CN113474499B

CN113474499B - Carding machine

Info

Publication number: CN113474499B
Application number: CN202080016338.XA
Authority: CN
Inventors: 克里斯托夫·莱德斯; 罗伯特·皮其尔; 亚历山大·霍恩; 迪特玛·弗洛克
Original assignee: Trutschler Group Europe
Current assignee: Trutschler Group Europe
Priority date: 2019-04-25
Filing date: 2020-02-28
Publication date: 2023-04-28
Anticipated expiration: 2040-02-28
Also published as: BR112021016205A8; EP3959363A1; WO2020216497A1; CN113474499A; DE102019110691A1; EP3959363B1; BR112021016205A2

Abstract

The invention relates to a carding machine (100) having a cylinder (4) and a revolving deck (17) having deck strips (20) surrounding a partial region of the circumference of the cylinder (4), wherein at least one deck strip (20) is designed to transmit current operating data or electrical contacts to a control device of the carding machine (100), wherein the at least one deck strip (20) is designed to cooperate with at least one contact element (22), wherein the contact element (22) is designed to transmit electrical contacts or data to the control device of the carding machine (100), wherein the at least one contact element (22) is arranged in the region of a flexible arc (27). The invention is characterized in that the at least one contact element (22) has at least one contact arc (23) which is designed to compensate for a change in the distance between the cover strip (20) and the cylinder (4). The invention further relates to a contact element.

Description

Carding machine

Technical Field

The invention relates to a carding machine having a cylinder and a revolving deck having deck strips surrounding a partial region of the circumference of the cylinder, wherein at least one deck strip is designed to transmit current operating data or to be in electrical contact with a control device of the carding machine, wherein the at least one deck strip is designed to cooperate with at least one contact element, wherein the contact element is designed to transmit electrical contact or data to the control device of the carding machine, wherein the at least one contact element is arranged in the region of a flexible curve. The invention also relates to a contact element.

Background

In cleaning or carding fibrous materials, such as cotton and/or chemical fibers, rotating rollers equipped with clothing are often placed opposite stationary or surrounding cleaning or carding elements. In order to achieve a good cleaning or carding effect, these elements must be placed as close as possible to the clothing of the rotating roller. The adjustment is carried out in a cold state and while the roll is stationary. The effective distance between the card clothing tips and the card element opposite the card clothing is called the card gap. The carding nip is decisive for the carding quality. The size (width) of the carding nip is an important machine parameter that affects not only the fibre processing technology but also the operating characteristics of the machine. The carding nip is set as narrow as possible without the risk of the working element "bumping". To ensure uniform processing of the fibers, the gap must be as equal as possible across the working width of the machine. The card gap is influenced, on the one hand, in particular by the machine adjustment and, on the other hand, by the state of the clothing. The most important carding gap of the rotary flat card is located in the main carding zone, i.e. between the cylinder and the rotary flat card assembly. At least one, typically two, clothing adjacent to the working distance are in motion. In order to increase the throughput of the carding machine, attempts have been made to choose the operating speed or the operating speed of the movable element as high as the fibre processing technology allows. The working distance varies depending on the operating conditions, because the components of the carding machine are unevenly thermally expanded. The distance between the cylinder and the cover plate, the doffer, the stationary cover plate and the separating point with the tool is thus reduced. In extreme cases, the predetermined gap between the active surfaces can be completely exhausted by thermal expansion, so that the relatively moving components collide. The result is greater damage to the associated high-efficiency carding machine. However, the heat generated in the working area of the carding machine can in particular lead to different thermal expansions when the temperature difference between the components is too great. In order to reduce or avoid the risk of collisions, in practice the card gap between the clothing opposing one another is set relatively wide, i.e. a certain safety distance is present. However, large carding gaps lead to undesirable formation of lumps in the card web. In contrast, an optimal, in particular constantly narrow, dimension is desirable, whereby the number of lumps in the card strip is significantly reduced.

Different measuring methods for determining the carding nip are known, which have also been carried out in practice. Although there are various proposals for adjusting the carding nip in continuous operation, these proposals have not been implemented in the mass production of carding machines.

Furthermore, it is known that data concerning the operating state of the carding machine are transmitted from the circumferential clothing strip via the contact element or wirelessly to the control device of the carding machine.

