EP2867392A1 - Verfahren und vorrichtung zur regelung der faserzufuhr zu einer karde - Google Patents
Verfahren und vorrichtung zur regelung der faserzufuhr zu einer kardeInfo
- Publication number
- EP2867392A1 EP2867392A1 EP13736631.6A EP13736631A EP2867392A1 EP 2867392 A1 EP2867392 A1 EP 2867392A1 EP 13736631 A EP13736631 A EP 13736631A EP 2867392 A1 EP2867392 A1 EP 2867392A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- lower shaft
- weight
- card
- cotton
- 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
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000009960 carding Methods 0.000 title abstract description 12
- 229920000742 Cotton Polymers 0.000 claims description 57
- 238000005259 measurement Methods 0.000 claims description 12
- 238000012937 correction Methods 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 244000144992 flock Species 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 description 7
- 238000004260 weight control Methods 0.000 description 7
- 239000002657 fibrous material Substances 0.000 description 5
- 239000010813 municipal solid waste Substances 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 230000032258 transport Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- D01G23/04—Hoppers; Delivery shoots with means for controlling the feed
-
- 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
- D01G23/06—Arrangements in which a machine or apparatus is regulated in response to changes in the volume or weight of fibres fed, e.g. piano motions
Definitions
- the invention relates to a method and a device for controlling the fiber supply to a card.
- Cards are used in spinning preparation and serve the dissolution of the fiber material in individual fibers and their parallelization and purification of impurities.
- the carding machine produces a card sliver from the fiber material which is subsequently processed into a yarn. Instead of a card sliver, however, it is also possible to produce a nonwoven. Subsequently, a nonwoven produced with a carding machine is equivalent to a card sliver.
- a card is usually associated with a hopper which is supplied by a conveyor system with fibers from the blow room. The fibers are transported in the form of fiber flakes.
- the fiber flakes are introduced in the form of a cotton wool in the card
- the uniformity of the incoming into the carding cotton plays an important role in terms of the life of the working elements of the card and the requirements for carding. Also, the uniformity of the tape or web produced by the card is affected by the uniformity of the wadding entering the card.
- Another important technological factor in the carding process is the weight of the wadding entering the card. The size of the cotton weight and the entry speed of the cotton into the card essentially determine the production quantity of a card. The cotton weight influences the carding quality significantly.
- the hopper is divided into an upper shaft and a lower shaft.
- the upper shaft is filled with fiber flakes from a transport system continuously or demand-controlled. In most cases, pneumatic transport systems are used.
- the fiber flakes are brought with a feeding device in the lower shaft. If the filling shaft is now fed with fiber flakes via a pneumatic fluff feed, the fiber flakes move evenly from the upper shaft into the lower shaft thanks to the feed device, regardless of the uniformity of the delivery of flakes into the upper shaft. In this way, a decoupling system of the upper shaft and the lower shaft. Uneven filling of the upper shaft as well as by the transport air caused pressure fluctuations in the upper shaft can have a small but disturbing influence on the conditions in the lower shaft. In the lower part of the hopper, in the lower shaft, a homogenous wadding pattern is created, which is suitable for the feeding of the card.
- Modern, two-part filling shafts very often also contain an opening roller in addition to the aforementioned feed device.
- This opening roller is immediately downstream of the feed device of the hopper, whereby the fiber flakes are additionally opened and homogenized.
- a fan is also belonging to the lower shaft which allows an increase in pressure in the lower shaft.
- a disadvantage of the device is that the pressure setpoint is adjusted due to the predetermined level.
- a change in the size of the batting weight, ie the compression, is possible in this case only by changing the level or by changing the amount and pressure of the incoming air.
- a change in the degree of dissolution causes a change in the weight of the cotton, the degree of dissolution is usually dictated by technological requirements.
- the object of the invention is therefore to provide a method for controlling the fiber supply to a card, which allows a direct control of the cotton weight, regardless of the resolution of the fiber flakes and independent of the product column in the lower shaft.
