EP3374302A1

EP3374302A1 - Method and device for producing and withdrawing a web-like product

Info

Publication number: EP3374302A1
Application number: EP16797767.7A
Authority: EP
Inventors: Martin VEIL
Original assignee: Lindauer Dornier GmbH
Current assignee: Lindauer Dornier GmbH
Priority date: 2015-11-10
Filing date: 2016-11-03
Publication date: 2018-09-19
Anticipated expiration: 2036-11-03
Also published as: DE102015222142B3; CN108349674B; JP6833847B2; US20180313007A1; CN108349674A; CA3003214A1; TW201725293A; WO2017080896A1; JP2018535165A; US10487425B2; EP3374302B1; RU2018119080A; KR20180081112A; AU2016352556A1

Abstract

The invention relates to a method and device for producing and withdrawing a web-like product (2) using a production machine (1) and two clamp carriers (7.1, 7.2) with clamps (10.1, 10.2). The clamp carriers (7.1, 7.2) are driven back and forth parallel to a withdrawal direction of the web-like product (2). The clamp carriers (7.1, 7.2) can each be driven using a pair of drive spindles (14.1, 14.2) which are arranged in such a way that the web center of the web-like product (2) runs within the device (6) in an area between the two drive spindles (14.1, 14.2) of the respective clamp carriers (7.1, 7.2). The method is characterized in that the web-like product (2) is produced with successive main sections (4.1, 4.2, 4.3, 4.4) and auxiliary sections (3.1, 3.2, 3.3, 3.4, 3.5), and the clamps (10) are controlled in such a way that the opening and closing of the clamps (10) only takes place in the periods of production in which an auxiliary section (3.1, 3.2, 3.3, 3.4, 3.5) of the web-like product (2) is produced.

Description

Method and device for production and withdrawal of a

sheet-shaped product

Technical area

The present invention relates to a method and an apparatus for the production and withdrawal of a web-shaped product.

State of the art

In the prior art methods and devices are known with which elongated and web-shaped products produced continuously and

then be withdrawn directly from the production machine or from a supply roll to supply them to a further processing process.

Such a method and apparatus is shown, for example, in US Pat. No. 2,990,091. This concerns the impregnation of fibers for the production of an elongated fiber-reinforced plastic material. The fibers are drawn off from the supply rolls at a constant speed while being held under tension. In the tensioned state, the fibers pass through further processing stations. To pull off and hold the tension is a device with two terminal supports with terminals for the deducted

Plastic material. In the device frame are guide bolts for the

Terminal carrier available on which the terminal support are slidably guided in the withdrawal direction. Furthermore, a cam mechanism is provided, through which the terminal carrier reciprocating in a shift range are driven. The terminal carriers are not independently drivable. The displacement is not adjustable and can not be very long due to the structure. It is therefore difficult to adapt to changed product properties or to changed processes. The

Guide pins are clamped only at their ends in the device frame, so that at high tensile forces and long displacement paths deflections of the guide pins may occur.

US 3,556,888 describes a similar method to US 2,990,091. For pulling off a device is used in which several hydraulically driven Terminal segments are arranged distributed over the width of the product. The terminal carriers are guided and powered at the bottom with respect to the device frame. For the feed in the withdrawal direction is a

Continuously running drive chain, to which the terminal carriers are connected or disconnected via a pawl. The force application point of the drive chain and the

Guideway of the terminal support in the device frame are far away from the plane in which the tension in the product to be withdrawn is built up. As a result, there is the risk of deformation and / or tension at high pull-off voltages. A high precision of the alternating movement of the two terminal carrier is hardly achievable.

US 3,819,073 discloses an apparatus for withdrawing pipes or cables from a production machine. The drive of the terminal carrier via a common drive spindle, which is driven by a single motor. The force application point of the drive spindle to the terminal supports is located below the plane in which the tension is applied to the product to be deducted. For alternating feed and return transport of the

Terminal support these are powered by a gearbox with the auxiliary motor

Drive spindle connected in different ways. Parallel to the drive spindle, a further spindle is provided on which a plurality of mechanical stops are mounted, which are used for actuating limit switches for the movement movements of the terminal carrier.

