Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
  • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
  • D01G15/02—Carding machines
  • D01G15/12—Details
  • D01G15/14—Constructional features of carding elements, e.g. for facilitating attachment of card clothing
  • D01G15/24—Flats or like members
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
  • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
  • D01G15/84—Card clothing; Manufacture thereof not otherwise provided for
  • D01G15/88—Card clothing; Manufacture thereof not otherwise provided for formed from metal sheets or strips

Definitions

• the invention relates to a clothing and a flat rod for a textile processing machine.
• carding machines have the task of dissolving fiber flakes down to the individual fiber, as well as the nits.
• the fiber flakes are passed between a spool and a revolving lid, the fibers are aligned and separated.
• the tambour is usually equipped with a circumferential saw tooth set, in which individual teeth are produced from a flat wire by means of punching.
• the revolving lid usually consists of many flat bars with flexible sets in which a plurality of individual wires are attached in elastic fabric inserts, the tips of which correspond at very close distance with the tips of the sawtooth of the main cylinder and thus form the carding gap.
• the clothing strip for use in a textile processing machine comprises a plurality of tooth segments each having a plurality of teeth, each having a tooth tip and a tooth root, wherein the tooth segments are arranged parallel to each other and connected directly or indirectly.
• the invention is characterized in that the connection of the tooth segments takes place cohesively, whereby the tooth segments are completely free of play with each other.
• the cohesive connection for example by a laser or inert gas welding, allows a largely automatic Manufacture of clothing strips, which is much faster and more accurate than the production of the sets in which the hooks are inserted into a fabric body.
• the toothed segments for direct connection at least one groove, within which the cohesive connection is arranged.
• the outer contour of the tooth segments is not changed.
• the weld has a higher fatigue strength than a surface-applied weld, which is then partially ground off.
• the at least one groove can be arranged in the region of the tooth root, which results in only a slight heat load on the hardened tooth heads.
• An indirect connection of the tooth segments with one another can take place via a metal strip, to which the tooth segments are connected by at least one weld seam.
• the metal strip allows a more flexible and planar application to a fixture within the flat bar and a high tolerance accuracy of the clothing strip. In order to achieve the highest possible flexibility, it should be ensured that in this indirect connection, the toothed segments are not welded together, but are only attached to the metal strip.
• a plurality of welds can be arranged in the longitudinal direction of the clothing strip and have a limited length, wherein the welds are arranged offset from one another.
• the clothing strip is thus flexible and can rest flat with a minimum of rework within the flat bar.
• the toothed segments may have offset grooves in the region of the welds.
• the grooves By a alternating arrangement of the grooves only every second toothed segment is connected to the metal strip over this weld, so that adjacent tooth segments are not fastened to the metal strip at the same time with the same weld. This prevents a connection of the tooth segments with each other.
• the metal strip is so flexible at least in the longitudinal direction that it can adapt to the surface of the magnet with a small amount of rework.
• the welds in the longitudinal direction of the clothing strip can at least partially overlap, whereby the clothing strip is flexible.
• the metal strip has at least one slot orthogonal to its longitudinal direction.
• the slots can extend only over a portion of the width of the sheet metal strip.
• the flat rod according to the invention for a textile processing machine comprises a recess for receiving a clothing strip and is characterized in that the clothing strip comprises a plurality of tooth segments, which can be fastened by means of magnetic force on the flat rod.
• This allows easy assembly and disassembly of the clothing strip from the flat bar, which can thus remain in the spinning mill when replacing or regrinding the clothing strip.
• About the magnetic connection of clothing strip with the flat bar can be done with high precision in compliance with the smallest tolerances sharpening of the tooth tips.
• the top of the clothing strip is flat on the magnet in the flat bar, so that no assembly inaccuracies can occur.
• the top of the clothing strip reference point for the grinding machine which in Contrary to the elastic crochet sets has the necessary strength and does not rebound during the grinding process.
• At least one toothed segment has a spring with which a positive connection with the flat bar can be produced, force peaks during carding can not solve the magnetic connection.
• the integrated on the sector gear spring allows accurate mounting of the clothing strip on the flat bar without additional mechanical components, since the spring is punched in one operation in the manufacture of teeth with out of the flat wire or a profiled wire out.
• Figure 1 a flat rod according to the prior art in
• Figure 2 a side view of a clothing strip
