KR20150086296A - Suction roll system - Google Patents

Abstract

The present invention relates to a suction roll system (1) having a cylindrical suction roll (32) rotatably supported, wherein a cylinder jacket (34) of the suction roll is provided with a plurality of suction holes And these suction holes are selectively connected to the vacuum system 14 either individually or in a group manner via a control system, in which case the suction roll system is configured such that a plurality of suction holes 36 are driven in a group manner , It should enable a particularly short transition time and a high flexibility with it in a reliable manner. For this purpose, the control system comprises a hollow cylinder 2 fixedly mounted in accordance with the invention, in which its internal space 10 is connected to a vacuum system 14 and projects into the suction roll 32, The cylinder jacket (20) of the hollow cylinder is penetrated by a plurality of control slots (22).

Description

[0001] SUCTION ROLL SYSTEM [0002]

The present invention relates to a suction roll system having a cylindrical suction roll which is rotatably supported, wherein a cylinder jacket of the suction roll is provided with a plurality of suction holes, These suction holes can be selectively connected to the vacuum system either individually or in a group manner via the control system. The invention also relates to material webs, in particular paper webs or equipment for processing pulp webs.

In the paper or pulp processing industries, material webs are often processed. In this case a paper web is provided for further processing, for example when producing envelopes, articles of compression, etc., in which case the individual material portions from the paper web are cut, folded, compressed or otherwise processed . Similarly, for example, when making handkerchief, the pulp fiber web is subjected to further processing steps, in which case the handkerchief or other sanitary article is suitably cut to the desired size from the pulp fiber web, Lt; / RTI > are suitably folded and packed, for example.

When processing such a web of material or when processing a section of planar material that has been cut or separated from the web of material, the material is typically guided through a plurality of transport or processing devices within the facility provided for processing. Functional rolls are also frequently used in such situations, where the material web or material part is also guided and at the same time redirected, if possible, or even if it is possible. If necessary, a cutting device, an embossing device, or the like may be provided in such a functional roll, so that the material can be processed in accordance with the requirements while the individual material runs on the roll. At this time, such function rollers or function rollers can be realized as a so-called suction roll system in which the material running on the rolls is sucked into the function rolls in accordance with the demand, An excellent adsorption state of the material can be ensured.

Such a suction roll system as is known, for example, from German Patent Application DE 10 2009 033 575 A1, has a generally cylindrical suction roll which is rotatably supported, the cylinder jacket of which, in particular, There are provided a plurality of suction holes or suction slots that form a pattern and these suction holes or suction slots can be selectively connected to the vacuum system individually or in a group manner via the control system. In this case, by suitable actuation, the individual suction holes or the suction holes of the selected group are connected to the vacuum system as intended, so that in the region of the respectively driven suction holes the material portion is sucked into the suction roll and fixed to this suction roll .

For actuation, the suction holes are typically connected to the front side of the roll body through a suction channel system, which extends in the longitudinal direction of the roll body inside the roll body, and at the position of the individual suction holes And is branched out of the radial direction to communicate with the inside of the individual suction holes. In this case, a so-called control head is arranged in the fixed frame of the suction roll, corresponding to the front face of the roll body, the control head having a plurality of control openings, It is connected. When the suction roll is rotated, the front discharge port of the individual suction channel is later overlapped with the control opening in the control head as the case may be, so that in this case the corresponding suction hole is connected to the vacuum system. Thereby, when the suction holes are rotated, the vacuum is connected and disconnected as required in the individual suction holes, and as a result, the individual suction holes can be clocked correctly by the vacuum.

In such a system, however, the suction channels connecting the suction holes to the control head on the vacuum side, respectively, usually have a relatively unfavorable length-cross-sectional ratio, so that when switching between the vacuum mode and the normal pressure mode, Gas exchange within the channel is subject to relatively high flow resistance. Therefore, when a plurality of suction holes are driven jointly or simultaneously in a group manner, the switching time which can be reached by such a system is likewise limited with freedom.

It is an object of the present invention to provide a suction roll system of the above-described type, which enables a particularly short switching time and, in addition, a high flexibility in a reliable manner even when a plurality of suction holes are driven in a group manner .