US 4,478,360 discloses a stripper for belt-like material having two terminal carriers disposed on both longitudinal sides of the belt-like material. The associated clamps take alternately from one of the two longitudinal sides of the edge of the band-like material. For a precise trigger with high tensile stresses, such an asymmetrical arrangement is not suitable.

The object of the present invention is to provide a method and a device with which a strip-like material can be produced and stripped, which requires in its production a high constant tension and high precision of the withdrawal movement in relation to the production machine. Description of the invention

The object is achieved by a method and a device according to the

solved independent claims.

It is proposed in the context of the present invention, a method for producing a sheet-like product with a production machine, wherein the sheet-like product is held under a tensile stress during production. The tensile stress is generated at the output of the production machine by a device with which the web-shaped product also from the

Production machine is deducted. The device for stripping works with two terminal supports with clamps for the web-shaped product, as well as with drive means by which the terminal supports are driven back and forth parallel to a withdrawal direction of the web-shaped product. The procedure contains the following features:

- producing a web-shaped product with the production machine;

- Pulling the web-shaped product by a defined, alternately reciprocating movement of the terminal support in the withdrawal direction or against the withdrawal direction. In this case, the terminals are defined opened and closed via corresponding terminal controls such that always one of the two terminals is closed, whereby the ribbon-like material is connected to the respective terminal carrier;

- When closed, at least one of the two terminals becomes

by driving the drive means of the associated terminal carrier a

Tensile applied to the web-shaped product.

The proposed method according to the invention is characterized in that the web-shaped product with successive main sections and

Auxiliary sections is produced, the terminals are controlled such that the opening and closing of the terminals takes place only in the periods of production in which an auxiliary portion of the web-shaped product is produced. In one embodiment of the method, the terminals are also controlled such that when removing only already produced auxiliary sections of the sheet-like product are detected by the terminals.

This is to ensure that the main sections of the strip-like material are free of damage by the detection of the terminals.

For applying the tension on the web-shaped product, it is advantageous if the drive means of the terminal carrier are controlled in dependence on the predetermined tensile stress. The tension can be measured for this purpose, for example, with strain gauges at appropriate locations of the terminals or the terminal support.

However, it is particularly advantageous if the drive means are designed as drive motors with drive spindles, wherein the drive spindles drive the terminal carriers in the withdrawal direction or in the direction of the tensile stress. In this case, the torque of the drive motors via the electrical control of the drive motors can be measured and - after appropriate conversion - be used for traction-dependent control of the drive motors. The inventive method can be particularly advantageous in the

Production of certain - mostly technical - fabric using a loom.

For such fabrics, it is usually sufficient if it has successive main sections of limited length, in which these main sections certain tissue properties must be present. During fabrication or further processing of these tissues, only these major sections of the tissue are used. It is therefore possible to weave auxiliary sections between the main sections which accumulate as waste during assembly. The process according to the invention is particularly advantageous in the production of multi-layered fabrics. These fabrics can be very thick - for example in the range 5 mm - 80 mm - but even greater thicknesses are possible. If fibers are then used in weft and / or warp, which are very stiff - so little flexible, the finished fabric can be followed by the Web process no longer wind up in a classic way on a roll, but must essentially in the production direction - usually horizontally - of the

Weaving machine are deducted.

In these cases, the proposed method can then be used to produce the main sections of the sheet-like product, for example as a multi-layered fabric with a defined tensile stress and defined weft density, while producing auxiliary sections which do not have to have any particular tissue properties, but merely serve to provide the

Main sections to separate. The defined tensile stress in the area of the main sections can easily assume values of up to 20 KN in the case of multi-layer technical fabrics. Since such fabrics are often used in the field of fiber-reinforced plastics with high demands on the uniformity of the mechanical properties, a constant tension and, above all, a constant, defined weft density is especially important during the production of the main sections of the fabric. That means the

Discharge speed during the production of the main sections must be very constant. As a result, uniform, defined distances from a registered weft to the next registered weft

(= Shot density) achieved.

