EP3030702A1

EP3030702A1 - Cleaning device for a combing cylinder of a combing machine

Info

Publication number: EP3030702A1
Application number: EP14747129.6A
Authority: EP
Inventors: Daniel Bommer; Ueli Stutz
Original assignee: Maschinenfabrik Rieter AG
Current assignee: Maschinenfabrik Rieter AG
Priority date: 2013-08-06
Filing date: 2014-07-08
Publication date: 2016-06-15
Anticipated expiration: 2034-07-08
Also published as: CN105431580B; WO2015019139A1; JP2016529413A; EP3030702B1; CH708416A2; CN105431580A

Abstract

The invention relates to a cleaning device for a combing segment (7), which consists of comb fittings (6), of a combing machine round comb (4), which is rotatably mounted by means of a shaft (5) and which combs a tuft (FB) protruding from a clamping point (KS) of a clamping assembly (1). The cleaning device comprises at least one cleaning element (44), which is arranged in the region of the enveloping circle (HK) of the combing segment (7) of the round comb (4), for cleaning the comb fittings (6) of the combing segment (7) during a comb operation. The aim of the invention is to improve the cleaning effect for the combing segment of the round comb. This is achieved in that at least one additional cleaning element (60) is arranged in the region of the enveloping circle (HK) of the combing segment (7) of the round comb (4).

Description

Cleaning device for a combing cylinder of a combing machine

The invention relates to a cleaning device for a Kämmgarituren existing Kämmsegment one, rotatably mounted on a shaft round comb of a comber, which combs a, from a nip of a nipper aggregate outstanding tuft, arranged with at least one, in the region of the outer circle of the combing segment of the circular comb Cleaning element for cleaning the combings of the combing segment during a comb play.

The combing machines customary today usually have eight combing heads arranged next to one another. In this case, the, in the form of Wattebahnen the respective nipper unit of each combing head supplied fiber mass is clamped by the nipper unit during the combing process. The end of the fiber mass which projects out of the respective nipper unit ("pincer" for short) is usually called a fiber tuft and the tuft is grasped and combed out by a combing member of a combing segment of a circular comb The disintegrated components (short fibers, nits, dirt, etc.) are transported downwards via the combing assembly, where they reach an area in which bristles of a brush roll enter the enveloping circle The direction of rotation of the brush roller is in the above-mentioned range usually the same as the direction of rotation of the circular comb, wherein the peripheral speed of the brush roller is greater than that of the circular comb Components were stripped and discharged under the action of a suction to a suction channel. The suction channel connected to a vacuum source is connected to a housing in which the brush roller is rotatably mounted. This housing at least partially encloses also the above the brush roller mounted combing cylinder. Thus, the applied negative pressure acts into the area above the circular comb and supports the retraction of the tuft in the combing during the combing process.

CONFIRMATION COPY In the known embodiments, however, it has been shown that the previously used cleaning of the combing set by the brush rollers in view of increasing Kammspielzahlen is no longer sufficient. That is, the brush roller is no longer able at high Kammspielzahlen to completely removed during the Auskämmvorgang between the Kämmgarnituren material to maintain a consistent Kämmqualität. Partly it is attempted to keep the combing set clean with specially programmable cleaning intervals in which the comber is operated for a short time with a lower comb count while the speed of the brush roll is increased. If this special cleaning period is increased even further, the wear of the bristles of the brush roller increases. The radial distance between the axis of the circular comb and the axis of the brush roller must then be adjusted often, bringing the productivity decreases.

In published DE-102 32 587 A1, an apparatus for removing the loosened from the combing of a circular comb in the presented tufts impurities is proposed. In this case, a suction device is provided within the circular comb, which has radially outwardly guided suction openings. There are several suction openings provided, in which the clothing of the circular comb is interrupted. The suction openings, which rotate with the rotation of the circular comb, exert a partial cleaning effect only there on the clothing, which they are directly assigned. The other clothing elements that are outside the effective range of the suction openings are not detected by the, applied to the suction vacuum and thus not cleaned of deposits. The device shown here is only intended for the removal of loose contaminants from the tuft presented by the tongs. For the removal (cleaning) of combed during combing and settled between the Kämmgarnur components, the embodiment described above is not suitable.

