EP0419415A1 - Procédé et appareil pour le nettoyage fin des fibres textiles - Google Patents

Procédé et appareil pour le nettoyage fin des fibres textiles Download PDF

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Publication number
EP0419415A1
EP0419415A1 EP90810706A EP90810706A EP0419415A1 EP 0419415 A1 EP0419415 A1 EP 0419415A1 EP 90810706 A EP90810706 A EP 90810706A EP 90810706 A EP90810706 A EP 90810706A EP 0419415 A1 EP0419415 A1 EP 0419415A1
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EP
European Patent Office
Prior art keywords
opening roller
cotton
cleaning
fiber
fibers
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Granted
Application number
EP90810706A
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German (de)
English (en)
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EP0419415B1 (fr
Inventor
Heinz Schelb
Paul Staeheli
Ulf Schneider
Jürg Faas
Robert Demuth
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Priority claimed from CH281290A external-priority patent/CH682495A5/de
Priority claimed from CH298090A external-priority patent/CH683529A5/de
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0419415A1 publication Critical patent/EP0419415A1/fr
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G9/00—Opening or cleaning fibres, e.g. scutching cotton
    • D01G9/14—Details of machines or apparatus
    • D01G9/20—Framework; Casings; Coverings; Grids
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G9/00—Opening or cleaning fibres, e.g. scutching cotton
    • D01G9/14—Details of machines or apparatus

