EP3287281B1 - Processing tool and label printing machine with such a processing tool - Google Patents

Description

The invention relates to a machining unit for rotary machining with the preamble features of claim 1 and a label printing machine with such a machining unit according to claim 9.

State of the art

For label printing machines, such as those in the EP 2 103 429 B1 are described printing units and stamping plants are used. The printing units comprise at least three cylinders, namely inking roller, printing cylinder and impression cylinder. The rotary processing causes this application of paint on a substrate. The stamping plants comprise at least two cylinders, namely punching cylinders and punching counter-cylinders. The rotary machining causes this an introduction of punching and / or creasing lines. To adapt to the substrate to be processed and to set the punching depth of the gap, ie the distance between the cylinders must be adjustable.

For this purpose, supporting bodies are used, which can be designed as races, support rings and as so-called bearer rings. Examples of adjusting devices can be found in the DE 10 2005 015 046 A1 and the WO 2012/016758 A1

de 33 17 746 A1 describes a label printing machine with the features of the preamble of claim 1, wherein the support body of the machining cylinder are eccentrically mounted and adjustable by rotation.

A disadvantage of such adjustment is on the one hand their complicated and complex structure. On the other hand, the setting accuracy leaves something to be desired.

This also results in a poor repeatability. That should be chosen for a repeat job exactly the same gap as in its last execution, so designed such an exact setting difficult.

task

Object of the present invention is therefore to provide a processing plant and a label printing machine with such a processing plant, in which the gap between the processing cylinders of the processing plant is simple, accurate and repeatable adjustable.

This problem is solved by a processing plant having the features of claim 1.

The processing unit according to the invention, for. B. a printing unit or stamping, for rotary machining of a web-shaped or arcuate substrate has at least two processing cylinders and a machine frame. In this case, a first processing cylinder is movably mounted in the machine frame and a second processing cylinder stationary in the machine frame, wherein each processing cylinder is associated with a pair of supporting bodies. According to the invention, a respective support body of the second processing cylinder has a solid-state joint, a ring segment attached thereto and a manipulator, wherein a respective ring segment contacts a respective support body of the first processing cylinder. A respective solid-body joint is linearly displaceable by means of a respective manipulator and thus a respective ring segment is linearly displaceable. In order to effect such a displacement movement, a respective manipulator acts on the fixed joint. The use of such a solid-state hinge has the advantage that it is simple, inexpensive, highly accurate adjustable and dirt-resistant.

It is particularly advantageous if a respective solid-body joint has only one degree of freedom, which is aligned along a linear axis. The solid-state joint can preferably be designed such that the solid-state joint has elements and / or material tapers which allow elastic deformation of the solid-body joint and thus movement in the direction of the linear axis.
In an advantageous development, a respective solid-body joint has as such elements at least one leaf spring, wherein the at least one leaf spring connects the body of the solid-state joint with the machine frame.

In a particularly advantageous and therefore preferred embodiment of the processing unit according to the invention, the manipulator is designed as a frame-mounted, rotatable eccentric or spiral roller and is in particular motor-rotatable. It is advantageous if the manipulator is in permanent contact with the solid-body joint, so that a rotational movement of the manipulator can be converted into a linear movement of the solid-body joint.

In an advantageous embodiment of the processing plant, the body of the solid-state joint may be mounted on the machine frame, for. B. by means attached guide jaws.

In a particularly advantageous and therefore preferred embodiment of the processing unit according to the invention, the support bodies of the first processing cylinder are designed as axially arranged to the cylinder races, which are rotatably mounted on the axis of rotation of the cylinder. These races contacted the ring segments of the support body of the second processing cylinder. As a result, the gap between the two processing cylinders can be set very precisely.

In an advantageous embodiment, the first processing cylinder has a tensioning mechanism, for. B. a pneumatic cylinder for hiring and pressing the machining cylinder to each other. Thus, a bias between the processing cylinders can be generated.

