EP0464424B1 - Procedure for automatically regulating the braking force of a yarn brake situated in the hollow spindle of a two-for-one twisting spindle and two-for-one twisting spindle equipped with such a yarn brake - Google Patents
Procedure for automatically regulating the braking force of a yarn brake situated in the hollow spindle of a two-for-one twisting spindle and two-for-one twisting spindle equipped with such a yarn brake Download PDFInfo
- Publication number
- EP0464424B1 EP0464424B1 EP91109766A EP91109766A EP0464424B1 EP 0464424 B1 EP0464424 B1 EP 0464424B1 EP 91109766 A EP91109766 A EP 91109766A EP 91109766 A EP91109766 A EP 91109766A EP 0464424 B1 EP0464424 B1 EP 0464424B1
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- Prior art keywords
- spindle
- braking
- brake
- thread
- twisting spindle
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/10—Tension devices
- D01H13/104—Regulating tension by devices acting on running yarn and not associated with supply or take-up devices
- D01H13/106—Regulating tension by devices acting on running yarn and not associated with supply or take-up devices for double-twist spindle
Definitions
- thread storage in the area of the thread storage disk is a necessary important operating criterion for the precisely running twisting process.
- the thread wrapping on the thread storage disk is absolutely necessary to build up an additional thread tension for the balance between the inner thread tension and the balloon tension.
- the wrap angle of the thread around the thread storage disk is referred to as storage.
- a Over and under storage leads to negative sequelae, which ultimately result in thread breaks.
- the storage must be individually tailored to the yarn titer, the spindle geometry and the spindle speed as well as the take-off speed.
- the storage acts like an almost mass-free and therefore inertia-free thread brake, the law of which corresponds to the rope friction formula taking into account the centrifugal force. If a parameter of the thread balloon is changed with the same internal braking, e.g. the spindle geometry (diameter, height), the yarn titer or the spindle speed, the storage also changes.
- the invention is based on the object of designing a method for automatically adjusting the braking force of a thread brake arranged in the spindle hollow axis of a double-wire twisting spindle and a corresponding double-wire twisting spindle such that the braking force changes automatically when the operating speed of the spindle changes without additional intervention from outside ago changed so that despite changed operating conditions the storage angle remains unchanged or almost unchanged.
- the solution according to the invention essentially consists in the fact that to change the braking force of the thread brake arranged in the interior of the spindle hollow axis, the underpressure which is inevitable in the region of the spindle hollow axis when a double-wire twisting spindle is running is used.
- This underpressure arises from the fact that the rotating thread storage disk, which is present in a double-wire twisting spindle, works like a centrifugal pump due to its radially directed thread guide channel, as a result of which part of the air is thrown out of the hollow-axis region of the spindle. Since the hollow axis is closed by the thread brake, an underpressure inevitably builds up below the thread brake, which is used according to the invention to change the position of a braking surface of the thread brake and thus to change the braking force.
- Fig. 1 shows the essential parts of a double-wire twisting spindle of a known type, namely the whorl 1, the turntable 2 with the thread storage disk 2.1 arranged underneath, the bobbin 3 with the protective pot base 3.1 and the thread inlet tube 4.
- the bobbin 3 is in operation of the spindle against the essentially the whorl 1, the turntable 2 and the thread storage disk 2.1 comprising spindle rotor kept at rest.
- the thread F is pulled up from the bobbin 5, inserted into the thread inlet tube 4 and guided downward through the spindle holing axis. Below the turntable 2, the thread is deflected by 90 o and through the thread guide channel 2.2 the thread storage disk 2.1 led to the outside to form a balloon.
- the thread F loops around the thread storage disk 2.1, not shown, in the manner shown schematically in FIG. 2 for the purpose of thread storage.
- the angle of wrap of the thread is indicated in Fig. 2 and amounts there about 360 o.
