| 摘要 |
PURPOSE:To improve sense of security at the time of use of the title grip by preventing a slippage of a holding part, by a method wherein a nonfoamable synthetic resin layer is provided on the inside of a premolded body which is interposed between a core material and foamable soft material. CONSTITUTION:A premolded body 11 is fitted over a core material 16, which has been made into a predetermined form, by making use of a slit 15 of the premolded body 11, and a part of a holding part 16a of the core material 16 is coated. The premolded body 11 integrated with the core material 16 is inserted into a tubular shell 18. Then an assembled body is set up within a mold of a predetermined form, which is heated by making use of an appropriate heating device. With this heating, foamable soft material 12 on the outside of the premolded body 11 is foamed and the inside of a space 19 left behind into the shell 18 is filled with the same. Now, a synthetic resin layer 13 on the inside of the premolded body 11 does not foam, but softened through heating and joined close to the surface of the core material 16. Therefore, joining strength between the shell 18, a foamed soft material 20 and the core material 16 can be secured extremely high and that the title grip sliding in longitudinal direction at the time of use of the same does not occur. |
