Apparatus and process for manufacturing disc rotor

a b ab An apparatus and process for manufacturing a disc rotor made of a metal-based composite material, which enables stabilization of a preform support within a disc rotor casting cavity while minimizing likelihood of damaging of preforms. The apparatus comprises a lower die and a movable core assembly which constitutes a disc rotor casting cavity ; a preform supporting portion which is provided on a movable core assembly ; a pressurizing and shaping portion of an upper die for applying pressure upon a molten metal accommodated in the cavity ; and a preform biasing mechanism having a biasing face which can be brought into a face-to-face contact with the upper face of a preform which is supported on the preform supporting portion . On application of pressure upon the molten metal, the preform biasing mechanism biases the preform via the biasing face to prevent the preform from being shifted due to an increase in the pressure upon the molten metal.