- this thread storage angle can assume values from 0 o to over 360 o , a storage angle of 0 o meaning that the thread is deflected only by 90 o after exiting the thread guide channel 2.1 and radially outwards or upwards into the Thread balloon is guided.
- the thread balloon formed by the thread F after leaving the thread storage disk 2.1 is delimited at its apex by the thread guide eyelet 10, from which the thread is carried in the usual way to a winding device (not shown).
- the thread storage angle is determined, among other things, on the one hand essentially by the spindle speed (speed of the spindle rotor) and on the other hand also by the setting of the thread brake, which is arranged inside the spindle retraction axis through which the thread F passes and is shown in Fig. 2 in a conventional design, e.g. known from DE-A-3 243 157, and is shown in Fig. 3 in the inventive design.
- a thread brake designed as a capsule brake which is loaded by a compression spring.
- This thread brake comprises, as essential components, upper and lower brake rings 6 and 9, between which the brake capsule 7 is supported as a brake body, which consists of a lower part 7.2 and an upper part 7.1 telescopically and in which a compression spring 8 is arranged.
- the coil carrier 3 is mounted by means of bearings 11;
- an inner protective pot hub 3.2 connects to the protective pot base 3.1.
- a rotary body 12 is pushed onto the protective pot hub 3.2 and has a lower cylinder section 12.1 of larger diameter, a frustoconical housing intermediate section 12.2 and an upper cylinder section 12.3 with a smaller diameter than section 12.1.
- the intermediate section 12.2 is provided with openings 12.21, the opening cross section of which can be changed by means of a rotary ring 15 placed on the intermediate section 12.2, which in the manner shown has openings which can be brought into juxtaposition with the openings 12.21.
- a cylindrical brake housing 13 is placed on the upper cylinder section 12.3, in the upper part of which the thread inlet pipe 4 is inserted.
- An axially displaceable piston 14 is accommodated in the brake housing 13 and has a central opening into which the brake ring 6 forming the upper braking surface is inserted.
- the thread storage disc acts with its thread guide channel 2.2. like a centrifugal pump, such that within the hollow spindle axis
- a suction air flow acting in the direction of the arrow f2 is built up by centrifugal force with the tendency that with increasing speed of the spindle or the thread storage disk, the piston 14 is pulled down and thereby the braking force between the brake capsule 7 and the brake rings 6 and 9 is increased. It is thereby achieved that the inner braking force applied by the thread brake and the thread storage are in the desired balance with the forces of the thread balloon in accordance with the law described at the beginning.
- the vacuum also increases quadratically with the speed.
- the resulting change in the braking force of the inner brake therefore increases approximately square.
- the principle according to the invention can also be implemented with a so-called grid brake, in which under the influence a changing negative pressure in the region of the hollow spindle axis, the distance between finger-like brake bodies is changed.
- the principle according to the invention can also be implemented in a plate or plate brake, in which the force on interacting brake body elements and brake surfaces is changed, which are arranged on a piston element comparable to the piston 14 within the hollow spindle axis.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Description
Bei einer Doppeldraht-Zwirnspindel stellt die Fadenspeicherung im Bereich der Fadenspeicherscheibe ein notwendiges wichtiges Betriebskriterium für den exakt ablaufenden Zwirnprozeß da. Bei einer Doppeldraht-Zwirnspindel ist die Fadenumschlingung auf der Fadenspeicherscheibe zum Aufbau einer zusätzlichen Fadenzugkraft für das Gleichgewicht zwischen den inneren Fadenzugkräften und der Ballonzugkraft unbedingt notwendig. Der Umschlingungswinkel des Fadens um die Fadenspeicherscheibe wird als Speicherung bezeichnet. Eine Über- und Unterspeicherung führt zur negativen Folgeerscheinungen, die letztlich in Fadenbrüchen enden. Die Speicherung muß individuell auf den Garntiter, die Spindelgeometrie und die Spindeldrehzahl sowie auf die Abzuggeschwindigkeit abgestimmt werden.In the case of a double-wire twisting spindle, thread storage in the area of the thread storage disk is a necessary important operating criterion for the precisely running twisting process. In the case of a double-wire twisting spindle, the thread wrapping on the thread storage disk is absolutely necessary to build up an additional thread tension for the balance between the inner thread tension and the balloon tension. The wrap angle of the thread around the thread storage disk is referred to as storage. A Over and under storage leads to negative sequelae, which ultimately result in thread breaks. The storage must be individually tailored to the yarn titer, the spindle geometry and the spindle speed as well as the take-off speed.
