EP0235093B1 - Vorrichtung zur automatischen Regelung der Materialspannung auf der Trommel einer Kratz- und Florlegemaschine - Google Patents

Vorrichtung zur automatischen Regelung der Materialspannung auf der Trommel einer Kratz- und Florlegemaschine Download PDF

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Publication number
EP0235093B1
EP0235093B1 EP87830025A EP87830025A EP0235093B1 EP 0235093 B1 EP0235093 B1 EP 0235093B1 EP 87830025 A EP87830025 A EP 87830025A EP 87830025 A EP87830025 A EP 87830025A EP 0235093 B1 EP0235093 B1 EP 0235093B1
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EP
European Patent Office
Prior art keywords
variable speed
speed drive
nap
controlling
carding
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.)
Expired - Lifetime
Application number
EP87830025A
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English (en)
French (fr)
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EP0235093A1 (de
Inventor
Emanuele Crosta
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MARIO CROSTA Srl
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MARIO CROSTA Srl
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Publication date
Application filed by MARIO CROSTA Srl filed Critical MARIO CROSTA Srl
Priority to AT87830025T priority Critical patent/ATE55624T1/de
Publication of EP0235093A1 publication Critical patent/EP0235093A1/de
Application granted granted Critical
Publication of EP0235093B1 publication Critical patent/EP0235093B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C11/00—Teasing, napping or otherwise roughening or raising pile of textile fabrics
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/36—Driving or speed control arrangements

