Patent ID: 7258154

Claim:
An apparatus for manufacturing a disc rotor made of a metal-based composite material including a preform comprising: a cavity forming die forming a disc rotor casting cavity for accommodating said preform and a molten metal therein; a preform supporting portion provided on a part of said cavity forming die to define the position of said preform in said cavity; a molten metal pressurizing unit for applying a pressure upon the molten metal accommodated in said cavity; and a preform biasing mechanism which is provided so that it can be relatively moved toward and away from said preform supported by said preform supporting portion; said preform biasing mechanism having a biasing face which can be in a face-to-face contact with a flat face of said preform; said preform biasing mechanism being adapted to position said preform in said cavity in conjunction with said preform supporting portion and to prevent the shifting of said preform due to an increase in the pressure upon the molten metal by biasing said preform via said biasing face on application of a pressure upon said molten metal by said molten metal pressurizing unit.