Card wire, closing carrier and carding machine

Abstract

The card wire of the present invention comprises a base portion and a blade portion. The height of the blade is greater than the height of the base portion. The blade portion has a plurality of identical tooth bodies. The tooth bodies extend longitudinally between two first recesses of the blade portion and extend up to the height towards the base portion. The plurality of tooth bodies are arranged at pitch intervals in the longitudinal direction. A first tooth tip and at least one second tooth tip are provided on each tooth body. The first tooth tip is adjacent to the first recess and faces in the direction of the first recess. All first and second tooth tips face in the same direction. The card wire is characterized in that, in each tooth body, the first tooth tip and the second tooth tip furthest from the first tooth tip are arranged in the tooth tip space at a spacing of less than 50% of the pitch.

Description

Technical Field

[0001] The present invention relates to a card wire for a closing carrier of a carding machine, a closing carrier, and a carding machine. The closing carrier is, for example, a roller, a revolving top bar, or a stationary flat bar. In a carding machine such as a card for yarn production or a comber for non-woven fabric production, various types of rollers such as a ricker-in roller, a cylinder, a worker roller, a transfer roller, or a take-off roller are used, and each can be provided with a card wire having a greatly different shape.

Background Art

[0002] Regarding the cylinder of a card, for example, a card wire in which several tooth tips are arranged on a tooth body is known (EP3323917A1 or CN112458575A).

[0003] FR1493015A and JP-A-08-074132 disclose a card wire in which several tooth tips are arranged on a tooth body in different directions.

[0004] EP3168336A1 and DE4436378A1 disclose that the second tooth tip is arranged far below the first tooth tip in the height direction.

[0005] DE102008027355A1 discloses a take-off roller having a high ppsi. WO00 / 26450, EP2567010B1, and EP2756119A1 disclose a card wire having an undercut that makes it easy to hold fibers on the tooth surface.

[0006] WO03087446A2 and DE1927049A1 disclose a card wire in which a plurality of tooth tips are arranged at a uniform distance, and the tooth depth between consecutive tooth tips is alternating or different.

Summary of the Invention

Problems to be Solved by the Invention

[0007] Based on prior art, the present invention aims to provide a card wire that exhibits a high carding effect, is resistant to wear, has a large space for fibers, and offers high tooth stability. [Means for solving the problem]

[0008] This objective is achieved by the card wire, closing carrier and carding machine described in claims 1, 13 and 14 of this application.

[0009] The card wire of the present invention has a base portion whose lower end, located at one end in the height direction of the card wire, is positioned on the surface of the closing carrier of a carding machine. The closing carrier of a carding machine, such as a card or comber, is, for example, a roller, a bar on a revolving top, or a bar on a stationary flat. The card wire is naturally wound helically on a roller, but can also be arranged linearly on a bar. In particular, to enable the description of the shape of the teeth of the card wire, we assume that the card wire is linear, but we are not limited to this specification. Therefore, in principle, the longitudinal direction of the card wire is the direction in which a linear card wire extends indefinitely. The teeth extend from the base portion in the so-called height direction, which is perpendicular to the longitudinal direction and perpendicular to the lower side of the base portion, and the base portion is a plane that exists when the card wire is linear. The third vertical spatial direction is referred to as the width direction. The base portion can, for example, be a support for adjacent windings of the same wire on its outer side surface facing the width direction. Here, a rectangular or interlocked base portion is advantageous. The base portion can be wider than the blade portion, thereby creating the necessary passages for the fibers in the width direction between teeth. The base portion has height at the bottom in the height direction.

[0010] The card wire of the present invention has a blade portion where the lower, opposite end of the card wire in the height direction is formed. The blade portion may be narrower than the base portion, and it is advantageous for it to narrow upwards in the width direction. The height of the blade portion is in the height direction. The sum of the blade height and the base height can be the total height of the card wire. The boundary line between the blade portion and the base portion is as follows: In the case of a non-interlocked rectangular base portion, the base portion ends upwards at the point where the extension of the card wire begins to decrease in the width direction. In the case of an interlocked base portion, the base portion may end upwards on a plane parallel to the lower side of the base portion. The upper end of the base portion can be set according to the function of the base portion already outlined. The width of the blade portion increases toward the base portion, with the rate of increase toward the base portion being smaller and more linear near the tooth tip, but the increase toward the maximum width becoming more rapid near the base portion. The base portion can start from the point where the blade portion is at its maximum width.

