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EP3666942B1 - Condensing unit with three contact surfaces, pressuring roller unit and drawing unit - Google Patents

Condensing unit with three contact surfaces, pressuring roller unit and drawing unit Download PDF

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Publication number
EP3666942B1
EP3666942B1 EP19204341.2A EP19204341A EP3666942B1 EP 3666942 B1 EP3666942 B1 EP 3666942B1 EP 19204341 A EP19204341 A EP 19204341A EP 3666942 B1 EP3666942 B1 EP 3666942B1
Authority
EP
European Patent Office
Prior art keywords
roller
drafting
condensing
contact surface
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19204341.2A
Other languages
German (de)
French (fr)
Other versions
EP3666942A1 (en
Inventor
Karlheinz Huber
Gernot Schaeffler
Gerd Stahlecker
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
Maschinenfabrik Rieter AG
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 Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP3666942A1 publication Critical patent/EP3666942A1/en
Application granted granted Critical
Publication of EP3666942B1 publication Critical patent/EP3666942B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/72—Fibre-condensing guides
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/44—Adjusting drafting elements, e.g. altering ratch
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/22—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by rollers only
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/74—Rollers or roller bearings

Definitions

  • the present invention relates to a compression unit for two next to each other arranged drafting devices of a textile machine with a holder, wherein a first and a second contact surface is arranged on the holder, which can rest on a drafting device roller during operation of the drafting device, a compression area being arranged on each of the contact surfaces is in order to be able to compress a fiber structure guided longitudinally through the compression area, the first and the second contact surface being spaced apart from one another transversely to the compression areas and with a coupling element for a traversing device for traversing the compression unit transversely to the two compression areas, as well as a pressure roller unit with a such a compression unit and a drafting system with such a pressure roller unit.
  • the drafting system comprises mechanical means for compressing the fiber structure drawn in the drafting system, which means have at least one guide surface which is each arranged at an angle to a transport direction of the fiber structure.
  • the drafting system has a traversing device which is coupled to compressor components which have the guide surfaces.
  • a changeable compressor unit for a drafting system of a textile machine in particular a ring spinning machine, is known.
  • the compressor unit has at least one guide with a contact surface which, when the drafting system is in operation, rests against a drafting system roller.
  • a fiber structure can be guided with the guide.
  • the contact surface is advantageously curved and in particular concave, the contact surface being adapted to a jacket surface of the drafting device roller.
  • the guide has a compression area so that the fiber structure is compressed by the compression area. It is displaceable in the axial direction of the drafting roller.
  • the compressor unit is positioned on the drafting roller by means of two contact surfaces which are arranged one behind the other in the running direction of the fiber structure.
  • the positioning of the compactor unit in relation to the drafting system is restricted by the two contact surfaces, in particular by the contact surface arranged in front of the first top roller.
  • the first top roller must be arranged relatively far away from the drafting system and the thread wrapping around the second top roller is quite large.
  • the object of the present invention is thus to create a compression unit, a pressure roller unit and a drafting system, in particular for a ring spinning machine, which enables the compression unit to be positioned in a stable manner and a uniform and stable thread to be spun.
  • the compressor unit according to the invention for two next to each other arranged drafting units of a textile machine, in particular a ring spinning machine has a holder on which a first and a second contact surface are arranged, which can bear against a drafting device roller when the drafting device is in operation.
  • a compression area is arranged on each of the contact surfaces in order to be able to compress a fiber structure guided longitudinally through the compression area.
  • the first and second contact surfaces are spaced apart from one another transversely to the compression areas.
  • a coupling element is arranged on the compressor unit for a traversing device for traversing the compressor unit transversely to the two compression areas.
  • the compressor unit has a third contact surface for supporting the compressor unit when the drafting system is in operation on the drafting system roller.
  • the third contact surface is arranged between the first and the second contact surface and offset along the length of the compression areas.
  • This third contact surface allows the compression unit to be supported very stably on the drafting system roller without the support hindering the close positioning of the compression unit and the pressure roller assembly on the other rollers of the drafting system.
  • This close positioning of the compression unit and the pressure roller assembly on the rollers of the drafting system also has the effect that the take-off roller of the pressure roller assembly can be positioned on the drafting system roller with which it interacts so that the yarn produced is only slightly wrapped around the take-off roller gives.
  • This low looping enables very stable spinning, which on the one hand produces a uniform thread and on the other hand, above all, produces few thread breaks.
  • the third contact surface or the element which has the contact surface forms the coupling element for the traversing device.
  • the contact surface thus guarantees, on the one hand, an exact positioning of the first and second contact surface in relation to the drafting device roller and, moreover, ensures that this is precisely positioned of the two contact surfaces is retained even when the compressor unit traverses. This avoids tilting of the compactor unit in relation to the drafting roller and the guidance of the fiber structure in the compacting area is also ensured during traversing without fibers being able to leave the compacting area laterally.
  • the traversing device thus has a defined contact surface in order to be able to apply a lateral force to the third contact surface.
  • flanks of the third contact surface are beveled, threading the contact surface into the traversing device is very easy.
  • the contact surface is lifted from the drafting system roller together with the pressure roller assembly for opening the drafting system, while the traversing device remains in its original position. If the drafting system is closed, the pressure roller assembly, together with the compactor unit, returns to the drafting system roller.
  • the third contact surface is coupled to the traversing device. This coupling is easier due to possible different positions of the traversing device and the compressor unit if the flanks of the third contact surface are beveled.
  • the third contact surface is arranged on the holder is particularly advantageous. This enables a stable design of the three contact surfaces. It has proven to be particularly advantageous if the holder with the three contact surfaces was injection-molded from plastic or, in the case of a particularly durable design, the contact surfaces themselves made of a wear-resistant material were added to the holder.
  • a receiving element for receiving the compactor unit in a pressure roller unit of the drafting units is arranged on the bracket, it can be ensured when the drafting unit is opened that the compacting unit is lifted from the drafting unit roller together with the pressure roller unit.
  • the receiving element can also serve to have a loading spring arranged thereon, for example, which presses the compactor unit firmly onto the drafting roller in order to allow safe guidance of the fiber structure without individual fibers being able to slide out of the compacting area laterally.
  • the first and the second contact surface preferably each have a curvature which essentially corresponds to a corrugated cylinder section of the drafting system roller intended for them, and the third contact surface has a length which protrudes into this cylinder section in order to be supported on a non-corrugated cylinder section of the drafting system roller to be able to, an exact contact of the first and second contact surface on the drafting roller is guaranteed without there being impermissible gaps.
  • a pressure roller assembly according to the invention for two side-by-side drafting units of a textile machine has a compression unit, a base body and two twin rollers, which consist of two pressure rollers and two take-off rollers and which are received in the base body.
  • the twin rollers can be placed on a common drafting roller.
  • the printing roller unit has at least one means for fastening the compressor unit to the base body of the printing roller unit.
  • the compression unit comprises a first and a second contact surface, which can bear against the drafting system roller when the drafting system is in operation.
  • a compression area is arranged on each of the contact surfaces in order to be able to compress a fiber structure guided longitudinally through the compression area.
  • the first and the second contact surface are transverse to the Compression areas spaced from each other and each arranged between the pressure roller and the take-off roller of the two roller twins.
  • the compression unit is movably arranged transversely to the two compression areas on the base body of the pressure roller assembly.
  • the compressor unit is designed as described above.
  • the compressor unit has a third contact surface for supporting the compressor unit when the drafting system is in operation on the drafting system roller.
  • the third contact surface is arranged between the first and the second contact surface and offset along the length of the compression areas. This arrangement of the third contact surface creates space to arrange the compressor unit rotated around the drafting device roller in different positions, which can be very close to the other drafting device rollers. Particularly when the position is very close to the other drafting rollers, the fixed arrangement of the further thread course in the ring spinning machine results in only a slight thread looping around the output roller. In particular, this enables more stable spinning with only a few thread breaks.
  • a drafting device is equipped with a drafting device roller at the outlet of the drafting device as well as with a pressure roller unit for two adjacent drafting devices of a textile machine, in particular a ring spinning machine.
  • the printing roller unit comprises a base body and two twin rollers, which consist of two printing rollers and two take-off rollers and which are received in the base body.
  • the twin rollers can be placed on the drafting roller.
  • a compression unit has a first and a second contact surface which, when the drafting system is in operation, bear against the drafting system roller.
  • a compression area is arranged on each of the contact surfaces in order to be able to compress a fiber structure guided longitudinally through the compression area.
  • the first and the second contact surface are transverse to the compression areas spaced from each other and are each arranged between the pressure roller and the take-off roller.
  • the drafting system has a traversing device.
  • the compressor unit comprises a coupling element for connecting the compressor unit to the traversing device and for traversing the compressor unit transversely to the two compression areas.
  • the compressor unit is designed as described above. It has a third contact surface for supporting the compressor unit when the drafting system is in operation on the drafting system roller.
  • the third contact surface is arranged between the first and the second contact surface and offset along the length of the compression areas.
  • the third contact surface forms the coupling element for the traversing device, then stable, tilt-free traversing of the compressor unit on the drafting roller is possible.
  • threading in and out, opening and closing the drafting system can be carried out quickly and easily.
  • the third contact surface advantageously has flanks for contacting the traversing device, this also helps for precise traversing of the compressor unit, since the flanks enable very good force introduction into the compressor unit.
  • the traversing device has a traversing tongue which engages around the third contact surface as a fork or eye.
  • the coupling between the compressor unit and the traversing tongue of the traversing device is particularly important when opening and closing the drafting system possible particularly quickly and reliably.
  • the traversing tongue as a fork or eye, a reliable coupling of the compressor unit with the traversing device is ensured at the same time.
  • the fork or eye has cheeks which interact with the flanks of the third contact surface. In this way, a flat contact can be established between the traversing tongue and the compressor unit, which ensures reliable traversing.
  • the threading of the third contact surface into the traversing device is particularly easy when the pressure roller assembly is placed on the drafting roller.
  • the beveled flanks or cheeks can still be safely threaded.
  • the traversing tongue preferably has a support surface for resting on the drafting device roller, the position of the traversing tongue in the horizontal direction is determined by the drafting device roller.
  • the traversing tongue is displaced in the axial direction of the drafting device roller, the traversing tongue is thus guided through the drafting device roller.
