EP0894877A2 - Dirt removing apparatus for fiber cleaning aggregates - Google Patents

Abstract

The appts. to separate dirt from a flow of air and fibres, in a fibre cleaning assembly, has a separator after a separation gap, which is connected to a suction system. The separator can be pitched at an adjustable angle against the air/fibre flow.

Description

The invention is concerned with dirt separation devices (Dirt separators) for use in fiber cleaning units Spinning mill and corresponding aggregates.

Basically, it is known to have dirt separators with "knives" both to be provided on the card as well as in (flake) cleaning machines. In a conventional one Flake cleaner is usually the template in the form of a cotton ball delivered and the cleaned material is (pneumatically) as flakes to the next Machine forwarded in the blowroom line. The separation device works in the card of fiber material in the form of a fleece, the degree of opening of the fiber material in this fleece is much higher than the degree of opening of the fibers in flakes. In the flake cleaner, the material still has a loose cohesion, which in the Card has disappeared (or at least much lower).

This invention is concerned with both dirt removal devices and fiber cleaning units for flake cleaning, where the material to be cleaned still has not been opened up to individual fibers, as well as for the card where the material in is in the form of a fleece, which consists of fibers opened up to individual fibers. The invention is specifically for use in a new cleaning module EP-A-810 309 designed, this module is located in a card filling shaft. However, the invention could also be used in an (otherwise) conventional flake cleaner or in the card.

State of the art:

A typical conventional carding machine for dirt removal is shown below will be explained with reference to Fig. 1, why an explanation of the status the technology is dispensed with here.

Flake cleaners with adjustable separating elements are in the following documents shown:

DE-A-27 12 650 (Schubert & Salzer) - proposes a cleaner with several rollers, of which each roller is provided with a housing having a separation opening is. Each separation opening is assigned to a separation edge and the separation edges are adjustable attached to housing parts. About the way of hiring nothing is said in DE-A-27 12 650.

EP-A-481 302 (Rieter) - deals with an adjustable grate arrangement. The figures 5 and 6 and the corresponding description show the setting of certain ones in detail Rust elements. These figures are also listed in the present application, which is why a more detailed explanation can be omitted here.

EP-A-459 569 (Marzoli) - after which an essentially conventional cleaning device is provided with separation knives, the knives shortly before the material exit can be supplemented with an adjustable dividing surface.

US-B-5,031,279 (Trützschler) - according to which many individually adjustable elements on one common carriers are provided. The knives are said to be roughly complete radial directions can be set with respect to a roller.

US-B-4,805,268 (Trützschler) - according to which a motor-driven actuator system for various adjustable elements is provided. In this case it is both radial Adjustment of a knife as a whole as well as swiveling around an axis are provided, that coincides with the knife edge. In another version is a Guide element adjustable, but the knives are fixed. Suction are mentioned in this document, but there are none in the relevant figures (FIGS. 3 and Fig. 6) shown.

In the prior art there is often talk of "knives" (also called "blades"), whereby a "knife" usually has a blade that faces a rotating one Roller is adjustable. But it is also known to perform a similar function through a Edge (also called "separating" or "excretion edge"), this edge is formed on an element that is not necessarily designed as an adjustable "knife" is, e.g. on a "grate bar". The invention is also applicable in such arrangements. In order to avoid cumbersome repetitions in the description, subsequently spoken of a separating element with an edge, this Term includes the special forms "stick", "knife" or "blade" and "blade".

Summary of the prior art:

A fiber processing machine with a rotatable roller is known, wherein a Fiber / air flow in a "working gap" between the circumference of the roller and one the surrounding formwork flows. A separation element is in the formwork intended. The selectivity of the separation is achieved in that the roller with a fiber-containing set is provided, while the centrifugal dirt particles possibly heavier than the fibers or a higher flow resistance than the fibers have to push radially outwards (against the formwork), where they by means of the separating element can be deflected from the stream. The working gap usually extends over almost the entire axial length (over the "Working width") of the roller.

At least from EP-A-481 302 and US-B-4,805,268 it is in such a machine known, the angular position of a separating element relative to the material flow adjust to influence the excretion effect. At least from US-B-5,031,279 and US-B-4,805,268 it is known to use a separating element in the Direction of transport upstream guide element to adjust the separation effect to influence.

The earlier invention or the earlier application:

The present invention can be done with the invention (the "previous invention") EP-A-848 091 (the "previous application") can be combined.

The object of the previous invention is to keep the air balance downstream to improve a separation element provided with a suction. Thereby The formation of nits caused by air turbulence in a fiber processing plant Machine can be reduced. But it can also improve dirt removal be achieved in and of itself.

The previous invention therefore sees a fiber processing machine with a separating element before, with both fiber and air in a substantially predetermined Direction of transport past the element and dirt particles to be removed selectively from the fiber / air stream by means of the element. The Invention is characterized in that at least one measure is taken to affect the air flow in the zone downstream of the element. The said measure can be taken such that air turbulence downstream limited (in the direction of transport) by the element or even eliminated (if possible).

The measure preferably consists in the air being discharged through the element is at least partially replaced by newly introduced air. The newly introduced air expediently flows into the zone adjoining the element, e.g. within a distance of about 50 mm downstream of the element and preferably within a distance of less than 20 mm.

The arrangement is preferably self-adjusting with respect to the inflowing amount of air, i.e. (e.g.) that there is no need to work with blown air. If the free flow cross section is adequately dimensioned by the air intake duct, the necessary is created Air flow due to negative pressure in the room downstream of the element.

The cleaning module

The present invention can advantageously in a module according to the Swiss Patent application no. CH 1819/97 dated July 30, 1997 can be used. Such one Module comprises a transport roller for a fiber / air stream and a plurality of dirt separators distributed along the circumference of the roller, where each device has a separating element, a separating gap and one assigned to the gap Dirt removal includes.

The invention

The present invention is concerned with dirt separators and with fiber cleaning units formed therefrom. It is the object of the invention that To improve the effectiveness of the known arrangements.

The invention provides a dirt separator that can be attached to a Fiber / air flow is provided. The device includes a separating element, which in selectively selectable positions relative to the current can be set and held can as well as a dirt removal for what is deflected from the stream by the separating element Material. The device also includes a guide element, which is a separating element can be connected upstream in the transport direction, the location of the guide element is adjustable transversely to the direction of transport to the corresponding working gap width to change. The arrangement is such that adjustment movements of the Ausscheideelementes accompanied by predetermined movements of the guide element become.

The device can be arranged such that the guide element by an adjustment process narrow the working gap and the cutting element can be rotated, around a partial flow deflecting surface closer to an imaginary, essentially radial Level. The reverse setting process should of course also be possible. Setting means for the separating element and for the guide element can be linked in this way or be united that a certain adjustment movement of the separating element (Guide element) by a corresponding movement of the guide element (Separation element) is accompanied. However, a mechanical connection is not essential required, since the desired effect is at best provided by a suitable control for the setting actuators can be achieved, then for the A controllable drive can be provided for each of the two elements. It can affect everyone Case be made sure that a change in the position of the separating element, which brings about a certain technological (elimination) effect, is accompanied by a change in the position of the guide element, which the said Effect supports.

"Accompaniment" therefore does not necessarily mean simultaneity. The movements of the elements can take place sequentially, the sequence being preprogrammed.

The separating element and the guide element can both be in one Dirt removal device can be provided, which is assigned to a dirt removal is.

