EP0571323A1 - Apparatus for the continuous crimping of thermoplastic yarns - Google Patents

Apparatus for the continuous crimping of thermoplastic yarns Download PDF

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Publication number
EP0571323A1
EP0571323A1 EP93810311A EP93810311A EP0571323A1 EP 0571323 A1 EP0571323 A1 EP 0571323A1 EP 93810311 A EP93810311 A EP 93810311A EP 93810311 A EP93810311 A EP 93810311A EP 0571323 A1 EP0571323 A1 EP 0571323A1
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EP
European Patent Office
Prior art keywords
guide means
plug
crimping
pairs
roller
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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.)
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EP93810311A
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German (de)
French (fr)
Inventor
Werner Nabulon
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP0571323A1 publication Critical patent/EP0571323A1/en
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes
    • D02G1/122—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes introducing the filaments in the stuffer box by means of a fluid jet
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes

Definitions

  • the invention is in the field of textile technology and relates to a device according to the preamble of the independent claim, which is used for the continuous crimping of threads made of a thermoplastic material.
  • Devices for the continuous crimping of threads made of a thermoplastic material are described, for example, in European Patent Publication No. 310890 by the same applicant.
  • the devices described have a stationary crimping nozzle with a delivery channel and a nozzle outlet opening and a rotating plug delivery roller.
  • the ruffling nozzle is arranged essentially tangentially to the plug conveyor roller in such a way that the nozzle outlet opening and a guide fork arranged in the region of this opening protrude between two perforated lateral guide means running parallel to one another around the circumference of the plug conveyor roller.
  • the stuffer box is limited on the one hand by the stationary parts of the guide fork, and on the other hand by the lateral guide means rotating with the plug conveyor roller.
  • the thread is conveyed by means of a heated conveying medium under pressure through the conveying channel against the nozzle outlet opening and is simultaneously heated.
  • the conveyed medium relaxes and the thread builds up in the stuffer box to form a plug which is guided away on the plug conveyor roller by the lateral guide means.
  • the speed of the thread in the feed channel is greater than the peripheral speed of the plug conveyor roller (plug speed).
  • the side guide means are perforated so that the medium can relax in the area of the nozzle outlet opening.
  • rows of radially arranged needles have proven to be advantageous as lateral guide means.
  • the plug conveyor roller In most applications, a plurality of threads running in parallel are processed, the plug conveyor roller then having a plurality of pairs of lateral guide means for each plug, which are parallel to one another and spaced apart.
  • cross-flows arise in operation, in particular for rolls with several pairs of needles, which can have a disruptive effect on plug formation. It also shows that such plug conveyor rollers, especially those with rows of needles (needle rollers), are difficult to handle and are easily damaged when replaced, especially when hot.
  • thermoplastic threads for which the first-mentioned disadvantage is eliminated. Furthermore, it is the object of the invention to also remedy the second-mentioned disadvantage with only small modifications, that is to say to provide a device for continuous crimping for which the replacement and handling of the plug conveyor roller, in particular in the form of a needle roller, is simplified and more straightforward compared to such devices according to the prior art.
  • Figure 1 schematically shows a device for the continuous crimping of thermoplastic threads. It has a crimping nozzle 1 with a delivery channel 11 and a nozzle outlet opening 12, a needle roller 2 with at least one pair of needle rows 21 and a cooling roller 3.
  • the ruffling nozzle 1 is arranged such that the delivery channel 11 with the nozzle outlet opening 12 opens tangentially to the needle roller 2 and between the rows of needles 21.
  • a guide fork 13 is, for example, molded onto the crimping nozzle.
  • An upper and a lower guide part of the guide fork together with the rows of needles form a stuffer box 4.
  • FIG. 2 shows in detail and parallel to the axis of the needle roller, the area of the stuffer box 4. From this, the arrangement of the guide fork and its upper part 41 facing away from the needle roller 2 and its lower part 42 facing the needle roller 2 is between the two rows of needles 21 'and 21 "can be seen.
  • the device according to the invention is now designed in such a way that the ruffling nozzle and the needle roller can be moved apart such that the needle roller can be easily removed in the axial direction.
  • the needle roller is designed in such a way that it can easily be deposited on almost any support surface, which greatly simplifies its handling, especially when it is hot.