The round comb (or round combs) of a combing machine is one of the essential components, which is responsible for the quality of the combing result. Therefore, it is necessary to maintain the full function, or the operation of the circular comb over as long a period as possible. The invention is therefore based on the object to propose a cleaning device for the entire combing a combing segment of a circular comb, which ensures optimum cleaning of the combing even at high Kammspielzahlen, and thus a constant Kämmleistung of, or the circular combs over a long period guaranteed.

To solve this problem, it is therefore proposed that at least one further (at least additionally a second) cleaning element is arranged in the region of the enveloping circle of the combing segment of the circular comb. By additionally proposed cleaning element, which also acts as a first cleaning element, from the periphery of the enveloping circle of Kämmsegmentes, acting on the clothing elements cleaning, the cleaning effect is significantly improved. In other words, the cleaning elements arranged one after the other in the region of the enveloping circle of the combing segment complement one another in the cleaning action. Due to the step-by-step cleaning process, the cleaning work is split over two cleaning elements, thus optimizing the cleaning effect.

Furthermore, it is proposed that a cleaning element is a mechanical cleaning element and the further cleaning element is a pneumatic cleaning element, wherein - seen in the direction of rotation of the circular comb - the pneumatic cleaning element is connected downstream of the mechanical cleaning element.

By this proposal to carry out the cleaning of the respective cleaning stage with different agents, the cleaning effect can be increased. Both cleaning levels can be coordinated with each other.

Advantageously, it is further proposed that the mechanical cleaning element consists of a, at a radial distance to the shaft of the circular comb rotatably mounted cleaning brush, which has cleaning elements whose outer circle intersects with the outer circle of Kämmsegmentes and the further cleaning element consists of a, connected to a vacuum source suction whose suction opening extends at a radial distance and over a partial region of the enveloping circle of the combing segment. Due to the additional attachment of a suction channel (seen in the direction of rotation of the circular comb) between the area in which the brush roller protrudes into the outer circle of the combing segment and the nip of the pliers, it is possible that the, located between the Kämmgarnituren, combed material which is not through the bristles of the brush roller has been removed, is sucked through the suction port of the additional suction channel. Ie. the pneumatic cleaning element in the form of a suction channel has the task to suck the remaining components, which are still located between the Kämmgarnuren and remove. Thus, the cleaning work of the combing segment of the circular comb is divided into two places, making the cleaning work is more effective. This makes it possible to keep constant the combing effect of the circular comb over a long period, even at high Kammspielzahlen.

Furthermore, it is proposed that at least a portion of the cleaning brush is surrounded by a housing which is connected to a further vacuum source. This ensures that the, stripped by the bristles of the brush roller from Kämmsegment material is sucked off and disposed of by the bristles on the, applied to the housing vacuum and connected to the housing channel of the bristles. That this material is discharged via the channel to a central collection point.

It is advantageous if, as further proposed, the cleaning brush and at least portions of the circular comb is surrounded by a housing which is connected to the further vacuum source. Thus, the part of the circular comb is detected by the negative pressure, welpher directly adjacent to the outer circle of Kämmgarnur. As a result, also such material components (eg fiber fly) are detected by the negative pressure, which move outside the Kämmgarnituren and discharged down into the channel for transfer to the central collection point. At the same time, the negative pressure applied in the housing assists in pulling the tuft into the area of the furrows.

Furthermore, it is proposed that - seen in the direction of rotation of the circular comb - the rear side wall of the suction of the further cleaning element, which is extends along the axis of the shaft of the circular comb, at least over a portion of an acute angle α with the suction port of the suction channel occupies.

