DE10356037A1 - Corrugated cardboard web cutting device that can be used to make incomplete transverse cuts has knife and counter rollers that are controlled by a control unit so that a counter body and knife are displaced relative to each other - Google Patents

Abstract

Corrugated cardboard cutting device has a knife roller (25), a counter-body support (19) with a counter body (43) that is positioned against the knife roller during cutting and a control unit that controls the rotation of the knife roller and the displacement of the counter body support relative to each other so that a cut with a desired length and spacing from the edge of the cardboard web is made.

Description

The The invention relates to a cutting device for producing cuts and / or slots in corrugated webs.

In Corrugated board systems are laminated on one side or endless tracks produced multi-ply corrugated board and then given in corrugated sheets Format cut. For better utilization of the full width of a Corrugated web is this in longitudinal tracks cut with two different widths, over a switch in two different Levels dissipated and subsequently cut crosswise. When changing the formats to be cut the two partial webs belonging to the different formats do not become cut across before the switch, but only after the switch in generating the cross sections. So that the two endless partial webs after the Format change can be dissipated in different levels, must be centered a connection cut transverse to the transport direction be attached the given length and has a given distance from the edge.

For this purpose, many complicated cutting devices have been designed. One is from the EP 0 468 374 B1 known. In this case, a knife cylinder cooperates with a multi-section counter-body, the sections are individually adjustable, so that the knife of the knife cylinder only selectively interacts with the counter-body sections and thus only at these points creates a cut.

From the EP 0 534 177 B1 is from the 8th and 9 another cutting device for generating cross-sections, which always begin at the edge of the corrugated web. For this purpose, a knife cylinder cooperates with a counter cylinder, on which a widening towards the center of the roller counter body is provided. A disadvantage of this arrangement is that the known cutting device is unsuitable for attaching a cut of a predetermined length to any transverse position on the web of corrugated board.

Of the Invention is based on the object, a cutting device for corrugated webs to create the best possible is simple.

The The object is solved by the features of claim 1. Of the The core of the invention is that one on a knife cylinder attached knife with at least one different or rotatable against body interacts. The counterbody has such a shape that with the interaction of the knife with the opposite body Cut a predetermined length L is generated. Dependent on from the position of the counter body when interacting with the knife cylinder, the position of the produced section, that is the distance of the cut from the edge of the corrugated web.

Further advantageous embodiments of the invention will become apparent from the Dependent claims. additional Features and details of the invention will become apparent from the following Description of four embodiments based on the drawing. Show it:

1 a schematic side view of the so-called dry-end of a corrugated plant,

2 a cross section of a cutting device according to the section line II-II in 1 according to a first embodiment,

3 a perspective view of the knife cylinder and counter-cylinder of the cutting device according to 2 .

4a a cross section along the section line IV-IV in 2 .

4b a plan view of a cut from the cutting device corrugated web,

5a a development of the jacket of the knife cylinder,

5b a development of the jacket of the counter-cylinder,

6 a cross-sectional view corresponding 4 a cutting device according to a second embodiment,

7a a settlement of the knife cylinder according to 6 .

7b a settlement of the counter-cylinder according to 6 .

8th a cross-sectional view corresponding 4 a cutting device according to a third embodiment, and

9 a cross-sectional view corresponding 4 a cutting device according to a fourth embodiment.

