WO2011121131A1

WO2011121131A1 - Method for continuously producing a rigid corrugated-board web, and corrugated-board formats cut to size from this web during the production thereof, and corrugated-board making installation for implementing the method

Info

Publication number: WO2011121131A1
Application number: PCT/EP2011/055145
Authority: WO
Inventors: Sebastian Buda
Original assignee: Smurfit Kappa Rapidcorr Euskirchen Gmbh
Priority date: 2010-04-03
Filing date: 2011-04-01
Publication date: 2011-10-06
Also published as: EP2555916B1; DE102010014430A1; EP2555916A1

Abstract

During its production, a rigid corrugated-board web (2) is cut into corrugated-board formats (3) by at least one longitudinal severing cut (41, 42) and transverse severing cuts (51), a continuous movement of the web being maintained in the process. In addition, corner-shaping cuts (61, 62) are punched in coordination with the at least one longitudinal severing cut (41, 42) and the transverse severing cuts (51), these corner-shaping cuts removing corner material in the form of punched parts (63, 64) and producing at least one shaped edge of the corrugated-board formats (3). The corner-shaping cuts (61, 62), which, in relation to the web width, are punched one after the other in at least one width position, the at least one longitudinal severing cut (41, 42) and the transverse severing cuts (51) are made in alignment with one another. A corrugated-board making installation (1) for implementing the method comprises a corner shaping-cut punching arrangement (6), which produces punched sections in the moving corrugated-board web (2) in order to produce the corner-shaping cuts (61, 62), and synchronizing control means (75, 76) for synchronizing the production of the transverse severing cuts (51) with the production of the corner-shaping cuts (61, 62).

Description

Process for the continuous production of a sheet-rigid corrugated board web and of corrugated board formats cut to it in the course of their production, and corrugated board production plant for carrying out the method

The invention relates to a method for the continuous production of a flat-walled corrugated cardboard web and cut to this in the course of their production with at least one web-parallel straight longitudinal section and cut straight transverse cross-cuts cut corrugated board, wherein the dried during their production corrugated web while maintaining continuous web travel with the at least one longitudinal separation section and the cross-sectional cuts in accordance with predetermined format width or format length is provided. Such a corrugated cardboard web is produced in one or more corrugations with at least one corrugated paper web which is covered on both sides with a smooth paper web. The invention also relates to a corrugating machine for carrying out the method.

Known corrugated papermaking plants (eg EP 0 541 953 A1) comprise a first plant section which combines single or multi-wall corrugated cardboard of several papers in which at least one paper web is corrugated and glued to at least two smooth paper webs, a second plant section downstream of the production line. at least formed by a heating section, which outputs the dried web of corrugated cardboard moved along the line at a web speed in the production line, another third section downstream in the production line, formed by a longitudinal cutting device and a cross-cutting device for cutting the corrugated board formats with longitudinal sectioning and predetermined widths defining at least one predetermined width Format length determining transverse cutting, a drive and conveyor for continuous web movement issued at the dry end of the heating section corrugated web in synchronization with corrugated board production in the first abutment section; and control means of the corrugating machine comprising means for controlling the cross cutter in correlation with the corrugated web speed. It is a typical feature of the corrugated board presented, at least one with two smooth paper webs on both sides closed or covered wave web having corrugated board, that the corrugated board or the corrugated board is relatively dimensionally stable. Under dimensionally stable is to be understood that the corrugated board as such is non-flexible or Ibrmstabil, so they can not be wound without destroying the W'cllcnstruktur and is only slightly bendable or bendable. The longitudinal cutting device and the transverse cutting device of the generic generation systems are provided separately from one another.

A corrugated board production plant of the known type comprises the usual sections of the plant with known machine stations and aggregates. By means of corrugating rolls, a corrugated paper web is produced under pressure and heat. Glued tip tips are glued to ceiling panels. The result is a single-walled corrugated cardboard. By adding further corrugated and smooth paper web, depending on the stability requirements, multi-corrugated, in particular two- and three-wave corrugated boards are produced. After the bonding process, the single or multi-wall corrugated cardboard is dried in the so-called heating and drawing section. After leaving the heating and drawing section, the corrugated board web is cut into desired formats of specified format width and length. The corrugated web passes, for example, first a cutting machine (longitudinal cutting device), which produces at least one longitudinal cutting in the web running direction. By means of a cross cutter (cross cutter) the formats are cut to the format length. The formats thus obtained in the course and at the same time with corrugated board production are stacked at the end of production of the plant. Conventionally, the stacks of rigid formats formed at the end of corrugated production are packaged and transported to remote manufacturing facilities. There, the formats are singulated and mostly in rotary die-cutting machines (eg US 3 690 199) or flat bed punching machines, which are each set up with a special punching tool, cut at their corners. For this purpose, each flat rigid corrugated board format in the form of a single sheet usually created by means of a so-called Prefeeders for insertion and the punching are supplied. The punched, occasionally accumulating corrugated cardboard formats are then stacked again, packaged and fed to further use. The on the corrugated board by the Longitudinal cutting cuts and the cross-cut cuts produced, to be processed corrugated board formats have a frequently influenced by transport and temporary storage and impaired strength due to moisture. Special requirements exist when the corrugated cardboard material to be punched is relatively hard. In any case, the punching machines are equipped with punching tools and equipment that accomplish the punching of corrugated cardboard of very different, mostly unknown and above all fluctuating, undefined strength. This requires punching tools with relatively complex, specially machined punching contours and additional equipment, which counteract in particular jamming of the corrugated cardboard during punching. According to the format dimensions, the punching machines are particularly adjusted, the setting process and the setting accuracy and consequently the punching quality are affected by the fact that products to be punched in the form of blanks removed from a stack are selectively and so far given discontinuously in the punching machine. When using punch cylinders, which are operated synchronously with the conveying speed, the choice of format lengths is limited. Each format requires an associated special punching tool. It takes time and setup effort to adapt the punching machine on corrugated board formats of different dimensions and set. For the temporary, sometimes insufficiently defined material condition of the corrugated board, the use of suitable punching tools is sometimes only possible by trial and error.

