EP1112144B1 - Grinding of clothing - Google Patents

Abstract

The invention relates to a device for grinding the flats of a card, comprising elastic, flexible elements which penetrate between the clothing points, scan the lateral surfaces of said points and grind same in the process. Additional grinding elements are provided for so as to machine the end faces of the clothing points. The ground material is evacuated by suction.

Description

The invention relates to grinding (or "sharpening") sets, in particular, but not exclusively, of trimmings of lids one Revolving. The invention is suitable for the installation of a grinding device (Sharpening device) in the card, but is not limited to it, could therefore be in a device that is attached to a card if necessary and by Card to card to be worn. The invention is designed such that Device can be used while the card is running. But this also does not constitute Limitation, the invention could be applied in a device that only works when the card is stopped (not producing).

The invention relates in particular to a sharpening or grinding device for one consisting of clothing elements, in particular clothing teeth or wires Set with a large number of individual flank grinding elements, between which the clothing elements to be ground for grinding the side surfaces of the Penetrate clothing elements. The invention also relates to a sharpening or Grinding device for a made of clothing elements, in particular clothing teeth or wire existing set with a variety of individual bristle-like Abrasive elements. Furthermore, the invention relates to a device for Delivery of a set with set elements arranged on a set carrier to a sharpening or grinding device with a large number of individual Abrasive elements.

The sets are, in particular, but not exclusively, on lids one Card with revolving flats arranged.

State of the art:

An earlier application, EP-A-800 895, describes a sharpening or grinding device according to the preamble of claim 1 and a revolving flat edge according to the preamble of claim 32. Another earlier Application WO99 / 16579 (EP-A-1 019 218, prior art according to Art. 54 (3) EPC) develops the concepts according to EP-A-800 895 further.

According to EP-A-800 895, a grinding device comprises a large number of individual ones Grinding elements that penetrate between the tips of the clothing to be ground, paint over the head areas of the tips and grind them. The Abrasive elements are preferably elastically bendable.

The grinding elements can be arranged so that they operate over the Working width of the card can be distributed. For this purpose they can be used by one elongated straps are worn, e.g. so that each grinding element at one end is attached to the carrier and from its attachment point across the carrier protrudes. The carrier can be operated on the card frame by means of a holder mounted in an approximately predetermined relationship to the revolving cover assembly e.g. such that the lids are ground during the "rewind".

The grinding elements, the carrier and the holder can together be a device form, which is built into the card, e.g. such that the device with the card is put into operation itself. For this, the card can be a drive or a Control for the grinder include. But the device can be designed so that it can be attached to the card, e.g. one own drive or control.

According to a first aspect of the invention according to WO99 / 16579, a grinding device for Card cover further characterized in that it has a means of removal of released grinding particles (preferably with a suction device).

According to a second aspect of the invention according to WO99 / 16579, a grinding device according to EP-A-800 895 is further characterized in that it is arranged opposite a clothing carrier (for example a revolving cover assembly) in such a way that the grinding elements have a substantially predetermined immersion depth in the clothing results.
According to a third aspect of the invention according to WO99 / 16579, a grinding device for a clothing is provided which comprises elastically bendable elements, which elements paint over the end faces of clothing elements and can thereby grind or sharpen them. This aspect was specially designed in WO99 / 16579 for sharpening saw tooth sets.

A disadvantage of the prior art is that the way of delivery of the Grinder to the sets must be determined. If the The delivery path is closed with every new grinding process check and adjust if necessary. This is a complex process which can also be faulty.

The present invention:

The terms grinder and sharpening device are in the description below equivalent.

The present invention is for grinding or sharpening clothing elements designed in the form of ticks, as usually found in the set of Revolving lids of a revolving flat card are to be found.

According to a first aspect of the invention (claim 1) in a generic sharpening or grinding device face grinding elements are provided in addition to the side grinding elements. This are designed for machining the end faces of the clothing elements. Through this Arrangement of further grinding elements according to the invention has the effect that not only, as before, the flanks of the clothing elements are repaired, but that in addition the end faces, i.e. the edges of the top or the tips of the Clothing elements can be reworked to the exact shape. With this precise shape Reworking essentially creates new set elements, which are ideally suited, for example when used in a card, the Carding the fibers optimally. Rounded edges or blunt Tips of the clothing elements become effective by the present invention avoided. The invention allows straight edges and sharp tips be created. This ensures the best carding results, even with used ones Trim elements achieved. Furthermore, according to the first aspect of the invention, the side grinding elements and the face grinding elements are on arranged a carrier. This makes a particularly simple construction Embodiment of the present invention created.

According to a second aspect of the invention is a revolving card with a sharpening and grinding device with the characteristics of Claim 32 provided. This solution includes in combination with a sharpening device in addition to the preferred one Solution with a carrier also the possibility of the flank and Form face grinding elements as two different brushes.

The flank and the Face grinding elements can extend over the length of the set, for example is arranged on a flat bar, be evenly distributed. Zones with Flank grinding elements and other zones can be occupied with face grinding elements. The Flank and face grinding elements can also be in substantially at the same time the same zones. The best arrangement results from the Shape of the clothing elements and the shape of the carrier, as well as the simplest Possibility of equipping the carrier with the appropriate grinding elements.

A particularly advantageous embodiment of the invention is that the carrier is a rotatable roller. This ensures a high cutting speed Grinding the clothing elements at a corresponding speed of the roller allows. The constructive and structural design of such a sharpening or Grinding device is relatively simple and economical.

If the face grinding elements have a lower height, starting from the carrier, than the flank grinding elements, the side as well as in one operation to sharpen or grind the forehead of the clothing elements. The carrier only has to have a defined distance from the set to both the sides and the To be able to grind the forehead to the desired size.

The present invention is most frequently used for a clothing in one Revolving flats of a card are used. The revolving cover will be guided past the stationary grinding device, whereby the Set elements are ground. To ensure a reliable and exact cut , it may be advantageous if the revolving cover on the Grinding device is guided past until the grinding process is finished. In the preferred arrangement, however, each flat bar is only once per grinding cycle sharpened. The invention is of course also for sharpening or grinding stationary lids or can be used with other sets.

Bristles have proven to be particularly advantageous for use as flanks and / or as Face grinding elements proven. The bristles are flexible and adapt to each Optimal shape of the clothing elements. By a corresponding surface of the Bristles are used to grind the clothing elements. By different The flank or the forehead of the clothing elements is the length of the bristles ground. The surface mentioned can be characterized by a composition Plastic and abrasives are formed.

The flank and / or the face grinding elements form a brush on the set lies without the abrasive elements mentioned substantially between the clothing tips penetrate, it is possible to grind only the clothing tips accordingly and the Do not weaken the base of the clothing elements.

In an alternative embodiment, the face grinding elements are in particular Grindstones. This results in a very precise grinding of the clothing elements allows for their height. Likewise, very precise designs of the To achieve clothing tips by grinding stones. Depending on the application, these can have special advantages when processing fibers.

The face grinding elements can have a coarser grain than that Flank grinding elements. This creates a different grinding effect on the Set elements as well as a different service life of the elements guaranteed. By designing the grinding elements accordingly Their grain size is to cause the service life of both types of grinding element despite different load is approximately the same, so that the delivery of the set for the grinding device, the flank grinding elements and the Forehead grinding elements.

