CN113994035A

CN113994035A - Carding machine with revolving flat

Info

Publication number: CN113994035A
Application number: CN202080041288.0A
Authority: CN
Inventors: 克里斯托夫·莱德斯; 罗伯特·皮其尔
Original assignee: Truetzschler GmbH and Co KG
Current assignee: Trutschler Group Europe
Priority date: 2019-06-06
Filing date: 2020-05-12
Publication date: 2022-01-28
Anticipated expiration: 2040-05-12
Also published as: CN113994035B; EP3980589A1; BR112021023653A8; EP3980589B1; WO2020244892A1; DE102019110670A1; BR112021023653A2

Abstract

The invention relates to a carding machine having a revolving flat (17), comprising at least two drawing means which are designed to receive a plurality of cover strips (20) in the end regions thereof and to guide the plurality of cover strips (20) at least along a partial circumference of a cylinder (4) of the carding machine, wherein the drawing means together with the cover strips (20) are guided around two deflection rollers (24, 25) each, the deflection rollers (24, 25) being arranged above a side guard (22) of the carding machine. The invention is characterized in that a bow (23) is arranged between each two deflecting rollers (24, 25), said bow being designed to receive further guide elements (26, 27, 28, 29, 35) for guiding the traction means, wherein the ends of the bow (23) are arranged on flanges (24b, 25b) on which the deflecting rollers (24, 25) are supported.

Description

Carding machine with revolving flat

Technical Field

The invention relates to a carding machine with revolving flat, comprising at least two drawing means which are designed to receive a plurality of flat bars in the end regions thereof and to guide the flat bars at least along a partial circumference of a cylinder of the carding machine, wherein the drawing means together with the flat bars are guided around two deflection rollers which are arranged above the side bars of the carding machine.

Background

DE 2604465 a1 discloses a revolving flat of a carding machine, in which flat bars are arranged on a revolving drive belt or chain and are guided over part of the circumference of a cylinder during the circulation. For this purpose, two guide rollers are provided at the deflection point of the belt drive. Between the two guide rollers, guide elements or sliding rails are arranged, which are fastened to the flanges or to the structural chain. The flanges or the structural chain in turn extend from the side panels to the upper sliding rail, whereby the structural space between the circumferential cover strips is only limitedly accessible. The adjustability of the drive belt or the chain is carried out by means of a spring balance by measuring the bearing force of the cover strip on the flexible arc or the sliding rail. This is very inaccurate and only indirectly deduces the tension of the drive belt or chain.

Disclosure of Invention

The aim of the invention is to improve a revolving flat for a carding machine, which enables easy accessibility of the flat bar and repeatable adjustability.

This object is achieved by the features of claim 1. Advantageous further developments of the invention are given in the dependent claims.

The carding machine according to the invention has a revolving flat comprising at least two drawing means which are designed to receive a plurality of flat bars in the end regions thereof and to guide the flat bars at least along a partial circumference of the cylinder of the carding machine, wherein the drawing means together with the flat bars are guided around two deflection rollers which are arranged above the side bars of the carding machine.

The invention is characterized in that a bow is arranged between each two deflecting rollers, which bow is designed to receive further guide elements for guiding the traction means, wherein the ends of the bow are arranged on flanges and the deflecting rollers are supported on said bow.

The pulling means can be designed as a belt or chain and can receive the cover strip in its end face region by means of pins, plastic elements or other connecting means. The pulling means guide the cover strips along their cover run at least along part of the circumference of the cylinder, so that the fibres between the clothing of the cover and the clothing of the cylinder are oriented in a very small gap and are cleaned. The drawing means are guided around two deflection rollers in each case, wherein the cover strip is guided out of contact with the fibers or the cylinder in the region of one deflection roller and cleaned by means of a suction device and a brush, and then guided back onto the cylinder before the second deflection roller region. At least one roller is configured to drive the traction means with a drive. Between the two deflection rollers, an arch is provided which is designed to receive further guide elements for guiding the drawing means, so that a free space is formed between the lower and upper return portions of the drawing means, which free space can be used for checking or removing the cover strip or for cleaning it. The free space is not blocked in the region of the side plates by fastening elements on which the bracket is arranged.

Preferably, the bow has a first end and a second end, which are arranged in the region of the deflecting rollers, wherein the bow spans at least a part of the distance between the deflecting rollers in an arc-shaped manner. The bridge, in which the bow is designed as an arc, enables a high stability and a large design freedom for the free space between the upper and lower return sections of the traction means.

