EP0343498A1 - Machine for cutting tape from a tubular fabric - Google Patents

Machine for cutting tape from a tubular fabric Download PDF

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Publication number
EP0343498A1
EP0343498A1 EP89108876A EP89108876A EP0343498A1 EP 0343498 A1 EP0343498 A1 EP 0343498A1 EP 89108876 A EP89108876 A EP 89108876A EP 89108876 A EP89108876 A EP 89108876A EP 0343498 A1 EP0343498 A1 EP 0343498A1
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EP
European Patent Office
Prior art keywords
scanning device
textile material
cylinders
cutting
stroke
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
EP89108876A
Other languages
German (de)
French (fr)
Other versions
EP0343498B1 (en
Inventor
Ferdinand Gabathuler
Erik Gunnar Nilsson
Nikola Krmpotic
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.)
Swegea Maschinen AG
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Swegea Maschinen AG
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Publication date
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Publication of EP0343498A1 publication Critical patent/EP0343498A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2628—Means for adjusting the position of the cutting member
    • B26D7/2635—Means for adjusting the position of the cutting member for circular cutters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B26D3/162—Cutting rods or tubes transversely cutting tubes obliquely
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials
    • D06H7/10—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials obliquely
    • D06H7/12—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials obliquely cutting a tubular fabric helically
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S83/00—Cutting
    • Y10S83/929—Particular nature of work or product
    • Y10S83/935—Endless band
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/11—Bias [i.e., helically] cutting of tubular stock
    • Y10T29/1131—Bias [i.e., helically] cutting of tubular stock with means to feed stock along support or mandrel
    • Y10T29/1156—Rotatably
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/11—Bias [i.e., helically] cutting of tubular stock
    • Y10T29/1163—Bias [i.e., helically] cutting of tubular stock with means to rotate and store stock supply
    • Y10T29/1169—Axis of rotation parallel to support or mandrel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/141—With means to monitor and control operation [e.g., self-regulating means]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/323—With means to stretch work temporarily
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/768—Rotatable disc tool pair or tool and carrier
    • Y10T83/7809—Tool pair comprises rotatable tools
    • Y10T83/783—Tool pair comprises contacting overlapped discs