That is, the rear side wall of the suction channel, which faces the upstream brush roller, extends in the direction of a tangent to the enveloping circle of the Kämmgarnitururen at an acute angle α to the suction opening of the suction channel. The suction opening can form an approximately flat surface, which is opposite to the enveloping circle of the Kämmgarnitur in the distance. It is also conceivable that the suction opening slightly curved to the contour of the outer circle of the Kämmgarnituren runs at a small distance. This distance between the suction opening and the enveloping circle of the combing set can be between 0.5 and 5 mm. It is to be kept as small as possible, so that no additional air flows in the area between the nip of the pincers and the subsequent Abreisswalzen caused by the additional negative pressure on the suction channel, which negatively affects the combing or the tearing and soldering process. In addition, by appropriate inserts in the housing or by appropriate shaping of the housing, the area between the brush roller and the suction port of the suction so partitioned off against each other, so that the brush suction (Saugluftstrom SA) has no negative impact on the downstream pneumatic suction. The suction air flow SA would otherwise counteract the suction air flow SL.

Due to the claimed orientation of the rear side wall of the suction channel and the Saugluftströmung generated in the suction passage in the tangential direction to the outer circle of the Kämmgarnur with which an optimal suction is achieved to suck the material located between the Kämmgarnuren and dispose.

Likewise, no air circulation is generated by the appropriately aligned suction air flow, which can have a negative effect on the tear-off and soldering process.

By arranged at an acute angle rear side wall is made possible that the cross section of the suction opening is greater than the cross section of the subsequent suction channel. Thus, the suction effect can be improved. That It is thus achieved a larger suction area.

Due to the further proposal to attach a sensor to the suction channel of the further cleaning element for detecting the amount of material extracted, makes it possible to make controls on the comber based on the measured values. The sensor is connected to a central control unit. For example, the speed of the brush roller can be controlled via the control unit. Climb z. For example, the amount of extracted material in the suction continuously, so this may be an indication that the cleaning work of the brush roller steadily decreases. This can be z. B. caused by wear of the bristles, whereby the radial feed of the brush roller to the axis of the circular comb is required. This can be done manually (with the machine off) or automatically during operation via an actuator. On the other hand, the rotational speed of the brush roller can also be increased to increase the cleaning effect, provided that the wear of the bristles is not the cause of the deterioration of the cleaning effect. That is, with the sensor in the suction, the cleaning effect of the upstream brush roller can be monitored.

It is further proposed that the shaft of the circular comb and the shaft of the cleaning brush are connected via drive means with a common drive motor and at least one gear stage between the common drive motor and the shaft of the cleaning brush and / or the shaft of the circular comb is provided. Thus, it is possible to make do only with a common drive motor, the different speed ratios over the or the intermediate gear stages are achieved.

A compact design is achieved when the suction of the further cleaning element following the integrated vacuum in the suction channel opens into a common, connected to the other vacuum source suction channel which is connected to the housing which surrounds the cleaning brush at least partially. Thus, the material discharged from two cleaning points is combined to form a common disposal line, which transfers it to a central collection point.

The cleaning device according to the invention can also be used for a circular comb on which in addition to the combing segment a tear-off segment (Heilmann design) is attached. The invention relates to a combing machine with at least one cleaning device. In general, a comber knows eight combing heads, each with a combing cylinder and an associated brush roller, each combing cylinder is associated with an additional suction channel. In this case, the additional channels can be merged into a common channel, to which a common first vacuum source is attached.

It is also conceivable to associate each individual additional channel or groups of additional channels with a first sub-source.

Further embodiments of the invention will be described in more detail with reference to subsequent embodiments and shown.

Show it:

1 is a schematic side view of a known combing a

comber

2 shows a schematic side view of a combing head with an additional channel according to the invention

3 is a schematic partial view of Figure 3 with another drive variant Figure 4 is a schematic side view X of Figure 3

FIG. 1 shows a known embodiment of a combing head (of several) of a combing machine with a nipper unit 1 (called "pincer" for short), which is mounted in a pivotable manner via the crank arms 2, 3. In this case, two crank arms 2 each side of a circular comb 4 (also called Kämmzylinder) pivotally mounted on the circular comb shaft 5. The other end of the pivot arms 2 is rotatably mounted on axes 13 on a clamp frame 8. The rear pivot arm 3 (there may also be two) is rotatably mounted on a gun shaft 10. The opposite free end of the pivot arm 3 is rotatably connected via a shaft 9 with the clamp frame 8.

