EP2623650A1 - Dispositif d'alimentation de fil et frein de fil - Google Patents

Dispositif d'alimentation de fil et frein de fil Download PDF

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Publication number
EP2623650A1
EP2623650A1 EP13000411.2A EP13000411A EP2623650A1 EP 2623650 A1 EP2623650 A1 EP 2623650A1 EP 13000411 A EP13000411 A EP 13000411A EP 2623650 A1 EP2623650 A1 EP 2623650A1
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EP
European Patent Office
Prior art keywords
frusto
yarn
cone body
counter
intermediary portion
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.)
Granted
Application number
EP13000411.2A
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German (de)
English (en)
Other versions
EP2623650B1 (fr
Inventor
Thomas Bergman
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.)
Iro AB
Original Assignee
Iro AB
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Filing date
Publication date
Application filed by Iro AB filed Critical Iro AB
Publication of EP2623650A1 publication Critical patent/EP2623650A1/fr
Application granted granted Critical
Publication of EP2623650B1 publication Critical patent/EP2623650B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/364—Yarn braking means acting on the drum
    • D03D47/366—Conical
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • D04B15/482—Thread-feeding devices comprising a rotatable or stationary intermediate storage drum from which the thread is axially and intermittently pulled off; Devices which can be switched between positive feed and intermittent feed
    • D04B15/484—Yarn braking means acting on the drum

