Method of and device for producing multi-layer pipes

Details Method of and device for producing multi-layer pipes Method of and device for producing multi-layer pipes

B - Operations, Transporting

21

C

26/155

B21C 37/12 (2006.01)

Patent

CA 1117749

TITLE OF THE INVENTION METHOD AND DEVICE FOR PRODUCING MULTI-LAYER PIPES ABSTRACT OF THE DISCLOSURE: A method of and device for producing multi-layer pipes by helically winding a plurality of bands loosely arranged one above the other, which are individually withdrawn from a supply straightened out, trimmed and in the form of a band loop are conveyed to the forming station at the respective the angle of lead-in corresponding to the respective pipe diameter, whereupon the layers are together welded to form a pipe strand which is subsequently cut into individual pipes. All bands are supplied and advanced independently of the irregularities of the respective longitudinal band edge shape in steadily straight lead-in directions, and all band edges are machined together to a possible maximum width in coordination with each other whereupon the bands are driven together while the welding gap is controlled in conformity with their band edge shape merely by pivoting the pipe.

312847

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