CN113474497A

CN113474497A - Device and method for adjusting at least one flexible arc-shaped piece concentric to rotatably supported cylinder with card clothing of carding machine

Info

Publication number: CN113474497A
Application number: CN202080015166.4A
Authority: CN
Inventors: 克里斯托夫·莱德斯
Original assignee: Truetzschler GmbH and Co KG
Current assignee: Trutschler Group Europe
Priority date: 2019-04-25
Filing date: 2020-03-10
Publication date: 2021-10-01
Anticipated expiration: 2040-03-10
Also published as: CN113474497B; WO2020216517A1; EP3959365A1; DE102019110662A1

Abstract

The invention relates to a device and a method for adjusting at least one flexible arc (27) concentric to a rotatably mounted clothing cylinder (4) of a carding machine, wherein at least one flexible arc (27) for guiding a plurality of circumferential cover strips (14) of a revolving cover strip system (17) is arranged on each side plate (16) on both sides of the cylinder (4) in an adjustable manner by means of a plurality of adjustment points, directly or indirectly, wherein means are provided by which at least one contact between the clothing (14a) of the cover strip (14) and the clothing (4a) of the cylinder (4) can be determined, so that the flexible arc (27) is adjustable concentric to the cylinder (4).

Description

Device and method for adjusting at least one flexible arc-shaped piece concentric to rotatably supported cylinder with card clothing of carding machine

Technical Field

The invention relates to a device and a method for adjusting at least one flexible arc piece concentric to a rotatably mounted clothing cylinder of a carding machine, wherein the at least one flexible arc piece is arranged on both sides of the cylinder at one side plate directly or indirectly by means of a plurality of adjusting points.

Background

The carding gap of the carding machine is determined by the distance of the clothing of the surrounding flat strip from the clothing of the cylinder. The cover strip runs by means of sliding elements or pins on in each case one sliding strip or a flexible arc, which thus forms a guide for the cover strip opposite the cylinder. The sliding strip is of one-piece or two-piece design. In the case of a two-part runner strip, the runner strip may have an upper wedge-shaped runner strip and a lower wedge-shaped runner strip. The lower wedge-shaped sliding strip can be formed in one piece with the flexible arc. Since the wedge-shaped sliding strips are oriented with their wedges relative to one another, the mutual displacement of the sliding strips results in a different height profile, which changes the distance of the upper sliding strip from the cylinder. The sliding strips are in turn arranged on flexible curved parts which are arranged directly or indirectly on both sides on the side plates of the carding machine. But the sliding slats can also be arranged directly adjustably on the side plates of the carding machine. By means of the adjustable spindle, the concentricity and distance of the flexible arc and thus the distance of the sliding bar from the cylinder can be adjusted. The sliding strips, which are directly or indirectly adjustably arranged on the side plates of the carding machine, are also included below in the concept of flexible arcs.

The adjustment of the flexible arc concentric to the cylinder is thus the first step in adjusting the constant carding nip. The adjustment of the flexible arc is usually carried out by means of a distance gauge in such a way that the distance is determined at the lateral edge region between the clothing of the cover strip and the clothing of the cylinder. The contour or the entire course of the guide rail on the cover plate circuit is therefore not fully understood, since the fitter always only has to adjust the region of the spindle individually. The result of the adjustment is therefore very dependent on the experience of the fitter.

Alternatively, a measuring flap is proposed according to DE 102014015480 a1, which is installed in place of one to three flap strips into a revolving flap system. The measuring cover is wound with the other cover strips and its distance from the clothing of the cylinder is detected electronically. The concentricity of the sliding strip with the cylinder can be displayed very clearly by means of a graphic analysis, so that the flexible arc and thus the sliding strip can be adjusted precisely to be concentric with the cylinder by adjusting the spindle. A disadvantage is the relatively high cost for the measuring cover.

