EP2135983B1 - Procédé et dispositif de fabrication d'un tapis à poils avec des hauteurs de poils variables - Google Patents

Procédé et dispositif de fabrication d'un tapis à poils avec des hauteurs de poils variables Download PDF

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Publication number
EP2135983B1
EP2135983B1 EP09160527.9A EP09160527A EP2135983B1 EP 2135983 B1 EP2135983 B1 EP 2135983B1 EP 09160527 A EP09160527 A EP 09160527A EP 2135983 B1 EP2135983 B1 EP 2135983B1
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Prior art keywords
cutting
double
height
weaving machine
face
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EP09160527.9A
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German (de)
English (en)
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EP2135983A1 (fr
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Johny Debaes
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D39/00—Pile-fabric looms
    • D03D39/16—Double-plush looms, i.e. for weaving two pile fabrics face-to-face
    • D03D39/18—Separating the two plush layers, e.g. by cutting

Definitions

  • This invention relates on the one hand to a double-face weaving machine comprising a cutting device provided for cutting through a double-face fabric moving back and forth over the width of the weaving machine, said cutting device comprising one or more cutting knives provided for cutting through the double-face fabric at least at a first and/or at a second cutting height.
  • this invention relates to a method for weaving pile fabrics with at least two different pile heights on such a double-face weaving machine.
  • the European patent publication EP 1 347 087 describes a method and a device for producing fabrics having a wide variety of structures using the double-face weaving technique. Practically unlimited combinations of cut pile with loops and with pattern-forming pile warps that float over one or more wefts before being bound ("flat weave") can be produced. Another method is described in the British patent publication GB 346 107 .
  • the method described allows pile of different heights to be woven into a fabric by double-face weaving by allowing pile yarns for the longer pile to float over a number of wefts on the pile side and then to bind them over a weft on the pile side before moving to the other ground fabric so that after cutting through the pile this latter pile can be released from this weft with a limited force by means of a scraping operation on the carpet so that a longer pile yarn is produced than is the case with the normal pile fabric production.
  • the same technique can be employed to produce high pile with a limited density. Furthermore, an additional scraping operation is necessary.
  • the American patent publication US 3 406 725 in turn describes how on a double-face weaving machine the pile height can be varied from cycle to cycle by allowing the cutting knife to operate at a different height so that height differences in the pile occur on both fabrics of the double-face fabric that are complementary: where in the lower fabric a row with short pile is produced, a pile row with longer pile is produced in the upper fabric.
  • either different cutting knives can be installed in the cutting area, the height of the cutting knife guide can be moved or the upper and/or lower ruler can be moved relative to the cutting knife.
  • the solutions with movement of upper or lower ruler or cutting knife guide should be avoided in order to carry out these movements at high operating speeds.
  • the movement of the cutting knife in its holder or the changing between cutting knives at different working heights is a more practicable solution.
  • Cutting knives at different heights represent a problem for the regrinding.
  • One of the advantages of double-face weaving is specifically that the cutting knife is ground after every cutting movement by moving it along a grinding device on its run-out stroke.
  • US 3 406 725 offers no solution for efficiently regrinding the cutting knives that cut through the double-face fabric at varying heights in each movement cycle of the cutting knife.
  • the object of this invention is therefore to create a method and device that allows one or more cutting knives to be employed on a double-face weaving machine on which fabrics are produced with cut pile with different pile heights, and that these cutting knives can be reground during the weaving process.
  • the object of the invention is achieved by providing on a double-face weaving machine comprising a cutting device provided for cutting through a double-face fabric moving back and forth over the width of the weaving machine, said cutting device comprising one or more cutting knives provided for cutting through the double-face fabric at least at a first and at a second cutting height, said weaving machine comprising at least two grinding devices for a cutting knife, said grinding devices each being at different working heights to grind the cutting knife.
  • This type of weaving machine has the advantage that both the cutting knife provided for cutting through the double-face fabric at a first cutting height and the cutting knife provided for cutting through the double-face fabric at a second cutting height can be reground during the weaving process.
