EP0800895B1 - Grinding for clothing - Google Patents

Description

The invention relates to grinding sets, but in particular not exclusively from sets of lids of a revolving card. The invention is suitable for installing a grinding device in the card, but is not on it Restricted, could therefore be used in a device that is on demand attached to a card and carried from card to card. The invention is designed in such a way that the device can be used while the card is running. Also however, this is not a limitation, the invention could be in one device be used, which only works when the card is stopped.

State of the art:

The grinding of the lid set is described in the "Manual of textile production, Die Kurzstapelspinnerei ", Volume 2: Cleaning and Carding (The Textile Institute, Author: W. Klein), page 58/59. The means used for this are in principle very old - see e.g. GB 22 533 from 1895, DE 61636 from 1891 and DE 606 832 from 1933. Another proposal, according to which the revolving cover unit can be removed as a "module" from the machine for maintenance, is in DE 2741089 Trützschler listed. A more modern grinder is also in JP 57-112415 (published on July 13, 1982).

EP-C-322637 has presented a grinding device that is in constant use or is ready for use. This device can be used to grind a lid set a corresponding embodiment is shown in Figure 3 of EP-C-322637 has been explained below with reference to FIG. 2 of this application, which is why there is no further treatment here.

The invention:

The invention provides a method according to claim 1 and a flat card with a grinding device according to claim 2. After that is one Variety of individual grinding elements provided between the tips of the penetrate the clothing to be ground, paint over the head parts of the tips and them can grind in the process. The grinding elements are elastically bendable.

The grinding elements can be arranged such that they operate over the Working width of the card can be distributed. For this purpose they can be used by one elongated carriers are worn, e.g. so that each abrasive element at one end is attached to the carrier and from its attachment point across the carrier protrudes.

The arrangement can be made such that when the grinding elements are used up (no longer usable) by replacing the carrier can be replaced. For this purpose, the carriers can be formed as half-shells e.g. according to the principle that in connection with Figures 4 and 5 of DE Utility model 94 14 196 was declared.

The grinder may comprise a carrier which is movable, e.g. rotatable can be assembled. The carrier can be operated on the card frame by means of a Holder in an approximately predetermined relationship to the revolving cover assembly be installed, e.g. such that the lids are ground during the "rewind" become.

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. The device could be like this be designed so that it can be attached to the card, e.g. one own drive or control.

Embodiments of the invention are described below as examples with reference to the figures of the Drawings explained in more detail.

Fig. 1

eine Kopie der Figur 1 aus EP Patentanmeldung Nr.96 101 466 vom 2.2.1996,

Fig. 2

eine Kopie der Figur 3 aus EP-C-322 637,

Fig. 3 bis 5

Kopien der Figuren 3 bis 5 aus dem vorerwähnten DE Gebrauchsmuster 94 14 196,

Fig. 6

eine erste Ausführung der Erfindung in der Form einer Modifikation der Anordnung nach den Figuren 3 bis 5,

Fig. 7

eine schematische Darstellung eines einzelnen Drahtstückes, von vorne betrachtet, um die Schleifwirkung zu veranschaulichen,

Fig. 8

eine schematische Darstellung des gleichen Drahtstückes von der Seite betrachtet,

Fig. 9

eine schematische isometrische Darstellung einer zweiten Ausführung, wobei die Figur 9A ein Detail aus der Figur 9 darstellt,

Fig.10

eine schematische isometrische Darstellung einer dritten Ausführung, wobei die Figur 10A ein Detail aus der Figur 10 darstellt, und

Fig.11 bis 13

weitere Alternative für Schleifelemente nach dieser Erfindung.

