GARNITURDRAHT

Description

[0001] The present invention relates to a brush wire for rollers of a textile machine. All-steel brushes or brush wires are used in various areas of textile fiber processing. The present invention relates to a brush wire for use on rollers in fiber processing, in particular on carding or carding rollers. When used on rollers, the brush wire is wound onto the roller in the form of a sawtooth all-steel brush, either helically and tightly packed together or in grooves. Common shapes of sawtooth all-steel brushes are specified in the international standard ISO 5234 (2004). According to the standard, all-steel brushes are characterized, among other things, by their working angle α, their back angle γ, their tooth pitch p and tooth depth h6, the overall height of the wire h1, and the length of the tip area I.The working angle is the angle between the pectoral surface of a tooth and the perpendicular to the wire base, where the pectoral surface is the anterior surface of the tooth when viewed in the direction of movement. Alternatively, a line connecting two cusps can be used instead of the wire base. In this case, the working angle is the angle between the pectoral surface of a tooth and the perpendicular to this line. If the pectoral angle α is zero degrees, the pectoral surface is perpendicular to the wire base. The posterior angle γ, in this description, is the angle between the posterior surface and the perpendicular to the wire base or the line connecting the cusps, where the posterior surface is the posterior surface of the tooth when viewed in the direction of movement. If the posterior angle γ is zero degrees, the posterior surface is perpendicular to the wire base.For the purposes of this description, neither the back surface nor the chest surface are necessarily flat surfaces, but can be convex or concave, or provided with grooves or ridges, or be formed from several surfaces angled towards each other, or represent a combination of these forms.

[0002] In fiber processing operations such as opening and cleaning fibers or fiber flakes, the all-steel carding tools and tools used are subject to high demands, particularly regarding efficient parallelization of the fibers during carding or fiber transfer between different rollers without damaging the fibers. A prerequisite for this is that the fibers are guided as close as possible to the surface of the carding tool. The fiber transfer from one roller to the next is also of paramount importance. In the case of a carding machine, this primarily concerns the tool wire applied to the drum. This wire significantly determines the fiber transfer from the feed roller to the drum, the fiber transfer from the drum to the receiving roller, and the fiber guidance during the carding process.

[0003] A variety of designs for tooth liner wires are known from the prior art. For example, CN 105 839 236 A and CN 205 035 530 U disclose a tooth liner wire with a tooth base surface that rises towards the front surface of a tooth. The tooth base surface adjoins the back surface, and the rising shape raises the transition to the front surface of the subsequent tooth relative to the wire base. A similar shape of a tooth base surface, extending from the back surface of one tooth to the front surface of a subsequent tooth, is disclosed in DE 10 2016 114 622 A1. A disadvantage of the disclosed designs is that, due to the continuous rise of the tooth base surface, the fibers to be processed are lifted by the movement of the tooth liner wire without defining a fiber web plane resulting from the fibers.Although the fibers are guided upwards a short distance, they are distributed across the entire rising area of ​​the tooth base. As a result, the fibers to be processed are only partially lifted from the lowest point of the tooth base, which further reduces the efficiency of fiber transfer. Document WO2013 / 072136A1 shows a metallic carding wire comprising an elongated rib section and teeth. The teeth include an anterior segment, a superior segment, and a posterior segment. The anterior segment forms the connection between the tooth and the elongated rib section, and the anterior segment includes a tip that actively picks up fibers during carding.

[0004] The object of the invention is to create a trim wire which enables fiber guidance on the surface of the trim wire by defining a fiber web plane between the lowest point of the tooth base surface and the tooth tips of the trim wire.

[0005] The problem is solved by the features in the characterizing part of the independent claim.

[0006] To solve the problem, a yarn wire for rollers of a textile machine, in particular a carding machine or carding machine, is proposed, with a total height (h1) and with a plurality of teeth arranged one behind the other, each with a tooth depth (hs). Each tooth has a tooth face, a tooth back, and a tooth tip, and the tooth back of a tooth transitions at one end opposite the tooth tip into a tooth base, which subsequently transitions into the tooth face of an adjacent tooth. Starting from the tooth back, the tooth base has a first section and a second section following the first section, the first section being planar or concave and the second section being convex.