This object is achieved according to the present invention by providing a control system provided for selectively connecting a plurality of or a plurality of suction holes or suction slots to a vacuum system, the inner space of which is connected to a vacuum system, And a cylinder jacket of the vacuum cylinder is penetrated by a plurality of control slots.

The present invention is based on the idea that the switching times that can be reached when the suction holes or suction slots are driven and the possible process speeds in the overall system together with them depend to a considerable extent on the channel structure when connecting the suction holes to the vacuum system depart. In particular, for short switching times and control times, efforts must be made to keep the connection channel as short as possible and the channel cross-section as wide as possible. For this purpose, by locating the space area (in the prior art systems, control head in the support frame of the suction roll) in which a constant vacuum is provided, consistently as close to the area of the suction hole as possible, It has been proposed that the connection channel between the vacuums can be kept particularly short.

To enable this situation, a hollow cylinder is provided which projects into the suction roll, and the internal space of the vacuum cylinder must be provided with a vacuum permanently during operation of the installation. Then, in order to "switch" the suction holes, it is only necessary to create another vacuum side space, that is, another pressure side connection between the internal space of the hollow cylinder and the individual suction holes. Therefore, the drive channel required for this is forced through the cylinder jacket of the hollow cylinder; On the contrary, it is no longer necessary to extend the channel in the longitudinal direction of the suction roll with a correspondingly long channel extension and a small channel cross-section. In this case, the hollow cylinder has a plurality of control slots in its cylinder jacket in order to enable the suction hole, more specifically, the inner space of the hollow cylinder and the vacuum-side connection portion of the suction hole to be driven. The drive, in other words the vacuum side connection of the vacuum space and the individual suction holes, was provided when the individual suction holes passed through one of the control slots as a result of the rotation of the suction roll.

The suction hole or each suction hole can have a circular cross-section, so that this suction hole becomes substantially the same as a conventional bore. Alternatively, such a suction hole may be formed on the cylinder jacket, for example depending on its position on the cylinder jacket and on the desired suction profile in the insert associated with actuation-also as an active suction surface which is formed differently, Shaped suction surface. The term "suction hole" should also clearly include such modified structural features.

Preferably, the control slots each extend in the circumferential direction of the cylinder jacket. By means of the position of the individual control slots, in particular the starting and ending points of the control slots and the circumferential length of this control slot, the desired control time for the individual suction holes can be appropriately adjusted in advance. In particular, by appropriately positioning a plurality of control slots of this type, which can be distinguished from one another in relation to the starting and / or ending points with respect to each other, a preset control pattern for the entire intake hole becomes possible, A drive pattern of a suction hole, which is particularly suitable for the installation process, is made possible by fitting an appropriate control slot in the cylinder wall of the hollow cylinder. At this time, the group-wise driving of the plurality of suction holes is also possible, for example, by suitably selecting the widths of the individual control slots, in which case the width of the control slots is particularly large, The suction holes can be dimensioned to pass cooperatively through the individual control slots.

At this time, particularly high flexibility can be achieved when the plurality of suction holes are driven in a group manner, and in this case in a particularly preferred embodiment, the suction roll has the shape of a distributor channel for vacuum to guide the channel in its cylinder jacket region Respectively. For this purpose, another distributor element implemented as a unique part may be provided, or the cylinder jacket of the suction roll may have a thickness sufficient to form such a distributor element, and the volume may be implemented to a large extent have. The distributor element formed by this variant is preferably implemented such that the control slot can be connected to a plurality of suction holes, each suitably selected on the vacuum side. For this purpose, the suction roll preferably comprises a distributor jacket rotatably supported about a hollow cylinder with the distributor element to form such a distributor element inside, the distributor jacket comprising a plurality of distributors Channel. By means of these distributor channels being pierced, the suction holes assigned on the discharge side to the individual distributor channels can be assigned to the respective selected control slot after individually presetting, in this case, in particular, in the longitudinal direction of the roll, The suction holes positioned with respect to each other can also be connected to individual control slots through suitable channel guides. In this way, by means of a suitable channel guide, even if the pattern of the control slot in the cylinder jacket of the hollow cylinder is predetermined, it is possible to achieve a relatively complicated, individual installation process and a driving which matches the driving demand of the resulting suction hole The pattern can be reached.

