EP0810309A1 - Installation pour le traitement de fibres - Google Patents

Installation pour le traitement de fibres Download PDF

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Publication number
EP0810309A1
EP0810309A1 EP97810278A EP97810278A EP0810309A1 EP 0810309 A1 EP0810309 A1 EP 0810309A1 EP 97810278 A EP97810278 A EP 97810278A EP 97810278 A EP97810278 A EP 97810278A EP 0810309 A1 EP0810309 A1 EP 0810309A1
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EP
European Patent Office
Prior art keywords
shaft
card
feed
cleaning
flakes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97810278A
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German (de)
English (en)
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EP0810309B1 (fr
Inventor
Jürg Faas
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Filing date
Publication date
Priority claimed from DE1996130018 external-priority patent/DE19630018A1/de
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0810309A1 publication Critical patent/EP0810309A1/fr
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Publication of EP0810309B1 publication Critical patent/EP0810309B1/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
    • D01G21/00—Combinations of machines, apparatus, or processes, e.g. for continuous processing
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • D01G23/02—Hoppers; Delivery shoots

Definitions

  • the invention relates to systems for opening and cleaning fiber material, and to corresponding methods and devices.
  • the invention is particularly, but not exclusively, designed for plants for processing cotton or fibers with a similar staple length.
  • the material in the blow room is cleaned in at least one "cleaner" before it is passed on to the carding machine.
  • the cleaning function is as possible "in one machine” - see e.g. AT-C-231054, DE-A-2939861 (US-C-4345356) and DE-A-4039773 (US-C-5146652).
  • a cleaning line delivers material to a predetermined number (e.g. twelve) of cards.
  • the line must be designed to meet the maximum demand of the connected cards.
  • the aim is to adjust the performance of the blowroom line accordingly (i.e. a reduction in the number of cards connected to a blowroom line is undesirable).
  • DE-A-2532061 is concerned with the dedusting of cotton which is intended for use in the rotor spinning machine.
  • additional cleaning is provided in the filling shaft, i.e. the material has already been cleaned in the upstream machines according to the known principles. In other words, it was not planned to give up the fine cleaner and in fact this was not done in practice.
  • clamp feed where it is used below without additional explanation, means “clamp feed with subsequent cleaning function”, the material separation being an essential one
  • the feature of the cleaning function applies. This definition is briefly explained below.
  • the clamp supply is important for the finer resolution (the finer opening), which favors the fine cleaning.
  • the invention has nothing to do with opening as such. If the intensive opening (dissolving) has to be provided for purposes other than cleaning (e.g. when mixing), it is not directly influenced by the invention. However, the total load on the material is reduced by the invention, which at best benefits the use of the clamping power supply in connection with functions other than cleaning.
  • Fig. 1 shows schematically a blowroom line of known type.
  • a bale removal device 1 fiber flakes are removed from fiber bales 2 and via a conveyor path 3 to a first cleaning machine, for example a coarse cleaning machine 4, fed.
  • the amount of flakes conveyed per unit of time for example cubic meters / h, can be determined in the conveying path by means of a measuring device 54.
  • this measurement is dispensed with, storage depots (filling shafts) being provided on certain machines, as will be described below for the card with reference to FIG. 2.
  • the coarse cleaner 4 is not provided with a filling shaft, but for this it is designed in such a way that it can absorb, process and forward the maximum production of the bale removal device 1.
  • the machine 4 does not include a clamp supply, its mode of operation can e.g. EP-A-379726.
  • dirt is excreted and the pre-cleaned and already greatly reduced (i.e. at least partially opened) fiber flakes are fed via a further conveying path 5 to a second cleaning machine, for example called a fine cleaning machine 6, and in a more intensive manner than the first machine opened further and cleaned.
  • FIG. 1 shows only a single card 11.
  • a suitable flake feed for example according to EP-A-311831 and / or US
  • -C-4940367 divided into several cards 11.
  • Fig. 1 shows many other elements (e.g. the system controller 53) which are important for the invention according to EP-A-399315 but are of no importance for the present invention. A description of such elements is omitted here, reference being made to the cited EP document.
  • the present invention is in no way restricted to a control of the type shown - alternatives are e.g. shown in DE-A-3237864 and in EP-A-497535.
  • a revolving flat card known per se, for example card C50 from the applicant is shown schematically.
  • the fiber material supplied by the flake feed is fed into the filling shaft 8 in the form of flakes, taken over by a beater 39 (also called licker-in) as a wadding template, transferred to a reel 40 (also called a drum) and through the cooperation of the reel with a traveling lid set 50 further dissolved and cleaned.
  • the covers of the revolving cover set 50 are guided by a suitable drive system of the revolving cover assembly via deflection rollers 56 along a closed path (in the same direction or in the opposite direction to the direction of rotation of the drum).
  • Fibers from the fleece located on the reel 40 are removed by a customer 43 and formed into a fiber band 90 in an outlet section 80 consisting of different rollers.
  • This card sliver 90 is deposited from a sliver storage device 13 into a transport can 111 in cycloidal turns.
  • the card 11 is provided with its own programmable controller 120, and it is also a suitable "user interface" (eg a keyboard or a display) 210 is provided for the input of data and / or the output of status reports.
  • FIG. 3 again shows the card 11 with the filling chute 8 assigned to it.
  • the latter comprises an upper part (an infeed chute) 31 (see also FIG. 1) and a lower chute part (reserve chute) 34. Fiber flocks from the lower chute part 34 are passed through two conveyor rollers 35 as the aforementioned cotton 9 discharged and forwarded to the feed roller 37 of the card 11.
  • a feed device 32 (cf. FIG. 1), which feeds the flakes to an opening roller 33.
  • Such devices are generally well known. It is now intended to adapt this device in order to achieve a device according to the invention, which enables significant changes in the upstream system areas.
  • the feed device 32 and the opening roller 33, together with the adjacent part of the housing of the shaft, are reformed in such a way that a "fine cleaner" results therefrom.
  • the operating principle of this cleaner can be based on well-known principles, e.g. according to EP-A-419415 (US-C-5123145) and / or EP-A-481302, which represent more modern forms of the fine cleaner. These more modern machines enable intensive cleaning even at high throughput.