The following is with reference to the 1 to 5 a first embodiment of the invention described. A corrugated plant has a well-known machine for producing single-faced laminated corrugated webs, for example, from EP 0 687 552 A (corresponds to US Patent 5,632,850), the DE 195 36 007 A (equivalent to GB 2,305,675 A ) or the DE 43 05 158 A1 is known, which is referred to in the details. In the in 1 on the right edge only partially illustrated Andrück unit 1 a cover sheet is laminated on the single-faced laminated corrugated web and connected to this. It is of course possible to produce in the corrugated board only one-sided laminated corrugated board or more than three-ply corrugated board. A cutting device according to the invention 2 for creating cross sections is in working direction 3 behind the Andrück unit 1 intended. Their structure will be explained in more detail below. Downstream of the cutting device 2 is a slitting / rilling station 4 arranged. Regarding the detail construction of the station 4 will be on the DE 197 54 799 A (equivalent to US 6,071,222 ) as well as the DE 101 31 833 A directed. The Scheid device 2 can also work direction 3 not seen in front, but behind the station 4 be arranged. Downstream of the station 4 there is a switch 5 consisting of a table 6 and across the working direction 3 arranged, individually pivotable paddles 7 behind the Andrück unit 1 still undivided corrugated web 8th in the form of two partial webs 9 . 10 a cross-cutting device 11 respectively. In the facility 11 There are two rotatably driven, superimposed pairs of rollers 12 each having a radially outwardly extending, perpendicular to the direction 3 running knife 13 wear and which for cross-sectioning the partial webs 9 respectively. 10 interact. Immediately behind the cross-cutting device 11 each is a conveyor belt 14 arranged the cut corrugated sheets of a stacking tray 15 supplies.

The cutting device 2 has two opposite, on both sides of the corrugated web 8th arranged, opposite the ground 16 supported side walls 17 . 18 on, which are arranged parallel to each other. In the walls 17 and 18 is a counter-cylinder 19 around a rotation axis 20 rotatably mounted. The rotation axis 20 runs perpendicular to the working direction 3 , The counter-cylinder 19 has axially projecting journals on both sides 21 on, in one in the walls 17 respectively. 18 arranged bearings 22 are rotatably mounted. The counter-cylinder 19 is about a wave 23 with a drive motor 24 for driving the counter-cylinder 19 connected. The drive motor 24 is designed such that any angular positions g of the counter-cylinder 19 can be adjusted quickly.

Above the counter-cylinder 19 is a knife cylinder 25 around a rotation axis 26 opposite the walls 17 . 18 rotatably mounted. Also the knife cylinder 25 has axially projecting journals 27 on, in appropriate camps 28 are stored. Camps 28 are in appropriate guides 29 via pneumatic cylinder 30 vertically displaceable, causing the knife cylinder 25 on the counter-cylinder 19 is deliverable and the distance between the two is precisely adjustable. The axes of rotation 20 and 2 B are parallel to each other and are arranged one above the other in the vertical direction. The knife cylinder 25 is about a wave 31 with a drive motor 32 connected. Both engines 24 and 32 are via Steuerlei lines 33 with a control device 34 connected. The corrugated web 8th is through the gap 35 that of the knife cylinder 25 and the counter-cylinder 19 is limited, passed.

The knife cylinder 25 has a cylinder jacket 36 on. On the knife cylinder 25 is a knife 37 with a cutting edge 38 provided, which is parallel to the axis of rotation 26 runs across the width of the knife cylinder 25 extends and radially relative to the cylinder jacket 36 protrudes. The knife cylinder 25 has a direction of rotation 39 on, which is chosen so that the knife cylinder 25 in the area of the gap 35 in the tangential direction parallel to the working direction 3 the corrugated web 8th rotates. The cutting edge 38 points from the axis of rotation 26 a distance R _S on. The execution of the cylinder jacket 36 is in 5a shown. The cutting edge 38 closes with the side edges 40 an angle b a for which applies b = 90 °.

The counter-cylinder 19 has a cylinder jacket 41 on, whose settlement in 5b is shown. The counter-cylinder 19 is in one direction 42 rotatably drivable, which is chosen so that the counter-cylinder 19 in the area of the gap 35 tangential along the working direction 3 emotional. The cylinders 19 and 25 are thus driven in opposite directions. On the cylinder jacket 41 are several opposite the cylinder jacket 41 radially projecting counter body 43 intended. The opposing bodies 43 have an outer surface 44 on the surface of a circular cylinder of radius R _G with respect to the axis of rotation 20 lies. The opposing bodies 43 are by steeply sloping flanks 45 limited to the outer surface 44 with the cylinder jacket 41 connect. A development of the cylinder jacket 41 is in 5b shown.