Due to the fact that according to the invention, the opening and closing of the terminals takes place during removal only in the periods of production in which the

Auxiliary sections are woven, only such fluctuations of the tensile stress and / or the weft density can occur there, which could occur unintentionally in the transfer of the tissue from one to the other terminal carrier. During the production of the main sections thus no such transfer takes place from one to the other terminal carrier.

With correct choice of the distances between the puller and the

Weaving machine and with appropriate setting and sequence of the displacement paths of the terminal support can be further achieved that the fabric web is detected during removal only at the auxiliary sections of the terminals. This helps to avoid damage to the fabric surface in the main sections. For the determination of the displacement path of the terminal support, the following geometric boundary conditions apply to the method presented here and to the device described below.

For producing a certain length of a complete piece of fabric with an auxiliary section and a main section becomes for the terminal carrier

Displacement required, which is as large as the entire length of the tissue to be woven piece. The displacement of the terminal support is defined as the distance between the two extreme positions of the terminals and the terminal support at the beginning and at the end of the device. In order for transfer from one clamp to another to occur while an auxiliary section of a subsequent piece of fabric is being produced, the distance between the loom exit and the beginning of the first terminal support clamp travel must not be greater than the length of a complete piece of fabric. Thus, to ensure the optimal transfer from one clamp to the other described above, the length of a complete piece of fabric must be within the displacement path while the auxiliary portion of a subsequent piece of fabric is being produced.

If, on the basis of the previously defined boundary condition, smaller pieces of tissue than those described above are also to be produced, the total displacement must be the distance between the two outermost positions of the clamps and the terminal support at the beginning and end of the device - be extended. It then results

Displacement of the two terminals or the two terminal support, which is greater than a complete length of the tissue to be woven piece, namely twice as large as the length of the smallest piece of tissue to be woven. At the same time the distance between the output of the loom and the beginning of the displacement path for the terminal of the first terminal support must be reduced to 1/2 of the above-defined displacement. In the context of the invention, a device for extracting a web-shaped product from a production machine with two terminal carriers with clamps for the web-shaped product is also proposed. The apparatus comprises a device frame to which guide means for the clamp supports are attached. Furthermore, drive means are present, through which the Terminal support parallel to a withdrawal direction of the web-shaped product in a displacement range back and forth driven drivable. The device according to the invention is characterized in that each of the two terminal carriers is drivable with a pair of drive spindles, wherein the drive spindles are arranged such that the web center of the web-shaped product extends within the device in an area between the two drive spindles of the respective terminal carrier. Thus, a uniform distribution of

Tensile of the sheet-like product achieved on the terminal carrier and the drive spindles.

Also favorable is a device in which the drive spindles and the web-shaped product extend in the same plane. Thus, the

Force on the spindles as short as possible without unnecessary

Deflections and largely avoiding deformations of the spindles.

Of course, an arrangement is also possible in which the drive spindles are arranged in a plane which runs parallel to the plane in which the web-shaped product runs. However, the aforementioned favorable force on the spindles is only guaranteed if the distance of one level to the other level is not too large - for example, less than three times the diameter of the drive spindles.

A uniform distribution of the tensile stresses or the driving forces of the spindles within the terminal carrier can be additionally achieved by arranging the drive spindles in the direction of the width of the sheet-like product symmetrically with respect to the center of the terminal carriers.

Another favorable embodiment of the device results when the

Drive spindles extend over the entire length of the displacement region, wherein each pair of drive spindles through which one of the two terminal carrier is driven, is mounted in the respective other terminal carrier.

By this arrangement, almost all of the available in the device

Movable travel for both terminal carriers. And even with long drive spindles - that is, long displacement - is a sagging or Swinging the drive spindles between the two end positions of the displacement reduced.

The setting and control of the sliding movement of the trigger should be adaptable to the properties of the web-shaped product with different length auxiliary sections and main sections. In addition, it may happen that the web-shaped product is not arranged symmetrically across the width within the device, but extends on one side. The

Web widths can be, for example, 50 cm to 150 cm.

For these reasons, it is advantageous if each of the drive spindles can be driven by its own drive motor. Thus, the displacement paths of each terminal support can be set independently of the other terminal support. In addition, an asymmetrical distribution of the tensile stresses on each of the two terminal carriers can be intercepted via an asymmetrical activation of the two associated drive motors.

