EP3696302A1 - Spinnverfahren und verfahren zum spinnen von schlichtem garn und effektgarn mit dem besagten spinnsystem - Google Patents

Spinnverfahren und verfahren zum spinnen von schlichtem garn und effektgarn mit dem besagten spinnsystem Download PDF

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Publication number
EP3696302A1
EP3696302A1 EP19382096.6A EP19382096A EP3696302A1 EP 3696302 A1 EP3696302 A1 EP 3696302A1 EP 19382096 A EP19382096 A EP 19382096A EP 3696302 A1 EP3696302 A1 EP 3696302A1
Authority
EP
European Patent Office
Prior art keywords
drafting
roller
rollers
removable
spinning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19382096.6A
Other languages
English (en)
French (fr)
Inventor
Adrian SERRA TELLA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pinter Caipo SAU
Original Assignee
Pinter Caipo SAU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pinter Caipo SAU filed Critical Pinter Caipo SAU
Priority to EP19382096.6A priority Critical patent/EP3696302A1/de
Priority to PCT/EP2019/080117 priority patent/WO2020089486A1/en
Priority to CN201980086132.1A priority patent/CN113227475A/zh
Priority to EP19795033.0A priority patent/EP3874080A1/de
Priority to PCT/EP2020/053429 priority patent/WO2020165143A1/en
Publication of EP3696302A1 publication Critical patent/EP3696302A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/34—Yarns or threads having slubs, knops, spirals, loops, tufts, or other irregular or decorative effects, i.e. effect yarns
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D01H13/18—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only
    • D01H13/187—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only using means stopping the driving of the drafting, guiding cylinders, e.g. friction clutches
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
    • D01H5/88—Cradles; Tensors
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/22—Driving or stopping arrangements for rollers of drafting machines; Roller speed control

Definitions

  • the present invention generally relates to a spinning system for spinning either fancy yarn or plain yarn in a ring spinning machine.
  • the present invention relates also to a method of spinning plain yarn o fancy yarn with the claimed spinning system.
  • Existing spinning machines for manufacturing plain yarn include roving stop devices with detent elements configured to act on back drafting rollers to detent movement of back upper drafting roller upon detection of a signal coming either from a mechanical or electrical or electromagnetic sensor monitoring the breakage of yarn passing through the spindle assembly.
  • Patent document US 4501114A discloses one of these existing spinning machines. In the active position of the detent element, the roving that is being fed is clamped between the pair of back drafting rollers whereby a roving break occurs. The broken stretch of roving keeps caught between the front pair and middle pair of drafting rollers.
  • this broken stretch of roving must be air suctioned by means of pneumatic suctioning devices arranged below the front pair of drafting rollers.
  • the suction of air prevents the broken stretch of roving from being bundled around the bottom front roller, however suctioning devices have the drawback that entail continuous energy consumption.
  • Patent WO2015/033811 discloses a production method of fancy yarn wherein the feeding of a first type of roving and a second type of roving is operated to form a yarn that combines different blending ratios of these two types of roving.
  • This fancy yarn production method requires the use of a drafting assembly with a middle bottom apron wrapped around a middle bottom drafting roller and an apron profile, and a back bottom apron arranged adjacent the middle bottom apron and wrapped around the back bottom drafting roller and the same apron profile.
  • Top aprons of the same drafting assembly are wrapped around upper middle and back drafting rollers and apron cradles mounted on a top arm of the drafting assembly.
  • the objective of the present invention is that of providing a spinning system for a ring spinning machine, and a method for spinning plain yarn and fancy yarn with the claimed system, that overcome the above-mentioned shortcomings.
  • the present invention provides a spinning system for a ring spinning machine, comprising a drafting assembly and a device for stopping the supply of roving to said drafting assembly upon breakage of a yarn intended to be fed to a spindle assembly, characterised in that said drafting assembly comprises;
  • a spinning system is provided with a drafting assembly wherein removable first and second drafting rollers are able to operate as middle and back bottom rollers over the existing bottom rollers of the ring spinning machine.
  • middle and back bottom drafting aprons can be wrapped around those first and second drafting rollers so that existing middle and back bottom drafting rollers keep clear of aprons to allow two detent elements of a roving stop device to act on said first and second removable drafting rollers upon breakage of a yarn to stop the supply of roving to the drafting assembly.
