CN112689690B

CN112689690B - Carding machine with device for adjusting gap between fixed element and cylinder

Info

Publication number: CN112689690B
Application number: CN201980059519.8A
Authority: CN
Inventors: 迪特玛·弗洛克; 亚历山大·霍恩
Original assignee: Trutschler Group Europe
Current assignee: Trutschler Group Europe
Priority date: 2018-10-09
Filing date: 2019-08-01
Publication date: 2023-04-07
Anticipated expiration: 2039-08-01
Also published as: WO2020074149A1; EP3864203B1; EP3864203A1; BR112021005490A8; BR112021005490A2; DE102018124878B3; CN112689690A

Abstract

The invention relates to a carding machine having a device for adjusting the gap between a stationary carding element (20), a suction hood or a chopper and a cylinder (4), wherein the stationary carding element (20), suction hood or chopper interacts with at least one curved sliding strip (31) which is arranged by means of an extension arc (30), wherein the extension arc (30) is arranged on the side plates on both sides of the cylinder (4), wherein each sliding strip (31) is designed in the form of a wedge and is arranged movably on the surface of the wedge of the extension arc (30) facing each other, wherein the sliding strip (31) is adjustable and fixable on the extension arc (30) by means of an adjusting device (36). The invention is characterized in that the comb element (20), the suction hood or the chopper is arranged on the sliding strip (31) by means of a pretensioning, and the distance to the cylinder (4) can be adjusted by means of said pretensioning.

Description

Carding machine with device for adjusting gap between fixed element and cylinder

Technical Field

The invention relates to a carding machine having a device for adjusting the gap between a stationary carding element, suction hood or chopper and a cylinder, wherein the stationary carding element, suction hood or chopper interacts with at least one curved sliding bar which is arranged on the side plates on both sides of the cylinder by means of an extension arc, wherein each sliding bar is wedge-shaped and is arranged movably on the surfaces of the wedges of the extension arc facing each other, wherein the sliding bar can be adjusted and fixed on the extension arc by means of an adjusting device.

Background

In the case of the carding machines of the present embodiment, a stationary carding element, a suction element and a chopper are used in the front carding zone and in the rear carding zone, with which the fibre web is loosened and dirt or impurities are removed. In this case, the stationary element has a defined distance from the cylinder of the carding machine, which distance is not normally variable during continuous operation. When the machine is stopped, the fixed elements are adjusted in distance from the cylinder and fixed by means of the adjusting elements. According to the current state of the art, simultaneous adjustment of all the positionally fixed elements is not practical. Since the gap between the stationary element and the cylinder must be between 1/10mm and 2/10mm and the components of the carding machine can change due to thermal loads, the defined gap is adjusted in the cold state, which gap shrinks during operation. However, a collision may thus occur between the stationary element and the cylinder.

DE102005052142A1 describes an extension arc, the radius of which relative to the cylinder is adjustable. The radius of the extension arc can be adjusted by means of an adjustment shaft to the distance from the cylinder, so that the fixed elements arranged thereon likewise change their distance from the cylinder.

DE19831139B4 describes an extension arc whose outer diameter in the form of two oppositely movable wedge-shaped strips can be varied. On this extension arc a fixed comb element is arranged, the distance of which to the cylinder varies as the wedge-shaped slats move. The fastening of the fixed comb element is effected here by means of a tension belt, which is fastened to the back of all the attached fixed comb elements. Each stationary element must also be fixed separately here.

Disclosure of Invention

The aim of the invention is to improve an adjusting device for a fixed element of a carding machine, wherein the distance between the element and a cylinder can be accurately adjusted by the adjusting device.

According to the invention, the carding machine has a device for adjusting the gap between the stationary carding element, suction hood or chopper and the cylinder, wherein the stationary carding element, suction hood or chopper interacts with at least one curved sliding strip which is arranged on the side plates on both sides of the cylinder by means of an extension arc, wherein each sliding strip is designed in the form of a wedge and is arranged movably on the surfaces of the wedges of the extension arc facing each other, wherein the sliding strip is adjustable and fixable on the extension arc by means of an adjusting device.

The invention comprises the technical teaching that the comb element, the suction hood or the chopper is arranged on the slider strip with pretension and that the distance to the cylinder can be adjusted by means of said pretension. By means of the pretensioning, the element is held with sufficient force on the sliding strip, but can nevertheless be adjusted in the combing gap during the movement of the sliding strip without having to release the fastening element. The pretensioning is arranged in such a way that the element cannot remove larger fibre flocks from the slider strip in the front carding zone. By means of the invention, a completely automatic adjustment of the carding gap in the front carding zone, the main carding zone and the rear carding zone can be achieved.