The circular comb 4 has on a part of its circumference a comb segment 7, which, as indicated schematically, is provided with Kämmgarnituren 6. As already known, the Kämmgarnituren 6 can consist of individually lined up next to each other clothing strips S. In addition, in the direction of rotation D of the circular comb, see - several successive Garniturabschnitte A1 to A4 (so-called latch) may be provided, wherein the sections may be provided with different numbers of teeth. As a rule, the front clothing sections A1 (bars) have lower numbers of teeth than the rear clothing sections A4, while the lane width of the alleys G (FIG. 4) decreases rearwardly between the individual clothing strips S of the clothing sections A1-A4.

Instead of the circular comb shown here, a round comb can be provided with a tear-off segment additionally mounted on its circumference, which forms a nip in the tear-off with a tear-off roller deliverable to the tear-off segment. Such a design (Heilmann system) is z. Example, from published EP-2 044 249 B1. In the embodiment shown there, the lower tong plate is fixedly mounted while the upper tong plate performs a pivotal movement to form a nip with the lower tong plate for the fiber material.

In general, a plurality of combing heads are arranged side by side on a combing machine, each combing head having a pair of pliers 1. In the embodiments, however, the inventive attachment of an additional suction device is shown and described only on a single combing head.

The pliers 1 consists in the present example of one, with the pliers frame 8 fixedly connected lower pliers plate 12 and an upper pliers plate 14 (partially also called pliers blade), which is attached to two pivot arms 15, 15 '.

These pivoting arms are pivotally mounted on the tong frame 8 via a pivot axis 16. The pivot arms 15, 15 'are each connected to a spring leg 18, which are mounted via an axis 20 in the machine frame. Seen in the material flow direction F of the fiber material W to be processed, a first pair of rollers 24 is provided behind the forceps 1. This pair of rollers 24 is also referred to in practice as a "pair of unwinding rollers or a pair of detaching cylinders" and forms a tear-off clamping line K. The first pair of rollers 24 is followed by a second pair of rollers 25 in which the produced soldering point is still solidified. Schematically indicated is a fixed comb 11, which is fastened to the clamp frame 8 via means not shown. When tearing off the tuft FB is drawn into the clothing of the Fixkammes, with its end E is detected by the terminal point K of the subsequent first pair of rollers 24. As a result, the end E of the fiber tuft FB is placed like a tile on the end of the already existing fiber fleece V and soldered with this.

Within the pliers 1, a feed roller 27 is rotatably mounted, which is connected via a drive not shown in detail and performs a discontinuous rotational movement in order to transport the supplied cotton W in sections. The feed cylinder 27 has a shaft 28, via which it is rotatably mounted at both ends via bearings not shown in detail in bearing receptacles of the nipper frame. The drive of the feed roller 27 may, for. B. via a known jack drive, which is controlled by the movement of the upper tong plate 14. The feed roller 27 conveys the fibrous material W discontinuously in the direction of the tong lip 30 of the lower tong plate 12.

The combing takes place with the pliers 1 closed, in a rear position of the pliers, as shown in the embodiments of FIGS. 1 and 2. In this case, the end E of the fiber tuft FB protruding from the clamping point KS of the tongs 1 passes into the region of the Kämmgarnituren 6 of the Kämmsegments 7 of rotating in the direction of rotation D circular comb 4 and is combed out. The clamping force for holding the fiber W during the combing process is generated by the schematically illustrated strut 18, which is pivotally mounted on the machine frame MS via the axis 20.

After the combing process, the pliers 1 is pivoted into a foremost position (not shown) and simultaneously opened. In this case, the combed end E of the fiber tuft FB is placed on the end E1 of a previously partially transported back fiber web V and then transferred by the transport movement of the fiber web to the nip K of the first pair of rollers 24. During the described sequence of movements of the tuft FB enters the area of the needles of a fixed comb 11 which is fixed to the forceps frame 8. By the rotational movement of the first Roller pair 24, the fibers of the tuft FB, which get into the terminal point K pulled out of the tuft and soldered to the end of the web V. In this case, the tuft is pulled through the fixed comb 11, the nonwoven fabric is removed via the second subsequent roller pair 25 on a nonwoven table and then combined via known devices into a sliver and further transported.

