EP0333781A1

EP0333781A1 - Weaving machine

Info

Publication number: EP0333781A1
Application number: EP88907135A
Authority: EP
Inventors: Francisco Speich
Original assignee: Textilma AG
Current assignee: Textilma AG
Priority date: 1987-09-21
Filing date: 1988-08-12
Publication date: 1989-09-27
Anticipated expiration: 2008-08-12
Also published as: JP2631734B2; US5115839A; JPH02501229A; HK91093A; EP0333781B1; WO1989002491A1; ES2010368A6; DE3872699D1

Abstract

Die Webmaschine enthält eine Führungsvorrichtung (12b) für eine Gewebebahn (10), eine zwischen der Führungsvorrichtung (12b) und einem Brustbaum (40) angeordnete Schneidvorrichtung (18) und eine folgende Fixiervorrichtung (16a), wobei alle Aggregate unabhängig voneinander an der Webmaschine angeordnet sind. Durch die unabhängige Anordnung wird die Zugänglichkeit der einzelnen Aggregate für Einstell- und Reparaturarbeiten wesentlich verbessert und es ist ein Einstellen der Schneidköpfe (20) der Schneidvorrichtung (18) in Kettenrichtung möglich. Dadurch kann das Schneiden mit einem Musterrapport synchronisiert werden. Trotzdem bleibt eine gute Führung der Gewebebahn für mustergenaues Schneiden gewährleistet. Abstract A weaving machine comprises a guide device (12b) for a cloth run (10), a cutting device (18) arranged between the guide device (12b) and a breast beam (40), followed by a fixation device (18). All aggregates are independently mounted on the weaving machine. Independent mounting greatly facilitates access to the individual aggregates for adjustment and repair purposes and the cutting heads (20) of the cutting device (18) can be adjusted in the warp direction. Cutting can thereby be synchronized with a pattern repeat. The cloth run is nevertheless carefully guided to ensure accurate cutting according to pattern.The weaving machine contains a guiding device (12b) for a fabric web (10), a cutting device (18) arranged between the guiding device (12b) and a breast beam (40) and a subsequent fixing device (16a), all units being arranged independently of one another on the weaving machine are. The independent arrangement considerably improves the accessibility of the individual units for setting and repair work, and it is possible to set the cutting heads (20) of the cutting device (18) in the chain direction. This allows the cutting to be synchronized with a pattern repeat. Nevertheless, good guidance of the fabric web for pattern-accurate cutting remains guaranteed. Abstract A weaving machine comprises a guide device (12b) for a cloth run (10), a cutting device (18) arranged between the guide device (12b) and a breast beam (40), followed by a fixation device (18). All aggregates are independently mounted on the weaving machine. Independent mounting greatly facilitates access to the individual aggregates for adjustment and repair purposes and the cutting heads (20) of the cutting device (18) can be adjusted in the warp direction. Cutting can thereby be synchronized with a pattern repeat. The cloth run is nevertheless carefully guided to ensure accurate cutting according to pattern.

Description

Weaving machine

The invention relates to a weaving machine according to the preamble of claim 1.

It has long been known (DE-OS 1 535 330, US Pat. No. 3,486,957, Textile Practice 1956, September, p. 951) to produce tapes, in particular label tapes, not on conventional ribbon looms but on relatively wide weaving machines , because the production costs can be reduced so far that one can compete with the printed labels used for cheap textiles.

Theoretically, the manufacture prepares tissue kettfadenparalleles bands by cutting a corresponding wide fabric web ^'no difficulties. In practice, however, the bands left because of caused by different warp tensions Krumpfens and because of verkrus¬ ended band ^'t racing edge no quality merchandise in a Arbeits¬ gang economically reach.

In order to overcome these disadvantages, an arrangement is described in DE-PS 2 302 949 and US Pat. No. 3,961,650, which sees the solution in that all known devices, ie a spreader, are a cutting device and a thermal fixation device can be integrated into a compact, specially designed, compact support beam that extends over the entire width of the fabric. A very compact design is thus achieved, but it does not eliminate the above-mentioned disadvantages, since the individual devices rigidly arranged and their positions are not adjustable against each other. The compact design makes access and operation difficult and is also susceptible to dirt due to the round bar of a clamping spreader inserted in a narrow, almost closed groove, since the fabric web is pulled through this groove and clamped at the entry and exit slots and this removes fluff and winds up loose threads. Another significant disadvantage is that the disadvantageous shrinkage behavior and the encrusted strip separating edges cannot be eliminated with a heating wire arranged on one side above or below the strips. For reasons of space, the compact design does not permit any other solution, which means that the disadvantages mentioned have not yet been eliminated with this solution and the strip quality required by the market cannot yet be achieved.

