EP0515762A1 - Verfahren zum Zentrifugalspinnen - Google Patents

Verfahren zum Zentrifugalspinnen Download PDF

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Publication number
EP0515762A1
EP0515762A1 EP91500048A EP91500048A EP0515762A1 EP 0515762 A1 EP0515762 A1 EP 0515762A1 EP 91500048 A EP91500048 A EP 91500048A EP 91500048 A EP91500048 A EP 91500048A EP 0515762 A1 EP0515762 A1 EP 0515762A1
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EP
European Patent Office
Prior art keywords
wire
bundle
spinning
pot
branch
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Withdrawn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
EP91500048A
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English (en)
French (fr)
Inventor
Carlos Pujol-Isern
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP91500048A priority Critical patent/EP0515762A1/de
Priority to JP13104892A priority patent/JPH05163621A/ja
Publication of EP0515762A1 publication Critical patent/EP0515762A1/de
Withdrawn legal-status Critical Current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
    • D01H1/08—Spinning or twisting machines in which the product is wound-up continuously cup, pot or disc type, in which annular masses of yarn are formed by centrifugal action

Definitions

  • the present invention relates to a centrifugal spinning process in which the bundle of fibers produced from a drawing train is deposited against the lateral face of a pot driven in rotation, the bundle is cut upstream of this pot as soon as 'a certain length of wire is accumulated against this wall, one directs one of the cut ends, forming the end of this length of wire thus accumulated towards a storage reel and one directs the other cut end against the lateral face of a second pot driven in rotation, the beam is cut again as soon as a certain length of wire is accumulated against the side wall of this second pot and this cycle is repeated continuously.
  • Centrifugal spinning is a spinning process the idea of which was proposed by a certain de Feranti in 1904 already.
  • the advantage of this spinning mode lies essentially in the fact that it avoids the friction problems of the continuous ring-cursor system and can therefore reach much higher speeds with excellent quality of the thread.
  • this device comprises a fiber bundle supply conduit which has two branches, each of which leads to a pot.
  • Each branch includes a beam cutting device and pneumatic means are intended to direct a cut end into the other branch while other pneumatic means send the other cut end forming the end. of the length of wire formed in the first pot, in a discharge conduit which leads to a winding device.
  • the wire With this spinning mode, the wire is twisted in two phases: when it enters the pot and when it leaves it. It follows that the wire in the pot has about 50-60% of the final twist.
  • the torsion induced during the first phase being lower than that induced with the ring-cursor process for example, the torsion rises less along the yarn and the lack of cohesion between the fibers does not allow general not to ensure the continuity of the process, which partly explains why this process has no industrial application, despite the fact that it makes it possible to obtain a high quality yarn at a high production speed due to the fact that 'it eliminates the friction problems of the ring-cursor system.
  • Pneumatic air jet spinning is another spinning mode that has been talked about for a while as a very promising system, particularly in terms of productivity.
  • the bundle of fibers formed at the exit of the stretching train is taken in a first vortex helical directed in one direction then in a second vortex holico ⁇ dal directed in opposite direction.
  • the object of the present invention is to remedy the drawbacks of the above-mentioned spinning methods.
  • the subject of this invention is a centrifugal spinning process according to claim 1, as well as a spinning loom, according to claim 2.
  • This process makes it possible to induce a pretortion on the bundle of fibers leaving the stretching train, sufficient to bring it into the spinning pots where it receives the real twist.
  • This process also makes it possible to pass the bundle of fibers from one pot to another, despite the cutting of the bundle which must occur to allow this change of pot and thus eliminates the connection between the bundle of fibers leaving the drawing train and the means that communicate part of its twist to it. Thanks to this process, there is therefore no break in the spinning despite the break in the bundle and the pretortion communicated to it is sufficient to bring the released end of the bundle into the other pot, where the centrifugal spinning process takes place. continues.
  • this pretorsion is also essential to add to the twist that goes up the wire from the pot and communicate it sufficient cohesion to allow it to pass from the outlet of the drawing train to the centrifugal spinning pots without breaking.
  • the thread is constantly twisted in the same direction so that the twist affects all of the fibers making up the thread.
  • Figure 1 is an elevational view partially in section of this spinning device.
  • FIG. 2 is a sectional view along line II-II of a detail in FIG. 1.
  • FIG. 3 is an enlarged partial view of FIG. 1.
  • FIG. 4 is a partial enlarged view of a detail of FIG. 3.