  • the crimping nozzle is moved out of the area of the needle rows, the needle roller is dismantled, deposited and an exchange roller is installed.
  • the roll change can be carried out in a minimum of time.
  • the simple depositability of the roller is important because it has an increased temperature during operation and must be dismantled and deposited in this state.
  • the needle roller carries on its circumference the rows of needles, or other perforated lateral guide elements for guiding the plug. These are very sensitive, which means that the roller cannot be supported on the needles without damage. For this reason, the needle roller according to the invention carries a protective ring on both sides outside the pair of needle rows, which is arranged parallel to the needle rows and spaced from them. In contrast to the rows of needles, the protective rings are not broken, which means more stable.
  • They are arranged at a distance from the rows of needles in such a way that they do not influence the expansion of the medium in the area of the stuffer box, and have an at least equal or larger outer radius than the rows of needles in such a way that the needle roller, when deposited with an axis of rotation parallel to a support surface , not on the rows of needles, but on the protective rings.
  • each pair of needle rows is advantageously separated from the adjacent pairs of needle rows by a protective ring.
  • a protective ring is also provided on the outermost pairs of needles. In this way, each pair of needle rows runs separately between two protective rings.
  • FIG. 3 now shows an exemplary embodiment of a needle roller for a crimping device according to the invention.
  • the needle roller 2 is fastened, for example, with an easily accessible screw 22 to a shaft 23 driving it.
  • the needle roller 2 carries, for example, two pairs of rows of needles 21.1 and 21.2.
  • Protected rings 27.1, 27.2 and 27.3 are provided on both sides of a pair of needles, the outer diameter of which is larger than the outer diameter of the pairs of needles 21.1 and 21.2, that is to say they protrude by about one millimeter, for example.
  • the stuffer boxes are better aerodynamically separated from one another and the rows of needles are protected from lateral access during operation, and the needle roller can be easily manipulated when disassembled.
  • the pairs of needles are advantageously each mounted on a support ring (28.1, 28.2), the support ring having an axial extent that is greater than the axial extent of the pair of needle rows.
  • support rings can be arranged in different numbers side by side.
  • the supporting rings can be provided on their outer edges with corner grooves 29, in which the protective rings are mounted, or the protective rings can simply be provided and mounted as intermediate rings between supporting rings without corner grooves.
  • protective rings of double thickness or two protective rings must be used between two such rings (27.2), while protective rings of single thickness or only one protective ring (27.1 and 27.3) must be used on the outside.
  • Figures 4 and 5 show in detail a support ring 28 with a pair of rows of needles 21 and corner grooves 29. Dash-dotted lines are also indicated by protective rings 27.1 and 27.2, wherein the protective ring 27.1 (single thickness) closes the needle roller axially, the protective ring 27.2 (double thickness) represents the limitation of the axial area of a pair of needles to the area of another pair of needles.
  • protective rings is not limited to plug conveyor rollers (needle rollers) equipped with pairs of rows of needles, but can also be used to protect any other type of perforated lateral guide means on a plug conveyor roller.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

The apparatus according to the invention for the continuous crimping of thermoplastic yarns has at least one crimping nozzle with a conveying channel and a nozzle outlet orifice, and at least one pair of lateral guide means (21), for example needle rows, arranged around the circumference of a plug-conveying roller (2). For an apparatus in which a plurality of yarns are crimped in parallel, a plurality of pairs of guide means (21.1, 21.2) are arranged spaced axially from one another on the same plug-conveying roller (2). To prevent disturbing transverse flows, to equalise the aerodynamic conditions during plug formation in the region of the nozzle outlet orifice of the crimping nozzles and for the easy handlability of the plug-conveying roller, the pairs of guide means are screened off from one another and from the outside in the axial direction by guard rings (27.1, 27.2, 27.3) having an outside diameter equal to or larger than that of the pairs of guide means (21.1, 21.2). <IMAGE>

Description

Die Erfindung liegt auf dem Gebiete der Textiltechnik und betrifft eine Vorrichtung gemäss dem Oberbegriff des unabhängigen Patentanspruches, die zum kontinuierlichen Kräuseln von Fäden aus einem thermoplastischen Material dient.The invention is in the field of textile technology and relates to a device according to the preamble of the independent claim, which is used for the continuous crimping of threads made of a thermoplastic material.

