DE2365525A1 - DRAW TEXTURING MACHINE - Google Patents

Description

DR -INS. DIPL..ING.M.SC. DI Ρι _.- (- ΉΥα. D R ^1. ÜIPL.-PH VS.

HÖGER - LEGAL RIGHT-GRIESSBACH - HAECKER

PATENT LAWYERS IN STUTTGART

A 40 909 b
k-35

23.9.1974

Teljin Limited

1, Umeda, Kita-ku, Osaka-shi, Osaka Japan

Draw-texturing machine

The invention relates to a drawing-texturing machine for synthetic Fibers with a processing part for drawing and generating a false twist, the processing part of which is at least a feed roller for feeding an undrawn thread, a first heating device, a false twisting device for twisting of the thread, a first take-off roller, the one with a larger one

509829/0749

Λ 40 S09 b - 2 -

23 October 1974. ο ο e> tr r ο r

Peripheral speed rotates as the feed roller and the Pulling and feeding the thread is used, as well as a second heating device and a second take-off roller delivering the thread to a winder. Particularly concerned the invention with a drawing-texturing machine of this type, which is suitable, from an undrawn thread synthetic fibers to produce a full thread provided with a false twist, with the term "Undrawn thread" in the present description is also intended to include partially drawn threads.

Recently are trying to reduce production costs to reduce crimped threads or yarns straight from naughty Threads of synthetic fibers have been produced by simultaneous pulling of the undrawn thread and by texturing it. The devices for performing this process, i.e., the draw-texturing machines, exist generally of three parts, namely a material feed device on which the full thread packages are located or to which the full thread packages »are fed; a machining part for pulling and generating a false twist, which feed rolls for feeding undrawn threads to the processing part, a first heating device, false twisting devices, first take-off rollers for pulling or stretching the threads with a greater circumferential speed than that Includes feed rollers, a second heater, second take-off rollers, etc., and take-up devices that are suitable are to wind the threads on a take-up spool.

509829/0749

A 40 909 b. - 3 -

23.9.1974

The simple arrangement of these three devices, i.e. the material feed devices, the draw-false twisting devices

one above the other and the winding devices / leads to an enlarged Height of the machine and consequently considerable difficulties when threading the threads. In order to avoid these difficulties, it has been common practice to use a simple false twisting machine provide, as described, for example, in US Pat. No. 3,165,881, and in which the Processing part the material feed devices and the opening * Winding devices is arranged opposite. In such a machine, the threads are at the top of the processing part fed from the material feeders and removed from the winders at the lower end. Such However, the draw texturing machine still has a greater height than a simple false twisting machine and the difficulties remain in place during the threading process. Starting from the prior art described above, the present invention is based on the object of an improved To propose drawing-texturizing machine, which the disadvantages of the previously known. Machine of this type avoids and in particular facilitates the threading process.

This task is carried out by a drawing-texturing machine of the introduction described type. solved, which according to the invention thereby is indicated that the processing part is marked by a Intermediate floor reaches through that material feed devices on opposite sides of the upper, part of the processing part are arranged on the intermediate floor that between the material feed devices and the upper part of the processing part, a first working floor (threading floor) is provided that on opposite sides of the lower one

509 8 29/0 74 9

A 40 »09 b - 4 - ■. ,:

September 23, 1974 2365525

Part of the processing part on a basic working level of the machine winding devices are arranged and that between a second working floor (threading floor) is provided for the lower part of the processing part and the winding devices is under which the thread can be passed.

It has to achieve a steady and fast Proven operation to be advantageous if thread breakage detectors are also used and automatic control devices for the operating speed during the threading process are provided are, as a result of which the practical application possibilities for the drawing-texturing machine according to the invention are further improved permit.

It has also proven beneficial to make heating devices more special To use construction that both facilitate the threading process and have an improved heating effect. It is also advantageous to provide a special thread guide which is located behind the false twisting devices and the twist is improved.

Further details and advantages of the invention are provided below explained in more detail with reference to a drawing and / or are the subject of the claims for protection. In the drawing show:

1 shows a side view of a drawing-texturing machine according to the invention;

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23.9.1974

Fig. 2A side views of a preferred exemplary ^1S approximate shape of a threading device for the pull-Texturieritiaschine according to Fig.1,

2E shows a side view of a further embodiment of a threading device for the Drawing-texturing machine according to Figure 1;

3A is a perspective view of a

Side view, with individual parts broken away for clarity or a Plan view of a thread guide element of the threading device according to FIGS. 2A to 2D;

Fig. 4 is a plan view of a thread guide rod

the threading device according to FIGS. 2A to 2D;

Fig. 5 is an enlarged side view of the false twisting devices the drawing-texturing machine according to Figure 1 a soundproof cover and supply and discharge devices for air, with some parts broken away for clarity;

