CPC B29C 66/436 (2013.01) [B29C 66/8322 (2013.01); B60N 2/914 (2018.02); B60N 2/976 (2018.02); B29L 2031/443 (2013.01); B29L 2031/58 (2013.01)] | 12 Claims |
1. A method for manufacturing an air bag, comprising:
forming a bag portion surrounded by a welded portion extending in an annular shape by pressing at least one welding mold against two sheet materials arranged to be stacked from a stacking direction of the sheet materials,
wherein the welding mold is pressed against the sheet materials to form the welded portion including a welding bead portion protruding to an inside of the bag portion between the sheet materials, and
wherein a pressing surface of the welding mold against the sheet materials is provided with a slope portion facing in the stacking direction of the sheet materials and in a direction of the inside of the bag portion at a position further on an outside of the bag portion than a position at which the welding bead portion is formed.
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