Definitions

  • the invention lies in the field of spinning machines, it relates to the fine cleaning of textile fibers and relates to a method and a device for carrying out the method according to the preambles of the independent claims.
  • Textile fibers in particular cotton fibers, are subjected to a rough cleaning after opening the bales, during which the rough impurities are removed. Subsequent to the rough cleaning, the fine cleaning is carried out, during which, if possible, all the dirt particles remaining in the fibers after the rough cleaning are to be removed.
  • the fibers only go to the next preparation stage for spinning, e.g. B. for carding.
  • the fine cleaning must be set up in such a way that it contains all the dirt particles contained in it from fibers of every provenance removes, but without affecting the quality of the fibers and without separating larger portions of the fibers together with the dirt.
  • Fiber length The fiber length should not be influenced during cleaning.
  • Fiber strength The fiber strength is not affected during cleaning. The higher the fiber strength, the more aggressive cleaning can be done without the fibers being damaged.
  • Fiber parallelism The more parallel the individual fibers lie to each other, the more uniform the voids between the fibers and the easier the fibers can be separated.
  • Pollution degree Pollution particles lie between the fibers. The degree of contamination is determined by the number and type of the contamination particles.
  • the pollution particles can be large or small compared to the size of the cavities in the flakes, they can be heavy or light compared to the weight of the fibers and they can be trapped in the cavities of the flakes, adhering to the fibers or loosely the flakes or fibers are mixed.
  • the setting options for the machine parameters relevant to the cleaning process must be large, and the change from a fiber provenance to others must be able to be carried out quickly and with little effort, possibly even during the process.
  • the cleaning parameters must be adjustable from the outside without manual intervention in the machine. Inlet into the fine cleaning machine and extraction of cleaned fibers and dirt must be set up so that they do not interfere with the cleaning process at any time.
  • FIG. 1 shows the diagram of the fine cleaning method according to the invention with the individual method stages and arranged below them schematic sectional images of those parts of the fine cleaning device in which the method stages take place.
  • the fibers go through all cleaning stages.
  • the fiber flow is indicated by shaded arrows.
  • a cleaning process takes place in each stage. It either consists of detaching fibers from fibers and fibers from dirt particles or effectively separating dirt particles from the fibers.
  • cleaning stages are either dissolution stages (dissolving the tangle) from which no pollution particles are removed, or separation stages from which different pollution particles are removed depending on the separation process (indicated in the diagram by double, unshaded arrows).
  • the fiber stream passes through at least one rearrangement stage between cleaning stages, that is to say a stage in which the fibers are detached from the transport teeth of the opening roller, rearranged and again picked up by the transport teeth.
  • a rearrangement stage can also be a separation stage.
  • cleaning is determined by a number of cleaning parameters p x , which are indicated by simple arrows in the process diagram and in the schematic drawings of the process steps.
  • each cleaning parameter p x is due on the one hand to the characteristics of the fiber proven being processed and on the other hand to the setting of a number of other cleaning parameters p x in the other cleaning stages involved.
  • Optimal cleaning of the fibers of a certain provenance or a provenance mixture is achieved by a set of cleaning parameters p x that corresponds exactly to this provenance or provenance mixture.
  • the cleaning parameters p x are set according to the characteristics of the fiber provenance. This roughly orientating, initial setting is finely optimized during the start-up period in accordance with the properties of the fiber and dirt components arising from the machine during this period by means of a regulating readjustment.
  • the initial setting according to fiber provenance and the optimization that follows immediately bring the start-up loss (not optimally cleaned fiber portion from the start-up phase) to a minimum.
  • the fine cleaning process can only work optimally if it is not exposed to aerodynamic disturbances. It is therefore particularly advantageous if a process is used to eject the contaminants from the fine cleaning machine, in which the extraction of the contaminants is separated from the cleaning room in such a way that no incorrect air can disrupt the cleaning.
  • Cleaning stage 1 (sieving and compression, separation stage) :
  • Flakes from the coarse cleaning machine are usually fed into the fine cleaning machine.
  • cleaning stage 1 which is also the inlet to the machine, they are sucked onto a sieve with an air stream. Especially small, loose dirt particles pass through the sieve with the air, while the fibers are held back by the sieve and compressed into a cotton wool, which is a loose connection of individual flakes. The cotton wool moves continuously from the inlet to the next cleaning stage.
  • the cleaning parameters of the inlet are: p1 amount of fibers fed p2 air flow through the separating element
  • the amount of fibers fed p1 determines the performance of the fine cleaning machine. All following p1 cleaning parameters should be set so that at a maximum of fibers fed optimal cleaning is possible. The highest possible amount of fibers fed p1 is determined, among other things, by the degree of contamination of the fibers, by the production specification and by the fiber impairment.
  • the air throughput through the separating element p2 determines the compactness of the cotton wool produced on the screen. This compactness affects the strain on the fibers when plucking in the following cleaning stage 2, since the fibers hold more together in a more compact wadding and thus the warping process is opposed to a higher resistance. At the same time, the air flow through the separating element p2 determines the performance and the effect of cleaning on the sieve. The air throughput through the separating element p2 should not exceed the value at which fibers begin to be torn through the sieve with the dirt particles.
  • the cotton wool emerging from cleaning stage 1 is passed through a converging gap, at the end (clamping point) of which it is clamped. After this clamping, at the so-called take-over point, it is gripped by the teeth of the central opening roller. Since the teeth of the opening roller have a higher speed than the cotton wool fed in, the teeth are pulled apart or warped when they are taken over by the teeth. This plucking process increases the resolution of the cotton wool and partially parallelizes the fibers. Loose, adhering and trapped dirt particles are loosened by the movement of the fibers against each other and partly to the surface of the pre-warped Cotton transported. The pre-drawn cotton is guided to cleaning stage 3 on the teeth of the opening roller.
