JPH06116822A - Machine for processing endless synthetic multifilament yarn - Google Patents

Abstract

PURPOSE: To prevent the adverse effect of the tension of synthetic multifilament threads in a winding zone on a thread texturing zone by installing a sensing apparatus for detecting the tension of the thread in the texturing zone or in the winding zone and adjusting the action of a thread brake mechanism. CONSTITUTION: A sensing apparatus 21 for detecting the tension of synthetic multifilament thread in a texturing zone 10 or a winding zone 13 and adjusting the action of a thread brake mechanism 12 so as to keep the balance of thread tension. The tension of the thread at least in the texturing zone can be maintained in approximately constant by the thread brake when the tension of the thread in either the texturing zone or the winding zone is changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endless synthetic multifilament yarn having a yarn feeding mechanism, a yarn entanglement unit, a yarn braking mechanism and a yarn winding unit which are arranged one behind the other in the yarn traveling direction. Regarding the machine.

[0002]

2. Description of the Prior Art In a device of this type known in the prior art (cf. DE 17 10 639 A1), the thread braking mechanism is embodied as a thread tensioning device. That is, this thread braking mechanism tensions the thread. In other words, the thread braking mechanism increases the tension of the thread running in the entanglement zone to the value required for normal entanglement. The tension in this confounding zone is then preferably adjusted to a small value.

That is, the reduction of the yarn tension in the entanglement zone is suitable for increasing the entanglement density and / or the processing speed (Magazine: Chemiegasern / Textilindustrie, 10.198).
See page 0,822).

A yarn braking mechanism of this type which is simple in construction increases the tension of the yarn coming from the treatment zone and reduces the tension of the fed yarn. However, the drawback of this thread braking mechanism is that it reduces the change in thread tension in proportion to the difference in thread tension between the thread supplied and the thread processed, but if there is no difference, the thread changes. It is sent further without being done. This has the serious drawback that the yarn tension in the entanglement zone as well as the yarn tensions in the confounding zone can also change in the treatment operation as described here, owing to very different effects in the winding zone. . Moreover, the effect of entanglement depends to a large extent on the degree of yarn tension occurring in this entanglement zone.
Therefore, variations in yarn tension within the entanglement zone cause different entanglements along the yarn, which affects the quality of the treated yarn and renders the yarn unusable.

In view of the above, it is proposed to prevent the yarn tension necessary for obtaining a sufficiently tightly wound winding in the winding zone from adversely affecting the yarn interlacing zone provided in front. Has been done. That is, an additional positive yarn feeder, such as a galette / feed roller or roll pair (see German Patent DE 32 48 396) or stepped Galed (DE 17 85 442). It is proposed that the publication and the German Utility Model Utility Model No. 1 181 004) be provided in the middle. However, these proposed arrangements are quite expensive in construction, and thus make the device expensive.

[0006]

SUMMARY OF THE INVENTION The problem underlying the invention is that a machine of the type described at the outset has a simple effect on the yarn entanglement zone, which is located before the yarn tension in the winding zone. It is to be configured so that it can be avoided by various methods.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a sensing device for detecting the tension of a yarn in a yarn entanglement zone or a yarn winding zone and adjusting the action of a yarn braking mechanism so as to obtain a tension balance. It is solved by being provided.

When the yarn tension in the winding zone or in the yarn entanglement zone changes due to the application of this structure, the yarn braking is automatically performed, and the yarn tension in the yarn entanglement zone remains at least substantially constant.

When the thread tension in the winding zone increases, for example, this increase is sensed and the thread braking action of the thread braking mechanism is increased, and therefore the reverse effect of the thread tension from the winding zone to the thread entanglement zone. It is reduced and the yarn tension in the yarn entanglement zone stays approximately constant. This further increases the yarn tension in the winding zone, but this does not have a detrimental effect on already entangled and fixed yarns.

The yarn tension in the yarn interlacing zone and in the winding zone is adjusted depending on the predetermined braking action of the yarn braking and the thread tension which can be adjusted to some extent of the yarn running between the yarn supplying device and the winding device. It is possible.

A purely mechanical thread braking mechanism and a mechanical / pneumatic thread braking mechanism are known (German published DE 21 19 880, DE 15 35 145). See German Utility Model 70 03 152 and Swiss Patent 538 417). These yarn braking mechanisms sense the yarn braking in the fed yarn and in the finished yarn and change its braking action so that this yarn tension is balanced. Such a thread braking mechanism can be used even in the present invention.

According to the invention, a particularly sensitive and fast responding device is provided with a measuring unit for detecting the yarn tension in the yarn interlacing zone or the winding zone, the measuring unit being an adjusting device and a control for adjusting the yarn braking mechanism. Coupled through the device. An electronically controllable thread braking mechanism that can be used here is the German Federal Utility Model No. 87 13 749.
It is known from the publication.

