INSERT MOLDING METHOD AND INSERT MOLDING DEVICE

PROBLEM TO BE SOLVED: To get rid of a fear of flowing-out of a resin in a molding mold from a filling space where the resin is filled to a non-filling space where the resin is not filled, and to prevent excessive pressure from applying on an insert component during closing the mold.SOLUTION: The lower mold 10 and upper mold 20 are closed so that the respective partition walls 12 and 22 enclose the boundary between the mold part 40a and the non-mold part 40b of the insert component 40, and the molten thermoplastic resin is filled from a gate 30 to the filling spaces 14 and 24. The filled thermoplastic resin is cooled and stiffened by cooling sources 70 and 70. The thermoplastic resin which may flow out from the filling spaces 14 and 24 through a clearance between the partition walls 12 and 22 and the insert component 40 to the non-filling spaces 15 and 25 is cooled and stiffened by letting a coolant 50 flow in the flow passages 13 and 23 formed inside at the tip ends of the partition walls 12 and 22.