DE7330688U - DEVICE FOR SPINNING UP FOR OPEN-END SPINNING UNITS - Google Patents

Description

PATENT LAWYERS V DR.-ING. HH WILHELM -'DIRL ₁ -JNG. H. DAUSTER [L D-7000 STUTTGART 1 - G Y M N AS I U M S TR A S S E 31 B - TELEPHONE (0711) 291133

Stuttgart, August 22, 1975 There / where

Re: Patent and utility model auxiliary application D 4512

Note: Fritz Stahlecker

7341 Bad Überkingen Uniandstrasse 18

and

Hans Stablecker 7554 Süssen Haldenstrasse 20

ι) Method and device for piecing for

an open-end spinning unit

The invention relates to a method and a device for Piecing for an open-end spinning unit, in which after, a thread breakage or to start up the machine a thread end against the take-off direction in a spinning rotor, attached to its own fiber ring located there and is then pulled off and wound up again *,

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^ ¹ V «, J" * «f is in * rwy. «·" V— · tf -.- ". ¹ w the the piecing an open-end spinning unit Yarn- most cases in Area of the piecing position

quality and especially the tear resistance barunrergeseczt. There is a danger that the aisspiss point tears again immediately after piecing and is the cause of another thread breakage. But even if no new thread breakage occurs, in many cases it is necessary to rewind the piecing positions to remove, in which the piecing points are cut out and the thread ends are knotted together. This is an operation that usually has to be carried out on an additional machine and thus significantly increases the manufacturing costs.

The invention is based on the object of a piecing process of the type mentioned at the outset, in which the ge = spcssese thread also has a sufficient thread in the area of the pinched threads Has strength, so that downstream rewinding processes in particular can be dispensed with. The invention exists in that on the area of the piecing point of the thread after piecing, during drawing off and before winding a solidifying agent is applied. Such a solidifying agent allows the piecing point to be reinforced so that the thread in this area is at least sufficient Tear resistance is maintained so that it can be processed further without additional rewinding operations. For example a washable solidifying agent can be provided, which is only then washed out in a finished fabric, in which places with slightly lower tear resistance do not play a decisive role.

In an advantageous embodiment of the invention it is provided that the area of the The spinning point of the thread is deflected during the withdrawal and is guided past an application device. Here can

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In particular, a contact roller should be provided which allows a relatively economical consumption of solidifying agent.

In another embodiment of the invention wLcd

that the thread briefly solidifies a medium is sprayed.

In an advantageous Ausfühxungsform the invention it is provided that a contact roller with a deflection device or a spray device with an actuating device ι are housed in a piecing device which is arranged movable along a spinning machine and in-which the thread to be spun is to be inserted. This makes it possible for one piecing device to be used for several or all of the spinning units of a spinning machine, so that the expenditure for such a spin-off device remains relatively low compared to the rest of the process.

Further features and advantages of the invention emerge from the following description of two in the drawings illustrated embodiments and the subclaims.

ν Pig. Λ shows a device for performing the inven-

& proper procedure,

Fig. 2 shows a further device and FIG. 3 shows a detail of the device according to FIG. 2.

From an open-end spinning machine 1, only one unit 1 is shown in Fig. Marked with which is associated 2a is a piecing apparatus, which can be longitudinally moved to the open-end spinning machine ·· during normal operation leave a dot-dash line shown woven Fades 5 a Spinning turbine 3

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Via a yarn take-off channel 4 · It is taken off by yarn take-off rollers 11 and 11 and guided to a winding roller 6 on which the take-up reel 7 rests. In the case shown, this winding spool is the old one. Spulssksltss ¹ 3 us can be pivoted as axis 9 «lifted off the winding roller 6 by an auxiliary winding roller 6a of the piecing device 2a.