Definitions

  • the present invention relates to a tape cutting machine with a motor-driven rotary table for receiving a supply of a tubular textile material to be cut, with a first scanning device which serves to scan the rotational position of a section of the textile material which has been drawn from the supply and has not yet been opened up relative to the rotary table, with a plurality of motor-driven ones rotating conveyor cylinders, each having a number of axially oscillating jacket sections with adjustable stroke, with at least a second scanning device, which is used to scan the position of an edge section of the tubular textile material spanned by the conveyor cylinders, and with a cutting device with rotating cutting tools, by means of which the Textile fabric is cut into at least one band.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, solves the problem of creating a tape cutting machine which takes into account the above-mentioned peculiarities of the material to be processed even better than before and produce tapes with increased uniformity of their edges and more precise compliance with the bandwidth of an entire tape leaves.
  • the tape cutting machine has a turntable 1. On this turntable, the tubular test cloth to be cut is in a stock state, e.g. stored in a rolled or folded position. This turntable is driven by the motor 11.
  • a bracket 8 is mounted in a carrier 16 which is firmly connected to the turntable 1. This bracket can be rotated to a limited extent in a plane perpendicular to the plane of the drawing sheet.
  • a sensor 9 is present on or in the carrier 16. This sensor is used to scan the rotational position of the bracket 8 relative to the rotary table 1. In particular, the sensor 9 should respond when the rotary position of the bracket 8 relative to the rotary table 1 exceeds a certain value, that is to say the angle.
  • Such sensors are generally available in a wide variety of designs. There may be an electromechanical, purely electrical or optically working sensor.
  • the measured value determined by the sensor 9 of the scanning device 2 is fed to a control device 10.
  • the feed cylinders 3 are driven by the drive motor 12 via a belt drive 17.
  • the control device 10 is connected via the control line 18 to the motor 11 of the turntable 1 and via the control line 19 to the motor 12 of the feed cylinder 3.
  • the turntable 1 rotates in operation in the same direction as the feed cylinders 3.
  • the conveying cylinders 3 should actually rotate synchronously with the turntable 1, in particular with respect to their peripheral speed, a condition which, however, is not always achievable due to the slippage between the textile material and the conveying cylinders resulting from the reasons mentioned earlier.
  • the textile material lying on the turntable 1 is threaded through the bracket 8 and then stretched around the delivery cylinder 3. If the speed of the turntable 1 does not match the speed of the material stretched around the feed cylinder 3, this begins to twist, so that the bracket 8 leads or runs relative to the turntable 1.
  • the resulting change in angle is determined by the sensor 9 and the corresponding control signals are fed via the scanning device 2 to the controller 10, which regulates the ratio of the peripheral speed of the delivery cylinder 3 / speed of the rotary table 1 in such a way that the torsion is eliminated.
  • the speed of the motor 12 of the feed cylinders is changed.
  • the tape cutting machine is further equipped with at least one scanning device 6, which scans the position of the upper edge of the textile material to be cut.
  • the scanning element itself, a wide variety of designs that are generally available commercially are conceivable.
  • This adjusting device 15 controls the stroke of the jacket sections 4, 5.
  • the control of the movement of the jacket sections 4, 5 is the same as that of the publication already mentioned.
  • the stroke can also be controlled in accordance with the aforementioned embodiment, with the adjustment device 15 obviously being made from one Stepper motor or other drives available on the market.
  • the strokes of all jacket sections 4, 5 of all delivery cylinders 3 can be adjusted or, alternatively, only selected delivery cylinders 3.
  • jacket sections 4 , 5 to adjust only some of the feed cylinders 3.
  • a scanning device 3 can be present between each of the two delivery cylinders, which, viewed in the direction of travel of the material, can act on the subsequent and / or preceding delivery cylinder.
  • FIG. 2 An embodiment of the cutting device 7 is shown in FIG. 2, which enables a particularly simple adjustment for selecting different bandwidths.
  • the cutting device 7 has two knife shafts 20, 21 driven in opposite directions, the drive of which takes place in a known manner.
  • On one knife shaft, here the knife shaft 20, three knives 13, 13 ', 13' are arranged as an arrangement, for example.
  • Each of these knives 13, 13 ', 13 ⁇ is provided with a locking device 22, by means of which the respective measurement ser in the desired axial position along the cutter shaft 20 can be rotatably connected to the same.
  • a simple hub with a clamping screw is drawn here as an example.
  • the counter knives 14, 14 ', 14' which complement each other in pairs to the above-mentioned knives of the knife shaft 20 are now supported.
  • the counter knives 14, 14 ', 14' on the knife shaft 21 are only non-rotatable , but freely axially displaceable.
  • a tongue and groove arrangement can be present.
  • the knives 14, 14 ', 14 ⁇ only because of their own weight on the knives 13, 13', 13 ⁇ ; it has surprisingly been found that the existing contact force tends to achieve a perfect cut.
  • the cutters 14, 14 ', 14 In order to ensure a sufficient contact force, in particular at higher speeds of the cutter shafts 20, 21, in the embodiment shown, the cutters 14, 14 ', 14 manufacturedrüstet are equipped with somewhat oversized hubs 23 which apply the weight required to achieve a perfect cut.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Nonmetal Cutting Devices (AREA)

Abstract

Durch den über den Drehtisch (1) angeordneten Bügel (8) lässt sich die Verwindung des durch ihn hindurchgezogenen Textilstoffes im Abtastgerät (2) abtasten. Dabei wird der Bügel (8) ausgelenkt. Wenn ein vorgegebener Wert überschritten wird, wird vom Abtastgerät (2) ein Steuerbefehl auf das Regelgerät (10) übertragen. Dieses Regelgerät (10) steuert das Verhältnis Umfangsgeschwindigkeit Förderzylinder (3) / Drehzahl Drehtisch (1). Durch diese Steuerung lässt sich ein äusserst feines Regeln durchführen, welches beispielsweise aufgrund des Schlupfes zwischen dem schlauchförmigen Textilstoff und den Förderzylindern (3) notwendig werden kann. Der obere Rand des zu schneidenden Stoffes wird durch mindestens ein Abtastgerät (6) abgetastet. Die Abtaststelle befindet sich vorteilhaft zwischen dem in Laufrichtung letzten Förderzylinder (3) und den Schnittwerkzeugen (13, 14) der Schneidevorrichtung (7). Die Ausgangssignale des Abtastgerätes (6) sind der Verstellvorrichtung (15) zugeführt, welche den Hub der oszillierenden Mantelabschnitte (4, 5) der Förderzylinder (3) steuert. Durch diese Steueranordnung, einerseits die Steuerung des genannten Verhältnisses und andererseits des Hubes der Mantelabschnitte (4, 5) der Förderzylinder (3) lassen sich Bänder mit vorgegebenen Bandbreiten mit grösster Präzision schneiden.The torsion of the textile material drawn through it can be sensed in the scanning device (2) by means of the bracket (8) arranged above the rotary table (1). The bracket (8) is deflected. If a predetermined value is exceeded, a control command is transmitted from the scanning device (2) to the control device (10). This control device (10) controls the ratio of the peripheral speed of the feed cylinder (3) / speed of the rotary table (1). This control enables extremely fine regulation to be carried out, which may be necessary, for example, due to the slippage between the tubular textile material and the delivery cylinders (3). The upper edge of the material to be cut is scanned by at least one scanning device (6). The scanning point is advantageously located between the last delivery cylinder (3) in the running direction and the cutting tools (13, 14) of the cutting device (7). The output signals of the scanning device (6) are fed to the adjusting device (15), which controls the stroke of the oscillating jacket sections (4, 5) of the delivery cylinders (3). By means of this control arrangement, on the one hand the control of the above-mentioned ratio and on the other hand the stroke of the jacket sections (4, 5) of the conveying cylinders (3), strips with predetermined bandwidths can be cut with the greatest precision.