[0011] The blade height of the card wire of this invention is greater than the height of the base. This creates deep tooth grooves in the blade portion, forming a large space that can accommodate a large number of fibers. On the other hand, a base portion suitable for spiral winding on a roller is formed.

[0012] The blade portion of the card wire of the present invention is made up of a plurality of identical tooth bodies arranged sequentially in the longitudinal direction. By definition, the tooth bodies extend longitudinally between two first recesses of the blade portion, and the first recesses extend up to the height direction toward the base portion. The recess that does not extend toward the base portion as much as the first recesses is defined as the recess with the greatest depth and is referred to as the second recess. The plurality of tooth bodies are arranged apart from each other in the longitudinal direction at pitch intervals. The distance defined as the pitch can be 1.3 mm to 5.5 mm, preferably 1.5 mm to 4 mm, and more preferably 1.8 mm to 3.5 mm. Therefore, the plurality of first recesses are arranged apart from each other at pitch intervals.

[0013] A first tooth tip and at least one second tooth tip are positioned in each tooth body of the card wire of the present invention. The first tooth tip is adjacent to the first recess and faces in the direction of the first recess. It is advantageous that all first and second tooth tips face the same direction. It is advantageous that this direction has components in the longitudinal direction. For example, all first and second tooth tips face either in the longitudinal direction or in the opposite direction to the longitudinal direction.

[0014] The card wire of the present invention is characterized in that, on each tooth body, a first tooth tip and the second tooth tip furthest from the first tooth tip are arranged longitudinally with a spacing of less than 50%, preferably less than 45%, more preferably less than 40%, and most preferably less than 35% of the pitch between the tooth tips. When two or more second tooth tips are arranged on one tooth body, the spacing between the tooth tips is determined by the longitudinal distance between the first tooth tip of this tooth body and the second tooth tip of the tooth body furthest from the first tooth tip of this tooth body.

[0015] Placing a second tooth tip on a single tooth body increases the number of effective tooth tips. This enhances the carding effect in terms of fiber opening and separation associated with an increased number of tips (ppsi). This improves the quality of fleece and thread. The increased number of tips reduces wear on each tip, resulting in a longer service life for the card wire. Simultaneously, placing a second tooth tip on a single tooth body eliminates the need to add a tooth body to the second tip. This allows for tooth body stability without significantly reducing the space available for fibers between tooth bodies (e.g., longitudinal width). Increasing the number of tips (ppsi) by reducing the pitch brings the distance between tooth bodies closer, compromising stability or reducing space for fibers. Increasing the fiber space by increasing the tooth cut depth reduces tooth body stability and makes fiber release from very deep tooth cuts more difficult. Conventional methods for customizing card wires cannot achieve the synergistic effects of the present invention. When the card wire of the present invention is used in a worker or doffer roller, the improved carding performance (fiber opening and separation, i.e., "parallelization") increases the transfer ratio from the cylinder without compromising quality. In particular, the latter advantage cannot be inferred from known disclosures regarding double-toothed card wires for cylinder rollers and is not apparent from the aforementioned constraints on customizing card wires that require a large space for the fibers. Further advantages arise in the manufacture of thin nonwoven fabrics, because they are supported by a greater number of tips at more contact points, resulting in a more uniform structure.