In a particularly preferred improvement, such a design scheme can be used to drive the suction holes in a groupwise manner, in particular in the longitudinal direction of the suction roll. For this purpose it has been proposed, preferably, that at least some of the distributor channels have a cross section extending from the inside to the outside. In particular, the distributor channel or each distributor channel preferably has a longitudinally extending transverse cross-section of the suction roll at the outer surface of the distributor jacket, resulting in a continuous arrangement of these distributor channels as viewed in the longitudinal direction of the suction roll So that a plurality of suction holes can be connected to the same distributor channel. On the inner side, the individual distributor channels may be implemented to have a relatively narrow dimensioned cross-section, for example in the form of a bore. In this embodiment, when the suction roll rotates about the hollow cylinder, the inner bores of the individual distributor channels pass through the control slots assigned to the interior of the hollow cylinder, whereby all the suction holes connected to this distributor channel at the outer side of the distributor channel It is operated simultaneously and synchronously with the vacuum.

In a particularly preferred embodiment, the suction roll system has been designed to replace the individual parts particularly easily. For this purpose, a hollow cylinder, which preferably projects into the suction roll, is fixedly connected to the support structure only on its front side, in particular on its own assembling end. At this time, the other end of the hollow cylinder whose front surface is closed with pressure preferably by a suitable cover is preferably fixedly supported on a drive flange protruding forward of the drive unit. In the present preferred embodiment, the suction roll and, optionally, the distributor jacket disposed inwardly within the suction roll, slides over the shaft (in particular of the motor flange) of the drive flange and is supported substantially completely above it. If desired, it can be additionally supported through a bearing system arranged at the assembly end of the hollow cylinder. Depending on the "flying supported state" of this type of suction roll, it is possible to form a modified hole pattern of the suction hole in the suction roll, for example for maintenance or repair work, The replacement of the parts can also be done in a particularly simple manner, in which case the suction roll and, if appropriate, the distributor jacket disposed inside the suction roll are drawn from the hollow cylinder end through the free end of the hollow cylinder, Replacement parts are replaced. At this time, a connection for connecting the inner chamber of the hollow cylinder to the vacuum system may be provided via a connection system arranged at the assembly end as well.

The suction holes can be arranged in the form of a hole pattern inside the cylinder jacket of the suction roll as a whole. However, in a particularly preferred embodiment, which is deemed proprietary and progressive, the cylinder jacket of the suction roll is formed in the form of a plurality of parts, in which the individual partial faces of the cylinder jacket are embodied as separate, separate parts , Each of which supports a plurality of suction holes. Thus, in a particularly preferred embodiment, the cylinder jacket of the suction roll is provided with a plurality of jacket strips each having a plurality of suction holes, releasably connected to the original or "inner" suction roll head. At this time, the jacket strip forms a suction pattern functionally matched by suitable positioning and / or dimensional design and / or structural selection of the individual suction holes or suction slots, . For example, one jacket strip may be embodied as a so-called suction strip, which has a substantially suction bore and fixes the beginning of each section of the fabric section when processing the pulp-cloth product. Alternatively, however, the jacket strip may also be embodied as a so-called folding strip, wherein the folding strip has a combination of suction and suction slots and fulfills the function of securing the fabric section when folded or folded Thereby resulting in the formation of a new front edge of the fabric section after folding in this embodiment.

According to such a shape, only the parts fixed by a screw, for example, implemented in the form of a screen can be replaced in order to match or deform the hole pattern formed on the surface of the cylinder jacket by the suction holes. Alternatively, other parts of the suction roll, especially the vacuum system with the original bottom body or inner body of the dispenser jacket and suction roll, can remain unchanged. Thus, matching the suction pattern or hole pattern is possible in a particularly simple manner.

Similarly, in another particularly preferred embodiment, the suction roll system has been implemented with a relatively low requirement level for the required vacuum, so as to suitably meet the needs of the paper web or toilet paper web, as intended. In the preferred embodiment, all of the at least some suction holes in the cylinder jacket of the suction roll have been implemented with a cross-section that gradually expands from the inner surface of the cylinder jacket toward the outer surface of the cylinder jacket. Embodiments in which one or several suction holes at their outer ends have cross-sectional contours that enclose a support surface whose suction surface is positioned at least partially close to the outer surface of the cylinder jacket of the suction roll is more preferred, proprietary and progressive .