6 shows a cross section through the second heating device for the drawing-texturing machine according to FIG Fig.1;

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23.9.1974

Fig. 7A side views of a special yarn guide element, which directly below the false twisting devices of the drawing-texturing machine according to FIG is arranged and serves to improve the twist, the illustration according to FIG 7B is significantly enlarged;

8A shows a side view of a thread breakage detector for a drawing-texturing machine according to FIG Fig.1;

FIG. 8B shows a cross section through the thread breakage detector according to FIG. 8A, specifically longitudinally the line XII-XII in this figure;

9A shows a schematic representation of the drive devices for the drawing-texturing machine according to FIGS. 1 and

Fig. 9B is a block diagram of the drive devices according to Fig. 9A.

50982970749

A 4o 909 b

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23.9.1974

The drawing-texturing machine according to the invention, which is shown in Fig. 1 -shown has a machining part with a frame 1, which stands on a base 2, which in turn is at a basic level of work Fo. The upper Part of the frame 1. Stands over an intermediate floor Fl above the basic work level Fo.

The processing part comprises feed rollers 3, which are horizontal Transverse frames are carried on the frame 1, a first contact type heater H, two false twisting devices 5, such as e.g. false twist tubes, two take-off rollers 6, a second heating device 7 of the non-contact type and second take-off rollers 8, with all the components mentioned on the frame 1 are mounted. Such an arrangement does not lead to any significant design change compared to conventional false twist machines. However, since the first heating device 4 as well as the second heating device 7 have a length of more than 1 m and a cooling zone between about 0.5 and 1 m in length between the first heating device and the false twist devices 5 is required, the machining part reaches a height of approximately 5 m, measured from the B'as is working level Fo to the tip of the processing part can, for example, false twist tubes, with friction operating bottle twist units and false twist units operating with a pressure medium flow.

A material feed device designated as a whole by the reference numeral 9 is arranged on the false ceiling Fl and has a frame 9a to which mandrels 9b are attached, each of which can pick up a thread package. The individual mandrels 9b are pivotable on a vertical frame element 9c mounted so that a mandrel can be swiveled to the rear of the frame when a new thread package is to be attached, so that the refilling of thread packages from the back of the

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23.9.1974

Frame can be done.

The working space Sl between the upper part of the machining part and the material feed device 9 is used for the first Threading in and the part of the intermediate floor Fl lying within this area serves as the threading floor Fa. The naughty The yarn or the yarn Y, which is drawn off from the respective yarn packages, is consequently introduced into yarn guides 9d and 9e, which are provided on the front and above the material feed device 9 and is then in the upper area of the work space Sl is inserted into a guide Io of the machining part, from where it arrives at the feed rollers 3. Between the guides Io and the feed rollers 3 are each one Cutting device 5 9 provided for the thread.

The winding devices 11 of the drawing-texturing machine according to FIG of the invention are based on the basic work level Fo opposite sides of the machining part. Every Winding device 11 has a frame lld, on which spool holders 11a are mounted, which the winding spools wear, on which further friction rollers 11b of a shaft train system are mounted, which drive the take-up spools by friction and on which finally transverse guides lic are mounted, which the delivered thread in the transverse direction on the take-up reels, with the take-up units arranged in two or three stages. Threading the Threads in the individual winding units are carried out from the front of the winding devices from the work space S2 between the lower part of the processing part and the winders 11 while removing the finished Packages, i.e. the removal of the full take-up spools from the rear of the take-up devices 11 takes place. The second Work space S2 has a second threading floor and F2.

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k - 1B3

23.9.1974

Thread guide or the thread path leads between the second take-off rollers 8 and the winding devices 11 under the through the second threading tray F2. Accordingly are below of the second threading bottom F2 and in the vicinity of the same guides 12a and 12b attached and the thread is from the second take-off rollers 8 guided over the guides 12a and 12b and from the latter 'up to the guides He each winding unit. The thread is then passed through the appropriate cross guide lic to the assigned take-up reel to form a package. Between the guides 12a and 12b is in each case a thread breakage detector 5 8 is provided. On the second threading floor F2 slots are provided through which the thread can run, so that a simple threading from above of the threading base is possible. (Reference numeral 13 in Fig. 1 denotes oil devices.) Similarly, the Thread path formed between the material feed devices 9 and the feed rollers 3 above the first threading base Fa so that a simple and quick threading in the work space S1 can take place. The false twisting devices of the draw-texturing machine are arranged along the machining part on opposite sides. Similarly, the thorns are the Material feed devices 9 and the winding devices are arranged corresponding to the false twisting devices 5, and along the material feed devices 9 and along the frame Hd of the winding devices 11.

