EP0565486A1 - Rectification controlée d'une garniture de carde - Google Patents

Rectification controlée d'une garniture de carde Download PDF

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Publication number
EP0565486A1
EP0565486A1 EP93810221A EP93810221A EP0565486A1 EP 0565486 A1 EP0565486 A1 EP 0565486A1 EP 93810221 A EP93810221 A EP 93810221A EP 93810221 A EP93810221 A EP 93810221A EP 0565486 A1 EP0565486 A1 EP 0565486A1
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EP
European Patent Office
Prior art keywords
machine according
textile machine
sensor
grinding
working
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.)
Granted
Application number
EP93810221A
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German (de)
English (en)
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EP0565486B1 (fr
EP0565486B2 (fr
Inventor
Peter Fritzsche
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
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Maschinenfabrik Rieter AG
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Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0565486A1 publication Critical patent/EP0565486A1/fr
Publication of EP0565486B1 publication Critical patent/EP0565486B1/fr
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Publication of EP0565486B2 publication Critical patent/EP0565486B2/fr
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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
    • D01G15/36—Driving or speed control arrangements
    • D01G15/38—Driving or speed control arrangements for use during the grinding of card clothing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/16—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding sharp-pointed workpieces, e.g. needles, pens, fish hooks, tweezers or record player styli
    • B24B19/18—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding sharp-pointed workpieces, e.g. needles, pens, fish hooks, tweezers or record player styli for grinding carding equipment, e.g. card-clothings

