GB2379939A

GB2379939A - Mounting clothing on a card top bar of a carding machine

Info

Publication number: GB2379939A
Application number: GB0222065A
Authority: GB
Inventors: Gerd Pferdmenges
Original assignee: Truetzschler GmbH and Co KG
Current assignee: Truetzschler GmbH and Co KG
Priority date: 2001-09-21
Filing date: 2002-09-23
Publication date: 2003-03-26
Anticipated expiration: 2022-09-23
Also published as: FR2830023A1; ITMI20022006A1; FR2830023B1; GB0222065D0; GB2379939B; CN1448554A; CH695893A5; CN100359058C

Abstract

Card clothing 23 is mounted on a card top bar by means of a carrier 26 formed with one or more projections which is/are received in a recess or recesses 14i in a body of the bar. The projection(s) may be held in pace by screws 28.

Description

Device on a carding machine for cotton, synthetic fibres and the like, in which there is at least one card top bar having card top clothing The invention relates to a device on a carding machine for cotton, synthetic fibres and the like, in which there is at least one card top bar having card top clothing.

In a known device, the card top clothing is attached to the card top bar and lying opposite the clothing of a roller, for example the cylinder and the card top bar consists of a rear portion and a support body having a base surface. Attached to the base surface (clothing receiving portion) and extending in the longitudinal direction thereof is a clothing strip (flexible clothing). The clothing strip comprises a support element made of a plurality of textile layers, in which a large number of wire hooks (clothing tips) are mounted.

The clothing strip is attached over the longitudinal sides of the support body by means of two clips (cramps, clips). The clips with their one end surround the longitudinal edge regions of the clothing strip and with their other end engage in recesses in the support body.

In practice, the clips consist of a sheet metal strip,

one longitudinal edge of which pierces the textile material. During assembly, the textile material of the clothing strip is mounted interlockingly, under considerable tension, on the support body of the card top bar, the clips exerting tensile forces such that the textile material is deformed convexly away from the base surface so that, undesirably, the clothing tips also are arranged to the outside on a convex envelope. The card top set so produced has, when unused, an accuracy of 0. 05 mm in height and flatness. The height differences in the set are increased to about 0.2 mm through use. By resharpening the clothing on the machine, the accuracy is improved only insignificantly. After a fibre material throughput of about 400 t, the card top clothing is so worn that it has to be changed. In order to demount the sheet metal cramps, the card top bar is clamped. Using a lever and pliers, the interlocking connection is reversed. The considerable forces during assembly and disassembly have an adverse effect on the dimensional stability of the card top bar. In addition, undesirable tolerances arise during the manufacture of the card top bar body. The mentioned disadvantages have the result that the clothing tips of the clothed card top bar have to be ground (levelled).

It has already been proposed (EP 0 887 445) to attach the clothing strip to a support, e. g. to a steel strip base. The flat steel strip base is inserted between guide grooves in the edge regions of the base area of the card top bar (shaped element), which guide grooves open towards the inside, so that the clothing strip is attached to the card top bar. The manufacture of such a card top bar is complex from the production engineering and assembly standpoints. A particular problem is that the steel strip base and the guide grooves have to be made to fit exactly in order to provide sufficient hold during operation, which, on the other hand, makes replacement more difficult.

It is an aim of the invention to provide a device of the kind described at the beginning that avoids or mitigates the mentioned disadvantages, that especially achieves a dimensionally stable clothed card top bar in a simple manner and makes production of the card top bar and replacement of the clothing strips simpler.

The invention provides a device on a carding machine in which there is at least one card top bar having card top clothing which lies opposite the clothing of a roller, the card top clothing being attached to a carrier member which is mounted on the card top bar, wherein the

outer side of the carrier member and the support body of the card top bar are in interlocking engagement with one another and there is at least one fastening element for fastening the carrier member in engagement with the support body.

Because the outer side of the carrier member and the support body of the card top bar are in interlocking engagement with one another and the carrier member is fixed in the recess by an additional fastening element, production of the clothed card top bar and replacement of the clothing strips is simplified. Manufacturing tolerances of the card top bar, the clothing and during assembly (including disassembly) are reduced or eliminated. With the clothed card top bar according to the invention, an addition of the tolerances during assembly and disassembly of the card top clothing, the technologically damaging levelling grinding and the impairment of the accuracy during use are in advantageous manner substantially avoided.

