EP3231902A1 - Procédé de commande d'une machine textile comprenant une rangée de postes de travail disposés les uns à côté des autres et machine textile - Google Patents

Procédé de commande d'une machine textile comprenant une rangée de postes de travail disposés les uns à côté des autres et machine textile Download PDF

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Publication number
EP3231902A1
EP3231902A1 EP17163523.8A EP17163523A EP3231902A1 EP 3231902 A1 EP3231902 A1 EP 3231902A1 EP 17163523 A EP17163523 A EP 17163523A EP 3231902 A1 EP3231902 A1 EP 3231902A1
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EP
European Patent Office
Prior art keywords
sliver
workstation
yarn
detector
textile machine
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.)
Withdrawn
Application number
EP17163523.8A
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German (de)
English (en)
Inventor
Evzen Pilar
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.)
Rieter CZ sro
Original Assignee
Rieter CZ sro
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 Rieter CZ sro filed Critical Rieter CZ sro
Publication of EP3231902A1 publication Critical patent/EP3231902A1/fr
Withdrawn legal-status Critical Current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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • 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
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • 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

Definitions

  • the invention relates to a method of controlling a textile machine comprising a row of workstations arranged next to each other, in which at each workstation the presence of sliver is monitored before entering an entry sliver mechanism independently of the other workstations.
  • the invention also relates to a textile machine comprising a row of workstations arranged next to each other, each of which comprises a member for yarn formation, behind which are arranged in the direction of the fibrous material motion other subunits for yarn formation - for drawing-off yarn and for winding yarn on a bobbin, whereby at each workstation a detector of sliver presence is arranged.
  • monitoring of sliver is essential for achieving continuous, i.e. uninterrupted operation of the individual workstations of the machine and for feeding sliver to the workstations, the sliver being distributed in textile industry in containers, the so-called cans.
  • the monitoring of the sliver can be performed by the machine operator. However, this is inappropriate due to demands on human labor and due to unreliability of such monitoring.
  • On the attending device which is movable along the row of workstations, are arranged a light transmitter and a receiver of reflected light, which are directed to the area where light reflecting surfaces are positioned at the workstations.
  • the detector of sliver on the attending device is formed by a sensor able to detect the presence of sliver without reflection, and so there is no reflecting surface at the workstation.
  • the receiver of the reflected light on the attending device catches the reflection of the light emitted by the light transmitter on the attending device, it means that the sliver is not present at the particular workstation and necessary measures are taken for the operator of that particular workstation. Otherwise, the attending device must stop by the workstation and only then it is able to perform the detection of the sliver.
  • the disadvantage of this arrangement is the fact that the information about the sliver is obtained only during the movement of the attending device passing by or when it is stopped. Therefore, a situation may occur, and, indeed, such situations do occur, when the sliver at a particular workstation is not detected for some time due to the workload of the attending device at the other workstations, which reduces the possibilities of the automatic operation of the machine, the operator functions, etc. Due to irregular sliver detection the sliver is completely consumed and yarn production is stopped at the workstation with the yarn end being wound on the bobbin, if it is not the case when the method of controlled stopping of the workstation without winding the yarn end on the bobbin is applied.
  • the aim of the invention is to eliminate or at least minimize the disadvantages of the background art.
  • the aim of the invention is achieved by a method of controlling a textile machine comprising a row of workstations arranged next to each other, whose principle consists in that the presence of sliver is monitored at each workstation at least at a certain distance in front of the member for yarn formation, whereby the distance is determined by the velocity of the sliver motion and the period of time which is necessary for the controlled stopping of the workstation with yarn situated in the travel path at the workstation, the yarn not being wound on the bobbin after stopping the workstation.
  • the principle of the textile machine comprising a row of workstations arranged next to each other consists in that at each workstation a detector of sliver is disposed at a certain distance in front of a member for yarn formation, whereby the distance is determined by the velocity of the sliver motion and the period of time necessary for the controlled stopping of the workstation with yarn situated in the travel path at the workstation, when the yarn end is not wound on the bobbin after stopping the workstation.
  • the advantage of this arrangement is providing information continuously about the state of the sliver at each workstation regardless the operation of the attending device. That enables to introduce a number of automation procedures even on machines with a lower number of attending devices or even on machines without any attending devices.
  • Another positive aspect of this invention is the fact that it allows further optimization of the movement of the attending device along the row of workstations and use the work time of the attending device really only for providing attendance to the workstations, which enables to reduce the number of attending devices required for the servicing of all the workstations of the machine.