During the threading process for the draw-texturing machine, one pulls Operator on the first threading tray Fa a thread from a thread package in the material feed device 9 and guides this one after the other through the yarn guides 9d and 9e as well as through the guide Io between the feed rollers' 3 and through the first heating device 4 to the underside of the threading floor Fa. When the thread has been threaded this far, another operator will pull it on the second threading

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23.9.1974

floor. F2, - the, ie the second work space S1. Is threaded into the, false twisting devices 5 between the first take-off rollers through the second heating device 7 between the second take-off rollers 8 and through the guides 12a, 12b and 12c, and then _; around the take-up spools of the take-up unit ep, whereby the threading process is ended. Another possibility is that the thread, which is drawn off from the thread package in the material feed device 9 , is guided through the thread guide 9d and from there by means of the above-described devices under the underside of the first threading tray Fa through to - the leadership Xo ,. -... ".

During the threading process, if the undrawn thread is in direct contact with the first heating device * + there is a great danger that the thread will break. Around To avoid this disadvantage, a special threading device is used.

The next step is to fix the texturing serving heating device of the drawing-texturing machine according to the Invention to be considered in more detail. In general, this heater is heated to an extremely high temperature (in the case of polyester fibers, for example, the temperature is increased to about 2O0 ° C raised) j so that the undrawn thread if he touches the heating device, is weakened so far by the action of heat that a thread break occurs immediately. For the In the event that the thread is at such a high temperature that it is given by the heating device, after the start of the drawing, Process is stretched or pulled, is the duration of contact between the undrawn thread and the heating device very briefly, even if the thread comes into contact with the heating device once, while the thread is in front of the point of contact is only heated to the drawing temperature. On the other hand, the false twist can be generated without difficulty

509820/0749

A 4o 909 b

k - 163

23.9.1974

be carried out even though the thread is below the point of contact is heated to the temperature for fixing the false twist, since the thread is already pulled at this point in time is. In contrast, during the threading process ^ gangs, as the thread is not being pulled, difficulties in generating a false twist, i.e. if the thread happens to be touches the hot heater, it breaks very quickly. Accordingly, many attempts have been made to To avoid these threading difficulties, a method has been found by which the undrawn thread is kept at a distance from the heating device during the threading process, while after the beginning of the pulling process it is kept at a distance from the heating device Contact with the heating device is brought.

The threading process and the device for its implementation, with which or with which the difficulties described above are to be avoided, is explained below explained in more detail with reference to FIGS. 2A, 2B, 2C and 2D. In these figures are corresponding. Parts with the same reference numbers provided, as in Figures 1 to 3. In Figures 4A to 4D an apron type feed roller 3a is provided, as well as a first heating device 4a with grooves, a false twisting device 5 in the form of a false twist tube and a first take-off roller 6a of the apron type. The first take-off roller 6a rotates at a higher peripheral speed than that Feed roller 3a to pull the thread. The ratio of Peripheral speeds of the first feed roller and the second take-off roller is preferably between about 1.3 and 3.0. A The pivot element 15 is pivotably mounted on a pivot pin 16, the pivot pin 16 being provided on a block 14 is, in turn, firmly on the heating device 4a is mounted. On the pivot element 15, a cam element 17 is attached, which has a groove 17a on its front Receipt of the thread and which on its back

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is provided with a curved path 17b, as shown in FIGS. 3A, 3B and 3C. When the pivot member 15 to the Pivot pin 16 pivots, which is located between the first draw roller 3a and the first heating device 4a, the cam element 17 pivots in the direction of an associated groove of the first heating device 4a. On the top of Cam element 17, a thread guide roller 18 is mounted. Furthermore, a lever 19 is provided which is fixed to the pivot element 15 is mounted and which is provided with an elongated L-shaped grooved cam track 19a into which a Sensing element 2o loosely engages. A rod 21 extends through an elongated opening or a longitudinal bore 2 2b in the first heating device 4a, and the rod 21 can move in the longitudinal bore 22b in the vertical direction, wherein the Sensing element 2o is pivotally attached to the upper end 21a of the rod 21 by means of an arm 23. At the lower end 21b of the Rod 21 is mounted on an arm 24 which carries a pivotable scanning element 25. The sensing element 25 engages in turn in an L-shaped incised cam track 27a of a lever 27-a, which can be pivoted about a pivot pin 26. At A pivot element 28 is fixedly mounted on the lever 27, the free end of which is angled and has an indentation 28a. The pivot element 28 can be pivoted like the pivot element 17, namely around the pivot pin 26. The rod 21 is at its lower end carried by an operating lever 3o, which in turn of one on the frame of the processing part in the Near the heating device 4a attached pin 29 is pivotally supported. The rod 21 can so with the help of the operating lever 3o are moved up or down, wherein the scanning elements 2o and 25 together with the rod 21 to move up or down. If the actuating lever 3o is moved upwards in the exemplary embodiment under consideration, it arrives the upper sensing element 2o in the incised curved path

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k - 163
23.9.1974

19a into a position above the pivot pin 16, while the sensing element 2 5 arrives at the end of the incised cam track 27a which is furthest away from the pivot pin 26, the one facing away from the pivot pin 26
Legs of the L-shaped incised cam path 27a runs essentially parallel to the rod 21.