- the hopper is divided into an upper shaft and a lower shaft.
- fiber flakes are fed.
- the fiber flakes are transported with a feed device in the lower shaft.
- air is fed via a fan, which leads to an increase in pressure over the fiber flakes.
- the injected air is removed via an air-permeable wall from the lower shaft and fed back to the fan. Since such air circulation can not be lossless, the fan corresponding air supply openings are provided.
- the fiber flakes are compacted in the lower shaft under a certain pressure to a cotton wool with a certain cotton weight. The pressure is regulated by the feed device.
- a higher level is achieved in the lower shaft, which results in parts of the air-permeable wall being covered, which in turn results in an increase in the pressure in the lower shaft.
- It is specified a desired value for the cotton weight which is assigned a target pressure for the lower shaft.
- the cotton wool reference is determined based on the processual experience of processing a particular fiber in relation to the amount of production intended.
- this setpoint for the cotton weight of the machine control is entered via an input device.
- the machine control assigns a corresponding desired value for the pressure to the entered desired value for the cotton weight.
- corresponding values for the pressure in the lower shaft are stored in the machine control or are calculated by appropriate algorithms. The algorithms used are generally based on experience.
- the pressure in the lower shaft is now regulated by the setpoint via the feed device. If the setpoint for the pressure is undershot, there is an increase in the feeding of fiber flakes into the lower shaft and vice versa. If the pressure control has reached a certain stability, an actual value for the weight of the water is determined. The determination of the actual value of the cotton weight is carried out by a calculation of the weight of the produced card sliver or fleece, a total delay of the card and a separated leaving quantity. Due to a subsequent desired-actual-value comparison of the cotton weight, a correction of the desired value for the pressure in the lower shaft is made.
- the pressure in the lower shaft can be influenced by a regulation of the fan.
- the regulation of the pressure in the lower shaft on the basis of the specified value is additionally carried out with the aid of the fan.
- the pressure generated in the lower shaft is influenced.
- the actual regulation of the pressure has to be done in this case in a combination of the regulations of the supply and the fan.
- a further adjusting means for example in the form of a valve or slide, which are discharged from the lower shaft and recirculated to the fan circulating air can be used to influence the pressure in the lower shaft.
- the wadding entering the card is subsequently opened by the card, cleaned and dissolved in individual fibers.
- the individual fibers are parallelized and leave the card in the form of a fleece or card sliver.
- the cotton wool is pulled apart so that the produced card sliver leaves the carding machine at a higher exit speed than the entry speed of the cotton wool into the carding machine.
- This process is called delay.
- Such a delay occurs over several arranged in the carding rollers.
- the occurring individual delays from roller to roller can be added together in a so-called total delay of the card. Due to the operating state of a card whose total delay is known and is determined by the machine control itself.
- the total delay of a card corresponds to the ratio of the delivery speed of the card sliver or fleece Ses to the inlet speed of the cotton, which in turn correspond to the ratio of the peripheral speeds of the feed roller and outlet roller.
- the machine control system determines the speed of the motors from the control values output to the corresponding motors and, correspondingly, the peripheral speeds of the rollers driven by the motors.
- Other means for determining the inlet velocity or the outlet velocity are, for example, speed measurements of the rollers or shafts.
- the output quantity can be determined via an outgoing function depending on the production quantity. The determination of the outgoing function is usually carried out for a machine type and a fiber product to be processed once by an empirical measurement of the amount of waste at different production ratios and different fiber material.
- the measurement of the strip weight at the card outlet is known from the prior art and takes place, for example, via the measurement of a disc roller distance.
- the belt is guided between two disk rollers, wherein the axial distance of the disk rollers is variable and is determined by the thickness of the belt. This can be due to the center distance of the disc rollers close to the weight of the band.