The contact and temperature control device T-CON (DE 102006002812A 1) is provided with an automatic power cut-off in case of a possible collision between the cylinder and at least one component of the carding machine, for example a surrounding flat bar. For this purpose, opposing components that may collide with one another are electrically insulated and a voltage is applied to the two components. If there is contact between the components, a short circuit occurs, wherein in the machine control a digital filter selects and evaluates the number of contacts to prevent the card from being immediately de-energized. At present, the system is used to prevent clothing damage and machine damage, wherein the carding gap between the carding cylinder and the revolving flat can be adjusted again during continuous operation, especially when the temperature on the carding machine changes.

EP 2743385B 1 changes the above method, with the determined number of contacts also determining and evaluating the strength of each short circuit or the duration of the contact.

In both documents, it is disclosed that the existing carding gap is adjusted or changed after the flexible arc or sliding strip is adjusted if there is contact between the cylinder clothing and the flat clothing. But does not disclose the adjustment of the flexible arc or the sliding strip by means of the system.

Disclosure of Invention

The aim of the invention is to improve the adjustment of the concentricity of a flexible arc or a sliding strip and a cylinder on a carding machine.

The object is achieved by an apparatus and a method according to the preamble of claims 1 and 13 in combination with the features of the characterizing part. Advantageous further developments of the invention are given in the dependent claims.

The device according to the invention for adjusting at least one flexible arc concentric to a rotatably mounted clothing cylinder of a carding machine has at least one flexible arc on each side of the cylinder for guiding a plurality of circumferential cover strips of a revolving cover system, wherein the flexible arc is arranged directly or indirectly at each side plate in an adjustable manner by means of a plurality of adjustment points.

The invention is characterized in that means are present with which at least one contact between the clothing of the cover strip and the clothing of the cylinder can be determined, so that the flexible arc is adjustable concentrically to the cylinder.

By means of the contact between the clothing of the cover strip and the clothing of the cylinder, it is possible to adjust the individual flexible arc or the two flexible arc to be concentric to the cylinder simultaneously or in succession. In this case, a defined adjustment of the sliding strip in the region of the adjustment points of the flexible arc can establish a constant distance or contact between the clothing of the flat strip and the clothing of the cylinder. If the cover strip runs only on the upper side of the flexible arc, the latter is aligned concentrically to the cylinder by means of its adjustment point. The concentric adjustment of the flexible arc relative to the cylinder takes place via its adjustment points. The adjustment of the carding nip is carried out by subsequent adjustment of the adjustment points of the sliding slats or of the flexible arcs.

The device for determining the at least one contact between the clothing of the cover strip and the clothing of the cylinder is preferably designed as a resistance measuring device. The constant distance can be determined indirectly by the resistance measuring instrument by determining the resistance between the clothing. The resistance at the clothing is changed by adjusting the spindle.

Alternatively, the electrical contact measuring device can determine the contact between the clothing of the cover strip and the clothing of the cylinder, the clothing being electrically insulated from the cover strip and the clothing from the cylinder and a voltage being applied to the two components, and at least one short circuit being able to be established by contacting the two components. For this purpose, a contact and temperature control device T-CON is used, by means of which contact is detected and the position is assigned.

In order to adjust the flexible arc, in a first variant, a conventional flat strip can be used, the clothing of which rests flat against the flat strip over the entire working width. It is assumed here that the first contact does not necessarily have to be made in the edge region of the cylinder, but can also be made in the middle region of the cylinder. In this case the cylinder must be stopped, which in other subsequent variants is not necessarily the case, but may be justified on the basis of possible impacts and wear of the clothing. If, for example, a first contact is made in the middle region of the cylinder, the flexible arc can be adjusted again on both sides in the position of the adjustment spindle until the number of contacts increases over the cylinder width or the length of the cover strip and reaches the edge region or is determinable. The process can be repeated in the region of each adjustment spindle, so that the flexible arc is adjusted to be concentric with the cylinder by the cover plate stroke. The carding gap can then be adjusted by adjusting the sliding slats and readjusted, for example, as a function of temperature.