For reasons of accessibility, it makes sense to arrange all the drive motors in the withdrawal direction of the web-shaped product at the end of the shift range.

In order to achieve the fewest and most symmetrical possible strains and deformations within the device, it is provided in a further embodiment of the device to perform the guide means as guideways, which are arranged symmetrically in the direction of the width of the product web to the center terminal support.

It is particularly advantageous if the guideways are supported over their entire length in the device frame.

In a further embodiment of the device are at one of the two

Klemmenträger two rollers for removing the web-shaped product attached by this terminal carrier. The nip is adjustable. At least one of the two rollers is driven by a motor. This ensures the automatic onward transport of the sheet-like product at the outlet of the device. The device according to the invention can be used in a particularly advantageous manner in conjunction with a weaving machine. This will be the

Implementation of the method described above, for example, in the production of multi-layer fabrics possible.

Brief description of the drawings

Figure 1 a-f Schematic representation of an embodiment of the

inventive method

Figure 2 Schematic representation of an embodiment of

Device according to the invention in side view Figure 3 Section A-A of the device according to Figure 2

Figure 4 Schematic representation of the device according to Figure 2 in top view Figures 1 a to 1f show successive steps of an embodiment of the method according to the invention.

The production machine - in the present case a weaving machine 1 - produces successive pieces 2.1, 2.2 of a multi-layered fabric. Each of the woven pieces 2.1, 2.2 consists of an auxiliary section 3 and a

Main section 4. The main section 4 is the basis for the final product to be produced. The auxiliary sections 3 are generally much shorter than the main sections 4; they merely serve to separate and handle the main sections 4. As a rule, different weave patterns are used for the two sections 3, 4 of a piece of fabric 2.1 or 2.2 to be produced. The switching between the two types of fabric or weave patterns for the two sections 3, 4 of a fabric piece 2.1, 2.2, etc. takes place automatically when the loom 1 is running. These weft insertion, shedding, warp and goods control in a familiar to the expert way of a electronic control cabinet from controlled. The various weave patterns are stored in the form of electronic pattern data in the loom control. The fabric pieces 2.1, 2.2 produced are most expediently removed from the weaving machine 1 in the horizontal direction. When starting a new production of the first fabric section 2.1 is usually taken by the operator and fed to the subsequent removal device 6, which from then on the other

Executes procedure sections automatically.

1 a shows that the weaving machine 1 has already produced a piece of fabric 2.1 with a first auxiliary section 3.1 and a first main section 4.1 and that at the moment a second auxiliary section 3.2 is produced which leaves the loom 1 at the outlet 5. The output 5 is the so-called binding point or edge of the fabric in the loom. 1 This is the point or line at which a registered weft yarn is struck by the already produced fabric web 2 by means of a reed and tied by warp threads which form a shed. These details of the loom 1 are known in the art and therefore need not be further illustrated here.

The already produced auxiliary section 3.1 is detected in a device 6 for removing the fabric web 2 by a clamp 10.1 and thereby connected to a first terminal support 7.1. The removal device 6 has two terminal supports 7.1, 7.2 with clamps 10.1, 10.2 for the fabric web 2.

Furthermore, drive means are present on the device 6, through which the

Terminal carrier 7.1, 7.2 parallel to a withdrawal direction of the fabric web 2 back and forth driven. Some details of the device 6 for stripping are not shown in Figures 1 a-1 f and are explained below.

After the detection of the auxiliary section 3.1 by the clamp 10.1 of the first terminal support 7.1, a tension in the withdrawal direction of the fabric web 2 is built up via the drive means of this terminal support 7.1 in the fabric section 2.1. This tension is passed on the weaving machine side over the warp threads to the warp thread supply - for example, a warp beam or a creel.

The withdrawal of the warp threads of this warp thread supply is via suitable Antriebsbzw. Controlled brake means. In the weaving machine 1 is usually a measuring device with which the tension in the warp threads - that is the Warp tension or the fabric tension - can be measured. The

Measuring device for measuring can of course also in the area between the

Be mounted terminal support 7.1, 7.2 of the device 6 for pulling and the loom 1. The measured tensile stress is passed on to the control devices for the drive or braking devices in the loom 1 and possibly also to the control means for the drive means of the terminal support 7.

