CN210458471U - Twisting machine - Google Patents

Abstract

The utility model relates to a twisting frame for making three-ply yarn has a plurality of twisting position (1), and every twisting position includes: first and second spindles (2,3) which can be driven independently of one another; first and second asynchronous motors (6,18), each one driving a spindle; first and second frequency converters (7,19), one each driving an asynchronous motor; a first and a second spindle controller (11,21), wherein one spindle controller is connected to the frequency converter via a bus communication device (10,20) and the two spindle controllers are connected to each other via a synchronization line (26); a first and a second thread guide device (14, 23), wherein the first thread guide device (14) is downstream of the first spindle (2) and the second thread guide device (23) is downstream of the second spindle, the first and the second thread guide device being designed with different diameters.

Description

Twisting machine

Technical Field

The present invention relates to a twisting or straight twisting machine (kabbleermaschine) for producing three-ply twists.

Background

Twisted or straight or double twisted yarns are mechanical refining methods of yarns used to produce certain service characteristics in twisted yarns. In the twisting method, two or more yarns are combined into one twisted yarn by rotation, whereas straight twisting is a special twisting method in which two or more yarns are twisted with each other without the individual yarns themselves obtaining twist. The advantage of twisted yarn is its higher tensile strength.

SUMMERY OF THE UTILITY MODEL

The term "thread" shall in the scope of the present application encompass all thread-like products such as yarns, film strips, tubular or strip-like fabrics and the like. For simplicity, the term "wire" is used synonymously with many possible alternative terms within the scope of the invention.

In order to produce three-ply twisted yarns, also called triple-ply cords, according to the straight-twisting method, a straight-twisting machine is used, which usually has a plurality of twisting positions. These twist positions are side by side in the machine longitudinal direction. The twisting positions each comprise two spindles on which the feed bobbins are inserted and an insertion device arranged on the machine frame for receiving a further feed bobbin. The thread is drawn off from the feed bobbins, twisted in a two-stage process and wound in a winding unit to form twisted thread bobbins.

When the straight twisting spindle is operated, the first feeding bobbin is arranged on the first spindle rotating in the barrel tank. But the cans and the feed spools themselves are prevented from rotating. From the first feed bobbin, a so-called inner wire is drawn axially upwards and fed to a twisting or joining point with the bobbin thread.

A second feeding bobbin from which bobbin creel wire is drawn out is placed in the creel. After the bobbin thread passes the outer brake and possibly the deflection mechanism, it enters the hollow spindle axially from below and leaves the first spindle. In the case of forming the first balloon, the bobbin creel is revolved around the can and fed to the balloon thread guide. In this position, the creel wire winds an inner wire, and is therefore also referred to as a straight twist point or a double twist point.

Above the straight twisting point, a first thread guide device is provided, to which the double twisted threads, also called cords, are guided. From the first thread guide, the two-ply twisted thread is guided by means of a thread deflection mechanism to the second spindle, enters the hollow spindle from below in the axial direction and leaves the second spindle. In the case of the second yarn balloon, the twisted yarn is rotated around the drum and untwisted so that the two individual yarns of the first and second feed bobbins are parallel side by side before the point of the second twist. From a third feed bobbin, which is inserted on the second spindle, a further third thread is drawn axially upwards and sent to the re-twisting point. At the double twist point, the three threads are rotated symmetrically and the three twisted threads are fed via a second thread guide to a winding device having a drive roller, a thread traversing device and a twisted thread or winding bobbin which is frictionally driven by the drive roller.

The proposed twisting or straight twisting machine for producing three-ply twists with a plurality of twisting positions is characterized in that each twisting position has: first and second spindles which can be driven independently of one another; first and second asynchronous motors, one of which drives each spindle; first and second frequency converters, one of which drives an asynchronous motor; a first and a second spindle controller, wherein one spindle controller is connected to a frequency converter via a bus communication device and the two spindle controllers are connected to each other via a synchronization line; first and second thread guiding devices, wherein the first thread guiding device is downstream of the first spindle, the second thread guiding device is downstream of the second spindle, and the first and second thread guiding devices are designed to have different diameters.

With a twisting or straight twisting machine designed in this way, symmetrical three-ply cords can be produced directly in one process step in a two-stage process. The spindles and the coils formed thereby are each driven by an asynchronous motor, which is in turn each driven by a frequency converter. The two spindles are now electrically associated with each other. The association of some spindle controllers is achieved by a central control device and additional synchronization wires. This allows a coordinated reaction to take place. Each spindle controller is connected to a frequency converter by means of a bus or by bus communication means. The frequency converters drive asynchronous motors of the respective spindles. The respective spindle controller then specifies the rotational speed setpoint value for the respective asynchronous machine and adjusts to the same rotational speed. The three-strand twisted structure is now produced by the two spindles from three feed materials.

After the cord has been produced in the form of a double twist in the first process stage, the double twist is untwisted in the second process stage by means of a second spindle with the formation of a second balloon of the thread, i.e. untwisted such that the individual threads are parallel or approximately parallel to one another before the point of the double twist. A further third thread from a third feed bobbin is then fed in before the second twist point, all three threads being rotated symmetrically. Thus, three strands of cord can be produced in a single process step consisting of two process stages.

