EP0289028B1 - Procédé et dispositif pour attacher un fil dans une machine de filature du type à friction - Google Patents

Procédé et dispositif pour attacher un fil dans une machine de filature du type à friction Download PDF

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Publication number
EP0289028B1
EP0289028B1 EP88106851A EP88106851A EP0289028B1 EP 0289028 B1 EP0289028 B1 EP 0289028B1 EP 88106851 A EP88106851 A EP 88106851A EP 88106851 A EP88106851 A EP 88106851A EP 0289028 B1 EP0289028 B1 EP 0289028B1
Authority
EP
European Patent Office
Prior art keywords
yarn
rollers
draw
pair
guide tube
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
EP88106851A
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German (de)
English (en)
Other versions
EP0289028A1 (fr
Inventor
Emil Briner
Samuel Wehrli
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
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Filing date
Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Priority to AT88106851T priority Critical patent/ATE67532T1/de
Publication of EP0289028A1 publication Critical patent/EP0289028A1/fr
Application granted granted Critical
Publication of EP0289028B1 publication Critical patent/EP0289028B1/fr
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
    • 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
    • D01H4/48—Piecing arrangements; Control therefor
    • D01H4/52—Piecing arrangements; Control therefor for friction spinning

Definitions

  • the invention relates to a method for piecing a yarn on a friction spinning device, as specified in the preamble of claim 1 of the claim for the contracting state France.
  • the invention further relates to a device for piecing a yarn onto a friction spinning device, as described in the preamble of claim 2 of the claim for the contracting state France or in the preamble of claim 1 of the claim for the contracting states Austria, Switzerland, Federal Republic of Germany, United Kingdom, Italy and Liechtenstein is specified.
  • the devices known hitherto for the above-mentioned piecing of a yarn make use of a yarn end which has been retrieved from a bobbin and which is put into stationary friction spinning means for piecing, in order to subsequently carry out the piecing at a reduced speed of the friction spinning device by feeding fibers to the retrieved yarn end. It is also proposed that before piecing, ie before feeding the free-flying fibers to the inserted yarn end, the same is turned up by moving the friction spinning means in the opposite direction, in order thereby to connect the delivered fibers better to the yarn end or. to intertwine.
  • Such a device is known from DE-OS 3318687, in which a yarn end is picked up by a turned-back bobbin by a suction device and this sucked-in yarn is held in the gusset gap by two stopped friction spinning drums by means of two lifting devices.
  • the yarn Before free-flying fibers are delivered to this yarn, the yarn is opened by turning back the friction spinning drum, so that its fibers lie essentially without rotation in the gusset gap of the friction spinning drums.
  • the friction spinning drums are then put into operation at a reduced speed in the normal direction of rotation and free-flying fibers are fed to the opened yarn, and the resulting yarn is drawn off at a correspondingly reduced speed and fed to a connecting means.
  • the delivered yarn is picked up by a suction nozzle that functions as a yarn store.
  • the entire device is brought up to the operating speed and then decoupled from the necessary auxiliary drive means and driven by the normal drive means at the operating speed.
  • a device for spinning a yarn on a friction spinning device which consists of a friction spinning drum and a counter roll, between which a gusset gap is formed as a yarn formation area.
  • a pair of draw-off rollers is assigned to the yarn formation area to which the fibers to be spun are fed by means of a known fiber sliver dissolving device. The two rollers of the pair of take-off rollers can be separated from one another for piecing.
  • This piecing process has the disadvantage that the winding and the adjoining yarn-like structure or the initial yarn must be withdrawn by means of the mechanically separate take-off rollers by means of a reciprocating movement of the suction device, which can lead to difficulties at higher production speeds.
  • EP-A-0 222 101 which only applies to the contracting states Austria, Switzerland, Federal Republic of Germany, United Kingdom, Italy and Liechtenstein within the meaning of Article 54 (3) EPC, describes a process for piecing described on a friction spinning device in which a gusset gap between a friction spinning drum and a counter roller is used as the yarn formation area is provided. A pair of draw-off rollers is assigned to the yarn formation area. In addition, a guide tube is provided between the yarn formation area and the pair of draw rollers. In addition to a fiber feed device, a blowing duct blowing in the yarn withdrawal direction is assigned to the yarn formation area.
  • a fiber roll is first formed in the yarn formation area, which, as soon as it has reached a sufficient thickness and strength, is blown through the guide tube into the converging area of the take-off rollers by means of the blowing duct. There, the winding can be grasped by the take-off rollers without having to lift them apart, as a result of which the yarn is then drawn off at the normal operating speed.
  • the object of the present invention is to provide a method and a device for spinning a yarn on a friction spinning device, which is uncomplicated and can be carried out with relatively simple means, or to further improve such a spinning device.
  • the method according to the invention and the devices provided for carrying out this method ensure that piecing after thread breaks on a friction spinning device is carried out at normal operating speed, that is to say at production speed can without moving any mechanical parts.