The separating element can be arranged such that its immersion depth in the fiber / air flow is adjustable. In the preferred arrangement with variable immersion depth a fiber cleaning unit includes several dirt separators, said separation element in one device and the upstream guide element are provided in another device. The preferred arrangement is particular designed for use in a flake cleaner, but could also e.g. in a fixed lid card can be used.

Embodiments of the invention are described below using the schematic drawings described as examples.

Fig. 1

einen Schnitt durch eine bekannte Vorrichtung zur Verwendung in einer Karde,

Fig. 2

eine schematische Darstellung einer ersten Ausführung nach einer ersten Variante der Erfindung, wobei Fig. 2A die wesentlichen Beziehungen zu einem grösseren Massstab zeigt,

Fig. 3

einen Schnitt durch eine Anordnung nach der früheren Erfindung (EP-A-848 091),

Fig. 4

eine schematische isometrische Darstellung der bevorzugten Absaugung in einem Gerät nach Fig. 3,

Fig.5A und

Kopien der Fig. 3A und 3B aus unserer schweizerischen Patentanmeldung

Fig.5B

Nr. 1819/97 vom 30 Juli 97 und

Fig. 6

eine bevorzugte Ausführung der ersten Variante der Erfindung zur Verwendung in einem Reinigungsmodul nach Fig. 5,

Fig. 7 und 8

Kopien der schon erwähnten Figuren 5 und 6 aus EP-A-481 302,

Fig.9A

ein Diagramm zur Erklärung der neueren Einstellungsprinzipien in einer zweiten Variante, wobei die Figuren 9B, C, D und E schematisch die Strömungsverhältnisse bei verschiedenen Einstellungen in der Anordnung nach Fig. 9A darstellen,

Fig.10A und 10B

Ein Ausscheidegerät nach der zweiten Variante für das Reinigungsmodul nach Fig. 5, zu einem grösseren Massstab abgebildet, und die Fig. 10C ein Detail aus Fig. 10A zu einem noch grösseren Massstab,

Fig. 11

eine schematische Darstellung einer Alternativanordnung zur Verwendung in der Putzerei (in einen Feinreiniger),

Fig. 12

eine Weiterentwicklung der zweiten Variante der vorliegenden Erfindung durch Kombination mit der früheren Erfindung, und

Fig. 13

eine weitere Ausführung der zweiten Variante.

It shows:

Fig. 1

2 shows a section through a known device for use in a card,

Fig. 2

1 shows a schematic illustration of a first embodiment according to a first variant of the invention, FIG. 2A showing the essential relationships on a larger scale,

Fig. 3

a section through an arrangement according to the previous invention (EP-A-848 091),

Fig. 4

3 shows a schematic isometric illustration of the preferred suction in a device according to FIG. 3,

Fig.5A and

Copies of Figures 3A and 3B from our Swiss patent application

Fig. 5B

No. 1819/97 dated July 30, 97 and

Fig. 6

2 shows a preferred embodiment of the first variant of the invention for use in a cleaning module according to FIG. 5,

7 and 8

Copies of the already mentioned FIGS. 5 and 6 from EP-A-481 302,

Fig.9A

FIG. 9B, C, D and E schematically represent the flow conditions at different settings in the arrangement according to FIG. 9A,

Figures 10A and 10B

A separation device according to the second variant for the cleaning module according to FIG. 5, shown on a larger scale, and FIG. 10C shows a detail from FIG. 10A on an even larger scale,

Fig. 11

a schematic representation of an alternative arrangement for use in the blow room (in a fine cleaner),

Fig. 12

a further development of the second variant of the present invention by combination with the previous invention, and

Fig. 13

another version of the second variant.

State of the art in the card:

1 shows a typical dirt removal device (or a dirt removal device) 391 for a card. In Fig. 1 is the outer surface (the impact circle) of the main drum indicated by the reference numeral 311, the direction of rotation of the drum is indicated by the arrow D. The outer surface 311 corresponds to the tips of one Set, which is not shown here, however, since it is not essential for the explanation plays and is well known by the expert. According to FIG. 1, the device 391 comprises a first shuttering segment 421, which serves as a support for trimmed sets Carding elements 121 is formed, and a second shuttering segment 441, which as Carrier for further elements 161 provided with trimmings is formed. The working gap is indicated by 110, with a separation gap 180 between the segments 421, 441 remains open and opens into working gap 110. The separation gap is 180 covered by a hood 120 which at one end (not shown in Fig. 1) at one suitable discharge in the form of a suction is connected to through the Gap 180 to remove waste that has been discharged.

The second segment 441 is provided with a knife 220 which one into the working gap projecting separating edge 240. The knife 220 is by screwing 250 (only one screw 250 visible in FIG. 1) on an end part 151 of the segment 441 attached. The end part 151 has a bearing surface 170 for a corresponding one Surface 119 on knife 220. After loosening the fixing screws 25G the knife 220 can be displaced in the directions indicated by the double arrow EP are, wherein the bearing surfaces 170, 190 slide against each other. This can the position of the separating edge 240 relative to the lateral surface 311 (or that not shown Set) can be changed. The knife 220 also extends over the full working width, it is important that the position of the cutting edge is opposite the lateral surface 311 is set or maintained as equal as possible across the width. The hood 120 is pivotally mounted on the first segment 421 (holding means not shown) and prints with a rubber gasket 260 at the distance from the separation edge 240 Face of the knife 220.

The fiber / air flow FLS is in the working gap 110 upstream from the edge 240 given by the peripheral speed and the "surface roughness" of the drum. The latter parameter is of course through the procurement of those not shown Garnish influenced. The set position of the knife 220, opposite the outer surface 311 (or in relation to the clothing carried by the lateral surface) the "immersion depth" of the separating edge 240 in the stream FLS and therefore the proportion of the incoming Fiber / air flow FLS, which "peeled" by the knife 220, into the Separation gap 180 is deflected and thereby removed from the working gap 110. The adjustability is important because the proportion of the processed fiber material to be eliminated depends on the template and not from the start (when constructing the Machine) can be set. This general mode of action also applies to all versions described below.

The immersion depth of the separating edge (the removed part) should be selected in such a way that the "peeled" air layers have a relatively large amount of dirt particles (if need be, too Short fibers) and a few good fibers. In most cases, the separating edge 240 set significantly closer to the lateral surface 311 than for the one opposite the drum Area 281 of segment 441 is possible - i.e. the working gap 110 spreads in the region 291 downstream of the separating edge 240 in the radial Direction from and to a degree that depends on the current setting of the knife 220 depends.

In the working gap downstream from the separating edge, the dissipated current component is "missing", whereby the remaining portion has to spread to the extended working gap to fill. In the zone Z of the working gap adjoining the separating edge 240 there is negative pressure, which is at most a little more air (loaded with dirt particles) pulls between the separating edge 240 and the lateral surface 311 than actually desired is. In addition, the spreading air flow tends to form eddies at the separating edge 240, which results in turbulence in the area 291 downstream of the separating edge 240. Such turbulence can cause fibers to "roll together" lead - this creates nits. At most, swirls can also occur in the separation gap form themselves, which at most leads air and dirt particles back into the working gap.

First variant of the invention :

Fig. 2 shows part of an embodiment of a first variant of the invention, the one Represents improvement of the prior art of FIG. 1. An opening roller is included 33 indicated. It is provided with a set 120, the impact circle (or a Lateral surface) 440. A carrier T1 carries both a knife M1 and one Guardrail (also known as a "guardrail") LS2. A carrier T2 carries another Guardrail LS1, and a carrier T3 carries a second knife M2.