FIG. 1 b shows that a second main section 4.2 has already been produced in the further course of the embodiment of the method shown here.

Meanwhile, the first terminal support 7.1 has been moved in the withdrawal direction. The tensile stress in the fabric web 2 was by appropriate

Control of the drive or braking means maintained at a constant level. In Figure 1 b is further shown that in the period in which a further auxiliary section 3.3 is woven, the clamp 10.2 of the second terminal support 7.2 detects the first auxiliary section 3.1 of the fabric piece 2.1 and connects to the second terminal support 7.2.

Then, a tension in the fabric piece 2.1 is established via the drive means of the second terminal support 7.2 and then the terminal 10.1 of the first terminal support 7.1 is opened.

Even while the auxiliary section 3.3 is produced by the loom 1, the first terminal support 7.1 is again moved back to its starting point at the entrance of the device 6 for removal.

In the backward movement, the terminal support 7 have a much higher displacement speed than in forward operation. Possible displacement speeds are, for example, 200 mm per minute in forward mode (i.e., loom production speed) and 3000 mm per minute in mm

Reverse operation. Of course, depending on the type of tissue, others can

Shifting speeds may be required. The drive means of

Terminal carrier 7 are to be interpreted accordingly.

The different speeds of the terminal carrier 7 in the

various process stages are shown in the figure 1 a- 1f by diagonal arrows or double arrows. The state after the previously described shifting back of the first

Terminal support 7.1 in the starting position is shown in Figure 1 c. In this position, the clamp 10.1 of the first terminal support 7.1 is closed again and thereby engages the fabric web 2 on the auxiliary section 3.2. Here is the

Tensile stress in the fabric web 2 again absorbed by the first terminal support 7.1. The second terminal support 7.2 is still closed on the auxiliary section 3.1. The tension in the fabric web 2 between the second and first terminal support 7.1, 7.2 can now be reduced because they are for the

Production process in the loom 1 does not matter. It only has to be prevented that the fabric web 2 sags between the terminal supports 7.1, 7.2.

FIG. 1 d shows the further progress of the method. In the meantime, another main section 4.3 has been produced by the weaving machine 1. The two clamp supports 7.1, 7.2 with the already produced fabric pieces 2.1, 2.2 were further shifted with production speed in the drawing direction. The terminal 10.2 of the second terminal support 7.2 remains closed for the time being and this again takes over the entire tension in the fabric web 2. Subsequently, the terminal 10.1 of the first terminal support 7.1 is opened and the first terminal support 7.1 is moved at an increased displacement speed back to its original position. During this process, the weaving machine 1 produces the auxiliary section 3.4.

FIG. 1 e shows that now at the end of the device 6 facing away from the loom 1, the fabric web 2 is taken over by an operator or by another transport device - this is indicated by the arrow in FIG

Discharge direction shown symbolically. The terminal 10.1 of the first

Terminal support 7.1 has now been closed on the auxiliary section 3.3 and the first terminal support 7.1 has again taken over the entire tension between loom 1 and device 6 for removal. Now the terminal 10.2 of the second terminal carrier 7.2 can be opened.

In a further process step - s. Figure 1f - will now be the second

Terminal carrier 7.2 shifted back to its original position. During this time, the weaving machine 1 produces another main section 4.4. Parallel to this will be the first terminal support 7.1 with the clamped auxiliary section 3.3 in

Draft direction shifted. Then, the loom 1 begins to produce the auxiliary section 3.5. At the same time closes the terminal 10.2 of the second

Terminal support 7.2 on the auxiliary section 3.3 and takes over the full tension in the fabric web 2. Next, the terminal opens 10.1 of the first

Terminal support 7.1 and this is moved at an increased displacement speed back to its original position, where he then detects the auxiliary section 3.4. This completes a complete process cycle. The two terminal supports 7.1, 7.2 have again the positions as shown in Figure 1 a. The process continues accordingly from then on.