  • FIG. 1 shows a fiber sliver dissolving device 1 known from the rotor open-end spinning method, with an opening roller (not shown) indicated by a drive shaft 1.1 and with a feed opening A provided for receiving a sliver (not shown) by means of a connection to the opening device 1 adjoining fiber conveying channel 2, by means of an air stream flowing through it, free-flying fibers are discharged onto a perforated rotatable and drivable friction spinning drum 3, on which a yarn end 5.1 developing into a yarn 5 is formed in a manner known per se at a yarn formation point 7 (FIG. 2) becomes.
  • An also rotatable and drivable Counter roll 4 which is arranged contact-free but very close (for example between 0.05 and 0.15 mm) to the friction spinning drum 3 and parallel to it, serves as an aid for screwing in the fibers at the yarn formation point 7 located in the gap between the two rolls
  • the finished yarn 5 is drawn off by a yarn take-off means provided as a pair of take-off rollers 6.
  • a yarn take-off means provided as a pair of take-off rollers 6.
  • a blowing channel 8 opens above the yarn formation point into the gusset gap of the two friction spinning drums 3 and 4 (also called friction spinning rollers 3 and 4).
  • the length G of the outlet mouth 9 of the blowing channel 8 corresponds at least to the length F (FIG. 1) of the perforation of the friction spinning drum 3, while the length H of the outlet mouth 22 of the fiber conveying channel 2 corresponds at most to the length F of the perforation.
  • This perforation is marked with P in FIG. 1 and is only shown in sections.
  • the width (not marked) and Shape of the outlet mouth 9 of the blow channel 8 wherein the shape of the outlet mouth should be understood to mean the design of the outlet mouth surface in order to be able to vary the intensity of the air flow at the mouth.
  • the width of the outlet mouth can be designed differently within the length of the outlet mouth in order to obtain differences in the blowing effect along the outlet mouth.
  • the blow duct 8 also has a connecting piece 10, by means of which it can be connected to a compressed air network, not shown, with all the elements known per se for regulating the air pressure and the air quantity and for controlling the air flow.
  • FIG. 3a it is shown with the distance D.1 that the outlet mouth 9 of the blow channel can be further away from the yarn end 5.1 than the outlet mouth 22 of the fiber conveying channel 2 which is at a distance K.
  • blow-out duct 8.1 which is indicated by dash-dotted lines in FIG. 3, that the position of the duct is not tied to the position of the blow-out duct 8, shown with solid lines, without a loss of the blowing action described later being found.
  • the previously mentioned air flow in the fiber conveying channel 2 for conveying the fibers 11 from the opening roller (not shown) belonging to the opening device 1 to the friction spinning drum 3 is generated in a manner known per se by a suction nozzle 23 located in the friction spinning drum 3 which generates an intake air flow on the surface of the friction spinning drum 3 along the length F of the perforation P, within which the yarn end 5. 1 and the outlet mouth 22 of the fiber conveying channel 2 are located.
  • 2 fibers 11 are initially fed onto the friction spinning drum 3 by means of the fiber conveying channel, without first pulling these fibers off as yarn, so that a rotating spool 12 that grows larger is formed.
  • a suction device 13 as a yarn pick-up means is brought to the diverging side of the pair of take-off rollers 6 rotating in the direction of the arrow in such a way that it is able to take over the roll 12 emitted by the take-off roller pair 6.
  • the guide tube 15 is, as shown in Fig. 2, provided between the end faces of the friction rollers 3 and 4 and the take-off rollers 6, in such a way that the axis of symmetry (not shown) of the guide tube lies essentially in an imaginary plane which Includes line of contact (not shown) of the two take-off rollers 6 and the location on the friction spinning drum 3 at which the yarn 5 leaves this friction spinning drum.
  • This guide tube 15 is larger than the outside diameter of the aforementioned fiber roll 12, for example twice as large.
  • the outlet mouth of the guide tube 15 can be provided with recesses such that the outlet mouth is adapted to the peripheral surface of the take-off rollers 6.
  • the guide tube can be designed as an injector guide tube 15.1 by providing blow-in openings 16 and 17 which give a force component in the yarn withdrawal direction Z to an air stream guided through these openings.
  • the air flow mentioned is generated by an overpressure, annular pressure chamber 18 provided around these injection openings 16 and 17.
  • the pressure chamber 18 itself is fed via a connecting bore 19 from a compressed air system, not shown, of which a connecting pipe 20 is the last link.
  • the connecting pipe 20 is fixedly connected to a pressure housing 21 containing the pressure chamber 18 and the connecting bore 19.
  • the pressure housing 21 serves to hold the injector guide tube 15.1 firmly and seals the pressure chamber 18 from the atmosphere.
  • the injector guide tube 15.1 therefore has the advantage over the guide tube 15 of positively conveying the aforementioned winding 12 into the converging space of the take-off rollers 6 when spinning on.
  • the yarn 5 which is then also sucked in (see FIG. 7) is guided by means of this suction device 13 to the further elements belonging to the spinning machine (not shown) but not mentioned here.
  • the aforementioned piecing process can be carried out at full production speed, so that the yarn delivered by the take-off rollers corresponds to the yarn to be produced.
  • Such a device with said band is shown, for example, in French Patent Application No. 2480799.
