METHOD FOR PRESS-BONDING BEAD MEMBER

• Main Author: SASAKI YUKIHIRO
• Format: Patent
• Language: English; Japanese
• Published: 15.02.2021
• Subjects: PERFORMING OPERATIONS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

To provide a method for press-bonding a bead member capable of suitably press-bonding a bead filler to a central portion of a carcass ply in a winding state to suppress the occurrence of air ingress.SOLUTION: A method for press-bonding a bead member includes: a first step for inserting a carcass ply 40 molded in a cylindrical shape into a bead member 10 having a bead core 1a and a bead filler 1b; and a second step for press-bonding the bead filler 1b to a central portion of the carcass ply 40 while holding a state in which an end portion of the carcass ply 40 wound up via the bead core 1a and the bead filler 1b form a V-shaped gap 30. In the second step, a roll 50 provided with an inclined pressing surface 52 with a distance from an axial line 51 becoming larger toward a radial inside Ri is entered into the gap 30, and the inclined pressing surface 52a presses the bead filler 1b to press-bond it to the central portion of the carcass ply 40.SELECTED DRAWING: Figure 4 【課題】巻き上げ途中状態にあるカーカスプライの中央部にビードフィラーを適切に圧着してエア入りの発生を抑制可能なビード部材の圧着方法を提供する。【解決手段】ビードコア１ａとビードフィラー１ｂとを有するビード部材１０に、円筒状に成形されたカーカスプライ４０を挿入する第１の段階と、ビードコア１ａを介して巻き上げられたカーカスプライ４０の端部とビードフィラー１ｂとがＶ字状の隙間３０を形成する状態を保持しながら、ビードフィラー１ｂをカーカスプライ４０の中央部に圧着させる第２の段階とを含む。第２の段階では、径方向内側Ｒｉに向かって軸線５１からの距離が大きくなる傾斜押圧面５２を備えたロール５０を隙間３０に侵入させ、傾斜押圧面５２によりビードフィラー１ｂを押圧してカーカスプライ４０の中央部に圧着させる。【選択図】図４