EP3942238A1

EP3942238A1 - Apparatus and method for stretching moving web-like material in a direction transverse to the movement direction

Info

Publication number: EP3942238A1
Application number: EP18811139.7A
Authority: EP
Inventors: Christian Meyer
Original assignee: Andritz Kuesters GmbH
Current assignee: Andritz Kuesters GmbH
Priority date: 2017-10-11
Filing date: 2018-10-11
Publication date: 2022-01-26
Also published as: DE212018000295U1; DE202017106166U1; WO2019072342A1

Abstract

An apparatus and method for stretching moving web-like material in a direction transverse to the movement direction, comprising a cylinder (18) with a longitudinal axis (24) and a lateral surface, wherein the longitudinal axis (24) defines an axial direction and the cylinder (18) can be made to rotate about the longitudinal axis, and wherein the lateral surface forms a bearing surface for the material, also comprising guide means (20) for guiding the material, during operation of the apparatus, such that it rests on the bearing surface of the rotating cylinder (18) over a certain angle range, and further comprising first and second retaining means (26) by way of which a respective one of two peripheral regions of the material which are located opposite one another in the axial direction are retained while the material is resting on the bearing surface of the cylinder (18), wherein the first and second retaining means (26) are designed to execute a relative movement away from one another, within the angle range, in the axial direction and to stretch the material in the axial direction.

Description

DEVICE AND METHOD FOR TRACKING MOVING RAILWAY GOOD CROSS FOR MOTION DIRECTION

TECHNICAL FIELD OF THE INVENTION

The invention relates to a device and a method for stretching moving web-shaped material transverse to the direction of movement.

BACKGROUND OF THE INVENTION

In various manufacturing and treatment processes of web-shaped material, in particular web-like textile fabric, it is desirable to extend the moving through a corresponding manufacturing or processing machine Good transverse to the direction of movement, for example, by a by a

Machining process such as drying offset shrinkage in the transverse direction at least partially. These are so-called tension or

Drying frame known, on which the material is clamped, for example, to dry. In most modern production processes, treatments such as drying should, if possible, be carried out "on the fly", ie in motion, in order to make better use of production capacities.

In order to prevent shrinkage during drying by means of drying rollers, DE 6604413 U describes a device in which the material is stretched out in front of the support by means of a clamping field with needle chains and then stretched on a perforated screen drum. DE 1917757 B2 describes a device in which the needle chains partially wrap around the screen drum. Both devices fix the material while it is dried by means of the sieve drum, so as to prevent shrinkage. A stretching of the goods in the transverse direction is with these

Devices but not possible. DISCLOSURE OF THE INVENTION

The invention is based on the object to provide an apparatus and a method which allow to stretch a web-shaped Good of the movement transversely to the direction of movement in a controlled manner.

The object is achieved by a device having the features of claim 1 and a method having the features of claim 18. Advantageous

Embodiments and developments of the invention are the subject of the respective subclaims.

The invention advantageously allows moving web-like material in

controlled way when running around a so-called cylinder to stretch a preferably adjustable measure transverse to the direction of movement.

Typically, the cylinder is a so-called

Drying cylinder, also called drying roll, which is heated to deliver heat to the material circulating around it, for example, to dry the goods or to change certain physicochemical properties of the goods. Further details and advantages of the invention will become apparent from the following purely exemplary non-limiting description of various

Embodiments in conjunction with the drawing comprising eight figures.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 shows a schematic perspective view of a portion of a device according to the invention. Fig. 2 shows a view of a portion of the device according to

Fig. 1.

Fig. 3 shows a detailed view of the device, in particular a

Pressure roller in a rest position in schematic

Perspective view. shows the detailed view of the apparatus of FIG. 3, but with the pressure roller is pivoted to a working position. shows a segment cylinder according to the invention in a schematic perspective view in a basic position. shows the segment cylinder of FIG. 5 in a perspective view of one of its end faces with removed cover plates. shows the segment cylinder of FIG. 5 in side view in the basic position. shows the segment cylinder of FIG. 7 in one of several possible working positions. shows a schematic perspective view of a segment of the

Segment cylinder.

DESCRIPTION OF PREFERRED EMBODIMENTS

In Fig. 1 is a designated in its entirety with 10 device for stretching moving web-shaped Guts 12, in particular a textile fabric web, shown in fragmentary form. In particular, only a small part of the product 12, which may in nature be a web of several hundred meters in length, or even a web fed endlessly from a production plant, is shown. The material 12 is supplied in this embodiment via a guide roller 14 and a first guide roller 16, which forms a first guide means in the context of the invention, a cylinder 18, which is preferably a heated drying cylinder for drying the material 12, that it is on the outer surface of the

Cylinder 18, which forms a bearing surface for the Good 12, rests and moves with the cylinder, which rotates in operation about its longitudinal axis, before it via a second guide roller 20, which forms a second guide means according to the invention, from the cylinder 18 is taken away. The guide rollers 16 and 20 are arranged in this embodiment so that the material over an angular range of about 270 ° rests on the cylinder and during the time it takes the cylinder to perform a rotation of 270 °, with the support surface in contact is, so that when it is in the cylinder 18 is a heated drying cylinder, heat can be transferred to the estate.