A device known from DE 43 40 985 A1 is designed for operation with a single-sided corrugated board web, that is to say a flexible single-sided web covered on one side, which is to be provided as a separate semi-finished or intermediate product in roll form. The apparatus comprises a rotary die cutter having a punching roll which is stepwise rotationally controllable relative to the passage motion to form selectable length dimensions of the blanks. The punching roller is particularly designed and adapted in such a way that at the same time with one and the same tool blanks from each other and Eckausstanzungen performs. A device according to US Pat. No. 5,052,992 has a flat-bed punch with a single punching device, which at the same time introduces punched and shear cuts in a windable web which is to be provided as a semi-finished product in the form of a roll roll and to be conveyed intermittently. Blanks are processed in gradual operation by shear edges of the blank size determining output. openings separated. Punching for corner punches, which are star or karoförmig must be adapted to the discharge opening.

The invention has for its object to simplify the production of rigid Wcllpap- peformaten with shaping edge punches. The production speed should be high, the manufacturing effort should be reduced to a minimum, the punching should be performed with high quality and the adaptation to corrugated board formats of very different dimensions should be simple.

The objectives of the invention are procedurally achieved in conjunction with the features of the aforementioned method in that in the production of corrugated cardboard drying heat, while in a production line along a web travel continuously moving corrugated web after the drying treatment while maintaining the continuous web travel movement in coordination with the at least one Longitudinal cutting cut and the transverse cutting cuts are additionally punched, which remove corner material in the form of stamped parts and at least one molded corner edge of the corrugated board formats, wherein the Eckformschnitte which are punched in succession in relation to the web width at least one width position in series, the at least one Longitudinal section and the cross-cutting cuts, the latter in accordance with predetermined longitudinal distances along the web running direction in at least one row consecutive Eckformschnit te, aligned with each other. A particularly suitable for carrying out the method according to the invention particularly suitable corrugated board for continuously producing the corrugated web and cut to this in the course of their production with at least one straight longitudinal cutting and straight cross-cut corrugated board formats in conjunction with the characteristics of einggengenigen corrugated boarding plant is that in Bahnbewegungsrichtung behind the heating section a Eckformschnitt-punching device is arranged, which introduces punched into the moving corrugated cardboard web, which produce for forming at least one edge of the corrugated cardboard formats Eckformschnitte remove the corner material in the form of stampings, wherein the control device of the corrugated paperboard production system comprises synchronizing control means for synchronizing the attachment of the cross cutting cuts and the attachment of said corner die cuts. With the method according to the invention and the corrugated board production plant according to the invention, a number of advantages are achieved.

The production of Wc 11 paperboard formats with material-separating edge punches is integrated into the corrugated board manufacturing process. From the corrugated web, punching parts forming corner shapes are cut out punctually and precisely, the corner punching cuts and the cutting of the cross cutting cuts of the associated, separate, independent processing devices being synchronized with one another. The cut-out punched material parts leave recesses or cut-outs that determine the corner shape. From the corrugated board production given, provided with desired Eckformen formats are readily available. A conventional to be connected separate production for attaching corner punches and the associated expense accounts. The punching of the corners of the format by means of the corner die cuts cut in accordance with the invention takes place in the course of corrugated board production. The milieu, namely the location and condition of the corrugated board material after drying, that is, after defined bonding without intermediate influences, is not subject to any undefined change during the application of the corner-shaped cuts, but is standardized for all punching processes. This results in advantages in particular with regard to the production speed and the use of simple, functionally reliable punching tools which can be operated at high speed for the corner molding cuts. Other advantages include the fact that the format dimensions can be changed without the need for elaborate set-up measures while maintaining intended corner shapes even in ongoing production. In addition, corner shapes can be changed simply by punching tools for desired Eckformschnitte can be selected by operating conversion or replacement without special effort. Furthermore, a special utilization of the corrugated board production plant becomes possible. At the same time, different web strands can be produced by utilizing the full width of the web or machine. The web strands can in particular on different format widths, on formats with differently shaped corners and / or for simultaneous production of formats with and without shaped corners. In particular, eliminates otherwise required measures for temporary storage, the special setting of punching machines and logistics between corrugated board and associated punching machines. On the whole, one achieves increased economic utilization, improvement of the production speed, reduction of production-technical expenditure, flexibility for the format and cut conversion as well as high and reliable quality of the punching. To describe the invention, a distinction is made between cutting on the one hand and punching on the other hand. Thus, the longitudinal cutting cuts and the cross-cutting cuts are made free of material punching (separation only by cutting), while on the other hand and separated by the punching material in the form of punched, cut out parts (stampings) is separated.

The corner-shaped cuts can be edge-punching, which form outer corners and / or inner corners as a corner edge on the format edge. Outer corner edges are produced as outer corners by aligning longitudinal cutting cuts and cross-cutting cuts produced with separate processing devices to one another in order to intersect or intersect at or in the region of the corner punching to be produced. Inner corners can be simply or repeatedly attached to at least one Formatrand determined by longitudinal cutting and / or cross cutting cut, the Eckformschnitte, the at least one longitudinal separation section and the cross cutting cuts are aligned and thus relative to each other so that the transverse cutting cuts each at least one Eckformschnitt, not from a longitudinal cut is cut, cross. Instead or in addition, it is provided that the at least one longitudinal separating cut crosses corner-shaped cuts which are attached at the predetermined longitudinal distances and are not cut by transverse cutting cuts. Inner corner producing corner form cuts form on the format edge, for example, at least one projection or cutout such that, for example, a tab, a factory edge (attachment panel) or nose is formed.

Preferably, the corner pieces which cut out the pieces of material are punched before the at least one longitudinal cutting cut and the transverse cutting cuts are carried out. It is expedient to use at least one corner-molding punching device as the first machining tool. direction behind the heating section and preferably as the only between this and the subsequent, independent longitudinal cutting device. In this area, the continuous corrugated board web is still completely unprocessed and unaffected. The punches are placed in completely closed track area. In the course of the drying treatment following running distance, namely in the area behind the heating section, the continuously running corrugated board web still has considerable heat. It has been found that the punching of the corner molding cuts in this heat range, with, for example, a common temperature of about 60 ° to 80 ° C is generally particularly advantageous. In the heat area and a corresponding local area, the corrugated board web has already dried, in which case a defined / stabilized residual moisture is present in particular. The denominated corrugated board has there a uniform defined consistency.