Hereinafter, the present invention will be described in detail with reference to the embodiments illustrated in the accompanying drawings.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a machine 1 for treating an endless synthetic multifilament yarn 2 is equipped with a yarn feeding bobbin 3, and a thread guide 4 is provided behind the yarn feeding bobbin.
Is provided. The yarn 2 passes through the yarn supplying roller pair 5 and is guided to the draft pin 6 which is the starting point of the draft.

Through the draft zone 7, the yarn 2 reaches the Galette / feeding roller 8/9, is wound around it several times and then reaches the yarn entanglement zone 10, where the capillaries of the yarn are conveyed by the yarn entanglement unit 11. "Entanglement," that is, they are randomly entwined with each other. The structure and working mode of the yarn entanglement unit in which work is carried out by such pneumatic pressure are known, and therefore will not be described in detail here.

In front of the yarn entanglement unit 11 in the yarn traveling direction, a yarn braking mechanism 12 which works under self-adjusting action is provided. The thread 2 passing through the winding zone 13 is threaded by the thread guide 14.
And reaches the winding unit 15. This winding unit consists of ring 16, traveler 17, spindle rail 1
8, a spindle 19 and a winding bobbin 20.

Here, the yarn tension in the region between the Galette / Yarn supply roller pair 8/9 and the winding unit 15 is essentially determined by the choice of the traveler 17, and the yarn braking mechanism 12 causes a small amount in the yarn entanglement zone 10. It is divided into regions of yarn tension and regions of high yarn tension in the winding zone 13.

Thread entanglement unit 11 and winding unit 15
By providing the thread braking mechanism 12 between the two, the thread tension in the winding zone 13 has on one hand a high enough value to form a tightly wound bobbin, but on the other hand the thread entanglement zone 10, That is, in the area of the yarn entanglement unit 11, a slight yarn tension advantageous for its function is obtained.

The thread braking mechanism 12 is a sensing device 2 according to the present invention.
1, the sensing device detects the yarn tension of the yarn running from the yarn braking mechanism 12 in the winding zone 13, and detects the yarn tension of the yarn braking mechanism through an action connecting line 22 indicated by a chain line.
Adjustments are made so that changes or fluctuations in the thread tension in the winding zone 13 do not adversely affect the thread entanglement zone 10, ie the thread tension remains as constant as possible in this thread entanglement zone.

The sensing device 21 is not related to the yarn 2 running from the yarn braking mechanism 12 as shown, but the yarn braking mechanism 12
If it concerns a yarn running in the direction, the yarn tension in the yarn entanglement zone is measured. This is because the yarn braking mechanism 12 divides both zones in such an arrangement.

FIG. 2 shows a thread-braking mechanism of simple construction, which operates purely mechanically under self-regulation. Thread 2
Runs between two fixed guide pins 23, 24 with another guide pin 25 provided therebetween. The guide pin 25 is provided on the lever 26. One end of this lever is immovably fixed, and this fixing part and the guide pin 2
In the region 27 between the position in which 5 is pivoted, it is formed as an elastic rod. The other end of the lever ends with a sensing device 21, which rests on the thread 2. A slider 28 is provided on the elastic rod,
This slider moves in the direction of arrow A on the rail 29 that is rigidly fixed.
It is possible to slide in the direction.

The braking action of the thread braking mechanism 12 on the thread 2 depends on the degree of penetration of the guide pin 25 between the guide pins 23 and 24. This penetration degree is determined by the position of the lever 26, and this position itself is It depends on the thread tension of the thread 2. As the thread tension increases, the sensing device pivots to the left due to its elastic holding force, the guide pins 23 and 2
The guide pin 25 is pressed between the four and penetrates deeply, thereby increasing the braking action of the thread braking mechanism 12.

The position of the slider 28 along the elastic rod 27 determines the lever position of the elastic rod and controls the effect of changes in thread tension on the thread braking action. FIG. 3 likewise shows a machine 1 for processing endless synthetic multifilament yarns, in which the winding unit 15
Serves to form the cross bobbin 30. The cross bobbin 30 is connected to a drive roller 31 so that a thread guide 32 reciprocates on a guide 33 on the outer circumference of the cross bobbin 30, and the yarn 2 is wound on the cross bobbin 30 rotated by the drive roller 31. . In the case of the structure configured for this hot draft, the yarn 2 passes through the heating cylinder 34 in front of the yarn feeding roller 5, passes through the draft zone 37 and the gallet / yarn feeding roller unit 8/9, and the yarn entanglement unit. Reaching 11. In front of the yarn entanglement unit, there is provided a turning roller 35 which is carried by a yarn and rotates freely. Due to the turning of the yarn carried out by the turning rollers 35, the structural height of the machine is reduced and the vibration of the yarn 2 in the yarn interlacing zone 10 or in the winding zone 13 does not reach the other zones. .

