PURPOSE: To provide a metallic mold for centrifugal casting without causing the surface defect, such as flow mark, by arranging a ring shape gate consisting of ring shaped cavity between a center spout and a gate in concentrical state to the center sprue.
CONSTITUTION: This mold for metallic mold has a center spout 2, a gate 3 and a cavity 4, and the gate 3 and the cavity 4 are arranged in the radial direction to the center sprue 2. This metallic mold for centrifugal casting provided with a ring shape gate 3 consisting of ring shaped cavity between the center sprue 2 and the gate 3 in the concentrical state to the center sprue 2. Then, in order to produce this metallic mold, copper or copper alloy, such as pure copper, Be-Cu base copper alloy, Cr-Zr-Cu base copper alloy, are used. By this method, the flow mark caused on the casting surface can scarsely be eliminated and the following treatment, such as sand blast, is simplified.
MAE YOSHIHARU