Advantageously, with the same punching part (material part) forming corner punching four Eckformschnitte be punched, which form the outer corners corner edges of four adjacent corrugated board formats. For this purpose, a four-cutting punching tool may be provided, which is associated with a longitudinal cutting section of the longitudinal cutting device which divides the web of corrugated cardboard in the longitudinal direction into adjacent web strands, which can each be separated into corrugated board formats by means of transverse cutting sections of the cross cutting device. In particular, in combination with the Eckform-punching for four Eckformschnitte a stamping part forming corner punching can be carried out, which forms two corners of the outer corrugated edges of adjacent corrugated board formats. The corrugating machine is then set up with a two-punch die punching only two corner cuts of adjacent corrugated board formats.

Although a longitudinally undivided corrugated board web can also be processed for the production of the format with Eckformschnitten, it is particularly advantageous and economical that at least two web strands can be provided with Eckformschnitten. It is expedient to insert at least three punches producing the corner-molding cuts in a punching transverse line which extends parallel to the direction of the cross-sectional cuts determining the format lengths, whereby at least two web-strands are formed, each of which is arranged in successive corrugated cardboard. formats are separated. The biscuit cutting Stan / .cinrichtung then expediently has at least three punches, which are for punching the Eckformschnitte in one of the three tools common, associated cross-sectional cuts corresponding punching transverse line.

A preferred method measure is that the corrugated cardboard web is moved at least substantially at a constant web speed. To set the Eckform-punching to desired format length and synchronize with it, the invention provides particularly advantageous that at a measuring point the web length is measured ge, with the corrugated web passes the measuring point, and that the Eckform-punching in series after Measure repeatedly measured web length to be performed, which is specified according to the desired format length. Advantageously, the web length measurement is performed in the area in front of the Eckformschnitt- punching device, wherein it is further advantageously provided in a length range of about 0.5 to 3 format lengths in front of a punching line Eckfenschnitt- punching device.

When operating with special measures to keep the web speed constant, the corner punched punches can be controlled in addition to the operational control in accordance with set time intervals, which then correspond to the spacing of the Eckformschnitte along the corrugated cardboard web. Optionally, the setting of time intervals for synchronizing the cross cutting cuts can be used with the Eckform- punchings. A preferred method measure is that along the web running direction successive Eckformschnitte be used as registration marks for controlling the format lengths determining cross-cutting cuts. Advantageously, the registration mark control can additionally be carried out in combination with the track length track measurement and / or with the timing for synchronizing the corner die cuts and the cross cutting cuts. One achieves in combination a desired and actual control, which particularly favors the point or line-exact attachment of the cross-cut chute, in particular when the path length between the Eckform-punching and the cutting of the cross-cutting line is considerable, namely, for example, at least five format lengths and more, wherein the longitudinal cutting device is arranged in this area or the at least one longitudinal section is carried out in this area. The register marks are detected by a suitable sensor which is connected to the control device, wherein the passcode detection is advantageously carried out in the region in front of the cross-cutting device, eg. B. in the path range of 0.5 to 3 format lengths. The registration mark control is part of the synchronization control means.

Depending on the shape of the Eckform-punching, but also in general, a particularly advantageous measure is that each Eckform- punched over a running in the web direction punching section is performed such that the punching takes place in the web running direction with a web speed corresponding speed component. A control measure may consist in that the position of the Eckformschnitts is adjusted along the web width and with this setting, the setting of the associated width position of the format width determining longitudinal separation section is controlled. The corrugating machine is then expediently set up in such a way that the synchronization control means comprise a longitudinal cutting control which controls the longitudinal cutting device for the associated application of a longitudinal cut in accordance with the width position of web-shaped corner molding cuts set in relation to the web width.

Advantageously, at least one Eckformschnitt-punching device in an area free of cutting devices between the second plant section and preferably the longitudinal cutting device, or even the cross-cutting device, be arranged with punches or sections are provided in regions corresponding to each other separately. A particular embodiment of the corrugated board production plant according to the invention consists in that the Eckformschnitt-punching device comprises a over the width of the corrugated cardboard sheet extending guide means and at least one arranged thereon, at least one punching tool having punching unit, the longitudinal advantageous the corrugated board web width can be slidably guided and fixed in the desired width position with respect to the corrugated web width can be fixed. With this design, one achieves a modular design. This means that the or each punching unit and the arrangement of punching units can be assembled and set up according to the desired application design with modular elements. The punching units can be equipped with individual punching tools and associated with each separate punch drive. By dividing and dividing the punching device into the modular units, bodies or masses of the punching device to be moved are reduced during punching. As a result, operation with large punching speeds is enabled.

An embodiment of the punching unit or each punching unit is that it comprises at least one punching tool which is arranged on an associated, forming part of the punching unit rotational body which is rotatable about a tool axis of rotation which extends parallel to a punching transverse line, which corresponds to the direction of the associated cross-cutting cuts.

Tools and drives form components that can be individually assembled and set up to meet the requirements of a product order. Both in modular design, as well as all Eckform punching can be executed with the same Eckform cut or set up.

The at least one punching unit or each punching unit can expediently be set up with a rotary drive which rotates the tool rotating body about the tool axis of rotation. In a preferred embodiment, the control device comprises

A corrugator producing a rotary drive controller that controls the rotary drive of the tool rotating body so that the rotational speed of the punch during the punching process corresponds to the corrugated web speed and includes adjustment means by which the rotational speed at which the punch moves outside the punching process is, to adjust to or for adjusting the format length changeable and adjustable. A peripheral speed of the punch, which is greater than the web speed, belongs to a format length which is smaller than the circulation path of the punch, while returns to a format length arbitrarily larger than the tool circulation path, a peripheral speed is less than the web speed. The setting may also be such that the peripheral speed corresponds to the web speed. The circumferential path of the punching tool then corresponds to the format length. The control of punching tools may be such that they come to a standstill between punch cuts. The aforementioned peripheral speeds are then to be understood as average speeds.

