US3852848A - Method of, and apparatus for standardizing slivers - Google Patents

Method of, and apparatus for standardizing slivers Download PDF

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Publication number
US3852848A
US3852848A US00286865A US28686572A US3852848A US 3852848 A US3852848 A US 3852848A US 00286865 A US00286865 A US 00286865A US 28686572 A US28686572 A US 28686572A US 3852848 A US3852848 A US 3852848A
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Prior art keywords
sliver
textile machine
reservoir
cylinders
machine
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US00286865A
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English (en)
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P Feller
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Zellweger Uster AG
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Zellweger Uster AG
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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
    • 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

  • a method and apparatus for standardizing slivers during their formation in a textile machine such as a carding machine including a first regulating unit at the input of the machine for correcting long'term fluctuations in the supply of material and a second regulating unit inside the machine for correcting short-term fluctuations by altering the draft of the sliver, and wherein, in order to keep the sliver deposition unit at a constant level, the difference between the variable rate of the second regulating unit and the rate of travel of the sliver is adjusted by use of a sliver reservoir, the filling level of which is monitored and controlled so that it falls at all times within a predetermined range.
  • This invention relates to a method of, and an-apparatus for, standardizing slivers by suitably regulating their thickness or their weight per unit length during their formation in a textile machine, more particularly a carding machine.
  • the thickness of the sliver produced is measured and the measured value is used to control the quantity of fiber delivered.
  • the thickness of the sliver produced is measured and the measured value regulates the output rate of the sliver delivered in such a way that it is standardized.
  • a regulating arrangement gener ally in the form of a drawing arrangement, is situated at the output end of the textile machine. A measuring element preceding this regulating arrangement measures the thickness of the sliver and controls the draft of the drawing arrangement in such a way that the thickness of the sliver is standardized at the output end.
  • Regulating systems functioningon the basis of the principle embodied in the third system enable short fluctuations to be regularized while those functioningon the basis of the principle embodied in the forth system enable even extremely short fluctuations (a few centimeters in length) to be regularized.
  • the basic disadvantage of these two systems is the variable output rate of the sliver delivered. This calls for a high-performance regulating unit because the sliverdeposition unit (the so called can stock) also has to be driven at this variable rotational speed. Since production also fluctuates with the variable output rate, the capacity of the textile machine cannot be fully utilized, in other words, its efficiency diminishes.
  • the present invention provides a method for standardizing the cross section or weight per unit length of the sliver produced by a textile machine, comprising a first regulating unit at the inlet end of the machine for correcting long-term fluctuations in the supply of material and a second regulating unit inside the machine for correcting short-term fluctuations by altering the draft, wherein, in order to keep the speed of a sliverdeposition unit at a constant level, the difference between the variable input or output rate of the second regulating unit and therate of travel of the sliver is corrected in the following-sectionof the machine through the interposition of sliver reservoir, and the speed differential and/or the filling level of the sliver reservoir, is monitored and, as a result of such monitoring, one or both of the regulating units are influenced in such a way that the average filling level of the sliver reservoir remains constant.