Definitions

  • the invention relates to a yarn feeder defined in the preamble part of claim 1 and to a yarn brake defined in the preamble part of claim 9.
  • the frusto-cone body of the known yarn brake consists of a high-performance thermoplastic polymer such as polyketone.
  • the known yarn brake is a structural unit and may be incorporated into a yarn feeder.
  • the known yarn brake has since its introduction in the textile field proven excellent performance, e.g. in view of wear resistance and good yarn tensioning properties.
  • experiences in the textile field recently indicated that for specific types of yarns, namely coarser and/or stiffer yarns, like coarse cotton yarns, chenille or similar difficult or delicate yarns, a further improvement of the yarn brake would yet be desirable in order to achieve an optimum performance of the yarn brake.
  • the braking performance of such yarn brakes may namely be somewhat deteriorated in processing the above-mentioned delicate yarns by unavoidable resonance oscillations, also called “natural or self-oscillations" of the frusto-cone body.
  • unavoidable resonance oscillations also called "natural or self-oscillations" of the frusto-cone body.
  • Such oscillations occur when the yarn withdrawn from the storage body of the feeder through the braking nip and while orbiting generates a crescent-shaped, circumferentially wandering, transient deformation (wandering wave) of the wall of the radially deformable frusto-cone body.
  • These oscillations tend to increase and reach a resonance state and then cyclically and rapidly deform the entire frusto-cone body in relation to the withdrawal rim, e.g. when the local deformation orbits with high frequency.
  • the entire braking zone could be lifted from the withdrawal rim by these resonance oscillations
  • the yarn feeder or the yarn brake in the yarn feeder should generate a desirably substantially identical and reproducible yarn tension profile from one machine cycle to the next, and on a continual basis.
  • the yarn feeder or yarn brake should generate a stable, constant yarn tension continually over time.
  • Part of the object is to reduce undesirable oscillations of the frusto-cone body during operation of the yarn feeder, or ideally to extinguish or suppress oscillations completely and, at the same time, to maintain the excellent braking performance, i.e. provide a substantially self-oscillation safe yarn brake.
  • the oscillation damper carried by the frusto-cone body of the yarn brake considerably reduces or even extinguishes oscillations of the frusto-cone body caused by the orbiting local deformation of the wall of the frusto-cone body during operation of the yarn feeder and widely suppresses a resonance state in particular even when processing delicate yarns with high yarn withdrawal speeds.
  • the oscillation damper comprises a generally annular counter-mass body and a circumferentially continuous intermediary portion of elastic material connecting the counter-mass body and the frusto-cone body. In the feeder the oscillation damper is arranged outside the braking nip so that it does not obstruct appropriate braking of the yarn in the yarn brake.
  • Oscillation energy transmitted from the frusto-cone body and its orbiting local deformation into the intermediary portion will be consumed or dissipated by at least deformation of the elastic material of the intermediary portion which in turn is backed up by the counter-mass body which either does not oscillate or even carries out oscillations different from the oscillations of the frusto-cone body such that the elastic material in the intermediary portion is forced to permanently work and dissipate or consume energy.
  • This effect suppresses the occurrence of a resonancy state in the frusto-cone body the braking zone of which thus remains in contact with the withdrawal rim except at the location where the yarn passes the braking nip.
  • the braking zone will not be partly or totally released from the withdrawal rim, the excellent yarn braking performance of the yarn brake will be maintained even when processing delicate yarns with high yarn withdrawal speeds.
  • the counter-mass body perfectly backs up the intermediary portion which in turn has to work by its elasticity and damping property and thus suppresses or extinguishes the oscillations of the frusto-cone body or hinders a development of a tendency of the frusto-cone body to reach a resonance state.
  • Fig. 1 shows a yarn feeder F with a stationary housing 1 containing a drive motor DM for driving a central shaft 2 to rotate inside the housing 1.
  • An upstream, rear part of the shaft 2 is hollow and communicates with an obliquely outwardly extending yarn winding-on tube 3 fixed to a middle portion of the shaft 2, which winding-on tube 3 rotates together with the shaft 2.
  • On a front part of the shaft 2 a storage body 4 is rotatably supported.
  • the storage body 4 is prevented from co-rotating with the shaft 2 when the shaft 2 is driven be e.g. co-acting permanent magnets HM respectively arranged in the storage body 4 and in the stationary housing 1.
  • the storage body 4 defines a substantially cylindrical storage surface 4a and has an axis X.
  • the storage surface 4a serves to carry a schematically shown temporary yarn store YS formed of several, consecutively wound-on windings of a yarn Y.
