Patent ID: 8794951
Filing Date: 2014-08-05
Classification: B29C,Y10T

Abstract:
1. A mold for resin molding, comprising: a mold; a design layer formed inside the mold; and an air permeable interposing layer configured to form the design layer on an inner surface of the mold; the mold having a ventilating throughhole; a die surface having fine projections and depressions being provided on the surface; the design layer having a thermosetting resin layer formed by pasting a sheet of thermosetting resin or by applying the thermosetting resin over the entire surface, having projections and depressions on a surface of the thermosetting resin layer, and forming a ventilating throughhole so as to connect to the ventilating throughhole of the mold; a curing temperature of the thermosetting resin of the design layer being selected based on an allowable temperature limit heatproof temperature of the mold; the design layer having a thickness of between 0.1 mm and 0.2 mm, and the design layer being made of resin that mixes whiskers; the air permeable interposing layer having a first air permeable adhesive layer to be bonded to an inner surface of the mold, which is formed by drying after applying the same thermosetting resin as that of the design layer to the mold in a thin layer as compared with an air permeable member without losing any ventilation characteristic, an air permeable member formed by drying after coating with the fibrous air permeable member dispersed in water on the top of the first air permeable adhesive layer, and the first air permeable impregnation layer formed by a resin forming the first air permeable adhesive layer, impregnated with the air permeable member and heated to cure with the first air permeable adhesive layer; the air permeable interposing layer having a second air permeable adhesive layer to be bonded to the design layer, which is formed by drying after applying the same thermosetting resin as the thermosetting resin forming the design layer to the surface of the air permeable member in a thin layer as compared with an air permeable member without losing any ventilation characteristic, and a second air permeable impregnation layer which is formed by a resin forming the second air permeable adhesive layer, impregnated with the air permeable member and heated to cure with the second air permeable adhesive layer; the design layer connecting to an inner surface of the mold by interposing the air permeable interposing layer so that a ventilating throughhole of the design layer, a ventilating throughhole of the mold and a ventilating pore of the air permeable interposing layer are connected to each other; the air permeable interposing layer having holes of between 0.01 mm and 0.2 mm forming one or more pore areas; a porosity of the one or more pore areas being within the range of 50% inclusive to 100% exclusive; and the air permeable member including a ventilating material that is resistant to the resin of the first air permeable adhesive layer.