EP0936294B1 - Method for making knitwear on a flat bed knitting machine - Google Patents
Method for making knitwear on a flat bed knitting machine Download PDFInfo
- Publication number
- EP0936294B1 EP0936294B1 EP98123873A EP98123873A EP0936294B1 EP 0936294 B1 EP0936294 B1 EP 0936294B1 EP 98123873 A EP98123873 A EP 98123873A EP 98123873 A EP98123873 A EP 98123873A EP 0936294 B1 EP0936294 B1 EP 0936294B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- yarn
- elasticity
- thread
- length
- supplied
- 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.)
- Expired - Lifetime
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Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
- D04B15/38—Devices for supplying, feeding, or guiding threads to needles
- D04B15/48—Thread-feeding devices
- D04B15/50—Thread-feeding devices for elastic threads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
- B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
- B65H59/387—Regulating unwinding speed
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
- D04B15/38—Devices for supplying, feeding, or guiding threads to needles
- D04B15/44—Tensioning devices for individual threads
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
- D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements
- D04B15/80—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the thread guides used
-
- 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
- B65H2701/319—Elastic threads
Definitions
- the elastic Threads can be made from a wide variety of materials, such as elastomers or rubber compounds. She can also be spun from other threads. Depending on the material and structure of the threads differentiates their elasticity when tensile forces act on them from the thread guide of the knitting machine.
- the present invention is based on the object Process for producing a knitted fabric with simultaneous Feeding two threads of different elasticity to the Propose needles that can be done with a flat knitting machine is and results in a perfectly even mesh.
- the task is carried out using a method of the type mentioned at the beginning Art solved according to the invention in that for each to be formed Increase the length of thread to be fed to a needle Elasticity from the supplied length of the thread less Elasticity and data on the material properties of the Thread calculated higher elasticity and a conveyor for the thread of higher elasticity according to the calculated Thread length to be fed is controlled.
- This method is the one to be fed separately for each stitch Length of the more elastic thread depending on its material properties and the supplied length of the Thread of lower elasticity determined. So you can always an optimal thread feed for all types of patterns and thread types to reach.
- the thread of higher elasticity must have a significantly lower tension inserted in the needle hook than the thread of less elasticity. This tension is built up by one according to the reduction factor less amount of thread than that of thread with less elasticity is fed for stitch formation.
- the Knitting direction can be taken into account by adding more thread higher Elasticity is supplied when the knitting direction of the Conveyor for the thread of higher elasticity points away as if the knitting direction is facing the conveyor. In this way, an optimal tension of the thread is higher Elasticity guaranteed regardless of the direction of knitting.
- the length of the thread of lower elasticity can also be reduced data supplied by a machine control unit about the respective stitch size of the thread of lower elasticity, the Stitch sequence and the number of stitches in each Knitting course can be calculated.
- a measuring device can then omitted.
- the two threads of different elasticity can be a common thread guide or separate Thread guides are fed without affecting the procedure something changes.
- the invention also includes a flat knitting machine at least one needle bed for performing a method according to one of claims 1 to 6 and is characterized by a bobbin for the thread of lower elasticity, a conveyor for the thread of higher elasticity, at least a thread guide for the two threads of different elasticity, a machine control unit and a computing and Control unit for determining the length of the thread to be fed higher elasticity and to control the conveyor for the thread of higher elasticity.
- the conveyor can, similar to the conveyors for the. elastic threads in circular knitting machines, two driven in the same direction, have parallel conveyor rollers of the same diameter, on which a bobbin with the thread of higher elasticity their scope.
- This conveyor can with a electric motor coupled to the computing and control unit be provided, whereby the peripheral speeds of the Conveyor rollers according to the calculated length to be fed of the thread regulates higher elasticity.
- a thread tensioner be for a voltage equalization with abrupt speed changes of the thread guide.
- a thread break sensor his for the thread higher elasticity provided a thread break sensor his.
- Thread feeding devices for a flat knitting machine for Carrying out the method according to the invention using the Drawing explained in more detail.
