CN111101244A

CN111101244A - Compressor unit, calender unit and drafting system

Info

Publication number: CN111101244A
Application number: CN201911004831.5A
Authority: CN
Inventors: G·斯塔莱克; G·沙夫勒; K·胡贝尔
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2018-10-25
Filing date: 2019-10-22
Publication date: 2020-05-05
Anticipated expiration: 2039-10-22
Also published as: CN111101244B; DE102018126635A1; EP3666942B1; EP3666942A1

Abstract

The invention relates to a compressor assembly for two juxtaposed drafting systems (1) of a textile machine, comprising a holding device (24), on which holding device (24) a first (12) and a second (13) contact surface that can be brought into contact with drafting rollers (5) during operation of the drafting system (1) are arranged. A compression region (22) is arranged on each of the contact surfaces (12, 13) in order to compress the fiber band (17) passing through the compression region (22) in the longitudinal direction, wherein the first contact surface (12) and the second contact surface (13) are spaced apart from each other transversely to the compression region (22) and are connected to a coupling element for a traversing device traversing the compressor unit (11) transversely to the two compression regions (22). According to the invention, the compressor unit (11) has a third contact surface (14) which supports the compressor unit (11) on the drafting rollers (5) during operation of the drafting system (1), wherein the third contact surface (14) is arranged between the first contact surface (12) and the second contact surface (13) and is offset in the longitudinal direction from the compression region (22). The invention also relates to a calender unit (8) and a drafting system (1) for two juxtaposed drafting systems (1) of a textile machine, wherein a compressor unit (11) is constructed according to the above description.

Description

Compressor unit, calender unit and drafting system

Technical Field

The invention relates to a compressor group for two juxtaposed drawing systems of a textile machine, comprising: a holding device, wherein a first and a second engagement surface are arranged on the holding device, which can be brought into abutment with the drawing rollers during operation of the drawing system, wherein a compression region is arranged on each engagement surface in order to be able to compress a fiber band passing longitudinally through the compression region, wherein the first and the second engagement surface are spaced apart from one another transversely to the compression region; and a coupling element for a traversing device which traverses the compressor unit transversely to the two compression zones. The invention also relates to a calender unit having such a compressor unit and to a drafting system having such a calender unit.

Background

EP 1953275B 1 discloses a drafting system for drafting a fiber band in a ring spinning machine. The drafting system comprises a mechanical device for compressing the fiber band drafted in the drafting system, which has at least one guide surface, which are arranged obliquely to the transport direction of the fiber band. The drafting system also includes a traversing device coupled to the compressor assembly having a guide surface. The service life of the drawing roller can be increased by means of the traversing device, since the fiber band is displaced on the drawing roller or the lateral surface of the drawing roller by means of the traversing device. This avoids cutting the fiber band at a point on the draft rollers. However, the disadvantage is that the traversing device is displaced relative to the compressor assembly when the drafting system is switched on. To reconnect the compressor assembly to the traverse device, a clearance is provided at the junction between the traverse device and the compressor assembly. This prevents accurate positioning and traversing of the compressor assembly.

EP 3124660 a1 discloses a transversible compressor unit for a drafting system of a textile machine, in particular a ring spinning machine. The compressor unit comprises at least one guide element with an engagement surface, which abuts the drafting rollers during operation of the drafting system. The fiber band is guided by means of the guide. The engaging surface is advantageously of curved and in particular concave design, wherein the engaging surface is adapted to the side surface of the drafting roller. The guide has a compression region for compressing the fiber band through the compression region. It can be displaced in the axial direction of the drafting rollers. The compressor unit is positioned on the drawing roller by means of two joint surfaces arranged one after the other along the course of the fiber band. Due to the two engagement surfaces, in particular the engagement surface arranged in front of the first top roller, the positioning of the compressor assembly relative to the drafting system is limited. The first top roller must be located at a greater distance from the drafting system, while the second top roller is extensively wrapped by the filaments.

