EP1917204B1 - Spooling station for a textile machine which produces crosswound spools - Google Patents

Abstract

The invention relates to a spooling station for a textile machine which produces crosswound spools, having an auxiliary unwinding device (23) which has a stationary, tubular thread guide device (36) which is installed above a spinning cop (9) which is positioned in the unwinding position. According to the invention, it is provided that the thread guide device (36) has, at the input side, a thread guide insert (39) which is arranged so as to be exchangeable.

Description

The invention relates to a winding unit of a cheese-producing textile machine according to the preamble of claim 1.

In connection with automatic winder, it has long been known to arrange devices in the field of winding units of these textile machines, which improve the removal of the thread from the spinning heads.
For example, numerous patents describe devices which are arranged above a spinning cop positioned in the spinning position and which supports the detachment of the thread from the spinning cop.
That is, devices that ensure that the thread tension is held during the Umspulprozesses at a harmless level for the thread.

Such, also referred to as Fadenabzugsbeschleuniger device is for example in the DE 44 18 312 A1 described.

This known Fadenabzugsbeschleuniger has a guide surface for the thread, which has the shape of a truncated cone, wherein the large diameter faces the spinning cop.
The truncated cone shell is penetrated by a truncated pyramid shell so that the edges of the truncated pyramid shell pierce the truncated cone shell and thereby form notches.

Compared with other known thread take-off accelerators, these devices have the advantage that the thread balloon that forms when the thread is pulled off the head of the spinning cop, not destroyed or suppressed, but only shaped.

Furthermore, in the DE 44 06 076 A1 and / or the DE 42 21 559 A1 Textile machines producing cross-wound bobbins, which in the region of their winding stations each have a multi-part, tube-shaped unwinding auxiliary device.

According to DE 44 06 076 A1 each of these Abspulhilfsvorrichtungen consists of three telescoped tubular thread guide elements.
That is, a lower, lowered over the Spinnkops guide element is guided vertically adjustable on a central yarn guide tube, which in turn is fixed by a clamping means to another tubular member which is stationary on a mounting plate of the winding unit. The first tubular thread guide element, which is cone-shaped in the region of its lower edge, is defined during the rewinding operation by means of an associated drive so lowered over the spinning cop, that the cone is always positioned in the region of the so-called Kopskegels the spinning cop. The middle thread guide tube, which is fixed by a clamping device on the upper tubular member, remains during Umspulvorganges in its tuned, for example, at the beginning of a new batch to the respective length of the spinning cops to be machined installation position and has on the input side a bottleneck.
Through this inlet-side constriction of the central thread guide tube, which is positioned just above the tube tip of the spinning cop to be transposed, a multiple thread balloon is divided.

The DE 42 21 559 A1 relates to a winding unit with a comparable Abspulhilfsvorrichtung.

This known Abspulhilfsvorrichtung has a defined height adjustable, lowered over the Spinnkops, first thread guide element on which a likewise height-adjustable mounted thread guide bell is supported. The thread guide bell is guided on a slide bar between two stops, by which the maximum adjustment of the terminal is specified and has, viewed in the direction of yarn travel, on the output side a bottleneck.
Also in this known device, the length of a thread balloon, which, as explained above, adjusts in a spinning cop in the thread withdrawal head, limited by the position of the bottleneck of the thread guide.

Since the bottlenecks of the above-described thread guiding elements are constantly in contact with the running thread during the rewinding process due to the rotating yarn balloon, these areas are exposed to high wear.
That is, the thread guide elements must be constantly checked for wear, especially in the area of their bottlenecks and replaced if necessary, the thread guide elements.

By the U.S. Patent 5,494,231 Winding machines are known in which in each case a special, pneumatically acted thread receiving device is installed in the field of winding units.
The thread takeup device is arranged in front of the unwinding position of the winding unit and has a lowerable via a spinning cop, acted upon with compressed air bell. The bell is in turn connected to an adapter to which a vacuum-loadable gripper tube can be docked.
In addition, a ring-shaped balloon crusher is attached to the bell in the region of a slot open to the unwinding position by means of bolts, so that both the spinning cop and the thread taken up by the spinning cop can be easily transferred into the unwinding position of the winding unit.