In an advantageous embodiment, the first end of the bow is configured to be rotatable and the second end has a bearing which rests on the adjusting element. An easy assembly of the bow is achieved, which does not have to be assembled and adjusted in a complex manner on the side guard of the carding machine.

The second end of the bracket is pressed against the adjusting element by the tensioning of the pulling means, whereby the active fastening of the bracket to the second end can be dispensed with. The tensioning of the traction means ensures a permanent and precise abutment on the adjustment element.

The adjusting element is preferably designed as an eccentric, which interacts with the bearing of the bracket. The tensioning force on the traction means can be adjusted by the eccentric, since the bow more or less resists the tensioning of the traction means depending on the position of the eccentric.

The bow is designed to pivot with its first end with a defined force about a pivot point, whereby the tension acting on the traction means can be adjusted easily and precisely.

Preferably, a defined force is introduced at the second end of the bracket, wherein the pivot position of the bracket is fixed by the support of the eccentric, which is in contact with the bearing of the bracket. The defined force is generated, for example, by means of a spring, a pneumatic or hydraulic device or by means of a lever force.

The defined force is generated by means of a lever and a weight which can be mounted on the carding machine for adjusting the tensioning of the pulling means in the region of the second end of the bow, thereby achieving a simple and repeatable adjustability of the tensioning acting on the pulling means. The lever and the weight can simply be stored inside the carding machine or supplied to the fitter.

The bow preferably has at least two further deflection rollers for guiding the pulling means, whereby a low frictional force acts on the deflection of the pulling means. The use of two further deflection rollers per bow, i.e. a total of four deflection rollers, makes it possible to use deflection rollers with a small diameter, as a result of which the free space between the upper and lower return portion of the pulling means can be increased.

The additional guide elements on the bow reduce the tension on the pulling means due to the weight of the cover strip.

With the revolving cover according to the invention, a large free space can be created between the pulling means, with which the cover strip can be easily fitted or removed. The free space is also suitable for evaluating the condition of the cover strip and can be used for cleaning the revolving cover. At the same time, the simplest means can be used to reproducibly tension the traction means.

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. 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 view of a revolving cover plate according to the prior art;

FIG. 3 shows a view of a revolving cover plate according to the invention;

FIG. 4 shows a view of a drive belt for tensioning a revolving deck;

FIG. 4a shows an enlarged detail view of FIG. 4;

fig. 5 shows a view of the rear side of the revolving cover plate.

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 roll 1, a feed plate 2, via a number of taker-in

rolls

3a,3b,3c to a cylinder 4 or drum. On the cylinder 4, the fibers of the bulk fibers are parallelized and cleaned by means of a circulating carding element 20 which is fixed and arranged on the revolving flat 17. The resulting web is then conveyed via a doffer 5, a stripper roll 6 and a number 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 downstream processing equipment or cans 15.

Fig. 2 shows a revolving cover 17 according to the prior art. The revolving cover 17 comprises at least two drive belts 17a which are arranged on both sides of the cylinder 4 and interact with pins arranged thereon in the end region of the cover strip 20. This means that each cover strip 20 is fastened on both sides to a respective drive belt 17a by means of pins arranged on the end side, which are guided over the skirt 22 and arranged around it. In the subsequent figures, only one side of the card is shown, wherein the revolving flat 17 described here is guided on both sides of the card, as will be clear to the person skilled in the art. Each drive belt 17a is guided by at least two deflecting

rollers

24, 25, wherein the

deflecting rollers

24 and 25 are rotatably arranged on the

support elements

24a, 25 a. The

support elements

24a, 25a are in turn arranged on the side guard 22 of the carding machine 100. At least one of the

deflecting rollers

24 or 25 is coupled to a drive, by means of which the drive belt 17a with the revolving cover 20 is driven along its cover path. Between the

deflecting rollers

24, 25, further deflecting

rollers

26, 27 or guide devices can be provided for the belt 17 a. On both sides of the cylinder 4, a bracket 23 is arranged on each skirt 22, on which two

intermediate deflection rollers

26, 27 are arranged and rotatably mounted. Each bow 23 is likewise arranged and configured on the skirt 22 of the carding machine 100 in order to adjust the tension of the drive belt 17a by means of an adjusting device 23 a.