In a further variant, the at least one flat strip can be designed to receive a spacer at least in the lateral edge region, which spacer is designed to move the clothing partially away from the flat strip in a defined manner or at a defined distance. The adjustment point of the flexible arc concentric to the cylinder is adjustable by determining the contact between the clothing of the cover strip and the clothing of the cylinder. Since only a single contact between the clothing takes place here in the region of the adjustment points of the flexible arc, the method is suitable not only for measuring the electrical resistance but also for determining by electrical contact.

The adjusting points can be designed as manually or motor-driven adjustable adjusting spindles, which are arranged on the side plates. The lateral edge region is understood to be the region of the cover strip in which the sliding element or pin projects laterally from the contour of the cover strip. In the case of a flat strip length of 100cm to 130cm, the spacer is designed in such a way that the card clothing is moved away or spaced apart at a defined distance, for example 0.2mm to 0.5mm, at a lateral edge region, which is locally defined approximately 1cm to 5cm from the base region of the flat strip, and after this 1cm to 5cm again lies flat against the remaining part of the flat strip.

By contacting the cover strip and the teeth or tips of the clothing of the cylinder only in the edge region, the concentric distance or radius of the flexible arcs arranged on both sides from the cylinder can be adjusted in such a way that the cover strip can be oriented absolutely parallel to the cylinder or the cylinder axis. The clothing is therefore not subject to wear, since the laterally arranged teeth or tips are only briefly contacted for adjustment. After the adjustment, all the cover strips are therefore moved parallel to the cylinder, so that no lateral fibre flocks can be produced and the carding quality is identical across the width of the cylinder. After the adjustment of the flexible arc, the spacer is removed again or the integrated spacer is driven back to zero, so that the clothing rests flat again on the cover strip.

The card clothing of the flat strip is preferably detachably arranged at least in the lateral edge region of the flat strip. By means of the detachable arrangement, it is possible to use cover strips which are already present in the carding machine and are constructed in batches. For this purpose, the card clothing is advantageously fastened magnetically to the cover strip.

In an advantageous alternative embodiment, the clothing may be designed for fastening to the flat strip by means of segmented clamps or clips. With the alternative embodiment, the card clothing in the edge region of the cover strip can also be moved apart or spaced apart in a locally defined manner by a defined distance.

Alternatively to the two embodiments described, the flat strip can be configured as a reference flat strip in which the clothing is arranged at varying distances from the cylinder at the lateral edge regions, which flat strip projects out of the plane of the rest of the clothing arrangement.

The spacer can preferably be designed as a separate spacer which can be pushed in or inserted between the clothing and the cover strip. It is thus possible to use a flat bar in the carding machine, in which the feelers are pushed in a locally defined manner in the lateral edge regions.

In a further embodiment, the spacer can be integrated in the cover strip. For this purpose, pneumatic or hydraulic cushions can be used, which can be activated only manually or automatically for the adjustment process. This is, of course, also based on the defined removability of the card clothing in the lateral edge regions from the cover strip.

A further advantage is that the spacer can be designed as a pressure element or as a screw element which can move the clothing away from the cover strip for adjusting the adjustment point. The pressure element or the screw element can be integrated in the cover strip and limited to a defined adjustment dimension.

In an advantageous embodiment, two cover strips are used for adjusting the flexible arc, wherein a first cover strip is designed to receive a spacer at a lateral edge region and a second cover strip is designed to receive a spacer at a lateral edge region, which is opposite the edge region of the first cover strip. The flexible arc-shaped parts arranged on the side plates on both sides of the cylinder can be adjusted simultaneously.

A further advantage is that the carding machine has a control device which is designed to store and visually display the contact between the clothing of the flat bar and the clothing of the cylinder depending on the position of the contact. This can be done at any number of points along the sliding slats. The compilation of information for the adjustment of the carding machine is thus effected automatically for the fitter and the customer.

The method according to the invention for adjusting at least one flexible arc-shaped element concentric to a rotatably mounted clothing cylinder of a carding machine is used, wherein the at least one flexible arc-shaped element is arranged on both sides of the cylinder, in an adjustable manner by means of a plurality of adjustment points, directly or indirectly on one side plate each, and at least one flat strip is brought with its clothing into contact with the clothing of the cylinder, so that the at least one flexible arc-shaped element can be adjusted concentrically to the cylinder in the region of its adjustment points.

