EP1790444A2 - Cutting cylinder for severing web material - Google Patents

Abstract

Cutting knife (20) has peripheral arranged cutting edge wherein each cutting edge (25) is arranged at a distance (24) to the cylinder axis (3) and in relative position intersecting with the cylinder axis at an angle (beta ). Each of the cutting edges is arranged at varying distance to the cylinder axis.

Description

The invention relates to a knife cylinder for separating web material according to the preamble of claim 1. The knife cylinder comprises at least one knife for cutting, for example for transverse cutting or transverse perforation, of the web material moved in the conveying direction. Paper, corrugated cardboard, plastic or metal foil, fabric material, etc. can preferably be processed by means of the knife cylinder.

A knife cylinder of this kind is made GB 884 194 for separating web material having at least one groove for receiving a knife arranged parallel to the cylinder axis of the knife cylinder. The knife cylinder has a circumferential groove and the groove diametrically opposite to a cylinder axis enclosing cylinder core. Within the cylinder circumference with a theoretical diameter between the groove and the cylinder core extending side surfaces are arranged in the direction of the cylinder axis, which are inclined starting from the cylinder core to the groove. The knife arranged on the knife, especially its cutting edge, is arranged parallel to the cylinder axis.

The arranged on the rotatable knife cylinder knife is assigned in parallel a fixed counter blade, between the two knives, the web material is promoted. Both parallel arranged knives have a plurality of teeth, so that the separating cut of the web material is executed jagged.

Another rotatable knife cylinder is off GB 628 154 known, which has two circumferentially diametrically opposed, the cylinder core enclosing grooves for receiving a knife each. Starting from the cylinder core, the side surfaces are inclined in the direction of the grooves. The am rotatable cylinder arranged knives is a rotatable cylinder with circumferentially offset 180 ° and arranged parallel to the cylinder axis grooves, between the two cylinders, the web material is promoted. The respectively arranged on the knife cylinder knife, especially the cutting edge, is arranged parallel to the cylinder axis. When both cylinders rotate, one of the knives on the knife cylinder dips into one of the grooves of the associated cylinder, so that a separating cut is realized.

Out DE 33 03 628 C2 a knife cylinder is known which has at least one groove for receiving a knife arranged substantially parallel to the cylinder axis for separating the moving web material. This knife cylinder further comprises over the length of each knife distributed arranged pressure cylinder for non-positive fixing of the respective knife relative to the knife cylinder. The one groove for receiving a knife is arranged on the cylinder circumference of the knife cylinder or a plurality of grooves for receiving the respective knife on the cylinder circumference of the knife cylinder are arranged distributed. In an example according to FIG. 2 arrangement of six grooves on the knife cylinder they are arranged offset by 60 ° on the full circumference of the cylinder.
For higher processing speeds of web material such a design of a knife cylinder is less suitable.

The invention is based on the object to provide a knife cylinder of the type mentioned, which has more favorable mass ratios and is suitable for higher cutting performance and processing speeds of web material.

The object is achieved by the training features of claim 1. Further developments emerge from the dependent claims.

A first advantage of the measuring cylinder is due to the fact that this compared to the known knife cylinders a noticeable mass reduction has or that higher cutting performance and processing speeds can be realized with the knife cylinder according to the invention. The reduction in mass is achieved by arranging inside the cylinder circumference of the knife cylinder with a theoretical diameter between the special knife or the special knives and the cylinder core adjacent the cylinder axis in the direction of the cylinder axis and inclined towards the knives with cutting edges side surfaces. According to the special design of the knives described below, the side surfaces are arranged in particular helically or obliquely inclined to the cylinder axis or to the cylinder core. As a result, the center of gravity of the knife cylinder is always on the cylinder axis and possible imbalances are avoided.

The mass reduction can be additionally improved by the arrangement of communicating with the side surfaces of openings (openings). Upon rotation of the knife cylinder, the openings are then flowed through by the ambient air. Alternatively, instead of the perforations, each side surface can have recesses, for example cut-outs, which are formed by a material removal of the respective side surface. The wells are closed in a training and thus can not be traversed by the ambient air. In a second embodiment, the depressions on openings (openings), which can be traversed by the ambient air.