A suction device 30 is likewise arranged on the support element 25a, with which dirt and fiber residues are sucked away from the clothing of the card flat. In addition to the suction device 30, a cleaning device in the form of a rotating brush, not further indicated, is arranged on the bow 23. The cover strip 20 runs on the cylinder 4 between the

deflection rollers

24 and 25 via a sliding bar 18, which is arranged on the flexible arc 21. The flexible arc 21 is adjustably mounted on the skirt by means of the adjusting screw 19. The sliding bar 18 is adjustably arranged concentrically to the cylinder, spaced apart from the flexible arc 21. By adjusting the flexible arc 21 and the sliding strip 18, the carding gap between the cylinder 4 and the flat strip 20 can be adjusted. In the exemplary embodiment of fig. 2, the cover strip 20 is moved to the left in the region of the cylinder 4 or of the visible skirt 22 counter to the direction of rotation of the cylinder 4, wherein the cover strip 20 is guided here by the slide strip 18. After deflection about the deflecting roller 25, the cover strip 20 is moved to the right in the figure by the drive belt 17 a. The tensioning of the drive belt 17a is effected exclusively by means of a bow 23 which is adjustably arranged in a central position on the skirt 22. The contour of the bow 23 corresponds to the triangular contour of the rotating hanger-like bow, wherein the adjusting device 23a is arranged on the skirt 22 with fastening at the central corner (the suspension of the hanger-like bow) and at the two other corners rotatably supports the

deflection rollers

26 and 27. The arrangement and contour of the bracket 23 have the disadvantage that the tensioning of the drive belt is cost-effectively adjustable and that there is a lack of accessibility between the slats 20 in the pivot cover 17.

According to fig. 3, the revolving flat 17 according to the invention is guided between the deflecting

rollers

24 and 25 on each side of the carding machine 100 on at least two further deflecting

rollers

26, 27, which are arranged on a curved bow 23. The bow 23 tensions the upper run of the belt 17a, which is not in the region of the cylinder 4. The fastening of the bracket 23 takes place by means of two

flanges

24b, 25b, which are arranged on the

support elements

24a, 25 a. The bracket 23 is arranged so that it can be rotated with a first end on the first flange 25b about a rotation point 31. The second end of the bracket 23 rests loosely on the second flange 24b with a bearing 23b on an adjusting element which is arranged on the second flange 24b and is pressed against the bearing 23b by the tensioning of the drive belt 17 a. The bow 23 thus has the shape of a bridge which bridges the distance between the

flanges

24b, 25b in an arc-shaped manner. Between the bracket 23 and the skirt 22 above the cylinder 4, a free space is created which is accessible from both sides of the cylinder 4 and which can be used for cleaning operations or also for checking or removing the individual cover strip 20. Advantageously, the upper side of the bracket 23 is convex and the lower side of the bracket 23 is concave, in order to ensure sufficient stability on the one hand and to form as large a free space as possible between the bracket 23 and the skirt 22 above the cylinder 4 on the other hand.

In an advantageous embodiment, four

deflection rollers

26, 27, 28, 29 are provided on each bow 23, with which sufficient guidance for each drive belt 17a is ensured.

The exemplary embodiment of fig. 4 and 4a shows the arrangement of the bracket 23 between the flange 25b and the flange 24b without the drive belt 17a and without the cover strip 20. Via the pivot point 31, the bracket 23 is fastened rotatably with a first end to the flange 25 b. The second end of the bracket 23 rests with its bearing 23b on an adjusting element, which in the exemplary embodiment is designed as a rotatable eccentric 32. A pivot point 24c is provided on the second flange 24b, at which a double-armed lever 33 can be fastened for the adjustment process of the pivoting cover 17. The lever 33 has a short lever arm on one side of the pivot point 24c, which lever arm interacts with the second side of the bow 23. The longer lever arm of the lever 33 is arranged and configured on the side facing away from the pivot point 24c of the bracket 23 for receiving a weight 34. The weight 34 connected to the double-armed lever 33 generates a force on the second end of the bow 23 against the belt 17a, which is thus tensioned with a repeatable force. To maintain tension, the eccentric 32 is rotated and fixed to contact the bearing portion 23b of the bow 23. The drive belt 17a for the revolving flat 17 is thus repeatedly tensioned on each side of the carding machine 100. The lever 33 together with the weight 34 is removed after adjustment of the belt. Instead of the embodiment with lever 33 and weight 34, any other predefined force load on the second end of bow 23 is suitable for generating a repeatable tension on belt 17a, such as a spring device, or a pneumatic or hydraulic tensioning element.