Description

Die vorliegende Erfindung betrifft eine Band­schneidemaschine mit einem motorgetriebenen Drehtisch zur Aufnahme eines Vorrats eines zu schneidenden schlauchförmigen Textilstoffes, mit einem ersten Abtast­gerät, das dazu dient, die Drehstellung eines vom Vorrat abgezogenen, noch nicht aufgespannten Abschnittes des Textilstoffes relativ zum Drehtisch abzutasten, mit mehreren motorgetriebenen rotierenden Förderzylindern, die jeweils eine Anzahl axial oszillierende Mantelab­schnitte mit verstellbarem Hub aufweisen, mit mindestens einem zweiten Abtastgerät, das dazu dient, jeweils die Stellung eines Randabschnittes des von den Förderzylin­dern aufgespannten schlauchförmigen Textilstoffes abzu­tasten, und mit einer Schneidevorrichtung mit rotieren­den Schnittwerkzeugen, mittels welchen der Textilstoff zu mindestens einem Band geschnitten wird.The present invention relates to a tape cutting machine with a motor-driven rotary table for receiving a supply of a tubular textile material to be cut, with a first scanning device which serves to scan the rotational position of a section of the textile material which has been drawn from the supply and has not yet been opened up relative to the rotary table, with a plurality of motor-driven ones rotating conveyor cylinders, each having a number of axially oscillating jacket sections with adjustable stroke, with at least a second scanning device, which is used to scan the position of an edge section of the tubular textile material spanned by the conveyor cylinders, and with a cutting device with rotating cutting tools, by means of which the Textile fabric is cut into at least one band.

Eine solche Bandschneidemaschine ist in der US-PS 4.592.260 offenbart. Diese bekannte Bandschneide­maschine arbeitet zuverlässig und zufriedenstellend. Es besteht jedoch das Bestreben, textile Bänder mit noch höherer Gleichförmigkeit der geschnittenen Ränder her­zustellen. Bekanntlich sind textile Stoffe allgemein schlaffe Gebilde, d.h. dass man auf diese wohl Zugbean­spruchungen ausüben kann, jedoch keinerlei Druck. Weiter weisen textile Stoffe den Nachteil auf, dass sie sich dann verformen, wenn eine zu grosse Zugkraft ausgeübt wird. Weil folglich auch Auflagekräfte zwischen texti­len Stoffen und diese transportierenden rotierenden Ar­beitsteilen, z.B. Walzen aus den obigen Gründen möglichst klein gehalten werden müssen, entsteht oft ein mindestens zeitweiliger Schlupf zwischen solchen Trans­portwalzen und dem textilen Stoff.Such a tape cutting machine is disclosed in U.S. Patent 4,592,260. This known tape cutting machine works reliably and satisfactorily. However, there is a desire to produce textile tapes with even higher uniformity of the cut edges. As is well known, textile fabrics are generally flaccid structures, which means that one can exert tensile loads on them, but no pressure whatsoever. Furthermore, textile fabrics have the disadvantage that they are then deform when excessive pulling force is exerted. Because consequently the contact forces between textile materials and the rotating work parts transporting them, for example rollers, must be kept as small as possible for the above reasons, there is often an at least temporary slip between such transport rollers and the textile material.

Hier will die Erfindung Abhilfe schaffen. Die Erfindung, wie sie in den Ansprüchen gekennzeichnet ist, löst die Aufgabe, eine Bandschneidemaschine zu schaffen, welche die oben erwähnten Eigenheiten des zu verarbei­tenden Stoffes noch besser als bisher berücksichtigt und Bänder mit erhöhter Gleichförmigkeit ihrer Ränder und genaueren Einhaltung der Bandbreite eines gesamten Bandes herstellen lässt.The invention seeks to remedy this. The invention, as characterized in the claims, solves the problem of creating a tape cutting machine which takes into account the above-mentioned peculiarities of the material to be processed even better than before and produce tapes with increased uniformity of their edges and more precise compliance with the bandwidth of an entire tape leaves.

Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, dass die Dreh­stellung des vom Vorrat abgezogenen Stoffes relativ zum Drehtisch abgetastet wird, und beim Ueberschreiten einer festgelegten Winkelstellung die Umfangsgeschwindigkeit der Förderzylinder korrigiert wird, und dass durch ein weiteres Abtastgerät der Ort des Randes des textilen Stoffes relativ zur Schneidevorrichtung ermittelt wird und bei Abweichungen vom Sollwert der Hub der Mantel­abschnitte der Förderzylinder korrigiert wird. Damit lassen sich Bandbreitenfehler aufgrund des Schlupfes zwischen dem textilen Stoff und den Mantelabschnitten des Förderzylinders beheben.The advantages achieved by the invention are essentially to be seen in the fact that the rotational position of the material withdrawn from the supply is scanned relative to the turntable, and when a predetermined angular position is exceeded, the peripheral speed of the delivery cylinders is corrected, and that the location of the edge is determined by a further scanning device of the textile material is determined relative to the cutting device and the deviation of the desired value, the stroke of the jacket sections of the delivery cylinders is corrected. Bandwidth errors due to the slippage between the textile material and the jacket sections of the feed cylinder can thus be eliminated.

Im folgenden wird die Erfindung anhand von lediglich einen Ausführungsweg darstellenden Zeichnungen näher erläutert. Es zeigt:

  • Fig. 1 rein schematisch eine bevorzugte Aus­führung der Erfindung, und
  • Fig. 2 Einzelheiten der Schneidevorrichtung.
The invention is explained in more detail below with the aid of drawings which illustrate only one embodiment. It shows:
  • Fig. 1 purely schematically, a preferred embodiment of the invention, and
  • Fig. 2 details of the cutting device.

Abgesehen von den die Erfindung ausmachenden Elementen ist der Aufbau der Bandschneidemaschine, auf die hier Bezug genommen wird, identisch zu dem der in der US-PS 4.592.260 im einzelnen beschriebenen Maschine, so dass eine nochmalige ins Einzelne gehende Beschrei­bung des Aufbaus und auch des Betriebs verzichtet ist. Es werden lediglich die zum Verständnis der Erfindung notwendigen Bauteile näher beschrieben.Except for those that make up the invention The construction of the band cutting machine referred to here is identical to that of the machine described in detail in US Pat. No. 4,592,260, so that a detailed description of the construction and also the operation is omitted. Only the components necessary for understanding the invention are described in more detail.

Die Bandschneidemaschine weist einen Drehtisch 1 auf. Auf diesem Drehtisch ist der zu schneidende schlauchförmige Testilstoff in einem Vorratszustand, z.B. in einer gerollten oder gefalteten Stellung gela­gert. Der Antrieb dieses Drehtisches erfolgt über den Motor 11. Ein Bügel 8 ist in einem mit dem Drehtisch 1 fest verbundenen Träger 16 gelagert. Dieser Bügel ist in einer senkrecht zur Ebene des Zeichnungsblattes ver­laufenden Ebene begrenzt drehbar. Auf bzw. im Träger 16 ist ein Fühler 9 vorhanden. Dieser Fühler dient zur Abtastung der Drehstellung des Bügels 8 relativ zum Drehtisch 1. Insbesondere soll der Fühler 9 dann an­sprechen, wenn die Drehstellung des Bügels 8 relativ zum Drehtisch 1 einen bestimmten Wert, also Winkel über­steigt. Solche Fühler sind in den vielfältigsten Aus­bildungen allgemein erhältlich. Es kann ein elektro­mechanisch arbeitender, rein elektrisch oder auch op­tisch arbeitender Fühler vorhanden sein.The tape cutting machine has a turntable 1. On this turntable, the tubular test cloth to be cut is in a stock state, e.g. stored in a rolled or folded position. This turntable is driven by the motor 11. A bracket 8 is mounted in a carrier 16 which is firmly connected to the turntable 1. This bracket can be rotated to a limited extent in a plane perpendicular to the plane of the drawing sheet. A sensor 9 is present on or in the carrier 16. This sensor is used to scan the rotational position of the bracket 8 relative to the rotary table 1. In particular, the sensor 9 should respond when the rotary position of the bracket 8 relative to the rotary table 1 exceeds a certain value, that is to say the angle. Such sensors are generally available in a wide variety of designs. There may be an electromechanical, purely electrical or optically working sensor.

Der vom Fühler 9 des Abtastgerätes 2 ermittel­te Messwert wird einem Regelgerät 10 zugeführt.The measured value determined by the sensor 9 of the scanning device 2 is fed to a control device 10.

Die Förderzylinder 3 sind vom Antriebsmotor 12 über einen Riementrieb 17 angetrieben.The feed cylinders 3 are driven by the drive motor 12 via a belt drive 17.

