EP3643823B1 - Warp knitting machine compound needle - Google Patents

Warp knitting machine compound needle Download PDF

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Publication number
EP3643823B1
EP3643823B1 EP18202715.1A EP18202715A EP3643823B1 EP 3643823 B1 EP3643823 B1 EP 3643823B1 EP 18202715 A EP18202715 A EP 18202715A EP 3643823 B1 EP3643823 B1 EP 3643823B1
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EP
European Patent Office
Prior art keywords
compound needle
hook
edge profiling
compound
needle
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.)
Active
Application number
EP18202715.1A
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German (de)
French (fr)
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EP3643823A1 (en
Inventor
Klaus Brandl
Kay Obmann
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Karl Mayer Stoll R&D GmbH
Original Assignee
Karl Mayer Stoll R&D GmbH
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Publication date
Application filed by Karl Mayer Stoll R&D GmbH filed Critical Karl Mayer Stoll R&D GmbH
Priority to EP18202715.1A priority Critical patent/EP3643823B1/en
Priority to ES18202715T priority patent/ES2890929T3/en
Priority to CN201910141986.7A priority patent/CN111101288B/en
Priority to TW108128759A priority patent/TWI766180B/en
Priority to KR1020190125780A priority patent/KR102285359B1/en
Publication of EP3643823A1 publication Critical patent/EP3643823A1/en
Application granted granted Critical
Publication of EP3643823B1 publication Critical patent/EP3643823B1/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
    • D04B35/08—Spring or bearded needles
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
    • D04B35/06—Sliding-tongue needles
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B27/00—Details of, or auxiliary devices incorporated in, warp knitting machines, restricted to machines of this kind
    • D04B27/06—Needle bars; Sinker bars
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
    • D04B35/04—Latch needles