In EP 3354774A1, a carding gap adjustment is described, in which the flexible curve is adjustable in sections. Said document also discloses the adjustment of the carding gap on the deckboard. Both methods can be applied in the continuous operation of the carding machine. The cover strip is designed to transmit data to the control device, wherein a contact element is fixedly arranged in the flexible arc element, which contact element interacts with a pin of the cover strip.

The disadvantage is that the adjustment of the carding nip is only possible within a small adjustment range. With the described arrangement of the contact elements in the flexible arc, it is not possible to adjust the carding nip in the range of a few millimeters, since the contact between the cover strip and the contact elements can be interrupted by a large adjustment path. It is also costly to retrofit existing carding machines with the system.

Disclosure of Invention

The object of the invention is to provide a carding machine in which the carding gap can be adjusted to an increased extent and in which useful data or electrical contacts can be transmitted from the cover strip to the control device. It is also an object of the present invention to provide a contact element which can be fitted to existing carding machines.

The invention relates to a carding machine having a cylinder and a revolving deck having deck strips surrounding a partial region of the circumference of the cylinder, wherein at least one deck strip is designed to transmit current operating data or to be in electrical contact with a control device of the carding machine, wherein the at least one deck strip is designed on at least one end side to cooperate with at least one contact element, wherein the contact element is designed to conduct electrical contact or data to the control device of the carding machine, wherein the at least one contact element is arranged in the region of a flexible arc.

The invention includes the technical teaching that the at least one contact element has at least one contact arc which is designed to compensate for the distance change between the cover strip and the cylinder. The contact element can be arranged in a fixed position and fastened to the flexible curve. The contact arc is designed to compensate for the distance change between the cover strip and the cylinder, whereby a change in the carding gap in the range of a few millimeters can be determined, which is not possible according to the prior art. The contact elements can be mounted afterwards to the carding machine with sufficient accuracy, for example, in order to transmit data from the cover strip to the control device. The cover strip may be equipped with electronic components and may be replaced with a conventional cover strip, for example for the first calibration of the flexible arc. Variations in the combing gap in the order of a few millimeters can also be used to automatically calibrate the combing gap with sufficient reliability and approach slowly at intervals during the first zero adjustment.

For this purpose, the at least one contact limb is preferably arranged spring-elastically or elastically on the contact element. The spring-elastic or elastic arrangement can be realized by means of spring elements or elastic rubber elements or plastic elements, for example made of foam rubber.

Preferably, one or more contact segments are provided on or in the sliding strip.

The plurality of contact segments are arranged concentrically to the cylinder at a distance from one another on the flexible arc-shaped element, whereby the position of the contact transmission between the clothing of the cover strip and the clothing of the cylinder can be precisely determined. In this case, a plurality of contact segments can be arranged on the contact element.

In a preferred embodiment, the contact arc is formed in one piece or has a rail or at least one spring element. In a one-piece embodiment of the contact limb, the contact limb can be made of an elastic base material, which is coated or connected by means of a conductive layer.

In a multipart embodiment, the contact limb has at least one spring element and at least one rail. The rail cooperates with the electrically conductive connection of the sliding element, pin or cover strip, wherein the sliding element, pin or electrically conductive connection with the contact slides through or on the rail. The spring element is designed to press the rail against the sliding element or pin with a prestressing force, so that contact for transmitting data or electrical contact is always ensured.

Advantageously, the at least one spring element is arranged with a first end on the contact element and a contact arc is arranged at a second end. The contact element receives the one or more spring elements, which may be made of an electrically insulating material, between the support and the clamping element.

The plurality of contact elements are arranged fixedly on the flexible curve, whereby a simple and inexpensive production from plastic is achieved, which can be produced more easily than one-piece contact elements which extend over an angle of approximately 90 ° to 120 °.

The contact element preferably has means for protecting the rail and the spring element, which can be embodied, for example, as a circumferential arc. The rail and the spring element may be damaged during cleaning and maintenance operations. The arc section can also be designed to limit the spring path or to protect the spring element from overload. The sliding element or pin can slide on the arc according to a predetermined adjustment range, so that the spring element is prevented from being further depressed or tensioned.

