EP0498758A1 - Frein de fil avec une lame de freinage commandée par électromagnétique - Google Patents

Frein de fil avec une lame de freinage commandée par électromagnétique Download PDF

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Publication number
EP0498758A1
EP0498758A1 EP92810013A EP92810013A EP0498758A1 EP 0498758 A1 EP0498758 A1 EP 0498758A1 EP 92810013 A EP92810013 A EP 92810013A EP 92810013 A EP92810013 A EP 92810013A EP 0498758 A1 EP0498758 A1 EP 0498758A1
Authority
EP
European Patent Office
Prior art keywords
brake
thread
segments
electromagnets
thread brake
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
EP92810013A
Other languages
German (de)
English (en)
Other versions
EP0498758B1 (fr
Inventor
Lorant Gacsay
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.)
Itema Switzerland Ltd
Original Assignee
Sulzer AG
Sultex AG
Gebrueder Sulzer AG
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 Sulzer AG, Sultex AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of EP0498758A1 publication Critical patent/EP0498758A1/fr
Application granted granted Critical
Publication of EP0498758B1 publication Critical patent/EP0498758B1/fr
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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/22—Co-operating surfaces mounted for relative movement and arranged to apply pressure to material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/53—Auxiliary process performed during handling process for acting on performance of handling machine
    • B65H2301/531—Cleaning parts of handling machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2555/00—Actuating means
    • B65H2555/10—Actuating means linear
    • B65H2555/13—Actuating means linear magnetic, e.g. induction motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a thread brake according to the preamble of claim 1 and looms with such thread brakes.
  • the brake plate consists of a thin, ferromagnetic metal band. It has a low mass and therefore advantageously reacts quickly to short switching times of the electromagnets. Since the brake disk is thin, several - experience has shown that at least five - electromagnets are required, which are arranged in a row in the thread running direction below the rigid braking surface. This has the further advantage that braking takes place at several points with relatively low surface pressures and is therefore gentle on the thread.
  • this thread brake is structurally relatively long compared to other known brakes, in which the thread is pinched at only one or maybe two points, and thus takes up a lot of space.
  • a different arrangement of the magnets for example a double-row arrangement, makes it possible to shorten the length of the thread brake - but at the cost of an increased width.
  • the known thread brake with an electromagnetically actuated brake disc has a further disadvantage: the flight released by the thread accumulates on the braking surfaces, in particular on the longitudinal edges of the brake disc.
  • the adhesive fibers obviously increase the brake gap.
  • the braking force decreases rapidly with increasing gap width, the braking effect is severely impaired by the flight deposits. It is therefore necessary to ensure that the interfering fibers are removed continuously or intermittently. This requirement means that the brake can be released to such an extent that the fibers can be easily removed from the brake gap, for example by blowing or vacuuming.
  • some of the electromagnets are designed as airing coils for the purpose of ventilation.
  • Plate-shaped permanent magnets are attached to the brake disk - opposite the air coils and on the side facing away from the thread.
  • the brake magnets When the brake magnets are switched off, it is possible to lift the brake plate completely, i.e. to release the thread brake, if the air coils are correctly polarized.
  • the additional use of air spools has the disadvantage that the thread brake takes up even more space.
  • the brake disk sticks to the lower brake body due to remanent magnetization (residual magnetism) and, in the case of weft insertion devices, causes harmful tension forces in the weft thread at the beginning of each weft insertion.
  • the deficiency can also be remedied here with the option of opening the brake gap using air coils.
  • With thick threads there is the problem that the brake gap is relative wide and therefore the magnetic braking forces are relatively weak. This can be remedied by providing a force boost, namely by using several, superimposed, disks made of ferromagnetic material instead of just one brake disk.