  • Another advantage of the solution according to the invention is that due to the fact that the sliver is not monitored in the lower part of the workstation any longer, the attending device can be reduced in height.
  • the sliver is consumed at the workstation without providing supply of new sliver in time, this state is immediately registered, which allows to respond immediately and stop the production at the respective workstation so that resuming production after the feeding of new sliver will take a minimum of time with very few means involved, e.g., it enables to stop the yarn production in such a manner that the yarn end is situated in the travel path at the workstation in the vicinity of the member for yarn formation and the individual subunits of the workstation are prepared to renew yarn production. Also, if the sliver end is detected in time, it enables to stop the workstation in a controlled manner, in which the yarn end stops in the travel path of the yarn at the respective workstation without this yarn being wound on the bobbin.
  • the operator After such controlled stopping the operator only guides the new sliver properly and can initiate the spinning-in process, because the preceding preparatory process can take place before introducing the new sliver without having to find the free end of yarn on the bobbin manually or automatically, thereby significantly reducing the standstill time of the workstation and extending production time of the workstation.
  • Another advantage is avoiding a risk of false detection of sliver, which may occur due to the influence of the color of the fibers or the thickness of the sliver or due to incorrect mutual position of the devices of the system consisting of the light emitter on the attending device, the reflecting surface at each workstation, the receiver of the reflected light on the attending device, etc.
  • Fig. 1 shows several workstations of the textile machine arranged next to each other
  • Fig. 2 shows an example of using the present invention on an open-end spinning machine
  • Fig. 2a is a detail of a holder with a detector of sliver in the direction X of Fig. 2
  • Fig. 3 represents the first example of using the invention on an air-jet spinning machine
  • Fig. 3a shows another example of using the invention on an air-jet spinning machine
  • Fig. 3b is a top view of an arrangement of an entry condenser and a transverse arm with the detector of sliver
  • Fig. 4 shows another example of using the present invention on an air-jet spinning machine - the state during spinning
  • Fig. 4a shows an arrangement according to Fig. 4 - the state after the controlled stopping of the workstation.
  • the textile machine comprises a row of identical workstations 1 arranged next to each other, which perform identical operations for the formation of yarn from sliver 2 .
  • Each workstation 1 is aligned with a space 3 for mounting a container 4 of sliver 2 .
  • the sliver 2 is guided to a spinning unit 5 , behind which in the direction of the fibrous material movement are arranged other subunits, especially a drawing-off mechanism O of yarn P and a winding device W for winding yarn on a bobbin C .
  • These subunits as such are well-known, both from the philosophical point of view and from the point of view of their design, therefore they will not be described in detail. For this reason, the fibrous material being processed in Fig. 1 ends in the inlet hole of the spinning unit 5 , and the process of converting sliver 2 into yarn and its winding on the bobbin is not illustrated.
  • the spinning unit 5 of each workstation is aligned with a detector 6 of sliver, which is connected to a control system of a respective workstation 1 , or it is connected to a control system of a group (section) of workstations 1 of the machine or it is connected to a control system of the entire machine.
  • the detector 6 of sliver comprises a source 60 of light and a sensor 61 of light, which is situated opposite, whereby between the source 60 of light and the sensor 61 of light there is a gap 62 for the passage of the monitored sliver 2 .
  • the gap 62 thus forms a detection space of sliver 2 .
  • the detector 6 of sliver is produced by using a different suitable technology, able to detect the presence of the fibrous material in the detection space, e.g. the detector 6 of sliver is created as a capacity detector.
  • the detector 6 of sliver is at each workstation arranged at a distance Y in front of the member for yarn formation, i.e. in front of the spinning rotor or in front of the spinning nozzle, etc., whereby the minimum distance Y of the detector 6 is determined by the velocity of the sliver 2 motion and the period of time required for performing the controlled stopping of the workstation after detecting the absence of the sliver 2 in such a manner that the yarn P end still remains in the travel path of the yarn at the workstation and is not wound on the bobbin C , and therefore it is not necessary to find the yarn P end on the bobbin C .
  • the invention makes it possible for the end of sliver 2 to be situated after the controlled stopping of the workstation with yarn P in the travel path at the workstation in a defined place or in a defined area (at a distance) at the workstation and the entire sliver is not consumed. Otherwise, further processes would be necessary for the attendance of the workstation.
  • the spinning unit 5 of the workstation 1 is provided with an inlet hole 8 of sliver 2 leading into the spinning unit 8 of the workstation 1 of an open-end spinning machine.
  • a holder 7 is mounted on the spinning unit 5 in front of the inlet hole 8 , the holder being provided with a guide device 70 of sliver 2 .
  • the guide device 70 is here provided in the form of a pair of parallel walls 700 , between which there is a gap 62 for the passage of the sliver 2 , where the gap 62 constitutes a detection space of sliver 2 .
  • One wall 700 of the guide device 70 is on the inner side of the guide device 70 provided with a source 60 of light and the other wall 700 of the guide device 70 is on the inner side of the guide device 70 provided with a sensor 61 of light, the source 60 and the sensor 61 of light constitute forming an optical sensor 6 of sliver.