The contact is preferably determined by means of a resistance measurer. The electrical resistance between the cylinder and the clothing of the cover strip can be used by means of a resistance measuring device to adjust the concentric orientation of the flexible arc with respect to the cylinder. If the resistance changes, the distance between the members changes accordingly. The adjustment of the adjustment spindle is therefore carried out until the resistance is the same at all adjustment points.

Alternatively, the contact can be determined by means of an electrical short circuit, wherein at least the clothing of the cover strip is electrically insulated from the clothing of the cylinder and a voltage is applied to the two components. For this purpose, a contact and temperature control device T-CON is used, by means of which contact is detected and the position is assigned.

The card clothing is preferably removed at the edge region at a defined distance from the flat strip on at least one flat strip. The point of adjustment of the flexible arc concentric to the cylinder can thus be adjusted by means of a contact determined at the edge regions of the clothing of the cover strip and the clothing of the cylinder.

By contacting the cover strip and the teeth or tips of the clothing of the cylinder only in the edge region, the concentric distance or radius of the flexible arcs arranged on both sides from the cylinder can be adjusted in such a way that the cover strip can be oriented absolutely parallel to the cylinder or the cylinder axis. The clothing is therefore not subject to wear, since the laterally arranged teeth or tips are only briefly contacted for adjustment. After the adjustment, all the cover strips are therefore moved parallel to the cylinder, so that no lateral fibre flocks can be produced and the carding quality is identical across the width of the cylinder.

The determination of the contact in the course of the partial circumferential surface of the cylinder is preferably stored in the control device and displayed visually.

Drawings

The following together with the description of preferred embodiments of the invention will present further measures for improving the invention in more detail with the aid of the drawings. Even if the embodiments relate to a flat card, the components described here can also be part of a roller card.

In the figure:

FIG. 1 shows a schematic side view of a carding machine with a device according to the invention;

fig. 2 shows a perspective view of the sliding panel;

FIG. 3 shows a schematic view of a side panel along with a sliding slat and swing cover system;

FIG. 4 shows a schematic view of a cylinder with one of two modified cover strips;

fig. 5 shows another embodiment of fig. 4.

Detailed Description

Fig. 1 shows a carding machine 100 according to the prior art, in which loose fibres are guided via a shaft to a feed roller 1, a feed plate 2, via a plurality of taker-in

rollers

3a, 3b, 3c to a cylinder 4 or drum. On the cylinder 4, the fibers of the bulk fibers are made parallel and cleaned by means of a fixed carding element 20, a suction hood and a chopper and by means of a revolving carding element, which is arranged on the revolving flat system 17 and is designed as a flat bar 14. The resulting web is subsequently conveyed via a doffer 5, a stripper roller 6 and a plurality of press rolls 7, 8 to a web guiding element 9, which deforms the web into a sliver using a flare 10, which is transferred via drawing rolls 11, 12 to a downstream processing machine or sliver can 15. The adjustment of the cover strip 14 relative to the cylinder 4 (carding nip) takes place by means of flexible arcs or sliding strips 18, not shown here, which have elements aligned in a wedge-like manner relative to one another.

The following description relates to the adjustment of the concentricity of the flexible arc or sliding strip 18 and the cylinder 4. Depending on the configuration of the carding machine, the flexible arc can have a sliding bar 18 which remains constant in cross section and on which the flat bar 14 slides along its flat path. Alternatively, the sliding strip 18 can also comprise two wedge-shaped sliding

strips

18a, 18b which are arranged opposite one another, and wherein the upper sliding strip 18a is arranged displaceably on the lower sliding strip 18b, so that the outer radius of the sliding strip 18 changes with the displacement. In both variants, the sliding strip 18 is arranged and fastened on the flexible arc 27 or in an upwardly open recess of the flexible arc. The lower sliding strip 18b can be formed in one piece with the flexible arc 27. The cover strip 14 can also slide along the upper side of the coating of the flexible arc 27, depending on the design of the carding machine.