It is also advantageous if the comb element, the suction hood or the chopper is connected to the extension arc by means of at least one fastening element. The fastening of the element to the extension arc ensures a positionally fixed arrangement of the element relative to the cylinder, wherein the sliding bar is adjustably arranged between the element and the extension arc. Thereby ensuring that the element is adjustable only in distance from the cylinder.

The at least one fastening element surrounds or passes through the sliding strip, whereby the displaceability of the sliding strip is ensured.

The pretensioning is preferably generated by spring elements or hydraulic or pneumatic elements. The magnitude of the pretension is thereby adjustable and can be adapted to the operating conditions.

The spring element or the hydraulic or pneumatic element for generating the pretensioning can be designed such that the pretensioning force is reduced or eliminated during the displacement of the sliding strip in order to reduce the friction occurring between the element and the sliding strip. In this case, the spring force can be reduced or eliminated by means of pneumatic elements. When using hydraulic or pneumatic elements, the pressure for generating the pretensioning can be reduced.

In a preferred embodiment, the sliding strip has at least one recess or slot, through which the at least one fastening element passes. In this combination, a cylinder, for example a pin or a bolt, is used as the fastening element, which cylinder cooperates with the recess or the slot. Even if the sliding slats are not guided in the recesses of the extension arc, but an alternative embodiment is selected here, it is still sufficient to guide the sliding slats by this combination.

The at least one fastening element can preferably be configured as a screw, clip or sliding block which passes through or surrounds the sliding strip.

By applying the spacer elements, it is possible to adjust different distances between the carding element, the suction hood or the chopper and the cylinder after the preliminary adjustment. Whereby the distance between the comb element and the cylinder can be adjusted to, for example, 1/10mm, and the distance between the chopper and the cylinder can be adjusted to, for example, 2/10mm. During the actuation of the sliding slats, all distances are increased or decreased by the same value, wherein different preconditions are maintained.

The adjusting device can preferably be operated manually or motor-driven. The adjusting device can be controlled by a control device, and the control device can determine and adjust the clearance between the carding element, the suction hood or the cutting blade and the cylinder, thereby realizing the carding machine with fully automatic carding clearance adjustment in the front carding zone, the main carding zone and the rear carding zone.

Drawings

In addition, the measures for improving the invention are further illustrated below with the aid of the description of preferred embodiments of the invention and with reference to 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 schematic view of a wedge-shaped slat with an adjusting device according to the invention;

FIG. 3 shows another schematic view of a wedge-shaped slat with an adjusting device according to the invention;

fig. 4 shows a cross-sectional view of an elongated arc with a sliding strip.

Detailed Description

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

lickerin rollers

3a, 3b, 3c to a cylinder 4 or drum. On the cylinder 4, the fibers of the loose 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 14 arranged on a revolving flat system 17. The resulting web is then fed 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 by means of a flare 10, which is delivered via

drawing rolls

11, 12 to a subsequent processing machine or sliver can 15. The comb element 14 is adjusted relative to the cylinder 4 (comb gap) by means of sliding bars 18 having wedge-shaped elements facing each other.

In the region of the fixed comb element 20, the suction hood and the chopper, extension arcs 30, which have substantially the radius of the cylinder 4, are arranged on both sides of the carding machine 100. The extension arc 30 is arranged on a side plate, not shown, on both sides of the cylinder 4 and is fixed to the side plate, either detachably or non-detachably. For example, the extension arc 30 can also be cast or welded onto the side plate. The comb element 20 shown here has two end plates 21, the height and inclination of which end plates 21 can be adjusted on a base plate 22 by means of fixing elements 23. During which the distance between the comb element 20 and the cylinder 4 is preliminarily adjusted. The spring element 24 produces the necessary pretensioning between the end plate 21 and the base plate 22 of the comb element 20. In the case of the suction hood and the chopper, the adjustment of the distance is not performed by the base plate shown here, but by other adjusting elements. According to the prior art, the base plate 22 is fixed to the extension arc 30 by means of fixing elements 33. Since the distance of each comb element 20, suction hood and chopper to the cylinder can be adjusted differently, so-called spacer elements 35 can be selectively applied, with which spacer elements 35 further fine adjustments are made after the initial adjustment. The spacer element 35 is pushed into the space between the base plate 22 and the extension arc 30 on the end side. In order to better distinguish the individual spacer elements 35, the spacer elements 35 can be embodied in different colors, wherein a separate spacing range or distance range is associated with each color. A suction hood and a chopping knife, not shown here, are likewise fastened to the extension arc 30 by means of the base plate 22 and the fastening element 33.