[0007] Due to the convex shape of the second section of the tooth base, the fibers are lifted discontinuously over this section. This lifting occurs, due to the convex shape of the tooth base, with a steep incline in the first part and a shallower incline in the second. As a result, the fibers collect in the shallower section and form a fiber web. The majority of the fibers, due to the convex shape of the tooth base, travel over the steeper incline and collect in a fiber web plane located above the lowest point of the tooth base. Fiber transfer is also facilitated because the fibers do not spread over the entire tooth depth but rather collect in this defined fiber web plane. The term "fiber web plane" refers to the radial area of ​​the tooth assembly where the largest proportion of the fibers transported by the tooth assembly wire are located.

[0008] The tooth base surface features a third section following the second section, with the third section being parallel to a line connecting the tips of two consecutively arranged teeth. This third section increases the extent of the portion of the tooth base surface where the fiber web plane is located. This allows the fibers to reach the fiber web plane more easily, as no fiber clogging occurs in the area of ​​the shallow slope in the convexly shaped section of the tooth base surface, even at high production rates. A further advantage is evident in wire manufacturing. Due to the difficulty of positioning the tooth base as close as possible to the wire root to improve filling properties at low tooth heights, the new geometry, thanks to its raised design, allows for a greater distance between the tooth root and the wire root.

[0009] In an alternative embodiment not covered by the claims, the tooth base has a third section following the second section, wherein the third section is arranged at an angle of +20 to -20 degrees, preferably +10 to -10 degrees, to a perpendicular to the line connecting the tips of two consecutively arranged teeth. By arranging the third section in a plane approximately perpendicular to the connecting line, the thickness of the fiber web layer can be defined along the length of this section. This also defines the height at which the fiber web layer is positioned relative to the tooth tip.

[0010] Preferably, the tooth depth in the first section is 10% to 50% of the total wire height. The tooth depth is determined by the intended production volume, the application of the carding wire, and the fiber material being processed. Typically, carding wires for drums used in high-volume cotton applications have a tooth depth of 0.8 mm with a total wire height of 2.5 mm. A tooth depth of less than 10% of the total wire height results in a stiff carding wire that is difficult to apply to a drum. Conversely, a carding wire with a tooth depth greater than 50% of the total wire height becomes soft, and the tooth tips deform due to the stress caused by the fibers and, in particular, the dirt particles adhering to them.

[0011] To enable a significant elevation of the fiber fleece plane towards the tooth tips, the tooth depth at an end of the second section opposite the first section is, according to the invention, 15% to 60%, particularly preferably 20% to 50%, less than the tooth depth in the first section. This makes it possible to lift the majority of the fibers from the tooth base and improve their processing.

[0012] Fiber transfer from one carded element to the next is also more efficient if the fiber web formed from the fibers within the carding wire is not located at the base of the teeth. For example, improved fiber transfer from the drum to the take-off roller in a carding machine increases carding performance because no already carded fibers get caught in the drum carding and thus circulate multiple times. An improvement in carded sliver quality can also be achieved in its parallelization due to a less aggressive transfer of the fibers to the take-off roller. This reduces fiber compression in the take-off roller and also minimizes fiber tearing from the drum carding roller.

[0013] InIn a further development, the tooth tip features a tip surface with a length of 0.5 mm to 2.0 mm. Designing a tooth tip with a tip surface offers advantages in terms of tip wear and the resulting need for re-grinding. With a tooth tip design without a tip surface, a tip surface forms after the first re-grinding due to the process itself. The teeth are re-ground with a grinding roller, which results in the tooth tips becoming flattened. By incorporating tip surfaces from the outset, it can be ensured that the behavior of the fitting wire remains unchanged throughout its lifespan.

[0014] Preferably, the tooth face has a working angle α of 30 to 50 degrees and the tooth back surface a back angle γ of 40 to 60 degrees. Preferably, the overall height of the wire is 0.5 mm to 1.5 mm. Particularly preferably, a radius of 0.05 mm to 0.5 mm is formed in the transition from the tooth base surface to the tooth face surface. Trim wires with geometric shapes in these areas with respect to overall height, working and back angles, and the design of the transitions from one surface to the next are particularly suitable for the rollers of high-performance carding machines. The high-speed rotating rollers of high-performance carding machines form a comparatively thin fiber web on their circumference during fiber processing compared to slower-running machines. Smaller roller diameters are also used, which requires a high degree of flexibility in the trim wires during their assembly.