The underlying discovery of this embodiment is that it is desirable to maintain a relatively small amount of vacuum from the normal pressure, i.e., the normal pressure, for the process progress, for various process technical reasons, The requirement level required for the sealing system and the like can be kept relatively low. Thereby, the gas exchange process can be reliably performed at a relatively low cost in terms of equipment, and still with a short switching time and response time. However, even with a relatively low vacuum level, in order to enable reliable process advancement, in particular of the clamping force required for fixing the paper web or material web in the suction roll, through the vacuum system, the effective suction surface of the individual suction holes, - the vacuum at the suction roll surface is applied to the material web through this through surface - must be dimensioned sufficiently large.

On the other hand, however, it should be taken into account that deformation may occur within the material web if the effective suction surface is measured to an excessively large dimension, particularly if the toilet paper material is relatively soft. Such deformation may result in a non-sealed condition which may adversely affect the process progress during material aspiration. In order to cope with this situation, the roll surface in the individual suction area is set so that the suction area (that is, the partial area of the effective suction surface of the individual suction hole) is located immediately adjacent to the support area where the material web is properly stabilized and fixed . For this purpose, immediately adjacent to the individual suction surfaces, the support surfaces provided for supporting the material are positioned, on which the material for avoiding deformation, for example wrinkles, can be suitably raised. In a preferred manner, the suction roll system is particularly inserted into a paper web or equipment for processing the material web of the pulp web. Thus, in such an arrangement in which the material web or pulp web is guided through a plurality of functional rollers or functional rolls, preferably these functional rollers or each of these functional rollers are embodied as a suction roll of the type described above.

In particular, the suction roll system can be used within the scope of processing cloth sections that are folded forward, in the form of strips of sanitary articles. These cloth sections are received by a fingersupported drum formed by a suction roll in which a vacuum and ventilation condition is provided radially in the suction bore due to the shape of the suction roll system as described above . The fabric sections are folded one or more times in the machine in the machine direction transverse to their direction of travel, and then fed out for further processing. At this time, the individual product sections are preferably fixed around the drum or suction roll through a plurality of rows of suction bores arranged transversely with respect to the direction of travel of the product section on the drum or roll.

The advantage achieved by the present invention is that in particular, by forming the control system as a hollow cylinder which projects into the suction roll, the switching path connecting the suction holes to the vacuum system at the time of driving can be kept particularly short. This makes it possible to reach a particularly short control time, correspondingly high process speed and high reliability. Particularly preferably, by connecting the distributor jacket in the middle, it is possible to flexibly and accurately synchronously drive the plurality of suction holes even if the channel length is short. In this case, in order to guide the distributor channel inside the distributor jacket, only the distributor jacket needs to be replaced, so that it is possible to reach a desired change of the drive pattern, for example, by the process.

Embodiments of the present invention will be described in detail with reference to the drawings. Explanation of drawings:
1 is an exploded view of a suction roll system,
Fig. 2 is a longitudinal sectional view showing the suction roll system according to Fig. 1 in a mounted state,
Figure 3 is a schematic view showing a folding strip for the suction roll system according to Figure 1,
Fig. 4 is a front view showing the folding strip according to Fig. 3;

In the drawings, the same reference numerals are given to the same parts.

The suction roll system according to Fig. 1 has been provided for use in equipment for processing paper webs or pulp webs, not shown in detail in the drawings. Within this facility, the paper web or pulp web is first guided as a whole through functional rollers, such as redirecting rollers, but also through cutting rollers or separation rollers. Depending on the intended use of the equipment, the material web may be cut into a plurality of individual flat material portions, such as, for example, paper products, or a plurality of pulp portions, such as handkerchiefs, in which case the material portions are then individually It is transported continuously or provided to another process. When continuing to transport the individual material portions, it is also possible to provide a type of machining process such as redirecting, supporting or for example another cutting process, window drilling, embossing or the like.