- a needle bed 10 is an otherwise not shown Flat knitting machine shown, to which by means of a Thread guide FF a thread of lower elasticity 11 and one Thread of higher elasticity 12 are supplied.
- the thread less Elasticity 11 is withdrawn from a spool 13 and via a thread tensioner 14 and a measuring device 15 Thread guide FF fed via several deflection rollers U1 to U7.
- the measuring device 15 constantly measures that required for a stitch Length of thread of lower elasticity 11 and transmitted this size via a data line 16 to a Computing and control unit 17, which is connected via a data line 18 also with a machine control unit 19 of the flat knitting machine and via a control line 20 with a conveyor 21 connected to the thread of higher elasticity 12 is.
- the Faden's lower elasticity 11 receives the computing and Control unit 17 from the machine control unit 19 information about the material properties of the thread of higher elasticity 12 and uses this to calculate the length of the Thread higher elasticity 12 and controls accordingly an electric motor 22 of the conveyor device 21 for the thread higher elasticity 12.
- the motor 22 drives two conveyor rollers 23 of the same diameter on which a coil 24 with the thread of higher elasticity 12 rests with its circumference. ever after the peripheral speed of the conveyor rollers 23 becomes more or less of the thread of higher elasticity 12 the thread guide FF fed. The thread becomes more elastic 12 directly from the bobbin 24 without further thread tensioning devices or the like fed to the thread guide FF. It is just another sensor 25 for detecting thread breaks in the Thread feed provided.
- the feed device 2 no measuring device 15 for measurement the supplied length of the thread of lower elasticity 11 intended.
- the computing and control unit 17 receives in addition the data on the yarn properties of the thread of higher elasticity 12 from a machine control unit 19 'also information less about the respective mesh sizes of the thread Elasticity 11, the stitch sequence and the number of stitches in the row of knitting and the direction of knitting. Calculated from this the computing and control unit 17 the length to be supplied the thread of higher elasticity 12 and controls accordingly the conveyor device 21 for the thread of higher elasticity 12 on.
- a reduction factor is calculated, with which the supplied length of the thread less elasticity 11 is multiplied by the length of the thread to be fed to obtain higher elasticity 12.
- the computing and control unit 17 recognizes whether the Thread guide FF of thread of higher elasticity 12 from the conveyor 21 moved away or towards this, and thus can the amount of thread when moving the thread guide FF from the Enlarge conveyor 21 away and on the move to reduce the conveyor 21. This ensures that the thread of higher elasticity 12 always the optimal Has thread tension.
- the thread tensioner 14 ensures a constant thread tension.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
- Confectionery (AREA)
Description
Es gibt eine ganze Reihe von Gestricken, bei denen Fäden unterschiedlicher Elastizität gemeinsam verarbeitet werden. So wird beispielsweise bei Stütz- oder Kompressionsstrümpfen der Tragekomfort durch einen textilen Grundfaden geringer Elastizität und die definierte Stütz- und Kompressionskraft durch die Spannkraft eines elastischen Fadens erreicht. Die elastischen Fäden können dabei aus den unterschiedlichsten Materialien, wie Elastomeren oder Gummimischungen, bestehen. Sie können auch von anderen Fäden eingesponnen sein. Je nach Material und Aufbau der Fäden differiert ihre Elastizität, wenn vom Fadenführer der Strickmaschine Zugkräfte auf sie wirken. Für ein gleichmäßiges Gestrickbild ist es notwendig, beim Zuführen von Fäden unterschiedlicher Elastizität für die Maschenbildung zu den Nadeln einer