  • the length of the holder 7 which determines the overall distance Y of the detector 6 of sliver 2 from the member for yarn formation corresponds to the expected velocity of sliver 2 and the period of time required for the response of the workstation 1 , or, more specifically, the response of its respective subunits, to the signal of the detector 6 of sliver 2 about the absence of the sliver 2 and to the subsequent controlled stopping of the workstation, so that the yarn P end can remain in the travel path of the yarn at the workstation and so that it is not wound on the bobbin C.
  • elements which make up a capacity detector are used instead of optical elements constituting the detector 6 of sliver.
  • Fig. 3 shows an exemplary embodiment with an entry condenser 90 of sliver 2 arranged in front of an entry drafting device 92 of the workstation 1 of an air-jet spinning machine.
  • a detector 6 of sliver In the entry condenser 90 is arranged a detector 6 of sliver, whereby in the opposite sides of the condenser 90 is mounted a source 60 of light and a sensor 61 of light and the inner space of the condenser 90 constitutes a gap 62 for the passage of the sliver 2 forming a detection space of the sliver 2 .
  • the detector 6 of sliver 2 is located at a distance Y in front of the member for yarn formation and the size of this distance Y corresponds to the expected velocity of sliver 2 and the required reaction time for the response of the workstation 1 , or the response of its respective working subunits, to the signal of the detector 6 of sliver 2 about the absence of the sliver 2 and to the subsequent controlled stopping of the workstation so that the yarn P end can remain in the travel path of the yarn at the workstation and so that it is not wound on the bobbin C.
  • the detector 6 of sliver is mounted in the direction of the sliver 2 motion in front of the entry condenser 90 , when on the holder 93 of the entry condenser 90 is provided a transverse arm 94 , which passes from the area A1 adjacent to one lateral side of sliver 2 through the space behind the sliver 2 as far as to the area A2 adjacent to the other lateral side of the sliver 2 .
  • each of the areas A1 , A2 on the transverse arm 94 is provided one V-shaped wall 940 , whereby between the areas A1 , A2 there is a gap 62 for the passage of sliver 2 forming a detection space of sliver 2 .
  • a source 60 of light In one V-shaped wall 940 is mounted a source 60 of light and in the other V-shaped wall 940 is mounted a sensor 61 of light, which together constitute the detector 6 of sliver.
  • an auxiliary guide device of sliver 2 is arranged in the direction of the sliver 2 motion in front of the detector 6 of sliver, the auxiliary guide device of sliver 2 being mounted in the illustrated embodiment on a common holder 93 with a transverse arm 94 .
  • the distance Y between the entry to the drafting device 92 of sliver 2 and the detector 6 of sliver corresponds to the expected velocity of sliver 2 and the required reaction time for the response of the workstation 1 for controlled stopping, or the response of the respective subunits, to the signal of the sensor 6 of sliver 2 about the absence of fibers.
  • elements which make up a capacity detector are used instead of optical elements constituting the detector 6 of sliver.
  • a sliver 2 break in front of the detector 6 can be detected by means of the detector 6 of sliver.
  • Fig. 4 schematically represents an embodiment with an arrangement of a workstation of an air-jet spinning machine, which in the direction from the bottom higher comprises a container 4 of sliver 2 .
  • a container 4 of sliver 2 From the container 4 the sliver 2 is guided to a drafting zone 50 of the sliver 2 , which represents here an entry subunit 5 of the spinning unit 8 .
  • Behind the drafting zone 50 is in the direction of the movement of the fibrous material arranged a zone 51 for twisting fibers into yarn.
  • it is a zone with an unillustrated spinning nozzle. From the spinning nozzle, and therefore from the spinning unit 5 , the yarn P is drawn off and is wound on the bobbin C in the winding unit W .
  • a detector 6 of sliver In the path of the sliver 2 between the point B in front of the entry of the sliver 2 into the drafting zone 50 of the sliver 2 and the point A in front of the entry of the sliver 2 into the zone 51 of twisting fibers into yarn is located a detector 6 of sliver, which is connected to a control system of a respective workstation 1 , or it is connected to a control system of a group (section) of the workstations 1 of the machine or it is connected to a control system of the entire machine.
  • the distance Y between the entry of the sliver 2 into the zone 51 of twisting fibers into yarn and the location of the detector 6 of sliver 2 corresponds to the expected velocity of sliver 2 and the reaction time required for the response of the workstation 1 , or, more specifically, the response of its respective subunits, to the signal of the detector 6 of sliver 2 .
  • the reaction time of the workstation is, e.g., the time needed for the controlled stopping of the workstation in such a manner that the end of the sliver 2 remains in front of the entry into the zone 51 of twisting fibers into yarn (see Fig.
  • reaction time of the workstation is in another example of embodiment also a different time, depending on how the workstation is to respond to the signal of the detector 6 of sliver and in what positions in relation to the subunits of the workstation the end of the sliver 2 and the yarn P end should end after the response of the workstation.
  • the invention can be used for the production as well as for the operation of textile machines producing yarn from sliver.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
EP17163523.8A 2016-04-12 2017-03-29 Procédé de commande d'une machine textile comprenant une rangée de postes de travail disposés les uns à côté des autres et machine textile Withdrawn EP3231902A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CZ2016-208A CZ2016208A3 (cs) 2016-04-12 2016-04-12 Způsob řízení textilního stroje obsahujícího řadu vedle sebe uspořádaných pracovních míst a textilní stroj