Preferably, at least one of the cover strips has electronic components for detecting the operating data and for transmitting the same to the control device of the carding machine. The electronic component is adapted to transmit the operating data to the control device of the carding machine wirelessly or on a contact basis. Preferably, the electronic components are arranged in the cavities of the cover strip, so that the cover strip is mass-producible and can be replaced with conventional cover strips with little effort. The integration of the electronic components into the hollow space of the cover strip protects the electronic components from contamination.

The clothing of the cylinder, together with the clothing of the cylinder and the clothing of the clothing strip, can be arranged in an electrically conductive but electrically insulating manner inside the carding machine, wherein a voltage can be applied to the two components, whereby an electrical contact is produced when the clothing is contacted or at very narrow distances, which electrical contact is detected and evaluated by the control device for carding gap adjustment. Thus, automatic setting of the card gap in the stationary state of the card and in continuous operation is possible.

The contact element according to the invention for use on a carding machine has at least one contact arc which is designed to interact with a sliding element or a pin of a cover strip and to compensate for a change in the distance between the cover strip and the cylinder. The contact elements can be fastened to the flexible curve of the carding machine in sections, so that a plurality of contact elements cover an angular area concentric to the cylinder and transmit data from the electronic components of the clothing strip or the electrical contact between the clothing of the clothing strip and the clothing of the cylinder to the control device of the carding machine. The contact element according to the invention makes it possible to compensate for distance variations between the cover strip and the cylinder in the millimetre range. The contact element is at the same time suitable for subsequent assembly to the carding machine, in order to achieve a first calibration of the flexible curve or of the carding gap, for example with a replaceable measuring card flat.

Drawings

Together with the description of the preferred embodiments of the invention, further measures for improving the invention are presented in more detail below with the aid of the accompanying drawings. In the figure:

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

fig. 2 shows a perspective view of a flexible arc-shaped element with a sliding strip and a contact section according to the invention;

fig. 3a shows a first view of a contact section;

fig. 3b shows an exploded view of the contact section;

FIG. 4 shows an enlarged detail view of a pin with a cover slat;

fig. 5a shows a further embodiment of the contact section from the front;

fig. 5b shows a further embodiment of the contact section from the rear;

fig. 6a shows a further embodiment according to the invention with a contact element integrated in the sliding strip;

fig. 6b shows a further embodiment according to the invention with a contact element integrated in the sliding strip.

Detailed Description

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

rollers

3a, 3b, 3c to a cylinder 4 or drum. On cylinder 4, the fibers of the loose fibers are parallelized and cleaned by means of stationary carding elements 13 and a circumferential cover strip 20 arranged on revolving cover system 17. The resulting web is then transported via a doffer 5, a stripping roller 6 and a plurality of squeeze rollers 7, 8 to a web guiding element 9 which converts the web into fiber strands using a bell mouth 10, which are transported via draw rolls 11, 12 to a downstream processing machine or a sliver can 15. Adjustment of the cover strip 20 relative to the cylinder 4 (carding gap) takes place by means of flexible curved elements or sliding strips 18, not shown here, which may have elements oriented wedge-shaped relative to one another.

The contact element 22 according to the invention is a component of the overall concept, with which the concentricity of the flexible arc 27 or the sliding strip 18 with the cylinder 4 and/or the distance of the cover strip 20 from the cylinder 4 (carding gap) can be automatically adjusted. Depending on the construction of the carding machine 100, the flexible arc 27 can have a sliding bar 18 which remains constant in cross section, on which the cover bar 20 slides along its cover travel. Alternatively, the sliding bar 18 may also comprise two wedge-shaped sliding bars 18a, 18b, which are arranged opposite one another, wherein the upper sliding bar 18a is arranged movably on the lower sliding bar 18b, so that the outer radius of the sliding bar 18 changes with the movement. In both variants, the sliding strip 18 is arranged and fastened on the flexible arc 27. For this purpose, the flexible arc 27 can have an upwardly open recess into which the lower sliding strip 18b can be integrated. The lower sliding strip 18b can be constructed in one piece with the flexible curve 27. Alternatively, the sliding strips may also be arranged adjustably directly or indirectly on the side plates, for example as flexible arches with a coated surface. Finally, this involves an adjustable guide rail for a revolving cover plate which is guided concentrically to the cylinder 4 with a defined carding gap over part of the circumference of the cylinder 4.