  • the claimed features in the active position of the roving stop device, the roving that is being fed is held fixed between the apron pair in the main drafting zone so that a roving break occurs close to the front drafting rollers.
  • the roving ends are found at an easy accessible and forward position whereby reengagement can be done very easy.
  • the spinning system is particularly advantageous when spinning fancy yarn since this method of spinning supplies two adjacent strands of roving at each spinning position.
  • said first and second drafting rollers are coupled to a roller apron support removable attached to the drafting frame of the spinning machine and, advantageously, said roller apron support includes an apron profile for at least one apron to be wrapped around said first drafting roller and/or said second drafting roller and said apron profile.
  • the first and second removable drafting rollers may act as middle and back bottom rollers configured for spinning either plain yarn or fancy yarn over the existing bottom rollers of the ring spinning machine when the cited removable roller support is attached to the drafting frame of the ring spinning machine.
  • middle and back bottom drafting aprons wrapped around those first and second drafting rollers, when manufacturing either plain yarn or fancy yarn, can be easily replaced by removing the roller apron support while the existing bottom rollers of the drafting frame keep running.
  • the claimed system allows a roving stop device to be arranged below the drafting assembly to act on said removable first and second drafting rollers.
  • a roving stop device to be arranged below the drafting assembly to act on said removable first and second drafting rollers.
  • the claimed system comprises one drafting apron configured for drafting a pre-drafted roving, wherein said drafting apron is wrapped around said first drafting roller acting as a middle bottom drafting roller over an existing middle bottom drafting roller of said spinning machine.
  • This embodiment is suitable for spinning a yarn wherein a pre-drafted roving is drafted in a spinning position by means of one drafting apron wrapped around said first drafting roller and the apron profile of the roller apron support.
  • This single drafting apron is controlled for the start and stop thereof during spinning by controlling operation of the existing middle bottom rollers of the drafting frame which are responsible for operating the first and second drafting rollers attached to the roller apron support.
  • the claimed system comprises;
  • This embodiment is suitable for a production method of fancy yarn as the one disclosed in patent WO2015/033811 , wherein feeding of a first type of roving and a second type of roving is operated to form a yarn that combines different sections of these two types of fibres.
  • a first roving is drafted by means of a first drafting apron wrapped around the first drafting roller and said apron profile
  • a second roving is drafted by means of said second drafting apron wrapped around the second drafting roller and the same apron profile.
  • the first and second aprons are controlled for the start and stop thereof during spinning by controlling the operation of the existing back and middle bottom rollers of the drafting frame so that feeding of roving is interrupted alternately to combine sections of different types of fibres in a single yarn.
  • the existing middle and back bottom rollers are responsible for operating the first and second drafting rollers attached to the roller apron support.
  • both adjacent roving ends are found at an easy accessible forward position so that reengagement can take place automatically.
  • broken stretches of roving are practically inexistent so loss of fibres is extremely reduced on restarting operation so is the energy consumption of the spinning machine.
  • the roller apron support wherein the first and second drafting rollers are removable coupled comprises a support arm where said first and second drafting rollers are attached, and a rear end of said support arm pivotally attached to the drafting frame of the spinning machine.
  • the roller apron support may be pivotally attached to a bar of the drafting frame which is arranged behind the back bottom drafting roller so that the support arm is able to rotate from a working drafting position to an upper resting position to facilitate removing the drafting aprons.
  • the removable roller apron support is a one-piece support wherein a first portion of said piece defines the apron profile and a second portion of the same piece defines this support arm.
  • the body of the apron profile of the roller apron support defines a fitting for receiving at least one drafting apron at a spinning position.
  • the support arm of the roller apron support is extendable for varying the distance between the first drafting roller and the second drafting roller attached to the support arm of the roller apron support.
  • the roller apron support adapts to different distances between existing middle and back bottom rollers of the existing drafting frame.
  • the distance between bottom drafting rollers of an existing drafting frame may be modified depending on the kind of fibres used to manufacture the yarn so as to obtain a yarn of maximum quality.
  • the claimed system preferably comprises;
  • the claimed spinning system has the advantage that allows most of the components needed for the production of fancy yarn to be removably attached to the roller apron support, which in turn is also removably attached to the drafting frame.
  • handling drafting components is easier and maintenance works consume much less time.
