Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
  • D01G7/00—Breaking or opening fibre bales
  • D01G7/04—Breaking or opening fibre bales by means of toothed members

Definitions

• the invention relates to a removal roller for the mechanical opening of fiber bales.
• the removal roller comprises a shaft rotatable about a shaft axis and toothed disks fastened to this shaft.
• the toothed discs are provided with teeth on their outer circumference.
• Discharge rollers are used in so-called bale removal machines or bale openers to release fibers or fiber flakes from pressed fiber bales. For this purpose, one or more removal rollers are moved over the fiber bales. Bale openers are also known from the prior art in which the fiber bales are moved past a stationary removal roller.
• the bale stripping machine is at the beginning of processing lines in a spinning mill preparation (processing plant) for the processing of fiber material, such as cotton or synthetic fibers or their mixtures, and has a decisive influence on the continuity of the processes within the spinning mill preparation.
• the bale removing machine the fiber material delivered in bales is released from the bales by removing fiber flakes and transferred to a pneumatic transport system.
• the pneumatic transport system brings the fiber flakes through pipes to the following cleaning machines.
• a grate is provided between the removal roller and the fiber bale.
• the teeth of the removal roller reach through the grate.
• the rust serves as a retaining element for the fiber bales. Due to the grate elements, which rest on the surface of the fiber bales, it is prevented that too large or irregular fiber flakes are torn out of the fiber bale by the teeth of the removal roller.
• Many designs of removal rollers are known from the prior art. For example, EP 0 058 781 discloses a removal roller in which the toothed disks are fastened to semicircular shells. Two of these half shells each
• CONFIRMATION COPY comprise the shaft of the removal roller and are fastened to each other such that an interference fit results between the half shells and the shaft.
• a disadvantage of the disclosed design of the removal roller is the complex construction of the half shells and the detachable by a press fit attachment of the toothed discs, which can be solved even during operation.
• CH 669 214 Another embodiment of a removal roller discloses the CH 669 214.
• the toothed disks are helically formed.
• the toothed disks are punched circular from a sheet metal and provided with an opening cut, to be subsequently bent to a helix.
• CH 669 214 also discloses a helical arrangement of individual teeth.
• the helix as well as the individual teeth are fixed by welding on a cylindrical base body.
• the helix are arranged left or right-handed rotation on the base body.
• the helical arrangement of the teeth should make it possible to achieve a uniform removal of fiber flakes over a certain width.
• the pitch of the helix corresponds to the distance between two grate elements through which the teeth of the removal roller pass.
• a disadvantage of the disclosed construction is that, after completion of a handling of the removal roller of the subsequent tooth of a next handling causes a return of Abtragungsortes over the entire width between two grate elements.
• the surfaces of the fiber bales are processed between two grate elements only in one direction.
• the object of the invention is to provide a removal roller which is simple in terms of its design, which allows a removal which moves continuously over the surface of the fiber bales.
• a novel removal roller is proposed with a shaft rotatable about a shaft axis and attached to this shaft circular toothed discs, which are provided at its outer periphery with teeth.
• the Toothed disks have an elliptically shaped, central recess with which they enclose the shaft in an annular manner.
• the toothed disks have an inclination against the shaft axis.
• the toothed discs have a central elliptical recess.
• the shape of the elliptical recess used is symmetrical.
• the ellipse has a largest length, which lies on a first axis.
• the shortest length of the ellipse is in a symmetrical shape on a second axis perpendicular to the first axis.
• the shaft diameter corresponds to the smallest length of the elliptical recess in the toothed discs, with a slight clearance is provided between see the recess and the shaft surface.
• the smallest length of the elliptical recess is thus slightly larger than the diameter of the shaft to allow easy installation of the toothed pulleys on the shaft.
• the largest length of the elliptical recess corresponds to the circumference of the shaft measured at one
• the shaft provided for fastening the toothed pulleys may be a solid shaft or else a hollow shaft. It is also conceivable to use a wave-like circular skeleton, which is surrounded annularly by the toothed discs with their recess.
• the toothed disks are rotated in their sequence in the direction of the shaft axis by a certain angle against each other in the radial direction.
• the individual successively arranged on the shaft toothed pulleys are identical in their construction.
• the toothed disks are different in their radial arrangement. This ensures that not all toothed discs with a tooth engage simultaneously in the fiber bales.
• the radial rotation ensures that a tooth of the first tooth engages disc in the fiber bale and only after the shaft has been further rotated, a tooth of the following toothed disc comes into engagement. This also ensures that, viewed over the entire length of the removal roller, a continuous removal of fibers from the fiber bales takes place. Also, the staggered engagement of the individual toothed pulleys reduces the transmission of vibrations.