Each carrier T1, T2, T3 is rotatably mounted about a respective axis of rotation D1, D2, D3. The carriers can be shared by a common actuator system (not shown) or each one can be rotated around the respective axis of rotation, as with the double arrows is indicated.

Each guide rail LS has a guide surface LF and each knife M has an edge K. The The elements shown thus form two dirt separation devices SG1, SG2, whereby each device is provided with a drain, which in this case is flexible Hood H includes. By the simultaneous rotation of all carriers, e.g. clockwise, all elements M and LS are adjusted simultaneously. Of course, Similar devices are provided, the description of the devices shown SG1, SG2 is also sufficient to explain the other devices.

The main relationships of this arrangement are more detailed (to a larger one) Scale) shown in Fig. 2A again, with the same reference numerals referring to the same Parts of Fig. 2 indicate. 2A shows only the main elements of the device SG1 (with parts of knife M1 and guardrail LS1), the description of the mode of operation but also applies to all other devices. The (radial) working distance (gap width) AB1 between the separating edge K and the impact circle 440 can be selected selectively. This The gap width is variable depending on the currently selected angular position of the carrier T1 about the axis of rotation D1. If e.g. the carrier T1 counterclockwise is rotated in Fig. 2, the edge K dips deeper into the fiber / air stream and reduces the working distance or the gap width AB1. Depending on the current The knife M (or the separating edge) peels the size of this working distance K) a thick or a less thick layer of air from the working gap.

The guide surface LF on the rail LS1 limits the spread of the flow FLS upstream of the separation gap 180. The effect of the guide surface LF depends essentially on the size of the working distance between the delimiting the gap 180 Nose N and the impact circle 440. This working distance can be divided into two Split "component", namely a component that corresponds to the above-mentioned working distance AB1 is the same and an additional component AB2.

E1

Eine Vergrösserung des Abstandes AB1 führt zu einer Verminderung der abgeschälten Luftmenge, (für eine vorgegebene Strömungsgeschwindigkeit), weil die abgeschälte Schichtdicke reduziert wird,

E2

Umgekehrt, eine Verkleinerung des Abstandes AB1 führt zu einer Zunahme der abgeschälten Luftmenge,

E3

Eine Vergrösserung des Zusatzabstandes AB2 führt zu einer Zunahme der abgeschälten Luftmenge, und

E4

Eine Verkleinerung des Zusatzabstandes AB2 führt zu einer Verminderung der abgeschälten Luftmenge.

The effects of individual adjustment movements of the elements shown can now be summarized as follows:

E1

Increasing the distance AB1 leads to a reduction in the amount of peeled air (for a given flow rate) because the peeled layer thickness is reduced,

E2

Conversely, decreasing the distance AB1 leads to an increase in the amount of air peeled off,

E3

An increase in the additional distance AB2 leads to an increase in the amount of air peeled off, and

E4

A reduction in the additional distance AB2 leads to a reduction in the amount of peeled air.

When the thickness of the peeled air layer (the peeled air amount) increases the amount of dirt particles and short fibers (the Waste) too, since the outer (peeled) air layer has a relatively high percentage such substances (particles).

Well, the arrangement according to FIG. 2 is such that a change in the angular position of a carrier T as well as a change in the position of a knife also causes a change in the location of a guardrail in such a way that the resulting exit effects mutually support each other, i.e. they either work in the sense of an enlargement or both in the sense of one Reduction in the amount of waste. In other words, an adjustment movement E1 is always with an adjustment movement E4 and an adjustment movement E2 is always with one Adjustment movement E3 (by means of the common carrier T) linked. The changes, that arise from the adjustment of a single carrier T produce their excretion effects however not in the same device, but in successive devices, i.e. the carrier T1, for example, carries the knife M1 for the device SG1 but the guide rail LS2 for the device SG2. The carriers T1, T2, T3 etc. must therefore in the same sense to be turned around. The reasons for this arrangement can be seen from an execution of the earlier invention will be clarified, as now explained with reference to Figures 3 and 4 becomes.

The device according to FIG. 3 is formed according to the previous invention (cf. EP-A-848 091) and it represents a further development of the device according to FIG. 1. A profile piece 50 (e.g. made of hard anodized aluminum or steel) extends over the whole Working width. It is provided with a longitudinal channel Ka and an opening 52 which serves to form the separation gap 180. The profile piece 50 also has two formwork parts 54, 56, of which one part 54 is provided with a guide surface 58, which together with the roller (not shown in Fig. 3, see impact circle 311, Fig. 1) the Working gap limited. The second part 56 serves as a carrier for a guide element 60 which is interchangeably attached to the support to after mounting the roller or its To face the set.

The tapered wall part 62 between the surface 58 and the opening 52 is with a recess 64 which receives a blade blade 66. It is a fastener (Not shown) is provided so that the separating edge 240 is adjustable on the sheet 66 in the directions indicated by the double arrow EP compared to the Working gap can be positioned. The one deflected from the working gap by sheet 66 Air is replaced at the end of the baffle 58 away from the edge 240. Between the wall 68 of the profile piece 50 and the adjacent formwork element 70, an air supply opening 72 is left open, which in operation the working gap connects with the environment outside the formwork. The distance S of the opening 72 from edge 240 is preferably less than 50 mm. The opening 72 is natural in the form of a "slot" so that the opening extends all the way Working width extends. The part 70 and the profile piece 50 can be independent of one another attached to the drum shields.

The guide surface 58 should be designed in this way and set close to the impact circle of the roller that there is no significant turbulence in the downstream working gap of the edge 240 remaining fiber / air flow arise. For this purpose the Surface 58 advantageously be set so close to the roller that none substantial spread of current is required after edge 240. Thereby there may also be a pressure drop in the working gap at or downstream from the edge 240 largely avoided. By maintaining suitable pressure conditions at the edge 240, the return of air from the opening 180 can be avoided become. It is also possible to more precisely determine the "peelable" portion of the fiber / air flow by adjusting the blade 66. Without this measure Under unfavorable conditions, air can circulate inside the opening 52 is generated and dirt particles back into the working gap reach.

According to an advantageous variant, the inner surface 74 of the profile piece 50 becomes such designed that the discharged air enters the longitudinal channel Ka approximately tangentially and then, initially following the inner surface 74, into the area around the center of the longitudinal channel to be led. This creates a spiral movement of the air, including the carried Dirt particles or fibers, as is shown schematically in FIG. 4. The removal takes place by means of suction, preferably from this central area one end AE (Fig. 4) of the channel Ka, and it is in the central area at the other end ZE air introduced into the channel Ka. This makes it possible to cover the entire working width maintain approximately constant recording conditions at the separation gap 180.

Compressed air is preferably not used, but rather that in the working gap prevailing negative pressure is used to "substitute air" through the opening 72 move in. The system is therefore self-adjusting - so much air is drawn in than is necessary to avoid a substantial negative pressure. That through the separating edge generated vacuum zone is therefore by means of a suitable connecting channel connected to an air source.

The previous invention, in particular the embodiment according to FIGS. 3 and 4, enables very narrow settings of the edge 240 or the surface 58 with respect to the tips the clothing on the roller. The distance of the edge 240 from the clothing tips can e.g. in the range 0.25 to 0.5 mm, and the distance of the surface 58 from the clothing tips can e.g. 0.8 mm.