  • the throughput in the filling shaft of a card is relatively low compared to the throughput in a modern blow room, e.g. more than 70 kg / h, preferably more than 100 kg / h, but far below 500 kg / h (delivery of a conventional fine cleaner today).
  • Amounts of fibers e.g. between 100 kg / h and 200 kg / h can be cleaned according to the principles that e.g. in the older documents CH-C-464021, EP-A-108229 and / or EP-A-110017.
  • grate bars 102 are shown schematically with free spaces in between (not specifically indicated).
  • the free spaces enable the outlet to be discharged into a collecting space 103, which can be connected to a suction device (not shown) for removing the separated material.
  • the connection can be generated continuously or, preferably, intermittently.
  • the invention is not restricted to the elements 102 shown.
  • Separation elements in the form of "sucked-off knives" are known which can be used in addition or as alternatives in the arrangement according to FIG. 3.
  • the feed device 32 represents a "clamp feed” for the opening roller 33, as explained in the introduction.
  • This clamp feed consists of a feed roller 321 and a trough 322.
  • many other forms of such clamp feeds are known, such as can be found in EP-A-383246 or EP-A-470577, and they can also be used in the new cleaning station will.
  • the clamping supply designed as a kind of "dosage” according to EP-A-383246.
  • this is not an essential feature of the present invention.
  • the new cleaning station can also be used in other arrangements, e.g. where the shaft 8 is connected to the card 11 in such a way that the intermediate rolls 35 can be dispensed with.
  • Such arrangements are e.g. in DE-A-3733631, DE-A-3733632 and DE-A-3734140.
  • a number of licker-ins 39 can also be provided, e.g. is proposed in DE-A-4331284.
  • the invention is also not restricted to use in the revolving flat card.
  • Fixed-lid card known (see DE-A-4418377), which can also each be equipped with a filling shaft according to this invention.
  • the invention can also be used in combination with so-called cards for processing long staple fibers.
  • the new cleaning point is preferably integrated in the shaft control, as is also shown schematically in FIG. 3.
  • This controller typically includes a controller 323 for a speed controllable motor 324 which drives the feed roller 321.
  • the controller 323 is connected to a fill level sensor 325, various (optical or pressure-sensitive) sensors are known which can perform this task, so that a detailed description can be dispensed with.
  • the filling level in the lower shaft part 34 can be kept within predefinable tolerances.
  • a sensor S can also be provided in the outlet and connected to the controller 323, so that the production of the cleaning point can be adapted to the production of the card.
  • Such an arrangement for a filling shaft without a cleaning point
  • DE-A-3625311 and from DE-A-3244619 US-C-4535511).
  • FIG. 3 Another variant, which is indicated in FIG. 3, is also known from the prior art, namely the provision of a displacement or force sensor 326, which is also connected to the controller 323 for signal transmission.
  • the sensor 326 measures the path covered by the trough 322, or the forces exerted on it, in order to enable a type of "dosing" (e.g. according to EP-A-383246).
  • the new cleaning point can be designed in such a way that it is able to process fiber material that has not previously run through any type of clamp feed. In any case, it should be designed so that it Can process material that has not previously been supplied by a cleaning point with a clamping supply.
  • a material in the upper shaft part 31 should have a number of nits which is less than 50% higher than the number of nits of the raw material presented to the bale removal 1.
  • the proportion of short fibers in shaft part 31 can be less than five percentage points higher than the corresponding proportion in the aforementioned raw material (measured according to the well-known, proven Almeter measuring method). The following example is intended to clarify the last statement - if the short fiber content in the bale feed is X% (e.g. 30%), the short fiber content in the upper shaft part 31 should be less than (X + 5)% - in this case ⁇ 35%.
  • the cleaning point in the shaft 8 does not have to be specifically designed to ensure dedusting, although dust is always removed (to a certain extent) where an extraction is provided.
  • the new cleaning station should under no circumstances be designed in such a way that the resolution on individual fibers is aimed for. Such a degree of resolution in the shaft is not desirable.
  • Fig. 4 shows three blowroom machines 1,4,90 in a "strand" followed by a card 11 from a card group, which is supplied with fiber material from the blowroom strand.
  • the different machines are shown on different scales, since Fig. 4 is only designed to explain the processing steps. These steps are first explained for the processing of a fiber range consisting of 100% cotton, then a variant for processing a fiber range consisting of 100% synthetic fibers is explained.
  • the card 11 and its filling shaft 8 are designed in accordance with the embodiment of this invention shown in FIG. 3 and are therefore only shown in outline in FIG. 4.
  • the reference numeral 70 indicates the turret of a bale opener 1.
  • the tower 70 is rotatably mounted on a movable carriage 72 and carries a removal arm 73 of a known type, with which fiber flakes of bales (not shown in FIG. 4, but see bale 2 in FIG. 1 ) are milled off.
  • the carriage 72 is movable on rails 74 along a transport channel 75, the aforementioned bales being set up on one or the other or on both sides of the rails 74 for bale removal and the removal arm 73 resting on the upwardly facing surface of the bales.
  • a flow of transport air is generated in channel 75 by suitable means (not shown).
  • the arm 73 comprises at least one rotatable milling drum (not shown) which mills off the flakes and delivers them into the transport channel 75 in the tower via a connecting channel (not shown in FIG. 4).
  • the channel 75 is provided with an endless masking tape 76 which moves in the longitudinal direction of the channel 75 together with the carriage 72.
  • a control desk 77 is located at one end of the movement path for the slide.
  • the bale opener 1 according to FIG. 4 is fundamentally more conventional Type, for example a machine of the type "UNIFLOC”, which is offered worldwide by the applicant, similar machines being offered by other machine manufacturers and being able to be used in the same way as "UNIFLOC" in this first processing step.
  • the transport channel 75 merges into the conveying path 3 (see FIG. 1), which leads to the entrance 81 of a coarse cleaner 4.
  • the air / flake stream then first flows through a dedusting area 82, where a portion 83 of the air stream is drawn off through a perforated wall 84.
  • the remaining flake / air flow is guided spirally around a drum 16 which is provided with a beater 17, a part of the contaminants conveyed through grates 86 falling into a chamber 21 below the grates. They can be removed from this chamber 21 by means of a transport suction, not shown, via a lock 88.
  • the flake / air flow inlet 81 is at one axial end of the drum and an outlet 89 is provided at the other end of the drum 84.