Definitions

  • the present invention relates to a warp knitting machine compound needle according to the preamble of claim 1.
  • Such a warp knitting machine compound needle is off DE 43 44 375 C1 known.
  • a warp knitting machine compound needle for example, is off DE 25 37 502 A1 known.
  • the compound needles In the operation of a warp knitting machine, the compound needles have to absorb forces during the loop formation.
  • the compound needles are made, for example, by laying the threads on a lateral bend the thread pull and the fabric take-off in the longitudinal and transverse direction and by the rise of the compound needle, in which the compound needle forms a loop that has to slip from the area of the hook onto the shaft, to compression in the longitudinal axis.
  • the compound needles are z. B. made by punching from sheet metal or by striking from a wire. After punching, the punch burrs must be eliminated, which can be done, for example, by vibratory grinding. All sharp edges are rounded off a bit.
  • the loads on the compound needle described above also depend, among other things, on the threads that are used to manufacture a knitted fabric. In general, the more inflexible these threads are, the greater the loads. For example, if a mosquito net is to be made, then a monofilament that is relatively stiff is used for the threads. Even with a relatively small fineness, the loads on the compound needle are so great during operation of the warp knitting machine that more and more malfunctions occur that can even break the compound needle.
  • the invention is based on the object of being able to operate a warp knitting machine reliably even with threads that are difficult to process.
  • the structure of the compound needle can therefore basically be left unchanged.
  • the compound needle can be made reinforced up to a certain limit in order to be able to absorb the loads caused by the threads to be processed.
  • the compound needle is specifically provided with a predetermined one Edge profiling, which can be produced, for example, by a machining step. Alternatively, the edge profiling can also be produced by pressing.
  • Edge profiling makes it possible for the loop formed on the hook to slip more easily onto the shaft when the compound needle rises.
  • the transition area has a cross section that increases from the hook towards the shaft. In parallel with this enlargement of the cross section, the curvature of the edge profiling also increases in a direction away from the hook, so that the transition area becomes increasingly "angular". However, a sharp corner does not actually form.
  • the edge profiling is designed as a rounding. This further facilitates the movement of the loop from the hook onto the shaft.
  • edge profiling can be designed as a bevel. A mixture of rounding and chamfering is possible. The increasing curvature then corresponds to a decreasing bevel width.
  • a ratio between an area, which is determined by a width and a depth of the transition area, and a cross-sectional area of the transition area from the hook to the shaft increases. This condition applies at every distance from the hook. In other words, the edge profiling leaves a larger area of the surface, which is determined by the width and depth of the transition area, free the closer you get to the hook.
  • the width is the direction in which the compound needles in the bar of the warp knitting machine are arranged side by side.
  • the depth is a direction perpendicular to and perpendicular to the longitudinal extent of the compound needle.
  • the ratio at a first end of the transition region which is adjacent to the hook is preferably a maximum of 0.8.
  • the actual cross-sectional area of the transition area takes up only 80% of the area that would be available in and of itself through the product of the width and depth of the transition area.
  • the ratio at a second end of the transition region, which is adjacent to the shaft is at least 0.85.
  • the edge profiling has the effect that a maximum of 15% of the area which is determined by the width and depth of the transition area is not covered by the cross-section of the transition area.
  • a front side of the compound needle preferably has a first edge profile and a rear side of the compound needle has a second edge profile, the first edge profile and the second edge profile being designed differently. This takes into account the fact that a groove is formed on the front side of the compound needle, in which the slide moves when the warp knitting machine is in operation.
  • the first edge profiling preferably has a largest first radius of curvature which is smaller than a thickness of a wall which delimits a slide groove. This ends the edge profiling before it reaches the slide groove. The geometry of the slide groove can therefore be retained unchanged.
  • the second edge profiling has a largest second radius of curvature which is in the range of 10% to 30% of a width of the compound needle.
  • the largest second radius of curvature is therefore relatively large.
  • edge profiling continues in the shaft. For example, it can run out in the shaft, so it does not have to stop immediately at the end of the transition area.
  • edge profiling is limited to a loop formation area of the compound needle.
  • the loop formation area basically corresponds to the stroke or the stroke height of the compound needle when the warp knitting machine is in operation. Any additional edge profiling is not required.
  • Figures 1a and 2a show the compound needle from the left behind while the Figures 1b and 2b show the compound needle from the front right.
  • a warp knitting machine compound needle 1 has a needle head 2 with a hook 3.
  • a transition area 4 adjoins the hook 3, the cross section of which increases in a direction away from the needle head 2.
  • a shaft 5 adjoins the transition region 4, at the end of which facing away from the needle head 2 a needle butt 6 is arranged.
  • the shaft 5 has an ingot support surface 7 adjacent to the needle butt 6.
  • Fig. 1a shows a back 8 of the needle while Figure 1b shows a face 9 of the needle.
  • a slide groove 10 is formed in the front side 9. The slide groove serves to receive a slide during operation of the warp knitting machine, with which a catching space 11 is closed when the needle pulls a thread through a stitch that was previously formed on a stitch-forming area 12 during a stitch-forming process.
  • the cross section of the transition area 4 increases from the needle head 2 to the shaft 5. Accordingly, a stitch that has formed in the area of the needle head 2 has to widen when the compound needle 1 rises for the next stitch-forming process in order to in turn pull a warp thread through the stitch previously formed on the compound needle. This is well known.
  • compound needle 1 In the case of threads that are difficult to process because they are relatively stiff, for example, large forces act on compound needle 1 during such a loop formation process. By laying the threads, compound needles 1 are subjected to lateral bending, i.e. in the width direction.
  • the compound needles Due to the thread pull and the fabric take-off, the compound needles are loaded in the longitudinal and depth directions. Due to the shape of the compound needle 1, the compound needle 1 is subjected to compression in the longitudinal axis as it ascends through the mesh sliding from the needle head 2 onto the shaft 5.
  • the process material that is to say the thread or the stitch that is formed, is also heavily stressed when climbing, since the stitch has to slip from the needle head 2 onto the shaft 5 and is greatly expanded in the process. This expansion can be up to three times the size of the mesh.
  • This stress can only be absorbed to a limited extent by reinforcing the compound needle 1.
  • a reinforcement of the width of the compound needle 1, i.e. a reinforcement parallel to the bar support surface 7, is only possible to a limited extent because the thickness of the compound needle 1 that can be influenced by such reinforcement is often already determined by the fineness, i.e. the number of compound needles per inch.
  • a reinforcement in the depth direction, that is to say in the direction between the rear side 8 and the front side 9, is likewise only possible to a limited extent.
  • the transition between the needle head 2 and the shaft 5 cannot be made over a very short distance, because then the loop would have to be widened too quickly.
  • the compound needle 1 is provided with an edge profile which changes continuously between the hook 3, that is to say the needle head 2 and the shaft 5. This continuous change does not have to take place continuously over the entire distance between the needle head 2 and the shaft 5. However, it should take place in the loop-forming area 12 in which the loop has to widen during operation.
  • This part extends from the needle head 2 to approximately a position 13. The position 13 can, however, vary with different types of compound needles 1 are also located in different places.
  • the loop-forming part 12 usually has a length of 7 mm to 17 mm.
  • the edge profile is composed of a first edge profile 14 on the front side 9 of the compound needle 1 and a second edge profile 15 on the rear side 8 of the compound needle 1.
  • the first edge profile 14 and the second edge profile 15 are designed differently.
  • the first edge profile 14 and / or the second edge profile 15 is formed as a rounding.
  • the rounding can follow a circular line in the cross-section, even if this is not absolutely necessary.
  • the circular line is used for the purpose of simplifying the explanation.
  • a radius of curvature can be defined here.
  • the edge profiles 14, 15 each have roundings, the special feature here being that each rounding has a curvature increasing away from the hook 3. In relation to a circular curvature, this means that the radius of curvature decreases in a direction away from the needle head 2.
  • first edge profile 14 and the second edge profile 15 can also be designed as a bevel. It is also possible to design one of the edge profiles 14, 15 as a rounding and the other edge profile 14, 15 as a bevel or to have a rounding transition into a bevel or vice versa in one or both edge profiles 14, 15.
  • the increasing radius of curvature then corresponds to a decreasing width of the chamfer, i.e. H. the edge profiling is then "sharper".
  • This area can be related to the cross-sectional area of the transition area 4 at the same position. This ratio now increases from the hook 3 to the shaft 5.
  • the ratio at a first end of the transition region 4 that is adjacent to the hook 3 can be a maximum of 0.8, i. H. the cross-sectional area is 80% of the area defined by the product of width and depth. At the other end of the transition region 4, the ratio can be at least 0.85, i. H. here the cross-sectional area takes up at least 85% of the area formed by the product of width and depth.
  • the second profile 15 on the rear side 8 has a smaller curvature, that is to say a larger radius of curvature, than the first edge profile 14 on the front side 9 of the compound needle 1.
  • the radius of curvature of the first edge profile is limited, among other things, by the slide groove 10.
  • the slide groove 10 is formed between two walls 18, 19.
  • the first edge profiling 14 each has a largest first radius of curvature which is smaller than a thickness of the wall 18, 19 which delimits the slide groove 10.
  • the second edge profiling has a largest second radius of curvature which is in the range of 10% to 30% of the width of the compound needle 1, that is to say the distance between the left side flank 16 and the right side flank 17.
  • edge profiles 14, 15 can continue in the shaft 5. As stated above, however, it is sufficient if the edge profiles 14, 15 are limited to the loop formation area 12 of the compound needle 1.
  • the hook 3 often has a circular cross section. At least the hook 3 also has an edge profile with a corresponding curvature. It can now be ensured that the first edge profiling 14 and above all also the second edge profiling 15 continuously merge into the hook 3.
  • Fig. 3 shows a side view of the compound needle 1, in which two sectional views CC and DD can be seen.
  • Figure 3b shows a sectional view of the compound needle 1 along the line CC.
  • Figure 3c shows the sectional view of the compound needle 1 along the line DD. The change in the edge profile is achieved by comparing Figure 3b With Figure 3c clearly visible.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Description