Each extension arc 30 may have a recess 30a, in which recess 30a wedge-shaped sliding strip 31 is arranged. The surface of the recess 30a is likewise wedge-shaped and interacts in the opposite direction with the wedge-shaped sliding strip 31. The tips of the individual wedges face each other here. By means of the adjusting device 36, the wedge-shaped sliding strip 31 can be moved in the groove 30a, so that the outer surface 31a of the sliding strip 31 has a greater or lesser distance from the groove bottom, whereby the radius of the surface of the sliding strip 31 is also changed. The distance between the comb element 20 and the cylinder 4 can be adjusted by this change in distance, said comb element 20 being fixed on both sides to the extension arc 30 by the base plate 22. Or in other words, the gap between the comb element 20 and the cylinder 4 is changed with said change in distance. Since the base plate 22 is screwed firmly to the extension arc 30 according to the prior art, each screw must first be loosened before the distance of the base plate 22 from the extension arc 30 can be adjusted.

According to the invention, the comb element 20 is connected to the extension arc 30 via the base plate 22 in a stationary manner by means of a fastening element 33, wherein a movable sliding bar 31 is arranged between the base plate 22 of the comb element 20 and the extension arc 30. In order to be able to move the sliding bar 31 in the groove 30a of the extension arc 30 without loosening the fastening element 33, the comb element 20 is pressed onto said sliding bar 31 by means of a pretensioning force. During the adjustment of the sliding strip 31, the friction between the wedge strip and the wedge-shaped groove is increased by the pretensioning force, but it is thereby ensured that the base plate 22 of the comb element 20 always rests on the sliding strip 31. The comb element 20 is thus fixed in position by the fixing element 33 in the radial direction, but can be changed in position in the direction towards the cylinder 4 (i.e. in the direction axial to the fixing element 33). Preferably, for the movement of the sliding strip 31 or during the movement of the sliding strip 31, the pretensioning force can be reduced by means of a decompression in a pneumatic or hydraulic pretensioning element. The spring 24 shown in the present exemplary embodiment can be relieved of load, for example, by means of a pneumatic pressure cushion for the control process. Each carding element 20, suction hood and chopper has an individual element for generating a pretensioning force, which can be adjusted individually. The distance of each comb element 20, suction hood and chopper to the cylinder can thereby be adjusted individually and independently of the other components.

The structural embodiment of the present exemplary embodiment provides that the sliding strip 31 has an elongated hole 32 or a groove, through which the fastening element 33 passes and thereby connects the base plate 22 to the extension arc 30. The base plate 22 is arranged under force or with pretension on the sliding strip 31 and can be adjusted in height relative to the elongate arc 30 by means of said sliding strip 31. In the simplest case, this force loading or pretensioning takes place by means of a spring 34, which interacts with the fastening element 33. Alternatively, pneumatic or hydraulic actuating elements can also be used for such force loading or pretensioning. The force element can be arranged on the outer diameter of the extension arc or on the inner diameter. By fastening to the extension arc 30, the comb element 20 is arranged in a stationary manner and is adjustable in height or distance from the extension arc 30. The adjustment is effected by means of an adjusting device 36 by displacing a wedge-shaped sliding strip 31, the displacement of the sliding strip 31 taking place by means of the force loading or pretensioning of the spring 34. On the adjustment scale 37, the variation of the radial gap between the comb element 20 and the cylinder can be read and controlled. The adjustment of the sliding strip 31 can be carried out manually or by means of a motor drive. Both variants can be satisfied by the adjusting device 36. The motor-type adjustment of the sliding bar 31 can be controlled by means of a control device which detects the gap between the comb element 20, the suction hood and/or the chopper and the cylinder. Instead of the fastening elements 33 described here in the form of screws, clips or sliders bridging the sliding strips 31 can likewise connect the comb element 20 to the extension arc 30 in a positionally fixed manner, wherein the sliding strips 31 are then arranged movably below the clips or sliders. The clip or slide can likewise be pressed onto the sliding web 31 by means of a compression spring or a disk spring, or by means of a pneumatic or hydraulic pretension or force.

