EP4208312A1 - Verfahren zum schleifen eines stanzbelages sowie bogenbearbeitungsmaschine mit einem stanzaggregat - Google Patents
Verfahren zum schleifen eines stanzbelages sowie bogenbearbeitungsmaschine mit einem stanzaggregatInfo
- Publication number
- EP4208312A1 EP4208312A1 EP22708906.7A EP22708906A EP4208312A1 EP 4208312 A1 EP4208312 A1 EP 4208312A1 EP 22708906 A EP22708906 A EP 22708906A EP 4208312 A1 EP4208312 A1 EP 4208312A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- grinding
- punching
- sensor
- processing machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
- B24B5/363—Single-purpose machines or devices for grinding surfaces of revolution in situ
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/12—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving optical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
- B24B5/37—Single-purpose machines or devices for grinding rolls, e.g. barrel-shaped rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D2007/0012—Details, accessories or auxiliary or special operations not otherwise provided for
Definitions
- the invention relates to a method for grinding a punched coating and a sheet processing machine with a punching unit according to the preamble of claim 1 or claim 16.
- Rotary punches usually have punching units with at least one punching cylinder and at least one punching impression cylinder.
- Punching cylinders have punching tools or knives, which process the substrate during operation and also come into contact with the punching impression cylinder.
- the punching counter-pressure cylinders have elastic and resistant coatings or punching coatings. Over time, these elevators wear out and need to be ground down to maintain accuracy. A uniform diameter of the die-cut covering is restored over the width of the die-cut covering. For example, grinding cylinders are used for this purpose.
- the grinding cylinder has an abrasive surface and rotates in the same direction as the die platen cylinder, and can also grind the die platen cylinder during production.
- the change in diameter of the pad caused by the grinding process can be calculated and a signal sent to the speed compensator motor.
- US Pat. No. 6,913,566 B2 discloses a rotary punch with a punching cylinder and a punching counter-pressure cylinder.
- the punch counter-pressure cylinder is ground down by means of a grinding cylinder and the speed of the Punch counter-pressure cylinder adjusted to the new diameter using a formula.
- the object of the invention is to provide a method and a device for grinding a stamped coating.
- the advantages that can be achieved with the invention consist in particular in the fact that a punching impression cylinder can be ground off in an improved manner.
- the grinding cylinder can be flexibly adjusted to the punching counter-pressure cylinder for grinding.
- the system is designed in such a way that the grinding cylinder can automatically adjust itself to the die-cutting counter cylinder.
- the system can use the grinding cylinder to determine the diameter of the punching impression cylinder. Intervention or manual readjustment by a system operator is not necessary.
- the initialisation of the grinding cylinder to a new or changed die-cut covering also runs automatically.
- the grinding cylinder is rotated against the punching counter-pressure cylinder by means of an actuator.
- the speed of the at least one counter-pressure cylinder is changed and/or the counter-pressure cylinder is rotated.
- This rotation and/or change in speed is detected with a high level of accuracy, in particular a higher level of accuracy compared to previous solutions.
- This point in time is recognized quickly and precisely by the rotary encoder and this position of the grinding cylinder is saved.
- this value is selected as the starting position and a piece of the stamping layer is ground off from there. This end position is then saved again and the next grinding process starts from this point.
- the grinding cylinder is also advantageous for the grinding cylinder to be placed against the punched coating and placed again several times in succession. On the one hand, accuracy can be achieved by averaging be increased and overheating avoided.
- a further advantage that can be achieved with the invention consists in particular in the fact that a sensor for monitoring the grinding process is preferably arranged on the punching unit.
- the at least one sensor is aimed at the at least one grinding cylinder and can be used to diagnose the grinding process.
- the sensor preferably monitors the change in the diameter of the counter-punch covering. This signal can be used, for example, to adapt the speed of the counter-pressure cylinder to the die-cutting cylinder again.
- the at least one sensor also monitors the grinding processes and forms mean values in order to be able to make precise measurements and predictions about the grinding processes.
- it can be monitored whether the elevator on the grinding cylinder is worn. Accordingly, a plant operator can be warned by means of a signal.
- the sensor is particularly preferably directed at a control area which the punching knives do not enter. It can thereby be achieved that the grinding process can be monitored particularly well.
- the diameter of the die-cutting layer can optionally be determined via the at least one sensor and the grinding cylinder in connection with the rotary encoder of the die-cutting impression cylinder and the progress of the grinding. From this, an adjusted speed of the counter-pressure cylinder can be determined.
- the surface speed of the punching cylinder and the punching impression cylinder can thus be matched to one another.