Die vorliegende Erfindung betrifft eine Kettenwirkmaschinen-Schiebernadel nach dem Oberbegriff des Anspruchs 1.The present invention relates to a warp knitting machine compound needle according to the preamble of claim 1.

Eine derartige Kettenwirkmaschinen-Schiebernadel ist aus DE 43 44 375 C1 bekannt.Such a warp knitting machine compound needle is off DE 43 44 375 C1 known.

Eine Kettenwirkmaschinen-Schiebernadel ist beispielsweise aus DE 25 37 502 A1 bekannt.A warp knitting machine compound needle, for example, is off DE 25 37 502 A1 known.

Im Betrieb einer Kettenwirkmaschine müssen die Schiebernadeln während der Maschenbildung Kräfte aufnehmen. Die Schiebernadeln werden beispielsweise durch die Verlegung der Fäden auf seitliche Biegung, durch den Fadenzug und den Warenabzug in Längs- und Querrichtung und durch das Steigen der Schiebernadel, bei dem die Schiebernadel eine Masche bildet, die aus dem Bereich des Hakens auf den Schaft rutschen muss, auf Stauchung in der Längsachse belastet.In the operation of a warp knitting machine, the compound needles have to absorb forces during the loop formation. The compound needles are made, for example, by laying the threads on a lateral bend the thread pull and the fabric take-off in the longitudinal and transverse direction and by the rise of the compound needle, in which the compound needle forms a loop that has to slip from the area of the hook onto the shaft, to compression in the longitudinal axis.

Die Schiebernadeln werden z. B. durch Stanzen aus Blech oder durch Schlagen aus einem Draht hergestellt. Nach dem Stanzen müssen die Stanzgrate beseitigt werden, was beispielsweise durch ein Gleitschleifen erfolgen kann. Dabei werden auch alle scharfen Kanten etwas abgerundet.The compound needles are z. B. made by punching from sheet metal or by striking from a wire. After punching, the punch burrs must be eliminated, which can be done, for example, by vibratory grinding. All sharp edges are rounded off a bit.

Die oben geschilderten Belastungen der Schiebernadel hängen unter anderem auch von den Fäden ab, die zur Herstellung einer Wirkware verwendet werden. Je unflexibler diese Fäden sind, desto größer sind im Allgemeinen die Belastungen. Wenn beispielsweise ein Moskitonetz hergestellt werden soll, dann wird ein Monofilament für die Fäden verwendet, dass relativ steif ist. Die Belastungen der Schiebernadel sind auch bei einer relativ kleinen Feinheit dann im Betrieb der Kettenwirkmaschine so groß, dass es vermehrt zu Störungen kommt, die bis zum Bruch der Schiebernadel reichen können.The loads on the compound needle described above also depend, among other things, on the threads that are used to manufacture a knitted fabric. In general, the more inflexible these threads are, the greater the loads. For example, if a mosquito net is to be made, then a monofilament that is relatively stiff is used for the threads. Even with a relatively small fineness, the loads on the compound needle are so great during operation of the warp knitting machine that more and more malfunctions occur that can even break the compound needle.

Der Erfindung liegt die Aufgabe zu Grunde, eine Kettenwirkmaschine auch bei schwer zu verarbeitenden Fäden zuverlässig betreiben zu können.The invention is based on the object of being able to operate a warp knitting machine reliably even with threads that are difficult to process.

Diese Aufgabe wird bei einer Kettenwirkmaschinen-Schiebernadel der eingangs genannten Art mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved with a warp knitting machine compound needle of the type mentioned at the beginning with the features of claim 1.

Die Schiebernadel kann also in ihrem Aufbau grundsätzlich unverändert belassen werden. Insbesondere kann man die Schiebernadel bis zu einer gewissen Grenze verstärkt ausführen, um die Belastungen, die durch die zu verarbeitenden Fäden hervorgerufen werden, aufnehmen zu können. Man versieht die Schiebernadel aber gezielt mit einer vorbestimmten Kantenprofilierung, die beispielsweise durch einen spanenden Bearbeitungsschritt erzeugt werden kann. Alternativ dazu kann man die Kantenprofilierung auch durch Pressen erzeugen. Durch die Kantenprofilierung kann man erreichen, dass die am Haken gebildete Masche leichter auf den Schaft rutschen kann, wenn die Schiebernadel steigt. Der Übergangsbereich weist einen Querschnitt auf, der sich vom Haken zum Schaft hin vergrößert. Parallel zu dieser Vergrößerung des Querschnitts nimmt auch die Krümmung der Kantenprofilierung in eine Richtung vom Haken weg zu, so dass der Übergangsbereich zunehmend "eckig" wird. Eine scharfe Ecke bildet sich tatsächlich aber nicht aus.The structure of the compound needle can therefore basically be left unchanged. In particular, the compound needle can be made reinforced up to a certain limit in order to be able to absorb the loads caused by the threads to be processed. The compound needle is specifically provided with a predetermined one Edge profiling, which can be produced, for example, by a machining step. Alternatively, the edge profiling can also be produced by pressing. The edge profiling makes it possible for the loop formed on the hook to slip more easily onto the shaft when the compound needle rises. The transition area has a cross section that increases from the hook towards the shaft. In parallel with this enlargement of the cross section, the curvature of the edge profiling also increases in a direction away from the hook, so that the transition area becomes increasingly "angular". However, a sharp corner does not actually form.