Vorrichtungen zum kontinuierlichen Kräuseln von Fäden aus einem thermoplastischen Material sind beispielsweise beschrieben in der europäischen Patenschrift Nr. 310890 derselben Anmelderin. Die beschriebenen Vorrichtungen weisen eine stationäre Kräuseldüse mit einem Förderkanal und einer Düsenaustrittsöffnung und eine rotierende Pfropfenförderwalze auf. Die Kräuseldüse ist im wesentlichen tangential zur Pfropfenförderwalze derart angeordnet, dass die Düsenaustrittsöffnung und eine im Bereiche dieser Öffnung angebrachte Führungsgabel zwischen zwei parallel zueinander um den Umfang der Pfropfenförderwalze laufende, durchbrochene seitliche Führungsmittel ragt. Die Stauchkammer wird einerseits begrenzt durch die stationären Teile der Führungsgabel, andererseits durch die mit der Pfropfenförderwalze rotierenden seitlichen Führungsmittel.Devices for the continuous crimping of threads made of a thermoplastic material are described, for example, in European Patent Publication No. 310890 by the same applicant. The devices described have a stationary crimping nozzle with a delivery channel and a nozzle outlet opening and a rotating plug delivery roller. The ruffling nozzle is arranged essentially tangentially to the plug conveyor roller in such a way that the nozzle outlet opening and a guide fork arranged in the region of this opening protrude between two perforated lateral guide means running parallel to one another around the circumference of the plug conveyor roller. The stuffer box is limited on the one hand by the stationary parts of the guide fork, and on the other hand by the lateral guide means rotating with the plug conveyor roller.

Zum Kräuseln wird der Faden mittels eines erhitzten Fördermediums unter Druck durch den Förderkanal gegen die Düsenaustrittsöffnung gefördert und gleichzeitig erhitzt. Unmittelbar ausserhalb der Düsenaustrittsöffnung entspannt sich das Fördermedium und der Faden staut sich in der Stauchkammer zu einem Pfropfen auf, der durch die seitlichen Führungsmittel geführt auf der Pfropfenförderwalze weggefördert wird. Dabei ist die Geschwindigkeit des Fadens im Förderkanal grösser als die Umfangsgeschwindigkeit der Pfropfenförderwalze (Pfropfengeschwindigkeit). Damit das Fördermedium sich im Bereiche der Düsenaustrittsöffnung entspannen kann, sind die seitlichen Führungsmittel durchbrochen gestaltet. Insbesondere haben sich als seitliche Führungsmittel Reihen von radial angeordneten Nadeln als vorteilhaft erwiesen.For crimping, the thread is conveyed by means of a heated conveying medium under pressure through the conveying channel against the nozzle outlet opening and is simultaneously heated. Immediately outside the nozzle outlet opening, the conveyed medium relaxes and the thread builds up in the stuffer box to form a plug which is guided away on the plug conveyor roller by the lateral guide means. The speed of the thread in the feed channel is greater than the peripheral speed of the plug conveyor roller (plug speed). The side guide means are perforated so that the medium can relax in the area of the nozzle outlet opening. In particular, rows of radially arranged needles have proven to be advantageous as lateral guide means.

In den meisten Anwendungen werden eine Mehrzahl von parallel laufenden Fäden bearbeitet, wobei die Pfropfenförderwalze dann mehrere Paare von seitlichen Führungsmitteln für je einen Pfropfen aufweist, die zueinander parallel und voneinander beabstandet sind.In most applications, a plurality of threads running in parallel are processed, the plug conveyor roller then having a plurality of pairs of lateral guide means for each plug, which are parallel to one another and spaced apart.