The device further includes a means for removing by grinding released abrasion, so contamination of the device is reliable too avoid. Removing the abrasion also ensures trouble-free operation guaranteed and also the contamination of the fiber material reliably prevented. The means for removing the abrasion is advantageously one pneumatic suction, which extends over the working width of the set and is arranged opposite a grinding point in such a way that it flows through an air can create the grinding point or past the grinding point. It becomes one complete suction of the grinding point and the clothing or the clothing carrier causes so that even if the clothing intervenes in the fiber material in no longer grinds and adheres to contaminants or Flaws in the fiber material can result.

The device according to the invention is advantageously arranged on means to the Attach the device to the card frame and there the corresponding To grind or sharpen the cover sets. This ensures that Device has a predetermined distance from the lid set, so that a precise grinding is made possible.

The device according to the invention has a controller which controls the device intermittently, the grinding process is at predetermined times use. Depending on the fiber material, soiling and wear, the Set elements a more or less frequent grinding of the set elements occur. There will be a compromise on what is permissible Wear of the clothing elements and the work result of the clothing elements. ever the more the clothing elements are worn, the worse the work result to be expected. It is therefore used to achieve the best possible work results more frequent sanding may be necessary, whereas if possible one economical use a less frequent grinding will be performed.

The device according to the invention can be used stationary on the machine as well as a portable maintenance device for sets of various Machines are used. The maintenance device is in transient operation only arranged for grinding on a machine and after the grinding process removed again. It is thereby at the times when on a single machine not ground, can be used on other machines.

In a preferred configuration according to claim 22, in combination with a sharpening or grinding device of the type described above Device for delivering one arranged on a clothing carrier Set with set elements provided for the sharpening or grinding device. It is designed such that a means is provided which brings a force between the clothing and grinding device so that the clothing and the grinding device are pressed together and one predetermined immersion depth of the clothing elements in the grinding device. It can thereby evenly press the clothing onto the grinding device be guaranteed. This creates a state of equilibrium between the Set and the grinding device, which depending on the selected force predetermined immersion depth of the clothing elements causes. So there is a Press the clothing onto the grinding elements, which enables the grinding to be carried out in a targeted manner Clothing elements is made possible. With the present facility becomes a particularly precise and dimensionally accurate grinding of the clothing elements allows. The sharpening described above or grinding device is both with and without Delivery device can be used. By combining the two facilities however achieved a particularly advantageous embodiment of the invention.

It has been found that the force to be applied to the clothing depends on the Resistance of the grinding elements of the grinding device depends. The bigger the The resistance of the grinding elements is, the greater the force with which the Set must be pressed against the grinder if the same Delivery route should be achieved. To different infeed of the clothing elements to cause or in the grinding elements, it is advantageous if the force with which the set is pressed in the direction of the grinding device is adjustable. As a result, the depth of penetration of the clothing into the grinding elements can be changed and the Removal during grinding adjustable.

The force is advantageously such in the case of different grinding elements set that the clothing elements with the shorter grinding elements just barely to contact. This ensures that essentially all grinding elements in the Intervention with the clothing elements are and therefore an optimal success when grinding can be achieved.

As particularly advantageous for the success of grinding, as well as for an economical one Construction of the device has been found that the force on support surfaces for the clothing carrier, which is arranged on the support surfaces during the grinding process is acting on the clothing carrier and the clothing device. This will make surfaces created, which interact with counter surfaces on the clothing carrier and thus an exact positioning of the clothing carrier or clothing elements to the Ensure grinding device. The force can be defined on the clothing carrier recoverable.

The force can be applied to the set via springs or fluid cylinders. It can be coil springs, leaf springs or rubber springs. As Fluid cylinders can be used in particular pneumatic or hydraulic cylinders. The power can be generated by the weight of the device, if necessary in combination with a counterweight.

The support surfaces are advantageously in the direction of the grinding device moveable. As a result, the support surfaces together with the set brought into contact with the grinding device if necessary. By moving Training is a dodging of the set in relation to the grinding device at too great force possible, so that the clothing and the grinding device always in Are balance of forces. In contrast to the prior art, in which only a path delivery takes place here is a leveling and even action of the Grinding device on the clothing elements of the case.

If the clothing elements are not ground, it is advantageous that the Support surfaces can be brought out of engagement with the clothing carrier. So that will especially with a revolving cover assembly, the revolving cover on the Grinding device passed without it from the support surfaces in the direction of the Grinding device is pressed. By bringing it out and engaging it Support surfaces with the clothing carrier is therefore also the intermittent delivery of the Fitting for the grinding device can be implemented particularly advantageously.

In particular in the case of moving sets, i.e. for revolving lid aggregates To facilitate accretion of the clothing carrier on the support surfaces, it is advantageous if ramps are provided on the supporting surfaces. The clothing carriers are thereby gradually to the desired distance and force with the Brought grinding device.

It is advantageous if the grinding or sharpening device can be transported as a maintenance device can be used for sets of different machines. In particular through the relatively short-term use of the device, it is economically one To provide device for several machines.

The present invention can be applied to the first to third aspects of the invention WO99 / 16579 can be combined individually or collectively, the problem of Delivery of a set to the grinder actually by the present invention insofar as the delivery is preferably carried out with a predetermined contact pressure takes place or by delivering the device to the Set is replaced.

Fig. 1

eine Kopie der Figur 1 aus EP-A-787 841,

Fig. 2

eine erste Ausführung des Standes der Technik nach EP-A-800 895,

Fig. 3

eine schematische Darstellung eines einzelnen Drahtstückes, von vorne betrachtet, um die Schleifwirkung nach EP-A-800 895 zu veranschaulichen,

Fig. 4

eine schematische Darstellung des gleichen Drahtstückes von der Seite betrachtet,

Fig. 5

eine schematische Darstellung einer Variante der Ausführung nach Fig. 2, wobei Fig. 5A ein Detail dieser Ausführung zeigt,

Fig. 6

eine schematische Darstellung einer möglichen Anordnung der Schleifborsten an ihrem Träger,

Fig. 7

eine schematische Seitenansicht im Querschnitt eines bevorzugten Gerätes nach WO99/16579

Fig. 8

ein Detail aus Fig. 7,

Fig. 9

ein Schema einer Deckelzustellvorrichtung des Gerätes nach Fig. 8,

Fig. 10A bis 10D

vier schematische Darstellungen von Endpartien der Garniturhäkchen,

Fig. 11

eine schematische Darstellung eines Arbeitsprinzipes zur Lösung eines aus den Figuren 10A bis 10D ersichtlichen Problems,

Fig. 12 und Fig. 13

eine Ausführung der vorliegenden Erfindung, die als eine Modifikation des Gerätes nach Fig. 2 gebildet ist,

Fig. 14

und Fig. 15 je eine Modifikation der Anordnung nach Fig. 13,

Fig. 16

eine erste Möglichkeit zum Erzeugen des erforderlichen Anpressdruckes,

Fig. 17

eine zweite Möglichkeit zum gleichen Zweck,

Fig. 18

das Eingreifen von Seiten- und Stirnschleifelementen in eine Garnitur,

Fig. 19

einen Besatz einer Halbschale,

Fig. 20

die Anordnung der erfindungsgemäßen Einrichtung an einer Karde,

Fig. 21

eine skizzierte Zustellvorrichtung

Fig. 22

einen Funktionsablauf der Zustellvorrichtung.

