Method and apparatus for forming a corrugated fluoropolymer tube
Number of patents in Portfolio can not be more than 2000
United States of America
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Jun 28, 2022
Grant Date -
Feb 28, 2019
app pub date -
Apr 13, 2016
filing date -
Apr 13, 2016
priority date (Note) -
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Abstract
A method of forming a corrugated fluoropolymer tube is disclosed. The method comprises the step of providing a tube comprising extruded fluoropolymer without corrugations or convolutions disposed on a mandrel. The mandrel has a first cylindrical portion and a flaring portion that extends to a second cylindrical portion, the second portion having an outer diameter which is larger than an outer diameter of the first portion. The method also includes the step of moving the tube on a longitudinal axis along the mandrel thereby forcing an outer surface of the tube into flights disposed at a pitch angle on a plurality of thread rollers which are rotating, the plurality of thread rollers adjacent to and circumferentially distributed around the flaring portion and/or second cylindrical portion of the mandrel, wherein external force is exerted on the outer surface of the tube to form corrugations having adjacent peaks and roots.
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