EP0482475B1 - Dispositif de détachement de la nappe - Google Patents

Dispositif de détachement de la nappe Download PDF

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Publication number
EP0482475B1
EP0482475B1 EP91117548A EP91117548A EP0482475B1 EP 0482475 B1 EP0482475 B1 EP 0482475B1 EP 91117548 A EP91117548 A EP 91117548A EP 91117548 A EP91117548 A EP 91117548A EP 0482475 B1 EP0482475 B1 EP 0482475B1
Authority
EP
European Patent Office
Prior art keywords
lap
nozzle
air
wadding
roll
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91117548A
Other languages
German (de)
English (en)
Other versions
EP0482475A1 (fr
Inventor
Heinz Clement
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0482475A1 publication Critical patent/EP0482475A1/fr
Application granted granted Critical
Publication of EP0482475B1 publication Critical patent/EP0482475B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G19/00—Combing machines
    • D01G19/06—Details
    • D01G19/08—Feeding apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/08—Automatic end-finding and material-interconnecting arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments
    • B65H2701/311—Slivers

Definitions

  • the invention relates to a method for releasing a cotton wool beginning from a cotton wadding, or to a device for carrying out the method.
  • the new wadding is removed by hand after placing a new wrap on a holder for unrolling the wadding and manually applied to the end of the wadding.
  • the new wadding is detached by means of a sieve drum that is under pressure inside and placed downwards in the nip of two conveyor rollers for attachment to the wadding end that is running out.
  • the new wadding is blown off by means of a nozzle which acts counter to the unwinding direction of the roll and is placed on the wadding end which is running out.
  • the blowing process, or the loosening of the new wadding end, is monitored by a sensor.
  • the solution with the sieve drum is relatively complex and expensive and carries the risk of contamination of the sieve drum during continuous operation due to fiber fly and other components.
  • the delivery of the new beginning of cotton, which has been detached from the screening drum, to the subsequent conveyor rollers can lead to problems, especially the new one
  • the wadding on a part of the discharge path hangs freely down on the conveyor rollers and is not guided.
  • the tips of the new wadding start can fold over and there can be mass accumulations in the area of the attachment point with the wiping end of the wadding. This turning over of the tips of the new wadding can occur when uncontrolled air flows occur in the area of the dispensing.
  • the device or the method is intended to ensure a safe transfer to a subsequent attachment point to the cotton that is running out.
  • This object is achieved in that over at least the wadding width and at a distance from the periphery of the An approximately tangential and in the unwinding direction to the cotton roll leading air flow is generated.
  • the subsequent guidance after detachment in a predetermined position ensures the safe transfer to the subsequent attachment point.
  • the detachment can take place by rotating the wadding roll, whereby the wadding beginning at the wad comes into the area of the air flow or by corresponding stationary feeding of the wadding wadding, whereby the wadding beginning at the wrap is positioned in the area of the air flow.
  • a nozzle with one or more air outlet openings oriented approximately tangentially and in the unwinding direction to the cotton wadding be arranged over at least the wadding width and at a distance from the periphery of the cotton wadding.
  • the expression tangential is not to be understood in a restrictive manner, precisely to the tangent to the outer circumference of the winding, but rather in an angular range which includes the tangent and is at least not directed against the unwinding direction.
  • the outlet openings for the air jet from the nozzle can be designed both as a continuous slot projecting beyond the width of the wadding or as bores which are arranged next to one another at a distance.
  • the further proposed guide surface in the extension of the air outlet openings of the nozzle ensures a safe transfer to the subsequent attachment point.
  • the further proposed geometric arrangement of the air outlet openings in relation to the periphery of the wadding roll and the nozzle in the detaching position ensures that, due to the prevailing air currents and the resulting negative pressure areas, the wadding start is safely released from the roll after passing through the nozzle.