The suction roll system 1, which can be used as an individual function roller or as a functional roll at any place in the facility, is designed for reliable and highly accurate driving of individual suction holes as intended, The material web or individual material portion can be fixed as it passes over the outer surface of the roll. To this end, the suction roll system comprises a hollow cylinder 2 which is in turn supported at its one end 4, also referred to hereinafter as the "assembly end" 6, Respectively. The support structure is equipped with a drive motor 8 and a carrier flange 9, and the hollow cylinder 2 can slide on the carrier flange. At this time the internal space 10 of the hollow cylinder 2 is connected to the vacuum system 14 symbolically indicated by the vacuum pump 12 in Figure 1 through a through hole 11 provided in the assembly end 6 have.

The hollow cylinder 2 is closed in its pressure-sealing manner by its cover 18 at its free end 16 which can be embodied as a unique part or can be embodied as a casting body As shown in Fig. The cylinder jacket 20 of the hollow cylinder 2 is penetrated by a plurality of control slots 22 through which the inner space 10 of the hollow cylinder 2 is connected to the outer space Respectively. At this time, the control slot 22 has a hollow cylinder 2 and an extension extending in the circumferential direction of the cylinder jacket 20 of the hollow cylinder.

The suction roll system further includes a distributor jacket 30, which is disposed within the cylindrical suction roll 32. The distributor jacket 30, At this point, the dispenser jacket 30 may be embodied as a unique part inserted into and suited to the inside of the suction roll 32. In this embodiment, however, the distributor jacket 30 is formed by the unique cylinder jacket 34 of the suction roll 32, which has a suitable thickness and a large volume.

The cylinder jacket 34 of the suction roll 32 has a suction hole 36 which forms a hole pattern as a whole on its outer surface and through which the material to be lifted onto the surface of the cylinder jacket 34 is required As shown in FIG. And the suction roll 32 is closed by the cover 38 on the end side. In addition, the cylinder jacket 34 of the suction roll 32 is embodied in a plurality of parts, wherein the surface of the cylinder jacket is embodied as a separate jacket strip 40, wherein the individual part faces form a detachable part , Each of these jacket strips has a plurality of suction holes (36). At this time, the jacket strip 40 is releasably connected to a cylinder jacket 34 which forms a unique or "inner" suction roll body through a suitable threaded engagement, respectively, 0.0 > 34 < / RTI >

At this time, the jacket strip 40 forms a suction pattern that matches the function by appropriate positioning and / or dimensional design and / or structural selection of its own individual suction hole 36 or suction slot, It is matched to the individual processes and requirements of the process. For example, the jacket strip 40 may be embodied as a so-called suction strip, which has a suction bore substantially and fixes the beginning of the individual section of the fabric section when processing the pulp product. Alternatively, however, the jacket strip 40 may also be embodied as a so-called folding strip, which has a combination of suction and suction slots and fulfills the function of securing the fabric section when folded or folded, As a result, in this embodiment a new front edge of the fabric section is formed after folding.

As indicated by the arrow 42, as the suction 32 slides over the hollow cylinder 2 when assembling the suction roll system, the hollow cylinder 2 is inhaled as a result of the suction roll system being mounted, So that it projects into the roll 32. At this time, on the front side, the suction roll 32 is fixed to the contact surface driven by the drive motor 8 at the assembling end 6. When the suction roll system 1 is in operation, the contact surface 43 is transferred to a rotational movement about the longitudinal axis of the suction roll system, so that the suction roll 32 with this contact surface also corresponds to its longitudinal axis And is rotated about the center. For the support action, the suction roll 32 is supported on a sliding support ring 44 mounted on the hollow cylinder 2 at the end side on its side. This substantially implements a "flying support" of the suction roll 32, in which case substantially the support force is received through the sliding support ring 44 mounted on the end side. Another guide bolt 45 is disposed at the free end of the carrier shaft 9 for further guidance and stabilization as necessary and the guide bolt is provided in the cover 38 at the inner center, And are coupled into corresponding recesses that are not.

The distributor jacket 30 incorporated within the cylinder jacket 34 of the suction roll 32 is penetrated by a plurality of distributor channels 46. Each distributor channel 46 leads from the assigned folding strip 40 to the output side, i. E. Towards the area of the outer surface of the cylinder jacket 34, thereby forming a suction bore < RTI ID = 36). Thus, each distributor channel 46 is in the mounted state, on the one hand, on the suction bore 36 of the suction roll 32, which is assigned to this distributor channel, and on the other hand inside the cylinder jacket 34 A gas-side connection portion or a pressure-side connection portion is formed between the spaces.