A further mass reduction can be achieved by the use of suitable materials, for example by gray cast iron or light metal casting, in particular cast aluminum, or, for example, by extruded profiles, in particular aluminum profile material. Furthermore, foamed aluminum can be used. Alternatively, such a knife cylinder made of a plastic, including FKV (fiber plastic composite) or specially CFK (high-strength plastic with embedded carbon fibers) may be formed. Likewise, foamed plastic can be used. If necessary, appropriate stiffeners are provided. For example, on a plastic material a plate-like material having a high modulus of elasticity (Young's modulus), such as a ceramic material (single or multiple ceramic plates) or FKV, which serves to increase the rigidity.

A second advantage is that the knife cylinder by means of a machine drive or preferably with a single drive, ie self-propelled, can be driven. In one embodiment, the single drive is circuitically coupled with a machine control of the processing machine.
By means of the single drive and due to the mass reduction of the knife cylinder, for example, in the presence of a safety-related event, in a very short time - be brought to a standstill - starting from the present processing speed. Alternatively, the knife cylinder - starting from a standstill or a relatively low processing speed - can be accelerated to the maximum processing speed. For this purpose, the individual drive supplied by the machine control appropriate signals. However, the knife cylinder is not limited to such a drive. Rather, such a knife cylinder can also be coupled to the main drive of the processing machine, preferably using a gearbox.

As a third advantage is to be mentioned that by means of the single drive and due to the relatively low mass ratios, the web material can be separated taking into account equal or unequal format lengths during the processing operation. In the separation of unequal format lengths at a conveyed with processing speed web material corresponding signals are supplied to the single drive of the machine control. Here, the single drive can be operated delayed or accelerated to the conveying speed of the web material. This allows any format lengths to be separated from the conveyed web material.

A fourth advantage results from the fact that a high rigidity, in particular with the effect of a force on the cutting edge of a knife in the radial cylinder axis direction, of the knife cylinder can be achieved by the contour and despite the mass reduction. In this case, the design of the knife cylinder is not limited to the peripheral arrangement of only one knife in an advantageous manner. For the circumferential arrangement of two knives, these are 180 °, for the arrangement of three knives, these are each 120 ° or for the arrangement of four knives they are offset by 90 °, etc.
The knife cylinder can take the knife with cutting edge in a groove. In a further embodiment, the knife cylinder can be formed with at least one knife with a cutting edge, which is arranged directly on the knife cylinder, ie without a groove for receiving it. In this case, the knife or the blades can be detachably arranged on the knife cylinder. In a further embodiment, each cutting edge can be designed integrated into the cylinder body of the knife cylinder. The knife cylinder or knives, a counter-device is assigned, which is adapted according to the design of the knife for separating the web material.

Fig. 1

einen Messerzylinder mit einer Nut zur Aufnahme eines Messers,

Fig. 2

einen Messerzylinder mit zwei Nuten zur Aufnahme je eines Messers,

Fig. 3

den Messerzylinder gemäß Fig. 2 in Vorderansicht,

Fig. 4

eine Weiterbildung des Messerzylinders gemäß Fig. 2,

Fig. 5 a

eine Rotationsfigur eines Messerzylinders mit schraubenförmig angeordnetem Messer,

Fig. 5 b

eine Rotationsfigur eines Messerzylinders mit hyperbolisch angeordneten Messern,

Fig. 6 a

ein Messerzylinder gemäß Fig. 2 oder 4 mit geneigten Seitenflächen,

Fig. 6 b

eine Darstellung der Relativlage einer Schneide zur Zylinderachse,

Fig. 7

eine Darstellung zweier Seitenflächen eines Messerzylinders (Draufsicht).