Furthermore, annular balloon rings are known, inter alia, in connection with twisting machines, which assisted in the production of Zwwinspulen the unwinding of the original thread of so-called disc coils.
The diameter of this annular, set on a ring rail of the twisting machine, for example in the DE 37 34 467 A1 described balloon rings is well above the diameter of the disc coils.
Since these balloon rings are exposed during operation by the thread of a considerable load, the balloon ring on a replaceable inner ring, which is designed as a wearing part.
This means, if necessary, the inner rings of the balloon rings can be replaced without the balloon rings must be carefully unscrewed from the ring rail of the twisting machine before.

Starting from winding units of the type described above, the invention has the object to improve such winding units to the effect that on the one hand high winding speeds can be realized, but on the other hand wear parts are easily and inexpensively replaceable.

This object is achieved by a winding unit, as described in claim 1.

Advantageous embodiments of the invention are the subject of the dependent claims.

The inventive design of the winding unit has the particular advantage that not only the possibility is given by the use of a thread guide device with a replaceable thread guide insert to operate the winding unit with high winding speed, but that, if necessary, there is the possibility that the strongest during the winding operation claimed component of this yarn guide device to renew easily. That is, with a corresponding wear of the thread guide insert this can be exchanged for a corresponding new component.

As described in claim 2, it is provided in an advantageous embodiment that the thread guide insert is fixed by means of a magnetic holder non-positively and releasably connected to the thread guide device. Such a magnetic holder, which, as described in claim 3, preferably ferromagnetic projections and arranged in receiving bores permanent magnets, allows a quick change of the thread guide insert, without the use of a tool is necessary.

According to claims 4 and 5, the thread guide insert is in a preferred embodiment at least partially made of a wear-resistant material, preferably made of a technical ceramic material. That is, the thread guide insert consists of a base body, for example, the cost-effective in printing or. Injection molding method is made of a metal or a plastic and are arranged on the ferromagnetic projections for the magnet holder and a wear-resistant thread inlet part. This yarn inlet part, which, as already mentioned above, preferably made of a technical ceramic material is made, it is insoluble, for example, by gluing, attached to the base body.
Such a constructed thread guide insert can not only be produced relatively inexpensively but is also characterized by a long service life.

In a first embodiment, which is described in claim 6, the thread guide insert has a clear width corresponding to the clear width of the tubular thread guide device.
As an advantage, however, has set forth in claim 10 embodiment, in which the clear width of a loop-like opening of the thread guide insert is below the clear width of the thread guide device.
In such an embodiment, the possibility exists by appropriate shaping of the opening, for example, depending on the present yarn material or the thread thickness, to take specific influence on the shape of the thread balloon.
The eye-like opening of the thread guide insert, for example, as described in claim 11, have a round cross section, or, as set forth in claim 13, have a polygonal cross-section.

The yarn inlet region of the yarn guide insert is preferably funnel-shaped, wherein the inlet surface of the yarn guide insert, viewed in longitudinal section, either rectilinear (Anspr. 8) runs or convexly curved (Anspr. 9) is formed.
In both embodiments, it is ensured that the thread on the one hand at the beginning of the winding process can be easily blown up or sucked through the eye-like opening and that on the other hand, the rotating thread during the winding process, when it rotates in the opening, is not damaged.

In a further embodiment described in claim 12, the convexly curved inlet surface of the yarn guide insert additionally has notches.
These notches initiate vibrations on the revolving thread, which also have a positive effect on the thread balloon.

Further details of the invention are explained below with reference to an embodiment shown in the drawings.