  • the object of the invention is to provide simple means for the thread brake mentioned at the outset, with which there is a force amplification for the braking and ventilating electromagnets, improvements being made with regard to the disadvantages mentioned and in particular ensuring that the flexibility of the brake disk is ensured remains as unaffected as possible. This object is achieved by means of the features of the characterizing part of claim 1.
  • metal plates made of soft ferromagnetic material are arranged between the brake plate and the brake cover in order to increase the braking force and the force during release.
  • These metal plates form a segmented layer.
  • the individual segments which have an arrangement corresponding to the areas of action of the electromagnets, are connected to one another, although these connections must be flexible, so that the flexibility of the segmented layer corresponds to that of the brake disk.
  • the segments can also be connected to the brake plate, but the contact areas through which the connections are made should be as small as possible so that the flexibility of the brake plate remains as unimpaired as possible. At least individual segments must be connected to the brake plate so that the brake plate is forced to lift off the lower braking surface when released by means of electromagnets in the brake cover.
  • FIGS. 1 a to 2 b the state of the art is discussed in more detail in order to explain what is already known or obvious to the person skilled in the art with regard to the strengthening of the brake or release magnets.
  • the following components of the thread brake 1 can be seen in FIG. 1a: the brake body 10 and the brake cover 20 with the brake disc 2 in between, which together with the lower braking surface 11 can clamp the thread 3 (shown as a yarn consisting of fibers).
  • Platelet-shaped permanent magnets 4 are attached to the brake disk 2, with the aid of which the brake can be released.
  • the electromagnets 12 with the coil 12a, the core 12b and the yoke 12c are placed on a carrier 13, via which the electrical connections are made.
  • the electromagnets 12 with the carrier 13 are cast with a synthetic resin 14 in the brake body 10.
  • the brake cover 20 is connected to the brake body 10 via pivotable handlebars 21.
  • a brake plate 2 With thick yarn 3 ', as shown in Fig.1b, a brake plate 2 (with a thickness advantageous in terms of flexibility of 0.05 mm) is not sufficient.
  • Two additional fins 2 ′ and 2 ′′ are provided there for the purpose of strengthening, the choice of two fins being understood of course only as an example.
  • the oblique image of the known thread brake 1 in FIG. 2a shows the two links 21a and 21b, which can be pivoted in parallelogram fashion, by means of which the distance between the brake body 10 and the brake cover 20 can be changed and adjusted.
  • the handlebar 21a With the tension spring 22, the handlebar 21a is pulled against the brake body 10, where it abuts the adjustable stop 23.
  • the thread 3 is guided through the thread brake 1 by means of the eye 27a on the input side and the eye 27b on the output side.
  • the brake plate 2 is only hooked onto a holder 25 (see also FIG. 2b) on pins 26 on the input side.
  • the electromagnets are activated via the electrical connecting line 19.
  • FIG. 3 shows a side view of a thread brake 1 which has emerged as a further development from that of FIG. 2a.
  • the links 21a and 21b are arcuate in order to prevent an accumulation of flight between the brake gap and the links, which can be observed in the known thread brake with the straight links.
  • the pivoting movement is with arrow A for the Handlebar 21b indicated.
  • a tension spring 22 and a stop 23 (for example an eccentric screw) are in turn assigned to the link 21a.
  • the eyelets 27a and 27b are attached to the ends of the brake cover 20.
  • the braking electromagnets 12 are arranged in a row in the brake body 10 shown partially cut away.
  • the electromagnets 12 form a group comprising five magnets, each of which is flanked by a gap at the two ends separated by a further magnet.
  • the gaps are two ventilating electromagnets 12 'in the brake cover.
  • the gaps can be chosen narrower than the electromagnets 12.
  • the thread brake 1 advantageously turns out to be somewhat shorter than if the venting electromagnets 12 'were also arranged in the brake body 10 when using permanent magnets.
  • another arrangement can also be selected for the electromagnets 12, by means of which a shorter length of the thread brake 1 is made possible.
  • Another arrangement can also be advantageous for a better application of force to the brake disk 2.