  • the movable attachment of the nozzle enables a simple and safe transfer of the removed cotton wool start to a subsequent attachment point to an emerging cotton wool end.
  • the air speed of the air jet generated by the nozzle is designed to be changeable during the removal or attachment process. It is advantageously proposed to apply a high air velocity during the removal and, after the removal operation has taken place, a lower air velocity of the air jet via the nozzle.
  • the attachment of side guides to the guide surface restricts the lateral spread of the air jet and ensures that the removed wadding begins to retain its width and does not break out laterally.
  • Fig. 1 shows a winding holder 1, which is provided with a front winding roller 2 and a rear winding roller 3 for receiving the wadding roll 4.
  • the wadding roll 4 consists of a wadding 5, which was wound onto a sleeve 6 in a special process.
  • the winding rollers 2, 3 are coupled to a drive 7.
  • a detaching device 8 for detaching the beginning of the wadding 9.
  • the detaching device 8 consists of a tubular nozzle 10 which extends at least over the width of the roll 4 and which is arranged so as to be pivotable about the axis of rotation 13 of the front winding roll 2 via pivot arms 11, 12 attached at both ends.
  • the nozzle 10 has an air outlet slot 16 which, in the solid position of the detachment device shown in FIG. 1, points in the tangential direction and in the unwinding direction A of the roll 4.
  • the air outlet slot 16 also extends continuously over the width of the roll 4. Instead of the slot 16, a large number of bores made next to one another could also be present.
  • a guide plate 17 is attached to the nozzle 10, which also extends over the width of the cotton roll 4.
  • the guide plate 17 is provided with lateral guides 53 on its narrow sides for lateral guidance of the wadding beginning 9 or the air flow S.
  • a distributor pipe 18 is attached within the tubular nozzle 10, with outlet openings 19 provided on its circumference. This can be seen in particular from FIG. 2.
  • the distributor pipe 18 serves to supply compressed air and is closed at one end and connected to a compressed air line 20 at the other end.
  • the compressed air line 20 is flexibly attached, so that it can also be moved when the detaching device 8 is pivoted.
  • a uniform pressure distribution in the area of the outlet slot 16 is ensured by the supply of the compressed air via the openings 19 provided on the circumference of the distributor pipe 18.
  • the two swivel arms 11, 12 of the nozzle 10 are connected via a plate 14, which at the same time forms a guide surface for the rolling cotton wool.
  • the nozzle 10 is closed on its lateral end faces, so that the compressed air supplied via the compressed air line 20 can only emerge at the air outlet slot 16.
  • the pivoting movement of the detachment device into the dash-dotted lower layer shown in FIG. 1 is carried out by a cylinder 22 articulated on a schematically indicated frame 21.
  • the winding rollers 2, 3 and the other elements listed are also mounted on this frame 21.
  • the start of winding 9 is already in a detachment position and is released to an attachment point 23 by pivoting the detachment device 8 into the lower position shown in broken lines.
  • the attachment point 23 consists of a lower roller 24 and an upwardly displaceable pressure roller 25.
  • a wadding end 26 of the outgoing wadding 27 which protrudes backwards and downwards a combing device 28 is supplied.
  • the cotton wool 27 is guided over a guide plate 31 and fed to a pair of tongs 33 via a feed cylinder 32.
  • a rotating circular comb 34 which combs out the fiber beard which projects in a known manner in the clamping position of the pliers.
  • the combed-out fiber beard is drawn off the cotton wool 27 by means of subsequent tear-off cylinders 35 and passes through a correspondingly supplied fixed comb 36 during the tear-off process.
  • the lower roller 24 of the attachment point, the feed cylinder 32, the circular comb 34 and the tear-off cylinder 35 are connected to a schematically indicated drive 37.
  • the drive unit 37 is also responsible for the movement of the pliers unit 33. For reasons of clarity, however, the illustration has been omitted.
