EP1736576A2 - Device for cleaning a combing segment in a combing machine - Google Patents

Abstract

In apparatus for cleaning the comb segments of a circular comb in a combing machine, comprising a cleaning roller (17) parallel to and spaced from the round comb and with peripheral cleaning elements (18) temporarily contacting the segments during rotation of the roller, some of the cleaning elements differ from the other cleaning elements in geometrical location, geometrical pattern and/or material.

Description

The invention relates to a device for cleaning a combing segment of a circular comb of a combing machine with a cleaning roller rotatably mounted at a parallel distance from the circular comb axis, which is provided on its circumference with cleaning elements which come into contact with the combing segment temporarily during the rotational movement.

In a combing machine, as in part in the EP-A1-564408 is shown, presented by a nipper unit Watteende (also called fiber tuft) combed out by a below the nipper unit rotatably mounted combing segment of a circular comb. In this process, in particular the short fibers not clamped by the nipper unit are combed out of the combing segment from the tuft. In addition, other components, such as dirt, nits and shell parts, combed out during this combing process. The circular comb is arranged within a suction duct which communicates with a vacuum source via a suction channel. A portion of the combed material is removed by the action of the applied negative pressure directly after combing by the suction through the suction channel to a collection point.

The remainder of the combed out portion, such as combed fibers, becomes trapped between the needles or trims of the worsted. In order to ensure a uniform combing effect for the subsequent combing cycle, it is necessary to clean the combing segment before the beginning of the next combing cycle. During this cleaning process, the components fixed between the needles or teeth of the combing segment are to be removed by a cleaning element. This is done by a below the circular comb rotatably mounted cleaning roller, which is provided on its circumference with bristles, which engage in sections during their rotational movement between the clothing of the combing segment. In this case, the fixed components are released from the clothing and fed through the, prevailing by the applied negative pressure air flow to the suction channel. The direction of rotation of the brush roller is opposite to the direction of rotation of the Round comb, whereby the directions of movement of the combing segment and the cleaning bristles are rectified in the contact region between the cleaning roller and the circular comb. The cleaning effect is achieved by the different peripheral speeds between the circular comb and the cleaning roller. That is, the bristles of the cleaning roller have a higher peripheral speed than the set of the circular comb, whereby the dissolution of the fixed components takes place. In practice, the cleaning roller, also called brush roller, provided with its own electric motor drive, which can be varied to change the cleaning effect in its speed.

In general, this possibility of variation in the rotational speed of the brush roller is sufficient to influence the cleaning effect. An exact and individual adaptation to different conditions, such as the short fiber content, the degree of contamination of the material, the staple length, as well as the execution of Kämmsegmentes and the percentage Kämmlingsanteil is not possible with the known devices.

The invention is therefore based on the object to propose a cleaning roller for cleaning a combing segment of a circular comb, which is specially designed according to the circumstances mentioned above part to ultimately increase the cleaning effect, or to improve.

To solve this problem it is therefore proposed that the cleaning roller is provided on its circumference proportionally with cleaning elements whose geometric arrangement and / or geometric design and / or material is different from the other cleaning elements. This embodiment allows the action on the material to be removed to be staggered by the differently configured cleaning elements within a cleaning cycle. This means that, depending on the design, it may be possible to apply the material in the combing segment or in the clothing of the circular comb in increments. In this case, the more rigid (eg harder) cleaning elements can serve for releasing the fixed components, while the softer cleaning elements for discharging these Serve ingredients from the range of clothing. In order to achieve the effect of different cleaning effect, there are several ways to make a part of the cleaning elements different than the rest. On the one hand, they can be geometrically arranged differently or executed or consist of a different material. Both the geometric arrangement and design, as well as the choice of material has an influence on the bending strength of the cleaning elements, in particular, if it is, as further proposed, are projecting bristles, which are arranged on the circumference of a brush roller.

Preferably, these bristles are combined into bristle tufts, which are mounted with respect to the axis of rotation of the bristle roller axially parallel or helically on the circumference of the bristle roller in a plurality of spaced-apart rows. In order to achieve a varying cleaning effect with the rows of bristle tufts, it is proposed that the distance between at least two rows of bristle tufts is greater or smaller than the distance between the remaining rows.

Furthermore, it is proposed that a portion of the bristles have a higher or lower flexural strength than the other bristles. As already described, this different bending strength can be achieved by the choice of corresponding geometric dimensions, by the external shape or by appropriate choice of material.