This procedure ensures that during the production of the main sections 4 of the fabric pieces 2.1, 2.2, etc., no transfer or takeover of the pulled-off fabric web 2 takes place from one to the other terminal supports 7.1, 7.2. As a result, possibly occurring inaccuracies in the process due to slipping or stretched tissue, which could occur when the clamps 10 are opened and closed, become effective only during the production of the auxiliary sections 3. In the auxiliary sections 3 plays a possibly deviating or fluctuating

However, fabric quality is irrelevant because these sections are not used anyway in the end product, which is made only from the main sections 4. Another advantage of the embodiment of the inventive method described here is that the terminals 10.1, 10.2 of

Terminal carrier 7.1, 7.2, the fabric web 2 never on the main sections 4 of the fabric pieces 2.1, 2.2 detect, but only at the auxiliary sections 3. Damage to the main sections 4 through the terminals 10 is thereby completely excluded.

This is particularly useful, for example, in the production of multi-layer fabrics for use in fiber composite components. The fibers of these tissues are often very sensitive to their surface. Damage to the fibers or to the individual filaments of a fiber cause problems in the following processing processes. Figures 2-4 show an embodiment of an inventive

Device 6 for removing a web-shaped product. Shown is the structure together with a weaving machine 1. The entire arrangement is able to carry out the method according to the invention described above.

The device 6 includes two terminal supports 7.1 and 7.2 with clamps 10.1, 10.2 for the fabric web 2. There is a device frame 12 is provided, via which the device 6 is supported on the ground. On the device frame 12 are

Guides 13 arranged for the terminal support 7, in the present example over the entire length of the possible displacement path 8 of

Terminal support 7 are supported on the device frame 12. These

Guideways 13 can as profiled sliding guides or as

Rolling element guides - so-called ball guides - be executed This achieves a precise guidance of the terminal support 7 without major deformations of the guide tracks 13. In the present embodiment, the

Guideways 13 in the direction of the width of the fabric web 2 arranged symmetrically to the center of the terminal carrier 7. (Figure 3), to distribute the forces with which the terminal support 7 are supported in the device 6, evenly.

The device 6 further includes 2 pairs of drive spindles 14.1, 14.2, through which the terminal supports 7.1, 7.2 are driven parallel to the withdrawal direction of the fabric web 2. Each terminal carrier 7.1, 7.2 is a pair of these

Drive spindles 14.1, 14.2 assigned. The drive spindles 14 are arranged such that the web center of the fabric web 2 within the device 6 in a region between the two drive spindles 14 of the respective

Terminal carrier 7 runs. As a result, a symmetrical introduction of force from the terminal supports 7 into the drive spindles 14 is achieved when the terminal supports 7 are under the tension of the fabric web 2.

In the present example, the drive spindles 14 are arranged in the same plane 15, in which the fabric web 2 extends in the device 6. This is better than an arrangement in different parallel planes with a large vertical distance between the fabric web 2 and drive spindles 14, because it can occur under high tensile stresses unwanted deformations of the terminal support 7 and the drive spindles 14. In the present case, the drive spindles 14 are arranged symmetrically with respect to the center of the terminal carrier 7 in the direction of the width of the fabric web 2. This also serves the symmetrical introduction of forces in both drive spindles 14.1 or 14.2 of the respective terminal carrier 7.1 or 7.2. This applies at least when the fabric web 2 is also pulled symmetrically with respect to its width to the center of the terminal support 7.1, 7.2 by the device 6.

So that fabric webs 2 can be deducted with different widths, the terminals 10.1, 10.2 of the terminal carrier 7.1, 7.2 are each constructed of a plurality of pairs of clamping segments. This is best seen in FIG. These clamping segments are arranged distributed over the width of the terminal carrier 7 next to each other. Each of these clamping segments can be driven independently of the other clamping segments with a clamp actuator 1 1. That is, the pairs of mutually associated clamping segments each form a terminal 10 which can be opened or closed independently of the other terminals. As terminal actuators 1 1 pneumatic cylinders are used in the present example. Of course, other types of actuators 1 1 - for example, hydraulic or electromagnetic actuators 1 1 - used to operate the terminals 10.