When the operating lever 30 is then lowered, as shown in ^FIGS . 2.B and 2C, the front part of the L-shaped cam 19a runs. in which the upper scanning element 20 slides loosely, parallel to the .Stange 21, before the lower scanning element 25 has reached the inflection point of the L-shaped curved path 27a, and the sensing element 25 is still in the part of the curved path 27a which is parallel to the Rod 21 runs. When the actuating lever 30 is then lowered further, the scanning element 25 passes the knee point of the cam track 27a, as shown in FIG. 2D. Although not shown in the drawings, the operating lever 30 is preferably operated stepwise and is provided with a locking mechanism.

For the threading process, the operating lever is like this Fig. 2A shows, brought to its uppermost position, the Curve element 17 and the pivot element 28 are located at a distance from the first heating device 4a. The naughty one Yarn Y is thereby over the outside of the pivot element 28 and not held by the scroll '3a. Thereafter the thread is drawn through a guide 31 and then into the not yet driven false twisting device 5 threaded, whereupon the thread end is sucked into a suction device and then from the feed roller 3a is being held. If the thread Y, which by then is slack

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hung between the feed roller 3a and the pivot member 28, is sucked into the 'suction device, it is stretched and slides over the rear curved curved path I7d 'of the cam element 17 and possibly in the groove-shaped guide 17a at the front end of the cam element 17. If in this operating state of the operating lever 30 is lowered, the rod 21 is lowered so that the upper Sensing element 20 while it slides through the cam track 19a gets into a lower position. The curve element is thereby used 17 pivoted about the pivot pin 16 counterclockwise. This has the consequence that the thread at the upper end of the first grooved heating device 4a by a Slot in the housing 22 of the heating device close to the heating surface -22a of the same and is heated there to a temperature that makes it ductile.

The thread is then pressed against the false twisting device 5 in order to initiate the sawing and false twisting process. At the same time, the thread begins to be drawn off by the first draw-off roller 6a. . ·

As mentioned above, the first take-off roller 6a rotates at a higher peripheral speed than the feed roller 3a. However, since the thread Y between the rollers 3a and 6a is heated by the grooved first heater 4a, a cross-sectional tapering results in the areas of the thread Y heated in this way and the thread Y is on this Way pulled or stretched. At this point in time there is the curved path 27a, in which the lower scanning element loosely engages, but with its long leg still in

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a position parallel to the rod 21 and the pivot element 28 is still in its starting position.

If now, as FIG. 2C shows, the actuating lever 30 is lowered further, then the cam element 17 is rotated even further until the cam path 19a is essentially parallel runs to the rod 21. Meanwhile, the long bow remains the cam track 27a is still parallel to the rod 21 and the pivot element 28 maintains its position. on the other hand During these operations, the cam element 17 moves the yarn Y slowly against the upper part of the heating surface 22a the grooved first heater 4a. Since thread Y is already being pulled at this point, like this has already been described above, there is no risk of the thread breaking even if it is the first heating device 4a touched. Rather, the yarn Y is further heated in order to obtain taper points.

When the actuating lever 30 finally moves into the position shown in FIG. 2D is lowered, i.e. to its lowest position, the upper end of the cam track 19a is parallel to the Rod 21 aligned, while the sensing element 20 only slides through the cam track 19a and the cam element 17 is not moved. If, on the other hand, the lower sensing element 25 slides beyond the inflection point of the cam track 27a, then the pivot element 28 is pivoted counterclockwise do the pivot pin 26 and now presses the thread Y. against the heating surface 22a of the first heating device 4a, which is provided with grooves. The thread can now be completely heated by the heating device and between the Feed roller 3a and the first take-off roller 6a are pulled,

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so that the false twist which is given to the thread Y by the false twisting device 5 is fixed.

While an embodiment has been described above, at. which during the movement phase the cam element 17 is operated in front of the pivot element 28, so that the thread Y-first is pressed against the upper part of the heater 4a and then against the lower part thereof, it will be understood that with a suitable configuration of the scanning elements 2O and 2 5 and the cam tracks. 19a and 27a also that first Swivel element 28 can be actuated.