Advantageously, the outer side has at least one shoulder, rib or the like, which engages in a recess on the card top bar. Advantageously, the shoulder is at a right-angle to the support. Advantageously, the carrier member is made of sheet metal or the like.

Advantageously, the shoulder is formed from at least one bent-over portion, angled portion or the like of the carrier member. Advantageously, the carrier member has in the outer region a bent-over portion, angled portion or the like for holding the clothing strip.

Advantageously, the carrier member consists of two angled sheet metal strips, the shoulders of which are attached to one another. The attachment may be carried out by laser welding or by spot-welding. Advantageously, at least one recess is arranged spaced apart from the edge regions of the support body. Advantageously, there is a recess in the centre of the support body. Advantageously, at least one recess is in the form of a groove that is open towards one side. Advantageously, a recess extends over the length of the support body. Preferably a releasable fastening element is provided. Preferably, there is at least one screw element. Preferably, the screw element is a threaded pin.

Advantageously, in the support body there is at least one bore through which the screw element passes.

Advantageously, the bore extends at a right-angle to the shoulder, rib or the like. Advantageously, the bore has an internal thread. Advantageously, the screw element clamps the shoulder, rib or the like in position.

Advantageously, the screw element presses the shoulder, rib or the like against the opposing inner wall of the groove.

The card top bar may be part of a revolving card top.

The card top bar may be a fixed carding element.

Advantageously, a flexible clothing is present.

Advantageously, the flexible clothing comprises a support and clothing tips, wires, hooks or the like.

Advantageously, the support is strip-shaped.

Advantageously, the clothing consists of saw tooth wire strips, e. g. all-steel clothing. Advantageously, the clothing is attached to the card top bar in the region of the base surface. Advantageously, the clothing strip is attached to the carrier member by adhesive bonding.

Advantageously, there is a compensating step in the base surface of the card top bar. Advantageously, the card top bar and the card top clothing are associated with the same reference plane. Advantageously, the reference plane is a flat counter-surface, for example, plate or the like, for the tips of the card top clothing.

Advantageously, the card top bar is an extruded shaped element made of a light metal, e. g. aluminium.

Preferably, the extruded shaped element is a hollow

shaped element. Preferably, the card top bar is cut to length, e. g. by sawing. Advantageously, the card top bar that has been cut to length is aligned. Advantageously, the support body is associated with two end head members (card top heads). Advantageously, the card top tips are placed on a reference plane and the card top heads are placed on a reference plane and the carrier member with the clothing strips is applied to the support body.

Advantageously, between the carrier member and the card top clothing there is a compensating layer which is able to compensate for different spacings between the card top bar and the card top clothing.

The invention also provides a device on a carding machine for cotton, synthetic fibres and the like, in which there is at least one card top bar having card top clothing (clothing strip) which lies opposite the clothing of a roller, e. g. the cylinder, the card top clothing (clothing strip) being attached to a support which is mounted on the card top bar by way of at least one recess, characterised in that the outer side of the carrier member and the support body of the card top bar are in interlocking engagement with one another and there is at least one fastening element for fastening the carrier member in the recess.

Certain embodiments of the invention will be described in greater detail below with reference to the accompanying drawings, in which: Fig. 1 is a diagrammatic side view of a carding machine having a device according to the invention; Fig. 2 a cut-away view of a slideway and a flexible bend with clothed card top bars, showing the spacing between the clothing of the card top bars and the clothing of the cylinder; Fig. 3a is a side view in section of a card top bar having longitudinal slots, openings, bores and longitudinal groove in a support body; Fig. 3b is a side view of a threaded pin for use with the card top bar of Fig. 3a; Fig. 3c is a side view of a carrier member suitable for use with the card top bar of Fig. 3a; Fig. 3d is a side view in section through a clothing strip; Fig. 4 is a side view of the card top bar of Figs. 3a to 3d with a device according to the invention and a compensating layer in the assembled state;

Fig. 5 is a side view of an embodiment of the carrier member with two shoulders and of the support body with two longitudinal grooves; and Fig. 6a, 6b show a front view (Fig. 6a) and a partial plan view in section (Fig. 6b) of a further embodiment of the device according to the invention with an arrangement for aligning the card top bar for the attachment of the compensating layer.