The rollers and the cylinder are rotatably mounted in a block 22. They can, as indicated in the drawing by the various engine elements, be driven or moved alone by the passing of the goods 12. The design of corresponding rollers and the cylinder is known per se. In particular, several cylinders can be connected in series, to a larger

Drying line to form. The opposite ends of the block 22 and in the schematic representation of Fig. 1 quasi freely floating ends of the rollers and the cylinder are mounted in the intended mounting state in a block 22 similar block.

In Fig. 2, details of the device 10 are shown schematically in a view in the direction of arrow II in Fig. 1, in particular some of this

Embodiment than in the axial direction defined by the axis of rotation 24 of the cylinder 18 slidable slide 26 formed first holding elements, the first holding means in the context of the invention. For reasons of clarity, only a few of these slides 26 are shown here. In fact, in typical applications of the invention in which, for example, the cylinder 18 has a diameter in the range of about 600 to 1,000 mm with a width of up to several meters, about 50 to 70 such slides are provided in each case a guide 28 as through the movement arrows 30 are indicated in the axial direction are displaceable in order to stretch a guided over the cylinder 18 Good, especially a textile web. The extension-causing movement of the sliders 26 in the axial direction can be effected in different ways. For example, it is possible, and in particular if only a few slides are provided, to implement each slide with a single, preferably separately controllable actuator, which makes it possible to move each slide in a precisely defined manner. In the illustrated currently particularly preferred embodiment the axial displacement of the slide 26 is effected via a slotted guide, in which a guide track 32 which can be changed as explained below is formed in a so-called segment cylinder 34. In the guideway 32 rollers 36 acting as sliding blocks 36 are positively guided, so that when the segment cylinder 34 is stationary and the cylinder 18 rotates together with the slides 26, the slides are translationally moved in the axial direction.

As indicated by the movement arrow 38, also the segment cylinder 34 can be moved translationally in the axial direction to a certain extent, what it u.a. allows to process different widths of sheet material. However, in the presently preferred embodiment, the movement of the segment cylinder 34 also plays an important role when the segments constituting the segment cylinder are moved from a non-stretched neutral position to a position where the guideways are determined by them 32 runs so that the slides extend the respectively supplied good. Typical travel distances of the segment cylinder are in the range of approximately 50 to 100 mm. In the same area are typically also the travel paths of the individual slides or the other holding means, so that, if over this area movable holding means are provided in both end portions of the cylinder 18, the web-shaped Good order

corresponding to twice the amount in the axial direction, that is transverse to

Direction of movement Good can be stretched.

The material, not shown in Fig. 2 is performed in the embodiment shown in operation on the cylinder 18, that in each case a lateral edge region of the goods on the needle plates not shown here flat ends of the slider 26 lays and the needles of the needle plates is then held positively. It can, as will be explained below in connection with Figures 3 and 4, by means of corresponding pinch rollers, a particularly good connection between the needles and the goods are guaranteed. Of course, instead of the slides with needle plates shown, any other holding elements or holding means may also be provided, e.g. Elements that are active on the edges of the goods

pinch. It is also possible to use, instead of a movable slide, e.g. oblique needle straps or the like. to use, but positively guided slides have proven particularly useful. Opposite grippers have slides or other

Holding means with seen from the cylinder radially outwardly pointing needles Advantage that the material can be easily applied to the needles and removed from these again. In order to facilitate the removal, it can be provided that the arranged at opposite ends of the cylinder 18 slide or other holding means at the end of the circulating movement of the goods around the cylinder 18, so at the end of typically about 210 ° to 330 °, more preferably about 240 ° to 300 °, more preferably about 270 ° angle range carry out a relative movement towards each other, so as to reduce the force exerted by the holding means on the goods transverse stress. In this embodiment, each slider 26 is located at one end of the cylinder

18, a corresponding slider at the opposite end of the cylinder 18 opposite, so that the slide at the opposite ends of the cylinder 18 form pairs of holding elements. In order to effect the necessary relative to the stretching of the goods in the axial direction relative movement of the holding the side edges of the goods holding means, it is sufficient if the first or the second holding means move absolutely. However, in order to effect a uniform stretching and also make optimum use of the available space, the solution described here is currently preferred, in which over the angular range both the first and the second holding means, here in the form of first and second holding elements forming slides move absolutely in the axial direction away from each other, and they can, as already stated, advantageously at the end of the angular range at least slightly to move toward each other so as to remove the transverse stress from the estate and to facilitate the detachment from the respective holding means.

