| 摘要 |
PURPOSE:To prevent the flow of resin into a hole and the generation of void, by a method wherein a prepreg is provided with a hole while the prepreg is formed by hot press in evacuated atmosphere under a condition that the hole is filled of fillers with mold release characteristics. CONSTITUTION:A prepreg 1 is provided with a hole 2 while the prepreg 1 is formed by hot press in evacuated atmospehre under a condition that the hole 2 is filled with releasable filler 3. The hot press forming is effected in evacuated atmospehre, therefore, gaseous constituent in the prepreg is deaerated even when the melting viscosity of the resin of the prepreg 1 is high whereby there is no possibility to generate void in laminated 1 sheets. Accordingly, the forming of the laminated sheet may be effected without casting the resin into the hole 2 provided on the prepreg 1 by employing the prepreg 1 whose resin has a high melting viscosity. The hole 2 is plugged up with the releasable filler 3, filled into the hole 2, therefore, the molten resin of the prepreg 1 may be prevented from flowing into the hole 2 by the releasable filler 3. The releasabie filler 3 is removed of cource after forming. |