The conductive clothing together with the associated flat strip 20 is a general concept of an automatic carding machine gap control, which is arranged in an electrically insulated manner inside the carding machine 100. For this purpose, in the cover strip 20 of the revolving cover system 17, the clothing 20 is arranged in an electrically conductive base, as described in DE 102017101863. The cover strip 20 is guided on the sliding strip 18 in an electrically insulated manner, wherein the electrical contacts for the contact and temperature control device T-CON described in DE 102006002812 are guided and transferred into the base via the clothing and into the contact and temperature control device T-CON via the external sliding element.

Fig. 2 shows the principle of a sliding slat 18, which may comprise an upper movable wedge-shaped sliding slat 18a and a lower stationary wedge-shaped sliding slat 18b. The lower sliding strip 18b can be integrated in an upwardly open recess of the flexible arc 27 and is therefore not separately visible in the illustration. Independently of the embodiments described above, it is also possible to provide the sliding strip 18 in one piece on the flexible curve 27 or partially in the flexible curve 27. The lower stationary wedge-shaped sliding web 18b is arranged on or in the flexible arc element 27 or is fixed in position and is optionally formed in one piece with said flexible arc element. In the exemplary embodiment shown, a sliding strip 18 is used for the swivel cover system 17. Typically, the flexible curved elements 27 are connected directly or indirectly adjustably to side plates of the carding machine 100, not shown here, so that each carding machine 100 has at least one flexible curved element 27 of one piece or of several pieces on both sides of the cylinder 4. The radius of the flexible arc 27 and of the sliding web 18 arranged thereon should be set concentrically to the radius of the cylinder 4, since the cover web 20 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 cover strip 20 slides with its sliding elements or pins 20a on the upper side of the upper sliding strip 18a, which are guided and moved at a distance from one another by a drive belt, not shown here. The sliding element or pin 20a can interact with a contact arc 23 of the contact element 22, which can be arranged laterally, for example, on the sliding strip 18 or on the flexible arc 27. Alternatively, an electrically conductive connection between the cover strip 20 and the contact element 22 may also be possible. The electrical contact during calibration therefore takes place via the tip of the clothing of the cover strip 20, via the electrically conductive base of the cover strip 20, into the sliding element or pin 20a which is electrically connected to the base and into the contact arc 23. The embodiment shows a fixed arrangement of, for example, four contact elements 22 on the flexible arc 27, so that the position of the contact between the clothing of the cover slat 20 and the clothing of the cylinder 4 is very accurately positionable. 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 match the radius of the sliding strip 18 concentrically to the radius of the cylinder 4 and/or to adjust the base distance between the surface of the sliding strip 18 and the surface of the cylinder 4, the flexible arc-shaped element 27 has a plurality of adjustment spindles 19 which can be adjusted manually or motor-driven. In the described embodiment, six adjustment spindles 19 and two adjustment points are provided on the ends of the flexible arc, whereby the flexible arc 27 can be adjusted on each side of the carding machine 100. The adjustment of the upper sliding rail 18a on the lower sliding rail 18b takes place, as already mentioned, with a gear wheel, not shown here, which is driven by means of the drive device 21. The drive 21 can be configured as a motor-gear combination, for example as a stepper motor with an externally arranged sensor system or as a servomotor with an integrated sensor system. By adjusting or displacing the upper sliding web 18a on the lower sliding web 18b, the transmission of the movement takes place simultaneously by means of the wedge-like shape in such a way that a large path is passed over the circumference of the lower sliding web 18b, which path only causes a small change in radius. Because the contact element 22 is fixedly secured to the flexible arc 27, the greatest change in the radius of the sliding strip 18 also causes a change in the distance between the sliding element or pin 20a of the cover strip 20 and the flexible arc 27 and the cylinder 4. This distance change must therefore be compensated for in such a way that electrical contact between the pin 20a of the cover strip 20 and the contact arc 23 is ensured. For this purpose, the contact limb 23 is spring-elastically or elastically arranged on the contact element 22.

In fig. 3a and 3b, the contact element 22 is shown enlarged. The contact element 22 may comprise a support 22a and a clamping element 22c between which the contact arc 23 is clamped. The support 22a and the clamping element 22c can be connected to one another in a form-locking and/or force-locking manner. The arc 22b provided on the support 22a can limit the spring path of the contact arc 23 and at the same time protect the rail 23a and the spring element 23b from damage during cleaning and maintenance operations.