In a first embodiment, the determination of the concentricity of the flexible arcs is made by a resistance measuring instrument without applying a separate voltage to the member.

For the second exemplary embodiment, the clothing 14a with the associated cover strip 14 is electrically conductive, but is arranged electrically insulated inside the carding machine 100. For this purpose, in the cover strip 14 of the revolving cover system 17, the clothing 14a is arranged in an electrically conductive base. The cover strip 14 is guided in an electrically insulated manner on the sliding strip 18, wherein the electrical contacts for the contacting and temperature control device T-CON are guided and transferred via the card clothing 14a into the base and via external sliding elements or pins into the contacting and temperature control device T-CON. This is not necessary for the first embodiment.

Fig. 2 and 3 show the principle of the sliding strip 18, which may comprise a movable upper wedge-shaped sliding strip 18a and a stationary lower wedge-shaped sliding strip 18 b. Independently of the above-described embodiment, it is also possible to provide the flexible arc 27 with a one-piece sliding strip 18. The lower, stationary wedge-shaped sliding strip 18b is arranged in a stationary manner on or in the upwardly open recess of the flexible arc 27 and is therefore not visible. In the exemplary embodiment shown, a sliding bar 18 for a revolving cover system 17. Usually, the flexible arc-shaped elements 27 are directly or indirectly adjustably connected to the side plates 16 of the carding machine 100, so that each carding machine 100 has at least one-piece or multi-piece flexible arc-shaped element 27 on both sides of the cylinder 4. The lower sliding web 18b can be arranged on the flexible arc 27 in a stationary manner or integrally with it. The upper sliding bar 18a is arranged displaceably on the lower sliding bar 18b, wherein a gear 21a, which penetrates at least partially through the lower sliding bar 18b, displaces the upper sliding bar 18a over the circumferential surface. The radius of the flexible arc 27 and of the sliding strip 18 arranged thereon must be adjusted concentrically to the radius of the cylinder 4, since the cover strip 14 is guided over its cover travel counter to the direction of rotation of the cylinder 4 and should always have the same distance (carding gap) from the cylinder 4. The revolving cover 14 slides with its sliding elements or pins 14b, which are guided and moved at a distance from one another by means of a drive belt 24, on the upper side of the upper sliding rail 18 a. The sliding element or pin 14b can interact here with a contact segment 23 of a contact element 22, which can be arranged laterally on the sliding bar 18 or on the flexible arc 27, for example. Alternatively, the cover strip 14 can also be connected directly, for example by sliding contact, to the contact arc 23. The electrical contact during calibration therefore passes through the tip of the clothing 14a, through the electrically conductive base of the cover strip 14 into the pin 14b, which is electrically connected to the base, and into the contact arc 23. The exemplary embodiment shows an arrangement of, for example, four contact elements 22 on the sliding strip 8, so that the position of the contact between the clothing 14a of the cover strip 14 and the clothing 4a of the cylinder 4 can be positioned very precisely. The contact element 22 with its contact arc 23 is in turn electrically connected to the control device of the carding machine 100. In order to concentrically adapt the radius of the sliding strip 18 to the radius of the cylinder 4 and/or to adjust the base distance between the upper side of the sliding strip 18 and the cylinder 4, the flexible arc 27 has a plurality of adjustment spindles 19, which can be adjusted manually or by motor. In the embodiment shown, six adjusting spindles 19 and two further adjusting points are provided at the ends of the flexible arc 27, with which the flexible arc 27 can be adjusted on each side of the carding machine 100. The adjustment of the upper sliding strip 18a on the lower sliding strip 18b takes place, as already mentioned, by means of a gear wheel 21a which is driven by means of a drive 21. The drive 21 can be designed as a motor-actuator combination, for example as a stepping motor with an externally arranged sensor system or as a servomotor with an integrated sensor system. By adjusting or displacing the upper sliding strip 18a on the lower sliding strip 18b, the transmission of the movement is effected at the same time by means of a wedge in such a way that a large path is traversed on the circumference of the lower sliding strip 18b, which path causes only small changes in the radius.

