EP2027316A1 - Procédé de serrage d'un fil de trame dans un métier à tisser à tuyères, notamment métier à tisser à tuyères à air, dispositif de serrage et métier à tisser à tuyères - Google Patents

Procédé de serrage d'un fil de trame dans un métier à tisser à tuyères, notamment métier à tisser à tuyères à air, dispositif de serrage et métier à tisser à tuyères

Info

Publication number
EP2027316A1
EP2027316A1 EP07722326A EP07722326A EP2027316A1 EP 2027316 A1 EP2027316 A1 EP 2027316A1 EP 07722326 A EP07722326 A EP 07722326A EP 07722326 A EP07722326 A EP 07722326A EP 2027316 A1 EP2027316 A1 EP 2027316A1
Authority
EP
European Patent Office
Prior art keywords
clamping
mixing tube
clamping member
clamping device
actuator
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
EP07722326A
Other languages
German (de)
English (en)
Other versions
EP2027316B1 (fr
Inventor
Markus Gielen
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.)
Lindauer Dornier GmbH
Original Assignee
Lindauer Dornier GmbH
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 Lindauer Dornier GmbH filed Critical Lindauer Dornier GmbH
Publication of EP2027316A1 publication Critical patent/EP2027316A1/fr
Application granted granted Critical
Publication of EP2027316B1 publication Critical patent/EP2027316B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems
    • D03D47/306—Construction or details of parts, e.g. valves, ducts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • B65H63/088—Clamping device
    • 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