Furthermore, a device is known from US-PS 4 1 4 420 which cuts a wide fabric into ribbons. However, the device is an independent unit, which is modeled on a breast tree of a weaving machine and consists of a multiplicity of deflection rollers and a dancer device for maintaining a constant belt tension and belt speed on the cutting device. This device has the disadvantage that the long path of the fabric web impairs the guidance, so that an exact pattern-accurate separation of the fabric web into individual tapes is not guaranteed.

The object of the invention is to improve a loom of the type mentioned. The object is achieved according to the invention by the characterizing features of claim 1. The fact that the guide device and the cutting device are arranged separately from one another on the weaving machine, that is to say that they are not located on a common carrier, improves their accessibility considerably, so that they are more easily accessible in the event of malfunctions and adjustment work. In addition, these individual devices can be individually optimally configured due to their detached arrangement, for example on the machine frame. Nevertheless, due to the close arrangement of the cutting device on the guide device and thus on the weft thread edge, optimal guidance of the fabric web and thus pattern-accurate cutting is achieved. The fixation device connected downstream of the breast tree enables optimal fixation conditions, the guidance of the individual ligaments no longer being critical.

Advantageous embodiments of the weaving machine are described in claims 2 to 22.

As a guide device, the weaving machine can have a deflecting rod system according to claim 15, but a hold-down device according to claim 2 is more advantageous.

Because the fabric web is only S-shaped around two guide edges by two guide strips, the resistance of the fabric web in the guide device is relatively low, so that the fabric web can be guided through the guide device in both directions. This results in a particularly simple construction of the guide device is practically not susceptible to dust and is easily accessible for maintenance and adjustment work. Nevertheless, the S-shaped guidance of the fabric web offers sufficient hold-down and guidance of the fabric web on the weft thread flange edge and a smooth, smooth guidance for the cutting process, so that optimal manufacturing conditions are provided for the fabric web or the tapes are.

The embodiment according to claim 3 enables a good adaptation of the guide bar to the fabric web and the embodiment according to claim 4 enables a particularly subtle adjustment of the guide device, in particular to the type of fabric web to be produced, for example its thickness.

Particularly good guiding properties are achieved with an embodiment of the guiding device according to claim 5. In principle, the first guiding strip can be arranged in such a way that the fabric web lies against this guiding strip from below, so that the groove-shaped recess and the second guiding strip then lie above the first guide strip it is more advantageous, however, if the fabric web rests on the first guide bar and is guided downward into the groove-shaped recess, into which the second guide bar ^" pointing counter to the direction of travel of the fabric web also engages. Adapting the second guide bar with its second leading edge on the type of fabric web and the production conditions can be improved by a configuration according to claim 6 or 7. The configuration according to claim 8 also has the same effect, whereby any jamming of the fabric web on the guide device is adjustable .

An embodiment according to claim 9 is particularly expedient, since the fabric web produced can then be subjected to a first fixation by means of the heating device. An embodiment according to claim 10 and / or 11 can be expedient in order to bring the tissue into a desired shape. In this case, a heating device provided on the leading edge and / or on the spreader bar can enable the aligned fabric web to be fixed. The alignment of the fabric web on the spreader bar can be further promoted by the known design according to claim 12. It is also possible for the spreader bar to be arranged in a fixed manner. But also a ange¬ exaggerated Off ^'gesta Itungnach claim 14 is possible.

A design of the cutting device according to claim 16 is particularly advantageous. The adjusting device makes it possible to adapt the cutting process to the weaving process, ie to the repeat length of a weaving pattern in the fabric web. So the Webge¬ example speed in label weaving and therefore the take-off speed ^• during weaving the pattern slower than in the area between the patterns. The adjusting device now makes it possible to set the cutting heads along the fabric web in such a position that they always cut an unpatterned area when the weaving speed and thus also the take-off speed is greater than in the patterned area.

Particularly advantageous is a fixing device according to claim 17, which enables the strips produced to be properly fixed without substantial changes in shape. The fact that the belts rest on the rough surface of the roller prevents warping of the belts in the longitudinal and transverse directions. Maintaining the form Faithfulness is supported by the installation of the heating shoe. The rough surface of the roller can be achieved, for example, by adhering granular material, such as corundum powder, metal powder and the like. A design according to Aasprrαch 18 is particularly advantageous, since the sprayed-on and melted-on metal puLv.er forms an intimate connection with the surface and. is therefore not influenced by the heating caused by the heating shoe. Particularly good results are obtained with a configuration according to claims 19 and / or 20. Training according to claim 22 is also particularly expedient.

