EP2994561B1 - Device for producing a fabric and fabric - Google Patents

Description

The invention relates to a device for producing a fabric, wherein in each case a weaving step by means of warp threads, a shed is formed, through which a weft thread can be passed and the weft thread by means of a reed in the direction of a fabric edge is pushed.

Weaving machines for the production of fabrics and such fabrics are known from the prior art. In weaving, at least two thread systems are crossed at right angles, where one thread system is the warp system and the other thread system is the shot system. Prestressed warp threads form a carrier in which successive weft threads are drawn from one edge of the fabric to the other through an entire weaving width, which is formed by means of the warp threads. By weaving fabrics such. As carpets, wallpaper, reinforcements, composite fabrics and other technical textiles, produced. Weaving machines are generally used for the industrial production of fabrics. The warp threads are guided from the rear of the loom forward, the weft threads are transported from one side to the other between the warp threads, the so-called shed. In a finished fabric, the warp threads are held together by means of the weft threads.

The US 1,280,461 A1 describes a device for producing a fabric with warp threads, which form a shed, and weft threads, which are introduced by means of a weft insertion device in the shed. Furthermore, a reed for stopping the weft threads in the direction of a fabric edge is provided. The weft insertion device is designed such that an angle for insertion of the weft thread and for striking it in a range of approximately 45 ° is adjustable. For this purpose, a guided in oblong holes screw is provided.

Another device for producing a fabric is known from FR 2 499 107 A1 known, wherein a weft insertion device is designed such that an angle to the entry of the weft thread and for striking the same is adjustable.

The invention has for its object to provide an improved over the prior art apparatus for producing a fabric.

The object is achieved with a device having the features specified in claim 1.

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

A device for producing a fabric provides that in each case a weaving step by means of warp threads a shed is formed, through which a weft thread can be passed and the weft thread is pushed by means of a reed in the direction of a fabric edge. In this case, a weft insertion device is provided, by means of which an angle of the entry of the weft thread and / or the impact of the same to the fabric edge in relation to the warp thread is variably adjustable. In this case, the weft insertion device for adjusting the angle to the entry of the weft thread on at least one adjustment, which is coupled to the reed.

By means of the device, the weft threads at a set angle, which is in particular smaller than 90 °, can be introduced to the warp threads in the tissue. Since the weft threads are arranged obliquely to the warp threads within the fabric, the weft threads advantageously form a reinforcement of the fabric.

For example, it is possible with the device to produce fabrics whose weft threads run obliquely within the fabric to the warp threads, so that process steps, especially for manufacturers in the rubber industry, as in known from the prior art right-angled arrangement of the two types of yarn to each other, are no longer required. For example, the process steps of the diagonal blank and the subsequent joining together of the cut fabric layers prior to vulcanization can be omitted.

Since it is not necessary in a fabric produced by means of the device to add tailored fabric layers to one another, there is no joint seam which can form a bump and / or joint in the fabric.

Another advantage of a fabric made by the device is the drapability of a composite fabric for mold making.

By means of the adjustment of the angle, in particular a stop angle of the reed, in relation to the warp threads adjustable, with which the weft thread slidable to the fabric edge, d. H. is beatable.

The adjustment and its angle to be set are adjustable according to the invention by means of an electric drive via a transmission. A respective instantaneous angle can preferably be displayed by means of a scale, wherein the adjusting unit is mounted centrally, so that a pivot point is arranged in the middle of the adjusting unit. Preferably, the adjusting unit and / or the weft insertion device is arranged on a rotary plate which is coupled to a ring gear, so that the adjusting unit and / or the weft insertion device for adjusting the angle to the weft insertion is rotatably mounted or is.

It is also conceivable that the adjusting unit itself is formed from the gear coupled to the electric drive.

Preferably, the adjustment unit is designed such that an angle between 40 ° and 90 ° of the reed in relation to the warp threads is adjustable. Thus, a fabric can be produced, the weft threads obliquely to the warp threads run, which advantageously form the weft threads the strength carrier of the fabric.