Es zeigt sich, dass insbesondere für Walzen mit mehreren Nadelreihenpaaren im Betrieb Querströmungen (in achsialer Richtung der Pfropfenförderwalze) entstehen, welche sich störend auf die Pfropfenbildung auswirken können. Es zeigt sich auch, dass derartige Pfropfenförderwalzen, insbesondere solche mit Nadelreihen (Nadelwalzen), beim Auswechseln, insbesondere in heissem Zustand, schwierig zu handhaben sind und leicht beschädigt werden.It can be seen that cross-flows (in the axial direction of the plug conveyor roller) arise in operation, in particular for rolls with several pairs of needles, which can have a disruptive effect on plug formation. It also shows that such plug conveyor rollers, especially those with rows of needles (needle rollers), are difficult to handle and are easily damaged when replaced, especially when hot.

Es ist nun die Aufgabe der Erfindung, eine Vorrichtung zum kontinuierlichen Kräuseln von thermoplastischen Fäden zu schaffen, für die der erstgenannte Nachteil behoben ist. Ferner ist es die Aufgabe der Erfindung, mit nur kleinen Modifikationen auch den zweitgenannten Nachteil zu beheben, das heisst, eine Vorrichtung zum kontinuierlichen Kräuseln zu schaffen, für die das Auswechseln und Handhaben der Pfropfenförderwalze, insbesondere in Form einer Nadelwalze, gegenüber derartigen Vorrichtungen gemäss dem Stande der Technik vereinfacht und problemloser ist.It is now the object of the invention to provide a device for the continuous crimping of thermoplastic threads, for which the first-mentioned disadvantage is eliminated. Furthermore, it is the object of the invention to also remedy the second-mentioned disadvantage with only small modifications, that is to say to provide a device for continuous crimping for which the replacement and handling of the plug conveyor roller, in particular in the form of a needle roller, is simplified and more straightforward compared to such devices according to the prior art.

Die erste Aufgabe wird gelöst durch die Vorrichtung gemäss dem unabhängigen Patentanspruch. Die zweite Aufgabe wird gelöst durch die Kombination dieses Anspruches mit dem ersten abhängigen Anspruch. Die erfindungsgemasse Vorrichtung soll anhand der folgenden Figuren detailliert beschrieben werden. Es zeigt:

Figur 1
eine Vorrichtung zum kontinuierlichen Kräuseln von thermoplastischen Fäden mit Blickrichtung parallel zur Achse der Nadelwalze, wie sie aus der Figur 1 der europäischen Patentschrift Nr. 0310890 bekannt ist;
Figur 2
ein Schnitt durch den Bereich der Stauchkammer der in der Figur 1 dargestellten Vorrichtung, parallel zur Achse der Nadelwalze (Figur 8 der EP-0310890);
Figur 3
eine beispielhafte Ausführungsform der Nadelwalze für die erfindungsgemässe Vorrichtung zum kontinuierlichen Kräuseln von thermoplastischen Fäden, parallel zur Drehachse geschnitten;
Figur 4
ein Detail von Figur 3, im gleichen Schnitt dargestellt wie Figur 3;
Figur 5
das Detail von Figur 4 mit Blickrichtung parallel zur Achse der Nadelwalze.
The first object is achieved by the device according to the independent claim. The second object is achieved by combining this claim with the first dependent claim. The device according to the invention will be described in detail with reference to the following figures. It shows:
Figure 1
a device for the continuous crimping of thermoplastic threads looking in the direction parallel to the axis of the needle roller, as is known from FIG. 1 of European Patent No. 0310890;
Figure 2
a section through the area of the stuffer box of the device shown in Figure 1, parallel to the axis of the needle roller (Figure 8 of EP-0310890);
Figure 3
an exemplary embodiment of the needle roller for the inventive device for the continuous crimping of thermoplastic threads, cut parallel to the axis of rotation;
Figure 4
a detail of Figure 3, shown in the same section as Figure 3;
Figure 5
the detail of Figure 4 looking parallel to the axis of the needle roller.

