PLASTIC-METAL COMPOSITE PIPE COMPRISING A METALLIC DOUBLE ENVELOPE AND METHOD AND DEVICE FOR PRODUCING THE SAME

摘要

The invention relates to a plastic-metal composite pipe and a method and a device for producing the same. Said composite pipe comprises at least one plastic inner pipe and a metallic envelope surrounding the same, the inner peripheral surface of the metallic envelope being fixed to the outer peripheral surface of the plastic inner pipe and the metallic envelope consisting of a metal strip. According to the invention, opposing edges of the metal strip are guided over each other in such a way that the metallic envelope is double-layered over its entire periphery or is formed as a double envelope with two superimposed layers. A thermosetting bonding agent or adhesive can be used to create a connection with a material fit. The inventive method is carried out without any welding processes, enabling the composite pipe to be produced more economically, faster and without any defects. This opens up new fields of application, for example for composite pipes with extremely thin-walled metallic envelopes, for example in the field of automobile construction or in the heating or sanitary industry.