- the two cylinders run in synchronism with the same surface speed. As the grinding progresses, the change in diameter of the punching coating is saved and a new speed on the punching counter-pressure cylinder is calculated.
- FIG. 1 shows a schematic representation of a sheet processing machine with at least one punching unit
- FIG. 2 shows a perspective representation of the punching unit in a preferred embodiment
- FIG. 3 shows a side view of the punching unit in a preferred embodiment
- FIG. 4 shows a perspective representation of a distance sensor in a preferred embodiment.
- a processing machine 01 is preferably embodied as a printing machine 01 and/or as a shaping machine 01, in particular a punching machine 01.
- Printing press 01 is embodied as a flexographic printing press 01, for example.
- Processing machine 01 is preferably referred to as printing machine 01 if it has at least one printing unit 614 and/or at least one printing unit 600, in particular regardless of whether it has other units for processing substrate 02.
- a processing machine 01 embodied as a printing machine 01 also has at least one other such unit 900, for example at least one shaping unit 900, which is preferably embodied as a punching unit 900, more preferably as a punching device 900.
- Processing machine 01 is preferably referred to as a shaping machine 01 if it has at least one shaping mechanism 914 and/or at least one shaping unit 900, in particular regardless of whether it has other units 600 for processing substrate 02.
- Processing machine 01 is preferably referred to as punching machine 01 if it has at least one punching unit 914 and/or at least one punching unit 900 and/or at least one punching device 900, in particular regardless of whether it has other units 600 for processing substrate 02.
- a processing machine 01 configured as a shaping machine 01 or punching machine 01 also has at least one additional unit 600 for processing substrate 02, for example at least one printing unit 600 and/or at least one printing unit 614.
- processing machine 01 in particular a sheet processing machine 01, preferably comprises a unit 100 embodied as sheet feeder 100 and/or at least one application unit 614 for applying at least one printed image to substrate 02. If processing machine 01 has at least one printing unit 614 and/or at least a printing unit 600 on the one hand and at least one shaping unit 914 and/or at least one shaping unit 900 on the other hand, it is therefore configured both as a printing press 01 and as a shaping machine 01.
- processing machine 01 has at least one printing unit 614 and/or at least one printing unit 600 on the one hand and at least one punching unit 914 and/or at least one punching unit 900 and/or at least one punching device 900 on the other hand, it is therefore suitable both as a printing machine 01 and as a shaping machine 01, in particular punching machine 01.
- the processing machine 01 is preferably embodied as a sheet processing machine 01, i.e. as a processing machine 01 for processing sheet-like material Substrate 02 or sheet 02, in particular sheet-type printing material 02.
- sheet processing machine 01 is embodied as a sheet-fed printing machine 01 and/or as a sheet-forming machine 01 and/or as a sheet-fed punching machine 01.
- Processing machine 01 is more preferably embodied as a corrugated cardboard sheet processing machine 01, i.e. as a processing machine 01 for processing sheet-type substrate 02 or sheets 02 made of corrugated cardboard 02, in particular sheet-type printing material 02 made of corrugated cardboard 02.
- the processing machine 01 is more preferably embodied as a sheet-fed printing machine 01, in particular as a sheet-fed printing machine 01 Corrugated sheet printing machine 01, i.e.
- Printing machine 01 is embodied, for example, as a printing machine 01 that operates using a printing forme-based printing process.
- the term sheet-shaped substrate 02 in particular a printing material 02, specifically sheet 02, is used here to mean any flat substrate 02 or any substrate 02 that is present in sections, i.e. also substrates 02 that are in the form of panels or plates, i.e. also panels or plates, be included.
- the sheet-like substrate 02 or sheet 02 defined in this way is formed, for example, from paper or cardboard, ie as a sheet of paper or cardboard, or from sheets 02, panels or possibly panels made of plastic, cardboard, glass or metal. More preferably, substrate 02 is corrugated cardboard 02, in particular corrugated cardboard sheets 02.
- the at least one sheet 02 is preferably embodied as corrugated cardboard 02.
- the thickness of a sheet 02 is preferably understood to mean a dimension orthogonal to a largest area of the sheet 02. This largest area is also referred to as the main area.
- the thickness of the sheets 02 is, for example, at least 0.1 mm, more preferably at least 0.3 mm and even more preferably at least 0.5 mm.
- significantly greater thicknesses are also common, for example at least 4 mm or even 10 mm and more.
- corrugated sheets 02 are comparatively stable and therefore not very flexible. Corresponding adjustments to the processing machine 01 therefore make it easier to process thick sheets 02.
- the respective, preferably at least one, sheet 02 is preferably made of paper or cardboard.