With reference to Fig. 1, a carding machine, for example a high performance carding machine DK 903 made by Trtzschler GmbH & Co. KG, has a feed roller 1, feed table 2, lickers-in 3a, 3b, 3c, cylinder 4, doffer 5, stripper roller 6, nip rollers 7,8, web guide element 9, sliver funnel 10, delivery rollers 11,12, revolving card top 13 with clothed card top bars 14, can 15 and coiler 16. The directions of rotation of the rollers are indicated by curved arrows. Reference letter A denotes the operating direction. Opposite the cylinder clothing 4a there are arranged fixed carding elements 33 and 34.

According to Fig. 2, on each side of the carding machine there is affixed, laterally on the machine frame, a flexible bend 17 which has a plurality of adjusting

screws. The flexible bend 17 has a convex outer surface 17a and an underside 17b. Above the flexible bend 17 there is a slideway 20, for example made of low-friction plastics, which has a convex outer surface 20a and a concave inner surface 20b. The concave inner surface 20b rests on the convex outer surface 17a and is able to slide thereon in the direction of arrows B, C. Each card top bar, which may be constructed e. g. in accordance with EP 0 567 747 Al, consists of a rear portion 14a and a support body 14b. The support body 14b has a base surface 14c, two side faces 14d, 14e and two upper faces

14f, 14g (see Fig. 3). Each card top bar 14 has at each of its two ends a card top head 14', 14" (see Fig. 6a) each comprising two steel pins 141, 142 and 143,144, respectively, which are mounted, for example adhesively bonded, by an axial portion (see length l in Fig. 6b) in recesses 33a, 33b (see Fig. 6b) of the support body 14b.

The portions of the steel pins 141, 142 projecting beyond the end faces of the support body 14b (see Fig. 6b) slide on the convex outer surface 20a of the slideway 20 in the direction of arrow D. The clothing strip 18 is mounted on the underside of the support body 14b. Reference numeral 21 denotes the circle of the tips of the card top clothings 19. The cylinder 4 has on its circumference a

cylinder clothing 4a, for example saw tooth clothing.

Reference numeral 22 denotes the circle of the tips of the cylinder clothing 4a. The spacing between the circle of tips 21 and the circle of tips 22 is indicated by reference letter a and is, for example, 3/1000" (0. 075mm). The spacing between the convex outer surface 20a and the circle of tips 22 is indicated by reference letter b. The spacing between the convex outer surface 20a and the circle of tips 21 is indicated by reference letter c. The radius of the convex outer surface 20a is indicated by the reference letter r1 and the radius of the circle of tips 22 is indicated by reference letter r2.

The radii r1 and r2 intersect at the centre point M of the cylinder 4.

In the embodiment of Fig. 3a, in the support body 14b of the card top bar 14, which is extruded from aluminium, there are arranged across the width two longitudinal slots 14d and 14e which are open towards the outside (see Fig. 6a), which slots widen towards the centre of the card top bar 14 to form hollow-cylindrical openings 14f and 14g. In the openings 14f, 14g there is shown the respective fastening region of the card top pins 141'142, 143, 144. In the centre of the card top bar 14 there is a longitudinal groove 14i which is open

towards the base surface 14c and extends across the width. Between the opening 14g and the longitudinal groove 14i there is a plurality of through bores 14h (see Fig. 6b), which extend substantially parallel to the base surface 14c. The bores 14h are aligned perpendicularly to the longitudinal groove 14i. The bores 14h have an internal thread arranged for engagement with the external thread of threaded pins 28 according to Fig. 3b. A carrier member 26 according to Fig. 3c consists of two sheet metal strips 26a, 26b, the respective end regions of which are bent over at a right-angle in the same direction, that is to say sheet metal strip 26a counterclockwise and sheet metal strip 26b clockwise. The bentover regions 26'and 26"of the sheet metal strips 26a and 26b, respectively, are attached to one another by laser welding and thus form a shoulder 26c, which is mounted in the longitudinal groove 14i (Fig. 3a). The bent-over regions 26III and 26IV serve for additionally holding the support element 23 of the clothing strip 18 (Fig. 3d). Referring to Fig. 3d, the clothing strip 18 consists of clothing tips 19 (wire hooks) and a support element 23 made of a textile material. The thickness of the support element 23 is indicated by reference letter f. The wire hooks 19 are mounted by one end, through the

surface 23", in the support element 23. The other end of the wire hooks 19, the clothing tips, is free.