In the above-mentioned and still other advantageous and advantageous embodiments of the invention, subclaims are directed. Features of the embodiments contribute in any combination to the essential solution according to the invention, so that it is not limited to a specific embodiment described, but also every significant individual measure of a specific embodiment is independent of protection based. Each partial feature of an exemplary embodiment is to be understood as a partial feature of further embodiments not shown. Ledigleich particularly expedient and advantageous embodiments and possibilities of the invention will be described with reference to the following description of the embodiments illustrated in the schematic drawing. Show it

1 shows a longitudinal view of a corrugated board production plant according to the invention,

2 shows an enlarged view of an area in which a Eckformschnitt-punching device and a longitudinal cutting device are arranged,

3 is an enlarged view in oblique view from above of the Eckformschnitt-punching device and the longitudinal cutting device,

Fig. 4 in an enlarged view a view of Eckformschnitt- punching device at its outlet side and 5 shows an enlarged view of the longitudinal cutting device on her

Outlet side. 1 to 5 show a corrugated board production plant 1 according to the invention in which a corrugated board web 2 extends along the corrugated board production plant 1 in a production line. To simplify the illustration, machine frames or frames are not shown, and also components of bearings which are arranged on the viewer facing the longitudinal side of the system are cut away.

Along the production line, the corrugated board production plant comprises a first plant section 100, in which the actual corrugated board production is carried out, a second plant section 101, which forms a heating and drawing section, and a third plant section 102, which is equipped with independent, separate processing devices, namely the second Plant section 101 below first with a Eckformschnitt- punching device 6 according to the invention, then with a longitudinal cutting device 4 and subsequently at the end of the production line with a cross-cutting device 5. The longitudinal cutting device 4 and the cross-cutting device 5 are known per se as such, as far as the corrugated cardboard web 2 gera - the cut at right angles intersecting cutting lines without punching material, split to obtain corrugated board formats 3 from a non-wound corrugated board web. The corrugated board formats 3 are stacked in a stacking device 15 at the end of the production line. The corrugating machine 1 further comprises a control device 7, which controls the entire operation of the corrugated board 1. Specifically, as shown schematically, a drive and conveyer 12 constituting the portion 101, the corner punching punch 6, the slitter 4, and the cross cutter 5 are controlled to coordinate the operation of these devices. This control may also include feedback from the controlled devices, as shown by double arrows of control lines between the controller 7 and said devices. The control device 7 and its controls, control sections or control means, which are still in be explained hang are formed by today's usual electronic and / or mechanical devices. In particular, a processor-equipped computer, operated with appropriate programs and tuned to the products to be produced, monitors and controls the entire corrugator. Such controls, which are known as such, are not the subject of the present invention, so they are not described in detail.

The first plant sections 100 is shown only in the form of a dash-dotted rectangle. These are the usual aggregates of a corrugated board production plant. There, at least one paper web is corrugated by first, in order to give it the required elasticity, first heated and moistened and then passed under pressure and heat action between tooth-like intermeshing corrugating rolls. The corrugation of the rollers determines the wave shape and thus the wave types, which are defined according to wave height and width. The corrugated paper is provided with glue at its wave tips and glued with a smooth cover sheet made of paper. Single wall

Corrugated board is created by adhering a second cover sheet to the other side of the shaft. Depending on requirements, further corrugated and / or smooth paper webs can be added to produce multi-corrugated, in particular two and three-wave corrugated cardboard. After the said process, the single or multi-corrugated corrugated cardboard web 2 succeeded in the second plant section 101. The corrugated board web 2 is dried in the heating and drawing section of this section. The known heating section 1 1 is shown only with circulating wipes, between which the corrugated cardboard web 2 is conveyed through. The pulling section comprises the drive / conveying device 12, which is equipped with traction rollers 121 which are driven by a rotary drive 120 shown in phantom and which convey the corrugated cardboard web 2 between them. This drive / conveying device 12 forms the main drive for moving the corrugated cardboard web 2 along the production line on a web travel path 20 parallel to a machine longitudinal axis 103 and formed and determined by web tables 14 lying in a horizontal plane.

The production of the corrugated cardboard web 2 in the first plant section 100 can, regardless of the basic measures described above, take place in any desired manner, and also the heating and pulling section can be designed in a variety of ways. According to the invention, the arrangement or operation of the Eckformschnitt- punching device 6, which is provided in the production line downstream of the second plant section 101 between this and the arranged at the output of the production line cross-cutting device 5 is important.

The longitudinal cutting device 4 comprises a downstream station 401 in the web running direction 200, which as a whole is equipped with three circular cutting blades 44. In the exemplary embodiment, a rotating, a center blade 442 forming circular cutting blade 44 of the longitudinal cutting device 4 is set and operated so that the continuously moving from the drive / conveyor 12 along the web travel path 20 in the web direction 200 corrugated web 2 centered in two identical web strands 201, 202 is disconnected. Outer or edge blades 441 are arranged and arranged at the same transverse distance from the center blade 442 such that they cut off from the free longitudinal edges of the web strands 201, 202 each have a cut portion 65 in the form of an edge strip, as shown in particular in FIGS. 2 and 5 is. The center knife 442 produces a web-parallel longitudinal cutting section 42 in a straight line, and the edge knives 441 produce longitudinal cutting cuts 41 parallel to the edge of the corrugated cardboard. In the exemplary embodiment, the knives 44 of the station 401 are connected by means of a drive shaft about a common axis of rotation perpendicular to the machine longitudinal axis 103 40 rotatable. The rotary drive is effected by means of a rotary drive 43 shown in phantom only in FIG. 1. In the exemplary embodiment, each cutting blade 44 is mounted on an associated slide 46. Each carriage 46 is suspended on a guide 45, which is formed for example by a rail guide shown with two parallel, perpendicular to the machine axis 103 rods. At these rods, the carriage 46 are slidably guided and held in position adjustable.

