Mandrel of high frequency heating type and method for producing cured rubber hose using same
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United States of America Patent
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Sep 28, 1999
Grant Date -
N/A
app pub date -
Aug 28, 1997
filing date -
Aug 29, 1996
priority date (Note) -
Expired
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Abstract
A mandrel of a high frequency heating type, comprising a conductive layer comprising a metal member having an aspect ratio of at least 100, in a proportion of at least 60% by volume, and a surface layer formed thereon which is made from an organic polymer, and a method for producing a rubber hose using the mandrel. Inasmuch as the inventive mandrel enables heating the curable rubber extruded on the mandrel, from the inner surface side thereof, the curing time of the rubber can be drastically reduced. Moreover, since the surface layer of the mandrel is composed of an organic polymer, the mandrel can be easily pulled out from the cured rubber layer. The production method of the present invention is free of the difficulty in heating the inside of the rubber layer. The concurrent application of external heating has accomplished continuous production of rubber hose.
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