/ "\ During a piecing process, the thread to be spun temporarily brought into position 5a and by means of the auxiliary take-off rollers 10a and 11a, of which the roller 10a can be driven in both directions, in cooperation with the Auxiliary take-up roller 6a returned to the yarn take-off channel 4, over dsjj the thread end 3a to be spun through iron in the SpiuEiFtE-JbijQe 3 he? !!? scJiei! € l # ^ vacuum sucked will. In the Sp inii turbine 3 there is an indication of one A fiber ring made of dissolved fibers is attached and then pulled off again *. A thread tension sensor 16a causes to be pulled off via an electrical contact at a predetermined thread tension reverses the direction of rotation of the auxiliary roller pair 10a and 11a and the auxiliary winding roller

* '6a. The thread is then pulled without interrupting the pull

via non-illustrated tool back into the operating \ position 5 in the guide means of the off en enr ^ELJ d-spinning

aggregates 1 covered.

From the thread tension sensor 16a with the triggering of the Reversal of the direction of rotation addressed a control means 17a, which via a coupling member 18a a valve of the spray container 12a for a short time. During this period, a solidifying agent 13a, which is preferably liquid and can be washed out, is sprayed onto the piecings of the yarn 5a, where occurs through a noticeable solidification of the yarn 5a.

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The thread tension sensor 16a controls the rollers on the one hand 10a and 6a and, on the other hand, the control means 17a for the spray container such that the solidifying means 13a in the "Ssestlich" "limited to the Aaspimiststelle des Garaes 5a remains »Since a thread end of the same length ic the spinning turbine 3 is always returned for piecing, that can Actuation of the spray device also from a with z. B. triggered the auxiliary winding rollers 10a and 11a connected counter will. A splash plate 19a can be provided to catch excess solidifying agent.

In the embodiment of Fig. 2, the open-end spinning machine is not shown, but only a piecing device 2b. The draw-off rollers are here with 10b and 11b and the auxiliary take-up roller is indicated by 6b. Even with this one Device are the rollers 10b and 6b in both directions drivable and are during the spinning process controlled by a thread tension sensor 16b.

The thread end temporarily inserted into piecing device 2b takes position 5b shown in phantom a. A control means 17b, which is a thread guide lever, can be set into action by the thread tension sensor 16b 18b can briefly pivot about the axis 18c and temporarily brings the pinned thread into position 5c. During this period, a contact roller 15b located in this area and a possibly provided contact roller 15b can be used second roller 14b the solidifying agent 13b on the thread 5c can be applied. The thread guide lever 18b is in Fig. 3 is shown from a different point of view and shows how the thread 5c on the thread guide lever pivotable about the axis 18c 18b is applied. A tension spring 20b, not shown, brings the thread guide lever 18b back into its old position after the piecing process has ended. Point of time for the application of the solidifying agent is

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Sprech.er.der way as in the embodiment according to Fig. Λ determined by the thread tension sensor 16b and / or additional control means in such a way that only the area of the piecing point is solidified.

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Claims (4)

II «« t i · 11 · # * ti · «111 · · Protection claims 1. Device for piecing for open-end spinning units that Devices for returning a thread end against the withdrawal direction into a spinning rotor, for redrawing and winding contains, characterized in that an auxiliary device ("15b, 12a) for applying a solidifying agent is provided on the area in front of the piecing point of the re-spun thread (5a, 5b). 2. Apparatus according to claim 1, characterized in that in the area of the thread guide a covered with solidifying agent Contact roller (15b) is arranged, against which the thread (5c) can be deflected with a deflection device (18b). 3. Device according to claim 1, characterized in that in the area of the thread guide one directed towards the thread (5a) Spray device (12a) is arranged with an actuating device causing a brief switch-on (17a) is provided. 4. Apparatus according to claim 2, characterized in that the Actuating device (17a) of the spray device (12a) or the deflection device (18b) for the contact roller (15b) with a thread tension sensor (16a, 16b) is controlled. 5 · Device according to at least one of claims 1 to 4, characterized characterized in that the contact roller (15b) with the deflection device (18b) or the spray device (12a) with the Actuating device (17a) in a? Piecing devices (2a, 2b) are accommodated, which can be moved along a spinning machine is arranged and into which the thread end to be spun (5a, 5b) is to be inserted. 733068820.12.73