In this case, an embodiment is conceivable, wherein the bristles are combined with the higher or lower bending strength in bristle tufts. In order to achieve the stepwise varying cleaning effect described here, it is proposed that, seen in the direction of rotation of the cleaning roller, the bristles of the respectively following bristle tufts have a different bending rigidity. In each case, for example, between two successive bristle tufts with increased cleaning action, a bristle bundle with softer bristles can follow, which exert a somewhat less aggressive cleaning action.

To achieve the different cleaning effects already described, it is further proposed that the bristle roller be proportionately equipped with metallic and plastic, fiber composite or natural bristles.

In this case, the metallic and the plastic, fiber composite or natural bristles can be summarized to bristle tufts, which are arranged distributed over the circumference of the brush roller.

It is also an embodiment conceivable, within the bristle tufts proportionate metallic and plastic, fiber composite or natural bristles are provided.

To vary the cleaning intensity or cleaning effect, the bristles can have different lengths. In this case, individual bristle tufts can be formed with bristles of different lengths.

In order, in particular, to vary the region of the bristles which comes into direct contact with the material to be removed, it is proposed that a portion of the bristles, seen in their longitudinal direction, is provided with a reduced cross-section over a region of the free end.

It is also possible that a part of the bristles has a different cross-section over their entire length than the other bristles. It is also conceivable to install within a tuft bristles with different cross-section.

In particular, due to the contaminants located in the fiber material to be combed, it comes to the wear of Kämmgarnur. In some cases, the edges of the clothing teeth are rounded or otherwise closed. In practice, therefore, after a certain period of operation, the circular combs are removed and their sets are reground on a stationary special grinding device.

To avoid this premature removal for repair of the circular comb set, or postpone, it is therefore proposed that the brush roller with Bristles is provided, which is provided at least in the region of their free ends with abrasive and / or polishing agent additives.

Preferably, the bristles are made of plastic.

Furthermore, it is proposed that the abrasives are abrasive grains, diamond grains or silicon carbide.

The abrasives may be embedded in the plastic bristles with a matrix structure or fixed from the outside onto the plastic bristle with adhesive or binder.

Fig. 1

eine schematische Seitenansicht der Kämmvorrichtung einer Kämmmaschine bekannter Ausführung

Fig. 2

eine Ansicht einer erfindungsgemäss ausgeführten Bürstenwalze

Fig. 3

eine Seitenansicht nach Fig. 2

Fig. 4

eine weitere Ausführungsform nach Fig. 2

Fig. 5

eine Teilansicht einer Bürstenwalze mit einer erfindungsgemässen Ausführung der Borsten

Fig. 6

ein weiteres Ausführungsbeispiel nach Fig. 5

Fig. 7

ein weiteres Ausführungsbeispiel der Anordnung von Borstenbüscheln einer Bürstenwalze nach Fig. 2

Fig. 7a

ein Ausführungsbeispiel nach Fig. 7

Fig. 8

eine Teilansicht einer Bürstenwalze mit einer erfindungsgemässen Ausführung der Borsten

Fig. 9

ein weiteres Ausführungsbeispiel gemäss Fig. 5

Fig. 10

ein weiteres Ausführungsbeispiel gemäss Fig. 5

Fig. 10a

eine Schnittdarstellung B-B nach Fig. 10

Fig. 10b

eine Schnittdarstellung A-A nach Fig. 10

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

Fig. 1

a schematic side view of the combing a combing machine of known design

Fig. 2

a view of an inventively designed brush roller

Fig. 3

a side view of FIG. 2

Fig. 4

a further embodiment of FIG. 2

Fig. 5

a partial view of a brush roller with an inventive embodiment of the bristles

Fig. 6

a further embodiment of FIG. 5

Fig. 7

a further embodiment of the arrangement of bristle tufts of a brush roller of Fig. 2nd

Fig. 7a

an embodiment of FIG. 7

Fig. 8

a partial view of a brush roller with an inventive embodiment of the bristles

Fig. 9

a further embodiment according to FIG. 5

Fig. 10

a further embodiment according to FIG. 5

Fig. 10a

a sectional view BB of FIG. 10

Fig. 10b

a sectional view AA of FIG. 10th

Fig. 1 shows schematically a side view of a combing unit of a combing machine. In practice, eight such combing units are arranged side by side. The combing unit consists of a nipper unit (in short: pliers), which perform a reciprocating motion on the wings 4, 5. The rockers 4 (only one shown) are rotatably mounted on a circular comb axis 12 and the pliers 1. The rocker 5, which is rotatably mounted on the pliers 1, is rotatably connected to a driven pliers shaft 6. A feed cylinder 2, which is rotatably mounted within the forceps 1, a cotton wool W is supplied. The cotton wool W is unwound from a cotton roll, not shown, which rests on also not shown winding rollers for the rolling process.