It shows:

Fig. 1

1 a copy of FIG. 1 from EP patent application No. 96 101 466 from February 2, 1996,

Fig. 2

a copy of Figure 3 from EP-C-322 637,

3 to 5

Copies of Figures 3 to 5 from the aforementioned DE utility model 94 14 196,

Fig. 6

1 a first embodiment of the invention in the form of a modification of the arrangement according to FIGS. 3 to 5,

Fig. 7

1 shows a schematic representation of a single piece of wire, viewed from the front, to illustrate the grinding effect,

Fig. 8

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

Fig. 9

2 shows a schematic isometric illustration of a second embodiment, FIG. 9A representing a detail from FIG. 9,

Figure 10

10 shows a schematic isometric illustration of a third embodiment, FIG. 10A representing a detail from FIG. 10, and

Fig. 11 to 13

another alternative for grinding elements according to this invention.

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 dissolved and cleaned by a traveling cover set 5, the a closed path along deflection rollers 6 in opposite or opposite directions is driven to the direction of rotation of the drum 4. Fibers from the drum 4 located nonwoven fabric are then removed by a customer 7 and in a outfeed section 8 consisting of different rolls to form a card sliver 9 educated. This card sliver 9 is then from a sliver 10 in a Transport can 11 stored in a cycloidal manner. The revolving cover set 5 includes Revolving flat bars, which are not shown individually in Fig. 1, but in Fig. 2, or Fig. 3 with the reference numeral 13 are indicated. Each rod 13 has a set 14 Mistake.

The covers 13 in the revolving cover set 5 move in a "lead" from one Entry point E to a discharge point A. During the lead, the carding work done. The lids are on the "return" at a cleaning point 60 cleaned - the cleaning device is explained in more detail below with reference to FIG. 3 explained. Then e.g. at position 62, the cover 13 according to EP-C-322 637 are ground, as will be explained with reference to FIG. 2.

Fig. 2 shows a grinding device 32 which is acted on the revolving flat bars 13. The Grinding device 32 comprises a trough-shaped container with two side walls 33 and one Cover plate 34. The free edges 36 of the walls 33 run parallel to each other on the revolving cover 13 abutting grinder 32 or perpendicular to Direction of movement of the clothing 14. At the free edges 36 is a flexible Band trained carrier 37 attached, which extends along the cover 13 (perpendicular to the drawing level) extends over its entire length. On its the traveling cover 13 facing the carrier 37 has an abrasive coating which e.g. from fine Abrasive particles, in particular diamond powder, can consist. The carrier 37 can for example a metallic thin strip, a fabric or plastic with a Be an abrasion coating that complies with local irregularities, i.e. the geometric shape of the surface defined by the tooth tips of the set, adapts, but is not deformed by the grinding forces. In addition, he may not Form wrinkles.

A hose 38 made of elastic material closed at both ends extends inside the trough-shaped container 33, 34 over its whole Length. Through a valve 39, the hose 38 can be filled with a desired fluid Pressure. In operation, the hose 38 thus exercises at any point on the Carrier 37 the same pressure. The carrier 37 is thereby over its entire Length pressed against the lid 13 and therefore lies with its abrasive coating evenly on the set 14. As a result, it also follows that even in the event of irregularities in the height of the tooth tips of the clothing 14 uniform application of the band 37 over the entire length of the cover 13 is available. This is because it is in an increase or decrease moving zones of the carrier 37 can only perform their movement if At the same time, zones adjacent to these zones perform movements which cause a parallel to the beam 37, i.e. 2 horizontal, movement component have.

The grinder shown is only able to the outer end faces of the Handle wires of the lid set. Although the conventional grinders work similarly, the treatment is not at least for certain clothing types advantageous. In addition, the relative movement between the abrasive and the Set too slow if you rely on the movement of the covers 13.

Fig. 3 shows a cleaning device with a pivotable device 16 which for this invention is irrelevant and is not described in detail here. Additionally includes the cleaning device is provided with bristles 50 and with a predetermined one Speed rotating brush 51, the bristles 50 on the one hand to the bottom of the Grab set 14 of the lid 13 and on the other hand in the swivel area 52 (through a dash-dotted circular line shown schematically) of the pivotable device 16 are sufficient, which, as can be seen from the figures, is equipped with clothing wires.