  • the control 29 of the compressed air source 30 for supplying the nozzle 10 with compressed air to generate the air flow S, the control of the drive 7 of the winding rollers 2, 3 and the control of the compressed air source 47 of the cylinder 22 for the pivoting of the nozzle 10 is connected to one another in a central control unit 52.
  • a sweeping device for the cotton wool could also be arranged in a cotton wool sweeping section when using this attachment device.
  • a preparation device 40 for the wadding end 9 is pivotably attached to the frame 21 via swivel arms 38, 39.
  • the preparation device 40 here consists of a suction channel 41 and a clamping part 42 which is pivotally attached to the entrance of the suction channel.
  • the clamping part 42 can be pivoted about a flexible collar 44 via a cylinder 43. In the clamping position, the clamping part 42 rests on the opposite wall part 45 of the suction channel 41.
  • a sensor 48 for detecting the beginning of the wadding is located below the clamping point.
  • the suction channel 41 which is otherwise closed on all sides except for the suction opening 49, has an opening on one of its end faces, to which a suction pipe 50 is flexibly connected.
  • Fig. 3 shows a position, with a new wadding 4 already on the winding rollers 2, 3.
  • This wadding 4 was manually or automatically placed on the winding rollers 2, 3 after the empty sleeve of the leaking cotton 27 was removed via an ejection device, not shown, or manually.
  • an ejection device could, for example, be designed in accordance with the design according to JP-AS 63-27449.
  • the running out of the old roll is monitored by a sensor 51, which then responds as soon as the contrast changes from the white running out cotton wool to the black surface of the sleeve 6.
  • a device (not shown here in greater detail) is put into operation, which prepares the running out wadding end 26 for a subsequent attachment process with a new wadding start.
  • Such a device can be found in the earlier British patent application with the application number 9009939.1 from May 2, 1990 of Maschinenfabrik Rieter AG.
  • the lap 27 is transferred to the position shown in FIG. 3, the lap end 26 being clamped over the attachment point 23 and in the direction of the new lap 4 given piece protrudes. 3 is controlled by sensors (not shown) and has already been addressed in the earlier British patent application cited.
  • the further transport of the outgoing cotton wool 27 to the subsequent processing unit is now interrupted, ie the cotton wool end 26 protruding rearward from the attachment point 23 assumes a waiting position for the application of a new cotton wool start 9.
  • the new wadding roll 4 already put on in FIG. 3 is rotated clockwise by the driven winding rolls 2, 3, whereby the not yet prepared winding start reaches the area of the preparation device 40 or the suction channel 41.
  • the negative pressure generated during the rotational movement of the winding 4 in the suction channel 41 has the effect that the beginning of the winding of the new winding 4 is drawn into the channel 41 when it reaches the area of the suction opening 49.
  • a sensor 48 installed in the suction channel 41 detects the pulling in of the start of the winding into the suction channel 41. As soon as the sensor 48 triggers the signal "cotton wool present", the clamping part 42 is actuated via the cylinder 43 and clamps the unprepared cotton wool beginning of the cotton roll 4 to it Wall part 45 of the suction channel 41 fixed.
  • the drive of the winding rollers 2, 3 is reversed, as a result of which the winding 4 rotates counterclockwise.
  • the winding 4 is now rotated through a predetermined angle of rotation, as a result of which the new wadding beginning held in place by the clamping part 42 is separated and a new and prepared wadding beginning 9 is thereby formed.
  • the rotational movement of the winding 4 counterclockwise is at least to the extent that the new wadding beginning 9 is pressed against the outer periphery P of the winding 4 via the winding roller 3, so that this does not move automatically from the winding 4 when the direction of rotation is reversed on the way to the front winding roller 2 solves.
  • the suction channel 41 can be pivoted into a lower position shown in dash-dotted lines in order to tear off the unprepared cotton end.
  • the torn end of the wadding is sucked off via the suction tube 50 after opening of the clamping part 42 and, after the suction device has been stopped, the direction of rotation of the winding 4 or the drive of the winding rollers 2, 3 is reversed again.
