EP0453890B1 - Verfahren zur Regelung der Spannung eines Vorgarnes an einer Vorspinnmaschine - Google Patents

Verfahren zur Regelung der Spannung eines Vorgarnes an einer Vorspinnmaschine Download PDF

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Publication number
EP0453890B1
EP0453890B1 EP19910105760 EP91105760A EP0453890B1 EP 0453890 B1 EP0453890 B1 EP 0453890B1 EP 19910105760 EP19910105760 EP 19910105760 EP 91105760 A EP91105760 A EP 91105760A EP 0453890 B1 EP0453890 B1 EP 0453890B1
Authority
EP
European Patent Office
Prior art keywords
roving
roving yarn
tension
speed
actual value
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
EP19910105760
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0453890A1 (de
Inventor
Othmar Bachmann
Peter Anderegg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0453890A1 publication Critical patent/EP0453890A1/de
Application granted granted Critical
Publication of EP0453890B1 publication Critical patent/EP0453890B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/10—Tension devices
    • D01H13/108—Regulating tension by regulating speed of driving mechanisms of unwinding, paying-out, forwarding, winding or depositing devices, e.g. automatically in response to variations in tension
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/32—Counting, measuring, recording or registering devices

Definitions

  • the invention relates to a method for regulating the tension of a roving in the area between the drafting system and the upper wing end of a roving machine according to the preamble of claim 1.
  • both the wing and the spindle are driven, between which there is a certain speed ratio.
  • the roving or the sliver is wound on a smooth sleeve placed on the spindle.
  • the speed of the spindle is reduced, for example by means of a cone-belt gear, in such a way that the winding speed again corresponds to the exit speed of the roving from the drafting device, as a result of which the speed ratio wing / Spindle is changed.
  • This magnitude of the change in speed of the spindle must be determined by several tests for each roving quality.
  • US Pat. No. 4,551,969 shows an upper and lower light barrier, between which the sag of the roving should lie.
  • the disadvantage of this method is that there must always be a sag. As soon as the roving is tightened, tension measurement is no longer possible, although there may be different tensions in the roving which do not necessarily lead to breakage.
  • US Pat. No. 4,134,253 eliminates this disadvantage by an artificial vibration caused by air blasts. Apart from the fact that interference frequencies are difficult to separate, so that the signal generated becomes unreliable, such a device is relatively expensive because of the air lines and the air pulse generator.
  • the current, but still unsatisfactorily solved problem of tension regulation according to the preamble of claim 1 can be solved cost-effectively and reliably.
  • the roving diameter on the bobbin becomes uniform, ie there are no roving lengths with different warping, the proofs are omitted, whereby the makeready time can be shortened and a softer roving twist is possible, ie a roving with fewer twists can be produced by setting the corresponding setpoint.
  • Other parameters, such as material, bulk, thickness, wing-crown type, number of wraps on the hand, etc. can easily be taken into account by setting the setpoint, since the setpoint can also be changed by the user while it is being wound up.
  • the actual value can be determined over a roving length that has passed through, for example 0.1-10, preferably 1 meter. Or, according to claim 3, the actual value can be determined during a certain measuring time, for example 2 seconds. So that the bobbin structure can be influenced favorably (somewhat harder on the inside, somewhat softer on the outside), it is possible according to claim 4 to determine the setpoint value for the sliver tension as a function of the roving length already wound on the spindle. A roving length measuring device coupled to the drafting device can be used for this.
  • a wing drive mechanism 1 drives a wing 2 and a spindle drive mechanism 3 drives an associated spindle 4 carrying a sleeve 15.
  • the wing drive mechanism 1 and the spindle drive mechanism 3 are mechanically or electrically coupled via a central drive distributor 5 and via transmission lines 30 and 31.
  • the central drive distributor 5, which contains a central drive motor and an adjusting mechanism which reduces the speed of the spindle 4 with each new roving position, is mechanical or via transmission lines 32 and 33 electrically connected to a spindle lifting mechanism 35 or a drafting system 8. Between the drafting system 8 and the upper wing end 9, a tightened fuse or roving 10 extends. A loose fuse 10.1 forming a sag is shown in broken lines.
  • the fuse 10 has a greater tension and accordingly a smaller diameter 6 than the fuse 10.1, the diameter of which is indicated by the reference number 7. In addition, in the stretched case, the fuse 10 receives additional rotations originating from the wing crown, which further reduce the diameter.
  • a measurement sensor 12 is arranged, which feeds a preferably preprocessed signal 38 to a compatibility computer 39.
  • One or more, preferably four, measuring sensors 12, one roving 10, 10.1 each, can measure on a flyer.
  • a second measurement sensor 12.1 forwards a preprocessed signal 38.1 to the compatibility computer 39, which first checks all incoming signals for compatibility, so-called outlier values are eliminated, and then averages the values of these signals.
  • An actual signal 40 is sent from the computer 39 to a comparison computer 25, which compares the signal 40 with a desired signal 41 from a desired value transmitter 42 and generates an output signal 18 which is fed to the central drive distributor 5.
  • the speed control of the spindle 4 is readjusted with this signal 18.
  • FIG. 2 shows the basic structure of the measurement sensor 12.
  • a light source 19 generates parallel light 21 through an aperture 20, as a result of which the running roving 10 or 10.1 moves through it.
  • the thickness or the diameter of the fuse 10 generates a suitable shadow image on the diodes of the line or line camera 23 through the optics 22.
  • the discrimination threshold in the evaluation electronics 24 can be used to determine which shadow images should belong to the formation of the actual value.
  • the following Computer 25 determines the output signal or input signal 18 in the central drive distributor 5.
  • FIG. 2 A possible but preferred embodiment of a measurement sensor 12 is shown in FIG. 2. Another embodiment may be to concentrate the light through optics 22 and measure the light intensity at the focus. There is a greater risk of flying through free fibers.
  • Another version is provided by a light scanner. Here, light is cast onto a prism rotating around its longitudinal axis. The emitting light beam is interrupted by the fuse 10, and the interruption is measured in time, from which the thickness or the diameter of the fuse is determined.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP19910105760 1990-04-24 1991-04-11 Verfahren zur Regelung der Spannung eines Vorgarnes an einer Vorspinnmaschine Expired - Lifetime EP0453890B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH137790A CH681233A5 (sr) 1990-04-24 1990-04-24
CH1377/90 1990-04-24

