EP1046736A2 - Dispositif pneumatique de formation de lisière pour métiers à tisser - Google Patents

Dispositif pneumatique de formation de lisière pour métiers à tisser Download PDF

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Publication number
EP1046736A2
EP1046736A2 EP00106897A EP00106897A EP1046736A2 EP 1046736 A2 EP1046736 A2 EP 1046736A2 EP 00106897 A EP00106897 A EP 00106897A EP 00106897 A EP00106897 A EP 00106897A EP 1046736 A2 EP1046736 A2 EP 1046736A2
Authority
EP
European Patent Office
Prior art keywords
weft thread
outlet opening
nozzle
last layer
fluid
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.)
Withdrawn
Application number
EP00106897A
Other languages
German (de)
English (en)
Other versions
EP1046736A3 (fr
Inventor
Adnan Dr. Wahhoud
Hans-Dieter Dr. Scorl
Herbert Reinhardt
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 EP1046736A2 publication Critical patent/EP1046736A2/fr
Publication of EP1046736A3 publication Critical patent/EP1046736A3/fr
Withdrawn legal-status Critical Current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
    • D03D47/40—Forming selvedges
    • D03D47/48—Forming selvedges by inserting cut end of weft in next shed, e.g. by tucking, by blowing

Definitions

  • the invention relates to an improvement to a pneumatically operated last for Looms according to the features of the preamble of claim 1.
  • the object of the invention is to provide an improved pneumatically operated insert create, which enables the direction of that which can be traced back to a shed Pneumatic medium acting weft end individually and also in Dependence on technological-physical parameters of the weft.
  • the object is achieved by the characterizing features of claim 1.
  • the flow channel which is used to return the free weft end to form a so-called insert edge
  • a nozzle body that is adjustable about its longitudinal center axis is integrated with a nozzle having at least one fluid outlet opening, and thereby the fluid jet of the nozzle its direction of action is adjustable.
  • the fluid jet emerging from the nozzle of the nozzle body should have such an effect on the weft thread end to be returned, regardless of the weft thread type, that a high-quality insert edge is produced on the fabric.
  • the directionally adjustable nozzle body has at least one jet nozzle in the plane of the weft thread centering slot of the last layer, the outlet opening of which can be of any geometrically shaped shape.
  • the outlet opening can be a multi-hole opening, a slot opening or an opening with a conical outlet.
  • the optimum effective direction of the fluid jet on the weft thread end is set manually.
  • Another embodiment variant provides for the setting to be carried out in an electrically motor-controlled manner depending on the pattern. This has the advantage that, depending on the type of weft thread and its processing parameters, the optimum setting with regard to the jet direction and the nozzle outlet to be used can be carried out under program control.
  • the selvedge layer 1 contrary to the weaving direction of the weaving machine, not shown, has a converging weft inlet 2, at which approximately the intersection 3 of which the beginning of a weft centering slot 4 with a width "b" lies in the horizontal plane, see also Figure 2, connects.
  • the horizontal plane mentioned corresponds approximately to the weaving plane of a weaving machine.
  • the effective length of the centering slot 4 ends at an end limit 5 which is approximately half the width "b" and runs parallel to the direction of a weft thread 7 to be inserted.
  • the end limit 5 merges with the width "b" into the weft thread centering slot 4 which is guided on the insertion side up to the free end 4a of the last layer 1.
  • a flow channel 6 crosses the weft thread centering slot 4 near the end delimitation 5 running parallel to the weft insertion direction.
  • the flow channel 6 is supplied with a fluid, for example compressed air, via the fluid connection 6a, which directs the free end of a weft thread 7, which has been entered into a shed and attached to the stop edge 11a of a fabric 11 and tied, into the flow channel 6 and holds therein until it holds a nozzle 8a of a nozzle body 8 arranged after the end limit 5 in the plane of the weft thread centering slot 4 of the last layer 1 emits at least one fluid impulse 9 onto the free end of the weft thread 7 held in the flow channel 6 and returns or inserts the same into a trained shed, best of all can be seen in Figure 5.
  • a fluid for example compressed air
  • the direction of the fluid jet 9 emerging from the outlet opening 8b of the nozzle 8a is variable, in order to achieve an optimal effect of the fluid jet 9 on the end of the weft thread 7 to be inserted.
  • the nozzle body 8 carrying the nozzle 8a is accommodated for rotation about its longitudinal center axis 8c in a bore 10 which has an outlet 10a in the direction of the weft thread centering slot 4.
  • the bore 10 is a basic bore, the central axis of which runs at an angle to the central axis 6b of the flow channel 6 and has a transverse bore 10a which lies in the plane of the weft thread centering slot 4 and opens into the bore 10, the basic bore 10 being so deep in the
  • the groin layer 1 is inserted so that there is sufficient play to position the nozzle 8a of the nozzle body 8 in the insertion plane or in the plane of the weft thread centering slot 4.
  • a nozzle body in the groin layer 1 in such a way that its Longitudinal center axis parallel or angled to the direction of the weft insertion in the plane of the weft thread centering slot 4 and the at least one fluid outlet opening is fixed on the end face in the rotatably arranged nozzle body.
  • FIGs 3 and 4 show the integrated in the groin layer 1 according to Figures 1 and 2 Nozzle body 8 with a differently designed fluid outlet opening.
  • the nozzle body 8 is here as a closed, rotationally symmetrical body with an inner Fluid guide 8d formed, which opens into the at least one fluid outlet opening 8b.
  • FIG. 4 shows conceivable shapes of fluid outlet openings 8b in the wall of the nozzle body 8.
  • a first shape can be the circular shape; a second shape can be in the form of an ellipse or slot-shaped and a third shape can be in the form of a truncated cone. It is important that different cross-sectional openings can be incorporated in the periphery of the nozzle body wall, each nozzle 8a being assignable to a specific weft thread type or a group of weft thread types and the core of the fluid jet in question lying in the plane of the weft thread centering slot 4. It goes without saying that when a fluid outlet opening 8b or a group of fluid outlet openings 8b according to FIG. 1 is active, the remaining fluid outlet openings 8b are closed.
  • a connector 12 is provided with locking screw 13 with which artisan type the setting made or the nozzle body 8 e.g. about gear means in operative connection with an electric motor drive, which in Depending on a weft thread type to be processed or depending on one group of different weft threads to be processed according to one in the Loom control stored program is controlled.
  • FIG. 5 shows a simplified representation of the insertion of the free end of a weft thread 7 into a shed formed from warp threads 16.
  • the last layer 1 is positioned here between the right edge of a fabric 11 to be produced and a cutting device 14.
  • the weft thread 7 is inserted into the shed by a weft thread insertion device, not shown, struck against the edge 11a of the fabric 11 and bound into the fabric 11.
  • the weft thread 7 is severed on the extract side of the shed by means of the scissors 14 between an auxiliary fabric or catch strip 15 and the strip layer 1.
  • the end of the weft thread 7 is directed into the flow channel 6 by a pneumatic fluid flow and held therein until a targeted fluid jet 9 returns the weft thread section 7 a lying between the right edge of the fabric 11 and the flow channel 6 into a shed formed between the warp threads 16. The returned weft end is then knocked onto the edge 11a of the fabric 11 together with a subsequently inserted weft thread.
  • FIG. 6 shows the means 1, 8, 8a, 8b, 10 shown in FIG. 1 in connection with a electromotive drive for gradual adjustment of an optimally acting fluid jet 9 on the end 7a of a weft thread 7 to be inserted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP00106897A 1999-04-21 2000-03-31 Dispositif pneumatique de formation de lisière pour métiers à tisser Withdrawn EP1046736A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999117953 DE19917953C1 (de) 1999-04-21 1999-04-21 Pneumatisch betriebener Leistenleger für Webmaschinen
DE19917953 1999-04-21