Strickmaschine zu beachten, dass der Faden höherer Elastizität mit einer geringen und über die gesamte Gestrickbreite hinweg gleichmäßigen Spannung in die Nadelhaken eingelegt wird. Außerdem muss darauf geachtet werden, dass die beiden Fäden unterschiedlicher Elastizität eine Masche gleicher Form und Größe bilden. Für Rundstrickmaschinen wurde bereits eine Einrichtung entwickelt, die den Faden höherer Elastizität mit der für ihn und das herzustellende Gestrick spezifischen Spannung dem Fadenführer zuleitet. Die Einrichtung weist zwei gleichsinnig angetriebene, parallele Wellen auf, auf denen die Spule mit dem elastischen Faden mit ihrem Umfang aufliegt. Die Wellen sind über einen Zahnriemen direkt mit dem Antrieb der Strickmaschine gekoppelt. Die Drehzahl und damit die Umfangsgeschwindigkeit der Wellen steht somit in einem festen Verhältnis zur Drehzahl der Strickmaschine. Bei hoher Strickgeschwindigkeit wird viel Faden von der Spule abgewickelt, und bei geringer Strickgeschwindigkeit entsprechend weniger. Bei Flachstrickmaschinen lässt sich diese Einrichtung jedoch nicht anwenden, da hier in einer Strickreihe unterschiedlich große Maschen gebildet werden können und auch die Breite der einzelnen Maschenreihen differieren kann. Eine Zuführung eines Fadens hoher Elastizität allein in Abhängigkeit von der Strickgeschwindigkeit ist hier also nicht möglich.There are quite a number of knitted fabrics with threads different elasticity can be processed together. So is for example in support or compression stockings Comfort thanks to a textile basic thread with low elasticity and the defined support and compression force the resilience of an elastic thread is reached. The elastic Threads can be made from a wide variety of materials, such as elastomers or rubber compounds. she can also be spun from other threads. Depending on the material and structure of the threads differentiates their elasticity when tensile forces act on them from the thread guide of the knitting machine. For a uniform knitted pattern, it is necessary to Feeding threads of different elasticity for the To consider stitch formation to the needles of a knitting machine, that the thread of higher elasticity with a low and over uniform tension across the entire width of the knitted fabric the needle hook is inserted. In addition, care must be taken be that the two threads of different elasticity form a stitch of the same shape and size. For circular knitting machines A facility has already been developed that Thread of higher elasticity with that for him and that to be manufactured Knitting specific tension feeds the thread guide. The device has two parallel drives driven in the same direction Waves on which the bobbin with the elastic thread with its scope. The shafts are over a toothed belt directly coupled to the drive of the knitting machine. The Speed and thus the peripheral speed of the waves thus in a fixed ratio to the speed of the knitting machine. At high knitting speeds, there is a lot of thread the spool unwound, and at low knitting speed correspondingly less. With flat knitting machines do not use this facility, however, because here in one Row of stitches of different sizes are formed can and also vary the width of the individual courses can. A thread of high elasticity depending on the knitting speed alone is here so not possible.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung eines Gestricks mit gleichzeitiger Zuführung zweier Fäden unterschiedlicher Elastizität zu den Nadeln vorzuschlagen, das mit einer Flachstrickmaschine durchführbar ist und ein vollkommen gleichmäßiges Maschenbild ergibt.The present invention is based on the object Process for producing a knitted fabric with simultaneous Feeding two threads of different elasticity to the Propose needles that can be done with a flat knitting machine is and results in a perfectly even mesh.