Die Speicherung wirkt wie eine fast massenlose und damit trägheitslose Fadenbremse, deren Gesetzmäßigkeit unter Berücksichtigung der Fliehkraft der Seilreibungsformel entspricht. Wird bei gleicher Innenbremsung ein Parameter des Fadenballons verändert, z.B. die Spindelgeometrie (Durchmesser, Höhe), der Garntiter oder die Spindeldrehzahl, so ändert sich auch die Speicherung.The storage acts like an almost mass-free and therefore inertia-free thread brake, the law of which corresponds to the rope friction formula taking into account the centrifugal force. If a parameter of the thread balloon is changed with the same internal braking, e.g. the spindle geometry (diameter, height), the yarn titer or the spindle speed, the storage also changes.
Bei der in der Praxis häufig vorkommenden Veränderung der Spindeldrehzahl ist daher eine Korrektur der Einzugskraft, der Fadenspeicherung vor der Speicherscheibe durch die Verstellung der Innenbremsung notwendig. Eine solche Bremse ist z.B. aus der DE-A-3 243 157 bekannt. Diese ist je nach Drehzahlveränderung stärker oder schwächer einzustellen. Dies kann aber in der Regel nur dann geschehen, wenn die Spindel abgestellt wird, um die üblicherweise im Bereich der Spindelhohlachse befindliche Fadenbremse neu einzustellen. Der notwendige Eingriff bei stehender Spindel ist nachteilig, da dieser Vorgang den Maschinennutzeffekt wegen hoher Rüstzeiten herabsetzt.When the spindle speed changes frequently in practice, it is therefore necessary to correct the pull-in force and the thread storage in front of the storage disk by adjusting the internal braking. Such a brake is e.g. known from DE-A-3 243 157. Depending on the change in speed, this should be set stronger or weaker. However, this can usually only happen when the spindle is switched off in order to readjust the thread brake which is usually located in the region of the hollow spindle axis. The necessary intervention when the spindle is stationary is disadvantageous, since this process reduces the machine utilization effect due to the long set-up times.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur selbsttätigen Anpassung der Bremskraft einer in der Spindelhohlachse einer Doppeldraht-Zwirnspindel angeordneten Fadenbremse und eine entsprechende Doppeldraht-Zwirnspindel so zu gestalten, daß die Bremskraft sich automatisch bei Veränderung der Betriebsdrehzahl der Spindel ohne zusätzlichen Eingriff von außen her so verändert, daß trotz veränderter Betriebsverhältnisse der Speicherwinkel unverändert oder nahezu unverändert bleibt.The invention is based on the object of designing a method for automatically adjusting the braking force of a thread brake arranged in the spindle hollow axis of a double-wire twisting spindle and a corresponding double-wire twisting spindle such that the braking force changes automatically when the operating speed of the spindle changes without additional intervention from outside ago changed so that despite changed operating conditions the storage angle remains unchanged or almost unchanged.