Definitions

  • the present invention relates to automatic apparatus for controlling the tension of fabric on the barrel of a carding and napping machine.
  • a problem which currently creates limitations and conditions on the carding and napping action which can be effected by carding and napping machines is that caused by variations in the tension of the fabric which is not easily controllable.
  • a further disadvantage is constituted by the fact that the fabric is not infrequently caught by the carding cylinders, with the possibility of breakage of the fabric which often happens and which involves serious and troublesome downtime.
  • the object of the present invention is that of eliminating the above indicated disadvantages by providing apparatus for the automatic, continuous and constant control of the tension of the fabric on the barrel of a carding and napping machine, which makes it possible to vary the carding effect with or against the nap by maintaining the tension of the fabric constant between arrival at and departure from the barrel, so that a wider range of working options are available whilst the fabric is on the barrel.
  • apparatus for automatic control of the tension of the fabric on the barrel of a napping and carding machine characterised by the fact that it comprises a first electronic control unit for controlling the speed of a variable speed drive for supplying the fabric onto the barrel, a second electronic control unit for controlling the torque of an output variable speed drive for drawing the fabric off the barrel, the said two variable speed drives being electrically connected together, the speed of the output variable speed drive being governed by the input variable speed drive by means of a tachometric generator driven to rotate by the input variable speed drive.
  • a particular advantage of the present invention is that it provides apparatus which is capable of adjustment and voridtion wirn rM D ld response ponso times to all the variations of the carding parameters, with consequent considerable economic advantages for the user.
  • Another advantage of the present invention is that it provides apparatus which, whilst having considerably improved characteristics, is mechanically simplified.
  • the apparatus of the present invention thus makes it possible to avoid damage to the fabric during adjustment or variation and reduces, in a significant manner, the wear on the gaskets of the carding cylinders.
  • Another advantage of the present invention is that it provides apparatus which will give the possibility of synchronising composite lines of several machines, thereby making the installation simpler and more functional.
  • the carding machine has a barrel 1 supporting, in a known way, a plurality of carding cylinders 60, over which passes a fabric 2 delivered to the barrel by an input cylinder 3 and drawn off it by an output cylinder 4, which introduces the fabric to an upper cylinder 5 from which the fabric then passes to a folding cylinder 6.
  • the apparatus for monitoring and controlling the operation of the carding machine is shown schematically in Figure 2 and includes an electronic unit 10 for controlling the speed of the input cylinder, which is driven by a variable speed drive, in order to control the speed at which the fabric is supplied to the barrel.
  • the control unit 10 has a central unit 11, connected to a first potentiometer 12, which controls the motor 13 of the variable speed drive to determine the speed at which the fabric is supplied to the barrel 1; this supply speed is detected by a digital instrument 14 ( Figure 8).
  • the output of a tachometric generator 15, mounted for rotation with the axis of the barrel 1, is connected to the central unit 1 for synchronisation as will be described below.
  • Another tachometric generator 16 is connected for rotation with the motor 13 of the variable speed drive, and its output is also fed to the first central unit 11.
  • This second control unit 20 which acts to control the torque of an output variable speed drive 24 which drives the output cylinder 4.
  • This second control unit 20 has a second central unit 21 connected to a second potentiometer 22 by means of which the maximum working tension detectable by a digital instrument 23 to be set in such a way as to set the maximum torque provided by a motor 24 driving the output variable speed drive which is connected.
  • a further tachometric generator 25 is connected for rotation with the motor 24 and its output is fed to the central unit 21.
  • variable speed drive motors 13 and 24 which are connected to the input cylinder 3 and to the output cylinder 4, respectively, are connected together electrically.
  • the speed of the variable speed drive motor 24 is piloted by the variable speed drive motor 13 by means of the tachometric generator 16 which is incorporated in the variable speed drive itself, and which controls the tension of the fabric by increasing or reducing its speed of rotation. This automatically compensates for elongation of the fabric, governed by the fabric itself, as a function of the set percentage tension by making use of the characteristics of the constant torque variable speed drive.
  • variable speed drive motor 13 the speed of which is set by the potentiometer 12 is not driven by the variable speed motor 24 which works under torque.
  • variable speed drive motors are provided with electronically controlled brakes which, in the specific embodiment, prevent the variable speed drive motor 13 from being able to rotate at a speed greater than the set speed.
  • the apparatus further includes a third electronic unit 30 for controlling the upper cylinder 5, which is constituted by a third central unit 31 generated by a third potentiometer 32 which performs the actuation and governing of a variable speed drive motor 33 which drives the upper cylinder 35, and the speed of which in turn is governed by a third tachometric generator 34 mounted for rotation therewith.