Das Regelgerät 10 steht über die Steuerleitung 18 mit dem Motor 11 des Drehtisches 1 und über die Steuerleitung 19 mit dem Motor 12 der Förderzylinder 3 in Verbindung.The control device 10 is connected via the control line 18 to the motor 11 of the turntable 1 and via the control line 19 to the motor 12 of the feed cylinder 3.

Im Betrieb dreht sich bekanntlicherweise der Drehtisch 1 im selben Drehsinn wie die Förderzylinder 3. Die Förderzylinder 3 sollten eigentlich insbesondere in bezug auf ihre Umfangsgeschwindigkeit synchron mit dem Drehtisch 1 rotieren, ein Zustand, der sich jedoch auf­grund des aus den früher erwähnten Gründen ergebenden Schlupfes zwischen dem textilen Stoff und den Förderzy­lindern nicht immer erreichbar ist. Wie nun in der vor­genannten Veröffentlichung erklärt, wird der auf dem Drehtisch 1 liegende Textilstoff durch den Bügel 8 ge­fädelt und darauf um die Förderzylinder 3 gespannt. Wenn nun die Drehzahl des Drehtisches 1 nicht mit der Dreh­zahl des um die Förderzylinder 3 aufgespannten Stoffes übereinstimmt, beginnt dieser sich zu verwinden, so dass der Bügel 8 relativ zum Drehtisch 1 vorläuft oder nach­läuft. Die sich damit ergebende Winkeländerung wird durch den Fühler 9 festgestellt und die entsprechenden Steuersignale über das Abtastgerät 2 dem Regler 10 zuge­führt, der das Verhältnis Umfangsgeschwindigkeit der Förderzylinder 3/Drehzahl Drehtisch 1 derart regelt, dass die Verwindung aufgehoben wird. In diesem Beispiel wird dazu die Drehzahl des Motors 12 der Förderzylinder geändert.As is known, the turntable 1 rotates in operation in the same direction as the feed cylinders 3. The conveying cylinders 3 should actually rotate synchronously with the turntable 1, in particular with respect to their peripheral speed, a condition which, however, is not always achievable due to the slippage between the textile material and the conveying cylinders resulting from the reasons mentioned earlier. As explained in the aforementioned publication, the textile material lying on the turntable 1 is threaded through the bracket 8 and then stretched around the delivery cylinder 3. If the speed of the turntable 1 does not match the speed of the material stretched around the feed cylinder 3, this begins to twist, so that the bracket 8 leads or runs relative to the turntable 1. The resulting change in angle is determined by the sensor 9 and the corresponding control signals are fed via the scanning device 2 to the controller 10, which regulates the ratio of the peripheral speed of the delivery cylinder 3 / speed of the rotary table 1 in such a way that the torsion is eliminated. In this example, the speed of the motor 12 of the feed cylinders is changed.

Zum Steuern der Schnittbreite ist die Band­schneidemaschine weiter mit mindestens einem Abtastgerät 6 ausgerüstet, welche die Stellung des oberen Randes des zu schneidenden Textilstoffes abtastet. Für das Abtast­element selbst sind wieder die unterschiedlichsten im Handel allgemein erhältlichen Ausführungen denkbar. Wichtig ist, dass das Ausgangssignal 6 des Abtastgerätes jeweils einer Verstellvorrichtung 15 zugeführt ist. Diese Verstellvorrichtung 15 steuert den Hub der Mantel­abschnitte 4, 5. Die Steuerung der Bewegung der Mantel­abschnitte 4, 5 gleicht derjenigen der bereits genannten Veröffentlichung. Die Steuerung des Hubes kann eben­falls gemäss der genannten Ausführung erfolgen, wobei hier offensichtlich die Verstellvorrichtung 15 aus einem Schrittmotor oder anderen auf dem Markt erhältlichen Antrieben bestehen kann. Dabei können, gemäss einer Ausführung der Erfindung, die Hübe aller Mantelabschnit­te 4, 5 aller Förderzylinder 3 verstellt werden oder dann alternativ nur ausgewählter Förderzylinder 3. Eine weitere Möglichkeit besteht darin, dass abhängig von der vom Abtastgerät 3 abgetasteten Stellung des oberen Randes die Mantelabschnitte 4, 5 nur einiger der Förder­zylinder 3 zu verstellen. Weiter kann zwischen zwei Förderzylindern jeweils ein Abtastgerät 3 vorhanden sein, welches in Laufrichtung des Stoffes gesehen auf den nachfolgenden und/oder vorangehenden Förderzylinder ein­wirken kann. Durch das Abtasten zwischen der in Lauf­richtung insbesondere zwischen dem letzten Förderzylin­der 3 und den Schnittwerkzeugen 13, 14 gelegenen Stelle des Randes ist eine äusserst genaue Steuerung der ge­schnittenen Bandbreite erzielbar, weil auch hier wieder ein möglicher Schlupf und sogar Gleiten des von den För­derzylindern 3 aufgespannten Textilstoffes auftreten könnte.To control the cutting width, the tape cutting machine is further equipped with at least one scanning device 6, which scans the position of the upper edge of the textile material to be cut. For the scanning element itself, a wide variety of designs that are generally available commercially are conceivable. It is important that the output signal 6 of the scanning device is fed to an adjusting device 15. This adjusting device 15 controls the stroke of the jacket sections 4, 5. The control of the movement of the jacket sections 4, 5 is the same as that of the publication already mentioned. The stroke can also be controlled in accordance with the aforementioned embodiment, with the adjustment device 15 obviously being made from one Stepper motor or other drives available on the market. According to one embodiment of the invention, the strokes of all jacket sections 4, 5 of all delivery cylinders 3 can be adjusted or, alternatively, only selected delivery cylinders 3. Another option is that depending on the position of the upper edge sensed by scanning device 3, jacket sections 4 , 5 to adjust only some of the feed cylinders 3. Furthermore, a scanning device 3 can be present between each of the two delivery cylinders, which, viewed in the direction of travel of the material, can act on the subsequent and / or preceding delivery cylinder. By scanning between the point of the edge located in the running direction, in particular between the last feed cylinder 3 and the cutting tools 13, 14, an extremely precise control of the cut bandwidth can be achieved, because here, too, possible slippage and even sliding of the textile material stretched by the feed cylinders 3 could occur.