Die Kantenprofilierung ist als Rundung ausgebildet. Damit wird die Bewegung der Masche vom Haken auf den Schaft weiter erleichtert.The edge profiling is designed as a rounding. This further facilitates the movement of the loop from the hook onto the shaft.

Zusätzlich kann die Kantenprofilierung als Fase ausgebildet sein. Eine Mischung aus Rundung und Fase ist möglich. Die zunehmende Krümmung entspricht dann einer abnehmenden Fasenbreite.In addition, the edge profiling can be designed as a bevel. A mixture of rounding and chamfering is possible. The increasing curvature then corresponds to a decreasing bevel width.

In einer bevorzugten Ausgestaltung vergrößert sich ein Verhältnis zwischen einer Fläche, die durch eine Breite und eine Tiefe des Übergangsbereichs bestimmt wird, und einer Querschnittsfläche des Übergangsbereichs vom Haken zum Schaft. Diese Bedingung gilt an jeder Entfernung vom Haken. Mit anderen Worten lässt die Kantenprofilierung einen größeren Bereich der Fläche, die durch die Breite und die Tiefe des Übergangsbereichs bestimmt wird, frei, je näher man dem Haken kommt. Die Breite ist dabei die Richtung, in der die Schiebernadeln in der Barre der Kettenwirkmaschine nebeneinander angeordnet sind. Die Tiefe ist eine Richtung senkrecht dazu und senkrecht zu der Längserstreckung der Schiebernadel.In a preferred embodiment, a ratio between an area, which is determined by a width and a depth of the transition area, and a cross-sectional area of the transition area from the hook to the shaft increases. This condition applies at every distance from the hook. In other words, the edge profiling leaves a larger area of the surface, which is determined by the width and depth of the transition area, free the closer you get to the hook. The width is the direction in which the compound needles in the bar of the warp knitting machine are arranged side by side. The depth is a direction perpendicular to and perpendicular to the longitudinal extent of the compound needle.

Vorzugsweise beträgt das Verhältnis an einem ersten Ende des Übergangsbereichs, das dem Haken benachbart ist, maximal 0,8. Mit anderen Worten nimmt die tatsächliche Querschnittsfläche des Übergangsbereichs nur 80 % der Fläche in Anspruch, die an und für sich durch das Produkt aus Breite und Tiefe des Übergangsbereichs verfügbar wäre.The ratio at a first end of the transition region which is adjacent to the hook is preferably a maximum of 0.8. In other words, the actual cross-sectional area of the transition area takes up only 80% of the area that would be available in and of itself through the product of the width and depth of the transition area.

Auch ist von Vorteil, dass das Verhältnis an einem zweiten Ende des Übergangsbereichs, das dem Schaft benachbart ist, mindestens 0,85 beträgt. Hier bewirkt die Kantenprofilierung, dass maximal 15 % der Fläche die durch die Breite und die Tiefe des Übergangsbereichs bestimmt ist, nicht vom Querschnitt des Übergangsbereich abgedeckt ist.It is also advantageous that the ratio at a second end of the transition region, which is adjacent to the shaft, is at least 0.85. Here, the edge profiling has the effect that a maximum of 15% of the area which is determined by the width and depth of the transition area is not covered by the cross-section of the transition area.

Vorzugsweise weist eine Vorderseite der Schiebernadel eine erste Kantenprofilierung auf und eine Rückseite der Schiebernadel weist eine zweite Kantenprofilierung auf, wobei die erste Kantenprofilierung und die zweite Kantenprofilierung unterschiedlich ausgebildet sind. Damit trägt man der Tatsache Rechnung, dass an der Vorderseite der Schiebernadel eine Nut ausgebildet ist, in der sich im Betrieb der Kettenwirkmaschine der Schieber bewegt.A front side of the compound needle preferably has a first edge profile and a rear side of the compound needle has a second edge profile, the first edge profile and the second edge profile being designed differently. This takes into account the fact that a groove is formed on the front side of the compound needle, in which the slide moves when the warp knitting machine is in operation.

Vorzugsweise weist die erste Kantenprofilierung einen größten ersten Krümmungsradius auf, der kleiner ist als eine Dicke einer Wand die eine Schiebernut begrenzt. Damit endet die Kantenprofilierung, bevor sie die Schiebernut erreicht. Die Geometrie der Schiebernut kann also unverändert beibehalten werden.The first edge profiling preferably has a largest first radius of curvature which is smaller than a thickness of a wall which delimits a slide groove. This ends the edge profiling before it reaches the slide groove. The geometry of the slide groove can therefore be retained unchanged.

In einer bevorzugten Ausgestaltung ist vorgesehen, dass die zweite Kantenprofilierung einen größten zweiten Krümmungsradius aufweist, der im Bereich von 10 % bis 30 % einer Breite der Schiebernadel liegt. Der größte zweite Krümmungsradius ist also relativ groß.In a preferred embodiment it is provided that the second edge profiling has a largest second radius of curvature which is in the range of 10% to 30% of a width of the compound needle. The largest second radius of curvature is therefore relatively large.

