To prevent a metal foil surface, a specular plate surface, and a press disc surface from fouling due to molten resin by using a metal foil having smaller dimension than that of a prepreg at least on one surface of the prepreg to then be heat compressed in superimposition with the prepreg in a manner that the prepreg is exposed over the entire circumference of the metal foil.
The metal foil 2 is preferably formed in that the circumference of prepreg 1 is of 3-15 mm in width, i.e., has dimensions of size capable of forming a part 5 not being covered by the metal foil 2 for ease of cutting down edge parts and positioning because of the end of the prepreg 1 exposed as the metal foil 2 is superimposed on the prepreg 1. That is, the metal foil 2 having smaller dimensions than that of the prepreg 1 is used for one surface of the prepreg 1; however, the dimensions of metal foil in another surface are available either in larger or smaller than that of the prepreg 1. Conditions of heat and compression depend on a temperature, pressure, and time in accordance with thermosetting resin respectively used in the prepreg.
OYA KATSUHIKO
KATAOKA KAZUO
KIKUCHI KIYOSHI
KINOSHITA HIROYUKI