The invention will be explained in more detail using an exemplary embodiment. Here are shown schematically:

Fig. 1

a knife cylinder with a groove for receiving a knife,

Fig. 2

a knife cylinder with two grooves for holding one knife each,

Fig. 3

the knife cylinder of FIG. 2 in front view,

Fig. 4

a development of the knife cylinder of FIG. 2,

Fig. 5 a

a rotary figure of a knife cylinder with helically arranged knife,

Fig. 5 b

a rotary figure of a knife cylinder with hyperbolic knives,

Fig. 6 a

a knife cylinder according to FIG. 2 or 4 with inclined side surfaces,

Fig. 6 b

a representation of the relative position of a cutting edge to the cylinder axis,

Fig. 7

an illustration of two side surfaces of a knife cylinder (top view).

A web material 9 passes in the conveying direction 10 a gap 16 in a processing machine. The web material 9 is preferably made of paper, including corrugated cardboard, metal, foil, including plastic, or tissue, etc. The gap 16 is formed of a rotatably arranged knife cylinder 20 and a counter-device 15. The counter-device 15 may be in a training a rotatably mounted impression cylinder, which is partially wrapped by the web material 9. In a further embodiment, the counter-device 15 may be a fixed surface over which the web material is transported in the conveying direction 10. Alternatively, the counter device 15 may comprise a fixed cutter, as shown in Figs. 1 and 2. In a further embodiment, the counter-device 15 may be a structurally identical second knife cylinder 20 with a corresponding number of cutting edges 25 or knives 14 with cutting edges 25.

The knife cylinder 20 is used to separate web material 9, wherein the term "cutting" includes cutting, perforating, punching, etc. For this purpose, the knife cylinder 20 is rotatably supported in a frame 11 on both sides with its cylinder pin in a respective bearing 12 and with a drive of the Processing machine or a separate drive coupled. For this purpose, the cylinder pins are arranged in alignment with a cylinder axis 3.

The knife cylinder 20 also has at least one cutting edge 25 or at least one blade 25 (cutting edge) provided on a blade 14 made of a cutting material for separating the web material 9. The term "knife" used below always includes at least one cutting edge 25 arranged on the knife 14.

In this case, each blade 25 or each blade 14 extends in the direction of the cylinder axis 3 and is arranged to this cylinder axis 3 at a distance 24 with a cylinder axis 3 at an angle β crossing relative position. Preferably, at least the cutting edges 25 and the blades 14 with cutting edges 25 are arranged slightly helically or obliquely (in the case of a hyperbolic design) inclined at an angle β. The counter device 15 is executed in the contour of the selected arrangement of the cutting edges 25 and the knife 14 adapted accordingly. For example, the knife cylinder 20 each have a groove 1 (or 2, etc.) for receiving an arranged knife 14 with at least one cutting edge 25.

The blades 14 may have one or more continuous or interrupted blades 25. In a knife 14 with a continuous blade 25 is known to cut the web material 9 when passing through the gap 16 into individual sheets transversely. In the case of a knife 14 with an interrupted cutting edge 25, the web material 9 is known to be perforated transversely as it passes through the gap 16 in the format length. By means of the transverse perforation of the web material 9, the web material can subsequently be separated into sheets, for example by tearing off, or a folding operation can follow the transverse perforation.

In a preferred embodiment, the cylinder axis 3 or a cylinder pin is coupled at one end with a, preferably electric single drive 13. The single drive 13 is circuitry with an upstream Machine control coupled, so that the knife cylinder 20 is self-propelled in a predeterminable manner to the processing machine or web material 9. By means of the machine control, the single drive 13 is controllable during the processing of the web material 9 such that different formats can be separated.

According to FIG. 1, in a first embodiment, the knife cylinder 20 has a first groove 1 arranged on the circumference and a groove 1 arranged diametrically opposite the groove 1 comprises a cylinder core 4 enclosing the cylinder axis 3. Preferably, on the cylinder core 4 - to the groove 1 diametrically opposite - a mass balance 5 is arranged. The groove 1 receives a knife 14 described above with at least one cutting edge 25, which is arranged in the groove 1.
Alternatively, the knife 14 with at least one cutting edge 25 or the cutting edge 25 itself can be arranged directly on the knife cylinder 20 (without groove). For example, at least one cutting edge 25 or a knife 14 with at least one cutting edge 25 on the knife cylinder 20 can be arranged adherently or detachably. In a further development, a wedge-shaped edge (cutting edge) of the knife cylinder 20 itself may be formed as a cutting edge 25.

