Patents Assigned to SIGMA & HEARTS CO., LTD.
  • PRESS FORMING MACHINE, PRESS FORMING METHOD USING PRESS FORMING MACHINE AND ROTOR CORE OF AC GENERATOR FOR AUTOMOBILES MANUFACTURED BY PRESS FORMING METHOD
    Publication number: 20140333157
    Abstract: A taper shaped steel rod-like member allows a cold press molding apparatus to reduce burrs generated in tooling without the use of lubrication while also extending tool live. The method and process is characterized by holding the preshaped processed material on a backside tool, while press-contacting the processed material to a free rotation roll rotating toward the tip element on the processed material, and shaping a taper shape by plastic-reshaping of the processed material.
    Type: Application
    Filed: August 9, 2013
    Publication date: November 13, 2014
    Applicant: SIGMA & HEARTS CO., LTD.
    Inventors: Motoharu Nuka, Takayo Noguchi, Tsuyoshi Muramatsu