  • the yarn Y is pulled off e.g. from a not shown yarn bobbin arranged upstream of the yarn feeder F, passes through the rotating hollow shaft 2 and the winding-on tube 3, exits an outlet opening 3a of the winding-on tube 3, and is put on and wound up in the yarn store YS on the storage surface 4a.
  • the yarn Y is consumed by a not shown textile machine (e.g. a projectile weaving machine, a rapier weaving machine, a knitting machine, etc.) by being withdrawn from the yarn store YS overhead of the withdrawal rim 4b (which, preferably is bevelled or rounded) and through a stationarily fixed yarn output eyelet 5 located coaxially with the axis X of the storage surface 4a and stationarily supported in a bracket 1 a extending from the stationary housing 1 alongside the storage surface 4a, and further into the textile machine.
  • a not shown textile machine e.g. a projectile weaving machine, a rapier weaving machine, a knitting machine, etc.
  • the yarn feeder F is equipped with a yarn brake B details of which will be explained in the following.
  • the yarn brake shown and explained is a non-restricting embodiment. Instead other not shown yarn brake designs could be used, provided that those have a frusto-cone body 9 which is deformable in radial direction and is axially yieldably pressed against the withdrawal rim 4b of the storage body 4.
  • a basket-shaped structure 6 having an outer ring portion 6a three spoke portions 6b1, 6b2, 6b3 and an inner ring portion 6c is snapped with its outer ring portion 6a into a holder 7.
  • the holder 7, preferably, is adjustable in axial direction along the bracket 1 a. These adjustments vary the axial distance between the holder 7 and the withdrawal rim 4b of the storage body 4, e.g. for setting a desired basic yarn tension for the yarn Y when withdrawn from the storage surface 4a and through the yarn brake B.
  • the basket-shaped structure 9b, 6 encloses and co-acts with a ring-shaped body 8 carrying a small diameter end 10, 9b of a frusto-cone body 9 defining the so-called braking body of the yarn brake B.
  • the frusto-cone 9 has a large diameter end 11 at the upstream side (seen in yarn withdrawal direction).
  • the basket-shaped structure 6 being supported by holder 7 resiliently (elastically) forces an inner surface 12 of the frusto-cone body 9 coaxial with the axis X of the storage body 4 into pressing contact with the withdrawal rim 4b.
  • the inner surface 12 of the frusto-cone body 9 defines a circumferentially continuous braking zone BZ between the large and small diameter ends 9a, 11.
  • the frusto-cone body 9 is positioned coaxial with the axis X and is pressed by the ring-shaped body 8 resiliently against the withdrawal rim 4b.
  • the braking zone BZ and the withdrawal rim 4b commonly and define a braking nip N for the yarn Y.
  • the axially resilient force on the frusto-cone body 9 is generated in way known per se, disclosed e.g. in EP 1 807 563 A1 , namely by a system of two co-actuating mutually repelling ring-shaped permanent magnets PM1, PM2 fixed in annual seats in the ring-shaped body 8 and the inner ring portion 6c of the basket-shaped structure 6.
  • the repelling force generated between the basket-shaped structure 6 and the ring body 8 is kept under guidance controlled by three guiding pins 8a, 8b, 8c, one ends of which are fixed at an outer rim of the ring-shaped body 8, while the other ends of the guiding pins are slidable in axial guiding holes 8A, 8B, 8C provided in the inner ring portion 6c of the basket-shaped structure 6.
  • the small diameter end 10, 9b of the frusto-cone body 9 e.g. may be connected at 10 to the ring-shaped body 8 of a snap-in connection.
  • steel having a smooth surface, may be attached to the inner periphery of the ring-shaped body 8 and serves to deflect the withdrawn yarn Y exiting the braking nip N essentially in the direction of a theoretical prolongation of the axis X.
  • Such yarn brakes having a frusto-cone body as well may be implemented in a yarn feeder and may be designed according to the invention.
  • the axially resilient force on the frusto-cone body may be achieved by other means, for example by tensioning springs as e.g. disclosed in EP 0 884 263 B1 , or by an elastic diaphragm.
  • the circumferentially continuous braking zone BZ mechanically co-acting with the withdrawal rim 4b is defined on the inner surface 12 of the frusto-cone body 9.
  • the braking zone BZ is kept in resiliently forced contact with the withdrawal rim 4b constituting the braking nip N through which the yarn Y is withdrawn.
  • the frusto-cone body 9 has a straight generatrix and e.g. a cone angle of about 30° (cone tip angle of about 120°). The generatrix does not need to be straight. The cone angle may be selected differently as well.
  • the frusto-cone body 9 may consist of a high performance thermoplastic polymer such as a polyketone composition, selected from the following polyketone group: polyetheretherketone (PEEK), polyaryletherketone (PAEK), polyetherketoneketone (PEKK).
  • a polyketone composition selected from the following polyketone group: polyetheretherketone (PEEK), polyaryletherketone (PAEK), polyetherketoneketone (PEKK).