  • the claimed system comprises at least one second fibre condenser component removably attached to the roller apron support so that it remains located behind the second removable drafting roller at a spinning position.
  • This second fibre condenser component may be attached to the roller apron support by means of a bar that is removably attached to the back end of the roller apron support. This second fibre condenser component helps joining fibres of a bundle entering the drafting assembly.
  • the first removable drafting roller comprises a first roller portion with a recess for receiving the first drafting apron for drafting the first roving
  • the second removable drafting roller also comprises a first roller portion with a recess for receiving the second drafting apron for drafting the second roving at the same spinning position.
  • each of said first and second drafting rollers comprises a first roller portion of greater radius provided with the cited recess for receiving and guiding one drafting apron, and a second roller portion of smaller radius. Thanks to these features, adjacent drafting aprons remain in a correct and optimum working position without the risk one drafting apron overlaps the other.
  • the drafting assembly of the claimed system comprises a drafting frame wherein the working position of the existing front bottom drafting rollers is configured for said first and second drafting rollers to be able to operate as middle and back bottom drafting rollers over the existing middle and back bottom drafting rollers by means of a raiser.
  • This raiser is arranged to raise the working position of the existing front bottom drafting roller for said existing front bottom drafting roller to be able to receive a roving coming from said first and/or second drafting rollers.
  • the working position of the existing middle and back bottom drafting rollers can be modified to a lower position whereas the working position of the existing front bottom drafting roller is not modified.
  • a raiser has the advantage that allows the working position of the existing front roller to be easily adapted to receive bundles of fibres coming from the removable first and second drafting rollers mounted on the roller apron support. In this manner, the working position of the existing back and middle bottom drafting rollers does not need to be modified to a lower position, nor the corresponding actuation and transmission mechanisms.
  • the drafting assembly of the claimed system is suitable for working two adjacent spinning positions with a common removable roller apron support.
  • Said drafting assembly comprises;
  • the support arm of the roller apron support is arranged centred between each pair of said first and second removable drafting rollers, and advantageously, the apron profile is dimensioned to extend between two adjacent spinning positions.
  • the means for stopping the movement of the first and second removable drafting rollers comprise;
  • said first and second detent elements are configured as a wedge arranged to be inserted, in its active position, between an existing middle or back bottom drafting roller and its corresponding first or second drafting roller, to stop the supply of roving upon breakage of the yarn.
  • the existing middle and back bottom drafting rollers operate as drive rollers. In its active position the wedge is inserted to raise the first or second drafting roller so that said first and second removable drafting rollers can loss transmission of movement from the driver rollers to detent the supply of roving.
  • said means for activating the displacement of said first and second detent elements comprise a slide arranged to cooperate with a trigger activating the displacement of said slide upon breakage of the yarn.
  • first and second detent elements are articulately attached to said slide so that upon the trigger activates the movement of the slide said first and second detent elements rotate to its active position in which these detent elements become inserted between the existing middle and back bottom drafting rollers and its corresponding first and second removable drafting roller.
  • said means for activating the displacement of said first and second detent elements to its active positions comprise process and control means for detecting a signal coming from an optical sensor arranged to detect absence or change of movement of the spindle upon breakage of the yarn intended to be fed to said spindle at a spinning position.
  • the traveller moves along a ring arranged coaxially the spindle. From here the thread is attached to the existing thread on the spindle.
  • the traveller, and the spindle share the same axis but rotate at different speeds.
  • the spindle is driven and the traveller drags behind thus distributing the rotation between winding up on the spindle and twist into the yarn.
  • the cited optical sensor is arranged to detect absence or change of movement of the traveller upon breakage of the yarn.
  • the optical sensor comprises a light emitter (for example a LED) and a light receiver (for example a photo-transistor) configured to receive light reflected from the traveller to detect movement of said traveller along the ring arranged coaxially the spindle.
  • the optical sensor is arranged within a casing integrated within a support, the light emitter and light receiver protruding from the support to detect movement of the traveller.
  • the present invention provides a method of spinning plain yarn with the claimed system, comprising the steps of;
  • the present invention provides a method of spinning fancy yarn comprising the steps of;
  • Reengagement involves manually engaging the end of the yarn onto the front drafting rollers for the end of the yarn to re-join the roving ends upon resuming movement of the first and second removable drafting rollers. Movement of these first and second drafting rollers is resumed by reloading the roving stop device so that the first and second detent elements and the slide are displaced to a rest position.
