EP0374541A2 - Procédé de nettoyage d'un ruban de cardage - Google Patents

Procédé de nettoyage d'un ruban de cardage Download PDF

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Publication number
EP0374541A2
EP0374541A2 EP89121978A EP89121978A EP0374541A2 EP 0374541 A2 EP0374541 A2 EP 0374541A2 EP 89121978 A EP89121978 A EP 89121978A EP 89121978 A EP89121978 A EP 89121978A EP 0374541 A2 EP0374541 A2 EP 0374541A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
perforated
card sliver
guide surface
sliver
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.)
Withdrawn
Application number
EP89121978A
Other languages
German (de)
English (en)
Other versions
EP0374541A3 (fr
Inventor
Robert Demuth
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 EP0374541A2 publication Critical patent/EP0374541A2/fr
Publication of EP0374541A3 publication Critical patent/EP0374541A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers
    • D01G15/465—Doffing arrangements for removing fibres using, or cooperating with, pneumatic means

Definitions

  • the invention relates to a method and an apparatus for cleaning a card sliver.
  • the object of the present invention is to provide a cleaning method or a cleaning device which, with minimal effort and without complicating the production process as a whole, ensures cleaning of the card sliver, which typically takes place between the exit of the card, in particular after the step rollers, and the sliver deposition should.
  • this object is achieved procedurally in that the card sliver is guided around at least one convexly curved, perforated guide surface, which causes the belt to spread and loosen and that a gas stream, preferably an air stream, is generated through the perforated guide surface in order to loosened tape to remove existing loose impurities as well as dirt and dust particles.
  • the method according to the invention therefore aims at spreading and loosening the band by guiding this band around a convex curved guide surface, so that on the one hand the impurities contained in the band itself are loosened somewhat, i.e. the bond to the fibers is reduced, while the tape itself is made more permeable to the air flow, so that the cleaning effect of the air flow also increases.
  • the card sliver is a relatively weak structure, it has sufficient strength, at least after compression in the stepped rollers, to be pulled and blown over a convexly curved guide surface without the connected sliver being destroyed and without a significant number of Fibers from this fiber structure are lost.
  • the gas stream penetrating through the card sliver is preferably suctioned off so that the loosened dirt or any fibers released do not contaminate the machine area.
  • the card sliver is preferably several aspi vexed convex guiding surfaces. In this way it is possible to clean the card sliver several times within a relatively short distance and a common suction device can be used, so that the total expenditure can be kept within limits.
  • a particularly preferred device for carrying out the method is characterized in that the perforated guide surface is formed by a perforated cylinder rotating around in operation, within which a body having a gas outlet opening and guiding the gas flow is provided, the gas outlet opening being arranged in the region, where the band wraps around the cylinder.
  • the cylinder be driven by the gas flow, for example by forming one end of the cylinder as a turbine, which is due to the low forces required by simple blade surfaces and targeted blowing nozzles can be done.
  • a suction device is preferably in the loop rich and provided on the side of the card sliver facing away from the cylinder.
  • This suction device can be used for a dual purpose in that it not only removes the dirt released from the card sliver, but also partially or completely ensures the generation of the gas flow. More specifically, there are three ways to generate the gas stream. Either one blows gas through the body, or one creates the pressure difference required for the gas flow through the suction device, or one uses a combination of bubbles and suction by applying pressure gas from a pressure gas source to the body guiding the gas flow as well as through the suction device generates a suction effect.
  • a plurality of perforated cylinders are preferably provided in a row in the direction of belt travel, which are partially wrapped around in a serpentine fashion, and a suction device is provided on at least one side and preferably on both sides of the cylinder.
  • the suction device can have the shape of a box through which the card sliver runs, which surrounds the row of cylinders and has a suction connection.
  • the or each suction device can have the shape of an elongated trough, which tapers in the direction of movement of the card sliver or in the opposite direction and is arranged with its open side facing the sliver.
  • the suction connection is provided at the wide end of the trough.
  • the open side of the trough is only open where the belt runs between the cylinder and the trough. This means that there is no unnecessary suction on the back of the cylinder where there is no flow through the belt.
  • the or each cylinder is designed to carry out vibrations, for example axial and / or radial vibrations and / or that the Gas flow is a pulsating gas flow.
  • FIG. 1 shows a card sliver 10 which is deflected from the direction of the arrow 12 into the direction of the arrow 13 around a guide surface formed by a perforated cylinder 11.
  • a perforated cylinder 11 Within the perforated cylinder 11 there is a stationary body 14 which has a guide channel 15 for compressed air.
