Draft roller

A drafting roller and drafting device technology, which is applied in drafting equipment, textiles, papermaking, spinning machines, etc., can solve problems such as troubles and achieve cost-saving effects

Active Publication Date: 2009-06-24
MURATA MASCH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the above-mentioned drafting device has the troublesome problem of recombining the drafting rollers corresponding to the sliver every time the raw material of the sliver to be processed is changed.

Method used

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Embodiment Construction

[0032] Next, a spinning machine 100 according to an embodiment of the present invention will be described with reference to the drawings.

[0033] figure 1 It is a side sectional view showing the spinning machine 100 according to the embodiment of the present invention.

[0034] The spinning machine 100 has a sliver supply unit 1 , a drafting device 2 , an air spinning device 3 , a yarn feeding device 4 , a yarn defect detecting device 5 and a winding device 6 .

[0035] The sliver supply unit 1 is composed of a sliver 10 as a raw material, a sliver box 11 for storing the sliver 10 , and a sliver guide 12 for guiding the sliver 10 to the draft device 2 .

[0036] The drafting device 2 includes four pairs of drafting rollers that sandwich the sliver 10 and stretch it. The above four groups of drafting roller pairs are composed of a rear roller pair 21, a third roller pair 22, an intermediate roller pair 23 and a front roller pair 24, and each roller pair is arranged sequentia...

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PUM

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Abstract

The present invention provides a draft roller, irrespective of the material (yarn type) of a sliver to be processed, a generation of the cyclic unevenness caused by a groove pitch of a draft roller and an accumulation of foreign materials in the grooves during drafting process can be prevented. A draft roller (a first roller 22A) according to the present invention is provided in a draft device (2) of a spinning machine and has groove parts (71) formed on a roller surface (28) of the draft roller (a first roller 22A) and having an inclination relative to an axial direction of the draft roller (a first roller 22A), wherein given that a diameter of the draft roller (a first roller 22A) is R, the number of the groove parts (71) is N, an inclination relative to the axial direction of the groove parts (71) is theta, a fiber width of a sliver (10) processed by the draft device (2) is D and a circular constant is pi, the draft roller satisfies a relationship <Pi>R / N < Dtan<theta>.

Description

technical field [0001] The present invention relates to a technique of drafting rollers provided in a drafting device forming a spinning machine. Background technique [0002] Conventionally, in a drafting device used in a high-speed spinning machine, a pair of drafting rollers, a pair of rear rollers, a third roller, an intermediate roller, and a front roller, are sequentially arranged from upstream to downstream of the device. Each draft roller pair is composed of a driving roller that rotates by a driving source, and a driven roller that contacts and follows the driving roller. The driving roller is a metal roller, and the driven roller is a rubber roller. The sliver is drawn while being gripped by the driving roller and the driven roller from the vertical direction. [0003] The drafting device is a device that uses the speed difference between the drafting rollers to make the yarn thinner. Therefore, in order to securely hold the fibers, grooves are formed on the per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01H5/78
CPCD01H5/74D01H5/78
Inventor 太田成利坂元直孝
Owner MURATA MASCH LTD
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