 for a lower mold and dowels 6 are provided, and plural board molds are piled by joining the board molds 1 and the board mold 2 through this inlaying holes 5 and the dowels 6. Next, a runner 3 and a sprue 9 penetrating to each casting space 4 are arranged. These board molds are made by forming the material quality of ceramic fiber consisting of 50-60% Al2O3, 40-50% SiO2 by an inorganic binder, such as sodium silicate, etc. As the board mold has little thermal conductivity, the molten metal, which is cast through the sprue 9 and the runner 3, is cast as the same shape as the casting space 4, and so it is no necessary to cutting, grinding and polishing works as the conventional process.