CN115885065A

CN115885065A - Card clothing wire

Info

Publication number: CN115885065A
Application number: CN202180030062.5A
Authority: CN
Inventors: C·德拉特瓦; G·伦巴多; C·沃尔纳
Original assignee: Graf und Cie AG
Current assignee: Graf und Cie AG
Priority date: 2020-04-23
Filing date: 2021-04-21
Publication date: 2023-03-31
Also published as: EP4139511A1; CH717341A1; WO2021214680A1

Abstract

The invention relates to a card clothing wire (1) for a cylinder of a textile machine, said wire having a total height (h) ₁ ) And has a plurality of successively arranged tooth-possessed depths (h) ₆ ) The teeth (2, 3). Each tooth (2, 3) has a tooth breast surface (4), a tooth back surface (5) and a tooth tip (6). The tooth back (5) of the tooth (2) transforms into a tooth flank (7) at the end opposite the tooth tip (6), which in turn transforms into a tooth flank (4) of the adjacent tooth (3). The tooth flank (7) has, starting from the tooth flank (5), a first portion (8) and a second portion (9) immediately following the first portion (8), wherein the first portion (8) has a flat or concave shape and the second portion (9) has a convex shape.

Description

Card clothing wire

The invention relates to a card clothing wire for a roller of a textile machine. All-steel clothing or clothing wires are used in different areas where textile fibres are treated. The invention relates to a card clothing wire for use on a roller in a fibre processing process, in particular for use on a roller of a carding machine or card. When applied to a roll, the card wire in the form of a saw-tooth all-steel card clothing is wound onto the roll in a helical and tightly abutting manner or in the form of grooves. A common form of saw tooth-all steel card clothing is described in international standard ISO 5234 (2004). The all-steel clothing is further adjusted according to the standard by its working angle α, its back angle γ, its pitch p and tooth depth h ₆ Total height h of the steel wire ₁ And the length l of the tip face. The working angle is the angle between the flank of the tooth, which represents the flank face at the front as seen in the direction of motion, and the perpendicular for the wire base. Instead of a wire base, it is also possible to form a line between the two tips, wherein in this case the working angle is the angle between the breast surface of the tooth and the perpendicular to the line. If the chest angle α is equal to zero angle, the chest surface is thus perpendicular or perpendicular to the wire base. The back angle γ is in this description the angle between the back face, which is the tooth flank behind as seen in the direction of movement, and the perpendicular for the wire base or the connecting line. If the back angle γ is equal to zero angle, the back face is thus perpendicular or perpendicular to the wire base. In the sense of the present description, not only the back but also the breast side are not necessarily straight sides, but can be convexly or concavely shaped, or be provided with grooves or channels, or be formed by a plurality of sides which are curved relative to one another, or represent a combination of these configurations.

In the course of the fiber processing, such as opening and washing of fibers or fiber flocks, high demands are placed on the all-steel clothing or clothing wires used, in particular with regard to effective parallelization of the fibers in the carding process or fiber transfer between different rolls without causing damage to the fibers. The condition for this is to guide the fibres as far as possible over the surface of the card clothing. The transfer of the fibers from the first roll to the other roll should likewise be given a high degree of significance. In the case of a carding machine, this involves, firstly, the card wire being applied to the cylinder. The card wire determines notably the transfer of the fibres from the feed roll onto the drum and from the drum to the doffer, together with the guidance of the fibres during carding.

Many formed sections of card wire are known from the prior art. CN 105 839 a and CN 205 035 530U, for example, disclose a card wire having a root surface that is raised towards the breast surface of the tooth. Wherein the tooth flank adjoins the back flank and the transition to the breast flank of the next tooth is raised relative to the wire base by the raised profile. DE 10 2016 114 A1 discloses a similar shaping of the tooth flank in its course from the back of one tooth to the breast of the following tooth. A disadvantage of the disclosed embodiment is that, as the tooth flank is continuously raised, the fibres to be processed are lifted by the movement of the card wire without defining the plane of the fibre web produced by the fibres. The fibers, although directed upwardly by a length, are distributed over the entire raised area of the tooth flank. This has the result that the fibers to be processed are only partially lifted out of the deepest point of the tooth flank, which additionally negatively affects the efficiency of the fiber transfer.

The aim of the invention is to provide a clothing wire which allows the guidance of the fibres on the surface of the clothing wire by defining the plane of the fibre web between the deepest point of the tooth flank and the tooth tip of the clothing wire.

The object is achieved by the features in the characterizing part of the independent claims.