Publications (2)

Publication Number Publication Date
EP1046736A2 true EP1046736A2 (fr) 2000-10-25
EP1046736A3 EP1046736A3 (fr) 2001-05-30

Family

ID=7905270

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00106897A Withdrawn EP1046736A3 (fr) 1999-04-21 2000-03-31 Dispositif pneumatique de formation de lisière pour métiers à tisser

Country Status (3)

Country Link
EP (1) EP1046736A3 (fr)
JP (1) JP2000314051A (fr)
DE (1) DE19917953C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001086047A1 (fr) * 2000-05-08 2001-11-15 Picanol N.V. Dispositif de rentrage de bouts d'un metier a tisser
EP1179624A1 (fr) * 2000-08-10 2002-02-13 Tsudakoma Kogyo Kabushiki Kaisha Dispositif de rentrage des fils de trame

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4957144A (en) * 1987-12-28 1990-09-18 Nissan Motor Co., Ltd. Tack-in system of shuttleless loom
DE19548846C1 (de) * 1995-12-27 1996-10-10 Dornier Gmbh Lindauer Verfahren und Vorrichtung zum Einlegen eines Schußfadens

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0291744A3 (fr) * 1987-05-19 1991-08-07 Zvs Vyzkumnevyvojovy Ustav Koncernova Ucelova Organizace Dispositif pour la formation de lisières du type à fil rentré dans les métiers à tisser
DE3940279A1 (de) * 1989-12-06 1991-06-13 Kloecker Entwicklungs Gmbh Verfahren zum bilden einer einlegekante
IT1251849B (it) * 1991-09-23 1995-05-26 Somet Soc Mec Tessile Metodo per la formazione della cimossa rientrata in telai senza navetta ed in particolare in telai ad aria e dispositivo per realizzare tale metodo
DE4424271C1 (de) * 1994-07-09 1995-06-29 Dornier Gmbh Lindauer Luftwebmaschinen mit Kantenniederhalter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4957144A (en) * 1987-12-28 1990-09-18 Nissan Motor Co., Ltd. Tack-in system of shuttleless loom
DE19548846C1 (de) * 1995-12-27 1996-10-10 Dornier Gmbh Lindauer Verfahren und Vorrichtung zum Einlegen eines Schußfadens

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001086047A1 (fr) * 2000-05-08 2001-11-15 Picanol N.V. Dispositif de rentrage de bouts d'un metier a tisser
BE1013428A3 (nl) * 2000-05-08 2002-01-15 Picanol Nv Kanteninleginrichting voor weefmachines.
US6837279B2 (en) * 2000-05-08 2005-01-04 Picanol N.V. Selvage former for a weaving machine
EP1179624A1 (fr) * 2000-08-10 2002-02-13 Tsudakoma Kogyo Kabushiki Kaisha Dispositif de rentrage des fils de trame

Also Published As

Publication number Publication date
EP1046736A3 (fr) 2001-05-30
DE19917953C1 (de) 2001-01-25
JP2000314051A (ja) 2000-11-14

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