[0016] The first tooth surface may be formed on the tooth body of the card wire by the surface of the tooth body adjacent to the first recess of the tooth body. At least in the first tip portion adjacent to the first tooth tip, the first tooth surface may be inclined toward the base portion or extended perpendicular to the longitudinal direction. This causes the first tooth surface to form a first working angle that is acute with respect to the height direction when viewed in the width and height directions perpendicular to the longitudinal direction. In this specification, angles between 0° and 90° are understood as acute. The tooth body may be bounded on the opposite side of the tooth surface by a tooth back surface. The tooth back surface, together with the adjacent tooth surface of the subsequent tooth body, demarcates the space of the fiber to be processed. When the spacing of the tooth tips is less than, for example, 50%, 45%, 40%, or 35% of the pitch, tooth bodies with gently sloping tooth back surfaces can be arranged. This makes it easier to extract fibers from the space of the recess. It is advantageous here that the minimum back angle of the tooth back surface is 25° to 80° or 35° to 70° with respect to the height direction. It is advantageous that the minimum angle of the tooth posterior surface with respect to the height direction is 30° to 85° or 40° to 80°, and it is particularly advantageous that it is the upper half of the tooth posterior surface or the upper one-third of the tooth posterior surface with respect to the first tooth depth. The tooth posterior surface can curve downward in the height direction and transition to the first or second tooth root. The tooth posterior surface can curve upward in the height direction and transition to the first or second tooth tip. The tooth posterior surface can be straight between the upward and downward transitions. Between the upward and downward transitions, the tooth posterior surface may be divided into two straight sections. In such a design, the posterior angle of the portion closer to the first or second tooth tip is greater than the posterior angle of the portion closer to the first or second tooth root.

[0017] The second tooth surface may be formed on the tooth body of the card wire by the surface of the tooth body adjacent to the second recess of the tooth body. At least at the second tip adjacent to the second tooth tip, the second tooth surface may be inclined toward the base or extend perpendicular to the longitudinal direction. This causes the second tooth surface to form a second working angle that is acute with respect to the height direction when viewed in the width and height directions perpendicular to the longitudinal direction. The first tip can extend linearly. The second tip can extend linearly. All first and second tooth tips face the same direction. It is advantageous that each first tooth tip is adjacent to a first tooth surface inclined toward the base. It is advantageous that each second tooth tip is adjacent to a second tooth surface inclined toward the base. Since the first and / or second tooth tips are thin, it is advantageous that, for example, no plateau is formed on the first and / or second tooth tips, or that no plateau extending more than 0.1 mm longitudinally is formed.

[0018] The first working angle can be 0° to 60°, preferably 20° to 60°, and more preferably 20° to 55°. The second working angle can be measured at the tip of each second tooth surface. The second working angle can be 0° to 60°, preferably 20° to 60°, and more preferably 20° to 55°.

[0019] The first tooth surface may have a first undercut extending downward adjacent to the first tip, the first undercut having a first undercut angle that is acute in the height direction and greater than the first working angle of the adjacent first tip. The first tooth surface having such a first undercut can better retain fibers in its recess. The angle in the height direction is greater in the first undercut than in the adjacent portion of the first tooth surface above or below the first undercut. The extension of the first undercut can be as small as 0.1 mm. The first tip may be linear when viewed in the width direction. The first undercut may be linear or partially linear when viewed in the width direction. The first undercut may be twisted and integrated into the first tip when viewed in the width direction, taking manufacturing tolerances into consideration. When viewed in the width direction, the first undercut may be rounded and integrated into a portion of the first tooth surface closer to the first tooth root. The radius of curvature is at least 0.14 mm, at least 0.15 mm, and at least 0.18 mm or greater.

[0020] The second tooth surface may have a second undercut extending downward adjacent to the second tip, the second tip having a second undercut angle that is acute in the height direction and greater than the second working angle of the adjacent second tip. A second tooth surface having such a second undercut can better retain fibers in the space of the second recess. The angle in the height direction is greater than the angle in the second undercut than the angle in the adjacent portion of the second tooth surface above or below the second undercut. The extension of the second undercut can be as small as 0.1 mm. The second tip may be linear when viewed in the width direction. The second undercut may be linear or partially linear when viewed in the width direction. The second undercut may be twisted and integrated into the second tip when viewed in the width direction, taking manufacturing tolerances into consideration. When viewed in the width direction, the second undercut may be rounded and integrated into a portion of the second tooth surface closer to the second tooth root. The radius of curvature is at least 0.14 mm, at least 0.15 mm, and at least 0.18 mm or greater.

