| 摘要 |
<p>A method for casting a disc rotor contributive to suppression of partial abrasion at the sliding ring portion, especially to suppression of partial abrasion on the outer circumferential surface side. A mold has a cavity for casting the sliding ring portion, a mold surface for molding the outer circumference, a mold surface for molding the inner circumference, a gate group of a plurality of gates formed at intervals on the outer circumference molding surface side in the circumferential direction and having a center line inclining at an angle of more than 0° but less than 90° against a normal passing the center line (P2) of the casting cavity in the radial direction, and a runner. Molten metal is poured into the casting cavity from the gate at inclination angles ?1, ?2 and ?3 which are in the range of more than 0° but less than 90° against the normal, and then solidified.</p> |