The contact arc 23 comprises a track 23a which is configured to be slightly convex and extends substantially concentrically to the radius of the cylinder 4. The rail 23a is made, for example, of a flat or round material, wherein a flat or curved upper surface interacts with the pin 20a of the cover strip 20. The pin 20a slides on the sliding strip 18 on the one hand, but protrudes slightly beyond the sliding strip 18, so that the contact arc 23 is pressed from below with the rail 23a onto the pin 20a and thus creates a mechanical and electrical connection. The track 23a of the contact arc 23 is arranged on the contact element 22 by means of a spring element 23 b. The spring element 23b is in the embodiment described made of an S-bent flat material which can be arranged and fastened on the underside or laterally of the rail 23a. The spring element 23b may, however, also consist of a spiral spring, a torsion spring or alternatively a spring element, provided that they compensate for the adjustment of the combing gap. In the exemplary embodiment described, spring element 23b also establishes an electrical connection between rail 23a and connection piece 24, by means of which an electrical contact between the clothing of cover strip 20 and the clothing of cylinder 4 can be established and transmitted to the control device. Alternatively, the spring element 23b can also be embodied as non-conductive or insulating, so that the contact between the rail 23a and the connection 24 or a further connection for controlling the card 100 can be converted into an electrical contact by means of separate wires. Thus, instead of the spring element 23b, alternative elastic materials (rubber, elastic plastic, etc.) can also be used, with which the distance change between the cover strip 20 and the cylinder 4 can be compensated for.

The connection 24 is in the embodiment described provided on the support 22a and cooperates with the first end directly or indirectly with the rail 23a or with one of the spring elements 23 b. The second end of the connector 24 may be configured such that the electrical lead connection is attachable.

In the embodiment of fig. 2, four contact elements 22 are provided on the flexible arc, which can transmit electrical signals to the control device in sections when contacting between the clothing of the cover strip 20 and the clothing of the cylinder 4. Limiting the arc length of each contact element 22 to an angular range of, for example, 10 ° to 30 ° enables inexpensive manufacture of the support 22a and the clamping element 22 c. Alternatively, it is also possible to use a one-piece contact element 22 with a continuous contact arc 23, in order to transmit data from the electrical components in the cover strip 20 to the control device, for example. If in the described variant the position of the contact between the clothing of the cover strip 20 and the clothing of the cylinder 4 is to be transmitted, it is necessary to additionally use at least one further sensor which furthermore determines the angular position of the cylinder 4 and the associated cover strip 20. The sectionalization of the contact arc 23 enables a sufficiently precise positioning of the contact between the clothing of the cover strip 20 and the clothing of the cylinder 4 in a simple manner. The segmentation can be performed in such a way that the maximum arc length of the contact arc 23 corresponds to the distance between the two pins 20a of the cover strip 20 or the width of the sliding element. The distance between the two contact segments 23 must here be greater than the distance between the two pins 20a or than the width of the sliding element, so that the distance between the contact segments 23 is not bridged by the cover strip 20. If only one pin 20a or only a limited portion of the sliding element is electrically conductive, the distance between the contact arcs 23 can be correspondingly reduced.

Of course, the number of spring elements 23b varies with the arc length of the rail 23a and the structural configuration of the rail 23a and its fastening to the contact element 22.

Fig. 4 again shows the interaction of the cover strip 20 with the contact element 22, wherein the sliding element or pin 20a slides along the rail 23a and the spring element 23b presses the rail 23a against the pin 20 a. In the illustrated embodiment, the support 22a is fastened to the flexible arc 27 by means of a clamping element 22 c. Both can be made of plastic and receive the contact arc 23 in an electrically insulating manner. A contact arc 23 is arranged between the support 22a and the clamping element 22c, wherein the lower region of the spring element 23b is arranged in a clamped manner between the support 22a and the clamping element 22 c. The arc 22b limits the spring path of the track 23a and at the same time protects the contact arc 23 from damage. In the illustrated embodiment, the spring element 23b rests on the bent leg of the connecting piece 24. The electrical conductors can be connected to the free legs of the connecting piece 24, so that a signal or an electrical contact can be transmitted by the sliding element or pin 20a of the cover strip 20 via the contact element 22 to the control device of the carding machine 100.