Fig. 4 shows the card top bar 14 according to Figures 3a to 3d in an assembled state. The clothing strip 18 is attached to one side 261 of the carrier member 26, for example by adhesive bonding, and the shoulder 26c of the carrier member 26 is arranged pushed into the longitudinal groove 14i of the support body 14b, so that the other side 262 (the outer side) of the carrier member 26 and the support body 14b are in interlocking engagement with one another. The threaded pins 28 (see Fig. 6a, 6b), when screwed in, press the shoulder 26c against the inner wall of the longitudinal groove 14i lying opposite the threaded pin 28, so that the carrier member 26 with the clothing strip 18 is attached to the card top bar 14. In addition to the elements shown in Fig. 3a to 3d, according to Fig. 4 an intermediate layer 24, for example of cured synthetic resin or the like, is arranged between the inner surface 262 of the carrier member and the support element 23. The compensating layer 24 is able to compensate for different spacings between the card top bar 14, namely the base surface 14c, and the card top clothing 19, namely the envelope of the free tips.

In the embodiment of Fig. 5, two longitudinal grooves 14i1 and 14i2 are arranged in the support body 14b and engage two shoulders 26ci and 26c2, respectively, which are attached by threaded pins 28a and 28b, respectively.

The threaded pins 28a and 28b engage through the bores 14h1 and 14h2, respectively, from different, opposing sides.

As in the embodiment of Figs. 6a and 6b, it is possible in the embodiments of Figs. 4 and 5 there may be arranged between the card top pins 141, 142 and a flat plate 25 a parallelepipedal supporting element 27a having parallel and flat surfaces and between the card top pins 143,144 and the plate 25 a further parallelepipedal supporting element 27b of the same height h in fixed position on the plate 25. Using this device and further lateral rib elements or the like (e. g. displaceable boundary surfaces for the compensating layer 24 and/or the support element 23) (not shown), the clothing tips 19 of the clothing strip 18 can be positioned on the plate 25, and the card top bar 14 with the pins 141, 142, 143, 144 on the supporting elements 27a, 27b. The compensating layer 24 is then introduced between the support 26 and the support element 23. This can be effected e. g. by pouring, injecting, brush application, inlaying or the

like. The compensating layer 24, which is e. g. pasty, distributes itself in the intermediate space which it fills up in a compensating manner.

In the configuration of the invention according to Figures 6a and 6b, the bores 14h1 and 14h2 - seen in the direction of length h-are arranged staggered relative to one another. A plurality of threaded pins 28a and 28b are present on opposing sides of the support body 14b, which pins fasten the shoulder 26c in the longitudinal groove 14i (see Fig. 4).

Claims

Claims 1. A device on a carding machine in which there is at least one card top bar having card top clothing which lies opposite the clothing of a roller, the card top clothing being attached to a carrier member which is mounted on the card top bar wherein the outer side of the carrier member and the support body of the card top bar are in interlocking engagement with one another and there is at least one fastening element for fastening the carrier member in engagement with the support body.
2. A device according to claim 1, in which the outer side has at least one protrusion which engages in a recess on the card top bar.
3. A device according claim 2, in which the protrusion is perpendicular to the carrier member.
4. A device according to claim 2 or claim 3, in which the protrusion is formed from at least one bent-over portion, angled portion or the like of the carrier member.
5. A device according to any one of claims 2 to 4, in which the carrier member consists of two angled sheet metal strips, protrusions of which are attached to one another.

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6. A device according to claim 5, in which the attachment is carried out by laser welding.
7. A device according to claim 5, in which the attachment is carried out by spot-welding.
8. A device according to any one of claims 1 to 3, in which the carrier member is made of sheet metal or the like.
9. A device according to any one of claims 1 to 8, in which the carrier member has in the outer region a bentover portion, angled portion or the like for holding the clothing strip.
10. A device according to any one of claims 1 to9, in which at least one recess is arranged spaced apart from the edge regions of the support body.
11. A device according to any one of claims 1 to 10, in which there is a recess in the centre of the support body.
12. A device according to any one of claims 1 to 11, in which at least one recess is in the form of a groove that is open towards one side.
13. A device according to any one of claims 1 to 12, in which a recess extends over the length of the support body.