Die Aufgabe wird mit einem Verfahren der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass für jede zu bildende Masche die einer Nadel zuzuführende Länge des Fadens höherer Elastizität aus der zugeführten Länge des Fadens geringerer Elastizität und Daten über die Materialbeschaffenheit des Fadens höherer Elastizität berechnet und eine Fördervorrichtung für den Faden höherer Elastizität entsprechend der berechneten zuzuführenden Fadenlänge angesteuert wird. Nach diesem Verfahren wird also für jede Masche gesondert die zuzuführende Länge des elastischeren Fadens in Abhängigkeit von seinen Materialeigenschaften sowie der zugeführten Länge des Fadens geringerer Elastizität bestimmt. Damit lässt sich stets eine optimale Fadenzufuhr für sämtliche Musterarten und Fadentypen erreichen. Bei einer bevorzugten Variante des Verfahrens wird aus den Daten über die Materialbeschaffenheit des Fadens höherer Elastizität ein Minderungsfaktor berechnet, mit dem die Länge des Fadens geringerer Elastizität multipliziert wird, um die zuzuführende Länge des Fadens höherer Elastizität zu erhalten. Der Faden höherer Elastizität muss mit einer deutlich niedrigeren Spannung in die Nadelhaken eingelegt werden als der Faden geringerer Elastizität. Diese Spannung wird aufgebaut, indem eine entsprechend dem Minderungsfaktor geringere Fadenmenge als die des Fadens geringerer Elastizität zur Maschenbildung zugeführt wird. Außerdem kann auch die Strickrichtung berücksichtigt werden, indem mehr Faden höherer Elastizität zugeführt wird, wenn die Strickrichtung von der Fördervorrichtung für den Faden höherer Elastizität wegweist als wenn die Strickrichtung auf die Fördervorrichtung zuweist. Auf diese Weise ist eine optimale Spannung des Fadens höherer Elastizität unabhängig von der Strickrichtung gewährleistet. Die für die Berechnung der zuzuführenden Länge des Fadens höherer Elastizität notwendige Information über die zugeführte Länge des Fadens geringerer Elastizität kann beispielsweise durch eine Messeinrichtung ermittelt werden. Die zugeführte Länge des Fadens geringerer Elastizität kann jedoch auch aus von einer Maschinensteuereinheit gelieferten Daten über die jeweilige Maschengröße des Fadens geringerer Elastizität, die Maschenfolge und die Anzahl der Maschen in der jeweiligen Strickreihe berechnet werden. Eine Messeinrichtung kann dann entfallen. Die beiden Fäden unterschiedlicher Elastizität können einem gemeinsamen Fadenführer oder aber auch getrennten Fadenführern zugeführt werden, ohne dass sich am Verfahren etwas ändert. The task is carried out using a method of the type mentioned at the beginning Art solved according to the invention in that for each to be formed Increase the length of thread to be fed to a needle Elasticity from the supplied length of the thread less Elasticity and data on the material properties of the Thread calculated higher elasticity and a conveyor for the thread of higher elasticity according to the calculated Thread length to be fed is controlled. To this method is the one to be fed separately for each stitch Length of the more elastic thread depending on its material properties and the supplied length of the Thread of lower elasticity determined. So you can always an optimal thread feed for all types of patterns and thread types to reach. In a preferred variant of the method is obtained from the data on the material properties of the thread higher elasticity calculated a reduction factor with which multiplied the length of the thread of lower elasticity is to be fed the length of the thread of higher elasticity to obtain. The thread of higher elasticity must have a significantly lower tension inserted in the needle hook than the thread of less elasticity. This tension is built up by one according to the reduction factor less amount of thread than that of thread with less elasticity is fed for stitch formation. In addition, the Knitting direction can be taken into account by adding more thread higher Elasticity is supplied when the knitting direction of the Conveyor for the thread of higher elasticity points away as if the knitting direction is facing the conveyor. In this way, an optimal tension of the thread is higher Elasticity guaranteed regardless of the direction of knitting. For the calculation of the length of the thread to be fed higher elasticity necessary information about the supplied Length of thread of less elasticity can be, for example can be determined by a measuring device. The fed However, the length of the thread of lower elasticity can also be reduced data supplied by a machine control unit about the respective stitch size of the thread of lower elasticity, the Stitch sequence and the number of stitches in each Knitting course can be calculated. A measuring device can then omitted. The two threads of different elasticity can be a common thread guide or separate Thread guides are fed without affecting the procedure something changes.