  • the cleaning parameters of this cleaning level are: p3 speed of the opening roller p4 Distance between terminal point and transfer point p12 clamping force
  • the speed of the central opening roller p3 is the most influential cleaning parameter. It has a determining influence on cleaning levels 2 to 6. When the cotton is taken over by the teeth of the opening roller (cleaning level 2), it determines the thickness of the pre-drawn cotton together with the quantity p 1 fed in. In the subsequent cleaning stages, it determines the centrifugal force that is used as a cleaning force. The greater the speed of the opening roller, the thinner the pre-drawn cotton and the easier it can be cleaned in the following cleaning stages. However, this has its limits due to the fiber impairment when the peripheral speed of the opening roller is too high.
  • the distance between the clamping point and the takeover point p4 and the clamping force p12 determine how much the fibers dissolve during the takeover, and are also subjected to tensile stress and thereby impaired. If the transfer point and the clamping point are too close to one another (or if the distance between the transfer point and the clamping point p4 is smaller than the average length of the pile), too much of the fiber must be pulled through the clamping point when plucking the cotton. Is the clamping force p12 high, the fibers are more parallelized and sticky when plucking Contamination particles are better removed from the fibers, but the tensile load on the fibers is correspondingly high.
  • the distance between the clamping point and the takeover point p4 and the clamping force p12 should therefore be set depending on the length of the stack and depending on the strength of the fibers to be cleaned, so that the resolution of the fibers is as high as possible, but the fibers are subjected to stress with possibly little impairment survive the quality.
  • the teeth of the opening roller guide the pre-drawn cotton to and through the cleaning stage 3. It is centrifuged, that is, it is expanded radially and, above all, large, heavy dirt particles are moved radially outwards. During this centrifuging or spinning process, the cotton is deflected inwards against the centrifugal force or centrifugal force by means which restrict its radial expansion (guide elements). This deflection causes an additional accumulation of dirt particles in the outer surface layer of the cotton wool.
  • a stretch follows this stretch of line with radial limitation Section without radial limitation, on which loose dirt particles can move away from the cotton surface, trapped and adhering particles can move beyond the cotton surface. This is followed by a separating blade in the direction of transport, under which the wadding is carried out in such a way that its outermost layer, most enriched with dirt particles, is separated.
  • the cleaning parameters of this cleaning level are: p5 amount of deflection towards the inside (radial position of the guide elements) p6 length of the section without radial restriction (distance between one guide element and the following separating blade) p7 Radial position of the cutting blade
  • the strength of the deflection towards the inside p5 determines how much (in addition to the effect of the centrifugal force) dirt particles accumulate in the outer surface of the cotton wool, but at the same time it also determines how strongly the cotton wool is compressed radially. Since the dirt particles can be removed less easily from a more compressed cotton wool, the deflection towards the inside can only be strong if, at the same time, a long section without radial limitation p6 (see below) ensures that the cotton wool is separated from the separation blade before it is separated Has enough time to expand radially again. p5 can be selected the higher, the thinner the cotton emerging from cleaning stage 2.
  • the length of the route section without radial limitation p Begrenz determines how much the cotton wool and the dirt particles are separated radially. For the following effective separation on the separating blade, it is advantageous if the previous separation is as large as possible. However, since trapped and adhering dirt particles tear fibers out of the flake with a large separation, an excessive separation must be avoided.
  • An optimal setting of the length of the second section of the route means that loose dirt particles separate completely from the flake, while adhering and trapped particles are only driven straight over the surface of the flake. This optimal setting primarily depends on the thickness and compression of the cotton. The thinner and less compressed the cotton is, the shorter the route section should be.
  • the radial position of the separating blade p7 determines where to separate between the cotton wool and the amount of dirt. With an optimal setting, the separating blade will move precisely over the cotton wool surface, thus separating the already free dirt particles purely spatially and the dirt particles adhering to the flake surface by mechanical action. If the blade position is too high, too little dirt particles are removed, if it is too deep, too many fibers are torn from the flake and removed with the dirt particles.
  • the optimal setting of the radial position of the separating blade depends on the cotton wool carried out under the blade, so it must above all be precisely matched to the two other cleaning parameters p5 and p6 of this cleaning level.
  • the pre-drawn and centrifuged cotton is pulled through the teeth of the opening roller under a carding plate.
  • the fibers are essentially parallelized and rubbed against each other at the same time. Trapped dirt particles are released by the parallelization, adhering dirt particles are detached from the fibers by rubbing. The flakes and the dirt particles are taken to the next cleaning stage.
  • Carding stage cleaning parameters are: p8 The depth of penetration of the card clothing (e.g. needles or teeth) into the fiber layer p9 gradient of the carding intensity
  • the depth of penetration of the card clothing p8 must first and foremost correspond to the thickness of the cotton fed into the carding stage, that is, it depends primarily on the cleaning parameters p3, p5, p6 and p7 of cleaning level 3.
  • the depth of penetration of the card clothing p bestimmt in determines the cotton the achievable degree of parallelization and thus the degree of separation between fibers and dirt particles. The deeper the clothing penetrates, the higher the degree of parallelization and cleaning, but also the higher the stress on the fibers.
  • the optimal setting of the parameter p8 thus also depends on the characteristics of the fiber provenance, on the speed of the opening roller p3 and on the parallelism of the fibers achieved up to that point.
  • the degree of parallelization and opening that can be achieved at this stage can be improved if the depth of penetration of the card clothing is increased as the card progresses.
  • the intensity of the carding p9 is thus continuously increased so that the carding with increasing degree of parallelization is always carried out with the maximum permissible stress on the fibers.
  • the optimal setting of the gradient of the carding intensity depends on the same parameters as the setting of the depth of penetration of the card clothing p8.
