WO2020126767A1 - Guide-fil avec buse de flux d'air intégrée - Google Patents

Guide-fil avec buse de flux d'air intégrée Download PDF

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Publication number
WO2020126767A1
WO2020126767A1 PCT/EP2019/084730 EP2019084730W WO2020126767A1 WO 2020126767 A1 WO2020126767 A1 WO 2020126767A1 EP 2019084730 W EP2019084730 W EP 2019084730W WO 2020126767 A1 WO2020126767 A1 WO 2020126767A1
Authority
WO
WIPO (PCT)
Prior art keywords
thread
air
main body
insert element
channel
Prior art date
Application number
PCT/EP2019/084730
Other languages
German (de)
English (en)
Inventor
Dietmar Tränkle
Original Assignee
Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh
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 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh filed Critical Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh
Publication of WO2020126767A1 publication Critical patent/WO2020126767A1/fr

Links

Classifications

    • 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
    • D04B15/54—Thread guides
    • D04B15/58—Thread guides for circular knitting machines; Thread-changing devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H57/00—Guides for filamentary materials; Supports therefor
    • B65H57/12—Tubes
    • 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
    • B65H59/105—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 the material being subjected to the action of a fluid
    • 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
    • D04B15/44—Tensioning devices for individual threads
    • 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 guide device in a textile machine, in which one or more threads under tension are processed.
  • the invention relates to textile machines working with jacquard technology, in particular circular knitting machines with jacquard selection, in which the thread under tension is processed with varying consumption.
  • the decrease in the thread on the processing side varies depending on the selected jacquard pattern: if the consumption drops, more thread is added for a short time (already due to the inertia of the thread or the feeder providing the thread). As a result, the thread tension drops abruptly. In addition, the excess thread can form a loop which, due to the vibration, can reach the knitting point at high speed (so-called whip effect). The needle may then no longer catch the thread there, resulting in errors in the knitted fabric of the knitted fabric produced. The faster the machine works, the more serious the problem becomes.
  • the air flow device Since the thread running direction and the air flow direction run parallel or antiparallel to each other, the air flow device must be set up in such a way that air can be supplied to the thread channel through which both the thread and the opposite air flow are transported from the side lying in the thread transport direction.
  • at least one air deflection device such as a deflection nozzle, connected to a compressed air connection must be provided between the thread outlet and the knitting point, as a result of which a certain additional distance from the knitting point is required.
  • the removable insert element can also be easily replaced. It is conceivable that different insert elements differ in the shape of the air and thread channel and thus in the speed or acceleration of the air flow. Depending on the speed, nature and basic tension of the thread to be processed, an appropriate insert element can be selected, which ensures an optimal air flow speed in this constellation.
  • insert elements which differ in the direction of the air flow relative to the thread transport direction by suitably deflecting the air flow.
  • an insert element in which the air flowing in through the air inlet flows through the thread channel counter to the thread transport direction and leaves it through the thread inlet
  • an insert element could also be used in which the air flowing in through the air inlet flows through the thread channel in the thread transport direction in order to then exit together with the thread from the thread outlet of the thread channel.
  • the thread can be guided particularly evenly to the knitting point by the rectified air stream surrounding it, which is particularly advantageous when knitting, when the thread has to be guided through the thread guide device to the processing tools.
  • An air flow transverse to the thread transport direction for example in the angular range from 75 ° to 105 ° or preferably at an angle of 90 °, can also be achieved by using a suitably designed insert element (a loop that may form on the other side of the thread can then be used in a recess provided in the insert element on the side of the thread channel opposite the air inlet).
  • the control of the air flow velocity is not necessarily based exclusively on the geometry of the insert element; in addition, an air supply control can also be used to control the air output in an air flow generating device.
  • Air emissions can be constant; it can also be set manually or controlled automatically. Both static and dynamic controls are possible here.
  • the control of the air output can be coordinated with the control of a jacquard pattern processing. If several air nozzles are provided within a textile machine, the air output for the air nozzles can be controlled jointly or individually.
  • the insert element can be designed like a cover, so that it can easily be attached and removed from an intended opening, for example on the side of the main body of the thread guide device. It can also be designed in such a way that it can be attached in two different positions and / or orientations, whereby in one of the two it provides for an air flow in the thread channel which is opposite to the thread transport direction and in the other a similar creates a common air flow.
  • the insert element can be a cover with a rotationally symmetrical shape, in which the two positions can each be achieved by rotating the cover, for example by rotating through 90 °, 180 ° or 270 °.
  • the insert element for example in a continuous cylindrical shape, to be inserted into a cutout which completely penetrates the main body of the thread guide device, so that it not only covers a section of the thread channel but also contains the corresponding section entirely.
  • the thread guide device of the present invention can be part of a larger thread processing device such as a knitting, knitting, weaving or sewing machine or a machine for rewinding or transporting a thread. Its advantages are particularly effective in circular knitting machines, particularly those with varying thread consumption, such as a jacquard machine; but it can also be used for thread processing devices with constant thread consumption.
  • the present invention makes it possible to maintain the production quality of a textile machine even at high speed factors by reducing whip effects, without losing valuable space in the course between the thread guide device and processing point.
  • the thread guide device according to the invention can be provided on each system or only on a few, preferably on those with varying thread consumption.
  • Figure 1 is a perspective view of the thread guide device according to an embodiment of the invention.
  • Figure 2 is a side view of the thread guide device;
  • Figure 3 is a cross-sectional view of the thread guide device (cut in the sheet plane of Figure 2);