To solve the problem, a method for spinning machine,Card clothing wire, in particular for a roller of a carding machine or carding machine, having a total height (h) ₁ ) And having a plurality of successively arranged tooth depths (h) ₆ ) Wherein each tooth has a tooth flank, a tooth flank and a tooth tip, and the tooth flanks of the teeth transform into tooth root flanks on the end opposite the tooth tip, which in turn transform into tooth flank of the adjacent tooth. The tooth flank has, starting from the tooth flank, a first portion and a second portion immediately following the first portion, wherein the first portion is formed with a flat or concave shape and the second portion is formed with a convex shape.

Due to the convex design of the second section of the tooth flank, the fibers are intermittently lifted by this second section. The lift is achieved with a high slope in the first section and a smaller slope in the second section due to the convex configuration of the tooth flanks. As a result of this, the fibers accumulate in the portion having a smaller slope and constitute the web. The fibers accumulate, for the most part, on a large slope due to the convex configuration of the tooth flank and in the web plane, which occurs above the deepest point of the tooth flank. Fiber transfer is also facilitated by: the fibers are not distributed over the entire tooth depth, but rather accumulate in this defined web plane. The following radial regions of the card clothing are referred to as web planes: the largest part of the fibres carried by the card wire is in said radial area.

The tooth flank has a third section immediately after the second section, wherein the third section is arranged parallel to a line connecting the tooth tips of two successively arranged teeth. By means of the third section, the degrees of stretching of the following parts of the tooth flank are enlarged: the web plane is in the portion. The fibers can thus reach the web plane more easily, since no fiber jams occur in the convexly shaped section of the tooth flank in the region of the smaller slope, even at high throughputs. Another advantage is manifested in the manufacture of the steel wire. Due to the difficulty of constructing the tooth root surface as close as possible to the wire foot in order to improve the filling properties at small tooth heights, the new geometry achieves a greater spacing of the tooth root relative to the wire foot due to the lifting.

In an alternative embodiment, the tooth flank has a third section immediately after the second section, wherein the third section is arranged in the range of a positive 20 angle to a negative 20 angle, preferably a positive 10 angle to a negative 10 angle, with respect to a perpendicular to a line connecting the tooth tips of two successively arranged teeth. By this arrangement of the third section in a plane almost perpendicular to the line, the thickness of the plane of the web can be defined over the length of this section. A definition is also created in which the web plane is arranged relative to the tooth tips in the defined height.

Preferably, the tooth depth is 10% to 50% of the total height of the steel wire in the first section. The tooth depth is determined depending on the specified production height, the location of use of the card wire and the fibrous material to be processed. Card clothing wires for the drums of carding machines typically have a tooth depth of 0.8mm at a total wire height of 2.5mm in high throughput applications for cotton. A tooth depth of less than 10% of the total height of the wire has the result that the card wire is rigid and can therefore be applied poorly to the roller. Accordingly, the card wire having a tooth depth greater than 50% of the total height of the wire becomes soft, and the tooth tip is deformed by the load caused by the fibers and, in particular, dirt particles adhering to the fibers by the large length of each tooth.

In order to be able to significantly raise the web plane towards the tooth tips, the tooth depth at the end of the second section opposite the first section is advantageously between 15% and 60%, particularly preferably between 20% and 50%, smaller than the tooth depth in the first section. As a result, the majority of the fibers are successfully lifted out of the tooth root and the processing thereof is improved. The transfer of fibres from one decorated element to the next is also more effective when the fibre web formed of fibres in the card wire is not in the tooth root. The improved transfer of the fibers, for example from the drum to the unwinding roller in the carding machine, results in an increase in carding efficiency, since no fibers which have already been carded remain in the drum clothing and are thus recirculated several times. Likewise, the quality of the carded sliver in its parallelization can be improved, since the fibers are transferred to the unwinding roller with less forward penetration. In this case, the upsetting of the fibers in the doffer card clothing is reduced and the detachment of the fibers from the cylinder card clothing is also reduced.

In one development, the tooth tip has a tooth tip surface with a length of 0.5mm to 2.0 mm. The design of the tooth tip with the tooth tip surface has advantages with regard to wear of the tooth tip and the consequent necessary regrinding of the tooth tip. In the case of the construction of the tooth tip without tooth tip surfaces, the tooth tip surfaces are already formed after the first regrinding for process reasons. The teeth are reground with a grinding roller, which has the result that the tooth tips are flattened. If the tooth flank is now provided from the beginning, it can be achieved that the properties of the card wire do not change during its service life.

Preferably, the tooth flank has a working angle α of 30 to 50 degrees and the tooth flank has a back angle γ of 40 to 60 degrees. Preferably, the total height of the steel filaments is 0.5mm to 1.5mm. Particularly preferably, a radius of 0.05mm to 0.5mm is formed in the transition region from the tooth flank to the tooth flank. The configuration of the card wire with the geometric shaping in these regions with respect to the total height, working angle and back angle and the transition from one face to the next is particularly suitable for the rolls of high-power carding machines. The rapidly rotating rolls of the high-power carding machine form a thinner web on their circumference during the fibre processing than in the case of a slowly running machine. Smaller roll diameters are also used, which requires a high flexibility of the card wire in its installation.

