Patent ID: 7833455
Filing Date: 2010-11-16
Classification: B29C,B29L

Abstract:
1. A method of producing a robot hand member which is mounted on an arm unit of an industrial robot, the robot hand member being essentially composed of a fiber reinforced plastic obtained by laminating prepreg sheets containing therein carbon fibers to have a generally rectangular-shaped cross section and by heating said laminated prepreg sheets to a predetermined temperature to thereby be thermally set, the method comprising the steps of: winding prepreg sheets in multi-layer on the outer peripheral surface of a core member that is made of a metallic or resin material having a non-deformable property at temperatures equal to or lower than the predetermined temperature and a thermal expansion coefficient larger than that of said fiber reinforced plastic, the core member being formed to have a generally rectangular-shaped cross section; molding the outer surface shape of said wound prepreg sheets into a predetermined size by pushing an outer mold having a predetermined inner surface shape onto the outer peripheral surface of said wound prepreg sheets; heating said molded prepreg sheets to the predetermined temperature to thermally set the heated prepreg sheets, to form the fiber reinforced plastic; and removing the core member from said fiber reinforced plastic to form a hollow structure, wherein said step of winding prepreg sheets in multi-layer comprises: