LU502184B1 - Workplace of a thread balloon-forming textile machine, in particular a double-wire twisting machine - Google Patents

Abstract

Workstation of a thread balloon-forming textile machine, in particular a double-wire twisting machine The invention relates to a workstation of a thread-balloon-forming textile machine, in particular a double-wire twisting machine, for twisting one or more threads, with a spindle rotatably mounted about a hollow spindle axis for receiving a supply bobbin, one in one of the free ends of the Spindle opposite area coaxially and rotatably arranged around the spindle axis spindle rotor and a thread separating device with a separating element adjustable between a separating position projecting into a thread path and a rest position releasing the thread path. In order to provide a workstation for a thread balloon-forming textile machine, in particular a double-wire twisting machine, in which long thread residues are avoided in the event of a thread interruption, it is provided that the thread separating device is arranged in the area of the spindle rotor in such a way that the separating element can be adjusted between a separating position close to the spindle and a rest position away from the spindle .

Description

AI0009LU

IP/MINU502184 05/30/2022

Description

Workplace of a thread balloon-forming textile machine, in particular one

Double wire twisting machine

The invention relates to a workstation of a thread balloon-forming textile machine, in particular a double-wire twisting machine, for twisting one or more threads, with a spindle rotatably mounted about a hollow spindle axis for receiving a

Feed spool, - a spindle rotor arranged coaxially and rotatably about the spindle axis in an area opposite the free end of the spindle, and - a thread separating device with a thread separating device projecting into a thread path

Separating position and a rest position that releases the thread path can be adjusted

Separator.

Since a simple thread has the strength and/or its uniformity

Since it often cannot meet the requirements placed on it during further processing or the end product, it is common practice in the textile industry to initiate yarn finishing by twisting two or more threads together. This textile process

Yarn finishing is generally referred to as twisting, although there are different types of twisting, e.g. B. a distinction is made between double-wire twisting and cabling.

In double-wire twisting, for example, two threads are connected to each other with an S or Z twist, with both threads each receiving an additional twist. At the

In cabling, on the other hand, a second thread is rotated around a template thread, with the rotation of the individual thread remaining essentially unchanged.

When it comes to double-wire twisting, there are also different types of feed in terms of the way in which threads are fed to the twisting machine. The feed threads can come, for example, from a folded feed bobbin, which is attached to the spindle via the free end and which is then stored in a bobbin pot of the spindle or from two in the bobbin pot

One feed thread is unwound from each of the feed spools arranged one above the other in the spindle. -1-

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In the present application, the term thread includes all linear structures, such as yarns,

Foil ribbons, tubular and ribbon-shaped textiles and the like. For simplicity, the term “thread” is used in this application to refer to all possible alternatives

Embodiments used.

In all known textile machines that form thread balloons, in particular

At least one running thread in the form of a thread balloon circles a spindle in the area of each workstation before it is rotated using a thread balloon

Winding device is wound into a package.

At a workstation on a twisting machine operating according to the double-wire twisting process, for example, a single or a two- or multiple-ply thread is drawn upwards from a supply bobbin arranged in a preferably provided bobbin pot and via a hollow spindle axis to a position - based on the position of use - preferably below the thread Rotatably mounted, drivable arranged in the provided coil pot

Thread twist imparting element, for example as a combination of a storage disk and a

Drop plate is designed, guided. The running, folded thread leaves the discharge plate, which can be combined with a storage disk, for example, via a radial opening

Storage disk or a thread guide ring and wraps around the storage disk in the desired manner

Circumference and is then guided over the outer edge of the release plate into the balloon.