From the above description it becomes clear that in the threading device which is used in the drawing-texturing machine according to FIG the invention is used, a cam element is provided which has a groove-shaped guide on its front side for the thread, so that in the event that the thread is in the guide, there is no sagging of the Thread results when it is sucked into the suction device by the feed roller. On the other hand, the thread slips due to the tension exerted on it along the curved path of the curved element and automatically enters the groove-shaped Guide so that the thread is easy to thread and is guided properly. In an advantageous embodiment According to the invention, the cam element is arranged between the feed roller and the heating device, and the pivot element is arranged between the heating device and the false twisting device, so that the cam element and the lower Swivel element move the thread path perpendicular to the normal thread path when threading takes place. The downside more common Draw-texturing machines that result in frequent yarn breaks

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exists, can thus in a simple way and without special Skills are avoided, the threading can be done within a very short time, reducing the workload is greatly reduced and interference is avoided, so that overall there is an increased productivity.

In a modified embodiment of the threading device, which Fig.2E shows, the threading. Successful take place in a similar manner as in the embodiment of a threading device described above. At the threading device according to Fig. 2'F. becomes a pivot member 15a when the actuating lever 30a is lowered, it is pivoted about a pivot pin 16a on a block 14a and one with the pivot element 15a firmly connected lever 19b with an I-shaped incised cam track 19c is counteracted at the same time pivoted clockwise about pivot pin 16a. This has the consequence that the thread is in contact with the heating surface the first heater arrives.

In the drawing-texturing machine. According to the invention can also a simpler threading device can be used with success. For example, it can be a rod that can rotate about its axis be provided, which extends from the upper to the lower end of the first heating device. At the top and bottom of the pole guide rods can be fixedly mounted at a right angle to their axis of rotation. The thread can then come into contact with the heating surface of the first heating device can be brought by turning the rod and the guide rods from the outside leads into the area of the groove of the heating device.

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In the drawing-texturing machine according to the invention is as Feed roller for feeding the undrawn thread to the false twister used a roller with a rough surface. The filament leaves the aventurine surface of the feed roll on the underside of the same so that the thread prevents the thread from being wound onto the feed roller in the thread will. In the exemplary embodiment under consideration, compared to the lower part of the heating device 4a is a collecting device for excess yarn.

The drawing texturing device according to the present invention can, as far as it has been described so far, successfully prevent a yarn breakage when threading the undrawn yarn Y, namely when using a threading device of the above ' On the other hand, a thread breakage cannot yet be completely prevented. To this To solve the problem, research was carried out which led to the finding that the best results then can be achieved if the working speed of the drawing-texturing machine during the F.infädelvorcrangs to a Speed that is slower than normal working speed. Corresponding to this further characteristic According to the invention, the novel drive control for use in drawing-texturing machines is explained below is suitable and has exceptional practical advantages. In detail, the drawing-texturing machine includes according to the invention an electric main motor for driving the device for the thread feed and an electric secondary motor, which can be driven via a generator coupled to the main motor, and in turn the Drives false twisting devices. In addition to the main

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The motor for driving the thread feed devices is an electric one Auxiliary motor is provided, which allows the drawing-texturing machine to start operating with lower Drive speed. After the threading process has been completed, the speed of the main motor can be increased gradually can be increased by the starting circuit for the control circuit of the main motor when on from the auxiliary motor the main motor has been switched.

Preferably the speed is V (m / min), which here is referred to as low speed, in the range between 5 <T V_ <C 80 - De / 5, where De is the denier des Thread after it has passed the false twisting devices. As Fig.2B shows, during the threading process the thread is guided in such a way that it is kept away from the heating device so that the tapering marks do not appear concentrated in one point, but spread over the entire length. The incompletely drawn and textured one The thread runs behind the heating device through the false twisting devices, where as a result of the changing tension on the thread thread breaks can occur during processing. If the 'speed' rises above 80 - De / 5, this will be achieved Obtaining considerable importance. As Fig.2C shows, when moving the drawn and a false twist having Thread in the direction of the heating device a change in the position of the tapering points of the thread over its length to be expected to a high degree, which increases the possibility of the incompletely drawn and a false twist having thread touches the heating device directly, whereby that part of the thread that the heating device touched directly, considerably weakened by the effect of heat

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which leads to a thread breakage. On the other hand, if the .Speed V <5 m / min, there is only a low Probability of thread breakage. On the other hand, this thread speed is again too low, so that during the excessively long time required for threading results in very little effectiveness.

Under these circumstances, the drawing-texturing machine is switched off after the drawing-texturing process or the generation of false twist has started automatically switched to the main motor suitable for normal operation (high-speed operation), by using switching devices or timers and controlling the speed with the help of a start circuit in the Control circuit for the main motor gradually increased. In this way, the slave motor can be used to drive the false twisting devices follow the normal speed operation, eliminating the phenomenon of the occurrence of thread breakage during the increase in speed is reduced. Tests have shown that while increasing the speed a period of more than one second, preferably during a period of two seconds, the probability of thread breaks, regardless of the strength of the thread (50 to 150 denier) or the number of twists per meter (2500 to 3500).