Fig. 4 shows a view of the cover strip 14 and a part of the cylinder 4 in a line of sight from the can 15 to the open carding machine 100. The first flat bar 14 is assigned a spacer 26, which is inserted into the card clothing 14a or below its base on the side of the flat bar 14. For this purpose, the clothing 14a can be released from the cover strip 14 in the region of the sliding element or pin 14b on the cover strip 14. The clothing 14a can be fastened magnetically to the cover strip 14 in an advantageous manner. Alternatively, the fastening (clamping, clipping) of the clothing to the cover strip 14 can be segmented at least in the region of the pins on the two cover strips, so that the fastening is configured detachably at the edge region. Of course, it is also possible to prepare two prepared cover strips and to insert them into the revolving cover system 17 and to replace them again after the adjustment of the flexible arcs 27. In the first embodiment, the spacer 26 can be configured, for example, as a shim having defined dimensions, which is suitable, for example, in the case of a feeler gauge piece. The spacer 26 may have a thickness of, for example, 0.2 mm. In fig. 4, the clothing 14a is positioned with the value at its clothing 4a closer to the cylinder 4 on the left in the drawing, so that the tips of the

clothing

4a, 14a touch or almost touch at a unique position. On the right side, the clothing 14a of the cover strip 14 is fastened unchanged to it and therefore has a distance of 0.2mm from the clothing of the cylinder 4. On the left, an extremely precise contact is established in a targeted manner, the clothing 14a of the cover strip 14 approaching the clothing 4a of the contact cylinder 4 in the region of the adjusting spindle 19. The second flat strip, which is arranged directly next to the first flat strip on the revolving flat system 17, is provided on the right with a spacer 26 between the clothing 14a and the flat strip 14. Since the two cover strips are adjacent to one another, they are now positioned in the region of the first adjustment spindle 19. It is possible to apply the flat strip with its clothing on the clothing of the cylinder on one side of the card or to touch it. The adjusting spindle 19 must therefore be adjusted again on the side which does not touch the clothing. The presence or absence of contact may be determined using a resistance measuring instrument or a contact and temperature control device T-CON. If the two cover strips each have contact with the clothing 4a of the cylinder 4 on the left and on the right with their "deeper lying" clothing, it is assumed after removal of the two spacers 26 that the cover strip 14 is arranged absolutely parallel to the cylinder 4 and thus the flexible arcs 27 have the same distance from the cylinder axis on both sides of the carding machine. The cover strip 14, which is also provided with the spacer 26, is now moved to the other five adjustment spindles 19 and the process is repeated in each case. With which the flexible arc 27 can be adjusted precisely on each side of the card. The use of the resistance measuring instrument or the contact and temperature control device T-CON enables an objective determination of the contact between the clothing 14a of the clothing strip 14 and the clothing 4a of the cylinder to be made, which determination is therefore no longer based on the subjective experience of the fitter.

In the exemplary embodiment of fig. 5, the spacer 26 is designed as a pressure element which can be operated hydraulically or pneumatically. The pressure element is embedded in the base region of the cover strip 14 and can be moved out of the plane of the base region in such a way that the clothing 14a is moved away from the cover strip 14 by a defined distance. For this purpose, the pressure element can be manually or automatically actuatable.

Alternatively, at the same location, the bolts are shown as spacers 26, which may penetrate at least partially through the base region of the cover strip 14 and may be provided, for example, in the fastening for the pins 14. The card clothing 14a can likewise be removed from the cover strip 14 by screwing in the bolts by a defined amount. The screw can be prepared in such a way that it can be turned only a certain number of times in order to determine precisely the distance of the clothing from the flat bar. Instead of screws, bayonet or slot locks can also be provided, in which case a defined distance between the clothing 14a and the flat bar 14 can be achieved, for example, with a 30 ° rotation. Of course, the two cover strips can also be configured as reference cover strips and only be used for the orientation process of the flexible arcs. Thereafter, the reference flat bar is replaced again in the carding machine by a conventional flat bar.

