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Drafting arrangement for power looms

A pulling device and suction port technology, applied in spinning machines, drafting equipment, textiles and papermaking, etc., can solve the problems of reducing the fiber suction effect due to the distance, damage to the elastic drum cover, and difficulty in removing fibers. Reliability benefits, the effect of reducing the formation of severe entanglement

Inactive Publication Date: 2007-04-04
HLDG FUR INDUSTRIBETEILIGUNGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increased distance leads to a greatly reduced suction effect on the fibers, and it often happens that the fibers do not enter the suction opening but wind up on the elastic hood of the delivery squeeze roller
Such fiber entanglements are difficult to remove and often result in damage to the elastic roller cover and other parts of the puller

Method used

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  • Drafting arrangement for power looms
  • Drafting arrangement for power looms
  • Drafting arrangement for power looms

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Figure 1 schematically shows an example embodiment of a drawing device of a spinning machine, in which a supplied sliver F is stretched to a desired degree. This is especially the case with double-layer belt draws (Doppelriemchenstreckwerk) of ring spinning machines. The traction device shown serves only to explain the field of application of the invention described hereinafter and is limited to the details necessary for an understanding. The traction device generally indicated by the reference numeral 1 comprises a pair of input rollers 2 , a pair of middle rollers 3 and a pair of output rollers 4 . The double-layer belt rotating on the middle pair of rollers 3 is indicated by the reference number 33 . A fiber rake 5 can also be arranged before the output drum pair 4 and binds the drawn fibers together before they are twisted into yarn G by the spinning rotation R. Each roller pair 2 , 3 , 4 consists of a lower cylinder 21 , 31 , 41 and an associated squeeze roller 2...

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PUM

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Abstract

A drafting arrangement has a pair of output rollers (4) composed of a bottom roller (41) and of a delivery pressure roller (42) in contact along a delivery clamping line (43). In order to carry away unbonded fibres by aspiration, in particular in the event of thread breakage, the drafting arrangement is equipped with a fibre aspiration system (6) with an aspiration opening (61) which is arranged after the pair of outlet rollers (4) in the proximity of a transport path for the thread (G). The distance between the tangent drawn at the delivering clamping line (43) on the delivery pressure roller (42) and the aspiration opening (61) is smaller than the distance between the transport path for the thread (G) and the aspiration opening (61).

Description

technical field [0001] The invention relates to a drawing device according to the preamble of claim 1 for a spinning machine, in particular to a drawing device for a ring spinning machine. Background technique [0002] The conversion of natural and man-made fibers into yarn requires a series of steps. The final working step is usually called fine spinning. Thus, the spun yarn acquires its final fineness and strength. Fine spinning takes up a considerable amount of work in the overall yarn manufacturing process. It is known from the prior art that ring spinning in a staple fiber spinning machine is closest to conventional hand spinning with a spinning wheel. From this, the spun yarn is wound onto the rotating spinning spindle. Basically, three types of machines are required for ring spinning. In the primary spinning machine, the roving, also called carded sliver, is produced from a sliver, the so-called flyer. In the ring spinning machine, yarns of the desired fineness ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01H5/66
CPCD01H5/66
Inventor 汉斯·施塔勒克弗里德贝特·施密德
Owner HLDG FUR INDUSTRIBETEILIGUNGEN AG