The Fig. ■ .9Ά and .9B show an electric auxiliary motor 34, a speed reducer 35, a one-way clutch 36, and a pulley 37 for transmitting the power of the auxiliary motor to gearwheel assemblies 38 and 39. The reference numeral 40 denotes the contacts of a switch for starting or stopping

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of the auxiliary motor 34. In the feed circuit for the main motor 33 a magnet winding 41 is also provided, which is an embodiment represents for the starting circuit. The magnet winding 41 can with the aid of a switch connected in parallel are short-circuited with contacts 4 4, whereby the start circuit after the end of the start-up process (after the end of the Increasing the speed). There is also a generator 4 6 is provided which is suitable for the auxiliary engine 47 to drive, which is used to drive the false twisting devices. The generator 46 is with the gear arrangement 39 connected. In the embodiment under consideration, the generator 46 is an alternator and the slave motor .47 is a synchronous motor. When the drawing-texturing machine starts operating, the actuation of an actuation key (not shown) acts as an actuation of switching devices (not shown), via which the contacts 40 are closed (at this point in time the contacts 40 are open). After the contacts 40 are closed, the auxiliary motor 34 starts for the one starting at low speed To turn the starting process and drive the thread, through the reduction gear 35, the one-way clutch 36 and the Gear arrangement 38, while at the same time the generator 4 6 is driven via the gear arrangement 39, so that the Sub motor 47 can be driven at a low speed by the drive power generated by the generator 4 6 can. Thus, while the machine is running at a low speed, the threading operation is carried out. After the threading process has been completed, switching devices (not shown) are activated when the actuation button (not shown) is pressed. actuated, which contacts 43 close. (At this point in time the contacts 40 are open ») after closing

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of contacts 4 3, the main motor 33 starts to run, whereby the speed at which the thread is fed and twisted is increased until it reaches normal speed is. Since the input circuit for the main motor 33 is the Magnet winding 41 contains, the speed of the main motor 33 does not rise steeply, so that there is buffering of the startup process results. After reaching normal speed, the contacts 4 are 4 with the help of a timer (not shown) closed and the magnet winding 41 is short-circuited ·. This enables normal operation the. Draw-texturing device and there are no thread breaks. As the exemplary embodiments show, the generator generates 46, if the power source is upstream of the contacts 43, an output signal even after opening the contacts, while the engines are already standing. This has the consequence that the speed of the auxiliary motor 47 in the course of a kind Regenerative braking is reduced, in cooperation with the drawn thread, whereby thread breaks are prevented and which makes it possible to start the whole machine at the same time, without further threading after the replacement an empty bobbin against a wound bobbin.

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According to the invention, there is no or only a small amount Possibility of thread breakage at the time of the start of the false twisting process or at the time at which the Thread is brought into the area of the heating device or at the point in time at which the speed is increased or decreased will. The efficiency of the threading process is thus considerably improved, which leads to an overall improvement the drawing-texturing machine results. In addition, the amount of yarn that is not needed, which is used during the threading process arises, can be reduced considerably due to the low speed during the threading process.

In the exemplary embodiment under consideration, a magnet winding is used as a starting circuit which causes buffering. • Of course, other known circuits can also be used instead.

From the above description it is clear that the drawing-texturing machine according to the invention, in particular with regard to the supply of new thread packages, with regard to the threading devices and with regard to the threading process without difficulty and with high economic efficiency can be used. At this point it should be pointed out that, as with other texturing machines, with the inventive Draw texturing machine upstream of the thread path between thread guides 12a and 12b below the Second threading base F2, a thread break detector 58 is provided. Another option is to use a special Provide thread guide close to and below the false twisting device 5 in order to be sure of an opposite one

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To achieve twisting of the threads comprising several fibers, and for this purpose to provide a second heating device of a special type and thereby an increased efficiency of the To achieve drawing texturing device. In further training of the In accordance with the invention, a cover of a special shape is also provided in order to achieve a soundproofing, since the high speed rotating false twisting devices, especially rotating tubes, generate considerable noise. By a such coverage, the texturing machine is further improved.

With reference to Figures 8A and _f ■ 8b will now be described a preferred yarn breakage detector for a drawing and texturing machine according to the invention in more detail. The illustrated thread breakage detector works very advantageously and without damaging the thread, since it only exerts a very small amount of tension, and comprises a feeler lever 62 on a base plate 61. A cylindrical weight 67 is attached to the rear end of the feeler lever 62 in such a way that the center of gravity of the feeler lever 62 and weight 67 is at a point G in front of the axis of rotation 63 of the feeler lever 62.

