Classifications

• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
  • D03J1/00—Auxiliary apparatus combined with or associated with looms
  • D03J1/16—Apparatus for joining warp ends
  • D03J1/18—Apparatus for joining warp ends for joining, e.g. tying, a complete series of fresh warp threads to the used warp threads
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
  • D03J1/00—Auxiliary apparatus combined with or associated with looms
  • D03J1/02—Auxiliary apparatus combined with or associated with looms for treating warp, e.g. cleaning, moistening

Definitions

• the present invention relates to a method for fixing the ends of a thread layer wound in an orderly manner on a tree, in which the threads are aligned, tensioned and fixed at their free ends.
• Such processes are used in textile companies in various stages of the production process, for example in warping, warping or sizing, when pulling in or tying up, or in weaving.
• the fixation is usually carried out with a rail or with a comb, which always requires a not inconsiderable effort to produce the fixation.
• the rails or combs used for fixation are generally relatively heavy and unwieldy, so that they are often omitted and the thread ends are fixed by linking or tying, which, however, complicates handling in the next processing step .
• the invention is now intended to provide a method of the type mentioned at the outset which is simple, universal and is quickly applicable and ensures optimal maintenance of the existing order of the thread layer.
• this object is achieved in that the fixing takes place by welding the threads with a film.
• the warp threads are glued to a piece of fabric in the weaving machine with the aid of foils made of synthetic resin , wherein the films mentioned serve as an adhesive between the fabric and the warp threads and a fabric tape covering their top, so that there is a multi-layer structure.
• the preparation time for weaving on the weaving machine itself is significantly less than five, for example three minutes, because the welded lot has such small dimensions that it can be threaded easily into the sand tree. Threading in the sand tree is supported by the rigidity of the film. This means that the film is much easier to handle than a strip of fabric.
• a further advantage over a strip of fabric is the elasticity of the film which enables compensation of the thread tension, which means that fabric of perfect quality is produced as early as 10-20 cm after the welding point.
• the invention further relates to a device for carrying out said method, with means for tensioning and with means for fixing the threads.
• the device according to the invention is characterized in that the latter means have two parallel welding bars which are adjustable relative to each other between a rest and a working position and which in their rest position have a gap for the passage of the threads and for the take-up form the film.
• FIG. 2 shows a detail of the device of Fig. 1; and
• FIG. 3 shows a front view of a variant of the device from FIG
• the invention is not limited to this application, but can be used in the entire weaving mill wherever a tree with an orderly wound on it Thread layer, that is, a front boom, a slip tree, a warping roller or a warp beam.
• Thread layer that is, a front boom, a slip tree, a warping roller or a warp beam.
• the following description describes all the essential method steps and a specific device for welding a warp with a film; on the basis of this description it will be easy for the person skilled in the art to transfer the device described to the requirements of other applications and to adapt it to them.
• the warp welding device is mounted on a mobile frame 1 and essentially consists of a frame 2 with a fixed lower welding bar 3 and one in frame 2 in the direction of the arrow A stroke-adjustable upper welding bar 4, a brush tree 5 connected to the frame 2, a feed control device 6 with an operating console connected to it (not shown), a roller 7 with welding foil 8 and from a drive symbolized by two cylinders 9 for the upper welding bar 4. Both the two welding bars 3 and 4 and the drive 9 are connected to the feed / control unit 6.
• the frame 1 preferably consists of parts of the knotting frame used for the knitting machine ÜSTER TOPMATIC (USTER - registered trademark of Zellweger Uster AG), likewise the brush tree 5 is known from this knotting frame and also from the drawing-in machine USTER DELTA.
• the height of the frame 2 is adjustable and is chosen so that the lower welding bar 3 is slightly below the level of the thread ends hanging from the reed carried by the crockery trolley or pull-in trolley. As a result, the welding device can be moved directly to the thread ends after it has been drawn in. With reference to FIG. 1, the dishes with the warp threads drawn in would therefore be to the right behind the frame 1.
• the welding foil 8 rolled up on the roll 7 and adapted in width to the warp thread layer to be processed is placed over the lower welding drawn bar 3, with a suitable cutting device, such as is known for example for household films, cut off in a width of a few, preferably about 4 cm and fixed at the ends of the lower welding bar 3 with quick releases.
• a suitable cutting device such as is known for example for household films
• the warp threads of the drawn-in chain are drawn, for example with a thread clip, between the two welding bars 3 and 4 and placed over the brush tree 5.
• the warp threads are evenly tensioned by a rotary movement of the latter in the counterclockwise direction caused by a lever 10.
• the brush tree 5 is lowered so far while maintaining the warp thread tension that the warp threads rest with certainty on the strip of welding foil 8 fixed to the lower welding beam 3.
• a piece with a greater length of, for example, 0.8 to 1.2 meters is cut from the welding foil 8, placed on the warp thread layer and likewise fastened to the lower welding beam 3 with quick-release devices.
• the welding film is then attached to the welding bar 3 in the region of its rear transverse edge and hangs down over the brush tree 5 at the front of the frame 1.
• This relatively long film part serves to facilitate threading into the goods winding of the weaving machine by acting as a running-in part during threading and being drawn in by the sand tree.