Durch die Steuerung der Umfangsgeschwindigkeit der För­derzylinder 3 relativ zur Drehzahl des Drehtisches 1 mit Abtastung und entsprechender Hubverstellung der Man­telabschnitte 4, 5 der Förderzylinder 3 lässt sich eine äusserst präzis geschnittene Bandbreite erreichen.By controlling the peripheral speed of the feed cylinder 3 relative to the speed of the turntable 1 with scanning and corresponding stroke adjustment of the jacket sections 4, 5 of the feed cylinder 3, an extremely precisely cut bandwidth can be achieved.

In der Fig. 2 ist eine Ausführung der Schneide­vorrichtung 7 gezeigt, die ein besonders einfaches Ver­stellen zum Wählen unterschiedlicher Bandbreiten er­möglicht. Die Schneidevorrichtung 7 weist zwei gegen­läufig angetriebene Messerwellen 20, 21 auf, wobei deren Antrieb in bekannter Weise erfolgt. Auf der einen Mes­serwelle, hier die Messerwelle 20, sind als beispiels­weise Anordnung drei Messer 13, 13′, 13˝ angeordnet. Jedes dieser Messer 13, 13′, 13˝ ist mit einer Feststell­vorrichtung 22 versehen, mittels der die jeweiligen Mes­ ser in der erwünschten axialen Stellung entlang der Messerwelle 20 mit derselben drehfest verbunden werden können. Als Beispiel ist hier eine einfache Nabe mit einer Klemmschraube gezeichnet. Auf der anderen Messer­welle, die mit der Bezugsziffer 21 bezeichnet ist, sind nun die sich zu den oben genannten Messern der Messer­welle 20 paarweise ergänzenden Gegenmesser 14, 14′, 14˝ gelagert. Im Gegensatz zu früher bekannten Ausbildun­gen, bei denen diese Messer 14, 14′, 14˝ z.B. mittels Federn gegen die Messer 13, 13′, 13˝ gedrückt werden, sind die Gegenmesser 14, 14′, 14˝ auf der Messerwelle 21 lediglich drehfest, jedoch frei axial verschiebbar ge­lagert. Dazu kann eine Feder- und Nutanordnung vorhan­den sein. Somit liegen die Messer 14, 14′, 14˝ lediglich aufgrund ihres Eigengewichtes auf den Messern 13, 13′, 13˝ auf; es hat sich überraschenderweise herausgestellt, dass die dabei vorhandene Auflagekraft zur Erzielung eines einwandfreien Schnittes geneigt. Um eine genügen­de Auflagekraft insbesondere bei höheren Drehzahlen der Messerwellen 20, 21 sicherzustellen, sind bei der ge­zeigten Ausführung die Messer 14, 14′, 14˝ mit etwas überbemessenen Naben 23 ausgerüstet, welche das erfor­derliche Gewicht zum Erreichen eines einwandfreien Schnittes aufbringen.An embodiment of the cutting device 7 is shown in FIG. 2, which enables a particularly simple adjustment for selecting different bandwidths. The cutting device 7 has two knife shafts 20, 21 driven in opposite directions, the drive of which takes place in a known manner. On one knife shaft, here the knife shaft 20, three knives 13, 13 ', 13' are arranged as an arrangement, for example. Each of these knives 13, 13 ', 13˝ is provided with a locking device 22, by means of which the respective measurement ser in the desired axial position along the cutter shaft 20 can be rotatably connected to the same. A simple hub with a clamping screw is drawn here as an example. On the other knife shaft, which is designated by the reference numeral 21, the counter knives 14, 14 ', 14' which complement each other in pairs to the above-mentioned knives of the knife shaft 20 are now supported. In contrast to previously known designs, in which these knives 14, 14 ', 14' are pressed, for example by means of springs, against the knives 13, 13 ', 13', the counter knives 14, 14 ', 14' on the knife shaft 21 are only non-rotatable , but freely axially displaceable. For this purpose, a tongue and groove arrangement can be present. Thus, the knives 14, 14 ', 14˝ only because of their own weight on the knives 13, 13', 13˝; it has surprisingly been found that the existing contact force tends to achieve a perfect cut. In order to ensure a sufficient contact force, in particular at higher speeds of the cutter shafts 20, 21, in the embodiment shown, the cutters 14, 14 ', 14 ausgerüstet are equipped with somewhat oversized hubs 23 which apply the weight required to achieve a perfect cut.