In the state in which the suction roll system is mounted, that is, when the suction roll 32 provided with the distributor jacket 30 on its inner side slides on the hollow cylinder 2, the suction roll 32 and the suction roll 32 When the inner opening of the distributor channel 46 is caused to pass over one of the control slots 22 as a result of the distributed distributor jacket 30 being rotated about the hollow cylinder 2, The pressure side connection of the vacuum system 14 and the individual suction holes 36 is effected. In this case, a pressure side connection is made between the inner space 10 of the hollow cylinder 2 and the suction hole 36 connected to the individual distributor channel 46 from the outside.

2, the distributor channels 46 each have a cross-section that extends from the interior to the exterior, in which case the distributor channel 46 is in communication with the distributor jacket 46. As shown in the cross- And a transversely extending transverse section of the suction roll 32 at the outer surface of the suction roll 30. At this time, the distributor channels 46 have been dimensioned and dimensioned to be connected to one or more of the suction holes 36 in the longitudinal direction - depending on the purpose of use provided, respectively.

The suction roll system thus forms a drum system supported in a flying manner in which the vacuum and ventilation conditions are imparted to the suction bore 36 by the suction roll 32 due to the shape as described above of the distributor channel 46, In the radial direction. The individual rows of suction bore 36 for the product section that extend transversely across the width are powered via the channel system by the distributor channel 46 which is connected to the original exterior of the suction roll 32 Lt; RTI ID = 0.0 > 30 < / RTI > Thereby, the outer surface 50 of the distributor jacket 30, when viewed schematically, forms the second plane of the channel guide portion. This second plane communicates with the input opening 52 disposed on the inside via the distributor channel 46 at the vacuum and exhaust side and these input openings are connected to the inner surface 54 of the distributor jacket 30 in the third plane As shown in FIG. At this time, the input opening 52 can be variably arranged so that its position, when viewed in the longitudinal direction of the suction roll 32, is selected irrespective of the associated suction bore 36; At this time, the connection between the separate input opening 52 provided on the vacuum side or the exhaust side and the suction bore 36 assigned to this input opening is achieved through a suitable channel guide of the distributor channel 46. The discrete input openings 52 are arranged in a hollow cylinder 2 which is positioned inside to act as a control body or control flange to match the assigned control slot 22. At this time, the individual control slots 22 are selected and dimensionally designed, as viewed in the circumferential direction of the roll, in accordance with the desired control time for that suction bore 36, in relation to the starting and ending points and length.

The individual control slot 22 is surrounded by a raised bead-shaped frame, which separates the vacuum area from the area ventilated by the atmosphere.

The suction roll 32 or the drum rotates in a contactless manner on the control flange surface formed by the outer surface of the hollow cylinder 2, together with the distributor jacket 30 disposed in the suction roll or drum on the inside.

Depending on the shape of the channel guide portion, and in particular of the distributor channel 46, a relatively uniform and short channel cross-section is obtained over all the suction rows formed by the suction bore 36, whereby a favorable length- / cross- - reaches a ratio. Thus, particularly rapid charge exchange and short switching times can be reached, and also effective volume and dead volume are kept particularly low.

Further, the cylinder jacket 34 is further provided with a cleaning system. This cleaning system is based on the concept of removing particles or material residues that may adhere to the surface with compressed air. For this purpose, the hollow cylinder 2 is provided with a channel for compressed air. This channel for compressed air communicates with the interior of the bore at the output side, and this bore is disposed at the bit-shaped boundary between the vacuum zone and the atmosphere zone, so that compressed air can be provided to the supply channel in the rotating jacket have. In this case, in particular in this intention, the discharge openings are symmetrically arranged on both sides so that the pressure impact on both sides can be moved toward the center of the roll. At this time, the pressure pulse can be generated automatically, in particular synchronously with the system clock or manually.

As can be seen from the folding strips 40 shown in FIGS. 3 and 4, the suction roll system can also be made for a relatively low vacuum level, that is to say a normal pressure And is implemented in the region of the suction hole 36 for slightly lower compression pressure. Thereby, a gas exchange process can be carried out, among other things, keeping the switching time and reaction time particularly short. Even with such a relatively low vacuum level, it is possible to achieve reliable process advances reliably provided that the clamping force required to secure the paper web or material web through the vacuum system 14, particularly at the suction roll 32 The outlet region of the individual suction holes 36 has a suitably formed outer contour.