  • the present invention provides a method of spinning eitherfancy yarn or plain yarn by using roving stop devices to monitor the breakage of roving.
  • the method dispenses with the use of fibre air suctioning devices.
  • broken stretches of roving are practically inexistent with the claimed system so that there is no need of air suctioning devices to suction these broken stretches of roving.
  • the present invention provides a drafting kit for drafting fibres of a fancy yarn on a ring spinning machine, that in a characteristic manner comprises;
  • This drafting kit constitutes in itself a claimable aspect of the present invention that can obtain independent protection.
  • This drafting kit permits an existing drafting frame to be easily adapted to a method of production of fancy yarn at a lower cost. Besides, the maintenance operations such as the replacing of bottom drafting aprons can be done very easily whereas the drafting frame keeps running. Additionally, handling of components necessary for drafting fibres is extremely reduced. Indeed, this drafting kit allows the existing drafting frame to dispense with fixed attachments for fibre condensers.
  • the above-mentioned drafting kit comprises;
  • the drafting kit further comprises at least one fibre condenser component removably attached to the roller apron support behind one of said second removable drafting rollers.
  • said fibre condenser and apron guiding components are attached to the removable apron support by means of a bar susceptible to be attached to a roller support arm of the roller apron support.
  • the body of the apron profile comprises a fitting for receiving both the first and second drafting aprons and, advantageously, said first and second removable drafting rollers each comprise a first portion of greater radius and a second portion of smaller radius, the first portion of greater radius including a recess for receiving one of said first or second drafting aprons.
  • the present invention provides a drafting kit for drafting fibres of a plain yarn on a ring spinning machine, that in a characteristic manner comprises;
  • This drafting kit constitutes in itself a claimable aspect of the present invention that can obtain independent protection.
  • This drafting kit permits an existing drafting frame to be easily adapted to a method of production of plain yarn at a lower cost. Besides, the maintenance operations such as the replacing of bottom drafting aprons can be done very easily whereas the drafting frame keeps running.
  • each of said drafting kits includes a raiser configured to be able to raise the working position of an existing front bottom drafting roller of said ring spinning machine for said existing front bottom drafting roller to be able to receive when in its raised working position, at least a bundle of fibres coming from said first and/or second removable drafting rollers mounted on said removable roller apron support.
  • the present invention provides a claimed system wherein the existing drafting assembly is easily and quickly made compatible with different methods of production of yarn by means of the above-mentioned drafting kits.
  • the existing drafting assembly may be used either to produce a fancy yarn combining different sections of different roving or to produce plain yarn (i.e. a yarn that combines pre-drafting and main drafting of fibres).
  • a drafting assembly for a ring spinning machine wherein said drafting assembly comprises a roller apron support removably attached to the drafting frame of the ring spinning machine and, in a characteristic manner;
  • this drafting assembly is easily and quickly made compatible with different methods of production of yarn.
  • the claimed drafting assembly may be used either to produce a fancy yarn combining different sections of different bundles of fibres or to produce plain yarn (i.e. a yarn that combines pre-drafting and main drafting of fibres). This is because either the first and second removable drafting rollers, or the drafting aprons wrapped around said drafting rollers, may be easily replaced depending on the type of spinning method.
  • the claimed drafting assembly comprises;
  • Fancy yarn shall be understood to be yarn formed from a first type of bundle of fibres and a second type of bundle of fibres, said first type of bundle of fibres being, for example, a bundle selected from among natural, artificial or synthetic fibres, and said second type of bundle of fibres being, for example, a bundle selected from among natural, artificial or synthetic fibres.
  • Yarn different from Fancy yarn, or Plain yarn shall be understood to mean a yarn manufactured including pre-drafting and main drafting of at least a roving by means of single middle bottom drafting apron wrapped around a middle bottom drafting roller.
  • Pre-drafting shall be understood to mean a drafting that takes place in between the back and the middle rollers.
  • Main drafting shall be understood to mean a drafting that takes place in between the middle and the front rollers.
  • Pre-drafting is necessary for ensuring quality of a yarn when this yarn is manufactured at each spinning position with a single drafting apron wrapped around a bottom middle roller.