Within the cylinder circumference of the knife cylinder 20 with a theoretical diameter 6 are in the radial direction between the cutting edge 25 or at least one cutting edge 25 on the blade 14 and the cylinder core 4 and in the axial direction between the front and rear side surface edge 27, 28 extending first and second side surfaces. 7 , 8 arranged. The adjacent side surfaces 7, 8 are - starting from the cylinder core 4 - within the diameter 6 according to the formation of the cutting edge 25, inclined obliquely β angle or helically (with changing angle β), from the cylinder core 4 to the cutting edge 25 each in one Angle α arranged obliquely inclined. In the position of the knife cylinder 20 with two cutting edges 25 according to FIG. 6a, the angle α with respect to the vertical V present in this position is shown. In this case, the cylinder core 4 encloses the cylinder axis 3 within the diameter 6 and is arranged in the preferably arranged Mass balance 5 or in the cylinder contour with the described side surfaces 7, 8 via. Depending on the inclination of the respective cutting edge 25 or the respective groove 1, 2 or of the respective blade 14 at an angle β (to the cylinder axis 3), the side walls 7, 8 preferably extend parallel to this.

Each cylinder core 4 is always arranged independently of the respective training within the cylinder circumference with a diameter 6. When ambient heat occurs to compensate for the thermal expansion in the knife cylinder 20 at the mass balance 5, a thermal compensation material 23 may be arranged. Alternatively, the mass balance 5 itself is made of a thermal compensating material 23. The thermal compensation material 23 is arranged diametrically opposite the groove 1 or cutting edge 25.

According to FIG. 2, in a second embodiment, the knife cylinder 20 has two circumferentially arranged grooves 1, 2 or knife 14, each with at least one cutting edge 25. The knives 14 with cutting edges 25 are or the first groove 1 is diametrically opposite the second groove 2, the cylinder core 4 is arranged enclosing, i. arranged circumferentially offset by 180 °. Each groove 1, 2 each receives a knife 14 described in the introduction (with at least one cutting edge 25), which is arranged in the respective groove 1, 2. The offset by 180 ° arranged cutting edges 25 on the blade 14 and grooves 1, 2 are with respect to the cylinder axis 3 at an angle β crossing (mirror image offset) arranged on the knife cylinder 20 (Fig. 6b). Preferably, such a knife cylinder 20 is also designed as a module and can be replaced if necessary against another knife cylinder. In particular, in addition to the knife cylinder 20 other components, such as the storage 12, and the counter-device 15 as a complete unit within the processing machine against another unit with knife cylinder, storage and counter-device interchangeable.

Within the cylinder circumference of the knife cylinder 20 with a theoretical diameter 6 are in the radial direction between the two cutting 25th or cutting 25 at knives 14 and the cylinder core 4 and in the axial direction between the front and rear side surface edges 27, 28 extending first and second side surfaces 7, 8 arranged according to the specific arrangement of the cutting edges 25.

The respective adjacent side surfaces 7, 8 are - starting from the cylinder core 4 - inclined towards the respective cutting edge 25 at an angle α (FIG. 6a). In the position according to FIG. 6a of the knife cylinder 20 with two cutting edges 25, the angle α with respect to the vertical V present in this position is shown. In this case, the cylinder core 4 encloses the cylinder axis 3 within the diameter 6 and merges into the respective cylinder contour with the described side surfaces 7, 8. Depending on the inclination of the respective cutting edge 25 or the respective groove 1, 2 or the respective blade 14 at an angle β (to the cylinder axis 3), the side walls 7, 8 extend parallel thereto.