An alternative embodiment of the contact element 22 is shown enlarged in fig. 5a and 5 b. The contact element 22 comprises at least one contact arc 23. The contact arc 23 is in the illustrated embodiment formed in two parts and comprises a rail 23a, which is arranged on the contact element 22 by means of a spring element 23 b. However, the contact limb 23 itself can also be elastically or spring-elastically configured and be arranged directly or indirectly on the contact element 22. The contact element 22 may further comprise a support 22a and a clamping element 22c, between which the contact arc 23 is clamped. However, the contact arc 23 may also be arranged on the contact element 22. The support 22a and the clamping element 22c can be connected to one another in a form-locking and/or force-locking manner. The arc 22b provided on the support 22a can limit the spring path of the contact arc 23 and at the same time protect the rail 23a and the spring element 23b from damage during cleaning and maintenance operations. In the exemplary embodiment, the spring element 23b is formed as a resilient and heat-resistant plastic or rubber, for example made of foam rubber, and is arranged as a one-piece or multi-piece spring element 23b between the support 22a and the rail 23a. The spring element 23b can be glued to the support 22a and/or clamped to the support 22a by means of a clamping element 22 c. The rail 23a can likewise be connected to the spring element 23b, in this case to a resilient plastic or rubber, by means of an adhesive connection. Since the spring element 23b is only stressed, the manner of adhesive connection is sufficient for the application.

The contact arc 23 or its track 23a is configured to be slightly convex and extends substantially concentrically to the radius of the cylinder 4. The rail 23a is made, for example, of a flat or round material, wherein a flat or curved upper surface interacts with the pin 20a of the cover strip 20. The pin 20a slides on the sliding strip 18 on the one hand, but protrudes slightly beyond the sliding strip 18, so that the contact arc 23 is pressed from below with the rail 23a onto the pin 20a and thus creates a mechanical and electrical connection. The rail 23a of the contact arc 23 is arranged in the exemplary embodiment by means of at least one spring element 23b on the contact element 22, which is formed as a resilient and heat-resistant plastic or rubber. However, the contact limb can also be formed elastically or spring-elastically, for example as a conductive coating on an elastic plastic or rubber and thus be formed as one piece. Alternatively, the contact arc can also be formed as an electrically conductive cable having a flexible cross section. In the exemplary embodiment, the electrical connection between the rail 23a and the control device takes place via the connection piece 24, since the spring element 23b is embodied to be electrically insulating. For this purpose, electrical contact between the contact arc 23 or the rail 23a and the connection piece 24 or a further connection for controlling the carding machine 100 can be transmitted by means of separate wires.

The connection 24 is in the illustrated embodiment provided on the support 22a and cooperates with the first end directly or indirectly with the contact arc 23 or with the rail 23a. The second end of the connector 24 may be configured such that the electrical lead connection is attachable.

Even if the embodiment described here is arranged below the revolving cover 17 starting from a cylinder, an arrangement above the revolving cover 17, for example on a side plate, is likewise possible. The contact arc 23 then spring-elastically contacts the sliding element or pin 20a above said sliding element or pin.

Even if the embodiment described here is arranged below the revolving deck 17 starting from a cylinder, an arrangement above the revolving deck 17, for example on a side plate, may be likewise possible. The contact arc 23 then spring-elastically contacts the sliding element or pin 20a above said sliding element or pin 20 a.

In the further embodiment of fig. 6a and 6b, the contact element 22 is integrated into the sliding strip 18 or into the upper sliding strip 18 a. In fig. 6a, the grooves are machined in sections or sections into the sliding webs 18, 18a, into which the contact webs 23 are inserted. The contact arc 23 in turn has a spring element 23b, not shown, on which the rail 23a is mounted. The contact arc 23 or the rail 23a protrudes from the surface of the sliding strip 18, 18a without being loaded by the pin 20a of the cover strip 20.

