EP0168571B1 - Twisting device for a moving fibre assembly - Google Patents

Twisting device for a moving fibre assembly Download PDF

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Publication number
EP0168571B1
EP0168571B1 EP85105493A EP85105493A EP0168571B1 EP 0168571 B1 EP0168571 B1 EP 0168571B1 EP 85105493 A EP85105493 A EP 85105493A EP 85105493 A EP85105493 A EP 85105493A EP 0168571 B1 EP0168571 B1 EP 0168571B1
Authority
EP
European Patent Office
Prior art keywords
twisting device
spring
friction
pressure rollers
fibre assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85105493A
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German (de)
French (fr)
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EP0168571A1 (en
Inventor
Louis Vignon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
Original Assignee
Heberlein Hispano SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Heberlein Hispano SA filed Critical Heberlein Hispano SA
Publication of EP0168571A1 publication Critical patent/EP0168571A1/en
Application granted granted Critical
Publication of EP0168571B1 publication Critical patent/EP0168571B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • D02G1/08—Rollers or other friction causing elements
    • D02G1/087—Rollers or other friction causing elements between the flanks of rotating discs

Definitions

  • Swirlers with which a running fiber aggregate, e.g. B. a yarn, a multifilament or a fiber sliver, a twist or false twist can be issued are known in many different versions.
  • swirl sensors are known with two counter-rotating friction disks with mutually facing end faces for rotating a fiber aggregate running between the friction disks and touching the two end faces. With these twist sensors, it is difficult to meter the force with which the two friction disks are pressed against the fiber aggregate at the thread contact point. The force must have a certain minimum size in order to ensure that the fiber aggregate is carried along by friction.
  • the object of the invention is to avoid such instabilities and irregularities in a swirl generator according to the preamble of claim 1.
  • a pressure roller for the flexible friction disc is arranged in front of and after the thread contact point of the friction discs in the direction of movement of the flexible friction disc, that the two pressure rollers are under spring load and that the distribution of the total pressure force on the two rollers is adjustable .
  • the two pressure rollers are preferably of a common element which is spring-loaded in the direction of the flexible friction disk, in particular a pivoted lever, carried and adjustable with respect to this element.
  • the pressure rollers can expediently be mounted on a carrier which is pivotally held on the spring-loaded element.
  • the swirl shown for a running fiber aggregate F, z. B. a yarn and / or a multifilament and / or a fiber sliver has in a known manner two counter-rotating friction disks 1 and 2 with facing end faces that touch the fiber aggregate F passed between the disks 1 and 2 in the area of a thread contact point B and in Move rotation.
  • One friction disc 1 is flexible; it is relatively thin and consists of rubber-elastic material, e.g. B. polyurethane.
  • the other friction disc 2 is practically rigid; which can consist of metal and have only one (not shown) friction lining made of rubber-elastic material.
  • the flexible friction disk 1 In the area of the thread contact point B, the flexible friction disk 1 is pressed by two pressure rollers 3 and 4 against the rigid friction disk 2 or against the fiber aggregate F passing between the two friction disks.
  • One pinch roller 3 is located in the direction of movement of the flexible friction disc 1 just before the thread contact point B (i.e., it touches the friction disc 1 shortly before the thread contact point B), while the other pressure roller 4 is arranged shortly after the thread contact point B.
  • the two pressure rollers 3 and 4 are rotatably mounted on a block-shaped carrier 5, which is pivotally attached to a spring-loaded element in the form of a lever 6 by means of a screw 7.
  • the lever 6 is pivotable about an axis 13 fixed to the frame.
  • At the other end of the lever 6 engages one end of a tension spring 8, the other end of which is anchored to a screw 9 which is screwed into a projection 10 fixed to the frame.
  • the size of the tensile force of the spring 8 can be adjusted.
  • the lever 6 converts this tensile force into a compressive force which presses the carrier 5 fastened on the lever 6 and thus the pressure rollers 3 and 4 in the direction of the flexible friction disk 1.
  • the end face of the friction disk 1 is pressed in the region of the thread contact point B against the fiber aggregate F and against the end face of the friction disk 2.
  • the carrier 5 is pivotally attached to the lever 6 by means of the screw 7. After loosening the screw 7, the carrier 5 can be pivoted with respect to the lever 6 about the axis of the screw 7, which is approximately parallel to the axes of the pressure rollers 3 and 4 and is approximately perpendicular to the axes of the friction disks 1 and 2. The carrier 5 can then be fixed in any pivot position by tightening the screw 7. The pivot position of the carrier 5 with respect to the lever 6 determines the distribution of the pressure force generated by the spring 8 between the two pressure rollers 3 and 4.
  • the two pressure rollers 3 and 4 are preferably arranged offset from one another along the direction of movement of the fiber aggregate F or the direction of their axes, as shown.
  • the swirl sensor also has a thread guide 11, which guides the running fiber aggregate F to the thread contact point B of the two friction disks 1 and 2.
  • the thread guide 11 is arranged as close as possible to the thread contact point B, i. H. close to the circumference of the friction discs 1 and 2. It can be conveniently attached to the lever 6, z. B. with screws 12, which extend through elongated holes (not shown) in the thread guide 11, so that this is adjustable in the alignment of the friction disks 1 and 2 transverse to the axis of the fiber aggregate F (arrow P in Fig. 3).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Treatment Of Fiber Materials (AREA)