In one embodiment, the cylinder core 4 each adjoining side surfaces 7, 8 helically extending at helically arranged cutting 25 or rectilinearly arranged at hyperbolic cutting edges 25 are arranged obliquely inclined. In the case of helically extending side surfaces 7, 8, the angle β of each of a front side surface edge 27 to each rear side surface edge 28 is formed to increase or vice versa.
In a further embodiment, the cylinder core 4 respectively adjoining side surfaces 7, 8 are arranged in addition to the helical or obliquely inclined, hyperbolic configuration convexly curved towards the cutting edges. Alternatively, the side surfaces 7, 8 - starting from the cylinder core 4 - concave curved. The concave curvature of the side surfaces 7, 8 is for example advantageous if several cutting edges 25, for example two blades 14, each with a cutting edge 25 in one or each of a groove 1, 2, are arranged on the knife cylinder 20 for the double cut. In one embodiment, the adjacent side surfaces 7, 8 have the same inclination angle or the same curvature.

The side surfaces 7, 8 may be formed as full surfaces or alternatively by webs, each with intervening communicating openings 19.

The cylinder core 4, regardless of the embodiments in the free places in a training rectilinear faces 17, 18 have. In a further embodiment, the cylinder core 4 may have convexly or concavely curved (preferably with the same curvature) partial surfaces 17, 18.

In a further development, the side surfaces 7, 8 communicating openings 19 (openings), i. these extend transversely to the cylinder axis 3. The openings 19 may be of the same or unequal geometry. Upon rotation of the knife cylinder 20, the openings 19 are flowed through by ambient air. Depending on the direction of rotation of the knife cylinder 20 flows, for example, in the openings 19 on the side surfaces 7, the air and on the side surfaces 8. The openings 19 can be designed for closing, for example by attachable caps. In the training with webs are the openings 19 between the webs.

Alternatively, instead of the openings 19, each side surface may have recesses 7,8, for example recesses, beads, cassette-shaped pockets, which are formed, for example, by a material removal of the respective side surface 7, 8. The recesses are closed and thus can not be flowed through by the ambient air. Preferably, the depressions on the respectively adjacent side surfaces 7, 8 arranged in mirror image.

In a further development of FIG. 2, FIG. 4 shows a knife cylinder 20 with increased rigidity. Thereafter, this has a in the direction of the cylinder axis 3 concentrically arranged thereon support tube 21, for example made of steel, ceramic, carbon fiber material (CFRP). The support tube 21 receives the end of the cylinder pin or is itself as a cylindrical pin in the storage 12th supported on both sides. On the support tube 21 of the cylinder core 4 and arranged depending on the training side surfaces 7, 8 are arranged analogous to FIG. Cylinder core 4 and the side surfaces 7, 8 are preferably made of a material with a lower shear modulus (G) than the support tube 21. In a development, in addition to the support tube 21 or separately (without support tube 21) on the cylinder core 4 - for example symmetrically each a ceramic plate 22 (or a plate of FKV), alternatively, a plurality of ceramic plates 22 (or more plates of FKV), may be arranged. The ceramic plates 22 are adhesively bonded to the cylinder core 4 and increase the rigidity of the knife cylinder 20. These plates preferably have a higher modulus of elasticity than the cylinder core 4. Alternatively, such plates are made of carbon fiber material.

The knife cylinder 20 is not limited to the arrangement of a cutting edge 25 or a knife 14 with at least one cutting edge 25 or a groove 1 or two cutting edges 25, knife 14 with at least one cutting edge 25 or grooves 1, 2. Rather, peripherally further cutting 25, knife 14 with at least one cutting edge 25 or grooves 1, 2, etc. can be arranged (not shown).