Die Erfindung umfaßt außerdem eine Flachstrickmaschine mit
mindestens einem Nadelbett zur Durchführung eines Verfahrens
nach einem der Ansprüche 1 bis 6 und ist gekennzeichnet durch
eine Spule für den Faden geringerer Elastizität, einer Fördervorrichtung
für den Faden höherer Elastizität, mindestens
einem Fadenführer für die beiden Fäden unterschiedlicher Elastizität,
einer Maschinensteuereinheit und einer Rechen- und
Steuereinheit zur Ermittlung der zuzuführenden Länge des Fadens
höherer Elastizität und zur Ansteuerung der Fördervorrichtung
für den Faden höherer Elastizität. Die Fördervorrichtung
kann, ähnlich wie die Fördervorrichtungen für die. Elastikfäden
bei Rundstrickmaschinen, zwei gleichsinnig angetriebene,
parallele Förderwalzen gleichen Durchmessers aufweisen,
auf denen eine Spule mit dem Faden höherer Elastizität mit
ihrem Umfang aufliegt. Diese Fördervorrichtung kann mit einem
mit der Rechen- und Steuereinheit gekoppelten Elektromotor
versehen sein, wodurch sich die Umfangsgeschwindigkeiten der
Förderwalzen entsprechend der berechneten zuzuführenden Länge
des Fadens höherer Elastizität regeln lässt. Zwischen der
Spule für den Faden geringerer Elastizität und dem Fadenführer
kann in an sich bekannter Weise ein Fadenspanner angeordnet
sein, der für einen Spannungsausgleich bei abrupten Geschwindigkeitsänderungen
des Fadenführers sorgt. Außerdem kann für
den Faden höherer Elastizität ein Fadenbruchsensor vorgesehen
sein.The invention also includes a flat knitting machine
at least one needle bed for performing a method
according to one of
Nachfolgend werden zwei bevorzugte Ausführungsbeispiele von Fadenzuführvorrichtungen für eine Flachstrickmaschine zur Durchführung des erfindungsgemäßen Verfahrens anhand der Zeichnung näher erläutert.Below are two preferred embodiments of Thread feeding devices for a flat knitting machine for Carrying out the method according to the invention using the Drawing explained in more detail.
Es zeigen:
- Fig. 1
- eine schematische Ansicht einer ersten Fadenzuführvorrichtung;
- Fig. 2
- eine schematische Ansicht einer zweiten Fadenzuführvorrichtung.
- Fig. 1
- a schematic view of a first thread feeding device;
- Fig. 2
- a schematic view of a second thread feeding device.
In Fig. 1 ist ein Nadelbett 10 einer sonst nicht näher dargestellten
Flachstrickmaschine dargestellt, zu dem mittels eines
Fadenführers FF ein Faden geringerer Elastizität 11 sowie ein
Faden höherer Elastizität 12 zugeführt werden. Der Faden geringerer
Elastizität 11 wird von einer Spule 13 abgezogen und
über einen Fadenspanner 14 sowie eine Messeinrichtung 15 dem
Fadenführer FF über mehrere Umlenkrollen U1 bis U7 zugeführt.
Die Messeinrichtung 15 misst ständig die für eine Masche benötigte
Länge des Fadens geringerer Elastizität 11 und übermittelt
diese Größe über eine Datenleitung 16 zu einer
Rechen- und Steuereinheit 17, die über eine Datenleitung 18
außerdem mit einer Maschinensteuereinheit 19 der Flachstrickmaschine
sowie über eine Steuerleitung 20 mit einer Fördervorrichtung
21 für den Faden höherer Elastizität 12 verbunden
ist. Neben der Information über die zugeführte Länge des
Fadens geringerer Elastizität 11 empfängt die Rechen- und
Steuereinheit 17 von der Maschinensteuereinheit 19 Informationen
über die Materialeigenschaften des Fadens höherer Elastizität
12 und berechnet daraus die zuzuführende Länge des
Fadens höherer Elastizität 12 und steuert dementsprechend
einen Elektromotor 22 der Fördervorrichtung 21 für den Faden
höherer Elastizität 12 an. Der Motor 22 treibt zwei Förderwalzen
23 gleichen Durchmessers an, auf denen eine Spule 24 mit
dem Faden höherer Elastizität 12 mit ihrem Umfang aufliegt. Je
nach der Umfangsgeschwindigkeit der Förderwalzen 23 wird mehr
oder weniger des Fadens höherer Elastizität 12 dem Fadenführer
FF zugeführt. Dabei wird der Faden höherer Elastizität 12
direkt von der Spule 24 ohne weitere Fadenspanneinrichtungen
oder dergleichen dem Fadenführer FF zugeleitet. Es ist lediglich
noch ein Sensor 25 zur Erkennung von Fadenbrüchen in der
Fadenzuleitung vorgesehen. In Fig. 1, a
Im Gegensatz zur Vorrichtung nach Fig. 1 ist bei der Zuführvorrichtung