  • Figure 4a is a partially transparent top view of the insert element in a first position
  • FIG. 4b shows a partially transparent top view of the insert element in a second position
  • FIG. 5 shows a further cross-sectional view of the thread guide device with the insert element inserted in the first position
  • Figure 6 is a perspective view of the thread guide device with its connection to an airflow generating device
  • Figure 7 is a side view of a circular knitting machine with the thread guide device of the embodiment.
  • threads from thread delivery devices are fed to a rotating knitting tool carrier, the knitting tools of which then process the threads as knitting elements at the knitting points that are assigned to the respective threads.
  • the thread is processed under tension.
  • the thread can be delivered with a constant, constant thread feed from positive thread delivery devices (positive feeders) without slippage.
  • positive thread delivery devices positive feeders
  • the consumption of the thread taken from a storage supplier varies.
  • Figure 7 shows the transport path of the thread F in a jacquard circular knitting machine according to an embodiment of the invention, starting from a supplier 1 1 as a thread preparation unit, which pulls the thread F from the spool of thread and stores it temporarily on a thread storage wheel, to the thread guide device 10 directly in front of the knitting point (for reasons of clarity, only a single knitting point is shown in the side view of the figure).
  • the thread F is then processed by the knitting tools arranged on a rotating support for stitch formation. While the thread transport path in the figure leads in a straight line from the feeder 3 to the knitting point, the thread on its way from the feeder 3 to the knitting point can also be guided over one or more thread guide or deflection elements which change the direction of the thread.
  • a tension that is as uniform as possible is required to process the thread at the knitting point; on the other hand, with a jacquard knitting machine, the thread consumption at the knitting point varies depending on the jacquard pattern selected.
  • the feeder 3 delivers the thread with a constant or at least uniform thread tension as far as possible in such a way that even if the thread consumption suddenly drops, not too much thread shoots in.
  • the feeder reaches its limits at high feed and processing speeds; a suddenly decreasing thread consumption can lead to too much thread feeding. The result of this is a momentary loss of thread tension and then, under certain circumstances, the formation of loops running or whipping up to the knitting point, which ultimately lead to knitting errors.
  • FIGS 1 to 3 each show the thread guide device 10 in a perspective view, a side view and a sectional view.
  • the thread F passes through the thread guide device through a straight thread channel 3 in the main body 1 from the thread inlet opening 1 a to a thread outlet opening 1 b (see FIG. 3).
  • the thread guide device also has a Air inlet opening 1 c, from which the air supplied from the outside is guided through the insert element 2 into the thread channel 3.
  • the insert element covers a section 3 a of the thread channel 3 and, however, covers the air coming from the air inlet 1 c into the thread channel 3 through nozzles 4.
  • the air deflected and accelerated by the nozzles then flows against the thread F in the thread channel 3 and finally out of the thread guide device through the thread inlet opening.
  • the air flow exerts a force on the thread that is opposite to the direction of transport of the thread. If a sudden loss of thread tension occurs, for example due to a decrease in the thread consumption at the knitting position, which cannot be compensated for quickly enough by the thread brake of the supplier, the air flow ensures that no excess thread reaches the knitting point, forms a loop there and can trigger a whip effect.
  • the thread tension which is exerted by the air flow on the thread, maintains a thread tension sufficient for reliable knitting processing.
  • the thread tension maintained depends on the strength of the air flow as well as on the design of the insert element, in particular the positioning of the nozzles 4.
  • the air supply can be designed to be controllable, so that the air flow can be adapted according to the respective requirements, which can be determined, for example, by the nature, the feed speed and the basic tension of the thread as well as by the thread guidance within the knitting machine. It is also possible to control the air supply in coordination with the jacquard control of the knitting stitch, for example by automatically increasing the air flow if a decrease in thread consumption is foreseeable due to the jacquard control. In this way, voltage compensation can be achieved at any time, adapted to the current demand.
  • FIGS. 4a, 4b and 5 show the possible positions of the insertion element 2 in the main body 1 of the thread guide device.
  • the air is guided in each case via an air duct parallel to the thread duct 3a to openings 4, from which it is then introduced into the thread duct 3a transversely via further openings 4. While in FIGS. 4a and 5 the air flow is opposite to the thread transport direction as described above (see arrow in the thread channel 3a in the figure), the nozzles 4 in FIG. 4b introduce the air in the thread transport direction into the thread channel 3a. In this way, the air flow can further stabilize the thread transport precisely when the thread consumption at the knitting point varies little due to a corresponding jacquard control (or in the absence of such) and lead the thread more specifically to the needles at the knitting point. Both positions can be achieved by inserting the cover-like insert element 2 into the main body with corresponding orientations that differ by 180 °.
  • the lid-like insert element 2 can also be configured differently than shown in FIGS. 4a and 4b. For example, it can have only one possible attachment position, then with a fixed air flow direction, and / or it can be replaced by other insert elements in which different air flow directions or speeds can be achieved by the appropriate design of the air channels and nozzles 4 therein. The position of the insert element or the selection from different insert elements can then be adapted as required.
  • Circular knitting machines generally have a large number of knitting points, each with its own thread feeder, of which only one is shown here by way of example in the figures.
  • the thread feeds of all or only some of the knitting points can be equipped with the thread guide device described above.
  • the control of the air flow rate and the selection and positioning of the insert elements can be carried out individually or together for the different knitting points.
  • FIG. 6 shows the connection of the thread guiding device to the air flow generating device 12 via an air hose or the like.
  • the connection of the air hose with the main body 1 of the thread guide device via the thread inlet 1 c is not on the knitting side of the thread guide device.
  • neither the air flow generating device 12, the air inlet 1c nor the air duct guide within the insert element 2 require space on the knitting site side, so that the distance between the thread guiding device and the knitting site can be kept small.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Abstract

