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Self-regulating brake apparatus for weft-feeding device

A technology of braking device and weft feeder, applied in the directions of transportation and packaging, textiles, textiles and papermaking, etc., can solve the problems of complex structure of the braking body, increase the size and mass of the braking body, etc., so as to reduce the mass and reduce the inertia. Effect

Inactive Publication Date: 2006-11-29
L G L ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The main drawback of these embodiments is that the construction of the braking body is complicated and, at the most fundamental level, increases the size and mass of the braking body, the inertia of which reaches values ​​that are also unacceptable for a correct and effective self-regulating operation of the braking system

Method used

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  • Self-regulating brake apparatus for weft-feeding device
  • Self-regulating brake apparatus for weft-feeding device
  • Self-regulating brake apparatus for weft-feeding device

Examples

Experimental program
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Effect test

Embodiment Construction

[0030] see first figure 1 To 6, reference numeral 10 represents a traditional weft feeder, which includes a fixed drum 11, and a hollow arm rigidly connected with a rotating disc 12 mounted on the base of the drum is wound on the fixed drum 11 in the form of a fishing reel, so that The weft thread is stored in the form of multiple turns of the thread SF. In a manner known per se, when the weaving machine (not shown) requires the yarn F during weft insertion, the yarn F is released from the drum and passed through a thread guide element 13 coaxial with the drum; During the unwinding movement, the yarn is subjected to the action of the self-adjusting device 14 . The device is designed to maintain tension in the yarn by self-adjusting braking action to create a constant or substantially constant tension in the yarn as the yarn advance speed changes during insertion.

[0031] To this end, the device 14 located between the drum 11 and the yarn guide element 13 comprises a frusto-...

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PUM

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Abstract

A self-adjusting braking device for weft feeders, comprising a frustum-shaped braking body (15) that acts on a thread, is suspended elastically in front of the drum (11) of the feeder and is pushed into elastic tangent contact with the drum along an exit circumference (CU) of the drum. The braking body (15) has, at a larger-diameter region (R) thereof designed to make contact with the drum (11), a discontinuous annular contact element (20), with a plurality of through slits (21) which are arranged so as to be equidistant and delimit a row of contact laminas (22).

Description

technical field [0001] The present invention relates generally to self-adjusting brakes for use with apparatus for feeding weft yarn to textile machines, particularly gripper or plug-type textile machines. [0002] In particular, the present invention relates to self-adjusting braking devices of the type described in European patent EP-0536088 and Italian patent 1,259,567, which will be briefly referred to below as conventional devices. Background technique [0003] A weft feeder is a device used in the weaving process, usually consisting of a fixed cylindrical drum on which an arm rotating in the manner of a fishing reel winds multiple coils of yarn, which constitute the weft storage; the means of advancing towards the end of the drum; and the braking means at the outlet end, for braking the yarn, as required in looms and the like, for releasing the yarn from the drum at each weft insertion, by This provides the correct mechanical tension, which is essential for correct un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D03D47/34B65H51/22D03D47/36
CPCD03D47/364
Inventor P·泽诺尼R·卡斯泰利G·佩德里尼
Owner L G L ELECTRONICS