Double-wire twisting machines have the disadvantage that they are used to re-tighten threads in the event of a thread break or a deliberately created thread separation through a thread above the

Tilt the thread separating device arranged in the bobbin pot. The thread separating unit is activated, for example, when a sensor detects intolerable thick or thin areas that need to be cleaned. The tightening essentially results from the centrifugal forces acting on the remaining thread sections in the event of a thread break or thread separation. A tightened thread can, especially with large ones

Remaining thread lengths, such as those arranged above the spindles

Thread separating device can result in coiling or row thread breaks. There is also a risk that the thread will be broken on existing machine parts. A large amount of broken fiber material increases contamination and there is a risk of fiber/dust entanglement. This has an overall increased -2-

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IP/MINU502184 05/30/2022

This results in maintenance effort, which in extreme cases can affect neighboring areas

Workplaces and increased power consumption can occur due to the rolls being removed from the spindle or not being removed properly.

Proceeding from this, the object of the invention is to provide a workstation for a thread balloon-forming textile machine, in particular a double-wire twisting machine, in which, in the event of a thread interruption, long thread residues are avoided and short remaining thread lengths are produced.

The invention solves the problem by providing a workplace with the features of claim 1.

Advantageous developments of the invention are specified in the dependent claims.

What is characteristic of the workstation according to the invention is that the thread separating device is arranged in the area of the spindle rotor in such a way that the separating element can be adjusted between a separating position close to the spindle and a rest position away from the spindle.

The thread cutting device of the workstation according to the invention serves to control the thread in the event of an event detected by a suitable detector or sensor, for example in the case of a singling and / or an unauthorized thick or thin spot or even when a previously determined thread length to be processed is reached to separate. The arrangement of the thread cutting device in the area of the spindle rotor and therefore as far as possible - related to the

Position of use - far down on the non-rotating bobbin pot ensures that the

Separation takes place in an area close to the spindle, so that only a small remaining thread length remains exposed to centrifugal forces, which reduces the risk of operational disruptions as a result

Wrapping or the like is particularly advantageously avoided.

For controlled thread separation, the thread separating device has a separating element which can be adjusted between a separating position projecting into the thread path and a rest position releasing the thread path. In the normal operating state of the workstation, the separating element is in the rest position in which it does not influence the thread path. In the

If a thread separation needs to be carried out, the separating element is adjusted from the

Rest position in the separation position, with the separation element in the regular position in the separation position

Thread path protrudes and, in cooperation with the ballooning thread, separates it in a controlled manner. The thread cutting device is positioned in relation to the spindle at the work station -3-

AI0009LU

IP/MINU502184 May 30, 2022 arranged that the separating element is displaced from a rest position away from the spindle, preferably briefly, into a separating position close to the spindle when the thread separating device is activated, i.e. H. the separating element is after being moved from the rest position to the

Separating position, in which it engages with the thread and separates it, briefly arranged closer to the spindle than in the rest position.

The arrangement of the thread separating device in the area of the spindle rotor ensures particularly short remaining thread lengths, so that the risk of disruptions due to winding is avoided particularly reliably. Because the separating element is displaced towards the spindle during an adjustment from the rest position to the separating position, the

Thread cutting device can also be arranged particularly easily and inexpensively in an area of the workstation surrounding the spindle. This arrangement of the

Thread cutting device outside the spindle therefore offers good accessibility in the event of

Maintenance and repair work. There is also the possibility of existing

To easily redesign double-wire twisting machines in the manner according to the invention. The separation of the thread close to the spindle - in relation to the thread travel path - enables a safe interruption of the production process, whereby due to the

Arrangement of the thread cutting device in the area of the spindle rotor minimizes the risk of possible winding caused by centrifugal force.

The arrangement and orientation of the thread separating device and thus the orientation of the

Displacement of the separating element during an adjustment between the separating position and the

In principle, the rest position can be freely selected. After a particularly advantageous one

However, an embodiment of the invention provides that the thread separating device is arranged in such a way that the separating element can be adjusted between the separating position and the rest position essentially at right angles to the spindle axis. A corresponding arrangement ensures a separation close to the spindle in a particularly reliable manner if necessary

Thread and also allows a particularly simple and cost-effective arrangement of the

Thread cutting device at the workplace. Particularly advantageously, it is provided that the thread separating device is arranged in such a way that the separating element is adjustable essentially at right angles to the thread path, so that the interaction between the

Separating element and the thread to be separated takes place in a particularly reliable manner and one

Separation of the thread can be effected in a predetermined manner. -4-

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The arrangement of the thread cutting device in the area of the spindle rotor is fundamentally freely selectable. For example, the thread separating device can be arranged in such a way that the

Thread separating device - based on the position of use - is arranged below a discharge plate of a thread twisting element formed from the discharge plate and a storage disk and the separating element exerts an upward movement for thread separation.

According to a particularly advantageous embodiment of the invention, however, it is provided that

Thread separating device is arranged in such a way that the separating element is in one through

Thread twist imparting element, d. i.e. formed by the storage disk or the discharge plate

Plane can be adjusted between the rest position and the separation position, a plane extending through the thread twist distribution element being understood to mean any plane that runs perpendicular to the spindle axis and lies within the discharge plate or the storage disk. In an arrangement of the thread separating device according to this development of the invention, the adjustment plane of the separating element - based on the position of use - is arranged above the rotating spindle rotor, whereby the adjustment plane of the separating element can be positioned as low as possible at the level of the non-rotating bobbin pot. For an alternative

Embodiment of the invention can further be provided that the adjustment level of the

Separating element - based on the position of use - just above one through the

Thread twist imparting element extending plane, with this being a distance from the

Level of up to 5 cm is understood.

The design of the thread separating element is fundamentally freely selectable, with any

Geometry is suitable that prevents the ballooning thread from escaping from the separating geometry. This could be realized, for example, by a catching geometry that prevents the ballooning thread from rotating, regardless of the distance at which it is located

Bobbin pot moves past, picks up and prevents the thread from escaping. According to a particularly advantageous embodiment of the invention, however, it is provided that

Separating element can contact the non-rotating bobbin pot and thus prevents the ballooning thread from escaping through an otherwise remaining gap between the separating element and bobbin pot, so that a particularly reliable interaction of the

Separating element with the thread is ensured in the separating position. In addition, the design ensures particularly short remaining thread lengths, since the aforementioned height represents the first contactable (since non-rotating) surface - in relation to the position of use - when viewed from below. In addition, the thread cutting device can be used in this area of the -5-

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IP/MINU502184 05/30/2022

Arranging the workplace is particularly easy and cost-effective and is suitable for any

Repair or maintenance work is easily accessible to the operator. In addition, this leads

Arrangement does not interfere with the operator's usual work processes.

According to a further embodiment of the invention, it is provided that the separating element in the separating position passes through a bore in a cylindrical element that coaxially surrounds the spindle

Balloon limiter extends. According to this embodiment of the invention, the spindle is surrounded by a cylinder sleeve which delimits the thread balloon and which limits the maximum expansion of the thread balloon

Thread balloons set. In the case of arranging a coil pot, it forms a cylindrical shape

Balloon limiter and the spool pot have an annular gap in which the thread moves from an area - in relation to the position of use - below the spindle into an area

Winding element is guided above the spindle.

The arrangement of the thread separating device such that the separating element is in the

Separation position through a hole in a cylindrical coaxial surrounding the spindle

Balloon limiter extends, ensuring that in the rest position of the separating element

Balloon limiter unaffected by the thread cutting device as a guide element for the

Thread balloon is used. The hole is particularly preferably in a location away from the thread running

Section of the coil pot arranged, d. H. in an area of the balloon limiter that is not touched by the thread balloon during the twisting process, so that the hole does not

has an influence on the functioning of the balloon limiter, or the thread does not pass through it

bore is influenced.