Definitions

  • the invention relates to a textile machine (for example a card) with a working element (for example a clothing) which has a decisive influence on the quality of the product of the machine, but whose condition deteriorates with increasing operating time (for example because of wear), which has a corresponding effect exerts the product quality.
  • the textile machine is provided with a maintenance system that can be used during machine operation to counteract the deterioration of the condition of the work element.
  • a textile machine (namely a card) of the type described above is shown in EP 322637. It has been suggested that the maintenance means should be in constant use in order to constantly achieve the optimal quality. "Continuous” is to be understood in the sense that a grinding system or device is installed in the machine and is therefore always ready for operation (even while the machine is in operation) and not that grinding is carried out continuously during operation.
  • a sharpening stone according to CH 267/91 can be moved into an end position (Fig. 3 or Fig. 7) that lies outside the working width of the card (the axial length of the clothing). The arrival of the grindstone in this end position is reported to a controller by a sensor.
  • the grinding according to CH 267/91 can either be in operation, i.e. be carried out during carding or after the card has run out.
  • the waiting times between grinding periods must be determined empirically according to CH 267/91.
  • FIG. 1 merely shows the surface 12 of the reel 10.
  • a set (not shown) is fitted onto this surface 12, which is equipped with teeth and thus has a predetermined tip density (number of tips per unit area). This is indicated for only part 14 of the drum surface - but the drum is equipped with tips over its entire working width AB.
  • the drum turns on its axis (not shown), which means a movement of the teeth in the direction of arrow P.
  • the grindstone 16 according to CH 267/91 is shown in its end position L.
  • the aforementioned sensor is shown at 18.
  • a drive motor 20 and a drive transmission means (not shown, for example a belt, the rail of a linear motor, a threaded spindle, etc.) and a holder (not shown) for the stone 16
  • the stone 16 can move in a direction perpendicular to the direction of movement P via the entire working width AB can be moved.
  • the drum continues to rotate.
  • the dimension of the grindstone in its own direction of movement and its speed of movement can be selected in comparison to the speed of movement of the clothing teeth in the direction P such that during a lifting movement of the grinding stone from one side to the other of the drum, each tooth of the clothing a few times (e.g. 4 to 8 times) comes into contact with the grindstone.
  • a single stroke movement (from one side of the reel to the other) is sufficient to "grind” all teeth, ie to exert a certain grinding effect. If this grinding effect is considered sufficient for certain purposes (as will be described later), a second layer L2 can be removed from the end position L on the side of the drum be provided where the grindstone 16 can be without touching the clothing (waiting point).
  • the operating phase begins and ends in the one or one end position (waiting point) - it accordingly contains a predetermined number (at least one) of lifting movement from side to side of the working width.
  • the duration of the operating phase depends on the number of strokes and the speed of movement of the grindstone.
  • the duration of the standby phase is determined according to criteria which are described below.
  • Fig. 2 shows schematically the drum 10, briseur 22, customer 24 and the grinding system, which is indicated as a whole by the reference numeral 26.
  • the system 26 comprises the grindstone 16 (FIG. 1), its holder (not shown), the drive motor 20 (FIG. 1) and the guide means (not shown) which guides the grindstone holder during a lifting movement.
  • Fig. 2 also shows the drive motor 30 for the card, which the drum 10 e.g. set in rotation via a toothed belt 32 when the card is in operation.
  • the motor 30 is controlled by signals from a card control 34 and reports its status back to this control 34.
  • the card control 34 also controls the grinding system 26, it being assumed in the example shown that the grinding system is provided with its own "sub-control" 36, which carries out certain control functions autonomously on the basis of control commands from the main control 34.
  • the main controller 34 is provided with a display 38 and a keyboard 40 for human-machine communication.
  • This controller 34 also includes a time signal generator, which is indicated schematically at 42.
  • each operating phase must of course include a certain number of double strokes (back and forth movements) from the end position.
  • FIG. 3 is a timing diagram and is used to explain the duration of the standby phase. This diagram is not to be understood as a realistic representation of reality but as a purely fictitious diagram to explain principles.
  • Fig. 3 the time is plotted on the horizontal axis and the tooth wear on the vertical axis.
  • the "curve” K1 represents the increasing tooth wear during a period T1 of uninterrupted operation with a predetermined drum speed and a certain processed material.
  • the “wear” is to be understood here as tooth wear, which leads to an impairment of the functionality of the tooth as a carding element. This is explained in more detail below with reference to FIG. 4. Under other operating conditions (drum speed, processed material) the wear is slower (e.g. after curve K2) or even faster (not shown), which leads to a steeper curve.
  • the operating time t (without using the grinding system) is the standby period of the grinding system 26 equal. During this period, the grindstone waits in its end position or is ready for use in this end position.
  • the period of time t can be entered by the operator into the controller 34 via the keyboard 40 (and can be called up again for checking purposes via the display 38).
  • the "optimal" conditions can first be determined by test settings, and the determined values can then be firmly entered for normal operation.
  • the "optimal" waiting period t decreases over the service life of a given set (i.e. until the card is refinished), i.e. the duration of this waiting period will often prove to be a function of the total operating time of the set.
  • This can be taken into account by the controller 34 by means of an operating hours counter (not shown) and messages from both the engine 30 and the time signal generator 42.
  • the motor 30 (which drives the drum) is only shown as an example as a source for the signals which drive the operating hours counter. Such signals could e.g. be removed from the customer drive and would therefore have a closer relationship to the material flow.
  • the correct function of the operating time and a start signal after re-garnishing must be entered by the operator, after which the control 34 is able to determine the correct times for the use of the grinding system.
  • the controller 34 sends a start signal to the sub-controller 36 in order to trigger the use of the grinding system. The subsequent use will now be explained with reference to FIG. 4.
  • Fig. 4 shows diagrammatically two teeth 50, 52 of a set and the direction of movement P (see also Fig. 4).
  • the work of the tooth is done at the top S and the wear at this point is decisive for the product quality.
  • Carding technology product quality is dependent on the sharpness of the tip on the leading edge of each tooth 50, 52, etc.