• the toothed disks in the elliptical recess at the location of a largest diameter on a projection are dimensioned such that the clear width of the recess at the location of the projections or the one projection is not smaller than the smallest length of the recess. This ensures that the toothed discs can be pushed despite the projections on the shaft.
• the shaft has recesses on its surface, which receive the projections accordingly. The dimensions of the recesses in the shaft surface are matched in their dimensions to the projections of the toothed discs.
• the toothed discs can be pushed onto the shaft and locked in their predetermined position by means of the projections in the recesses in the shaft surface.
• the depressions in the shaft surface are arranged helically in the direction of the shaft axis in accordance with a specific radial rotation of the successive toothed disks.
• the projection of the toothed disc forms a positive connection in cooperation with the recess in the shaft surface.
• a force transmission from the toothed disk to the shaft can take place through the projections and the depressions.
• the toothed discs are secured by welding or gluing in position on the shaft.
• the envisaged securing the toothed pulleys on the shaft by suitable means is only the persistence of the toothed discs in their position. Accordingly, a simple backup can be made, for example, by simple welding points or even selectively applied adhesives. A Power transmission need not be ensured by a suitable fastener such as screws or welds, since there is a positive connection between the shaft and toothed pulley.
• the shaft is formed as a tube and the recesses are applied as through holes. The projections arranged in the toothed disks are correspondingly received by the holes in the jacket of the shaft designed as a pipe.
• the toothed disks have an inclination against the shaft axis at an angle of 5 ° to 20 °.
• the angle of inclination is measured against a plane perpendicular to the longitudinal direction of the shaft axis.
• the inclination angle can be measured in one direction or the other.
• the size of the angle of inclination is determined by the greatest length of the elliptical recess of the toothed discs.
• the toothed disks of a removal roller are manufactured with the same inclination, ie with the same inclination angle. However, it is conceivable to vary the inclination between the individual toothed disks or areas of the removal roller.
• the inclination of the toothed disks determines the removal width of a single toothed disc. This influences the design of the rose or the distance between the individual grate elements, between which the teeth of the toothed discs pass. If the toothed disks of a removal roller are fastened to the shaft at different angles of inclination, the rust used must be adapted accordingly. Particularly preferably, all toothed disks of a removal roller with an identical inclination angle of 9 ° are arranged on the shaft.
• the radial rotation between two successive toothed disks is provided at an angle of 6 ° to 36 °. This results after a certain number of toothed pulleys full handling.
• the tenth toothed disk is arranged identically to the first toothed disk.
• the angle of rotation is selected depending on the number of toothed pulleys on the entire removal roller, resulting in a whole number of helical lines.
• Particularly preferred are the individual toothed discs with an angle twisted against each other, which corresponds to the nth part of 360 ° or a multiple thereof, where n stands for the number of toothed pulleys on the removal roller.
• the resulting due to the inclination of the toothed discs dynamic imbalance is compensated.
• an oppositely inclined toothed disc is present for compensation.
• the toothed disks can also be arranged in mirror image on the shaft, wherein the direction of rotation changes after one revolution.
• the toothed discs at the outer ends of the discharge roller may have a different rotation than the toothed discs which are arranged in the middle of the shaft.
• the toothed discs each comprise between four and twelve teeth.
• the teeth are arranged on the outer circumference of the toothed discs.
• the outer circumference of the toothed discs is circular, in contrast to the recess.
• a rotationally symmetrical arrangement of the teeth is possible.
• a toothed wheel has six teeth.
• the teeth are subjected to a heat treatment on their outer surface to give them a certain wear resistance. As a heat treatment, a compensation or curing are used. However, other methods for increasing the wear resistance are conceivable, such as a coating instead of the heat treatment. A sufficient wear resistance can under certain circumstances also be achieved by the appropriate selection of the material to be used.
• the teeth preferably have an outer shape, which allows operation of the removal roller in both directions. As a result, the removal roller can be moved over the fiber bales in both directions and these can also be removed in both directions.
• the toothed disks in the elliptical recess at at least one point have a recess and the shaft on its surface elevations, wherein the recess of the toothed disc in interaction with the survey in the shaft surface forms a positive connection.