In the schematized-perspective views shown in FIGS. 3 and 4 (not to scale and in particular with regard to the length of the illustrated rollers and the cylinder greatly shortened) shown the area in which the material to be treated 12 via the guide roller 14 and the first guide roller 16 is supplied to the cylinder 18, wherein the viewing direction as indicated in Fig. 1 by the arrow III extends. Good to recognize the roughly reminiscent of a gear holding means receptacle 40, which is provided in this embodiment with a plurality (eg 60) of guides 28 for slide 26, for reasons of clarity, only a few slides are shown. In the intended mounting state, a slider 26 would typically be located in each guide 28, depending on the material also be possible can provide fewer slides, if, for example, stretches should be made only at certain points of the good.

The retaining means receptacle 40 is non-rotatable relative to the cylinder, i. arranged so that it rotates synchronously with the cylinder 18, so that correspondingly also the holding means received in it, here the slider 26, rotate synchronously with the cylinder 18. A corresponding holding means receiving is provided in this embodiment at the opposite, not shown here other end of the cylinder 18. Good to see is also a pinch roller 42, which is preferably a so-called brush or hair roller and which is shown in Fig. 3 in a rest position and in Fig. 4 in a working position. In the

Working position pushes them the supplied Good 12 on the slider 26, more precisely located on the free end of the slider needle plates, so that a secure form-liquid connection between the slides 26 and the Good 12 is made.

In FIGS. 5 to 8, the above-mentioned segment cylinder drawn in its entirety by 34 is shown in various views and working positions. In this case, the segment cylinder 50 in this exemplary embodiment comprises four segments 52, 54, 56 and 58 and, as a whole, is movable in the axial direction as indicated by the movement arrow 38.

In the embodiment shown, the segment 52 extends over an angular range of about 180 ° and, in the stretching operation, serves to axially outwardly guide the slides, which are guided in the guide track 32 formed by all the segments. From the center of the web-shaped material transverse to its direction of movement, so that the material held by the sliders is stretched in the axial direction.

The segment 56, which extends over an angular range of approximately 90 °, serves in the working position to return the sliders from the region of maximum extension to the starting position. The two segments 54 and 58, which each extend over approximately 45 °, form transition regions between the segments 52 and 56, the so-called needling, in which the material supplied to the cylinder is preferably pressed onto the slides using the pressure rollers described above, in the region of the segment 58, while the so-called needling, so the lifting of the goods from the sliders in the area of the segment 54, or preferably shortly behind it, when the slides move back out of the region of maximum extension and so tension is removed from the goods takes place. In Fig. 5 are pivoting mechanisms of the segments 52 and 56 of cover plates

62 hidden. In the illustration of Fig. 6, which is a perspective view of the cylinder facing away from the end face of the segment cylinder 34, the cover plates are removed, so that the pivot mechanisms are recognizable. The segment 52 is pivotable about an axis 64 and the segment 56 about an axis 66. The segments 54 and 58 coupled to these segments move in a purely translatory manner as the segments 52 and 56 pivot. in the above axial direction. Between the segments elastic buffers not shown here are advantageously arranged, which ensure a smooth transition between the segments, so that a continuous guide track 32 is formed, which can easily follow the slider.

In FIGS. 7 and 8, the segment cylinder 34 is shown in a neutral position (FIG. 7) and a working position (FIG. 8). In the neutral position runs the

Guideway 32 parallel to the orbit of the cylinder, so that the slides rotate with the cylinder, without stretching the goods. In the one shown in FIG

Working position, the segments 52 and 56 are pivoted about their said pivot axes, at the same time the entire segment cylinder has been moved away from the cylinder such that the pivoting of the cylinder 52 and 56 caused moving of the segment 58 is compensated for the cylinder. The segment 58 is therefore located after the pivoting of the segments 52 and 56 and the

Moving the segment cylinder 34 in the axial direction relative to the cylinder in the same position as in the neutral position shown in FIG. 7, so that

Needles can be tension-free, while the slider then from the

Section of the guideway 32, which is formed in the segment 52, are guided away from the cylinder and stretch the material accordingly.

The segment cylinder 34 advantageously allows different

Set guideway geometries and stretch the good more or less strong. Thus, it may be desirable for certain fabrics to completely compensate for shrinkage caused by drying by stretching while it is others may want to compensate for shrinkage only partially. Also, as indicated above, the stretching must not be preceded by shrinkage and it may be an independent processing step.

Typically, the invention is used with drying cylinders that are actively heated and heat the rotating good.