Fig. 23

eine schematische Zusammenstellung der einzelnen Elemente eines Schleifgerätes mit einem Endteil eines Deckels,

Fig. 24

eine Ansicht zu einem grösserem Massstab eines Gleitklotzträgers zur Verwendung in einer Anordnung nach Fig. 23.

Embodiments are explained in more detail below as examples with reference to the figures. It shows:

Fig. 1

1 a copy of FIG. 1 from EP-A-787 841,

Fig. 2

a first embodiment of the prior art according to EP-A-800 895,

Fig. 3

1 shows a schematic representation of a single piece of wire, viewed from the front, to illustrate the grinding effect according to EP-A-800 895,

Fig. 4

a schematic representation of the same piece of wire viewed from the side,

Fig. 5

3 shows a schematic representation of a variant of the embodiment according to FIG. 2, FIG. 5A showing a detail of this embodiment,

Fig. 6

1 shows a schematic representation of a possible arrangement of the grinding bristles on their carrier,

Fig. 7

is a schematic side view in cross section of a preferred device according to WO99 / 16579

Fig. 8

7 shows a detail from FIG. 7,

Fig. 9

8 shows a diagram of a cover delivery device of the device according to FIG. 8,

10A to 10D

four schematic representations of end parts of the set hooks,

Fig. 11

2 shows a schematic representation of a working principle for solving a problem which can be seen from FIGS. 10A to 10D,

12 and 13

an embodiment of the present invention, which is formed as a modification of the device of FIG. 2,

Fig. 14

and FIG. 15 each a modification of the arrangement according to FIG. 13,

Fig. 16

a first possibility for generating the required contact pressure,

Fig. 17

a second possibility for the same purpose,

Fig. 18

the engagement of side and face grinding elements in a set,

Fig. 19

a half-shell trim,

Fig. 20

the arrangement of the device according to the invention on a card,

Fig. 21

a sketched delivery device

Fig. 22

a functional flow of the delivery device.

Fig. 23

1 shows a schematic compilation of the individual elements of a grinding device with an end part of a cover,

Fig. 24

23 is a view to a larger scale of a slide block carrier for use in an arrangement according to FIG. 23.

1 shows a revolving flat card 1 known per se, for example card C50 the applicant, shown schematically. The fiber material is in the form of dissolved and cleaned flakes fed into the chute 2, from one Briseur or Vorreisseer 3 adopted as a wadding, a drum or Pass drum 4 and disassembled from a traveling cover set and cleaned. Fibers from the nonwoven fabric on the drum 4 are then separated from one Customer 7 removed and in an existing of different rollers Outfeed section 8 formed into a card sliver 9. This card sliver 9 is then from a tape storage 10 placed in a transport can 11. The card is with one Provide "main exhaust", with which waste can be removed. Such Suction is not specifically shown in Fig. 1, but is well known to those skilled in the art. An example of such a suction can be found in EP-A-340 458. The Traveling cover set includes traveling cover rods, which are not shown individually in Fig. 1, however are indicated in Fig. 2 with the reference numeral 13. Each rod 13 is with one Garnish 14 provided.

The covers 13 are attached to a chain or a belt 5 (e.g. according to EP-A-753 610) and they are thereby a closed "lid path" (via Deflection rollers 6) in the opposite direction or in the same direction as the direction of rotation of the drum 4 moved, on a "lead" (from an entry point E to an exit point A) the carding work and on the "return" the lid on one Cleaning point 60 can be cleaned. The cleaning device is in EP-A-800 894 have been explained in more detail. Then e.g. the cover 13 at position 62 be ground according to EP-A-800 895.

Fig. 2 shows an embodiment according to EP-A-800 895, in which embodiment the Grinding point "coincides" with the cleaning point. This version includes one "Brush" with a sleeve 59 (Fig. 2), grinding elements 42 and cleaning bristles 50, the are carried by the sleeve and away from the sleeve 59 in the radial direction extend. The sleeve 59 is preferably formed from two "half-shells" which in the installed state sat on a drive shaft 57. The brush is part of the Cover cleaning device 60 is provided. 2 also shows a flat bar 13 (including set 14). The direction of movement of the flat bar 13 and the Direction of rotation of the sleeve 59 are indicated by arrows.

As usual when garnishing card covers, the clothing 14 is as flexible or as semi-rigid set executed, the individual set elements 40 made of wire (Flat wire or round wire), each formed with a so-called knee 41. The Bristles 50 penetrate to the bottom of the clothing 14, i.e. down to the surface of the rod 13, from which the wires 40 protrude in order to close the set thoroughly clean. However, only half of the circumference of the sleeve 59 is covered with bristles 50, the other half carries the abovementioned grinding elements 42.

In this embodiment, the grinding elements 42 are similar to the bristles 50, at least in that that they are formed as elongated, elastically bendable elements that are approximately radial protrude from the outer surface of the sleeve 59. The grinding elements 42 are also more flexible than the wires 40, so that in the event of contact with such an element a piece of wire with a relative movement of the element and the wire that Grinding element 42 must give way. The elements 42 are, however, significantly shorter than that Bristles 50, so that they only the "head parts" of the clothing wires 40 (above the reach the respective knee 41). The speed of the free end range each Element 42 is still greater than the speed of the clothing wires 40 in the Direction of movement 15. When the grinding elements 42 on the clothing elements 40 are moved past, they penetrate into the set, taking their free End regions on both sides of the head portions of the wires are deflected (Fig. 3).

The head section of each wire element is provided with a side grinding, i.e. the Side surfaces 43 (FIGS. 3 and 4) converge outward in the radial direction to form an end edge 44. Each time the grinding elements 42 pass the Surfaces 43 are polished or ground side surfaces 43. The Aggressiveness of the polishing or grinding effect depends on the design of the Grinding elements and the speed of the relative movement. The optimal one Effect for a given wire type can be determined empirically.

• Die Reinigungswirkung nimmt ab, weil die Hälfte der Reinigungsborsten 50 "fehlen" (weil sie durch Schleifelemente ersetzt wurden),
• es ist nicht möglich, durch die Einstellung der Drehzahl der Welle 57 (Fig. 2) sowohl die Reinigungs- wie auch die Schleifwirkung zu optimieren,
• es ist nicht möglich, das Schleifen allein "abzustellen", z.B: um ein periodisches Schleifen (nach einem gesteuerten "Stop/Go" Verfahren) zu ermöglichen. Ein solches Verfahren ist z.B. in EP-A-565 486 beschrieben worden.

The solution according to FIG. 2 has certain advantages when retrofitting existing cards that are equipped with a cleaning brush (only provided with bristles 50). The "infrastructure" (ie the carrier, in the form of a sleeve 59, its holder, in the form of the shaft 57 and its mounting and the associated drive) already exists. However, the lid cleaning is constantly in use (as long as the card is running), the lid wires are "constantly" ground accordingly and certain disadvantages have to be accepted:

• The cleaning effect decreases because half of the cleaning bristles 50 are "missing" (because they have been replaced by grinding elements),
• it is not possible to optimize both the cleaning and the grinding action by adjusting the speed of the shaft 57 (FIG. 2),
• it is not possible to "switch off" the grinding alone, for example: to enable periodic grinding (according to a controlled "stop / go" procedure). Such a method has been described, for example, in EP-A-565 486.