In one possible embodiment, the ring segment of a respective support body against a restoring force, such as a spring force, pivotally mounted on the body of the solid-state joint, for which purpose a spring assembly may be integrated in the solid-state joint.

The invention also relates to a label printing machine with at least one processing unit as described above, wherein in particular the first processing cylinder as a printing cylinder, the second processing cylinder as a counter-pressure cylinder and a further stationary processing cylinder as Ink roller, in particular as an anilox roller, are executed. The inking roller then also has support bodies as described in detail above.

On the other hand, if the processing plant has only two processing cylinders, then this can be designed as a stamping unit, the first processing cylinder being designed as a punching cylinder and the second processing cylinder as a counter-punching cylinder. The same structure is also suitable for an embossing mill with embossing and counter embossing cylinder.

The invention described and the described advantageous developments of the invention are also in combination with each other - as far as is technically feasible - advantageous developments of the invention.

With regard to further advantages and constructive and functional advantageous embodiments of the invention, reference is made to the dependent claims and the description of exemplary embodiments with reference to the accompanying figures.

embodiment

The invention will be explained in more detail with reference to attached figures. Corresponding elements and components are provided in the figures with the same reference numerals. In favor of a better clarity of the figures was waived a true to scale representation.

Fig. 1

ein erfindungsgemäßes Bearbeitungswerk

Fig. 2

eine Detailansicht des Stützkörpers aus Fig. 1

Fig. 3

das Bearbeitungswerk aus Fig. 1 in einer 3D-Darstellung

Fig. 4

eine alternative Ausführungsform eines Bearbeitungswerkes

Fig. 5

eine Etikettendruckmaschine mit mehreren Bearbeitungswerken

Fig. 6

eine alternative Ausführungsform eines Bearbeitungswerkes mit nur zwei Zylindern

It show in a schematic representation

Fig. 1

an inventive processing plant

Fig. 2

a detailed view of the support body Fig. 1

Fig. 3

the processing work Fig. 1 in a 3D representation

Fig. 4

an alternative embodiment of a processing plant

Fig. 5

a label printing machine with several processing units

Fig. 6

an alternative embodiment of a processing plant with only two cylinders

In FIG. 1 is a processing plant 10 shown with a first cylinder 11, with a second cylinder 12 and a third cylinder 13, which are mounted in the machine frame 9. In the illustrated embodiment, the processing unit 10 is a flexographic printing unit, wherein the first cylinder 11 is designed as a forme cylinder, the second cylinder 12 as an anilox roller, and the third cylinder 13 as an impression cylinder. The second cylinder 12 and the third cylinder 13 are stationarily mounted in the machine frame 9. The first cylinder 11, however, is mounted on a rocker 19 movable in the machine frame 9. On the rocker 19, a pneumatic cylinder 14 is mounted, which forms a tensioning mechanism and the hiring and pressing of the first cylinder 11 with a force F, a biasing force to the two stationary cylinders 12, 13 is used. Axially and on both sides of the first cylinder 11 11 support bodies 30 are arranged on the axis of rotation of the first cylinder, which are designed as races. These races contact the support bodies 20 of the second and third cylinders. These support bodies 20 are each designed to be linearly displaceable along a linear axis 25.

The structure of a respective support body 20 is in the illustration of FIG. 2 shown in detail. The support body 20 has a solid-state joint 21, a ring segment 23 and a manipulator 24. The solid-state joint 21 has a body 22 and leaf springs 26. The body 22 of the solid-state joint 21 is displaceably mounted on frame-fixed guide elements 27 on the machine frame 9. By means of the leaf springs 26, the body 22 is fixed to the machine frame 9. On the side of the support body 20 facing the first cylinder 11, the ring segment 23 is pivotable about a pivot point 29 (double arrow s) on the body 22 of the solid-body joint 21. In the body 22, a spring assembly 28 is inserted, which causes a restoring force of the ring segment 23. If now the distance between the first cylinder 11 and the second cylinder 12 are set, the ring segment 23 is displaced linearly, undergoes an adjustment movement (double arrow v), which is aligned in the direction of the degree of freedom 25 of the solid-state joint 21. The ring segment 23, which is in contact with the support body 30 of the first cylinder 11, so moves over the support body 30, the first cylinder 11. The displacement of the ring segment 23 is realized by a manipulator 24, which in the illustrated embodiment as a spiral disk is formed, is rotated (rotational movement d), wherein this rotational movement d is converted into a linear displacement movement of the body 22 of the solid-state joint 21. In other words, the adjusting movement v is generated by an externally acting force on the solid-body joint 21 by means of elastic deformation of the solid-state joint 21.