Fig.1

in Seitenansicht eine Spulstelle einer Kreuzspulen herstellenden Textilmaschine mit einer Abspulhilfsvorrichtung, die eine stationäre, rohrförmige Fadenführungseinrichtung aufweist,

Fig.2

eine perspektivische Ansicht der in Fig. 1 schematisch dargestellten Abspulhilfsvorrichtung,

Fig.3

eine erste Ausführungsform eines endseitig an der Fadenführungseinrichtung angeordneten Fadenführungseinsatzes,

Fig.4

eine zweite Ausführungsform eines endseitig an der Fadenführungseinrichtung angeordneten Fadenführungseinsatzes,

Fig.5

eine dritte Ausführungsform eines endseitig an der Fadenführungseinrichtung angeordneten Fadenführungseinsatzes,

Fig.6

eine vierte Ausführungsform eines endseitig an der Fadenführungseinrichtung angeordneten Fadenführungseinsatzes,

Fig.7

eine fünfte Ausführungsform eines endseitig an der Fadenführungseinrichtung angeordneten Fadenführungseinsatzes,

Fig.8

eine sechste Ausführungsform eines endseitig an der Fadenführungseinrichtung angeordneten Fadenführungseinsatzes,

Fig.9

eine Ansicht auf die Fadenführungseinrichtung von unten, mit in Aufnahmebohrungen angeordneten Permanentmagneten,

Fig.10

eine weitere Ausführungsform eines Fadenführungseinsatzes mit ferromagnetischen Fortsätzen,

Fig.11

ein Ansicht auf den Fadenführungseinsatz, gemäß Pfeil F der Fig. 8,

Fig.12

ein Ansicht auf den Fadenführungseinsatz, gemäß Pfeil F der Fig. 7,

It shows:

Fig.1

in side view a winding unit of a cross-wound textile machine with a Abspulhilfsvorrichtung having a stationary, tubular thread guide device,

Fig.2

a perspective view of in Fig. 1 Abspülhilfsvorrichtung shown schematically,

Figure 3

a first embodiment of an end arranged on the thread guide device thread guide insert,

Figure 4

a second embodiment of a thread guide on the end of the thread guide means arranged,

Figure 5

a third embodiment of a thread guide on the end of the thread guide means arranged,

Figure 6

A fourth embodiment of an end arranged on the thread guide device yarn guide insert,

Figure 7

a fifth embodiment of an end arranged on the thread guide device thread guide insert,

Figure 8

6 shows a sixth embodiment of a thread guiding insert arranged at the end on the thread guiding device,

Figure 9

a view of the thread guide device from below, arranged in receiving bores with permanent magnets,

Figure 10

a further embodiment of a thread guide insert with ferromagnetic extensions,

Figure 11

a view of the thread guide insert, according to arrow F of Fig. 8 .

Figure 12

a view of the thread guide insert, according to arrow F of Fig. 7 .

In FIG. 1 is a side view schematically a cross-wound producing textile machine, in the embodiment, a so-called cross-winding machine 1, shown.
Such spooling machines 1 have between their (not shown) Endgestellen a plurality of similar work or winding units 2.
On these winding units 2, as is known and therefore not explained in detail, which are produced on a (not shown) ring spinning machine, only relatively little yarn material Ausweisenden spinning cops 9 rewound to large-volume cheeses 11.

The finished cheeses 11 are then transferred by means of an automatically operating service unit, such as a cheese changer, on a machine-spooled cross-bobbin transport device 21 and transported to a machine end side (not shown) Spulenverladestation or the like.

Such spoolers 1 have either, as in Fig. 1 indicated, a logistics device in the form of a bobbin and tube transport system 3 on or in the area of numerous jobs 2 each a work-station own coil magazine, preferably a so-called round magazine is arranged.