  • a third electronic unit 30 for controlling the upper cylinder 5 which is constituted by a third central unit 31 generated by a third potentiometer 32 which performs the actuation and governing of a variable speed drive motor 33 which drives the upper cylinder 35, and the speed of which in turn is governed by a third tachometric generator 34 mounted for rotation therewith.
  • a fourth electronic unit 40 is also provided, this being constituted by a fourth central unit 40 which is governed by a fourth potentiometer 42 which controls a fourth variable speed drive motor 43 for control of the folding cylinder 6, which motor is also governed by a fourth tachometric generator 44 mounted for rotation with the motor 43 itself.
  • a control unit for controlling the rotation of the carding cylinders 60 This is constituted by three separate central units, namely a first carding control unit 50 which will be referred to hereinafter as a "no-carding" control unit, an electronic regulator 51 for controlling the speed of the carding cylinders which work with the nap (that is they rotate so that they brush the fabric in the direction of the nap), which is controlled by a potentiometer 52 for setting the desired speed of these cylinders, which controls a variable speed drive 53 which, as schematically illustrated in Figure 7, drives those cylinders 60 of the drum which rotate in the direction of the nap.
  • variable speed drive 53 drives a tachometric generator 54 ( Figure 2) the output of which is fed to the control unit 51 as a feedback signal.
  • the unit 51 thus controls the electrical feed to the motor 53 in dependence on the input signals received from the potentiometer 52, the control unit 50 and the central unit 11, and the feedback signal from the tachogenerator 54.
  • an electronic regulator 55 which controls the speed of a motor 57 which drives the carding cylinders working against the nap; the demand speed of this motor 57 is set by a potentiometer 56 and it drives a tachogenerator 58 the electrical output from which is fed to the control unit 55.
  • the fabric 2 is caused to move around the barrel by the motion of the carding cylinders 60, as well as the fabric transport cylinders 3 and 4, and the carding cylinders 60 may all rotate in the same direction (those working against the nap merely being driven at a slower speed) or the carding cylinders 60 working against the nap may even be rotated in the opposite direction from those working with the nap.
  • variable speed input drive cylinder 13 sometimes acts as a drive, whilst at other times it serves as a brake, maintaining the fabric always perfectly stretched over the barrel.
  • the apparatus makes it possible to be able to perform optimum working automatically without any necessity for monitoring or intervention by the operator.
  • the operator need only set the potentiometers for determining the nominal settings of the motors driving the carding cylinders working with and against the nap and the carding will proceed without the possibility of error, seeing that the tensions on the barrel at the output and input will be automatically compensated.
  • the control of the tension effected by means of the tachometric generators avoids slackening of the fabric and prevents it from becoming hooked up.
  • Another advantage which the apparatus according to the invention offers is the possibility of obtaining a napped result by brushing in only one direction, even on a carder having carder cylinders mounted so as to work with the nap and against the nap. This is achieved by the fact that it is possible to drive only the carder cylinders which work against the nap whilst the cylinders which work in the direction of the nap are allowed to be freely rotatable on the barrel.
  • the carder cylinders working in the direction of the nap can be driven by the fabric itself, conferring thereto a particularly effective treatment and degree of filling of the down on the fabric, which thus avoids the need for clipping.
  • the carder cylinders working against the nap can be allowed to rotate freely and work can proceed onlywith the carder cylinders which work in the direction of the nap. This result is only possible, however, because of the constanttension control exerted ofthefabric on the carder barrel by the feed and draw-off rollers 3 and 4.
  • variable speed drive motors 53 and 57 which drive the carding cylinders working with and against the nap work at a constant torque and can be made freely rotatable.
  • the motor 53 drives a belt 70 passing over a pulley 71 of a transmission unit 73 the output pulley 72 from which drives a belt 74 passing over a pulley 75 which is fixed to a pulley 82 which drives a belt 76 engaging all the cylinders 60 which work with the nap.
  • a similar drive train from the motor 57 leads via a belt 77, a pulley 78 of a transmission unit 80 to a pulley 79 driving a belt 81.
  • This belt drives a pulley (not shown) coaxial with the pulley 75 and obscured by it in Figure 7, which in turn drives a pulley corresponding to the pulley 82 to drive a further belt (not shown) likethe belt76 which engages all the cylinders 60 which work against the nap.
  • the intervention times necessary to put the carding cylinders working with the nap or against the nap into their freely rotatable state, or else to put all the cylinders, both those working with the nap and those working against the nap into their freely rotatable state, can be effected in real time with response times of less than a tenth of a second.
  • variable speed drives having electronic controls allows apparatus for control of the working with the nap and againstthe nap to be obtained which gives the possibility of interrupting the carding effect instantaneously, putting the variable speed drives 53 and 57 which control the carding cylinders working with and against the nap, into a freely rotatable condition and renewing the carding, again instantly, without having to stop the machine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Soil Working Implements (AREA)
  • Looms (AREA)