  • the compressor unit is coupled to the traversing tongue, this allows the third support surface or the element of the compressor unit which comprises the third support surface to be inserted into the corresponding opening of the traversing tongue without the traversing tongue being able to deviate in the vertical direction.
  • the pressure roller forms a negative curtain on the drafting unit roller is particularly advantageous.
  • the angle between a drafting system line and a line which runs through the center points of the drafting system roller and the pressure roller is less than 90 °. This achieves particularly good guidance of the fiber structure when it enters a nipping point between the pressure roller and the drafting device roller.
  • take-off roller is wrapped around the draw-off roller at an angle of less than 90 °, preferably less than 30 °, by a thread emerging from the drafting device. This significantly increases the spinning stability, since fewer thread breaks are to be expected.
  • Figure 1 shows a longitudinal section through a closed drafting device 1 according to the invention.
  • the drafting device 1 has a pair of input rollers 2, a pair of drafting aprons 3 and output rollers 4.
  • a pressure roller 6 and a take-off roller 7 are arranged on a lower drafting device roller 5.
  • a roller 2.2 of the input roller pair 2 shown above, an upper apron 3.2 and the pressure roller 6 and the take-off roller 7 rest on a lower roller 2.1, an apron 3.1 and the drafting roller 5.
  • the printing roller 6 and the take-off roller 7 are arranged in a printing roller assembly 8.
  • the pressure roller assembly 8 comprises a base body 9 and a spring 10 which acts on a compressor unit 11.
  • Upper roller 2.2, upper apron 3.2 and the pressure roller assembly 8 with the pressure roller 6 and the take-off roller 7 are fastened in a pressure arm, not shown, of the drafting system 1.
  • the pressure roller 6 and the take-off roller 7 are each designed as roller twins, i.e. This means that two adjacent drafting units 1 can be operated via a pressure arm and that two of the rollers 6, 7 are connected to one another via a common axis.
  • the compressor unit 11 arranged in the pressure roller assembly 8 has a first contact surface 12, a second contact surface 13 (not visible in this illustration) and a third contact surface 14.
  • the first and second contact surfaces 12, 13 are each located between the pressure roller 6 and the take-off roller 7.
  • the third contact surface 14 is arranged between the axially spaced pressure rollers 6 of the roller twin.
  • the first, second and third contact surfaces 12, 13, 14 are supported on the drafting device roller 5. They preferably have a curvature which essentially corresponds to the cylindrical shape of the drafting device roller 5.
  • the spring 10 With the spring 10, the compressor unit 11 with its contact surfaces 12, 13 and 14 pressed onto the drafting device roller 5.
  • the spring 10 is rotatably connected to a receiving element 23 of the compressor unit 11.
  • the first, second and third contact surfaces 12, 13 and 14 are arranged on a holder 24 of the compressor unit 11. While the first and second contact surfaces 12, 13 are spaced apart from one another in the axial direction of the pressure roller 6 and the take-off roller 7, the third contact surface 14 is arranged and located essentially centrally between the two first and second contact surfaces 12, 13 in the axial direction spaced from these in the circumferential direction of the drafting roller 5. As a result, the third contact surface 14 is able to effect a positionally accurate support of the first and second contact surface 12, 13. The first and second contact surface 12, 13 are thus arranged very stably on the drafting device roller 5 due to the third contact surface 14. This means that they can be assigned to one another very precisely. The precisely positioned arrangement of the first and second contact surface 12, 13 by the third contact surface 14 ensures that a fiber structure 17 can be reliably guided in the compressor unit 11 without fibers of the fiber structure 17 being able to escape laterally from the compressor unit 11.
  • a particular advantage of this support of the contact surfaces 12, 13 by the third contact surface 14 is that the pressure roller unit 8 can be rotated around the drafting unit roller 5 in such a way that a negative curtain angle 20 of the printing roller 6 with respect to the drafting unit roller 5 can be set.
  • the negative curtain angle 20 means that the center of the pressure roller 12 is arranged in front of the center of the pressure roller 5 in relation to the running direction of the fiber structure 17.
  • This also has the effect that a wrap angle 21 of the fiber structure 17 on the take-off roller 7 is small, ie less than 90 °, preferably less than 30 °.
  • a very stable spinning is brought about by this small angle of wrap 21, since thread breaks can be significantly reduced as a result.
  • Negative curtain angles 20 or the printing roller assembly 8 rotated in this way are possible because the first and second contact surfaces 12, 13 are not supported between the pressure roller 6 and the apron 3.2, but laterally offset between the pressure rollers 6 of two adjacent drafting units 1.
  • the compressor unit 11 is coupled to a traversing tongue 15 of the traversing device.
  • the traversing tongue 15 is also connected to a compressor 16 which guides the fiber structure 17 into the drafting system 1.
  • the coupling of the traversing tongue 15 to the compressor unit 11 takes place with a fork 18 which engages around the compressor unit 11 in the area of the third contact surface 14.
  • the third contact surface 14 thus forms a coupling element for the traversing device.
  • the coupling is designed in such a way that the compressor unit 11 can slide upwards out of the traversing tongue 15 or the fork 18 when the drafting device 1 is opened. If the drafting system 1 is closed again, the compressor unit 11 or the third contact surface 14 is reinserted into the fork 18 of the traversing tongue 15.
  • the traversing tongue 15 is able, when it is moved back and forth in the axial direction of the rollers, to move the compressor unit 11 back and forth in the same way.
  • This traversing of the compressor unit 11 has the effect that the fiber structure 17 is clamped at different axial points of the pressure roller 6 or take-off roller 7 on the drafting unit roller 5.
  • the wear on the pressure roller 6 or take-off roller 7 is reduced as a result, since the contact points can be constantly changed.
  • the traversing tongue 15 or the fork 18 has a contact surface 19 with which it rests on the drafting device roller 5. This bearing surface 19 thus slides back and forth in the axial direction when the traversing tongue 15 is traversed axially on the drafting device roller 5.
  • FIG. 2 shows a longitudinal section through the drafting system 1 from Figure 1 in the open position.
  • the upper input roller 2.2, the upper apron 3.2 and the pressure roller assembly 8 with the pressure roller 6 and the take-off roller 7 are lifted from the lower roller 2.2, the apron 3.1 and the drafting unit roller 5.
  • the compressor unit 11, together with the pressure roller assembly 8 is removed from the coupling with the traversing tongue 15 or its fork 18.
  • the third contact surface 14 is thus removed from the fork 18.
  • the traversing tongue 15 and the fork 18 remain on the drafting roller 5 by means of the support surface 19.
  • the compressor unit 11 is lowered again together with the other components, whereby the third contact surface 14 comes back into the fork 18, rests on the pressure roller 5 and can be guided laterally through the fork 18, as in FIG Figure 1 shown.
  • FIG 3 a view from below of a compressor unit 11 according to the invention is shown.
  • the central component of the compressor unit 11 is the holder 24.
  • the first, second and third contact surfaces 12, 13 and 14 are arranged at the respective ends of the holder 24.
  • a compression area 22 is present in each of the first and second contact surfaces 12, 13.
  • the fiber structure 17 arrives in this compression area 22 and is compressed therein.
  • the compressor unit 11 is connected to the pressure roller assembly 8 by means of the spring 10 (see Figure 1 and 2 ).
  • the coupling between the traversing tongue 15 and the compressor unit 11 takes place via the holder 24 or the shape of the holder 24 in the area of the third bearing surface 14.
  • the fork 18 of the traversing tongue 15 encompasses the holder 24 or the third bearing surface 14 laterally.
  • the contact points between the third contact surface 14 and the fork 18 of the traversing tongue 15 are cheeks 25 of the tongue 15 and flanks 33 of the third contact surface 14 or the holder 24. It is advantageous if there is little play between the cheeks 25 and the flanks 33 is to facilitate threading when coupling the compressor unit 11 with the traversing tongue 15.
  • the cheeks 25 are designed to be beveled for easier threading.
  • the cheeks 25 are designed to be beveled for easier threading.
  • Figure 4 shows a plan view of lower rollers of the drafting system 1 according to the invention and the traversing device which comprises the traversing tongue 15 and a traversing rod 28.
  • the illustration also shows two drafting devices 1 arranged parallel to one another.
  • the traversing tongue 15 is arranged between the two drafting devices 1.
  • the traversing tongue 15 is also attached to the traversing rod 28 and can be traversed back and forth in the direction of the double arrow C.
  • the traversing tongue 15 now has an eyelet 29 instead of a fork 18.
  • the contact surface 19 of the traversing tongue 15 can be made wider and more stable through the eyelet 29.
  • the representation of this Figure 4 also shows the structure of the drafting unit roller 5.
  • This drafting unit roller 5 has cylinder sections which have corrugated areas 26 and smooth areas 27.
  • the first and second contact surfaces 12, 13 lie on the corrugated areas 26 on the drafting device roller 5.
  • the third contact surface 14, on the other hand, is located between the two drafting devices 1 in the smooth area or cylinder section 27 of the drafting device roller 5 and is supported there.
  • a dashed line shows a pressure line 30 for the pressure roller 6 and a pressure line 31 for the take-off roller 7.
  • the pressure line 30 for the pressure roller 6 is offset in the direction of the lower aprons 3.1 with respect to a center line S of the drafting device roller 5.
  • a curtain V thus becomes negative. This is possible because the support for the first and second contact surfaces 12, 13 is not arranged between the apron 3.1 and the pressure roller 6, but laterally offset thereto in the smooth area 27 of the drafting unit roller 5.
  • This also causes the pressure line 31 of the take-off roller 7 to migrate closer to the center line S and thus has the effect that the wrapping around the take-off roller 7 by the fiber structure 17 is only very slight.
  • FIG. 5 a sectional front view of the drafting device 1 according to the invention is shown.
  • the cut is made through the first, second and third contact surfaces 12, 13 and 14.
  • the compression area 22 can be seen, which forms a channel through which the fiber structure 17 can be conveyed.
  • the two contact surfaces 12 and 13 lie on the corrugated area 26 of the drafting device roller 5.
  • the third contact surface 14 can be seen between the two first and second contact surfaces 12 and 13. This third contact surface 14 rests in the smooth area 27 of the drafting device roller 5.
  • the support surface 19 of the traversing tongue 15 also rests in this area.
  • both the cheeks 25 of the traversing tongue 15 and the flanks 33 of the third contact surface 14 are beveled. This makes it very easy to thread the third contact surface 14 into the fork 18 or eyelet 29 of the traversing tongue 15, even if there should be a certain offset between the traversing tongue 15 and the third contact surface 14.
  • the corrugated area 26 of the drafting roller 5 has a slightly larger diameter than the smooth area 27 of the drafting roller 5.
  • a corresponding height offset h is between the first and second contact surface 12, 13 and the third contact surface 14 are present.
  • the third contact surface 14 or its holder 24 thus has a length which compensates for this difference in diameter of the drafting device roller 5.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Description

Die vorliegende Erfindung betrifft eine Verdichtereinheit für zwei nebeneinander angeordnete Streckwerke einer Textilmaschine mit einer Halterung, wobei an der Halterung eine erste und eine zweite Anlagefläche angeordnet ist, die bei einem Betrieb des Streckwerks an einer Streckwerkswalze anliegen können, wobei an jeder der Anlageflächen ein Verdichtungsbereich angeordnet ist, um einen längs durch den Verdichtungsbereich geführten Faserverband verdichten zu können, wobei die erste und die zweite Anlagefläche quer zu den Verdichtungsbereichen voneinander beabstandet sind und mit einem Kopplungselement für eine Changiereinrichtung zum Changieren der Verdichtereinheit quer zu den beiden Verdichtungsbereichen, sowie ein Druckwalzenaggregat mit einer solchen Verdichtereinheit und ein Streckwerk mit einem solchen Druckwalzenaggregat.The present invention relates to a compression unit for two next to each other arranged drafting devices of a textile machine with a holder, wherein a first and a second contact surface is arranged on the holder, which can rest on a drafting device roller during operation of the drafting device, a compression area being arranged on each of the contact surfaces is in order to be able to compress a fiber structure guided longitudinally through the compression area, the first and the second contact surface being spaced apart from one another transversely to the compression areas and with a coupling element for a traversing device for traversing the compression unit transversely to the two compression areas, as well as a pressure roller unit with a such a compression unit and a drafting system with such a pressure roller unit.