Disclosure of Invention

In view of the above, it is an object of the present invention to provide a compressor unit, a calender unit and a drafting system, in particular for ring spinning machines, which enable a stable positioning of the compressor unit and a uniform and stable spinning.

The solution of the invention to achieve the above object consists in a compressor unit and a drawing system having the features of the independent claims.

The compressor assembly according to the invention for two juxtaposed drafting systems of a textile machine, in particular of a ring spinning machine, comprises a holding device on which a first and a second engagement surface are arranged, which can abut against the drafting rollers during operation of the drafting system. A compression region is disposed on each engagement face to enable compression of the fibrous strip passing longitudinally through the compression region. The first engagement face and the second engagement face are spaced from one another transverse to the compression region. A coupling element for a traversing device is arranged on the compressor assembly, which traverses the compressor assembly transversely to the two compression zones.

According to the invention, the compressor unit has a third engagement surface for supporting the compressor unit on the drafting rollers during operation of the drafting system. The third engagement surface is disposed between the first engagement surface and the second engagement surface and is longitudinally offset from the compression zone. By means of this third engagement surface, the compressor unit can be supported very stably on the drawing rollers without this support hindering the tight positioning of the compressor unit and the calender unit on the other rollers of the drawing system. By this close positioning of the compressor unit and the calender unit on the drafting system rollers, it is also possible to position the take-off roller of the calender unit on the drafting roller interacting therewith in such a way that the filaments produced by the take-off roller wrap around the drafting roller only at a small angle. This low angle of wrap makes spinning very stable, producing both uniform filaments and virtually no filament breakage.

It is particularly advantageous if the third engagement surface or the element comprising this engagement surface forms a coupling element for the traversing device. In this way, the engagement surfaces both ensure an exact positioning of the first engagement surface and the second engagement surface relative to the drafting rollers and also promote such an exact positioning of the two engagement surfaces even during the traversing of the compressor assembly. In this way, tilting of the compressor unit relative to the drawing rollers can be avoided, so that during the traversing the guiding of the fiber band in the compression region is ensured without the filaments leaving the compression region laterally.

If the third engagement surface has a side for contacting the traversing means, a precise displacement can be carried out transversely to the course or the compression region of the fiber band. The limiting active surface of the traversing means can exert a certain lateral force on the third engagement surface.

If the side of the third engagement surface is beveled, it is easy to feed the engagement surface into the traversing means. That is, the engaging surface is lifted together with the pinch roller unit to be opened by the draft roller to open the draft system while the traverse device remains at its original position. If the drafting system is closed, the pinch roller unit will be returned back to the drafting rollers together with the compressor unit. To effect traversing of the compressor unit, the third engagement surface is coupled to a traversing device. When the third engagement surface is beveled on its side, the traversing means and the compressor unit may be positioned differently, so that the coupling is easier to achieve.

It is particularly advantageous if the third engagement surface is arranged on the retaining means. This enables a stable embodiment of the three engagement surfaces. It has proven to be particularly advantageous if the retaining means with the three engagement surfaces is produced by injection molding from plastic, or in a particularly durable embodiment, the engagement surfaces, which are themselves produced from a wear-resistant material, are attached to the retaining means.

In an advantageous embodiment of the invention, the holding device is provided with a receiving element for receiving the compressor unit in the pinch roller unit of the drafting system, so that when the drafting device is opened, the drafting roller is ensured to lift the compressor unit together with the pinch roller unit. The receiving element can also be used to ensure that, for example, a loading spring arranged thereon presses the compressor unit firmly against the drawing roller, in order to allow a secure guidance of the fiber band without individual filaments slipping out of the compression region laterally.

If the curvature of the first and second engagement surfaces preferably each substantially corresponds to the grooved cylindrical section of the drafting roller determined for it and the length of the third engagement surface projects into this cylindrical section in order to be able to bear on the non-grooved cylindrical section of the drafting roller, it is ensured that the first and second engagement surfaces abut precisely on the drafting roller without an impermissible play.