The different juxtaposed counter bodies 43 , in case of 5b eight counter-bodies, are in 5b designated G ₁ to G ₈ . In the development, the counter-bodies G ₁ to G _{8 have} the shape of a parallelogram. Every counter body 43 is through an upper boundary edge 46 and a lower boundary edge 47 limited, the ones with the side edges 48 include the same angle b, for which applies b = 90 °. The counterbody 43 is further characterized by two lateral, mutually parallel boundary edges 49 . 50 bounded with the side edges 48 from mating body to mating body include different angles. When passing the two cylinders 19 and 25 the cutting edge acts 38 with the respective counter body 43 along a section line S together, which in 5b is shown extended in both directions. The section line S also closes with the side edge 48 an angle b a for which applies b = 90 °. The various counter-bodies G ₁ to G ₈ have a constant width B ₁ ,..., B ₈ relative to the possible cutting lines S. This is due to the design of the counter-body 43 in the settlement according to 5b as a parallelogram. Each counter body G ₁ , ..., G ₈ is thus assigned a cutting length L, where L ₁ = B ₁ , L ₂ = B ₂ , ... The on the counter cylinder 19 adjacent counter body, z. B: G ₁ and G ₂ , are arranged so far apart from each other that the upper boundary edge 46 G ₂ does not interfere with the lower boundary edge 47 G ₁ overlaps, but there is a gap between them. The section line S thus always runs only on exactly one counter-body. In the case of the counter-bodies G ₄ and G ₈ , the development and plan view are rectangles which extend over the full width of the counter-cylinder 19 extend. These are intended for cuts that run the full width of the corrugated web 8th extend. The upper boundary edges 46 the counter body G ₁ , ..., G ₈ close based on a fictitious, by the axis of rotation 20 running zero line 53 in cross-section predetermined and in the control device 34 stored angles g ₁ , ..., g ₈ . For simplicity, in 4a less than eight counter-bodies 43 shown. The counterbody 43 will be in the area of the gap 35 along a displacement direction 66 moves the direction of rotation 42 equivalent.

The following is the operation of the cutting device 2 described. Suppose it should be like in 4b shown a section 51 or slot with a length L and a distance A, for example, in the working direction 3 seen right edge 52 the corrugated web 8th are generated by the controller 43 First, the counter body G ₁ , ..., G ₈ identified whose width B ₁ , ..., B _{8 of} the predetermined cut length L comes closest. It may also be that the predetermined cutting length L is a maximum length or minimum length. In this case, the lower or higher B _{i is} selected.

After the belonging to the predetermined length L counter body 43 has been identified, becomes the counter-cylinder 19 in the direction of rotation 42 such a procedure that the selected counter body in the working direction 3 in front of the gap 35 that is in 4a to the left of the gap 35 , lies. Subsequently, by the control device 34 the angular position g determines the predetermined distance A for the cut 51 equivalent. Each angular position g is a different distance A from the edge 52 assigned. Various cutting lines are in 5b to the counter body G ₅ exemplified. It is seen that at section line S ₁ of the corresponding distance A ₁ is less than the belonging to section line S ₂ Distance _A2. By the predetermination of the angle g for the cutting line S during the interaction of the cutting edge 38 Any distance A can be adjusted continuously. The cutting line 51 can either be on the right edge 52 begin, an arbitrarily adjustable distance on the right edge 52 or in the extreme case to the left edge 54 pass. The control device 34 calculates the acceleration of the selected mating body 43 for cutting interaction with the knife 37 that the selected mating body 43 in the predetermined angular position g has the same tangential peripheral speed as the cutting edge 38 , It comes thus to a beating cut. The cut 51 is over its entire length L in a single moment by the interaction of the cutting edge 38 with the selected mating body 43 generated in the predetermined angular position g. The cut 51 runs perpendicular to the longitudinal direction of the corrugated web 8th , If the radii R _S , R _{G are} equal, then the cylinders can 19 and 25 be operated at the same angular velocity at the moment of the cutting process. If the radii are different, the angular velocities must be adjusted accordingly so that the tangential velocities of both cylinders in the gap are equal.