nach Fig. 2 keine Messeinrichtung 15 zur Messung
der zugeführten Länge des Fadens geringerer Elastizität 11
vorgesehen. Hier erhält die Rechen- und Steuereinheit 17 neben
den Daten über die Garneigenschaften des Fadens höherer Elastizität
12 von einer Maschinensteuereinheit 19' auch Informationen
über die jeweiligen Maschengrößen des Fadens geringerer
Elastizität 11, die Maschenfolge und die Anzahl der Maschen in
der Strickreihe sowie über die Strickrichtung. Daraus berechnet
die Rechen- und Steuereinheit 17 die zuzuführende Länge
des Fadens höherer Elastizität 12 und steuert dementsprechend
die Fördervorrichtung 21 für den Faden höherer Elastizität 12
an. Aus den Daten über die Garneigenschaften des Fadens höherer
Elastizität 12 wird dabei ein Minderungsfaktor berechnet,
mit dem die zugeführte Länge des Fadens geringerer Elastizität
11 multipliziert wird, um die zuzuführende Länge des Fadens
höherer Elastizität 12 zu erhalten. Aus der Strickrichtungsangabe
erkennt die Rechen- und Steuereinheit 17, ob sich der
Fadenführer FF des Fadens höherer Elastizität 12 von der Fördervorrichtung
21 weg oder auf diese zu bewegt, und kann somit
die Fadenmenge bei der Bewegung des Fadenführers FF von der
Fördervorrichtung 21 weg vergrößern und bei der Bewegung auf
die Fördervorrichtung 21 zu verkleinern. Dadurch ist gewährleistet,
dass der Faden höherer Elastizität 12 stets die optimale
Fadenspannung aufweist. Beim Faden geringerer Elastizität
11 sorgt der Fadenspanner 14 für eine konstante Fadenspannung.In contrast to the device according to FIG. 1, the feed device
2 no measuring
Claims (12)
- Method of producing a knitted fabric on a flat knitting machine with the simultaneous supply of two yarns having different elasticity (11, 12) to needles of the flat knitting machine, characterised in that the length of the yarn having higher elasticity (12) to be supplied to a needle for each stitch to be formed is calculated from the length of the yarn having lower elasticity (11) supplied and from data about the material properties of the yarn having higher elasticity (12) and a feeding device (21) for the yarn having higher elasticity (12) is controlled in accordance with the calculated length of yarn to be supplied.
- Method according to claim 1, characterised in that a reduction factor is calculated from the data about the material properties of the yarn having higher elasticity (12) and the length of the yarn having lower elasticity (11) is multiplied by this reduction factor in order to obtain the length of the yarn having higher elasticity (12) to be supplied.
- Method according to claim 2, characterised in that more yarn having higher elasticity (12) is supplied when the direction of carriage travel is away from the feeding device (21) for the yarn having higher elasticity (12) than when the direction of carriage travel is towards the feeding device (21).
- Method according to one of claims 1 to 3, characterised in that the length of the yarn having lower elasticity (11) supplied is determined by a measuring device (15).
- Method according to one of claims 1 to 3, characterised in that the length of the yarn having lower elasticity (11) supplied is calculated from data about the respective stitch size of the yarn having lower elasticity (11), the stitch sequence and the number of stitches in the respective row provided by a machine control unit (19').
- Method according to one of claims 1 to 5, characterised in that the two yarns having different elasticity (11, 12) are supplied to a common yarn guide (FF).
- Flat knitting machine comprising at least one needle bed (10) for carrying out a method according to the pre-characterising part of the claim, characterised by a bobbin (13) for the yarn having lower elasticity (11), a feeding device (21) for the yarn having higher elasticity (12), at least one yarn guide (FF) for the two yarns having different elasticity (11, 12), a machine control unit (19, 19') and an arithmetic and control unit (17) for determining the length of the yarn having higher elasticity (12) to be supplied and for controlling the feeding device (21) for the yarn having higher elasticity (12).
