Verfahren zum Ummanteln eines Kunststoffrohres mit einem Metallband

摘要

A method for wrapping a metal strip around a plastic tube whereby the longitudinal edges (32) of a metal strip (20) are bent substantially at an angle of 90 DEG on a common side of the metal strip (20). The metal strip (20) with the bent longitudinal edges (32) is placed around a plastic inner tube (14) thereby forming a tube with longitudinal edges (32) running in an axial direction. The bent longitudinal edges (32) touch each other and protrude in a substantially radial manner. The bent edges (32) of the longitudinal strip (20) placed around the plastic inner tube (14) are trimmed while their projecting end is reduced. The longitudinal edges (32) are welded together. The volume of the bent longitudinal edges (32) and the welding energy are chosen in such a way that the longitudinal seam-welded metal strip (20) has an outer surface (50) which, after welding in the area of the longitudinal seam (46), is located on the outer peripheral surface (48) of the metal wrapper (16).