The figures show another station 402 of the slitter 4 above station 401. This station is formed in correspondence with station 401 and is shown with offset disk-shaped circular cutting blades. The stations 401, 402 may be operated alternately or simultaneously. They can with the same, unrotated in the direction of rotation axis cutting blades or, like shown, equipped with offset cutting blades and operated. Positions may be pre-set, so that it may not be necessary to move and / or to change the distances in the stations. The cross-cutting device 5 is equipped with a pair of knife rollers 54, 55, between which the corrugated cardboard web 2 driven hi and thereby provided with the machine longitudinal axis 103 and the web edges perpendicular cross-sectional cuts 51, which are cut in a straight line. The knife rollers 54, 55 are rotated in opposite directions by means of a drive 51 shown only in phantom. The cross-cutting device 5 can be designed in any other suitable manner for producing straight transverse cutting cuts 51.

The third plant section 102 may include additional per se known cutters, namely, for example, a short cross cutter 16 which may be set up and operated to cut flaws from the corrugated web during production.

According to the invention, the corner-cut cutting device 6 in conjunction with the longitudinal cutting device 4 and the cross-cutting device 5 is of major importance. For this purpose, the longitudinal cutting device 4 with arrangement, device and operation of their cutting blade 44 is adapted to the Eckformschnitt-punching device 6. Also, as will also be explained below, 5 special means for common, synchronous operation of the Eckformschnitt-punching device 6 and the cross-cutting device 5 are provided and used.

The corner shape-cutting punching device 6 according to the invention is arranged in the region between the second plant section 101 and the longitudinal cutting device 4, namely at a greater distance from the output or the draw rolls 121 than from the longitudinal cutting device 4. The corrugated cardboard web 2 remains after leaving the second plant section 101 to about two-thirds of the railway line between the second plant section 101 and the longitudinal cutting device 4 of a processing free. The then taking place before the slitting and cross cutting processing is done by the Eckformschnitt-punching 6th The Eckformschnitt- punching device 6 comprises three punching units 610, 620, which are arranged above the Laufweg- or the corrugated cardboard web width with equal transverse distances. Each web edge is associated with a punching unit 610, while in the middle region of the corrugated cardboard web 2, the third punching unit 620 is arranged. The punching units 610, 620 are basically the same. Each punching unit 610, 620 comprises a rotatable circular disk-shaped rotary body 9, a rotary drive 91 and a slide 92 which supports and holds the rotary body 9 and the rotary drive 91. Each rotary drive 91 may be formed by, for example, a controlled servomotor and a servo gear. The three rotary bodies 9 are all arranged rotatably about one and the same tool rotation axis 90. The tool rotation axis 90 extends parallel to a punching transverse line 60 which corresponds to the directional course of associated transverse cutting cuts 51, that is to say being aligned parallel to the cutting line of the transverse cutting device 5 which produces them.

In the exemplary embodiment, each carriage 92 is suspended on a guide device 8, which is formed by two parallel rods perpendicular to the machine longitudinal axis 103, which extend across the width of the web travel path parallel to the punching cross-60 and fixed end to a frame, bearing walls or frames are. The slides 92 are slidable along the rods in their transverse position, adjustable and fixable. Special means for setting and setting are not shown. Such remedies can be varied. Adjusting means / locking means may be provided which can only be operated by hand or those which can be operated by machine. Suitably, the web width is associated with a scale, not shown, which serves as a distance-AWegmaßstab for adjusting the position of each punching unit over the web width. Carriage and / or guide device can also be designed very different. It is essential that the or each punching unit can be adapted to the positions of the Eckformschnitte. The rotary body 9 of the center station 620 is provided at its periphery with a four-cutting punch 602. This tool punches after each full revolution of the rotary body 9 a star or karoförmige punching in the corrugated cardboard web 2, so that a correspondingly shaped punched-out material part, namely a Stamping 63 is formed (Fig. 4). In the exemplary embodiment, the punching tool 602 according to the star shape four pointed cutting edges (tips) and these connecting, outwardly concave cutting sections. Correspondingly, four outer corner-forming round corner-shaped cuts 62 are punched, with two opposite cross-cutting tips of the punching tool 602 being aligned corresponding to the punching transverse line 60 and thus parallel to the later cross-cutting cuts 51, while the two other longitudinal cutting tips correspond in the direction perpendicular to the punching transverse line 60 are aligned with the longitudinal separating section 42. The rotary bodies 9 of the outer punching units 610 have the same diameter as the rotary body 9 of the punching unit 620. Instead of the four-cutting punching tool, a two-cutting punching tool 601 is formed, which corresponds in half to the four-cutting punching tool 602, so that it has a wing-like shape with converging in a cross-cutting tip punching / cutting edges which, facing away from the edge of the corrugated cardboard web 2, are concave , As a result, with each punching, the two-punch dies 601 punch two corner die cuts 61 corresponding to two corner die cuts 62 and forming therebetween a punched part 64 in the form of a star half of the die 63 (FIG. 3). In the exemplary embodiment, the punching device 6 is equipped with a counter roller 600 extending over the width of the table. The punching tools 601, 602 work against a smooth-surfaced, optionally raised, counter-pressure force adjusted and tuned roller peripheral portion 603. Accordingly, an unillustrated rotary drive is provided which rotates the counter-roller 600 synchronously with a peripheral speed or the tool speed corresponding peripheral speed. Another embodiment, not shown, is that instead of the uniform mating roll, an arrangement is provided which is modularly divided into the punching tools 601, 602 and the punching units 610, 620, respectively, with each countermolding body synchronized with the associated punching tool slidably and optionally rotatably arranged.