Zur Lösung dieser Aufgabe dienen die verfahrenstechnischen Maßnahmen gemäß Anspruch 1 und die bei einer Doppeldraht-Zwirnspindel verwirklichten Merkmale gemäß Anspruch 4.To achieve this object, the procedural measures according to
Die erfindungsgemäße Lösung besteht im wesentlich darin, daß zur Veränderung der Bremskraft der im Inneren der Spindelhohlachse angeordneten Fadenbremse der beim Lauf einer Doppeldraht-Zwirnspindel zwangsläufig im Bereich der Spindelhohlachse entstehende Unterdurck genutzt wird. Dieser Unterdurck entsteht dadurch, daß die bei einer Doppeldraht-Zwirnspindel vorhandene, rotierende Fadenspeicherscheibe aufgrund ihres radial gerichteten Fadenleitkanales wie eine Zentrifulgalpumpe arbeitet, wodurch ein Teil der Luft aus dem Hohlachsenbereich der Spindel herausgeschleudert wird. Da die Hohlachse durch die Fadenbremse verschlossen ist, baut sich unterhalb der Fadenbremse zwangsläufig ein Unterdurck auf, der erfindungsgemäß zur Lageveränderung einer Bremsfläche der Fadenbremse und damit zur einer Veränderung der Bremskraft herangezogen wird.The solution according to the invention essentially consists in the fact that to change the braking force of the thread brake arranged in the interior of the spindle hollow axis, the underpressure which is inevitable in the region of the spindle hollow axis when a double-wire twisting spindle is running is used. This underpressure arises from the fact that the rotating thread storage disk, which is present in a double-wire twisting spindle, works like a centrifugal pump due to its radially directed thread guide channel, as a result of which part of the air is thrown out of the hollow-axis region of the spindle. Since the hollow axis is closed by the thread brake, an underpressure inevitably builds up below the thread brake, which is used according to the invention to change the position of a braking surface of the thread brake and thus to change the braking force.
Um die wirksame Unterdruckkraft an die sonstigen Betriebsparametern der Doppeldraht-Zwirnspindel, wie Spulengeometrie und Garntiter anpassen zu können, ist gemäß weitere Erfindung vorgesehen, in den zwischen dem inneren Ende des Fadenleitkanales und der Fadenbremse sich aufbauenden Unterdruckraum Neben- bzw. Falschluftöffnungen einmünden zu lassen, deren Öffnungsquerschnitt veränderlich ist. Auf diese Weise besteht die Möglichkeit, den sich in diesem Unterdurckraum aufbauenden Unterdruck in Abhängikeit von den vorhandenen Betriebsparametern und dem gewünschten Zwirnergebnis veränderlich zu gestallten.In order to be able to adapt the effective vacuum force to the other operating parameters of the double-wire twisting spindle, such as bobbin geometry and yarn titer, provision is made according to another invention for secondary or false air openings to open into the vacuum space which is built up between the inner end of the thread guide channel and the thread brake. whose opening cross-section is variable. In this way, there is the possibility of the negative pressure building up in this underpressure space depending on the existing ones Operating parameters and the desired twisting result.
Im folgenden wird anhand der beigefügten Zeichnung ein Ausführungsbeispiel der erfindungsgemäßen Einrichtung näher erläutert.An exemplary embodiment of the device according to the invention is explained in more detail below with reference to the accompanying drawing.
In den Zeichnungen zeigen:
- Fig. 1
- in einer stark schematisierten, verkleinerten Teildarstellung die für die Erfindung wesentlichen Teile einer Doppeldraht-Zwirnspindel;
- Fig. 2
- in einer gegenüber Fig. 1 vergrößerten Darstellung den Fadenverlauf durch eine Doppeldraht-Zwirnspindel nach Fig. 1 mit einer üblichen Fadenbremse,
- Fig. 3
- in vergrößerter Darstellung einer Schnittansicht einer erfindungsgemäß gestalteten Doppel-Zwirnspindel.
- Fig. 1
- in a highly schematic, reduced partial representation, the parts of a double-wire twisting spindle essential for the invention;
- Fig. 2
- 1 enlarged representation of the thread course through a double wire twisting spindle according to FIG. 1 with a conventional thread brake,
- Fig. 3
- in an enlarged representation of a sectional view of a double twisting spindle designed according to the invention.