Precise control of spindle speed is important based on untwisting of double-twisted yarns. In order to ensure coordination and control of the first and second spindles, the first and second spindle controllers are interconnected by a synchronization wire. By means of suitable software algorithms, it is ensured that twisted-line structures can be produced in a stable and error-free manner in the process.

In an advantageous embodiment, the first guide wire means diameter is larger than the second guide wire means diameter.

By designing the diameters of the two thread guiding devices in this way, the thread tension of the cord can be optimized reliably.

Further features and advantages of the invention emerge from the following description of a preferred embodiment of the invention, which shows important details of the invention, and from the claims. Some features may be implemented in the preferred embodiments of the present invention either individually or in any combination of a plurality.

Drawings

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic view of a twisted yarn position having the structure of the present invention.

List of reference numerals

1 position of twist

2 first spindle

3 second spindle

4 bobbin thread

5 interior wiring

6 first asynchronous motor

7 first frequency converter

8 first coil

9 first balloon yarn guide

10 first bus communication device

11 first spindle controller

12 rotation sensor

13 supply or braking device

14 first guide wire device

15 outer line

16 second line balloon

17 second balloon thread guide

18 second asynchronous machine

19 second frequency converter

20 second bus communication device

21 second spindle controller

22 third line

23 second guide wire device

24 winding and traversing device

25 twisted or wound bobbins

26 synchronous conductor

Detailed Description

Fig. 1 shows a schematically illustrated twisting position 1 of a twisting or straight twisting machine. For a symmetrical three-ply twist or a three-ply cord direct twist, two spindles, namely a first spindle 2 and a second spindle 3, are required.

The ingot group completes two stages of processes in sequence. That is, the first spindle 2 forms a bifilar cord by processing the creel 4 and the inner wire 5. At this point, the first spindle 2 is driven by a first asynchronous motor 6, which in turn is driven by a first frequency converter 7. In the case of forming the first bobbin thread 8, the bobbin thread 4 is rotated around the can of the first spindle 2 and fed to the first bobbin thread guide 9.

The first frequency converter 7 is connected to a first spindle controller 11 via a first bus communication means 10. The rotational speed of the first asynchronous machine 6 is monitored by means of a rotational speed sensor 12.

The first coil 8 is also minimized and controlled in terms of its diameter by a supply or brake device 13. The resulting thread tension of the first thread balloon 8 is eliminated by means of the first thread guiding device 14 and the two-ply twisted thread is guided to the adjacent second spindle 3 by means of the thread turning mechanism.

In the second spindle 3, the two-strand twisted yarn is guided as an outer yarn 15 to a second balloon guide 17 while forming a second yarn balloon 16 around the drum of the second spindle 2.

On the second spindle 3, the diameter of the second coil balloon 16 is also minimized and controlled by means of the supply or braking device 13. The second coil 16 is driven by a second asynchronous motor 18, which in turn is driven by a second frequency converter 19. The spindle speed generated by the second spindle 3 untwists the bifilar cords so that the two individual threads consisting of the creel thread and the inner threads 4, 5 are arranged side by side in parallel.

Here, the second frequency converter 19 is connected via a second bus communication means 20 to a second spindle controller 21. The rotational speed of the second asynchronous machine 18 is also monitored by means of the rotational speed sensor 12.

Before the point of double twisting, another third thread 22 comes in parallel and the three-stranded structure is symmetrically rotated.

The thread tension of the three-ply cord is eliminated by means of the second thread guide 23, and the three-ply cord is wound onto a twisting or winding bobbin 25 by means of a winding and traversing device 24. The twisted or wound package 25 with the triple cord can thus be produced in one process step.

In order to ensure the coordination and control of the first and second spindles 2,3, the first and second spindle controllers 11,21 are connected via a synchronization line 26 in addition to a central control device, not shown. The twisted structure is ensured by a suitable software algorithm to be produced in a manner that the process is stable and free of false twists.

Claims (3)

1. Twisting machine for producing three-stranded wires, having a plurality of twisting positions (1), each twisting position having:

-a first spindle (2) and a second spindle (3) which can be driven independently of each other,

-a first and a second asynchronous motor (6,18), wherein each asynchronous motor (6,18) drives a spindle (2,3),

-a first and a second frequency converter (7,19), wherein each one of the frequency converters (7,19) drives an asynchronous motor (6,18),

-a first and a second ingot controller (11,21), wherein each of the ingot controllers (11,21) is connected to a frequency converter (7,19) via a bus communication means (10,20), and the two ingot controllers (11,21) are connected to each other via a synchronization wire (26),

-a first thread guiding device (14) and a second thread guiding device (23), wherein the first thread guiding device (14) is downstream of the first spindle (2), the second thread guiding device (23) is downstream of the second spindle (3), and the first thread guiding device (14) and the second thread guiding device (23) are designed with different diameters.

2. Twisting machine according to claim 1, wherein the diameter of the first guide wire means (14) is greater than the diameter of the second guide wire means (23).

3. Twisting machine according to claim 1, wherein said twisting machine is a straight twisting machine.

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