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14. A device according to any one of claims 1 to 13, in which a releasable fastening element is provided.
15. A device according to any one of claims 1 to 14, in which there is at least one screw element.
16. A device according to claim 15, in which the screw element is a threaded pin.
17. A device according to any one of claims 1 to 16, in which in the support body there is at least one bore through which the fastening element passes.
18. A device according to any one of claims 1 to 17, in which a bore in the support body for a fastening element extends at a right-angle to a protrusion of the carrier member.
19. A device according to claim 18, in which the bore has an internal thread.
20. A device according to any one of claims 1 to 19, in which the fastening element clamps a protrusion of the carrier member in position.
21. A device according to any one of claims 1 to 20, in which the fastening element presses a protrusion of the carrier member against the opposing inner wall of a groove of the support body.
22. A device according to any one of claims 1 to 21, in which the card top bar is part of a revolving card top.

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23. A device according to any one of claims 1 to 21, in which the card top bar is a fixed carding element.
24. A device according to any one of claims 1 to 23 in which a flexible clothing is present.
25. A device according to claim 24, in which the flexible clothing comprises a support and clothing elements.
26. A device according to claim 25, in which the clothing elements are clothing tips, wires or hooks.
27. A device according to claim 25 or claim 26, in which the support is strip-shaped.
28. A device according to any one of claims 1 to 27, in which the clothing consists of saw tooth wire strips.
29. A device according to claim 28, in which the clothing is all steel clothing.
30. A device according to any one of claims 1 to 29, in which the clothing is attached to the card top bar in the region of the base surface thereof.
31. A device according to any one of claims 1 to 30, in which the clothing is attached to the carrier member by adhesive bonding.
32. A device according to any one of claims 1 to 31, in which there is a compensating step in the base surface of the card top bar.

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33. A device according to any one of claims 1 to 32, in which the support body is an extruded shaped element made of a light metal.
34. A device according to claim 33, in which the support body is of aluminium.
35. A device according to claim 33 or claim 34, in which the extruded shaped element is a hollow shaped element.
36. A device according to any one of claims 1 to 35, in which the card top bar can be cut to length.
37. A device according to claim 36, in which the card top bar that has been cut to length can be aligned.
38. A device according to any one of claims 1 to 37, in which the support body is associated with two end head members (card top heads).
39. A device according to any one of claims 1 to 38, in which between the carrier member and the card top clothing there is a compensating layer which is able to compensate for different spacings between the card top bar and the card top clothing.
40. A card top bar with card top clothing comprising a support body and a carrier member engageable with said support body, the card top clothing being attached to the carrier member, one of said carrier member and said support body having a recess and the other of said

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carrier member and support body having a protrusion arranged to be engageable in said recess.
41. A card top bar according to claim 40, in which a fastening element is provided for securing the protrusion in engagement within said recess.
42. A card top bar according to claim 50 or claim 41, which is further as defined in any one of claims 1 to 39.
43. A device on a carding machine for cotton, synthetic fibres and the like, in which there is at least one card top bar having card top clothing (clothing strip) which lies opposite the clothing of a roller, e. g. the cylinder, the card top clothing (clothing strip) being attached to a carrier member which is mounted on the card top bar by way of at least one recess, characterised in that the outer side of the carrier member and the support body of the card top bar are in interlocking engagement with one another and there is at least one fastening element for fastening the carrier member in the recess.
44. A card top bar substantially as described herein with reference to and as illustrated by any of Figs. 1, 2,3a to 3d, 4,5, 6a and 6b.
45. A method of making a card top bar comprising causing a carrier member and a support body as defined in any of claim 1 to 44 to become engaged with one another and

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securing them in engagement by means of a fastening element.
46. A method according to claim 45, in which the card top bar and the card top clothing are associated with the same reference plane.
47. A device according to claim 46, in which the reference plane is a flat counter-surface for the tops of the card top clothing.
48. A method according to any one of claims 45 to 47, in which the card top tips are placed on a reference plane and the card top heads are placed on a reference plane and the carrier member with the clothing strips is applied to the support body.