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Storage yarn feeder with rotating bobbin and yarn unwinding sensor

A feeder and spool technology, applied in the field of storing yarn feeders, can solve the problems of uneven overlapping of yarn loops, yarn accumulation, defects, etc.

Active Publication Date: 2019-04-02
L G L ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, stock reductions below optimal levels can cause excessive yarn tension rises, leading to defects in the final product
Conversely, inventory growth beyond optimum levels can cause yarn to accumulate at the delivery end of the bobbin, causing the yarn coils to overlap unevenly, with the result that the feeding process is abnormal

Method used

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  • Storage yarn feeder with rotating bobbin and yarn unwinding sensor
  • Storage yarn feeder with rotating bobbin and yarn unwinding sensor
  • Storage yarn feeder with rotating bobbin and yarn unwinding sensor

Examples

Experimental program
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Effect test

Embodiment Construction

[0045] With reference to the above figures, the stored yarn feeder 10 comprises a yarn winding reel 12 having wound thereon a plurality of turns of the yarn Y forming a stock S, and according to an overall downstream machine (not shown) out), the yarn Y is suitable for winding. As the yarn is unwound from the spool 12, the motor 14 turns the spool 12 to pull fresh yarn from the spool (not shown) and wind it on itself in a new coil.

[0046] Such as figure 2 As shown, the motor 14 is housed within a motor housing 16 of the feeder 10 and includes an annular stator 18 secured within the motor housing 16 and a rotor 20 inserted within the annular stator 18 and fitted to a hollow drive shaft 22 . A hollow drive shaft 22 is supported within the motor housing 16 by a pair of rolling bearings 24, 26 and protrudes outside the motor housing 16 with a protruding portion 22a having the bobbin 12 keyed thereto.

[0047] The bobbin 12 comprises coil separation means 28 adapted to keep th...

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PUM

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Abstract

A motorized, yarn-winding rotary drum (12) rotatably supported with respect to a motor-housing (16) is adapted to have a plurality of yarn loops (Y) wound on itself, which are adapted to be unwound upon request from a downstream machine. A yarn-unwinding sensor counts the yarn loops unwinding from the rotary drum (12) and comprises light-emitting means (42) and light-receiving means (44), both integral with the motor-housing (16), one of which has an annular configuration operatively facing an annular surface (30a) of the rotary drum (12) from which the yarn is unwound. Light-guiding means (66) integral with the rotary drum (12) guide the light from the light-emitting means (42) to the light-receiving means (44) through a light passage (30c) defined on the annular surface (30a). The unwinding of yarn from the rotary drum (12) is determined on the basis of the light dimming resulting from the yarn transiting on the light passage (30c).

Description

technical field [0001] The invention relates to a stored yarn feeder with a rotating bobbin and a yarn unwinding sensor. Background technique [0002] It is known that in the weaving process yarn is fed to textile machines, eg circular looms, by means of a number of so-called "storage" yarn feeders. The stored yarn feeder is usually provided with a take-up spool having multiple turns of yarn wound thereon which are adapted to be unwound as soon as the downstream machine requires it. As the yarn is unwound from the bobbin, the yarn can be loaded in two ways: by reloading with a motorized swivel arm turning about an axis coaxial with the axis of the bobbin, or by a feeder as considered herein In the case of , reloading is done by driving the spool in rotation, in which case the spool must be motorized. [0003] As is well known to those skilled in the art, it is very important to keep the amount of yarn stored on the bobbin substantially constant at an optimal level in order...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65H51/22B65H63/00
CPCD04B15/482
Inventor G·贝尔托奇M·瓦瑞施第Z·彼得罗
Owner L G L ELECTRONICS