Auch ist von Vorteil, wenn sich die Kantenprofilierung in dem Schaft fortsetzt. Sie kann beispielsweise im Schaft auslaufen, muss also nicht unmittelbar mit dem Ende des Übergangsbereichs aufhören.It is also advantageous if the edge profiling continues in the shaft. For example, it can run out in the shaft, so it does not have to stop immediately at the end of the transition area.

Auch ist von Vorteil, dass die Kantenprofilierung auf einem Maschenbildungsbereich der Schiebernadel begrenzt ist. Der Maschenbildungsbereich entspricht im Grunde dem Hub oder der Hubhöhe der Schiebernadel im Betrieb der Kettenwirkmaschine. Eine darüberhinausgehende Kantenprofilierung ist nicht erforderlich.It is also advantageous that the edge profiling is limited to a loop formation area of the compound needle. The loop formation area basically corresponds to the stroke or the stroke height of the compound needle when the warp knitting machine is in operation. Any additional edge profiling is not required.

Die Erfindung wird im Folgenden anhand eines bevorzugten Ausführungsbeispiels in Verbindung mit der Zeichnung beschrieben. Hierin zeigen:

Fig. 1
eine perspektivische Darstellung einer Kettenwirkmaschinen-Schiebernadel aus zwei Blickrichtungen,
Fig. 2
eine vergrößerte Darstellung der Schiebernadel in den Bereichen A und B nach Fig. 1 zwischen Nadelkopf und Schaft und
Fig. 3
eine Seitenansicht und zwei Schnittansichten der Schiebernadel
The invention is described below using a preferred exemplary embodiment in conjunction with the drawing. Show here:
Fig. 1
a perspective view of a warp knitting machine compound needle from two directions of view,
Fig. 2
an enlarged view of the compound needle in areas A and B. Fig. 1 between needle head and shaft and
Fig. 3
a side view and two sectional views of the compound needle

In allen Figuren sind gleiche Elemente mit den gleichen Bezugszeichen versehen. Fig. 1a und 2a zeigen dabei die Schiebernadel von links hinten während die Figuren 1b und 2b die Schiebernadel von rechts vorne zeigen.In all figures, the same elements are provided with the same reference symbols. Figures 1a and 2a show the compound needle from the left behind while the Figures 1b and 2b show the compound needle from the front right.

Eine Kettenwirkmaschinen-Schiebernadel 1 weist einen Nadelkopf 2 mit einem Haken 3 auf.A warp knitting machine compound needle 1 has a needle head 2 with a hook 3.

An den Haken 3 schließt sich ein Übergangsbereich 4 an, dessen Querschnitt sich in eine Richtung vom Nadelkopf 2 weg vergrößert. An den Übergangsbereich 4 schließt sich ein Schaft 5 an, an dessen vom Nadelkopf 2 abgewandten Ende ein Nadelfuß 6 angeordnet ist. Der Schaft 5 weist benachbart zum Nadelfuß 6 eine Barrenauflagefläche 7 auf.A transition area 4 adjoins the hook 3, the cross section of which increases in a direction away from the needle head 2. A shaft 5 adjoins the transition region 4, at the end of which facing away from the needle head 2 a needle butt 6 is arranged. The shaft 5 has an ingot support surface 7 adjacent to the needle butt 6.

Fig. 1a zeigt eine Rückseite 8 der Nadel, während Fig. 1b eine Vorderseite 9 der Nadel zeigt. In der Vorderseite 9 ist eine Schiebernut 10 ausgebildet. Die Schiebernut dient dazu, im Betrieb der Kettenwirkmaschine einen Schieber aufzunehmen, mit dem ein Fangraum 11 geschlossen wird, wenn die Nadel bei einem Maschenbildungsvorgang einen Faden durch eine Masche zieht, die sich zuvor auf einem maschenbildenden Bereich 12 gebildet hat. Fig. 1a shows a back 8 of the needle while Figure 1b shows a face 9 of the needle. A slide groove 10 is formed in the front side 9. The slide groove serves to receive a slide during operation of the warp knitting machine, with which a catching space 11 is closed when the needle pulls a thread through a stitch that was previously formed on a stitch-forming area 12 during a stitch-forming process.

Wie man erkennen kann, nimmt der Querschnitt des Übergangsbereichs 4 vom Nadelkopf 2 zum Schaft 5 hin zu. Dementsprechend muss sich eine Masche, die sich im Bereich des Nadelkopfes 2 gebildet hat, weiten, wenn die Schiebernadel 1 für den nächsten Maschenbildungsvorgang steigt, um wiederrum einen Kettfaden durch die zuvor auf der Schiebernadel gebildete Masche zu ziehen. Dies ist allgemein bekannt.As can be seen, the cross section of the transition area 4 increases from the needle head 2 to the shaft 5. Accordingly, a stitch that has formed in the area of the needle head 2 has to widen when the compound needle 1 rises for the next stitch-forming process in order to in turn pull a warp thread through the stitch previously formed on the compound needle. This is well known.

Bei Fäden, die schwierig zu verarbeiten sind, weil sie beispielsweise relativ steif sind, wirken bei einem derartigen Maschenbildungsvorgang große Kräfte auf die Schiebernadel 1. Durch die Verlegung der Fäden werden die Schiebernadeln 1 auf seitliche Biegung, also in Breitenrichtung, belastet.In the case of threads that are difficult to process because they are relatively stiff, for example, large forces act on compound needle 1 during such a loop formation process. By laying the threads, compound needles 1 are subjected to lateral bending, i.e. in the width direction.