An embodiment according to claim 22 is particularly advantageous, since the preheated roller facilitates fixation, in particular in the case of tendon 11 runners.

Exemplary embodiments of the weaving machine according to the invention are described in more detail below with the aid of schematic drawings, in which:

Figure 1 shows a first loom in side view of the fabric web guide.

2 shows a second weaving machine in a side view of the fabric web guide;

Fig. 3 shows a first guide device for the

Weaving machine of FIGS. 2 and Fig., A second guide device for the weaving machine of Fig. 2nd

Figures 1 and 2 show a schematic representation of the parts of the weaving machine essential for the present invention. All other parts are state of the art and well known. The shed (4) formed from warp threads (2) is shown, into which a weft thread (5) is inserted in a manner not shown and attached to the stop edge (8) of the fabric web (10) by means of a reed (6) becomes. The fabric web (10) first passes through a guide device (12a or 12b) which extends over the fabric web (10). From the guide device (12a, 12b) the fabric web (10) reaches the take-off device (14a, 14b) with a fixing device (16a,. 16b), which is preceded by a cutting device (18). The guide device (12a, 12b), the cutting device (18) and the fixing device (16a, 16b) are arranged independently and at a distance from one another on the frame of the weaving machine.

The cutting device (18) is again designed in a known manner and contains various cutting heads (20) with cutting elements (22) which are individually set transversely to the fabric web in accordance with the desired width of the strips to be produced. The cutting heads can have electrically heated cutting wires or cutting blades. Cutting heads with ultrasonic cutting elements or laser cutting elements are also possible. In any case, the cutting elements are designed in such a way that they do not only cut the fabric web, ie practically cut them through enable the weft threads between two warp threads, but at the same time also ensure that the cutting edges melt open. For this purpose, the fabric web consists at least partially of thermoplastic yarns. To synchronize the cutting process with a pattern repeat, the cutting heads (20) are connected to a support (28) via adjusting spindles (26) and can thus be adjusted in their position in the direction of the warp threads, ie in the running direction of the fabric web. This makes it possible to synchronize the cutting process with the pattern repeat of the fabric web.

In the weaving machine of FIG. 1, the guide device (12a) is designed as a deflecting rod system, the fabric web (10) being guided around three fixed rods (32, 34, 36) connected to the machine frame (30). At least one rod can be rotated and at least one rod can be designed to be heatable in order to enable the fabric web to be pre-fixed.

The take-off device (14a) of the weaving machine in FIG. 1 also contains, as mentioned, the fixing device ⁽ 12a) for the tapes produced. For this purpose, the take-off roller (38) is provided with a roughened surface which is formed, for example, by sprayed and melted metal powder. The individual belts are brought to bear on the take-off roller (38) by means of the guide roller serving as the breast beam (40) and the outlet-side guide roller (42) which determine the run-up and the drainage lines. A heating shoe (44) which can be set against the removal roller (38) interacts with the removal roller (38), which also extends over the fabric web, between the run-up and the outlet point of the cut fabric web, preferably at half the wrap angle L (not shown ^{) of} the fabric web and one of the circumferential surface of the take-off roller (38) Has contact surface (46). This heating shoe (44) is elastically connected to a feed element (50) by means of springs (48), so that the heating shoe (44) is optimally fitted to the belts to be fixed on the take-off roller. The feed member (50) is connected to a setting device (52). The heating shoe (44) can in turn be equipped with an electrical resistance heater as well as with sensors and controllers for setting the necessary fi xer temperature, which is preferably at least 130 ° C. The adjusting device (52) can also be connected to a control unit in order to be able to set the pretensioning force of the heating shoe (44).

