Title:
異形断面を有する管材の押出成形方法および管材押出成形用ダイス
Document Type and Number:
Japanese Patent JP4386321
Kind Code:
B2
Abstract:
The invention provides an extrusion molding process and a die for tube extrusion molding wherein a tube having an intermediate wall extended in a direction which crosses a direction in which the width of a tube varies can be formed easily and at a low cost. To achieve this, a die for tube extrusion molding is provided with a fixed die (38) and a movable variable die (39) and a tube is formed by material extruded from an opening (50) formed by the superposition in the direction of extrusion of a fixed die hole and a variable die hole. The opening (50) has an opening for a tube wall (51) forming the wall of the tube and openings for two intermediate walls (52) forming connecting walls in the inside space of the tube, the tube is composed of a part having the connecting wall and a part having no connecting wall by opening or blocking the opening for the intermediate wall (52) by the cores (44b and 47b) according to the amount of the movement of the variable die (39) and the tube different in the rigidity in the longitudinal direction is formed.
Inventors:
Yoshitaka Yanagibashi
Good stars
Good stars
Application Number:
JP2001024920A
Publication Date:
December 16, 2009
Filing Date:
January 31, 2001
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
B21C25/08; B21C23/08; B21C25/02; B62K11/02; B62K19/06
Domestic Patent References:
| JP2000136596A | ||||
| JP5031527A | ||||
| JP10286619A |
Attorney, Agent or Firm:
Nozomi Gangwon
Nakamura Kun
Nakamura Kun