  • the winding 4 rotates again clockwise, as a result of which the newly prepared cotton wool beginning 9 reaches the area of the detaching device 8.
  • the nozzle 10 of the detaching device 8 is pivoted from a lower position shown in broken lines to an upper position via a cylinder 2.
  • the nozzle 10 is supplied with compressed air from the compressed air source 30 via the compressed air line 20 and via the distributor pipe 18 and its outlet openings 19.
  • This compressed air now emerges at the air outlet slot 16 and generates an air flow S along the guide plate 17.
  • the air pressure in the distributor pipe 18 is of the order of 6 bar.
  • the compressed air is then switched on when the front end of the wadding 9 has passed the air outlet slot 16 of the tubular nozzle 10 with the detaching device 8 pivoted up and is at a certain distance from the latter. This process is precisely controlled by the control unit 52.
  • the exact time of the compressed air supply is decisive for the gentle removal of the cotton wool beginning 9. If the compressed air supply is too early, ie if If, for example, the front edge of the cotton wool beginning 9 is at the level of the outlet opening 16, the previously prepared cotton wool beginning can be changed negatively by the air currents which arise, and its tips can also fold backwards. If the compressed air supply is too late, there is a risk that the wadding start 9 will no longer be detached from the winding 4.
  • the air flow S applied along the guide plate 17 creates a vacuum space U and, due to the entrained ambient air between the periphery P of the roll and the guide plate 17, an air flow along the roll 4 (against its unwinding direction), as a result of which the wadding 9 detaches from the roll 4 and based on the existing pressure conditions due to the air flow S on the guide plate 17.
  • an interface layer of not precisely defined air speed is formed due to the friction between the air jet and the guide surface.
  • the cotton "floats" on this boundary layer so that there is practically no friction between the cotton and the guide surface.
  • the nozzle 10 is pivoted downward by means of the cylinder 22 via the swivel arms 11, 12. During this pivoting movement, the pressure roller 25 of the attachment point 23 is lifted off the lower roller 24.
  • the front edge of the wadding start 9 is displaced along the guide plate 17 to the end thereof.
  • the immediate swiveling of the nozzle 10 after loosening the wadding beginning 9 is therefore important to prevent the front edge of the wadding beginning 9 due to the between the end region of the guide surface 17 and the periphery P des Wind up 4 arising turbulence and possibly folded back.
  • the wadding end 9 is transferred between the nip point of the roller 24 and the raised printing roller 25 and at the same time is placed on the wiping end 26 of the wadding.
  • the amount of pressure of the applied compressed air can be reduced.
  • the pressure roller 25 is lowered again, as a result of which the new cotton end 9 connects to the outgoing cotton end 26.
  • the subsequent wad processing device e.g. Combing device 28, including the cotton feed device 32 started again and the supply of compressed air in the nozzle 10 interrupted.
  • the cotton is now continuously fed back to the subsequent cotton processing device via the guide plate 31.
  • FIG. 8 shows a perspective illustration of FIG. 1, with the illustration of all parts which are shown in FIG. 1 being omitted for reasons of clarity.
  • the suction device 50 or the compressed air line 20 could also be attached on both sides.
  • the cylinders 22 and 46 could also be attached to the opposite swivel arms 12 and 39, respectively. 8 shows in particular that the detaching device 8 or the nozzle 10 extends over the entire width B of the roll 4.
  • FIG. 9 shows a further variant of the nozzle 10 corresponding to the representation according to FIG. 2.
  • the nozzle is designed as a square tube and the air outlet slot 16 is located between the guide plate 17 and a guide rod 54 with a corresponding cross section, which is fixed on the guide plate 17 is attached.
  • the guide plate 17 and the nozzle 10 are provided with slots 55 which together form a passage to the air outlet slot 16 for supplying the compressed air.
  • the mode of operation corresponds to that already listed under FIG. 2.