  • Figure 5 is a perspective view of a spinning device similar to that of Figure 1 with formation of a continuous wire and winding of this wire.
  • FIG. 1 The portion of spinning loom illustrated in FIG. 1 represents only a centrifugal spinning unit of a spinning loom. Only the parts necessary for understanding the invention have been illustrated without regard to the drive mechanisms which are well known to those skilled in the art.
  • the device which is part of a spinning loom comprises a pair of rollers 1, 2 for feeding the bundle of fibers.
  • One of these rollers 2 is integral with a drive shaft 3 driven in rotation by the motor mechanism of the spinning loom.
  • the rollers 1 and 2 constitute the last pair of rollers of a drawing train (not shown).
  • This feed member comprises a duct 5 whose inlet is conical for receiving the bundle of fibers leaving the stretching train and which is divided into two branches 6 and 7.
  • nozzles 8 open tangentially along the duct 5. These nozzles 8 communicate with an annular supply channel 9 which itself communicates with the outside via an opening 10 intended to connect the nozzles 8 to a source of pressurized air (not shown). As illustrated in FIG. 1, these nozzles 8 are inclined relative to the axis of the conduit 5. Taking into account this inclination and the fact that these nozzles open tangentially in the conduit 5, they induce in this conduit a helical flow directing towards branches 6 and 7.
  • a drawer 11 is slidably mounted in a housing 12 of the supply member.
  • This drawer has two passages 13 and 14 which are arranged so as to connect the conduit 5 respectively with the conduits 6 and 7, in the two limit positions that the drawer can occupy in the housing 12.
  • Two openings 15 and 16 are formed respectively at the two ends of the housing 12 for connecting it by two separate supply lines 17 respectively 18 selectively to a source of pressurized air (not shown) via a control valve 19, so that the drawer 11 can be moved between its two limit positions to connect the duct 5 either with the duct 6 or with the duct 7.
  • the space separating the entries from the passages 13 and 14 of the drawer 11 is slightly less than the diameters of the duct 5 so that by moving the slide 11 between its two positions, the pressurized air can still flow in the conduits 6 and 7 and is not discharged against the current in the conduit 5, this which would interrupt the spinning process.
  • the edges of the inlet openings of the passages 13 and 14 move relative to the outlet opening of the duct 5 which allows the fiber bundle to be sheared .
  • the face of the drawer 11 located between the outlets of the passages 13 and 14 provides a clearance 11a with the wall of the housing 12 to avoid pinching the end of the bundle of fibers which has been cut.
  • each branch 6 and 7 leads to a centrifugal spinning pot 20 respectively 21 passing through an extraction member 22 respectively 23.
  • These pots are driven in rotation by means (not shown).
  • the tubular parts 24 respectively 25 leading to the extraction members 22, 23 in the respective pots 20 and 21 is surrounded by a telescopic tube 26 respectively 27.
  • These telescopic tubes are integral with a support 28 driven in an alternating vertical movement as indicated by the double arrows F, by a drive mechanism of the machine (not shown).
  • the lower ends of these telescopic tubes 26, 27 are therefore displaced along the longitudinal axes of the centrifugal spinning pots 20, respectively 21, in order to distribute the wire exiting at the base of this telescopic tube, along the internal lateral faces. centrifugal spinning pots 20 and 21.
  • Each telescopic tube 26, 27 is surrounded by a sleeve 29 respectively 30 which aims to provide at its end a flared profile 31 for example, as illustrated in FIG. 4, serving to guide the bundle of fibers before it leaves the end of this sleeve 29 to deposit on the internal face of the pot 20.
  • This flared profile 31 is connected to the external lateral face of the sleeve 29 by a convex profile 32.
  • This shape of the lower end of the sleeve 29 has has been studied in order to prevent the bundle of fibers emerging therefrom from wrapping around this sleeve, in particular during the descent of the telescopic tube 26, when the bundle of fibers makes an acute angle with the external face of the sleeve 29 .
  • Two evacuation conduits 33, 34 exit from the extraction members 22 respectively 23 and terminate in a reel for storing the wire 41 produced in the pots 20 and 21.
  • Nozzles 35 and 36 selectively connected to the source of pressurized air (not shown) by the supply conduits 18 respectively 17 open into the conduits 6 respectively 7 by forming an oblique angle directing the air jet in the evacuation conduits 33 respectively 34.
  • Two shutters 37 and 38 are slidably mounted in the extraction members 22 respectively 23 parallel to the conduits 6 respectively 7, just at the junction of the extraction conduits 33 respectively 34.
  • shutters 37 and 38 are each integral with a pneumatic actuating device 39 respectively 40 comprising a cylinder and a double-acting piston, connected in inverse relation to one another to the supply conduits 17 and 18, so that one of the obturates urs closes its exhaust duct while the other opens it and vice versa, as illustrated in Figure 1.
