Method of threading in a thread into a texturing nozzle and apparatus for implementing the method

The present invention concerns a method and an apparatus for threading in a running thread into a texturing nozzle.

In threading in a thread during the start-up of a draw-textur- ing machine the thread is taken manually off a creel bobbin package, i.e. the thread is not supplied continuously. In this process the thread introduced and inserted manually into the inlet opening of the texturing nozzle is sucked through the texturing nozzle by a suction gun placed onto the thread exit opening of the texturing nozzle and subseguently is transferred to the following elements involved in the texturing process using the suction ^' gun which continually takes up the thread.

The manual method described above is not applicable, however, to such texturing nozzles used on a spin-draw-texturing machine as on this machine a thread is supplied at the operational speed already right from the start of the machine.

A draw texturing method already is known, in which a running thread is pulled into and through the narrow thread passage duct of an air jet texturing nozzle using a wire loop inserted through the thread passage duct (German DE-OS 21 64 802) . Such threading-in is tedious, as the thread first is to

through the wire loop using two suction guns. Furthermore, the speed of pulling the wire loop through the nozzle is no sufficient at high thread supply speeds, such that threadin in is not effected success/fully. The means for generating 5 high acceleration of the wire loop reguired are complicated and susceptible to defects. A further disadavantage is seen in the danger of damage to the inside of the texturing nozz by a bent wire loop.

Facilitating insertion of the thread also has been proposed (DE-AS 23 39 603) by adjustable width of the nozzle inlet opening, for which arrangement, however, a detachable insid member is reguired. Thus the nozzle inlet is complicated de and high manual skill of the Operator cannot be dispensed w

It thus is the object of the present invention to create a method and an apparatus using which a continously supplied thread in most simple and reliable manner is threaded in an pulled through the texturing nozzle and is transferred to t element without any additional member to be provided on the nozzle itself and without pulling through being reguired.

The object is achieved by the method characterized in claim and by the apparatus characterized in claim 3.

Advantageously, as characterized in claim 2, two or more th can be threaded in simultaneously.

The suction device can be provided as an integrated suction device which is tilted open for taking up the texturing nozzle, or as a mobile suction gun held in a holding device which is tilted open.

^■ If a suction gun is used, the ducts taking up the texturing nozzles can erge upstreams from the suction gun, in such

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manner that all threads are caught by one Single suction gun.

The invention is described in ore detail in the following with reference to illustrated design examples. It is shown in:

Fig. 1 a partial, semi-schematic view of a texturing machine,

Fig. 2 a front view of an apparatus of the texturing machine according to Fig. 1 shown opened,

Fig. 3 a ^' side view of the apparatus according to Fig. 2,

Fig. 4 a front view of an alternative design example of the apparatus according to Fig. 2, shown opened,

Fig. 5 a side view of the apparatus according to Fig. 4,

Fig. 6 a front view of the apparatus of the texturing machine according to Fig. 1, shown with the texuring nozzle,

Fig. 7 a front view of the apparatus according to Fig. 6, shown opened,

Fig. 8 a side view of the apparatus according to Fig. 7.

The partial view of the texturing machine according to Fig. 1 shows a not yet textured thread 1 supplied to a texturing nozzle 2 by a pair of drawrolls 3. The texturing nozzle 2 is held via its supply duct 4 in a holder 6 which is pivotable about a hinge pin 5 from a texturing position A into a threading-in position B. The pin 5 is rigidly mounted in a machine fra e member (not shown) . A controllable pneumatic cylindre 8, pivotable about a hinge pin 7, and its piston

rod 8a respectively, is pivotably connected via a further hinge pin 9 with the holder 6. A support member 10 taking u the pin 7 is rigidly connected to a machine frame member 11 The texturing nozzle 2 comprises a treatment chamber 13, kn from CH-PS 530' 89 and provided with the slots 12 and with delivery opening 14 for the thread la textured while passin through the nozzle.

The textured thread la after emerging from the texturing nozzle 2 is deposited onto a cooling drum 15 which rotates the direction of arrow C, and leaves this drum again in the direction of arrow D to be transferred by a mobile suction gun 18 onto the subsequent elements (not shown) also involv in the texturing method. An apparatus 17 mounted on a machi frame part 16 is provided with a duct part 19, and 20 respe tively (Fig. 2) , each substantially sealingly surrounding t treatment chamber 13 and the insertable mobile suction gun The duct parts 19 and 20 together form a continuous duct. The device furthermore comprises two housing parts (Figures and 3) , which can be pivoted open about a hingeshaft 21, in which arrangement the upper part 22 is rigidly connected wi the machine frame part 16 and the lower part 23 can be pivo down, i.e. towardsthe cooling drum 15. Pivoting of the lowe part 23 is effected by a controlled (not shown) pneumatic cylindre 24, which on one hand side via a hinge pin 25 is connected with a stationary machine fram part 26, and which on the other hand side via a hinge pin 27 is linked to the pivotable part 23. In the lower part 23 seals 28 are provid at the right hand side and the left handside of the duct parts 19 and 20 for avoiding penetration of air from the ou side into the duct parts.