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

Claims (16)

  1. Procédé pour détacher un début de nappe (9) d'un rouleau de nappe (4),
    caractérisé par le fait
    qu'un courant d'air (S) est produit sur au moins la largeur de nappe (B) et à une distance par rapport à la périphérie (P) du rouleau de nappe (4), courant d'air qui est guidé à peu près tangentiellement et dans le sens de déroulement par rapport au rouleau de nappe (4).
  2. Procédé selon revendication 1,
    caractérisé par le fait que
    le début de nappe (9) détaché est guidé dans une position prédéterminée et transféré dans une réception (23) faisant suite.
  3. Procédé selon revendication 1 ou 2,
    caractérisé par le fait que
    le courant d'air (S) est formé par de l'air s'écoulant sur une surface plane.
  4. Procédé selon l'une des revendications 1 à 3,
    caractérisé par le fait que
    la vitesse d'air du courant d'air (S) peut étre variée.
  5. Procédé selon revendication 4,
    caractérisé par le fait que
    la vitesse d'air du courant d'air (S) est diminuée après le détachement du début de nappe (9).
  6. Dispositif pour détacher un début de nappe (9) d'un rouleau de nappe (4),
    caractérisé par le fait
    qu'une buse (10) est disposée au moins sur la largeur de nappe (B) et à une distance par rapport à la périphérie (P) du rouleau de nappe, avec une ou plusieurs ouvertures de sortie d'air (16) dirigées à peu près tangentiellement et dans le sens de déroulement (A) par rapport au rouleau de nappe (4).
  7. Dispositif selon revendication 6,
    caractérisé par le fait que
    l'ouverture de sortie est formée comme une fente de sortie d'air (16) s'avançant sur au moins la largeur de nappe (B).
  8. Dispositif selon revendication 6,
    caractérisé par le fait que
    les ouvertures de sortie d'air sont disposées comme des trous situés à faible distance l'un par rapport à l'autre dans la buse, sur au moins la largeur de nappe (B).
  9. Dispositif selon l'une des revendications 6 à 8,
    caractérisé par le fait que
    la buse (10) est pourvue d'une surface de guidage (17) en prolongation des ouvertures de sortie d'air (16).
  10. Dispositif selon revendication 9,
    caractérisé par le fait que
    la surface de guidage (17) est fixée sur la buse (10) d'une manière à peu près parallèle au courant d'air (S) sortant des ouvertures de sortie d'air (16), de telle sorte que le courant d'air (S) se situe entre la périphérie (P) du rouleau de nappe (4) et la surface de guidage (17).
  11. Dispositif selon l'une des revendications 6 à 10,
    caractérisé par le fait que,
    par rapport à la périphérie (P) du rouleau de nappe (4) se trouvant dans la position de détachement, la distance (X) des ouvertures de sortie d'air (16) est plus grande que la plus petite distance (Y) de la buse (10).
  12. Dispositif selon l'une des revendications 6 à 11,
    caractérisé par le fait que
    la buse (10) est disposée d'une manière mobile.
  13. Dispositif selon revendication 12,
    caractérisé par le fait que
    la buse (10) est maintenue d'une manière pivotante à l'aide de bras de pivotement (11, 12).
  14. Dispositif selon revendication 13,
    caractérisé par le fait que
    le rouleau de nappe (4) est porté par deux cylindres dérouleurs de nappe (2, 3), et les bras de pivotement (11, 12) de la buse (10) sont maintenus sur l'axe (13) du cylindre dérouleur de nappe de devant (2).
  15. Dispositif selon l'une des revendications 9 à 14,
    caractérisé par le fait que,
    dans la zone de ses côtés étroits, la surface de guidage (17) est pourvue de chaque côté de guides latéraux (53) se dirigeant vers la périphérie (P) du rouleau de nappe (4).
  16. Dispositif selon l'une des revendications 6 à 15,
    caractérisé par le fait
    qu'au moins la commande (29) d'une source d'air comprimé (30) pour la production du courant d'air (S), l'entraînement (7) des cylindres dérouleurs de nappe (2, 3), mettant en rotation le rouleau de nappe (4) pour le déroulement, ainsi qu'un arrangement de positionnement (22) pour le pivotement de la buse (10) sont reliés ensemble en ce qui concerne la mise en action.
EP91117548A 1990-10-22 1991-10-15 Dispositif de détachement de la nappe Expired - Lifetime EP0482475B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3368/90 1990-10-22
CH3368/90A CH681894A5 (fr) 1990-10-22 1990-10-22

Publications (2)

Publication Number Publication Date
EP0482475A1 EP0482475A1 (fr) 1992-04-29
EP0482475B1 true EP0482475B1 (fr) 1994-04-06

Family

ID=4254460

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91117548A Expired - Lifetime EP0482475B1 (fr) 1990-10-22 1991-10-15 Dispositif de détachement de la nappe

Country Status (5)

Country Link
US (1) US5337456A (fr)
EP (1) EP0482475B1 (fr)
JP (1) JP2696018B2 (fr)
CH (1) CH681894A5 (fr)
DE (1) DE59101323D1 (fr)

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JP2645421B2 (ja) * 1988-05-18 1997-08-25 株式会社原織機製作所 ラップを自動継ぎする方法と装置
DE3835452C1 (fr) * 1988-10-18 1990-05-10 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern, De
CH676249A5 (fr) * 1988-11-03 1990-12-28 Rieter Ag Maschf
US5077865A (en) * 1989-11-03 1992-01-07 Rieter Machine Works, Ltd. Comber lap joining device with suction head for preparing ends
US5027475A (en) * 1989-11-03 1991-07-02 Rieter Machine Works, Ltd. Method and apparatus for automatic piecing of comber laps
CH679488A5 (fr) * 1989-06-01 1992-02-28 Rieter Ag Maschf
JP2676554B2 (ja) * 1989-07-10 1997-11-17 ティーオーエー株式会社 短縮機能付きポケット・ページャ
CH681627A5 (fr) * 1989-08-29 1993-04-30 Peyer Ag Siegfried
CH680670A5 (fr) * 1990-01-17 1992-10-15 Rieter Ag Maschf
JPH04306325A (ja) * 1991-04-01 1992-10-29 Komatsu Ltd ホイールローダの組立方法

Also Published As

Publication number Publication date
JPH04257324A (ja) 1992-09-11
US5337456A (en) 1994-08-16
DE59101323D1 (de) 1994-05-11
CH681894A5 (fr) 1993-06-15
EP0482475A1 (fr) 1992-04-29
JP2696018B2 (ja) 1998-01-14

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