| 摘要 |
PURPOSE:To manufacture a corrugated the equipped with a synthetic resin flange by a method wherein a resin block is formed so as to ride over both sides of a designed position of forming the flange while the block is cut together with the wall of the tube. CONSTITUTION:A designed area for forming flanges, whose width is two times of the flanges 6 having necessary widths (w), is provided so as to cover both sides of the designed position (a) of the cutting of a corrugate tube 1, made of synthetic resin material and formed with corrugated tube wall 2 around the outer peripheral surface thereof. Synthetic resin block 60, having a width (2w) which is two times of the width (w) of a predetermined flange, is formed on the troughs 3 and the crests 5 of the corrugation. Thereafter, the resin block 60 and the corrugate tube wall 2 are cut along the designed position (a) of cutting whereby the corrugate tube, equipped with a synthetic resin flange, may be manufactured. |