The arrangement of the support body 20 and the support body 30 respectively on both sides of the cylinder 11, 12, 13 (drive side and operation side) goes from the 3D representation of FIG. 3 out. The cylinder 13 has not been shown for the sake of clarity. If the gap between the cylinders 11, 12 or 11, 13 is not to be adjusted uniformly, but instead an entanglement between the cylinders 11, 12 or 11, 13 takes place, 24 different rotational movements d are performed on the drive-side and operator-side manipulators , which results in varying degrees of adjustment v.

The operation of the manipulators can either be done by hand by the machine operator or motorized. This second variant is in FIG. 4 shown. Each manipulator 24 is connected to and is moved by a motor 17. And the motors 17 in turn are data transmission technology connected to a control device 18 and are controlled by this.
In this motorized and automatic solution, a dynamic Druckbeistellung is possible, ie an adjustment of the printing gap depending on the machine speed.

In the case of a change of order, for example when changing from a first cylinder 11 to a first cylinder 11 'of smaller diameter, the pneumatic cylinder 14 is deactivated and the biasing force F between the cylinders 11, 12, 13 is released. The spring assemblies 28, which are integrated in the bodies 22 of the solid-state joints 21, then cause with their spring force that the ring segments 23 are respectively pivoted away from the body 22 of the solid-state joint 21, so that the support body 30 of the first cylinder 11 are raised. This has the result that the first cylinder 11 is turned off by the two other cylinders 12, 13.

As an alternative to the embodiment of the manipulator 24 as a spiral roller, this could also be designed as an eccentric roller or as a piezoactuator.

In FIG. 6 is an editing unit 10 shown with a first cylinder 11 and a second cylinder 12, which are mounted in the machine frame 9. In the illustrated embodiment, the processing unit 10 is a stamping unit, wherein the first cylinder 11 is designed as a punching cylinder and the second cylinder 12 as a stamped counter-cylinder. The second cylinder 12 is stationarily mounted in the machine frame 9. By contrast, the first cylinder 11 is movably supported in the machine frame 9 in a guide, not shown, by means of a support body 20 with a solid-body joint 26.

In the FIG. 5 Figure 11 is a view of a preferred embodiment of a printing machine 100, more specifically, a narrow web label printing machine in a series construction, with printing units 110 following in the horizontal direction. The label printing machine 100 serves to machine a substrate 1000 in web form. The substrate is unrolled from a substrate roll 146 in a feed section 148 of the printing machine 100 and fed through a printing press 100 along a machine direction M path. The printing press 100 may comprise a plurality of frame modules 126, here by way of example three frame modules 126, which together form the machine frame 9. In this embodiment, two printing units 110 or a printing unit 110 and a processing unit 150, here a punching unit for punching out the labels from the web-shaped substrate 100, are each accommodated on a frame module 126. After the individual processing stations follows an outlet part 152, in which the finished products are wound up in a label roll 154. Feeding part 148, rack modules 126 and outlet part 152 are detachably connected to each other so that a modular structure of the printing press 100 results.