The inventive roller unit for two juxtaposed drafting systems of a textile machine comprises a compressor unit, a base body and two twin rollers which are composed of two rollers and two drawing rollers and are accommodated in the base body. The double rollers can be placed on a common drafting roller. The compacter unit comprises at least one mechanism for fastening the compressor unit to the base body of the compacter unit. The compressor unit comprises a first and a second engagement surface that can abut the draft rollers during operation of the draft system. A compression region is disposed on each engagement face to enable compression of the fibrous strip passing longitudinally through the compression region. The first and second engagement surfaces are spaced apart from one another transversely to the compression region and are each arranged between the pinch and take-off rollers of the two double rollers. The compressor unit is arranged on the base body of the calender unit in such a way that it can be moved transversely to the two compression regions.

According to the invention, the compressor group is configured as described above. The compressor unit has a third engagement surface for supporting the compressor unit on the drafting rollers during operation of the drafting system. The third joining surface is arranged between the first joining surface and the second joining surface and is offset in the longitudinal direction from the compression region. The arrangement of this third engagement surface provides space for the compressor unit to rotate around the drafting rollers at different positions, which may be very close to the remaining drafting rollers. Especially when this position is very close to the remaining drafting rollers, the filaments wrap around the delivery rollers only at a small angle due to the fixed arrangement of the other threads in the ring spinning machine. This makes it possible in particular to achieve more stable spinning with only a small number of yarn breaks.

The drafting system according to the invention is equipped with drafting rollers at the outlet of the drafting system and a calender unit for two juxtaposed drafting systems of a textile machine, in particular a ring spinning machine. The calender unit comprises a base body and two double rollers which consist of two calender rollers and two extraction rollers and are accommodated in the base body. The double rollers can be placed on the drafting rollers. The compressor unit includes a first engagement surface and a second engagement surface that abut the draft rollers during operation of the draft system. A compression region is disposed on each engagement face to enable compression of the fibrous strip passing longitudinally through the compression region. The first engagement surface and the second engagement surface are spaced apart from each other transversely to the compression region and are arranged between the pinch roller and the take-off roller, respectively. The drafting system comprises a traversing device. The compressor assembly comprises a coupling element for connecting the compressor assembly to the traversing device and for traversing the compressor assembly transversely to the two compression zones.

According to the invention, the compressor group is configured as described above. The compressor unit has a third engagement surface for supporting the compressor unit on the draft rollers during operation of the draft system. The third engagement surface is disposed between the first engagement surface and the second engagement surface and is longitudinally offset from the compression zone. This allows the compressor unit to be optimally positioned in the drafting system, and the compressor unit can be supported very stably on the drafting rollers even when the compressor unit traverses.

In an advantageous embodiment of the invention, the third engagement surface forms a coupling element for the traversing device, so that a stable and tilt-free traversing of the compressor unit on the drawing roller is possible. In addition, by opening and closing the drawing system, the feeding and drawing can be performed quickly and easily.

If the third engagement surface advantageously has a side surface for contacting the traversing means, this likewise facilitates precise traversing of the compressor assembly, since the side surface is able to transmit forces into the compressor assembly very well.

It is particularly advantageous if the traversing device comprises a traversing tongue which engages as a fork or lug on the third engagement surface. In particular, when the drawing system is opened and closed, the coupling between the compressor unit and the traverse tongue of the traverse device can be realized very quickly and reliably. By configuring the traverse tongues as forks or lugs, at the same time a reliable coupling of the compressor unit to the traverse device can be ensured.

In a particularly advantageous embodiment, the fork or lug comprises a cheek surface interacting with a side surface of the third engagement surface. At the same time, a planar contact can be established between the traversing tongue and the compressor unit, which ensures reliable traversing.

In a preferred embodiment of the invention, the lateral and/or buccal surfaces are of beveled design in order to make it particularly easy to feed the third engagement surface into the traversing device when the pressure roller unit is placed onto the drafting roller. In particular, if the position of the traverse device or the traverse tongue is changed when the draft system is opened, stable yarn feeding can be performed even if the side surface or the cheek surface is inclined.