[0021] The first tooth surface may have one or more further undercuts below the first tip in the height direction, each of which has a larger undercut angle than the middle portion of the first tooth surface adjacent to the first undercut in the direction toward the first tooth tip. This can enhance the force that holds the fibers in the recess space. The acute first undercut angle of the first undercut and / or the acute second undercut angle of the second undercut and / or the acute undercut angle of the further undercuts may be 50° to 90°. The acute first undercut angle of the first undercut and / or the acute second undercut angle of the second undercut and / or the acute undercut angle of the further undercuts may be 80° to 90°. The acute first undercut angle of the first undercut and / or the acute second undercut angle of the second undercut and / or the acute undercut angle of the further undercuts may be 60° to 80°. The acute first holding angle of the first undercut and / or the acute second undercut angle of the second undercut and / or the acute undercut angle of any further undercut may be 50° to 60°.

[0022] The first recess of the blade portion may have a first tooth root, which is the point of the first recess closest to the base portion in the height direction. The tooth body may have a first tooth depth that corresponds to the height distance from the first or second tooth tip at the highest point of the tooth body to the first tooth root, and is less than or equal to the height of the blade. The first tooth depth can be greater than the difference between the total height and the depth of the first tooth. The first tooth depth can be greater than or equal to the height of the root. The first tooth depth can be 1 mm to 4 mm, preferably 1.4 mm to 3.3 mm. A larger first tooth depth is advantageous for obtaining a sufficiently large space for fibers. In this case, the minimum dimension of the first tooth depth is particularly important for the effective space for fibers. For cylinder rollers, especially for card wires used in yarn production, the first tooth depth is often 0.7 mm or less. Such small first tooth depths are not suitable for use in working or takeoff rollers with a small space for fibers because a shallow first tooth depth cannot reliably form a fleece of sufficient weight.

[0023] When viewed in the width direction, the fiber space of the card wire is formed by the region of the first recess on the accommodating space boundary line, which extends parallel to the longitudinal direction away from the first tooth root. The distance between the accommodating space boundary line and the first tooth root can be 40% to 60% of the first tooth depth, for example, 50% of the first tooth depth. The fiber space may also include the region of one or more second recesses. The region of the fiber space may be larger than the adjacent tooth body portion region on the accommodating space boundary line.

[0024] The height distance from the first tooth root to the first tooth tip, or the height distance from the first tooth root to the second tooth tip, can be varied between 0% and 30% or 0% and 20% of the first tooth depth, preferably between 0% and 10%. This ensures that the first and second tooth tips are positioned at different heights on the tooth body. As a result, the carding effect and the wear of the first and second tooth tips are mutually adjusted and optimized.

[0025] The second tooth depth in the height direction of each second recess adjacent to the second tooth tip and facing the second tooth tip can be 0.5% to 50% or 0.5% to 30%, or 0.5% to 20% of the first tooth depth. The second tooth depth can be determined in the height direction. The second tooth depth is the distance from the deepest point of the second recess closest to the base portion to the second tooth tip adjacent to the second recess in question.

[0026] The width of the bottom measured in the width direction at the base portion can be 0.5 mm to 3.5 mm, preferably 0.65 mm to 1.3 mm. The base portion may be of an interlock or non - interlock type in all card wires of the present invention.

[0027] The card wire of the present invention is preferably suitable for being stretched on a take - off and / or worker roller. The card wire of the present invention is preferably suitable for being stretched on a ricer in roller. The card wire of the present invention is preferably suitable for being stretched on a corner cylinder. The card wire of the present invention is preferably mounted on a take - off and / or worker roller. The card wire of the present invention is preferably mounted on a ricer in roller. The card wire of the present invention is preferably mounted on a corner cylinder.