Aus der EP 1 953 275 B1 ist ein Streckwerk in einer Ringspinnmaschine zum Verziehen eines Faserverbandes bekannt. Das Streckwerk umfasst mechanische Mittel zum Verdichten des im Streckwerk verzogenen Faserverbandes, welche wenigstens eine Führungsfläche aufweisen, die jeweils schräg zu einer Transportrichtung des Faserverbandes angeordnet ist. Außerdem weist das Streckwerk eine Changiereinrichtung auf, die an Verdichterbauteile gekoppelt ist, die die Führungsflächen aufweisen. Mittels der Changiereinrichtung kann die Lebensdauer der Streckwerkswalzen verlängert werden, da der Faserverband durch die Changiereinrichtung über die Mantelfläche der Streckwerkswalzen bzw. der Streckwerkswalzen verschoben wird. Dadurch wird ein Einschneiden des Faserverbandes an einer Stelle der Streckwerkswalze verhindert. Nachteilig dabei ist jedoch, wenn während des geöffneten Streckwerks die Changiereinrichtung gegenüber den Verdichterbauteilen verschoben wird. Um die Verdichterbauteile mit der Changiereinrichtung wieder verbinden zu können, ist ein Spiel an der Verbindungsstelle zwischen der Changiereinrichtung und den Verdichterbauteilen vorgesehen. Die Positionierung und Changierung der Verdichterbauteile kann damit nur ungenau erfolgen.From the EP 1 953 275 B1 a drafting system in a ring spinning machine for drawing a fiber structure is known. The drafting system comprises mechanical means for compressing the fiber structure drawn in the drafting system, which means have at least one guide surface which is each arranged at an angle to a transport direction of the fiber structure. In addition, the drafting system has a traversing device which is coupled to compressor components which have the guide surfaces. By means of the traversing device, the service life of the drafting rollers can be extended, since the fiber structure is shifted by the traversing device over the surface of the drafting rollers or the drafting rollers. This prevents the fiber structure from cutting in at one point on the drafting device roller. However, it is disadvantageous here if the traversing device is displaced relative to the compressor components while the drafting system is open. In order to be able to reconnect the compressor components to the traversing device, there is play at the connection point between the traversing device and the compressor components. The positioning and traversing of the compressor components can only be done imprecisely.

Aus der EP 3 124 660 A1 ist eine changierbare Verdichtereinheit für ein Streckwerk einer Textilmaschine, insbesondere einer Ringspinnmaschine, bekannt. Die Verdichtereinheit weist zumindest eine Führung mit einer Anlagefläche auf, die bei einem Betrieb des Streckwerks an einer Streckwerkswalze anliegt. Mit der Führung kann ein Faserverband geführt werden. Die Anlagefläche ist dabei vorteilhafterweise gekrümmt und insbesondere konkav ausgebildet, wobei die Anlagefläche an eine Mantelfläche der Streckwerkswalze angepasst ist. Die Führung weist einen Verdichtungsbereich auf, so dass der Faserverband durch den Verdichtungsbereich verdichtet wird. Sie ist in axialer Richtung der Streckwerkswalze verschiebbar. Eine Positionierung der Verdichtereinheit auf der Streckwerkswalze erfolgt mittels zweier Anlageflächen, die in Laufrichtung des Faserverbandes hintereinander angeordnet sind. Durch die beiden Anlageflächen, insbesondere durch die vor der ersten Oberwalze angeordnete Anlagefläche, ist die Positionierung der Verdichtereinheit in Bezug auf das Streckwerk eingeschränkt. Die erste Oberwalze muss relativ weit von dem Streckwerk entfernt angeordnet sein und die Umschlingung der zweiten Oberwalze durch den Faden ist recht groß.From the EP 3 124 660 A1 a changeable compressor unit for a drafting system of a textile machine, in particular a ring spinning machine, is known. The compressor unit has at least one guide with a contact surface which, when the drafting system is in operation, rests against a drafting system roller. A fiber structure can be guided with the guide. The contact surface is advantageously curved and in particular concave, the contact surface being adapted to a jacket surface of the drafting device roller. The guide has a compression area so that the fiber structure is compressed by the compression area. It is displaceable in the axial direction of the drafting roller. The compressor unit is positioned on the drafting roller by means of two contact surfaces which are arranged one behind the other in the running direction of the fiber structure. The positioning of the compactor unit in relation to the drafting system is restricted by the two contact surfaces, in particular by the contact surface arranged in front of the first top roller. The first top roller must be arranged relatively far away from the drafting system and the thread wrapping around the second top roller is quite large.

Aufgabe der vorliegenden Erfindung ist es somit eine Verdichtereinheit, ein Druckwalzenaggregat und ein Streckwerk, insbesondere für eine Ringspinnmaschine, zu schaffen, die eine stabile Positionierung der Verdichtereinheit und das Spinnen eines gleichmäßigen und stabilen Fadens ermöglicht.The object of the present invention is thus to create a compression unit, a pressure roller unit and a drafting system, in particular for a ring spinning machine, which enables the compression unit to be positioned in a stable manner and a uniform and stable thread to be spun.

Die Aufgabe wird gelöst durch eine Verdichtereinheit, ein Druckwalzenaggregat und ein Streckwerk mit den Merkmalen der unabhängigen Patentansprüche.The object is achieved by a compression unit, a pressure roller unit and a drafting system with the features of the independent claims.

Die erfindungsgemäße Verdichtereinheit für zwei nebeneinander angeordnete Streckwerke einer Textilmaschine, insbesondere einer Ringspinnmaschine, weist eine Halterung auf, an der eine erste und eine zweite Anlagefläche angeordnet ist, die bei einem Betrieb des Streckwerks an einer Streckwerkswalze anliegen können. An jeder der Anlageflächen ist ein Verdichtungsbereich angeordnet, um einen längs durch den Verdichtungsbereich geführten Faserverband verdichten zu können. Die erste und die zweite Anlagefläche sind quer zu den Verdichtungsbereichen voneinander beabstandet. Ein Kopplungselement ist an der Verdichtereinheit angeordnet für eine Changiereinrichtung zum Changieren der Verdichtereinheit quer zu den beiden Verdichtungsbereichen.The compressor unit according to the invention for two next to each other arranged drafting units of a textile machine, in particular a ring spinning machine, has a holder on which a first and a second contact surface are arranged, which can bear against a drafting device roller when the drafting device is in operation. A compression area is arranged on each of the contact surfaces in order to be able to compress a fiber structure guided longitudinally through the compression area. The first and second contact surfaces are spaced apart from one another transversely to the compression areas. A coupling element is arranged on the compressor unit for a traversing device for traversing the compressor unit transversely to the two compression areas.

Erfindungsgemäß weist die Verdichtereinheit eine dritte Anlagefläche zur Abstützung der Verdichtereinheit bei einem Betrieb des Streckwerks an der Streckwerkswalze auf. Die dritte Anlagefläche ist zwischen der ersten und der zweiten Anlagefläche und längs zu den Verdichtungsbereichen versetzt angeordnet. Durch diese dritte Anlagefläche kann die Verdichtereinheit sehr stabil auf der Streckwerkswalze abgestützt werden, ohne dass die Abstützung eine nahe Positionierung der Verdichtereinheit und des Druckwalzenaggregats an den übrigen Walzen des Streckwerks behindern würde. Durch diese nahe Positionierung der Verdichtereinheit und des Druckwalzenaggregats an den Walzen des Streckwerks wird darüber hinaus bewirkt, dass die Abzugswalze des Druckwalzenaggregats so an der Streckwerkswalze, mit welcher sie zusammenwirkt, positioniert werden kann, dass es nur eine geringe Umschlingung des erzeugten Fadens mit der Abzugswalze gibt. Diese geringe Umschlingung ermöglicht ein sehr stabiles Spinnen, welches einerseits einen gleichmäßigen Faden und andererseits vor allem wenig Fadenbrüche erzeugt.According to the invention, the compressor unit has a third contact surface for supporting the compressor unit when the drafting system is in operation on the drafting system roller. The third contact surface is arranged between the first and the second contact surface and offset along the length of the compression areas. This third contact surface allows the compression unit to be supported very stably on the drafting system roller without the support hindering the close positioning of the compression unit and the pressure roller assembly on the other rollers of the drafting system. This close positioning of the compression unit and the pressure roller assembly on the rollers of the drafting system also has the effect that the take-off roller of the pressure roller assembly can be positioned on the drafting system roller with which it interacts so that the yarn produced is only slightly wrapped around the take-off roller gives. This low looping enables very stable spinning, which on the one hand produces a uniform thread and on the other hand, above all, produces few thread breaks.

Besonders vorteilhaft ist es, wenn die dritte Anlagefläche bzw. das Element, welches die Anlagefläche aufweist, das Kopplungselement für die Changiereinrichtung bildet. Die Anlagefläche garantiert damit einerseits eine exakte Positionierung der ersten und zweiten Anlagefläche in Bezug auf die Streckwerkswalze und bewirkt darüber hinaus, dass diese exakte Positionierung der beiden Anlageflächen auch bei einer Changierung der Verdichtereinheit erhalten bleibt. Es werden damit Verkantungen der Verdichtereinheit in Bezug auf die Streckwerkswalze vermieden und die Führung des Faserverbandes in dem Verdichtungsbereich wird damit auch während der Changierung gewährleistet, ohne dass Fasern den Verdichtungsbereich seitlich verlassen können.It is particularly advantageous if the third contact surface or the element which has the contact surface forms the coupling element for the traversing device. The contact surface thus guarantees, on the one hand, an exact positioning of the first and second contact surface in relation to the drafting device roller and, moreover, ensures that this is precisely positioned of the two contact surfaces is retained even when the compressor unit traverses. This avoids tilting of the compactor unit in relation to the drafting roller and the guidance of the fiber structure in the compacting area is also ensured during traversing without fibers being able to leave the compacting area laterally.

Weist die dritte Anlagefläche Flanken zur Kontaktierung mit der Changiereinrichtung auf, so ist ein exaktes Verschieben quer zur Laufrichtung des Faserverbandes bzw. zum Verdichtungsbereich ermöglicht. Die Changiereinrichtung hat damit eine definierte Angriffsfläche um eine seitliche Kraft auf die dritte Anlagefläche aufbringen zu können.If the third contact surface has flanks for making contact with the traversing device, an exact shifting transversely to the running direction of the fiber structure or to the compression area is made possible. The traversing device thus has a defined contact surface in order to be able to apply a lateral force to the third contact surface.