  • the fiber wadding is taken over by the teeth of the opening roller, it is moved through the individual cleaning stages as described by the movement of these teeth.
  • the degree of parallelism and the degree of soiling of the fiber material change, as previously described, especially in the zones of the cotton wool that are further away from the opening roller and between the teeth. Close to the surface of the opening roller and where the teeth carry the fiber material changes less, because the fibers are pressed against the teeth by the pull. It can now be seen that the cleaning effect of the cleaning process is improved if a rearrangement step is carried out at a point between other cleaning steps, in which the arrangement of the fibers is changed in particular in relation to the teeth that transport them.
  • Cleaning parameters of the relocation level are: p13 aerodynamic force against the opening roller, p14 aerodynamic force away from the opening roller P15 braking effect.
  • the three cleaning parameters p13, p14 and p15 must be matched to one another such that the improvement in the cleaning effect of the cleaning stages following the rearrangement stage is highly possible, but that the parallelization of the fibers achieved up to that point is only lost to a tolerable extent by the rearrangement.
  • Cleaning level 6 corresponds exactly to cleaning level 3 in its cleaning function and in its cleaning parameters.
  • the cleaning parameters in this cleaning level should be set so that the cleaning is slightly more aggressive than in cleaning level 3, because it is important to separate the heavy dirt particles, also at the risk of fibers being entrained. Heavy dirt particles that are not separated in this cleaning stage will leave the fine cleaning with the cleaned fibers.
  • Cleaning stage 7 (sieving, separation stage): In the cleaning stage 7, the cotton is passed past another separation device, by means of which fiber dust, which may have formed through the fiber processing, is removed.
  • the separating device can consist of a grate, a sieve or a slotted plate, which is advantageously subjected to vibration with a small amplitude. This deflection from the rest position can be generated positively or can result from the air flow as a membrane vibration.
  • the fiber material is briefly sucked onto a sieve, from which it is held back, while small, loose dirt particles in particular can pass through the sieve.
  • the vibrating pad causes the fiber layer to be loosened and transported in the conveying direction before the fibers are briefly sucked in again. In this way, the long fibers are separated from dust and possible fiber fragments.
  • Cleaning parameters of this cleaning level are: P10 air flow through the separating element, P11 vibration (amplitude and frequency)
  • the air throughput through the separating element is optimally adjusted if as much dust and dirt as possible but as few fibers as possible are extracted.
  • the conveying effect due to the "membrane vibration" is usually sufficient, so that in most cases no forced vibration is necessary. If such a device is present, however, it is operated with the parameter values p 1, which are set so that the conveyance of the fiber material along the exit shaft is sufficient.
  • Fig. 2 shows an embodiment of the device for the cleaning stage 1.
  • the inlet consists of a channel 21 through which outside air and fed-in flakes are sucked in.
  • the material flow W is supported by the rotation of a blind drum 22 and the rotation of a sieve drum 23.
  • the air is sucked out through the sieve drum 23.
  • the cotton wool forming on the sieve drum 23 moves with the sieve surface and is fed from there to the cleaning stage 2.
  • the speed of the air flow p2 is set via the power of the suction.
  • Variants of the embodiment described above are: - The inlet does not contain a blind drum 22. - The function of the screen drum 23 is taken over by a stationary screen. - The air is extracted only through a limited sector of the sieve drum 23. - Air is blown against the cotton wool through the sieve drum sector, from which the cotton wool is detached, in order to facilitate detachment.
  • Fig. 3.1 shows an embodiment of the device for cleaning stage 2, namely a variant with adjustable distance between the clamping point and transfer point p4, but not adjustable clamping force.
  • the cotton wool W detaching from the sieve drum 23 of the inlet is guided by a take-off roller 31 and then by a feed roller 32 into the converging gap between the feed roller 32 and a feed trough 34.
  • the point between the feed roller 32 and the outlet edge 33 of the feed trough 34, ie the narrowest point of the clamping gap is called the clamping point.
  • the toothed feed roller 32 conveys the cotton through the nip and through the nip to the takeover point on the opening roller 24 (also called opening roller or opening roller), ie up to where the cotton is gripped by the teeth 24.1 of the opening roller 24, and in the form of a pre-drawn cotton wool is transported further.
  • the direction of rotation of the feed roller 32 and the opening roller 24 are such that the cotton wool does not have to change its direction when it is taken over by the opening roller 24, which is called synchronous feeding (if the direction of rotation of the opening roller 24 were to take place in the other direction, the feed device from would remain the same speak a counter-current feed).
  • the feed trough 34 can be moved relative to the feed roller 32 in such a way that it can be pivoted in a guide about the axis of rotation of the feed roller 32 when the feed roller 32 is in its normal working position or when the rest position is set to the feed trough.
  • This guide is explained in more detail with Fig. 3.2 described later.
  • the distance between the terminal point and the takeover point p4 becomes a variable machine parameter that can be set from the outside.
  • the feed roller 32 is in turn pivotable about the axis of rotation of the opening roller 24, which in turn is stationary. As a result, the distance between the feed roller 32 and the feed trough 34, that is to say the clamping gap including the clamping point, can be changed.
  • This pivotability is supported on a compression spring 35 between a pivot arm 36 and a pivot lever 37, on which the feed roller 32 can be deflected from its working position, so that the clamping gap against the spring force can be widened compared to its minimum width.
  • This widening of the clamping gap by deflecting the feed roller 32 serves on the one hand for the initial insertion of the cotton wool, in order to be able to widen the gap between the feed roller 32 and the food trough 34, and on the other hand to prevent a change in thickness in the cotton wool this is torn off the opening roller by a sudden increase in the clamping force in the nip.
  • the clamping force is determined by the spring constant of the spring 35.
  • the removal roller 31 is absent (especially in combination with the variant of the inlet in which the cotton is blown away from the sieve drum on a sector of the sieve drum 23), - Instead of the sprung pivotability of the feed roller 32, a spring-loaded, adjustable connection between the feed roller 32 and the feed trough 34 is provided (described later with FIG. 3.3).