  • the body is provided in the deflection area 16 of the card sliver with a gas outlet mouth 17 which is determined by two surfaces 18 and 19 which form an angle and are approximately radial to one another.
  • the air supply duct 15 communicates with this air outlet opening via a slit-like duct section 21.
  • the thickness of the card sliver is reduced from the initial thickness D during the deflection to a thickness d and, after leaving the cylinder, reaches the original thickness D again.
  • the belt is spread in the direction perpendicular to the plane of the drawing, which on the one hand increases the air permeability, and on the other hand the spreading movement also loosens any dust and dirt particles contained in the card sliver contributes.
  • the air flowing out through the mouth 17 penetrates the sliver in the deflection area and removes loose dirt and dust particles.
  • the cylinder 11 is driven only by friction with the card sliver itself. It slides, so to speak, on the partially cylindrical back of the body 14.
  • the cylinder 11 is driven, which can be achieved, for example, by approximately radially standing blades on one end face of the cylinder and interacting with blowing nozzles that can be fed by the channel 15.
  • the air penetrating through the card sliver can and is normally removed by a suction device which covers or encloses the deflection region 16 of the sliver. It is also obvious that the gas flow, which is represented by the arrows 22, can be generated either by connecting an air source to the duct 15, or by a suction device, as previously described, or by a combination of these two possibilities.
  • FIG. 2 shows a preferred embodiment of the device according to the invention.
  • the strip coming from the card first passes through a hopper 23 and then through a pair of stepped rollers 24.
  • the somewhat compressed card sliver is guided in a serpentine manner around four cylinders arranged in a row. These can be designed as shown in Fig. 1, only with the difference that the mouth of the respective inner body always faces the deflection area of the card sliver on the associated cylinder.
  • the strip After leaving of the fourth cylinder 11.4, the strip passes through a hopper 250 and a pair of rollers 25, 25.1, which is preferably designed as a pair of stepped rollers, to a strip deposit, which is indicated schematically, but not to scale, by the reference number 26.
  • suction devices 27 are provided, which are essentially of the same design.
  • the lower suction device is approximately in the form of an open trough, which tapers in the belt running direction along the row of cylinders, ie in accordance with the arrow 28.
  • the open side 29 of the trough faces the row of cylinders.
  • cover plates since no extraction is required here and in this way false air flows are avoided and therefore the desired high air flow speed is achieved with moderate suction power.
  • the suction support 33 is arranged in the lower region of the trough, so that dirt and dust particles are also transported there by gravity.
  • the overall arrangement is also inclined, so that the rear of the trough serves as a kind of slide for dirt particles falling out there.
  • the suction connection is brought to the upper end instead of at the lower end, especially when it is possible to work with higher air flow speeds, so that the risk of dirt particles falling out in front of the suction connection is not to be feared.
  • the upper trough 27 is configured similarly to the lower one, the only difference, apart from the other orientation, is that the cover areas 35, 36 are arranged somewhat differently. This difference could be avoided if the upper trough 27 were arranged that the suction port would come up, as shown in broken lines in Fig. 2.
  • FIG. 3 shows a somewhat modified embodiment, in which, while maintaining the row arrangement of four cylinders, these are accommodated in a suction box 38.
  • the belt passes through two guides 39, 41 at the entrance and exit ends of the box.
  • the suction nozzle 42 is provided at the lower end of the inclined box, but could also be at the upper end or just in the middle.
  • the arrows 22 also show the directions in which the air emerges from the individual cylinders 11.1 to 11.4.
  • the dashed lines 43 indicate how the box is made in two parts so that it can be opened to allow access to the cylinders.
  • the gas-carrying bodies 14 of the cylinders 11.1 to 11.4 can extend somewhat beyond the ends of the rotatable cylinders and are held with their ends in semicircular receptacles in the two halves of the box 38, for example by the fact that the gas-carrying bodies have circumferential grooves in which the side edges of the box engage.
  • the cylinders are properly fixed, and when opening the box, the individual cylinders with the bodies can be easily removed, for example, to allow easy insertion of the card sliver.
  • the introduction of the card sliver is such that the cylinders 11.1 and 11.3 are first arranged in the lower part of the box.
  • the card sliver is placed over these two cylinders and the cylinders 11.2 and 11.4 are also arranged in the lower part of the box 38, so that the card sliver assumes the desired serpentine course. Then the upper part of the box is put on and fixed in its final position, for example by clips. The arrangement can then be operated be taken.
  • FIG. 4 and 5 show a perforated cylinder 50, which is covered by a suction hood 51 in the deflection area 16 (see FIG. 1, not marked here) of the card sliver 10, namely with a width B which is larger than the width (not marked) of the card sliver 10.