- Further known measuring methods are microwave measurement, capacitive measurement, tactile finger measurement or step roller measurement for the measurement of a strip or radiometric measuring systems for the measurement of a nonwoven.
- the controller has an input means for inputting a target value for the cotton weight.
- input means keyboards, touch screens, preselection buttons or similar means may be provided.
- the control tion is connected to measuring means for determining an actual value for the cotton weight.
- the measuring means for determining the actual value for the cotton weight preferably comprise measuring means for measuring a strip weight at the card discharge and means for determining an entry speed and an exit speed of the card.
- adjusting means are provided for influencing the pressure in the lower shaft, which serve to regulate the pressure in the lower shaft.
- the adjusting means for influencing the pressure is a feeding device, which is arranged between the upper shaft and the lower shaft.
- the feed device comprises a feed trough and a feed roll. To change the supply, the speed of the feed roller is changed. This changes the flow of flock from the upper shaft into the lower shaft.
- a suction is provided at certain points to eliminate trash.
- the circulating air that flows through the air-permeable wall transports small amounts of impurities, known as trash, from the lower shaft into the air duct. Due to the construction of the air ducts and the resulting currents, this trash settles in the duct system.
- an extraction system is provided. This extraction again influences the pressure in the lower shaft and has to be considered accordingly in the machine control for the control of the cotton weight.
- FIG. 1 Schematic representation of a card with hopper
- FIG. 2 Schematic representation of the control of the cotton weight
- FIG. 1 shows a revolving flat card provided with a filling shaft 9.
- Fiber flakes 18 pass through the various process stages of the fettling shop into the upper shaft 1 of the filling shaft 9.
- the fiber flakes 18 are conveyed by the feed device 19, comprising a feed trough 2 and a feed roll 3, passed on to an opening roller 4, which further opens the fiber flakes 18.
- the opening roller 4 releases the further opened fiber flakes 18 into the lower shaft 5.
- the presence of such an opening roller 4 is not necessary for the control of the cotton weight, but has by the refined resolution of the fiber flakes influence on the compression of the fiber flakes at the same pressure in the lower shaft 5.
- a pressure sensor 20 is provided for measuring the currently prevailing pressure
- a blowing device 6 is provided for the further compression of the cotton. This blows more air into the lower shaft 5 and thereby compresses the fiber flakes into a cotton wool with a higher weight of cotton wool. The air blown in by the blowing device 6 flows through the fiber flakes. This air flow 7 leaves the shaft 5 through the air-permeable region 8 of the wall of the lower shaft 5 and is returned to the Eihblasvorraum 6.
- a fan is suitable. The fan guides the air in a circle. The pressure generated by the fan in the lower shaft is dependent on the air permeability of the fiber flakes and the open cross section of the wall 8 of the lower shaft 5. With the help of the suction 21 is removed from the channel system of the depositing Trash.
- a second feed device 10 finally feeds the fiber flakes, now in the form of a homogeneous wadding 11, via a feed line to the licker-in module 12 of the card.
- the wadding inlet takes place at an inlet velocity v.
- the lickerins 2 open the fiber flakes of the wadding template 11 further and at the same time remove some of the contaminants.
- the last licker-in roller finally transfers the fibers to the card drum 13, which completely dissolves and parallelises the fibers.
- the carding drum 13 cooperates with the cover unit 14. After the fibers have partly performed several revolutions on the card drum 13, they are removed from the doffer roller 15, fed to a band-forming unit 16 and finally deposited in the form of a card sliver in a jug (not shown).
- FIG. 2 shows a schematic representation of the control of the cotton weight.
- the setpoint is forwarded to the controller 52 for assignment 41 of the setpoint for the pressure in the lower shaft and the cotton weight control 41.
- the assigned setpoint for the pressure in the lower shaft is fed to the pressure control 42.
- the pressure control 42 is connected to a pressure sensor 20 in the lower shaft, by means of which the actual value of the pressure in the lower shaft is determined.
