MANDREL OF COIL BOX
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United States of America Patent
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Issued Date -
Oct 22, 2015
app pub date -
Nov 20, 2013
filing date -
Dec 24, 2012
priority date (Note) -
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Abstract
A mandrel of a coil box comprises: a cylindrical mandrel body having a center shaft disposed therein and a slot into which a front end portion of a hot bar is inserted; and a guide part which is arranged towards the inside of the mandrel body from a peripheral wall of one side of the slot so as to prevent the cooling and plastic deformation of the front end portion of the bar inserted through the slot.
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