  • Further details of this machine are e.g. from EP-C-381860, EP-C-379726, EP-C-447966 and EP-C-455017, such a machine being offered by the applicant under the name "UNICLEAN".
  • the most important feature of this machine is that in this second processing step the cotton flakes are cleaned in free flight (without pinching or restraint).
  • Machines from other manufacturers are also designed to clean the flakes by beating in free flight, with in some cases several rollers (e.g. "duo rollers") being arranged side by side. Such machines can also be used for the second processing step in the processing of cotton.
  • the coarse cleaner 4 delivers the flakes to a mixing machine 90 through the pneumatic transport system via the conveying path 5 (cf. FIG. 1).
  • the machine 90 comprises several (in the example shown, six) vertical chutes 91, where the flakes are separated from the transport air. All shafts are connected to conveyor path 5 via a common entrance, so that each shaft receives 91 fibers from the same range.
  • the chutes 91 merge into a mixing chamber 92, where the fibers are conveyed on by a horizontal conveyor belt 93 against an inclined conveying means (for example a needle slat) 94.
  • the conveyor 94 takes fiber from the mixing chamber 92 and passes it on to a chute 95, rollers 96 cooperating with the conveyor 94 so that clumps of fiber are thrown back into the mixing chamber 92 or opened. Because of the different paths that the fibers have to travel through the shafts 91 and the chamber 92 to the conveying means 94, a phase shift takes place when the various “fiber packets” are being transported, as is indicated schematically in FIG. 4. This phase shift results in a thorough mixing of the fibers which have been sequentially milled off from different bales. The basic principle of this machine has been described in CH-C-511951, whereby a more modern version of the machine is offered by the applicant under the name "UNIMIX".
  • the unit 97 passes flakes to a pipe 98 which passes into a pneumatic transport system in order to pass the flakes on to a fine cleaner 6 (FIG. 1).
  • the fine cleaner 6 often also serves as a feed machine for feeding the flock to the carding machine (see line 7, FIG. 1).
  • a "fine cleaning machine" is no longer provided as a single machine.
  • the outlet unit 97 now has to take over the function of the feed machine and the outlet pipe 98 therefore merges into a channel 100 which directs the flakes to all cards of the card group assigned to the feed machine. 4 shows only one card 11 of this group, indicating that the channel 100 continues to supply other cards.
  • the flake feed for the cards remains in itself uninfluenced by the invention and is therefore not explained in detail here.
  • the flake feed must be controlled, for which purpose a sensor 101 and a control device 102 according to EP-C-303023 is shown in FIG. 4, wherein the device 102 also receives signals from the cards and controls the feed machine (outlet unit 97) accordingly, which with the line 103 is indicated schematically and is explained in the aforementioned EP document.
  • the control can also be designed according to EP-C-311831 in order to enable "stop / go optimization".
  • the outlet unit 97 (as shown in FIG. 4) itself represents an opening stage because it comprises an opening roller 104 with a clamping feed (in the form of a pair of feed rollers 105).
  • the outlet unit 97 consists of a direct (reversal) connection between the shaft 95 and the pipe 98 if the assortment to be processed does not require an opening step at this point.
  • the outlet unit 97 is in any case preferably designed as a controllable unit which can take over the flake feeding function, since an additional feeding machine would otherwise have to be used.
  • the controllable unit could, however, be formed from the shaft 95 and the feed roller pair 105 (without opening roller 104), the feed roller pair 105 delivering fibers directly into the transport air stream which is generated in the pipe 98 or line 100 by suitable means (not shown). This means that the system can now be designed in such a way that no clamping feed (with or without material separation) is provided in front of the card filling shaft.
  • the outlet unit which is integrated in the mixer in FIG. 4 could of course be formed as a separate module which takes over the fibers from the mixer and reproduces them in a controlled manner.
  • FIG. 5 shows a blowroom installation that is designed to form cotton / synthetic blends and to deliver them to a carding machine according to this invention (not shown in FIG. 5).
  • the plant comprises a bale opener 1, a coarse cleaner 4 and a mixing machine 90, however (compared to FIG. 4) in a different plant configuration.
  • the line 3 is now provided with a branch A (a controllable flap), so that flakes can be selectively delivered to the coarse cleaner 4 (via the branch 3X) or to the mixing machine 90 (via the branch 3Y).
  • the work area of the bale opener 1 is divided into “blocks", whereby each block can be filled with an "own” range of fibers (cotton or synthetic, e.g. polyester) (for such a procedure, see e.g. EP-C-221306).
  • the flakes from the cotton range (s) contain impurities that should be removed as far as possible. They are therefore sent to the coarse cleaner 4.
  • the flakes from the synthetic range (s) do not contain any bodies that can be removed by excreting material. They are therefore delivered to the mixing machine 90.
  • the aforementioned flap is controlled according to the position of the removal arm 71 in relation to its working area.
  • the outlet unit 97 of the machine 90 comprises guide elements 107 which convey the fiber material from the shaft 95 to the pipe 98, this material being opened by the cooperation of the opening roller 104 with the pair of feed rollers 105, i.e. the flake size is reduced.
  • outlet unit 97 does not serve as a feeding machine for the carding machine, since the synthetic fiber must be mixed with cotton fibers before carding.
  • the latter step takes place in machine 110, which operates according to EP-A-628646 or EP-C-383246.
  • the machine 110 also includes several (five in the example) chutes 111, 112, 113, 114, 115, where the flakes are separated from the transport air.
  • these shafts are not (like shafts 91, FIG. 4) connected to a common input, but each with its own input 111E, 112E. 113E, 114E or 115E.
  • the shafts of the machine 110 can therefore each be supplied individually, individually, with fibers, in the example shown with five different ranges.
  • only two lines 116 and 117 one 116 for cotton, the other 117 for synthetic fibers
  • each shaft 111, 112, 113, 114, 115 have been shown, it being possible for each shaft 111, 112, 113, 114, 115 to be assigned its own feed line.
  • this line like line 117, is connected to a mixing machine 90, one mixing machine must be provided for each assortment.