Description

Drallgeber, mit denen einem laufenden Faseraggregat, z. B. einem Garn, einem Multifilament oder einer Faserlunte, ein Drall bzw. Falschdrall erteilt werden kann, sind in vielen verschiedenen Ausführungen bekannt. Unter anderem kennt man Drallgeber mit zwei gegenläufig drehbaren Reibscheiben mit einander zugekehrten Stirnflächen zum Drehen eines zwischen die Reibscheiben laufenden, die beiden Stirnflächen berührenden Faseraggregates. Bei diesen Drallgebern ist die Dosierung der Kraft schwierig, mit der die beiden Reibscheiben an der Fadenberührungsstelle gegen das Faseraggregat gedrückt werden. Die Kraft muss eine gewisse Mindestgrösse haben, um die Reibungsmitnahme des Faseraggregates zu gewährleisten. Wenn die Kraft jedoch zu gross ist, entsteht eine übermässige Reibung direkt zwischen den Stirnflächen der gegenläufig drehenden Reibscheiben, die in der Regel mit gummielastischen Reibbelägen versehen sind. Um eine bessere Dosierung der Andruckkraft zu ermöglichen, ist schon vorgeschlagen worden, eine der beiden Reibscheiben nachgiebig auszubilden und an der Fadenberührungsstelle mit einer federbelasteten Andruckrolle gegen die andere Reibscheibe zu drücken. Auch diese Anordnung ist jedoch noch unbefriedigend. Es können sich Unstabilitäten des Fadenlaufes und ungleichmässige Drehungserteilung ergeben.Swirlers with which a running fiber aggregate, e.g. B. a yarn, a multifilament or a fiber sliver, a twist or false twist can be issued, are known in many different versions. Among other things, swirl sensors are known with two counter-rotating friction disks with mutually facing end faces for rotating a fiber aggregate running between the friction disks and touching the two end faces. With these twist sensors, it is difficult to meter the force with which the two friction disks are pressed against the fiber aggregate at the thread contact point. The force must have a certain minimum size in order to ensure that the fiber aggregate is carried along by friction. However, if the force is too great, excessive friction arises directly between the end faces of the counter-rotating friction disks, which are usually provided with rubber-elastic friction linings. In order to enable a better metering of the pressing force, it has already been proposed to give one of the two friction disks a resilient design and to press them against the other friction disk at the thread contact point with a spring-loaded pressure roller. However, this arrangement is still unsatisfactory. Unstability of the thread run and uneven rotation can result.