Fig. 1 zeigt die wesentlichen Teile einer Doppeldraht-Zwirnspindel bekannter Bauart, nämlich den Wirtel 1, den Drehteller 2 mit darunter angeordneter Fadenspeicherscheibe 2.1, den Spulenträger 3 mit dem Schutztopfboden 3.1 und das Fadeneinlaufrohr 4. Der Spulenträger 3 ist im Betrieb der Spindel gegenüber dem im wesentlichen den Wirtel 1, den Drehteller 2 und die Fadenspeicherscheibe 2.1 umfassenden Spindelrotor in Ruhe gehalten.Fig. 1 shows the essential parts of a double-wire twisting spindle of a known type, namely the
Während des Spindelbetriebes wird der Faden F von der Spule 5 nach oben abgezogen, in das Fadeneinlaufrohr 4 eingeführt und durch die Spindelholachse nach unten geführt. Unterhalb des Drehtellers 2 wird der Faden um 90o umgelenkt und durch den Fadenleitkanal 2.2 der Fadenspeicherscheibe 2.1 nach außen zur Ballonbildung geführt. Dabei umschlingt der Faden F in der in Fig. 2 schematisch dargestellten Weise zum Zwecke der Fadenspeicherung die nicht dargestellte Fadenspeicherscheibe 2.1. Der Umschlingungswinkel des Fadens ist in Fig. 2 mit bezeichnet und betragt dort ca. 360o. Je nach der gewünschten Speicherung kann dieser Fadenspeicherwinkel Werte von 0o bis über 360o annehmen, wobei ein Speicherwinkel von 0o bedeutet, daß der Faden nach dem Austritt aus dem Fadenleitkanal 2.1 lediglich um 90o umgelenkt und radial nach außen bzw. oben in den Fadenballon geführt wird.During spindle operation, the thread F is pulled up from the
Der nach dem Verlassen der Fadenspeicherscheibe 2.1 von dem Faden F gebildete Fadenballon wird in seinem Scheitel durch die Fadenführungsöse 10 begrenzt, von der aus der Faden in üblicher Weise zur einer nicht dargestellten Aufwickeleinrichtung weitergeführt wird.The thread balloon formed by the thread F after leaving the thread storage disk 2.1 is delimited at its apex by the
Der Fadenspeicherwinkel wird unter anderem, einerseits wesentlich durch die Spindeldrehzahl (Drehzahl des Spindelrotor) und andererseit auch durch die Einstellung der Fadenbremse bestimmt, die im Inneren der vom Faden F durchlaufenen Spindelholachse angeordnet und in Fig. 2 in üblicher Bauart, wie z.B. aus der DE-A-3 243 157 bekannt, und in Fig. 3 in erfindungsgemäßer Bauart dargestellt ist.The thread storage angle is determined, among other things, on the one hand essentially by the spindle speed (speed of the spindle rotor) and on the other hand also by the setting of the thread brake, which is arranged inside the spindle retraction axis through which the thread F passes and is shown in Fig. 2 in a conventional design, e.g. known from DE-A-3 243 157, and is shown in Fig. 3 in the inventive design.