  • the suction hood 51 serves for sucking in aspiration air which flows according to the arrows shown into the cavity of the cylinder 50 and through the perforation holes 52 and through the card sliver 10 into the suction hood 51.
  • An adjustable throttle valve 53 is provided in the exhaust hood 51 to regulate the amount of air extracted.
  • the cylinder 50 is rotatably and driveably mounted about the axis of rotation R.
  • the perforation holes 56 are only provided within the deflection area of the card sliver 10.
  • the cylinder 55 is covered in the same way by the suction hood 51 already shown in FIGS. 4 and 5.
  • the cylindrical surface of the perforated cylinder 55 is advantageously treated in the deflection area of the card sliver 10 by a surface treatment which results in a so-called orange peel.
  • the card sliver slides better on such a surface than on an untreated or too smooth surface.
  • the air drawn in has an inflow direction shown by the arrows.
  • FIG. 8 shows a detail of a variant of the perforation from FIG. 7, in which the perforation holes 56.1 are not arranged radially but, as shown in FIG. 8, have a direction inclined in the direction of movement of the card sliver 10.
  • the direction of movement is indicated by arrow 57.
  • the inflowing air represented by an arrow 58 not only has the task of removing dust and dirt from the card sliver 10, but also of conveying it in the conveying direction 57.
  • at least a smaller tensile force must be provided on the card sliver in order to convey it in the conveying direction 57.
  • FIG. 9 shows the use of either the perforated cylinder of FIGS. 4 and 5 and / or of FIGS. 6 and 7, in particular in combination with the perforation holes 56.1 of FIG. 8. The latter in particular when only cylinder 55 is used will.
  • each cylinder is sucked through the suction hood 51, which is assigned to a negative pressure source (not shown).
  • deflection rollers 59 can be provided.
  • deflecting rollers are advantageously rotating and driving stored in cash.
  • the cylinder 50 respectively. 55 advantageously move in such a way that the first cylinder in the conveying direction 57 of the card sliver 10 is a driven cylinder 50 and the next one is a stationary cylinder 55, then again a driven cylinder 55 and finally a stationary cylinder 50.
  • the throttle valves 53 allow separate and / or common control of the flows through the individual flow areas of the belt.
  • FIGS. 10 and 11 show a perforated cylinder 60 which is rotatably mounted in a stationary housing part 63 by means of a ball bearing 62 and is driven by a belt 64.
  • This type of rotatable mounting and type of drive can be used for all cylinders shown so far and described below.
  • a stationary perforated part 61 is provided, the perforation holes 65 of which are congruent with the perforation holes 66 of the rotatable cylinder 60.
  • the stationary perforated part 61 is part of an injection element 67, which is either open to the atmosphere to allow intake air to flow in, or is connected to a compressed air source to pressurize compressed air through the perforation holes 65 and 65, respectively. 66 to blow.
  • FIG. 12 likewise shows perforation holes 65.1 inclined in the same direction.
  • the kinetic energy of the air flow in the perforation hole 65.1 can thus be used in order to be used for driving the rotatable cylinder 60 by means of the deflection in the radial direction of the perforation holes 66. This eliminates the need for the belt drive 64.
  • the inclination of the perforation holes 65.1, as well as the pressure of the flow and the amount of air to be blown through must be determined by tests on the one hand for the purpose of driving the cylinder 60 and on the other hand for the purpose of cleaning the card sliver 10. be coordinated.
  • FIG. 13 shows a variant of the application of the method in which the carding belt 10 is moved in the conveying direction 57 between a perforated conveyor belt 70 and a stationary perforated plate 71.
  • a suction hood 72 is provided within the conveyor belt 70 such that air can flow through the carding belt area, which lies above the perforation area of the plate 71, without an unacceptable proportion of false air is also suctioned through the suction hood 72.
  • the suction hood 72 has suction openings 73 which open into a vacuum source, for example a fan.
  • the plate 71 can be provided with vibrators 74 of high frequency and a small stroke in order to achieve a knocking effect on the card sliver 10, which has already been described, which makes it easier for the dust and dirt parts to be extracted from the card sliver.
  • the card sliver at the entrance of the conveyor belt 70 can be guided around a rounded edge 75 of the plate 71, so that the sliver 10 is caused to spread by guiding the sliver 10 around a rounded edge 75, which also improves removal of dust and dirt in connection with the suction.
  • This perforated roller 77 serves the purpose of detaching the sliver 10 from the perforated conveyor belt.
  • the perforated deflecting roller has a blow channel 78 inside, which is connected via an inlet connection 79 to a compressed air source (not shown).
  • the blowing channel covers the perforation of the deflection roller 77 in an area in which the fiber sliver 10 touches the deflection roller 77.
  • the plate 71 has perforation holes 80.1, which are arranged inclined in the conveying direction 57 of the sliver 10. This measure supports the conveying of the sliver 10 on the plate 71.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP19890121978 1988-12-23 1989-11-29 Procédé de nettoyage d'un ruban de cardage Withdrawn EP0374541A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3843655 1988-12-23
DE3843655A DE3843655A1 (de) 1988-12-23 1988-12-23 Verfahren zur reinigung eins kardenbandes