In the representation of the individual printing units 110, here flexographic printing units, in addition to the printing cylinders, the impression cylinders and the inking rollers and chamber doctor blade are shown. Furthermore, the printing units 110 in the printing machine 100 on various drying devices: The counter-pressure cylinders are at the respective Printing gap downstream of the printing unit 110 assigned UV drying devices, so that the printed substrate 1000 can be dried directly on the impression cylinder. The printing units 110 also have web guiding rollers 160 for guiding the web-shaped substrate 1000. In the embodiment shown, the fifth printing unit 110 comprises a hot air drying device 162. Alternatively, a UV or an IR drying device could also be used here. Subsequently, a punching unit 150 is arranged, which has a punching cylinder and a counter-punching cylinder as rotating tools. In addition or as an alternative to the stamping plant, it is also possible to use a stamping mill, for example a hot foil stamping mill. As an alternative to the illustrated flexographic printing units, it is also possible to use intaglio, offset printing and rotary screen printing units.
At least one of the printing units 110 and / or the punching unit 150 have the structure of the above-described processing plants 10.

LIST OF REFERENCE NUMBERS

9

machine frame

10

Cutting

11

first cylinder

11 '

first cylinder with a smaller diameter

12

second cylinder

13

third cylinder

14

pneumatic cylinder

15

-

16

axis of rotation

17

engine

18

control device

19

wing

20

Support body second and third cylinder

21

Solid joint

22

body

23

ring element

24

manipulator

25

Linear axis (degree of freedom)

26

leaf spring

27

frame-fixed guide element

28

spring assembly

29

pivot point

30

Supporting body of the first cylinder (race rings)

100

press

110

printing unit

126

rack module

146

substrate roll

148

feeding

150

punching

152

exit station

154

label roll

160

web guide

162

Hot air dryer

1000

substratum

d

rotary motion

v

displacement movement

F

preload force

Claims (9)

1. Treatment unit (10) for the rotary treatment of a web-shaped or sheet-shaped substrate (1000), the unit (10) comprising at least two treatment cylinders (11, 12) and a machine frame (9), wherein a first treatment cylinder (11) is movably supported in the machine frame (9) and a second treatment cylinder (12) is stationarily supported in the machine frame (9) and every treatment cylinder (11, 12, 13) is assigned a pair of support bodies (20, 30),
   characterized in
   that a respective support body (20) of the second treatment cylinder (12) includes a solid-state joint (21), a ring segment (23) fixed thereto, and a manipulator (24), wherein a respective ring segment (23) contacts a respective support body (30) of the first treatment cylinder (11), and in that a respective solid-state joint (21) is linearly movable by means of a respective manipulator (24), thus causing a respective ring segment (23) to be linearly movable (v).
2. Treatment unit according to claim 1,
   characterized in
   that a respective solid-state joint (21) has a degree of freedom (25).
3. Treatment unit according to claim 2,
   characterized in
   that the solid-state joint (21) has elements (26) and/or tapered material sections that allow the solid-state joint (21) to be elastically deformed.
4. Treatment unit according to claim 3,
   characterized in
   that a respective solid-state joint (21) has at least one leaf spring (26), wherein the at least one leaf spring (26) connects the body (22) of the solid-state joint (21) to the machine frame (9).
5. Treatment unit according to any one of the preceding claims,
   characterized in
   that the manipulator (24) is designed as a rotatable eccentric roller or spiral roller and fixed to the frame and is in particular rotatable by a motor.
6. Treatment unit according to any one of the preceding claims,
   characterized in
   that the support bodies (30) of the first treatment cylinder (11) are designed as races.
7. Treatment unit according to any one of the preceding claims,
   characterized in
   that the first treatment cylinder (11) has an adjustment mechanism (14) for engaging the treatment cylinders (11, 12, 13) with one another.
8. Treatment unit according to any one of the preceding claims,
   characterized in
   that the ring segment (23) is disposed to pivot (s) against a reset force on the body (22) of the solid-state joint (21).
9. Label printing machine (100) having at least one treatment unit (10) according to any one of the preceding claims, wherein in particular the first treatment cylinder (11) is a printing cylinder, the second treatment cylinder (12) is an impression cylinder and a further stationary treatment cylinder (13) is an ink applicator roller, in particular an anilox roller.

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