Thus, in a further embodiment of the knife cylinder 20 has three circumferentially disposed cutting edges 25, with or without grooves 1, 2, .... or knife 14, each offset by 120 ° (radially) the cylinder core 4 are arranged. Within the cylinder circumference with a theoretical diameter 6 are between the cutting 25 or three grooves 1, 2, ... or knives 14 each extending in the direction of the cylinder core 4, extending side surfaces 7, 8 are arranged. These adjacent side surfaces 7, 8 are arranged obliquely inclined starting from the cylinder core 4 respectively to the three cutting edges 25 or grooves 1, 2,... (Not shown) or knives 14 with cutting edges 25.
Starting from the cylinder core 4 are thus in this training, each three pairs of adjacent side surfaces 7, 8 before.

In a further embodiment of the knife cylinder 20 may have four circumferentially disposed cutting 25, with or without grooves 1,2, .... or knife 14, each offset by 90 ° (radially) the cylinder core 4 are arranged. Within the cylinder circumference with a theoretical diameter 6 are between the four cutting edges 25 and grooves 1, 2,. Knife 14 in the direction of the cylinder core 4 extending side surfaces 7, 8 are arranged. These adjacent side surfaces 7, 8 are arranged obliquely inclined starting from the cylinder core 4 to the four cutting edges or grooves 1, 2, ... (not shown further) or knives 14 with cutting edge 25. Starting from the cylinder core 4, four pairs of adjacent side surfaces 7, 8 are thus present in this embodiment.

These exemplary embodiments are also for the arrangement of five (each offset by 72 °), six (each offset by 60 °) or a further number on the circumference arranged cutting 25 or grooves 1, 2, ... (others not shown) or knives 14 transferable. The knife cylinder 20 has, for example, five circumferentially disposed cutting edges 25 or grooves 1, 2,... Or blades 14, which are each arranged offset by 72 ° and enclose the cylinder core 4. Within the cylinder circumference with a theoretical diameter 6 between the five cutting edges 25 or grooves 1, 2, or knives 14 with cutting edges 25 extending in the direction of the cylinder core 4 side surfaces 7, 8 are arranged and the side surfaces 7, 8 are starting from the Cylinder core 4 respectively inclined obliquely to the five cutting edges 25 or grooves or knives 14. Alternatively, for example, the knife cylinder 20 has six circumferentially disposed cutting edges 25 or grooves 1, 2, .... or knife 14, each offset by 60 ° the cylinder core 4 are arranged enclosing. Within the cylinder circumference with a theoretical diameter 6 are between the six cutting edges 25 or grooves 1, 2 _, ... or knives 14 in the direction of the cylinder core 4 extending side surfaces 7, 8 are arranged and the side surfaces 7, 8 are starting from the Cylinder core 4 each inclined to the six cutting edges 25 and grooves 1, 2, .... or knives 14 out.

In each of the aforementioned embodiments, the side surfaces 7, 8 are always adjacent to each other and extend according to the number of cutting edges 25 or grooves 1, 2, ... or knife 14 with cutting 25 and their arrangement several times to these.
The side surfaces 7, 8 are formed analogously to the preceding embodiments.

In a preferred embodiment, each cutting edge 25 extends across the format width of the web material in the direction of the cylinder axis 3 and is arranged at a distance 24 to the cylinder axis 3 and with a relative position (i.e., slightly inclined) crossing the cylinder axis 3 on the circumference of the knife cylinder 20. In this case, as already described, preferably two special embodiments can be realized.

In a first embodiment according to FIG. 5 a, each cutting edge 25, here shown by the example of the knife 14 with cutting edge 25, is arranged with a crossing relative position to the cylinder axis 3 at an equal distance 24 from the cylinder axis 3. This formation is achieved by making each cutting edge 25 helical along the circumference of the knife cylinder. 20 runs. Thus, in each case there is a helically arranged cutting edge 25 or a corresponding blade 14 with at least one cutting edge 25. According to FIG. 5 a, the knife cylinder 20 is shown with only one helical cutting edge 25 on the knife 14. Alternatively, as already described, a plurality of such cutting edges 25 may be arranged on the knife cylinder 20. For the double cut, two helical cutting edges 25 arranged at a small distance parallel to one another may be arranged on a knife 14 on the knife cylinder 20, preferably.