- paper is a flat material consisting essentially of fibers, mostly of vegetable origin, which is formed by draining a fibrous suspension on a sieve. This creates a fiber felt that is then dried.
- the mass per unit area of paper is preferably at most 225 g/m 2 .
- cardboard is a flat material consisting essentially of fibers of plant origin, which is formed by dewatering a fibrous suspension on one or between two screens. The fiber structure is compacted and dried.
- Cardboard is preferably made from cellulose and/or by gluing or pressing together. Cardboard is preferably designed as solid cardboard or corrugated cardboard 02.
- corrugated cardboard 02 is cardboard made of one or more layers of corrugated paper that is glued to one layer or between several layers of another preferably smooth paper or cardboard.
- the basis weight of paperboard is over 225 g/m 2 .
- the term board refers to a paper fabric that is preferably coated on one side and preferably has a mass per unit area of at least 150 g/m 2 and at most 600 g/m 2 .
- Cardboard preferably has high strength relative to paper.
- the processing machine 01 preferably has a plurality of units 100; 300; 600; 700; 900; 1000 on.
- a unit is preferably understood to mean a group of devices that interact functionally, in particular to be able to carry out a preferably self-contained processing operation on sheets 02.
- a module is to be understood in particular as a respective unit or a structure made up of several units, which preferably has at least one means of transport and/or at least one controllable and/or regulatable drive of its own and/or as an independently functioning module and/or each manufactured separately and/or is formed as a machine unit or functional assembly mounted on its own.
- a unit or module's own controllable and/or regulatable drive means in particular, a drive that serves to drive the movements of components of this unit or module and/or that serves to transport substrate 02, in particular sheets 02, through it respective unit or module and/or through at least one effective area of this respective unit or module and/or which is used to directly or indirectly drive at least one component of the respective unit or module intended for contact with sheets 02.
- the separate controllable and/or regulatable drive of a unit or module is designed to drive movements of components of this unit or module and/or to cause substrate 02 to be transported and/or at least one component of the respective unit intended for contact with sheets 02 or Module trained directly or indirectly driving.
- These drives of the aggregates 100; 300; 600; 700; 900; 1000 of processing machine 01 are preferably embodied as position-controlled electric motors in particular.
- Each unit preferably has 100; 300; 600; 700; 900; 1000 at least one drive controller and/or at least one drive controller, which the respective at least one drive of the respective unit 100; 300; 600; 700; 900; 1000 is assigned.
- the drive controls and/or drive controllers of the individual units 100; 300; 600; 700; 900; 1000 can preferably be operated individually and independently of one another.
- the individual aggregates 100; 300; 600; 700; 900; 1000 and/or in particular modules 100; 300; 600; 700; 900; 1000 of processing machine 01 can therefore be operated and/or operated in an electronically coordinated manner, at least with regard to their drives, in particular by means of at least one electronic master axis.
- An electronic master axis is preferably specified for this purpose, for example by a higher-level machine controller of processing machine 01.
- the individual units 100; 300; 600; 700; 900; 1000 of processing machine 01 at least with regard to their drives, for example, are mechanically synchronized and/or can be synchronized with one another.
- the individual units 100; 300; 600; 700; 900; 1000 of processing machine 01 are mechanically decoupled from one another, at least with regard to their drives.
- the spatial area provided for the transport of substrate 02, which the substrate 02 occupies at least temporarily if it is present, is the transport path.
- the transport path is preferably defined by at least one device for guiding the substrate 02 when the processing machine 01 is in an operating state.
- the aggregates 100; 300; 600; 700; 900; 1000 of the processing machine 01 preferably characterized in that the through the respective unit 100; 300; 600; 700; 900; 1000 defined section of a transport path provided for transporting sheets 02 is at least essentially flat and more preferably completely flat.
- a substantially flat section of the transport path provided for transporting sheets 02 is to be understood as meaning a section that has a minimum radius of curvature of at least 2 meters, more preferably at least 5 meters and even more preferably at least 10 meters and even more preferably at least 50 meters.
- a completely flat section has an infinitely large radius of curvature and is thus also substantially flat and thus also has a minimum radius of curvature which is at least 2 meters.
- the aggregates 100; 300; 600; 700; 900; 1000 of the processing machine 01 preferably characterized in that the through the respective unit 100; 300; 600; 700; 900; 1000 defined section of the transport path provided for the transport of sheets 02 runs at least essentially horizontally and more preferably exclusively horizontally.
- This transport path preferably extends in a direction T, in particular transport direction T.