- a correction is calculated by the pressure control 42 and a corresponding signal to the adjusting means for changing the pressure in the lower shaft, for example, to the feed device 9, output. This process repeats until the setpoint and the actual value of the pressure are within a variation tolerated by the controller. In this condition, the pressure control 42 is in a stable operating condition. The state of stability of the pressure control 42 is forwarded to the cotton weight control 49 via a signal 50.
- the entry speed vi of the lap and the exit speed v2 of the card sliver are fed to the calculation 45 of the delay of the card.
- the calculated total delay of the card is forwarded to the unit 48 for calculating the actual value of the cotton weight.
- the value for the band weight 47 and the quantity 46 are added in the calculation step 48.
- the actual value of the cotton weight determined therefrom is forwarded to the cotton weight control 49.
- a correction 51 of the desired value for the pressure in the lower shaft is calculated by the comparison of the target value for the cotton weight with the actual value of the cotton weight and output by the cotton weight control 49.
- the pressure control 42 will react accordingly. As soon as a stable operating state of the pressure control 42 is reached, the cotton weight control 49 is reactivated and the process is repeated.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Preliminary Treatment Of Fibers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00920/12A CH706658A1 (de) | 2012-06-29 | 2012-06-29 | Verfahren und Vorrichtung zur Regelung der Faserzufuhr zu einer Karde. |
PCT/IB2013/001240 WO2014001867A1 (de) | 2012-06-29 | 2013-06-14 | Verfahren und vorrichtung zur regelung der faserzufuhr zu einer karde |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2867392A1 true EP2867392A1 (de) | 2015-05-06 |
EP2867392B1 EP2867392B1 (de) | 2018-10-10 |
Family
ID=48783289
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13736631.6A Active EP2867392B1 (de) | 2012-06-29 | 2013-06-14 | Verfahren und vorrichtung zur regelung der faserzufuhr zu einer karde |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2867392B1 (de) |
CN (1) | CN104379822B (de) |
CH (1) | CH706658A1 (de) |
WO (1) | WO2014001867A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015106415A1 (de) * | 2014-12-13 | 2016-06-16 | Trützschler GmbH + Co KG Textilmaschinenfabrik | Verfahren und Vorrichtung zum Beschicken einer Anlage mit Fasern |
CH713862A1 (de) * | 2017-06-08 | 2018-12-14 | Rieter Ag Maschf | Druckregelung in einer Flockenspeisung. |
CH714679A1 (de) * | 2018-02-26 | 2019-08-30 | Rieter Ag Maschf | Füllschachtaustrag zur Speisung einer Karde. |
CH714843A1 (de) * | 2018-03-29 | 2019-09-30 | Rieter Ag Maschf | Speisevorrichtung zu einer Karde. |
IT201800005659A1 (it) * | 2018-05-24 | 2019-11-24 | Dispositivo di stiro di un nastro con cardina per sistemi di filatura ad aria, apparato di filatura ad aria e relativo metodo di stiro di un nastro con cardina per sistemi di filatura ad aria | |
CH715076A1 (de) * | 2018-06-07 | 2019-12-13 | Rieter Ag Maschf | Füllstandsmessung eines Faserflockenspeichers. |
CN108754682B (zh) * | 2018-06-20 | 2021-06-15 | 赤峰东荣羊绒发展(集团)有限公司 | 一种纤维梳理机平帘速度与工艺周期的快速调整装置 |