In the position shown in Fig. 1, the forceps 1 is open and is in a forward position in which the protruding from the forceps end FB (tuft called) is attached to the end of an already formed fiber fleece V and soldered to it. The nonwoven fabric V is held by a Abreisszylinderpaar 3, which perform a marked with the arrows rotation and thus the nonwoven fabric V, and its end E moves in the transport direction T for the soldering and tearing. In a rear end position of the forceps 1, not shown, this is closed, wherein the outstanding from the forceps 1 tuft FB of a Kämmsegment, or is combed out of a set 9 of a rotatably mounted circular comb 8. The clothing 9, which, for example, in the publication DE-196 49 808 is shown closer, is located during the combing process in an upper position. As shown in subsequent figures (eg, Figure 8 and Figure 11), the garnish 9 is provided with garniture teeth 10 which engage in the tuft FB during the combing operation.

The circular comb 8, which is rotatably supported by the circular comb shaft 12 in the machine frame, is located within a substantially closed suction duct 13, which opens into a channel 15. The channel 15 is, as shown schematically, with a vacuum source 14 in Vermindung, by means of which the separated material is fed to a collection point 22 shown schematically.

In the separated good is short fibers, shell parts, us other impurities, which are combed out during combing by the garnish 9 of the tuft FB. A portion of the combed material is transferred by the applied negative pressure via the vacuum source 14 and the resulting air flow directly to the channel 15. The remaining part, in particular the combed fibers remains in the clothing 9, or sets between the clothing tangs 10 and is transported by the rotational movement of the circular comb 8 down to the position shown. In this case, the clothing 9 enters the area of action of a likewise rotatably mounted in the suction shaft 13 via a shaft 16 brush roller 17, which is provided on its circumference with distributed arranged bristle tufts 18. The bristle tufts 18 are fastened on a roller body 20. The brush roller 17 is driven by a drive motor, not shown, and has a higher speed than the rotational speed of the circular comb eighth

The brush roller 17 is positioned so that the ends of the outwardly projecting bristles of the bristle tufts 18 engage between the teeth 10 of the clothing 9 (see, for example, FIG. That is, during the rotation of the circular comb 8 come due to the higher speed of the brush roller 17, a plurality of bristle tufts 18 in engagement with the set 9. In this process, the in the clothing 9, or between their clothing teeth 10 still located combed components dissolved by the bristles of the bristle tufts 18, and removed and supplied to the bottom 15 under the action of the applied negative pressure to the channel 15 for disposal.

The material combed out by the clothing 9 may be very different, in part, in terms of quantity, nature and condition. For example, if the material provided for combing is honeydew, the removal of the tacky substance components between the teeth 10 of the clothing 9 requires a more aggressive cleaning action than is required with other materials. Also, the degree of cleaning required to keep the clothing 9 clean depends on the amount of material deposited between the clothing teeth 10. This means that it is also dependent on the percentage (combing) of the combed out material. The length of the combed fibers, which settle in the area of the clothing 9 during the combing process, likewise has an influence on the cleaning effect to be required by the brush roller 17.

In order to maintain an optimum combing effect through the circular comb 8, it is necessary for the combing assembly 9 to be completely cleaned via the brush roller 17 after each combing operation.

In order to optimize this cleaning process, or to adapt according to the material template and the Auskämmgrad, examples are shown below, as the brush roller 17 may be formed accordingly. In principle, solutions are proposed, wherein by appropriate arrangements of the bristle tufts, as well as by appropriate selection of materials and geometric shapes of the individual bristles changing cleaning effects on the clothing 9 of the circular comb 8 are exercised. It may be advantageous, for example, if a stiffer bristle with a higher flexural strength is used to release the fixed constituents, which follows, for example, a less stiff bristle with a lower flexural strength in order to remove the dissolved constituents from the region between the fitting teeth 10. For example, if only metallic bristles were used Although the fixed components are removed from the set 9, but an increased wear of the clothing would be caused by the relatively aggressive brushing.