  • NOZZLE WEAVING MACHINE ESPECIALLY AIR WET WOVEN MACHINE
  • the invention relates to a method for clamping a weft thread in a jet loom, in particular air jet loom, according to the preamble of claim 1.
  • the invention further relates to a clamping device on a weaving machine, in particular air jet machine according to the preamble of claim 11.
  • the invention also relates to a jet loom according to the The preamble of claim 22.
  • a device for entering a weft thread is provided in the shed on a jet loom, which consists of a block of Hauptblasdüsen with connected mixing tubes.
  • a clamping device is provided, by means of which the weft thread located in the mixing tube is held straight in alignment before it is introduced into the shed.
  • Each of these clamping devices has an actuator located outside the mixing tube, which can be pneumatically or piezoelectrically actuated and deformed. Characterized a connected to the actuator clamping member is placed in a tilting or pivoting movement.
  • the clamping member engages in the mixing tube and clamps with its free end the weft thread against an abutment located on the mixing tube.
  • the embodiment of the actuator in the form of an elastomeric bellows, which is directly connected to the clamping member.
  • a spring or a bending elastic holding element can influence the respective position of the clamping member.
  • the clamping member itself can be elastically deformed.
  • the known clamping devices according to DE 10 2004 036 996 B3 are already constructed from modular units of two clamping devices; several can do this Module units are combined into a block. Nevertheless, relatively little space is available for the individual clamping unit.
  • the holding force of a pneumatically actuated holding device is dependent on its size. If the dimensions must be small, the holding power is limited. The same applies to a hydraulic or piezoelectric actuation of the actuators.
  • the compressibility of the controlling air flows is still disturbing. This leads to a delayed response of the clamping device.
  • the clamping member is set in the transition from its clamping position to the release position and vice versa in vibrations, so that particularly fine weft threads are no longer reliably clamped timely.
  • the delayed response of the clamping devices can already lead to disturbances in the weaving process at today's speeds of up to 1000 U / min in modern weaving machines.
  • a further pneumatically operated clamping device of holding weft yarns on jet looms is known.
  • the clamping member is located there similar to a non-return valve at the outlet of the mixing tube, where it is pivotally mounted on a hinge located outside the mixing tube and is retracted by a tension spring also located outside in the outlet opening of the mixing tube.
  • a weft thread is clamped against a shoulder which forms part of the outlet opening.
  • the blowing air flow of the main blowing nozzle which introduces the weft threads is intended to open the clamping member against the action of the spring and thereby release the clamped weft thread.
  • an exact, fast-running and precisely controllable transition from the clamping position into the release position can not be expected because the control of the clamping member inseparably linked to the transport of the weft thread.
  • the invention has for its object to provide a method and a clamping device of the initially mentioned type with which in a simple, compact design, a reliable holding power can be achieved in conjunction with an accurate response, so that a nearly trouble-free weaving operation even at high speeds the weaving machine is possible.
  • the solution of this problem is inventively achieved by the totality of the features of claim 1 and in terms of the clamping device according to the invention by the totality of the features of claim 11 in terms of the method.
  • Claim 22 is directed to a jet loom having the clamping device according to the invention.
  • an amplification of the clamping force of the movable clamping member is achieved by an additional magnetic force. Since the holding and clamping force is applied substantially by the magnetic force, the components for operating the clamping device can be dimensioned smaller despite safe operation. It is thus a particularly compact design possible, so that the main blowing nozzles and mixing tubes can be arranged advantageously and as straight as possible weft yarn guide is guaranteed up to the weft insertion channel of the reed.
  • the amount of reinforcing magnetic force is advantageously adapted to the properties of the weft thread, so that an additional clamping is ensured without significantly affecting the quality of the weft thread at the nip.
  • the magnetic reinforcement is designed such that the release of the movable clamping member from its clamping position initially inhibited, but its approach to the clamping position is accelerated.
  • the holding force of the movable clamping member is magnetically reinforced in its release position. If further measures are taken to the fact that the release of the clamping member initially inhibited from its release position, but its approach to the release position is accelerated, so that overall the dynamic behavior of the clamping member in the mixing tube is influenced very beneficial.
  • the magnetic force acts on the clamping member in the first end position until the actuating force originating from the actuator is built up on the clamping member, which is larger than the attracting magnetic force. If this point is reached, then the clamping member goes almost abruptly in the second end position. As well When approaching the respective second end position, an acceleration is achieved by the attractive magnetic force.
  • the method may be performed by actuating the actuator hydraulically or piezoelectrically.
  • control of the actuator by means of a separate pneumatically acting control fluid.
  • the magnetic reinforcement in the clamping position and / or the release position of the clamping member can be made permanently magnetic in a particularly simple manner.
  • the permanent magnetic amplification is temporarily canceled by a controlled electromagnet.
  • z. B. reduces the release force for releasing the clamping member controlled from its end positions or canceled and operated the clamping device with a further lower pressure.
  • Reinforcement is generated by at least one electromagnet.
  • the control of the solenoid (s) is then incorporated into the loom control.
  • the clamping force can be adjusted during operation to changed yarn properties or operating conditions. If, for example, a sensitive weft yarn is processed, then the magnetic force the electromagnet and thus the clamping force of the clamping member are set to a lower value, and damage to the weft yarn at the nip are avoided.
  • Robust yarns with a smooth surface can be processed with a high clamping force to ensure that the yarns are held securely despite the smooth surface.
  • the temporal occurrence of the magnetic force to various operating conditions such as different speeds of the loom can be adjusted.
  • the invention made possible by the particularly compact design of the associated clamping device makes it possible to make the magnetic reinforcement of the clamping member at each point of Hauptblasdüse and mixing tube.
  • a particularly advantageous possibility is that the weft thread is clamped in the mixing tube, as is known from the aforementioned DE 10 2004 036 996 B3.
  • clamping device is provided as an advantageous development that the magnetic reinforcement is carried out by at least one holding magnet in cooperation with the clamping member not only in the clamping position, but also in the release position of the clamping member.
  • Elastomer bellows is formed by the overpressure, pressure equalization over the
  • Ambient or negative pressure is pneumatically controlled and deformed and is in communication with the clamping member such that the pneumatic deformation of the
  • Elastomerbalgs causes a tilting or pivoting movement of the clamping member for the transition from the clamping position to the release position or vice versa.
  • the clamping member may be attached directly to the elastomer bellows.
  • Elastomer bellows trained actuator is deformed or deformed by air as the actuating means, resulting in the tilting movement of the clamping member.
  • Tilting movement when releasing the clamping member from the clamping position or the release position inhibited by the magnetic force and accelerated when approaching the clamping member to the respective opposite position by the magnetic force.
