EP3027794B1 - Spinning machine with false-twist device - Google Patents

Description

The present invention relates to a spinning machine, in particular a ring spinning machine, with a plurality of juxtaposed units, each unit comprising a drafting device for warping a sliver and a spinning device for twisting the warped sliver to a yarn and a arranged between the drafting and the spinning device false twisting device in Substantially extending transversely to the thread and these contacting friction surfaces and a corresponding false twist device which is attached to a spinning machine to obtain a generic spinning machine.

From the WO 2010/015185 A1 a spinning machine is known in which between a drafting device, on which the sliver is warped and a coil on which the sliver is wound, a false twist device is arranged. The false twist device is according to an embodiment of the local disclosure of a single belt, which is driven by a drive device. Upper and lower run of a belt are driven in opposite directions. The yarn contacted the two Riementrums either punctiform ( FIG. 4 ), when the belts are arranged directly next to each other. In another embodiment ( FIG. 3 ), the straps are spaced apart and extend substantially vertically one above the other in the opposite direction. The thread wraps in this embodiment, the belt with an angle of about 90 °. In the embodiments according to the Figures 1-7 the false twist device is formed from a single belt. The two Riementrums have the same amount of speed, but they are running in the opposite direction. While in these embodiments, the interference of the false twist device by different shapes, speeds or arrangements of the two belt spins of the single belt is very limited, is in the further embodiment according to Figure 8 or in the embodiment of Figure 9, a false twisting device provided with two belts. In this case, however, the belts are arranged in a circle, wherein the thread is located between the two belts. Although this arrangement is variable, but it is limited to a single spinning station and thus implement very complicated to a spinning machine structurally.

The object of the present invention is to provide a spinning machine and a false twist device with which a plurality of spinning units of a spinning machine can be operated. The false twisting device for the spinning machine should be easy to retrofit to an existing spinning machine without such a false twist device and be very flexible in their application.

The object is achieved with a spinning machine according to claim 1. A spinning machine according to the invention has a plurality of juxtaposed spinning units. A suitable spinning machine is, for example, a ring spinning machine. Each spinning unit includes a drafting device for warping a sliver and a spinning device for twisting the warped sliver into a yarn. Between the drafting and the spinning device a false twist device is arranged. The false twist device has friction surfaces, which run essentially transversely to the thread and contact it. The velocity vectors of the friction surfaces are substantially opposite to each other and extend approximately transversely to the longitudinal axis and direction of the thread. According to the invention, the friction surfaces of the false twist device consist of two separate plastic belts. When the thread is correctly inserted, the plastic straps are wrapped in particular in a Z-shape by the thread, so that the two oppositely directed movement components of the beltrems touch the thread. The fact that the two friction surfaces act on both sides of the thread as a result of the Z-shaped looping around the thread causes a twisting of the thread or its outer fibers.

The false twist device moreover has a drive device which drives the two separate plastic belts in the opposite direction.

At least one of the two belts or belt rums of the false twist device is guided along several of the spinning units of the spinning machine. Several spinning units form part of the entire spinning machine. In this way, a very simple false twist device is created, which can either be produced and delivered immediately together with the spinning machine or can also be subsequently grown on spinning machine. The belt, which is guided along several of the units of the spinning machine, requires only one drive for several spinning units. The second belt can either also be guided along several units of the spinning machine or it can also be provided per spinning unit. The two belts can also be assigned to a different number of spinning units. Through this different length versions of the belt, the cost of the construction of the false twisting device can indeed be higher, but it is also possible with respect to a greater variability. The setting on different spinning units.

In an advantageous embodiment of the invention, at least one of the belts, preferably even both belts along an entire section of the spinning machine with multiple spinning stations, or along the entire spinning machine is arranged. In a sectional construction thus from one section to section different setting of the belt is possible. A Section forms in this case one of the said sections of the length of the spinning machine.

In order to keep the effort for the arrangement of the false twist device as low as possible, it is advantageous if both belts run along the entire spinning machine and only need a drive device.