[0028] The closing carrier of the present invention comprises the card wire of the present invention. The closing carrier, for example, a roller, a revolving top bar, or a stationary flat bar, can carry a card wire or other carding elements (e.g., flexible closing) outside the carding machine and be transported to and attached to the carding machine. In particular, it is also possible to equip a roller attached to the machine. In any case, in this specification, the closing carrier is also referred to as an equipped closing carrier, that is, a unit comprising a closing carrier and a closing (card wire, flexible closing, etc.). The carding machine of the present invention comprises the closing carrier of the present invention. The closing carrier of the carding machine of the present invention may be a worker roller and / or a take-off roller of the carding machine. The carding machine may be a card or a comber. The closing carrier of the present invention can be advantageously used on any type of carding machine. The following drawings and examples of this embodiment are limited to the description of the card wire of the present invention. To explain the structure and function of the closing carrier and the carding machine, reference is made to the above-mentioned prior art or "The Rieter Manual of Spinning" (Werner Klein, 2014) or "Handbook of Nonwovens" (S.J. Russell, 2007). [Brief Description of Drawings] Figure 1 Figure 1 shows a schematic view in the width direction of the card wire of the present invention for a worker or take-off roller. Figure 2 Figure 2 shows a schematic view in the width direction of the card wire of the second embodiment of the present invention for a worker or take-off roller. Figure 3 Figure 3 shows a schematic view in the width direction of the card wire of the present invention for a licker-in roller. Figure 4 Figure 4 shows a schematic view in the width direction of the card wire of the second embodiment of the present invention for a licker-in roller. Figure 5 Figure 5 shows a schematic view in the width direction of the card wire of the present invention for a card cylinder. Figure 6 shows the upper part of the tooth body of the card wire of the present invention. Figure 7 shows the upper part of the tooth body of a card wire according to a further embodiment of the present invention. Figure 8 shows the upper part of the tooth body of a card wire according to a further embodiment of the present invention. [Modes for carrying out the invention]

[0029] Figure 1 shows a symbolic diagram of the card wire 1 of the present invention for a worker or takeoff roller in the width direction z. The card wire 1 has a base portion 2 at the bottom, shown in the height direction y in Figure 1. Four teeth 7 arranged on the blade portion 5 are illustrated on the base portion 2. A cross-sectional view of the card wire 1 is shown longitudinally x with respect to the right side of the plane in the width direction z, with respect to the four teeth 7. The cross-section shows the width direction z, the width of the bottom 24, and the lower side 3 of the base portion 2, as with the left side plane, and the card wire 1 together with the base portion 2 is positioned on the closing carrier. It is clear that the base portion 2 is not interlocked and mounted on the closing carrier. It is clear that the blade height 6 is greater than the height 4 of the bottom in both the left side plane and the right side cross-section. In this regard, the following explanation is the same for Figure 1 and all other figures, however all figures are symbolic in that some details are not shown or are simplified (for example, the recesses 8, 23 of the blade portion 5 are not shown in the cross-sectional view). On the other hand, the diagram is generally accurate, and distances and angles can be determined at least generally from the diagram by observing the corresponding scale (especially taking into account the limited resolution). The tooth body 7 shown in Figure 1 has a first tooth tip 10 and exactly one second tooth tip 11. The first tooth tip 10 and the first tooth surface 13 are adjacent to a first recess 8 that extends very close toward the base portion 2 in the height direction y. The tooth bodies 7 are spaced apart in the longitudinal direction x at intervals of pitch 9 and are separated from each other by the first recess 8. Since the first recess 8 is considerably deeper than the second recess 23, four tooth bodies 7 separated by the first recess 8 that extends maximally toward the base portion 2 are clearly shown in Figure 1. The first tooth tip 10 and the second tooth tip 11 of the tooth body 7 are spaced apart from each other by a tooth tip space 12. It is clear that the tooth tip space 12 is less than 50% of the pitch 9. The first tooth tip 10 is oriented toward the first recess 8. The tip of the second tooth 11 is facing the direction of the second recess 23. The depth of the first tooth 20 is indicated by an auxiliary line connecting the two roots 21 of the first tooth.

[0030] Figure 1 shows a harbor space boundary line 25 extending in the height direction y to approximately 50% of the first tooth depth 20 in the third first recess 8 from the left and the fourth tooth body 7 from the left. The area of ​​the first recess 8 on the harbor space boundary line 25 (harbor space 26) is indicated by a diagonal line running from the lower left to the upper right. The area of ​​the (fourth) tooth body 7 on the harbor space boundary line 25 (tooth body area 27) is indicated by a diagonal line running from the upper left to the lower right. It is clear that the area of ​​harbor space 26 is larger than the tooth body area 27. The area of ​​the second recess 23 (between the first tooth tip 10 and the second tooth tip 11) can be included within the harbor space 26. The area of ​​harbor space 26 that is larger than the tooth body surface 27 is advantageous for all card wires 1 of the present invention, even if it is only indicated by the diagonal line corresponding to Figure 1. The position of the harbor space boundary line 25 in the height direction y can be located in all areas of all card wires of the present invention (i.e., all figures including Figure 1).