  • the reinforcing magnetic force is particularly advantageous because it not only prevents delays caused by the compressibility of the air. In addition, delays are avoided, which are caused by the resistance with which the elastomer bellows opposes in its deformation of the pneumatic actuating force. In addition, such an elastomer bellows will be deformed at least in one end position and therefore constantly oppose the clamping or holding force in this end position an opposing force; because the elastomer bellows strives to return to its undeformed initial shape.
  • the installation of the holding magnets causes the clamping member is held securely in one of the end positions even in the unpressurized state. This ensures, for example, in the release position that the clamping member does not hinder the free passage through the Hauptblasdüse and the mixing tube by being always held by the magnetic force outside the conveying air flow.
  • clamping member is arranged at a position of the mixing tube and the actuator is located outside the mixing tube, so there is a compact design, in which on the one hand the main blowing nozzles and the clamping devices can be combined in blocks.
  • the detailed solutions already described in DE 10 2004 036 996 B3 can advantageously be taken over in the constructive embodiment.
  • the subdivision of the mixing tube in a longer initial section and a much shorter end portion is not just a stopgap solution
  • the significantly shorter end portion of the mixing tube causes, above all, that the free end of the Weft thread after cutting the registered weft thread section can not collide with the clamping device and therefore does not strike back. By dividing the mixing tube thus takes place a decoupling of the clamping device from the thread end.
  • the arrangement of two clamping devices each with directly adjacent mixing tubes to a module unit in a first plane not only brings the advantage of compact design, but also makes it possible that at least one holding magnet can be used together for each two clamping devices; because of the known and adopted from DE 10 2004 036 996 B3 module unit causes the beginning and end portions of the mixing tube closely adjacent and mirror images of each other.
  • the actuators are provided on the outside of the mixing pipe sections; therefore, a holding magnet located between the mixing tube sections of both clamping devices may optionally be effective for both clamping devices.
  • Fig. 1 shows an apparatus for introducing four weft threads, which operates according to the inventive method and contains inventively designed clamping devices.
  • FIG. 2 shows a modular unit to which two clamping devices according to the invention are combined.
  • Fig. 3 illustrates the function of the clamping device according to the invention, wherein according to Fig. 3a, their release position and according to FIG. 3b, its clamping position is shown.
  • Fig. 1 shows an example of a jet loom a block 17 with four main blowing nozzles 1, to which the mixing tubes 2 connect. Via the connections 13, the main blowing nozzles 1 are supplied with compressed air, which serves to introduce the weft threads 3.
  • the illustrated example allows weaving with four different colors or four different materials of weft yarns 3.
  • the weft yarns 3 through the main blowing nozzles 1 and through the mixing tubes 2 therethrough not shown weft insertion channel of a reed and thus supplied to the shed.
  • the mixing tube 2 is divided into a longer initial section 2.1 and a comparatively shorter end section 2.2. The separation point between the beginning and the end section 2.1, 2.2 is located within the clamping devices, of which in Fig. 1, a common, four clamping devices comprising module unit 18 can be seen.
  • the relevant weft thread 3 After leaving the end section 2.2 of the associated mixing tube 2, the relevant weft thread 3 passes into the shed, is struck by the reed at the binding point and cut off by a scissors located between the end section 2.2 and the fabric edge. Beforehand, however, the weft thread 3 is clamped in the mixing tube 2 by its associated clamping device located in the modular unit 18, so that it does not spring back into the mixing tube 2.
  • the block 17 and the module unit 18 are mounted on a common base plate 4, which serves for attachment to the sley, not shown, of the jet loom.
  • Denoted by 11 and 12 are holding magnets which will be explained later; the same applies to the schematically indicated pumps 15 and the valve 16.
  • a single module unit 18 is shown spatially and enlarged.
  • two clamping devices 5 are mounted one above the other and close to each other in a frame-like carrier 14.
  • the frame-like support 14 causes the assembly of the mixing tubes 2 is additionally stiffened with the clamping devices 5 in the end region of the mixing tubes 2.
  • the clamping devices 5 are arranged with closely adjacent end portions 2.2 of the mixing tube 2, wherein the associated actuators 6 are outside.
  • the clamping devices 5 also have clamping members 7, which can perform a tilting or pivoting movement and thereby dive into engagement openings 8.
  • Clamping devices 5 can be seen with all details and in various variants from DE 10 2004 036 996 B3 of the applicant. The embodiments shown there are all for the present invention with magnetic amplification of Holding force suitable. An exemplary embodiment of this will be apparent from FIG. 3 described below.
  • Fig. 3a shows a clamping device 5 according to the invention in the release position of the clamping member 7, in which the weft thread 3 is not clamped.
  • an actuator 6 which is designed as an elastomer bellows with a chamber 10.
  • the chamber 10 is connected via a supply line 20 to the valve 16, which is a pneumatic valve in the present example.
  • the unillustrated control unit of the weaving machine controls the electromagnetically operable valve 16 and thereby can pressurize the chamber 10 of the actuator 6 with air, which is under pressure or is pressureless to the environment.
  • the clamping member -7 is connected, which is designed as a lever with a long lever arm 7.1 and an angled short lever arm 7.2.
  • the clamping member 7 is inserted into a slot in the elastically deformable
  • Actuator 6 is formed.
  • the angled short lever arm 7.2 is opposite to an engagement opening 8, which separates the mixing tube 2 in an initial section 2.1 and an end section 2.2. Beginning section 2.1 and end section 2.2 are connected to each other by an abutment 9.
  • the clamping member consists of a ferromagnetic material.
  • the clamping device 5 also has a stop member 19, which may be formed on the frame-like carrier 14.
  • a first holding magnet 11 and in the stop member 19 a second holding magnet 12 is inserted, for. B. poured.
  • the chamber 10 is pressureless with respect to the environment.
  • the formed as an elastomer bellows actuator 6 is therefore in its relaxed state in which the associated clamping member 7 is parallel to the mixing tube 2 and the weft thread 3 is not clamped.
  • the clamping member 7 is held by the second holding magnet 12 in the release position.
  • Fig. 3b the state is shown, in which via the valve 16 and the supply line 20, the chamber 16 of the actuator 6 is charged with air under elevated pressure.
  • the clamping member 7 connected to the actuator 6 follows the deformation and therefore causes a tilting or pivoting movement from, wherein it dives with its angled short lever arm 7.2 in the engagement opening 8 and comes to the abutment 9 in the region of the first holding magnet 11 to the plant.
  • the clamping member 7 presses thereby the weft thread 3 to the abutment 9 with the first holding magnet 11 and holds the weft thread 3 by clamping.
  • the holding force of the first holding magnet 11 thus amplifies the clamping force exerted by the pneumatically deformed actuator via the clamping member.
  • the short end section 2.2 of the mixing tube 2 has mainly the function of preventing the cut end of the weft thread 3 from colliding with the clamping device 5.
  • a separate valve 16 is provided for each weft thread 3 and thus for each Hauptblasdüse 1 and each clamping device 5. The control of the individual valves 16 takes place depending on which weft thread just has to be entered.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Treatment Of Fiber Materials (AREA)
EP07722326A 2006-06-02 2007-04-28 Procédé de serrage d'un fil de trame dans un métier à tisser à tuyères, notamment métier à tisser à tuyères à air, dispositif de serrage et métier à tisser à tuyères Not-in-force EP2027316B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006025968A DE102006025968B3 (de) 2006-06-02 2006-06-02 Verfahren zum Klemmen eines Schussfadens in einer Düsenwebmaschine, insbesondere Luftdüsenwebmaschine, Klemmeinrichtung und Düsenwebmaschine
PCT/DE2007/000769 WO2007140737A1 (fr) 2006-06-02 2007-04-28 Procédé de serrage d'un fil de trame dans un métier à tisser à tuyères, notamment métier à tisser à tuyères à air, dispositif de serrage et métier à tisser à tuyères