The visual or graphical representation of the contour of the flexible arc 27 is achieved in that the cover strip 14, which is assigned the spacer 26, is driven by means of the cover drive over the entire arc of the cylinder 4 and establishes contact between the clothing at any number of points. The recording of the cover travel (contact of the arc via the cylinder) enables a graphic depiction of the guide rails (flexible arc and sliding strip) with reference to the cylinder surface to be realized by means of the machine control. The course of the pattern thus corresponds to the contour of the flexible arc or flexible arcs.

The method according to the invention and the associated device enable flexible arcs 27 arranged on the side plates 16 on both sides of the cylinder 4 to be adjusted in such a way that the cover strip 14 is displaced absolutely parallel to the cylinder 4 or to the cylinder axis.

The method described with reference to fig. 4 and 5 starts from two cover strips which, on opposite sides, approach each other only in the edge region of the cylinder as the distance between the clothing and the cover strip increases. The method can also be carried out with a single flat bar in that the flat bar 14 lying underneath is first moved away from the side of the flexible arc 27 of the carding machine in the region of the end face between the clothing 14a and the flat bar 14 by means of spacers 26 or spacer elements. After adjustment of the first flexible arc 27, the cover strip is rotated by 180 ° in the revolving cover system 17 and the second flexible arc 27 can be adjusted. The two methods for adjusting the flexible arc 27 have the advantage that one or both existing flat bars 14 of the carding machine can be used.

In an alternative embodiment, a single cover strip 14 can be used for simultaneous adjustment of the two flexible arcs 27, wherein the cover strip 14 has segmented clothing which is electrically insulated from one another. The division of the clothing is preferably carried out in the middle of the cover strip 14, so that separate electrical contacts can be established on both sides of the cover strip 14 between a part of the clothing and the edge region of the cylinder 4. On both end sides, spacers 26 or spacer elements are inserted between the flat bar 14 and the clothing 14a, so that both flexible arcs 27 are adjustable simultaneously.

With the method described above, the flexible arc 27 can be adjusted on the basis of the contact or resistance measurement established in a targeted manner between the clothing 4a of the cover strip 14 and the edge region of the cylinder clothing.

Alternatively, it is also possible to use a single cover strip 14, the clothing 14a of which rests flat against the cover strip 14 over the entire working width and is not underlaid in the edge region by the spacer 26, for adjusting the flexible arc 27. It is assumed here that the first contact does not necessarily have to be carried out in the edge region of the cylinder 4, but can also be carried out in the middle region of the cylinder 4. In said case, the cylinder 4 must be stopped, which in the previously described variant is not necessarily the case, but may be justified on the basis of possible impacts and wear of the clothing. If, for example, a first contact is made in the middle region of the cylinder 4, the flexible arc 27 can be adjusted again on both sides in the position of the adjustment spindle 19 until the number of contacts increases over the cylinder width or the length of the cover strip and reaches the edge region or is determinable. The process can be repeated in the region of each adjusting spindle 19, so that the flexible arc 27 is adjusted concentrically to the cylinder by the cover travel. The carding nip is then subsequently adjusted by adjusting the sliding slats 18 and readjusted, for example, according to the temperature.

The invention is not limited in its embodiments to the preferred examples given above. Rather, many variants are conceivable which use the illustrated solution even in fundamentally different embodiments. All features and/or advantages, including structural details or spatial arrangements, which are derived from the claims, the description or the drawings, can be essential to the invention both by themselves and in different combinations.