  • working height of the grinding device is used to refer to the position of the grinding device in which the grinding device is able to grind a cutting knife that cuts at a given cutting height.
  • the inventive double-face weaving machine comprises in a first preferred embodiment three grinding devices of which at least two grinding devices are each at a different working height.
  • the inventive double-face weaving machine comprises four grinding devices of which at least two grinding devices are each at a different working height.
  • the four grinding devices are each at a different working height.
  • At least two grinding devices are provided on opposite sides of the weaving machine.
  • the cutting device is controlled by a path-controlled actuator for execution of its back and forth movement.
  • This type of actuator serves to define the different movement paths of the cutting device, depending on the height of the active cutting knife and the location of the grinding device with the corresponding working height.
  • a path-controlled actuator offers the possibility of defining at each cutting cycle the path to be travelled from the current position on the basis of the height of the active cutting knife and the adjustment of the different grinding devices.
  • Defining the path to be travelled means at least the end point of this path, but the definition of the path generally also includes information on the time when intermediate positions have to be reached and/or the speed and/or the acceleration with which the movement to each of these positions has to be performed.
  • the cutting device comprises a cutting head with a rotatable part, said part having a first cutting knife for cutting through the double-face fabric at a first cutting height and a second cutting knife for cutting through the double-face fabric at a second cutting height and said part being provided to move a cutting knife by rotation into a position in which it cuts through the double-face fabric. Switching over from the one cutting height to the other cutting height is effected by a rotational movement of a part of the knife holder.
  • the cutting device comprises a height-adjustable cutting knife.
  • Another subject of this invention relates to a method for weaving of pile fabrics with at least two different pile heights on a double-face weaving machine in which in consecutive insertion cycles weft yarns are inserted between ground warp yarns and pile-warp yarns so that two ground fabrics are woven above one another, with the weaving machine also having a cutting device comprising one or more cutting knives moving back and forth over the width of the weaving machine provided for cutting through the formed double-face fabric at least at a first and at a second cutting height, and in which the cutting knife for cutting through at a first cutting height is ground on a first grinding device and the cutting knife for cutting through at a second cutting height is ground on a second grinding device, said grinding devices each being at a different working height.
  • the cutting height can be changed at least at one position between the fabric and one of the grinding devices during a weaving cycle.
  • the cutting device (1) of a double-face weaving machine consists of a knife carriage or cutting carriage with one or more cutting knives mounted on the carriage in which the knife carriage or cutting carriage moves back and forth over a guide in weft direction on a cutting bench on the double-face weaving machine and a drive to drive the movement of the knife carriage or cutting carriage.
  • the cutting device (1) has one or more cutting knives (2,3) provided for cutting through the double-face fabric at least at a first and/or a second cutting height.
  • the cutting through at a first or a second cutting height can be performed with a cutting knife (2,3) that is adjustable in height or by changing between cutting knives that cut at either a first cutting height or at a second cutting height in the cutting area.
  • Figure 5 is a representation of a knife holder (6) having a first (2) and a second (3) cutting knife provided for cutting through a double-face fabric at a first and a second cutting height respectively. The switching over from the one cutting height to the other cutting height is effected by a rotational movement of a part of the knife holder (6).
  • the weaving machine has at least two grinding devices (4,5) for a cutting knife, said grinding devices (4,5) each being at a different working height in order to grind the cutting knife (2,3).
  • the grinding devices (4,5) are installed as shown in Figures 1 and 2 at the height of the run-out sides of the cutting movement.
  • the cutting movement is performed by the cutting device (1), the run-out sides are regarded as the part of the cutting movement over which the cutting knife travels from the position where it leaves this fabric at one of the sides of the formed double-face fabric (7) until the end of the travel.