This engagement of the bristles 50 in the swivel range mentioned this seen in the cleaning movement clockwise, with a view of Fig. 3, the Device 16 cleaned.

The bristles are provided in a row and preferably helical arranged. The brush 51 extends over the entire working width. A flat bar 13, which leaves the device 16, soon comes into contact with the brush 51, which therefore carries out a second cleaning step.

A hood 55 delimits a suction area 54. One opens into this area Suction line 56, which (e.g.) in a system according to EP-A-394 831 or EP-A-583 219 can be integrated. Dust and flight whirled up by the bristles 50 now reach the suction area 54 and are removed via the suction line 56. Of course, the suction effect also carries away material that falls away from the device 16.

A preferred embodiment of the brush 51 is shown schematically in FIGS. 4 and 5 shown and will be described below, it being understood that the Brush 51 (Fig. 3) rotated via a shaft 57 by means of a drive (not shown) becomes. The shaft 57 is supported in bearings (not shown) that are in the side plates 20 are mounted. The shaft 57 can therefore not be easily removed from its carrier become. The brush 51 is, however, a wear part that is occasionally replaced got to.

Basically, the brush consists of a sleeve 59 (Fig. 3) and the aforementioned Bristles 50 carried by the sleeve and extending in the radial direction from stretch the sleeve 59 away. 4, the sleeve 59 is made of two "half-shells" 59A, of which the end parts of a half-shell are shown from the side in FIG. 5 are. Each half-shell has an outer cylindrical outer surface 62 and an inner one cylindrical surface 63, which sits well on the shaft 57 in the installed state. The two half-shells, which together form a sleeve 59, are identical, both regarding the structure of the sleeve part 59A itself as well as regarding the arrangement the blind holes 60 (FIG. 5) which receive the bristles 50. It is therefore not necessary to choose "a pair" of such half-shells 59A to form a brush 51 - every two half-shells fit together as well as any other. The bristles two assembled half shells 59A are therefore not mirror images of each other juxtaposed - they are arranged such that by rotating the brush 51 by 180 ° around the longitudinal axis of the shaft 57, the bristles 50 of the one half-shell 59A enter the previous positions of the bristles 50 of the other half-shells 59A.

The half shells 59A are each with fasteners in the form of continuous Provided holes 61. This allows bolts (not shown) to pass through to connect the half-shell to the shaft 57. The shaft 57 assigns For this purpose, two rows of holes (not shown), each with one Provided internal thread, the holes in these rows with the holes 61st match. However, alternative (preferably easily detachable) fastening means can be used be provided.

Of course, more than two longitudinal parts can be used to close the brush 51 form. The simple solution with two half shells offers significant advantages compared to more complicated constructions.

Figure 6 shows a first embodiment according to the present invention, which as Modification of the arrangement according to Figures 3 to 5 is formed. Accordingly are a flat bar 13 (including clothing 14), the sleeve 59 and the bristles 50 (if still present) is shown again schematically in FIG. 6. The direction of movement of the flat bar 13 and the direction of rotation of the sleeve 59 are by arrows indicated.

As usual when garnishing card covers, the garnish 14 is as flexible or as semi-rigid set executed (see the aforementioned manual of textile production, Volume 2, page 52), the individual clothing elements 40 made of wire (flat wire or Round wire), each with a so-called knee 41 are formed. Bristles 50 are pushing down to the bottom of the set 14, i.e. down to the surface of the rod 13, from which the wires 40 protrude to thoroughly clean the clothing. But it is in In this case, only half of the circumference of the sleeve 59 is covered with bristles 50 the other half carries grinding elements 42, as described in more detail below with reference to FIGS. 9 or 10 is explained. The sleeve 59 serves in this case as a carrier for the Grinding elements 42, which together with their carrier and its holder Form grinder according to the invention.

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 rotating piece with a relative movement of the element and the wire, the 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) - see also FIGS. 7 and 8. The speed the free end area of each element 42 is still larger than that Speed of the clothing wires 40 in the direction of movement 15. As the Grinding elements 42 are moved past the clothing elements 40, they penetrate therefore in the set, with its free end regions on both sides of the head parts of the Wires are deflected (Fig. 7).