FIG. 9 shows by way of example the structure of a segment 54 of the segment cylinder which can only be displaced translationally. The guideway 32 is formed by two lateral guides 64 and 66, which are interconnected and in this

Embodiment over two guide rods 68 and 70 are guided. Since that

Segment 54 is coupled to segments 52 and 56 (see, e.g., Fig. 6) in the intended mounting condition, it follows the movement of these segments.

Accordingly, the segment 54 does not need its own drive for adjustment, but it can also be provided with a drive, so that then the segments 52 and 56 need not have their own drive. Here, the expert can choose the optimal design for the particular application.

Within the scope of the inventive concept, numerous modifications and

Developments possible, e.g. refer to the configuration of the segment cylinder and the configuration of the holding means. Thus, e.g. the adjustability of

Of course, guideway 32 may be achieved in other ways than by the pivoting mechanisms shown. In particular, it is possible to use other numbers of segments instead of the four shown, and to use these e.g. not, as in the embodiment shown, to pivot about in the middle of the pivotable segments arranged axes, but about axes that are close to the transition region to an adjacent segment.

Claims

1. A device for stretching moving web-shaped material transverse to the direction of movement, comprising

- A cylinder having a longitudinal axis and a lateral surface, wherein the

Longitudinal axis defines an axial direction and the cylinder is displaceable about the longitudinal axis in rotation and wherein the lateral surface forms a bearing surface for the good,

Guide means to guide the good in the operation of the device so that it rests on a certain angular range on the support surface of the rotating cylinder, and

first and second holding means for holding in each case one of two mutually opposite in the axial direction edge regions of the goods while resting on the support surface of the cylinder,

characterized,

in that the first and second holding means are designed to carry out, within the angular range, a relative movement in the axial direction directed away from one another and to stretch the product in the axial direction.

2. Apparatus according to claim 1, characterized in that the first and second holding means comprise clamping means, each frictionally hold edge portions of the goods.

3. A device according to claim 1 or 2, characterized in that the holding means comprise needles, which hold each edge portions of the goods positively.

4. Apparatus according to claim 3, characterized in that at least two opposing in the axial direction of the pressure rollers are provided in order to press the goods at the beginning of the angular range on the needles.

5. Device according to one of claims 1 to 4, characterized in that the first and second holding means are arranged rotatably relative to the cylinder.

6. Device according to one of claims 1 to 5, characterized in that the size of the relative movement of the first and second holding means is adjustable.

7. Device according to one of claims 1 to 6, characterized in that the holding means are adjustable to different Gutbreiten.

8. Device according to one of claims 1 to 7, characterized in that the first and second holding means comprise a plurality of each other in the axial direction in pairs opposed first and second holding elements, wherein each form a first and a second holding element a pair of holding elements.

9. Apparatus according to claim 8, wherein at least one of the holding elements of each pair of holding elements, preferably both holding elements are slidable slides in the axial direction.

10. The device according to claim 9, characterized in that each slide is displaceable via an actuator in the axial direction.

1 1. A device according to claim 9, characterized in that each slide is slidable via a slotted guide in the axial direction.

12. The device according to claim 11, characterized in that the

Sliding guide comprises a guide rail formed in a segment cylinder formed from a plurality of segments.

13. The apparatus according to claim 12, characterized in that at least certain segments of the segment cylinder for changing the guideway are adjustable.

14. The apparatus according to claim 12 or 13, characterized in that the

Segment cylinder is movable relative to the cylinder in the axial direction.

15. Device according to one of claims 1 to 14, characterized in that the angular range is about 210 ° to about 330 °, preferably about 240 ° to about 330 °, more preferably about 270 °.

16. Device according to one of claims 1 to 15, characterized in that the first and second holding means are adapted to perform at the end of the angular range directed towards each other relative movement.

17. Device according to one of claims 1 to 16, characterized in that the cylinder is a heated drying cylinder.

18. A method of stretching moving web-shaped goods transverse to the direction of movement, comprising the steps of:

Guiding the material onto a bearing surface of a rotating cylinder such that the product rests on the bearing surface over a certain angular range, the cylinder rotating about an axis defining an axial direction,

Holding two opposite edge portions of the goods while resting on the support surface and

Pulling the opposite edge regions of the goods while resting on the support surface.

19. The method according to claim 18, characterized in that the

Pull apart the edge regions of the material by continuously increasing the distance between the first and second holding means, which hold the edge regions of the material during rest on the support surface takes place.

20. The method according to claim 19, characterized in that the distance between the first and the second holding means at the end of the angular range is reduced again.

21. The method according to any one of claims 18 to 20, characterized in that the material rests over an angular range of about 210 ° to about 330 °, preferably from about 240 ° to about 300 °, more preferably from about 270 ° on the support surface.

22. The method according to any one of claims 18 to 21, characterized in that the cylinder is heated.