Durch den Fadenzug und den Warenabzug werden die Schiebernadeln in Längs- und Tiefenrichtung belastet. Durch die Form der Schiebernadel 1 wird die Schiebernadel 1 beim Steigen durch die vom Nadelkopf 2 auf den Schaft 5 rutschende Masche auf Stauchung in der Längsachse beansprucht. Auch das Prozessmaterial, also der Faden bzw. die sich bildende Masche, wird beim Steigen stark beansprucht, da die Masche vom Nadelkopf 2 auf den Schaft 5 rutschen muss und dabei stark aufgeweitet wird. Diese Aufweitung kann bis zum dreifachen der Größe der Masche führen.Due to the thread pull and the fabric take-off, the compound needles are loaded in the longitudinal and depth directions. Due to the shape of the compound needle 1, the compound needle 1 is subjected to compression in the longitudinal axis as it ascends through the mesh sliding from the needle head 2 onto the shaft 5. The process material, that is to say the thread or the stitch that is formed, is also heavily stressed when climbing, since the stitch has to slip from the needle head 2 onto the shaft 5 and is greatly expanded in the process. This expansion can be up to three times the size of the mesh.

Diese Beanspruchung lässt sich nur begrenzt durch eine Verstärkung der Schiebernadel 1 auffangen. Eine Verstärkung der Breite der Schiebernadel 1, also eine Verstärkung parallel zu der Barrenauflagefläche 7, ist nur begrenzt möglich, weil die durch eine derartige Verstärkung beeinflussbare Dicke der Schiebernadel 1 vielfach durch die Feinheit, also die Anzahl der Schiebernadeln pro Zoll, bereits festgelegt ist. Eine Verstärkung in Tiefenrichtung, also in die Richtung zwischen Rückseite 8 und Vorderseite 9, ist ebenfalls nur begrenzt möglich. Weiterhin kann man den Übergang zwischen dem Nadelkopf 2 und dem Schaft 5 nicht auf einer sehr kurzen Strecke vornehmen, weil dann die Masche zu schnell geweitet werden müsste.This stress can only be absorbed to a limited extent by reinforcing the compound needle 1. A reinforcement of the width of the compound needle 1, i.e. a reinforcement parallel to the bar support surface 7, is only possible to a limited extent because the thickness of the compound needle 1 that can be influenced by such reinforcement is often already determined by the fineness, i.e. the number of compound needles per inch. A reinforcement in the depth direction, that is to say in the direction between the rear side 8 and the front side 9, is likewise only possible to a limited extent. Furthermore, the transition between the needle head 2 and the shaft 5 cannot be made over a very short distance, because then the loop would have to be widened too quickly.

Man wählt nun einen anderen Weg, um die Belastung der Schiebernadel 1 beim Aufweiten der Masche klein zu halten. Man versieht die Schiebernadel 1 mit einer Kantenprofilierung, die sich zwischen dem Haken 3, also dem Nadelkopf 2 und dem Schaft 5 fortlaufend ändert. Diese fortlaufende Änderung muss dabei nicht durchgehend über die gesamte Strecke zwischen dem Nadelkopf 2 und dem Schaft 5 erfolgen. Sie sollte aber in dem maschenbildenden Bereich 12 erfolgen, in dem sich die Masche im Betrieb aufweiten muss. Dieser Teil erstreckt sich vom Nadelkopf 2 bis etwa zu einer Position 13. Die Position 13 kann sich allerdings bei unterschiedlichen Typen von Schiebernadeln 1 auch an unterschiedlichen Stellen befinden. Der maschenbildende Teil 12 hat üblicherweise eine Länge von 7 mm bis 17 mm.Another way is now chosen in order to keep the load on the compound needle 1 small when the mesh is widened. The compound needle 1 is provided with an edge profile which changes continuously between the hook 3, that is to say the needle head 2 and the shaft 5. This continuous change does not have to take place continuously over the entire distance between the needle head 2 and the shaft 5. However, it should take place in the loop-forming area 12 in which the loop has to widen during operation. This part extends from the needle head 2 to approximately a position 13. The position 13 can, however, vary with different types of compound needles 1 are also located in different places. The loop-forming part 12 usually has a length of 7 mm to 17 mm.

Die Kantenprofilierung setzt sich zusammen aus einer ersten Kantenprofilierung 14 an der Vorderseite 9 der Schiebernadel 1 und einer zweiten Kantenprofilierung 15 an der Rückseite 8 der Schiebernadel 1. Die erste Kantenprofilierung 14 und die zweite Kantenprofilierung 15 sind unterschiedlich ausgebildet.The edge profile is composed of a first edge profile 14 on the front side 9 of the compound needle 1 and a second edge profile 15 on the rear side 8 of the compound needle 1. The first edge profile 14 and the second edge profile 15 are designed differently.