The combed out during Auskämmvorgang components (short fibers, Nissen, dirt, etc.) are stored in large part between the lanes of Kämmgarnitur and are transported down, where they reach the area of a brush roller 44.

The brush roller 44 is rotatably mounted below the circular comb 4 via a shaft 46 in a housing 50, in which the circular comb 4 is located. The housing is completely closed and open towards the pliers 1. The brush roller 44 is connected to a motor MB via the drive element 33 and has bristles 45, with which they at an immersion point ET with its outer circle HB in the outer circle HK of the circular comb 4 and thus in the alleys G of the clothing strips S Kämmgarnur des Combing Kämmsegmentes 7 (Figure 4) and remove the combed out components located therein. The direction of rotation B of the brush roller is aligned in the region of the tangent to the circular comb in the direction of rotation D of the circular comb 4.

Under the action of a Saugluftströmung SA generated by a vacuum source P via the opening 51 in the lower region of the housing 50, the combed components that have been removed by the brush roller 44 from the combing segment 7, fed to a central disposal point not shown in detail. Following the opening 51, a suction channel 33 is mounted, which is in communication with the vacuum source P.

The volume of air discharged through the suction air flow SA is returned to the housing 50 through the openings of the surrounding air of the comber located above the housing 50.

The motor MB is controlled by a control unit ST, with which it is connected via the path 37. Furthermore, the control unit St is connected via a path 38 a further motor M (main motor) in connection via which further units of the comber are driven via corresponding drive connections and gear units. So z. B. the motor M via the drive member 40 with a transmission G1 (or transmission unit) in conjunction, which drives a tongs shaft 10 via the drive element 41. The transmission unit may be, for example, a slider-crank mechanism. Furthermore, the motor M is connected via the drive element 42 to a transmission G2, which drives the circular comb shaft 5 via the drive element 43. The portion of the combed components, which does not settle in the lanes of Kämmsegmente is sucked under the action of the suction flow SA directly inside the housing 50 down and transferred to the opening 51.

However, it has been shown that at higher Kämmspielzahlen and thus higher rotational speeds of the circular comb, the cleaning effect of the brush roller 44 is no longer sufficient to remove all components from the streets between the Kämmgarnur. As a result, the combing effect of Kämmgarnitur with each comb play deteriorates.

To counteract this, according to the invention, the attachment of an additional cleaning element in the form of an additional suction channel 60 is proposed, which is shown in the embodiment of FIG. The additional suction channel 60 is - seen in the direction of rotation D of the circular comb 4 - downstream of the brush roller 44 and located in the area between the immersion point ET of the brush roller 44 in the Hüllkreis HK the Kämmgarnitur 6 and the clamping point KS of the pliers 1. The suction channel 60 opens into a suction pipe 61 communicating with another negative pressure source P1.

The extracted under the action of the vacuum source P1 components are transferred via a channel 63 in the channel 35, via which they are supplied under the action of the suction source P of a central collection point, not shown.

The opening 65 of the suction channel 60 projecting toward the circular comb 4 has a distance a of 0.5 to 5 mm from the enveloping circle HK of the combing sets 6 of the circular comb 4. The opening 65 can run in a plane which has a minimum distance a from the enveloping circle HK. It is also possible, as shown in Figure 2, that the opening 65 extends arcuately in accordance with the contour of the enveloping circle HK and has a constant distance a (0.5 to 5 mm) to the enveloping circle HK. As shown in the schematic diagram sees X (Figure 3) in Figure 4 refer, extends - seen in the axial direction of the circular comb shaft 5 - the dashed line shown opening 65 of the suction channel 60 with the width c over the entire width b of the combing segment 7, which the Kämmgarnuren 6 has. This ensures that the entire circumferential surface of the Kämmgarnitur 7, which is guided past the suction channel 60, is detected by the suction air flow SL. So that a collision between the suction channel 60 and the tips of the clothing teeth of the combing set is reliably avoided, the circular comb 4 can be provided with lateral guide disks (not shown) on which the suction channel is supported.