It has therefore proven to be advantageous to have your own infrastructure for grinding to provide the card, in particular its own holder for the carrier (which the Grinding elements 42 are attached) and its own controllable drive. Thereby can be a relative speed of the abrasive elements against the wires of more than 15 m / sec (e.g. of 20 m / sec) can be achieved. Such a relative Speed is not optimal for a cleaning brush. The grinding point is thereby separated from the cleaning point and is preferably after Cleaning point viewed in the direction of movement 15 (Fig. 2).

The variant according to FIG. 5 comprises a helical arrangement of grinding elements 42 along a cylindrical support. Each element is a bristle 45 (see especially the detail - Fig. 5A) formed. The bristles 45 are shorter than the bristles 50 of the embodiment according to FIG. 2 and at least the free end region of each bristle 45 provided with an abrasive to form an abrasive area. The entire bristle can e.g. be interspersed with abrasive. The abrasive is there e.g. of hard particles 46 (abrasive grains, diamond grains or the like), which by Adhesive or a binder attached to the bristle 45 or in a matrix are embedded. The helical row of elements 42 extends across the entire length of the beam and therefore over the entire working width. 5 Invisible side of the sleeve 59 can be a second row of grinding elements to be arranged in mirror image to the first row.

The previous description assumed that the grinding device in the card should be installed. However, the invention according to EP-A-800 895 is not based on this limited. The card could e.g. only have attachment points where one Bracket of the grinding device can be attached. The device itself could then be carried from card to card and only if necessary on a specific card Card installed and put into operation. Such a device could have their own drive to rotate the carrier, which is the grinding elements carries, or could just have a coupling to a temporary To enable connection with the drive of the machine.

The preferred solution according to EP-A-800 895 comprised a grinding device with its own "infrastructure" (carrier, drive, etc.) and with grinding elements according to FIG. 5, the carrier 59 preferably being "fully equipped" (instead of merely with individual helical rows of Grinding elements) was, that is, should be occupied with grinding elements practically over the entire circumference.
For certain applications, it has proven to be undesirable to implement the brush as a "fully equipped" carrier. Commercially available grinding elements are available that appear too aggressive in a fully equipped version. An alternative arrangement is therefore shown in FIG. 6 and consists of a zigzag-shaped row of bristle groups along each half-shell. The individual bristles are shown in Fig. 5A - each consists of a filament-like nylon substrate, interspersed with silicon carbide. With the gradual abrasion of the bristle, new abrasive particles are exposed. The number of "bristle lines" L results in the number of clothing tips that are ground simultaneously. This can be selected depending on the output power of the drive.

• eine Absaugung, um abgeschliffene Partikel zu entfernen und
• eine Deckelzustellungsvorrichtung, welche die Decketstäbe einer nach dem anderen zum Schleifen der jeweiligen Garnitur durch Anheben aus dem Deckelpfad in eine Schleifstelle der Bürste zustellen kann.

7 shows two further modifications of the arrangement according to EP-A-800 895, namely:

• suction to remove sanded particles and
• a cover infeed device which can feed the cover rods one by one to grind the respective clothing by lifting it out of the cover path into a grinding point of the brush.

• ein Gehäuse 20, das zur Montage am Kardengestell an einer vorbestimmten Position ausserhalb des Deckelpfades und (stromabwärts von) in Deckellaufrichtung nach der Reinigungsstelle 60 (Fig. 1) vorgesehen ist,
• die Bürste mit dem Träger 59 (vorzugsweise aus Halbschalen gebildet), Schleifborsten 42 und einer entsprechenden Lagerung bzw. Halterung (nicht gezeigt) im Gehäuse 20.
• ein steuerbarer Bürstenantrieb 22 (Fig. 9), der am Gehäuse 20 befestigt und mittels einer Kupplung 21 mit der Welle 57 verbunden ist,
• ein Luftabsaugkanal 23, der sich über die Arbeitsbreite der Garnitur 14 erstreckt und an einem Ende mittels einer Koppelung 24 mit der Hauptabsaugung 25 der Karde verbunden werden kann,
• eine pneumatisch betätigbare Hubvorrichtung 26 (Fig. 9), welche auf der Innenseite des Deckelpfades angeordnet und dem Gehäuse 20 des Schteifgerätes gegenüber steht.

The sharpening or grinding device according to FIG. 7 therefore comprises the following elements:

• a housing 20 which is provided for mounting on the card frame at a predetermined position outside the cover path and (downstream from) in the cover running direction after the cleaning point 60 (FIG. 1),
• the brush with the carrier 59 (preferably formed from half-shells), grinding bristles 42 and a corresponding mounting or holder (not shown) in the housing 20.
• a controllable brush drive 22 (FIG. 9) which is fastened to the housing 20 and connected to the shaft 57 by means of a coupling 21,
• an air suction duct 23, which extends over the working width of the clothing 14 and can be connected at one end by means of a coupling 24 to the main suction 25 of the card,
• a pneumatically actuated lifting device 26 (FIG. 9), which is arranged on the inside of the lid path and faces the housing 20 of the grinding device.

The lifting device 26 comprises two lifting elements 28, which are each arranged in the vicinity of a card side plate (not shown). These elements can be moved vertically up and down between a lower standby or rest position and a working position by means of a pneumatic cylinder 29 and lever 30. Each lever element 28 is provided with a ramp 31 and a horizontal support surface 32.
The card itself comprises a compressed air supply 27 for the lifting device 26 and a controller (not shown) for the brush drive 22.

The grinding device according to FIGS. 7 to 9 now works as follows:

After the card has been put into operation with a new set of lids, it works the grinder is not, i.e. neither the brush nor the lifting device are of the Card supplied with energy. Accordingly, the covers 13 migrate to their "normal" Path "along, without being in contact with the lifting elements 28 of the lifting device 26 occur because these elements are currently in their lower (standby) positions. The The position of the housing 20 is chosen in relation to the normal cover path, that there is no contact between the grinding bristles 42 and the clothing tips takes place. By means of a flap (not shown), the air suction channel 23 is closed off from the Main suction 25 of the card is separated so that no air flow in the Suction channel 23 is generated by the housing 20.

At a suitable time (which will be explained in more detail below) Grinding device (including lifting device and suction) started up. For this, the Brush in the direction of the arrow (Fig. 7) rotated, the air extraction duct 23 with the Main suction 25 of the card connected and the pneumatic cylinder 29 operated, so that the lifting elements 28 are raised into their working positions. How is shown schematically in Fig. 7, the lid 13 can no longer on the Lifting elements 28 come by without touching the ramps 31. Than the lid 13 are pulled forward by the chains or straps 5, they must be moved one by one first the ramps 31 run up, then over the support surface 32 Move parallel to the normal path and then on the normal path to return. When the lifting elements 28 are in their raised (working) positions stand, the support surface 32 defines a "grinding point", in which the wire tips of the Set 14 lie within the cylindrical outer surface of the grinding bristles 42. The Stroke of the lifting movement is selected such that the grinding bristles 42 (during a Cover 13 of the brush is delivered by the lifting device 26) to one predetermined "immersion depth" ET (Fig. 8) penetrates into the set and the Clothing tips (according to the previous invention) grinds. For a semi-rigid or flexible It has proven advisable to have a maximum immersion depth ET of approx. 2 mm (measured from the clothing tip, see. Fig. 8), this parameter in Depending on the clothing type can be optimized and especially for a All-steel furniture can be chosen differently.

