EP0451176B1 - Fadenliefervorrichtung - Google Patents

Fadenliefervorrichtung Download PDF

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Publication number
EP0451176B1
EP0451176B1 EP90900833A EP90900833A EP0451176B1 EP 0451176 B1 EP0451176 B1 EP 0451176B1 EP 90900833 A EP90900833 A EP 90900833A EP 90900833 A EP90900833 A EP 90900833A EP 0451176 B1 EP0451176 B1 EP 0451176B1
Authority
EP
European Patent Office
Prior art keywords
thread
delivery device
speed
drive
friction
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.)
Expired - Lifetime
Application number
EP90900833A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0451176A1 (de
Inventor
Lars Helge Gottfrid Tholander
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
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 Iro AB filed Critical Iro AB
Publication of EP0451176A1 publication Critical patent/EP0451176A1/de
Application granted granted Critical
Publication of EP0451176B1 publication Critical patent/EP0451176B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H59/16—Braked elements rotated by 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
    • 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
    • B65H59/18—Driven rotary elements
    • 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 delivery device according to the preamble of claim 1 and a method according to the preamble of claim 10.
  • an air nozzle near the yarn supply device is used as an auxiliary device, which, either alone or in cooperation with an arm which can be pivoted transversely to the yarn path, keep thread tension changes for the yarn storage and delivery device small during each take-off cycle of the yarn searches, which also result from the cyclically changing winding direction of the thread in the storage device designed as a bobbin.
  • the auxiliary device takes over, so to speak, part of the deduction work of the thread storage and delivery device.
  • the aim is to reduce the number of thread breaks.
  • the air nozzle represents a source of error in the thread path, since an exact adaptation of the action of the pneumatic auxiliary device on the thread to the thread speed in the thread storage and delivery device is difficult.
  • the invention has for its object to provide a yarn delivery device of the type mentioned and a method with which the number of yarn breaks in general and specifically in the yarn storage and delivery device is further reduced.
  • a mechanical friction drive acting on the thread with slip is able to adjust the thread speed upstream of the thread storage and delivery device so sensitively by means of an assist conveying that undesirably high loads for the thread are present in the thread storage and delivery device be avoided. This results in a noticeable decrease in thread breaks in general and in the thread storage and delivery device in particular.
  • the friction drive can be adapted to the take-off speed of the thread storage and delivery device with little control effort. It also dampens tension peaks that result from the changing winding direction of the thread (thread plucker) on the bobbin.
  • the friction drive is structurally simple, takes up little space and can be easily adapted to different thread qualities.
  • the surface that the thread touches must not be sticky, but should be relatively smooth, gentle on the thread and wear-resistant.
  • a hard chrome-plated aluminum rotating surface or a plasma-coated ceramic surface is well suited for this purpose.
  • the drive provides power for the thread; depending on the thread tension, the thread absorbs as much force as it needs to reach the required thread speed.
  • the thread storage and delivery device is largely relieved of this task. Modulation of the action on the thread is also possible by influencing the drive transmission in the friction drive.
  • Another embodiment is set out in claim 4.
  • the wrap angle of the thread in the friction drive By changing the wrap angle of the thread in the friction drive, the action on the thread can be modulated in that stronger assist support is controlled with a larger wrap angle, whereas weaker assist support is controlled with a smaller wrap angle.
  • the wrap angle serves as a control variable for the slip.
  • the thread deflection from the bobbin to the memory which was previously required in the usual vertical bobbin and horizontal thread storage and delivery device, is taken over by the friction drive as an additional advantage (claim 5).
  • the friction roller can be light and low inertia and can be quickly accelerated and decelerated to the required speed. Thread plucking from the bobbin compensates for the friction roller.
  • the clutch according to claim 6 causes the thread with the friction roller can also run without its direct drive if this is favorable under certain operating conditions. In the run-down phase in particular, the thread is pulled over the engaged clutch and the falling drive speed braked clean, which at least largely prevents the thread from running on due to its mass and thus an undesirable transfer.
  • the friction roller can be braked quickly with the braking device or can be braked specifically and modulated when working and generate a desired thread tension. If necessary, a one-way locking freewheel is then also provided.
  • the specially selected surface covering of the friction roller according to claim 8 also determines the slippage of the thread.
  • different surface coverings can be provided axially next to one another, of which the appropriate one is used.
  • the embodiment according to claim 9 is important because the speed control unit carries out the precise control of the friction drive as a function of the thread speed determined by the thread storage and delivery device. However, it is also conceivable to drive the friction drive independently, and the actual thread speed can only be achieved by modulating the action, e.g. through the slip to regulate. Even particularly sensitive or weak threads can be processed unbreakable at high speed.
  • a uniform adaptation of the thread speed for the thread storage and delivery device is achieved.
  • the thread no longer breaks even at high speed and relatively sharp deflection.
  • the deliberately controlled Difference in speed causes the slippage that is needed to assist the assist (braking or accelerating).
  • the process variant according to claim 11 is simple in terms of control technology. From the beginning, the increase in slip increases.
  • the work area is divided into several adjoining areas.
  • the thread e.g. braked in the phase-out phase of the thread storage and delivery device to prevent overrun, because the friction drive runs slower than the thread or stands still.