The design of the adjustment of the separating element between the rest position and the

Separation position can basically be done in any way. For example, electric or electromagnetic drives are conceivable, by means of which the separating element can be adjusted particularly easily and quickly if necessary. According to a particularly advantageous embodiment of the

However, according to the invention, the thread separating device has a pneumatic drive for adjusting the separating element. The use of a pneumatic drive is characterized by the fact that it is usually already existing

Supplying the workstations with compressed air can be made particularly simple and cost-effective and, in addition, a particularly reliable shift between the

Rest position and the disconnected position guaranteed. After a particularly advantageous one

An embodiment of the invention provides that the separating element moves in the direction of the -6-

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The rest position is biased, so that if necessary, automatic and immediate

The separating element is moved back into the rest position. Disturbances caused by this

Separating elements when regular twisting operations are resumed can thus be avoided particularly reliably.

The design of the separating element, in particular its contact area that interacts with the thread in the separating position, is fundamentally freely selectable. However, according to a particularly advantageous embodiment of the invention, the separating element has one of one

Cut out various separating edges that can be engaged with the thread. According to this

In an embodiment of the invention, the contact area of the separating element is not in the manner of a

Knife or a knife edge formed, but shaped in such a way that it is in

Interaction with the thread results in reliable separation, for example by breaking. The absence of a cutting-like design of the separating element leads to a long service life of the separating element and also reduces the risk of a

Equipment operator in the event of contact with a cutting edge or knife

incurs injuries.

The design of the housing guiding the separating element is fundamentally freely selectable.

However, according to a particularly advantageous embodiment of the invention, the housing has a guide surface which is inclined to the spindle axis and is designed to correspond to the thread path of the ballooning thread in the area of the separating element. According to this

In an embodiment of the invention, the separating element can be particularly close to the non-rotating one

Bobbin pot can be positioned without affecting the twisting process, which means the

Design cost-effective and can also be retrofitted in smaller mechanical engineering rooms.

Furthermore, the guide surface also functions as an entry bevel for the assembly of

Balloon limiters, which in particularly long versions can reach up to - based on the

Position of use - below the height of the discharge plate are common.

An embodiment of the invention is explained below with reference to the drawings. Shown in the drawings:

Fig. 1 in a perspective view of a first embodiment

Thread cutting device in an installed position on a section shown

double wire twisting machine; -7-

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IP/MINU502184 05/30/2022

2 is a perspective sectional view of the thread cutting device from FIG. 1,

Fig. 3 is a front view of the thread separating device from Figures 1 and 2 and

Fig. 4 is a side view of a second embodiment of a double-wire twisting machine with a thread separating device.

In Figure 1 there is a perspective view of the area of a workplace

Double-wire twisting machine shown, in which a thread separating device 4 in the area of

Spindle rotor is arranged below a bobbin pot 1. The spindle rotor is coaxial with one

Spindle axis arranged in the area of an area opposite a free end of a spindle, the spindle serving to accommodate a payout spool, not shown here, which is attached to the free end.

As part of the twisting process, a folded thread is passed through the hollow spindle from above and exits via a radial opening of a storage disk 16 and then wraps around the storage disk 16 to the desired extent and is then guided over an outer edge of a discharge plate 17 into a balloon limiter 2. There the thread is then in one

Annular gap between the inside of the cylindrical spindle facing the spindle

Balloon limiter 2 and the spindle to one arranged above the spindle

Winding device guided (see Figure 4).

Adjacent to that formed from storage disk 16 and discharge plate 17

Thread twisting element, the thread separating device 4 is arranged, which is a

Separating element 5, which is adjustable between a separation position shown in Figures 1 and 2 and a rest position, not shown here. In the disconnected position it sticks out

Separating element 5 through an annular opening 6 below the balloon limiter 2 into one

Thread path of a thread not shown here, with the separating element 5 in

Interaction with the thread cuts it. In the rest position, not shown, the separating element 5 is arranged retracted within a housing 11 of the thread separating device 4 and does not interfere with the thread balloon formation.