In a bobbin and tube transport system 3 run, set on transport plates 8 in a vertical orientation, spinning cops 9 or empty tubes 34 to.
From this coil and sleeve transport system 3 is in the FIG. 1 only the Kopszuführstrecke 4, the reversibly driven storage section 5, one of the leading to the winding units 2 transverse transport sections 6 and the sleeve return path 7 shown.
As indicated, the supplied spinning cops 9 are thereby initially positioned and rewound in a unwinding position 10, which is located in the region of the transverse transport sections 6 at the winding stations 2.

The individual winding units 2 have for this purpose, as is known and therefore only indicated, on various thread treatment and thread handling devices that not only ensure that the spinning cops 9 too bulky Reverse spools 11 can be rewound, but also ensure that the thread during the rewinding monitored and detected thread defects can be cleaned.

One of these per se known devices is the winding device 24, which has a coil frame 18 which is movably mounted about a pivot axis 19, a coil drive means 26 and a Fadenchangiereinrichtung 28.
At the in FIG. 1 illustrated embodiment, the cross-wound bobbin 11 during the winding process, for example, with its surface on a single-motor actuated drive drum 26 and is driven by this frictional engagement.

The traversing of the thread during emergence onto the cross-wound bobbin 11 by means of a Fadenchangiereinrichtung 28, which has a finger thread guide 29 in the present embodiment.
Such Fadenchangiereinrichtungen are known and, for example in the DE 198 58 548 A1 described in detail.

As already mentioned in the introductory part of the description, such winding units 2 generally also each have a thread connecting device 13, preferably a pneumatically operated splicing device, a suction tube 12 which can be subjected to negative pressure and a gripper tube 25 which can also be pressurized with negative pressure.
The suction tube 12 and the gripper tube 25 are connected to a machine's own vacuum crossbar 32, which in turn is in communication with a vacuum source 33.

Such jobs 2 usually also have a lower thread sensor 22, a thread tensioner 14, a Thread cleaner 15 with thread cutting device 17, a yarn tension force sensor 20 and a paraffining device 16. Furthermore, the workstations 2 are equipped with a Abspulhilfsvorrichtung 23, which serves both for the pneumatic transfer of a spinner 9 ready underlying lower thread to a vacuum-loaded gripper tube 25, as well as during the winding process ensures that the thread balloon, the thread running from the spinning cop 9 arises in the sense of lowering the thread tension is positively influenced.

This Abspulhilfseinrichtung 23 is, as in Fig. 2 indicated in perspective view, essentially from a vertically displaceably mounted balloon limiter 27, a tubular thread guide device 36 and an adapter 40. That is, the balloon limiter 27 is defined by a drive 30 in the vertical direction R adjustable so that the balloon limiter 27 during the winding process , following the unwinding step of the spinning cop 9, can be moved downwards.
Preferably, the lower edge 50 of the element 27 is positioned approximately at the level of the Kopskegels 51 of the spinning cop 9.

As in the FIGS. 1 and 2 indicated, the thread guide device 36 is preferably formed in several parts.
That is, the thread guide device 36 consists of a fixed to a stationary adapter 40 top tube 37 and a relative to the top tube 37 slidably disposed in its installation height adjustable down tube 38. In the installed state, the down tube 38 is always set at such a height on the top tube 37, that a thread guide insert 39 arranged on the down tube 38 of the thread guiding device 36 is arranged just above the tube tip of a spinning cop 9 positioned in the unwinding station 10.

According to the invention this thread guide insert 39, whose individual embodiments in the FIGS. 3 to 12 are shown in detail, easily interchangeable arranged on the down tube 38 of the thread guide device 36.