Die Aufgabe der Erfindung besteht darin, bei einem Drallgeber nach dem Oberbegriff des Patentanspruchs 1 solche Unstabilitäten und Ungleichmässigkeiten zu vermeiden.The object of the invention is to avoid such instabilities and irregularities in a swirl generator according to the preamble of claim 1.

Die Aufgabe wird dadurch gelöst, dass in Bewegungsrichtung der biegsamen Reibscheibe vor und nach der Fadenberührungsstelle der Reibscheiben je eine Andruckrolle für die biegsame Reibscheibe angeordnet ist, dass die beiden Andruckrollen unter Federbelastung stehen und dass die Verteilung der Gesamt-Andruckkraft auf die beiden Rollen einstellbar ist.The object is achieved in that a pressure roller for the flexible friction disc is arranged in front of and after the thread contact point of the friction discs in the direction of movement of the flexible friction disc, that the two pressure rollers are under spring load and that the distribution of the total pressure force on the two rollers is adjustable .

Obwohl es an sich möglich wäre, die beiden Andruckrollen getrennt in Richtung zur biegsamen Reibscheibe und von dieser weg bewegbar zu führen und je mit einer eigenen Federbelastung zu versehen, sind die beiden Andruckrollen vorzugsweise von einem gemeinsamen, in Richtung zur biegsamen Reibscheibe federbelasteten Element, insbesondere einem schwenkbar gelagerten Hebel, getragen und bezüglich dieses Elementes verstellbar. Die Andruckrollen können dabei zweckmässig auf einem Träger gelagert sein, der schwenkbar auf dem federbelasteten Element gehalten ist. Eine solche Konstruktion ist nicht nur besonders einfach, sondern gestattet auch eine sehr genaue Einstellung der Verteilung der Gesamt-Andruckkraft.Although it would be possible per se to guide the two pressure rollers separately in the direction of the flexible friction disk and movable away from it and to provide each with its own spring load, the two pressure rollers are preferably of a common element which is spring-loaded in the direction of the flexible friction disk, in particular a pivoted lever, carried and adjustable with respect to this element. The pressure rollers can expediently be mounted on a carrier which is pivotally held on the spring-loaded element. Such a construction is not only particularly simple, but also allows a very precise adjustment of the distribution of the total pressure force.

In der Zeichnung ist ein bevorzugtes Ausführungsbeispiel des erfindungsgemässen Drallgebers schematisch dargestellt, und zwar zeigen :

  • Fig. 1 eine Vorderansicht eines Drallgebers,
  • Fig. 2 eine Seitenansicht und
  • Fig. 3 eine Draufsicht zu Fig. 1.
A preferred exemplary embodiment of the swirl sensor according to the invention is shown schematically in the drawing, namely:
  • 1 is a front view of a swirl generator,
  • Fig. 2 is a side view and
  • 3 is a top view of FIG. 1.

Der dargestellte Drallgeber für ein laufendes Faseraggregat F, z. B. eine Garn und/oder ein Multifilament und/oder eine Faserlunte, besitzt in bekannter Weise zwei gegenläufig drehbare Reibscheiben 1 und 2 mit einander zugekehrten Stirnflächen, die das zwischen den Scheiben 1 und 2 hindurchgeführte Faseraggregat F im Bereich einer Fadenberührungsstelle B berühren und in Drehung versetzen. Die eine Reibscheibe 1 ist biegsam ausgebildet; sie ist relativ dünn und besteht aus gummielastischem Material, z. B. Polyurethan. Dagegen ist die andere Reibscheibe 2 praktisch starr ; die kann aus Metall bestehen und lediglich einen (nicht dargestellten) Reibbelag aus gummielastischem Material aufweisen.The swirl shown for a running fiber aggregate F, z. B. a yarn and / or a multifilament and / or a fiber sliver, has in a known manner two counter-rotating friction disks 1 and 2 with facing end faces that touch the fiber aggregate F passed between the disks 1 and 2 in the area of a thread contact point B and in Move rotation. One friction disc 1 is flexible; it is relatively thin and consists of rubber-elastic material, e.g. B. polyurethane. In contrast, the other friction disc 2 is practically rigid; which can consist of metal and have only one (not shown) friction lining made of rubber-elastic material.

