EP4368755A1 - Métier à filer à rotor et procédé de fonctionnement d'un métier à filer à rotor - Google Patents

Métier à filer à rotor et procédé de fonctionnement d'un métier à filer à rotor Download PDF

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Publication number
EP4368755A1
EP4368755A1 EP23208469.9A EP23208469A EP4368755A1 EP 4368755 A1 EP4368755 A1 EP 4368755A1 EP 23208469 A EP23208469 A EP 23208469A EP 4368755 A1 EP4368755 A1 EP 4368755A1
Authority
EP
European Patent Office
Prior art keywords
feed
control device
rotor spinning
roller
feed speed
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.)
Pending
Application number
EP23208469.9A
Other languages
German (de)
English (en)
Inventor
Günter Scheer
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.)
Saurer Spinning Solutions GmbH and Co KG
Original Assignee
Saurer Spinning Solutions GmbH and Co KG
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 Saurer Spinning Solutions GmbH and Co KG filed Critical Saurer Spinning Solutions GmbH and Co KG
Publication of EP4368755A1 publication Critical patent/EP4368755A1/fr
Pending 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
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/24—Driving or stopping arrangements for twisting or spinning arrangements, e.g. spindles
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/42—Control of driving or stopping
    • D01H4/44—Control of driving or stopping in rotor spinning
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/32—Regulating or varying draft
    • D01H5/38—Regulating or varying draft in response to irregularities in material ; Measuring irregularities