  • frusto-cone body 9 for example a polyester, or a composite material, e.g. carbon fibre reinforced plastics, etc. Many other examples of suitable materials are disclosed in the prior art of this technical field.
  • the polyketone frusto-cone body 9 mentioned above may have a wall thickness ranging between about 0.15 mm and 0.5 mm.
  • the frusto-cone body 9 of the yarn brake B carries an essentially annular oscillation damper 14 provided to suppress or reduce oscillations of the frusto-cone body 9, and, in particular, to suppress that the frusto-cone body 9 reaches a resonance state during operation of the yarn feeder F.
  • the large diameter end 11 of the frusto-cone body 9 is associated or connected with a circumferentially continuous either unitary or multi-piece and generally frustoconical ring collar 14ab.
  • the ring collar 14ab is made of an elastic material, preferably an elastomer and contains a substantially annular counter-mass body 14a and a circumferentially continuous intermediary portion 14b.
  • Elastomers as polyurethane have proven to be excellent.
  • Other kinds of elastic material for example silicone rubber may be used as well.
  • polyurethane may be used with a wall thickness of the ring collar 14ab of about 1 mm.
  • the frusto-cone body 9 has a length of about 4 cm in its generatrix direction and a weight of about 8 grams.
  • the ring collar 14ab has a length of about 1.5 cm in generatrix direction and a total weight, including a lip 14e by which the ring collar 14ab overlaps (reference number BO, explained later) the frustocone body 9 of about 16 grams.
  • the weight of a free portion of the ring collar 14ab extending generally outwardly from the large diameter end 11 of the frusto-cone body 9 is in this case estimated to be about 10 grams.
  • the ring collar 14ab acts as a counter-mass oscillation damper in relation to the frusto-cone body 9 by virtue of inherent elasticity at least of the intermediary portion 14b and by an elastic connection e.g. with the large diameter end 11 of the frusto-cone body 9.
  • the yarn feeder F In operation of the yarn feeder F, when the yarn Y is withdrawn through the braking nip N and into the textile machine (not shown) the location where the yarn Y passes the braking nip N is rotating around the withdrawal rim 4b. Consequently, the wall of the frusto-cone body 9 is locally deformed at this location, such that a wandering wave of deformation occurs in the frusto-cone body 9. The rotating wave causes oscillations in the frusto-cone body 9.
  • the oscillation damper 14 reduces or extinguishes these oscillations of the frusto-cone body 9 and advantageously suppresses that the oscillations reach a resonance state.
  • the counter-mass 14a backs up the intermediary portion 14b which by deformation dissipates oscillation energy and may even impart inwardly directed damping forces at least on the frusto-cone body 9.
  • the elastic material in the intermediary position 14b may be selected to have good oscillation damping properties.
  • the ring collar 14ab is a single or unitary component of elastic material, and comprises the counter-mass body 14a and the intermediary portion 14b, here both of elastic material.
  • the intermediary portion 14b elastically attaches the counter-mass body 14a to the frusto-cone body 9.
  • Elasticity and damping properties in the oscillation damper 14 thus in this case existing (inherent) in the whole unitary ring collar 14ab, will consume or dissipate or absorb oscillations or the energy of the undesirable self-oscillations arising in the frusto-cone body 9 and in the entire system.
  • the counter-mass body 14a is a circumferentially continuous ring e.g. with square cross-section.
  • the ring may be of the same elastic material as the intermediary portion 14b. Instead it could be made of an inelastic material or of an at least less elastic material than the elastic material of the intermediary portion 14b, for example, of a PC (polycarbonate) plastics, or it could even be of metal, preferably of light metal, e.g. aluminium.
  • the intermediary portion 14b is still and has to be of elastic or highly elastic material, for example elastomer. Its thickness may decrease with increasing distance from the frusto-cone body 9.
  • the counter-mass body 14a and the intermediary portion 14b may be separate components which are connected with each other in an appropriate way (multi-piece structure) for example by means of a durable glue.
  • both parts are e.g. moulded plastic parts, they could even be joined in an injection moulding process.
  • the oscillation damper 14 working as a counter-mass damper, the ring collar 14ab through its elastic connection with the frusto-cone body 9, suppresses undesirable self-oscillations of the frusto-cone body 9 that might otherwise negatively influence the braking effect on the yarn Y, e.g. making the resulting yarn tension in the withdrawn yarn Y unstable.
  • the kinetic energy of the undesirable self-oscillations of the frusto-cone body 9 will be extensively, or in an ideally tuned case, completely dissipated which leads to an expedient stabilisation of the yarn tension generated by the yarn brake B in the withdrawn yarn Y.