The following is with reference to the 6 to 7 A second embodiment of the invention described. Structurally identical parts are given the same reference numerals as in the first embodiment, to the description of which reference is hereby made. Structurally different but functionally similar parts receive the same reference numerals with a following a. The main difference compared to the first embodiment is that both the knife 37a as well as the opposing bodies 43a in the manner of a helix on the cylinder jackets 36 respectively. 41 are arranged. This is evident in the fact that in the settlement according to 7a the cutting edge 38a with the side edge 41 an angle b _a , which is different from 90 °, which is in particular greater than 90 °. For example, in the present case b _a ≈ 96 °. The corresponding counter-bodies 43 are like the settlement according to 7b shows, also at an angle b _a against the edge 40 sloping. In this way, cutting lines S _a , which also include an angle b _a with the edge. By the arrangement so probably the knife 37a as well as the opposing body 43a On helical lines arises the possibility of the corrugated web 8th partially cut through by a pulling cut. This means that the cutting edge 38a with the counter body 43a Initially only one point comes into engagement. In another turn of the two cylinders 19 and 25 the intersection shifts along the desired cutting line and the web is severed. The generated section 51 runs as in the first embodiment perpendicular to the longitudinal direction of the corrugated web 8th and thus also perpendicular to the working direction 3 ,

The following is with reference to 8th A third embodiment of the invention described. Structurally identical parts are given the same reference numerals as in the first embodiment, to the description of which reference is hereby made. Structurally different, but functionally similar parts receive the same reference numerals with a trailing b. The cylinders 19 and 25 have the same structure as in the first embodiment. You can also have the structure as in the second embodiment. Between the corrugated web 8th and the counter-cylinder 19 is an endless belt 55 provided by three deflection rollers 56 is guided, of which at least one by a motor 57 is driven. The belt 55 moves in the area of the gap 35 along a transport direction 58 that the direction 3 equivalent. The belt 55 encloses the counter-cylinder 19 , The knife 37 thus cuts against the belt during the cutting process 55 , This is at the point where the cut is to take place through the counter body 43 , supported. The use of the belt 55 has the advantage that the section of the existing example of steel knife against the existing example of steel or cast counter cylinder 19 softer, causing a blunting of the knife 37 is reduced. The belt 55 can be easily replaced. In addition, by the strap 55 the corrugated web 8th in the area of the cut 51 transported both before and behind it, so that the risk of congestion through the in the corrugated cardboard 8th dipping knife 37 is reduced.

The following is with reference to 9 A fourth embodiment of the invention is described. Structurally identical parts are given the same reference numerals as in the first embodiment, to the description of which reference is hereby made. Structurally different, but functionally similar parts receive the same reference numerals with a c. The knife cylinder 25 has the same construction as in the first embodiment. In contrast to the first embodiment, the counter-bodies are not on a cylinder jacket, but on an endless conveyor belt 59 arranged. The transport belt 59 is formed by three rolls arranged substantially on the corners of an equilateral triangle 60 diverted, at least one of which by a motor 61 is driven. In the place of the counter-cylinder 19 there is a belt 59 touching support cylinder 62 with a smooth, circular cylindrical surface, around the axis of rotation 20 along the turning direction 42 is rotary drivable. The transport belt 59 has a rack on its inside 63 on that in corresponding sprockets 64 on the rollers 60 attacks. The upper boundary edges 46 is like the first embodiment, a position h with respect to a fictitious zero line 53 assigned. The setting of the position h corresponds to the setting of the angular position g. The exact setting of the position h is through the pinion 63 . 64 possible. Otherwise, the cut is made as in the first embodiment. The selection of the counter body G ₁ , ... G ₈ determines the length L of the cut. The determination of the cutting position h determines the distance A of the cut from the edge. It is of course possible, as in the second embodiment, the knife 37 to arrange on a helix and the counter body 43c to arrange a corresponding angle obliquely. This creates a pulling cut. In the area of the gap 35 become the opposing bodies 43c along a displacement direction 65 moved parallel to the direction 3 runs.