[0031] Figure 2 shows a symbolic diagram of the width direction z of a card wire 1 of a second embodiment of the present invention for a worker or takeoff roller. The above description of the characteristics of the card wire 1 shown in Figure 1 also applies to Figure 2 and will not be repeated here. The card wire 1 shown in Figure 2 and the card wire 1 shown in Figure 1 differ not only in quantitative dimensions of differing individual characteristics, but also in the presence of exactly one first undercut 16 and exactly one other undercut 18 located on the tooth surface 13 of the tooth body 7. A first tip portion 14 is located on the height direction y of the first undercut 16, extending linearly in the height direction y at a first working angle 15. The first undercut 16 also extends at least partially linearly in the height direction y at a first undercut angle 17 greater than the first working angle 15. The further undercut 18 also extends at least partially linearly in the height direction y at an undercut angle 17 greater than the angle with respect to the height direction y to which the intermediate portion 19 located at a higher position extends. The undercut angle 17 of the further undercut 18 is also greater than the angle read below the further undercut 18 as the tooth surface 13 is moving downwards. For clarity, the first undercut angle 17 of the first undercut 16 and the first working angle 15 of the first tip 14 are shown in the enlarged view of the tooth body in the upper right of Figure 2.

[0032] Figure 3 shows a symbolic widthwise diagram of the card wire of the present invention for riccar in rollers. The above description of the characteristics of the card wire 1 shown in Figure 1 also applies to Figure 3 and will not be repeated here. The card wire 1 shown in Figure 3 and the card wire 1 shown in Figure 1 differ not only in their quantitative dimensions and individual characteristics, but also, in particular, in the cross-section shown on the right, they are equipped with a base portion 2 provided for the interlocked arrangement of the card wires 1. The card wire can have the following dimensions: The bottom height 4 is 1.5 mm. The bottom height 4 can be 1 mm to 2.2 mm in all card wires 1 of the present invention. The blade height 6 is 3.5 mm. The blade height 6 can be 2 to 4 mm in all card wires 1 of the present invention. The pitch 9 is 2.7 mm. The pitch 9 can be 1.5 mm to 5.5 mm in all card wires 1 of the present invention. The tooth tip space 12 is 0.75 mm. The tooth tip space 12 can be 0.6 mm to 2.7 mm in all card wires 1 of the present invention. The first working angle 15 is 20°. The first working angle 15 can be 0° to 60° in all card wires 1 of the present invention. The first tooth depth 20 is 2.5 mm. The first tooth depth 20 can be 1 mm to 4 mm in all card wires 1 of the present invention. The second tooth depth 22 is 0.5 mm. The width of the base 24 is 2.12 mm.

[0033] Figure 4 shows a symbolic widthwise diagram of a card wire of a second embodiment of the present invention for a ricker in roller. The card wire 1 shown in Figure 4 is essentially different from the card wire 1 shown in Figure 3 in terms of the following dimensions: the tooth tip space 12 is 0.6 mm and the first working angle 15 is 15°.

[0034] Figure 5 shows a symbolic widthwise diagram of the card wire of the present invention for a comber cylinder. The above description of the characteristics of card wire 1 shown in Figure 1 also applies to Figure 5 and will not be repeated here. Card wire 1 shown in Figure 5 differs from card wire shown in Figure 1 and other figures in that, in addition to the quantitative dimensions of the individual characteristics being different, it has a first tooth tip 10 and a second tooth tip 11 whose height y-distance from the first tooth root 21 is not the same. The second tooth tip 11 is higher, which means that the first tooth depth 20 is measured between the first tooth root 21 and the second tooth tip 11. The card wire may have the following dimensions: The root height 4 is 1.15 mm. The blade height 6 is 1.35 mm. The pitch 9 is 1.8 mm. The tooth tip space 12 is 0.44 mm. The first working angle 15 is 35°. The first tooth depth 20 is 1.1 mm. The second tooth depth 22 is 0.3 mm. The width of the base, 24, is 0.9 mm.