- Flat knitting machine according to claim 7, characterised in that the feeding device (21) has two parallel feed rolls (23) having the same diameter and driven in the same direction, on which a bobbin (24) with the yarn having higher elasticity (12) rests by means of its circumference.
- Flat knitting machine according to claim 7 or claim 8, characterised in that the feeding device (21) has an electric motor (22) coupled to the arithmetic and control unit (17).
- Flat knitting machine according to one of claims 7 to 9, characterised in that a yarn tensioner (14) is arranged between the bobbin (13) for the yarn having lower elasticity (11) and the yarn guide (FF).
- Flat knitting machine according to one of claims 7 to 10, characterised in that a yarn-length measuring device (15) is arranged between the bobbin (13) for the yarn having lower elasticity (11) and the at least one yarn guide (FF) and is coupled to the arithmetic and control unit (17).
- Flat knitting machine according to one of claims 7 to 11, characterised in that a yarn-break sensor (25) is provided for the yarn having higher elasticity (12).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19801643 | 1998-01-17 | ||
| DE19801643A DE19801643A1 (en) | 1998-01-17 | 1998-01-17 | Flatbed knitter to knit a hosiery stretch fabric |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0936294A2 EP0936294A2 (en) | 1999-08-18 |
| EP0936294A3 EP0936294A3 (en) | 2000-04-05 |
| EP0936294B1 true EP0936294B1 (en) | 2003-03-19 |
Family
ID=7854910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98123873A Expired - Lifetime EP0936294B1 (en) | 1998-01-17 | 1998-12-16 | Method for making knitwear on a flat bed knitting machine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6170301B1 (en) |
| EP (1) | EP0936294B1 (en) |
| CN (1) | CN1265046C (en) |
| DE (2) | DE19801643A1 (en) |
| ES (1) | ES2190566T3 (en) |
| HK (1) | HK1021554A1 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10013776A1 (en) * | 2000-03-20 | 2001-10-11 | Iro Patent Ag Baar | Method of inserting an elastomer thread and thread processing system |
| DE10032705B4 (en) * | 2000-07-05 | 2006-11-16 | Memminger-Iro Gmbh | Thread delivery device for textile machines |
| FR2839321B1 (en) * | 2002-05-03 | 2005-05-27 | Europ De La Maille Et Des Tiss | METHOD AND DEVICE FOR KNITTING TUBULAR ARTICLES INCLUDING AN ELASTIC FIBER, AND ARTICLE PRODUCED THEREBY |
| US6640591B1 (en) * | 2002-11-12 | 2003-11-04 | Eugene Haban | Apparatus and method for production of fabrics |
| CZ301577B6 (en) * | 2003-04-15 | 2010-04-21 | UNIPLET TREBÍC, a.s. | Method and device of controlling elastic thread |
| JP4015984B2 (en) * | 2003-10-17 | 2007-11-28 | 株式会社島精機製作所 | Yarn supply device for flat knitting machine |
| ITFI20040113A1 (en) * | 2004-05-14 | 2004-08-13 | Giovanni Corsani | WIRE FEEDER DEVICE |
| JP4336303B2 (en) * | 2004-12-16 | 2009-09-30 | 株式会社島精機製作所 | Yarn feeder for flat knitting machine |
| ITTO20050469A1 (en) * | 2005-07-07 | 2007-01-08 | L G L Elecrtronics S P A | YARN RECOVERY DEVICE FOR TEXTILE MACHINES |
| JP4943803B2 (en) * | 2006-10-12 | 2012-05-30 | 株式会社島精機製作所 | Tension setting method in knitting machine and knitting machine |
| JP4943932B2 (en) * | 2007-04-27 | 2012-05-30 | 株式会社島精機製作所 | Knitting machine equipped with elastic yarn feeding function |
| EP2441868B1 (en) * | 2009-06-09 | 2015-10-21 | Shima Seiki Mfg. Ltd. | Yarn feeding device and yarn feeding method for knitting machine |