  • the invention also provides an apparatus for standardizing the cross section or weight per unit length of the sliver produced by a textile machine comprising a first regulating unit for correcting long-term fluctuations in the supply of material arranged at the inlet end of the machine and a second regulating unit for correcting short-term fluctuations arranged inside the machine, the said apparatus comprising a sliver reservoir at the side of the second regulating unit, means for monitoring the fillin'g level of the sliver reservoir and for obtaining a signal from such monitoring, and means responsive to the signal for influencing one or both regulating units in such a way that the filling level of the reservoir does not exceed predetermined limits.
  • FIG. 1 is a schematic diagram of a regulating system in a carding machine with a sliver reservoir following the regulating unit at the output end;
  • FIG. 2 is a schematic diagram of a regulating system in a carding machine with a sliver reservoir preceding the regulating units at the output end;
  • FIG. 3 is a detailed schematic view of a sliver reservoir.
  • FIG. I diagrammatically illustrates a carding macontrolled chine consisting of a cylinder 1 which is preceded by a I for example,
  • a drawing arrangement 7 is provided at the output of the carding machine having a rear cylinder 8 which is driven at a constant rotational speed and a front cylinder 9 which is driven at a'variable rotational speed controlled by elements known per se,'which form a regulating means for the sliver.
  • the measuring element 6 can be arranged in front of, inside or behind the drawing arrangement 7.
  • a measurement-induced drive signal, or a manipulated variable, from the regulator 12 controls the rotational speed of the feed roller 3 through an input regulating means, formed by a controller 13 provided with an integrating component which detects the-average deviation and a variable drive 17, in the sense. that, if the output rate of the sliver 14 is too high, the quality of material delivered is reduced andvice-versa. Through the reduction in the quantity of material supplied, a thinner film of fiber is formed at the output end of the carding machine, with the result that the drawing arrangement is switched to a lower draft, i.e., to a lower output per unit of time.
  • a sliver reservoir ll known per se, the filling level of which is monitored at least at one point, by means of a. photocell 15.
  • the filling level of the reservoir 11 can also be continuously measured by other suitable means.
  • the signal obtained from the photocell l5 acts upon the variable drive 10, or is applied to the variable drive 17 by way of a summing junction 25 also connected to controller 13, in the sense that the filling of the sliver reservoir 11 remains within predetermined limits. This can be achieved, for example, by adjusting the relative speeds by a few percent between the front cylinder 9 and the coiling mechanism 16, in such a way that the sliver reservoir 11 is slowly emptied.
  • the photocell l5 responds and increases the rotational speed of the feed roller 3 so that the reservoir is filled again.
  • FIG. 2 differs from that shown in FIG. 1 in that the front cylinder 9 of the drawing arrangement is driven at a constant rotational speed while the rear cylinder 8 is driven at a variable rotational speed.
  • the sliver reservoir 11 is arranged between the' drawing arrangement 8, 9 and the calender rollers 18.
  • FIG. 3 shows an arrangement suitable for this purpose.
  • the deviation fromthe average draft between the drawingcylinders 8 and 9 is integrated by means of a standard differential gear mechanism 19 and adjusts a rocker arm 20 on which rollers 21 and 23 are rotatably mounted.
  • the shaft 24 for one of the cylinders 8 is connected to a bevel gear25 which meshes with bevel gear 26, connected to gear 27 in the differential mechanism 19.
  • the differential gears 28 and 29 mesh with gears 27 and 30, the gear 30 being connected to the bevel gear. 31, which is driven by the shaft 32 for one of the cylinders 9 by way of gears 33, 34 and 35.
  • An output gear 36 is connected to the spider 37 of the differential gear mechanism so that differences in speed between the cylinders 8 and 9 produce rotation of the spider 37, which rotation is transferred via gears 36 and 38 through the bevel gears 39 and 40' to the rocker arm 20.