  • a mechanical holding device (not shown) can also be used instead of the suction device 13.
  • the receiving device only has to be able to receive the winding 12 and the subsequent yarn 5 at the production speed in the manner mentioned.
  • the order is chosen so that the fibers 11 are delivered first and the air flow mentioned only after receipt of a roll 12 of the desired or predetermined size is turned on.
  • the switching on of the air flow can be used before the fibers 11 are delivered in order to clean the surface of the friction spinning drum 3 and the counter roller 4 if necessary.
  • this cleaning air stream in accordance with the previously mentioned, can optionally be maintained before the delivery of the fibers 11 or switched off beforehand.
  • Fig. 2 with the dash-dotted line S is the mean flow line of the one in the blow channel Air flow indicated and shown with the angle ⁇ that this flow line S is inclined to the yarn end 5.1 that the back pressure created by the air flow generated thereby generates a force component R directed against the pair of draw-off rollers 6 and acting on the winding 12.
  • the angle ⁇ is advantageously chosen to be less than 45 degrees.
  • FIGS 8 and 9 show an advantageous variant of the embodiment of the guide tube 15 and. 15.1 by the guide tube in that half, seen in the yarn take-off direction Z, which is opposite the take-off roller pair 6, vent openings 26 and. 27 has.
  • these ventilation openings it is essentially avoided that the main amount of air supplied in the guide tube 15 flows in the converging space of the suction rolls in the axial direction of these rolls, which, depending on the amount of air required and the weight of the roll 12, would have the disadvantage that the roll would have The air is also branched off and is not caught by the pair of draw rollers 6.
  • This escape of air through the vents 26 and. 27 can additionally be supported by a suction device 24 provided in the area of these ventilation openings (shown with dash-dotted lines).
  • the suction device 24 grips around the guide tube, so that the air is sucked out evenly over the circumference through the ventilation openings.
  • a graduated suction can be advantageous, in which, for example, the hole density increases in the yarn take-off direction Z. This allows the air release can be increased without giving the winding 12 the opportunity to dodge in the axial direction of the take-off rollers.
  • the speed of the conveying air must be selected in such a way that the winding 12 does not get stuck on the inner wall of the guide tube.
  • vent openings are provided as bores 26 in FIG. 8 and as slots 27 in FIG. 9.
  • the guide tubes 15 and 15.1 can be provided with the ventilation openings, that is to say that the combination of the suction 24 with the injection openings 17 and. the associated pressure housing 21 can be combined.
  • the guide tube is identified in FIG. 8 by 15a and 15.1a and in FIG. 9 by 15b and 15.1b.
  • the gradually increasing ventilation of the guide tube 15b, respectively. 15.1b can be created by extending individual slots, as shown with dashed lines.
  • FIG. 15.1 A further variant of the type of venting of FIGS. 8 and 9 is shown in FIG. 15.1 are shortened and protrude at a predetermined distance E from the pair of draw-off rollers 6 into a ventilation pipe 33.
  • the shortened guide tubes are 15c resp. 15.1c marked.
  • the inner diameter B of the vent pipe 33 is relative to the outer diameter C of the pipes 15c, respectively. 15.1c selected such that the air speed in the ventilation pipe 33 is just sufficient to direct the winding 12 onto the rotating peripheral surface of the take-off rollers 6 to promote so that the winding 12 can get into the nip of the take-off rollers 6.
  • the difference between the inner diameter B and the outer diameter C creates an annular ventilation opening 35.
  • the distance E is advantageously at least as large as the difference between B and C.
  • FIG. 11 Another embodiment in the function of the guide tube 15 is shown in FIG. 11 with the guide trough 25. As shown in FIG. 11, this channel is closed at the bottom and open at the top and can have either a V-shaped or U-shaped cross section.
  • the channel base 28 is only slightly deeper than the stretched yarn guide line of the winding 12, as is shown in FIG. 11.
  • a further advantageous embodiment shown in FIG. 12 in combination with the guide trough 25 consists in the blow channel 8 being extended in the direction of take-off rollers 6 in the manner identified by 8.1 and shown with dashed lines, so that the blow air not only against the yarn formation point, but also blows into the guide trough 25.
  • the blow channel 8.1 should only be guided against the take-off rollers 6 up to a given distance in order to give the blown-in air the opportunity to escape in such a way that the main air quantity can escape from the channel 25 upwards (seen with a view of FIG. 12).
  • FIG. 13 shows a variant of the devices of FIGS. 1 to 7, in that the upper take-off roller (viewed with a view of the figures) is provided such that it can be lifted off.
  • the lifting can be done by any means known per se, for example a pneumatic cylinder 29, which is connected in an articulated manner on the one hand to a fixed housing part 30 and on the other hand to a pivot lever 31, the pivot lever at the end 32 likewise in a fixed housing part (not shown) is pivotally received.
  • the swiveling up of the upper take-off roller 6 occurs only briefly for the winding 12 to be carried out. By lifting this up, there is the possibility that the through the guide tube 15 or. 15.1 conveyed air does not have to flow in the axial direction of the take-off rollers 6.
  • a variant of the guide tubes 15 to 15c and 15.1 to 15.1c is that the guide tube is conical (not shown), either over the entire length or in the front half, seen in the direction of conveyance of the yarn.

