Method for molding resin reinforced with fiber and moldings produced
AssigneesHonda Giken Kogyo Kabushiki Kaisha, Nippon Shokubai Kagaku Kogyo Co., Ltd.
InventorsHiroo Ebisawa, Katsumi Kohama, Tomohisa Abe, Hidemitsu Takizawa, Daisuke Atobe, Kenichi Ueda
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Abstract
The method for molding a resin reinforced with fiber wherein a resin sheet reinforced with fiber is positioned juxtaposed a face of a mold, which is either one of a female mold or a male mold, and then hardened, but before molding, modifying the viscosity to different levels in different portions of the resin sheet. Thus, it is possible to surely prevent occurrence of a partial difference in thickness of the moldings or, if necessary, to partially change these thicknesses according to predetermined values.
Claims22
In the method of forming a molded article of thermosetting resin which comprises:
- forming a sheet comprising said thermosetting resin and reinforcing fibers;
- effectively contacting such sheet with a molding surface having portions which, during subsequent molding, cause different amounts of undesirable thinning in portions of the walls of said molded article;
- and heating and pressurizing such contacted sheet and molding surface to a temperature and a pressure sufficient to conform said sheet of thermosetting resin to said molding surface, and then cooling said molding article to set the molded shape thereof;
- the improvement, whereby reducing the formation, in said wall portions of said molded article, of undesired differing thicknesses, which comprise:
- prior to molding, modifying the viscosity of portions of said sheet of thermosetting resin corresponding to said wall portions which had been undesirably thinned to viscosities which differ from the viscosity of said thermosetting resin in the remainder of said sheet;
- and
- molding said sheet under conditions sufficient to form said molding article thereby effecting reduced undesired differences in wall thicknesses corresponding to said molding surface portions.
Dependencies are inferred from the claim text.