  • the sliver is guided over the roller 2l, over a fixed roller 22 and over the roller 23 to the can stock 16.
  • the direction of rotation of the rocker arm 20' is selected in such a way that it moves downwards as long as the drawing arrangement 8, 9 is producing more sliver than the can stock 16 is receiving.
  • the sliver delivered in excess is picked up by the increasing length between the rollers. Accordingly, the positionof the arm 20 can be directly used to control the regulated drive 17.
  • a method for standardizing the cross section or weight per unit length of a sliver produced by a textile machine comprising the steps of measuring the supply of material at the outlet of the machine, drafting the material subsequent to the measuring thereof, correctsupply of material at the outlet of the machine, correcting short-term fluctuations in the material at the outlet of the machine in response to the measured supply of material by altering the draft thereof, supplying the sliver at the outlet of the machine to a coiling mechanism, and, in order to keep thespeed of the coiling mechanism at a constant level, adjusting the difference between the variable rate of the short-term correction operation and the rate of travel of the sliver by supplying said sliver to a sliver reservoir prior to delivery to said coiling mechanism, monitoring the filling level of the sliver reservoir and, as a result of such monitoring, controlling at least one of said correcting operations in I such a way that the average filling level of the sliver resing long-term fluctuations in the supply of material at I the in
  • An apparatus for standardizing the cross section or weight per unit length of the sliver produced by a textile machine which includes a feed roller, a main cylinder and a doffer, said apparatus comprising measuring means for measuring the cross section of the sliver at the output of said textile machine, first regulating means responsive to said measuring means for controlling the speed of the feed roller of said textile machine to correct long-term fluctuations in the supply of material received at the inlet end of the textile machine and second regulating means in the form of a drawing arrangement including a rear pair of cylinders connected to said textilemachine to be driven therewith, a front pair of cylinders, and drive means responsive to said measuring means for driving said front pair of cylinders at a variable rate to correct short-term fluctuations in the material received at the outlet of said textile machine, a sliver reservoir receiving the sliver obtained from said second regulating means, detection means for generating a signal representative of the filling level of said sliver reservoir, control means responsive to the signal from said detection means for influencing at least one of said
  • said second regulating means includes means for adjusting the speed of delivery of the sliver by a few percent between said measuring means and said coiling mechanism.
  • said detection means is a photocell for monitoring the filling level of said sliver reservoir.
  • An apparatus for standardizing the cross section or weight per unit length of the sliver produced by a textile machine which includes a feed roller, a main cylinder and a doffer, said apparatus comprising measuring means for measuring the cross section of the sliver at the output of said textile machine, first regulating means responsive to said measuring means for controlling the speed of the feed roller of said textile machine to correct long-term fluctuations in the supply of material received at the inlet end of the textile machine and second regulating means in the form of a drawing arrangement including a rear pair of cylinders connected to said textile machine to be driven therewith, a front pair of cylinders, and drive means responsive to said measuring means for driving said front pair of cylinders at a variable rate to' correct short-term fluctuations in the material received at the outlet of said textile machine, a sliverreservoir receiving the sliver obtained from 'said second regulating means, a coiling mechanism receiving the sliver from said sliver reservoir and being connected to the doffer of said textile machine to be driven at the same