It can be seen that the corner-shaped cuts 61, 62 are all the same, namely in the exemplary embodiment the same round, convex-shaped corner edges of corrugated cardboard formats 3 manufacture, wherein the corrugated board formats are cut only after the attachment of the Eckformschnitte 61, 62 with the longitudinal cutting device 4 and the transverse cutting device 5. The longitudinal cutting device 4, the cross cutting device 5 and the corner cutting cutting device 6 are set and operated such that the longitudinal cutting tips of the tools 601, 602 are aligned with the longitudinal cutting sections 41 and the longitudinal cutting section 42, while the transverse cutting tips of the punching tools 601, 602 are aligned with the transverse cutting 51.

The disc-shaped rotary body 9, together with the punching tool arranged thereon, forms a mass-reduced component which can be operated at relatively high speed, wherein acceleration (starting) and deceleration (braking) can be carried out satisfactorily. For example, the corrugator may operate at 200 feet per minute and more. The modular construction is with particular advantage preferably also such that the punching dies, namely the punching tools 601, 602 can be mounted interchangeably on the rotating bodies 9. For example, the punching tools 601, 602 may be formed by tool rings or rings, not shown, which form a rotary body together with a core body as a shell body. For example, punches equipped with at least one punch may be interchangeably bolted to the core body. The punching form can be chosen arbitrarily. Instead of the described circular punching tools 601, 602 punching tools can be provided, for example, with rectangular, circular, diamond-shaped and / or trapezoidal cutting.

Using the described corrugated board production system 1 according to the invention, the method according to the invention for continuously producing the corrugated cardboard web 2 and the corrugated board formats 3 cut to it in the course of their production is carried out by feeding into the continuously moving corrugated cardboard web 2 after drying treatment while maintaining the continuous web travel movement Co-ordinating with the longitudinal cutting cuts 41, 42, the corner molding cuts 61, 62 are punched, in addition to the straight longitudinal cutting cuts 41, 42 and the straight transverse cutting cuts 51. The coordination of the cuts can For example, be done by first the positions of the Eckformschnitte 61, 62 are set along the web width and with this setting the adjustment of the associated width position of the format width determining longitudinal separation section is brought into line. This setting can be controlled automatically by means of the control device 7.

The control device 7 controls and synchronizes the movement sequences over all devices. The control device 7 also includes its associated, associated with the operation of the system control means.

In the exemplary embodiment, the control device 7 comprises a synchronization control means 764 which detects the positions of the rotary bodies 9 or the punching tools 601, 602 and controls, for example, electromechanical drive and adjustment means for positioning the cutting blades 44, not shown. Similarly, it is conceivable that the positions of the cutting blade 44 are adjusted and the tool rotation body 9 are positioned by means of appropriate control and adjusting means.

A drive controller 71 and control means 761 ensure that the rotary drive 120 of the drive / conveyor 12 is optimally operated in coordination with the operation of the first system section 100. The rotary drive 120 is set to continuous and expedient in particular at least substantially constant operation. The Eckform-punching are carried out at defined local and / or time intervals, so that the Eckformschnitte 61, 62 are produced in rows in the embodiment with a uniform format length. In the exemplary embodiment, the tool rotational drives 91 of the corner-shape cutting punching device 6 are uniformly and consistently controlled by means of a drive device 910 and an associated punching control 76 of the control device 7. The control is such that the punching tools 601, 602 are operated at the same time and place. Each Eckform- punching is carried out over a extending in the direction of web travel 200 punching section SA such that the punching in the web running direction 200 with a speed corresponding to the web speed component takes place (Fig. 3). This means that in the phase of the punching section SA, the peripheral speed of the rotary bodies 9 or of the punching tools 601, 602 is synchronized with the path speed. is chronized. For this purpose, the control device 7 comprises a rotation drive control 716 connected between the drive control 71 and the punching control 76. The punching control 76 also comprises adjustment means with which the rotational speed of the tool rotation bodies 9 is adjusted in relation to the web speed between successive corner punching cuts. A peripheral speed of the rotary body 9 or the punching tools 601, 602, which is greater than the web speed, results in a format length which is smaller than the circumference of the punching tool. Incidentally, format lengths equal to or larger than the tool revolution path can be set.

In the exemplary embodiment, the punching control 76 is connected to a length measuring device 77 shown only in FIG. The length-of-time device 77 is advantageously arranged between the plant section 101 and the corner-cut cutting device 6 free of other stations or devices between the device 6, 77 and the section 101. The length measuring device 77 forms a, for example, the top of the corrugated board 2 associated measuring point for measuring length, ie distance, with which the moving web 2 passes the measuring point. The measuring length used for control is determined according to the desired format length. Each time the length measurement detects the passage of the corrugated board web having the predetermined length, the corner punch cutting device 6 performs the punching due to control by the punching control 76. The length measuring device 77 may be formed, for example, by an impeller engaging the corrugated cardboard web 2 and moving with it, whose running angle is detected by the punching control 76. Any other, in particular optical length measurement can be provided.

Furthermore, in the exemplary embodiment, the control device 7 comprises a synchronization control means 75 for cross-cutting control, which is connected to a registration mark control. This has a registration mark sensor 781, which is arranged in the production line in the example behind the longitudinal cutting device 4 in the area in front of the cross-cutting device 5. The registration mark sensor 781 detects at one Web edge, the occurrence of the series in succession Eckformschnitte 61, where it can be set, for example, to recognize the Eckformschnitten 61 common cross-cutting tip. The synchronization control means 75 controls the cutting drive 53 of the cross-cutting device 5 so that it performs each cross-cutting cut 51 precisely with the cross cutting tips of the respectively successive Eckformschnitte 61, 62 in passing them.

The timing of the transverse cutting cuts 51 takes place in correlation and synchronism with the continuous movement of the corrugated cardboard web 2 as a function of its speed. Accordingly, the stacking device 15 is operated for stacking cut-off formats 3. The drives 91 of the tool rotation body 9 and the rotary drive 43 of the longitudinal cutting device 4 are controlled by means of the control device 7 in coordination with each other. For controlling the cross-cutting cuts 51, in the embodiment in combination with the register mark control, synchronicity with the operation in the corner shape cutting punch 6 is produced by the predetermined length measured successively with the length measuring means 77 both the corner punch 6 and the cross cutter 5 via the synchronization control means 75. The control device 7 may also, as shown in FIG. 1, comprise a synchronization control means 765, which then uses, at constancy-controlled web speed, time intervals set to execute the corner die cuts to control the cross-cut cuts 51. The described track length measurement control, which is unaffected by changes or irregularities in web speed, is preferred.