The head section of each wire element is provided with a side grinding, i.e. the Side surfaces 43 (Figs. 7 and 8) 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 Abrasive 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 Borsten 50 "fehlen",
• es ist allenfalls nicht möglich, durch die Einstellung der Drehzahl der Welle 57 (Fig. 3) 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 FIGS. 6 to 8 has certain advantages when retrofitting existing cards. 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, not shown here) already exist. Furthermore, the design can easily be implemented in that a "half-shell" according to FIGS. 4 and 5 is provided with grinding elements 42 instead of bristles 50. The lid cleaning is in constant use (as long as the card is running), the lid wires are "constantly" ground accordingly. However, certain disadvantages also have to be accepted:

• the cleaning effect decreases because half of the bristles 50 are "missing",
• at most it is not possible to optimize both the cleaning and the grinding action by adjusting the speed of the shaft 57 (FIG. 3),
• 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.

In certain cases, it will therefore prove to be more advantageous to grind one to provide its own infrastructure in the card, in particular its own holder for the carrier (on which the grinding elements 42 are attached) and its own (if necessary controllable) drive. This allows a relative speed of the grinding elements compared to the wires of more than 15 m / sec (e.g. 20 m / sec). Such a relative speed is not optimal for a cleaning bristle. The The grinding point is thereby separated from the cleaning point and is preferably located viewed after the cleaning point in the direction of movement 15 (Fig. 6). When a Control program for grinding the lids is desired, it can in the Card control can be integrated. But if the grinder from the Cleaning device is independent, it need not have a sleeve 59 as a carrier and it doesn't have to be rotatable. The relative movement between the Grinding elements and the wires can hardly be moved solely by the movement of the wires direction 15 (Fig. 6), i.e. it’s usually not enough that the holder of the grinding device to the grinding elements stationary on the card frame Fasten.

As a further alternative, however, the grinding elements could be linear along the Movement path of the flat bars 13 are moved, this arrangement too Problems could arise because it is generally undesirable for the abrasive elements hits the free end of a wire first. After a grinding stroke in one Direction that the grinding elements approach the free end of each wire "from behind" or sweeps over, the grinding elements would therefore have to be "pulled out" and open be returned to a beginning of the stroke, which is cumbersome and therefore expensive. The Lifting movement also requires a relatively large amount of space in the revolving lid assembly. From these For reasons, the carrier for the grinding elements is preferably rotatable in the card held, regardless of whether it is formed by half-shells 59A or as a cylindrical sleeve is. For the sake of simplicity, FIGS. 9 and 10 only show the latter option.

The variant according to FIG. 9 comprises a helical arrangement of Grinding elements 42 along a cylindrical carrier. Each element is as one Bristle 45 (see in particular the detail - Fig. 9A) is formed. The bristles 45 are shorter 6 and the free end portion of each bristle 45 is coated with an abrasive to form an abrasive area. The coating consists e.g. made of hard particles 46 (abrasive grains, diamond grains or the like) attached to the bristle 45 by adhesive. The helical row of elements 42 extends the full length of the beam and therefore across the entire working range. On the side of the Sleeve 59 may mirror a second row of grinding elements to the first row to be ordered.

The variant according to FIG. 10 also comprises a helical arrangement of Grinding elements 42, this time in the form of grinding flaps 47 (see in particular 10A), also with an abrasive in the form of hard (abrasive) particles are coated. The fins 47 can e.g. can be formed from "sandpaper".

The embodiment according to FIG. 11, which is only partially shown, corresponds to that Variants according to Figures 9 and 10 when they by coating one Basic body is formed. 11, the base body is a disk 48 available, both side surfaces of the disc are coated with hard particles, to form "emery discs". The disks can be annular and in the radial direction have a changing thickness so that they are on the outside Edge is thinner and thicker on the inner edge. The inner part of each disc can attached to a bracket (not shown) which rotatably mounts in the machine becomes. The attachment is accomplished in such a way that when turning the Rotate the washers 48 with the support. Form your outer (relatively thin) border areas resiliently bendable grinding areas similar to the free ends of the elements 42 operate in the solution of Fig. 7, i.e. they give way when they touch the head area of a wire, but slide over the side surfaces 43 and grind them.