Claims (9)

1. Vorrichtung zur automatischen Regelung der Materialspannung auf der Trommel einer Kratz-und Florlegemaschine, dadurch gekennzeichnet, daß sie, zur Drehzahlregelung eines verstellbaren Drehzahlantriebs (13) für den Vorschub des Stoff (2) auf die Trommel, eine erste elektronische Regelungseinheit (10) und, zur Torsionregelung eines verstellbaren Austrittdrehzahlantriebs (24) für das Stoffherausziehen aus die Trommel, eine zweite elektronische Regelungseinheit (20) einschließt wobei diese zweien verstellbaren Drehzahlantriebe (13, 24) elektrisch zusammenge-schaltet sind und die Drehzahl des verstellbaren Austrittdrehzahlantriebs (24) mittels eines durch den Eintrittdrehzahlantrieb (13) getriebenen Tachogenerators (16) aus dem Eintrittdrehzahlantrieb (13) gesteuert wird.
2. Regelungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die erste elektronische Einheit (10) eine erste Zentraleinheit (11) verseht, die, zur Regelung des eine Materialeintrittrolle (3) treibenden verstellbaren Drehzahlantriebs (13), aus einem ersten Potentiometer (12) gesteuert ist, wobei ein erster Tachogenerator (16) mit dem verstellbaren Eintrittdrehzahlantrieb (13) geschaltet ist und einer Hilfstachogenerator (15) zur Synchronschaltung des Antriebsmotors (13) vorgesehen ist.
3. Regelungsvorrichtung nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, daß die obengenannte zweite elektronische Einheit (20) zur Torsionregelung des verstellbaren Austrittdrehzahlantriebs (24) eine zweite Zentraleinheit (21) verseht, wobei mit dieser einen zweite Potentiometer (22) zur Bestimmung der Nenndrehzahl des verstellbaren Austrittdrehzahlantriebs (24) und einen mit dem verstellbaren Austrittdrehzahlantrieb getriebene Tachogenerator (25) geschaltet sind.
4. Regelungsvorrichtung nach einer oder mehreren vorhergehenden Ansprüchen, dadurch gekennzeichnet, daß sie, zur Regelung einer oberen Stoffherausziehungsrolle (5) eine dritte elektronische Einheit (30) einschließt, wobei diese dritte elektronische Einheit (30) eine dritte Zentraleinheit (31) verseht, die, zur Regelung der Drehzahl eines verstellbaren Drehzahlantriebs (33) der oberen Rolle (5), ein Signal aus einem dritten Potentiometer (32) empfängt, wobei ein dritter Tachogenerator (34) mit dem verstellbaren Drehzahlantrieb (33) der oberen Rolle getrieben wird.
5. Regelungsvorrichtung nach jeden vorhergehenden Ansprüchen, dadurch gekennzeichnet, daß sie eine vierte elektronische Einheit (40) einschließt, die eine vierte Zentraleinheit (41) verseht, die zur Regelung eines verstellbaren Drehzahlantriebs (43) einer Faltenrolle (6) ein Signal aus einem vierten Potentiometer (42) empfängt, wobei ein vierter Tachogenerator mit dem Antrieb der Faltenrolle (43) getrieben wird.
6. Regelungsvorrichtung nach jeden vorhergehenden Ansprüchen, dadurch gekennzeichnet, daß zwischen der ersten und zweiten elektronischen Regelungseinheit (10, 20) eine Einheit (50, 51, 55) zur Drehungsregelung der mit und gegen dem Aufrauhen wirkenden Kratzrollen (60) geschaltet ist.
7. Regelungsvorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die obengenannte elektronische Regelungseinheit (50, 51, 55) für die mit und gegen den Aufrauhen wirkenden Kratzrollen einen automatische Null-Florbildungsregler (50) einschließt.
8. Regelungsvorrichtung nach Anspruch 6 oder Anspruch 7, dadurch gekennzeichnet, daß die elektronische Regelungseinheit (50, 51, 55) für die Kratzrollen, einen elektronische Zentralregler (51) zur Regelung der Drehzahl der mit dem Aufrauhen wirkenden Kratzrollen und einen Potentiometer (52) zur Bestimmung der Nenndrehzahl der mit dem Aufrauhen wirkenden Kratzrollen einschließt, wobei, gemäß der Einstellung des Potentiometers (52) und einem Rücksignal aus einem Tachogenerator (54), der mit dem obengenannten verstellbaren Drehzahlantrieb zur Regelung der mit dem Aufrauhen wirkenden Kratzrollen drehgeschaltet ist, der obige elektronische Zentralregler (51) die Drehzahl eines für die mit dem Aufrauhen wirkenden Kratzrollen verstellbaren Drehzahlantriebs (53) reguliert.
9. Regelungsvorrichtung nach jeden vorhergehenden Ansprüchen, dadurch gekennzeichnet, daß die obengenannte elektronische Regelungseinheit (50, 51, 55) für die Kratzrollen, einen übrige eletronische Regler (55) zur Regelung der Drehzahl der gegen dem Aufrauhen wirkenden Kratzrolen und einen potentiometer (56) zur Bestimmung der Nenndrehzahl der gegen dem Aufrauhen wirkenden Kratzrollen einschließt, wobei dieser übrige elektronische Regler (55), gemäß der Einstellung des Potentiometers (56) und einem Rücksignal aus einem Tachogenerator (58), der mit dem obengenannten übrigen verstellbaren Drehzahlantrieb (57) zur Regelung der gegen dem Aufrauhen wirkenden Kratzrollen drehgeschaltet ist, die Drehzahl eines übrigen für die gegen dem Aufrauhen wirkenden Kratzrollen verstellbaren Drehzahlantriebs (57) reguliert.
EP87830025A 1986-02-14 1987-01-21 Vorrichtung zur automatischen Regelung der Materialspannung auf der Trommel einer Kratz- und Florlegemaschine Expired - Lifetime EP0235093B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87830025T ATE55624T1 (de) 1986-02-14 1987-01-21 Vorrichtung zur automatischen regelung der materialspannung auf der trommel einer kratzund florlegemaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT19413/86A IT1188384B (it) 1986-02-14 1986-02-14 Apparecchiatura per il controllo automatico costante e continuo delle tensione del tessuto sulla botte di macchine garzatrici e felpatrici
IT1941386 1986-02-14

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Publication Number Publication Date
EP0235093A1 EP0235093A1 (de) 1987-09-02
EP0235093B1 true EP0235093B1 (de) 1990-08-16

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EP87830025A Expired - Lifetime EP0235093B1 (de) 1986-02-14 1987-01-21 Vorrichtung zur automatischen Regelung der Materialspannung auf der Trommel einer Kratz- und Florlegemaschine

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EP (1) EP0235093B1 (de)
AT (1) ATE55624T1 (de)
DE (1) DE3764282D1 (de)
IT (1) IT1188384B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1227244B (it) * 1987-10-12 1991-03-27 Monforts Gmbh & Co A Impianto di finissaggio e ritiro.
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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2506345B1 (fr) * 1981-05-20 1988-06-24 Truetzschler Gmbh & Co Kg Dispositif de commande et de regulation d'une carde
DE3237864C2 (de) * 1982-10-13 1996-05-23 Truetzschler Gmbh & Co Kg Verfahren und Vorrichtung zum Steuern und Regeln einer Spinnereivorbereitungsanlage
DD224626A1 (de) * 1984-05-22 1985-07-10 Textima Veb K Antriebssystem fuer deckelkarden oder krempeln

Also Published As

Publication number Publication date
IT1188384B (it) 1988-01-07
IT8619413A0 (it) 1986-02-14
ATE55624T1 (de) 1990-09-15
EP0235093A1 (de) 1987-09-02
IT8619413A1 (it) 1987-08-14
DE3764282D1 (de) 1990-09-20

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