The marginal longitudinal parting cuts 41 are aligned with the longitudinal cutting tips of the Eckformschnitte 61. As can be seen in particular from FIG. 5, the punched part 64 (FIG. 3) is detached by this cut, and this and a strip cut part 65 cut off by the longitudinal cutting cut 41 are collected in a collecting container 131. As shown in Fig. 4, and the punched parts 63 are collected, in a container 132. The container 131 and the container 132 are part of a collecting and suction device 13. This includes not shown suction means, the punched and cut parts for Aspirate the intake in the containers. Any other suitable design is possible. For example, a conveyor belt may be provided which receives the stamped parts and in particular transports them to a central exhaust.

In the exemplary embodiment, the corrugated cardboard web 2 is cut into the two same web strands 201, 202 and with equal transverse distances, the three, the circular Eckformschnitte 61, 62 produced as outer corners punching introduced. In particular, with the described modular design of Eckformschnitt- punching device other benefits can be driven on the corrugated board, for example, on a 250 cm wide system with other format widths and possibly additionally installed punching units. The longitudinal cutting device 4 can be equipped with any other number of cutting blades, even with only one cutting blade or optionally operated by selective control. Accordingly, the one or more punching tools of the Eckformschnitt-punching device 6 are established. As a result, the system can be operated with undivided corrugated web or multiple web strands with, as in the embodiment, the same width or different widths. The Eckformschnitt-punching device 6 can also be arranged downstream of the longitudinal cutting device 4. An arrangement between the stations 401, 402 is conceivable. The arrangement described in the area behind the second plant section 101 is given preference. It is also preferred that the length measuring device 77 is arranged in the region in front of the corner punching device 6 without intermediate arrangement of other processing stations.

Instead of or in addition to the outer corners, inner corners can be punched out at the longitudinal edges and / or the transverse edges of the formats. At least one associated punching device is then arranged and controlled so that, in the embodiment, at least one of the three longitudinal cutting cuts the Eckeckrnschnitte forming the inner corners, which are not cut by the cross cutting cuts. Additionally or alternatively, at least one punching device may be arranged and be controlled, that in the embodiment, the cross-cutting cuts Eckformschnitte that form on the transverse edges of the formats of at least one format strand inside corners, wherein such corner shape cuts are not cut by the longitudinal cut sections. All punches for the inner corners are made synchronously with the Wel.lpappebahnlauf and in accordance with the length of the formats.

Claims

Method for the continuous production of a flat-walled corrugated board web (2) and corrugated board formats (3) cut to it in the course of its production with at least one web-parallel straight longitudinal cutting section (41, 42) and transverse straight sections (51), the corrugated board web (2) being cut to size produced with one or more corrugations with at least one corrugated paper web covered on both sides with smooth paper web, dried during its production and following the drying while maintaining continuous web travel with the at least one longitudinal cutting section (41, 42) and the transverse cutting cuts (51) in accordance with predetermined format width ( B) or format length (L) is provided, characterized in that in the production of corrugated cardboard drying heat, while in a production line along a web travel path (20) continuously moving corrugated cardboard web (2) after the drying treatment while maintaining the continuous Bahnlaufb in correspondence with the at least one longitudinal cutting section (41, 42) and the transverse cutting cuts (51), corner molding cuts (61, 62) are additionally punched, remove the corner material in the form of punched parts (63, 64) and at least one shaped corner edge of the corrugated board formats (3 ), wherein the corner-shaped cuts (61, 62) which are successively punched with respect to the web width in at least one width position in series, the at least one longitudinal cutting section (41, 42) and the transverse cutting cuts (51), the latter in accordance with predetermined longitudinal distances the longitudinal direction of the web running in at least one row of successive Eckformschnitte (61, 62) are aligned,

A method according to claim 1, characterized in that the Eckformschnitte (61, 62) are punched before the at least one longitudinal separation section (41, 42) and the cross-cutting cuts (51) are performed. A method according to claim 1 or 2, characterized in that the Eckformschnitte (61, 62) are punched in a heated by the drying region of the corrugated cardboard web (2).

A method according to claim 3, characterized in that in the heated by the drying area only the Eckformschnitte (61, 62) are punched and the longitudinal separation cuts (41, 42) and the transverse cutting cuts (51) are subsequently performed. 5. The method according to any one of claims 1 to 4, characterized in that four Eckformschnitte (62) are punched with one and the same, a punched part (63) forming Eckform-punching, the outer edges of the corner edges (32) of four contiguous corrugated cardboard formats ( 3) form. 6. The method according to any one of claims 1 to 5, characterized in that with one and the same, a punched part (64) forming Eckform-punching two Eckformschnitte (61) are punched, which form two corner edges of adjacent corrugated board formats (3) as outer corners.

Method according to one of claims 1 to 6, characterized in that in a punching transverse line (60) which extends parallel to the direction of the format lengths (L) determining transverse cutting cuts (51), with transverse spacings at least three of the Eckformschnitte (61, 62 ) are produced, wherein at least two web strands (201, 202) are formed, which are each separated into successive corrugated board formats (3).

Method according to one of claims 1 to 7, characterized in that corner molding cuts are punched, which form on at least one edge of the corrugated cardboard inside corners, the Eckformschnitte are each cut only by a longitudinal separation section or a cross-cutting section. Method according to one of claims 1 to 8, characterized in that each Eckform-punching over a in the web running direction (200) extending punching section (SA) is carried out such that the punching in the web running direction (200) takes place with a speed component corresponding to the web speed ,

Method according to one of claims 1 to 9, characterized in that temporal and / or spatial distances corresponding to the predetermined format length (L) are equally used to control the execution of both the corner die cuts and the cross cut cuts (51).

