Method for making a flexible corrugated rubber tubing with inter

Details Method for making a flexible corrugated rubber tubing with inter Method for making a flexible corrugated rubber tubing with inter

1986-01-27

1986-12-23

Silbaugh, Jan

Metal working

Method of mechanical manufacture

Assembling or joining

29456, 264507, B23P 1102, B29C 6564

Patent

active

046303502

ABSTRACT:
A method for making flexible, corrugated rubber tubing with internal reinforcement. An extruded sleeve of uncured rubber is slid axially onto an elongated internal forming member, after which an external forming means is placed around the assembled sleeve and used to form corrugations. The resulting product is heat-treated to set the corrugations and thus to form a flexible corrugated tube length. A helix formed of flexible, resilient wire rod is pulled through the corrugated tubing in an axial direction and simultaneously rotated in a direction to thread the helical rod into the internal helical groove in the corrugated product. At the same time, the helix is axially extended to reduce its helix diameter. When the helix has been completely extended through the corrugated tubing, it is released to that it expands radially into tight conformance with the internal helical groove.

REFERENCES:
patent: 2897840 (1959-08-01), Roberts et al.
patent: 4091063 (1978-05-01), Logan
patent: 4182019 (1980-01-01), Tally et al.

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