| 摘要 |
PURPOSE:To shorten the molding time and uniform the quality of laminates by inserting laminates of required numbers consisting of resin impregnated bases and metal foils between press platens and heat and pressure molding the same under a given molding condition. CONSTITUTION:Required number of pieces of resin impregnated bases are overlapped and required numbers of laminates on the upper and lower surfaces of which metal foils are placed and inserted between press platens, and the material is heated and pressurized for 10-90 minutes with the platen temperature higher by 2-20 deg.C than the optimum temperature for laminate molding and then the platen temperature is lowered to the optimum temperature for laminate molding and heat and pressure molded. At that time, if the platen temperature is lower than 2 deg.C, and the heating and pressurizing time is less than 10 minutes, the temperature rise of a central section between the platens can be achieved speedily, while when the temperature is more than 20 deg.C and for more than 90 minutes, the curing degree of the platen side laminates is too large and a defective quality is generated. |