The lifting device 26 remains in this working state until each cover 13 "x times" has been ground, "x" being any rational number, preferably in the range 1 to 5. The lifting elements 28 are then lowered again. A suitable one Control is explained in more detail below. The grinding of all lids will be 13 "x times" hereinafter referred to as "grinding cycle".

The lifting elements 28 can the cover 13 against one at each end of the cover 13 Press stop surface 70 of a stop element 71. The stop surface 70 is in a predetermined distance from the grinding elements 42 The depth of penetration of the grinding elements 42 into the clothing 14 becomes the abutment surface established. As the height of the clothing decreases with each grinding process, the depth of penetration for However, an optimal grinding requires a certain depth, it is advisable to use the To make stop surface 70 adjustable in relation to the grinding elements 42. at a set 14, which has been ground several times, is thus the distance from the Stop surface 70 to the grinding elements 42 less than with new sets 14. The lifting elements 28 press the cover 13 only so firmly against the stop surface 70 that there is a clamping effect that is so small that further movement of the Cover 13 can take place over the lifting elements 28.

Grinding can be carried out without removing the card. It is for that but it is advantageous that the grinder works on cleaned lids 13, i.e. the The grinder is installed after the lid cleaning. But it also turned out to be proven advantageous, the particles released by the grinding from the Remove the lid area, otherwise they will stick to the running surfaces of the lid 13 ( the "sliding arch" of the card, not shown). The removal of the Waste material is brought about by an air flow L which is caused by a Vacuum is generated in the air suction duct 23 and preferably from one side to the flows through the other of the lid grinding point. For this purpose, the housing 20 with a suitable air supply opening 33. Extends from the air suction duct 23 a screen wall 34 practically to the lid grinding point or as close as possible without touching the brush bristles with the free-standing brush To risk edge 35 of screen wall 34.

After the clothing tips have been ground, the device becomes again turned off that the energy supply to the lifting device 26 and the brush drive 22nd prevented and the suction channel 23 through the flap (not shown) from the main suction 25 is separated again. Accordingly, the covers 13 only move along the normal lid path and they no longer become the grinding brush delivered. After an operating interval without grinding the cover, this can Grinder can be put back into operation to ensure the quality of the carding work in the Main carding zone to be kept at a desired level.

After a few grinding cycles have been worked through, the grinding bristles 42 may be shortened from their original lengths due to wear. Although the Bristles 42 themselves are still operational, the minimum immersion depth required ET (with unchanged cover infeed) can no longer be reached. This problem could in principle be solved in that the housing 20 compared to the Card frame is adjustable. In an alternative, the delivery movement is changed to to compensate for the shortening of the bristles 42. This can be accomplished that a stop (not shown) is provided to the (raised) To determine the positions of the lifting elements 28 when the cover 13 is being moved, wherein the position of the stop of the brush is changeable. The pneumatic Lifting device 26 must be designed such that it the lifting elements 28 to can have to a predetermined "limit position" of the stop. If those Position is reached, the shortening of the grinding bristles 42 has progressed to such an extent that that they should be replaced rather than reused.

The previous description of the present invention again assumes that the device is installed in the card, but this is not essential to the invention. The grinder could be designed as a maintenance device, which during the Grinding attached to a particular card but then to another card is carried on. Such a device should also be equipped with an extraction system are, however, not necessarily coupled to the main suction of the card can be because card types are very different and the device as possible should be "universal". A "portable" device could have its own Vacuum source are connected, whereby the grinding dust is removed.

A portable device could include a lid delivery device. However, this is not absolutely necessary for such a device. First, it is the common one Card manufacturers' practice of providing and even removing lids built in to grind the lid using a conventional sanding roller enable and secondly it is more possible when attaching a portable device determine the immersion depth by adjusting the device holder, i.e. without to have to put the lids on the brush at all. It will also be clear that a portable device is more suitable for manual operation, although time controls or lid counter can be used to control a grinding cycle could.

A portable device could be designed for use with the card still running will, but will normally be used with non-producing card. In the latter case, it is not absolutely necessary to grind the grinder in a particular one Relationship to cover cleaning because the cover is open during a "service" be cleaned regardless of the card cleaning device.

The maximum immersion depth ET of approx. 2 mm can e.g. be reduced to approx. 1 mm, before the infeed movement is changed, preferably an immersion depth of Is not less than 1.5 mm. The change in the delivery movement (i.e. in given example, the change in position of the adjustable stop) preferably also controlled, in principle it can be carried out manually.

The grinding or sharpening process can be carried out without coolant (dry sharpening) be carried out for flexible, semi-rigid and all-steel cover fittings.

The sharpening bristle catches can be 15 to 20 mm when used for the first time. The Grain size of the bristle can be between about 300 and 600, e.g. approx. 500. The flap (not shown), which separates the air suction duct 27 from the main suction are actuated by the cover feed actuator (the lifting device 26).

There can be a suitable shield for the treads (the sliding arch) of the cover be provided to prevent grinding dust from settling thereon. Such Cover plates are not shown here because suitable elements for use with conventional grinding rollers are known and for use in combination with can be transferred to the new device.

The aggressiveness of the grinding elements or the grinding device must at most Machining of an all-steel set can be increased, which is the "fully equipped" carrier brings it back to the foreground. Since the "side grinding" for the all-steel set without Meaning is, the items can be changed so that they are mostly based on the (radially outward) end faces of the clothing teeth act. To the elasticity or the design (e.g. the width) of the grinding elements be changed so that they have less of a tendency between the Penetrating elements, but more the ability to get into the Bend the direction of movement of the clothing elements. Instead of grinding bristles, you could e.g. Select slats that "support" the front of the clothing teeth. On Such grinder could also be used for grinding drum, lickerin, or Buyer sets are used. Accordingly, a grinder can be provided are, which is provided with elastically bendable grinding elements, these Elements paint over the end faces of clothing elements and thereby them can grind or sharpen.

The ticks in FIGS. 10A and 10B are new and each have a free end section 70 on. Each has two side surfaces 72 made by side grinding, which together form a straight edge 73, which "sharp" results in "front" 74.

The ticks of Figures 10C and 10D are worn and worn by a device EP-A-800 895 has been ground. They have end portions 75 that differ from the Clearly differentiate end sections 70. The grinder has new side surfaces 76 created that give an end edge 77. When viewed from the side (FIG. 10C), this edge is 77 not straight, but curved and viewed from the front (Fig. 10D), it is slim, however rounded rather than pointed. A tip 74 is definitely missing (FIG. 10A). It applies to arrive at the shape of the end portions according to FIGS. 11a and 11B as far as possible.

