METHOD OF MANUFACTURING SHEET CUSHION

摘要

PROBLEM TO BE SOLVED: To remarkably lower the rate of occurrence of a molding defect by surely preventing the infiltration of a liquid expandable resin material into the recessed part of a fastener supporting member even if there is misalignment in setting, etc., by accompanying an increase in a line speed. SOLUTION: This insert molding method comprises inserting and setting the fastener member 3 inside the fastener supporting member 2 which is fixed to the prescribed position of a molding form 1 and moves linearly in such a manner that an engaging member 3a thereof is accepted in a recessed part 2a and filling the liquid expandable resin material into the molding form 1 in this state to fix and integrate the fastener member 2 to the surface of the forming mold 1. In this method, an overall length L1 of the fastener member 3 is set at such a length at which belt-like bases 3a at both ends in the longitudinal direction of the fastener supporting member 2 project further outward that the end of a material infiltration preventive surface 2b on the fastener supporting member 2 side in the state of inserting the fastener member inside the fastener supporting member 2.