ES2291647T3 - INSTALLATION FOR THE MANUFACTURE OF STRETCHING MATERIAL WITH FLAT SURFACE. - Google Patents

Abstract

A device is proposed for producing expanded flat material, comprising a cutting and expanding device and a coiling device, the starting material for which is a foil web, the expanding device having toothed belt pairs or the like conveyor means guided over partially driven deflection rollers, which conveyor means hold the foil web at the edges and makes it advance and gives the expanded strip a uniform structure over the entire width. This is characterized in that the expanding device on both sides of the foil web has respectively one toothed belt pair that guides the foil web vertically upwards with one lateral edge, starting from the horizontal plane, via hinged, optionally rigid, sliding blocks arranged in the interior area of the toothed belts, while the other lateral edge of the foil web is guided vertically downwards in the same manner, i.e., forming a scissor movement, and an expansion of the foil web is formed across the resulting diagonal.

Description

Installation for the manufacture of material stretched with flat surface.

The invention relates to an installation for the manufacture of stretched material with flat surface, which It consists of a cutting and stretching device as well as a winding device, whose starting material is a sheet or continuous blade, which is guided between cutting cylinders overlays installed with individual cutting blades smooth upper and lower cutting blades, which define the length of cut thanks to some recesses arranged alternatively within the cutting zone, providing the Stretching installation or stretching device of a couple of pairs of timing belts that extend over bypass rollers or partially driven guide or similar means of transport, which hold or firmly hold the sheet or continuous sheet in the edges and makes it move forward.

According to US-A 4 102 024 it has been given to know an installation, which is dedicated to the manufacture of stretched material In this case, a large amount of cutting dies against the continuous sheet or blade and at the same time is gradually taken out, so that form a stretched band. A guide wheel is used for centering of the stretched band. It is disadvantageous that there is no lateral support and, therefore, flat layers cannot be achieved due to the difference in length with the edges.

Also in US-A 4 486 927 unveils an installation for the manufacture of material stretched, in which cutting cylinders are used for the drilling achievement. A stretching device squeezes with a series of stretched wheels the continuous sheet or sheet gradually down, so that a band of stretched in the form of V. Also in this case it is applied that it is not capable of manufacturing a surface material band flat.

According to EP-A-0 669 176 a procedure and device for the manufacture of conical bodies, non-deformable, in which it is also provided a stretching device in order to configure a continuous sheet in a stretched band. In this case a corresponding pair of timing belts, upper and lower, which firmly hold the sheet or continuous sheet by the edges and the transports, being provided between the pairs of belts a stirrup directed upwards, which makes it possible to stretch the sheet keep going. As this kind of stretch stirrup has the disadvantage or inconvenience of creating dust particles due to the abrasion or rubbing, has been used instead of the stirrup of stretched a movable roller.

In order to achieve a uniform stretch, the roller Bifurcated or bipartite and axially adjustable. As a defect, it has been shown that the abrasion particles, but in the center of the stretch band inequalities occur, e. d., a uniform configuration of the stretching band was only hard to get on the whole width.

In addition in patent specification US 4 621 397 A, US 4 305 187 A and US 5 088 170 A can be seen similar facilities, which, however, cannot be applied to request object.

Starting from this state of the art, the invention was proposed to create a facility for the manufacture of flatbed stretching material, which contains a stretching device, which lends or confers on the band of stretched a uniform structure over its entire width. According to the invention the objective is achieved by the fact that the stretching device, on both sides of the sheet or sheet continuous, it has a pair of timing belts respectively, leading with a side edge perpendicularly up the continuous sheet or sheet from a horizontal plane by means of sliding skids articulated, possibly rigid, in the inner zone of the toothed belts, while the other side edge of the sheet continues, in equal shape, is guided or leads perpendicularly down, that is, forming a scissor movement, and a stretch of the continuous sheet or sheet in the direction of the resulting diagonal.

In this way it is achieved that it is susceptible to manufacture a flat stretch band, which is free of internal tensions.

It is advantageous if the skates of sliding features joints and these are adjustable in height. In this way you can adjust different widths of stretched.

It is also advantageous if the top skate of sliding is set scrollable perpendicular to the inner side of the toothed belt. At the same time it fits the possibility of taking into account the material thickness of the band stretched.