- An essentially horizontal transport path provided for the transport of sheets 02 means in particular that the transport path provided in the entire area of the respective unit 100; 300; 600; 700; 900; 1000 exclusively has one or more directions that deviate by at most 30°, preferably at most 15° and more preferably at most 5° from at least one horizontal direction.
- the direction of the transport path, in particular the transport direction T is in particular the direction in which the sheets 02 are transported at the point at which the direction is measured.
- the transport path provided for transporting sheets 02 preferably begins at a point where sheets 02 are removed from a feeder stack 104.
- Processing machine 01 preferably has at least one substrate feed system 100, which is more preferably embodied as unit 100, in particular substrate feed unit 100, and/or as module 100, in particular substrate feed module 100.
- the at least one substrate feed system 100 is preferably embodied as sheet feeder 100 and/or sheet feeder unit 100 and/or sheet feeder module 100.
- Processing machine 01 has, for example, at least one unit designed as a conditioning device, in particular a conditioning unit, which is more preferably configured as a module, in particular as a Conditioning module is formed.
- a conditioning device is designed, for example, as a preparation device or as an after-treatment device.
- Processing machine 01 preferably has at least one unit designed as a preparation device, in particular a preparation unit, which is more preferably designed as a module, in particular as a preparation module, and represents a conditioning device.
- Processing machine 01 preferably has at least one post-processing device.
- Processing machine 01 preferably has at least one unit 300, preferably one system device 300, which is more preferably embodied as a system unit 300 and/or system module 300.
- the at least one contact device 300 is alternatively embodied as a component of the substrate feed device 100 or another unit.
- the processing machine 01 has, for example, at least one unit 600, e.g. B. application unit 600, which is preferably designed as a module 600, in particular application module 600.
- the at least one application unit 600 is preferably arranged and/or constructed depending on the function and/or application method.
- the at least one application unit 600 preferably serves to apply at least one respective application fluid or coating medium to the entire surface and/or part of the surface of sheets 02.
- An example of an application unit 600 is a printing unit 600 or printing module 600, which is used in particular to apply printing ink and/or ink to substrate 02, in particular sheets 02.
- the at least one application unit 600 is designed to apply application fluid, preferably printing ink and/or ink, to the entire surface and/or part of the surface of sheets 02, for example.
- application fluid preferably printing ink and/or ink
- any priming unit and/or coating unit that may be provided also apply as such an application unit 600 or printing unit 600.
- application units 600 can preferably be differentiated with regard to their application methods.
- An example of an application unit 600 is a form-based application unit 600, which in particular has at least one fixed, physical and preferably exchangeable printing form.
- Shape-based application units 600 preferably work according to a planographic printing process, in particular an offset planographic printing process and/or a gravure printing process and/or a relief printing process, particularly preferably a flexographic printing process.
- the corresponding application unit 600 is then, for example, a flexo application unit 600 or flexo printing unit 600, in particular a flexo application module 600 or flexo printing module 600.
- Processing machine 01 has, for example, at least one unit designed as a drying device, in particular a drying unit, which is more preferably designed as a module, in particular as a drying module.
- at least one drying device 506 and/or at least one post-drying device is a component of at least one, preferably as module 100; 300; 600; 700; 900; 1000 trained unit 100; 300; 600; 700; 900; 1000.
- at least one application unit 600 has at least one drying device 506 and/or has at least one unit 700 embodied as a transport device 700 and/or at least one transport unit 700.
- Processing machine 01 preferably has at least one transport system 700, which is more preferably embodied as unit 700, in particular transport unit 700, and/or as module 700, in particular as transport module 700.
- the transport device 700 is also referred to as a means of transport 700 .
- the processing machine 01 preferably has transport devices 700, for example as components of other units and/or modules.
- Processing machine 01 preferably has at least one shaping device 900, which is more preferably configured as unit 900, in particular shaping unit 900 or punching unit 900, and/or as a module 900, in particular as a shaping module 900 or punching module 900 and/or as a punching device 900.
- Processing machine 01 preferably has at least one shaping unit 900 embodied as a punching unit 900.
- the at least one shaping device 900 is preferably embodied as a rotary punching device 900 and/or preferably has at least one shaping unit 914 or punching unit 914.
- a shaping device 900 should also be understood to mean an embossing device and/or a creasing device.
- a perforating device is preferably also a form of a punching device 900.
- Processing machine 01 preferably has at least one unit 1000 embodied as substrate delivery system 1000, in particular embodied as delivery 1000, in particular unit 1000 embodied as sheet delivery 1000, in particular delivery unit 1000, which is further preferably embodied as module 1000, in particular as delivery module 1000.