A solution is shown schematically in FIG. 11. A rotatable carrier 80 is included Abrasive bristles 82, the one at the free ends of the hooks 84 Strip flat bar 86. The direction of rotation of the carrier 80 and the direction of movement of the rod 86 are indicated by arrows. When the bristles 82 are now in contact with the ends of the check marks without making any significant in-between, eliminate the curvature of edge 77 (Fig. 10C) and straighten it again Edge forth. A certain contact pressure is required for this, the bristles 82 being such must be chosen so that under this pressure they are not between the checkmarks penetrate, but edit the "front" of the tick.

The grinding bristles 82 are therefore preferably different from those 2 in that they are shorter, stiffer and thicker, for example are or more densely populated, which means more bristles in contact with the Are set. For these or other reasons, they face the elements 42 a lower elasticity. The carrier 80 is preferably so tight with Bristles 82 occupies that the resulting "brush" has some resistance against the penetration of the individual bristles into the set, which is why the End faces can be edited as the side faces of the tick.

A practical solution could therefore include two different grinding brushes, of which one (according to EP-A-800 849) the side grinding and the other (according to the present Invention) created a sharp tip. However, the preferred solution comprises only one only "brush" that is equipped with two different bristle types.

A first embodiment can therefore be derived directly from the variant according to FIG. 2 by using two different half-shells, each with its own bristle type, be used. Such an embodiment is shown in FIG. 12. Because the sanding brush does not have to perform a cleaning function, the bristles 50 (FIG. 2) which are on the Enter the bottom of the flat bar set. One half shell has grinding bristles 42 on the (as in the variant according to Fig. 2) the side surfaces of the tick end portions to edit. The other half-shell has additional grinding bristles 82 which (as in FIG of the variant according to FIG. 11) machine the end faces of the end section. In Fig. 13, four shells 59A, 59B, 59C and 59D are provided which are on a carrier 57 are arranged. The grinding bristles 42 and 82 are therefore alternately on each arranged a quarter circle. This makes it possible to use only the long bristles or just replace the short bristles.

The invention is not restricted to the variants according to FIGS. 12 and 13. Further variants are shown schematically in the figures given below, in these variants, each half-shell with grinding elements for Ensure the side grinding as well as elements for editing the End faces of the check mark includes:

14 shows rows of relatively long side grinding elements 42 and rows of relative short elements 82 for processing the end faces. The elements 42 and 82 are alternately used in each (not shown) half-shell. The carrier roller is 204 indicated.

In Fig. 15 each row of bristles is both with long side grinding elements 42 as well equipped with short face machining elements 82. On the carrier roller (not shown) several of these rows of bristles can be arranged. For better Assembly they are arranged on half-shells 205 and 206, which in regular Distances are screwed onto the drum or roller, not shown.

Figures 16 and 17 each show one way of generating the required Contact pressure when sharpening the clothing. 16 is a Flat rod 90 is fed to the grinding brush by means of a feed plate 92. The brush is only schematically indicated here by the bristles 82, 42, the direction of rotation with is indicated by an arrow. The plate 92 is by means of a spring 96 in the direction of Axis of rotation (not shown) of the brush pushed, the feed movement by the Touching the tick end parts with the relatively stiff bristles 82 is limited. If the difference in length between the shorter and longer bristles is approx. 1 is up to 4 mm (preferably 1.5 to 2.5 mm), the longer bristles 42 accordingly in the set 14 and ensure the side grinding.

The stiffer bristles 82 can be dressed by means of a dressing device prior to installation in the The card is sanded so that the brush is in the working position across the Machine runs parallel to the flat rod geometry.

In the variant according to FIG. 17, the flat bar 98 with its clothing 14 is positioned “firmly”, ie it is not pushed against the sharpening brush 100 indicated schematically. Instead, the sharpening brush 100 is pressed against the flat bar 98, for example by being rotatably mounted on a lever 102, the lever 102 being pivotably mounted on an axis 101. The contact pressure exerted by the brush 100 on the rod 98 is adjustable because a counterweight 104 which can be adjusted in the longitudinal direction of the lever 102 is provided.
The counterweight 104 is used to set the force with which the brush 100 and the clothing are pressed together.

FIG. 18 shows the engagement of the side grinding elements 201 and the face grinding elements 202 with respect to the trim elements 210. It can be seen from this that the Face grinding elements 202 are shorter than the side grinding elements 201. hereby is caused that the longer flank grinding elements 201 essentially only the Contact the side surfaces of the trim elements 210 and grind them. The shorter ones Face grinding elements 202 only extend to the tip or forehead of the clothing elements 210. As a result, they only graze along the end face of the clothing elements 210, see above that only the end face can be machined by the face grinding elements 202.

19 shows an example of an arrangement of grinding elements 201 and 202 shown on a half-shell 205 '. In contrast to the exemplary embodiments 13A and 13B there is a different one on a half-shell 205 Occupation with grinding elements 201 and 202 shown. The half shell 205 'is in individual segments divided. In neighboring segments Flank grinding elements 201 and face grinding elements 202 are arranged. This will with one rotation of each clothing element 210 both of flank grinding elements 201 as well as face grinding elements 202. To balance the axial forces, which act on the roller 204, not shown, is provided that the Flank grinding elements 201 are arranged in opposite directions. Do this by lifting the axial forces caused by the oblique arrangement of the Flank grinding elements 201 can occur again.

The flank grinding elements 201 are on the Half shell 205 'arranged as the face grinding elements 202. This also a relatively strong resistance through the face grinding elements 202 den Set elements 210 opposite, so that the immersion depth essentially is determined by the height of the face grinding elements 202.

The segments, which include face grinding elements 202, can mutually be in the Overlap the circumferential direction of the brush. This prevents "alleys" remain open between these segments, which leaves unpolished clothing (in the Alleys) would result.

Each group of flank grinding elements 201 can consist of two parallel rows such elements exist. The "front" row (viewed in the direction of rotation) each Group is worn out first, with the bristles of this front row going through the Back row bristles are supported. If the bristles of the front row the bristles in the back row come to a shortening due to wear Commitment.

The arrangement of the sharpening and grinding device according to the invention is shown in FIG shown on a card 1 with a revolving flat aggregate. In this The exemplary embodiment is the roller 204 in the running direction of the flat bars 13 in the connection arranged on the lid cleaning device 60. At this point, the available space as well as the usability a very good Arrangement of the grinding device proved. The arrangement corresponds essentially the arrangement of Figure 1, which the grinding point 62 also following the Denoted cleaning point 60. The direction of rotation of the roller 204 (or Grinding brush) is opposite to the direction of rotation of the drum 4.

Figure 21 shows a schematic diagram of a delivery device. There are here the flat bars 13 each with a set 14 shown, which does not connecting elements shown, for example chains or straps together are connected. A lid 13 is fed to a delivery device 220. The In this case, cover 13 is moved onto a sliding block 224 which supports the Flat bar 13 moves in the direction of a roller 204. Roller 204 rotates in Arrow direction with a peripheral speed, which is a sufficient Cutting speed for grinding the clothing 14 allowed. The flat bar 13 will thereby by means of spring force, which results from the springs 223, against grinding elements, which are arranged on the roller 204. The grinding elements are in the 21 only by means of the respective "lateral surfaces" 202A (for the shorter, stiffer ones Elements for grinding the front edges) and 201A (for the longer, more flexible Elements for creating the side grinding). The grinding elements 201 and 202 apply a corresponding force to the flat bar 13, so that a Equilibrium state between the roller 204 and the flat bar 13 sets. Due to this state of equilibrium, a predetermined depth of penetration of the clothing is 14 to effect in the grinding elements 201.