If the traverse tongue preferably has a support surface for supporting on the drafting roller, the position of the traverse tongue in the horizontal direction is determined by the drafting roller. During the displacement of the traverse tongue piece along the axial direction of the draft roller, the traverse tongue piece can be guided by the draft roller. During the coupling of the compressor assembly with the traverse tongues, the third engagement surface or the elements of the compressor assembly comprising this third engagement surface can only enter the corresponding openings of the traverse tongues, without the traverse tongues being offset in the vertical direction.

It is particularly advantageous if the calender rolls form a negative overhang with respect to the drafting rolls. This means that in the side view of the drafting system the angle between the drafting line and the straight line through the centre points of the drafting and calender rollers is less than 90 °. The fiber band can be guided particularly well when it enters the nip between the calender and the draw roller.

It is particularly advantageous if the take-off roller makes an angle of less than 90 °, preferably less than 30 °, with the filaments exiting from the drawing system. This significantly improves spinning stability, since a reduction in filament breakage can be expected.

Drawings

Further advantages of the invention are described below in connection with the examples. In the figure:

figure 1 shows a longitudinal section of a closed drafting system according to the invention;

figure 2 shows a longitudinal section of the drafting system of figure 1 in an open position;

FIG. 3 illustrates a bottom view of the compressor package according to the present invention;

figure 4 shows a top view of the bottom roller of the drafting system according to the invention; and

figure 5 shows a front cross-sectional view of a drafting system according to the invention.

Detailed Description

In the following description of the illustrated alternative embodiments, the same reference numerals are used for the same and/or at least equivalent features in the design and/or mode of action of these embodiments. If these features are not explained in detail again, their design and/or mode of action correspond to the design and mode of action of the features already described.

Figure 1 shows a longitudinal section of a closed drafting system 1 according to the invention. The drafting system 1 has a pair of feed rollers 2, a pair of draft belts 3 and a pair of delivery rollers 4. In the delivery roller 4, a pinch roller 6 and a take-off roller 7 are arranged on the lower draft roller 5. In the closed drafting system 1, the top roller 2.2, the top belt 3.2, the pinch roller 6 and the draft roller 7 of the feed roller pair 2 are located on the bottom roller 2.1, the belt 3.1 and the draft roller 5.

The pinch roller 6 and the take-off roller 7 are arranged in a pinch roller unit 8. The pinch roller unit 8 comprises a base body 9 and a spring 10 acting on a compressor unit 11. The top roller 2.2, the upper belt 3.2 and the pinch roller unit 8 with the pinch roller 6 and the take-off roller 7 are fastened in a pressure arm (not shown in the figure) of the drafting system 1. The calender roller 6 and the draft roller 7 are each designed as a double roller, i.e. two adjacent drafting systems 1 can be operated by a press arm and the two

rollers

6, 7 are connected to one another by a common shaft.

The compressor block 11 arranged in the calender unit 8 has a first engagement surface 12, a second engagement surface 13 (not visible in this figure) and a third engagement surface 14. The first engagement surface 12 and the second engagement surface 13 are both located between the pinch roller 6 and the plucking roller 7. The third engagement surface 14 is arranged between the axially spaced pinch rollers 6 of the double roller. The first bonding surface 12, the second bonding surface 13, and the third bonding surface 14 are supported by the draft roller 5. Preferably, their curvature substantially corresponds to the cylindrical shape of the draft rollers 5. The compressor unit 11 is pressed with its contact surfaces 12, 13 and 14 against the draft roller 5 by means of a spring 10. For this purpose, the spring 10 is connected in a rotatable manner to the receiving element 23 of the compressor unit 11.