According to fig. 2 to 4, the extension arc 30 has an arc-shaped guide in the region of the lateral end face, which can be configured as a long hole 30b, wherein the guide extends over the circumference of the extension arc 30 over an arc of up to 20 °. The elongated hole 30b extends in depth only to approximately the center of the cross section of the extension arc 30. A guide element 38 is slidably arranged in the elongated hole 30b, the guide element 38 and the fixing element 40 being clampingly fixed together by means of a pin 39. The guide element 38 can be configured, for example, as a slider. To avoid jamming, the guide element 38 can likewise be slightly curved in accordance with the curved slot 30 b. Orthogonal to the elongated hole 30b, another elongated hole 30c is provided in the extension arc 30 extending from the groove 30a to the elongated hole 30 b.

The

elongated holes

30b, 30c meet in the central cross section of the extension arc and end there, the cross-shaped arrangement of which only insignificantly reduces the resistance torque of the support element 30. Since the cross section is only insignificantly weakened, the adjustment by the adjustment device 36 and thus the bending of the extension arc 30 causes little deviation of the surface of the recess 30a from the ideal arc. The elongated hole 30c extends over the same arc or circumference as the elongated hole 30b and accommodates a driver 41, which driver 41 is fixed in the guide element 38 and is guided in the elongated hole 30c. In this case, the driver 41 projects with its head from the surface of the recess 30 a. The head 41a of the driver 41 engages again without play in the receptacle or opening of the sliding strip 31. The head 41a of the driver 41 can be designed as a spherical cap or as a ball head. In order to reduce the tilting of the guide element 38, two catches 41 can also be arranged in the elongated hole 30c at a distance from one another and connected to the guide element 38. Alternatively, the adjustability of the sliding slats can also be achieved by means of toothed bars and pinions known from the prior art.

The exemplary embodiments described are not limited to the adjustability of the comb element, but can also be applied to suction hoods and choppers which are to be adjusted in terms of their distance from the cylinder of the carding machine during continuous operation.

List of 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 guiding element

10. Horn mouth

11. Traction roller

12. Traction roller

14. Carding element

15. Sliver can

17. Revolving cover plate system

18. Sliding strip

20. Carding element

21. End plate

22. Substrate

23. Fixing element

24. Spring

30. Extension arc-shaped part

30a groove

30b long hole

30c long hole

31. Sliding lath

32. Long hole

33. Fixing element

34. Spring

35. Spacer element

36. Adjusting device

37. Scale meter

38. Guiding element

39. Pin

40. Fixing element

41. Driving part

41a head.

Claims

1. Carding machine with a device for adjusting the gap between a stationary carding element (20), suction hood or chopper and a cylinder (4), wherein the stationary carding element (20), suction hood or chopper cooperates with at least one curved sliding strip (31) which is arranged on the side plates on both sides of the cylinder (4) by means of an extension arc (30), wherein each sliding strip (31) is wedge-shaped and is arranged movably on the surfaces of the wedge faces of the extension arc (30) which face each other, wherein the sliding strip (31) is adjustable and fixable on the extension arc (30) by means of an adjusting device (36), wherein the carding element (20), suction hood or chopper is arranged on the sliding strip (31) with pretensioning and can be adjusted with the pretensioning to the distance from the cylinder (4), characterized in that the carding element (20), suction hood or chopper is connected to the extension arc (30) by means of at least one fixing element (33), wherein the at least one sliding strip (31) or chopper surrounds the comb element (33), wherein the at least one fixing element (33) passes through the at least one sliding strip (31).

2. A carding machine as in claim 1, characterised in that the pretensioning is generated by spring elements, hydraulic or pneumatic elements.

3. A carding machine as in claim 1, characterised in that said sliding slats (31) have at least one void or slot (32), said at least one fixing element (33) passing through said slot (32).

4. Carding machine according to claim 1, characterised in that said at least one fixing element (33) is configured as a bolt, clip or slider.

5. Carding machine according to any of the preceding claims, characterised in that the distance between the carding element (20), suction hood or chopper and the cylinder (4) can be varied by means of a spacer element (35).

6. A carding machine as in claim 1, characterised in that said adjustment means (36) are operated manually or motor-driven.

7. Carding machine according to claim 6, characterised in that the adjustment device (36) is controllable by a control device, with which the gap between the carding element (20), suction hood or chopper and the cylinder (4) can be determined and adjusted.