[0035] Figure 6 shows the upper part of the tooth body 7 of the card wire 1 of the present invention. The tooth body 7 shown in Figure 6 basically corresponds to the tooth body 7 shown in Figure 2. In the enlarged view of Figure 6, the tip portion 14 located above the first tooth tip 10 and the first undercut 16 can be seen on the left side. The first working angle 15 of the first tip portion 14 is also shown. It is clear that the first tip portion 14 is more longitudinally inclined in the upper region adjacent to the first tooth tip 10 than in the lower region adjacent to the first undercut 16. Similarly, the second tooth tip 11 also has an upper region adjacent to the tooth tip 11, which is more longitudinally inclined in x than in the lower region adjacent to the second tooth root at the second working angle 29. The more inclined region of the first tooth tip 10 and / or the second tooth tip 11 is advantageous for all card wires 1 of the present invention. The more inclined region is limited and may be, for example, 0.1 mm or 0.05 to 0.3 mm along the height direction y.

[0036] Figure 7 shows the upper part of the tooth body 7 of another card wire 1 of the present invention. The tooth body 7 comprises a first tip 14, a first undercut 16, and a further undercut 18, arranged from top to bottom on the left side. The tooth body 7 further comprises a first tooth tip 10 and two second tooth tips 11. To clearly define the distance 12 between the tooth tips, the distance 12 is defined and illustrated as the distance between the first tooth tip 10 and the second tooth tip 11 of the tooth body 7 furthest from the first tooth tip 10. The dorsal angle 28 is indicated by a reference numeral at the right end of Figure 7 for clarity.

[0037] Figure 8 shows the upper part of the tooth body 7 of the further card wire 1 of the present invention. The tooth body 7 comprises a first tip 14, a first undercut 16, and a further undercut 18, arranged from top to bottom on the left side. The tooth body 7 further comprises a first tooth tip 10 and a second tooth tip 11. Furthermore, the second tooth surface 30 of the tooth body 7 comprises a second tip 31 and a second undercut 32. The second undercut angle 33 of the second undercut 32 of the second tooth surface 30 is greater than the second working angle 29 of the directly adjacent second tip 31 of the second tooth surface 30. [Explanation of symbols] 1 Card wire, 2 Base section, 3 Underside of base section (2), 4 Height of bottom, 5 Blade section, 6 Blade height, 7 Tooth body, 8 First recess, 9 Pitch, 10 First tooth tip, 11 Second tooth tip, 12 Tooth tip space, 13 First tooth surface, 14 Tip, 15 First working angle, 16 First undercut, 17 Undercut angle, 18 Further undercut, 19 Intermediate section, 20 First tooth depth, 21 First tooth root, 22 Second tooth depth, 23 Second recess, 24 Width of bottom, 25 Enclosure boundary line, 26 Enclosure space, 27 Tooth body surface, 28 Back angle, 29 Second working angle, x Longitudinal direction, y Height direction, z Width direction

Claims

1. A card wire (1) for the closing carrier of a carding machine, The card wire (1) has a base portion (2) having a bottom height (4) in the height direction (y), with the lower end (3) located at one end of the card wire (1) positioned on the surface of the closing carrier. The end of the card wire (1) opposite to the lower side (3) in the height direction (y) is positioned and has a blade portion (5) having a blade height (6) in the height direction (y), The height of the blade (6) is greater than the height of the base (4). The blade portion (5) comprises a plurality of identical tooth bodies (7) that are continuous in the longitudinal direction (x), The tooth body (7) extends longitudinally between the two first recesses (8) of the blade portion (5), and the first recesses (8) extend to the base portion (2) up to the height direction (y). The plurality of tooth bodies (7) are arranged with a pitch (9) in the longitudinal direction (x), A first tooth tip (10) and at least one second tooth tip (11) are arranged on each tooth body (7). The first tooth tip (10) is adjacent to the first recess (8) and is oriented toward the first recess (8), and the first tooth and the second tooth tips (10, 11) are all oriented in the same direction. A card wire (1) characterized in that each tooth body (7), the first tooth tip (10), and the second tooth tip (11) furthest from the first tooth tip (10) are arranged longitudinally (x) in the tooth tip space (12), and the tip space (12) is less than 50% of the pitch (9), preferably less than 45%, more preferably less than 40%, and most preferably less than 35%.