  • Grinding can be carried out on the one hand by controlling the carrier of the cutting knife in such a way that it passes along the grinding device (4,5) only on the run-out side where the grinding device (4,5) is positioned at the appropriate working height defined by the active cutting knife and by limiting its movement on the run-out side where the grinding device (4,5) is not positioned at the appropriate working height defined by the active cutting knife until in front of the grinding device (4,5), or on the other hand by controlling the height adjustment of the cutting knife in such a way that the active cutting knife on its passage past one of the grinding devices (4,5) is adjusted to the correct height, or by a combination of the two methods.
  • FIG. 1 the movement path (A) is illustrated for the knife carriage with the cutting knife (3) adjusted for cutting through a double-face fabric at the second cutting height.
  • This movement path (A) starts on the right between the fabric (7) and a first grinding device (4) for grinding the cutting knife (2) for cutting through the double-face fabric at the first cutting height and extends over a second grinding device (5) provided for grinding the cutting knife (3) for cutting through the double-face fabric at the second cutting height.
  • the cutting knife (3) has cut through the double-face fabric at the second (highest) cutting height and the corresponding second cutting knife (3) has been reground at this cutting height.
  • Figure 2 shows the movement path (B) for the measuring carriage with the cutting knife (2) adjusted for cutting through a double-face fabric at the first cutting height.
  • This movement path (B) starts on the left between the fabric (7) and the second grinding device (5) for grinding the cutting knife (3) for cutting through the double-face fabric at the second cutting height and extends over the first grinding device (4).
  • the cutting knife (2) has cut through the double-face fabric at the first (lowest) cutting height and the corresponding first cutting knife (2) has been reground at this cutting height.
  • the movement of the cutting knife within a weaving cycle can thus comprise a combination of movements from the following series:
  • the invention covers all the methods:
  • Typical consecutive weaving cycles according to the invention are:
  • a pile row is cut alternately at a first cutting height and a pile row at a second cutting height.
  • the change in the cutting height of the cutting knife can hereby take place just before the movements 3 or just after the movements 3; the cutting height of the active cutting knife during the movements 1, 2 , 4 or 5 must hereby naturally correspond to the height at which the grinding device which the cutting device is to pass is set.
  • the sequence of movements 1 - 2 - 3 - 4 - 5 - 3' - 1 - 2 - 3 - 4- 5 - 3' appears to be universally applicable in each weaving cycle if the height of the cutting knife can be changed, then a fixed coupling of movements with the main axis can also be employed in place of a path-controlled actuator e.g. by means of a cam-controlled coupling but then in combination with a freely selectable control for changing the height of the cutting knife.
  • Freely selectable is understood here as meaning that at a limited number of positions of the cutting knife, a change in cutting height can be carried out or not.
  • an independently controllable actuator can equally be employed here that performs a change in height of the cutting knife synchronously in time, synchronously in angle with the main shaft or synchronously in position with the cutting knife.
  • the path-controlled actuator for driving the cutting knife is preferably a servo motor.
  • Such motors have a position feedback system that allows the preset movement path to be maintained with a preset accuracy.
  • the path-controlled actuator is coupled to the cutting knife carrier.
  • Preferred embodiments of such couplings are known from prior art, such as drive drums rotating back and forth which drive a rope or toothed belt that is connected at both ends to the cutting knife carrier, recirculating ball screws that are connected to the cutting knife carrier, or the path-controlled actuator can be a linear motor of which one or more elements are connected to or form part of the cutting knife carrier.
  • the grinding device can be equipped with an electromechanical, pneumatic, magnetic or hydraulic device for adjustment of the height so that when an active cutting knife arrives at a certain working height, one of the grinding devices on one side of the weaving machine can be adjusted to the correct height.
  • a preferred method also consists in also defining the movement path for the cutting knife carrier and/or the height adjustment of the grinding devices as a function of the pattern to be woven when creating the program for the control of the shed formation (dobby or jacquard) for each weft insertion. This information allows the controller of the weaving machine to control the drive motor for the cutting movement in the desired manner and also the drive for the height adjustment of the grinding devices, if installed.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Looms (AREA)