  • the inner surface of the oscillation damper 14, e.g. of the ring collar 14ab may have a preferably small, circumferentially continuous lip 14c, bounding an annular pocket seat 14d at the intermediary portion 14b within which pocket seat 14d the large diameter end 11 of the frusto-cone body 9 is fitted such that the ring collar 14ab is loosely kept on the frusto-cone body 9 and is easily removable.
  • This type of gentle connection is especially suitable also because it does not negatively influence the expedient dynamic properties and the desired braking performance of the radially deformable but axially relatively stiff frusto-cone body 9.
  • the ring collar 14ab may be attached to the frusto-cone body 9 differently, e.g. by a durable glue, a double-adhesive tape, or even by vulcanisation, provided that the ring collar is made of a material being or including rubber.
  • the ring collar 14ab overlaps, in generatrix direction, with another, preferably circumferentially continuous, lip 14e the outer surface 13 on a comparatively large (frustoconical) portion BO close to the large diameter end 11 of the frusto-cone body 9.
  • the lip 14e extends on the outer surface of the frusto-cone body 9 up to or even somewhat beyond (downstream in the yarn withdrawal direction) the region of the braking zone BZ, with which the inner surface 12 of the frusto-cone body 9 is may come in resiliently forced contact with the rounded withdrawal rim 14b, when the yarn brake B is installed in a yarn feeder F.
  • the lip 14e may be dispensed with in other not shown embodiments..
  • the backing up of a relatively large portion of the outer surface 13 of the frusto-cone body 9 by the overlapping lip 14e has proven to contribute positively to the desired stabilisation of the dynamic behaviour of the frusto-cone body 9 in operation of the yarn brake B.
  • the stabilising effect of the ring collar 14ab may be further improved if ( Figs 4 to 6 ) the ring collar 14ab is designed with a circumferential continuous ring flange 15 at its free end, having one or a series of portions extending in different directions all of them differing from the straight generatrix direction of the frusto-cone body 9 and also of the main portion of the ring collar 14ab.
  • This ring flange 15 has proven to have an expedient positive stiffening effect on the ring collar 14ab and form part of the counter-mass body 14 integrated into the ring collar 14ab..
  • the ring flange 15 may be substantially radial with a radial extension in the range of some millimetres, e.g. about 5 mm.
  • the ring flange 15 (or a part thereof) can have a direction which is so to speak inverse to the generatrix direction of the main part of the ring collar 14ab, and with a rounded transition region 15a between the main portion of the ring collar 14ab and the ring flange 15.
  • the ring flange 15 has an S-shaped profile or cross-section.
  • the ring collar 14ab comprises a larger amount of mass than in the earlier shown embodiment, by having the ring flange 15, enlarged and essentially circular in cross-section, at its free end, at least as part of the counter-mass body 14a.
  • Figs 10 and 11 show embodiments where the ring collar 14ab of the oscillation damper 14 has a U-shaped, respectively a Z-shaped profile or cross-section with free portions of the ring collar 14ab extending frontwards alongside and essentially in parallel with the outer surface 13 of the frusto-cone body 9.
  • the oscillation damper 14 is carried by the outer surface 13 of the frusto-cone body 9 in a region between the large and small diameter ends 11, 9b, e.g. in the vicinity of the region of the braking zone BZ .
  • the ring collar 14ab including the counter-mass body 14a and the intermediary position 14b has the form of a circumferentially continuous dual-leg tongue or lip of elastic material, e.g. an elastomer joined to the outer surface 13 of the frusto-cone body 9, for example by a durable glue.
  • the oscillation damper 14 is located in an area even somewhat downstream (seen in yarn withdrawal direction) of the region of the braking BZ with which the inner surface 12 of the frusto-cone body 9 may be brought in resiliently forced contact with the withdrawal rim 4b, when installed in a yarn feeder F.
  • Fig. 12 has the oscillation damper 14 substantially at the same location of the outer surface 13 of the frusto-cone body 9 as shown in Fig. 13 , i.e. downstream of the area of the braking zone BZ.
  • a circumferential continuous counter-mass body 14a with the shape of a ring e.g. having a square cross-section e.g. of inelastic material, e.g. polycarbonate plastics, metal or light metal, and the intermediary portion 14b of elastic material, e.g.
  • an elastomer constitute the oscillation damper 14, in which a part (lip 14e) of the intermediary portion 14b is attached to the outer surface 13 of the frusto-cone body 9, for example by a durable glue.
  • the counter-mass body 14a may be connected to the intermediary portion 14b by gluing or by co-injection moulding.
  • the frusto-cone body 9 and the oscillation damper 14 may be a prefabricated separate structure unit or may be assembled when, before or after the frusto-cone body 9 is mounted in the ring-shaped body 8. In the case that the frusto-cone body 9 has to be replaced, the oscillation damper 14 may be used again, e.g. of the embodiments of Figs 1 to 11 .
  • the respective yarn brake B as well may be a prefabricated separate structural unit (spare part for yarn feeders F).