In the case of this embodiment, the yarn tension in the area between the gullet / yarn supply roller unit 8/9 and the winding unit 15 is determined by the ratio of the peripheral speeds of the gullet 8 and the drive roller 31, and the above-mentioned embodiment is used. As described above, the yarn braking mechanism 12 divides the yarn interlacing zone 10 into a slight yarn tension area and the winding zone 13 into a high yarn tension area.

The sensing device 21 is connected to an oscillator 36, which depends on the thread tension for measuring the measured value.
7, the electric adjusting device 38 of the yarn braking mechanism 12 is controlled by this control device. The average braking action of the thread braking mechanism can be adjusted in the control device 37.

FIG. 4 shows the course of the yarn tension along the yarn traveling path. In this case, the abscissa indicates the thread tension K, and the ordinate indicates the thread travel progress F through the device. The numbers on the left side of the ordinate indicate the corresponding zones, and the numbers on the right side indicate the units along the yarn path.

In the draft zone 7, the yarn tension 39 is at its maximum corresponding to the process conditions. In the embodiment according to FIG. 1, the thread tension is divided by the draft pin 6 into a small (upper) thread tension area and a higher (lower) thread tension zone indicated by the chain line. In the area between the gullet / yarn supply roller unit 8/9 and the winding unit 15, the yarn tension shown by the alternate long and short dash line is generated, and this yarn tension is reduced by the yarn braking mechanism 12 to a slight yarn tension 40 in the yarn entanglement zone 10. Winding zone 13
Inside, it is divided into high thread tensions 41, 42. Due to the adjusting action of the yarn braking mechanism 12, the yarn tension 40 in the yarn entanglement zone 10 is, for example, 4 when the yarn tension in the winding zone is 4.
It is maintained even if it fluctuates between 1 and 42.

The yarn tension 40 in the yarn entanglement zone 10 is adjusted by the control device 37, so that the yarn tension 4 in the winding zone 13 is
The yarn tension 40 provided in the yarn entanglement zone 10 is maintained even if 1, 42 fluctuate.

The drawings show only two possible embodiments of the machine according to the invention. Various requirements such as cold draft or hot draft, cup forming or cross bobbin forming, mechanically or electrically controlled yarn braking mechanism, scanning of yarn tension in yarn interlacing zone or winding zone, etc. are simple methods. Can be combined in various ways.

[0030]

According to the above-mentioned structure, the yarn having a desired or desired degree of yarn tension in the winding zone is present in spite of the required or desired strength of the yarn tension. The advantage is that the counteraction to tension is avoided by simple technical means.

[Brief description of drawings]

1 is a schematic view of a machine for processing an endless synthetic multifilament yarn with a cold draft mechanism and a winding unit consisting of a ring, a traveler and a spindle.

FIG. 2 is a diagram showing an operating principle of a self-adjusting thread braking mechanism having a simple structure.

FIG. 3 is a schematic view of a machine for processing an endless synthetic multifilament yarn, which comprises a hot draft mechanism and a winding unit for forming a cross bobbin.

FIG. 4 is a diagram showing the progress of the yarn tension along the yarn traveling path.

[Explanation of symbols]

1 Machine for processing endless synthetic multifilament yarn 2 Yarn 3 Yarn feeding bobbin 4 Thread guide 5 Threading roller pair 6 Draft pin 7 Draft zone 8 Galette 9 Yarn feeding roller unit 10 Yarn entanglement zone 11 Yarn entanglement unit 12 Yarn Braking mechanism 13 Winding zone 14 Thread guide 15 Winding unit 16 Ring 17 Traveler 18 Spindle rail 19 Spindle 21 Sensing device 22 Working coupling line 23, 24 Guide pin 25 Intermediate guide pin 26 Lever 27 Area 28 Slider 29 Rail 37 Control device 39 Thread tension 40 Thread tension in the yarn entanglement zone 41,42 Thread tension in the winding zone

Claims (4)

[Claims] 1. A machine for processing an endless synthetic multifilament yarn, which comprises a yarn feeding mechanism, a yarn entanglement unit, a yarn braking mechanism and a yarn winding unit which are arranged one behind the other in the yarn running direction. A sensing device (21) is provided for detecting the tension of the yarn (2) in the zone (10) or the yarn winding zone (13) and adjusting the action of the yarn braking mechanism (12) so as to obtain a tension balance. A machine for processing endless synthetic multifilament yarns, characterized in that 2. The sensing device (21) comprises a measuring unit (3).
6), characterized in that the measuring unit is connected via a control device (37) to an adjusting device (38) for adjusting the action of the thread braking mechanism (12). Machine described. 3. Machine according to claim 1, characterized in that a deflection roller (35) is provided in front of the thread braking mechanism (12). 4. Machine according to claim 1, characterized in that a deflection roller (35) is provided in front of the thread braking mechanism (12).