| 摘要 |
PURPOSE:To realize a certain fixed sheet thickness distribution and prevent door heat resistance and inferior surface roughness from developing by a method wherein the size of cushioning material, which is to be arranged between hot plate and mirror plate, is made to be equal to or smaller than the size of the mirror plate and, at the same time, larger than the size of the end product of laminated sheet and, in addition, the size of prepreg is made to be larger than that of the mirror plate and larger than that of the cushioning material by 5mm or more. CONSTITUTION:The size of cushioning material 12, which is to be arranged between hot platen 1 and mirror plate 13, is made to be smaller (preferably by 5 - 15mm) than or equal to the size of the mirror plate 13 and, at the same time, larger than the size of laminated sheet in the form of end product, which is obtained by cutting off ends after forming. Further, the sizes of prepreg 14 and of copper foil 15, which is placed on the prepreg 14, when necessary, are made to be larger than that of the mirror plate 15 and larger than that of the cushioning material 12 by extending each end of the prepreg and the copper foil by 5mm or more beyond each side of the mirror plate. At forming, the pressing force applied to the prepreg does not abruptly become zero at the position changing from the end of the mirror plate to its outside and decreases gradually at a certain falling rate. Accordingly, the efflux of resin in the prepregs is small and no thinning of the sheet thickness at the end of the prepreg occurs, resulting in developing almost no lowering of characteristics. |
