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US 4,903,905 AGranted
Method of balancing a yarn winder
AssigneeToray Industries, Inc.
InventorsKatsumi Hasegawa, Michio Ohno, Akira Kadotsuji
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AssigneeToray Industries, Inc.
InventorsKatsumi Hasegawa, Michio Ohno, Akira Kadotsuji
Estimating the term…
A method of balancing a spindle in a yarn winder comprising, (a) a base for supporting a yarn take-up means, (b) the yarn take-up means including, (b-1) a spindle driving mechanism mounted to the base, (b-2) a long spindle comprising, (b-2-1) a bobbin holding portion more than 800 mm in length including a first cylindrical hollow body, a cylindrical and substantially solid body connected to the first cylindrical hollow body and a second cylindrical hollow body connected to the cylindrical solid body, and (b-2-2) a shaft extending from a center of the inner end of the cylindrical solid body along the axis thereof through the interior of the second cylindrical hollow body and projecting therefrom, the shaft being connected to the spindle driving mechanism, (b-3) bearing means for rotatably supporting the spindle on the base, and (b-4) a bobbin holding mechanism secured around the periphery of the bobbin holding portion, for detachably mounting thereon at least a bobbin for taking up a yarn, the steps which comprise balancing the bobbin holding portion dynamically by field-balancing carried out by adjusting a test weight in each of at least three planes defined at opposition ends of the bobbin holding portion and an intermediate point therebetween, each of the weights being determined from sensing vibration data obtained by vibration testing carried out with and without an added test weight in each of said at least three planes extending at an angle to the axis of said spindle.
In a method of balancing a spindle in a yarn winder, wherein the yarn winder comprises:
In a method of balancing a spindle which is carried by a tubular supporting member and is more than 800 mm in length, said spindle exhibiting at least three critical speeds of excessive vibration as the speed of its rotation is brought up to running speed, said critical speeds comprising (a) a speed which is the critical speed of the spindle, (b) a greater and different speed which is the critical speed of the tubular supporting member, and (c) a still greater speed which is the critical speed of the bobbin holding portion of the spindle, the steps which comprises:
Dependencies are inferred from the claim text.