In order to keep the effort for the arrangement of the spinning device even lower, it is particularly advantageous if the at least one belt, preferably both belts, are guided around the entire spinning machine. The spinning machines, which are constructed on two sides in most cases, d. H. Spinning units are arranged on each side of the slitting machine can thus be equipped with only two belts with a false twisting device for all spinning stations. Alternatively, the at least one belt, preferably both belts, can also be guided around a section such that the opposing spinning units of one section are each provided with a false twist device with at least two belts. Depending on the design, it is also possible that one or both belts are guided around several sections of the spinning machine.

It is particularly advantageous if the two belts are arranged substantially in a horizontal plane. The fact that the thread is supplied from the top of the drafting and continues down to the coil, a safe looping of the belt can be achieved hereby. The false-twist effect, which can thereby be introduced into the thread, is thus largely constant.

Advantageously, the plane in which the two belts are arranged at an angle between 30 ° and 60 °, preferably at an angle of 45 ° to the stretching field plane is arranged. The stretching field plane is the plane passing through the contact lines of the drafting rollers. at an inclination of the stretching field plane at 45 ° to the horizontal, the plane passing through the belts is horizontal, ie also horizontal, if the corresponding angle between the belt plane and the stretching field plane is 45 °.

It is advantageous that the thread is guided in such a way and the false twisting device is arranged such that it wraps around at least one of the two belts by more than 90 °, preferably by more than 110 °. This is for example given when the thread is fed obliquely from above the first belt, the second belt lies substantially in the same horizontal plane as the first belt and the yarn is then further withdrawn obliquely downwards from the false twist device. Due to the high wrap around the false twist effect is particularly well introduced into the thread.

If the two belts between the drafting arrangement and the spinning device are arranged such that the first contacted belt is wrapped by the thread more than the subsequently contacted belt, the result is a particularly advantageous and stable spinning process with the generation of a very good thread.

In particularly advantageous embodiments, the belt first contacted by the thread is looped by the thread at an angle between 100 ° and 200 °, preferably between 140 ° and 180 °, and / or the belt subsequently contacted by the thread is at an angle to the thread between 90 ° and 180 °, preferably between 110 ° and 140 °.

For a simple embodiment of the false twist device, it is provided that the drive device for driving the two belts is a single motor with a gear. Through the gearbox, a reversal of direction of the drive of the belt can be done. Thus, the first belt in a first direction and the second belt are driven in a second, opposite direction.

In order to be able to drive the two belts particularly individually, it is advantageous if the drive device has at least two motors, so that each of the belts is driven by a separate motor. The speed of the two belts is thus individually controllable and the false twist device is optimally adjusted to the desired rotation introduction into the yarn.

Advantageously, it is possible for the drive device to drive the belts at different speeds both when using a single engine with a transmission and when using two separate motors.

The belts are advantageously designed such that they have a round or a rounded cross-section. Thus, the thread can optimally invest in the belt and the rotation initiation by the belt in the thread can thus be done very well.

If the belts have different contact surfaces which rest against the yarn, different threads or a different swirl behavior of the false twist device can be addressed individually. The contact surfaces can in particular have different shapes, surfaces, coefficients of friction or abrasion behavior. Also different materials of the two belts come into question. Among all these properties, the false twist device can be tuned individually to the respective thread which is to be twisted.

In order to apply a constant tension on the individual threads of the spinning machine, it is advantageous if the belt in predetermined Intersperses interact with guiding and / or clamping devices.

It is particularly advantageous if adjusting devices are provided for adjusting the positions of the belts relative to each other, in particular with regard to their vertical and / or horizontal position and to the position to the thread running in and out of the false twisting device.

The invention also relates to a false twisting device with belt and a drive device having the aforementioned features, which is adapted to be mounted on a spinning machine to provide a spinning machine according to one or more of the preceding claims.

