Title:
PRODUCTION OF DELIVERY PIPE
Document Type and Number:
Japanese Patent JPH1171791
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To improve the production efficiency of a delivery pipe. SOLUTION: A through hole 22 is formed in a molded raw material 19 having a long pipe-shape and a steel ball 25 is arranged on the through hole 22 and the steel ball 25 is drawn out of the molded raw material 19. By drawing the steel ball, the molded raw material 19 at the peripheral edge of the through hole 22 is stretched outward to form a delivery opening. Thereafter, one end opening of the molded raw material 19 is closed by a press and the closed end is welded by brazing.
Inventors:
OTA YOSHIHISA
Application Number:
JP23484697A
Publication Date:
March 16, 1999
Filing Date:
August 29, 1997
Export Citation:
Assignee:
OTA YOSHIHISA
International Classes:
E03C1/042; B05B1/00; B21D19/08; B21D51/16; (IPC1-7): E03C1/042; B05B1/00; B21D19/08; B21D51/16
Attorney, Agent or Firm:
Hironobu Onda