La présente invention concerne un dispositif de guidage de fil dans une machine textile, dans lequel sont traités un ou plusieurs fils placés sous tension. Le ou les fils sont redirigés ou transférés du dispositif de guidage de fil vers un point de traitement de fil, le dispositif de guidage de fil comprenant un corps principal (1) muni d'une ouverture de raccordement d'air et un élément d'insertion (2) qui peut être installé depuis l'extérieur dans le corps principal et en être retiré. Le fil est transporté par l'élément d'insertion installé à travers un canal de fil (3) comprenant une entrée de fil (1a) et une sortie de fil (1b), le canal de fil s'étendant partiellement dans le corps principal et partiellement, dans l'élément d'insertion et présentant dans une partie (3a) traversant l'élément d'insertion, une entrée d'air (1c) pour l'air s'écoulant à travers l'ouverture de raccordement d'air. Le dispositif de guidage de fil peut être utilisé en particulier sur des machines textiles travaillant selon la technique Jacquard, en particulier sur des machines à tricoter circulaires avec option Jacquard, dans lesquelles le fil sous tension est traité avec une consommation variable.
PCT/EP2019/084730 2018-12-20 2019-12-11 Guide-fil avec buse de flux d'air intégrée WO2020126767A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018133147.9 2018-12-20
DE102018133147.9A DE102018133147A1 (de) 2018-12-20 2018-12-20 Fadenführer mit integrierter Luftströmungsdüse

Publications (1)

Publication Number Publication Date
WO2020126767A1 true WO2020126767A1 (fr) 2020-06-25

Family

ID=68887418

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/084730 WO2020126767A1 (fr) 2018-12-20 2019-12-11 Guide-fil avec buse de flux d'air intégrée

Country Status (3)

Country Link
DE (1) DE102018133147A1 (fr)
TW (1) TW202026478A (fr)
WO (1) WO2020126767A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113089199B (zh) * 2021-04-08 2022-06-21 上海富山精密机械科技有限公司 一种用于缝纫机的智能线张力平衡装置及缝纫机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS504782B1 (fr) * 1970-11-18 1975-02-24
DE3603913A1 (de) * 1985-02-11 1986-08-14 James W. Redmond Wash. Taylor jun. Pneumatische fadenspannungseinrichtung
DE202016001658U1 (de) 2016-03-14 2016-08-01 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Textilmaschine mit gleichmäßiger Fadenspannung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1456043A (en) * 1972-11-09 1976-11-17 Schuster & Co F M N Winding machines
DE3701671C2 (de) * 1987-01-22 1994-11-03 Stoll & Co H Flachstrickmaschine
FR2634791B1 (fr) * 1988-07-28 1990-10-05 Cogetex Comp Gen Textile Dispositif pour le maintien en tension d'un fil textile elastique
US6390349B1 (en) * 1999-06-02 2002-05-21 Mikros Manufacturing, Inc. Device and method for inducing a longitudinal force into a filament
GB0008304D0 (en) * 2000-04-06 2000-05-24 Univ Manchester Precision delivery system
SE0200745D0 (sv) * 2002-03-12 2002-03-12 Iropa Ag Pneumatischer Fadenstrecker und Fadenverarbeitungssystem

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS504782B1 (fr) * 1970-11-18 1975-02-24
DE3603913A1 (de) * 1985-02-11 1986-08-14 James W. Redmond Wash. Taylor jun. Pneumatische fadenspannungseinrichtung
DE202016001658U1 (de) 2016-03-14 2016-08-01 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Textilmaschine mit gleichmäßiger Fadenspannung

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DE102018133147A1 (de) 2020-06-25
TW202026478A (zh) 2020-07-16

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