- the transport direction T provided in particular for transporting sheets 02 is the direction T, which is preferably oriented at least essentially and more preferably completely horizontally and/or which is preferably oriented by a first unit 100; 300; 600; 700; 900; 1000 of the processing machine 01 to a last unit 100; 300; 600; 700; 900; 1000 of processing machine 01 points, in particular from a sheet feeder unit 100 or a substrate feed system 100, on the one hand, to a delivery unit 1000 or a substrate delivery system 1000, on the other hand, and/or which preferably points in a direction in which the sheets 02, apart from vertical movements or vertical components, point are transported by movements, in particular by a first contact with a substrate supply device 100 downstream unit 300; 600; 700; 900; 1000 of the processing machine 01 or first contact with the processing machine 01 up to a last contact with the processing machine 01.
- the transport direction T is preferably the direction T in which a horizontal component of a direction points, which is oriented from the system device 300 to the substrate delivery device 1000.
- a direction A is preferably orthogonal to the transport direction T of the sheets 02 and/or orthogonal to the intended transport path of the sheets 02 through the at least one application unit 600 and/or through the at least one shaping unit 900 and/or through the at least one sheet delivery unit 1000 in direction A.
- the transverse direction A is preferably a horizontally oriented direction A.
- a working width of processing machine 01 and/or the at least one application unit 600 and/or the at least one shaping unit 900 and/or the at least one sheet delivery unit 1000 preferably a dimension that preferably extends orthogonally to the intended transport path for sheets 02 through the at least one application unit 600 and/or the at least one shaping unit 900 and/or the at least one sheet delivery 1000, more preferably in the transverse direction A.
- the working width of the processing machine 01 corresponds to preferred a maximum width that a sheet 02 may have so that it can still be processed with processing machine 01, i.e. in particular a maximum sheet width that can be processed with processing machine 01.
- the width of a sheet 02 is to be understood in particular as its dimension in the transverse direction A.
- the working width of processing machine 01 preferably corresponds to the working width of the at least one application unit 600 and/or the at least one shaping unit 900 and/or the at least one sheet delivery 1000.
- the working width of processing machine 01, in particular sheet processing machine 01 is preferably at least 100 cm, more preferably at least 150 cm cm, even further preferably at least 160 cm, even more preferably at least 200 cm and even more preferably at least 250 cm.
- a vertical direction V preferably designates a direction that is parallel to the normal vector of a plane spanned by the transport direction T and the transverse direction A.
- vertical direction V is preferably oriented such that it points from printing substrate 02 to a forme cylinder 901 of shaping device 900.
- Sheet processing machine 01 is preferably a sheet processing machine 01 with at least one shaping system 900 and at least one delivery 1000 arranged downstream of the at least one shaping system 900 along a transport path provided for transporting sheets 02.
- the at least one shaping system 900 is preferably configured as a punching system 900 and/or as a Rotary punching device 900 formed.
- exactly one shaping device 900 in particular punching device 900 and/or rotary punching device 900, is arranged.
- the at least one shaping device 900 preferably has at least one and more preferably exactly one shaping point 909.
- the at least one shaping device 900 preferably has at least one and more preferably precisely one shaping point 909, which is formed by at least and more preferably precisely one forme cylinder 901, embodied in particular as a cutting forme cylinder 901, on the one hand and at least one impression cylinder 902 on the other.
- the shaping point 909 is preferably that area in which the respective forme cylinder 901 on the one hand and the respective impression cylinder 902 on the other hand are closest to each other.
- the at least one shaping point 909 is preferably embodied as at least one punching point 909 and/or as at least one transport means 909 and/or as at least one shaping transport means 909 and/or as at least one punching transport means 909.
- the shaping device 900 in particular the shaping mechanism 914, preferably further comprises at least one tool the at least one forme cylinder 901 preferably comprises at least one tool.
- the tool of the shaping device 900 in particular of the shaping unit 914, preferably the tool of the forme cylinder 901, is in direct contact with the impression cylinder 902, in particular in the area of the shaping point 909.
- the impression cylinder 902 and the impression cylinder 903 must preferably be operational Run synchronously, preferably with the same surface speed.
- the at least one forme cylinder 901 embodied as a punching cylinder 901 has a tool with knives that are preferably arranged vertically.
- the knives are preferably arranged discontinuously and differ depending on the die-cutting job. For example, the knives differ in the penetration depth. In particular, it is then not possible to specify a single surface speed for the punching cylinder. A mean value is then preferably used for calculation.
- the at least one starting diameter must preferably be entered, for example manually, in an interface to a controller before the machine is started.
- the at least one impression cylinder 902 embodied as a die-cut impression cylinder 902 preferably has a lining or die-cut covering 906.