The solutions according to FIGS. 12 and 13 are designed differently in that they do not Coatings have, but an "aggressive" design of the Use the basic body yourself. For this purpose, the surface of each of the elastic bendable body (or each "flexible finger") "profiled", in one case (Fig. 12) by longitudinal ribs 49A and in the other case by transverse ribs 49B. The material of the Element or finger should be compared to the metal of the sanded Wire can be chosen relatively hard, e.g. Steel bristles.

The previous description assumed that the grinding device in the card should be installed. However, the invention is not restricted to this. The card could e.g. only have attachment points where a bracket of Grinding device can be attached. The device itself could then by Card carried to card and only mounted on a specific card if necessary and put into operation. Such a device could drive your own to rotate the carrier that carries the abrasive elements, or could but only have a coupling to a temporary connection to the drive the machine.

The preferred solution includes a grinding device with its own "infrastructure" (Carrier, drive, etc.) and with grinding elements according to FIG. 9, the carrier 59 preferably "fully equipped" (instead of just with individual helical rows of Grinding elements), i.e. practically over the entire circumference with grinding elements is busy.

Claims (13)

1. A method for grinding the clothing of a card flat by means of a grinding device with a carrier and a plurality of individual grinding elements, whereby the carrier is mounted on a retaining element in a movable manner, characterised in that

   The grinding elements are elastically bendable in such a manner that, when the carrier is moved, they penetrate between the clothing elements of the clothing which is to be ground, slide over the head parts of the clothing element, and in this situation grind them; and

   The carrier is moved in such a direction that a grinding element comes into contact from the rear with a clothing element which is to be ground, before the free end of the clothing element is covered.
2. A card flat with a grinding device for the clothing of the flat, characterised in that the grinding device comprises a plurality of individual grinding elements and a movable carrier for the grinding elements, whereby the grinding elements are elastically bendable in such a manner that, when the carrier is moved, they penetrate between the clothing elements of the clothing which is to be ground, slide over the head parts of the clothing element, and in this situation are capable of grinding them.
3. A carding machine according to Claim 2, characterised in that the grinding elements are distributed over the working width of the carding machine.
4. The carding machine according to Claim 3, characterised in that the grinding elements are carried by a longitudinal carrier, for preference in such a way that each grinding element is secured at one end to the carrier and projects from its securing point transversely to the carrier.
5. The carding machine according to Claim 4, characterised in that the arrangement is such that, when the grinding elements are worn out, i.e. are no longer suitable for use, they can be replaced by new grinding elements by replacing the carrier.
6. The carding machine according to Claim 5, characterised in that the carrier is formed from half-shell elements.
7. The carding machine according to one of Claims 4 to 6, characterised in that the carrier is mounted so as to be rotatable.
8. The carding machine according to Claim 7, characterised in that the carrier is mounted on the carding frame by means of a retaining element.
9. The carding machine according to Claim 8, characterised in that the carrier is mounted in such a way in relation to the revolving flat in such a way that the flat is ground during the "run-back".
10. The carding machine according to Claim 8 or 9, characterised in that the carrier and the retaining element together form a device which is integrated into the carding machine, in such a manner, for example, that the device is taken into operation with the carding machine itself.
11. The carding machine according to Claim 10, characterised in that the carding machine comprises a drive or a control unit for the grinding device.
12. The carding machine according to Claim 11, characterised in that the drive for the grinding device is arranged in such a way that the grinding elements are moved in a direction such that the grinding element comes into contact with a clothing element which is to be ground before the free end of the clothing element is slid over.
13. The carding machine according to one of Claims 10 to 12, characterised in that the device is integrated into a cleaning system for the flat.

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