Sind die Flanken der dritten Anlagefläche abgeschrägt, so ist ein Einfädeln der Anlagefläche in die Changiereinrichtung sehr einfach möglich. Die Anlagefläche wird nämlich zusammen mit dem Druckwalzenaggregat zum Öffnen des Streckwerks von der Streckwerkswalze abgehoben, während die Changiereinrichtung in ihrer ursprünglichen Position verbleibt. Wird das Streckwerk geschlossen, so gelangt das Druckwalzenaggregat zusammen mit der Verdichtereinheit wieder auf die Streckwerkswalze. Um ein Changieren der Verdichtereinheit zu ermöglichen, wird dabei die dritte Anlagefläche mit der Changiereinrichtung gekoppelt. Dieses Koppeln ist aufgrund möglicher unterschiedlicher Positionen der Changiereinrichtung und der Verdichtereinheit leichter möglich, wenn die Flanken der dritten Anlagefläche abgeschrägt sind.If the flanks of the third contact surface are beveled, threading the contact surface into the traversing device is very easy. The contact surface is lifted from the drafting system roller together with the pressure roller assembly for opening the drafting system, while the traversing device remains in its original position. If the drafting system is closed, the pressure roller assembly, together with the compactor unit, returns to the drafting system roller. In order to enable the compressor unit to traverse, the third contact surface is coupled to the traversing device. This coupling is easier due to possible different positions of the traversing device and the compressor unit if the flanks of the third contact surface are beveled.

Besonders vorteilhaft ist es, wenn die dritte Anlagefläche an der Halterung angeordnet ist. Damit ist eine stabile Ausführung der drei Anlageflächen möglich. Es hat sich insbesondere als vorteilhaft erwiesen, wenn die Halterung mit den drei Anlageflächen aus Kunststoff gespritzt wurde oder bei einer besonders dauerhaften Ausführung die Anlageflächen selbst aus einem verschleißfesten Material dem Halter hinzugefügt wurden.It when the third contact surface is arranged on the holder is particularly advantageous. This enables a stable design of the three contact surfaces. It has proven to be particularly advantageous if the holder with the three contact surfaces was injection-molded from plastic or, in the case of a particularly durable design, the contact surfaces themselves made of a wear-resistant material were added to the holder.

Ist in einer vorteilhaften Ausführung der Erfindung an der Halterung ein Aufnahmeelement zur Aufnahme der Verdichtereinheit in einem Druckwalzenaggregat der Streckwerke angeordnet, so kann bei einem Öffnen des Streckwerks sichergestellt werden, dass die Verdichtereinheit zusammen mit dem Druckwalzenaggregat von der Streckwerkswalze abgehoben wird. Das Aufnahmeelement kann weiterhin dafür dienen, dass daran beispielsweise eine Belastungsfeder angeordnet ist, welche die Verdichtereinheit fest auf die Streckwerkswalze anpresst, um eine sichere Führung des Faserverbandes zu gestatten, ohne dass einzelne Fasern aus dem Verdichtungsbereich seitlich herausgleiten könnten.If, in an advantageous embodiment of the invention, a receiving element for receiving the compactor unit in a pressure roller unit of the drafting units is arranged on the bracket, it can be ensured when the drafting unit is opened that the compacting unit is lifted from the drafting unit roller together with the pressure roller unit. The receiving element can also serve to have a loading spring arranged thereon, for example, which presses the compactor unit firmly onto the drafting roller in order to allow safe guidance of the fiber structure without individual fibers being able to slide out of the compacting area laterally.

Weist die erste und die zweite Anlagefläche vorzugsweise jeweils eine Wölbung auf, die im Wesentlichen einen geriffelten Zylinderabschnitt der für sie bestimmten Streckwerkswalze entspricht, und weist die dritte Anlagefläche eine Länge auf, die in diesen Zylinderabschnitt hineinragt, um sich an einem ungeriffelten Zylinderabschnitt der Streckwerkswalze abstützen zu können, so ist eine exakte Anlage der ersten und zweiten Anlagefläche an der Streckwerkswalze gewährleistet, ohne dass es unzulässige Spalte gibt.The first and the second contact surface preferably each have a curvature which essentially corresponds to a corrugated cylinder section of the drafting system roller intended for them, and the third contact surface has a length which protrudes into this cylinder section in order to be supported on a non-corrugated cylinder section of the drafting system roller to be able to, an exact contact of the first and second contact surface on the drafting roller is guaranteed without there being impermissible gaps.

Ein erfindungsgemäßes Druckwalzenaggregat für zwei nebeneinander angeordnete Streckwerke einer Textilmaschine weist eine Verdichtereinheit, einem Grundkörper und zwei Walzenzwillinge auf, die aus zwei Druckwalzen und zwei Abzugswalzen bestehen und die in dem Grundkörper aufgenommen sind. Die Walzenzwillinge sind auf eine gemeinsame Streckwerkswalze aufsetzbar. Das Druckwalzenaggregat weist wenigstens ein Mittel zum Befestigen der Verdichtereinheit am Grundkörper des Druckwalzenaggregats auf. Die Verdichtereinheit umfasst eine erste und eine zweite Anlagefläche, die bei einem Betrieb des Streckwerks an der Streckwerkswalze anliegen können. An jeder der Anlageflächen ist ein Verdichtungsbereich angeordnet, um einen längs durch den Verdichtungsbereich geführten Faserverband verdichten zu können. Die erste und die zweite Anlagefläche sind quer zu den Verdichtungsbereichen voneinander beabstandet und jeweils zwischen der Druckwalze und der Abzugswalze der beiden Walzenzwillinge angeordnet. Die Verdichtereinheit ist quer zu den beiden Verdichtungsbereichen beweglich am Grundkörper des Druckwalzenaggregats angeordnet.A pressure roller assembly according to the invention for two side-by-side drafting units of a textile machine has a compression unit, a base body and two twin rollers, which consist of two pressure rollers and two take-off rollers and which are received in the base body. The twin rollers can be placed on a common drafting roller. The printing roller unit has at least one means for fastening the compressor unit to the base body of the printing roller unit. The compression unit comprises a first and a second contact surface, which can bear against the drafting system roller when the drafting system is in operation. A compression area is arranged on each of the contact surfaces in order to be able to compress a fiber structure guided longitudinally through the compression area. The first and the second contact surface are transverse to the Compression areas spaced from each other and each arranged between the pressure roller and the take-off roller of the two roller twins. The compression unit is movably arranged transversely to the two compression areas on the base body of the pressure roller assembly.

Erfindungsgemäß ist die Verdichtereinheit wie zuvor beschrieben ausgebildet. Die Verdichtereinheit weist dazu eine dritte Anlagefläche zur Abstützung der Verdichtereinheit bei einem Betrieb des Streckwerks an der Streckwerkswalze auf. Die dritte Anlagefläche ist hierfür zwischen der ersten und der zweiten Anlagefläche und längs zu den Verdichtungsbereichen versetzt angeordnet. Durch diese Anordnung der dritten Anlagefläche wird Platz geschaffen, um die Verdichtereinheit um die Streckwerkswalze gedreht in verschiedenen Positionen, welche sehr nahe an den übrigen Streckwerkswalzen sein können, anzuordnen. Insbesondere wenn sich die Position sehr nahe an den übrigen Streckwerkswalzen befindet, ergibt sich hieraus durch die fixe Anordnung des weiteren Fadenverlaufs in der Ringspinnmaschine, dass eine nur geringe Fadenumschlingung der Ausgangswalze vorhanden ist. Hierdurch wird insbesondere ein stabileres Spinnen mit nur wenigen Fadenbrüchen ermöglicht.According to the invention, the compressor unit is designed as described above. For this purpose, the compressor unit has a third contact surface for supporting the compressor unit when the drafting system is in operation on the drafting system roller. For this purpose, the third contact surface is arranged between the first and the second contact surface and offset along the length of the compression areas. This arrangement of the third contact surface creates space to arrange the compressor unit rotated around the drafting device roller in different positions, which can be very close to the other drafting device rollers. Particularly when the position is very close to the other drafting rollers, the fixed arrangement of the further thread course in the ring spinning machine results in only a slight thread looping around the output roller. In particular, this enables more stable spinning with only a few thread breaks.

Ein erfindungsgemäßes Streckwerk ist mit einer Streckwerkswalze am Ausgang des Streckwerks sowie mit einem Druckwalzenaggregat für zwei nebeneinander angeordnete Streckwerke einer Textilmaschine, insbesondere einer Ringspinnmaschine, ausgestattet. Das Druckwalzenaggregat umfasst einen Grundkörper und zwei Walzenzwillinge, die aus zwei Druckwalzen und zwei Abzugswalzen bestehen und die in dem Grundkörper aufgenommen sind. Die Walzenzwillinge sind auf der Streckwerkswalze aufsetzbar. Eine Verdichtereinheit weist eine erste und eine zweite Anlagefläche auf, die bei einem Betrieb des Streckwerks an der Streckwerkswalze anliegen. An jeder der Anlageflächen ist ein Verdichtungsbereich angeordnet, um einen längs durch den Verdichtungsbereich geführten Faserverband verdichten zu können. Die erste und die zweite Anlagefläche sind quer zu den Verdichtungsbereichen voneinander beabstandet und sind jeweils zwischen der Druckwalze und der Abzugswalze angeordnet. Das Streckwerk weist eine Changiereinrichtung auf. Die Verdichtereinheit umfasst ein Kopplungselement für eine Verbindung der Verdichtereinheit mit der Changiereinrichtung und zum Changieren der Verdichtereinheit quer zu den beiden Verdichtungsbereichen.A drafting device according to the invention is equipped with a drafting device roller at the outlet of the drafting device as well as with a pressure roller unit for two adjacent drafting devices of a textile machine, in particular a ring spinning machine. The printing roller unit comprises a base body and two twin rollers, which consist of two printing rollers and two take-off rollers and which are received in the base body. The twin rollers can be placed on the drafting roller. A compression unit has a first and a second contact surface which, when the drafting system is in operation, bear against the drafting system roller. A compression area is arranged on each of the contact surfaces in order to be able to compress a fiber structure guided longitudinally through the compression area. The first and the second contact surface are transverse to the compression areas spaced from each other and are each arranged between the pressure roller and the take-off roller. The drafting system has a traversing device. The compressor unit comprises a coupling element for connecting the compressor unit to the traversing device and for traversing the compressor unit transversely to the two compression areas.

Erfindungsgemäß ist die Verdichtereinheit wie zuvor beschrieben ausgebildet. Sie weist eine dritte Anlagefläche zur Abstützung der Verdichtereinheit bei einem Betrieb des Streckwerks an der Streckwerkswalze auf. Die dritte Anlagefläche ist zwischen der ersten und der zweiten Anlagefläche und längs zu den Verdichtungsbereichen versetzt angeordnet. Eine optimale Positionierung der Verdichtereinheit in dem Streckwerk ist hierdurch möglich und dennoch kann die Verdichtereinheit sehr stabil auf der Streckwerkswalze gelagert werden, auch wenn sie changiert wird.According to the invention, the compressor unit is designed as described above. It has a third contact surface for supporting the compressor unit when the drafting system is in operation on the drafting system roller. The third contact surface is arranged between the first and the second contact surface and offset along the length of the compression areas. An optimal positioning of the compression unit in the drafting system is possible as a result and nevertheless the compression unit can be stored very stably on the drafting system roller, even if it is traversed.