Definitions

  • Rotor spinning machines with two independently operable feed rollers or feed roller sections of a single feed roller, as well as methods for operating them, are known in a variety of designs from the prior art. Such rotor spinning machines enable two different or two identical spinning materials to be fed into the open-end rotor spinning device, which makes it possible to produce, for example, so-called effect yarns which, for example, have a thickness variation or color variation.
  • Determining the spinning parameters, such as the thread take-off speed, the rotor speed and the first and second feed speeds of the first and second feed rollers to produce a uniform yarn with specified yarn parameters is only possible with considerable effort.
  • the object of the invention is to provide a rotor spinning machine and a method for operating a rotor spinning machine, which enables simple adjustment of the feed speeds of the feed unit having at least two feed rollers.
  • the invention solves the problem by a method for operating a rotor spinning machine with the features of claim 1 and by a rotor spinning machine with the features of claim 5.
  • Advantageous developments of the invention are specified in the dependent claims.
  • the control device first determines the individual feed speed that would be required to produce the specified yarn using only one feed roller that feeds only a single fiber sliver to the open-end rotor spinning device after specifying the yarn properties of the yarn to be produced, for example by the operating personnel entering the yarn parameters via an operating unit.
  • the individual feed speed is therefore the feed speed that would be required to produce a specified yarn using a feed unit that has only one feed roller.
  • This individual feed speed is used in the control device as the basis for setting the first feed speed of the first feed roller and the second feed speed of the second feed roller, namely in such a way that the control device coordinates the first feed speed and the second feed speed in such a way that their sum corresponds to the previously determined individual feed speed. If the operator changes the first feed speed, for example, the control device automatically adjusts the second feed speed so that the sum of the first and second feed speeds again corresponds to the previously determined individual feed speed.
  • the operating personnel thus have the option of adjusting the proportion of fiber slivers fed to the open-end rotor spinning device without causing irregularities in the yarn to be produced. When two similar fiber slivers are fed, mass fluctuations in the spun fiber mass are also prevented, so that a consistently uniform yarn can be produced.
  • the method according to the invention is characterized in that the determination of the spinning parameters, in particular the individual feed speed, can be carried out in a known manner simply and reliably.
  • This individual feed speed is used as the basis for the operation of the feed unit with at least two feed rollers, whereby the ratio of the feed speeds of the individual feed rollers is coordinated by the control device in such a way that this together represents 100% of the individual feed speed.
  • Increasing the feed speed of the first feed roller in a feed unit with two feed rollers leads to a reduction in the feed speed of the second feed roller.
  • the ratio of the feed speeds to one another represents a further spinning parameter which can be set, for example, by the operating personnel via an operating unit connected to the control device.
  • the number of yarn parameters used to determine the individual feed speed is generally freely selectable.
  • the control device for determining the individual feed speed records the twist, the draft and/or the yarn number of the yarn to be produced. Taking a large number of yarn parameters into account makes it possible to use the control device to determine the spinning parameters, for example the rotor speed representing the reference variable, as well as the speed of the thread take-off and the individual feed speed particularly precisely as the basis for setting the feed speed of the first and second feed rollers.
  • control device also detects the sliver numbers of the slivers to be fed in, which additionally increases the quality of the yarn to be produced.
  • the determination of the individual feed speed on the basis of the specified yarn properties can in principle be carried out in any way.
  • the control device calculates the individual feed speed on the basis of the specified yarn properties or retrieves it from a database.
  • the individual feed speed can be reliably determined in a simple manner using proven methods. There is also sufficient data available to determine the individual feed speed, i.e. the feed unit with only one feed roller, in order to be able to make this available in a simple manner in a database.
  • a characteristic feature of the rotor spinning machine is that the control device for determining a single feed speed of a feed roller for producing a yarn with predetermined yarn properties from only one single, by means of which only one feed roller. Based on this individual feed speed, the control device is further designed to set a first feed speed of the first feed roller and a second feed speed of the second feed roller such that the sum of the first and second feed speeds corresponds to the individual feed speed.
  • the rotor spinning machine according to the invention is characterized in that the individual feed speed required to produce the specified yarn can be determined in a particularly simple manner using the control device.
  • This is used in the control device as the basis for setting the feed speed of the individual feed rollers, with the control device coordinating the feed speeds in such a way that their sum corresponds to the individual feed speed.
  • Adjustments to one of the feed speeds of the feed rollers e.g. by the operating personnel, thus automatically leads to a corresponding adjustment of the feed speed of the other feed roller by the control device in such a way that the sum of the feed speeds corresponds to the individual feed speed previously determined by the control device.
  • the rotor spinning machine according to the invention thus allows the operating personnel to make adjustments to the fiber sliver feed in a particularly simple manner without affecting the uniformity of the yarn to be produced.
  • control device is connected to an operating device for data input.
  • the operating unit thus enables the operating personnel to conveniently enter the yarn parameters of the yarn to be produced, so that the spinning parameters can be determined by the control device.
  • the operating unit also enables the machine operator to adjust the speed of the individual feed rollers, with the control device then automatically adjusting the feed roller that has not been adjusted accordingly.
  • control device is connected to a computing unit and/or a database.
  • the computing unit enables the individual feed speeds to be calculated in a known and proven manner.
  • the use of a database allows the control device to alternatively or In addition, to query the spinning parameters based on the yarn parameters of the yarn to be produced.
  • FIG 1 shows in a perspective view an embodiment of a rotor spinning machine 1, with a central control unit 8, which is equipped with a control device 9 designed according to the invention.
  • Rotor spinning machines are known to have a large number of work stations 2, each of which is equipped with an open-end rotor spinning device 3 and a winding device 4.
  • the individual work stations 2 each have a feed unit 11, which is subsequently Figure 2 is shown.
  • the work stations 2 of the rotor spinning machine 1 are supplied by service units 5. These serve, for example, to exchange a finished cross-wound bobbin 7 for a fresh empty tube at the work stations 2.
  • the rotor spinning machine 1 has the central control unit 8, which is equipped with a control device 9 designed according to the invention. Using an operating unit 10, the system operator has the option of entering yarn parameters of the yarn to be produced and reading and changing spinning parameters.
  • the control device 9 also serves to control the schematically shown Figure 2 shown feed unit 11 for feeding fibers from at least two fiber bands 12, 13 into the Open-end rotor spinning device 3.
  • the feed unit 11 has two feed rollers 16, 17, which can be driven separately by the control device 9, for feeding fiber bands 12, 13, and an opening roller 14 for separating the fiber bands 12, 13 into individual fibers.
  • the feed rollers 16, 17 have a first roller section 18 and a second roller section 19, each of which is intended for feeding a fiber sliver 12, 13.
  • Both roller sections 18, 19 are formed identically to one another and in particular have an identical shape and size. In order to better transport the fiber sliver 12, 13 fed in, both roller sections 18, 19 each have a linear profile.
  • the first feed roller 16 and the second feed roller 17 can be driven separately from one another via the control device 9 using drives not shown here.
  • the control device 9 first records yarn parameters of a yarn to be produced, in particular the draft, the twist, the yarn number and the sliver number of a sliver to be fed. Based on this, the control device 9 determines the necessary individual feed speed of the individual feed roller 16, 17 in the case of a feed unit 11 having only one feed roller 16, 17 for feeding a sliver 12, 13. This individual feed speed serves the control device 9 as a reference value for controlling the two feed rollers 16, 17 of the feed unit 11.
  • the sum of the feed speeds of the two feed rollers 16, 17 corresponds to the individual feed speed previously determined by the control device 9.
  • the control device 9 increases or decreases the feed speed of the other feed roller 16, 17.
  • a guide element 20 with a feed section 21 is arranged in the feed direction of the feed rollers 16, 17, wherein the feed section 21 is formed flat and a feed trough 22 opposite the feed rollers 16, 17 and lowered into the plane of the feed section 21 Between the feed trough 22 and the feed rollers 16, 17 there is a gap 23 in which the fiber bands 12, 13 are transported to the rotating feed rollers 16, 17.
  • a guide housing 24 is arranged directly in front of the feed rollers 16, 17, which surrounds each of the two fiber slivers 12, 13 fed to one of the roller sections 18, 19 on three sides, so that together with the flat surface of the feed section 21 as the fourth side, a closed guide tunnel 25, 26 is formed for each of the two fiber slivers 12, 13.
  • the first guide tunnel 25 is longer than the second guide tunnel 26 so that the first fiber sliver 12 fed from the underside of the guide element 20 from a spinning can 6 cannot come into contact with the second fiber sliver 13 fed from the top of the guide element 20 from a spool 27, whereby a completely independent feed of both fiber slivers 12, 13 is achieved.
  • the guide element 20 formed in one piece has an opening roller section 28 following the feed trough 22, which extends in sections along the direction of rotation of the opening roller 14 at a constant distance along the surface of the opening roller 14.
  • the gap formed between the opening roller section 28 and the surface of the opening roller 14 ensures that the fiber bands 12, 13 fed by the feed rollers 16, 17 are reliably separated into individual fibers on the surface of the opening roller 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP23208469.9A 2022-11-14 2023-11-08 Métier à filer à rotor et procédé de fonctionnement d'un métier à filer à rotor Pending EP4368755A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU503052A LU503052B1 (de) 2022-11-14 2022-11-14 Rotorspinnmaschine sowie Verfahren zum Betreiben einer Rotorspinnmaschine