Fig. 5 shows the guidance of the drive belt without the drive belt and without the cover strip from the rear side of the bracket 23. Turning

rollers

24 and 25 can be seen, at least one of which is coupled to the drive and which deflects the drive belt in the region of the cylinder and guides the drive belt. In the exemplary embodiment, four

deflection rollers

26, 27, 28, 29 are arranged on the bow 23. A further guide element 35 for the drive belt 17a is arranged on the bow 23 between the deflecting

rollers

26, 28 and the deflecting

rollers

27, 29. A further guide element 35 is arranged on the flange 24b, which guide element extends between the deflecting roller 24 and the deflecting roller 26 on the bow 23. The flange 25b also has a guide element 35 which extends from the deflecting roller 25 to the deflecting roller 27.

By means of the guide element 35, which in the exemplary embodiment is designed as a simple angle iron, the drive belt 17a can be guided with the cover strip 20 arranged thereon on a straight path between the deflection rollers, without the weight of the cover strip 20 causing additional tension to enter the drive belt 17 a.

An easy and reproducible adjustment of the drive belt tension in the revolving cover 17 is achieved by the device according to the invention, wherein a large free space is created inside the revolving cover by the design and arrangement of the bow 23, so that the cleaning operation or the replacement and inspection of the cover strip 20 is simplified.

The invention is not limited in its embodiments to the preferred examples given above. Instead, many variants are conceivable which use the variants of the illustrated solution even in fundamentally different types of construction. All the features and/or advantages which are derived from the claims, the description or the figures, including the structural details or the spatial arrangement, are not only essential for the invention itself but also in various combinations.

List of reference numerals:

100 carding machine

1 feed roller

2 feeding plate

3a,3b,3c licker-in

4 Cylinder

5 doffer

6 strip the roller

7 extrusion roll

8 extrusion roller

9 web guiding element

10 horn mouth

11 carry over pinch rolls

12 pulling roll

13 carding element

15 can

17 revolving cover plate

17a belt

18 slide bar

19 adjusting screw

20 cover plate strip

21 flexible arc member

22 side guard board

23 bow member

23a adjusting device

23b support part

24-turn roller

24a support element

24b flange

24c point of rotation

25 steering roller

25a support element

25b flange

26 turning roller

27 turning roller

28 turning roller

29 turning roller

30 suction device

31 point of rotation

32 eccentric part

33 Lever

34 heavy object

35 guide the element.

Claims

1. Carding machine with revolving flat (17) comprising at least two drawing means, the drawing means are designed to receive a plurality of cover strips (20) in the end regions thereof and to guide the cover strips at least along part of the circumference of a cylinder (4) of the carding machine, wherein the drawing means together with the cover strip (20) are guided around two deflection rollers (24, 25), the deflection rollers (24, 25) are arranged above the side guard (22) of the carding machine, it is characterized in that a bow (23) is arranged between each two deflecting rollers (24, 25), the bow is designed to receive other guide elements (26, 27, 28, 29, 35) for guiding the traction means, the ends of the bow (23) are arranged on flanges (24b, 25b) on which the deflecting rollers (24, 25) are supported.

2. A carding machine as in claim 1, characterised in that the bow (23) has a first and a second end, which are arranged in the region of the turning rollers (25, 26), wherein the bow (23) spans arcuately at least part of the distance between the turning rollers (24, 25).

3. A carding machine as claimed in claim 1 or 2, characterised in that the first end of the bow (23) is configured to be rotatable and the second end has a bearing (23b) which bears against the adjusting element.

4. A carding machine as in claim 3, characterised in that the second end of the bow (23) is pressed onto the adjusting element by the tensioning of the pulling means.

5. A carding machine as in claim 3 or 4, characterised in that the adjusting element is configured as an eccentric (32), which cooperates with the bearing portion (23b) of the bow (23).

6. A carding machine as in claim 1, characterised in that the bow (23) is configured for pivoting with its first end with a defined force about a pivot point (31) in order to adjust the tensioning of the pulling means.

7. A carding machine as in claim 6, characterised in that a defined force is introduced at the second end of the bow (23), wherein the pivoting position of the bow (23) is fixed by the support of an eccentric (32) which is in contact with the bearing (23b) of the bow (23).

8. A carding machine as in claim 6, characterised in that the defined force is generated by means of a lever (33) and a weight (34) which can be fitted on the carding machine for adjusting the tensioning of the pulling means in the region of the second end of the bow (23).

9. A carding machine as in any of the above claims, characterised in that the bow (23) has at least two further turning rollers (26, 27) for guiding the pulling means.

10. A carding machine as in claim 9, characterised in that two further turning rollers (28, 29) are provided between the turning rollers (26, 27) and/or that guide elements (35) are provided on the bow.