Gemäß dem Figuren 2 und 3 ist eine durch eine Druckfeder belastete, als Kapselbremse ausgebildete Fadenbremse verwendet. Diese Fadenbremse umfasst als wesentliche Bestandteile obere und untere Bremsringe 6 bzw. 9, zwischen denen als Bremskörper die Bremskapsel 7 abgestützt ist, die teleskopartig aus einem Unterteil 7.2 und einem Oberteil 7.1 besteht und in der eine Druckfeder 8 angeordnet ist.According to FIGS. 2 and 3, a thread brake designed as a capsule brake is used which is loaded by a compression spring. This thread brake comprises, as essential components, upper and
Gemäß Fig. 3 ist der Spulenträger 3 mittels Lagern 11 gelagert; zu diesem Zweck schließt sich an den Schutztopfboden 3.1 eine innere Schutztopfnabe 3.2 an. Auf die Schutztopfnabe 3.2 ist ein Rotationskörper 12 aufgeschoben, der einen unteren Zylinderabschnitt 12.1 größeren Durchmessers, einen kegelstumpfförmigen Gehäuse Zwischenabschnitt 12.2 und einen oberen Zylinderabschnitt 12.3 mit gegenüber dem Abschnitt 12.1 kleinerem Durchmesser aufweist. Der Zwischenabschnitt 12.2 ist mit Öffnungen 12.21 versehen, deren Öffnungsquerschnitt mittels eines auf den Zwischenabschnitt 12.2 aufgesetzen Drehringes 15 veränderbar ist, der in dargestellter Weise Öffnungen aufweist, die mit den Öffnungen 12.21 in Gegenüberstellung bringbar sind.3, the
An das obere Ende des oberen Zylinderabschnittes 12.3 schließt sich ein nach innen gerichteter Nabenabschnitt 12.4 an, in den zentrisch der untere Bremsring 9 eingesetzt ist. Der Nabenabschnitt 12.4 ist mit seitlich an dem unteren Bremsring 9 vorbeigeführten Durchlässen 12.41 versehen.At the upper end of the upper cylinder section 12.3 there is an inwardly directed hub section 12.4 into which the
Auf den oberen Zylinderabschnitt 12.3 ist ein zylindrisches Bremsengehäuse 13 aufgesetzt, in dessen Oberteil das Fadeneinlaufrohr 4 eingesetzt ist.A
In dem Bremsengehäuse 13 ist ein axial verschiebbarer Kolben 14 untergebracht, der eine zentrale Öffnung aufweist, in die der die obere Bremsflache bildende Bremsring 6 eingesetzt ist.An axially displaceable piston 14 is accommodated in the
Bei umlaufender Spindel wirkt die Fadenspeicherscheibe mit ihren Fadenleitkanal 2.2. wie eine Zentrifugalpumpe, derart, daß innerhalb der Spindelhohlachse zwischen dem innern Ende des Fadenleitkanals 2.2 und dem Kolben 14 durch Zentrifugalkraft eine in Pfeilrichtung f2 wirkende Saugluftströmmung mit der Tendenz aufgebaut wird, daß bei ansteigender Drehzahl der Spindel bzw. der Fadenspeicherscheibe der Kolben 14 nach unten gezogen und dadurch die Bremskraft zwischen der Bremskapsel 7 und den Bremsringen 6 bzw. 9 erhöht wird. Dadurch wird erreicht, daß die von der Fadenbremse aufgebrachte innere Bremskraft und die Fadenspeicherung gemäß der eingangs beschrieben Gesetzmäßigkeit in dem gewünschten Gleichgewicht zu den Kräften des Fadensballon stehen.When the spindle rotates, the thread storage disc acts with its thread guide channel 2.2. like a centrifugal pump, such that within the hollow spindle axis Between the inner end of the thread guide channel 2.2 and the piston 14, a suction air flow acting in the direction of the arrow f2 is built up by centrifugal force with the tendency that with increasing speed of the spindle or the thread storage disk, the piston 14 is pulled down and thereby the braking force between the
Der Unterdruck steigt ebenfalls quadratisch mit der Drehzahl an. Die daraus resultierende veränderte Bremskraft der Innenbremse steigt deshalb auch in etwa quadratisch an.The vacuum also increases quadratically with the speed. The resulting change in the braking force of the inner brake therefore increases approximately square.