In Figures 4 and 5 an apparatus 29 is shown as an alterna tive design example differing from the apparatus 17. The difference is seen in that using only one mobile suction

one thread each can be inserted into, or pulled through res¬ pectively, two texturing nozzles simultaneously.

The upper part 30 of the apparatus 29 and the lower part 31 in their closed State form the duct parts 32 and 32a respectively, which substantially seal and Surround a treatment chamber 13 the each, andjhe duct part 34 surroundingJmerging duct parts 33 and 33a and the mobile suction gun (not shown) . Lateral pene¬ tration of air from the surrounding room along the duct parts is prevented by the seals 35 and 36. The other parts of this apparatus, not designated specially, correspond to the parts of the apparatus 17.

In Figures 6 through 8 another apparatus 37 is shown, which can be applied instead of the apparatus 17 in the texturing machine according to Fig. 1. The closed apparatus 37 consist of an upper part 38 connected to a. machine frame part 16aand of a lower part 39, with one each of two texturing nozzles 2 and suction devices 40, respectively, held therein. In Figures 7 and 8 the apparatus 37 is shown in its opened State, with the ducts 41 and 41a respectively, which in the closed State of the apparatus 37 Surround the treatment chambers 13 sub¬ stantially sealingly. The suction devices 40 (one only being shown in Fig. 7) are integrated parts of the member 38. For preventing lateral penetration of air from the surrounding room seals 42 are provided on both sides and along the ducts 41 and 41a.

The other parts not designated specially correspond to the parts of the apparatus 17.

Threading in of a thread now is effected in the following manners:

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I: The apparatus 17 is opened, the texturing nozzle 2 is pivoted from its texturing position A into the threadi in position B by action'of the p eumatic cylindre 8, t activated mobile suction gun 18 is manually brought in the duct part 20 of the upper part 22 and is held ther until the apparatus 17 is closed again. Using a second mobile suction gun 43 (Fig. 1) the thread 1 supplied b the pair of drawrolls 3 is brought via a deflecting device 46 and via positioning pins 47 (one only shown) substantially at right angle to the inlet opening 44 of the deactivated texturing nozzle 2 and into a cutti device 45 arranged below. In this thread position the second mobile suction gun 43 is fixed relative to the Subseguently the thread is severed using the cutting device 45, where upon the thread passes via the textur nozzle into the suction gun 18, and then the suction g 18 again is held manually, the apparatus 17 is opened, the texturing nozzle is pivoted back to the position A and the thread 1 is transferred to the cooling drum 15 and on to the further elements reguired in the texturi . method using the suction gun 18.

I: In the use of the apparatus 29 the whole threading-in process is effected in analogy to the process steps described under I, .with the difference, however, that two texturing nozzles are surrounded by the apparatus and that two threads 1 can be threaded in simultaneous The threads 1, which are sucked in by the suction gun in common, but which are Coming in separately from the pair of draw rolls 3 are brought via additional positi ning pins (not shown) to a mutual distance correspondi to the distance between the nozzles, and in front of t texturing nozzles.

III. In the use of the apparatus 37 the threading-in of two threads, up to and including the step of severing the thread using the device 45 is effected in analogy to the process described under I or II. Subsequently, however, as differing from the process described under I or II, the suction gun 43 is used upon opening the apparatus 37 for taking over the threads sucked in by suction devices 40. This is effected by _^ sucking in one thread after the other using the suction gun 43 in the room E between the texturing nozzle and the suction device 40 and in severingwith a conventional anual cutting device, such as a pair of scissors, between the suction gun 43 and the suction device 40.

Both threads thus taken over by the suction gun 43 are transferred, after the two texturing nozzles are pivoted back into the position A, onto the cooling drum 15, and as described earlier on to the further ele ents. •

All Steps described under I,II,111 for threading in one or both threads, except the activation and overnents of the mobile suction guns, can be effected automatically controlled one sinσle by a control device (not shown) upon activating push- ^' button

(not shown) of this control device.

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