  • Fig. 3.2 shows an embodiment of the device for cleaning stage 2 with adjustable distance between the clamping point and takeover point p4 and adjustable clamping force p12.
  • a spring housing 100 which serves to receive a compression spring 101, is fastened to a pivot lever 37 which is pivotally attached to the pivot arm 36.
  • a pressure piston 102 which presses against the compression spring 101 and which is fastened to the free end of the piston rod 103, projects into the spring housing 100.
  • the piston rod 103 is part of a pressure cylinder 104, which in turn is pivotally attached to a stationary support 106 by means of a pivot pin 105.
  • the pressure cylinder 104 is supplied with pressure via a pressure control valve 109 and a pressure line 107, which pressure is emitted from a pressure medium source 110.
  • the pressure control valve 109 can be set to a desired pressure in the pressure line 107 by means of a pressure setting element 111 (symbolically represented by an arrow), which can be read off by means of a pressure gauge 108 connected to this line.
  • the pressure setting element 111 can either be a manually operated rotary knob or the pressure control valve 109 can be designed in such a way that the pressure setting element 111 can be remotely controlled (not shown) and, if appropriate, automatically set by a control system (not shown).
  • the compression spring 101 can be biased to a greater or lesser extent, so that the clamping force p 1 2 acting on the fiber wadding W at the narrowest point between the feed trough 34 and the feed roller 32 (nip) is matched to the properties of the fibers to be cleaned , can be set.
  • the pivoting of the feed trough 34 mentioned in connection with FIG. 3.1 is shown at least schematically in the variant shown in FIG. 3.2 with the aid of the guide track 112 and the guide bolts 113 and 114, in that the guide bolts 113 and 114 are embedded in a stationary housing part 116, so that the feed trough 34 can be pivoted about the axis of rotation of the feed roller in the context of the guide track 112 and the position of the guide bolts 113 and 114 according to the arrow directions 117.
  • a fixing screw 115 is inserted in the guide pin 114, which presses on the feed trough 34.
  • the stationary housing part 116 is, as indicated by the dashed lines, inserted in a recess (groove) of the feed trough 34 such that the feed trough 34 is guided in both directions in the direction perpendicular to the paper plane of the figure.
  • the feed trough 34 is moved manually, but a possibility can also be provided to move it remotely (not shown).
  • FIG. 3.3 shows a variant of FIG. 3.2 according to the invention in that a trough plate 120 (also called a trough) is pivotably mounted on a support 122 by means of a pivot pin 121.
  • the carrier 122 is guided by means of a guide track 123 and guide bolts 124 and 125 such that the carrier 122 together with the trough plate 120 can be pivoted about the axis of rotation of the feed roller 32 in accordance with the arrow directions 139.
  • the guide bolts 124 and 125 are embedded in a support 127, which is also a guide for the carrier 122 in the direction perpendicular to the paper plane of the figure. It should be noted that there is an upper and lower support (seen with a view of FIG.
  • Both supports 122 each rest on the corresponding surface of the support 127, so that the support 122 together with the trough plate 120 is guided in both directions in the direction perpendicular to the plane of the paper.
  • the carrier 122 can be fixed by means of a fixing screw 126 which is embedded in the support 127.
  • the support 127 is an integral part of a stationary machine part 128.
  • a pressure cylinder 129 is attached to each carrier 122, the piston rod 130 of which is provided with a pressure piston 131, which presses on a compression spring 132, which in turn is guided in a spring housing 133, which in turn is attached to the trough plate 120.
  • the pressure cylinder 129 is via a pressure control valve 136 and a pressure line 134 charged with pressure so that the pressure piston 131 can compress the spring 132.
  • the desired pressure is set in an analogous manner, as described for the valve 109 of FIG. 3.2, by means of a pressure setting element 137 to a pressure which can be read off by means of the pressure gauge 135.
  • the pressure control valve 136 is fed by a pressure medium source 138.
  • the axis of rotation of the feed roller 32 is arranged stationary in the machine housing.
  • the width of the clamping gap is set here by pivoting the trough plate 120 around the pivot pin 121.
  • the adjustability achieved is the same in both cases.
  • the advantage of the variant according to FIG. 3.3 is that only one element, namely the trough plate 120, has to be pivoted in a double sense and the drive shaft of the feed roller 32 can be stored in stationary bearings.
  • 4.1 shows an embodiment of the device for cleaning stages 3 and 6 with all its components. It is an embodiment with two separating blades and three guide elements.
  • the fiber wadding to be cleaned is moved in the direction of the bold arrows through the cleaning stage.
  • the wadding that was exposed to the centrifugal force before this cleaning stage and in which it is the dirt particles have concentrated in the outer zone, first carried out under a guide element 410.1.
  • the guide element protrudes into the transport path and deflects the cotton towards the inside, that is, against the centrifugal force, and thereby reinforces the radial separation of the cotton into dirt and fibers.
  • a separating blade 49.1 follows the guide element in the transport direction of the fibers.
  • the cotton wool is passed under this separating blade and thereby separated into a fiber and a dirt fraction.
  • the separating blade 49.1 is followed in the transport direction by a second guide element 410.2, a second separating blade 49.2 and then a third guide element 410.3.
  • the following sizes can be set so that the group of guide elements and separating blades for fibers of different provenances or provenance mixtures can be set: - The distance p7 between the separating blades 49.1 and 49.2 and the impact circle S, - The distance p5 between the guide elements 410.1, 410.2 and 410.3 and the impact circle S, - The distance p6 each between a guide element 410.1 and. 410.2 and a separating blade 49.1 respectively. 49.2.
  • 4.1 also shows three levers 42, 44 and 46, by means of which the three distances can be set by means of a motor drive. If the lever 42 is moved around a pivot point B, as shown in dash-dotted lines in the diagram, the entire device moves away from the impact circle, that is to say p7 and p5 become equally large ser. The drawn position of the lever 42 and the separating blades 49.1 and 49.2 is the position closest to the impact circle.
  • the guide elements 410.1, 410.2 and 410.3 move away from the impact circle, while the separating blades 49.1 and 49.2 maintain their position, that is to say p5 becomes larger, while p7 remains the same.
  • the drawn position of the lever 44 and the guide elements 410.1, 410.2 and 410.3 is the position closest to the impact circle relative to the separating blades.