This ensures compliance with a constant minimum distance between the opening 65 of the suction channel 60 and the enveloping circle HK of the Kämmgarnitur 6.

In order to produce an optimized suction air flow SL which is matched to the geometry of the teeth of the clothing and which allows almost complete removal of the combed components still present in the region of the clothing, the rear side wall 68 of the suction channel 60 is at an acute angle α to the opening 65 of the suction channel 60 is arranged. This results in a suction air flow SL in the direction of rotation D of the circular comb 4, which is aligned approximately tangentially to the base body GK of the circular comb. This suction air flow SL is aligned approximately vertically to the front tooth flanks, not shown, of the teeth of the combing set.

The small distance between the suction opening 65 and the enveloping circle HK of the Kämmgarnuren ensures that the air flow generated by the suction channel 60 is substantially limited to the region of the suction opening 65 and no uncontrolled air currents are generated within the housing 50, which the Combing and soldering process could negatively influence.

In order to seal off the region between the suction opening 65 and the brush roller 44, a triangular shielding element 22 is mounted within the housing 50, which extends parallel to the circular comb shaft 5 over the entire width of the housing. The arcuate surfaces of the shielding element 22, while standing at a small distance from the enveloping circle HK of the Kämmgarnuren, or the Hülikreis HB of the bristles 45 of the brush roller 44. This will ensure that through the In the housing 50 generated Saugluftstrom SA no disturbing counterflow to the suction air stream SL of the suction channel 60 is generated.

On the suction channel 60, a sensor 55 is attached in the present embodiment, which is connected via the line 56 to the control unit ST. About the sensor 55, the mass per unit time is detected, which is sucked off through the suction channel 60. This value is transmitted to the control unit ST via the line 56. Based on this value, certain control processes can be triggered in the control unit ST in comparison with a desired value. Increases e.g. the sucked amount steadily, so this is an indication of the decreasing cleaning effect of the upstream brush roller. This can e.g. caused by the wear of the bristles 45 of the brush roller 44. That The penetration depth of the bristles into the lanes between the Kämmgarnituren 6 has decreased by the wear-related shortening of the bristle lengths. This can be counteracted by z. B. the distance between the circular comb shaft 5 and the shaft 46 of the brush roller is reduced manually or automatically via an adjusting device. That via the control unit ST can e.g. an acoustic or optical signal for an operator to be generated, which then makes this adjustment manually when the machine is stationary. Furthermore, on the basis of the generated control signal, an adjusting device can also be controlled directly, which carries out the adjustment automatically without manual intervention and during operation. Since such adjusting devices for brush rollers are already well known, this adjustment was indicated schematically by a double arrow in the region of the shaft 46.

It is also conceivable to control the motor MB via the control unit ST on the basis of the signal emitted by the sensor in order to improve the cleaning action of the brush roller 44 by increasing the speed.

The inventive attachment of the additional suction channel 60, the cleaning work of the brush roller is supported. That is, the components not yet removed from the brush roller, which are still within the combing set, are detected and removed by the suction air flow of the subsequent suction channel. This means that a completely cleaned combing set is available for the subsequent combing process. As a result, the combing effect of the combing set can be kept constant over a long period of time. That means the cleaning effect becomes so increased overall, whereby an increase in Kammspielzahl is possible without reducing the combing effect.

In Figure 3, a simplified embodiment of the drive is shown. Wherein the circular comb 4 and the brush roller 44 are driven by a single motor M1. In this case, the motor M1, which is controlled by the control unit ST via the line 48, is connected via the drive element 49 to a transmission G2. The transmission G2 is on the one hand via the drive element 43 with the circular comb shaft 5 and on the other hand via the drive element 53 with a further gear G3 in combination. Via the drive element 54, the gear G3 is in drive connection with the shaft 46 of the brush roller 44. This simplified and cost-effective drive design can be used by the additional attachment of the additional cleaning stage, since a single drive of the brush roller for performing special cleaning periods is no longer necessary. The use of two differently acting cleaning elements (pneumatic and mechanical) overall results in an optimal and targeted cleaning effect of the combing segment and ensures over a longer period a constant combing effect of the combing segment. If necessary, other suction devices could also be arranged for cleaning in the region of the enveloping circle of the combing segment of the circular comb.