[0015] In an alternative embodiment, particularly suitable for carding machines, the overall height of the wire is 2.0 mm to 5.0 mm. Preferably, a radius of 0.5 mm to 2.0 mm is formed at the transition from the tooth base to the tooth face in this embodiment. Wire teeth with geometric shapes in these areas, with respect to overall height and the design of the transitions from one surface to the next, are particularly suitable for carding rollers, which tend to rotate slowly and have larger diameters than the rollers of carding machines.

[0016] The trim wire is made of all-steel wire and can be supplied with a normal, locked or linked foot to allow mounting on a smooth roller or in grooves.

[0017] The trim wire is suitable for rollers of textile machines, and in particular for trimmed rollers of carding machines, such as drums. When used on a roller, the trim wire is wound in a spiral.

[0018] The invention will now be explained using exemplary embodiments and illustrated in more detail by drawings. Figure 1 Schematic representation of a first embodiment of a garment wire that does not fall under the claims; Figure 2 Schematic representation of a second embodiment of a garment wire according to the invention; Figure 3 Schematic representation of a third embodiment of a garment wire that does not fall under the claims; Figure 4 Schematic representation of a cross-section at point X of the Figure 2

[0019] Figure 1Figure 1 shows a schematic representation of an embodiment of a wire assembly 1 that is not covered by the claims. The depicted section of a wire assembly 1 shows a wire base 14 and, on the opposite side, teeth 2, 3 arranged one behind the other in a longitudinal direction 15. When the wire assembly 1 is moved, the fibers 16 are transported along its longitudinal direction 15 by the teeth 2, 3. The teeth 2, 3 are arranged regularly and identically in shape along the wire assembly 1. The wire assembly 1 has a total height h1, and the teeth have a tooth depth h6. The tooth depth h6 extends from a tooth tip 6 to the lowest point of a tooth base 7.

[0020] Each tooth 2, 3 has a tooth tip 6. The tooth tip 6, together with its front surface of the tooth 2, 3, forms the so-called breast surface 4. The breast surface 4 is inclined at a working angle α relative to the perpendicular to the wire base 14, or to a connecting line 11 between two adjacent tooth tips 6. A back surface 5, inclined at a back angle γ relative to the perpendicular to the wire base 14, or to a connecting line 11 between two adjacent tooth tips 6, is arranged opposite the breast surface 4.

[0021] InIn the direction from a first tooth 2 to a second tooth 3, starting at the tip 6 of the first tooth 2, the back surface 5 extends inclined towards the wire base 14 and transitions into a tooth base surface 7. The tooth base surface 7, in turn, connects at its end furthest from the back surface 5 to the breast surface 4 of the second tooth 3. The breast surface 4, in turn, leads to the tip 6 of the second tooth 3. The tooth base surface 7 has a first section 8, which, in the illustrated embodiment, runs parallel to the connecting line 11 in a plane and then transitions into a second section 9. The second section 9 has a convex shape that terminates at the breast surface 4 of the second tooth 3. The tooth depth h 6 in the first section 8 decreases to tooth depth k in the second section.The convex shape of the tooth base surface 7 in the second section 9 results in a discontinuous decrease in tooth depth h1 from the first section 8 to the end of the second section 9, such that the decrease increases sharply at the beginning of the second section 9 and decreases again towards the end. Neither the increase nor the decrease in the reduction is continuous, which contributes to the formation of a fiber web plane 17 in the area of ​​a transition from the second section 9 of the tooth base surface 7 to the breast surface 4. The transitions from the back surface 5 to the first section 8 of the tooth base surface 7, as well as from the first section 8 to the second section 9 and from the second section 9 to the breast surface 4, are shown with rounded edges. For fiber processing, the most important transition is the connection between the tooth base surface 7 and the breast surface 4, which is designated with a radius 13.

[0022] In a second and third embodiment according to the Figures 2 , 3 and 4 are for the same features as in Figure 1 The same reference numbers were used. Subsequently, the specific design of the garment wire 1 is described in contrast to the embodiment according to... Figure 1 described and refrained from repeating the description.

[0023] The second embodiment according to the Figure 2 differs from the first embodiment according to the Figure 1The first section 8 of the tooth base surface 7 has a concave shape. A third section 10 adjoins the second section 9 of the tooth base surface 7, subsequently transitioning into the breast surface 4 of the following tooth 3. The third section 10 is arranged parallel to the connecting line 11, allowing a fiber web layer 17 to form on this section 10 of the tooth base surface 7. Additionally, the tooth tip 6 is formed with a tooth tip surface 12 of length l.