  • the tooth height is reduced in order to restore a sharp tip S1, S2 etc. on the front edge with every grinding operation. This can continue to a very low tooth height e.g. to the tip Sn (Fig.4), where the tip is in the transition to the next tooth.
  • the duration of the grinding operation or the work required for this depends on the tooth height, i.e. of the tooth cross-sectional area that has to be machined during grinding. This area is a function of the length 11, 12, 13 ..In etc. (Fig.4), which increases with each grinding operation. As previously indicated, each grinding of a given set results in a subsequent operating period without grinding, the duration of this period decreasing with the number of grinding operations carried out. With "classic" grinding (without a built-in grinding system), the work is normally no longer worthwhile, long before the tooth height has been reduced to the theoretical minimum value.
  • an increase in the amount of labor required to perform a sequence of grinding operations can be realized by a corresponding increase in the number of strokes per grinding operation (and still without interrupting production).
  • the system only reaches its limit where it has to be continuously driven at minimum operating speed (and / or with maximum adjustable contact pressure).
  • the number of stroke movements per operating phase and the change with the total operating time of a given set can also be entered by the operator via the keyboard 40.
  • the number of movements per grinding operation is then forwarded from the controller 34 to the controller 36 as a control command.
  • the drum 10 can be ground at full production speed. However, it may be necessary to change the drum speed for grinding compared to the production speed, e.g. to reduce. This can be effected by the controller 34 by means of a suitable control command to the motor 30.
  • the motor 30 (or its "local” control) is constructed in such a way that it operates at discrete, predetermined speeds, it is possible to switch from the (or a) production speed to a "grinding speed". If the speed of the motor 30 (e.g. by means of a frequency converter) can be continuously adjusted within predetermined limits, the controller 34 determines an output frequency of the converter, which results in a suitable grinding speed of the reel.
  • the controller 34 can be programmed such that it only controls the use of the grinding system when the grinding speed of the motor 30 is reached.
  • Fig. 5 shows a modified arrangement that can work as a self-adjusting machine. Since the Ma machine itself (including its built-in grinding system) has not been changed compared to FIG. 2, the machine parts and the system 26 (with its "local" control 36) are indicated with the same reference symbols in both figures. 5 is a sensor (or a sensor arrangement) 54 which (or which) checks the product 56 of the card 40. The (or each) sensor 54 responds to a quality parameter that depends on the condition of the clothing 12 (FIG. 1), for example on the number of nits.
  • a nit sensor for use in the output of a card is known, for example, from DOS 3928279 or CH 669401 (or US 4953265).
  • the quality sensor could face the drum or the customer i.e. Check the quality of the product directly on the rotating machine element (e.g. number of nits).
  • tooth wear teeth shape
  • a brightness sensor could, for example, be worn by the drum carrier to measure the brightness of the continuous clothing surface, this brightness changing with tooth wear.
  • a distance sensor that responds to the distance to the teeth could serve a similar purpose.
  • the output signal of the sensor (or the sensor arrangement) 54 is supplied to the card controller 34A.
  • This control differs from the control 34 (FIG. 2) only in the control program, which is tailored to the application in combination with the quality sensor or tooth condition sensor.
  • time is again drawn on the horizontal axis, but this time the number of nits as an example of a quality parameter on the vertical axis.
  • the number of nits Ao (Fig. 6) represents a lower limit that can be achieved with a new set in optimal condition. After the new start of material processing (currently to) with this new set, the number of nits increases as the set condition deteriorates due to wear of the teeth.
  • the number of nits Ag represents a limit for the user (for the spinning mill), which must not be exceeded without intervention.
  • the current number of nits (the actual value) is reported by the sensor (or the sensor arrangement) 54 to the controller 34A. As long as the actual value is below the limit value Ag, the grindstone 16 (FIG. 1) of the system 26 remains in the waiting position (standby phase). At time t1, however, the sensor 54 reports that the limit value Ag has been reached and the controller accordingly triggers an operating phase of the system 26 (control command to the local controller 36).
  • the tooth condition remains impaired, so that the product quality (number of nits) can no longer be reduced to the optimal lower limit value Ao.
  • the number of nits can be improved at best by grinding to the value Am, and this with a steadily increasing tendency of this lower limit value.
  • the standby intervals (carding without grinding) are shortened accordingly.
  • the lower limit for the number of nits approaches a value An, where it is no longer worth grinding repeatedly.
  • the controller 34A then outputs e.g. an alarm via the display 38 (FIG. 2), so that the reeling of the drum can be carried out on a suitable occasion.
  • an alarm can be triggered in order to cause a check by the operating personnel.
  • the invention is not restricted to use on the drum set. She's not up either restricted an arrangement according to which the grindstone is moved from side to side of the working width.
  • Fig. 3 of the aforementioned EP 322637 shows an arrangement according to which the abrasive extends over the entire working width. The arrangement is particularly advantageous for grinding cover sets (flexible sets).
  • Such a system can also be controlled according to the present invention in that the abrasive has a radial distance from the clothing in the ready position. A moving means can then be provided to move the abrasive in the radial direction from the ready position to the operating position (in contact with the clothing).
  • grindstone in this context means a grinding element which is suitable for grinding a set, regardless of the material from which the element is made (e.g. ceramic or sintered metal).
  • the control of various "speed profiles" across this width can result.
  • the speed of movement of the element is kept constant, although this speed can be changed over time (with increasing operating hours since the last grinding operation) or can be adjustable.
  • the operating speed can also be changed as a function of the distance to or from a waiting point, e.g. so that the speed reaches a maximum value in the middle between two waiting positions.
  • Fig. 7 shows schematically a single tooth 60 and the grindstone 62.
  • the arrow 64 shows the direction of rotation of the reel or tooth 60 during production. Grinding during further production inevitably leads to "grinding against the tooth", i.e. the leading edge of the tooth hits the grindstone first.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP93810221A 1992-04-07 1993-03-26 Rectification controlée d'une garniture de carde Expired - Lifetime EP0565486B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH113692 1992-04-07
CH1136/92 1992-04-07

