US 11,958,392 B2
Seat pad manufacturing method
Yukiko Yamaguchi, Tokyo (JP); Taisuke Yonezawa, Tokyo (JP); and Yoshiyuki Takahashi, Tokyo (JP)
Assigned to Archem Inc., Tokyo (JP)
Filed by Archem Inc., Tokyo (JP)
Filed on Dec. 6, 2022, as Appl. No. 18/062,017.
Application 18/062,017 is a division of application No. 17/292,934, previously published as PCT/JP2019/039381, filed on Oct. 4, 2019.
Claims priority of application No. 2018-217627 (JP), filed on Nov. 20, 2018.
Prior Publication US 2023/0116023 A1, Apr. 13, 2023
Int. Cl. B60N 2/70 (2006.01); B60N 2/68 (2006.01)
CPC B60N 2/7017 (2013.01) [B60N 2/686 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A seat pad manufacturing method comprising:
a sheet disposition step of disposing a sheet member inside a foaming mold for shaping a seat pad;
a foaming step of injecting a foaming resin material into the foaming mold and foaming a resin foamed body through mold clamping after the sheet disposition step; and
a demolding step of demolding the resin foamed body in a state in which the sheet member is buried in the resin foamed body, wherein
the foaming mold includes a lower mold piece having a lower-mold-piece shaping surface for shaping a surface of the seat pad on a seated person side, and an upper mold piece having an upper-mold-piece shaping surface for shaping a back surface of the seat pad, and
when a direction orthogonal to a right-left direction and a thickness direction of the seat pad is referred to as an extending direction of the seat pad,
in the sheet disposition step, both end parts of the sheet member in the right-left direction and both end parts of the sheet member in the extending direction are each temporarily fastened to the lower-mold-piece shaping surface or the upper-mold-piece shaping surface through one or a plurality of fasteners, and
in the foaming step, the foaming resin material is injected into a space between the lower-mold-piece shaping surface and the sheet member, and at least a central part of the sheet member deforms into a shape curved in a convex shape on the upper-mold-piece shaping surface side in each of the right-left direction and the extending direction as the sheet member is pressed upward to the upper-mold-piece shaping surface side through expansion of the foaming resin material.