• FIG. 3 shows a further side view of a clothing strip
• Figure 4 a representation in the longitudinal direction of the clothing strip
• Figure 5 is a plan view of the top of a clothing strip
• Figure 6 is a plan view of the top of a clothing strip according to another embodiment
• FIG. 7 a plurality of tooth segments in the profile before welding
• FIG. 8 shows several tooth segments in profile after welding
• Figure 9 the assembly of a clothing strip in a flat bar.
• a known prior art flat bar 1 is shown in side view in FIG.
• the flat bar 1 comprises a lid head, not shown here, which generates a certain stiffness with its geometry and thus generates a constant carding gap across the width of a drum of a card or a carding machine with its sawtooth set.
• On the cover foot 1a two webs 1 b, 1 c arranged on both sides form a recess 1 d, which is suitable for receiving at least one flat clothing 4.
• the recess 1d according to this example is designed in two stages, so that a magnet 3 is fixedly connected via an attachment 2 with the flat rod 1.
• the attachment 2 can be designed as an adhesive bond or other cohesive connection, or as a mechanical connection.
• the flat cover 4 essentially comprises a support element 6, which receives the hooks 7, and a steel sheet 5, which is connected to the support element 6.
• the support element 6 is usually formed from a textile structure or a fabric body, in which the plurality of hooks is tightly integrated.
• the steel sheet 5 is held by means of magnetic force on the magnet 3.
• the check marks 7 point with their tip on the spool and form the Kardierspalt with the teeth of the saw tooth set, not shown.
• each clothing strip 8 consists of a multiplicity of toothed segments 10, which are lined up one behind the other.
• Each toothed segment 10 consists of a plurality of teeth 13 each having a tooth head 11 and a tooth root 12.
• the tooth heads 11 are directed against the direction of rotation of the main cylinder, not shown, against the fibers to be combed.
• a clothing strip 8 thus comprises a multiplicity of toothed segments 10 lined up with each other and welded together, wherein the weld seam 15 is arranged parallel to the longitudinal axis of the flat rod 1.
• the toothed segments 10 are connected to each other directly via a weld 15.
• two mutually spaced grooves 14 are arranged so that the tooth segments 10 can no longer warp or twist after welding.
• the clothing strip 8 consist of a plurality of toothed segments 10, which are arranged one behind the other and connected to each other.
• Each sector gear 10 may consist of one piece punched sawtooth wire or a profiled wire with a tooth tip 11 and a tooth root 12.
• the toothed segments are arranged with offset teeth 13, 13a, wherein the offset of the teeth 13, 13a can be repeated over the entire length of the clothing strip 8 and the flat bar 1.
• at least one weld 15 is applied to the upper surface of the tooth segments
• toothed segments 10 applied, which thus forms the top 16 of the clothing strip 8.
• the toothed segments 10 are connected to each other directly via a weld 15.
• a sheet metal strip 17 is used to produce the clothing strip 8, which corresponds in its length substantially the length of the flat bar 1.
• a plurality of toothed segments 10 are arranged, which are materially connected to the sheet metal strip 17.
• the tooth segments 10 are with their tooth base 12 under the metal strip 17 positioned.
• the toothed segments 10 can be lined up according to the length of the flat bar 1.
• the sheet metal strip 17 is positioned on the toothed feet 12 and connected to the toothed segments 10 with a material fit.
• a welding method is used, for example laser welding, with which a cohesive connection between the toothed segments 10 and the sheet metal strip 17 is produced.
• the metal strip 17 can be made of spring steel and should be as flexible as possible to adapt to the surface of the magnet 3 in order to fit flush.
• the toothed segments 10 are indirectly connected to one another via the sheet-metal strip 17 by means of at least one weld seam 19.
• FIG. 5 shows the plan view of the upper side 16 of a sheet-metal strip 17, in which a plurality of toothed segments 10 are arranged below the sheet-metal strip 17 transversely to the longitudinal direction of the flat bar.
• the toothed feet 12 are connected by laser welding to the sheet metal strip 17, wherein the welds 19, which are indicated here only symbolically, can extend in a simple embodiment without interruption over the entire length of the sheet-metal strip 17.
• at least two weld seams 19 are preferably arranged parallel to one another, which connect each toothed segment 10 to the sheet metal strip 17.
• the sheet metal strip 17 along the planned weld 19 may be necessary to provide the sheet metal strip 17 along the planned weld 19 with a narrow longitudinal groove (not shown), the is at least partially filled during the welding process with the weld metal.
• the welds 19 extend only over a certain length of the sheet metal strip 17 and partially overlap each with two other welds 19, so that a limited number of tooth segments 10 are connected with four welds with the metal strip 17, all other tooth segments 10th only with two welds 19.
• the longitudinal direction of the flat bar thus results in a flexibility of the metal strip 17, which thereby adapts the magnet better, which has the advantage that, in contrast to the embodiment of Figure 2 or 3, the top 16 machined with a lower precision can be.
