B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/943
B29C 47/90 (2006.01) B29C 47/00 (2006.01) B29C 47/12 (2006.01) B29C 47/88 (2006.01)
Patent
CA 2039736
Abstract of the Disclosure The invention relates to a method and apparatus for manufacturing ribbed pipes, wherein a formable mass in a plastic state is extruded into a substantially cylin- drical forming space of a corrugator (12), said forming space being delimited by forming means, i.e. moulds (17), movable in the production direction of the apparatus and having grooves on the inner surface thereof for forming rib flanges (10), and a stationary kernel (16) forming the inner surface of the pipe, and wherein the mass formed as a pipe (18) in the forming space is cooled. In accordance with the invention, the ribbed pipe (18) is cooled from the inner surface of the pipe with the kernel (16) which extends an essential length externally of the forming space cons- tituted by the forming means (17) of the corrugator (12). (Figure 3)
Agren Lennart
Holso Eino
Holso Paul
Jarvenkyla Jyri
Scharwachter Dieter
Cassan Maclean
Uponor Innovation Ab
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