The loom of FIG. 2 differs from the loom of FIG. 1 in that the guide device ⁽ 12b) is designed as a hold-down device, which is explained in more detail in FIGS. 3 and 4 below. In addition, the fabric web is guided after the cutting device (18) and before the take-off device (14b) over a breast tree (54) designed as a plate, which takes over the function of the breast tree (40) of FIG. 1. The take-off roller (38a) can preferably be heated to a temperature <100 ° C. in order to preheat the belts to be fixed in order to accelerate the fixing to the fixing device (16b). The latter is expediently designed analogously to the fixing device (16a) of FIG. 1 and heated to a temperature> 130 C. The fixing device (16a) can act on the draw-off roller (38a) as in FIG. 1 or on the downstream guide roller (42) as in the example shown. 3 shows a first guiding device (12b), designed as a hold-down device, at the weaving machine's weaving machine. The warp threads (2) are guided by means of a shed device, not shown, in such a way that the open shed (4) is formed, through which the weft thread (5) is inserted and by means of the reed C6) on the stop edge ( 8) the tissue web (10) is struck. The guide device (12b) contains a first guide bar (56), on the top of which the fabric web (10) rests. The guide strip has a guide edge (60) which points in the running direction (58) of the fabric web (10) and via which the fabric web is guided into an underlying groove-like recess (62). The rounded guide edge (6 ^' 4) of a second guide bar (66) serves for this purpose, which guides the fabric web (10) into the recess (62). introduces, so that the fabric web is S-shaped. After the second leading edge (64), the fabric web (10) over a

Spreader rod (68) transported further. The spreader bar (68) is located under the second guide bar (66) and is preferably provided in a known manner (not shown in more detail) on one half with a right-hand thread and on the other half with a left-hand thread, around the fabric web in the direction transverse to the web to stretch. Corresponding thread grooves can also be present on the first and / or second guide edge (60, 64). The spreader bar (68) can be arranged to be stationary, as in the example shown, or driven, in which case the peripheral speed must be greater than the production speed of the fabric web. A reverse drive is also possible. In the present example, however, the spreader bar (68) is stationary and fastened by means of a screw (70) to a carrier (72) which also carries the first guide bar (56). The second guide bar (66) is pivotably mounted on the spreader rod (68), the axis (74) of the spreader rod, which also the Forms pivot axis of the second guide bar (66), is parallel to the guide edge (60) or (64). The second guide strip (66) is inclined at an acute angle (oL) to the plane ⁽ 76) of the fabric web (10) on the stop edge (8), as a result of which the fabric web (10) is clamped between the guide edges (60, 64) the first guide bar (56) and the second guide bar (66) are adjustable when the fabric web is pulled off.

The second guide bar (66) contains, at least in the area of the guide edge (64), a heating device (78) for fixing the fabric web, ie for stabilizing the weft and / or warp threads. The heating effect can continue up to the spreader bar (68) and be supported by an insulating cover (80 ⁾ over the second guide bar (66). The spreader bar can also be heated for certain conditions.

The guide device (12b) shown in FIG. 4 corresponds to that of FIG. 3, so that identical parts are provided with the same reference numerals. In contrast to the guide device of FIG. 3, in the case of that of FIG. 4 the second guide bar (66a) is arranged on supports (82) which are connected to the carrier (72). The supports also carry the spreader bar (68). The guide bar (66a) is adjustably guided on the supports (82) in the running direction (58) of the fabric web by means of adjusting screws (68), so that the overlap depth of the guide bars (66a, 60) engaging one behind the other can be adjusted. The guide strip can be locked in the respectively overlapping depth (x) by means of the fixing screw (86). The second guide edge (64a) is fastened to the second guide bar (66) by means of a resilient holder (88), so that the second guide edge (64a) can be pivoted about an axis (74a) given by the clamping point (90). Reference characters

CL angle x overlap depth

2 warp threads

4 shed

5 weft

6 reed

8 stop edge

10 fabric web

12a Management device

12b guide device

14a deduction device

14b deduction device

16a Fixing device

16b fixing device

18 Cutting device

20 cutting head

22 cutting element

24 adjusting device

26 spindle

28 support

30 machine gestures L l

32 rod

34 rod

36 rod

38 trigger roller

38a trigger roller

40 guide roller (breast beam) Guideway Ize Hei zschuh contact flat springs

Actuator actuator plate (breast tree

1. Guide bar running direction of 10 leading edge of 56 recess

Leading edge of 66 a Leading edge of 66a

2. Guide bar a Guide bar spreader rod screw

carrier

Axis a axis

level

Insulating cover

In stock

First rob

Fi x i shock resilient holder

Clamping point

Claims

1) Loom, with a guide device (12a, 12b) for the fabric web (10) arranged downstream of the weft thread lay-up edge (8), with a cutting device (18) arranged between the guide device and a breast beam (40, 54) for cutting a web of fabric (10) consisting at least partially of thermoplastic yarns into strips and for melting the cut edges to perfection as well as with a thermal fixing device (16a, 16b), characterized in that the guide device (12a, 12b) and the cutting device (18) are each arranged independently of one another and that the fixing device (16a, 16b) is arranged on a take-off roller (38, 38a and / or an immediately following guide roller (42) arranged after the breast beam (40, 54) .