An air inlet according to the previous invention is also in the execution of Fig. 2 is provided. In this case there is T between each carrier and the respective guide rail LS provided a channel 72, both with the environment and with the Working gap is connected. The suspension of the rail LS on the carrier T must be designed accordingly, for which solution examples explained in the earlier application were. An adjustable means, e.g. a slider 75 is provided in order to be able to influence the amount of air introduced via the duct 72. Of the Distance between an air-discharging edge K and the air inlet following it 72 thus depends on the dimensions of the carrier T. If this is undesirable (e.g. too large), each carrier T can be provided with air inlet channels 73 (shown with dashed lines) be provided to substitute air practically immediately after peeling off an air layer to be able to introduce K through the preceding edge.

From Fig. 2 it can also be seen that where several devices are placed together. the air inlet downstream from an edge an air inlet upstream from of the next air-discharging edge K. This effect is especially for that Device SG1 indicated. The air flowing between the rail LS2 and the carrier T2 inflows, the working gap can already through the separation gap of the device SG1 leave, i.e. can be peeled off from the edge K of the knife M1. This Air content serves as "purge air" and helps to transport the waste. By a suitable one Designing the guide surface LF of each rail LS can create a laminar flow pattern between the respective channel 72 and the subsequent separation gap guaranteed become

In principle, a device according to FIG. 3 is also possible by means of rotary movements according to the present invention to readjust the profile piece 50 with a Axis of rotation are provided, so that the adjustment of the knife 66 in the direction of the arrow EP (Fig. 2) replaced by rotating the profile 50 about the axis of rotation (or at least added). Such an arrangement is apparently in US-B-4,797,980 has been indicated (column 2, lines 6 to 12), although not an example of such a device was shown in the U.S. script. In the US script is of two parts ("components") the speech, apparently meant the knife and the housing are. It is not clear in US-B-4,797,980 whether or how a guide surface is set should.

In any case, the position of the axis of rotation is in relation to the elements to be set of crucial importance. If the axis of rotation e.g. in the middle of the canal If Ka were provided (e.g. at location DA in Fig. 3), the edge would be 240 and the nose N on the guide element 60 together in the same direction of rotation (clockwise or counterclockwise) against the impact circle or away from it around the axis of rotation turned. An increase (e.g.) in the working gap width formed by the edge 240 would therefore be an increase in the working gap width formed by the nose N. accompanied. However, these two adjustment movements result in opposite technological (excretion) effects, i.e. technologically they stand out Part on.

3 to the present invention by means of an axis of rotation the axis of rotation would e.g. be provided at the location DB in FIG. 3, i.e. on a connecting line between the edge 240 and the nose N. This could but can only be implemented in the card with great design effort, in particular this is because the width of the separation gap 180 in the card is relatively small. It is therefore difficult to combine both essential elements of a single dirt separator to achieve a mutually supportive effect using a To adjust the axis of rotation. An actuator system would be possible for a device according to FIG. 3 to provide the two essential elements (the knife 66 and the guide element 60) coordinates linear shifts to the desired mutually supportive Produce effects.

The embodiment according to FIG. 2 avoids this problem in that the knife has one device SG1 preceding in the transport direction with the guide rail LS2 of the subsequent device SG2 linked via the common, adjustable carrier T1 is. The distance between the knife M1 and the guide rail LS2 is so large that it is not necessary to rotate the axis of rotation D1 directly on a line between the edge of the Knife M1 and position the nose of the LS2 rail. The devices SG1, SG2 etc., however, must be adjusted in a coordinated manner in order to achieve the desired overall effect to achieve.

The previous statements have been explained in connection with the card. The The arrangement according to FIG. 2 could be in a so-called fixed-lid card (e.g. according to DE-Gbm-94 19 619.2) can be used. The invention (also in the embodiment according to FIG. 2) but is primarily intended for use in flake cleaners, as below is explained with reference to Figures 5 and 6. 5 shows a flake cleaner according to CH 1819/97 from 30.7.1997.

5A shows in cross section the essential elements of a new card filling chute 8 with a cleaning module, in particular the upper part of the shaft ("feed shaft") 31, the lower part of the shaft ("reserve shaft") 34 with conveyor rollers 35, the Material feed 32 with a feed roller 321 and a feed trough 322 and an opening roller 33. A fill level sensor 325 is also shown in Fig. 5A. The one from the The cotton wool 9 supplied to the rollers 35 is shown in FIG. 5A in a channel 36 for the not shown Feed roller of the carding machine continued. The side view (Fig. 5B) shows the cleaning module viewed from the same shaft in the direction of arrow R (Fig. 5A), in which Fig. 5B certain elements are partially cut away to the underlying To be able to display elements. The length of the roller 33 determines the working width B of the machine. This working width can be 1 m to 2 m, preferably 1 m to 1.5 m be. The feed 32 must flakes as evenly as possible over the working width B can deliver to the roller 33, and the cleaned material must be as uniform as possible be distributed over the width of the shaft part 34. The rollers 321, 33 are rotatable mounted in side walls (not shown) and carried by these walls. The The axis of rotation of the roller 33 is indicated at 170. The directions of rotation are each with Arrows indicated.

The opening roller 33 provided with a clothing (preferably in the form of a needle roller) works here as a transport roller, which the fiber material between the Material feed 32 and the cotton-forming device 34,35 transported. In the direction of rotation considered this transport roller, the "takeover point" is where the roller 33rd Fiber material takes over from the fiber beard offered by the feed, something before the highest point on the transport route. The fiber material is sent to three separators 104,106,108 is then passed into a deflection area 20 to arrive at the upper end of the lower shaft part 34. The elimination devices 104,106,108 are formed essentially the same, so that the description of the device 104 can be regarded as representative of the other two devices 106, 108 can. Each separating device thus comprises a respective separating element 110 and a guide element 112 preceding the separating element in the transport direction. Between the guide element 112 and the separating element 110 assigned to it there is the mouth of a separation gap 114. The three devices 104, 106, 108 together form a fiber cleaning unit. A preferred embodiment of this Aggregates in a first variant according to the present invention is as follows will be described with reference to FIG. 6. For now, however, the description of the general Arrangement completed.

It can be seen from FIG. 5A that the first separation device 104 is practically “immediately” connects to the feed roller 321. Between the feed roller 321 and this the first separation device 104 there is only one guide rod 116 in the form of a traverse, which between the material captured by the opening roller 33 in the working gap the first guide element 112 and the transport roller. It is also each only a smaller distance s between a preceding device 104 or 106 and the following device 106 or 108 available. The front edge of the last separation element 110 is therefore in a horizontal plane E, which the Includes axis of rotation 170 of the roller 33. This "geometry" is not absolutely necessary. The "level E" could e.g. moved further in the direction of rotation of the roller 33 e.g. by an angle of approx. 45 ° with the horizontal plane shown form.

However, the cleaning is now carried out at least in part "above" the roller 33, i.e. above the illustrated horizontal plane E. Gravity helps accordingly neither the excretion nor the removal of dirt. Any device 104,106,108 therefore preferably includes its own dirt removal system ensures that the material excreted by the respective element 110 from the Area of the transport route is removed. The material to be removed moves in the gap mouth and in the gap part adjoining it in one direction, the extends approximately tangentially to the roller 33. This material is preferred but redirected as soon as possible in a direction that is approximately parallel to the axis of rotation 170 extends, at least until it gets to one or the other side of the machine. Because gravity does not help, dirt can be removed using an air flow be solved and each device 104,106, 108 is preferably with its own Drain pipe 117 provided, which is parallel to the axis 170 over the working width extends. The individual tubes 117 can on a machine side on a common Suction line (not shown) can be connected. The connection can be solved according to the principles for the card in EP-B-340 458 and EP-B-583 219 were declared. An alternative arrangement can be found in US-B-5,255,415.