Publications (2)

Publication Number Publication Date
EP0374541A2 true EP0374541A2 (fr) 1990-06-27
EP0374541A3 EP0374541A3 (fr) 1991-12-18

Family

ID=6370109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890121978 Withdrawn EP0374541A3 (fr) 1988-12-23 1989-11-29 Procédé de nettoyage d'un ruban de cardage

Country Status (4)

Country Link
US (1) US5031280A (fr)
EP (1) EP0374541A3 (fr)
JP (1) JPH02221421A (fr)
DE (1) DE3843655A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ297922B6 (cs) * 2000-03-29 2007-05-02 SLIVER MACHINE, akciová spolecnost Zpusob a zarízení pro kontrolu a regulaci hmotnosti pramene vláken
CN107130357A (zh) * 2017-06-30 2017-09-05 湖州南浔洲乾毛纺有限公司 一种多功能毛纺面料收卷装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL101168A0 (en) * 1992-03-06 1992-11-15 Shlomo Sterin Apparatus for sorting fibers
DE50201372D1 (de) * 2002-12-19 2004-11-25 Reifenhaeuser Masch Vorrichtung für die Ablage und Förderung einer Vliesbahn aus Kunststofffäden
TWI385036B (zh) * 2007-05-11 2013-02-11 Hon Hai Prec Ind Co Ltd 除塵裝置
CN107938040B (zh) * 2017-12-21 2023-11-21 江苏凯宫机械股份有限公司 高速智能条并卷机棉层控制机构

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US2274425A (en) * 1940-06-12 1942-02-24 Miller Jonas Holding Co Inc Method of making slivers
US2274424A (en) * 1940-06-12 1942-02-24 Miller Jonas Holding Co Inc Sliver making machine
DE1179837B (de) * 1957-08-22 1964-10-15 Kan Ichi Kawashima Verfahren und Vorrichtung zum Ausrichten der auf dem Abnehmer einer Krempel befindlichen Fasern
DE1234596B (de) * 1960-06-28 1967-02-16 Daiwa Spinning Co Ltd Krempel
GB731077A (en) * 1960-11-02 1955-06-01 Stearns & Foster Company Improvements in or relating to carding machines and methods of carding fibers
US3307227A (en) * 1965-04-19 1967-03-07 Jefferson Mills Inc Method and apparatus for cleaning cotton
AT344552B (de) * 1976-02-02 1978-07-25 Fehrer Ernst Gmbh Vorrichtung zum spinnen textiler fasern
AT338666B (de) * 1976-02-17 1977-09-12 Fehrer Ernst Gmbh Vorrichtung zum spinnen textiler fasern
US4127920A (en) * 1977-10-14 1978-12-05 Luwa Ag Apparatus for feeding a textile fiber band composed of staple fibers
WO1980000981A1 (fr) * 1978-11-03 1980-05-15 Platt Saco Lowell Ltd Appareil pour enlever les poussieres des machines textiles
US4274178A (en) * 1979-03-28 1981-06-23 Kabushiki Kaisha Kyowa Kikai Seisakusho Device for stripping a fibrous web from a doffer in a carding machine
EP0050933A1 (fr) * 1980-10-24 1982-05-05 Hollingsworth (U.K.) Limited Dispositif de dépoussiérage pour bancs d'étirage
US4475272A (en) * 1983-02-07 1984-10-09 Rando Machine Company Sliver forming condenser
IN171142B (fr) * 1987-03-19 1992-08-01 Japan Cotton Technical And Eco

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ297922B6 (cs) * 2000-03-29 2007-05-02 SLIVER MACHINE, akciová spolecnost Zpusob a zarízení pro kontrolu a regulaci hmotnosti pramene vláken
CN107130357A (zh) * 2017-06-30 2017-09-05 湖州南浔洲乾毛纺有限公司 一种多功能毛纺面料收卷装置
CN107130357B (zh) * 2017-06-30 2018-10-02 湖州南浔洲乾毛纺有限公司 一种多功能毛纺面料收卷装置

Also Published As

Publication number Publication date
US5031280A (en) 1991-07-16
DE3843655A1 (de) 1990-07-05
EP0374541A3 (fr) 1991-12-18
JPH02221421A (ja) 1990-09-04

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