Method of manufacturing composite member, and mold used therein

A method of manufacturing a composite member, in which a porous plate member and a resin molded portion are integrally formed using a mold, the mold comprising:

• one mold;
• another mold facing the one mold and forming a cavity with the one mold when the one mold and the another mold are clamped together;
• and
• a plurality of movable pins including a base end portion that is in contact with the one mold via an elastic body,
• the movable pin being capable of retracting a leading end portion thereof from a state in which the leading end portion projects out from a cavity face of the one mold toward the another mold, to a position that is retracted from a cavity face of the another mold at a time of clamping, by deforming the elastic body, and
• the leading end portion having an oblique face portion that is inclined with respect to the cavity face of the another mold, toward which the oblique face portion faces,
• the method comprising:
• positioning the porous plate member in the one mold using the movable pin in a state in which the leading end portion of the movable pin projects out toward the another mold;
• clamping the one mold and the another mold together to press the porous plate member, and pressing a leading end portion of the movable pin by the another mold to retract the movable pin against an elastic restoring force of the elastic body;
• and
• forming the composite member, in which the porous plate member and the resin molded portion are integrally formed, by injecting a synthetic resin raw material into the cavity such that a flow of the synthetic resin raw material is applied to the leading end portion of the movable pin, the movable pin is further retracted against an elastic restoring force of the elastic body, and the synthetic resin raw material is cured in a state in which the synthetic resin raw material has entered a space in which the leading end portion of the movable pin has been retracted, thereby forming a resin molded portion.