- the die-cut covering is preferably made of a plastic and/or rubber and has slightly elastic properties.
- Die-cutting pad 906 is preferably made of a plastic such as polyurethane or the like.
- the stamped coating 906 can be easily depressed, for example, and can partially deform back.
- Such a die-cut coating 906 is usually between 10 mm and 12 mm thick, with between 4 and 8 mm being grindable.
- At least one grinding cylinder 903 or one grinding roller 903 is arranged or can be set on the punching impression cylinder 902 .
- the at least one grinding cylinder 903 has a drive 905, preferably a direct drive 905.
- the at least one grinding cylinder 903 has a rough surface.
- a rough material is mounted on the grinding cylinder 903 and/or a rough material is wound around the grinding cylinder 903.
- the surface of the sanding cylinder 903 resembles emery paper and/or sandpaper.
- the rough material is wound onto the loop cylinder 903 and only partially or completely covers its lateral surface.
- the entire grinding cylinder 903 is made of one material and has a rough material on the surface.
- the at least one grinding cylinder 903 can be adjusted against the at least one punching impression cylinder 902 via at least one actuator 907.
- the linear movement of the actuating drive 907 is converted into a pivoting movement by means of a pivoting axis 908 .
- the grinding cylinder 903 can thus be pivoted onto and/or pivoted away from the punching impression cylinder 902.
- the grinding cylinder 903 can be placed against the punched coating 906 by a sequence stored in a controller.
- the grinding cylinder 903 can only be roughly adjusted with a faster movement, for example up to a distance of 3 mm, and a fine adjustment can be made in slow steps.
- such a slow speed is between 0.5 mm/min and 2 mm/min, preferably 1 mm/min.
- At least one sensor 904 for monitoring the grinding is preferably arranged on the at least one punching impression cylinder 902.
- the die-cutting layer 906 preferably has a width with an area on which no die-cutting takes place. In particular, this area is on the outside of the stamping layer 906 .
- the at least one grinding cylinder 903 preferably also grinds this outer area.
- the area in which punching takes place is preferably the punching area and the area in which grinding takes place is preferably the grinding area.
- the grinding area is preferably larger than the punching area.
- the at least one sensor 904 is preferably arranged precisely in this outer area or is at least directed towards this area, which is referred to here as the control area.
- the at least one sensor 904 is therefore preferably outside of the Punching area arranged or directed at least to the control area outside of the punching area.
- the at least one sensor 904 is preferably arranged within the grinding area or is at least directed towards this area.
- this area is suitable since no major damage occurs on the die-cutting coating through the die-cutting cylinder 901 in this area and fluctuations in the measured values can be kept small. With this arrangement, the grinding process can be monitored particularly well, since the measured values are not changed by the knife entry of the punching knife.
- the punching unit 900 preferably has a holder which is fastened to the housing.
- the at least one sensor 904 is arranged on a traverse 911, which is arranged on the housing of the punching machine.
- the distance between the at least one sensor 904 and the stamping layer 906 is between 10 mm and 300 mm.
- the at least one traverse 911 is preferably arranged across the entire width of the punching cylinder 901, with the at least one sensor 903 preferably being arranged outside the punching area and even more preferably inside the grinding area.
- arranged means that the at least one sensor 904 is arranged to be directed towards this area, in particular the control area.
- the at least one sensor 904 is preferably embodied as a laser sensor for distance measurement.
- a sensor 904 works by means of triangulation or angle measurement to determine the distance to an object.
- the transmitter and receiver are preferably arranged in the same housing. In the case of rough surfaces, an enlarged laser cone is advantageous here.
- the at least one sensor 904 measures a distance between the at least one sensor 904 surface of die-cut covering 906.
- the senor 904 can also be embodied as a camera, for example.
- the sensor 904 controls the grinding or the surface of the stamped covering 906.
- the at least one sensor 904 is embodied as an inductive and/or optical sensor 904.
- the at least one sensor 904 is preferably designed as a laser and preferably has a transmitter and receiver in the same housing.
- the at least one sensor 904 preferably has an accuracy of 2/100 mm.
- the at least one sensor 904 preferably measures at least the distance between the sensor 904 itself and the die-cutting layer 906 of the die-cutting impression cylinder 902. The diameter of the die-cutting layer 906 can thus be monitored during operation.
- At least the following values are monitored via the distance measurement and/or path measurement and, if necessary, warnings are displayed at the control station.
- the path of the grinding process can be monitored, which happens via the change in distance during grinding.
- An average of all grinding processes since the last pad change can also be output.