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Publication Number Publication Date
EP3231902A1 true EP3231902A1 (fr) 2017-10-18

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EP17163523.8A Withdrawn EP3231902A1 (fr) 2016-04-12 2017-03-29 Procédé de commande d'une machine textile comprenant une rangée de postes de travail disposés les uns à côté des autres et machine textile

Country Status (4)

Country Link
EP (1) EP3231902A1 (fr)
JP (1) JP2017190249A (fr)
CN (1) CN107287713A (fr)
CZ (1) CZ2016208A3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4375404A1 (fr) 2022-11-22 2024-05-29 Maschinenfabrik Rieter AG Procédé pour détecter la présence d'un ruban à l'entrée d'un poste de travail d'une machine textile

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154619A (en) * 1984-02-22 1985-09-11 Skf Textilmasch Komponenten A spinning machine draw frame having a sliver stop device
WO1999020819A1 (fr) 1997-10-21 1999-04-29 Rieter Elitex A.S. Procede de filage consistant a transformer une touffe de fibres sur un metier a filer et metier a filer permettant de mettre en oeuvre ce procede
EP2679711A1 (fr) * 2012-06-19 2014-01-01 Maschinenfabrik Rieter Ag Métier à tisser à jet d'air et procédé destiné au rattachement d'un fil

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DE4114069A1 (de) * 1991-04-30 1992-11-05 Fritz Stahlecker Verfahren und vorrichtung zum verfestigen des endstuecks eines fadens
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CZ283134B6 (cs) * 1995-10-16 1998-01-14 Maschinenfabrik Rieter Ag Způsob a zařízení pro zapřádání příze na rotorovém dopřádacím stroji
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Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154619A (en) * 1984-02-22 1985-09-11 Skf Textilmasch Komponenten A spinning machine draw frame having a sliver stop device
WO1999020819A1 (fr) 1997-10-21 1999-04-29 Rieter Elitex A.S. Procede de filage consistant a transformer une touffe de fibres sur un metier a filer et metier a filer permettant de mettre en oeuvre ce procede
EP2679711A1 (fr) * 2012-06-19 2014-01-01 Maschinenfabrik Rieter Ag Métier à tisser à jet d'air et procédé destiné au rattachement d'un fil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4375404A1 (fr) 2022-11-22 2024-05-29 Maschinenfabrik Rieter AG Procédé pour détecter la présence d'un ruban à l'entrée d'un poste de travail d'une machine textile

Also Published As

Publication number Publication date
CN107287713A (zh) 2017-10-24
JP2017190249A (ja) 2017-10-19
CZ307017B6 (cs) 2017-11-15
CZ2016208A3 (cs) 2017-11-15

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