Publications (2)

Publication Number Publication Date
EP0453890A1 EP0453890A1 (de) 1991-10-30
EP0453890B1 true EP0453890B1 (de) 1994-11-30

Family

ID=4209004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910105760 Expired - Lifetime EP0453890B1 (de) 1990-04-24 1991-04-11 Verfahren zur Regelung der Spannung eines Vorgarnes an einer Vorspinnmaschine

Country Status (4)

Country Link
EP (1) EP0453890B1 (sr)
JP (1) JPH0693520A (sr)
CH (1) CH681233A5 (sr)
DE (1) DE59103617D1 (sr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0644282B1 (de) * 1993-09-21 1997-07-09 B a r m a g AG Verfahren zur Qualitätssteuerung bei der Herstellung einer Vielzahl von Fäden

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH638306A5 (de) * 1978-12-18 1983-09-15 Loepfe Ag Geb Verfahren und vorrichtung zum kontinuierlichen messen der querdimension eines laengsbewegten fadenartigen gebildes.
DD222362B5 (de) * 1983-11-25 1994-05-05 Grossenhainer Textilmaschinen Verfahren zur Vorgarnspannungsregelung an Vorspinnmaschinen mit Einzelantrieben
CH669177A5 (de) * 1986-03-17 1989-02-28 Schweiter Ag Maschf Verfahren und einrichtung zum umspulen eines fadens.
CH671973A5 (sr) * 1987-03-19 1989-10-13 Zellweger Uster Ag

Also Published As

Publication number Publication date
JPH0693520A (ja) 1994-04-05
EP0453890A1 (de) 1991-10-30
DE59103617D1 (de) 1995-01-12
CH681233A5 (sr) 1993-02-15

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