  • a variant with a mixer 90A on the line 116 is indicated by the dashed box 90A, wherein in the variant shown only a single assortment of cotton can be supplied to all three shafts 111, 112, 113. If on the mixing in front of the machine 110 can be dispensed with, it would be possible to send different cotton assortments sequentially via a common line 5A to a shaft 111, 112, 113 using a flap at the branch AZ. In such a case, however, it is advantageous if the coarse cleaner 4 can be individually adjusted for processing each assortment, for example according to EP-A-641870.
  • the additional mixing machine 90A could at best be dispensed with if the three shafts 111, 112, 113 of the machine 110 together with the assembly 120, 121 ensure sufficient mixing (by means of doubling).
  • each shaft of the machine 110 is provided with a metering unit 118 (only indicated for the shaft 111, the other units being identical).
  • the mode of operation of this unit 118 is described in EP-C-383246 and is not repeated here.
  • the metering units 118 each form a fiber layer on the common conveyor belt 119, which feeds them to a compressor 120, where a wad of all five layers is formed.
  • the cotton wool is delivered to an opening unit 121 (indicated schematically), where flocs are again formed and delivered to a tube 123 for forwarding to a fan 124.
  • the blown air flow from fan 124 can be used to transport the flakes further.
  • the run-out unit 120, 121, 123, 124 serves as a feed machine for the carding machine.
  • Diagram 6 comprises three diagrams A, B, C, which show the respective course of the degree of cleaning for three different blowroom configurations.
  • Diagram A (above) corresponds to a blow room ("blow room I"), in which the cleaning function is concentrated in particular in a single step.
  • Diagram B corresponds to a blowroom ("blowroom II"), in which the cleaning function is divided into several stages.
  • Diagram C corresponds to a blow room ("blow room III") according to the present invention.
  • Each diagram assumes a dirt content in the bale (level B) in the order of 3%.
  • the levels of coarse cleaning (G), mixing (M), fine cleaning (F), and reserve chute (S, in the carding machine chute) are listed for all diagrams, although there is no coarse cleaner in blowroom I and no fine cleaner in blowroom III.
  • the "curves" connect measured values, each measured value representing the respective residual dirt content at the exit of the specified level.
  • FIG. 7 comprises two diagrams which correspond to the course of the nits for blowrooms I / II or III, each diagram assuming a number of nits in the bales of the order of magnitude of 250. Since the nits are approximately the same for today's blowrooms I and II, only an average of the values for such blowrooms is shown in FIG. 7.
  • the degree of opening is not shown separately here.
  • the course of the degree of opening corresponds approximately to the course of the number of nits.
  • the number of nits tends to increase with the degree of opening because it is "easier" to curl well-opened fibers into nits. It is therefore an advantage of the arrangement according to the invention that the "fine opening" is carried out relatively late.
  • the fibers can thus be conveyed through the transport tubes as relatively coarse flakes, which reduces the formation of nits in these tubes.
  • the number of nits also depends on the flow rate when opening.
  • the distribution of the total amount of fibers on the card slots before performing the fine opening is therefore in itself an advantage in avoiding nits.
  • FIGS. 8A to 8J schematically show different designs as examples of a feed device 32 with a clamp supply.
  • the designs are additionally designed as dosing devices according to EP-B-383 246, but this is not essential for the present invention. If the metering is not necessary in a particular case, the feed device can be simplified accordingly, since the measurement of the distance "x" in the clamping gap provided in EP-B-383 246 is then omitted. Even if the metering is provided, it is sufficient for the card filling chute at best, to meter a volume flow (rather than a mass flow) In such a case, it is possible to dispense with special measures to keep the density of the material in the clamping gap constant.
  • the distance between the clamping point and the fiber take-over point is in each case indicated by "P".
  • This distance is (according to the aforementioned feature FR4) when processing "Short staple fiber” (cotton and man-made fiber with appropriate staple lengths) is chosen to be no larger than 100 mm and preferably in the range from 14 mm to 40 mm.
  • the "cleaning parameter" P can be adjustable in accordance with EP-A-419 415 so that the parameter corresponds to the material to be processed Fiber range can be adjusted.
  • the parameter P can be made adjustable, for example, by means of a controller with a cleaning map according to EP-A-452 676.
  • FIG. 8A The arrangement of a metering device 32 with feed rollers 318, 320 and the opening roller 33 is shown in FIG. 8A.
  • the two side walls 156, 158 of the flake shaft extend close to the surfaces of the feed rollers 318 and 320 and diverge slightly from one another so that no flake jams occur.
  • the flakes 160 in the shaft 3 are gripped by the feed rollers 318 and 320 rotating in opposite directions in the direction of the arrow, and are compressed to form a flake cotton wool 162.
  • the opening roller 33 then loosens the flakes out of this cotton flake and forms a flake flow 132 which continues to move in the direction of arrow 164.
  • All flakes detected by the feed rollers rotating at the speed n are transported through a conveyor gap, the width x of which represents the smallest distance between the two feed rollers and the length of which corresponds to the length of the feed rollers or the width of the side walls of the shaft.
  • the axis of rotation of the feed roller 318 is identified by 166, the axis of rotation of the feed roller 320 by 168 and the axis of rotation of the opening roller 33 by 170.
  • the axis of rotation 166 of the feed roller 318 like the axis of rotation 170 of the opening roller 33, is fixedly arranged in the flake shaft.
  • the axis of rotation 168 of the feed roller 320 is carried by two arms 172, only one of which can be seen in the figure.
  • the second arm 172 is located on the other end of the feed roller 320 and is designed in exactly the same way as the arm 172 shown.
  • This arm 172 is mounted on the axis of rotation of the opening roller 33 and can therefore carry out rotary movements about this axis of rotation 170 in the direction of the double arrow 174. As can be seen, such movements lead to a change in the distance x.
  • a pretensioning device 176 is provided, specifically in the form of a pretensioning spring 178, which rests at one end against a stop 180 fixedly arranged on the filling shaft and at its other end against a stop 182 connected to the arm 172.
  • a rod 184 extends between the stop 180 and the stop 182 and is arranged displaceably within the stop 182.
  • a second pretensioning device 176 is provided on the other end of the feed roller 320 and also presses on the associated arm 172 there.
  • the two springs 178 therefore try to reduce the distance x.
  • the minimum distance x is predetermined by a stop device 186, which cooperates with the arm 172 shown.
  • Another stop device 186 is located on the other end of the feed roller 320 and works in a corresponding manner with the arm 172 there.