  • Apron shall be understood to be an endless belt made from rubber or any other suitable material.
  • the apron helps in guiding the fibres from one drafting roller pair to other drafting roller pair of a drafting assembly.
  • Figures 1 to 6 show perspective and plan views of drafting kits 1A, 1B for using on the claimed spinning system either for manufacturing fancy yarn or for manufacturing plain yarn.
  • These drafting kits 1A, 1B include a removable roller apron support 2 with a support arm 3 which is arranged centred on the roller apron support 2 between a pair of first drafting rollers 4 and a pair of second drafting rollers 5.
  • An apron profile 6 is attached to the roller apron support 2 and is dimensioned to be able to extend between two adjacent spinning positions S1, S2 of the ring spinning machine.
  • first removable drafting rollers 4 are coupled on the roller apron support 2 in a forward position whereas the pair of second removable drafting rollers 5 are coupled in a backward position with respect to said first drafting rollers 4.
  • Both said first and second removable drafting rollers 4, 5 are mounted such as to be able to act at each spinning position S1, S2 as middle and back bottom drafting rollers over the existing middle and back bottom rollers 12, 13 of the ring spinning machine (see also figures of figures 8 , 9 and 11 , 12 ).
  • each drafting kit 1A, 1B is configured so as to be able to rotate attached to a bar 8 of the drafting frame 7 of the ring spinning machine.
  • this rear end 3a is configured such that it can be laterally displaced on the bar 8 of the drafting frame 7.
  • the drafting kits 1A, 1B may be easily positioned to match with the middle and back upper drafting rollers 32, 33 of a top arm of the existing drafting frame 7 of the ring spinning machine.
  • the claimed system has the particularity that the drafting frame 7 of the drafting assembly is modified such that the working position of the existing front bottom drafting rollers 14, or the working position of the existing middle and back bottom drafting rollers 12, 13, is configured for said first and second removable drafting rollers 4, 5 of the drafting kits 1A, 1B to be able to operate as middle and back bottom drafting rollers over the existing middle and back bottom drafting rollers 12, 13.
  • the drafting assembly includes a raiser 9 configured to be able to raise the working position of an existing front bottom drafting roller 14 for said existing front bottom drafting roller 14 to be able to receive at least a roving coming from said first and/or second removable drafting rollers 4, 5 mounted on the roller support apron 2 of the drafting kits 1A, 1B.
  • the working position of the existing middle and back bottom drafting rollers 12, 13 may be modified to a lower position whereas the working position of the existing front bottom drafting roller 14 is not modified.
  • Figures 1 to 4 represent a drafting kit 1A for using on an embodiment of the spinning system suitable for manufacturing fancy yarn (i.e., a yarn that combines different bundles of fibres in each single spinning position S1, S2).
  • This drafting kit 1A includes a roller apron support 2 with a first drafting apron 10a configured for drafting a first roving when wrapped around a first drafting roller 4 and the apron profile 6, and a second drafting apron 10b configured for drafting a second roving when wrapped around a second drafting roller 5 and the same apron profile 6, adjacent the first drafting apron 10a.
  • first and second drafting aprons 10a, 10b are controlled for the start and the stop thereof during spinning by controlling the operation of the existing middle and back bottom drafting rollers 12, 13 of the drafting frame 7 so that feeding of roving is interrupted alternately to combine sections of different types of fibres in a single yarn.
  • the claimed system includes, at each spinning position S1, S2;
  • these components may be attached to the roller apron support 2 by means of bars 22 which are secured to the support arm 3 wherein the first and second drafting rollers 4, 5 are attached.
  • the claimed system has the advantage that most of the components needed for the production of fancy yarn are removably attached to a roller apron support 2 of the drafting kit 1A, which in turn is also pivotally attached to the drafting frame 7 of the ring spinning machine. In this manner, handling drafting components is easier and maintenance works consume much less time.
  • Figures 3 and 4 show upper and lower perspective views of a roller apron support 2 of the drafting kit 1A comprising an apron profile 6 whose body defines fittings 24 for receiving and guiding the first and second drafting aprons 10a, 10b (which have not been represented on these figures 3 , 4 ).
  • the first and second removable drafting rollers 4, 5 are provided with first roller portions 4a, 5a of greater radius including recesses 25 for receiving and guiding in an optimum manner the first and second drafting aprons 10a, 10b of the drafting kit 1A for manufacturing fancy yarn.