The first engagement surface 12, the second engagement surface 13 and the third engagement surface 14 are arranged on a holding means 24 of the compressor package 11. While the first engagement surface 12 and the second engagement surface 13 are spaced apart from each other in the axial direction of the calender roller 6 or the draft roller 7, the third engagement surface 14 is arranged substantially centrally in the axial direction between the first engagement surface 12 and the second engagement surface 13 and spaced apart from them in the circumferential direction of the draft roller 5. Thereby, the third bonding surface 14 can realize position-accurate support of the first bonding surface 12 and the second bonding surface 13. The first bonding surface 12 and the second bonding surface 13 can be very stably arranged on the draft roller 5 via the third bonding surface 14. This makes it possible to match them very precisely with one another. The precise arrangement of the first engagement surface 12 and the second engagement surface 13 by the position of the third engagement surface 14 ensures that the fiber band 17 can be reliably guided in the compressor block 11 without the filaments of the fiber band 17 being able to escape laterally from the compressor block 11.

A particular advantage of this support of the engagement surfaces 12, 13 by the third engagement surface 14 is that the calender unit 8 can be arranged rotatably about the draft roller 5, so that the negative overhang angle (vorhangwinlkel) 20 of the calender 6 relative to the draft roller 5 can be adjusted. A negative overhang angle 20 means that the centre of the calender 12 is arranged in front of the centre of the calender 5 with respect to the course of the fibre band 17. This also results in a small wrap angle 21 of the fiber band 17 on the take-off roller 7, i.e. less than 90 °, preferably less than 30 °. By such a small packet angle 21, a very stable spinning is achieved, since yarn breakage can be significantly reduced. The reason why a negative overhang angle 20 or a so rotating calender unit 8 can be achieved is that the first engagement surface 12 and the second engagement surface 13 are not supported between the calender 6 and the belt 3.2, but are for this purpose laterally offset between the calender 6 of two adjacent drafting systems 1.

The compressor assembly 11 is coupled to the traverse tongue 15 of the traverse device. The traverse tongues 15 are also connected to a compressor 16, which compressor 16 guides the fibre band 17 into the drafting system 1. The transverse tongues 15 are coupled to the compressor assembly 11 by means of a fork 18, which fork 18 engages around the compressor assembly 11 in the region of the third joint surface 14. The third engagement surface 14 forms a coupling element for the traversing means. The coupling is such that the compressor unit 11 can slide out of the traverse tongues 15 or the forks 18 when the drafting system 1 is opened. If the drawing system 1 is closed again, the compressor unit 11 or the third engagement surface 14 again enters the fork 18 of the traverse tongue 15.

The transverse tongues 15 can be coupled to move the compressor unit 11 back and forth in the same manner as the transverse tongues 15 move back and forth in the axial direction of the roller. By means of this traversing of the compressor unit 11, the fiber band 17 is clamped to the drawing roller 5 at different axial positions of the calender roller 6 or the take-off roller 7. Since the contact point may be constantly changing, wear on the pinch roller 6 or the take-off roller 7 can be reduced.

In order to position the traverse tongue 15 in the radial direction of the draft roller, the traverse tongue 15 or the fork 18 has a support surface 19, and the support surface 19 abuts against the draft roller 5. When the traverse tongue piece 15 traverses axially on the draft roller 5, the support surface 19 slides reciprocally in the axial direction.

Fig. 2 shows a longitudinal section of the drafting system 1 of fig. 1 in an open position. In this figure, the upper feed roller 2.2, the upper belt 3.2 and the pinch roller unit 8 with pinch roller 6 and take-off roller 7 are lifted from the lower roller 2.2, the belt 3.1 and the draft roller 5. In particular, the coupling between the compressor unit 11 and the traverse tongues 15 can be seen in this figure. The compressor unit 11 is decoupled from the traversing tongue 15 or its fork 18 together with the calender unit 8. The third engagement surface 14 is moved away from the yoke 18. The traverse tongue 15 and the fork 18 remain on the draft roller 5 via the support surface 19. When the drafting system 1 is closed again, the compressor assembly 11 is lowered again together with the other components, so that the third engagement surface 14 again enters the fork 18, rests against the calender 5 and passes laterally through the fork 18, see fig. 1.

