Apparatus for the manufacture of transversely contoured tubing f

Details Apparatus for the manufacture of transversely contoured tubing f Apparatus for the manufacture of transversely contoured tubing f

1979-07-03

1980-07-15

Danison, Walter C.

Plastic article or earthenware shaping or treating: apparatus

Diverse distinct type shaping means

Shaping orifice and either a downstream preform reshaping...

264508, 264563, 264564, 425233, 425325, 425369, 425371, 425392, 425396, B29C 1707, B29D 722

Patent

active

042126185

ABSTRACT:
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 transverse 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 circulation, the first two mold halves are moved apart and out of the molding run 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.

REFERENCES:
patent: 3557404 (1971-01-01), Zippel et al.
patent: 3751541 (1973-08-01), Hegler
patent: 3776679 (1973-12-01), Hegler
patent: 3859025 (1975-01-01), Maroschak
patent: 3981663 (1976-09-01), Lupke
patent: 3996323 (1976-12-01), Hegler et al.
patent: 4021178 (1977-05-01), Braun
patent: 4147809 (1979-04-01), Thompson

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