  • Figures 5 and 6 show a drafting kit 1B suitable for producing a yarn different from fancy yarn, or a plain yarn, according to a method of production that includes pre-drafting and main drafting of at least a bundle of fibres at each spinning position S1, S2.
  • This embodiment includes a single drafting apron 18 configured for main drafting a roving when wrapped around a first drafting roller 4 and the apron profile 6.
  • the single drafting apron 18 is controlled for the start and the stop by controlling the operation of the existing middle 13 bottom roller of the drafting frame 7 of the ring spinning machine.
  • the roller apron support 2 of the drafting kit 1B includes an extendable support arm 3 for varying the distance between the first and second removable drafting rollers 4, 5 which are arranged over the existing middle and back drafting rollers of the drafting frame 7.
  • the claimed drafting kit 1B adapts to the production of different types of plain yarns which require the distance between middle and back drafting rollers 12, 13, to be modified depending on the kind of fibres used to manufacture those plain yarns.
  • drafting kits 1A, 1B drastically improve handling of components necessary for drafting roving either for the production of fancy yarn or plain yarn in a ring spinning machine.
  • the drafting kits 1A, 1B help reducing the time used to replace drafting aprons during maintenance operations.
  • roller apron support 2 is rotated to an upper position to facilitate changing the drafting aprons 10a, 10b, 18 while the existing bottom drafting rollers, 12, 13 keep running (see, figures 7 , 9 , 10 , 12 ).
  • either the drafting kit 1A or the drafting kit 1B is coupled to the drafting frame 7 at spinning positions S1, S2 and roving is fed to the drafting aprons 10a, 10b or 18.
  • Operation of the drafting aprons 10a, 10b, 18 is controlled by the middle and back existing bottom rollers 12, 13 acting on drafting aprons 10a, 10b, 18.
  • These drafting aprons 10a, 10b, 18 may be easily replaced in case of failure without the need for the existing bottom rollers 12, 13 to stop running.
  • the claimed system allows to monitor the breakage of either fancy yarn or plain yarn by means of roving stop devices 15 arranged below the drafting assembly, at each spinning position S1, S2.
  • Each roving stop device 15 includes means for stopping the movement of the first and second removable drafting rollers 4, 5 upon breakage of the yarn intended to be fed to the corresponding spindle assembly 26.
  • said means for stopping the movement of the first and second removable drafting rollers 4, 5 include;
  • the first and second detent elements 16, 17 are configured as a wedge arranged to be inserted, in its active position, between an existing middle or back bottom drafting roller 12, 13 and its corresponding first or second drafting roller 4, 5, to stop the supply of roving upon breakage of the yarn.
  • Both wedges are articulately attached to a slide 27 which is arranged to cooperate with a trigger (not shown) responsible for activating the displacement of said slide 27 upon breakage of the yarn.
  • the first and second detent elements 16, 17 rotate to its active position in which these detent elements 16, 17 become inserted between the existing middle and back bottom drafting rollers 12, 13 and its corresponding first and second removable drafting rollers 4, 5 of the corresponding drafting kit 1A, 1B.
  • Both detent elements 16, 17 are configured as a wedge to be inserted to raise the first or second removable drafting rollers 4, 5 so that said first and second removable drafting rollers 4, 5 can loss transmission of movement from the driver rollers to detent the supply of roving (the existing middle and back bottom drafting rollers 12, 13 operate as drive rollers).
  • the roving stop device 15 comprise means for detecting a signal coming from an optical sensor 28 arranged close to the spindle assembly 26 so as to detect movement of a traveller 29 and to output a signal of absence or change of movement of the traveller 29 upon breakage of a yarn.
  • the traveller 29 moves along a ring 30 arranged coaxially a spindle 31. From here the yarn is attached to the existing yarn on the spindle 31.
  • the traveller 29 and the spindle 31 share the same axis but rotate at different speeds. The spindle 31 is driven and the traveller 29 drags behind thus distributing the rotation between winding up on the spindle 31 and twist into the yarn.
  • the cited optical sensor 28 controls continuously the status and RPM of each spinning position, and the data collected from the optical sensor 28 is delivered to a monitoring software that sends an activating signal to the roving stop device 15.