It is also advantageous if the surfaces of sliding of the upper skate and the lower skate are configured, in equidistant distance, as straight planes or eventually surfaces provided with a radius, which form a gradual or gradual transition to the stretched position with respect to the sheet or continuous sheet. This is important for the straps serrated hold the edge of the continuous blade firmly throughout the length.

With the help of an example of execution you are going to explain the invention in detail.

Figure 1 shows an elevation installation lateral with the stretching device.

Figure 2 shows a front view of the stretching device (section A - A).

Figure 3 shows a variant of Stretching device configuration.

Figure 4 shows the configuration of the timing belts (detail B).

Figure 1 schematically shows a installation for the manufacture of stretch bands, in which The stretching device 10 according to the invention is mounted. From a feeding drum 2, in which it is rolled as starting material a continuous band 1, this is taken to the cutting device 3. This cutting device 3 consists essentially of an overlapping upper cutting cylinder 4 and a lower cutting cylinder 5. The upper cutting cylinder 4 is configured as a smooth cylinder with cutting means, while the lower cylinder 5 has, alternatively, some recesses within the cutting area, forming the length of cut. After the sheet continues 1, when passing, it has received in uniform intervals some indentations, this is taken to a tensioning device 6. This has a bypass roller 7 placed above, the sheet or continuous sheet being brought down to a tensioner roller 6 and then carried up, by a bypass roller 8, back to the horizontal position, to be then led to the stretching device 10.

The stretching device 10 contains in each essentially a pair of toothed belts 18, 19, which guide or drive with the help of a series of diverter rollers 11 up to 17 and positioned at the edges of the sheet or continuous sheet 1. Thus the upper toothed belt 18 is driven around the deflector rollers 11, 13 and 15, looking out the teeth of the side of the toothed belt 20. Instead, the side of the belt Toothed 21 is smooth and is located on the inner side. Also the lower toothed belt 19 is driven on the bypass roller 12, 14 and 16, 17. Also in this case the timing belt 19 is serrated out while the inner face is set, again, smooth. The pairs of timing belts 18, 19 they are engaged between the cylinders or bypass rollers 11, 12 and 13, 14 and firmly hold the continuous sheet 1 by the edges. In instead of toothed belts chains can also be used serrated or similar means of transport. In the center of stretching device 10 is a top skate of slip 22 and a bottom slide skate 23. The skate upper slide 22 presents a guide, which with a straight plane, possibly a radius R, carries the edge of the sheet u continuous sheet 1 of bypass roller 11 to bypass roller 13.

In the equidistant distance the guide is located also on the lower slide skate 23, so that both toothed belts 18, 19 mesh and between them is the edge of the sheet or continuous sheet 1. One of the rollers of Bypass, for example 11, is configured as a drive roller.

It is also advantageously to configure the lower bypass roller 12 as drive roller in order to ensure uniform traction of the pairs of timing belts 18, 19. The upper sliding skate 22 also has a adjustment device 24 in order to align it perpendicularly to the inner side of the toothed belt 18 and the pressure of squeeze in.

The lower toothed belt 19 runs on the bypass roller 12 already mentioned, which can be configured as a drive roller and is driven on bypass rollers 14, 16, 17. But it is also possible to transmit the drive with help of a pinion next to the toothed belt 20 because in this way only one drive or drive branch is needed. In the upper skid zone 22 is now secured rigidly the lower sliding skate 23 to the frame of the machine.

On the opposite side of the stretching device 10 - indicated in the drawing with dashed line for your best understanding - a pair of belts is installed in the same way serrated 18, 19, which now engages on the edge of the other side of the sheet or continuous sheet 1. But the difference is that the edge of the continuous sheet 1 is guided or guided downwards. The Bypass roller arrangement is certainly the same, but inverted The same applies to skates. 22, 23. At the entrance of the stretching device 10 the sheet u continuous sheet 1 is flat, it is gripped by straps serrated 18, 19 and with one side is carried up by skids 22, 23 and the arrangement of the cylinders bypass 13, 14. On the opposite side the pair is driven down of belts 18, 19 by position of the bypass rollers 31, 32. By meshing the pairs of toothed belts 18, 19 a jagged profile is produced at the edges, which in the case of lateral extension or elongation of the continuous band 1 compensates for change in length in the stretch and, therefore, take result a flat stretch band. The sheet or continuous sheet 1a taken from the stretching device 10 now comes to a change of direction 25, which is formed by a pair of cylinders 26, 27 smooth, overlapping. This is important for the elimination of residual tensions Then the sheet or continuous sheet 1 stretched reaches a collecting drum 28.