Claims (13)

Cutting device which is in a running distance of a corrugated web continuously produced by a corrugated board manufacturing machine ( 8th ) is arranged for cutting and / or slitting the corrugated web ( 8th ), which cutting device comprises a) one about a knife cylinder axis of rotation ( 26 ) rotatably mounted knife cylinder ( 25 ), which is a knife ( 37 b) one driven along a displacement direction ( 65 . 66 ) displaceable, the knife cylinder ( 25 ) arranged opposite counter-body carrier ( 19 ; 59 ), between the knife cylinder ( 25 ) and the counterbody carrier ( 19 ; 59 ) the corrugated web ( 8th ), c) at least one on the counter-body carrier ( 19 ; 59 ) arranged counter body ( 43 ; 43a ; 43c ) for intersecting with the knife ( 13 ) of the knife cylinder ( 25 ) for producing a cut ( 51 ) into the corrugated web ( 8th ) whose length L is determined by the shape of the at least one counter body ( 43 ; 43a ; 43c ) and whose distance A is from an edge ( 52 ) of the corrugated web ( 8th ) by the position of the at least one counter body ( 43 ; 43a ; 43c ) in the direction of displacement ( 65 ; 66 ) is determined at the intersecting interaction, and d) a control facility ( 34 ) for controlling the rotational movement of the knife cylinder ( 25 ) and the displacement of the counter-body carrier ( 19 ; 59 ) relative to each other such that the position of the at least one counter body ( 43 ; 43a ; 43c ) in the direction of displacement ( 65 ; 66 ) during the cutting interaction with the knife ( 37 ) so that's a cut ( 51 ) having a length L and a distance A from an edge ( 52 ) of the corrugated web ( 8th ) arises. Cutting device according to claim 1, characterized in that the counter-body carrier ( 19 ) than about a counter-cylinder axis of rotation ( 20 ) rotatably drivable bearing counter cylinder ( 19 ) is trained. Cutting device according to claim 1 or 2, characterized in that the displacement direction ( 66 ) of the counter-cylinder ( 19 ) the direction of rotation ( 42 ) of the counter-cylinder ( 19 ) about the counter-cylinder axis of rotation ( 20 ) corresponds. Cutting device according to one of the preceding claims, characterized in that the knife ( 8th ) with the at least one counter body ( 43 ; 43a ; 43b ) cooperates intersecting along a cutting line S. Cutting device according to claim 4, characterized in that the width B _i , i = 1, 2, 3, ... of a counter body ( 43 ; 43a ; 43c ) is constant along possible cutting lines S. Cutting device according to claim 5, characterized in that the at least one counter-body ( 43 ; 43a ; 43c ) in development has the form of a parallelogram. Cutting device according to claim 5 or 6, characterized in that a plurality of counter-bodies ( 43 ; 43a ; 43c ) with associated widths B ₁ , B ₂ , B ₃ ... are provided which correspond to frequently occurring cut lengths L ₁ , L ₂ , L ₃ ..., where: B ₁ = L ₁ B ₂ = L ₂ , ... Cutting device according to one of the preceding claims, characterized in that the knife ( 37 ) a cutting edge ( 40 ) having. Cutting device according to claim 8, characterized in that the cutting edge ( 40 ) parallel to the knife cylinder axis of rotation ( 26 ) runs. Cutting device according to claim 8, characterized in that the cutting edge ( 38 ) on the knife cylinder ( 25 ) has the shape of a helix. Cutting device according to claim 10, characterized in that the at least one counter-body ( 43a ) according to the helical arrangement of the cutting edge ( 38 ) on the counterbody ( 19 ) is arranged helically. Cutting device according to one of the preceding claims, characterized in that between the at least one counter-body ( 43 ) and the corrugated web ( 8th ) a driven endless counterband ( 55 ) is arranged. Cutting device according to claim 1, characterized in that the counter-body carrier ( 59) as a powered fastener tape ( 59 ) is formed, on which the at least one counter-body ( 43c ) is arranged.