If the grinding device should not press on the clothing 14, the Infeed device 220 is moved away from roller 204 in the double arrow direction. hereby the flat bars 13 slide past the sliding block 224 and do not move in the direction raised on roller 204. It is, so to speak, an on / off device for the grinding device.

Figure 22 shows in the sketches a) to e) different situations in the area of Sanding roller 204.

In a) a clothing carrier 213 with a clothing 200 is outlined. The clothing rack 213 in this case is a flat rod. The set 200 consists of a variety of Set elements 210. These can be ticks or in other exemplary embodiments be teeth too. The clothing carrier 213 slides on a guide 215.

In b) the delivery device 220 is shown when it is in the standstill position, and the Roller 204 with the outer surfaces 201, 202 (similar to FIG. 21). By the distance of the Guide 215 of a grinding roller 204 has the clothing carrier 213 when it is on the Guide 215 slides under roller 204, no contact with roller 204 or the grinding elements 201 and 202. The delivery device 220 consists in this Outlined version of a sliding element 222, which in guides 227 in Direction on the roller 204 can be moved. Are on the sliding element 222 Springs 223 arranged. A sliding block 224 is attached to the springs 223. In the shown position of the delivery device, the springs 223 are biased Position. Characterized in that the sliding element 222 is in the lowest position the sliding block 224 makes no contact with the clothing carrier 213 moved over it.

In illustration c) it is shown how the clothing carrier 213 is on a support surface 226 of the sliding block 224. The clothing carrier 213 is previously over ramps 225 has been moved onto the support surface 226. The position c) shows the compression of the Springs 223 due to the load with the clothing carrier 213. It is here on the Counterforce, which is applied by the roller 204 in use For reasons of illustration have been dispensed with. The sliding element 222 is in the position c) in the extended position. This means that the guides 227 are at maximum here Delivery position.

In contrast to position c), the actual state is at position d) Position of the clothing carrier 213 shown with roller 204 arranged. It's out of here It can be seen that the grinding elements 201 and 202 against the clothing 200 and the Press clothing elements 210. The spring force of the springs 223 thus becomes a force brought from the outside by the grinding elements 201 and 202. The Delivery device is thus in equilibrium, so that on the one hand Force of the springs 223 against the force corresponding to the contact pressure Abrasive elements 201 and 202, in particular counteracts the grinding elements 202. in the the shorter and stiffer face grinding elements 202 bring the essential Resistance to the spring force.

The system has the main advantage that the spring force and Resistance of the grinding elements 201 and 202 a self-adjustment of the device he follows. While the sliding element 222 only from a stop position in the other stop position must be transported, is always by the spring force constant pressing of the clothing elements 210 against the grinding elements 201 and 202 guaranteed. By different preloading of the springs 223 Different forces can also be set here, which means the immersion depth of the clothing elements 210 in the grinding elements 201 and 202 are predetermined can.

In position e), the ground clothing carrier 213 is the after Grinding device again outside the engagement of the roller 204 and outside the Engagement of the delivery device 220 arranged on the guide 215.

24 shows a carrier part 230 of a delivery device with the sliding block 224 and Springs 223, of which a spring is only indicated by a dash-dotted line 223A is. The carrier part 230 has a respective receiving bore 231 for each spring 223, a guide member 232 connected to the sliding block 224 also in the latter Hole 231 is added. If a cover sliding element (partially with 233 indicated) rests on the sliding block 224, the guide members 232 in their respective holes 231 pressed against the spring force. The distance x "between the slide block 224 and the support member 230 may be adjustable to the spring force to be able to choose.

In its standby position, the sliding block 224 is in the vicinity of a guide element 234 which is fixedly mounted in the frame (not shown) of the grinding device and is received in a blind hole 235 in the carrier part 230, this element 234 on the sides? of the hole 235 slides when the support part 230 is moved upward.
The carrier part 230 is pivotally mounted on a stub shaft 236 of an eccentric shaft (not shown). When the eccentric shaft is rotated, this axis 236 can be rotated vertically in the indicated arrow directions, the element 234 thereby prevents the part 230 from rotating. The carrier part 230 can thereby be brought into contact with a stop 237. Such carrier parts must of course be provided on both sides of the drum 4 (Fig. 20). Each actuator (eccentric shaft and support member 230 in this example) is preferably adjustable to ensure that the feed movements of the support members 230 on both sides of the card are substantially the same. (ie the movements from the respective standby to the respective work positions).

Of course, the present invention is not limited to that shown Embodiments limited. So of course another kind of Delivery device possible. Instead of longitudinal guides, as shown in Figure 22 eccentric guides are also possible. Besides, that is Infeed, the roller 204 against stationary support of the clothing carrier 213 possible, in which the roller 204 is elastically supported in a similar manner as in Embodiment of Figure 22, the delivery device. That would be kind Combination of the embodiment according to FIG. 22 with the embodiment according to FIG. 17. The trim In addition to the grinding elements 201 and 202, the grinding device can also Cleaning brushes, as shown in Figure 2, include. It can in this way, in addition to the grinding process, the clothing is also cleaned. Furthermore, all versions shown are with each other and with the previous ones to combine detailed solutions of the prior art.

23 schematically shows a compilation of a grinding device SV with (only) an end part of a cover D, the middle part of the grinding device SV has been cut out. The sleeper device SV comprises a roll 204, one Drive motor 239 and with half-shells (not specifically indicated) that with long ones Bristles 201 and short bristles 202 are provided (see FIGS. 18 to 22). The lid D comprises a flat bar 13 with a set 14. The bar 13 is on a noble connected to a belt 236 by means of an end head 235. Suitable for this Connections are e.g. in GB-B-870 424, DE-Gbm-7345579 and EP-A-627507 shown. The other end of the flat bar 13 is in the same way with connected to a second strap, which is why only one end is shown and described must become. The end head 235 is also provided with a sliding section 237 which normally slides on a so-called return rail 238 while the Lid of the closing device approaches or after the lid of the Has left the sleeping device. After actuating the feed device Fig. 21 the end head 237 of a flat rod is no longer in the grinding point Contact with the return rail assigned to him. Instead, an outer one slides Part 233 (Fig. 24) of the end head associated with this rod end on the sliding block. (or slide plate) 224.

The grinder is mounted between two side walls 240, which on Card frames have been firmly attached. There are adjustment means (not shown) provided to ensure that the axis of the roller 204 to the longitudinal axis of the Flat bar 13 is parallel when the flat bar 13 is on the return rails supports. After operating the grinding or delivery device, the Longitudinal axis of the raised flat bar still parallel to the longitudinal axis of the roller 204 stand. The delivery device in FIG. 23 comprises a carrier part 230 (cf. FIG. 24), which has a guide element 234 and a stub shaft 236 (cf. FIG. 24) an eccentric shaft 237. The shaft 237 itself is rotatable in one the wall-mounted bearing 241 mounted. Are located outside the side walls 240 a rocker arm and a pneumatic cylinder for rotating the eccentric shaft 237. The latter elements have been omitted from FIG. 24 for the sake of clarity. The Card control triggers the actuation of the pneumatic cylinders in order to To operate the delivery device.