[0024] The third embodiment according to the Figure 3 It does not fall under the claims and differs from the first embodiment according to the Figure 1The first section 8 of the tooth base surface 7 has a concave shape. A third section 10 adjoins the second section 9 of the tooth base surface 7, subsequently transitioning into the breast surface 4 of the following tooth 3. The third section 10 is arranged at an angle to the connecting line 11 of the tooth tips 2 and 3. The angle is chosen such that the orientation of the third section 10 of the tooth base surface is perpendicular or at least nearly perpendicular to the connecting line 11. This shape creates a kind of pocket in which the fiber web plane 17 is formed.

[0025] Figure 4 shows a schematic representation of a cross-section at point X of the Figure 3The toothing wire 1 has a total height h1 from the wire base 14 to the tooth tip 6 and a tooth depth h6 from the tooth base 7 to the tooth tip 6. The toothing wire 1 is tapered in the section from the wire base 14 to the tooth tip 6 where the teeth are formed. The toothing wire 1 has a width b1 at the wire base 14 and a width b3 at the tooth tip 6. The present invention is not limited to the illustrated and described embodiments. Modifications within the scope of the claims are possible. legend

[0026] 1 Set wire 2 Tooth 3 Tooth 4 Tooth facet 5 Tooth back surface 6 Tooth tip 7 Tooth base 8 First section of the tooth base 9 Second section of the tooth base 10 Third section of the tooth base 11 Connecting line between two adjacent tooth tips 12 Tooth tip surface 13 Radius 14 Wire base 15 Longitudinal direction 16 Fiber 17 Fiber fleece plane α Working angle γ Back angle of the first tooth tip h 1 Total height of the wire h 6 Tooth depth b 1 Wire width b 3 Tooth tip width k Tooth depth l Length of tooth tip surface

Claims

1. Card clothing wire (1) for rollers of a textile machine having a total height (h1) and having a plurality of successively arranged teeth (2, 3) having a tooth depth (h6), each tooth (2, 3) having a tooth front surface (4), a tooth back surface (5) and a tooth tip (6), and the tooth back surface (5) of a tooth (2) merging into a tooth base surface (7) at an end opposite the tooth tip (6), which tooth base surface subsequently merges into the tooth front surface (4) of an adjacent tooth (3), and the tooth base surface (7), starting from the tooth back surface (5), having a first portion (8) and a second portion (9) following the first portion (8), the first portion (8) having a flat or concave shape and the second portion (9) having a convex shape, characterized in that the tooth base surface (7) has a third portion (10) following the second portion (9), the third portion (10) being arranged parallel to a connecting line (11) of the tooth tips (6) of two successively arranged teeth (2, 3), characterized in that a tooth depth (k) at an end of the second portion (9) opposite the first portion (8) is 15% to 60% less than the tooth depth (h6) in the first portion (8).

2. Card clothing wire (1) according to claim 1, characterized in that the tooth depth (h6) in the first portion (8) is 10% to 50% of the total height of the wire (h1).

3. Card clothing wire (1) according to claim 1, characterized in that the tooth tip (6) has a tooth tip surface (12) having a length (l) of 0.5 mm to 2.0 mm.

4. Card clothing wire (1) according to any of the preceding claims, characterized in that the tooth front surface (4) has a working angle (α) of 30 to 50 angular degrees, and the tooth back surface (5) has a back angle (γ) of 40 to 60 angular degrees.

5. Card clothing wire (1) according to any of the preceding claims, characterized in that the total height of the wire (h1) is 0.5 mm to 1.5 mm.

6. Card clothing wire (1) according to claim 5, characterized in that a radius (13) of 0.05 mm to 0.5 mm is formed in a transition from the tooth base surface (7) to the tooth front surface (4).

7. Card clothing wire (1) according to any of claims 1 to 4, characterized in that the total height of the wire (h1) is 2.0 mm to 5.0 mm.

8. Card clothing wire (1) according to claim 7, characterized in that a radius (13) of 0.5 mm to 2.0 mm is formed in a transition from the tooth base surface (7) to the tooth front surface (4).

9. Card clothing wire (1) according to any of claims 1 to 4 or according to claim 7, characterized in that a radius (13) of 0.05 mm to 0.5 mm is formed in a transition from the tooth base surface (7) to the tooth front surface (4).

10. Roller of a textile machine, characterized in that a card clothing wire (1) according to any of claims 1 to 9 is mounted on the roller.