Patent ID: 8118974

Claim:
A method of producing a structure for producing castings, which comprises an organic fiber in an amount of from 10 to 30 wt. %, an inorganic fiber in an amount of from 2 to 30 wt. %, inorganic particles in an amount of from 30 to 60 wt. %, and a thermosetting resin in an amount of from 5 to 40 wt. %, wherein the inorganic fiber is carbon fiber and the thermosetting resin is at least one thermosetting resin selected from the group consisting of phenol resin, epoxy resin and furan resin; and wherein the structure for producing castings has a surface roughness (Ra) of 3 to 20 μm and a thickness of 0.2 to 5 mm, which comprises: depositing a starting slurry comprising at least the organic fiber, the inorganic fiber and the inorganic particles into a papermaking mold; dewatering the slurry; forming a fiber laminate; transferring the laminate to a second mold; and molding the laminate.