With three separation devices 104,106,108 it is possible to achieve a sufficient degree of cleaning to achieve the cotton pad 9, even if (according to EP-A-810 309) the blow room has not undergone any fine cleaning (with a clamp supply). By the aforementioned shift of level E in the direction of transport could, however, accommodate for a fourth excretion device. That is still after cleaning moving with the roller 33 (after the front edge of the last separating element 110 remaining) fiber material can therefore be used for the deflection or the discharge into the Reserve shaft 34 are prepared. For this purpose, the material is initially Guide surface 22 guided closely to the outer surface of the garnished roller 33, the material flow tends to tangentially downward from the roller 33 in a direction to fly away. This inclination can be supported by an air flow L that is mixed with the material flow after the guide surface 22 (viewed in the transport direction) and continues to flow in said tangential direction. The air flow L flows past the tips 331 of the roller assembly or at most even the outer ends of these peaks through. A suitable means to determine the optimal flow direction determine is explained in more detail below.

The material flow is thus largely replaced by the roller 33 and in the led downward converging material deflection region 20. In case that individual flakes should adhere to the clothing of the roller 33 is that of the cleaning module Opposing formwork 323 of the roller 33 is provided with a knock-off or stripping edge 324, which flakes protrude from the clothing can strip and deflect into the area 20. The casing 323 can e.g. as Hollow profile, for example by extrusion. The corresponding one Part closes an adjacent trough part, which has no reference number which forms the trough 322. The latter part can also be formed as a hollow profile become.

The casing 323 is also provided with an inwardly projecting brush 326, with which also individual fibers remaining in the set or printed into the set Flakes are removed from the set and redirected to area 20 can before the relevant part of the garnished work surface back to the nip the feed 32 is returned. Brush 326 includes e.g. a support rod 327, which is received in a receiving groove in the casing 323, the Rod is provided with bristles protruding inwards. Such a brush can be easily occasionally replaced as a replaceable unit. The brush serves but not primarily the flake dropping, but rather the sealing of the gap between the roller 33 and the casing 323. This creates upstream of the brush 326 a back pressure, which also helps to counter the flake air flow to deflect the lower shaft part 34.

The aforementioned air flow L flows from a calming space 24 into a box 26, of which the one wall 25 is arranged obliquely around one side of the material deflection area 20 to form. The opposite side of this area 20 is formed in FIG. 5A by a vertical wall part 341 that slopes upwards the formwork 323 and adjoins the bottom of a conveyor roller 35. Of the Wall part 341 is provided with an opening for receiving the level sensor 325, is not perforated and can have a seal against the casing 323. The air flow flowing into the shaft part 34 can therefore be on this Do not escape the shaft side. The wall part 341 can, however, opposite the casing 323 can be moved to the "depth" of the shaft part 34 (in a horizontal Direction perpendicular to the working width).

The top edge of wall 25 (as viewed from axis 170) is behind you Sheet metal piece, which forms the guide surface 22. There is a swivel axis on this wall edge 23 attached, which extends beyond the side walls of the machine (see FIG. 5B) and outside of these walls with at least one adjusting lever 231 is provided. The axis 23 carries a wing 28, which together with the aforementioned Sheet piece forms an inflow duct for the air flow L. The piece of sheet metal itself is fixedly mounted opposite the roller 33, e.g. through a bent lip the top wall 27 of the box 26 is formed. By pivoting the wing 28 can but influences the width and the direction of the air flow L designed as a "curtain" or be optimized. The lever 231 can be operated manually or by a controlled actuator be operated.

The air flow L is generated by a fan 29 and flows in via a flap 21 in into the calming room 24. The blown air could be obtained from the environment become. In the preferred solution, however, it is circulating air from the shaft part 34 obtained through holes (not specifically shown) in a wall part 342, which in the embodiment according to FIG. 5A extends vertically downward from the lower end the wall 25 extends and faces the wall part 341. There are many "perforated" walls known for use in a cotton-forming shaft, so that a detailed description of the wall part 342 is unnecessary. In the preferred Solution, the perforated shaft wall is formed as a screen wall, the wall can be put together from parts (slats). No matter how perforated Wall is formed, the air emerging from the shaft part 34 in a chamber 343 collected and led down until they come through an intermediate piece 344 the fan 29 is forwarded. The air flow through the mass of fibers in the Manhole part 34 serves to compress the flakes stowed therein, which is uniformity the cotton wool formed between the wall parts 341, 342 and ultimately therefore the cotton 9 delivered by the rollers 35 is considerably improved.

The amount of air required can be determined empirically. The fan 29 will but preferably at a constant speed from a motor, not shown driven. The amount of air required can be by means of a slide 210 or the construction of the flap 21 can be adjusted.

5 can not only be used in a card slot. The same approaches can be used to design a "cleaning machine" that are to be used in a conventional blowroom line. In the When used in a fine cleaner, it will be possible to use a larger opening roller use. While the roller (needle roller) 33 has a diameter in the range 250 up to 300 mm, a fine cleaner should have an opening roller with a diameter larger than 350 mm, e.g. 400 mm. The working width can be in Range 1 to 1.5 m, e.g. 1.2 m.

In a fine cleaner it will at most be important to know the extent (the work surface) of the Use the opening roller more intensively than is possible or necessary in a filling shaft is because the fine cleaner has to cope with a higher material throughput (currently 500 to 600 kg / h). On the other hand, it is then not necessary to use the flake material to throw off because it is by a known pneumatic transport system to the next Machine is forwarded in the line. The "output" from the cleaning module the transport system can therefore be provided essentially below the feed which is a lot of space in the lower half of the roller for further separating devices (e.g. Elimination devices number 4, 5 and even 6) if necessary. The cleaning elements The lower half of the opening roller could also be separated from the separating devices 104,106,108, because on the lower half of the roller Gravity in material excretion or in dirt removal again Role play.

From Fig. 5A it can be seen that the air introduction principles according to Fig. 2 and 3 also in new cleaner module have been realized because the distances s between neighboring Elimination devices 104,106,108 serve as air supply openings that are connected to the "Surroundings" are connected to introduce air from the surroundings into the working gap to be able to. From Fig. 5A it can also be seen that the air intake upstream of the Separation gap has been realized in the new cleaning module. The distance s before (in viewed in the direction of transport) each separating device 106, 108 serves to import them "Transport air" for the following device. There are air inlet openings for the device 104 provided on the traverse 116.

Fig. 6 shows the preferred embodiment of a first variant of the fiber cleaning unit for a cleaning module according to FIG. 5. Each device 104, 106, 108 comprises in this version a profile 600 which e.g. can be formed as a continuous casting profile. The direction of transport (flow direction of the fiber / air flow FLS) is with an arrow indicated. Each profile 600 has a cavity 602, which forms the discharge channel, and has two approaches 606 and 608, respectively. The approach 606 forms a mounting surface for Working element 610, which is described in more detail below. The approach 608 forms one side of a guide channel 612 which opens into the discharge channel 602. The element 610 is firmly attached to shoulder 606 by means of screws.

Each working element 610 is in the form of an elongated rod with one over it Length uniform, essentially triangular cross-section formed. The element 610 has a separating edge at the front end (viewed in the direction of transport) 616, at the rear end a nose 618 and an intermediate guide surface 620, which is opposite in operation of the roller (not shown). The working elements 610 are arranged side by side in such a way that they are essentially continuous Form casing for the roller, with a separation gap 622 between each neighboring elements is formed. Each gap 622 opens into a respective one Channel 612.