For this purpose, the suction holes 36 are formed in the cylinder jacket 34 of the suction roll 32 (in other words, in this embodiment, the outer surface is the outer surface of the cylinder jacket 34, (In the individual folding strips 40 forming a partial surface of the cylinder jacket 34) toward the outer surface 60 of the cylinder jacket 34 from the inner surface of the cylinder jacket 34. On the other hand, in one embodiment of the suction roll system 1, which is considered to be unique and progressive, the outer end of the suction hole 36 is configured such that the suction surface 62 is at least partly at its own height, Sectional contour surrounding the support surface 64 located close to the outer surface 60 of the cylinder jacket 34 of the suction roll 32 in relation to its distance from the central axis of the roll 32 . Thereby, the support surface 64 provided for holding the material immediately adjacent to the individual suction surface 62 is positioned, and the material for avoiding deformation such as, for example, wrinkles, Structure and outer contour are formed.

1: Suction roll system
2: hollow cylinder
4: end
6: Assembly end
8: Driving motor
9: Support flange
10: interior space
11: Through hole
12: Vacuum pump
14: Vacuum system
16: end
18: cover
20: Cylinder jacket
22: Control slot
30: Dispenser Jacket
32: suction roll
34: Cylinder jacket
36: suction hole
38: cover
40: folding strip
42: Arrow
43: contact surface
44: Sliding support ring
45: Guide bolt
46: Dispenser channel
50: Surface
52: input opening
54: Surface
60: outer surface
62: suction face
64: Support surface

Claims (11)

1. A suction roll system (1) comprising a cylindrical suction roll (32) rotatably supported,
A plurality of suction holes 36 are provided in the cylinder jacket 34 of the suction roll and these suction holes are selectively connected to the vacuum system 14 individually or in a group manner via a control system , Said control system comprising a hollow cylinder (2) fixedly mounted, the inner space (10) of which is connected to a vacuum system (14) and which projects into a suction roll (32) (20) is threaded by a plurality of control slots (22). The method according to claim 1,
Wherein the control slots (22) each extend in the circumferential direction of the cylinder jacket (34). 3. The method according to claim 1 or 2,
Wherein the suction roll (32) includes a dispenser jacket (30) that is rotatable about a hollow cylinder (2) with the suction rolls inwardly, the dispenser jacket being threaded by a plurality of dispenser channels (46) Suction roll system. The method of claim 3,
Wherein at least some of the distributor channels (46) have a cross-section extending from the interior to the exterior. The method according to claim 3 or 4,
Wherein the distributor channel or each distributor channel has a longitudinally extending cross-section of the suction roll (32) at the outer surface of the distributor jacket (30). 6. A control system as claimed in any one of the preceding claims, wherein one end region of the end regions of the hollow cylinder (2) assigned to the control system is embodied as an assembling end (6), the hollow cylinder Is fixed to the support structure only at its own assembly end (6). The method according to claim 6,
Wherein the suction roll (32) is supported at the assembled end (6) of the hollow cylinder (2). 8. The method according to any one of claims 1 to 7,
And a plurality of jacket strips (40) each having a plurality of suction holes (36), the cylinder jacket (34) of the suction roll (32) being releasably connected to the suction roll body. 9. The method according to any one of claims 1 to 8,
At least some suction holes 36 are formed in the cylinder jacket 34 of the suction roll 32 so as to extend from the inner surface of the cylinder jacket 34 to the outer surface 60 of the cylinder jacket 34, Wherein the suction roll system is configured to have an inlet and an outlet. 10. The method according to any one of claims 1 to 9,
One suction hole 36 or some suction holes 36 have a transverse profile at their outer ends wherein the suction surface 62 is in contact with the outer surface 60 of the cylinder jacket 34 of the suction roll 32 And at least partially surrounds the closely located support surface (64). An apparatus for processing a material web, in particular a paper web or a pulp web, wherein the material web is guided through a plurality of functional rollers, wherein the at least one functional roller is a suction roll system according to any one of claims 1 to 10 1).

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