Bildet in einer vorteilhaften Ausführung der Erfindung die dritte Anlagefläche das Kopplungselement für die Changiereinrichtung, so ist eine stabile, kippfreie Changierung der Verdichtereinheit auf der Streckwerkswalze möglich. Außerdem ist das Aus- und Einfädeln einem Öffnen und Schließen des Streckwerks schnell und einfach durchzuführen.If, in an advantageous embodiment of the invention, the third contact surface forms the coupling element for the traversing device, then stable, tilt-free traversing of the compressor unit on the drafting roller is possible. In addition, threading in and out, opening and closing the drafting system, can be carried out quickly and easily.

Weist die dritte Anlagefläche vorteilhafterweise Flanken auf zur Kontaktierung mit der Changiereinrichtung, so hilft dies ebenfalls für eine präzise Changierung der Verdichtereinheit, da die Flanken eine sehr gute Krafteinleitung in die Verdichtereinheit ermöglichen.If the third contact surface advantageously has flanks for contacting the traversing device, this also helps for precise traversing of the compressor unit, since the flanks enable very good force introduction into the compressor unit.

Besonders vorteilhaft ist es, wenn die Changiereinrichtung eine Changierzunge aufweist, welche die dritte Anlagefläche als Gabel oder Öse umgreift. Insbesondere beim Öffnen und Schließen des Streckwerks ist das Koppeln zwischen Verdichtereinheit und der Changierzunge der Changiereinrichtung besonders schnell und zuverlässig möglich. Durch die Ausbildung der Changierzunge als Gabel oder Öse ist damit gleichzeitig ein zuverlässiges Koppeln der Verdichtereinheit mit der Changiereinrichtung gewährleistet.It is particularly advantageous if the traversing device has a traversing tongue which engages around the third contact surface as a fork or eye. The coupling between the compressor unit and the traversing tongue of the traversing device is particularly important when opening and closing the drafting system possible particularly quickly and reliably. By designing the traversing tongue as a fork or eye, a reliable coupling of the compressor unit with the traversing device is ensured at the same time.

In einer besonders vorteilhaften Ausführung weist die Gabel oder Öse Wangen auf, welche mit den Flanken der dritten Anlagefläche zusammenwirken. Damit kann ein flächiger Kontakt zwischen der Changierzunge und der Verdichtereinheit hergestellt werden, welcher eine zuverlässige Changierung sicherstellt.In a particularly advantageous embodiment, the fork or eye has cheeks which interact with the flanks of the third contact surface. In this way, a flat contact can be established between the traversing tongue and the compressor unit, which ensures reliable traversing.

Sind in einer bevorzugten Ausführung der Erfindung die Flanken und/oder die Wangen abgeschrägt ausgebildet, so ist das Einfädeln der dritten Anlagefläche in die Changiereinrichtung beim Aufsetzen des Druckwalzenaggregats auf die Streckwerkswalze besonders einfach möglich. Insbesondere, wenn während des offenen Streckwerks die Changiereinrichtung bzw. die Changierzunge in ihrer Position verändert wird, kann durch die abgeschrägten Flanken bzw. Wangen dennoch ein sicheres Einfädeln stattfinden.If, in a preferred embodiment of the invention, the flanks and / or the cheeks are bevelled, the threading of the third contact surface into the traversing device is particularly easy when the pressure roller assembly is placed on the drafting roller. In particular, if the position of the traversing device or the traversing tongue is changed while the drafting system is open, the beveled flanks or cheeks can still be safely threaded.

Weist die Changierzunge vorzugsweise eine Auflagefläche zum Aufliegen auf der Streckwerkswalze auf, so ist die Lage der Changierzunge in horizontaler Richtung durch die Streckwerkswalze bestimmt. Bei einem Verschieben der Changierzunge in axialer Richtung der Streckwerkswalze wird die Changierzunge somit durch die Streckwerkswalze geführt. Bei einem Koppeln der Verdichtereinheit mit der Changierzunge kann hierdurch die dritte Auflagefläche bzw. das Element der Verdichtereinheit, welches die dritte Auflagefläche umfasst, in die entsprechende Öffnung der Changierzunge eingeführt werden, ohne dass die Changierzunge in vertikaler Richtung ausweichen kann.If the traversing tongue preferably has a support surface for resting on the drafting device roller, the position of the traversing tongue in the horizontal direction is determined by the drafting device roller. When the traversing tongue is displaced in the axial direction of the drafting device roller, the traversing tongue is thus guided through the drafting device roller. When the compressor unit is coupled to the traversing tongue, this allows the third support surface or the element of the compressor unit which comprises the third support surface to be inserted into the corresponding opening of the traversing tongue without the traversing tongue being able to deviate in the vertical direction.

Besonders vorteilhaft ist es, wenn die Druckwalze einen negativen Vorhang zur Streckwerkswalze bildet. Dies bedeutet, dass bei einer Seitenansicht des Streckwerks der Winkel zwischen einer Streckwerkslinie und einer Linie, welche durch die Mittelpunkte der Streckwerkswalze und der Druckwalze verläuft, weniger als 90° beträgt. Damit wird eine besonders gute Führung des Faserverbandes beim Eintritt in eine Klemmstelle zwischen der Druckwalze und der Streckwerkswalze erreicht.It when the pressure roller forms a negative curtain on the drafting unit roller is particularly advantageous. This means that, in the case of a side view of the drafting system, the angle between a drafting system line and a line which runs through the center points of the drafting system roller and the pressure roller, is less than 90 °. This achieves particularly good guidance of the fiber structure when it enters a nipping point between the pressure roller and the drafting device roller.

Ganz besonders vorteilhaft ist es, wenn die Abzugswalze in einem Winkel von weniger als 90°, vorzugsweise weniger als 30° von einem aus dem Streckwerk austretenden Faden umschlungen ist. Hierdurch wird die Spinnstabilität deutlich erhöht, da mit weniger Fadenbrüchen zu rechnen ist.It is particularly advantageous if the take-off roller is wrapped around the draw-off roller at an angle of less than 90 °, preferably less than 30 °, by a thread emerging from the drafting device. This significantly increases the spinning stability, since fewer thread breaks are to be expected.

Weitere Vorteile der Erfindung sind in den nachfolgenden Ausführungsbeispielen beschrieben. Es zeigt:

Figur 1
einen Längsschnitt durch ein erfindungsgemäßes, geschlossenes Streckwerk,
Figur 2
einen Längsschnitt durch das Streckwerk aus Figur 1 in geöffneter Stellung,
Figur 3
eine Ansicht von unten auf eine erfindungsgemäße Verdichtereinheit,
Figur 4
eine Draufsicht auf Unterwalzen des erfindungsgemäßen Streckwerks und
Figur 5
eine geschnittene Vorderansicht auf das erfindungsgemäße Streckwerk.
Further advantages of the invention are described in the following exemplary embodiments. It shows:
Figure 1
a longitudinal section through a closed drafting system according to the invention,
Figure 2
a longitudinal section through the drafting system Figure 1 in the open position,
Figure 3
a view from below of a compressor unit according to the invention,
Figure 4
a plan view of lower rollers of the drafting system according to the invention and
Figure 5
a sectional front view of the drafting device according to the invention.

Bei der nachfolgenden Beschreibung der dargestellten alternativen Ausführungsbeispiele werden für Merkmale, die in ihrer Ausgestaltung und/oder Wirkweise identisch und/oder zumindest vergleichbar sind, gleiche Bezugszeichen verwendet. Sofern diese nicht nochmals detailliert erläutert werden, entspricht deren Ausgestaltung und/oder Wirkweise der Ausgestaltung und Wirkweise der vorstehend bereits beschriebenen Merkmale.In the following description of the alternative exemplary embodiments shown, the same reference symbols are used for features which are identical and / or at least comparable in their design and / or mode of operation. Unless these are explained in detail again, their design and / or mode of action corresponds to the design and mode of action of the features already described above.

Figur 1 zeigt einen Längsschnitt durch ein erfindungsgemäßes, geschlossenes Streckwerk 1. Das Streckwerk 1 weist ein Eingangswalzenpaar 2, ein Streckwerksriemchenpaar 3 sowie Ausgangswalzen 4 auf. Bei den Ausgangswalzen 4 sind auf einer unteren Streckwerkswalze 5 eine Druckwalze 6 und eine Abzugswalze 7 angeordnet. Bei dem geschlossenen Streckwerk 1 liegt eine oben dargestellten Walze 2.2 des Eingangswalzenpaars 2, ein oberes Riemchen 3.2 sowie die Druckwalze 6 und die Abzugswalze 7 auf einer unteren Walze 2.1, einem Riemchen 3.1 sowie der Streckwerkswalze 5 auf. Figure 1 shows a longitudinal section through a closed drafting device 1 according to the invention. The drafting device 1 has a pair of input rollers 2, a pair of drafting aprons 3 and output rollers 4. In the case of the output rollers 4, a pressure roller 6 and a take-off roller 7 are arranged on a lower drafting device roller 5. In the closed drafting system 1, a roller 2.2 of the input roller pair 2 shown above, an upper apron 3.2 and the pressure roller 6 and the take-off roller 7 rest on a lower roller 2.1, an apron 3.1 and the drafting roller 5.

Die Druckwalze 6 und die Abzugswalze 7 sind in einem Druckwalzenaggregat 8 angeordnet. Das Druckwalzenaggregat 8 umfasst einen Grundkörper 9 sowie eine Feder 10, welche auf eine Verdichtereinheit 11 wirkt. Oberwalze 2.2, oberes Riemchen 3.2 sowie das Druckwalzenaggregat 8 mit der Druckwalze 6 und der Abzugswalze 7 sind in einem nicht dargestellten Druckarm des Streckwerks 1 befestigt. Die Druckwalze 6 und die Abzugswalze 7 sind jeweils als Walzenzwillinge ausgeführt, d. h., dass zwei benachbarte Streckwerke 1 über einen Druckarm bedient werden können und dass jeweils zwei der Walzen 6, 7 über eine gemeinsame Achse miteinander verbunden sind.The printing roller 6 and the take-off roller 7 are arranged in a printing roller assembly 8. The pressure roller assembly 8 comprises a base body 9 and a spring 10 which acts on a compressor unit 11. Upper roller 2.2, upper apron 3.2 and the pressure roller assembly 8 with the pressure roller 6 and the take-off roller 7 are fastened in a pressure arm, not shown, of the drafting system 1. The pressure roller 6 and the take-off roller 7 are each designed as roller twins, i.e. This means that two adjacent drafting units 1 can be operated via a pressure arm and that two of the rollers 6, 7 are connected to one another via a common axis.