In the example of Figure 2, an embodiment of a brush roller 17 is shown, wherein the bristle tufts 18 are arranged in individual rows R1, R2, R3 to Rz, which extend approximately parallel to the axis of rotation of the brush roller 17. In order to achieve the above-mentioned alternating cleaning effect, it is proposed here that the rows R1, R2, R3 are arranged at different distances a, c on the circumference of the roller body 20 of the brush roller 17. FIG. 3 shows a side view of the brush roller 17 according to FIG. 2, wherein it can be seen that further rows R9 to R12 of bristle tufts 18 are provided over the entire circumference of the roller body 20 of the brush roller 17, which have a different spacing b from the rest of the rows of tufts. d have. Also with this design creates a changing cleaning effect on the clothing 9 of the circular comb 8, in particular with regard to an increased speed of the brush roller 17 to the circular comb. 8

As shown in the further embodiment of Figure 4, the rows R1, R2, R3 can also be arranged helically on the roller body 20 of the brush roller 17. The distances a, c between the rows R1, R2, R3 of the bristle tufts 18 can also be designed differently, as in the exemplary embodiment of FIG. 2 and FIG. 3.

FIG. 5 shows a further example, wherein the bristles B1 and B2 have different lengths L1, L2 within a bristle tuft 18a. With this embodiment, it is possible within a bristle tufts 18a to exert different cleaning effects by the bristles B1, B2.

FIG. 6 shows a further embodiment of a bristle tuft 18b, wherein bristles of different materials are combined with one another. In this case, for example, the bristles B6 made of plastic, fiber composite or natural bristles be executed while the bristles B7, for example, made of a metallic material. In particular, the bristles B7 are used to dissolve stubborn soils, such as sticky fibers, while the softer bristles B7 are used to remove the remaining components and to remove the dissolved contaminants from the area of the clothing 9.

In the further example of FIG. 7, individual bristle tufts 18c, 18d, 18e arranged one behind the other are shown, with the individual tufts of bristles each being formed with bristles of different material. The bristle tufts 18c, which may for example be arranged in a row on the roll body 20 according to FIG. 1, are equipped, for example, with metallic bristles B7. The bristle tufts 18d may include plastic bristles or natural bristles B6. The further bristle tufts 18e can either also have metallic bristles B7 or else bristles of other materials with which an aggressive cleaning effect can likewise be achieved. It is also conceivable, as shown for example in the partial view according to FIG. 7a, that bristle tufts 18c, 18d are alternately arranged with different materials of bristles within a row R1 of bristle tufts.

FIG. 8 schematically shows a bristle tuft 18 whose bristles B3, B4 engage between the clothing tangs 10 of the clothing 9. In order to maintain the combing action of the clothing teeth 10, the bristles B3 are provided at their ends with abrasive bodies 24, which cause a lateral regrinding of the clothing teeth 10 when passing through the clothing 9. Depending on the impact of the bristles B3 on the clothing teeth 10 partially the head of the clothing teeth 10 is also sanded. The abrasive grains 24 may be embedded in plastic bristles according to a matrix structure or adhered to the bristles. Diamond grains or silicon carbide can be used as abrasive grains. In addition to the attachment of bristles B3 with abrasives as shown, bristles having a different cleaning effect can, of course, also be used here, as shown in the preceding and following examples.

FIG. 9 shows another possible embodiment of bristles B5 within a bristle tuft 18f, wherein the length f has a constant cross-section starting from the fastening region on the roll body 20, while the ends of the bristles B5 taper towards the end over the length e. As a result, the bristles B5 are made softer in their end regions and exert, for example, a different cleaning action than the bristles B6 of the bristle tufts 18g. Also with this design, a changing cleaning effect is achieved.

In Figure 10, an embodiment is shown, wherein within a bristle tufts 18 bristles B8, B9 are provided, which are provided with a different cross-section. These cross sections can be seen in particular in the sectional views of FIG. 10a and FIG. 10b. These are only examples of other possible cross-sectional shapes. Due to the formation of bristles with different cross sections, the bristles receive different bending strengths from one another, as a result of which different cleaning effects also occur on the material to be removed between the clothing teeth 10.