Reference numerals:

100 carding machine

1 feed roller

2 feeding plate

3a, 3b, 3c licker-in

4 Cylinder

4a card clothing

5 doffer

6 stripping roller

7 extrusion roll

8 extrusion roller

9 web guiding element

10 horn mouth

11 carry over pinch rolls

12 pulling roll

13 frame

14 cover strip

14a card clothing

14b pin

15 can

16 side plate

17 revolving cover plate system

18 sliding strip

18a upper sliding strip

18b lower sliding strip

19 adjusting spindle

20 fixed carding element

21 driver

21a gear

22 contact element

23 arc of contact

24 transmission belt

25 steering wheel

26-pitch holder

27 flexible arc member

T-CON contact and temperature control device

Claims

1. Device for adjusting at least one flexible arc (27) concentric to a rotatably mounted clothing cylinder (4) of a carding machine, wherein at least one flexible arc (27) for guiding a plurality of circumferential cover strips (14) of a revolving cover system (17) is arranged on each side panel (16) on both sides of the cylinder (4) in an adjustable manner by means of a plurality of adjustment points, in each case directly or indirectly, characterized in that means are present with which at least one contact between the clothing (14a) of the cover strip (14) and the clothing (4a) of the cylinder (4) can be determined, so that the flexible arc (27) is adjustable concentric to the cylinder (4).

2. The device according to claim 1, characterized in that the means for determining the at least one contact between the clothing (14a) of the clothing strip (14) and the clothing (4a) of the cylinder (4) are configured as a resistance measuring instrument.

3. The device according to claim 1, characterized in that the means for determining the at least one contact between the clothing (14a) of the flat bar (14) and the clothing (4a) of the cylinder (4) are configured as an electrical contact measuring device, wherein the clothing (14a) is electrically insulated from the flat bar (14) and the clothing (4a) is electrically insulated from the cylinder (4) and a voltage is applied to both components, and at least one short circuit can be established by contacting both components.

4. The device according to claim 1, characterized in that the at least one cover strip (14) is configured to receive a spacer (26) at least at the lateral edge region, which spacer is configured to move the card clothing (14a) away locally or in a defined manner from the cover strip (14) by a defined distance.

5. Device according to claim 1, characterized in that the card clothing (14a) of the cover strip (14) is detachably arranged at least at lateral edge regions of the cover strip (14).

6. Device according to claim 4, characterized in that the clothing (14a) is configured for fastening on the cover strip magnetically or by means of segmented clamps or clamps.

7. Device according to claim 2, characterized in that the spacer (26) is configured as a separate shim.

8. Device according to claim 2, characterized in that the spacer (26) is integrated in the cover strip (14).

9. The device according to claim 6, characterized in that the spacer is configured as a pressure element or a screw element which can move the card clothing (14a) away from the cover strip (14) for adjusting the adjustment point.

10. Device as claimed in one of the preceding claims, characterized in that the clothing strip (14) has a segmented clothing, wherein the clothing segments are arranged on the clothing strip in an electrically insulated manner from one another.

11. Device according to claim 1, characterized in that two cover strips are used for adjusting the flexible arc, wherein a first cover strip is designed to receive a spacer (26) at a lateral edge region and a second cover strip is designed to receive a spacer at a lateral edge region, which is opposite the edge region of the first cover strip.

12. Device as claimed in one of the foregoing claims, characterized in that the carding machine has a control device which is configured to store and visually display the contact between the clothing of the cover strip and the clothing of the cylinder depending on the position of the contact.

13. Method for adjusting at least one flexible arc (27) concentric to a rotatably mounted clothing cylinder (4) of a carding machine, wherein the at least one flexible arc (27) is arranged on both sides of the cylinder (4) in an adjustable manner by means of a plurality of adjustment points, directly or indirectly in each case at one side plate (16), characterized in that at least one cover strip (14) is brought with its clothing (14a) into contact with the clothing (4a) of the cylinder (4), so that the at least one flexible arc (27) is adjustable concentric to the cylinder (4) in the region of the adjustment points of the flexible arc.

14. Method according to claim 13, characterized in that at least one contact can be determined by means of a resistance measuring device.

15. Method according to claim 13, characterized in that at least one contact can be determined by means of an electrical short circuit, wherein at least the clothing of the cover strip is electrically insulated from the clothing of the cylinder and a voltage is applied to both components.

16. Method according to one of claims 13 to 15, characterized in that the determination of the contact in the course of a partial circumferential surface of the cylinder (4) is stored in a control device and can be displayed visually.