Die erste Kantenprofilierung 14 und/oder die zweite Kantenprofilierung 15 wird als Rundung ausgebildet. Die Rundung kann im Querschnitt einer Kreislinie folgen, auch wenn dies nicht unbedingt erforderlich ist. Die Kreislinie wird zum Zwecke der Vereinfachung der Erläuterung verwendet. Hier lässt sich nämlich ein Krümmungsradius definieren. Allgemeiner ausgedrückt weisen die Kantenprofilierungen 14, 15 jeweils Rundungen auf, wobei die Besonderheit hier ist, dass jede Rundung jeweils eine vom Haken 3 weg zunehmende Krümmung aufweist. Bezogen auf eine kreislinienförmige Krümmung heißt dies, dass der Krümmungsradius in eine Richtung weg vom Nadelkopf 2 abnimmt.The first edge profile 14 and / or the second edge profile 15 is formed as a rounding. The rounding can follow a circular line in the cross-section, even if this is not absolutely necessary. The circular line is used for the purpose of simplifying the explanation. A radius of curvature can be defined here. In more general terms, the edge profiles 14, 15 each have roundings, the special feature here being that each rounding has a curvature increasing away from the hook 3. In relation to a circular curvature, this means that the radius of curvature decreases in a direction away from the needle head 2.

Zusätzlich zu einer Rundung können die erste Kantenprofilierung 14 und die zweite Kantenprofilierung 15 auch als Fase ausgebildet sein. Es ist auch möglich, eine der Kantenprofilierungen 14, 15 als Rundung und die andere Kantenprofilierung 14, 15 als Fase auszubilden oder in einer oder beiden Kantenprofilierungen 14, 15 eine Rundung in eine Fase oder umgekehrt übergehen zu lassen. Der zunehmende Krümmungsradius entspricht dann einer abnehmenden Breite der Fase, d. h. die Kantenprofilierung wird dann "schärfer".In addition to a rounding, the first edge profile 14 and the second edge profile 15 can also be designed as a bevel. It is also possible to design one of the edge profiles 14, 15 as a rounding and the other edge profile 14, 15 as a bevel or to have a rounding transition into a bevel or vice versa in one or both edge profiles 14, 15. The increasing radius of curvature then corresponds to a decreasing width of the chamfer, i.e. H. the edge profiling is then "sharper".

Man kann nun eine Fläche definieren, die durch ein Produkt aus einer Breite, also einen Abstand zwischen einer linken Seitenflanke 16 und einer rechten Seitenflanke 17, und einer Tiefe, also dem Abstand zwischen der Vorderseite 7 und der Rückseite 8, gebildet ist. Diese Fläche kann man in ein Verhältnis setzten durch die Querschnittsfläche des Übergangsbereichs 4 an der gleichen Position. Dieses Verhältnis vergrößert sich nun vom Haken 3 zum Schaft 5.You can now define an area by a product of a width, that is, a distance between a left side flank 16 and a right Side flank 17, and a depth, that is, the distance between the front 7 and the rear 8, is formed. This area can be related to the cross-sectional area of the transition area 4 at the same position. This ratio now increases from the hook 3 to the shaft 5.

So kann das Verhältnis an einem ersten Ende des Übergangsbereichs 4, dass dem Haken 3 benachbart ist, maximal 0,8 betragen, d. h. die Querschnittsfläche beträgt 80 % der durch Produkt aus Breite und Tiefe definierten Fläche. Am anderen Ende des Übergangsbereichs 4 kann das Verhältnis mindestens 0,85 betragen, d. h. hier nimmt die Querschnittsfläche mindestens 85 % der aus Produkt aus Breite und Tiefe gebildeten Fläche ein.For example, the ratio at a first end of the transition region 4 that is adjacent to the hook 3 can be a maximum of 0.8, i. H. the cross-sectional area is 80% of the area defined by the product of width and depth. At the other end of the transition region 4, the ratio can be at least 0.85, i. H. here the cross-sectional area takes up at least 85% of the area formed by the product of width and depth.

Wie man in der Zeichnung erkennen kann, weist die zweite Profilierung 15 an der Rückseite 8 eine kleinere Krümmung, also einen größeren Krümmungsradius, als die erste Kantenprofilierung 14 an der Vorderseite 9 der Schiebernadel 1 auf.As can be seen in the drawing, the second profile 15 on the rear side 8 has a smaller curvature, that is to say a larger radius of curvature, than the first edge profile 14 on the front side 9 of the compound needle 1.

Der Krümmungsradius der ersten Kantenprofilierung ist unter anderem durch die Schiebernut 10 begrenzt. Die Schiebernut 10 ist zwischen zwei Wänden 18, 19 ausgebildet. Die erste Kantenprofilierung 14 weist jeweils einen größten ersten Krümmungsradius auf, der kleiner ist als eine Dicke der Wand 18, 19, die die Schiebernut 10 begrenzt.The radius of curvature of the first edge profile is limited, among other things, by the slide groove 10. The slide groove 10 is formed between two walls 18, 19. The first edge profiling 14 each has a largest first radius of curvature which is smaller than a thickness of the wall 18, 19 which delimits the slide groove 10.

Die zweite Kantenprofilierung weist hingegen einen größten zweiten Krümmungsradius auf, der im Bereich von 10 % bis 30 % der Breite der Schiebernadel 1 liegt, also des Abstands zwischen der linken Seitenflanke 16 und der rechten Seitenflanke 17.The second edge profiling, on the other hand, has a largest second radius of curvature which is in the range of 10% to 30% of the width of the compound needle 1, that is to say the distance between the left side flank 16 and the right side flank 17.

In nicht näher dargestellter Weise können sich die Kantenprofilierungen 14, 15 in dem Schaft 5 fortsetzten. Wie oben ausgeführt, reicht es allerdings aus, wenn man die Kantenprofilierungen 14, 15 auf den Maschenbildungsbereich 12 der Schiebernadel 1 begrenzt.In a manner not shown in detail, the edge profiles 14, 15 can continue in the shaft 5. As stated above, however, it is sufficient if the edge profiles 14, 15 are limited to the loop formation area 12 of the compound needle 1.