  • Design variants for the exemplary embodiment of the device according to the invention can consist in that the first guide element 410.1 is missing, - Behind the third guide element 410.3 there follows a third separating blade, that is to say that the separating device consists of three pairs of one guide element and one separating blade each - The entire cleaning stage consists of more than three pairs of a separating blade and a guide element.
  • 4.2 shows the device for cleaning stages 3 and 6 from a viewing direction perpendicular to the axis of rotation of the opening roller 24. From this it can be seen how the device according to the invention is arranged on the end face of the opening roller.
  • the end face of the opening roller is covered by a shield 411.
  • the lever mechanism required for actuating the setting of guide elements and separating blades which will be described in more detail with reference to the following figures, is attached to the side of the shield 411 facing away from the opening roller.
  • the separating blades 49.1 and 49.2 and the guide elements 410.1, 410.2 and 410.3 extend parallel to the axis of the opening roller 24 over their entire length. Neither separating blades nor guide elements are visible in Figure 4.2. However, the three pairs of bolts L1 / M1, L2 / M2 and L3 / M3 are visible, which establish the connection between the lever mechanism and the guide elements 410.1, 410.2 and 410.3. Also visible are the two pairs of bolts J1 / K1 and J2 / K2, which connect the lever mechanism with the separating blades 49.1 and 49.2.
  • the lever mechanism is composed of three sub-devices, each for setting a cleaning parameter p5, p6 or. p7.
  • the part device for the radial adjustment of the whole device includes the lever 42 and a plate 43 on which all other parts of the device are mounted.
  • the intermediate device 45 for adjusting the radial position of the guide elements 410.1, 410.2 and 410.3 includes an intermediate lever 45 and a transverse lever 48.
  • the partial device for adjusting the distance between the guide elements and separating blades (p6) includes the lever 46 a cross lever 47.
  • Fig. 4.3 shows the sub-device for adjusting the distance between the entire device and the impact circle S (setting p7 and p5 together).
  • Bolt C is rotatably mounted on plate 43 and connects it to lever 42.
  • lever 42 is pivoted about bolt B rotatably mounted on plate 411, plate 43 moves in the above-mentioned guides.
  • Fig. 4.4 shows the sub-device for setting the distance between the guide elements 410.1, 410.2 and 410.3 and the impact circle S (setting psell). This distance is primarily given by the position of the plate 43 relative to the impact circle S, but can still be increased independently of this position.
  • the guide elements 410.1, 410.2 and 410.3 are coupled to the cross lever 48 by the bolt pairs L1 / M1, L2 / M2 and L3 / M3.
  • the cross lever 48 is in turn coupled to the intermediate lever 45 by the bolt I.
  • the intermediate lever 45 is pivotally connected to the lever 44 by the bolt G.
  • Fig. 4.5 shows the sub-device for adjusting the distance between each guide element 410.1 rsp. 410.2 and a separating blade 49.1 rsp. 49.2 (setting of p6).
  • the bolt pairs L1 / M1 rsp. L2 / M2 (and also L3 / M3) connect the guide elements 410.1 rsp. 410.2 (and also 410.3) also with the cross lever 47.
  • the cross lever 47 does not follow the movement which is triggered by the lever 44 (see FIG. 4.4), since the bolts L1, M1, L2, M2, L3 and M3 are in the corresponding radial slots U. M1, U.L1, U.M2, U.L2, U.M3, U.L3 slide in the cross lever 47.
  • Cross lever 47 is connected by bolt I to lever 46 which is pivotable about bolt G. If lever 46 is pivoted about bolt G, bolt I moves in its guide V on intermediate lever 45 on a concentric circle to impact circle S. Bolts G and E slide in corresponding slots in plate 43 (visible in FIG. 4.3). The cross lever 47 follows the movement and is guided by the bolt H in the corresponding slot T in the plate 43.
  • the guide elements 410.1 rsp. 410.2 (and 410.3) are thus on a circle concentric to the circumference of the opening roller 24 in the direction against the corresponding separating blades 49.1 rsp. 49.2 postponed. Her radial position is not changed relative to the opening roller 24 and relative to the separating blades 49.1 and 49.2.
  • Fig. 4.6 shows the plate 43, the lever 42 with the bolt B and the intermediate lever 45 and the pairs of bolts L1 / M1, L2 / M2 and L3 / M3, which push through the plate 43 and the shield 411, the places where the Bolt pairs J1 / K1 and J2 / K2 are fastened on the side of the plate 43 facing away from the lever mechanism, the bolt C, which is rotatably mounted in the plate 43, the bolts G, E and H, which in corresponding guides in the plate 43 and the bolt I, which is rotatably mounted in the intermediate lever 45.
  • FIG 5 shows an embodiment of the device for cleaning stage 4, a carding plate 51.
  • the depth of penetration of the card clothing 52 into the wadding (cleaning parameter p8) is set by varying the distance between the carding plate 51 and the opening roller 24, by moving on the radius extension of the opening roller 24.
  • the gradient of the carding intensity (cleaning parameter p9) is set by rotating the whole Carding plate 51 around the fulcrum A. This makes the passage gap (wedge-shaped) divergent or convergent in the running direction
  • the front edge 51.1 of the carding plate 51 can be designed as a separating blade and, in connection with the preceding cleaning stage (group of guide elements and separating blades), can assume the role of a third separating blade.
  • 6.1 (a and b) schematically show two embodiments of the device for the rearrangement stage (cleaning stage 5).
  • the figures show a section of the opening roller 24, cut perpendicular to its axis, with teeth 24.1.
  • the device for the rearrangement step 620.1 rsp. 620.2 attached on the side of the fiber wadding opposite the teeth 24.1, the device for the rearrangement step 620.1 rsp. 620.2 attached. It has a slot-shaped nozzle 622.1 rsp, which runs parallel to the axis of the opening roller. 622.2 and a brake plate 623.1 arranged in the direction of transport of the fiber wadding immediately behind the nozzle. 623.2 and a baffle 630.1 rsp. 630.2, which also each extend over the entire width of the opening roller 24.
  • the nozzle 622.1 rsp is used for the first phase of the rearrangement. 622.2, through which air is blown against the teeth 24.1.
  • 622.2 is connected over its entire length, for example, to an air supply duct 621, which is to be described in more detail in connection with FIGS. 6.2 and 6.3.
  • Figures 6.1a and 6.1b show the nozzle 622 in two possible embodiments: the nozzle 622.1 is designed such that it generates an air jet which forms an acute angle with the transport direction (FIG. 6.1a), while the air jet from the nozzle 622.2 is directed perpendicularly to the surface of the opening roller 24 (FIG. 6.1b).
  • the different angle between the air jet from the nozzles 622.1 rsp. 622.2 and the general direction of transport has no significant influence on the functioning of the relocation.
  • the brake plate 623.1 is perforated, for example perforated, and is arranged above a suction channel 624, so that air can be sucked out through the holes, as a result of which the aerodynamic force is generated against the braking surface 612.1.
  • the suction channel 624 extends under the brake plate 623.1 over the entire width of the transport roller and is described in more detail in connection with FIGS. 6.2 and 6.3.