  • FIG. 4 a shows a first exemplary embodiment of a brake disk 2 with a segmented layer 5 according to the invention.
  • the segments 56 which are assigned to the ventilating electromagnet 12 ', have a fastening 560 - consisting, for example, of a conical hole and an adhesive (see FIG. 4b) - through which the segment 56 is connected to the brake disk 2.
  • This connection 560 is limited to a small contact area, as a result of which - as required - the flexibility of the brake disk 2 is only minimally impeded (cf. FIG. 4b, where the brake disk 2 attracted by the electromagnet is indicated by dash-dotted lines).
  • the remaining part of the segmented layer 5 consists of a thick lamella with openings and slits. Recesses 52 are provided for the segments 56.
  • the segments 55 which are delimited by the slots 53a and 53b and the cutouts 52, are connected to one another by webs 60 which are narrow and thus allow the force-increasing layer 5 to be flexible.
  • the two openings 51 enable a joint in the thread brake with the brake disk 2.
  • FIG. 5 shows a detail from a layer 5 according to the invention, which has a fine segmentation.
  • the individual segments 55 are each assigned to one half of an electromagnet 12.
  • Such segments 55 can also take the place of segments 56 (FIG. 4 a).
  • at least some of the segments 55 must be connected to the brake plate, for example by spot welds or by connections like those shown by the attachment 560 in FIG. 4b.
  • the segments 55 form a coherent association. Therefore, the segments attached to the brake plate need not necessarily be those associated with the ventilating electromagnets.
  • the segmented layer 5 can be produced, for example, by an etching process.
  • an etching mask is produced on both sides on a metal strip by means of a light-sensitive lacquer and by exposure to the desired pattern.
  • the metal strip can then be etched through in an acid bath at the exposed locations of the lacquer layer, which correspond to the openings 54 in the segmented layer 5 (see FIG. 5).
  • This process gives you a great deal of design freedom.
  • FIG. shows the segment connections 60 have been made thinner by one-sided etching (see FIG. 6b: section along the line BB in FIG. 6a).
  • the connections between the segments 55 can also be formed in a snake shape (not shown) in order to obtain better flexibility of the force-enhancing layer 5.
  • the least problems with the attachment of layer 5 in the brake are encountered when the segments form a coherent association. You should therefore pay attention to this when designing the segmentation.
  • FIG. 7 a shows a thread brake 1 according to the invention, in which additional parts are shown compared to FIG. 3: a connecting line 19 for the braking electromagnets, a connecting line 29 for the releasing electromagnets, a brake carrier pin 15 and a blower device 28 Blower device 28 with a connection line 28a for compressed air (arrow C) and a distribution pipe 28b serves to remove the flight from the brake gap.
  • the distribution pipe 28b has nozzles 29 distributed over the length of the brake gap (see FIG. 7b, where the arrow C 'means the air jet emerging from the nozzle 29).
  • the blowing device 28 can also be formed as an integral part of the brake cover 20 or the brake body 10.
  • the brake carrier pin 15 indicates that the brake body 10 is provided as the lower part of the thread brake 1. However, this is not necessary: the brake could, for example, also be rotated by 180 ° or 90 ° with respect to the thread running direction.
  • the brake disk 2 consists of ferromagnetic material.
  • the layer 5 according to the invention it is also possible to choose a material for the brake disk 2 that is not ferromagnetic. In this case, layer 5 only needs to be designed to be correspondingly stronger.
  • the thread brake according to the invention is particularly suitable for defenseless weaving machines as a weft brake between the thread supply and the weft insertion device.
  • a blowing device 28 for the continuous removal of the resulting flight is particularly advantageous.
  • the thread brake according to the invention can also be used with advantage in machines for yarn processing with intermittent yarn feed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Braking Arrangements (AREA)
EP92810013A 1991-02-06 1992-01-08 Frein de fil avec une lame de freinage commandée par électromagnétique Expired - Lifetime EP0498758B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH368/91 1991-02-06
CH368/91A CH682926A5 (de) 1991-02-06 1991-02-06 Fadenbremse mit elektromagnetisch betätigter Bremslamelle.