Particularly preferably, the adjusting unit comprises a holding device, which is displaceable in the direction of the course of the warp threads. This makes it possible in a particularly advantageous manner that the adjustment shifts according to the progress of the fabric produced, so that the weft threads over an entire length of the fabric at the set angle can be introduced.

Advantageously, the adjusting unit comprises two cylinder-piston units, which are coupled to one end of the reed. By means of the cylinder-piston units, the respective weft thread can be hit against the fabric edge, a piston for this purpose being movable outward by a predetermined distance from a cylinder fixedly arranged on the holding device.

In an advantageous embodiment, the cylinder-piston unit is pneumatically actuated, so that the piston moves by means of compressed air. As a result, exclusively compressed air is required for movement of the piston, so that such a cylinder-piston unit is a comparatively inexpensive functional component.

A further alternative or additional embodiment provides that the movement of the sley and its reed can be carried out by means of a gear. This can have a positive effect on the frequency of weft entries.

A further preferred embodiment of the device provides that the weft insertion device and / or the adjustment unit are or is displaceable in the direction of the course of the warp threads. Particularly advantageously, both the weft insertion device and the adjustment unit are displaceable, so that it is possible to use the weft insertion device and the adjustment unit position accordingly. As a result, the weft thread can be inserted into the shed and then be hit against the fabric edge by means of the reed coupled to the reel. Thus, it is possible to form a substantially homogeneous fabric with obliquely running weft threads.

In a particularly advantageous manner, the weft insertion device and / or the adjustment unit are or is connected to a control unit for controlling these. Accordingly, the production of the fabric by means of the device can be carried out substantially fully automated, whereby no staff deployment, for example, for positioning of the weft insertion device, is required.

Preferably, a detection unit is provided for positioning the adjustment unit relative to the fabric edge, wherein the detection unit is advantageously connected to the control unit, so that the positioning of the adjustment unit is automatically carried out on the basis of detected signals of the detection unit.

Embodiments of the invention are explained in more detail below with reference to drawings.

Figur 1

schematisch eine Verstelleinheit einer Vorrichtung zur Herstellung eines Gewebes und

Figur 2

schematisch eine Draufsicht auf die Vorrichtung zur Herstellung des Gewebes.

Show:

FIG. 1

schematically an adjustment of a device for producing a fabric and

FIG. 2

schematically a plan view of the apparatus for producing the tissue.

Corresponding parts are provided in all figures with the same reference numerals.

FIG. 1 shows an adjustment 1 of an in FIG. 2 shown device 2 for producing a fabric 3 with oblique weft threads 3.1.

Weaving machines for producing fabrics 3, which are formed from warp yarns 3.2 and weft yarns 3.1, are known from the prior art.

The warp threads 3.2 are stretched and fixed to the loom, wherein by means of the warp threads 3.2 in each weaving step, a shed is formed, in which a weft thread 3.1 can be introduced and from a fabric edge to the opposite edge of the fabric can be guided. In such a fabric 3, the weft threads 3.1 extend at right angles to the warp threads 3.2, which form a reinforcement of the fabric 3.

Such exported fabric 3 are diagonally cut in the rubber industry with a predetermined angle and then tailored as parallelograms fabric layers are then joined together, in particular by gluing. As a result, unwanted joints and / or bumps may arise, for example by means of such assembled fabric layers tires and tubes are made.

In order to reduce a number of process steps, in particular the diagonal cutting and joining, for example in the rubber industry, it is provided to introduce the weft threads 3.1 in a predetermined angle between 40 ° and 90 ° to the warp threads 3.2 in the shed. In addition, it is provided that the weft thread 3.1 introduced in each case with the predetermined angle also hits the fabric edge of the fabric 3 at this angle by means of a reed 5.