Figur 1 zeigt schematisch dargestellt eine Vorrichtung zum kontinuierlichen Kräuseln von thermoplastischen Fäden. Sie weist eine Kräuseldüse 1 mit einem Förderkanal 11 und einer Düsenaustrittsöffnung 12, eine Nadelwalze 2 mit mindestens einem Paar von Nadelreihen 21 und eine Kühlwalze 3 auf. Die Kräuseldüse 1 ist derart angeordnet, dass der Förderkanal 11 mit der Düsenaustrittsöffnung 12 tangential an die Nadelwalze 2 und zwischen die Nadelreihen 21 mündet. Im Bereiche der Düsenaustrittsöffnung ist an die Kräuseldüse eine Führungsgabel 13 beispielsweise angeformt. Ein oberer und ein unterer Führungsteil der Führungsgabel bilden zusammen mit den Nadelreihen eine Stauchkammer 4. Figure 1 schematically shows a device for the continuous crimping of thermoplastic threads. It has a crimping nozzle 1 with a delivery channel 11 and a nozzle outlet opening 12, a needle roller 2 with at least one pair of needle rows 21 and a cooling roller 3. The ruffling nozzle 1 is arranged such that the delivery channel 11 with the nozzle outlet opening 12 opens tangentially to the needle roller 2 and between the rows of needles 21. In the area of the nozzle outlet opening, a guide fork 13 is, for example, molded onto the crimping nozzle. An upper and a lower guide part of the guide fork together with the rows of needles form a stuffer box 4.

Figur 2 zeigt im Detail und parallel zur Achse der Nadelwalze geschnitten den Bereich der Stauchkammer 4. Daraus ist die Anordnung der Führungsgabel und ihres oberen, von der Nadelwalze 2 abgewandten Teils 41 und ihres unteren, der Nadelwalze 2 zugewandten Teiles 42 zwischen den beiden Nadelreihen 21' und 21" ersichtlich. FIG. 2 shows in detail and parallel to the axis of the needle roller, the area of the stuffer box 4. From this, the arrangement of the guide fork and its upper part 41 facing away from the needle roller 2 and its lower part 42 facing the needle roller 2 is between the two rows of needles 21 'and 21 "can be seen.

Die erfindungsgemässe Vorrichtung ist nun derart ausgestaltet, dass Kräuseldüse und Nadelwalze derart auseinander bewegt werden können, dass die Nadelwalze einfach in achsialer Richtung entfernbar ist. Die Nadelwalze ist derart ausgestaltet, dass sie problemlos auf einer fast beliebigen Auflagefläche deponiert werden kann, was ihre Handhabung insbesondere in heissem Zustand sehr vereinfacht. Zum Auswechseln der Nadelwalze wird die Kräuseldüse aus dem Bereich der Nadelreihen bewegt, die Nadelwalze demontiert, deponiert und eine Austauschwalze montiert. Der Walzenwechsel ist in einem Minimum an Zeit realisierbar. Die einfache Deponierbarkeit der Walze ist wichtig, da diese im Betrieb eine erhöhte Temperatur hat und in diesem Zustand demontiert und deponiert werden muss.The device according to the invention is now designed in such a way that the ruffling nozzle and the needle roller can be moved apart such that the needle roller can be easily removed in the axial direction. The needle roller is designed in such a way that it can easily be deposited on almost any support surface, which greatly simplifies its handling, especially when it is hot. To replace the needle roller, the crimping nozzle is moved out of the area of the needle rows, the needle roller is dismantled, deposited and an exchange roller is installed. The roll change can be carried out in a minimum of time. The simple depositability of the roller is important because it has an increased temperature during operation and must be dismantled and deposited in this state.