Damit auch auf grundlegende Veränderungen der Betriebsparameter der Doppeldraht-Zwirnspindel reagiert werden kann, z.B. bei Änderung der Garnnummer des Fadens F oder bei Änderung des Reibwertes des Fadenmaterials infolge Hinzufügens von textil Gleitmitteln oder dergleichen, kann dem im Bereich der Spindelhohlachse liegenden Unterdruckraum Neben- bzw. Falschluft durch die Öffnungen 12.21 in Richtung des Pfeiles f3 zugeführt werden. Die Menge dieser durch die Öffnungen 12.21 zugeführten Fremd- bzw. Falschluft kann durch Verstellen des Drehringes 15 reguliert werden. Durch mehr oder weniger Fremdluft wird die Höhe des Unterdruckes im Hohlraum verändert.So that you can also react to fundamental changes in the operating parameters of the double-wire twisting spindle, e.g. in the event of a change in the thread number of the thread F or a change in the coefficient of friction of the thread material due to the addition of textile lubricants or the like, secondary or false air can be supplied through the openings 12.21 in the direction of arrow f3 to the vacuum chamber located in the region of the spindle hollow axis. The amount of this external or false air supplied through the openings 12.21 can be regulated by adjusting the
Das erfindungsgemäße Prinzip läßt sich außer mit der beschriebenen Kapselbremse auch mit einer sogenannten Gitterbremse verwirklichen, bei der unter dem Einfluß eines sich ändernden Unterdrucks im Bereich der Spindelhohlachse der Abstand zwischen fingerartigen Bremskörpern verändert wird.In addition to the capsule brake described, the principle according to the invention can also be implemented with a so-called grid brake, in which under the influence a changing negative pressure in the region of the hollow spindle axis, the distance between finger-like brake bodies is changed.
Das erfindungsgemäße Prinzip läßt sich auch bei einer Teller- oder Plättchenbremse verwirklichen, bei der die Kraft auf zusammenwirkende Bremskörperelemente und Bremsflachen verändert wird, die an einem mit dem Kolben 14 vergleichbaren Kolbenelement innerhalb der Spindelhohlachse angeordnet sind.The principle according to the invention can also be implemented in a plate or plate brake, in which the force on interacting brake body elements and brake surfaces is changed, which are arranged on a piston element comparable to the piston 14 within the hollow spindle axis.
Claims (7)
- Procedure for varying the braking power of a yarn brake located in the hollow shaft of the spindle of a two-for-one twisting spindle, which has at least one braking surface (6) housed in a brake housing (13) and one braking body (7) lying against the braking surface (6), characterized in that the braking surface (6) forms a part of a piston (14) which is displaceable in axial direction in the brake housing (13), and upon which the flow of vacuum intake air (vacuum) produced inside the hollow shaft of the spindle by the rotating yarn storage disk (2.1) is brought to bear in such a way that this braking surface (6), with increasing number of revolutions of the yarn storage disk (2.1), is brought to rest against the braking body (7) with ever greater bearing pressure.
- Procedure according to Claim 1, characterized in that, for varying the power of the flow of vacuum intake air acting on the movable braking surface (6), secondary or external air is allowed to flow into the vacuum space formed by the rotating yarn storage disk.
- Procedure according to Claim 2, characterized in that the aperture cross-section of secondary-air inlet openings (12.21) leading into the vacuum space is varied.
- Two-for-one twisting spindle for application of the procedure according to Claim 1, with a yarn brake which is located above the yarn storage disk (2.1) in the region of the spindle's hollow shaft and which has at least one braking surface (6) housed in a brake housing (13) and one braking body (7) resting against the braking surface (6), characterized in that the braking surface (6) forms a part of a piston (14) which is displaceable in axial direction in the brake housing (13) and which limits the upper side of a vacuum chamber adjacent to the central opening of the yarn guiding channel (2.2) of the yarn storage disk (2.1).
- Two-for-one twisting spindle according to Claim 4, characterized by secondary-air inlet openings (12.21) which open into the vacuum chamber and of which the cross-section of the aperture can be varied.
- Two-for-one twisting spindle according to Claim 5, characterized in that the secondary-air inlet openings (12.21) are located on the circumference of an intermediate section (12.2) of the housing which is concentric to the spindle's hollow shaft and surrounds a part of the vacuum chamber, and on which a rotating ring (15) is mounted, which has openings which can be brought into position opposite the secondary-air inlet openings (12.21).