According to section or section A-A of figure 1 is represented in figure 2 the front view of the stretching device 10. In the center is the sheet or sheet continued 1, as introduced in the stretching device 10. Thanks to the arrangement of the pairs of timing belts 18, 19 and of the necessary bypass rollers as well as the skates of sliding 22, 23 is pressed or pushed up the edge of the sheet or continuous sheet 1 and similarly is carried down in The other side of the edge. By this change in width they are extended the slits made in the sheet or continuous sheet 1. From advantageously this stretch equals fivefold, with preference to triple the primitive width. This depends on first of the nature or properties of the material, but also of the chosen cutting length of the blade continued 1. At the same time the diverter rollers 13, 14, 17 as well as the sliding skates 22, 23 are arranged for the edge of the sheet or continuous sheet 1 guided upwards, while that the rollers directed to the downward edge serve detour 31, 32.

Figure 3 shows a variant of the device stretched 10, whose sliding skates 30 are configured susceptible to movement according to the arrows by of a joint 29. These can be well adapted to the guide of the pairs of toothed belts 18, 19. Otherwise the same reference numbers for bypass rollers, as already are indicated in figure 1. To the upper toothed belt 18 the diverter rollers 11, 13, 15 correspond, while the Bypass rollers for the lower toothed belt 19 have the reference numbers 12, 14, 16 and 17, seen in the sense of movement. The same applies to the other side, which moves for the edge guided down on the deflection rollers 31, 32. Also in this case the other side of the stretching device It is indicated with dashed line.

Figure 4 shows the configuration and position of the timing belts 18, 19, which are in place placed with identification B in figure 1. Teeth they engage oppositely and between them is the sheet or sheet Continue 1, which now receives the tooth shape. The sides outside of the timing belts 18, 19 are provided with a smooth face of the timing belt 21.

The essential advantage of this device stretched 10 consists in the fact that this is simple in its construction, variable adaptability and also results in a uniform structure over the entire width of the continuous sheet or sheet stretched. But this is the condition prior to the multifaceted application of this type of bands stretched.

Claims (4)

1. Installation for the manufacture of flat surface stretched material, which consists of a cutting and stretching device (3, 10) as well as a winding or winding device (28), whose starting material is a sheet or sheet continuous (1), which is guided between superimposed cutting cylinders (4, 5), installed with individual cutting blades, smooth upper and lower cutting blades, which define the cutting length thanks to recesses arranged alternately inside of the cutting area, the stretching device (10) having pairs of serrated belts (18, 19) or similar means of transport, which extend over partially driven bypass rollers or guide (11, 12, 13, 14, 15, 16, 17), which firmly hold the sheet or continuous sheet (1) by its edges and move it forward through the formation of the teeth, characterized by the fact that the stretching device (10), in both sides of the foil na or continuous sheet (1), has a pair of serrated belts (18, 19) respectively, which carries or guides, with a lateral edge perpendicularly upwards, the continuous sheet or sheet (1) from a horizontal plane, by means of sliding skates (22, 23, 30) articulated, possibly rigid, arranged in the inner area of the toothed belts (18, 19), while the other side edge of the continuous sheet or sheet, of the in the same way, it is guided or driven perpendicularly downwards, forming a scissor movement, and a drawing of the continuous sheet or sheet (1) is formed in the direction of the resulting diagonal (1a). 2. Stretching device according to claim 1, characterized in that the sliding skates (30) have articulations and these are adjustable or adjustable in height. 3. Stretching device according to claim 1 and 2, characterized in that the upper sliding skid (22) is configured with the possibility of movement perpendicularly to the inner face of the toothed belt (24). 4. Stretching device according to claim 1 to 3, characterized in that the sliding surfaces of the upper sliding or guide skate (22) and of the lower sliding or guide skate (23) are configured, in the equidistant distance , as straight planes or possibly as surfaces provided with a radius R, which form a gradual or gradual transition to the stretched position in relation to the continuous sheet or sheet (1a).