  • the distance x arises in operation depending on the pressure prevailing in the conveyor shaft, the density and the degree of opening of the flakes and the force of the springs 178, the size of the distance x being able to be determined by the displacement movement of the rod 184 within the stop 182.
  • the rod 184 and the stop 182 are designed as a path measuring device.
  • FIG. 8B now shows an embodiment which is very similar to the embodiment of FIG. 8A, but with the feed roller 318 no longer being driven separately, but simply being freely rotatable.
  • This design is based on the knowledge that the flake flow resulting from the feed roller 320 exerts considerable frictional forces on the feed roller 318, especially when the surface of the feed roller 318 is not smooth, but has a surface texture which leads to an increased coefficient of friction, whereby these frictional forces are quite sufficient to drive the feed roller at a surface speed which corresponds to the speed of the flake flow or the surface speed of the feed roller 320.
  • the design of the embodiment according to FIG. 8B largely corresponds to that of the embodiment according to FIG. 8A, which is why the same reference symbols are used for the same parts, so that a separate description of these parts is not necessary. It is sufficient to point out that the axis of rotation 166 of the feed roller 318 is fixedly arranged, while the feed roller 320 is driven in the direction of travel. Conversely, it would be equally possible to drive only the feed roller 318 and to design the further feed roller 320 to be freely rotatable.
  • the arrangement of the opening roller 33 and the driven rotatable feed roller 320 has remained the same, which is why the same reference numerals have been retained for these parts.
  • the feed roller 318 has, however, been replaced by a fixed chute 300 which, together with the feed roller 320, forms a conveyor gap 302 which has its minimum width at point 304.
  • the slide 300 has been replaced by a circumferential belt 306 which is guided around two deflection rollers 308 and 310.
  • the upper deflection roller 308 is driven about the axis 312 in the direction of arrow 314 at a speed such that the surface running speed of the belt 306 in the direction of arrow 316 is equal to the surface running speed of the rotatable feed roller 320.
  • the arrangement of the rotatable feed roller 320 and the opening roller 33 corresponds to that of FIG. 8A, which is expressed by using the same reference numbers. This arrangement is not described here for brevity.
  • a deflection roller 310 In the case of a driven revolving belt 306, it is not absolutely necessary to provide a deflection roller 310 in the lowest region of the loop formed by the belt. Instead, the tape can be guided over a triangular guide body 218, for example. In this example, however, it is also possible not to drive the belt at all, but rather to move it under the frictional forces exerted by the floc stream. In such a case, it is desirable to provide a deflection roller 310 which can be freely rotated about the axis 220, in addition to the then also freely rotatable deflection roller 308, so that the friction preventing the free movement of the conveyor belt is kept as low as possible.
  • the minimum width 304 of the conveyor gap 302 is also arranged in this example at the lower end of the circulating belt.
  • FIG. 8E shows a driven feed roller 320.2 and a fixed feed trough 322.
  • the feed roller 320.2 can be rotated in the direction of the arrow about the axis of rotation 168.2, and the axis of rotation 168.2 is supported at both ends by the respective link 172.2, the two links 172.2 (from of which only the one can be seen in FIG. 8E) are articulated at the upper end of the fixed feed trough 322 on the axis of rotation 324.
  • the conveyor gap 302 has its minimum width at the point 304.
  • This attachment of the feed roller 320.2 enables the minimum width 304 to be changed by pivoting movements of the handlebars in accordance with the arrows 174.2.
  • the pretensioning device 176.2 is designed in accordance with FIG. 8A, but grips the lower end of the links 172.2 from above and thus forces the feed roller in the direction of the feed trough 322.
  • both feed rollers have been replaced by circulating belts 306 and 326.
  • the arrangement of the circumferential belt 306 around the two deflection rollers 308 and 310 corresponds completely to the arrangement of the corresponding circumferential belt 306 in FIG. 8D, which is why this arrangement is provided with the same reference numerals and is not described here separately.
  • the revolving belt 326 is designed approximately the same, that is, it runs around an upper deflection roller 328, which is driven and rotates about the axis 330.
  • the circulating belt 326 is also guided over a lower deflection roller 332, which is arranged so as to be freely rotatable about the axis of rotation 334.
  • a pretensioning device 176.3 acts, which is essentially designed in accordance with the pretensioning device of the previous figures, but with the additional measure that the parts 182 are connected to one another at both ends of the axis of rotation via a stable rod 336 to ensure that the gap width at the narrowest point 304 of the conveyor gap 302 remains constant over the entire axial length of the deflecting rollers 310 and 332.
  • a rod 336 can also be provided in the other versions.
  • the axis of rotation 330 of the deflection roller 328 is mounted with the axis of rotation 334 of the roller 332 on a common support body (not shown) so as to be pivotable about the axis 330.
  • either both circulating belts can be driven at the same surface running speed, or either only the rotating belt 306 or only the rotating belt 326 can be driven, and the other rotating belt can then freely rotate.
  • the lower deflection point it is preferred to design the lower deflection point as a freely rotatable roller.
  • deflecting bodies such as, for example, 318 or 338 can be provided, wherein, for example, the deflecting body 318 can be arranged in a fixed manner and the deflecting body 338 can be arranged to be movable.
  • the mobility of the deflecting body 338 is limited to a pivoting movement about the axis 330.
  • the minimum width 304 changes during operation, and the changes in this distance are taken into account when regulating the surface circulation speed of the driven rotating belt or belts.
  • FIG. 8G ultimately shows a further development of the embodiment according to FIG. 8C, the rotatable feed roller 320 having been replaced with a rotating belt 326 corresponding to FIG. 8F.
  • the rotating belt 326 in this example must be a driven belt.
  • the width 304 changes during operation, and the changes in this width are taken into account when regulating the surface running speed of the circulating belt 326.
  • This rotational speed is of course predetermined here, as in all other embodiments in which revolving belts are used, by the rotational speed of the associated driven deflecting roller, in this example 328.
  • FIG. 8H shows an embodiment in which the feed roller 320.5 is driven in the direction of the arrow about a fixed axis of rotation 168.5.
  • the feed roller 318 is replaced by a spring-loaded plate 370, that is to say the plate is prestressed against the flake mass in the direction of arrow 372 with a pretensioning device 176.5.