Die Nadelwalze trägt auf ihrem Umfang die Nadelreihen, oder andere, durchbrochene seitliche Führungselemente für die Führung des Pfropfens. Diese sind sehr empfindlich, das heisst, die Walze kann nicht ohne Beschädigung auf den Nadeln abgestützt werden. Aus diesem Grunde trägt die Nadelwalze erfindungsgemäss beidseitig ausserhalb des Nadelreihenpaares je einen Schutzring, der parallel zu den Nadelreihen und von diesen beabstandet angeordnet ist. Die Schutzringe sind im Unterschied zu den Nadelreihen nicht durchbrochen, das heisst stabiler. Sie sind von den Nadelreihen beabstandet angeordnet derart, dass sie die Entspannung des Fördermediums im Bereiche der Stauchkammer nicht beeinflussen, und besitzen einen mindestens galeichen oder grösseren Aussenradius als die Nadelreihen, derart, dass die Nadelwalze, wenn sie mit zu einer Auflagefläche paralleler Drehachse deponiert wird, nicht auf den Nadelreihen, sondern auf den Schutzringen aufliegt.The needle roller carries on its circumference the rows of needles, or other perforated lateral guide elements for guiding the plug. These are very sensitive, which means that the roller cannot be supported on the needles without damage. For this reason, the needle roller according to the invention carries a protective ring on both sides outside the pair of needle rows, which is arranged parallel to the needle rows and spaced from them. In contrast to the rows of needles, the protective rings are not broken, which means more stable. They are arranged at a distance from the rows of needles in such a way that they do not influence the expansion of the medium in the area of the stuffer box, and have an at least equal or larger outer radius than the rows of needles in such a way that the needle roller, when deposited with an axis of rotation parallel to a support surface , not on the rows of needles, but on the protective rings.

Dient die Nadelwalze zur Kräuselung mehrerer, paralleler Fäden, indem sie für jeden der Fäden ein Paar von Nadelreihen aufweist, dann wird vorteilhafterweise jedes Nadelreihenpaar von den benachbarten Nadelreihenpaaren durch einen Schutzring getrennt. Zudem wird aussen an den äussersten Nadelreihenpaaren ebenfalls ein Schutzring vorgesehen. Derart verläuft jedes Nadelreihenpaar separat zwischen zwei Schutzringen. Ein zusätzlicher Vorteil dieser Anordnung besteht darin, dass die Strömungen in den einzelnen Stauchkammern, die vor allem durch die Entspannung des Fördermediums unmittelbar ausserhalb der Düsenaustrittsöffnung entsteht, einander gegenseitig nicht beeinflussen, wie das in einer Anordnung ohne Schutzringe der Fall ist. Weist die Nadelwalze mehr als zwei, nebeneinander angeordnete Nadelreihenpaare auf, tragen die Schutzringe auch dazu bei, dass die Verhältnisse in allen Stauchkammern dieselben sind, unabhängig davon, ob eine Stauchkammer eine oder zwei benachbarte Stauchkammern hat.If the needle roller serves to crimp a plurality of parallel threads by having a pair of needle rows for each of the threads, then each pair of needle rows is advantageously separated from the adjacent pairs of needle rows by a protective ring. In addition, a protective ring is also provided on the outermost pairs of needles. In this way, each pair of needle rows runs separately between two protective rings. An additional advantage of this arrangement is that the flows in the individual stuffer boxes, which arise primarily due to the expansion of the delivery medium directly outside the nozzle outlet opening, do not influence one another, as is the case in an arrangement without protective rings. If the needle roller has more than two pairs of needles arranged next to one another, the protective rings also help to ensure that the conditions are the same in all stuffer boxes, regardless of whether a stuffer box has one or two adjacent stuffer boxes.

Figur 3 zeigt nun eine beispielhafte Ausführungsform einer Nadelwalze für eine erfindungsgemässe Kräuselvorrichtung. Die Nadelwalze 2 ist beispielsweise mit einer leicht zugänglichen Schraube 22 an einer sie antreibenden Welle 23 befestigt. Die Nadelwalze 2 trägt beispielsweise zwei Paare von Nadelreihen 21.1 und 21.2. beidseitig beabstandet von je einem Nadelreihenpaar sind Schutzringe 27.1, 27.2 und 27.3 vorgesehen, deren Aussendurchmesser grösser ist als der Aussendurchrnesser der Nadelreihenpaare 21.1 und 21.2, das heisst, diese um beispielsweise etwa einen Millimeter überragen. FIG. 3 now shows an exemplary embodiment of a needle roller for a crimping device according to the invention. The needle roller 2 is fastened, for example, with an easily accessible screw 22 to a shaft 23 driving it. The needle roller 2 carries, for example, two pairs of rows of needles 21.1 and 21.2. Protected rings 27.1, 27.2 and 27.3 are provided on both sides of a pair of needles, the outer diameter of which is larger than the outer diameter of the pairs of needles 21.1 and 21.2, that is to say they protrude by about one millimeter, for example.