This arrangement creates a torque which acts in the direction of arrow A in FIG. 12A. If, however, a Yarn Y is in contact with the underside of the tip of the feeler lever 62 which is immediately upstream of the winders is arranged, there is an upward force between about 1 and 2 grams on the feeler lever 62, namely due to the thread tension, so that the feeler lever 62 is kept in equilibrium. On the base plate 61 is by means of a

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Screw a microswitch 68 attached to a switch arm 68a, v / elcher by rotating the feeler lever by a predetermined amount Angle can be operated. Such microswitches are commercially available. The microswitch 68 is related of the feeler lever 62 so arranged that in the normal state the weight 67 at the rear end of the feeler lever 62 is at a distance from the tip of the switching arm 6 8a of the microswitch 68 has. The distance is preferably as great as possible. The weight 67 only then comes into contact with the tip of the Switching arm 68a when the sensing lever 62 is deflected in the direction of arrow A from the equilibrium state.

A stop 74 made of a leaf spring is attached to a cover 7o made of a transparent acrylic glass plate by means of screws and nuts assembled. The stop 74 is suitable to secure the weight 67 when the feeler lever 62 is counterclockwise is pivoted, which is the case during threading or when resetting after a thread break.

Under normal conditions, the feeler lever 62 is kept in contact with the running yarn Y with a slight pressure, namely with the help of the weight 67 /, which prevents the likelihood of the appearance of dust flakes. In the event of a thread break the sensing lever 62 rotates as a result of the torque in the direction of arrow A and when the pivoting movement is sufficient the weight 67 hits the tip of the switching arm 6 8a of the microswitch 68 and overcomes the spring force of the switching arm 68a and swings it, whereby the microswitch 68 is actuated. The microswitch 68 in turn actuates the cutting device 59 upstream of the feed

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roll 3 in such a way that the thread feed is interrupted in order to ver prevent the thread from wrapping around the feed rollers. The cutting device can be designed so that it can with Can be operated using a magnetic switch.

In the yarn break detector under consideration, the feeler lever 62 is normally without mechanical contact with the microswitch 68, so that no errors, such as actuation of the microswitch, occur even if the feeler lever 62 due to changes in the tension of the traveling yarn Y to some extent is deflected in the vertical direction.

6 shows the structure of the second heating device of the drawing-texturing machine according to the invention. As is clear from the drawing, the second heater has slots and heats the threads evenly without touching them. A pipe 75 serves to pass the heating medium through, the product sold under the trademark "Dourtherm", for example, can be used as the heating medium. The pipe 75 extends along the thread path and to the front of the Tube 75 is provided with a U-shaped groove or slot 76. The thread runs in the slot 76. The slot 76 should have one Form part of tube 75, and the dimensions should be between about 3 and 15 ram in width and about 5 and 30 mm in width In front of the pipe 75 there is a slot 78 which is connected to the slot 76, which leads to the outside. The slot 78 runs in the direction of the thread path. He will limited by insulation pieces 79 and 8o made of asbestos or such as can exist. Above the insulation pieces

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79 and 8o a coating 81 is provided. The width of the slot 78 should preferably be approximately 3 mm in order to achieve advantageous thermal insulation and to create favorable working conditions. The outwardly opening end of the slot 78 should preferably be conically widened. With this construction, the thread can be easily inserted into the slot 78 without special tools. In other words, the thread can be easily inserted into the slot 78 of the second heating device. The upper and lower parts of the pipe 75 are connected to the supply pipe (not shown) for the heating medium via a pipe (not shown), the supply pipe running in the longitudinal direction of the heating device.The circulation of the heating medium through said pipes to heat the closed slot 76 ensure a uniform temperature within the slot (or within the two slots) for the two units, so that the thread Y ¹ provided with an E'alschdrall can be heated without the risk of uneven heating of the individual fibers, so that a uniform elastic elongation and consequently a high quality product.

As is well known, a thread can after going through a false twisting device has gone through when it is heated in a second heating device of the drawing-texturing machine, .for in the event that the fibers that make up the thread are not twisted well, a compression point is obtained which the Quality deteriorated considerably. Accordingly, the draw texturing machine according to the invention is as above has been described, an annular yarn guide 82 is provided,

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which is especially suitable for reverse twisting. The yarn guide 82 is about 1 to Io now, preferably 2 to 5 now below the transverse ^{web 5a 1 of} the false twisting device 5 and thus lies between the false twisting device and the first take-off roller 6, but to the side of the longitudinal axis of the rotary tube which forms the false twisting device. The thread guide 82 is provided with a guide bore which has at least one sharp edge 82b on which the thread rests. When the yarn Y ¹ passes through the yarn guide on its way, it has been found that the individual fibers are satisfactorily separated from one another.