The fiber cleaning unit according to FIG. 6 therefore differs from the unit in that respect 5 as the individual separation and guide elements 110 and 112 5 have been combined in a single working element 610 according to FIG. 6. The guide surface 620 and the nose 618 for the device 106 are accordingly corresponding 6 worn in the device 104 or integrated therein.

The profiles 600 are mounted in the frame by means of rotary bearings (see FIG. 5B) and are therefore each rotatable about its own axis of rotation 105, 107, 109 (see FIG. 5A). The arrangement is similar that of Figure 2 in that e.g. axis of rotation 105 between edge 616 of the device 104 and the nose 618 of the device 106 is provided. The axis of rotation 107 is between the edge 616 of the device 106 and the nose 618 of the device 108 intended. When turning a profile 600, the edge attached to it moves 616 and nose 618 in opposite directions what the desired supportive Effects of the two adjustment movements result, however in neighboring Devices. The devices must therefore be coordinated (as in the arrangement according to FIG. 2) become.

A plane EB, which is both the axis of rotation of the needle roller and one of the axes of rotation 105, 107, 109, the corresponding contact surface 620 cuts into two Parts. These parts can be of approximately the same length, which means that one Swiveling movement of a profile 600 same adjustment movements of the corresponding Edge 616 and nose 618 cause, that is, the change in the immersion depth of the Edge 616 corresponds approximately to the change in the working gap width defined by the nose. If one of the two adjustment movements should be larger than the other, the position of the corresponding profile rotation axis can be shifted so that the level EB newly divides the guide surface 620 into unequal parts.

Devices 104, 106, 108 can all share a common lever mechanism Actuator connected, this actuator for manual operation or can be provided for motor actuation. The coordinated setting all devices are therefore guaranteed by the lever mechanism. The same effect could of course be achieved by means of a programmable controller, if the devices are not mechanically connected to each other.

The arrangement can be followed in a so-called VARIO set system Integrate EP-A-452 676. According to such a system, the speed of the needle roller be selected selectively to adjust the intensity of the fiber processing, with a higher intensity a cleaning improvement but also an increased risk of fiber impairment (fiber shortening). The settings of the Working elements 610 can be selectively selected to allow waste disposal influence, a greater immersion depth of the edges K an increased amount of waste with an increased risk of loss of guff fiber.

Upstream of the first separation edge 616 is a baffle (not shown - see but element 116, Fig. 5A) provided to transfer the fibrous material between to ensure the feed roller 321 and the first separating edge. The contact surface upstream of the first separating edge is preferably fixed, but could can be variably set in the same way as the other guiding surfaces. The baffle 620 downstream from the last separating edge 616 is set together with this edge, which does nothing in and of itself, since this guide surface has no other separating edge is followed. However, the variable setting of the last guide surface has no disadvantages with and it enables the uniform design of the devices 104, 106, 108, which of logistics or assembly is advantageous.

I. Durchmesser der Nadelwalze - 290 bis 300 mm

II. Schwenkwinkel jedes Profils - 5° bis 20°

III.Arbeitsspaltbreite an der Nase 618

• Minimum - 1 mm
• Maximum - 4 mm

IV.Arbeitsspaltbreite an der Kante 616

Minimum - 1 mm

Maximum - 4 mm

V. Länge der Leitfläche 620 - 80 bis 90 mm, vorzugsweise ca. 85 mm.

Vl.Breite des Ausscheidespaltes - 7 bis 11 mm, vorzugsweise 8 bis 10 mm.

An embodiment for installation in a cleaning module for a shaft according to FIG. 5 can have the following dimensions, for example:

I. Diameter of the needle roller - 290 to 300 mm

II. Swivel angle of each profile - 5 ° to 20 °

III. Working gap width on the nose 618

• Minimum - 1 mm
• Maximum - 4 mm

IV. Working gap width at edge 616

Minimum - 1 mm

Maximum - 4 mm

V. Length of the guide surface 620 - 80 to 90 mm, preferably about 85 mm.

Vl. Width of the separation gap - 7 to 11 mm, preferably 8 to 10 mm.

It is not absolutely necessary to make the adjustment movements by means of a rotary movement or to perform simultaneously. It would be possible e.g. one engine each for a first part with the edge 616 and for a second part with the nose 618, the Both parts could be rotated or moved linearly to make the adjustment movements to effect. The actuator system could move these two parts simultaneously or one after the other. It is important that the movements are coordinated (e.g. by a suitable control) are to achieve the desired effect.

Second variant of the invention

7 and 8 each show two adjacent grate bar modules M1 of a grate device for one Flake cleaner (fine cleaner) according to EP-A-481 302. The impact circle of a clothing on a rotatable roller is shown in simplified form in FIG. 7 and 8 as a straight line 440. As described in EP-A-481 302, there is 440 between the impact circle and a guide surface 76 on each module M1 including a "clearance angle" α. Between the impact circle 440 and a "guide surface" 74 on each module M1 becomes one "Angle of attack" γ formed. By means of a suitable rust actuator (not shown, see EP-A-481 302), the grate modules M1 can be pivoted together about respective pivot axes 33 e.g. by the clearance angle from the value α1 (FIG. 7) to the value α2 (FIG. 8) increase, or vice versa.

The position of the pivot shaft 33 in the area of the left corner of each grate bar module shown has the consequence that when the grate bar module is pivoted about the axis of rotation the pivot shaft 33, the distance B (i.e., the distance in the radial direction between the leading edge 77 of each module M1 and the trailing edge 75 of the previous one Module) e.g. is expanded from B1 to B2 (see FIG. 8), while on the other hand the distance A2 (between each leading edge 77 and the beating circle 440 in Fig. 8) is not essential is greater than the corresponding distance Al in Fig. 7, i.e. through the adjustment of module M1 is practically unchanged. The distance A1 set once is therefore only negligibly changed by the mentioned swiveling when re-setting the angle α (or γ).

Investigations on rust devices according to FIGS. 7 and 8 now have a previously not recognized Fact brought to light. The pivoting of the "guide surface" 74 from the position 7 in the position of FIG. 8 (reduction of the angle of attack γ) leads to a reduction in the excretion effect (there is less material between the Rust bars removed). This effect was to be expected according to the theory of rust. The corresponding enlargement of the working gap at edge 75, from (A1 + B1) in Fig. 7 on (A2 + B2) in Fig. 8 - what enlargement "automatically" with a reduction of the angle of attack γ occur in an embodiment according to FIGS. 7 and 8 must - but leads to an increase in the excretion effect, i.e. there will be more material removed from the fiber / air stream. In other words, the enlargement of the working gap upstream of the separating edge 77 partially lifts the effect of the reduction of the angle of attack. This fact was not known before.

Principles of the second variant of the invention:

The second variant of the present invention is based on the latter new knowledge and develops it further.

The diagram in Fig. 9A is used to explain the new principles in different Executions of the second variant can be realized. Line Q represents one "Reference surface", which is shown here as a plane for the sake of simplicity, in practice but can have a curvature (lateral surface of a rotatable roller, cf. Just 440 in Figures 7 and 8). The fully drawn AF line represents an excretion area (similar to the guide surface 74 in Figures 7 and 8), where on at its front end (near the reference surface) Edge K. The separating surface carries air deflected by the edge K. the working gap. The solid line LF represents a guide surface. The reference symbol Q1 indicates an imaginary plane that is parallel to the reference surface Q stands and intersects the edge K.