Publications (1)

Publication Number Publication Date
EP4368755A1 true EP4368755A1 (fr) 2024-05-15

Family

ID=84981623

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23208469.9A Pending EP4368755A1 (fr) 2022-11-14 2023-11-08 Métier à filer à rotor et procédé de fonctionnement d'un métier à filer à rotor

Country Status (5)

Country Link
US (1) US20240158958A1 (fr)
EP (1) EP4368755A1 (fr)
JP (1) JP2024071348A (fr)
CN (1) CN118029025A (fr)
LU (1) LU503052B1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH562337A5 (fr) * 1973-01-10 1975-05-30 Krupp Gmbh
FR2266758A1 (fr) * 1974-04-03 1975-10-31 Vyzk Ustav Bavlnarsky
JPS5039183B1 (fr) * 1973-03-01 1975-12-15
CN103938322A (zh) * 2014-04-25 2014-07-23 嘉兴学院 一种转杯纺混色成纱方法及装置与产品
CN205635925U (zh) * 2016-01-26 2016-10-12 嘉兴学院 一种转杯纺混色成纱装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH562337A5 (fr) * 1973-01-10 1975-05-30 Krupp Gmbh
JPS5039183B1 (fr) * 1973-03-01 1975-12-15
FR2266758A1 (fr) * 1974-04-03 1975-10-31 Vyzk Ustav Bavlnarsky
CN103938322A (zh) * 2014-04-25 2014-07-23 嘉兴学院 一种转杯纺混色成纱方法及装置与产品
CN205635925U (zh) * 2016-01-26 2016-10-12 嘉兴学院 一种转杯纺混色成纱装置

Also Published As

Publication number Publication date
LU503052B1 (de) 2024-05-14
JP2024071348A (ja) 2024-05-24
CN118029025A (zh) 2024-05-14
US20240158958A1 (en) 2024-05-16

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