Die in dem Druckwalzenaggregat 8 angeordnete Verdichtereinheit 11 weist eine erste Anlagefläche 12, eine in dieser Darstellung nicht sichtbare zweite Anlagefläche 13 sowie eine dritte Anlagefläche 14 auf. Die erste und die zweite Anlagefläche 12,13 befinden sich jeweils zwischen der Druckwalze 6 und der Abzugswalze 7. Die dritte Anlagefläche 14 ist zwischen den axial beabstandeten Druckwalzen 6 des Walzenzwillings angeordnet. Die erste, die zweite und die dritte Anlagefläche 12, 13, 14 stützen sich auf der Streckwerkswalze 5 ab. Vorzugsweise haben sie eine Wölbung, welche im Wesentlichen mit der Zylinderform der Streckwerkwalze 5 korrespondiert. Mit der Feder 10 wird die Verdichtereinheit 11 mit ihren Anlageflächen 12, 13 und 14 auf die Streckwerkswalze 5 gedrückt. Die Feder 10 ist hierfür mit einem Aufnahmeelement 23 der Verdichtereinheit 11 drehbar verbunden.The compressor unit 11 arranged in the pressure roller assembly 8 has a first contact surface 12, a second contact surface 13 (not visible in this illustration) and a third contact surface 14. The first and second contact surfaces 12, 13 are each located between the pressure roller 6 and the take-off roller 7. The third contact surface 14 is arranged between the axially spaced pressure rollers 6 of the roller twin. The first, second and third contact surfaces 12, 13, 14 are supported on the drafting device roller 5. They preferably have a curvature which essentially corresponds to the cylindrical shape of the drafting device roller 5. With the spring 10, the compressor unit 11 with its contact surfaces 12, 13 and 14 pressed onto the drafting device roller 5. For this purpose, the spring 10 is rotatably connected to a receiving element 23 of the compressor unit 11.

Die erste, zweite und dritte Anlagefläche 12,13 und 14 sind an einer Halterung 24 der Verdichtereinheit 11 angeordnet. Während die erste und die zweite Anlagefläche 12,13 in axialer Richtung der Druckwalze 6 bzw. der Abzugswalze 7 voneinander beabstandet sind, ist die dritte Anlagefläche 14 in axialer Richtung im Wesentlichen mittig zwischen den beiden ersten und zweiten Anlageflächen 12,13 angeordnet und befindet sich in Umfangsrichtung der Streckwerkswalze 5 von diesen beabstandet. Hierdurch ist die dritte Anlagefläche 14 in der Lage eine positionsgenaue Abstützung der ersten und zweiten Anlagefläche 12,13 zu bewirken. Die erste und zweite Anlagefläche 12,13 ist somit durch die dritte Anlagefläche 14 sehr stabil auf der Streckwerkswalze 5 angeordnet. Damit können sie sehr exakt einander zugeordnet werden. Die positionsgenaue Anordnung der ersten und zweiten Anlagefläche 12,13 durch die dritte Anlagefläche 14 gewährleistet, dass ein Faserverband 17 in der Verdichtereinheit 11 zuverlässig geführt werden kann, ohne dass Fasern des Faserverbandes 17 aus der Verdichtereinheit 11 seitlich entweichen können.The first, second and third contact surfaces 12, 13 and 14 are arranged on a holder 24 of the compressor unit 11. While the first and second contact surfaces 12, 13 are spaced apart from one another in the axial direction of the pressure roller 6 and the take-off roller 7, the third contact surface 14 is arranged and located essentially centrally between the two first and second contact surfaces 12, 13 in the axial direction spaced from these in the circumferential direction of the drafting roller 5. As a result, the third contact surface 14 is able to effect a positionally accurate support of the first and second contact surface 12, 13. The first and second contact surface 12, 13 are thus arranged very stably on the drafting device roller 5 due to the third contact surface 14. This means that they can be assigned to one another very precisely. The precisely positioned arrangement of the first and second contact surface 12, 13 by the third contact surface 14 ensures that a fiber structure 17 can be reliably guided in the compressor unit 11 without fibers of the fiber structure 17 being able to escape laterally from the compressor unit 11.

Ein besonderer Vorteil dieser Abstützung der Anlageflächen 12,13 durch die dritte Anlagefläche 14 ist es, dass das Druckwalzenaggregat 8 derart um die Streckwerkswalze 5 gedreht angeordnet sein kann, dass ein negativer Vorhangwinkel 20 der Druckwalze 6 in Bezug auf die Streckwerkswalze 5 eingestellt werden kann. Der negative Vorhangwinkel 20 bedeutet, dass in Bezug auf die Laufrichtung des Faserverbandes 17 das Zentrum der Druckwalze 12 vor dem Zentrum der Druckwalze 5 angeordnet ist. Hierdurch wird außerdem bewirkt, dass ein Umschlingungswinkel 21 des Faserverbandes 17 an der Abzugswalze 7 klein, d.h. weniger als 90°, vorzugsweise weniger als 30°, ist. Durch diesen kleinen Umschlingungswinkel 21 wird ein sehr stabiles Spinnen bewirkt, da hierdurch Fadenbrüche deutlich reduziert werden können. Negative Vorhangwinkel 20 bzw. das derart gedrehte Druckwalzenaggregat 8 sind möglich, weil die Abstützung der ersten und zweiten Anlagefläche 12,13 nicht zwischen der Druckwalze 6 und dem Riemchen 3.2 erfolgt, sondern seitlich hierzu versetzt zwischen den Druckwalzen 6 zweier benachbarter Streckwerke 1.A particular advantage of this support of the contact surfaces 12, 13 by the third contact surface 14 is that the pressure roller unit 8 can be rotated around the drafting unit roller 5 in such a way that a negative curtain angle 20 of the printing roller 6 with respect to the drafting unit roller 5 can be set. The negative curtain angle 20 means that the center of the pressure roller 12 is arranged in front of the center of the pressure roller 5 in relation to the running direction of the fiber structure 17. This also has the effect that a wrap angle 21 of the fiber structure 17 on the take-off roller 7 is small, ie less than 90 °, preferably less than 30 °. A very stable spinning is brought about by this small angle of wrap 21, since thread breaks can be significantly reduced as a result. Negative curtain angles 20 or the printing roller assembly 8 rotated in this way are possible because the first and second contact surfaces 12, 13 are not supported between the pressure roller 6 and the apron 3.2, but laterally offset between the pressure rollers 6 of two adjacent drafting units 1.

Die Verdichtereinheit 11 ist mit einer Changierzunge 15 der Changiereinrichtung gekoppelt. Die Changierzunge 15 ist außerdem mit einem Verdichter 16 verbunden, welcher den Faserverband 17 in das Streckwerk 1 leitet. Die Kopplung der Changierzunge 15 mit der Verdichtereinheit 11 erfolgt mit einer Gabel 18, welche die Verdichtereinheit 11 im Bereich der dritten Anlagefläche 14 umgreift. Die dritte Anlagefläche 14 bildet somit ein Kopplungselement für die Changiereinrichtung. Die Koppelung ist derart ausgeführt, dass die Verdichtereinheit 11 bei einem Öffnen des Streckwerks 1 aus der Changierzunge 15 bzw. der Gabel 18 nach oben herausgleiten kann. Wird das Streckwerk 1 wieder geschlossen, so wird die Verdichtereinheit 11 bzw. die dritte Anlagefläche 14 wieder in die Gabel 18 der Changierzunge 15 eingeführt.The compressor unit 11 is coupled to a traversing tongue 15 of the traversing device. The traversing tongue 15 is also connected to a compressor 16 which guides the fiber structure 17 into the drafting system 1. The coupling of the traversing tongue 15 to the compressor unit 11 takes place with a fork 18 which engages around the compressor unit 11 in the area of the third contact surface 14. The third contact surface 14 thus forms a coupling element for the traversing device. The coupling is designed in such a way that the compressor unit 11 can slide upwards out of the traversing tongue 15 or the fork 18 when the drafting device 1 is opened. If the drafting system 1 is closed again, the compressor unit 11 or the third contact surface 14 is reinserted into the fork 18 of the traversing tongue 15.

Die Changierzunge 15 ist durch die Kopplung in der Lage, wenn diese in axialer Richtung der Walzen hin und her bewegt wird, auch die Verdichtereinheit 11 in gleicher Weise hin und her zu bewegen. Durch diese Changierung der Verdichtereinheit 11 wird bewirkt, dass der Faserverband 17 an unterschiedlichen axialen Stellen der Druckwalze 6 bzw. Abzugswalze 7 auf der Streckwerkswalze 5 geklemmt wird. Der Verschleiß der Druckwalze 6 bzw. Abzugswalze 7 wird hierdurch verringert, da die Kontaktstellen ständig verändert werden können.As a result of the coupling, the traversing tongue 15 is able, when it is moved back and forth in the axial direction of the rollers, to move the compressor unit 11 back and forth in the same way. This traversing of the compressor unit 11 has the effect that the fiber structure 17 is clamped at different axial points of the pressure roller 6 or take-off roller 7 on the drafting unit roller 5. The wear on the pressure roller 6 or take-off roller 7 is reduced as a result, since the contact points can be constantly changed.

Um die Changierzunge 15 in radialer Richtung der Streckwerkswalze positionieren zu können, weist die Changierzunge 15 bzw. die Gabel 18 eine Anlagefläche 19 auf, mit welcher diese auf der Streckwerkswalze 5 aufliegt. Diese Auflagefläche 19 gleitet somit bei einer axialen Changierung der Changierzunge 15 auf der Streckwerkswalze 5 in axialer Richtung hin und her.In order to be able to position the traversing tongue 15 in the radial direction of the drafting device roller, the traversing tongue 15 or the fork 18 has a contact surface 19 with which it rests on the drafting device roller 5. This bearing surface 19 thus slides back and forth in the axial direction when the traversing tongue 15 is traversed axially on the drafting device roller 5.

Figur 2 zeigt einen Längsschnitt durch das Streckwerk 1 aus Figur 1 in geöffneter Stellung. Hierbei ist die obere Eingangswalze 2.2, das obere Riemchen 3.2 sowie das Druckwalzenaggregat 8 mit der Druckwalze 6 und der Abzugswalze 7 von der unteren Walze 2.2, dem Riemchen 3.1 sowie der Streckwerkswalze 5 abgehoben. Aus dieser Darstellung wird insbesondere die Kopplung zwischen der Verdichtereinheit 11 und der Changierzunge 15 ersichtlich. Die Verdichtereinheit 11 ist zusammen mit dem Druckwalzenaggregat 8 aus der Kopplung mit der Changierzunge 15 bzw. deren Gabel 18 entfernt. Die dritte Anlagefläche 14 ist damit aus der Gabel 18 entnommen. Die Changierzunge 15 und die Gabel 18 bleiben mittels der Auflagefläche 19 weiterhin auf der Streckwerkswalze 5 liegen. Wenn das Streckwerk 1 wieder geschlossen wird, wird die Verdichtereinheit 11 zusammen mit den anderen Bauelementen wieder abgesenkt, wodurch die dritte Anlagefläche 14 wieder in die Gabel 18 gelangt, auf der Druckwalze 5 aufliegt und seitlich durch die Gabel 18 geführt werden kann, so wie in Figur 1 dargestellt. Figure 2 shows a longitudinal section through the drafting system 1 from Figure 1 in the open position. Here, the upper input roller 2.2, the upper apron 3.2 and the pressure roller assembly 8 with the pressure roller 6 and the take-off roller 7 are lifted from the lower roller 2.2, the apron 3.1 and the drafting unit roller 5. From this illustration, the coupling between the compressor unit 11 and the traversing tongue 15 can be seen in particular. The compressor unit 11, together with the pressure roller assembly 8, is removed from the coupling with the traversing tongue 15 or its fork 18. The third contact surface 14 is thus removed from the fork 18. The traversing tongue 15 and the fork 18 remain on the drafting roller 5 by means of the support surface 19. When the drafting system 1 is closed again, the compressor unit 11 is lowered again together with the other components, whereby the third contact surface 14 comes back into the fork 18, rests on the pressure roller 5 and can be guided laterally through the fork 18, as in FIG Figure 1 shown.