Im Bereich der Fadenberührungsstelle B wird die biegsame Reibscheibe 1 von zwei Andruckrollen 3 und 4 gegen die starre Reibscheibe 2 bzw. gegen das zwischen den beiden Reibscheiben hindurchlaufende Faseraggregat F gedrückt. Die eine Andruckrolle 3 ist in der Bewegungsrichtung der biegsamen Reibscheibe 1 kurz vor der.Fadenberührungsstelle B angeordnet (d. h., sie berührt die Reibscheibe 1 kurz vor der Fadenberührungsstelle B), während die andere Andruckrolle 4 kurz nach der Fadenberührungsstelle B angeordnet ist.In the area of the thread contact point B, the flexible friction disk 1 is pressed by two pressure rollers 3 and 4 against the rigid friction disk 2 or against the fiber aggregate F passing between the two friction disks. One pinch roller 3 is located in the direction of movement of the flexible friction disc 1 just before the thread contact point B (i.e., it touches the friction disc 1 shortly before the thread contact point B), while the other pressure roller 4 is arranged shortly after the thread contact point B.

Die beiden Andruckrollen 3 und 4 sind auf einem blockförmigen Träger 5 drehbar gelagert, der an einem federbelasteten Element in Form eines Hebels 6 mittels einer Schraube 7 schwenkbar befestigt ist. Der Hebel 6 ist um eine gestellfeste Achse 13 schwenkbar. Am anderen Ende des Hebels 6 greift ein Ende einer Zugfeder 8 an, deren anderes Ende an einer Schraube 9 verankert ist, die in einen gestellfesten Ansatz 10 geschraubt ist.The two pressure rollers 3 and 4 are rotatably mounted on a block-shaped carrier 5, which is pivotally attached to a spring-loaded element in the form of a lever 6 by means of a screw 7. The lever 6 is pivotable about an axis 13 fixed to the frame. At the other end of the lever 6 engages one end of a tension spring 8, the other end of which is anchored to a screw 9 which is screwed into a projection 10 fixed to the frame.

Durch Drehen der Schraube 9 im Ansatz 10 kann die Grösse der Zugkraft der Feder 8 eingestellt werden. Der Hebel 6 setzt diese Zugkraft in einer Druckkraft um, welche den auf dem Hebel 6 befestigten Träger 5 und damit die Andruckrollen 3 und 4 in Richtung zur biegsamen Reibscheibe 1 drückt. Dadurch wird die Stirnfläche der Reibscheibe 1 im Bereich der Fadenberührungsstelle B gegen das Faseraggregat F und gegen die Stirnfläche der Reibscheibe 2 gedrückt.By turning the screw 9 in the neck 10, the size of the tensile force of the spring 8 can be adjusted. The lever 6 converts this tensile force into a compressive force which presses the carrier 5 fastened on the lever 6 and thus the pressure rollers 3 and 4 in the direction of the flexible friction disk 1. As a result, the end face of the friction disk 1 is pressed in the region of the thread contact point B against the fiber aggregate F and against the end face of the friction disk 2.