FIG. 4 shows the device 6 for withdrawing the fabric web 2 in a view from above. It can be seen that the drive spindles 14 extend over the entire length of the displacement region 8. Each pair of drive spindles 14.1, 14.2, through which one of the two terminal supports 7.1, 7.2 can be driven, is mounted in the respective other terminal support 7.2, 7.1. There, where the driving forces of the

Drive spindles 14 are applied to the respective terminal carrier 7, 7 spindle nuts 16 are provided in the terminal support. When the spindle is rotated, these spindle nuts transmit 16 tensile or compressive forces in the withdrawal direction to the respective terminal carrier 7.

Where the two drive spindles 14.2 or 14.1 of the respective one terminal support 7.2 or 7.1 are guided by the respective other terminal support 7.1, 7.2, not shown bearing bushes are provided, the one

Supporting the drive spindles of a terminal support 7.2 or 7.1, in each case other terminal support 7.1 or 7.2 guaranteed. This reduces deflections of longer drive spindles 14.

Each of the four drive spindles 14 can be driven by its own drive motor 9. The torque of the drive motors 9 may be in known manner e.g. be measured on the power consumption of the electronic engine control and used to control the drive motors 9. The position determination of the two terminal carrier 7 within the device 6 takes place for example via an inductive path measuring system - such as in the field of guideways 13 - or incremental encoder within the drive motors 9. It is from the number of pulses or revolutions of the drive motors 9 on the Lead pitch the current position of the respective terminal carrier 7 determined.

The drive motors 9 for the drive spindles 14 are presently attached to the end of the device 6, which faces away from the weaving machine 1. On this side, axial bearings of the drive spindles are provided in the device frame. The tensile stresses in the fabric web 2 therefore generate tensile forces in the drive spindles 14. Only when moving back the

Terminal support 7 against the withdrawal direction can compressive forces in the

Drive spindles 14 occur. However, these are low, so there is no risk of improper deformation or even buckling.

The present embodiment of the device 6 has the second

Terminal carrier 7.2 two take-off rollers 17, 18, which form an adjustable nip between them. The upper take-off roll 17 can be brought to different positions for adjusting the nip perpendicular to the fabric web 2. For this positioning relative to the fabric web 2 provides a suitable actuator 19 - for example, a geared motor with spindle. The lower take-off roll 18 contains for driving inside, for example, an electric drum motor - but other types of drive with motors outside the take-off roll 18 are possible. Also conceivable is the drive of the upper take-off roll 17 or both rolls 17, 18. With this pair of rolls 17, 18, the drawn fabric web 2 can be transported beyond the second Klemmenträgers 7.2 on. In addition, if necessary, the already deducted fabric web 2 can be supported with this pair of rollers 17, 18, while the second terminal carrier 7.2 on the way back from its final position to the starting position (see figures "le and 1f).

With the described device, other procedures can be realized. For example, it would also be possible to control the process so that, during most of the process steps, not the first clamp support picks up the entire tension of the fabric run but the second

Terminal carrier, wherein the first terminal carrier in these phases only one

Auxiliary voltage builds up, which serves to prevent sagging of the fabric web.

To ensure the safety of the operators, the openly accessible displacement areas of the terminal support 7, the nips between the

Take-off rollers and the current drive spindles 14 secured by light grids, not shown. Light grids are used which reliably indicate an interruption of the light beam or light curtain even if the distance between transmitter and receiver is changed.

reference numeral

1 production machine, loom

2 Web-shaped product, fabric web

2.1, 2.2 pieces of tissue

3.1, 3.2, 3.3, 3.4, 3.5 auxiliary sections of the fabric piece

4.1, 4.2, 4.3, 4.4 Main sections of the fabric piece

5 output of the production machine

6 Device for stripping

7.1, 7.2 first, second terminal support

8 displacement of the terminal carrier

9 drive motors

10.1, 10.2 terminals

1 1 Actuator for operating the terminals

12 device frame

13 guideway for clamp carrier

14.1, 14.2 pairs of drive spindles

15 tissue plane

16 spindle nuts

17 take-off roller above

18 take-off roller below

19 Actuator for setting nip

Claims

claims

Method for producing a web-shaped product (2) with a production machine (1) and with a device (6) for removing the web-shaped product (2) with two terminal carriers (7.1, 7.2) with clamps (10.1, 10.2) for the web-shaped product ( 2), as well as with