Fig. .. shows a soundproofing cover for the false twisting devices 5 of the drawing-texturing machine according to FIG the invention. As is clear from the drawing, the cover 86 covers the false twisting device 5, the auxiliary devices for the reverse twist, which comprise the annular yarn guide 82 and a guide rod 8 3 as well as the Drive devices 85 for the false twisting device 5. The soundproof cover 86 comprises horizontal covers 86a of two sheets, an upper and a lower, which run parallel to each other along the center line of the machine and a front cover 86b pivotable about a pin 86c attached to the horizontal cover 86a. The front cover 86b covers the front of the twist tubes of the false twister. The air inside the soundproof Cover 86 and the oil mist accompanying the thread can pass through an outlet line 86d and an outlet line 88 Outlet openings 89 are discharged into the atmosphere.

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The soundproof cover 86 is fixedly mounted on a support 87 of the machine. Close to the junction of the Groove portions 9oa and 9ob are provided on the horizontal cover 86 and the front cover 86b. In addition, can go into the interior the soundproof cover cooled air can be introduced from a cooling air line 88 '. The, as' above described, constructed soundproof cover serves to encapsulate the noise source of the machine, whereby an excellent Soundproofing is achieved, v / as. As a result, working conditions are significantly improved.

509829/0749

Claims (7)

A 40 909 b September 23, 1974 Patent claims: 1.Jzieh texturing machine for synthetic fibers, with a for pulling and for generating a false twist serving processing part, which consists essentially of a feed roller for feeding an undrawn thread, from a first heating device, from a false twisting device for twisting the thread, from a first take-off roller, which rotates at a higher peripheral speed than the Feed roller and the pulling and feeding of the thread is used, from a second heating device and from a second There is a take-off roller that feeds the thread to a winding device and is equipped with a drive system, characterized in that a threading device is provided, which two together connected thread guide elements (pivot elements 15, 28) comprises, which at the upper and lower end of the first heating device (4) are provided, and which can be moved together via their connection (rod 21). 2. Drawing-texturing machine according to claim 1, characterized in that that the threading device upper yarn guide devices for feeding the thread (Y) to the first Heating device (4) and lower yarn guiding devices for feeding the thread (Y) to the false twisting devices (5) comprises that the upper yarn guide devices comprise a first pivot element (15) which is on a Block (14), which is fixedly mounted on the machining part, 50 9 829 / 07A9 A 40 909 b September 23, 1974 is pivotally mounted, as well as a control element (lever 19), via which the first pivot element (15) successively in a rest position, a preparatory position and a normal position The operating position is that the lower yarn guiding devices have a second pivot element (28) include, which is pivotally supported on a block which is fixedly mounted on the machining part, and a second Control element (lever 27), through which the second pivot element (28) in a rest position and a normal The operating position can be brought into being that the first and the second control element (19, 27) have a substantially vertical rod (21) can be detected and actuated, which the first and second control element (19, 27) at the same time actuated so that the rod (21) can be brought from its rest position one after the other into a first, second and third position is, and that the control elements (19, 27) are designed so that when adjusting the rod (21) in their first position only the first pivot element (15) is pivoted into its guide position that when adjusting the Rod (21) in its second position only moves the first pivot element (15) into its normal operating position is, and that when adjusting the rod (21) in their third operating position, the second pivot element (28) is pivoted into its operating position, while the first The pivot element (15) remains in its operating position. 3. Drawing-texturing machine according to claim 1 and 2, characterized in that that its drive system comprises a main electric motor (33), which the thread drive system drives as well as a secondary motor (47) which drives the false twisting devices and which via a generator (46) is connected to the main motor (33). 09829/0749 A 40 909 b September 23, 1974 4. drawing-texturing machine according to claim 3, characterized in that that an electrical auxiliary motor (34) is provided, which is connected in parallel to the main motor (33) and which is used to drive the machine during the threading process. 5. drawing-texturing machine according to claim 1, characterized in that that the first heating device (4) touches the thread to be heated and that the second heating device (7) works without contact. 6. drawing-texturing machine according to claim 5, characterized in that that the second heating device (7) has a tube (75) for passing a heating medium through which extends along the thread path and that the tube encloses a U-shaped slot (76) for heating the thread is, and that on the side of the tube (75) to which the U-shaped slot (76) opens, a thermal insulation (79, 80) is provided, in which a slot (78) is provided, which is an extension of the U-shaped Slot (76) runs. 7. drawing-texturing machine according to claim 1, characterized in that that a soundproof cover (86) is provided which surrounds the false twisting devices (5), and that lines (86d, 88, 88 ″, 89) for supplying and removing air are connected to the soundproof cover (86). 09 829 / 07Λ9