In Figur 3 ist eine Ansicht von unten auf eine erfindungsgemäße Verdichtereinheit 11 gezeigt. Zentrales Bauteil der Verdichtereinheit 11 ist die Halterung 24. An den jeweiligen Enden der Halterung 24 ist die erste, zweite und dritte Anlagefläche 12, 13 und 14 angeordnet. In der erste und zweite Anlagefläche 12, 13 ist jeweils ein Verdichtungsbereich 22 vorhanden. Der Faserverband 17 gelangt in diesen Verdichtungsbereich 22 und wird darin komprimiert. Dieser Verdichtungsbereich 22 bildet zusammen mit der Streckwerkswalze 5, auf welcher die erste und zweite Anlagefläche 12, 13 aufliegt, einen weitgehend geschlossenen Kanal, welcher verhindert, dass einzelne Phasen des Faserverbandes 17 aus dem Kanal des Verdichtungsbereichs 22 seitlich entweichen können.In Figure 3 a view from below of a compressor unit 11 according to the invention is shown. The central component of the compressor unit 11 is the holder 24. The first, second and third contact surfaces 12, 13 and 14 are arranged at the respective ends of the holder 24. A compression area 22 is present in each of the first and second contact surfaces 12, 13. The fiber structure 17 arrives in this compression area 22 and is compressed therein. This compression area 22, together with the drafting roller 5, on which the first and second contact surfaces 12, 13 rests, forms a largely closed channel which prevents individual phases of the fiber structure 17 from escaping laterally from the channel of the compression area 22.

Über das Aufnahmeelement 23, dass sich bei diesem Ausführungsbeispiel an der den Anlageflächen 12,13 und 14 gegenüberliegenden Seite der Halterung 24 befindet, ist die Verdichtereinheit 11 mit dem Druckwalzenaggregat 8 mittel der Feder 10 verbunden (siehe Figur 1 und 2).Via the receiving element 23, which in this exemplary embodiment is located on the side of the holder opposite the contact surfaces 12, 13 and 14 24 is located, the compressor unit 11 is connected to the pressure roller assembly 8 by means of the spring 10 (see Figure 1 and 2 ).

Die Kopplung zwischen der Changierzunge 15 und der Verdichtereinheit 11 erfolgt über die Halterung 24 bzw. die Formgebung der Halterung 24 im Bereich der dritten Auflagefläche 14. Die Gabel 18 der Changierzunge 15 umgreift dabei die Halterung 24 bzw. die dritte Anlagefläche 14 seitlich. Bei einer Bewegung der Changierzunge 15 quer zum Verlauf des Faserverbandes 17 wird dabei die Verdichtereinheit 11 zusammen mit der Changierzunge 15 seitlich hin und her verschoben. Die Kontaktstellen zwischen der dritten Anlagefläche 14 und der Gabel 18 der Changierzunge 15 sind Wangen 25 der Zunge 15 und Flanken 33 der dritten Anlagefläche 14 bzw. der Halterung 24. Vorteilhaft ist es, wenn zwischen den Wangen 25 und den Flanken 33 ein geringes Spiel vorhanden ist, um das Einfädeln beim Koppeln der Verdichtereinheit 11 mit der Changierzunge 15 zu erleichtern. Weiterhin ist bei diesem Ausführungsbeispiel vorgesehen, dass die Wangen 25 für das einfachere Einfädeln abgeschrägt ausgebildet sind. Damit ist es auch bei einem kleinen seitlichen Versatz zwischen Changierzunge 15 und Verdichtereinheit 11 möglich, dass eine Kopplung beim Schließen des Streckwerks 1 stattfindet.The coupling between the traversing tongue 15 and the compressor unit 11 takes place via the holder 24 or the shape of the holder 24 in the area of the third bearing surface 14. The fork 18 of the traversing tongue 15 encompasses the holder 24 or the third bearing surface 14 laterally. When the traversing tongue 15 moves transversely to the course of the fiber structure 17, the compressor unit 11 is shifted to and fro laterally together with the traversing tongue 15. The contact points between the third contact surface 14 and the fork 18 of the traversing tongue 15 are cheeks 25 of the tongue 15 and flanks 33 of the third contact surface 14 or the holder 24. It is advantageous if there is little play between the cheeks 25 and the flanks 33 is to facilitate threading when coupling the compressor unit 11 with the traversing tongue 15. In addition, it is provided in this exemplary embodiment that the cheeks 25 are designed to be beveled for easier threading. Thus, even with a small lateral offset between the traversing tongue 15 and the compressor unit 11, it is possible for a coupling to take place when the drafting system 1 is closed.

Figur 4 zeigt eine Draufsicht auf Unterwalzen des erfindungsgemäßen Streckwerks 1 sowie die Changiereinrichtung, welche die Changierzunge 15 und eine Changierstange 28 umfasst. Die Darstellung zeigt darüber hinaus zwei parallel zueinander angeordnete Streckwerke 1. Zwischen den beiden Streckwerken 1 ist die Changierzunge 15 angeordnet. Die Changierzunge 15 ist außerdem an der Changierstange 28 befestigt und ist gemäß Doppelpfeilrichtung C hin und her changierbar. Figure 4 shows a plan view of lower rollers of the drafting system 1 according to the invention and the traversing device which comprises the traversing tongue 15 and a traversing rod 28. The illustration also shows two drafting devices 1 arranged parallel to one another. The traversing tongue 15 is arranged between the two drafting devices 1. The traversing tongue 15 is also attached to the traversing rod 28 and can be traversed back and forth in the direction of the double arrow C.

Im Gegensatz zu dem vorherigen Ausführungsbeispiel weist die Changierzunge 15 nunmehr eine Öse 29 anstelle einer Gabel 18 auf. Die Auflagefläche 19 der Changierzunge 15 kann durch die Öse 29 breiter und stabiler ausgeführt werden.In contrast to the previous exemplary embodiment, the traversing tongue 15 now has an eyelet 29 instead of a fork 18. The contact surface 19 of the traversing tongue 15 can be made wider and more stable through the eyelet 29.

Die Darstellung dieser Figur 4 zeigt darüber hinaus den Aufbau der Streckwerkswalze 5. Diese Streckwerkswalze 5 weist Zylinderabschnitte auf, welche geriffelte Bereiche 26 sowie glatte Bereiche 27 haben. Die erste und zweite Anlagefläche 12, 13 liegen dabei auf den geriffelten Bereichen 26 auf der Streckwerkswalze 5 auf. Die dritte Anlagefläche 14 hingegen befindet sich zwischen den beiden Streckwerken 1 in dem glatten Bereich bzw. Zylinderabschnitt 27 der Streckwerkswalze 5 und stützt sich dort ab.The representation of this Figure 4 also shows the structure of the drafting unit roller 5. This drafting unit roller 5 has cylinder sections which have corrugated areas 26 and smooth areas 27. The first and second contact surfaces 12, 13 lie on the corrugated areas 26 on the drafting device roller 5. The third contact surface 14, on the other hand, is located between the two drafting devices 1 in the smooth area or cylinder section 27 of the drafting device roller 5 and is supported there.

Im geriffelten Bereich 26 der Streckwerkswalze 5 ist mit einer gestrichelten Linie eine Drucklinie 30 für die Druckwalze 6 sowie eine Drucklinie 31 für die Abzugswalze 7 dargestellt. Es ist hieraus ersichtlich, dass die Drucklinie 30 für die Druckwalze 6 in Richtung zu den unteren Riemchen 3.1 in Bezug auf eine Mittellinie S der Streckwerkswalze 5 versetzt ist. Ein Vorhang V wird damit negativ. Dies ist möglich, da die Abstützung für die erste und zweite Anlagefläche 12,13 nicht zwischen dem Riemchen 3.1 und der Druckwalze 6 angeordnet ist, sondern seitlich dazu versetzt in dem glatten Bereich 27 der Streckwerkswalze 5. Hierdurch wandert auch die Drucklinie 31 der Abzugswalze 7 näher an die Mittellinie S heran und bewirkt damit, dass die Umschlingung der Abzugswalze 7 durch den Faserverband 17 nur sehr gering ist.In the corrugated area 26 of the drafting device roller 5, a dashed line shows a pressure line 30 for the pressure roller 6 and a pressure line 31 for the take-off roller 7. It can be seen from this that the pressure line 30 for the pressure roller 6 is offset in the direction of the lower aprons 3.1 with respect to a center line S of the drafting device roller 5. A curtain V thus becomes negative. This is possible because the support for the first and second contact surfaces 12, 13 is not arranged between the apron 3.1 and the pressure roller 6, but laterally offset thereto in the smooth area 27 of the drafting unit roller 5. This also causes the pressure line 31 of the take-off roller 7 to migrate closer to the center line S and thus has the effect that the wrapping around the take-off roller 7 by the fiber structure 17 is only very slight.

In Figur 5 ist eine geschnittene Vorderansicht auf das erfindungsgemäße Streckwerk 1 dargestellt. Der Schnitt erfolgt durch die erste, zweite und dritte Anlagefläche 12, 13 und 14. Bei der ersten und zweiten Anlagefläche 12, 13 ist dabei der Verdichtungsbereich 22 ersichtlich, welcher einen Kanal bildet, durch den der Faserverband 17 hindurch gefördert werden kann. Die beiden Anlageflächen 12 und 13 liegen dabei auf dem geriffelten Bereich 26 der Streckwerkswalze 5 auf. Zwischen den beiden ersten und zweiten Anlageflächen 12 und 13 ist die dritte Anlagefläche 14 zu sehen. Diese dritte Anlagefläche 14 liegt in dem glatten Bereich 27 der Streckwerkswalze 5 auf. Ebenfalls in diesem Bereich liegt die Auflagefläche 19 der Changierzunge 15 auf. In diesem Ausführungsbeispiel sind sowohl die Wangen 25 der Changierzunge 15 als auch die Flanken 33 der dritten Anlagefläche 14 abgeschrägt. Hierdurch ist ein Einfädeln der dritten Anlagefläche 14 in die Gabel 18 bzw. Öse 29 der Changierzunge 15 sehr einfach möglich, auch wenn ein gewisser Versatz zwischen der Changierzunge 15 und der dritten Anlagefläche 14 vorhanden sein sollte.In Figure 5 a sectional front view of the drafting device 1 according to the invention is shown. The cut is made through the first, second and third contact surfaces 12, 13 and 14. In the first and second contact surfaces 12, 13 the compression area 22 can be seen, which forms a channel through which the fiber structure 17 can be conveyed. The two contact surfaces 12 and 13 lie on the corrugated area 26 of the drafting device roller 5. The third contact surface 14 can be seen between the two first and second contact surfaces 12 and 13. This third contact surface 14 rests in the smooth area 27 of the drafting device roller 5. The support surface 19 of the traversing tongue 15 also rests in this area. In this embodiment, both the cheeks 25 of the traversing tongue 15 and the flanks 33 of the third contact surface 14 are beveled. This makes it very easy to thread the third contact surface 14 into the fork 18 or eyelet 29 of the traversing tongue 15, even if there should be a certain offset between the traversing tongue 15 and the third contact surface 14.