Drive means (9), by means of which the terminal carriers (7.1, 7.2) are driven back and forth parallel to a withdrawal direction of the web-shaped product (2), with the following method features:

- producing a sheet-like product (2);

- Pulling the web-shaped product (2) by the reciprocating movement of the terminal support (7) and opening and closing of the terminals (10.1, 10.2);

- Applying a tensile stress on the web-shaped product (2) by driving the drive means (9) of the terminal carrier (7.1, 7.2) with the terminals (10.1, 10.2);

characterized in that

the web-shaped product (2) is produced with successive main sections (4.1, 4.2, 4.3, 4.4) and auxiliary sections (3.1, 3.2, 3.3, 3.4, 3.5) and

that the clamps (10) are controlled in such a way that the opening and closing of the clamps (10) takes place only during the periods of production in which an auxiliary section (3.1, 3.2, 3.3, 3.4, 3.5) of the

sheet-shaped product (2) is produced.

The method of claim 1, wherein the terminals (10) are controlled such that only the already produced auxiliary sections (3.1, 3.2, 3.3, 3.4, 3.5) of the web-shaped product (2) are detected by the terminals (10).

3. The method according to claim 1 or 2, wherein the drive means (9) during

Applying the tension to the web-shaped product (2) in

Depending on the tension to be controlled. Method according to Claim 3, in which the drive means are designed as drive motors (9) which drive the terminal carriers (7.1, 7.2) via drive spindles (14.1, 14.2), the torque of the drive motors (9) being measured and for driving the drive motors (9) is used.

Method according to one of Claims 1 to 4, in which the

Production machine (1) is a loom.

Method according to Claim 5, in which the main sections (4.1, 4.2) of the sheet-like product (2) are produced as a multi-layered fabric.

Device (6) for withdrawing a web-shaped product (2) from a production machine (1) with two terminal supports (7.1, 7.2) with clamps (10.1, 10.2) for the web-shaped product (2), and with a device frame (12) Guide means (13) for the terminal carrier (7.1, 7.2), and with drive means (9) through which the terminal support (7.1, 7.2) parallel to a withdrawal direction of the web-shaped product (2) back and forth in a displacement area (8) can be driven, characterized in that each of the two terminal support (7.1, 7.2) with a pair of drive spindles (14.1, 14.2) is driven, wherein the drive spindles (14.1, 14.2) are arranged such that the web center of the web-shaped product (2) within the device (6) in a region between the two drive spindles (14.1, 14.2) of the respective terminal carrier (7.1, 7.2) extends.

Apparatus (6) according to claim 7, wherein the drive spindles (14) are arranged in a plane parallel to a plane (15) in which the web-shaped product (2) extends, the distance from one plane to the other plane is less than 3 times the diameter of the drive spindles (14).

9. Device (6) according to claim 7 or 8, wherein the drive spindles (14) in the direction of the width of the web-shaped product (2) symmetrically to the center the terminal carrier (7) are arranged.

10. Device (6) according to any one of claims 7 to 9, wherein the

Drive spindles (14) extend over the entire length of the displacement region (8), wherein each pair of drive spindles (14.1, 14.2), by one of the two terminal carrier (7.1, 7.2) is drivable in the other terminal carrier (7.2, 7.1) is stored.

1 1. Apparatus (6) according to any one of claims 7 to 10, wherein each of the

Drive spindles (14) with its own drive motor (9) can be driven.

12. Device (6) according to one of claims 7 to 1 1, wherein the

Guide means are designed as guide tracks (13) in the direction of the width of the web-shaped product (2) symmetrical to the center of the

Terminal carrier (7) are arranged.

13. Device (6) according to claim 12, wherein the guide tracks (13) over their entire length in the device frame (12) are supported.

14. Device (6) according to one of claims 7 to 13, wherein at least one drivable roller (17) for removing the sheet-like product (2) from this terminal carrier (7) is attached to one of the two terminal carrier (7.1, 7.2).

15. Weaving machine (1) with a device (6) according to one of

Claims 7 to 14.