Claims (10)

  1. Machine à tisser double pièce comprenant un dispositif de coupe (1) prévu pour couper à travers un tissu double pièce qui se déplace en mouvement de va-et-vient sur la largeur de la machine à tisser, le dispositif de coupe comprenant un ou plusieurs couteaux de coupe (2, 3) fournis pour couper à travers le tissu double pièce au moins à une première et à une seconde hauteur de coupe, caractérisée en ce que la machine à tisser comprend au moins deux dispositifs de meulage (4, 5) pour un couteau de coupe, lesdits dispositifs de meulage (4, 5) étant chacun à des hauteurs de travail différentes pour meuler le couteau de coupe.
  2. Machine à tisser double pièce selon la revendication 1, caractérisée en ce que la machine à tisser comprend trois dispositifs de meulage dont au moins deux dispositifs de meulage sont chacun à une hauteur de travail différente.
  3. Machine à tisser double pièce selon la revendication 1, caractérisée en ce que la machine à tisser comprend quatre dispositifs de meulage dont au moins deux dispositifs de meulage sont chacun à une hauteur de travail différente.
  4. Machine à tisser double pièce selon la revendication 3, caractérisée en ce que les quatre dispositifs de meulage sont chacun à une hauteur de travail différente.
  5. Machine à tisser double pièce selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins deux dispositifs de meulage sont prévus sur les côtés opposés de la machine à tisser.
  6. Machine à tisser double pièce selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif de coupe (1) est commandé par un actionneur de trajectoire contrôlée pour exécuter son mouvement de va-et-vient.
  7. Machine à tisser double pièce selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif de coupe (1) comprend une tête de coupe (6) avec une partie rotative (8), ladite partie (8) ayant un premier couteau de coupe (2) pour couper à travers le tissu double pièce à une première hauteur de coupe et un second couteau de coupe (3) pour couper à travers le tissu double pièce à une seconde hauteur de coupe et ladite partie (8) étant fournie pour déplacer un couteau de coupe (2, 3) par rotation dans une position dans laquelle il coupe à travers le tissu double pièce.
  8. Machine à tisser double pièce selon l'une quelconque des revendications 1 à 6, caractérisée en ce que le dispositif de coupe (1) comprend un couteau de coupe ajustable en hauteur.
  9. Procédé de tissage de tissus à poils avec au moins deux hauteurs de poil différentes sur une machine à tisser double pièce, dans lequel, dans des cycles d'insertion consécutifs, des fils de trame sont insérés entre des fils de chaîne de fond et des fils de chaîne de poil de sorte que deux tissus de fond soient tissés l'un au-dessus de l'autre, la machine à tisser comportant également un dispositif de coupe (1) comprenant un ou plusieurs couteaux de coupe (2, 3) se déplaçant en mouvement de va-et-vient sur la largeur de la machine à tisser fournis pour couper à travers le tissu double pièce formé au moins à une première et à une seconde hauteur de coupe, caractérisé en ce que le couteau de coupe (2) pour couper à travers à une première hauteur de coupe est meulé sur un premier dispositif de meulage (4) et le couteau de coupe (3) pour couper à travers à une seconde hauteur de coupe est meulé sur un second dispositif de meulage (5), lesdits dispositifs de meulage (4, 5) se trouvant chacun à une hauteur de travail différente.
  10. Procédé selon la revendication 9, caractérisé en ce que la hauteur de coupe peut être modifiée au moins dans une position entre le tissu et l'un des dispositifs de meulage au cours d'un cycle de tissage.
EP09160527.9A 2008-05-22 2009-05-18 Procédé et dispositif de fabrication d'un tapis à poils avec des hauteurs de poils variables Active EP2135983B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE2008/0287A BE1018157A3 (nl) 2008-05-22 2008-05-22 Wekwijze en inrichting voor het vervaardigen van weefsels met gesneden pool met variabele poolhoogte.

Publications (2)

Publication Number Publication Date
EP2135983A1 EP2135983A1 (fr) 2009-12-23
EP2135983B1 true EP2135983B1 (fr) 2015-07-08

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EP09160527.9A Active EP2135983B1 (fr) 2008-05-22 2009-05-18 Procédé et dispositif de fabrication d'un tapis à poils avec des hauteurs de poils variables

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EP (1) EP2135983B1 (fr)
BE (1) BE1018157A3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101138812B1 (ko) 2009-11-03 2012-05-10 주식회사 영도벨벳 직물 절단장치
BE1019155A3 (nl) 2010-01-15 2012-04-03 Wiele Michel Van De Nv Werkwijze en inrichting voor het vervaardigen van weefsels met minstens twee verschillende poolhoogtes in een zelfde poolrij.
CN112981672B (zh) * 2021-01-24 2022-03-25 常州市锦铄源纺织机械有限公司 一种机上割绒装置
CN115198427B (zh) * 2022-09-13 2023-01-06 苏州力致高性能纤维预制体产业研究院有限公司 一种机上花式割绒装置、割绒方法及三维特种织机

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1127341A (en) * 1966-01-18 1968-09-18 G H Norton & Company Ltd Improvements in or relating to woven pile products and the weaving thereof
EP1394301B1 (fr) * 2002-08-24 2006-06-07 SCHÖNHERR Textilmaschinenbau GmbH Dispositif d'entraînement pour le chariot porte-lame d'un métier à tisser double peluche

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BE1018157A3 (nl) 2010-06-01
EP2135983A1 (fr) 2009-12-23

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