  • the optical sensor 28 has the advantage that provides superfast detection and communication because it allows to detect the breakages of yarn in less than 1 second so as to activate the roving stop device 15 instantaneously.
  • Figures 13 to 16 show isometric and side views of the drafting assembly and roving stop device 15 of the claimed system at two adjacent spinning positions S1, S2, with passage of one roving at each spinning position for the production of either plain yarn or fancy yarn.
  • the detent elements 16, 17 of the roving stop device are shown in an active position in one of the spinning positions S1 so that a roving breakage is shown in the main drafting zone close to the drafting aprons of the drafting assembly.
  • the supply of roving is stopped and a roving break occurs on the main drafting zone close to the drafting aprons of the drafting assembly.
  • the roving ends "R" are found at an easy accessible and forward position whereby reengagement can be done very easy and with practically inexistent broken stretches of roving to be air suctioned on restarting operation. Therefore, energy consumption of spinning system may be much lower.
  • the claimed system Upon breakage of the yarn intended to be fed to the spinning assembly 26, the claimed system allows both adjacent roving ends "R" to be found in the main drafting zone close to the drafting aprons 10a, 10b of the first and second removable drafting rollers 4, 5 and the upper drafting aprons of the drafting rollers 32, 33 of the top arm (see, figure 16 ).
  • the claimed system has the advantage that middle and back bottom drafting aprons 10a, 10b can be wrapped around those first and second removable drafting rollers 4, 5 so that existing middle and back bottom drafting rollers 12, 13 keep clear of aprons for the two detent elements 16, 17 of the roving stop device 15 to act on the first and second removable drafting rollers 4, 5 to stop the supply of roving.
  • Figure 19 show a prior art spinning system for spinning fancy yarn wherein drafting aprons 10a' and 10b' are wrapped around the existing middle and back drafting rollers 12, 13 making it difficult for standard roving stop devices to act on the upper back drafting rollers to stop the supply of roving.
  • special roving stop devices must be used to stop the supply of roving at the entry of the drafting assembly whereby the roving break occurs at the entry of the drafting assembly.
  • long broken stretches of roving keep held fixed in between the back, middle and front drafting rollers 12, 13, 14 so that air suctioning devices 34 must be used to avoid these broken stretches to be bundled around the front bottom drafting roller 14 upon restarting operation.
  • Figure 20 show a prior art spinning system for spinning plain yarn wherein drafting aprons 18 are wrapped around the existing middle drafting rollers 13.
  • standard roving stop devices may be used to act on the upper back drafting rollers to stop the supply of roving.
  • the standard roving stop devices stop the supply in the pre-drafting zone whereby the roving break occurs between back and middle drafting rollers 12, 13.
  • broken stretches of roving keep held fixed in between the existing middle and front drafting rollers 13, 14 so that fibre air suctioning devices 34 must be used to avoid these broken stretches to be bundled around the front bottom drafting roller 14 upon restarting operation.
  • the claimed system may be used for spinning either plain yarn or fancy yarn without the ring spinning machine operating with air fibre suction devices 34.
  • the present invention provides drafting kits 1A, 1B which may be used to easily switch between producing plain yarn to fancy yarn, or vice-versa.
  • drafting aprons 10a, 10b, 18 may be easily replaced in case of failure by pivoting the drafting kits 1A, 1B onto the drafting frame 7 to access to the first and second removable drafting rollers 4, 5.