Durch die Schutzringe sind die Stauchkammern aerodynamisch besser voneinander getrennt und die Nadelreihen im Betrieb vor seitlichem Zugriff geschützt und in demontiertem Zustand ist die Nadelwalze problemlos manipulierbar.Thanks to the protective rings, the stuffer boxes are better aerodynamically separated from one another and the rows of needles are protected from lateral access during operation, and the needle roller can be easily manipulated when disassembled.

Die Nadelreihenpaare sind vorteilhafterweise je auf einem Tragring (28.1, 28.2) angebracht, wobei der Tragring achsial eine Ausdehnung hat, die grösser ist als die achsiale Ausdehnung des Nadelreihenpaares. Je nach Anwendung können derartige Tragringe in verschiedener Zahl nebeneinander angeordnet sein. Die Tragringe können an ihren Aussenkanten mit Ecknuten 29 versehen sein, in denen die Schutzringe montiert werden, oder die Schutzringe können einfach als Zwischenringe zwischen Tragringen ohne Ecknuten vorgesehen und montiert werden. Damit Tragringe mit Ecknuten gegeneinander beliebig austauschbar sind, müssen zwischen zwei derartigen Ringen Schutzringe mit doppelter Dicke oder zwei Schutzringe verwendet werden (27.2), während aussen Schutzringe einfacher Dicke oder nur ein Schutzring (27.1 und 27.3) verwendet werden.The pairs of needles are advantageously each mounted on a support ring (28.1, 28.2), the support ring having an axial extent that is greater than the axial extent of the pair of needle rows. Depending on the application, such support rings can be arranged in different numbers side by side. The supporting rings can be provided on their outer edges with corner grooves 29, in which the protective rings are mounted, or the protective rings can simply be provided and mounted as intermediate rings between supporting rings without corner grooves. In order for support rings with corner grooves to be interchangeable with one another, protective rings of double thickness or two protective rings must be used between two such rings (27.2), while protective rings of single thickness or only one protective ring (27.1 and 27.3) must be used on the outside.

Figuren 4 und 5 zeigen im Detail einen Tragring 28 mit einem Nadelreihenpaar 21 und Ecknuten 29. Strichpunktiert angedeutet sind auch Schutzringe 27.1 und 27.2, wobei der Schutzring 27.1 (einfache Dicke) die Nadelwalze achsial abschliesst, der Schutzring 27.2 (doppelte Dicke) die Begrenzung des achsialen Bereiches eines Nadelreihenpaares zum Bereich eines anderen Nadelreihenpaares darstellt. Figures 4 and 5 show in detail a support ring 28 with a pair of rows of needles 21 and corner grooves 29. Dash-dotted lines are also indicated by protective rings 27.1 and 27.2, wherein the protective ring 27.1 (single thickness) closes the needle roller axially, the protective ring 27.2 (double thickness) represents the limitation of the axial area of a pair of needles to the area of another pair of needles.

Wie bereits erwähnt, beschränkt sich die Anwendung von Schutzringen nicht auf mit Nadelreihenpaaren ausgerüstete Pfropfenförderwalzen (Nadelwalzen), sondern kann zum Schutze jeder andern Art von durchbrochenen seitlichen Führungsmitteln auf einer Pfropfenförderwalze ebenfalls herangezogen werden.As already mentioned, the use of protective rings is not limited to plug conveyor rollers (needle rollers) equipped with pairs of rows of needles, but can also be used to protect any other type of perforated lateral guide means on a plug conveyor roller.