  • the ratio of the air blown through the nozzle 622.1 and extracted by the brake plate 623.1 is an adjustable variable of the relocation point. More or less air can be blown in than extracted or the same amount.
  • the embodiment variant of the device according to the invention shown in FIG. 6.1b does not have a perforated, but a continuous brake plate 623.2.
  • the aerodynamic force directed against the braking surface 612.2 is generated only by the air from the nozzle 622.2 reflected by the surface of the opening roller 24 and above all by the teeth 24.1.
  • Variants of the embodiments shown in FIGS. 6.1 and 6.2 consist of: that the embodiment variants of the nozzles 622 and the brake plates 623 shown in FIGS. 6.1a and 6.1b are combined differently with one another, - That the baffle 630 is missing (for embodiments whose first element of the subsequent cleaning stage is a baffle).
  • Braking on the braking surface 612 is brought about by friction between the fiber material and the braking surface and is supported by the perforations in the brake plate 623.1 or by special surface design of a continuous brake plate 623.2, for example with grooves running perpendicular to the general direction of transport. Special precautions are advantageous so that the braking effect at the holes is not too great, such that the fibers are not only braked but held in place. Appropriate processing of the material must ensure, for example, that the hole edges on both sides of the brake plate 623.1 are absolutely free of brow.
  • FIG. 6.2 shows top views of embodiments of the device for the rearrangement stage according to FIGS. 6.1a and 6.1b, but without guide plate 630. They are directed perpendicular to the axis of the opening roller 24 and against the exit of the rearrangement point. The direction of rotation of the opening roller 24 is indicated by a vertical arrow on the visible side of the roller.
  • FIG. 6.2a shows the embodiment with broken brake plate 623.1 and suction channel 624 (according to FIG. 6.1a). shown.
  • the suction channel 624 is designed against the one end face of the opening roller with a cross-section that increases uniformly or in steps.
  • the suction channel 624 is connected to a suction unit (not shown), on the other front side it can have a false air opening 640, which can be provided with an adjustable throttle 641. Enough purge air is let in through this false air opening so that any dirt that is sucked in is transported out of the suction channel 624 without being separated out.
  • the air supply duct 621 is shown with the slot-shaped nozzle 622.1. The air supply duct 621 is also connected to a corresponding fan or the like (not shown) on one end face of the opening roller 24.
  • the cross section of the air supply duct 621 also increases over the width of the transport roller against the connection to the fan, so that the wind speed out of the nozzle 622.1 away from the fan remains essentially the same despite the ever smaller amount of wind.
  • a variant of this would be to make the wind tunnel so spacious that it has a wind chamber characteristic, so that the air speed from the nozzle 622.1, which is very narrow relative to the feed channel, is constant over the entire length of this nozzle.
  • such an embodiment appears to be disadvantageous especially for use in a fine cleaning machine because of its large space requirement.
  • FIG. 6.2b shows, as the same top view as FIG. 6.2a, that embodiment of the device for the rearrangement stage that has an uninterrupted brake plate 623.2 and therefore no suction channel but only one air supply channel 621. Everything that has been said for this air supply duct in connection with FIG. 6.2a also applies to this embodiment.
  • FIG. 6.3 now shows in detail a top view of a device according to the invention cut in the region of the front side of the opening roller facing away from the connections, seen parallel to the axis of the opening roller.
  • the opening roller itself is not shown, the general direction of the fiber flow is indicated by a long arrow.
  • the device again has an air supply duct 621 with a slot-shaped nozzle 622.1 and a suction duct 624 which is closed off by the perforated brake plate 623.1. Both channels have a cross section that increases in size towards the end face of the transport roller.
  • means 650.1 and 650.2 are also shown in this figure, with which the two partial devices for the two process phases are fastened to one another and to the machine frame.
  • Fig. 7 shows an embodiment of the device for cleaning stage 7, the exit of the cotton from the fine cleaning machine.
  • fiber fragments mainly dust
  • the screening effect is achieved by a separating element 61, on which the cotton is driven on by its own movement.
  • the separating element 61.1 which delimit the channel 62 de sieve perforated plate, with a suction channel 63.1 or the separating element 61.2, a sieve perforated plate which also delimits the channel 62, but which opens into the feed drum 23 and has a suction channel 63.2 arranged there.
  • a delimitation is drawn in dashed lines, which of course is not adequately shaped in terms of flow technology, as shown here. It is only intended to show that various embodiments ultimately find the aim of the method according to the invention, the difference being, for example, the energy to be used for the process.
  • the device claimed in the abovementioned patent application for ejecting the fiber outlet from a fiber cleaning machine is equipped with means which make it possible to continuously obtain a layer of outlet in a catch basin which serves as a lock layer between the machine interior and the exterior. This sluice layer prevents the aerodynamic cleaning process from being disturbed by incorrect air from the ejection device.
  • An embodiment variant of the ejection which is effectively depicted in FIG. 8, consists in that the collected dirt particles are ejected from the cleaning system with a constantly running lock roller 72 and then suctioned off. So that no false air can get into the cleaning system from the suction of the dirt particles, the suction is arranged perpendicular to the direction of ejection of the lock roller 72.
  • the various drums and rollers are driven by 3 primary drives 73.
  • the main motor 73.1 is provided with a frequency converter and drives the opening roller 24.
  • the second motor 73.2 also with a frequency converter, drives the screening drum 23, the blind drum 22, the take-off roller 31 and the feed roller 32.
  • the speeds of the two motors can be set independently of one another, in other words, the ratio of the peripheral speeds of the rollers driven by the second motor remains constant, but the ratio of the peripheral speeds of these rollers to the peripheral speed of the opening roller 24 is variable.
  • the third motor which is not shown in FIG. 8, drives the lock roller 72.
  • the cleaning stages 3, 4, 5 and 6 are not arranged in the order shown in the transport direction of the cotton wool.
  • the carding stage follows the relocation point, or is only arranged after the cleaning stage 6.
  • the carding level can also be missing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP90810706A 1989-09-21 1990-09-18 Procédé et appareil pour le nettoyage fin des fibres textiles Revoked EP0419415B1 (fr)