  • a pneumatic actuating device 39 respectively 40 comprising a cylinder and a double-acting piston, connected in inverse relation to one another to the supply conduits 17 and 18, so that one of the obturates urs closes its exhaust duct while the other opens it and vice versa, as illustrated in Figure 1.
  • Figure 5 shows a variant according to which it is possible to produce a continuous yarn with the centrifugal spinning process object of the invention.
  • first wire reserve device 43 of known type which makes it possible to feed and extract wire at variable speeds.
  • a device for reattaching wires 42 which is preferably a reattaching device such as that described in EP-A1-0 249 578 belonging to the applicant.
  • This reattachment device is followed by a second known wire supply device 43a.
  • These known wire reserve devices are, for example, of the type described in US Pat. No.
  • Such a feeding device makes it possible to receive wire at variable speed and, thanks to its reserve, to supply it simultaneously at another speed.
  • a reel 44 associated with a winding shaft 45 driven by the drive mechanism of the spinning loom continuously receives the thread leaving the feed device with reserve of thread 43a.
  • the winding speed corresponds to the spinning speed.
  • the drawn bundle of fibers leaving the drawing train 1,2 enters the duct 5 of the supply member 4 and is subjected to the helical force induced by the air flows leaving the nozzles 8.
  • the pressurized air carrying with it the wire is directed into that of the branch lines which is open, that is to say that which is connected to the conduit 5 by a passage 13 or 14.
  • the branch 6 which is open.
  • the wire which has undergone a pretortion in the conduit 5 then passes through the conduit 6, passes through the extraction member 22 and terminates in the centrifugal spinning pot 20 at the outlet of the telescopic tube 26 animated by a vertical movement in an alternating direction to distribute the wire against the internal side wall of this spinning pot.
  • the valve 19 switches the source of pressurized air from the supply duct 17 to the supply duct 18
  • the drawer 11 is pushed from left to right in the housing 12, thereby cutting the wire and simultaneously communicating the conduit 5 with the branch 7 through the passage 14.
  • the air which can no longer flow into the branch line 6 then goes to the spinning pot 21 through branch line 7, the ejection member 23, the conduit 25 and the telescopic tube 27.
  • pressurized air is sent into the evacuation channel 33 through the nozzle 35 to direct the released end of the wire into the evacuation duct 33 and to draw the wire out of the spinning pot. 20. Since the latter continues to rotate during the wire extraction operation, an additional axial twist is induced on the wire, so that the twist occurs both when entering and exiting the spinning pot centrifugal.
  • the spinning of the bundle of fibers continuously leaving the stretching train continues in the centrifugal spinning pot 21.
  • the new end linked to the thread leaving the stretching train does not receive plus the twist that goes up from the centrifugal spinning pot.
  • the pretortion which is thus induced on the fiber bundle as it leaves the drawing train, gives it sufficient cohesion to allow the beam to be brought into the second centrifugal spinning pot 21.
  • FIG. 5 illustrates a solution making it possible to transform this spinning process by nature discontinuous into a continuous process starting directly from a ribbon R of fibers carded, as in an "open-end” spinning process, but with a wire quality equal to or even superior to that of a ring-cursor system.
  • the wire is brought from a pot 20 respectively 21 to the first wire reserve device 43.
  • Another length of wire is stored on the second wire reserve device 43a which continuously feeds the spool 44.
  • the front end of the length of wire being wound on the wire reserve device 43 is brought directly into the reattachment device 42. This already retains the rear end of the wire stored on the wire reserve device 43a.
  • the two ends are connected as described in EP-A1-0 249 578 while the wire is wound on the first wire reserve device 43 and extracted from the second wire reserve device 43a to feed the coil 44 continuously.
  • the winding speed of the reel 44 corresponds exactly to the speed of production of the wire.
  • the second wire reserve device must have a higher storage speed than the production speed to take account of the downtime required for the reattachment.
  • the first wire reserve device performs storage during the reattachment but it can only be emptied once the reattachment is finished and therefore at the same speed as the wire is stored on the second wire reserve device 43a. It is therefore also necessary that its storage speed be higher than the speed of production of the yarn, since it must be loaded and unloaded during the filling time of a centrifugal spinning pot.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP91500048A 1991-05-22 1991-05-22 Verfahren zum Zentrifugalspinnen Withdrawn EP0515762A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP91500048A EP0515762A1 (de) 1991-05-22 1991-05-22 Verfahren zum Zentrifugalspinnen
JP13104892A JPH05163621A (ja) 1991-05-22 1992-05-22 遠心精紡方法及び精紡機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91500048A EP0515762A1 (de) 1991-05-22 1991-05-22 Verfahren zum Zentrifugalspinnen