In an alternative embodiment, in particular for a carding machine, the total height of the steel wires is 2.0mm to 5.0mm. In this embodiment, a radius of 0.5mm to 2.0mm is preferably formed in the transition region from the tooth flank to the tooth flank. The configuration of the card wire with the geometric shaping in these regions with respect to the overall height and the transition from one face to the next is particularly suitable for the rolls of a carding machine, which do not rotate slowly and are larger in their diameter than the rolls of a carding machine.

The card wire is made as a full wire and can be provided with normal, locked or linked feet to allow pulling up on smooth rolls or in grooves as well (Aufziehen).

The card wire is suitable for the roller of a textile machine and is especially suitable for the modified roller of a carding machine, such as a roller. When the clothing wire is applied to the rolls, it is helically pulled up.

The invention is explained below with the aid of exemplary embodiments and is explained in detail with the aid of the figures.

FIG. 1 shows a schematic view of a first embodiment of a card wire according to the invention;

FIG. 2 shows a schematic view of a second embodiment of a card wire according to the invention;

FIG. 3 shows a schematic view of a third embodiment of a card wire according to the invention; and is

Fig. 4 shows a schematic view of a cross-section at position X of fig. 2.

Fig. 1 shows a schematic view of a first embodiment of a card wire 1 according to the invention. The illustrated cutout of the card wire 1 shows the wire base 14 and on the opposite side the

teeth

2, 3 arranged one behind the other in the longitudinal direction 15. In the movement of the card wire 1, the fibres 16 are carried along the longitudinal direction 15 of the card wire by the

teeth

2, 3. The

teeth

2, 3 are regularly and identically arranged in terms of their shape along the card wire 1. The card wire 1 has a total height h ₁ And the teeth have a tooth depth h ₆ . The tooth depth h ₆ Correspondingly from the tooth tip 6 up to the deepest point of the tooth flank 7.

Each

tooth

2, 3 has a tooth tip 6. The tooth tips 6 of the

teeth

2, 3 form a so-called breast surface 4 with their front side. The breast surface 4 is formed at an angle α to the vertical relative to the wire base 14 or to the connecting line 11 between two adjacent tooth tips 6. A back face 5 is arranged from the tooth tips 6 relative to the breast face 4, which back face is inclined at a back angle γ relative to a perpendicular to the wire base 14 or to a connecting line 11 between two adjacent tooth tips 6.

Starting at the tooth tip 6 of the first tooth 2 in the direction from the first tooth 2 to the second tooth 3, the rear face 5 runs obliquely in the direction of the wire base 14 and transitions into a tooth flank 7. The tooth flank 7 in turn adjoins the flank 4 of the second tooth 3 at its end remote from the back face 5. The breast surface 4 in turn leads to the tooth tips 6 of the second teeth 3. The tooth flank 7 has a first portion 8 which, in the embodiment shown, runs parallel to a connecting line 11 in one plane and then transforms into a second portion 9. The second portion 9 exhibits a convex configuration which ends at the breast surface 4 of the second tooth 3. Tooth depth h in the first section 8 ₆ In the second section, to the tooth depth k. The tooth depth h is produced by the convex shape of the tooth flank 7 in the second section 9 ₁ From the first section 8 towards the end of the second section 9 by an intermittent decrease: so that the reduction rises sharply at the beginning of the second section 9 and decreases again towards the end of the second section 9. Both the increase and the decrease of the reduction are not continuous, which contributes to the production of a web plane 17 in the region of the transition from the second section 9 of the tooth flank 7 to the breast surface 4. The transition from the rear side 5 to the first portion 8 of the tooth flank 7 and the transition in the further course from the first portion 8 to the second portion 9 and from the second portion 9 to the breast side 4 is shown rounded. For the fiber processing as the most important transition zone, the abutment of the root surface 7 with the breast surface 4 should be observed, which abutment is indicated by the radius 13.

In the second and third exemplary embodiments according to fig. 2, 3 and 4, the same reference numerals are used for the same features as in fig. 1. In the following, a special configuration of the card wire 1 is described in each case, which differs from the embodiment according to fig. 1, and a repeated description is dispensed with.

The second embodiment according to fig. 2 differs from the first embodiment according to fig. 1 in that the first portion 8 of the tooth flank 7 has a concave profile. Furthermore, a third portion 10 adjoins the second portion 9 of the tooth flank 7, which third portion 10 then transforms into the flank 4 of the immediately following tooth 3. The third section 10 is arranged parallel to the connecting line 11, as a result of which a web plane 17 can be formed on this section 10 of the tooth flank 7. In addition, the tooth tip 6 is formed with a tooth tip surface 12 having a length l.