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP20130000411 2012-02-02 2013-01-28 Frein de fil pour dispositif d'alimentation de fil Active EP2623650B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1200068 2012-02-02

Publications (2)

Publication Number Publication Date
EP2623650A1 true EP2623650A1 (fr) 2013-08-07
EP2623650B1 EP2623650B1 (fr) 2015-03-11

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EP20130000411 Active EP2623650B1 (fr) 2012-02-02 2013-01-28 Frein de fil pour dispositif d'alimentation de fil

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EP (1) EP2623650B1 (fr)
CN (1) CN103243460B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112978500A (zh) * 2019-12-13 2021-06-18 爱吉尔电子股份公司 用于贮纱式纱线进给器的纬纱制动装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0534263A1 (fr) * 1991-09-20 1993-03-31 L.G.L. ELECTRONICS S.p.A. Frein de fil à ajustage automatique pour un fournisseur de trame
EP1059375A1 (fr) * 1999-06-01 2000-12-13 L.G.L. Electronics S.p.A. Frein de fil pour fournisseur de trame avec des temps d'intervention réduits
EP0884263B1 (fr) 1997-06-11 2002-04-03 L.G.L. Electronics S.p.A. Frein de fil modulé à ajustage automatique pour un fournisseur de trame
EP1807563A1 (fr) 2004-11-05 2007-07-18 Iro Ab Dispositif tendeur de fil
EP2213776A1 (fr) 2009-02-03 2010-08-04 Iro Ab Corps de freinage et passe-fil

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1295624B1 (it) * 1997-10-15 1999-05-24 Roj Electrotex Nuova Srl Dispositivo di frenatura per filati in alimentatori di trama ed elemento frenante per detto dispositivo
SE0103196D0 (sv) * 2001-09-24 2001-09-24 Iropa Ag Fadenliefergerät
ITTO20050063U1 (it) * 2005-05-18 2006-11-19 L G L Elecrtronics S P A Perfezionamento ad un dispositivo di frenatura del filato in alimentatori di trama per macchine tessili
DE602007007101D1 (de) * 2007-11-30 2010-07-22 Memminger Iro Gmbh Fadenzuführungsvorrichtung und Fadenbremse

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0534263A1 (fr) * 1991-09-20 1993-03-31 L.G.L. ELECTRONICS S.p.A. Frein de fil à ajustage automatique pour un fournisseur de trame
EP0884263B1 (fr) 1997-06-11 2002-04-03 L.G.L. Electronics S.p.A. Frein de fil modulé à ajustage automatique pour un fournisseur de trame
EP1059375A1 (fr) * 1999-06-01 2000-12-13 L.G.L. Electronics S.p.A. Frein de fil pour fournisseur de trame avec des temps d'intervention réduits
EP1807563A1 (fr) 2004-11-05 2007-07-18 Iro Ab Dispositif tendeur de fil
EP2213776A1 (fr) 2009-02-03 2010-08-04 Iro Ab Corps de freinage et passe-fil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112978500A (zh) * 2019-12-13 2021-06-18 爱吉尔电子股份公司 用于贮纱式纱线进给器的纬纱制动装置

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CN103243460A (zh) 2013-08-14
CN103243460B (zh) 2015-04-01
EP2623650B1 (fr) 2015-03-11

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