Publications (2)

Publication Number Publication Date
EP0498758A1 true EP0498758A1 (fr) 1992-08-12
EP0498758B1 EP0498758B1 (fr) 1996-05-01

Family

ID=4185437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92810013A Expired - Lifetime EP0498758B1 (fr) 1991-02-06 1992-01-08 Frein de fil avec une lame de freinage commandée par électromagnétique

Country Status (7)

Country Link
US (1) US5244164A (fr)
EP (1) EP0498758B1 (fr)
JP (1) JPH04333643A (fr)
CN (1) CN1063911A (fr)
CH (1) CH682926A5 (fr)
DE (1) DE59206144D1 (fr)
RU (1) RU2037579C1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2710659A1 (fr) * 1993-09-29 1995-04-07 Nuovo Pignone Spa Frein de fil de trame amélioré pour métier à tisser sans navette.
CN1035337C (zh) * 1994-09-29 1997-07-02 尤沃彼基奥尼工业机械股份公司 无梭织机的新型纬纱制动器
WO1997049850A1 (fr) * 1996-06-26 1997-12-31 Picanol N.V. Tendeur pour fils de trame
WO2003033385A1 (fr) * 2001-10-12 2003-04-24 Iropa Ag Tendeur de fil

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1260645B (it) * 1993-04-08 1996-04-22 Lgl Electronics Spa Dispositivo di frenatura modulata del filato per apparecchi alimentatori di trama
DE19919122A1 (de) * 1999-04-27 2000-11-02 Iro Patent Ag Baar Aktuator und Fadenbremse mit einem Aktuator
EP1811068B1 (fr) * 2006-01-24 2009-06-17 Sultex AG Frein de trame avec commande
US8960596B2 (en) 2007-08-20 2015-02-24 Kevin Kremeyer Energy-deposition systems, equipment and method for modifying and controlling shock waves and supersonic flow
CN102018501A (zh) * 2009-09-21 2011-04-20 上海道生医疗科技有限公司 脉诊仪
US10669653B2 (en) * 2015-06-18 2020-06-02 Kevin Kremeyer Directed energy deposition to facilitate high speed applications

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4112561A (en) * 1977-02-24 1978-09-12 Champion International Corporation Apparatus for manufacturing filaments of varying denier and actuating means therefor
US4313578A (en) * 1978-07-27 1982-02-02 Appalachian Electronic Instruments, Inc. Yarn tension control apparatus
FR2597889A1 (fr) * 1986-04-28 1987-10-30 Univ Kazakhsky Dispositif electrique de freinage de fil de trame pour metier a tisser sans navette
EP0294323A1 (fr) * 1987-05-27 1988-12-07 GebràœDer Sulzer Aktiengesellschaft Frein de fil commandé électroniquement et utilisation d'un tel frein de fil

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2907535A (en) * 1958-01-02 1959-10-06 Lindly & Company Inc Yarn tensioning device
US3100091A (en) * 1961-03-20 1963-08-06 Lindley & Company Inc Yarn tensioning device
CH480255A (de) * 1968-10-23 1969-10-31 Sulzer Ag Fadenbremse
DE3446567C1 (de) * 1984-12-20 1986-05-07 Lindauer Dornier Gmbh, 8990 Lindau Schussfadenbremse mit stufenweise steuerbarer Bremswirkung
BE1002841A3 (nl) * 1989-02-16 1991-06-25 Picanol N V Naamloze Vennoosch Inrichting voor het remmen van een inslagdraad in een weefmachine.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4112561A (en) * 1977-02-24 1978-09-12 Champion International Corporation Apparatus for manufacturing filaments of varying denier and actuating means therefor
US4313578A (en) * 1978-07-27 1982-02-02 Appalachian Electronic Instruments, Inc. Yarn tension control apparatus
FR2597889A1 (fr) * 1986-04-28 1987-10-30 Univ Kazakhsky Dispositif electrique de freinage de fil de trame pour metier a tisser sans navette
EP0294323A1 (fr) * 1987-05-27 1988-12-07 GebràœDer Sulzer Aktiengesellschaft Frein de fil commandé électroniquement et utilisation d'un tel frein de fil

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2710659A1 (fr) * 1993-09-29 1995-04-07 Nuovo Pignone Spa Frein de fil de trame amélioré pour métier à tisser sans navette.
US5483997A (en) * 1993-09-29 1996-01-16 Nuovopignone - Industrie Meccaniche E Fonderia S.P.A. Blade type weft brake for a shuttleless loom
BE1008614A3 (fr) * 1993-09-29 1996-06-04 Nuovo Pignone Spa Frein de trame ameliore pour metier a tisser sans navette.
CN1035337C (zh) * 1994-09-29 1997-07-02 尤沃彼基奥尼工业机械股份公司 无梭织机的新型纬纱制动器
WO1997049850A1 (fr) * 1996-06-26 1997-12-31 Picanol N.V. Tendeur pour fils de trame
BE1010389A3 (nl) * 1996-06-26 1998-07-07 Picanol Nv Draadrem voor het remmen van een inslagdraad bij een weefmachine.
WO2003033385A1 (fr) * 2001-10-12 2003-04-24 Iropa Ag Tendeur de fil
EP1785383A1 (fr) 2001-10-12 2007-05-16 Iropa Ag Frein de fils
CN100341759C (zh) * 2001-10-12 2007-10-10 艾罗帕股份有限公司 纱线制动器
US7604024B2 (en) 2001-10-12 2009-10-20 Iropa Ag Yarn brake

Also Published As

Publication number Publication date
CN1063911A (zh) 1992-08-26
CH682926A5 (de) 1993-12-15
US5244164A (en) 1993-09-14
JPH04333643A (ja) 1992-11-20
RU2037579C1 (ru) 1995-06-19
EP0498758B1 (fr) 1996-05-01
DE59206144D1 (de) 1996-06-05

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