Fig. 3 shows a bottom view of the compressor package 11 according to the invention. The central component of the compressor package 11 is the retaining mechanism 24. At the respective ends of the retention means 24, a first engagement surface 12, a second engagement surface 13 and a third engagement surface 14 are arranged. A compression region 22 is provided in each of the first engagement surface 12 and the second engagement surface 13. The fibre band 17 enters the compression zone 22 and is compressed therein. The compression region 22 forms a substantially closed channel together with the draft roller 5 against which the first and second bonding surfaces 12 and 13 abut, so that the fiber band 17 can be prevented from being laterally removed from the channel of the compression region 22 at each stage.

As regards the receiving elements 23, which in this embodiment are located on the engagement faces 12, 13 and 14 on the opposite side of the holding means 24, the compressor unit 11 is connected to the roller unit 8 by means of the spring 10 (see fig. 1 and 2).

In the region of the third engagement surface 14, the traversing tongue 15 is coupled to the compressor unit 11 by the retaining means 24 or the configuration of the retaining means 24. The fork 18 traversing the tongue 15 laterally loops over the retaining means 24 or the third engagement surface 14. During the movement of the traverse tongue 15 transversely to the course of the fiber band 17, the compressor unit 11 is displaced laterally back and forth together with the traverse tongue 15. The contact points between the third engagement surface 14 and the fork 18 traversing the tongue 15 are the cheek 25 of the tongue 15 and the third engagement surface 14 or the side 33 of the holding means 24. Advantageously, when the compressor assembly 11 is coupled to the traverse tongues 15, a slight play exists between the cheek 25 and the flank 33 in order to ease threading. Furthermore, in this embodiment, the buccal surface 25 is configured as a ramp to facilitate threading. This enables coupling when the drafting system 1 is closed, even if the lateral deviation between the traverse tongue 15 and the compressor assembly 11 is small.

Fig. 4 shows a top view of the bottom roller of the drafting system 1 according to the invention and the traversing device comprising the traversing tongue 15 and the traversing tappet 28. The figure also shows two drafting systems 1 arranged in parallel. The traversing tongue 15 is arranged between the two drafting systems 1. The traverse tongue 15 is also fastened to the traverse tappet 28 and can be traversed back and forth according to the double arrow direction C.

In contrast to the previous exemplary embodiment, the traversing tongue 15 has a lug 29 instead of the fork 18. The lug 29 makes the bearing surface 19 of the traversing tongue 15 wider and more stable.

The illustration in fig. 4 also shows the structure of the draft rollers 5. The drafting roller 5 comprises a cylindrical section with a grooved region 26 and a smooth region 27. The first and second joining

surfaces

12, 13 are located on a grooved region 26 of the draft roller 5. The third joining surface 14 is supported between the two drafting systems 1 in a smooth region or cylindrical section 27 of the drafting rollers 5.

In the groove region 26 of the draft roller 5, the pressure line 30 of the pressure roller 6 and the pressure line 31 of the take-off roller 7 are indicated by dashed lines. As shown, the pressure line 30 of the calender 6 is offset in the direction of the lower belt 3.1 relative to the center line S of the draft roller 5. The sag V is negative. This is possible because the support for the first engagement surface 12 and the second engagement surface 13 is not arranged between the belt 3.1 and the calender roller 6, but rather is offset laterally into the smooth region 27 of the draft roller 5. As a result, the pressure line 31 of the take-off roller 7 travels closer to the centre line S, so that the fibre band 17 wraps around the take-off roller 7 only at a very small angle.

