Patent ID: 8763250
Filing Date: 2014-07-01
Classification: B29C,B29L,F16L,Y10T

Abstract:
1. A method for producing a pipe having walls, comprising: providing at least one channel between ends of said wall, wherein said at least one channel passes through said wall, blow moulding a tube blank composed at least in part of plastic in a blow-moulding tool, wherein the blow-moulding tool has a convexity for each of the at least one channel, wherein the convexity lines the tube blank and internal measurements of the convexity are greater than exterior measurements of each of the at least one channel, crushing the tube blank in a not-yet-solidified state in a region of the convexity by a crush-moulding tool such that for each of the at least one channels a rough channel results that communicates with an interior of the pipe, wherein the rough channel is closed on an end distant from the pipe interior and has the exterior measurement of each of the at least one channel with the exception of a desired channel length, cutting the crushed tube blank in a solidified state in a region of each rough channel with a cutting tool in such a manner that subsequent thereto, each of the individual at least one channels are open and have the desired channel length, and impinging with pressure during the crush-moulding process, the pipe interior, wherein the pressure is a blow-moulding pressure.