Der Haken 3 weist vielfach einen kreisrunden Querschnitt auf. Zumindest weist der Haken 3 ebenfalls eine Kantenprofilierung mit einer entsprechenden Krümmung auf. Man kann nun dafür sorgen, dass die erste Kantenprofilierung 14 und vor allem auch die zweite Kantenprofilierung 15 stetig in den Haken 3 übergehen.The hook 3 often has a circular cross section. At least the hook 3 also has an edge profile with a corresponding curvature. It can now be ensured that the first edge profiling 14 and above all also the second edge profiling 15 continuously merge into the hook 3.

Fig. 3 zeigt eine Seitenansicht der Schiebernadel 1, in der zwei Schnittansichten C-C und D-D zu erkennen sind. Fig. 3b zeigt eine Schnittansicht der Schiebernadel 1 entlang der Linie C-C. Fig. 3c zeigt die Schnittansicht der Schiebernadel 1 entlang der Linie D-D. Die Änderung der Kantenprofilierung ist durch einen Vergleich von Fig. 3b mit Fig. 3c klar zu erkennen. Fig. 3 shows a side view of the compound needle 1, in which two sectional views CC and DD can be seen. Figure 3b shows a sectional view of the compound needle 1 along the line CC. Figure 3c shows the sectional view of the compound needle 1 along the line DD. The change in the edge profile is achieved by comparing Figure 3b With Figure 3c clearly visible.

Claims (10)

  1. Compound needle (1) for a warp knitting machine with a needle head (2), which has a hook (3), with a transition region (4) which adjoins the hook (3) and the cross section of which increases in a direction away from the needle head (2), and with a stem (5), wherein the transition region (4) has an edge profiling (14, 15) which changes continuously between the hook (3) and the stem (5), characterized in that the edge profiling (14, 15) is in the form of a rounding, wherein the rounding has a curvature which increases away from the hook (3).
  2. Compound needle according to Claim 1, characterized in that the edge profiling (14, 15) is in the form of a bevel.
  3. Compound needle according to one of Claims 1 or 2, characterized in that a ratio between a cross-sectional area of the transition region (4) and an area determined by a width and a depth of the transition region (4) increases from the hook (3) to the stem (5).
  4. Compound needle according to Claim 3, characterized in that the ratio at a first end of the transition region (4) that is adjacent to the hook (3) is at maximum 0.8.
  5. Compound needle according to Claim 3 or 4, characterized in that the ratio at a second end of the transition region (4) that is adjacent to the stem (5) is at least 0.85.
  6. Compound needle according to one of Claims 1 to 5, characterized in that a front side (9) of the compound needle (1) has a first edge profiling (14) and a rear side (8) of the compound needle (1) has a second edge profiling (15), wherein the first edge profiling (14) and the second edge profiling (15) differ in design.
  7. Compound needle according to Claim 6, characterized in that the first edge profiling (14) has a largest first radius of curvature which is smaller than a thickness of a wall (18, 19) which bounds a slider groove (10).
  8. Compound needle according to Claim 6 or 7, characterized in that the second edge profiling (15) has a largest second radius of curvature which lies within the range of 10% to 30% of a width of the compound needle (1).
  9. Compound needle according to one of Claims 1 to 8, characterized in that the edge profiling (14, 15) continues in the stem (5).
  10. Compound needle according to one of Claims 1 to 9, characterized in that the edge profiling (14, 15) is limited to a loop formation region of the compound needle (1), the loop formation region extending from the needle head (2) over a length in a range from 7 mm to 17 mm.
EP18202715.1A 2018-10-25 2018-10-25 Warp knitting machine compound needle Active EP3643823B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP18202715.1A EP3643823B1 (en) 2018-10-25 2018-10-25 Warp knitting machine compound needle
ES18202715T ES2890929T3 (en) 2018-10-25 2018-10-25 Slider needle of a warp knitting machine
CN201910141986.7A CN111101288B (en) 2018-10-25 2019-02-26 Composite needle of warp knitting machine
TW108128759A TWI766180B (en) 2018-10-25 2019-08-13 Compound needle for a warp knitting machine
KR1020190125780A KR102285359B1 (en) 2018-10-25 2019-10-11 Compound needle for a warp knitting machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18202715.1A EP3643823B1 (en) 2018-10-25 2018-10-25 Warp knitting machine compound needle

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EP3643823A1 EP3643823A1 (en) 2020-04-29
EP3643823B1 true EP3643823B1 (en) 2021-06-30

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EP18202715.1A Active EP3643823B1 (en) 2018-10-25 2018-10-25 Warp knitting machine compound needle

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EP (1) EP3643823B1 (en)
KR (1) KR102285359B1 (en)
CN (1) CN111101288B (en)
ES (1) ES2890929T3 (en)
TW (1) TWI766180B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3702504B1 (en) * 2020-06-30 2022-09-07 KARL MAYER STOLL R&D GmbH Warp knitting machine, sliding-tongue needle assembly and method for producing an elastic warp knit fabric
CN113512815B (en) * 2021-07-16 2022-10-18 广州市赛德精工科技有限公司 Groove needle of warp knitting machine

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EP3643823A1 (en) 2020-04-29
ES2890929T3 (en) 2022-01-25
TW202016384A (en) 2020-05-01
KR102285359B1 (en) 2021-08-03
TWI766180B (en) 2022-06-01
CN111101288B (en) 2022-05-24
CN111101288A (en) 2020-05-05
KR20200047327A (en) 2020-05-07

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