Der Träger 5 ist am Hebel 6 wie schon erwähnt mittels der Schraube 7 schwenkbar befestigt. Nach Lösen der Schraube 7 kann der Träger 5 bezüglich des Hebels 6 um die Achse der Schraube 7, die zu den Achsen der Andruckrollen 3 und 4 etwa parallel ist und zu den Achsen der Reibscheiben 1 und 2 etwa senkrecht steht, verschwenkt werden. Danach kann der Träger 5 in jeder Schwenkstellung durch Anziehen der Schraube 7 fixiert werden. Die Schwenkstellung des Trägers 5 bezüglich des Hebels 6 bestimmt die Verteilung der mittels der Feder 8 erzeugten Andruckkraft auf die beiden Andruckrollen 3 und 4.As already mentioned, the carrier 5 is pivotally attached to the lever 6 by means of the screw 7. After loosening the screw 7, the carrier 5 can be pivoted with respect to the lever 6 about the axis of the screw 7, which is approximately parallel to the axes of the pressure rollers 3 and 4 and is approximately perpendicular to the axes of the friction disks 1 and 2. The carrier 5 can then be fixed in any pivot position by tightening the screw 7. The pivot position of the carrier 5 with respect to the lever 6 determines the distribution of the pressure force generated by the spring 8 between the two pressure rollers 3 and 4.

Um die beiden Andruckrollen 3 und 4 möglichst nahe der Fadenberührungsstelle B einwirken zu lassen, sind sie vorzugsweise wie dargestellt längs der Bewegungsrichtung des Faseraggregates F bzw. der Richtung ihrer Achsen gegeneinander versetzt angeordnet.In order to allow the two pressure rollers 3 and 4 to act as close as possible to the thread contact point B, they are preferably arranged offset from one another along the direction of movement of the fiber aggregate F or the direction of their axes, as shown.

Der Drallgeber besitzt ferner einen Fadenführer 11, der das laufende Faseraggregat F zu der Fadenberührungsstelle B der beiden Reibscheiben 1 und 2 leitet. Der Fadenführer 11 ist möglichst nahe bei der Fadenberührungsstelle B angeordnet, d. h. dicht neben dem Umfang der Reibscheiben 1 und 2. Er kann zweckmässig am Hebel 6 befestigt sein, z. B. mit Schrauben 12, die sich durch Langlöcher (nicht dargestellt) im Fadenführer 11 erstrecken, so dass dieser in der Flucht der Reibscheiben 1 und 2 quer zur Achse des Faseraggregates F verstellbar ist (Pfeil P in Fig. 3).The swirl sensor also has a thread guide 11, which guides the running fiber aggregate F to the thread contact point B of the two friction disks 1 and 2. The thread guide 11 is arranged as close as possible to the thread contact point B, i. H. close to the circumference of the friction discs 1 and 2. It can be conveniently attached to the lever 6, z. B. with screws 12, which extend through elongated holes (not shown) in the thread guide 11, so that this is adjustable in the alignment of the friction disks 1 and 2 transverse to the axis of the fiber aggregate F (arrow P in Fig. 3).

Claims (11)