As can be seen from the various drawings, the inlet region 45 of the yarn guide insert 39 is funnel-shaped.
The inlet surface 46 is either, as in the FIGS. 3, 5 and 7 shown, viewed in longitudinal section, rectilinear or the inlet surface 46, is, as in the FIGS. 4, 6, 8 as well as 13 and 14 shown, convexly curved.
In the embodiments according to the FIGS. 3 and 4 corresponds to the inside diameter d of the thread guide insert 39 of the clear width D of the down tube 38 of the thread guide device 36th
The Figures 5-8 show thread guide inserts 39 with a loop-like opening 47th
That is, at the inlet region 45, an opening 47 adjoins, the clear width d is significantly smaller than the clear width D of the yarn guide device 36th
The thread guide insert 39 is, for example, as in FIGS Figures 3 - 6 indicated, made directly from a wear-resistant material, preferably steel, and then has on its the inlet side 45 opposite rear ferromagnetic projections 35 which correspond with permanent magnets 42 which are defined in receiving holes 41 in the thread guide means 36. That is, the ferromagnetic projections 35 on the thread guide insert 39 form a magnet holder 31 with permanent magnets 42 on the thread guide device 36.

According to the FIGS. 7, 8 the thread guiding insert 39 consists of a base body 43 and a thread inlet part 44 fixed permanently on the base body 43.
The base body 43 is formed for example as a spray or diecast part and consists for example of aluminum or a plastic, while the thread inlet part 44 is made of a highly wear-resistant material, for example, a technical ceramic material.
Also in this case, the fixing of the thread guide insert 39 to the thread guide device 36 by means of a magnetic holder 31.

As in the FIGS. 11 and 12 indicated, the eye-like opening 47 in the yarn guide insert 39 may have both a circular and a polygonal shape.
In addition, as in FIG. 12 indicated, 46 notches 49 or the like may be provided in the region of the inlet surface, which influence the thread during its rotation.

The inventive Abspulhilfseinrichtung 23 with a replaceable thread guide insert 39 on the input side of a thread guide device 36 can be ensured that the winding process is thread-saving and high winding speed feasible.

Claims (13)

1. Winding head (2) of a textile machine (1) producing cross-wound bobbins (11), comprising an auxiliary unwinding device (23), which has a stationary, tubular thread guiding device (36), which is installed above a spinning cop (9) in the unwinding position (10), characterised in that the thread guiding device (36) has a thread guiding insert (39) which is arranged so as to be exchangeable on the input side.
2. Winding head according to claim 1, characterised in that the thread guiding insert (39) can be fixed non-positively and easily detachably onto the thread guiding device (36) by means of a magnetic holder (31).
3. Winding head according to claim 2, characterised in that the magnetic holder (31) has ferromagnetic extensions (35), which correspond with permanent magnets (42) arranged in receiving bores (41).
4. Winding head according to claim 1, characterised in that the thread guiding insert (39) is manufactured from a wear-resistant material.
5. Winding head according to claim 4, characterised in that the thread guiding insert (39) consists of a base body (43) as well as a thread inlet part (44) that is non-detachably fixed to the base body (43), which thread inlet part is manufactured from a technical ceramic material.
6. Winding head according to one of the preceding claims, characterised in that the thread guiding insert (39) has an inner width (d), which corresponds to the inner width (D) of the thread guiding device (36).
7. Winding head according to any one of the preceding claims, characterised in that the thread guiding insert (39) has a funnel-shaped thread inlet region (45).
8. Winding head according to claim 7, characterised in that the thread inlet region (45) has an inlet face (46) which, viewed in longitudinal section, runs linearly.
9. Winding head according to claim 7, characterised in that the thread inlet region (45) has an inlet face (46) which, viewed in longitudinal section, is convexly arched.
10. Winding head according to claim 1, characterised in that the thread guiding insert (39) has an eyelet-like opening (47), the inner width (d) of which is smaller than the inner width (D) of the thread guiding device (36).
11. Winding head according to claim 10, characterised in that the eyelet-like opening (47) of the thread guiding insert (39) has a round cross-section.
12. Winding head according to claim 11, characterised in that the thread guiding insert (39) has a thread inlet region (45) with, viewed in longitudinal section, a convexly arched inlet face (46), whereby notches (49) are arranged in the thread inlet region (45).
13. Winding head according to claim 10, characterised in that the eyelet-like opening (47) of the thread guiding insert (39) has a polygonal cross-section.

Images