Claims (3)

1. Bandschneidemaschine mit einem motorgetrie­benen Drehtisch (1) zur Aufnahme eines Vorrats eines zu schneidenden schlauchförmigen Textilstoffes, mit einem ersten Abtastgerät (2), das dazu dient, die Drehstellung eines vom Vorrat abgezogenen, noch nicht aufgespannten Abschnittes des Textilstoffes relativ zum Drehtisch (1) abzutasten, mit mehreren motorgetriebenen rotierenden Förderzylindern (3), die jeweils eine Anzahl axial oszil­lierende Mantelabschnitte (4, 5) mit verstellbarem Hub aufweisen, mit mindestens einem zweiten Abtastgerät (6), das dazu dient, jeweils die Stellung eines Randabschnit­tes des von den Förderzylindern (3) aufgespannten schlauchförmigen Textilstoffes abzutasten, und mit einer Schneidevorrichtung (7) mit rotierenden Schnittwerkzeu­gen, mittels welchen der Textilstoff zu mindestens einem Band geschnitten wird, dadurch gekennzeichnet, dass das erste Abtastgerät (2) einen zum Umfassen des noch nicht aufgespannten Abschnitts bestimmten, im Drehtisch (1) begrenzt drehbar gelagerten Bügel (8) und einen Fühler (9) aufweist, welcher die Winkelstellung des Bügels (8) relativ zum Drehtisch (1) misst, wobei die ermittelten Messwerte einem Regelgerät (10) zugeführt sind, welches das Verhältnis Umfangsgeschwindigkeit der Förderzylinder (3) / Drehzahl Drehtisch (1) derart steuert, dass bei Ueberschreitung eines festgelegten Grenzwertes der Win­kelstellung das genannte Verhältnis zur Behebung der Ueberschreitung geändert wird, dass die Schneidevorrich­tung (7) axial unverschiebbare Schnittwerkzeuge (13, 14) aufweist, und dass mindestens ein zweites Abtastgerät (6) zwischen der Schneidevorrichtung (7) und dem ihr nächstgelegenen Förderzylinder (3) angeordnet ist, wobei das Ausgangssignal einer jeweiligen zweiten Abtastge­ rätes einer Vorrichtung (15) zur Verstellung des Hubes der Mantelabschnitte (4, 5) mindestens einem der Förder­zylinder (3) zugeführt ist.1. Tape cutting machine with a motor-driven turntable (1) for holding a supply of a tubular textile material to be cut, with a first scanning device (2), which serves to determine the rotational position of a section of the textile material that has been drawn from the supply and has not yet been stretched relative to the turntable (1 ) to be scanned, with a plurality of motor-driven rotating delivery cylinders (3), each of which has a number of axially oscillating jacket sections (4, 5) with an adjustable stroke, with at least one second scanning device (6), which serves in each case to determine the position of an edge section of the To scan conveying cylinders (3) stretched tubular textile material, and with a cutting device (7) with rotating cutting tools, by means of which the textile material is cut into at least one band, characterized in that the first scanning device (2) determines a section for grasping the not yet stretched section , limited rotation in the turntable (1) r mounted bracket (8) and a sensor (9) which measures the angular position of the bracket (8) relative to the rotary table (1), the measured values determined being fed to a control device (10) which determines the ratio of the peripheral speed of the delivery cylinders (3 ) / Speed of the rotary table (1) controls such that when a predetermined limit value of the angular position is exceeded, the above-mentioned ratio to correct the excess is changed, that the cutting device (7) has axially immovable cutting tools (13, 14), and that at least one second scanning device (6) is arranged between the cutting device (7) and the feed cylinder (3) closest to it, the output signal of a respective second scan advises a device (15) for adjusting the stroke of the jacket sections (4, 5) at least one of the feed cylinders (3) is supplied. 2. Bandschneidemaschine nach Anspruch 1, da­durch gekennzeichnet, dass das Ausgangssignal des min­destens einen Abtastgerätes (6), welches die Stellung eines Randabschnittes abtastet, allen Vorrichtungen zur Verstellung des Hubes der jeweiligen oszillierenden Mantelabschnitte (4, 5) zugeführt ist.2. Tape cutting machine according to claim 1, characterized in that the output signal of the at least one scanning device (6), which scans the position of an edge section, is supplied to all devices for adjusting the stroke of the respective oscillating jacket sections (4, 5). 3. Bandschneidemaschine nach Anspruch 1, da­durch gekennzeichnet, dass die Schneidevorrichtung (7) zwei gegenläufig angetriebene Messerwellen (20, 21) aufweist, welche paarweise zusammenwirkende Messer (13, 13′, 13˝; 14, 14′, 14˝) tragen, wobei die Messer (13, 13′, 13˝) der einen Messerwelle (20) mit jeweils einer Feststellvorrichtung (22) ausgerüstet sind, mittels welcher sich jedes Messer (13, 13′, 13˝) an einer er­wünschten axialen Stelle mit der Messerwelle (20) axial unverschiebbar und drehfest verbinden lässt, und die Messer (14, 14′, 14˝) der anderen Messerwelle (21) auf derselben axial frei verschiebbar und drehfest angeord­net sind und durch Wirkung ihrer Schwerkraft auf den jeweiligen Messern (13, 13′, 13˝) der erst genannten Messerwelle (20) aufliegen.3. Band cutting machine according to claim 1, characterized in that the cutting device (7) has two counter-rotating knife shafts (20, 21) which carry pairs of interacting knives (13, 13 ', 13˝; 14, 14', 14˝), wherein the knives (13, 13 ', 13˝) of one knife shaft (20) are each equipped with a locking device (22) by means of which each knife (13, 13', 13˝) at a desired axial location with the knife shaft (20) axially immovable and non-rotatably connected, and the knives (14, 14 ', 14˝) of the other knife shaft (21) on the same axially freely displaceable and rotatably arranged and by the action of their gravity on the respective knives (13, 13th ', 13˝) of the first mentioned cutter shaft (20).
EP89108876A 1988-05-27 1989-05-17 Machine for cutting tape from a tubular fabric Expired - Lifetime EP0343498B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2021/88 1988-05-27
CH2021/88A CH677942A5 (en) 1988-05-27 1988-05-27