1. Twisting device for a moving fibre assembly (F), including two friction discs (1, 2) rotatable in opposite directions and having end faces turned towards one another, for the twisting of the fibre assembly (F) running between the friction discs, one friction disc (1) being made flexible and being pressure roller-loaded towards the end face of the other friction disc (2), characterised in that two pressure rollers (3, 4) for the flexible friction disc (1) are arranged respectively before and after the thread contact point (B) of the friction discs (1, 2) in the direction of movement of the flexible friction disc (1), in that the two pressure rollers (3, 4) are under a spring load (8), and in that the distribution of the total pressing force to the two rollers (3, 4) is adjustable.
2. Twisting device according to Claim 1, characterised in that the two pressure rollers (3, 4) are carried by an element (6) which is spring-loaded in the direction of the flexible friction disc (1), and are adjustable relative to this element (6) to change the distribution of the total pressing force.
3. Twisting device according to Claim 2, characterised in that the two pressure rollers (3, 4) are mounted next to one another on a carrier (5) which is pivotably held on the spring-loaded element (6).
4. Twisting device according to Claim 3, characterised in that the carrier (5) can be fixed in any pivoting position relative to the spring-loaded element (6).
5. Twisting device according to Claim 3, characterised in that the two pressure rollers (3,
4) are offset relative to one another in the direction of movement of the fibre assembly (F).
6. Twisting device according to one of Claims 2 to 5, characterised in that the spring-loaded element (6) is a pivotably mounted lever.
7. Twisting device according to one of Claims 2 to 6, characterised in that the amount of spring load of the spring-loaded element (6) is adjustable.
8. Twisting device according to one of Claims 1 to 7, characterised by a thread guide (11) which is arranged immediately next to the periphery of the two friction discs (1, 2) for guiding the fibre assembly (F) to the thread contact point (B) of the friction discs (1, 2).
9. Twisting device according to Claims 2 and 8, characterised in that the thread guide (11) is attached to the spring-loaded element (6).
10. Twisting device according to Claim 8 or 9, characterised in that the thread guide (11) is adjustable transversely relative to the direction of movement of the fibre assembly (F) in line with the friction discs (1, 2).
EP85105493A 1984-06-22 1985-05-06 Twisting device for a moving fibre assembly Expired EP0168571B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3024/84 1984-06-22
CH3024/84A CH663224A5 (en) 1984-06-22 1984-06-22 SWIRLERS FOR A RUNNING FIBER UNIT.

Publications (2)

Publication Number Publication Date
EP0168571A1 EP0168571A1 (en) 1986-01-22
EP0168571B1 true EP0168571B1 (en) 1988-06-15

Family

ID=4246925

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85105493A Expired EP0168571B1 (en) 1984-06-22 1985-05-06 Twisting device for a moving fibre assembly

Country Status (5)

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US (1) US4633663A (en)
EP (1) EP0168571B1 (en)
JP (1) JPH0647765B2 (en)
CH (1) CH663224A5 (en)
DE (1) DE3563364D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4218107A1 (en) * 1991-06-21 1992-12-24 Rieter Ag Maschf Twister for false twist spinning - has discs with zones of different coefft. of friction at edges, and yarn guide strip to stabilise yarn movement through twist development zone

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102754026B (en) 2010-02-02 2015-10-07 拜耳知识产权有限责任公司 There is the photopolymer formulation that ester group writes monomer

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4377932A (en) * 1979-07-14 1983-03-29 Barmag Barmer Maschinenfabrik Ag Flexible belt yarn false twisting apparatus
US4370853A (en) * 1979-07-14 1983-02-01 Barmag Barmer Maschinenfabrik Ag Friction false twisting apparatus
US4370851A (en) * 1980-06-14 1983-02-01 Barmag Barmer Maschinenfabrik Ag Yarn false twisting apparatus having adjustable friction discs
US4408449A (en) * 1980-06-26 1983-10-11 Barmag Barmer Maschinenfabrik Ag Friction false twisting apparatus
DE3123670A1 (en) * 1980-07-09 1982-09-02 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Friction false twister
US4383405A (en) * 1980-09-08 1983-05-17 Barmag Barmer Maschinenfabrik Ag Yarn false twisting apparatus and method
US4400931A (en) * 1980-11-07 1983-08-30 Murata Kikai Kabushiki Kaisha Belt-type false twisting unit
DE3147966A1 (en) * 1981-06-26 1983-01-20 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Friction false twister

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4218107A1 (en) * 1991-06-21 1992-12-24 Rieter Ag Maschf Twister for false twist spinning - has discs with zones of different coefft. of friction at edges, and yarn guide strip to stabilise yarn movement through twist development zone

Also Published As

Publication number Publication date
JPS6112925A (en) 1986-01-21
EP0168571A1 (en) 1986-01-22
CH663224A5 (en) 1987-11-30
JPH0647765B2 (en) 1994-06-22
DE3563364D1 (en) 1988-07-21
US4633663A (en) 1987-01-06

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