FIG. 11 shows a partial view of a brush roller 17 on which bristle tufts 18h, 18i, 18k are arranged on the roller body 20, the orientation of the bristle tufts being different with respect to the radial RA. The bristle tufts 18h and 18k are inclined at an angle α relative to the radial RA. In contrast, bristle tufts 18i are systematically aligned with radial RA. The ends of the bristles of the individual bristle tufts 18f, 18i, 18k project in each case up to an enveloping circle H. As a result - seen in the direction of rotation of the brush roller 17 - at least the ends of the front bristles B10 of the bristle tufts 18h, 18k when hitting a resistance on the enveloping circle H moves when retreating, causing these bristles penetrate further between the Garniturzähne 10 and thus enhance the cleaning effect. Even with this arrangement creates a changing cleaning effect, whereby the degree of purification of the clothing 9 can be increased.

There are still a variety of possible embodiments conceivable, the embodiments shown so far can also be combined. The goal is in any case to increase the cleaning effect of conventional brush rollers and to create a way to use an individually designed brush roller, which exerts on the basis of the existing conditions (fiber material, Auskämmhöhe, degree of contamination, etc.) an optimal cleaning effect.

Claims (19)

Device for cleaning a combing segment (9) of a circular comb of a combing machine with a cleaning roller (17) rotatably mounted at a parallel distance from the circular comb axis (12), which is provided on its circumference with cleaning elements (18) which at times during the rotational movement with the combing segment (18) 9) come into contact, characterized in that the cleaning roller (17) on its circumference proportionally with cleaning elements (18, 18a-18k, B, B1-B10) is provided, the geometric arrangement and / or geometric design and / or material opposite the other cleaning elements is different. Apparatus according to claim 1, characterized in that the cleaning roller is a brush roller (17) which is provided on its circumference with substantially radially projecting bristles (B1-B10). Apparatus according to claim 2, that the bristles (B) are combined to bristle tufts (18) with respect to the axis of rotation of the bristle roller (17) axially parallel or helically on the circumference of the bristle roller in a plurality, spaced (ad) rows ( R1-R12) are mounted. Apparatus according to claim 3, characterized in that the distance (ad) between at least two rows (R1-R12) of bristle tufts (18) is greater or smaller than the distance between the other rows. Device according to one of claims 2 to 4, characterized in that a proportion of the bristles (B, B1-B10) have a higher or lower bending strength than the other bristles. Apparatus according to claim 4, characterized in that the bristles (B, B1-B10) with the higher or lower bending strength in bristle tufts (18, 18a-18g) are summarized. Apparatus according to claim 6, characterized in that seen in the direction of rotation of the cleaning roller (17), the bristles (B6, B7) of each subsequent bristle tufts (18c-18e) have a different flexural strength. Apparatus according to claim 2 or 3, characterized in that the brush roller (17) is proportionately equipped with metallic (B7) and with plastic, fiber composite or natural bristles (B6). Apparatus according to claim 8, characterized in that in each case the metallic (B7) and the plastic, fiber composite or natural bristles (B6) to bristle tufts (18c-18e) are combined, which are arranged distributed over the circumference of the brush roller (17). Apparatus according to claim 9, characterized in that the brush roller (17) is provided with distributed on its circumference tufts, wherein at least a portion of the tufts (18b) metallic (B7) and plastic, fiber composite or natural bristles (B6). Apparatus according to claim 2 or 3, characterized in that the bristles (B1, B2) have different lengths (L1, L2). Apparatus according to claim 3, characterized in that the bristles within at least one bristle tufts (18a) partially have different lengths (L1, L2). Apparatus according to claim 2 or 3, characterized in that a portion of the bristles (B5), viewed in the longitudinal direction, over a region (e) of the free end is provided with a reduced cross-section. Apparatus according to claim 2 or 3, characterized in that a portion of the bristles (B8, B9) has a different cross-section than the other bristles. Apparatus according to claim 3, characterized in that the bristles (B8, B9) within at least one bristle tufts (18) partially have a different cross-section. Device according to one of claims 2 to 15, characterized in that the brush roller (17) is proportionally provided with bristles (B3), which are provided at least in the region of their free ends with abrasive and / or polishing agent additives (24). Apparatus according to claim 11, characterized in that the bristles (B3) are made of plastic. Apparatus according to claim 12, characterized in that the abrasive means (24) are abrasive grains, diamond grains or silicon carbide. Apparatus according to claim 12 or 13, characterized in that the abrasive means (24) in the plastic bristles (B3) are embedded with a matrix structure or are fixed from the outside to the plastic bristle with adhesive or binder.

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