• the welding film 8 is made of polyethylene and has a maximum thickness of 0.35 mm; it melts during the welding operation and flows around the individual warp threads. Practical tests have shown that this is the case under all conditions, even with very dense chains and even with two fabric layers.
• the welding operation can take place.
• the upper welding bar 4 the distance from the lower welding bar 3 in the rest position about 20 cm or more, moved by its drive 9 downwards and hydrogenated in a defined 'position relative to the lower welding bar 3 placed in which he presses against it.
• the adjustment path of the upper welding bar 4 is determined by proximity switches (not shown) arranged on the frame 2.
• the lower welding bar 3 is resiliently mounted so that there is a defined pressure between the two welding bars in the defined mutual position.
• the two welding bars 3 and 4 are heated for a certain time to a certain temperature of about 80 ° -100 ° C., the intensity of the welding being determined by the duration of this heating. In practice it has been shown that this duration lasts a maximum of about 12 to 15 seconds. wearing. This time can be set on the control panel. When it has expired, the upper welding bar 4 remains in its working position for a few seconds during the cooling phase and is then moved again, preferably automatically, to its rest position.
• the end of the warp thread layer welded with the foils 8 is released and the drawn-in warp with its warp threads clamped relative to the reed can be transported to the weaving machine or to an intermediate store.
• the film section acting as an inlet part needs to be threaded in the sand tree. This operation is significantly less than 5 minutes and usually not more than 3 minutes and is therefore only a fraction of the 20 minutes required for the usual manual tying of the warp threads knotted together in bundles to a remnant of fabric.
• each welding bar consists of a carrier 12 with a support layer 13 for a resistance wire 14 and one against the resistance wire 14 Covering film 15 covering the outside Between the two welding bars 3 and 4, the two polyethylene films 8 and the warp thread layer KF lying between the films and to be welded to them can be seen.
• the support layer 13 consists of glass fiber-reinforced plastic, preferably made of polytetrafluoroethylene, and the cover film 15, which serves to prevent the film 8 from sticking to the resistance wire 14, likewise consists of the polytetrafluoroethylene mentioned.
• the resistance wire 14 which consists, for example, of a tungsten alloy, is stretched in the longitudinal direction and projects over the support layer 13 at its ends, as a result of which the foils 8 are not weakened in the region of their edge portions which project over the width of the warp thread layer during welding. The latter is important in order to prevent the foils 8 from tearing laterally when drawn into the weaving machine.
• the resistance wire 14 is subjected to a corresponding tensile force which is generated, for example, by levers under spring force.
• Variants of the described method can consist in fixing the warp threads not by welding with a film but by clamping, in that the warp thread layer is clamped with flat profiled rails, with several on the profiled rails or on one of them across the width of the warp layer Threading into the weaving machine, the conveyor belts are attached.
• These conveyor belts are designed in the manner of a belt and have at their free end a section with increased rigidity that makes threading easier.
• the main difference is a vertically arranged roll 16 on which a narrow and a wide film strip 17 and 17 'are wound. Between the roller 16 and the frame 2 there is a fixed film clamping rail 18 for the two films 17 and 17 'and a film separating knife 19, and a displaceable film clamping rail 20 is arranged on the upper crossbar of the frame 2.
• the narrow film strip 17 ' which is a few centimeters wide, is placed on the lower welding bar 3 (FIG. 1) and the wide film strip 17, which is approximately 0.8 to 1.2 meters wide, comes on top of the warp thread layer and is intended as an inlet part for weaving.
• the displaceable clamping rail 20 is set such that the distance between it and the film separating knife 19 corresponds exactly to the film length required for the respective warp width.
• the two foils 17 and 17 ' are each pulled from the roll 16 to the clamping rail 20, then clamped by this and the fixed clamping rail 18 and finally cut off with the separating knife 1.
• the upper welding bar 4 is driven, as shown, via a single motor-driven spindle 9 ', the upper welding bar 4 being connected to the upper transverse bar of the frame 2 via scissor joints.
• the control panel 6 1 On the right side of the frame 1 in the figure, the control panel 6 1 not shown in FIG. 1 is shown.
• the device described is extremely flexible and versatile due to its displaceability and height adjustability and the possibility of adapting the length of the foils precisely to the respective warp width. There are no problems with this device to approach any textile machine, such as drawing-in machines, sizing machines or also weaving machines, and to carry out the operations described there.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Looms (AREA)
• Treatment Of Fiber Materials (AREA)
• Woven Fabrics (AREA)
• Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4196244

Family Applications (1)

Country Status (9)

Cited By (2)

Families Citing this family (3)

Citations (5)

Family Cites Families (3)

• 1992
  • 1992-03-16 CH CH00832/92A patent/CH686961A5/de not_active IP Right Cessation
• 1993
  • 1993-03-10 ES ES93903791T patent/ES2091597T3/es not_active Expired - Lifetime
  • 1993-03-10 US US08/146,162 patent/US5514234A/en not_active Expired - Fee Related
  • 1993-03-10 WO PCT/CH1993/000063 patent/WO1993019233A1/de active IP Right Grant
  • 1993-03-10 JP JP5516139A patent/JPH06507947A/ja active Pending
  • 1993-03-10 DE DE59303558T patent/DE59303558D1/de not_active Expired - Fee Related
  • 1993-03-10 EP EP93903791A patent/EP0584309B1/de not_active Expired - Lifetime
  • 1993-03-10 CZ CZ932420A patent/CZ282598B6/cs not_active IP Right Cessation
  • 1993-03-15 TW TW082101895A patent/TW228503B/zh active

Patent Citations (5)

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