  • Guides 374 and 376 which are arranged below and above and on both sides of the plate 370, ensure that the plate can only move along the arrow direction 372.
  • the measuring device which emits a signal that reflects the change in the distance 304 of the minimum width of the conveyor gap 302, is installed in the pretensioning device 176.5.
  • the spring-loaded plate 370 instead of realizing the spring-loaded plate 370 in this form, it could also be designed as a leaf spring itself, in which case a separate sensor would be required in order to determine the changes in the distance 304 which occur during operation.
  • FIG. 8J shows a further modified arrangement of the embodiment according to FIG. 8A, but in which both feed rollers 318.4 at a desired production m should have a fixed distance from one another and rotate about fixed axes of rotation 166.4 and 168.4, specifically in the directions of rotation which are caused by the Arrows and are given.
  • the opening roller 33 rotates about the likewise fixedly arranged axis of rotation 170.
  • the axis of rotation 168.4 of the feed roller 320.4 is supported at its two ends by approximately triangular plates 340 in front view (only one of which can be seen in FIG. 8J), the two plates being connected to one another via connecting rods (not shown). are connected.
  • the plates 340 are in turn arranged to be pivotable about a fixed axis of rotation 342, as indicated by the double arrow 344. In operation, however, a fixed position of the triangular plates 340 and therefore also the axis of rotation 168.4 of the feed roller 320.4 is selected. This is done via a threaded spindle 346, which is passed through a solid part 348 with an internal thread.
  • the part 348 is arranged in a machine-fixed manner.
  • a handwheel 350 which can also be replaced by a motor drive, enables the threaded spindle 346 to be rotated, as a result of which the position of the triangular plates 340 can be determined. Since a corresponding spindle arrangement is also provided for the second triangular plate (not shown), the two spindle drives are to be coupled to one another, which can be done, for example, via the rotating belt 352.
  • each threaded spindle 346 there is a yoke 354, the legs 356 and 358 of which are arranged on the respective side of a tab part 360 of the associated triangular plate 340.
  • load cells 362 and 364 which are connected to the computer via lines (not shown).
  • the two feed rollers convey the flake material through the conveyor gap 302 and through the location 304 of the minimum width, and a force P acts on the feed roller 320.4, which tries to pivot the triangular plates 340 about the axis of rotation 342. Actual pivoting does not occur because it is prevented by the spindle-yoke arrangement.
  • the load cells 362 and 364 enable the size of this force to be determined by the computer, which also takes into account the geometric circumstances.
  • the fluctuations in this force correspond to the fluctuations in the density of the flake flow at point 304 and are processed by the computer to regulate the rotational speed of the feed roller 320.4 and, if appropriate, the feed roller 318.4, if this roller is also or alternatively driven, so that the desired mass flow m SOll is maintained becomes.
  • the minimum width 304 can be changed or set by means of the spindle 346, so that the speed changes of the feed rollers can be kept within predetermined limits, regardless of the intended production.
  • the pre-tensioning devices 176, 176.3 and 176.4 are shown in FIGS. 8B to 8G as in the embodiment of FIG. 8A, it is understood that in practice these Biasing devices should preferably be realized by gas pressure springs or hydraulic arrangements in order to keep the biasing force constant regardless of the change in the minimum width 304. Also, in the new exemplary embodiments, the geometry can in part be selected such that compensating forces occur which, even when using a conventional compression spring, lead to a force which, with adjustment of the one feed device, does not result in a change in the preload force or only to a small extent.
  • FIG. 8K schematically shows an arrangement according to EP-A-419 415 with an opening roller 33 and a feed device 32, which comprises a feed roller 320 and a feed trough 300.
  • the directions of rotation of the rollers result in a synchronous feed, that is to say the fiber material is carried away from the feed trough 300 by the roller 33, and is not returned between the trough 300 and the surface of the roller 300 after being taken over by the roller 33.
  • the feed roller 320 is arranged opposite the roller 33 such that a compression gap V is defined where the radius R of the roller 33 is flush with the radius r of the roller 320. This compression gap V defines the "takeover point" where the fiber material is taken over by the roller 33.
  • the feed trough 300 is arranged opposite the feed roller 320 such that together they define a narrowest point ES.
  • the distance "p" between the point ES and the compression gap V should, according to EP-A-419 415, be adapted to the stack length of the material to be processed. This is preferably accomplished by adjusting the trough 300 relative to the roller 320, as by 8K
  • the position of the trough 300 is preferably adjustable about the axis of rotation of the roller 320 in order to change the angular position of the radius (indicated by dashed lines) by the narrowest point ES relative to the radius r.
  • FIGS. 9, 10 and 11 each show one possibility of realizing the cleaning function according to FIG. 3 using known devices which have already been proposed for fine cleaning.
  • the reference number 31 indicates the upper part of the shaft (feed shaft)
  • the number 32 indicates a feed device with a clamping feed
  • the number 33 indicates an opening roller (see FIG. 3).
  • Figure 9 is derived from Figure 1 of CH-C-464021.
  • the latter document describes a fine cleaner from the sixties.
  • a racket 33 with sawtooth fitting 403 mounted in a housing 401 receives roughly opened fiber material from a shaft 31 via a pair of compressor rollers 405 and a feed device 32 in the form of a pair of feed rollers 406 the bat's sticks 407 placed close to the impact circle, the angle ⁇ to the radius being approximately 60 ° + 10 °.
  • the other surface forming the front edge encloses a small angle of about 0 to 2 ° with the tangent.
  • All the bars 407 forming the grate sit on a frame 412 which can be folded down about the axis of rotation 411 and which, after being folded down into the dot-dash position, allows the racket 33 to be moved approximately horizontally to the left after opening the housing wall 413 and by another desired racket, for example with a new or different one Set to exchange.
  • a guide plate is attached to each grate bar 407 and has a guide surface running in the tangential direction close to the impact circle. It covers the racket 33 about half the distance to the next leading edge.
  • Each plate is adjustable along its rod 407.
  • the arrangement according to CH-C-464021 had to be changed by providing the racket on its diametrically opposite side with a casing 415, which adjoins the wall 416 of the lower shaft part, one of which Tapping edge 417 is provided between these wall parts.
  • the edge 417 can be formed from the wall parts 415, 416, or it can be formed separately and mounted on the wall parts. It serves to separate the fiber material from the roller 33 and to divert it into the lower part of the shaft.
