MANUFACTURE OF GRANULE FILLING TUBE

摘要

PURPOSE:To provide a method for manufacturing the granule filling tube having no crack in a shell of the tube by obtaining a sound joined weld zone. CONSTITUTION:In the manufacturing method for granule filling tube for supplying a granule 20 to a tubular body 1 on the way of forming a metallic band plate to the tubular body 1, joining both edge faces 17 of the tubular body 1 by high frequency welding, and contracting the diameter of a weld tube 11 filled with the granule 20, a magnetic granule of a granule surface layer part 21 in the tubular body 1 is sucked magnetically and eliminated, in the process in which both edge faces 17 are welded after the granule 20 is supplied to the tubular body 1.