Figure 5 shows a front cross-sectional view of a drafting system 1 according to the invention. The cross section passes through the first joint surface 12, the second joint surface 13 and the third joint surface 14. In the first joint face 12 and the second joint face 13, a compression region 22 can be seen, which forms a channel that can be used to convey the fiber band 17. The two joining

surfaces

12 and 13 are located on the grooved region 26 of the draft roller 5. Between the first engagement surface 12 and the second engagement surface 13, a third engagement surface 14 can be seen. The third bonding surface 14 is located in the smooth region 27 of the draft roller 5. The bearing surface 19 of the traverse tongue 15 is likewise located in this region. In this embodiment, both the cheek 25 of the traverse tongue 15 and the side 33 of the third engagement surface 14 are beveled. Even if there is a certain deviation between the traverse tongue 15 and the third engagement surface 14, the third engagement surface 14 can easily be threaded into the fork 18 or the lug 29 of the traverse tongue 15.

The diameter of the groove region 26 of the draft roller 5 is slightly greater than the diameter of the smooth region 27 of the draft roller 5. However, in order to obtain a stable and constant contact of the first engagement surface 12 and the second engagement surface 13 with the calender 6, there is a corresponding height deviation h between the first engagement surface 12 and the second engagement surface 13 and the third engagement surface 14. The length of the third engaging surface 14 or the holding means 24 thereof can compensate for the difference in diameter of the draft rollers 5.

The invention is not limited to the embodiments shown in the drawings and described herein. Combinations of features shown and described in different embodiments are equally possible within the scope of the claims.

List of reference numerals

1 drafting system

2 input roller pair

2.1 bottom roller

2.2 Top roller

3 drafting belt pair

3.1 lower leather Belt

3.2 Upper epithelial band

4 delivery roller

5 drafting roller

6 compacting roller

7 pulling roller

8 compacting roller unit

9 base body

10 spring

11 compressor unit

12 first joint surface

13 second bonding surface

14 third joint surface

15 transverse tongue

16 compressor

17 fiber band

18 shifting fork

19 bearing surface

20 negative overhang angle

21 wrap angle

22 compression zone

23 receiving element

24 holding mechanism

25 buccal surface

26 fluted area

27 smooth region

28 Traverse tappet

29 ear handle

30 pressure line of compacting roller

Pressure line of 31 pulling roller

32 shaft

33 side surface

C transverse movement

S central line

Degree of V overhang

h height deviation

Claims

1. Compressor group for two juxtaposed drawing systems (1) of a textile machine, comprising:

a holding mechanism (24) for holding the holding mechanism,

wherein a first joining surface (12) and a second joining surface (13) which can be brought into abutment against the drafting rollers (5) during operation of the drafting system (1) are arranged on the holding means (24),

wherein a compression region (22) is arranged on each of the joining surfaces (12, 13) in order to be able to compress a fibre band (17) which passes longitudinally through the compression region (22),

wherein the first joint face (12) and the second joint face (13) are spaced apart from each other transversely to the compression region (22); and

a coupling element for a traversing device which traverses a compressor unit (11) transversely to the two compression zones (22),

it is characterized in that the preparation method is characterized in that,

the compressor unit (11) has a third attachment surface (14) which supports the compressor unit (11) on the drafting rollers (5) during operation of the drafting system (1) and which supports the compressor unit (11) on the drafting rollers (5)

Wherein the third joint face (14) is arranged between the first joint face (12) and the second joint face (13) and is arranged offset in the longitudinal direction from the compression region (22).

2. Compressor assembly according to claim 1, characterized in that the third engagement face (14) forms the coupling element for a traversing device.

3. Compressor assembly according to claim 1, wherein the third engagement surface (14) has a side surface (33) for contacting the traverse device.

4. Compressor unit according to claim 3, characterized in that the side faces (33) are beveled to feed the thread into the traversing device.

5. The compressor train according to claim 1, characterized in that the third engagement surface (14) is arranged on the retaining means (24).

6. Compressor assembly according to claim 1, characterized in that a receiving element (23) for receiving the compressor assembly (1) in a calender unit (8) of the drafting system (1) is arranged on the holding means (24).