  • the friction drive can be uncoupled from its drive, the thread is then exposed to the mechanical resistance to movement of the friction drive, which suppresses tension fluctuations.
  • the friction drive which is driven faster than the thread, provides an excess speed that the thread with slippage absorbs at least in part if necessary.
  • the precisely metered assist delivery also suppresses tension fluctuations in the thread in this speed range.
  • the assist promotion brakes in the area of low thread speed, while it feeds at higher thread speed.
  • a delivery device 1 for a thread Y to a textile machine 2 e.g. an air jet weaving machine
  • an insertion device 3 e.g. an air nozzle provided to the textile machine.
  • the insertion device 3 is preceded by a thread eye 5 and a thread storage and delivery device 4, which, if a weft thread of dimensioned length is to be processed, can have a measuring device for the weft thread length respectively output.
  • a further thread eyelet 6 is provided upstream of the thread storage and delivery device 4.
  • a drive motor 7 of the thread storage and delivery device connected to a controller (not shown) drives a winding element 18, which winds the thread Y on a storage surface 19. With this type of thread storage and delivery device 4, a significant thread deflection occurs in the area 20, which can cause thread breaks at high thread speeds.
  • the thread Y comes from a thread supply device 8, for example a conical bobbin 9, on which it is wound, for example crossing with changing direction.
  • An auxiliary device 10 is arranged between the bobbin 9 and the thread eyelet 6, expediently close to the bobbin 9.
  • the auxiliary device 10 is a friction drive R with a friction roller 11, for example with a frictionally active surface.
  • the friction roller 11 is with an adjustable drive 12, for example one Stepper motor, in drive connection.
  • the control of the drive 7 of the thread storage and delivery device 4 is connected via a line 16 to a control unit 15 which is informed of the thread speed.
  • the drive 12 can also be connected to the control unit 15 via a line 17.
  • a clutch 13 that can be released and engaged, possibly modulated, can be arranged, which, when released, enables the friction roller 11 to run faster or slower than that Drive motor 12.
  • a modular braking device for the friction roller 11 could also be provided. If necessary, instead of the clutch 13, a freewheel that only locks in the drive direction is provided.
  • the coil 9 is vertical; the thread storage and delivery device 4, however, approximately horizontal.
  • the thread 4 is deflected on the friction roller 11 with a wrap angle ⁇ of approximately 90 °.
  • the angle ⁇ can be adjusted.
  • the entry device 3 pulls off the thread storage and delivery device 4, for example length sections which are exactly predetermined in length.
  • the drive motor 7 constantly maintains a thread supply in the thread storage and delivery device 4 and pulls the thread Y from the bobbin 9. This is done so that the thread runs practically continuously.
  • the pulling of the thread Y from the bobbin 9 is opposed by a certain unwinding resistance and possibly tension peaks when the winding direction changes (thread plucking).
  • the auxiliary device 10 assists in conveying the yarn Y at the speed required by the yarn storage and delivery device or brakes it so that changes in the tension in the yarn Y remain small. Tension fluctuations due to changing winding direction (thread plucking) on the bobbin 9 are compensated or filtered out by the auxiliary device 10 and are almost no longer noticeable in the area 20 of the thread deflection in the device 4.
  • the exact control of the drive motor 12 or the friction roller 11 in accordance with the speed in the thread storage and delivery device 4 is particularly important because it influences the speed (friction) during the sharp deflection of the thread, e.g. at the outlet of the winding element 18 is eliminated.
  • speed e.g. at the outlet of the winding element 18 is eliminated.
  • excessive thread tension and dangerous changes in tension are largely avoided in area 20 by the assistance promotion, ie factors that were a suspected cause of thread breaks occurring there.
  • the thread speed KY remains below the peripheral speed KR of the friction drive in the entire working area. Both speed curves are idealized as straight lines with different increases. Between the thread and the friction drive, an increasing slip occurs with increasing thread speed, so that the friction drive can always push when the thread storage and delivery device 4 requires it.
  • the curve KY of the thread speed VY is divided into three areas A, B, C.
  • Area A ranges up to a relative low speed reference value a; the range B from a to a higher speed reference value b; the range C from b to the highest speed reference value c (max. thread speed value VYmax).
  • the thread is braked by the friction drive, which may be stationary.
  • the clutch is engaged. This is particularly important in the phase-out phase.
  • area B the clutch is released.
  • the friction drive turns freely with the thread; slip occurs due to the rotational resistance of the friction drive.
  • area C the friction drive is driven with a positive excess speed, the clutch is engaged.
  • the thread is fed with slip.
  • the slip decreases and the assisted support increases or vice versa. Again, the tension is kept relatively low and even.
  • the result is an inconsistent speed curve KR for the friction drive, the curve KR in FIG. 3 being exaggerated or idealized.
  • a reference speed value d along the curve KY e.g. depending on the thread quality, selected so that there are two areas D, E.
  • VY With increasing thread speed VY, the friction drive in area D is driven more slowly than the thread until the friction drive curve KR crosses curve KY at point d.
  • area E the friction drive is driven with increasing excess speed.
  • the curve KR can ideally be a straight line (FIG. 4a) or a flat S curve (FIG. 4b) with the turning point at point d. Under special operating conditions, the friction drive could also be driven with the thread movement in the opposite direction in order to intentionally generate an even stronger braking.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
EP90900833A 1988-12-31 1989-12-29 Fadenliefervorrichtung Expired - Lifetime EP0451176B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE19898900006A SE8900006D0 (sv) 1988-12-31 1988-12-31 Anordning vid en garnlager- och matningsenhet foer textilmaskiner foeretraedesvis vaevmaskiner
SE8900006 1988-12-31