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
CH3452/89 1989-09-21
CH345289 1989-09-21
CH345289 1989-09-21
CH2812/90 1990-08-29
CH281290 1990-08-29
CH281290A CH682495A5 (de) 1990-08-29 1990-08-29 Verfahren und Vorrichtung zum Anspeisen einer Faserwatte an eine Auflösewalze.
CH298190 1990-09-13
CH298090 1990-09-13
CH2980/90 1990-09-13
CH298090A CH683529A5 (de) 1990-09-13 1990-09-13 Verfahren und Vorrichtung zum Umlagern von auf Zähnen transportierten Faserflocken.
CH298190 1990-09-13
CH2981/90 1990-09-13

Publications (2)

Publication Number Publication Date
EP0419415A1 true EP0419415A1 (fr) 1991-03-27
EP0419415B1 EP0419415B1 (fr) 1999-08-04

Family

ID=27428507

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810706A Revoked EP0419415B1 (fr) 1989-09-21 1990-09-18 Procédé et appareil pour le nettoyage fin des fibres textiles

Country Status (5)

Country Link
US (1) US5123145A (fr)
EP (1) EP0419415B1 (fr)
JP (1) JPH03241016A (fr)
DD (1) DD299322A5 (fr)
DE (1) DE59010880D1 (fr)

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US5247721A (en) * 1990-10-16 1993-09-28 Maschinenfabrik Rieter Ag Grid for the opening roll of a spinning machine
US5361458A (en) * 1990-03-22 1994-11-08 Maschinenfabrik Rieter Ag Apparatus for controlling machines for cleaning of fibers
DE19630018A1 (de) * 1996-07-25 1998-01-29 Rieter Ag Maschf Anlage zum Verarbeiten von Fasern
CN103046168A (zh) * 2013-01-28 2013-04-17 山东大学 锯齿式数控皮棉清理机

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DE59711965D1 (de) 1996-05-20 2004-11-04 Rieter Ag Maschf Anlage zum Verarbeiten von Fasern
EP0894878A3 (fr) 1997-07-30 2000-04-19 Maschinenfabrik Rieter Ag Nettoyeur de flocons
US6553630B1 (en) * 2001-04-11 2003-04-29 TRüTZSCHLER GMBH & CO. KG Device for setting the distance between adjoining fiber clamping and fiber transfer locations in a fiber processing system
HUE044279T2 (hu) * 2003-09-12 2019-10-28 Amgen Inc Cinakalcet HCl gyors feloldódású készítménye
JP5457830B2 (ja) * 2006-04-03 2014-04-02 オディディ，イサ オルガノゾル被膜を含む制御放出送達デバイス
DE102012012254A1 (de) * 2012-06-22 2013-12-24 TRüTZSCHLER GMBH & CO. KG Vorrichtung an einer Spinnereivorbereitungsmaschine, z. B. Reiniger, Karde o. dgl., zum Öffnen und Reinigen von Fasergut

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US5361458A (en) * 1990-03-22 1994-11-08 Maschinenfabrik Rieter Ag Apparatus for controlling machines for cleaning of fibers
US5247721A (en) * 1990-10-16 1993-09-28 Maschinenfabrik Rieter Ag Grid for the opening roll of a spinning machine
DE19630018A1 (de) * 1996-07-25 1998-01-29 Rieter Ag Maschf Anlage zum Verarbeiten von Fasern
CN103046168A (zh) * 2013-01-28 2013-04-17 山东大学 锯齿式数控皮棉清理机
CN103046168B (zh) * 2013-01-28 2015-10-28 山东大学 锯齿式数控皮棉清理机

Also Published As

Publication number Publication date
DD299322A5 (de) 1992-04-09
JPH03241016A (ja) 1991-10-28
EP0419415B1 (fr) 1999-08-04
US5123145A (en) 1992-06-23
DE59010880D1 (de) 1999-09-09

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