COMPRESSION MOLDING DIE AND COMPRESSION MOLDING METHOD

摘要

A compression molding die is configured in such a manner that, in order to suppress irregular orientation of a molten resin, a slide (movement) surface is adapted so as not to make contact with the resin in a pressure holding operation in compression molding. A compression molding die is provided with a cavity die (34), a core die (35), and a slide insert die (36). Pressure holding operation is performed by a slide fitting section in the compression-molding of a molten resin supplied into a molding cavity formed in the molding dies. The slide fitting section is provided with a slide surface (44d) which faces the molding cavity before the pressure holding operation and is covered by sliding of the slide fitting section after the pressure holding operation. The slide surface (44d) comprises a porous ring (44a) consisting of a porous material which allows gas to flow to the molding cavity. The compression molding die is provided with a gas supply means (49) for supplying the gas to the inside of the molding dies from the porous material. In compression molding using the molding dies, the gas is supplied from the gas supply means (49) to the porous material to minimize the contact of the molten resin with the slide surface (44d).