| 摘要 |
PURPOSE:To obtain a surfboard excellent in strength wholly and locally by a method wherein a core material, on the outer surface of which reinforcing fibers are attached, is inserted in a pair of molding forces, on the inner surfaces of which a gel coat layer for forming outer skin and an uncured plastic layer are formed, in order to form the outer skin and at the same time to make the outer skin and the core material into an integral body by curing the uncured plastic. CONSTITUTION:Reinforcing fibers and a mat, to which epoxy resin is respectively applied with brush or the like, are laid on the molding surface, onto which gel coat 31 is sprayed, of a bottom force 5 so as to form a layer 36 after deaeration. The layer 36 is similarly formed to a top force 6. In addition, a core material 2 is formed out of styrol foam with another mold. The core material 2 is made to have a shape, only the thickness of which is larger than that of the inner dimensions of the molding forces 5 and 6. Further, reinforcing fibers 37 are fastened on the outer surface of the core material 2 with tackers 49 on the bottom force side and similarly on the top force side. After the forming of the layers 36 and before the hardening of epoxy resin, the core material 2 is inserted in the bottom force 5 and epoxy resin is applied to the reinforcing fibers 37 on the top force side of the core material 2 with brush or the like and, after that, a lightweight mat is laid on the reinforcing fibers 37. The top force 6 is registered to the bottom force 5 and clamped together with clamps 56. By holding the above-mentioned state for a certain period of time, an outer skin 3 is formed so as to make the outer skin 3 and the core material 2 into an integral body. |