- Two-for-one twisting spindle according to Claim 4, the braking body being a braking capsule supported between lower and upper brake surface rings forming braking surfaces, characterized by passages (12.41) passing alongside the lower brake surface ring (9).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4021272A DE4021272C2 (en) | 1990-07-04 | 1990-07-04 | Double-wire twisting spindle with a thread brake arranged above the thread storage disc in the area of the hollow spindle axis |
| DE4021272 | 1990-07-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0464424A1 EP0464424A1 (en) | 1992-01-08 |
| EP0464424B1 true EP0464424B1 (en) | 1995-01-25 |
Family
ID=6409626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91109766A Expired - Lifetime EP0464424B1 (en) | 1990-07-04 | 1991-06-14 | Procedure for automatically regulating the braking force of a yarn brake situated in the hollow spindle of a two-for-one twisting spindle and two-for-one twisting spindle equipped with such a yarn brake |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0464424B1 (en) |
| JP (1) | JPH04245939A (en) |
| CZ (1) | CZ281395B6 (en) |
| DE (2) | DE4021272C2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008033849A1 (en) * | 2008-07-19 | 2010-01-21 | Oerlikon Textile Gmbh & Co. Kg | Method for operating a spindle of a double-twisting or cabling machine |
| CN107083599A (en) * | 2017-02-27 | 2017-08-22 | 绍兴易纺机械制造有限公司 | A kind of twister of twisting mill and the twisting mill using the twister |
| CN109811435B (en) * | 2019-03-19 | 2024-06-11 | 浙江自力机械有限公司 | Pneumatic spindle |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2662364A (en) * | 1947-12-20 | 1953-12-15 | North American Rayon Corp | Yarn tensioning means for twisters |
| DE1510845B1 (en) * | 1965-03-22 | 1970-07-23 | Palitex Project Co Gmbh | Yarn braking device on two-for-one twisting spindles |
| DE2914656C2 (en) * | 1979-04-11 | 1982-04-22 | Palitex Project-Company Gmbh, 4150 Krefeld | Thread brake especially for two-for-one twisting spindles |
| DE3104748C2 (en) * | 1981-02-11 | 1984-11-08 | Palitex Project-Company Gmbh, 4150 Krefeld | Thread brake that can be threaded through pneumatically, especially for a two-for-one twisting spindle |
| DE3118873C2 (en) * | 1981-05-13 | 1985-01-03 | Palitex Project-Company Gmbh, 4150 Krefeld | Two-for-one twisting spindle |
| DE3243157C2 (en) * | 1982-11-23 | 1985-01-24 | Palitex Project-Company Gmbh, 4150 Krefeld | Thread brake with associated threading device operated by compressed air, especially for two-for-one twisting spindles |
| DE3330523C1 (en) * | 1983-08-24 | 1984-09-06 | Palitex Project-Company Gmbh, 4150 Krefeld | Double-wire twisting spindle |
-
1990
- 1990-07-04 DE DE4021272A patent/DE4021272C2/en not_active Expired - Fee Related
-
1991
- 1991-06-14 EP EP91109766A patent/EP0464424B1/en not_active Expired - Lifetime
- 1991-06-14 DE DE59104373T patent/DE59104373D1/en not_active Expired - Fee Related
- 1991-06-20 JP JP3148240A patent/JPH04245939A/en active Pending
- 1991-07-03 CZ CS912048A patent/CZ281395B6/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0464424A1 (en) | 1992-01-08 |
| DE4021272C2 (en) | 1995-06-22 |
| CZ281395B6 (en) | 1996-09-11 |
| DE4021272A1 (en) | 1992-01-09 |
| DE59104373D1 (en) | 1995-03-09 |
| JPH04245939A (en) | 1992-09-02 |
| CS204891A3 (en) | 1992-02-19 |
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