Publications (3)

Publication Number Publication Date
EP0565486A1 true EP0565486A1 (fr) 1993-10-13
EP0565486B1 EP0565486B1 (fr) 1996-12-18
EP0565486B2 EP0565486B2 (fr) 2011-07-13

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EP93810221A Expired - Lifetime EP0565486B2 (fr) 1992-04-07 1993-03-26 Rectification controlée d'une garniture de carde

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US (1) US5355560A (fr)
EP (1) EP0565486B2 (fr)
JP (1) JPH0610216A (fr)
DE (1) DE59304779D1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5625924A (en) * 1994-07-29 1997-05-06 Maschinenfabrik Rieter Ag Method for producing a card sliver and carding machine therefor
US5930869A (en) * 1996-04-12 1999-08-03 Machinenfabrik Rieter Ag Scanning sensor for adjustment of a textile machine card clothing gap
EP0957188A1 (fr) * 1998-05-14 1999-11-17 Maschinenfabrik Rieter Ag Aiguisage des éléments de travail d'une machine de cardage
US6106381A (en) * 1997-12-13 2000-08-22 Trutzschler Gmbh & Co. Kg Grinding device for sharpening the clothing of a carding cylinder
US6129614A (en) * 1996-04-12 2000-10-10 Maschinenfabrik Rieter Ag Apparatus for grinding clothing of a textile machine
US6431969B1 (en) 1997-10-01 2002-08-13 Maschinenfabrik Rieter Ag Device for Grinding of Card Clothings
WO2007033511A1 (fr) * 2005-09-22 2007-03-29 Maschinenfabrik Rieter Ag Procede destine a un dispositif d'aiguisage

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263344A (en) * 1963-07-31 1966-08-02 Stickle Steam Specialties Co I Drying system for paper-making machinery and the like
DE19514039B4 (de) * 1995-04-13 2006-01-19 Trützschler GmbH & Co KG Vorrichtung an einer Spinnereivorbereitungsmaschine, z. B. Karde, Krempel o. dgl.
DE59804953D1 (de) 1997-02-24 2002-09-05 Rieter Ag Maschf Hochleistungskarde
DE59914337D1 (de) 1998-09-09 2007-06-21 Rieter Ag Maschf Schleifen von Garnituren
DE10258789A1 (de) * 2002-12-16 2004-07-08 Graf + Cie Ag Vorrichtung und Verfahren zum Bearbeiten von Faserverarbeitungsgarnituren
DE102004060663A1 (de) * 2004-12-15 2006-07-06 Trützschler GmbH & Co KG Vorrichtung an einer Spinnereimaschine, insbesondere Karde, Krempel, Reiniger o. dgl., zum Bearbeiten, insbesondere Schleifen und/oder Schärfen einer Faserverarbeitungsgarnitur

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR318473A (fr) * 1902-02-11 1902-10-16 Scrive Machine à aiguiser en pointe d'aiguille, les fils métalliques des rubans de cardes
FR1180404A (fr) * 1957-01-22 1959-06-04 F O R Perfectionnements apportés aux rectifieuses pour cylindres de machines textiles, en particulier pour cardes garnies de bandes sans fin
EP0004186A1 (fr) 1978-03-08 1979-09-19 The English Card Clothing Company Limited. Accessoire d'entretien pour une carde
EP0322637A1 (fr) 1987-12-24 1989-07-05 Maschinenfabrik Rieter Ag Rectification de garnitures de cardage
EP0395576A1 (fr) * 1989-04-28 1990-10-31 Moser, Jean P. Schleifmaschinen Rectifieuse cylindrique à table pivotante
EP0497736A1 (fr) 1991-01-29 1992-08-05 Maschinenfabrik Rieter Ag Procédé pour meuler les garnitures sur un tambour de cardage ou tambour de nettoyage par exemple