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US00286865A 1971-09-07 1972-09-07 Method of, and apparatus for standardizing slivers Expired - Lifetime US3852848A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1314371A CH541002A (de) 1971-09-07 1971-09-07 Verfahren und Vorrichtung zur Vergleichmässigung von Faserbändern

Publications (1)

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US3852848A true US3852848A (en) 1974-12-10

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US00286865A Expired - Lifetime US3852848A (en) 1971-09-07 1972-09-07 Method of, and apparatus for standardizing slivers

Country Status (8)

Country Link
US (1) US3852848A (xx)
CH (1) CH541002A (xx)
DE (1) DE2220748C3 (xx)
FR (1) FR2152591B1 (xx)
GB (1) GB1393775A (xx)
HK (1) HK57978A (xx)
IT (1) IT962991B (xx)
MY (1) MY7800403A (xx)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977046A (en) * 1974-05-31 1976-08-31 Fiber Controls Corporation Density sensing and controlling equipment
US4199843A (en) * 1977-02-02 1980-04-29 Trutzschler Gmbh & Co. Kg Apparatus for producing a uniform continuous card sliver
US4275483A (en) * 1979-12-05 1981-06-30 Roberson James H Control apparatus for a carding machine
US5377385A (en) * 1990-09-20 1995-01-03 Maschinenfabrik Reiter Ag Draw frame, storage device and coiler, delivery regulation
US6273314B1 (en) 1998-03-17 2001-08-14 Rieter Ingolstadt Spinnereimaschinenbau Ag Process and apparatus for storage of fiber band between operating components of spinning machines
EP3473572A1 (de) * 2017-10-20 2019-04-24 Maschinenfabrik Rieter AG Textilmaschinenverbund mit einer bandspeichereinheit zum zwischenspeichern von faserband
CN110268111A (zh) * 2017-02-09 2019-09-20 特吕茨施勒有限及两合公司 用于加工纤维的方法和设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH627498A5 (de) * 1978-04-26 1982-01-15 Zellweger Uster Ag Verfahren und vorrichtung zur ausregulierung von bandgewichtsschwankungen an karden, krempeln und strecken.
GB2255353B (en) * 1991-05-01 1994-11-30 Hollingsworth On Wheels John D Drive between an autoleveller and a coiler
DE4332329B4 (de) * 1992-11-07 2005-10-20 Truetzschler Gmbh & Co Kg Vorrichtung an einer Karde für Textilfasern, z. B. Baumwolle, Chemiefasern u. dgl., zur Produktionssteuerung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB930873A (en) * 1961-05-02 1963-07-10 Tmm Research Ltd Improvements in methods of and means for processing textile fibrous material
US3403426A (en) * 1966-07-27 1968-10-01 Maremont Corp Textile sliver evening apparatus
US3703023A (en) * 1969-06-24 1972-11-21 Zinser Textilmaschinen Gmbh Apparatus for rendering textile slivers uniform

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB930873A (en) * 1961-05-02 1963-07-10 Tmm Research Ltd Improvements in methods of and means for processing textile fibrous material
US3403426A (en) * 1966-07-27 1968-10-01 Maremont Corp Textile sliver evening apparatus
US3703023A (en) * 1969-06-24 1972-11-21 Zinser Textilmaschinen Gmbh Apparatus for rendering textile slivers uniform

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977046A (en) * 1974-05-31 1976-08-31 Fiber Controls Corporation Density sensing and controlling equipment
US4199843A (en) * 1977-02-02 1980-04-29 Trutzschler Gmbh & Co. Kg Apparatus for producing a uniform continuous card sliver
US4275483A (en) * 1979-12-05 1981-06-30 Roberson James H Control apparatus for a carding machine
US5377385A (en) * 1990-09-20 1995-01-03 Maschinenfabrik Reiter Ag Draw frame, storage device and coiler, delivery regulation
US6273314B1 (en) 1998-03-17 2001-08-14 Rieter Ingolstadt Spinnereimaschinenbau Ag Process and apparatus for storage of fiber band between operating components of spinning machines
CN110268111A (zh) * 2017-02-09 2019-09-20 特吕茨施勒有限及两合公司 用于加工纤维的方法和设备
CN110268111B (zh) * 2017-02-09 2022-06-28 特吕茨施勒集团欧洲公司 用于加工纤维的方法和设备
EP3473572A1 (de) * 2017-10-20 2019-04-24 Maschinenfabrik Rieter AG Textilmaschinenverbund mit einer bandspeichereinheit zum zwischenspeichern von faserband
US20190119833A1 (en) * 2017-10-20 2019-04-25 Maschinenfabrik Rieter Ag Textile machine assembly comprising a sliver storage unit for the interim storage of sliver
US10934126B2 (en) 2017-10-20 2021-03-02 Maschinenfabrik Rieter Ag Textile machine assembly comprising a sliver storage unit for the interim storage of sliver

Also Published As

Publication number Publication date
FR2152591B1 (xx) 1978-06-02
CH541002A (de) 1973-08-31
DE2220748B2 (de) 1977-11-10
MY7800403A (en) 1978-12-31
DE2220748C3 (de) 1981-12-10
HK57978A (en) 1978-10-06
DE2220748A1 (de) 1973-03-22
IT962991B (it) 1973-12-31
FR2152591A1 (xx) 1973-04-27
GB1393775A (en) 1975-05-14

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