  • Fig. 10 derived from EP-A-481302, shows a more modern design according to the same principle with a feed shaft 31, which releases flake material in a converging gap between a blind drum 502 and a sieve drum 503, the latter sucking air out of the fed cotton.
  • This deaerated cotton is fed as a fiber mat to a take-off roller 504 and from there into a further converging nip between a feed trough 322 and a feed roller 321 and fed to an opening roller 33 by means of this feed roller 321.
  • This opening roller 33 takes over the fed fibers with the teeth 508 provided on its surface (also referred to as toothed clothing), as a result of which, in a manner known per se, a fiber layer in the form of a nonwoven fabric is guided by the teeth 508.
  • this non-woven fabric has a tendency to be carried away from the teeth, which is why this fiber layer, before it is led to a first grate bar module M1, depending on the distance between the feed roller 321 and the first module M1, by means of a guide surface 541 located in front of the first cleaning module M1 (viewed in the direction of travel D of the opening roller 33) and thereby prevented from being flung away.
  • the fiber layer is then guided past a series of cleaning elements or grate bar modules, which are designated M1, M2.
  • the grate bar modules M1 are shown on an enlarged scale with the aid of FIG. 10A. It is a grate rod 548 with end flanges with a separating edge 577 and a guide surface 576, while the grate rod module M2 is a set rod with end flanges 80 with a tooth set 549 (FIG. 10).
  • the grate bars M1, M2 are received in a grate 509, as will be explained in more detail below.
  • the fiber layer located on the teeth 508 of the opening roller 33 reaches an opening 545 of the lower shaft part due to the centrifugal force.
  • the grate 509 has two grate frames 509a (only one frame can be seen in FIG. 10) between which the grate bar modules M1, M2 are fastened, the flanges of the grate bar modules abutting the inner surface of the grate frame.
  • the grate frames 509a, and thus the grate 509, are pivotably mounted by means of a pivot axis 510.
  • the grate can also be adjustable in the X or Y directions by making the bearing for the pivot axis 510 adjustable, e.g. by means of adjusting motors 521 and 522.
  • Each grate frame 509a has a guide cam 511 with a guide surface 512, against which a guide roller 513, which is part of an adjusting mechanism 514, bears.
  • a filled circle (or circular point) identified by 533 is intended to represent a fixed connection of a pivoting lever 542 (identified only once in FIG. 10) to a grate bar module M1 and, at the same time, a pivot axis of the pivoting lever 542 and the grate bar module, so that when it is pivoted Pivot lever 542, the grate bar module M1 is pivoted about this pivot axis 533.
  • the position of the module M1 on the pivot axis 533 is fixed by means of a fixing screw 575 (FIG. 10A).
  • the other end of each pivot lever 542 is pivotally connected to a power transmission lever 536 by means of a joint 535.
  • the last of the articulation points 535 pivotally connects the preceding force transmission lever 536 to a plunger 537, an adjusting motor 538, which in turn is pivotally connected to a stationary carrier element 539. Since all the power transmission levers 536 are connected to one another by means of the aforementioned articulation points 535, all the power transmission levers 536 make the movement of the ram 537 at the same time, so that all grate bar modules which have a fixed connection 533 to the pivot lever 542 are pivoted.
  • FIG. 10 also shows an empty circle, identified by 534, which merely indicates that the grate bar module M2 is not connected to the pivot axis 533 and thus not to the pivot lever 542 at this point and that the pivot axes 533 and the pivot levers 542 are only required so that the power transmission can work via all the power transmission levers 536.
  • the fixedly arranged grate bar module M2 is firmly connected to the grate frame 509a by means of a screw 543.
  • the screw 543 is guided in a guide slot provided in the grate frame 509a and directed radially to the axis of rotation of the opening roller 33, so that the position of these grate bar modules within this slot can be changed.
  • FIG. 10A shows two grate bar modules M1, shown enlarged, with an angle of attack ⁇ 1 and clearance angle ⁇ 1.
  • the angle of attack ⁇ 1 is formed by a guide surface 574 and the impact circle 544 shown as a straight line in these figures, while the clearance angle ⁇ 1 is formed by the impact circle 544 and the guide surface 576 shown simplified as a straight line in FIG. 10A.
  • the guide surface 574 serves to guide the dirt detached from the nonwoven fabric.
  • the pivot shaft 533 is located in the region of the left corner of the grate bar module shown, as seen in the figure, that is to say essentially on the side of the grate bar module which contains the knife edge 575.
  • Figure 11 shows an embodiment, which is derived from Figure 4.1 of EP-A-419 415, with two separating blades and three guide elements instead of grate bar modules.
  • the fiber wadding to be cleaned is moved in the direction of the bold arrows through the cleaning stage.
  • the wadding which was already exposed to the centrifugal force before this cleaning stage and in which the dirt particles were concentrated in the outer zone, is first carried out under a guide element 580.
  • 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.
  • the guide element is followed by a separating blade 581 in the direction of transport of the fibers.
  • the cotton wool is passed under this separating blade and is thereby separated into a fiber and a dirt fraction.
  • the separating blade 581 is followed in the transport direction by a second guide element 582, a second separating blade 583 and then a third guide element 584.
  • FIG. 11 also shows three levers 584, 585 and 586, with the aid of which the three distances can be set by means of a motor drive. If the lever 584 is moved around a pivot point B, as indicated by the dot-dash line in the diagram, the entire device moves away from the impact circle, that is to say pv and p5 increase to the same extent. The drawn position of lever 584 and separating blades 581 and 583 is the position closest to the impact circle.
  • FIGS. 9 to 11 all work according to the known principle, according to which the fiber stream is moved along a curved path, while material is separated from the (radially) outer layers in order to be separated.
  • the degree of opening can be adapted to the cleaning function, so that the contaminants can "migrate" radially outwards, so that contaminants tend to be separated off rather than good fibers.
  • the fiber stream After the fiber stream has left these separating elements, it can be discharged directly into the lower shaft. It is not necessary to process it further (e.g. to a sieve drum) or to transport it - such steps (with the increased degree of opening caused by the fine cleaner) would lead to the formation of nits.