- sensor 904 it is coupled, at least in terms of data technology, to a control unit and/or the control console of sheet processing machine 01.
- warnings to the system operator can be sent directly to the control center, for example.
- the stamping coating 906 is ground in several steps. Some settings can be made in a control station before the start of the grinding, for example as a function of a punched coating 906 or a grinding cylinder 903. For example, an interval, in particular the number of revolutions of the punching impression cylinder 902 before grinding, can be set. In addition, it is possible to set the amount of punching coating 906 that is to be removed per grinding process. This is done, for example, by adjusting the travel of the actuator 904 . Apart from the aforementioned parameters, which preferably only take place after changing the punched coating 906 or the grinding cylinder 903, the grinding or the grinding processes take place without manual setting of parameters.
- the grinding cylinder 903 is set to the diameter, in particular the starting diameter, in an initialization step of the die-cutting impression cylinder 902 with the die-cut covering 906.
- the initialization step a starting position of the grinding cylinder 903 or the grinding roller 903 is found.
- the initialization is started, for example, by pressing a button.
- the grinding cylinder 903 then begins to rotate through the drive 905 and it is slowly, in particular at less than 10 mm/min, approached or pivoted in the direction of the punched coating 906 in a rotating manner.
- it is hired in two stages. First, the at least one grinding cylinder 901 is turned on without rotation in a first area and then rotated and then turned on.
- the grinding cylinder 903 When it comes into contact with the punching impression cylinder 902, the grinding cylinder 903 experiences a change in speed and/or is set in motion or rotating. This change in speed or movement can be registered by the drive, in particular the rotary encoder, of the counter-pressure cylinder 902 and the associated position of the grinding cylinder 903 can be stored as the starting position.
- the diameter of the grinding cylinder 901 is determined indirectly by the starting position. This process can be repeated several times, for example three times, for increased accuracy. By turning further, the diameter can be measured at several points. By repeating this several times, the mean value of the diameter can be determined and the accuracy can be increased.
- the starting position for the start of the first grinding process is known and grinding can then begin during operation. The grinding preferably takes place for the first time after about 50,000 sheets.
- a first grinding operation is performed while the machine is running.
- the first grinding process follows after preferably several 10,000 sheets, for example after approx. 50,000 sheets.
- a larger amount is preferably ground off in a first pass than in the subsequent passes. Not sanding this larger dimension in one go, it will be broken up into several short sandings. The reason for this is the associated heating of the die-cutting layer 906. All further passes are carried out with previously defined parameters. For example is ground in each grinding operation for the number of 150 revolutions of the impression cylinder 902.
- the speed of the counter-pressure cylinder 902 is then adjusted again via the changed diameter so that synchronization with the cylinder 901 prevails. In particular, both have the same surface speed.
- the diameter of the die pad 906 changes, its surface speed changes and must be adjusted accordingly. This is done, for example, via a controller that is coupled to the actuating drive of the grinding cylinder 903 and to the drive of the counter-pressure cylinder 902 .
- Each grinding step is stored in a controller and a new speed is calculated by relating the diameter that has been ground off.
- the speed of the grinding cylinder is also adjusted accordingly, preferably to a machine speed.
- the at least one sensor 904 is preferably also used to measure the speed of the cylinders 902; 903 to adjust.
- the signal from the sensor 904 is a measure of the diameter of the counter-pressure cylinder 902. From this, in connection with the surface speed of the cylinder 901, a new speed for the counter-pressure cylinder 902 and the grinding cylinder 903 can be calculated.
- the surface speed for synchronous operation can be determined from the known diameter.
- the grinding process is described below.
- the starting position of the grinding cylinder 903 is known from the previous initialization.
- the grinding cylinder 903 is approached in the vicinity of the punched coating 906 at a first speed.
- the pitch speed is reduced to a second speed.
- the speed is preferably between 0.5 mm/min and 3 mm/min, preferably 1 mm/min.
- the target dimension is approached at this speed.
- grinding is carried out for the number of 150 revolutions, preferably of the punching impression cylinder 902. Then the grinding cylinder 903 shuts down and moves to its parking position. With each additional grinding process, the last grinding position is approached reduced by the value of the creep path or the ground diameter.
- the at least one grinding cylinder 903 rotates at the grinding speed.
- the grinding speed is preferably based on the current machine speed.
- the grinding cylinder 903 and the punching counter-pressure cylinder 902 preferably rotate in opposite directions during the grinding process.
- a grinding cylinder 903 rotates at a higher magnitude surface speed.
- a differential speed of the surface speeds is between 9 and 15 m/s, more preferably 12 m/s.
- the differential speed of the grinding is preferably kept constant even at different machine speeds.