Claims (6)

Vorrichtung zum kontinuierlichen Kräuseln von thermoplastischen Fäden, die eine Kräuseldüse (1) mit einem Förderkanal (11) und einer Düsenaustrittsöffnung (12) aufweist und eine rotierende Pfropfenförderwalze (2), mit mindestens einem Paar von durchbrochenen seitlichen Führungsmitteln (21), insbesondere Nadelreihen, zwischen die die Kräuseldüse ragt, dadurch gekennzeichnet, dass um den Umfang der Pfropfenförderwalze (2) beidseitig des Führungsmittelpaares (21), beabstandet von den Führungsmitteln und parallel zu diesen Schutzringe (27.1, 27.2, 27.3) angeordnet sind.Device for the continuous crimping of thermoplastic threads, which has a crimping nozzle (1) with a conveying channel (11) and a nozzle outlet opening (12) and a rotating plug-conveying roller (2) with at least one pair of perforated lateral guide means (21), in particular rows of needles, between which the crimping nozzle protrudes, characterized in that around the circumference of the plug conveyor roller (2) on both sides of the pair of guide means (21), at a distance from the guide means and parallel to these protective rings (27.1, 27.2, 27.3) are arranged. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Schutzringe (27.1, 27.2, 27.3) einen gleichen oder grösseren Aussendurchmesser aufweisen als die Führungsmittel (21).Device according to claim 1, characterized in that the protective rings (27.1, 27.2, 27.3) have the same or larger outer diameter than the guide means (21). Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekenn zeichnet, dass die Pfropfenförderwalze (2) eine Nadelwalze und die Führungsmittel Nadelreihen sind.Device according to one of claims 1 or 2, characterized in that the plug conveyor roller (2) is a needle roller and the guide means are rows of needles . Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekenn zeichnet, dass auf derselben Pfropfenförderwalze (2) in achsialer Richtung beabstandet voneinander mehrere Führungsmittelpaare (21.1, 21.2) angeordnet sind und dass zwischen zwei Führungsmittelpaaren ein, von beiden Führungsmittelpaaren gleich beabstandeter Schutzring (27.2) angeordnet ist.Device according to one of claims 1 to 3, characterized in that on the same plug conveying roller (2) spaced apart in the axial direction from each other, a plurality of guide means couples (21.1, 21.2) are arranged and that between two guide means couples one of two guide means pairs of equally spaced guard ring (27.2) is arranged. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekenn zeichnet, dass jedes Führungsmittelpaar auf einem separaten Tragring (28.1, 28.2) angeordnet ist, der in achsialer Richtung eine Ausdehnung hat, die grösser ist als die achsiale Ausdehnung des Führungsmittelpaares (21).Device according to one of claims 1 to 4, characterized in that each pair of guide means is arranged on a separate support ring (28.1, 28.2) which has an extent in the axial direction which is greater than the axial extent of the pair of guide means (21). Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekenn zeichnet, dass Schutzringe (27.2) zwischen zwei Führungsmittelpaaren doppelt so dick sind wie die äusseren Schutzringe (27.1, 27.3) oder aus zwei äusseren Schutzringen bestehen.Device according to one of claims 1 to 5, characterized in that guard rings (27.2) between two pairs of guide means are twice as thick as the outer guard rings (27.1, 27.3) or consist of two outer guard rings.
EP93810311A 1992-05-20 1993-04-28 Apparatus for the continuous crimping of thermoplastic yarns Withdrawn EP0571323A1 (en)

Applications Claiming Priority (2)

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CH161492 1992-05-20
CH1614/92 1992-05-20

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CH689040B5 (en) * 1992-11-19 1999-02-26 Rieter Ag Maschf Method and apparatus for texturing of thermoplastic yarns.
US6311375B1 (en) * 2000-07-27 2001-11-06 Gilbert Patrick Method of needle punching yarns
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CN117238224A (en) 2018-08-31 2023-12-15 奇跃公司 Spatially resolved dynamic dimming for augmented reality devices
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