The third embodiment according to fig. 3 differs from the first embodiment according to fig. 1 in that the first portion 8 of the tooth flank 7 has a concave profile. Furthermore, a third portion 10 adjoins the second portion 9 of the tooth flank 7, which third portion 10 then transforms into the flank 4 of the immediately following tooth 3. The third section 10 is arranged at an angle to the line 11 of the

tooth tips

2, 3. The angle is selected such that: such that the orientation of the third portion 10 of the tooth flank is arranged perpendicular or at least almost perpendicular to the connecting line 11. By means of this shaping, a depression is produced, in the region of which depression the web plane 17 is formed.

Fig. 4 shows a cross section at the position X of fig. 3 in a schematic view. The card clothing wire 1 has a total height h from the wire base 14 up to the tooth tip 6 ₁ And has a tooth depth h from the tooth flank 7 to the tooth tip 6 ₆ . The clothing wire 1 is tapered in its course from the wire base 14 to the tooth tip 6 in the section in which the tooth is formed. The card wire 1 has a width b at the wire base 14 ₁ And has a width b at the tooth tip 6 ₃ 。

The invention is not limited to the embodiments shown and described. Modifications within the scope of the claims are likewise possible as are combinations of features, even if these features are shown and described in different embodiments.

List of reference numbers:

1. card clothing wire

2. Tooth

3. Tooth

4. Tooth chest surface

5. Dorsal surface of tooth

6. Tooth tip

7. Tooth root surface

8. First section of tooth flank

9. Second section of tooth flank

10. Third section of the tooth flank

11. Connecting line between two adjacent tooth tips

12. Tooth tip surface

13. Radius of the pipe

14. Steel wire base

15. Longitudinal direction

16. Fiber

17. Plane of the web

Alpha working angle

Back angle of gamma first tooth tip

h ₁ Total height of steel wire

h ₆ Depth of tooth

b ₁ Width of steel wire

b ₃ Width of tooth tip

Depth of k teeth

l length of the tooth tip face.

Claims

1. Card clothing wire (1) for a roller of a textile machine, having a total height (h) ₁ ) And has a plurality of successively arranged tooth-possessed depths (h) ₆ ) Wherein each tooth has a tooth flank (4), a tooth flank (5) and a tooth tip (6), and the tooth flank (5) of a tooth (2) transforms at the end opposite the tooth tip (6) into a tooth root surface (7) which in turn transforms into the tooth flank (4) of an adjacent tooth (3), and wherein the tooth root surface (7) has, starting from the tooth flank (5), a first section (8) and a second section (9) immediately following the first section (8), wherein the first section (8) is configured flat or with a tooth tip (6)The tooth flank (7) has a third portion (10) which follows the second portion, wherein the third portion (10) is arranged parallel to a line (11) connecting the tooth tips (6) of two successively arranged teeth (2, 3) or is arranged at an angle ranging from a positive angle of 20 to a negative angle of 20 relative to a perpendicular to a line (11) connecting the tooth tips (6) of two successively arranged teeth (2, 3).

2. Card wire (1) according to claim 1, characterized by the tooth depth (h) in the first section (8) ₆ ) Is the total height (h) of the steel wire ₁ ) From 10% to 50%.

3. A card wire (1) according to any of the preceding claims, characterized in that the tooth depth (k) at the end of the second section (9) opposite the first section (8) is larger than the tooth depth (h) in the first section (8) ₆ ) 15 to 60 percent smaller.

4. Card wire (1) according to claim 1, characterized in that the tip (6) has a tip face (12) having a length (i) of 0.5mm to 2.0 mm.

5. A card wire (1) according to any of the preceding claims, characterized in that said tooth flank (4) has a working angle (a) of 30 to 50 degrees and said tooth flank (5) has a back angle (γ) of 40 to 60 degrees.

6. Card wire (1) according to any of the preceding claims, characterized in that it has an overall height (h) ₁ ) From 0.5mm to 1.5mm.

7. Card wire (1) according to claim 6, characterized in that a radius (13) of 0.05mm to 0.5mm is configured in the transition from the root flank (7) to the breast flank (4).

8. Card wire (1) according to any one of claims 1 to 5, characterized in that the overall height (h) of the wire ₁ ) From 2.0mm to 5.0mm.

9. Card wire (1) according to claim 8, characterized in that a radius (13) of 0.5mm to 2.0mm is configured in the transition from the root flank (7) to the flank (4).

10. A card wire (1) according to any of the preceding claims, characterized in that a radius (13) of 0.05mm to 0.5mm is configured in the transition from the root flank (7) to the tooth flank (4).

11. Roller of a textile machine, characterized in that a card wire (1) according to any one of claims 1 to 10 is pulled up on the roller.