Publications (1)

Publication Number Publication Date
EP0515762A1 true EP0515762A1 (de) 1992-12-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91500048A Withdrawn EP0515762A1 (de) 1991-05-22 1991-05-22 Verfahren zum Zentrifugalspinnen

Country Status (2)

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EP (1) EP0515762A1 (de)
JP (1) JPH05163621A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5369946A (en) * 1992-02-14 1994-12-06 Pujol-Isern; Carlos Continuous centrifugal spinning method and spinning frame for practicing the method
EP0651078A1 (de) * 1993-11-03 1995-05-03 Carlos Pujol-Isern Verfahren zum Zentrifugalspinnen
WO1997008367A1 (de) * 1995-08-24 1997-03-06 Csm-Sächsische Spinnereimaschinen Gmbh Zentrifugenspinn-spulmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3314223A (en) * 1962-10-30 1967-04-18 Bobkowicz Emilian Apparatus for yarn production
US3343358A (en) * 1967-01-17 1967-09-26 Maremont Corp Pot spinning and twisting apparatus
DE3732708A1 (de) * 1987-01-15 1988-07-28 Stahlecker Fritz Luftduese fuer pneumatisches falschdrallspinnen mit einem aus wenigstens zwei teilstuecken gebildeten fadenkanal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3314223A (en) * 1962-10-30 1967-04-18 Bobkowicz Emilian Apparatus for yarn production
US3343358A (en) * 1967-01-17 1967-09-26 Maremont Corp Pot spinning and twisting apparatus
DE3732708A1 (de) * 1987-01-15 1988-07-28 Stahlecker Fritz Luftduese fuer pneumatisches falschdrallspinnen mit einem aus wenigstens zwei teilstuecken gebildeten fadenkanal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5369946A (en) * 1992-02-14 1994-12-06 Pujol-Isern; Carlos Continuous centrifugal spinning method and spinning frame for practicing the method
EP0651078A1 (de) * 1993-11-03 1995-05-03 Carlos Pujol-Isern Verfahren zum Zentrifugalspinnen
WO1997008367A1 (de) * 1995-08-24 1997-03-06 Csm-Sächsische Spinnereimaschinen Gmbh Zentrifugenspinn-spulmaschine

Also Published As

Publication number Publication date
JPH05163621A (ja) 1993-06-29

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