Publications (2)

Publication Number Publication Date
EP0451176A1 EP0451176A1 (de) 1991-10-16
EP0451176B1 true EP0451176B1 (de) 1993-11-18

Family

ID=20374663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90900833A Expired - Lifetime EP0451176B1 (de) 1988-12-31 1989-12-29 Fadenliefervorrichtung

Country Status (7)

Country Link
US (1) US5385310A (ja)
EP (1) EP0451176B1 (ja)
JP (1) JP3141137B2 (ja)
KR (1) KR0140237B1 (ja)
DE (1) DE58906222D1 (ja)
SE (1) SE8900006D0 (ja)
WO (1) WO1990007600A1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH685778A5 (de) * 1991-05-24 1995-09-29 Rueti Ag Maschf Vorrichtung zum Zuführen eines Schussfadens an eine Schusseintragseinrichtung einer Webmaschine.
WO1994012709A1 (de) * 1992-12-03 1994-06-09 Iro Ab Verfahren zum steuern eines fadenliefersystems und fadenliefersystem
DE4324160A1 (de) * 1993-07-19 1995-01-26 Iro Ab Eintragsystem für eine Düsenwebmaschine
DE19841699A1 (de) 1998-09-11 2000-03-16 Iro Patent Ag Fadenverarbeitungssystem
DE19942121A1 (de) * 1999-09-03 2001-03-08 Iro Patent Ag Baar Verfahren zum Steuern eines Fadenverarbeitungssystems und Fadenverarbeitungssystem
WO2012174514A1 (en) 2011-06-16 2012-12-20 American Linc, Llc Overfeed roller assembly, textile, and method of adjusting tension in a running yarn

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT312146B (de) * 1967-09-13 1973-12-27 Morat Gmbh Franz Fadenzuführung an einer Strickmaschine
CH454697A (de) * 1967-09-26 1968-04-15 Schaerer Maschf Fadenlieferwerk
GB1262179A (en) * 1968-10-14 1972-02-02 Rosen Karl I J Thread storage and delivery device for textile machines
US3831873A (en) * 1970-05-26 1974-08-27 Leesona Corp Take-up system
FR2278817A1 (fr) * 1974-07-17 1976-02-13 Inst Textile De France Dispositif d'alimentation en fil pour metier de bonneterie
JPS6032041Y2 (ja) * 1978-11-07 1985-09-25 帝人株式会社 糸条処理ロ−ラ
US4403634A (en) * 1980-04-01 1983-09-13 Sulzer Brothers Limited Weft yarn storage device for weaving machines
DE3412550A1 (de) * 1984-04-04 1985-10-17 SIPRA Patententwicklungs- und Beteiligungsgesellschaft mbH, 7470 Albstadt Vorrichtung fuer positive fadenlieferung an textilmaschinen
DE3437252C1 (de) * 1984-10-11 1986-01-16 Gustav 7290 Freudenstadt Memminger Fadenspeicher- und -liefervorrichtung,insbesndere fuer Textilmaschinen

Also Published As

Publication number Publication date
US5385310A (en) 1995-01-31
JP3141137B2 (ja) 2001-03-05
KR910700371A (ko) 1991-03-15
DE58906222D1 (de) 1993-12-23
EP0451176A1 (de) 1991-10-16
WO1990007600A1 (de) 1990-07-12
JPH04502652A (ja) 1992-05-14
KR0140237B1 (ko) 1998-07-01
SE8900006D0 (sv) 1988-12-31

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