Feeder of yarn with accumulation, with magnetic brake

FIELD: textile.

SUBSTANCE: device for supply of yarn with accumulation for textile applications comprises housing with drum, on which yarn windings are placed, coming from bobbin, braking element, relating to type using magnets, tension sensor for measuring tension value of coming yarn, wherein braking element comprises first permanent magnet and fixed second magnet, control means to change exposure, applied by second magnet to first permanent magnet, and control unit, controlling means of control. First magnet is ring-shaped and moving parallel to axis of drums and along it between first position, in which first permanent magnet allows yarn pressing to counter-acting element, attached to drum, and second position, in which this action does not emerge, wherein control unit receives values of tension, measured by tension sensor, compares them with preset value and affects in real time said control means to adjust tension value to preset value, when these two values do not coincide.

EFFECT: supply of yarn.

13 cl, 4 dwg

 



 

Same patents:

FIELD: textile industry.

SUBSTANCE: apparatus for controlled feeding of thread to textile machine, wherein said thread is periodically acted upon, has means for determining tension and means for adjusting thread feeding speed, said means being connected to controlling and regulating devices for determining said tension and speed parameters, by means of which values both parameters are constantly measured during feeding of thread to textile machine so as to act upon rotating member in order to regulate thread tension, when necessary. Method involves imparting movement to rotating member in controlled manner in two opposite directions of rotation for feeding thread to textile machine or for repeated winding of thread on rotating member to prevent thread from accumulation thereon; maintaining tension of thread fed or repeatedly wound at constant value.

EFFECT: increased efficiency by providing constant thread tension.

23 cl, 3 dwg

FIELD: thread feeding equipment for textile machines.

SUBSTANCE: thread feeding apparatus has plastic casing preferably consisting of two bowl-shaped parts. Plastic fastening device is provided at machine side for connection to holder. Fastening device is formed in corresponding manner to impart required rigidity thereto and lacks metal inserts. Both casing parts are equipped with respective bearings for shaft extending therethrough. Thread feeding drum is mounted at one end of shaft and drive device, for example drive sheaves, is arranged at other end of shaft. Fastening devices are adapted for holding casing parts together in correct position thereof. In order to maintain thread feeding apparatus, casing may be readily opened.

EFFECT: increased efficiency and reduced manufacture costs.

15 cl, 14 dwg

FIELD: sewing industry.

SUBSTANCE: thread feeding apparatus has at least one thread spotting lever positioned for displacement on casing. Thread spotting lever is positioned for displacement between operating position and signaling position. When thread guide defining thread detecting device is in operating position, it is substantially aligned with thread guiding member, for example, eyelets of thread guiding members. In the region above operating position in the course of motion, thread spotter encounters stop, behind which it may not be shifted by thread. To provide for access to thread guiding members, in particular for thread charging, thread spotter lever is made resilient. Lower end of thread spotting lever may be manually moved upward behind stop for defining free space between thread guiding members.

EFFECT: increased efficiency and improved access to thread guiding members.

11 cl, 9 dwg

The invention relates to the textile industry and can be used in weaving and knitting machines

FIELD: sewing industry.

SUBSTANCE: thread feeding apparatus has at least one thread spotting lever positioned for displacement on casing. Thread spotting lever is positioned for displacement between operating position and signaling position. When thread guide defining thread detecting device is in operating position, it is substantially aligned with thread guiding member, for example, eyelets of thread guiding members. In the region above operating position in the course of motion, thread spotter encounters stop, behind which it may not be shifted by thread. To provide for access to thread guiding members, in particular for thread charging, thread spotter lever is made resilient. Lower end of thread spotting lever may be manually moved upward behind stop for defining free space between thread guiding members.

EFFECT: increased efficiency and improved access to thread guiding members.

11 cl, 9 dwg

FIELD: thread feeding equipment for textile machines.

SUBSTANCE: thread feeding apparatus has plastic casing preferably consisting of two bowl-shaped parts. Plastic fastening device is provided at machine side for connection to holder. Fastening device is formed in corresponding manner to impart required rigidity thereto and lacks metal inserts. Both casing parts are equipped with respective bearings for shaft extending therethrough. Thread feeding drum is mounted at one end of shaft and drive device, for example drive sheaves, is arranged at other end of shaft. Fastening devices are adapted for holding casing parts together in correct position thereof. In order to maintain thread feeding apparatus, casing may be readily opened.

EFFECT: increased efficiency and reduced manufacture costs.

15 cl, 14 dwg

FIELD: textile industry.

SUBSTANCE: apparatus for controlled feeding of thread to textile machine, wherein said thread is periodically acted upon, has means for determining tension and means for adjusting thread feeding speed, said means being connected to controlling and regulating devices for determining said tension and speed parameters, by means of which values both parameters are constantly measured during feeding of thread to textile machine so as to act upon rotating member in order to regulate thread tension, when necessary. Method involves imparting movement to rotating member in controlled manner in two opposite directions of rotation for feeding thread to textile machine or for repeated winding of thread on rotating member to prevent thread from accumulation thereon; maintaining tension of thread fed or repeatedly wound at constant value.

EFFECT: increased efficiency by providing constant thread tension.

23 cl, 3 dwg

FIELD: textile and paper.

SUBSTANCE: method for supplying thread (F) to textile machine (100) without creating torsions thereof, which comprises picking up thread (F) from a reel, winding the thread on rotary drum (5) driven by electric motor (6) thereof and supplying such thread (F) to the textile machine, at constant tension and/or quantity. Method also comprises measuring the amount of thread (F) leaving rotary drum (5), and the amount of thread wound thereon and intervening on the rotation of such drum, so the amount of thread leaving the drum is equivalent to the amount of thread loaded thereon to avoid the creating of torsions on the thread.

EFFECT: device for implementation of the above method is also proposed.

10 cl, 3 dwg

FIELD: textile.

SUBSTANCE: device for supply of yarn with accumulation for textile applications comprises housing with drum, on which yarn windings are placed, coming from bobbin, braking element, relating to type using magnets, tension sensor for measuring tension value of coming yarn, wherein braking element comprises first permanent magnet and fixed second magnet, control means to change exposure, applied by second magnet to first permanent magnet, and control unit, controlling means of control. First magnet is ring-shaped and moving parallel to axis of drums and along it between first position, in which first permanent magnet allows yarn pressing to counter-acting element, attached to drum, and second position, in which this action does not emerge, wherein control unit receives values of tension, measured by tension sensor, compares them with preset value and affects in real time said control means to adjust tension value to preset value, when these two values do not coincide.

EFFECT: supply of yarn.

13 cl, 4 dwg

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