The housing 11 of the thread separating device 4 points to the adjustable accommodation of the

Separating element 5 has a cylindrical piston chamber 10, within which a piston element 9 is slidably mounted. The separating element 5 is connected to the piston element 9, with the -8- being supplied with compressed air to the piston chamber 10 via a compressed air connection 8.

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IP/MINU502184 05/30/2022

Separating element 5 can be adjusted into the separating position shown in Figure 2. The separating element 5 is shifted back into the rest position, not shown here, after a

Compressed air relief of the piston chamber 10 by a helical compression spring 7, which has a

End rests on the piston element 9 and the other end rests on a shoulder in the housing 11 which runs coaxially to an opening 13 and through which the separating element 5 extends. A thread guide surface 15 is arranged on the outside of the housing 11 and is aligned inclined to the spindle axis in accordance with the shape of the thread path of the thread balloon.

The balloon limiter 2 shown in Figure 1 is arranged at a distance from it via a magnetic ring 14, so that the separating element 5 can be moved into the thread path without interference.

Figure 4 shows a further embodiment in which the separating element 5 extends through a bore 18 in the cylindrical balloon limiter 2. The adjustment plane of the separating element 5 runs just above a plane extending perpendicular to the spindle axis through a discharge plate 17, with the discharge plate 17 together with a storage disk 16 forming the thread twist distribution element. -9-

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List of reference symbols 1 Spindle pot 2 Balloon limiter 3 Spindle bearing 4 Thread cutting device

Separating element 6 Opening 7 Helical compression spring 8 Compressed air connection 9 Piston element

Piston chamber 11 Housing 12 Machine frame 13 Opening 14 Magnetic ring

Guide surface 16 Storage disk 17 Release plate 18 Hole -10 -

Claims (10)

AI0009LU IP/MINU502184 May 30, 2022 Patent claims 1. Workstation of a thread balloon-forming textile machine, in particular a double-wire twisting machine, for twisting one or more threads, with - a spindle rotatably mounted about a hollow spindle axis for receiving a supply bobbin, - an area in an area opposite the free end of the spindle that is coaxial and rotatable about the Spindle rotor arranged on the spindle axis and - a thread separating device (4) with a separating element (5) which can be adjusted between a separating position projecting into a thread path and a rest position releasing the thread path, characterized in that the thread separating device (4) is arranged in the area of the spindle rotor in such a way that the Separating element (5) can be adjusted between a separating position close to the spindle and a rest position away from the spindle. 2. Workstation according to claim 1, characterized in that the separating element (5) is adjustable essentially at right angles to the thread path. 3. Workstation according to claim 1 or 2, characterized in that the thread separating device (4) is arranged such that the separating element (5) is adjustable between the separating position and the rest position essentially at right angles to the spindle axis. 4. Workstation according to one or more of the preceding claims, characterized in that the thread separating device (4) is arranged such that the separating element (5) in the area of a plane extending through a discharge plate (17) or a storage disk (16) between the The rest position and the separation position can be adjusted. 5. Workstation according to one or more of the preceding claims, characterized in that the separating element (5) in the separating position through a bore (18) in a cylindrical balloon limiter (2) -11 - which coaxially surrounds the spindle. AIOOO9LU IP/MINJ502184 May 30, 2022. 6. Workstation according to one or more of the preceding claims, characterized in that the bore (18) is arranged in a section of the balloon limiter (2) remote from the thread run. 7. Workstation according to one or more of the preceding claims, characterized in that the thread separating device (4) has a pneumatic drive for adjusting the separating element (5). 8. Workstation according to one or more of the preceding claims, characterized in that the separating element (5) is biased towards the rest position. 9. Workstation according to one or more of the preceding claims, characterized in that the separating element (5) has a separating edge that is different from a cutting edge and can be brought into engagement with the thread. 10. Workstation according to one or more of the preceding claims, characterized in that the housing (11) has a guide surface (15) which is inclined to the spindle axis and is aligned with the thread path of the ballooning thread in the area of the separating element (5). -12-