Claims (12)

  1. Dispositif servant à rattacher un fil dans un dispositif de filage par friction, qui comprend au moins un moyen de filage par friction (3) ayant une surface de friction pour le filage et une paire de rouleaux d'extraction (6),

    caractérisé par le fait
    qu'un canal de soufflage (8; 8.1) est prévu dont la direction de soufflage est dirigée vers le lieu de formation de fil sous un angle (α) tel que la pression dymamique provoquée par le courant d'air est divisible en deux composantes de force de différentes grandeurs, la plus grande de ces composantes de force agissant dans le sens d'extraction (Z) du fil formé (5), et

    qu'un élément de guidage de fil est prévu entre le moyen de filage par friction (3) et la paire de rouleaux d'extraction (6), élément qui est formé comme un tuyau de guidage (15a, 15.la; 15b, 15.1b; 15c, 15.1c, 33) ayant des ouvertures latérales d'aération (26, 27, 35) ou comme une rigole de guidage (25), de sorte que la quantité principale de l'air alimenté dans l'élément de guidage de fil s'échappe avant l'espace convergeant formé par la paire de rouleaux d'extraction (6).
  2. Dispositif selon revendication 1,

    caractérisé par le fait
    que les ouvertures d'aération (26, 27, 35) sont prévues dans la moitié du tuyau de guidage de fil (15a, 15.1a; 15b, 15.1b; 15c, 15.1c, 33) qui se trouve en face de la paire de rouleaux d'extraction (6).
  3. Dispositif selon revendication 2,

    caractérisé par le fait
    que le tuyau de guidage de fil (15a, 15.1a; 15b, 15.1b; 15c, 15.1c, 33) débouche vers la paire de rouleaux d'extraction (6) sans contact, cependant très près, et adapté aux courbures de la paire de rouleaux d'extraction (6).
  4. Dispositif selon revendication 2 ou 3,

    caractérisé par le fait
    que les ouvertures d'aération sont des trous (26).
  5. Dispositif selon revendication 2 ou 3,

    caractérisé par le fait
    que les ouvertures d'aération sont des fentes (27).
  6. Dispositif selon revendication 2 ou 3,

