B - Operations – Transporting – 21 – K
Patent
B - Operations, Transporting
21
K
26/156
B21K 21/00 (2006.01) B21D 22/04 (2006.01) B21D 28/24 (2006.01) B21D 35/00 (2006.01) B21K 1/30 (2006.01) B21K 23/04 (2006.01) F16L 55/00 (2006.01)
Patent
CA 1081438
METHOD AND DEVICE FOR PRODUCING HOLLOW ARTICLES HAVING FLANGES ABSTRACT OF THE DISCLOSURE A material to be press-formed is confined in a space having a contour corresponding to the outer contour of the flange part of an article to be produced and is pressed between a member having a through hole correspond- ing to the outer contour of the hollow main part of the article and another member holding slidably a mandrel having an outer contour corresponding to the inner con- tour of the internal bore of the hollow article, the mandrel being simultaneously projected into the through hole of the first member. By the pressing action, the peripheral part of the material is formed into the flange part of the article while an inward flow of the material is caused, thereby elevating the surface of the material in the through hole and forming a recess in the opposite side surface of the material. The mandrel projected simultaneously with the pressing action aids the materi- al flow and the forming of the hollow main part of the article with minimal force. Modifications for producing articles having various configurations and for continuous production thereof are also disclosed.
289025
Kondo Kazuyoshi
Nakamura Yoshiaki
LandOfFree
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