Method according to one of claims 1 to 10, characterized in that at a measuring point the web length is measured, with which the corrugated cardboard web (2) passes the measuring point, and that the Eckform- punchings are carried out sequentially in accordance with repeatedly measured web length, the corresponding desired Format length (L) of the corrugated cardboard formats (3) is specified.

A method according to claim 11, characterized in that the web length measurement is performed locally before the Abrangungsort Eckform- punchings, the web running path between this Anbringsungsort and the measuring point remains free of machining.

Method according to one of claims 1 to 12, characterized in that along the web running direction (200) successive corner shaped cuts (61) are used as register marks (780) for the controlled execution of the format length producing cross-cutting cuts (51).

Method according to one of claims 1 to 13, characterized in that the position of the corner molding (61, 62) is adjusted along the width of the web and with this adjustment the adjustment of the associated width position of the format width (B) determining the longitudinal separation cut (42) gesteu is. Wellpappeer / cugungsanlage (1) for the continuous production of a corrugated cardboard web (2) and cut to this in the course of their production with at least one longitudinal cutting section (41, 42) and transverse cutting cuts (51) corrugated cardboard formats (3) comprising a first, a on or multiwave paperboard web (2) consisting of a plurality of papers assembling section (100), in which at least one paper web is corrugated and glued to at least two smooth paper webs, a downstream in production line second plant section (101), at least formed by a heating section (1 1) which discharges the dried web of corrugated cardboard (2) moving at production speed along a web travel path (20), another third plant section (102) downstream of the production line, formed by a longitudinal cutting device (4) and a cross cutting device (5) for cutting the web Corrugated cardboard formats (3) with at least one specified format width (B) determining straight longitudinal cutting section (41) and predetermined format length (L) determining straight transverse cutting cuts (51), a drive and conveyor (12) for continuous web movement of the output at the dry end of the heating section (11) corrugated web (2) in synchronization with the corrugated production in the first plant section (100) and a control device (7) of the corrugating machine (1), comprising means (75) for controlling the cross-cutting device (5) in correlation with the web speed of the corrugated board, characterized in that the corrugator (1) for carrying out the method according to one of claims 1 to 14 characterized in that in the web movement direction (200) behind the second plant section (101) at least one Eckformschnitt-punching device (6) is arranged, which introduces into the moving web of corrugated cardboard (2) punches, at least for shaping an edge of the corrugated board formats (3) corner-shaped cuts (61, 62), the corner material in the form of punched parts (63, 64) remove, the control means (7) of the corrugating machine (1) synchronization control means (75, 76) for synchronizing the attachment of the cross cutting cuts (51) with the attachment of said corner shape (61, 62). Corrugated board production plant according to claim 15, characterized in that the Eckformschnitt- punching device (6) between the second plant section (101) and the longitudinal cutting device (4) is arranged.

Corrugated board production plant according to claim 15 or 16, characterized in that the Eckformschnitt- punching device (6) has at least one four-cutting punching tool (602) which is associated with a longitudinal separating section (41) of the longitudinal cutting device (4), the corrugated cardboard web (2) in the longitudinal direction into adjacent web strands (201, 202), which are each separable by means of transverse cutting cuts (51) of the cross cutting device (5) in corrugated board formats (3), wherein the four-cut punching tool (602) punched out punching parts (63), the Eckformschnitte (62) form four contiguous corrugated board formats (3).

Corrugated board production plant according to one of claims 15 to 17, characterized in that the Eckformschnitt- punching device (6) at least a two-cutting punching tool (601), each forming a stamped part (64), two Eckformschnitte (61) of adjacent corrugated board formats ( 3) punches.

Corrugated board production plant according to one of claims 15 to 18, characterized in that the Eckformschnitt- punching device (6) has at least two punching tools (601, 602) for punching the Eckformschnitte (61, 62) in one of the two punching tools (601, 602) common, associated cross-sectional cuts (51) corresponding punching transverse line (60) lie.

Corrugated board production plant according to one of claims 15 to 19, characterized in that the corner shape-cutting punching device (6) over the width of the corrugated cardboard web (2) extending guide means (8) and at least one arranged thereon, a punching tool (601, 602) having punching unit (610, 620) slidable along the corrugated web width guided and in the desired width position with respect to the corrugated web width can be fixed.

21. Corrugated cardboard production plant according to one of claims 15 to 20, characterized in that the Eckformschnitt- punching device (6) comprises at least one at least one punching tool (601, 602) having punching unit (610, 620), wherein the at least one punching tool (601, 602 ) is arranged on an associated, forming part of the punching unit (610, 620) rotating body (9) which is rotatable about a tool axis of rotation (90) which extends parallel to a punching transverse line (60) corresponding to the direction of the corresponding transverse mixing point (51) corresponds.

22. Corrugated cardboard production plant according to claim 21, characterized in that the punching unit (610, 620) comprises a rotary drive (91) which rotates the tool rotation body (9) about the tool rotation axis (90).

23. Corrugated board production plant according to claim 22, characterized in that the control device (7) of the corrugated board production plant (1) comprises a rotation drive control (716) which controls the rotation drive (91) of the tool rotation body (9) such that its rotational speed during the stamping process corresponds to the corrugated web speed, and includes the adjustment means by which the rotational speed outside the punching process for adjusting the format length is changeable and adjustable.

24. Corrugated board production plant according to one of claims 15 to 23, characterized in that between the second plant section (101) and the Eckformschnitt-punching device (6) a length measuring device (77) is arranged, which has a measuring point for measuring the web length of the corrugated cardboard web ( 2), wherein the length measuring device (77) via the control device (7) with the Eckformschnitt-punching device (6) is connected. A corrugating machine according to any one of claims 15 to 24, characterized in that the synchronization control means (75) comprise a registration mark control responsive to web-running sequential punched corner cuts (61) as registration marks (780) and the cross-cutting means (5) for manufacturing the cross cutting cuts (51) controls.

A corrugating machine according to any one of claims 15 to 25, characterized in that the control device (7) comprises a synchronization control means (764) which operates in accordance with the width position of web mold in series consecutive corner forming cuts (61, 62) is connected to the longitudinal cutting device (4) for controlling the same.