The direction of transport of the fiber / air flow is indicated by the arrow FLS, from where it can be seen that the material flow first flows over the guide surface LF and then strikes the edge K. There is between the contact surface LF and the edge K. a separation gap AS. Part of the current is peeled off by the edge K and derived through the gap AS. The contact surface LF and the separation surface AF are adjustable to influence the excretion effect. Appropriate means of adjustment of these areas will be explained below, but play for the explanation the principles don't matter.

One setting option is to compare the angular position of the separating surface AF to change the reference area Q (Q1) or with respect to the fiber / air flow, e.g. by shifting the area AF into that indicated by the dashed line Digit (corresponds to an increase in the "setting angle" "from ⊘ 1 to ⊘ 2). The position of the edge K remains essentially unchanged. By this rotation of the Area AF reduces the excretion effect - it becomes a thinner layer of air peeled from the material flow and redirected through the gap AS. This can be done 9B are visualized, this figure being presented only for explanation and remains without any restrictive effect. In the extreme position shown in Fig. 9B acts the area AF as a damming element with respect to the fiber / air flow flowing into it in the working gap, as is indicated schematically by the "flow lines" in FIG. 9B. Part of the current is nevertheless deflected and discharged through the gap AS, a, in In comparison to the arrangement according to FIG. 9C, a larger part of the current is around Edge K guided and printed between it and the (not shown) transport roller. In the arrangement according to FIG. 9C, everything remains the same except for the angular position of the Area AF, which in this case corresponds to a very small value for the setting angle ⊘. The edge K now acts as a separating element, which (without substantial jamming) through a larger current section compared to the arrangement according to FIG. 9B removes the gap AS.

Another setting option is to direct the guide surface LF in the direction of the To shift the reference surface Q that the width of the gap FS adjacent to the separation gap AS is reduced. This can e.g. by moving the guide surface into the location indicated by the broken line (Fig. 9A), i.e. without one Changing the angular position of the guide surface LF. The required effect could be but can be achieved by pivoting the guide surface LF around its front edge VK becomes. By reducing the gap width FS, the excretion effect becomes also reduced. By reversing these adjustment movements, the excretion effect of course, vice versa. These effects are (again only schematic and without restricting effect) in Figures 9D and 9E. Fig. Fig. 9D shows the arrangement with a very wide gap FS and Fig. 3E with a very narrow gap, with all other features of the arrangement (especially the angular position the area AF) remain unchanged compared to FIG. 9D.

What is important is the "basic knowledge" that each of these two setting parameters is one Have effect, and that through a suitable link different combinations can be achieved, in particular that the adjustment movements are linked in such a way can be that the respective effects of the elements involved reinforce or support each other. This knowledge can also be based on that of the "VARIOset" principles introduced by the applicant company (cf. EP-A-452 676) or be tightened. The adjustment of the separation surface (s) or the guide elements can be used (as shown) to influence the amount of waste. The Rotation speed of the roller can be changed to match the intensity of the fiber processing to increase or decrease. These two effects can be mutual coordinated with regard to the processing of a certain fiber material or be optimized. This coordination / optimization is favored by the fact that the effect of adjusting the excretion area by adjusting the guide element is supported (and not partially canceled).

The setting angle  can advantageously be between 20 ° and 40 °, preferably between 25 ° and 35 ° adjustable. The distance FS can advantageously be between 0.5 mm and 10 mm, preferably be adjustable between 1 and 5 mm, with "reference surface" Q for the determination of the distance FS of the impact circle (the lateral surface) of the Transport roller worn set applies.

Exemplary embodiments of the second variant:

Based on FIGS. 10 and 11, exemplary embodiments for realizing the The principles according to FIG. 9 are explained in a module according to FIGS. 5A and 5B.

10A shows the feed roller 321, the guide rod 116 and the first separating device 104 with its guide element 112, separating element 110 and separating gap 114, and the impact circle 440 (the outer surface) of the roller 33. The two elements 110, 112 are fixedly attached to the housing 117 of the discharge duct, or from a Pieces formed (e.g. as parts of a continuous casting profile).

At each end (Fig. 10B) the housing 117 is provided with an extension piece 118, which is received in a respective pivot bearing 119. The pivot bearing 119 are mounted in the side walls (not shown) of the machine about an axis of rotation DA (see also FIG. 10A) for the excretion device 104. The (in Fig. 10B) left extension piece 118 is connected to an adjusting lever 120, which is manual or by means of a controlled actuator system (indicated schematically by the box Ak) can be operated to perform an adjustment.

When housing 117 is rotated clockwise (as shown in Fig. 10A), move the elements 110, 112, e.g. from those indicated with solid lines Positions in the positions indicated by dashed lines. The changes can be seen more clearly from the detailed sketch in FIG. 10C, where the designations AF, LF (see FIG. 9) used again for the aforementioned separating and guiding surfaces were.

If an imaginary level E104 is now defined, this level being both the Edge K of element 110 and also axis of rotation 170 of roller 33 (FIG. 5A) intersects, the angle K⊘ in Fig. 10C corresponds to that with meaningful accuracy "Complementary angle" of the setting angle ⊘ in Fig. 9, wherein ⊘ + K⊘ = 90 °. 10C that the angle K⊘ between the surface AF and level E104 by moving the element from position SA1 (Fig. 10C, indicated by solid lines) to the position SA2 (dashed) of K⊘1 is reduced to K⊘2, i.e. the setting angle ⊘ is increased accordingly. As has already been explained with reference to FIG. 9, such a change leads to a downsizing the excretion effect.

At the same time, element 112 is moved out of position SL1 (FIG. 10C) with fully extended Lines indicated) shifted to position SL2 (dashed). This will make the Working gap between the contact surface LF and the impact circle 440 narrowed, which also results in a reduced excretion effect. The effect of adjusting the element 112 thus supports or reinforces the effect of adjusting the element 110. Since a smaller adjustment movement (compared to the arrangement according to the figures 7 and 8) has a greater effect on material excretion, the machine can can be adjusted more precisely. Because the two elements 110, 112 by a single one First of all, the solution shown is very much adjustable inexpensive and secondly always able to achieve reproducible results. However, the second variant of the invention is not restricted to this embodiment, as will be explained in more detail below with reference to FIG. 11.

10C that the location of the axis of rotation DA in the suction chamber inevitable a small shift of the edge K when adjusting the element 110 results in a shift which corresponds to the effect of the change in Setting angle ⊘ (Fig. 9) counteracts. The shift of the edge K is such small that their effect can be neglected. This can ensure this that the axis of rotation 170 of the roller, the edge K and the axis of rotation DA in (or in the vicinity) of a single plane, which also applies to the arrangement according to FIG. 5 applies (see level E above).

11 shows two shuttering segments 200, 202 for a roller 204 of an opening and cleaning machine in the blow room or carding machine, e.g. a fine cleaner or Runaway. The reference symbol AS again indicates an elimination gap. The reference symbol F1 indicates a first wing, which is the guide surface LF for this Variant. The wing F is rotatable on the segment 200 about an axis of rotation 206 mounted.

The reference symbol F2 indicates a second wing which has the edge K. Of the Wing F2 is mounted on segment 202 so as to be rotatable about an axis of rotation 208 this axis 208 practically coincides with the edge K. The two axes of rotation 206, 208 can be connected to a common actuator system (schematically Ak), whereby the transmission of motion from the actuator system Ak to the axes of rotation 206, 208 ′ in such a way can be designed that a movement of a motor in the actuator Ak in different Movements of the wings F1, F2 (according to Fig. 11) is translated.

However, there could be one actuator system (Ak1, Ak2, not shown) for the two axes of rotation 206, 208 (wings F1, F2) can be provided, which is an extremely flexible (but rather complex) Execution results. Of course, the axes of rotation 206, 208 can take place manually be moved by motor.