2) Weaving machine according to claim 1, characterized in that the guide device (12b) has a guide bar (56) with a guide edge (60) which extends over the width of the fabric web (10) and is arranged downstream of the weft thread stop edge (8) and has a second guide edge (60) Guide strip (66, 66a) with a guide edge (64, 64a) is assigned such that it can be removed behind one another in such a way that the fabric web (10) can be guided in an S-shape around the guide strips (56, 66, 66a).

3 ⁾ Weaving machine according to claim 2, characterized in that the second guide bar (66, 66a) is formed from individual segments which cover part of the fabric width

P-281 8

T h e r m i s c h e s S c h ne i d en

1 1. 08. 1 988 / ws 4) Weaving machine according to claim 2 or 3, characterized in that the overlap depth (x) of the mutually engaging guide strips (56, 66a) is adjustable.

5) loom according to one of claims 2 to 4, characterized ge indicates that above or preferably below the first in the running direction (58) of the fabric web (10) facing guide bar (56) has a groove-shaped recess (62) is present into which the second guide bar (66, 66a), which points counter to the running direction (58) of the fabric web (10), engages.

6) loom according to one of claims 2 to 5, characterized ge indicates that the second guide edge (64) is pivotable about an axis parallel to the first guide edge (60) (74). .

7) Loom according to claim 6, characterized in that the second guide edge (64a) is arranged on the guide bar (66a) by means of a resilient holder (88).

8) loom according to one of claims 2 to 7, characterized ge indicates that the guide bar (66, 66a) is inclined at an acute angle (o () to the plane (76) of the fabric web (10) on the weft thread stop edge (8) .

9) Loom according to one of claims 2 to 8, characterized in that the second guide bar (66, 66a) preferably has a heating device (78) in the region of the guide edge (64, 64a). 10) loom according to one of claims 2 to 9, characterized ge indicates that the first and / or second guide edge (s) C60, 64, 64a) are / is designed as a spreading device, wherein it has grooves on the deflecting surface points, which stretch the fabric web (10) in width direction.

11) Weaving machine according to one of claims 2 to 10, characterized chnet that the leading edge (64, 64a) of the guide rail (66, 66a) to be ile is followed by a spreader, especially a spreader bar (68).

12) Loom according to claim 11, characterized in that the spreader bar (68) has a right-hand thread on one half and a left-hand thread on the other half.

»

13) weaving machine according to claim 11 or 12, characterized gekennzeich¬ net that the spreader bar (68) i fixed.

14-) W.ebπiaschine according to claim 11 or 12, characterized gekennzeich¬ net, - that the spreader bar (68) rotatably arranged and v.orzxιgswei se drivable with a peripheral speed vst which is greater than the speed of the goods fcxah-rr (10 ).

15!) Weaving machine according to claim 1, characterized in that the guide device (12) is designed as a deflecting rod system, preferably three rods (32, '34, 36) connected to the machine frame (30) being provided, and that at least one rod is rotatable and that preferably at least one rod can be heated. To allow 16) Weaving machine according to any one of claims 1 to 15, characterized in that the cutting device (18) cutting ^¬ heads (20) which are arranged on an adjusting device (24) to a position adjustment in the warp direction of the fabric web (10) .

17) loom according to one of claims 1 to 16, characterized in that the roller of the fixing device (16a, 16b) is provided with a rough surface on which the cut fabric web (10) rests, a heating shoe (44) against the roller (38, 38a, 42) can be fed.

18) Loom according to claim 17, characterized in that the roller (38, 38a, 42) has a rough surface formed by spraying and melting metal powder.

19) Loom according to claim 17, characterized in that the heating shoe (44) has a contact surface (46) which is adapted to the circumferential surface of the roller (38, 38a, 42).

20) Loom according to claim 17, characterized in that the heating shoe (44) is arranged elastically on an adjusting member (50 ⁾ .

21) loom according to claim 17, characterized in that the heating shoe (44) between the Auflaufste l le and the outlet of the cut fabric web (10) on the roller (38, 38a, 42), preferably near the drainage, arranged is. 22) Loom according to one of claims 17 to 21, characterized in that the roller (38) can be heated to a temperature, preferably less than 100 C, which is lower than the temperature of the heating shoe (44), which is preferably at least 130 C. st.