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    • 3. 发明专利
    • GRAPHITE CASTING MOLD
    • JPH05200485A
    • 1993-08-10
    • JP22401792
    • 1992-08-24
    • AMSTED IND INC
    • PAWLIK JOHN L
    • B22C9/06B22C9/08B22C9/28B22D18/04B22D27/04
    • PURPOSE: To make it possible to uniformly cool molten metal by forming recessed parts on the lower surfaces of risers, disposing sleeve liners between the risers and the recessed parts and providing the lower surface of a cope with belt-like groove parts for accepting the sleeve liners. CONSTITUTION: The molten metal poured from a metal bath 17 into the cavity 20 between the cope 16 and drag 18 of a graphite casting mold 10. The riser 28 is formed of a cylindrical passage 50 having the sleeve liner 54. The refractory material of the sleeve liner 54 and the graphite of the graphite casting mold 10 have a difference in thermal electrical conductivity and give rise to a temperature gradient. The temperature gradient between the belt-like groove part formed in the lower part of the cope 16 and the adjacent end may, therefore, be minimized. The molten metal is uniformly cooled and the generation of cavities in castings may be lessened by riser passages 50 packed with the refractory material between the adjacent risers 28 of the casting mold 10 having the many risers 28.