The contact arc 23 forms a flat surface with the surface of the sliding strips 18, 18a when loaded by the pin 20a of the cover strip 20. The contact limb 23 can be formed in multiple parts from at least one spring element 23b and the rail 23a and fastened to one another, for example by means of adhesive bonding. However, the contact limb 23 can also be formed in one piece, for example as a spring element 23b made of plastic or rubber with an electrically conductive layer or as an elastically conductive cable.

The at least one spring element 23b can also be manufactured from a metal spring or from a plastic or rubber that is elastic and resistant to high temperatures. The spring element 23b can be arranged centrally in the sliding strip 18, 18a or towards the lateral edges (shown in dashed lines in fig. 6 a). A connection 24, not shown, can electrically connect the contact arc 23 or the track 23a to the control device. In fig. 6b, the sliding strips 18, 18a have a shoulder 25 at the lateral edge for receiving the contact element 22, which is formed here in two parts as a contact arc 23 with a spring element 23b and a rail 23a. In the exemplary embodiment, the spring element 23b is also formed as a resilient and heat-resistant plastic or rubber which is fastened in the shoulder 25 to the rail 23a, for example by means of an adhesive connection. The lateral arrangement or integration of the contact elements on the sliding strips 18, 18a has the advantage that the functional surface of the sliding strips 18, 18a, on which the pins of the cover strip slide, remains free. In a centered arrangement, depending on the operating conditions, cleaning of the sliding strips 18, 18a may be difficult, wherein assembly and operational reliability are advantageous.

The invention is not limited in its implementation to the preferred examples given above. Rather, many variants are conceivable which use the illustrated solution even in a in principle different embodiment. All the features and/or advantages deriving from the claims, the description or the drawings, including structural details or spatial arrangements, can be essential to the invention not only per se but also in different combinations.

Reference numerals:

100. carding machine

1. Feeding roller

2. Feeding plate

3a, 3b, 3c licker-in

4. Cylinder

5. Doffer

6. Stripping roller

7. Squeeze roll

8. Squeeze roll

9. Web guide element

10. Horn mouth

11. Traction roller

12. Traction roller

13. Carding element

15. Barrel strip

16. Side plate

17. Rotary cover plate

18. Sliding lath

18a upper sliding slat

18b lower sliding slat

19. Adjusting spindle

20. Cover slat

20a pin

21. Driving device

22. Contact element

22a support

22b arc section

22c clamping element

23. Contact arc section

23a track

23b spring element

24. Connecting piece

25. Shaft shoulder

27. Flexible arc-shaped piece

Claims

1. Carding machine (100) having a cylinder (4) and a revolving deck (17) having a deck strip (20) surrounding a partial region of the circumference of the cylinder, wherein at least one deck strip (20) is designed to transmit current operating data or electrical contact to a control device of the carding machine (100), wherein the at least one deck strip (20) is designed to cooperate with at least one contact element (22), wherein the contact element (22) is designed to conduct electrical contact or data to the control device of the carding machine (100), wherein the at least one contact element (22) is arranged in the region of a flexible arc (27), characterized in that the at least one contact element (22) has at least one contact arc (23) designed to compensate for a change in distance between the deck strip (20) and the cylinder (4), wherein the at least one contact arc (23) is arranged spring-elastically or elastically on the contact element (22), each contact element (23) has a track (23 a) and at least one spring element (23 b) arranged at the first end of the contact arc (23 b).

2. Carding machine according to claim 1, characterized in that a plurality of contact arcs (23) are arranged concentrically to the cylinder (4) at a distance from each other on the flexible arc (27).

3. Carding machine according to claim 1, characterized in that one or more contact arcs (23) are provided on or in the sliding bar (18; 18 a).

4. Carding machine according to claim 1, characterized in that a plurality of contact elements (22) are arranged fixedly in position on the flexible arc (27).

5. A card according to one of claims 1 to 3, characterized in that the contact element (22) has means for limiting the spring path of the one or more spring elements (23 b).

6. Carding machine according to claim 1, characterized in that the at least one spring element (23 b) is made of metal, elastic plastic or rubber.

7. Carding machine according to claim 1, characterized in that at least one of the cover strips (20) has electronic components for detecting operating data and transmitting to the control device of the carding machine.

8. Carding machine according to claim 1, characterized in that the clothing of the cylinder (4) and the clothing of the flat bar (20) are arranged inside the carding machine electrically conductive but electrically insulating, wherein a voltage can be applied to both components.