2. The card wire (1) according to claim 1, The first tooth surface (13) of the tooth body (7) is formed by the surface of the tooth body (7) adjacent to the first recess (8) of the tooth body (7), and at least at the tip portion (14) adjacent to the first tooth tip (10), it is inclined toward the base portion (2) or extends perpendicular to the longitudinal direction (x), and the first tooth surface (13) extends at a first working angle (15) that is acute in the height direction (y) when viewed in the width direction (z) and height direction (y) perpendicular to the longitudinal direction (x), characterized in that the first tooth surface (13) is formed by the surface of the tooth body (7) adjacent to the first recess (8) of the tooth body (7), and at least at the tip portion (14) adjacent to the first tooth tip (10), it is inclined toward the base portion (2) or extends perpendicular to the longitudinal direction (x).

3. The card wire (1) according to claim 2, The card wire (1) is characterized in that the first working angle (15) is 0° to 60°, preferably 20° to 60°, and more preferably 20° to 55°.

4. A card wire (1) according to claim 2 or 3, A card wire (1) characterized in that the first tooth surface (13) adjacent to the first tip portion (14) has a first undercut (16) extending in the height direction (y) at a first undercut angle (17) that is sharper than the first working angle (15) of the adjacent first tip portion (14), and / or the second tooth surface (30) adjacent to the second tip portion (31) has a second undercut (32) extending in the height direction (y) at a second undercut angle (33) that is sharper than the first working angle (29) of the adjacent second tip portion (31).

5. The card wire (1) according to claim 4, A card wire (1) characterized in that the first tooth surface (13) has one or more further undercuts (18) following the tip portion (14) and the first undercut (16), having an acute undercut angle (17) greater than that of each adjacent intermediate portion (19) of the tooth surface (13) closer to the first tooth tip (10).

6. A card wire (1) according to claim 4 or 5, A card wire (1) characterized in that the acute undercut angle (17) of the first undercut (16) and / or further undercut (18) is 50° to 90°.

7. A card wire (1) according to any one of claims 1 to 6, A card wire (1) characterized in that the first recess (8) of the blade portion (5) includes a first tooth root (21) which is the point closest to the base portion (2) in the height direction (y), and the first tooth depth (20) of the tooth body (7) corresponds to the distance in the height direction (y) from the highest position of the tooth body (7) of the first tooth tip (10) and the second tooth tip (11) to the first tooth root (21), and is less than or equal to the height (6) of the blade.

8. The card wire (1) according to claim 7, A card wire (1) characterized in that the first tooth depth (20) is greater than or equal to the height (4) of the bottom.

9. A card wire (1) according to claim 7 or 8, A card wire (1) characterized in that the first tooth depth (20) is 1 mm to 4 mm, preferably 1.4 mm to 3.3 mm.

10. A card wire (1) according to any one of claims 7 to 9, A card wire (1) characterized in that the difference between the distance in the height direction (y) from the first tooth root (21) to the first tooth tip (10) or the distance in the height direction (y) from the first tooth root (21) to the second tooth tip (11) and the first tooth depth (20) is 0% to 30% or 0% to 20%, preferably 0% to 10%.

11. A card wire (1) according to any one of claims 7 to 10, A card wire (1) characterized in that the second tooth depth (22) in the height direction (y) of each second recess (23) adjacent to the second tooth tip (11) and facing the direction of the second recess (23) is 0.5% to 50%, 0.5% to 30%, or 0.5% to 20% of the first tooth depth (20).

12. A card wire (1) according to any one of claims 1 to 11, The card wire (1) is characterized in that the width (24) of the bottom portion of the base portion (2), measured in the width direction (z), is 0.5 mm to 3.5 mm, preferably 0.65 mm to 1.3 mm.

13. A closing carrier for a carding machine, characterized by being a card wire (1) according to any one of claims 1 to 12.

14. A carding machine characterized by being a closing carrier as described in claim 13.

15. A carding machine according to claim 14, A carding machine characterized in that the closing carrier is a worker roller, a takeoff roller, or a licker roller, or the carding machine is a comber and the closing carrier of the comber is a cylinder.

Images