- the at least one sensor 904 monitors the grinding or a diagnosis of the grinding is generated.
- the diameter of the punched coating 906 is monitored in this way. Since the stamping layer 906 oscillates, for example between plus and minus 15 mm, is always measured with the sensor 904 at the same point on the counter-pressure cylinder 902. For example, the following values are monitored via the at least one sensor 904 and, if necessary, warnings are displayed at the control station.
- the path of the last grinding process is monitored. In addition, an average of all grinding processes since the last cutting pad change is created and saved. If, for example, the measured grinding path decreases, for example due to a deviation from a setpoint value or setpoint path, this provides an indication that the sandpaper is worn out.
- a plant operator is shown an error message and/or warning message on a display.
- other parts of the system can also be set via the signal of the at least one sensor 904 .
- a brush roller can be tracked in the outlet of punching machine 01. Thus, this is the contact to the respective cylinder and does not have to be tracked manually.
- the starting position is found in the initialization step by measuring the force with a force gauge on the grinding cylinder 903 . Then the grinding cylinder 903 is set against the counter-pressure cylinder 902 via the actuating drive 907 and when the two cylinders come into contact, the force on the dynamometer increases. If a target value is exceeded, the position of the grinding cylinder 903 is saved and set as the starting position for grinding. In particular, the diameter of the punched coating 906 is measured in this way. The following steps can be followed as described in the other embodiment.
- Die cutting machine flexographic printing machine, sheet processing machine, sheet printing machine, sheet forming machine, sheet die cutting machine, corrugated sheet processing machine, corrugated sheet printing machine
- Substrate feed module sheet feeder, sheet feeder unit, sheet feeder module
- drying device 00 application unit, module, application module, printing unit, printing module, flexo application unit, flexo printing unit, flexo application module, flexo printing module 14 application unit, printing unit
- Punching unit shaping module, punching module, punching device, rotary die cutter
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021105515.6A DE102021105515A1 (de) | 2021-03-08 | 2021-03-08 | Verfahren zum Schleifen eines Stanzbelages sowie Bogenbearbeitungsmaschine mit einem Stanzaggregat |
| PCT/EP2022/054779 WO2022189169A1 (de) | 2021-03-08 | 2022-02-25 | Verfahren zum schleifen eines stanzbelages sowie bogenbearbeitungsmaschine mit einem stanzaggregat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4208312A1 true EP4208312A1 (de) | 2023-07-12 |
Family
ID=80683888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22708906.7A Withdrawn EP4208312A1 (de) | 2021-03-08 | 2022-02-25 | Verfahren zum schleifen eines stanzbelages sowie bogenbearbeitungsmaschine mit einem stanzaggregat |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4208312A1 (de) |
| DE (1) | DE102021105515A1 (de) |
| WO (1) | WO2022189169A1 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4409300A1 (de) | 1994-03-18 | 1995-09-21 | Schloemann Siemag Ag | Vorrichtung zum Bearbeiten von Walzen während des Walzvorgangs |
| JPH07256791A (ja) * | 1994-03-18 | 1995-10-09 | Isowa Corp | ロータリーダイカッタ |
| DE4437829A1 (de) | 1994-10-14 | 1996-04-18 | Mannesmann Ag | Verfahren und Vorrichtung zum Anstellen der Putzrollen zum Reinigen von Walzen |
| US6609997B1 (en) | 1999-12-23 | 2003-08-26 | Sun Automation Inc. | Method and apparatus for resurfacing anvil blanket of a rotary diecutter for box making machine |
| JP4832693B2 (ja) * | 1999-12-31 | 2011-12-07 | ボイス ペ−パ− パテント ゲ−エムベ−ハ− | 研削盤 |
| CN2680455Y (zh) | 2003-11-13 | 2005-02-23 | 南海市东方纸箱机械实业有限公司 | 纸箱印刷模切机的胶垫自动修磨装置 |
| US8272923B2 (en) | 2009-08-13 | 2012-09-25 | The Procter & Gamble Company | Methods and apparatuses for anvil reconditioning |
| US9435749B2 (en) * | 2013-03-13 | 2016-09-06 | Alcoa Inc. | System and method for inspection of roll surface |
-
2021
- 2021-03-08 DE DE102021105515.6A patent/DE102021105515A1/de active Pending
-
2022
- 2022-02-25 WO PCT/EP2022/054779 patent/WO2022189169A1/de not_active Ceased
- 2022-02-25 EP EP22708906.7A patent/EP4208312A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022189169A1 (de) | 2022-09-15 |
| DE102021105515A1 (de) | 2022-09-22 |
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