    caractérisé par le fait
    que le tuyau de guidage de fil (15c, 15.1c), à l'extrémité dirigée vers la paire de rouleaux d'extraction (6), est entouré d'un tuyau d'aération (33), dont le diamètre intérieur (B) est plus grand que le diamètre extérieur (C) du tuyau de guidage de fil, de sorte qu'il en résulte une ouverture d'aération en forme d'anneau (35) entre le tuyau de guidage de fil (15c, 15.1c) et le tuyau d'aération (33), et où le tuyau de guidage de fil (15c, 15.1c) pénètre dans le tuyau d'aération (33) avec un distance (E) prédéterminée par rapport à la paire de rouleaux d'extraction (6).
  7. Dispositif selon l'une des revendications 2 à 6,

    caractérisé par le fait
    que, dans la zone des ouvertures d'aération (26, 27, 35), un dispositif d'aspiration (24) est prévu enveloppant le tuyau de guidage (15a, 15.1a; 15b, 15.1b; 15c, 15.1c) de manière à ce que l'air soit aspiré régulièrement.
  8. Dispositif selon l'une des revendications 2 à 7,

    caractérisé par le fait
    que la moitié du tuyau de guidage de fil (15a, 15.1a; 15b, 15.1b; 15c, 15.1c) dirigée vers le moyen de filage par friction (3) est pourvue de buses de soufflage (16) qui produisent une composante de direction de soufflage qui est dirigée dans le sens d'extraction de fil.
  9. Dispositif selon revendication 1,

    caractérisé par le fait
    que l'embouchure de sortie du canal de soufflage (8.1) s'avance dans la zone de la rigole de guidage de fil (25).
  10. Dispositif selon revendication 2,

    caractérisé par le fait
    que le tuyau de guidage de fil est façonné de manière à avoir une section conique convergeante, vu dans le sens de déplacement de fil.
  11. Dispositif selon l'une des revendications précédentes,

    caractérisé par le fait
    que des moyens (29, 30, 31, 32) sont prévus pour ouvrir la paire de rouleaux d'extraction de fil (6) lors d'une rattache.
EP88106851A 1987-04-29 1988-04-28 Procédé et dispositif pour attacher un fil dans une machine de filature du type à friction Expired - Lifetime EP0289028B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88106851T ATE67532T1 (de) 1987-04-29 1988-04-28 Verfahren und vorrichtung zum anspinnen eines garnes an einer friktionsspinnvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH169587 1987-04-29
CH1695/87 1987-04-29

Publications (2)

Publication Number Publication Date
EP0289028A1 EP0289028A1 (fr) 1988-11-02
EP0289028B1 true EP0289028B1 (fr) 1991-09-18

Family

ID=4216442

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88106851A Expired - Lifetime EP0289028B1 (fr) 1987-04-29 1988-04-28 Procédé et dispositif pour attacher un fil dans une machine de filature du type à friction

Country Status (7)

Country Link
US (1) US4856269A (fr)
EP (1) EP0289028B1 (fr)
JP (1) JPS63282317A (fr)
AT (1) ATE67532T1 (fr)
BR (1) BR8801989A (fr)
DE (1) DE3864890D1 (fr)
IN (1) IN171023B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5353582A (en) * 1988-04-14 1994-10-11 Rieter Machine Works, Ltd. System for controlling the movement of an elongated textile structure

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE331868C (de) * 1921-01-15 Schanzenbach & Co G M B H G Elektrische Handlampe mit Drehschalter
ATE20253T1 (de) * 1983-04-12 1986-06-15 Rieter Ag Maschf Falschdralleinheit.
IN165403B (fr) * 1984-09-25 1989-10-07 Rieter Ag Maschf
DE3522556A1 (de) * 1985-06-24 1987-01-02 Rieter Ag Maschf Verfahren zum anspinnen eines garnes an einer friktionsspinnvorrichtung
IN168013B (fr) * 1985-10-31 1991-01-19 Rieter Ag Maschf
JPS62117830A (ja) * 1985-11-15 1987-05-29 Murata Mach Ltd 紡績糸の製造装置

Also Published As

Publication number Publication date
US4856269A (en) 1989-08-15
IN171023B (fr) 1992-07-04
DE3864890D1 (de) 1991-10-24
EP0289028A1 (fr) 1988-11-02
BR8801989A (pt) 1988-11-29
ATE67532T1 (de) 1991-10-15
JPS63282317A (ja) 1988-11-18

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