| 摘要 |
PURPOSE:To easily produce a molding roll having reverse grain patterns on the outer surface thereof and to make the reverse grain patterns continuous so as not to develop discontinuous joints. CONSTITUTION:Silicon rubber is cast on the periphery of the trunk of a tree to form a flexible film and a slit 4 is formed to a part of the flexible film to peel the film from the trunk 1 of the tree. This flexible film 3 is turned inside out to be wound around a columnar member and an epoxy resin is cast on the periphery of the flexible film 3 to form a cylindrical matrix and the flexible film 3 and the columnar member are removed from the inner surface of the cylindrical matrix. Electroforming is applied to the inner surface of the cylindrical matrix to form an electroforming roll shell. A roll core is arranged at the center position of the electroforming roll shell and the gap between the electroforming roll shell and the roll core is filled with an epoxy resin to form a bonding layer. |