Figur 1

eine schematische Darstellung einer erfinderischen Falschdralleinrichtung an einer Spinneinheit,

Figur 2

eine schematische Darstellung einer Draufsicht einer Spinnmaschine mit der erfindungsgemäßen Falschdralleinrichtung mit zwei separaten Motoren,

Figur 3

eine schematische Darstellung einer Draufsicht einer Spinnmaschine mit der erfindungsgemäßen Falschdralleinrichtung mit einem Motor mit Getriebe,

Figur 4

eine schematische Darstellung einer Draufsicht einer Spinnmaschine mit der erfindungsgemäßen Falschdralleinrichtung mit teilweise separaten Antrieben pro Maschinenseite,

Figur 5

eine schematische Darstellung einer Draufsicht einer Spinnmaschine mit der erfindungsgemäßen Falschdralleinrichtung mit teilweise separaten Antrieben pro Sektion und

Figur 6

eine schematische Darstellung von Umschlingungen der Riemen.

Further advantages of the present invention are described in the following exemplary embodiments. It shows:

FIG. 1

a schematic representation of an inventive false twist device on a spinning unit,

FIG. 2

a schematic representation of a plan view of a spinning machine with the false twist device according to the invention with two separate motors,

FIG. 3

a schematic representation of a plan view of a spinning machine with the false twist device according to the invention with a motor with gear,

FIG. 4

a schematic representation of a plan view of a spinning machine with the false twist device according to the invention with partially separate drives per machine side,

FIG. 5

a schematic representation of a plan view of a spinning machine with the false twist device according to the invention with partially separate drives per section and

FIG. 6

a schematic representation of wraps of the belt.

In FIG. 1 the schematic representation of a spinning unit 1 of a spinning machine 10 is partially shown. An output roller pair 2 of a drafting system, not shown, provides a thread 3. The thread 3 is deflected by a first plastic belt 4 and then to a second plastic belt 5. Subsequently, the thread 3 passes through a twist stop 6 and a ring traveler 7 and is subsequently wound onto a spool 8. De first plastic belt 4 and the second plastic belt 5 form a false twist device. 9

The first plastic belt 4 and the second plastic belt 5 have an opposite direction of movement. The fact that the yarn rests on two in the opposite direction moving belt, it is pulled from the run of a belt in one and the run of the other belt in the other direction. The yarn is deflected to the running direction until the two friction forces are in balance. The thread tensions F ₁₁ and F ₁₂ and F ₂₁ and F ₂₂ are different. Thus, the contact pressure of the thread on the one Riementrum is different to the other Riementrum. The thread is so much more taken from the Riementrum on which he rests stronger, assuming it is similar belt 4 and 5. When ring spinning the contact pressure on the thread ballon between the twist stop 6 and ring traveler 7 closer strand is highest. The belt of this strand moves so that the true rotation is amplified by the false twist generated by the belt. Between belt 4 and drafting roller exit roller pair 2 are usually introduced more rotations, as then later in the finished yarn on the cop or the coil 8 are available.

By arranged in a substantially horizontal plane belt 4 and 5 in conjunction with the arrangement of the output roller pair 2 and the twist stop 6, a looping of the belt 4 and 5 is generated by the yarn 3, which is more than 90 °. As a result, a particularly high frictional force is applied to the yarn 3 and thus swirl introduction into the yarn 3. The false twist device can thereby work very effectively. Nevertheless, the thread 3 is spared so far that a thread break is to be avoided in an acceptable manner.

In FIG. 2 the plan view of a spinning machine 10 is shown, in which a plurality of spinning units 1 is arranged. For reasons of clarity, not all spinning units are provided with the reference numeral 1. The belts 4 and 5 are shown interrupted to indicate that the spinning machine 10 can be significantly longer. The two plastic belts 4 and 5 surround the spinning machine 10 such that all spinning units 1 are enclosed by the two belts 4 and 5. Each of the belts 4 and 5 is driven by a separate motor 11 and 12 and each with a drive roller 15. At the deflection of the belt 4 and 5 pulleys 13 are arranged. The pulleys 13 or other, not shown here devices can be provided for clamping and / or positioning of the belt 4 and 5.