Publications (2)

Publication Number Publication Date
EP2027316A1 true EP2027316A1 (fr) 2009-02-25
EP2027316B1 EP2027316B1 (fr) 2009-09-16

Family

ID=38450117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07722326A Not-in-force EP2027316B1 (fr) 2006-06-02 2007-04-28 Procédé de serrage d'un fil de trame dans un métier à tisser à tuyères, notamment métier à tisser à tuyères à air, dispositif de serrage et métier à tisser à tuyères

Country Status (9)

Country Link
US (1) US7753084B2 (fr)
EP (1) EP2027316B1 (fr)
JP (1) JP5026513B2 (fr)
CN (1) CN101460669B (fr)
AT (1) ATE443171T1 (fr)
BR (1) BRPI0712120A2 (fr)
DE (2) DE102006025968B3 (fr)
RU (1) RU2387745C1 (fr)
WO (1) WO2007140737A1 (fr)

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Also Published As

Publication number Publication date
JP5026513B2 (ja) 2012-09-12
US7753084B2 (en) 2010-07-13
EP2027316B1 (fr) 2009-09-16
CN101460669A (zh) 2009-06-17
ATE443171T1 (de) 2009-10-15
RU2387745C1 (ru) 2010-04-27
US20090288732A1 (en) 2009-11-26
CN101460669B (zh) 2013-01-23
WO2007140737A1 (fr) 2007-12-13
JP2009538994A (ja) 2009-11-12
DE502007001555D1 (de) 2009-10-29
BRPI0712120A2 (pt) 2012-01-31
DE102006025968B3 (de) 2007-11-29

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