7. Compressor assembly according to claim 1, characterized in that the curvature of the first engagement surface (12) and the second engagement surface (13) each corresponds to the grooved cylindrical section (26) of the drafting roller (5) determined for it, and the length of the third engagement surface (14) projects into this cylindrical section (26) in order to be able to bear on the non-grooved cylindrical section (27) of the drafting roller (5).

8. A calender unit for two juxtaposed drafting systems (1) of a textile machine, comprising:

a compressor unit (11);

a base (9); and

two double rollers, which consist of two pinch rollers (6) and two take-off rollers (7) and are accommodated in the base body (9) and can be placed on a common drafting roller (5),

wherein the calender unit (8) comprises at least one means for fastening the compressor unit (11) to the base body (9) of the calender unit (8), and

the compressor unit (11) has a first (12) and a second (13) contact surface that can be brought into contact with the drafting rollers (5) during operation of the drafting system (1), and

wherein a compression region (22) is arranged on each of the two joining surfaces (12, 13) in order to be able to compress a fiber band (17) which passes longitudinally through the compression region (22),

wherein the first engagement surface (12) and the second engagement surface (13) are spaced apart from one another transversely to the compression region (22) and are arranged between the two double-roller compacting rollers (6) and the extracting roller (7), respectively, and

wherein the compressor unit (11) is arranged on the base body (9) of the calender unit (8) in such a way that it can be moved transversely to the two compression regions (22),

it is characterized in that the preparation method is characterized in that,

the compressor unit (11) is constructed according to any one of claims 1 to 7,

The third joint surface (14) is arranged between the first joint surface (12) and the second joint surface (13) and is arranged offset in the longitudinal direction from the compression region (22).

9. A drafting system comprising drafting rollers (5) at the outlet of the drafting system (1) and a calender unit (8) for two juxtaposed drafting systems (1) of a textile machine,

wherein the roller unit (8) comprises a base body (9) and two double rollers, the two double rollers consist of two rollers (6) and two pulling rollers (7) and are accommodated in the base body (9), and the double rollers can be placed on the drafting rollers (5),

wherein the compressor unit (11) has a first (12) and a second (13) joining surface which are in contact with the drafting rollers (5) during operation of the drafting system (1), and

wherein the first engagement surface (12) and the second engagement surface (13) are spaced apart from one another transversely to the compression region (22) and are arranged between the calender roll (6) and the extractor roll (7), respectively, and

wherein the drafting system (1) comprises a traversing device, and

the compressor assembly (11) comprises a coupling element for a traversing device which traverses the compressor assembly (11) transversely to the two compression zones (22),

it is characterized in that the preparation method is characterized in that,

the compressor unit (11) is constructed according to any one of claims 1 to 7,

10. Drafting system according to claim 9, characterised in that the third engagement surface (14) forms the coupling element for the traversing device.

11. Drafting system according to claim 9, characterized in that the third engagement surface (14) has a side surface (33) for contacting the traverse device.

12. Drafting system according to any of claims 9 to 11, characterized in that the traversing means comprise a traversing tongue (15), the traversing tongue (15) looping the third engagement face (14) as a fork (18) or lug (29).

13. Drafting system according to claim 12, characterised in that the fork (18) or lug (29) comprises a cheek (25), the cheek (25) interacting with a side face (33) of the third engagement face (14).

14. Drafting system according to claim 13, characterized in that the side faces (33) and/or the cheek faces (25) are beveled to feed the third engagement face (14) into the traverse device when the compacter unit (8) is placed onto the drafting roller (5).

15. Drafting system according to claim 12, characterized in that the traverse tongue (15) has a bearing surface (19) for bearing on the drafting roller (5).

16. A drafting system as claimed in claim 9, characterised in that the calender (6) forms a negative suspension (V) with respect to the draft roller (5).

17. Drafting system according to claim 9, characterized in that the plucking roller (7) makes an angle (21) of less than 90 ° with the fiber band (17) exiting from the drafting system (1).

18. Drafting system according to claim 17, characterized in that the plucking roller (7) makes an angle (21) of less than 30 ° with the fiber band (17) exiting from the drafting system (1).