Der geriffelte Bereich 26 der Streckwerkswalze 5 weist einen etwas größeren Durchmesser auf als der glatte Bereich 27 der Streckwerkswalze 5. Um dennoch einen stabilen und durchgehenden Kontakt der erste und zweite Anlagefläche 12,13 mit der Druckwalze 6 zu erhalten, ist ein entsprechender Höhenversatz h zwischen der erste und zweite Anlagefläche 12,13 und der dritten Anlagefläche 14 vorhanden. Die dritte Anlagefläche 14 bzw. deren Halterung 24 weist somit eine Länge auf, die diesen Durchmesserunterschied der Streckwerkswalze 5 ausgleicht.The corrugated area 26 of the drafting roller 5 has a slightly larger diameter than the smooth area 27 of the drafting roller 5. In order to still maintain a stable and continuous contact of the first and second contact surfaces 12, 13 with the pressure roller 6, a corresponding height offset h is between the first and second contact surface 12, 13 and the third contact surface 14 are present. The third contact surface 14 or its holder 24 thus has a length which compensates for this difference in diameter of the drafting device roller 5.

Die vorliegende Erfindung ist nicht auf die dargestellten und beschriebenen Ausführungsbeispiele beschränkt. Abwandlungen im Rahmen der Patentansprüche sind ebenso möglich .The present invention is not limited to the illustrated and described exemplary embodiments. Modifications within the scope of the claims are also possible.

BezugszeichenlisteList of reference symbols

11
StreckwerkDrafting system
22
EingangswalzenpaarInput roller pair
2.12.1
untere Walzelower roller
2.22.2
OberwalzeTop roller
33
StreckwerksriemchenpaarDrafting belt pair
3.13.1
unteres Riemchenlower strap
3.23.2
oberes Riemchenupper strap
44th
AusgangswalzenExit rollers
55
StreckwerkswalzeDrafting roller
66th
DruckwalzePressure roller
77th
AbzugswalzeTake-off roller
88th
DruckwalzenaggregatPrint roller unit
99
GrundkörperBase body
1010
Federfeather
1111
VerdichtereinheitCompressor unit
1212th
erste Anlageflächefirst contact surface
1313th
zweite Anlageflächesecond contact surface
1414th
dritte Anlageflächethird contact surface
1515th
ChangierzungeTraversing tongue
1616
Verdichtercompressor
1717th
FaserverbandFiber bandage
1818th
Gabelfork
1919th
AuflageflächeSupport surface
2020th
negativer Vorhangwinkelnegative curtain angle
2121
UmschlingungswinkelWrap angle
2222nd
VerdichtungsbereichCompression area
2323
AufnahmeelementReceiving element
2424
Halterungbracket
2525th
Wangecheek
2626th
geriffelter Bereichcorrugated area
2727
glatter Bereichsmooth area
2828
ChangierstangeTraversing rod
2929
Öseeyelet
3030th
Drucklinie DruckwalzePrint line print roller
3131
Drucklinie AbzugswalzePrint line take-off roller
3232
Achseaxis
3333
FlankeFlank
CC.
ChangierbewegungTraversing movement
SS.
MittellinieCenter line
VV
Vorhangcurtain
hH
HöhenversatzHeight offset

Claims (15)

  1. A condensing unit for two drafting systems (1) of a textile machine disposed adjacent to each other
    - having a holder (24),
    - wherein a first and a second contact surface (12, 13) being disposed on the holder (24) for making contact with a drafting roller (5) when the drafting system (1) is operating
    - wherein a condensing region (22) being disposed at each of the contact surfaces (12, 13) for condensing a fiber strand (17) guided longitudinally through the condensing region (22),
    - wherein the first and the second contact surfaces (12, 13) being spaced apart from each other transverse to the condensing regions (22), and
    - having a coupling element for an traversing device for oscillating the condensing unit (11) transverse to the two condensing regions (22),
    characterized in that,
    - the condensing unit (11) comprises a third contact surface (14) for supporting the condensing unit (11) on the drafting roller (5) when the drafting system (1) is operating, and
    - wherein the third contact surface (14) is disposed between the first and the second contact surfaces (12, 13) and offset longitudinally from the condensing regions (22).
  2. The condensing unit according to the preceding claim, characterized in that, the third contact surface (14) forms the coupling element for the traversing device.
  3. The condensing unit according to any one or more of the preceding claims, characterized in that, the third contact surface (14) comprises flanks (33) for contacting the traversing device.
  4. The condensing unit according to any one or more of the preceding claims, characterized in that, the flanks (33) are beveled for threading into the traversing device.
  5. The condensing unit according to any one or more of the preceding claims, characterized in that, the third contact surface (14) is disposed on the holder (24).
  6. The condensing unit according to any one or more of the preceding claims, characterized in that, a receiving element (23) for receiving the condensing unit (11) in a pressure roller unit (8) of the drafting system (1) is disposed on the holder (24).
  7. The condensing unit according to any one or more of the preceding claims, characterized in that, the first and the second contact surfaces (12, 13) each comprise a curvature substantially corresponding to a grooved cylinder segment (26) of the drafting roller (5) designated for said surfaces, and the third contact surface (14) comprises a length protruding into said cylindrical segment (26) for being supported on a non-grooved cylinder segment (27) of the drafting roller (5).
  8. A pressure roller unit for two drafting systems (1) of a textile machine disposed adjacent to each other,
    - having a condensing unit (11),
    - having a base body (9), and
    - having two roller pairs made of two pressure rollers (6) and two take-off rollers (7) and received in the base body (9), the roller pairs being placeable on a common drafting roller (5),
    - wherein the pressure roller unit (8) comprising at least one means for attaching the condensing unit (11) to the base body (9) of the pressure roller unit (8), and
    - the condensing unit (11) comprising a first and a second contact surface (12, 13) for making contact with the drafting roller (5) when the drafting system (1) is operating, and
    - wherein a condensing region (22) being disposed at each of the two contact surfaces (12, 13) for condensing a fiber strand (17) guided longitudinally through the condensing region (22),
    - wherein the first and the second contact surfaces (12, 13) being spaced apart from each other transverse to the condensing regions (22) and each being disposed between the pressure roller (6) and the take-off roller (7) of the two roller pairs, and
    - wherein the condensing unit (11) being disposed transversely displaceably relative to the two condensing regions (22) on the base body (9) of the pressure roller unit (8),
    characterized in that,
    - the condensing unit (11) is implemented according to the preceding claims, wherein
    - said condensing unit comprises a third contact surface (14) for supporting the condensing unit (11) on the drafting roller (5) when the drafting system (1) is operating, and
    - the third contact surface (14) is disposed between the first and the second contact surfaces (12, 13) and offset longitudinally from the condensing regions (22).
  9. A drafting system having a drafting roller (5) at the outlet of the drafting system (1) and having a pressure roller unit (8) for two drafting systems (1) of a textile machine disposed adjacent to each other,
    - wherein the pressure roller unit (8) comprising a base body (9) and two roller pairs made of two pressure rollers (6) and two take-off rollers (7) and received in the base body (9), the roller pairs being placeable on the drafting roller (5),
    - wherein a condensing unit (11) comprising a first and a second contact surface (12, 13) for making contact with the drafting roller (5) when the drafting system (1) is operating, and
    - wherein a condensing region (22) being disposed at each of the two contact surfaces (12, 13) for condensing a fiber strand (17) guided longitudinally through the condensing region (22),
    - wherein the first and the second contact surfaces (12, 13) being spaced apart from each other transverse to the condensing regions (22) and each being disposed between the pressure roller (6) and the take-off roller (7), and
    - wherein the drafting system (1) comprising a traversing device, and
    - the condensing unit (11) comprising a coupling element for the traversing device for oscillating the condensing unit (11) transverse to the two condensing regions (22),
    characterized in that,
    - the condensing unit (11) is implemented according to the preceding claims 1 to 7, wherein
    - said condensing unit comprises a third contact surface (14) for supporting the condensing unit (11) on the drafting roller (5) when the drafting system (1) is operating, and
    - the third contact surface (14) is disposed between the first and the second contact surfaces (12, 13) and offset longitudinally from the condensing regions (22).
  10. The drafting system according to the preceding claim, characterized in that, the third contact surface (14) forms the coupling element for the traversing device.
  11. The drafting system according to any one or more of the preceding claims, characterized in that , the third contact surface (14) comprises flanks (33) for contacting the traversing device.
  12. The drafting system according to any one or more of the preceding claims, characterized in that , the traversing device comprises an traversing tongue (15) enclosing the third contact surface (14) as a fork (18) or eye (29) and/or a contact surface (19) for resting on the drafting roller (5).
  13. The drafting system according to any one or more of the preceding claims, characterized in that , the fork (18) or eye (29) comprises walls (25) interacting with the flanks (33) of the third contact surface (14) and wherein the flanks (33) and/or the walls (25) are preferably beveled for threading the third contact surface (14) into the traversing device when placing the pressure roller unit (8) on the drafting roller (5).
  14. The drafting system according to any one or more of the preceding claims, characterized in that , the pressure roller (6) forms a negative lead (V) to the drafting roller (5).
  15. The drafting system according to any one or more of the preceding claims, characterized in that , the take-off roller (7) is enlaced by a fiber strand (17) exiting the drafting system (1) at an angle (21) of less than 90°, preferably less than 30°.
EP19204341.2A 2018-10-25 2019-10-21 Condensing unit with three contact surfaces, pressuring roller unit and drawing unit Active EP3666942B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018126635.9A DE102018126635A1 (en) 2018-10-25 2018-10-25 Compressor unit, pressure roller unit and drafting system

Publications (2)

Publication Number Publication Date
EP3666942A1 EP3666942A1 (en) 2020-06-17
EP3666942B1 true EP3666942B1 (en) 2021-04-28

Family

ID=68296265

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19204341.2A Active EP3666942B1 (en) 2018-10-25 2019-10-21 Condensing unit with three contact surfaces, pressuring roller unit and drawing unit

Country Status (3)

Country Link
EP (1) EP3666942B1 (en)
CN (1) CN111101244B (en)
DE (1) DE102018126635A1 (en)

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DE102005016442A1 (en) * 2005-04-04 2006-10-05 Wilhelm Stahlecker Gmbh Conveyer belt has poly-tetrafluorethylene coating or fibers for textile machine fiber pneumatic compression zone
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DE102015112662A1 (en) 2015-07-31 2017-02-02 Maschinenfabrik Rieter Ag Compressor unit for a drafting system of a textile machine

Also Published As

Publication number Publication date
CN111101244B (en) 2022-11-25
DE102018126635A1 (en) 2020-04-30
CN111101244A (en) 2020-05-05
EP3666942A1 (en) 2020-06-17

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