Patent ID: 7438842

Claim:
A method of manufacturing a molding of resin in which a plurality of divided primary moldings are set in a mold for secondary forming and a heating medium and resin material for secondary forming are selectively injected into a passage for resin material for secondary forming in joint portions of the plurality of primary moldings, the method of manufacturing a molding or resin comprising: a heating medium flowing step in which the heating medium is made to flow into the passage from a flowing port at one end portion of the passage; a resin material injecting step in which the resin material for secondary forming is injected into the passage from an injecting port at the other end portion on the opposite side to the flowing port for the heating medium; and a runner cut step in which the injected resin material is cut off before the injecting port in the mold and dregs of the resin material, which has been cut, are connected to a runner on an injection nozzle side.