  • a further advantage of the claimed system is that operation of drafting aprons 10a, 10b, 18 on the first and second drafting rollers 4, 5 is carried out by applying a force torque to the existing bottom rollers 12, 13 lower than in the case of conventional drafting assemblies because these bottom rollers 12, 13 do not bear drafting aprons.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP19382096.6A 2018-11-02 2019-02-12 Spinnverfahren und verfahren zum spinnen von schlichtem garn und effektgarn mit dem besagten spinnsystem Withdrawn EP3696302A1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP19382096.6A EP3696302A1 (de) 2019-02-12 2019-02-12 Spinnverfahren und verfahren zum spinnen von schlichtem garn und effektgarn mit dem besagten spinnsystem
PCT/EP2019/080117 WO2020089486A1 (en) 2018-11-02 2019-11-04 Drafting assembly for a ring spinning machine and drafting kits for drafting fibres on a ring spinning machine
CN201980086132.1A CN113227475A (zh) 2018-11-02 2019-11-04 环锭纺纱机的牵引组件及在环锭纺纱机上牵引纤维的牵引套件
EP19795033.0A EP3874080A1 (de) 2018-11-02 2019-11-04 Streckanordnung für eine ringspinnmaschine und streckkits zum strecken von fasern auf einer ringspinnmaschine
PCT/EP2020/053429 WO2020165143A1 (en) 2019-02-12 2020-02-11 A spinning system and method of spinning plain yarn or fancy yarn with said spinning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19382096.6A EP3696302A1 (de) 2019-02-12 2019-02-12 Spinnverfahren und verfahren zum spinnen von schlichtem garn und effektgarn mit dem besagten spinnsystem

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EP3696302A1 true EP3696302A1 (de) 2020-08-19

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EP19382096.6A Withdrawn EP3696302A1 (de) 2018-11-02 2019-02-12 Spinnverfahren und verfahren zum spinnen von schlichtem garn und effektgarn mit dem besagten spinnsystem

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WO (1) WO2020165143A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4095295A1 (de) * 2021-05-28 2022-11-30 Pinter Caipo, S.A.U. Vorgarnstoppanordnung für ein streckwerk einer ringspinnmaschine sowie ringspinnmaschine mit der vorgarnstoppanordnung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR672351A (fr) * 1929-03-30 1929-12-27 Dispositif de commande pour cylindres rotatifs de petit diamètre, dans les machinesde préparation et de filature de coton, laine, etc.
FR806061A (fr) * 1936-04-28 1936-12-07 Mécanisme perfectionné d'étirage ou de rétention pour métiers de préparation et de filage et métiers en comportant application
US3341901A (en) * 1965-08-16 1967-09-19 Kitamura Shinzo Long apron type draft apparatus used in textile machines
US4501114A (en) 1981-06-13 1985-02-26 Skf Kugellagerfabriken Gmbh Apparatus for controlling passage of material through textile spinning or twisting machine
JPS6269832A (ja) * 1985-09-24 1987-03-31 Murata Mach Ltd 紡績機のドラフト装置
WO2014012189A1 (en) * 2012-07-19 2014-01-23 Uster Technologies Ag Photoelectric monitoring of a rotational yarn movement
WO2015033811A1 (ja) 2013-09-09 2015-03-12 株式会社 豊田自動織機 紡機におけるドラフト装置
EP3115488A1 (de) * 2015-07-08 2017-01-11 Kabushiki Kaisha Toyota Jidoshokki Faserbündelzuführstoppvorrichtung für spinnrahmen

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR672351A (fr) * 1929-03-30 1929-12-27 Dispositif de commande pour cylindres rotatifs de petit diamètre, dans les machinesde préparation et de filature de coton, laine, etc.
FR806061A (fr) * 1936-04-28 1936-12-07 Mécanisme perfectionné d'étirage ou de rétention pour métiers de préparation et de filage et métiers en comportant application
US3341901A (en) * 1965-08-16 1967-09-19 Kitamura Shinzo Long apron type draft apparatus used in textile machines
US4501114A (en) 1981-06-13 1985-02-26 Skf Kugellagerfabriken Gmbh Apparatus for controlling passage of material through textile spinning or twisting machine
JPS6269832A (ja) * 1985-09-24 1987-03-31 Murata Mach Ltd 紡績機のドラフト装置
WO2014012189A1 (en) * 2012-07-19 2014-01-23 Uster Technologies Ag Photoelectric monitoring of a rotational yarn movement
WO2015033811A1 (ja) 2013-09-09 2015-03-12 株式会社 豊田自動織機 紡機におけるドラフト装置
EP3045576A1 (de) * 2013-09-09 2016-07-20 Kabushiki Kaisha Toyota Jidoshokki Entwurfsvorrichtung in einer spinnmaschine
EP3115488A1 (de) * 2015-07-08 2017-01-11 Kabushiki Kaisha Toyota Jidoshokki Faserbündelzuführstoppvorrichtung für spinnrahmen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4095295A1 (de) * 2021-05-28 2022-11-30 Pinter Caipo, S.A.U. Vorgarnstoppanordnung für ein streckwerk einer ringspinnmaschine sowie ringspinnmaschine mit der vorgarnstoppanordnung

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