For this purpose, the device 2 for producing a fabric 3 has an in FIG. 2 Weft insertion device 4 shown in detail, which is connected to the adjustment unit 1.

The adjusting unit 1 is arranged above the warp threads 3.2 and has two cylinder-piston units 6, wherein in each case a cylinder-piston unit 6 is coupled to one end 5.1 of the reed 5. In particular, an exposed end of a piston 6.1 is coupled to the reed 5, wherein the cylinders 6.2 are attached to a retaining element not shown in detail. For example, a threaded rod for adjusting the position of the two cylinder-piston units 6 is arranged between the holding element and the respective cylinder-piston unit 6 to each other. By turning the threaded rod, the pistons 6.1 of the cylinder-piston units 6 move relative to the cylinder 6.2, which also moves the reed 5. The cylinder-piston units 6 are pneumatically, so by means of compressed air, operable.

Alternatively, the cylinder-piston unit 6 may also be actuated hydraulically, by a motor and / or in any other suitable manner.

By means of the holding element, to which the two cylinder-piston units 6 are fastened, an angle of the reed 5 with respect to the warp threads 3.2 is adjustable, so that the respective registered in the shed weft 3.1 by means of the reed 5 this angle corresponding to the Fabric edge is malleable. As described above, an angle between 40 ° and 90 ° is adjustable, so that the weft threads 3.1 are einwebbar obliquely into the fabric 3. The reed 5 is movable by means of the adjustment unit 1 such that the respective weft thread 3.1 can be hit securely against the fabric edge independently of the set angle.

The pistons 6. 1 can be moved out of the cylinder 6. 2 and retracted, whereby the reed 5 exerts a forward and backward movement and strikes the weft thread 3.1 introduced in the respective weaving step against the fabric edge to form the fabric 3. The forward and backward movement of the reed 5 can be carried out in the direction of the course of the warp threads 3.2, so that the warp threads 3.2 are guided linearly.

A travel path of the pistons 6.1 for striking the weft threads 3.1 is for example 10 cm, so that the respective piston 6.1 can be moved out of the cylinder 6.2 by 10 cm. The two cylinder-piston units 6 are controllable via signals of a detection unit, not shown, in particular a proximity switch, which may be arranged on a secondary shaft of the device 2.

The holding element, to which the cylinders 6.2 of the cylinder-piston units 6 are fastened, is displaceably arranged on the device 2, so that the adjusting unit 1 can be positioned according to the length of the fabric 3. In this case, the adjustment unit 1 is connected to a control unit, not shown, and controlled by means of this, so that the positioning of the adjustment unit 1 takes place automatically.

In a preferred embodiment, the reed 5 is connected to a so-called batten, which is part of the weft insertion device 4, as in FIG. 2 is shown. In particular, the weft insertion device 4 is designed as a so-called gripper device.

The gripper device has a donor gripping element 4.1 and a slave gripping element 4.2. At the encoder gripping element 4.1, the weft 3.1 is fixed to the entry in the shed and is guided by means of the encoder-gripping element 4.1 to the middle of the shed. There, a transfer of the weft thread 3.1 to the slave gripper element 4.2, by means of which the weft thread 3.1 to the fabric edge is feasible.

It is also possible that the weft insertion takes place by means of so-called Web contactors. This results in the advantage that a solid fabric edge can be formed on the fabric 3.

The sley and the reed 5 are formed as a component and by means of the adjusting unit 1 at a predetermined angle between 40 ° and 90 ° to the Warp threads 3.2 can be positioned. As a result, the weft thread 3.1 at this angle can be entered into the shed and batted by means of the reed 5 to the fabric edge.

In the FIG. 2 3 shows a warp thread system 7, the weft insertion device 4, on which a warp thread lifting device 8 is arranged, a fabric take-up 9, a goods stand 10 and a winding device 11 for winding up the finished fabric 3; Piston units 6 and the reed 5 are not shown.