Claims (38)

1. Sharpening and/or grinding device (204) for grinding the side surfaces (43) and the front sides of the head portions of clothing elements (210), with a multiplicity of single flank grinding elements (201) between which the clothing elements (210) to be ground penetrate for the grinding of the side surfaces of the clothing elements (210), characterized in that in addition to the flank grinding elements (201), front grinding elements (202) are provided for finishing the front sides of the clothing elements (210), and that the flank grinding elements (201) and the front grinding elements (202) are arranged on a support.
2. Sharpening and/or grinding device (204) according to claim 1, characterized in that the support is a rotatable roller (204).
3. Sharpening and/or grinding device (204) according to one of the preceding claims, characterized in that the support extends across the working width of the clothing and that the grinding elements are distributed across said width.
4. Sharpening and/or grinding device (204) according to one of the preceding claims, characterized in that the grinding elements are arranged along the support in rows, in particular in helix shape.
5. Sharpening and/or grinding device (204) according to one of the preceding claims, characterized in that the support is fully fit with grinding elements.
6. Sharpening and/or grinding device (204) according to one of the preceding claims, characterized in that, seen from the support, the front grinding elements (202) are of a lesser height than the flank grinding elements (201).
7. Sharpening and/or grinding device (204) according to one of the preceding claims, characterized in that the front grinding elements (202) are grinding stones.
8. Sharpening and/or grinding device (204) according to one of the preceding claims, characterized in that the flank grinding elements (201) and/or the front grinding elements (202) are bristles.
9. Sharpening and/or grinding device (204) according to claim 8, characterized in that the bristles consist of plastic and grinding material.
10. Sharpening and/or grinding device (204) according to claim 8 or 9, characterized in that the grinding means consists of hard particles, preferably of grinding grains, diamond grains or silicon carbide.
11. Sharpening and/or grinding device (204) according to claim 8, characterized in that the grinding means intersperses the plastic material, in particular that it is embedded in a matrix structure or that they are fixed onto the grinding elements from outside, in particular by adhesives or binding means.
12. Sharpening and/or grinding device (204) according to claim 11, characterized in that the front grinding elements are provided with grinding means, at least in the free end zone.
13. Sharpening and/or grinding device (204) according to one of the preceding claims, characterized in that the grinding means of the front grinding elements(202) comprise a coarser graining than the one of the flank grinding elements (201).
14. Sharpening and/or grinding device (204) according to claim 8 to 13, characterized in that the bristles are arranged in groups.
15. Sharpening and/or grinding device (204) according to one of the preceding claims, characterized in that front grinding elements (202) form a brush which rests on the clothing (14, 202) without considerable penetration of the mentioned grinding elements (201, 202) between the clothing points.
16. Sharpening and/or grinding device (204) according to one of the preceding claims, characterized in that the device comprises a means (220; 102, 104) to remove the abrasive that has been generated/set free during the grinding.
17. Sharpening and/or grinding device (204) according to claim 16, characterized in that the means (220; 102, 104) comprises a suction device (60).
18. Sharpening and/or grinding device (204) according to claim 16 or 17, characterized in that the suction means (60) extends across the working width of the clothing (14, 200) and that it is arranged in such a way in relation to a grinding point (62) that it can generate an air flow (L) through the grinding point (62) and/or past the grinding point (62).
19. Sharpening and/or grinding device (204) according to one of the preceding claims, characterized in that means (220; 102, 104) are provided in order to fasten the device on the card frame, in order to grind or sharpen flat clothings (14, 200).
20. Sharpening and/or grinding device (204) according to one of the preceding claims, characterized in that the device comprises a control unit which puts the device into operation intermittently.
21. Sharpening and/or grinding device (204) according to one of the preceding claims, characterized in that it is portably applicable as a maintenance device for clothings (14, 200), on different machines.
22. Sharpening and/or grinding device (204) according to one of the claims 1 to 21, with a device for advance adjustment of a clothing (14, 200) with clothing elements (210). being arranged on a clothing support (13), characterized in that a means (220; 102; 104) is provided, which effect to have a force act between the grinding device (204) and the clothing (14, 200), so that the clothing (14, 200) and the grinding device (204) are pressed against each other and that they effect a pre-determined penetration depth of the clothing elements (210) into the grinding device (204).
23. Sharpening and/or grinding device (204) according to claim 22, characterized in that the force to be generated depends on the resisting force of the grinding elements (201, 202) of the grinding device (204).
24. Sharpening and/or grinding device (204) according to claim 22 or 23, characterized in that the force is adjustable.
25. Sharpening and/or grinding device (204) according to one of the claims 23 to 24, characterized in that in case of differently long grinding elements (201, 202) the force is adjusted in such a way that the clothing elements (210) contact the shorter grinding elements (202).
26. Sharpening and/or grinding device (204) according to one of the claims 22 to 25, characterized in that the force is adjusted in such a way that there is a condition of equilibrium between the clothing elements (210) and the grinding elements with regard to the predetermined penetration depth.
27. Sharpening and/or grinding device (204) according to one of the claims 22 to 26, characterized in that force affects the clothing support (213) and the clothing (14, 200) through support surfaces (226) for the clothing support (213) said clothing support being arranged on said support surfaces (226) during the grinding process.
28. Sharpening and/or grinding device (204) according to one of the claims 22 to 27, characterized in that the force is applied onto the clothing (14, 200) through springs (223) or fluid cylinders.
29. Sharpening and/or grinding device (204) according to one of the claims 22 to 28, characterized in that the support surfaces (226) are movably arranged in the direction towards the grinding device (204).
30. Sharpening and/or grinding device (204) according to one of the claims 22 to 29, characterized in that the support surfaces (226) can be disengaged from the clothing support (213).
31. Sharpening and/or grinding device (204) according to one of the claims 22 to 30, characterized in that the support surfaces (226) comprise ramps (225).
32. Revolving flat card with a sharpening and/or grinding device (204) for grinding the side surfaces (43) and the front sides of the head portions of the clothing elements (210) with a plurality of single flank grinding elements (201) between which penetrate the clothing elements (210) to be ground for grinding the side surfaces of the clothing elements (210), characterized in that in addition to the flank grinding elements (201) front grinding elements (202) are provided for the finishing of the front sides of the clothing elements (210).
33. Card according to claim 32, characterized in that the flank grinding elements (201) and the front grinding elements (202) are furnished in the form of two different brushes.
34. Card with revolving flat aggregate, characterized in that said aggregate comprises a grinding device according to claim 1 to 21 or a grinding device with advance adjustment means according to claim 22 to 32.
35. Card according to claim 32, 33 or 34, characterized in that the grinding device is allocated to the revolving flat for the grinding of the flat clothing.
36. Card according to claim 32 to 35, characterized in that the grinding device, in the moving direction of the revolving flat, is followed by a cleaning point.
37. Card according to claim 32 to 36, characterized in that the relative speed of the grinding elements in relation to the flat clothing is higher than 15 m/sec.
38. Card according to claim 32 to 37, characterized in that the revolving flat and the grinding elements are movable in the same direction.

Images