Apparatus for the manufacture of transversely contoured...

Details Apparatus for the manufacture of transversely contoured... Apparatus for the manufacture of transversely contoured...

B - Operations, Transporting

29

D

18/522.5

B29D 23/18 (2006.01) B29C 49/00 (2006.01) B29C 35/16 (2006.01) B29C 49/48 (2006.01)

Patent

CA 1128265

Abstract of the Invention An apparatus for the manufacture of transversely contoured tubing from thermoplastic material. The tube emerges in the plastic state from an extrusion nozzle and is guided into a mold composed of a plurality of mold sections in series, with inner side working surfaces forming the trans- verse contours. Each of the mold sections is composed of two mold halves which are arrayed along a straight molding run in two confronting rows and which are circulated. In the circu- lation, the first two halves are moved apart and out of the molding at the end of the molding run and are guided to a return run on which they are separately returned to the beginning of the molding run where they are rejoined to the preceding mold half. The mold halves are guided on the return run in a continuous. accelerated and then decelerated movement by a transfer mechanism which couples and uncouples from the mold halves as actuated by pneumatic cylinders under the control of limit switches.

331886

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