WO2022233773A1 (de) * | 2021-05-04 | 2022-11-10 | Hubert Hergeth | Materialvorlage |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH531576A (de) * | 1969-10-15 | 1972-12-15 | Rieter Ag Maschf | Verfahren zum Erzeugen eines gleichmässigen kontinuierlichen Faserverbandes und Vorrichtung zur Durchführung des Verfahrens |
CH522051A (de) * | 1970-10-05 | 1972-04-30 | Zellweger Uster Ag | Verfahren und Vorrichtung zur Überwachung und/oder Regelung der Speisung von Karden |
CH562889A5 (de) * | 1972-12-05 | 1975-06-13 | Rieter Ag Maschf | |
GB1513743A (en) * | 1974-05-14 | 1978-06-07 | South African Inventions | Apparatus for sensing sliver mass |
DE2658044C3 (de) * | 1976-12-22 | 1980-02-21 | Truetzschler Gmbh & Co Kg, 4050 Moenchengladbach | Verfahren und Vorrichtung zum Erzeugen eines gleichmäßigen Faserbandes |
DE3244619C2 (de) * | 1982-04-01 | 1994-07-07 | Truetzschler Gmbh & Co Kg | Vorrichtung zur Regelung einer aus mehreren Teilbereichen bestehenden Spinnereivorbereitungsanlage |
DE3237864C2 (de) * | 1982-10-13 | 1996-05-23 | Truetzschler Gmbh & Co Kg | Verfahren und Vorrichtung zum Steuern und Regeln einer Spinnereivorbereitungsanlage |
IT8620811A0 (it) * | 1985-09-11 | 1986-06-17 | Monchengladbach Rep Fed German | Dispositivo di regolazione e comando del cilindro introduttore di un dispositivo alimentatore di fiocco. |
DE3617526A1 (de) * | 1986-05-24 | 1987-11-26 | Truetzschler & Co | Verfahren und vorrichtung zum speisen einer anzahl von karden, krempeln o. dgl. |
DE3617525A1 (de) * | 1986-05-24 | 1987-11-26 | Truetzschler & Co | Vorrichtung zur vergleichmaessigung eines kardenbandes oder krempelvlieses |
DE3617527A1 (de) * | 1986-05-24 | 1987-11-26 | Truetzschler & Co | Vorrichtung zum speisen von fasermaterialverarbeitenden maschinen, z.b. karden, krempeln, schlagmaschinen o. dgl. |
DE3913997A1 (de) * | 1989-02-14 | 1990-08-23 | Rieter Ag Maschf | Dosierverfahren und -vorrichtung zur abgabe vorgebbarer mengen von faserflocken |
JP2684429B2 (ja) * | 1989-09-26 | 1997-12-03 | 日本スピンドル製造株式会社 | カードスライバーの斑自動制御装置 |
EP0635589A1 (de) * | 1993-07-21 | 1995-01-25 | Hergeth Hollingsworth Gmbh | Verfahren und Vorrichtung zur Regelung des Flächen- bzw. Bandgewichts des Endproduktes einer faserverarbeitenden Maschine |
DE4412845A1 (de) * | 1994-04-14 | 1995-10-19 | Hartmann Paul Ag | Verfahren und Einrichtung zur Luntenherstellung aus Fasergut |
WO1996011292A2 (en) * | 1994-10-10 | 1996-04-18 | Carding Specialists (Canada) Limited | Card waste monitoring |
EP2251466A3 (de) * | 2007-06-25 | 2011-04-06 | Oskar Dilo Maschinenfabrik KG | Speisevorrichtung für Faserflocken sowie Verfahren zum Zuführen von Faserflocken |
-
2012
- 2012-06-29 CH CH00920/12A patent/CH706658A1/de not_active Application Discontinuation
-
2013
- 2013-06-14 CN CN201380034613.0A patent/CN104379822B/zh active Active
- 2013-06-14 EP EP13736631.6A patent/EP2867392B1/de active Active
- 2013-06-14 WO PCT/IB2013/001240 patent/WO2014001867A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2014001867A1 (de) | 2014-01-03 |
EP2867392B1 (de) | 2018-10-10 |
CH706658A1 (de) | 2013-12-31 |
CN104379822B (zh) | 2016-10-26 |
CN104379822A (zh) | 2015-02-25 |
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