• the tooth tips of the teeth lie on an elliptical envelope of the toothed disks, the toothed disks being mounted on the shaft at the angle of inclination ⁇ such that the tooth tips of the teeth come to lie on a circular enveloping circle of the removal roller with an enveloping circle diameter D. , This ensures that all tooth tips engage equally deep in the bales to be removed.
• FIG. 1 Schematic representation of a removal roller
• FIG. 2 Schematic representation of a side view and a top view of a removal roller
• FIG. 3 Schematic representation of a toothed pulley of a removal roller
• FIG. 4 Schematic representation of a shaft of a removal roller
• Figure 1 shows a schematic perspective view of a part of a removal roller 1.
• the removal roller 1 comprises a shaft 2 with a shaft axis 3 and on the shaft 2 arranged toothed disks 4.
• the shaft 2 is shown as a solid shaft, but can also be as a hollow shaft or Other suitable form of a circular body can be used.
• the toothed discs 4 are provided at its outer periphery with six teeth 5.
• the toothed disks 4 are arranged at a uniform distance on the shaft 2. Opposite the shaft axis 3, the toothed discs 4 are mounted inclined. In addition, a subsequent toothed disc 4 is arranged rotated relative to a preceding toothed disc 4.
• FIG. 2 schematically shows a side view in the left-hand illustration and a top view of a removal roller 1 in the right-hand view.
• the left-hand illustration shows a detail of a removal roller 1 with four toothed disks 4 mounted on a shaft 2.
• the shaft has an outer diameter C.
• Toothed disks 4 are equipped with a angle ⁇ is fixed on the shaft 2.
• the inclination angle ⁇ is the same for all four toothed disks 4 shown.
• the toothed disks 4 are arranged in their sequence with a radial rotation with the angle .beta.
• the displacement ⁇ also results in an offset of the teeth 5 of the successive toothed discs 4 by the angle ⁇ .
• the combination of inclination angle ⁇ and the angle of rotation ß results in a visually apparent change in the inclination of the toothed disc 4 against the shaft axis 3. This is due to the fact that the rotation of two successive toothed disks 4, the plane in which the inclined toothed disc 4th is also rotated about the shaft axis 3. Due to the inclination ⁇ of the toothed disc 4, this passes over a working area E when the removal roller is handled in the longitudinal direction of the shaft axis.
• This working area E corresponds in its dimensions to the clear width between two grate elements through which the toothed disc 4 engages with its teeth 5, on both sides a, the operation of the machine adapted game between grate element and toothed disc 4 is provided.
• Fig. 3 shows a schematic representation of a toothed disc 4 of a removal roller.
• the toothed disc 4 is annular.
• On the outer surface AF six teeth 5 are arranged.
• the teeth 5 are mounted on the circumference of the toothed disc 4 at regular intervals.
• the teeth 5 have a shape which allows operation of the removal roller in both directions of rotation.
• the teeth 5 are symmetrically shaped such that the same effect is produced when the toothed disc 4 rotates in both directions of rotation.
• a recess 6 is provided in the center of the toothed disc 4.
• the recess 6 is elliptical in shape and has a minimum length B in a first axis 9 and a maximum length A in a second axis 8 of the ellipse.
• the first axis 9 and the second axis 8 are perpendicular to each other, resulting in an axisymmetric elliptical shape of the recess 6.
• the elliptical recess 6 is arranged centrically to form an elliptical envelope 11 of the toothed disc 4, on which the tooth tips 5a of the teeth 5 of the toothed disc 4 lie.
• the elliptical envelope 11 of the respective toothed disc 4, on which the tooth tips 5 a lie, is selected such that in the fastened state of the toothed disc 4 on the shaft 2 under a tilting Angle ⁇ the tooth tips 5a in a circular enveloping circle H with a Hüllnik malmesser D of the removal roller 1 run.
• a projection 7 is provided in the second axis 8 of the largest length A of the recess 6, a projection 7 is provided.
• the projection 7 is dimensioned such that the largest length A minus the height of the cam 7 of the recess 6 is not smaller than the smallest length B of the recess 6. This is true even if on each side of the recess 6 in the second axis 8, a projection 7 is provided.
• FIG. 4 shows a schematic representation of a shaft 2 of a removal roller with a diameter C.
• the diameter C of the shaft 2 is slightly smaller than the smallest length B of the recess 6 of a toothed disc 4 (see FIG. 3).
• recesses 10 are provided in the surface of the shaft 2 .
• the recesses 10 are matched in their dimensions to the projections 7 (see FIG. 3), so that upon engagement of the projections 7 in the recesses 10 a positive connection between the shaft 4 and the toothed disc is formed.
• the depressions are arranged helically in the sequence of the shaft 2 in their sequence.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Preliminary Treatment Of Fibers (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=48428521

Family Applications (1)

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Citations (5)

Family Cites Families (8)

• 2012
  • 2012-04-13 CH CH00508/12A patent/CH706351A1/de not_active Application Discontinuation
• 2013
  • 2013-04-05 WO PCT/IB2013/000740 patent/WO2013153444A1/fr not_active Ceased
  • 2013-04-05 EP EP13722058.8A patent/EP2836630B1/fr active Active
  • 2013-04-05 TR TR2018/15006T patent/TR201815006T4/tr unknown
  • 2013-04-05 CN CN201380019439.2A patent/CN104246034B/zh active Active

Patent Citations (5)

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