  • dedusting can take place wherever transport air exits the system, e.g. at the entrance of the coarse cleaner 4, as described in connection with FIG. 4, but also in the upper shaft part 31 (cf. sieve drum 405, FIG. 9, or 503, FIG. 10). It is therefore not necessary to carry out a dedusting step after the opening roller 33, ie the fiber stream can, as previously mentioned, be passed on directly from the opening roller 33 to the lower part of the shaft.
  • This statement also applies to the use of the preparation system in connection with a spinning process (for example rotor spinning) which is particularly sensitive to dust or Finer trash particles react
  • a spinning preparation plant with a dedusting machine cf. US-B-4637096
  • the cleaning device in the filling shaft comprises a single opening roller 33.
  • cleaning devices for example DE 4039773
  • a single drum roller ie a plurality of rollers each provided with a clothing, each roller being provided with at least one element
  • Such "multi-roller cleaners” can also be used in a “cleaner shaft” according to this invention, but do not offer any significant advantages compared to the single roller variant according to the preferred solution.
  • FIG. 12 schematically shows a feed shaft 8 with a cleaning module RM according to this invention, for example according to one of FIGS. 9, 10 and 11.
  • the lower part 34 of the shaft forms a fiber wadding W, from which fibers are fed to a licker-in V by means of a feed roller SW and feed trough SM to get promoted.
  • Several lashers can be provided, as indicated by dashed circles V2 and V3.
  • the reference symbol VM indicates a drive motor which is provided for the licker-in V (and possibly for the additional licker-in V2, V3).
  • VA indicates a separating element in the licker-in module and the box VAS schematically represents an actuator system for setting the element VA in relation to the licker-in.
  • the licker V together with the separating element also forms an opening and cleaning device or a cleaning unit.
  • Various units are known which can fulfill the required function, see e.g. DE 40 39 773 and EP 618 318.
  • the cleaning module RM in the shaft 8 and the cleaning unit in the card inlet can now both be linked to the card controller 120 (see also FIG. 1), so that they can be adjusted together or individually.
  • the setting can e.g. B. according to EP-B-452 676 (or US-5,181,195).
  • the invention according to the present application can also be combined with the invention according to EP 97820279.8 from April 4, 1997.
  • the content of EP 97810179.8 is therefore hereby integrated in the present application.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP97810278A 1996-05-20 1997-05-05 Installation pour le traitement de fibres Expired - Lifetime EP0810309B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CH126496 1996-05-20
CH1264/96 1996-05-20
CH126496 1996-05-20
DE1996130018 DE19630018A1 (de) 1996-07-25 1996-07-25 Anlage zum Verarbeiten von Fasern
DE19630018 1996-07-25

Publications (2)

Publication Number Publication Date
EP0810309A1 true EP0810309A1 (fr) 1997-12-03
EP0810309B1 EP0810309B1 (fr) 2004-09-29

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US (1) US6212737B1 (fr)
EP (1) EP0810309B1 (fr)
DE (1) DE59711965D1 (fr)
TR (1) TR199700393A2 (fr)

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CN101864621A (zh) * 2010-07-22 2010-10-20 天津滨海大田纺织有限公司 清梳联合机
CN109280999A (zh) * 2018-10-16 2019-01-29 宜城市天舒纺织有限公司 一种带有高效除尘机构的梳棉机
CN110331483A (zh) * 2019-06-27 2019-10-15 武汉裕大华纺织服装集团有限公司 一种全流程智能纺纱生产线
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US6029317A (en) * 1997-04-22 2000-02-29 Maschinenfabrik Rieter Ag Spinning preparation device
EP0894878A3 (fr) * 1997-07-30 2000-04-19 Maschinenfabrik Rieter Ag Nettoyeur de flocons
EP0894878A2 (fr) * 1997-07-30 1999-02-03 Maschinenfabrik Rieter Ag Nettoyeur de flocons
US6185787B1 (en) 1997-07-30 2001-02-13 Maschinenfabrik Rieter Ag Fiber flock cleaner
US6145166A (en) * 1997-07-30 2000-11-14 Maschinenfabrik Rieter Ag Trash elimination apparatuses for fiber cleaning aggregates
US6197080B1 (en) 1998-02-19 2001-03-06 TRüTZSCHLER GMBH & CO. KG Apparatus for separating fiber material from an air stream
DE19806891A1 (de) * 1998-02-19 1999-08-26 Truetzschler Gmbh & Co Kg Vorrichtung in der Spinnereivorbereitung zum Abscheiden und Beschicken von Fasermaterial, z. B. Baumwolle und dgl. zu einer Verarbeitungsmaschine
FR2779745A1 (fr) * 1998-06-12 1999-12-17 Truetzschler Gmbh & Co Kg Dispositif sur une machine de filature pour la production et la regulation d'un voile de flocons de fibres, par exemple a partir de coton, de fibres chimiques
FR2779744A1 (fr) * 1998-06-12 1999-12-17 Truetzschler Gmbh & Co Kg Dispositif sur une machine de filature pour la production d'un voile de flocons de fibres, par exemple a partir de coton, de fibres chimiques
EP0989213B2 (fr) † 1998-09-04 2006-03-29 Maschinenfabrik Rieter Ag Machine de cardage respectivement machine de cardage dite laine
US6421883B1 (en) 1999-11-24 2002-07-23 Maschinenfabrik Rieter Ag Selective cleaning line
CN101864621A (zh) * 2010-07-22 2010-10-20 天津滨海大田纺织有限公司 清梳联合机
CN109280999A (zh) * 2018-10-16 2019-01-29 宜城市天舒纺织有限公司 一种带有高效除尘机构的梳棉机
CN109280999B (zh) * 2018-10-16 2021-04-20 宜城市天舒纺织有限公司 一种带有除尘机构的梳棉机
CN110331483A (zh) * 2019-06-27 2019-10-15 武汉裕大华纺织服装集团有限公司 一种全流程智能纺纱生产线
CN116815367A (zh) * 2023-08-28 2023-09-29 常州虹纬纺织有限公司 一种竹节纱加热器用清理装置及其工作方法
CN116815367B (zh) * 2023-08-28 2023-12-08 常州虹纬纺织有限公司 一种竹节纱加热器用清理装置及其工作方法

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TR199700393A3 (tr) 1997-12-21
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EP0810309B1 (fr) 2004-09-29
US6212737B1 (en) 2001-04-10

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