In a second embodiment according to FIG. 5 b, each cutting edge 25, here shown by the example of the knife 14 with cutting edge 25, is arranged with crossing relative position (angle β) to the cylinder axis 3 at a varying distance 24 from the cylinder axis 3. This training is achieved by each cutting edge 25 is arranged as a straight line extending obliquely on the circumference of the knife cylinder 20, the distance to the cylinder axis 3 as a hyperbola is trained. Thus, there is in each case a hyperbolic cutting edge 25. In Fig. 5 b, the knife cylinder 20 with two circumferentially arranged cutting 25, for example, knives 14 and 14 'with cutting 25, 25' shown. Both knives 14 with cutting edge 25 (full line) or 14 '(dashed line) diametrically offset by 180 ° are arranged opposite one another. Alternatively, as already described, several such cutting edges 25, for example knives 14 with cutting edge 25, may be arranged on the knife cylinder 20. For the double cut, two hyperbolic cutting edges 25 arranged parallel to one another at a small distance may be arranged on a knife 14 on the knife cylinder 20, preferably.

In Fig. 6 b, a cutting edge 25 is shown on a knife 14 and the blade 14 is received in a groove 1. In this embodiment, the two side surfaces 7, 8 pass into a thickening 26 running on both sides of the knife 14, which serve to stabilize the cutting edge 25.

In Fig. 7 is a plan view of the side surfaces 7, 8 in a knife cylinder 20 with two offset by 180 °, obliquely on the circumference of the knife cylinder 20 straight cutting edges 25 shown. It can be seen that the side surfaces 7, 8 extend in the region of the cylinder core 4 or the partial surface 17 from a front side surface edge 27 to a rear side surface edge 28 at an angle γ to the cylinder axis 3.

LIST OF REFERENCE NUMBERS

1 -

Groove (first)

2 -

Groove (second)

3 -

cylinder axis

4 -

cylinder core

5 -

mass balance

6 -

Diameter (theoretical)

7 -

Side surface (first)

8th -

Side surface (second)

9 -

sheeting

10 -

conveying direction

11 -

frame

12 -

storage

13 -

individual drive

14 -

knife

15 -

Counter device (cylinder, surface, separating device)

16 -

gap

17 -

Partial area (first)

18 -

Partial area (second)

19 -

Breakthrough (openings)

20 -

diameter cylinder

21 -

support tube

22 -

ceramic plate

23 -

thermal compensation material

24 -

distance

25 -

cutting edge

26 -

thickening

27 -

front side surface edge

28 -

rear side surface edge

α -

angle

β -

angle

γ -

angle

V -

vertical

Claims (20)