• a good compromise of economic production and the highest possible flexibility of the metal strip 17 is achieved when the welds do not pass over the entire length of the flat bar 1, but have only a limited length and are offset from one another. Due to this limited rigidity, the necessary reworking of the upper side 16 can be reduced, with the clothing strip 8 being able to rest flush against the magnet 3.
• the metal strip 17 as a carrier material for the tooth segments can be achieved if slits 18 are arranged in the sheet metal strip 17 parallel to the arrangement of the tooth segments 10 and thus transversely or orthogonally to the longitudinal direction of the flat bar.
• the slots 18 extend over only a portion of the width of the metal strip 17, so that on the one hand, the necessary stability of the metal strip 17 is not endangered as a support body, but on the other hand sufficient flexibility is generated, and thereby the top 16 of the clothing strip. 8 the surface of the magnet 3 can adapt with a minimum of rework.
• the slots 18 - similar to the welds 19 - overlap at least partially over their length. In this embodiment, the slots 18 do not overlap with the welds 19, but this may well be possible.
• the highest flexibility in the longitudinal direction of the clothing strip 8 is achieved by the toothed segments 10 are not connected to each other by the welding process, but are only welded to the sheet metal strip 17.
• the alignment of the tooth segments 10 to each other not parallel, but at a predetermined angle a.
• the feet 12 touch only at the lowest point and go to the tooth head 11 apart.
• the toothed segments 10 are aligned with one another due to the distortion in the weld seam 15 (FIG Arrange parallel to each other and touch in the area of the tooth root 12 over the entire surface.
• the angle a which is 0 ° after welding, depends inter alia on the welding method and the size of the weld 15 and can be adjusted for each clothing strip 8 during pre-assembly.
• the adjustment of the correct angle ⁇ can take place by means of unillustrated intermediate pieces in a device, which are arranged between the tooth heads 11.
• the device not shown, may have a curved surface on which the toothed segments 10 are arranged with their top 16 in a row. The curvature of the surface corresponds to the angle ⁇ and the expected distortion of the weld seam 15.
• inert gas or Laser welding can be used, which enable, among other things, an automated production.
• the upper side 16 of the clothing strip 8 is milled and / or ground and exactly adapted to the surface of the magnet 3.
• the height of the clothing strip 8 from the upper side 16 to the tip of each tooth 13 is precisely adjustable, so that the flat bar 1 can be quickly maintained by a quick replacement of the clothing strips.
• the juxtaposed and welded toothed segments 10 offer in comparison to the hooks the advantage that the toothed segments 10 are connected to each other without play.
• the invention an efficient and inexpensive production of clothing strips 8 is possible. Furthermore, the invention enables a simple assembly of the clothing strips 8 in the flat bar 1, so that a faster and more precise replacement of worn clothing strips 8 is ensured without disassembling the flat bar 1. A particularly important advantage is the precise regrinding and assembly of the clothing strip 8 without having to dismantle the flat bar 1. It can thus comply with very small tolerances on the carding gap.
• a magnet 3 is arranged by means of a fastening 2, wherein the attachment 2 can be designed as a mechanical connection to the cover foot 1a, or as cohesive connection, for example as an adhesive bond.
• the magnet 3 are preferably permanent magnets with a high magnetic coercive force, such as magnets with a neodymium-iron-boron alloy or from a samarium-cobalt alloy, where the risk of demagnetization at operating temperatures above 50 ° Celsius is low.
• the clothing strip 8 is mounted with its upper side 16 in the recess 1 d, in which the spring 9 is first inserted into the groove 1 e and the clothing strip 8 is rotated or tilted around the groove 1 e in the recess 1 d counterclockwise.
• the tooth heads 11 have in their inclination against the direction of rotation of the spool and are directed against the fibers to be carded.
• the clothing strip 8 is thus not only frictionally, but also positively held in the cover foot 1a.
• the positive connection can also be produced by other means, for example a dovetail shape, an integrated fastening means or an outer cover.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Preliminary Treatment Of Fibers (AREA)
• Manufacture Of Motors, Generators (AREA)

Priority Applications (4)

Applications Claiming Priority (4)

Publications (1)

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Family Applications (1)

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Cited By (2)

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Citations (7)

Family Cites Families (14)

• 2013
  • 2013-05-07 WO PCT/EP2013/001349 patent/WO2013178319A1/de active Application Filing
  • 2013-05-07 BR BR112014018780A patent/BR112014018780B8/pt active IP Right Grant
  • 2013-05-07 JP JP2015500801A patent/JP2015514877A/ja active Pending
  • 2013-05-07 EP EP13726678.9A patent/EP2855749B1/de active Active
  • 2013-05-07 CN CN201380008016.0A patent/CN104105824B/zh active Active
• 2015
  • 2015-12-01 JP JP2015234679A patent/JP6092992B2/ja active Active

Patent Citations (7)

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