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE229595C (fr) †
US2823423A (en) * 1953-11-12 1958-02-18 Suzuki Seiichi Automatic card stripper
US4327525A (en) * 1979-03-09 1982-05-04 The English Card Clothing Company Limited Servicing attachment for a carding machine
FR2607631B1 (fr) * 1986-11-28 1989-02-17 Thomson Cgr Sonde pour appareil a ultrasons munie d'un arrangement concave d'elements piezo-electriques
JPS63150144A (ja) * 1986-12-15 1988-06-22 Kimura Youmou Kk カ−ド機における針布研摩装置
CH669401A5 (fr) † 1988-03-02 1989-03-15 Loepfe Ag Geb
DE3828581A1 (de) † 1988-08-23 1990-03-01 Rieter Ag Maschf Reinigungsvorrichtung fuer die wanderdeckel einer karde
DE3928279C2 (de) † 1989-08-26 1998-05-14 Truetzschler Gmbh & Co Kg Verfahren und Vorrichtung zum Erkennen von störenden Partikeln, insbesondere Trashteilen, Nissen, Schalennissen, Noppen u. dgl., in textilem Fasergut, z. B. Baumwolle, Chemiefasern u. dgl.
US5259092A (en) * 1992-10-13 1993-11-09 John D. Hollingsworth On Wheels, Inc. Method and apparatus for cleaning carding flats

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR318473A (fr) * 1902-02-11 1902-10-16 Scrive Machine à aiguiser en pointe d'aiguille, les fils métalliques des rubans de cardes
FR1180404A (fr) * 1957-01-22 1959-06-04 F O R Perfectionnements apportés aux rectifieuses pour cylindres de machines textiles, en particulier pour cardes garnies de bandes sans fin
EP0004186A1 (fr) 1978-03-08 1979-09-19 The English Card Clothing Company Limited. Accessoire d'entretien pour une carde
EP0322637A1 (fr) 1987-12-24 1989-07-05 Maschinenfabrik Rieter Ag Rectification de garnitures de cardage
EP0395576A1 (fr) * 1989-04-28 1990-10-31 Moser, Jean P. Schleifmaschinen Rectifieuse cylindrique à table pivotante
EP0497736A1 (fr) 1991-01-29 1992-08-05 Maschinenfabrik Rieter Ag Procédé pour meuler les garnitures sur un tambour de cardage ou tambour de nettoyage par exemple

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5625924A (en) * 1994-07-29 1997-05-06 Maschinenfabrik Rieter Ag Method for producing a card sliver and carding machine therefor
US5894636A (en) * 1994-07-29 1999-04-20 Maschinenfabrik Rieter Ag Method for producing a card sliver and carding machine therefor
US5930869A (en) * 1996-04-12 1999-08-03 Machinenfabrik Rieter Ag Scanning sensor for adjustment of a textile machine card clothing gap
US6129614A (en) * 1996-04-12 2000-10-10 Maschinenfabrik Rieter Ag Apparatus for grinding clothing of a textile machine
US6431969B1 (en) 1997-10-01 2002-08-13 Maschinenfabrik Rieter Ag Device for Grinding of Card Clothings
US6106381A (en) * 1997-12-13 2000-08-22 Trutzschler Gmbh & Co. Kg Grinding device for sharpening the clothing of a carding cylinder
EP0957188A1 (fr) * 1998-05-14 1999-11-17 Maschinenfabrik Rieter Ag Aiguisage des éléments de travail d'une machine de cardage
EP1195457A3 (fr) * 1998-05-14 2002-05-22 Maschinenfabrik Rieter Ag Aiguisage des éléments de travail d'une machine de cardage
WO2007033511A1 (fr) * 2005-09-22 2007-03-29 Maschinenfabrik Rieter Ag Procede destine a un dispositif d'aiguisage

Also Published As

Publication number Publication date
EP0565486B1 (fr) 1996-12-18
JPH0610216A (ja) 1994-01-18
US5355560A (en) 1994-10-18
EP0565486B2 (fr) 2011-07-13
DE59304779D1 (de) 1997-01-30

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