By means of the warp thread 7 of the device 2, the warp threads 3.2 are provided stretched for the weaving process, wherein the warp threads 3.2 extend over a predetermined portion of the device 2.

The weft insertion device 4 can be controlled by means of the control unit and automatically positioned in dependence on the length of the fabric 3. As described above, the weft insertion device 4 has the warp thread lifting device 8, by means of which a predetermined number of warp threads 3.2 can be raised to form the shed for inserting a weft thread 3.1. In this case, the shed as well as the weft insertion device 4 extends obliquely to the warp threads 3.2.
In addition, the weft insertion device 4 is coupled to the adjusting unit 1, not shown, wherein the adjusting unit 1 is arranged parallel to the weft insertion device 4.

By means of the fabric take-off 9, the finished fabric 3 can be removed from the device 2 and supplied via the goods level 10 of the winding device 11 for winding up the fabric 3. The warp thread system 7 and the fabric take-off 9 are firmly positioned and communicatively connected with each other, so that it is possible to weave the fabric 3 with a predetermined weft thread density and warp tension.

The winding device 11 may be designed, for example, as a vertical drum winder or as a center winder, wherein the winding device 11 is arranged parallel to the fabric take-off 9.

To set the angle at which the weft threads 3.1 with respect to the warp threads 3.2 in the shed can be introduced and batted to the fabric edge, the weft insertion device 4 with the warp thread lifting device 8 and the adjustment 1 between 40 ° and 90 ° to the warp threads 3.2 is adjustable.

The adjustment of the angle is preferably carried out automatically by means of the control unit.

LIST OF REFERENCE NUMBERS

1

adjustment

2

contraption

3

tissue

3.1

weft

3.2

warp

4

Weft insertion device

4.1

Encoder gripping element

4.2

Taker gripper

5

reed

5.1

The End

6

Cylinder-piston unit

6.1

piston

6.2

cylinder

7

warp

8th

Kettfadenhebevorrichtung

9

Fabric take

10

goods stand

11

winder

Claims (8)

1. Device (2) for producing a woven fabric (3), wherein in each weaving step a weaving shed through which a weft thread (3.1) is insertable is configurable by means of warp threads (3.2), and the weft thread (3.1) is displaceable in the direction of a woven-fabric periphery by means of a weaving reed (5), wherein a weft-insertion device (4) by means of which an angle for insertion of a weft thread (3.1) and/or for beating the latter up against the woven-fabric periphery in relation to the warp thread (3.2) is variably adjustable is provided, wherein the weft-insertion device (4) for adjusting the angle for insertion of the weft thread (3.1) has at least one readjustment unit (1) which is linked to the weaving reed (5), characterized in that the readjustment unit (1) and the angle to be adjusted therewith are adjustable by means of an electric drive by way of a gear unit.
2. Device (2) according to Claim 1, characterized in that an angle of the weaving reed (5) in relation to the warp threads (3.2) is adjustable by means of the readjustment unit (1) so as to be between 40° and 90°.
3. Device (2) according to Claim 1 or 2, characterized in that the readjustment unit (1) comprises a retaining device which is displaceable in the direction of the progression of the warp threads (3.2).
4. Device (2) according to one of the preceding claims, characterized in that the readjustment unit (1) comprises two cylinder-and-piston units (6) which are in each case linked to one end (5.1) of the weaving reed (5).
5. Device (2) according to Claim 4, characterized in that the cylinder-and-piston unit (6) is pneumatically activated.
6. Device (2) according to one of the preceding claims, characterized in that the weft-insertion device (4) and/or the readjustment unit (1) are/is displaceable in the direction of the progression of the warp threads (3.2).
7. Device (2) according to one of the preceding claims, characterized in that the weft-insertion device (4) and/or the readjustment unit (1) are/is connected to a control unit for actuation thereof.
8. Device (2) according to one of the preceding claims, characterized in that a detection unit for positioning at least the readjustment unit (1) in relation to the woven-fabric periphery is provided.

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