METHOD FOR MANUFACTURING PIPE, PIPE, AND IMAGE FORMING DEVICE USING THIS PIPE

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a pipe capable of manufacturing the pipe at a low cost dispending with adjustment and the like of the processing method caused by the existence of a notched part even when forming the notched part necessary for functioning on the folded line of a metal plate. SOLUTION: In the method for manufacturing the pipe, the pipe is manufactured by closely contacting a pair of sides 6e, 6e with each other by applying external force to neighboring face constituting wall parts 16a, 16b of a secondary intermediate molded article 14 so that a spring-back force for maintaining this close contact state remains. In the processing step for molding the secondary intermediate molded article 14, the length of the part excluding the notched part 80 of the folded line 6d1dividing one constituting wall part 15 and the neighboring face constituting wall part 16a and the length of the part excluding the notched part 81 of the folded line 6d2dividing one constituting wall 15 and the neighboring face constituting wall part 16b are made nearly equal. COPYRIGHT: (C)2003,JPO