Method for manufacturing flexible tubes, involves longitudinal wrapping of flat laminate and inner layer on mold pins, and welding by overlapping on mold pins, where overlapped laminate and inner layer are coated and cut into desired length

摘要

The method involves longitudinal wrapping of a flat laminate and an inner aluminum layer on the mold pins, and welding by overlapping on the mold pins. The laminate has a thickness of 270 to 350 microns, while the inner aluminum layer has a thickness of 20 to 40 microns. The overlapped laminate and inner layer are coated with liquid polyethylene material, and is cut into desired lengths. The prepared tube is placed on a stick of the material that is heated to the temperature of 250 degree Celsius. A head is formed with a threaded portion during the welding of the tube.