The fact that the motors 11 and 12 independently drive the belts 4 and 5, the setting of the speeds is individually selectable. This allows optimal rotation initiation into the yarn. Various support pressures of the thread 3 on the belt 4 and belt 5 can thereby be compensated or realized. In addition, different belts 4 and 5 can be used. They can differ in their cross-section, their coefficient of friction or abrasion behavior. Also, they can be clamped differently, so as to vary the effect on the thread 3. The belt speeds v ₁ and v ₂ , which are opposite to each other, can also be varied.

In FIG. 3 is a variant of the representation of FIG. 2 shown. In this case, the two belts 4 and 5 are indeed driven by a single motor 14. Between the engine 14 and the belt or the drive pulley 15 for the belt 4 and 5, a transmission 16 is arranged in each case. With the gear 16, a variation of the speed on the belt 4 or 5 may be provided in comparison to its other belt. It is also possible to use only one transmission 16, which is able to realize a reversal of direction for the opposite speeds v ₁ and v _{2 of} the two belts 4 and 5.

Another variant of the present invention is in FIG. 4 shown. Although still surrounds the belt 4, which is driven by a motor 11, the entire spinning machine 10. The belt 5, however, runs only on one side of the machine. There are therefore two belts 5 and 5 'provided on the spinning machine 10, which are each driven by a motor 12 and 12'. The returning strand of the belt 5 is shown in dashed lines, since it is not wrapped by the thread 3. This makes it possible to provide the two machine sides of the spinning machine 10 with a total of other false twist device 9 or individually to control and drive. Also, the belt 5 or 5 'can be tensioned and / or positioned with a device, not shown.

In FIG. 5 is another division of the presentation FIG. 4 performed. The spinning machine 10 has various sections 17, which each structurally summarize several spinning stations 1 of the spinning machine 10. While the outer belt 4 surrounds the entire spinning machine 10, the sections 17 are each on their machine sides with individual Belt 5 equipped. The false twist device 9 can thus be set individually per section 17 and machine side.

In FIG. 6 the arrangement of the belts 4 and 5 with respect to a drafting plane S is shown. The two belts 4, 5 are arranged in a belt plane R between drafting 2 and spinning device 10. The belt plane R assumes with the drafting plane S an angle γ, which is here about 45 °. The drafting plane S is inclined relative to the horizontal H by the angle δ, which is here also 45 °, since the horizontal H and the belt plane R are parallel to each other.

The wrap angle of the first belt 4 is denoted by α, the wrap angle of the second belt 5 to β. According to an advantageous embodiment of the invention, the first contacted belt 4 is wrapped by the thread 3 more than the subsequently contacted belt 5. Angle α is thus greater than the angle β. This results in a particularly advantageous and stable spinning process with the generation of a very good and stable thread 3.

In particularly advantageous embodiments of the first of the yarn 3 contacted belt 4 of the yarn 3 at an angle α between 100 ° and 200 °, preferably between 140 ° and 180 ° wrapped. In this embodiment, the angle α is about 150 °. The belt 3, which has been contacted by the yarn 3, is looped by the yarn 3 at an angle β between 90 ° and 180 °, preferably between 110 ° and 140 °, in this case about 120 °.

Of course, embodiments shown above are not exhaustive. Thus, for example, the belt 4 per machine side or sectioned be executed. The inner belt 5 may also revolve around the entire machine while the outer belt 4 is split. It is also possible that the representations of the Figures 2 . 3 and 4 not the complete spinning machine 10, but only a partial sections such as a section 17. The plurality of sections or sections 17, of which such a spinning machine 10 is made, then with respect. Their Falschdralleinrichtung 9 are operated independently. The pair of output rollers 2 of a drafting system can also be another component, with which the thread 3 of the false twisting device 9 is supplied. Combinations of the individual illustrated and described features of the invention from the various figures are possible at any time. The embodiments are not limited to their individual representations, but can be combined.