Knife cylinder for separating web material having at least one circumferentially arranged cutting edge, wherein the knife cylinder has a diametrically opposite the cutting edge, the cylinder axis enclosing cylinder core and are arranged within the cylinder circumference with a theoretical diameter between the cutting edge and cylinder core in the direction of the cylinder axis extending side surfaces, starting from the Cylinder core are inclined towards the cutting edge,
characterized,
in that each cutting edge (25) is arranged at a distance (24) from the cylinder axis (3) and with a relative position crossing the cylinder axis (3) at an angle (β). Knife cylinder according to claim 1,
characterized,
in that each of the cutters (25) is arranged at a varying distance (24) from the cylinder axis (3). Knife cylinder according to claim 1,
characterized,
in that each of the cutters (25) is arranged at an equal distance (24) from the cylinder axis (3). Knife cylinder according to claim 1 and one of claims 2 or 3,
characterized,
that the knife cylinder (20) has two diametrically oppositely arranged on the circumference of the cylinder core (4) enclosing cutting edges (25),
that within the cylinder circumference with a theoretical diameter (6) between the cutting edges (25) in the direction of the cylinder core (4) extending side surfaces (7, 8) are arranged, and
in that the side surfaces (7, 8), starting from the cylinder core (4), are inclined obliquely at an angle (α) towards the cutting edges (25). Knife cylinder according to claim 1 and one of claims 2 or 3,
characterized,
that the knife cylinder (20) comprises three circumferentially disposed cutting edges (25) each offset by 120 ° the cylinder core (4) are arranged including,
that within the cylinder circumference with a theoretical diameter (6) between the three cutting edges (25) in the direction of the cylinder core (4) extending side surfaces (7, 8) are arranged, and
in that the side surfaces (7, 8), starting from the cylinder core (4), are inclined obliquely at an angle (α) towards the three blades (25). Knife cylinder according to claim 1 and one of claims 2 or 3,
characterized,
in that the knife cylinder (20) has four circumferentially arranged cutting edges (25), each offset by 90 °, the cylinder core (4) are arranged enclosing,
in that side faces (7, 8) extending in the direction of the cylinder core (4) are arranged within the cylinder circumference with a theoretical diameter (6) between the four cutting edges (25),
and
in that the side surfaces (7, 8), starting from the cylinder core (4), are inclined at an angle (α) at an angle to the four blades (25). Knife cylinder according to claim 1 and one of claims 2 or 3,
characterized,
that the knife cylinder (20) has five circumferentially arranged blades, (25) the respectively offset by 72 ° the cylinder core (4) are arranged including,
in that side faces (7, 8) extending in the direction of the cylinder core (4) are arranged within the cylinder circumference with a theoretical diameter (6) between the five cutting edges (25),
and
in that the side surfaces (7, 8), starting from the cylinder core (4), are inclined obliquely at an angle (α) towards the five cutting edges (25). Knife cylinder according to claim 1 and one of claims 2 or 3,
characterized,
in that the knife cylinder (20) has six peripherally arranged cutting edges (25) which are each arranged at 60 ° and enclose the cylinder core (4),
that within the cylinder circumference with a theoretical diameter (6) between the six cutting edges (25) in the direction of the cylinder core (4) extending side surfaces (7, 8) are arranged, and
in that the side surfaces (7, 8), starting from the cylinder core (4), are inclined obliquely at an angle (α) towards the six blades (25). Knife cylinder according to claim 1 and 2 or 3 and one of claims 4 to 8,
characterized,
in that the side surfaces (7, 8) adjoining the cylinder core (4) are rectilinear or convexly curved or inclined concavely to the respective cutting edge (25). Knife cylinder according to one of claims 4 to 8,
characterized,
in that the cylinder core (4) has rectilinear or convexly curved or concavely curved partial surfaces (17, 18). Knife cylinder according to claim 1 or one of claims 4 to 8,
characterized,
that the side faces (7, 8) communicating openings (19), which are flowed through on rotation of the knife cylinder (20) from ambient air. Knife cylinder according to claim 1 or one of claims 4 to 8,
characterized,
that the side faces (7, 8) have depressions which have communicating apertures (19), which are flowed through on rotation of the knife cylinder of ambient air. Knife cylinder according to claim 1 or one of claims 4 to 8,
characterized,
that the side faces (7, 8) have recesses which are closed and will not be flowed through by ambient air. Knife cylinder according to claim 1 or one of claims 4 to 8,
characterized,
in that each cutting edge (25) is received in a respective groove (1) arranged on the knife cylinder (20). Knife cylinder according to claim 1,
characterized,
that the cutting edge (25) diametrically opposite a mass balance (5) is arranged. Knife cylinder according to claim 1,
characterized,
that the knife cylinder (20) is end coupled to an individual drive (13). Knife cylinder according to claims 1 and 16,
characterized,
that the individual drive (13) is coupled in terms of circuitry with a machine control and can be driven in a predeterminable manner. Knife cylinder according to claim 1,
characterized,
that the cutting edge (25) diametrically opposite a thermal compensation material (23) is arranged. Knife cylinder according to claims 1 and 18,
characterized,
that the thermal compensating material (23) is arranged on the mass balance (5). Knife cylinder according to claims 1 and 18,
characterized,
that the thermal compensating material (23) is at the same time the mass balance (5).

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