Fig. 12 shows a further cleaning module, both according to the present one as was designed according to the previous invention (EP-A-848 091). This figure shows (as FIG. 5A) a feed roller 321 only partially shown followed (in the Direction of transport) by a traverse 116, and the impact circle 440 of a transport or opening roller (not specifically indicated). Follow after traverse 116 three dirt separating devices 304, 306, 308, the device 304 only partially depicted is. Since these devices are essentially identical, a description is used of the device 306 also for the other two. Each device includes one tubular housing 317, a separating element 310, and a nose 312, wherein a Separation gap 314 is present between the nose 312 and the element 310. The Nose 312 and element 310 are either attached to housing 317 or so formed from one piece, and the whole is rotatably mounted about an axis of rotation DA (not shown, see Fig. 10B). The element 310 is provided with an edge K and carries also an axis of rotation 305 for a guide wing 307, which is similar to wing F1 (FIG. 11) is formed. The wing 307 partially covers an air intake duct 309 between the Nose 312 and the separating element of the preceding one (in the flow direction) Device. Channel 309 is connected to the "environment" of the machine for air to escape to be able to insert it into the working or transport gap. It is a similar one Channel 309A between the cross member 116 and the first device 304 and another Channel 309B is provided downstream of the last device 308.

The vanes 307 direct the air flows from the channels 309, 309B into each of the Direction of transport around. The wing 307 of the device 304 mainly serves as Guide element for the device 306, and the wing 307 of the device 306 serves as a guide element for the device 308. Since the latter function already with reference to FIG. 11 (for the Wing F1) has been explained, repetition is omitted here. It will but noted that in the variant according to FIG. 12 the setting angle of the separating element 310 by rotating the housing 317 about the axis of rotation DA, during the distance between the free end of wing 307 and the stroke circle 440 can be adjusted separately by rotating the wing about the axis of rotation 305 got to. The setting angle ⊘ (see FIG. 9A) is in this case between an imaginary Extension of the separation surface of element 310 and a tangent on Impact circle 440 is shown where the impact circle is cut through the aforementioned extension becomes.

The guide rod (traverse) 116, which are provided in front of the first device 304 must not be provided with a Leifflügel, since this rod itself as a guide for the first device 304 is used. The angular position of the guide rod can be adjusted accordingly to get voted. The feed roller 321 or the feed trough assigned to the roller (not shown) may be movably supported to interpose itself to adjust the clamped amount of fiber.

The preferred embodiment of the second variant (FIG. 13) comprises for each separation device 104, 106, 108 (see FIG. 5) a profile 500 with a cavity 502, which the Suction channel forms. The profiles can each be rotated about their own longitudinal axis 105, 107, 109 (see Fig. 5A). The profile 500 of the device 108 has a longitudinal slot 504, which opens into the cavity 502 and forms the discharge slot 114 (see FIG. 5). On one side of the slot 504 there is a pedestal 506, on which one Shoe 508 is fastened by means of screws 510. The shoe 508 is one against Direction of rotation of the roller 33 provided facing attachment 512, of which the front end forms a separating edge. The shoe 508 with its attachment 512 together with the separating edge forms the separating element 110 (cf. FIG. 5) with a separating surface 513. The others Profiles 500 are identically formed and each provided with a shoe, the reference numerals have been omitted for clarity of presentation improve.

On the other side of the slot 504 there is a longitudinal part 514 with one against the surface 516 facing the transport roller. The part 514 forms the guide element 112 (see FIG. 5A) and the surface 516 forms the contact surface for the one moving with the roller 33 Fiber / air flow.

The three devices in Fig. 13 are shown in three different settings, which is usually will not occur but is useful for illustration. The device 106 is located in a medium (basic) setting, in which the separating edge is in one plane (the "base plane") GB, which is also the axis of rotation 107 of the device 106 and includes the axis of rotation 170 of the roller 33 (see FIG. 5A). The device 104 is located in such a setting that the separating edge of this device against the direction of rotation P of the roller 33 has been shifted beyond the plane GE (“forwards”), which corresponds to a reduction in the angle ⊘ (Fig. 9). This results in a relative high excretion effect compared to the basic position shown in device 106.

The device 108, however, is in such a setting that the connection level (which connects the axis of rotation 109 with the separating edge) "behind" the Base plane GE (viewed in the direction of rotation P) is withdrawn. This matches with an enlargement of the above-mentioned angle ⊘, which reduces the excretion effect (compared to the basic position).

Fig. 13 now shows that the change shown in the angular position of the separation surface 513 by pivoting the profile through the angles β on both sides of the basic position can be achieved, with the working gap between the separating edge and the roller 33, not shown, hardly changes.

Claims (19)

A dirt separator to attach to a fluid flowing in a working gap Fiber / air flow with a dirt drainage channel, a separating element, that is adjustable by the portion of the deflected by the element Adjust fiber / air flow, and a guide element that is adjustable to the adjust the working gap width assigned to it, characterized in that Adjustment movements of the separating element from predetermined movements of the guiding element are accompanied. A device according to claim 1, characterized in that the separating element is adjustable to adjust the depth of immersion in the fiber / air stream. A device according to claim 1 or claim 2, characterized in that the Separation element can be set in selectively selectable angular positions can. A device according to one of claims 1 to 3, characterized in that the Ausscheidelement and the guide element carried by a common carrier become. A device according to claim 3 and 4, characterized in that the carrier is rotatable is mounted around a predetermined axis. A device according to one of claims 1 to 5, characterized in that the Device is provided in a fiber cleaning unit, the several Dirt separating devices, wherein the separating element one Device and the control element are assigned to another device. A device according to claim 6, characterized in that adjusting means are provided are coordinated, can set the devices in the same sense. A fiber processing machine, characterized in that the machine a rotatable roller (30), with a fiber / air flow (FLS) in a working nip (10) between the circumference (31) of the roller (30) and one surrounding it Formwork can flow, and that the machine with at least one device is provided according to claims 1 to 7. A machine according to claim 8, characterized in that an air intake is provided upstream and / or downstream of the device. A dirt separator (104,106,108; 304,306,308) for separating Dirt from a fiber-air stream with a separating element (110; 310), one separating gap (114; 314) upstream of the element and one of the gap associated discharge (117; 317), characterized in that the angular position of the element (110; 310) is adjustable with respect to the current. A device according to claim 10, characterized in that the separating element (110; 310) a guide element (112; 307) is connected upstream. A device according to claim 10 or 11, characterized in that the separating element has an area (AF) in selectively selectable angular positions can be adjusted against the current. A device according to one of claims 10 to 12, characterized in that the Guide element is adjustable in directions transverse to the flow direction. A device according to one of claims 10 to 13, characterized in that the Ausscheidelement and the guide element carried by a common carrier become. A device according to claim 14, characterized in that the carrier is rotatable is mounted around a predetermined axis. A device according to one of claims 10 to 15, characterized in that a change in the angular position of the surface with a movement of the guide element is linked across the stream. A fiber processing machine, characterized in that the machine a rotatable roller (30), with a fiber / air flow (FLS) in a working nip (10) between the circumference (31) of the roller (30) and one surrounding it Formwork can flow, and that the machine with at least one device is provided according to claims 10 to 16. A machine according to claim 15 and claim 17, characterized in that the axis of rotation of the roller, the axis of rotation of the carrier and the front end of the Element lie in or at least in the vicinity of a common plane (E). A machine according to claim 17 or 18, characterized in that several Devices are distributed along the circumference of the roller.

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