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    • 3. 发明专利
    • BELLOWS MOLDING DEVICE
    • JPS63280616A
    • 1988-11-17
    • JP11529687
    • 1987-05-12
    • HITACHI LTDHITACHI SETSUBI ENG KK
    • SUGIYAMA SENTAKEI TETSUOMISHINA YASUHIKOKIKUCHI YOSHIOKAZAMA KAZUHIROSHIMIZU YOICHISUGAWARA HITOSHI
    • B29C53/58B29C53/30B29L23/18
    • PURPOSE:To shorten the overall length of a cylindrical molding machine, lessen the deflection of the molding machine caused by the pressure of molding outer shape at the time of bellow molding and attaining high accuracy of bellow molding by providing bearing sections which slide specifically at both ends of a cylinder. CONSTITUTION:Both ends of a cylinder 6 are retained by cylinder retaining sections 12 and 13. When the side surface of a cylinder 6 is pressed by a molding outer shape 5, the cylinder 6 is transferred to the position to come into contact with a shaft 1 and clamped by the molding outer shape 5 and a molding inner shape 4. Further, when the cylinder 6 is pressed by the molding outer shape 5, plastic deformation of the cylinder surface is started by the action of the recessed section of the molding outer shape 5 and the projected section of the molding inner shape 4 to shrink the overall length of the cylinder 6. As bearing sections 10 and 11, however, slide along the shaft 1, a bellows 6C of good accuracy is molded on the side surface of the cylinder 6. Since the shaft 1 is short, the deflection of the shaft 1 is small even when the molding load is applied from the molding outer shape 5 to the shaft 1, and a belows of high accuracy can be molded. Also, as the bearing section 10 can be slided outside the shaft 1, the cylinder 6 can be on and off the shaft 1 easily.
    • 4. 发明专利
    • FORMING DEVICE
    • JPS63162219A
    • 1988-07-05
    • JP30849186
    • 1986-12-26
    • HITACHI LTDHITACHI SETSUBI ENG KK
    • KIKUCHI YOSHIOSUGIYAMA SENSUGAWARA HITOSHIKOMATSU SEIICHIHAMASHIMA TAMIJI
    • B29C53/30B29L23/18
    • PURPOSE:To obtain the forming device excellent in working accuracy by providing the gripping mechanism of the object to be formed and the transferring and supporting mechanism supporting the gripping mechanism in pushing direction in a freely reciprocating manner. CONSTITUTION:A forming plate 4 is in contact with the outer peripheral surface of the cylinder 6 which has been set, thereby pushing the thin wall cylinder 6 to left side. The whole mechanism supported on a roller table is moved to left side, and since the cylinder is gripped by a roller receiving member 17, the shaft axes of the cylinder 6 and a shaft 1 are mutually shifted in horizontal direction, but the parallel relationship of each shaft axis is not changed. Further, the forming plate 4 is pushed to the cylinder 6 with a piston cylinder device 26, and suitable forming force is obtained, and then the forming begins by rotating the shaft 1. In this time, since the cylinder 6 is surely gripped by the roller receiving member 17, the cylinder 6 rotates, while holding the parallel relationship of the shaft cores of the shaft 1 and the cylinder 6, whereby since a formed bellows intersects accurately in right angles with the shaft axis of the cylinder 6, the quality of the formed object is very excellent.