LIST OF REFERENCE NUMBERS

1

Spinning unit of a spinning machine

2

Output roller pair of a drafting system

3

thread

4

First plastic belt

5

Second plastic strap

6

twist stop

7

ring rotor

8th

Kitchen sink

10

spinning machine

11, 12

Separate motors for driving the belts 4 and 5

13

Pulleys of belts 4 and 5

14

Only motor for driving the belts 4 and 5

15

Drive pulley for the belts 4 and 5

16

Transmission for driving the belts 4 and 5

17

Sections of the spinning machine 10

F ₁₁ , F ₁₂ , F ₂₁ , F ₂₂

thread tensions

v ₁ , v ₂

belt speed

Claims (15)

1. A spinning machine, particularly a ring spinning machine comprising a plurality of units (1) disposed adjacent to each other, each unit (1) comprising a drafting system for drafting a sliver and
   a spinning device (10) for twisting the drafted sliver into a thread (3) and
   a false twist device (9) disposed between the drafting system and the spinning device (10) and composed of
   friction surfaces running substantially transverse to the thread (3) and contacting the same,
   the friction surfaces of the false twist device (9) being enlaced by the thread (3), particularly in a Z-shape,
   characterized in that
   the friction surfaces of the false twist device (9) consist of two separate plastic belts (4, 5),
   the two separate plastic belts (4, 5) are driven in opposite directions by means of a drive device (11, 12; 14), and
   at least one of the belts (4, 5) is guided along a plurality of the units (1) of the spinning machine (10).
2. The spinning machine according to the preceding claim, characterized in that at least one of the belts (4, 5), preferably both belts (4, 5), run along an entire section (17) of the spinning machine or along the entire spinning machine (10).
3. The spinning machine according to one or more of the preceding claims, characterized in that the at least one belt (4, 5), preferably both belts (4, 5), are guided about one or more sections (17) or about the entire spinning machine (10).
4. The spinning machine according to one or more of the preceding claims, characterized in that the two belts (4, 5) are disposed substantially in a horizontal plane.
5. The spinning machine according to one or more of the preceding claims, characterized in that the plane (R) in which the two belts (4, 5) are disposed is disposed at an angle (γ) between 30° and 60°, preferably 45°, from the plane (S) of the drafting zone.
6. The spinning machine according to one or more of the preceding claims, characterized in that the thread (3) is guided such that said thread enlaces at least one of the two belts (4, 5) by more than 90°, preferably by more than 110°.
7. The spinning machine according to one or more of the preceding claims, characterized in that the two belts (4, 5) are disposed between the drafting system and the spinning device (10) such that the first contacted belt (4) is more enlaced by the thread (3) than the belt (5) contacted thereafter.
8. The spinning machine according to one or more of the preceding claims, characterized in that the first contacted belt (4) is enlaced by the thread (3) by an angle (α) between 100° and 200°, preferably between 140° and 180°, and/or the belt (5) contacted afterwards is enlaced by the thread (3) by an angle (β) between 90° and 180°, preferably between 110° and 140°.
9. The spinning machine according to one or more of the preceding claims, characterized in that the drive device for driving the two belts (4, 5) is a single motor (14) having a gearbox (16).
10. The spinning machine according to one or more of the preceding claims, characterized in that the drive device for driving the two belts (4, 5) comprises at least two motors (11, 12), so that each belt (4, 5) is driven by a separate motor (11, 12).
11. The spinning machine according to one or more of the preceding claims, characterized in that the drive device drives the two belts (4, 5) at different speeds (v₁, v₂).
12. The spinning machine according to one or more of the preceding claims, characterized in that the belts (4, 5) comprise a round or a rounded cross section.
13. The spinning machine according to one or more of the preceding claims, characterized in that the belts (4, 5) comprise different contact surfaces for the thread (3), particularly different shapes, surfaces, friction coefficients, or wear behavior.
14. The spinning machine according to one or more of the preceding claims, characterized in that guiding and/or tensioning devices for the belt (4, 5) are disposed at predefined spacings.
15. The spinning machine according to one or more of the preceding claims, characterized in that adjusting devices are provided for adjusting the positions of the belts (4, 5) relative to each other, particularly with respect to the vertical and/or horizontal location thereof.

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