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EP0343498A1 true EP0343498A1 (en) 1989-11-29
EP0343498B1 EP0343498B1 (en) 1992-03-25

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EP89108876A Expired - Lifetime EP0343498B1 (en) 1988-05-27 1989-05-17 Machine for cutting tape from a tubular fabric

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EP (1) EP0343498B1 (en)
JP (1) JP2667003B2 (en)
CH (1) CH677942A5 (en)
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ES (1) ES2031656T3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9928641D0 (en) * 1999-12-04 2000-02-02 Tisi Antony L P Handling flexible tubes
US10875201B2 (en) 2018-04-04 2020-12-29 Swanstrom Tools Usa Inc. Relief guard for hand tools
CN113832696B (en) * 2021-09-17 2023-09-22 安徽和邦纺织科技有限公司 Textile thread cutting equipment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4131979A (en) * 1975-12-29 1979-01-02 Hanes Corporation Machine for continuous bias cutting of tubular fabric
US4592260A (en) * 1985-03-28 1986-06-03 Swegea Maschinen Ag Band cutting machine
DE3613070A1 (en) * 1986-04-18 1987-10-29 Schiesser Ag Process and apparatus for the production of ribbons

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4131979A (en) * 1975-12-29 1979-01-02 Hanes Corporation Machine for continuous bias cutting of tubular fabric
US4592260A (en) * 1985-03-28 1986-06-03 Swegea Maschinen Ag Band cutting machine
DE3613070A1 (en) * 1986-04-18 1987-10-29 Schiesser Ag Process and apparatus for the production of ribbons

Also Published As

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JP2667003B2 (en) 1997-10-22
DE58901016D1 (en) 1992-04-30
US5083351A (en) 1992-01-28
CH677942A5 (en) 1991-07-15
JPH02152792A (en) 1990-06-12
EP0343498B1 (en) 1992-03-25
ES2031656T3 (en) 1992-12-16

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