| CN103015021B (en) * | 2012-12-31 | 2015-01-21 | 加宝利服装有限公司 | Process, equipment and system for weaving Fabric |
| CN114892329B (en) * | 2022-05-06 | 2023-06-27 | 江阴市傅博纺织有限公司 | Elasticity-controllable tatting-simulated serge knitted fabric and production method thereof |
| CN115231391A (en) * | 2022-08-09 | 2022-10-25 | 上海崇湛智能科技有限公司 | A bundling machine for macromolecular material |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1893808A (en) * | 1930-08-22 | 1933-01-10 | Gropper Sport Apparel Co Inc | Yarn carrier for knitting machines |
| US3861176A (en) * | 1973-04-09 | 1975-01-21 | Pharr Yarns Inc | Apparatus for twisting together and knitting yarns |
| DE2831180A1 (en) * | 1978-07-15 | 1980-01-24 | Bayer Ag | Length determination of knitted fabric under constant tension - produced by rollers of constant speed and constant torque |
| DE3524220A1 (en) * | 1985-07-06 | 1987-01-08 | Stoll & Co H | Monitoring device in the thread run-off system of a flat knitting machine |
| DE3609719A1 (en) * | 1986-03-21 | 1987-10-01 | Schieber Universal Maschf | METHOD AND DEVICE FOR INFLUENCING THE LENGTH AND THE MESH DESIGN OF KNITTED PIECES |
| SE8701876D0 (en) * | 1987-05-05 | 1987-05-05 | Iro Ab | PROCEDURE AND SYSTEM FOR POSITIVE FEEDING OF AN ELASTIC YARN TO A YARN-CONTAINING MACHINE WITH VARIOUS (INTERMITTENT) YARN CONSUMPTION, PREFERRED TO A SOCKET KNITTING MACHINE |
| DE8912962U1 (en) * | 1988-11-21 | 1990-01-25 | Henkel KGaA, 40589 Düsseldorf | Device for measuring the change in length and/or the rate of change in length of a thread-like, ribbon-like or film-like measuring object |
| DE4032402A1 (en) * | 1990-10-12 | 1992-04-16 | Menninger Iro Gmbh | Knitter yarn feed - has controlled yarn retraction to form a yarn reserve during a temporary break in the knitting e.g. slide direction change |
| IT1255465B (en) * | 1992-07-28 | 1995-11-02 | Tiziano Barea | DEVICE TO CONTROL THE FEEDING OF AT LEAST ONE WIRE TO A TEXTILE MACHINE IN ORDER TO COMPENSATE FOR TEARS AND OVERVOLTAGES EXERCISED ON THE SAME WIRE |
| DE19537325C1 (en) * | 1995-10-06 | 1996-11-28 | Memminger Iro Gmbh | Yarn feed tension control on flat bed knitting machine |
| WO1997013904A1 (en) * | 1995-10-12 | 1997-04-17 | E.I. Du Pont De Nemours And Company | Process and apparatus for knitting fabric with non-elastic yarn and bare elastomeric yarn and sweater knit fabric construction |
-
1998
- 1998-01-17 DE DE19801643A patent/DE19801643A1/en not_active Withdrawn
- 1998-12-16 EP EP98123873A patent/EP0936294B1/en not_active Expired - Lifetime
- 1998-12-16 ES ES98123873T patent/ES2190566T3/en not_active Expired - Lifetime
- 1998-12-16 DE DE59807554T patent/DE59807554D1/en not_active Expired - Fee Related
-
1999
- 1999-01-13 US US09/231,865 patent/US6170301B1/en not_active Expired - Fee Related
- 1999-01-15 CN CNB991010957A patent/CN1265046C/en not_active Expired - Fee Related
-
2000
- 2000-01-27 HK HK00100511A patent/HK1021554A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE59807554D1 (en) | 2003-04-24 |
| US6170301B1 (en) | 2001-01-09 |
| CN1224086A (en) | 1999-07-28 |
| EP0936294A3 (en) | 2000-04-05 |
| EP0936294A2 (en) | 1999-08-18 |
| DE19801643A1 (en) | 1999-07-22 |
| HK1021554A1 (en) | 2000-06-16 |
| ES2190566T3 (en) | 2003-08-01 |
| CN1265046C (en) | 2006-07-19 |
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