It would also be conceivable to arrange a further mechanical cleaning element as an additional cleaning element for the existing mechanical cleaning element in the form of a brush roller.

Claims

claims

1. cleaning device for a, of Kämmgarnituren (6) existing combing segment (7) of a shaft (5) rotatably mounted circular comb (4) of a comber, which, from a nip (KS) of a nipper unit (1) outstanding tuft ( FB) combs out, with at least one, in the region of the enveloping circle (HK) of the combing segment (7) of the circular comb (4) arranged cleaning element (44) for cleaning the Kämmgarnituren (6) of the combing segment (7) during a comb play,

characterized in that at least one further cleaning element (60) in the region of the enveloping circle (HK) of the combing segment (7) of the circular comb (4) is arranged.

2. Cleaning device according to claim 1, characterized in that a cleaning element is a mechanical cleaning element (44) and the further cleaning element is a pneumatic cleaning element (60), wherein - seen in the direction of rotation (D) of the circular comb (4) - the pneumatic cleaning element (60 ) is connected downstream of the mechanical cleaning element (44).

3. Cleaning device according to one of the preceding claims, characterized in that the mechanical cleaning element consists of a, at a radial distance to the shaft (5) of the circular comb (4) rotatably mounted cleaning brush (44), which cleaning elements (45) whose enveloping circle (HB ) intersects with the enveloping circle (HK) of the combing segment (7) and the further cleaning element consists of a suction channel (60) connected to a vacuum source (P1), the suction opening (65) of which is at a radial distance (a) and over a partial area the enveloping circle (HK) of the combing segment (7) extends.

4. Cleaning device according to claim, characterized in that the

the suction channel (60) of the further cleaning element - seen in the direction of rotation (D) of the circular comb (4) - between the interface (ET) of the enveloping circle (HK) of the combing segment (7) with the enveloping circle (HB) of the cleaning elements (45) Cleaning brush (44) and the clamping point (KS) of the nipper unit (1) is arranged.

5. Cleaning device according to one of claims 3 to 4, characterized in that at least a portion of the cleaning brush (44) by a housing (50) is surrounded, which is connected to a further vacuum source (P).

6. Cleaning device according to one of claim 5, characterized in that the cleaning brush (44) and at least portions of the circular comb (4) by a housing (50) is surrounded, which is connected to the further vacuum source (P).

7. Cleaning device according to one of claims 3 to 6, characterized in that - seen in the direction of rotation (D) of the circular comb (4) - the rear side wall (68) of the suction channel (60) of the further cleaning element, which is longitudinal to the axis (A ) of the shaft (5) of the circular comb (4), at least over a portion of an acute angle (a) with the suction opening (65) of the suction channel (60) occupies.

8. Cleaning device according to one of claims 3 to 7, characterized in that a sensor (55) is attached to the suction channel (60) of the further cleaning element for detecting the extracted amount of material.

9. Cleaning device according to claim 8, characterized in that the sensor (55) with a control unit (ST) is connected, which is for speed control with the drive (MB) of the cleaning brush (44) in communication.

10. Cleaning device according to one of claims 3 to 9, characterized in that the shaft (5) of the circular comb (4) and the shaft (46) of the cleaning brush (44) via drive means (43, 49, 53, 54) with a common Drive motor (M1) are connected and at least one gear stage (G2, G3) between the common drive motor (M1) and the shaft (46) of the cleaning brush (44) and / or the shaft (5) of the circular comb (4) is provided.

11. Cleaning device according to one of claims 5 to 10, characterized in that the suction channel (60) of the further cleaning element in connection i to the integrated vacuum in the suction channel (P1) in a common, with the further vacuum source (P) connected to the suction channel ( 35), which is connected to the housing (50) which surrounds the cleaning brush (44) at least partially. 12. Combing machine with at least one cleaning device (60, 44) according to one of the preceding claims.