WO2024251670A1 - Verfahren und vorrichtung zum lasermarkieren von behältern - Google Patents
Verfahren und vorrichtung zum lasermarkieren von behältern Download PDFInfo
- Publication number
- WO2024251670A1 WO2024251670A1 PCT/EP2024/065215 EP2024065215W WO2024251670A1 WO 2024251670 A1 WO2024251670 A1 WO 2024251670A1 EP 2024065215 W EP2024065215 W EP 2024065215W WO 2024251670 A1 WO2024251670 A1 WO 2024251670A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- container
- containers
- laser
- laser marking
- marking
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
- B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
- B41J3/40733—Printing on cylindrical or rotationally symmetrical objects, e. g. on bottles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
- B41J2/44—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source per colour, e.g. lighting beams or shutter arrangements
- B41J2/442—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source per colour, e.g. lighting beams or shutter arrangements using lasers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
Definitions
- the invention relates to a method for operating a device with a container conveyor and a laser marking system.
- the invention also relates to a device for laser marking containers.
- containers are mostly equipped with labels.
- Typical variants are paper or plastic labels, which are processed with hot or cold glue or self-adhesive and applied to the containers.
- Labels can be problematic in the recycling process, e.g. because of the printing ink used, waterproof paper, glue, etc.
- various features inherent in the technology can be seen as disadvantageous. These include in particular the use of plastics for container decoration, a poor CO2 footprint in label production (especially plastics) through logistics to application (especially shrink sleeves) and limited recyclability in the usual waste streams. Analogous points can also be mentioned for direct printing processes.
- Required information could, for example, be marked or written directly onto the containers using a laser marking system.
- a laser marking system Such technology is already used, for example, to laser mark a production number or a best-before date.
- the laser beam and the heat generated on the surface of the container can cause a physical change to the surface of the container (e.g. stress whitening in PET containers), so that the desired characters can be laser marked onto the surface.
- One aspect of the present disclosure relates to a method for operating a device with a container conveyor and a laser marking system having one or more marking heads for laser marking containers.
- the method comprises specifying a plurality of parameters comprising a depth of field of the laser marking system, a writing speed of the laser marking system and a container distance between two consecutive containers transported by the container conveyor (e.g. by means of an input device from a user).
- the method further comprises determining at least one target operating parameter for the container conveyor depending on the plurality of predetermined parameters (e.g. by means of a processing device).
- the method further comprises operating the device for laser marking the containers by means of the laser marking system, wherein the container conveyor is operated depending on the at least one determined target operating parameter (e.g. by means of a control device).
- the method advantageously enables laser marking of containers with optimized performance and quality.
- the present method also takes the depth of field of the laser marking system into account as a particularly relevant parameter. This makes it possible, for example, to determine the size of a working field of the laser marking system, which is variable depending on the operation of the container conveyor (e.g. container transport speed and container rotation speed).
- the quality of the laser marking e.g. sharpness and readability, especially of fine, for example Asian writing
- the method can be used particularly advantageously for containers whose area to be marked / labeled deviates from a flat surface and is instead, for example, single or multiply curved.
- the process can thus enable the design of attractive decorations without the use of additional packaging material in performance ranges that correspond to or at least come close to current decoration processes.
- the depth of field can indicate a distance between the closest and the furthest point that is imaged or achieved with acceptable sharpness of the laser beam generated by the laser marking system.
- the depth of field can also be referred to as depth of focus.
- the depth of field can be specified in mm, for example.
- the writing speed can be specified, for example, as a character writing speed (e.g. specified as characters per s) or as a feed speed/line writing speed (e.g. specified in mm per s).
- the writing speed can depend on a configuration of the at least one marking head.
- the writing speed can depend, for example, on a dynamic and speed of the drives of the at least one marking head.
- the container spacing can indicate a distance between the container longitudinal axes/container vertical axes of directly consecutive/adjacent containers or between container peripheral surfaces of directly consecutive/adjacent containers that are transported by the container conveyor.
- the container spacing can correspond to a pitch or a pitch distance of the container conveyor.
- the container spacing can be a constant.
- the container spacing can be specified, for example, in mm or as a mm range.
- the container spacing can be, for example, between approx. 80 mm and approx. 400 mm.
- the container spacing can be less than or equal to a maximum width of a marking field of the laser marking system.
- the method may be a computer-aided method.
- the at least one operating parameter can be determined in such a way or the container conveyor can be operated in dependence on the at least one determined operating parameter in such a way that the surface elements or surface sections of the respective container to be laser-marked are preferably positioned perpendicularly or with a maximum of +/-20 0 perpendicular deviation to the laser beam during a respective marking time when passing the laser marking system and the surface elements or surface sections are within the
- the at least one target operating parameter has a target container transport speed or a target container transport speed profile (e.g. a speed profile including acceleration(s) and/or deceleration(s), e.g. time-dependent or path-dependent). This can advantageously be used to determine a maximum target container transport speed for the specified parameters, with which the greatest possible output and the desired quality of the laser markings can be achieved.
- a target container transport speed or a target container transport speed profile e.g. a speed profile including acceleration(s) and/or deceleration(s), e.g. time-dependent or path-dependent.
- the container conveyor is designed to rotate the containers during transport about a respective vertical axis of the containers, preferably by means of container holders, particularly preferably turntables, of the container conveyor. This can advantageously make it possible to enlarge the working window by appropriately rotating the containers.
- the plurality of parameters further comprise a maximum container rotation speed or a maximum container rotation speed profile (e.g. course of a maximum rotation speed including acceleration(s) and/or deceleration(s), e.g. time-dependent or path-dependent) of the containers by means of the container conveyor, and/or the at least one target operating parameter comprises a target container rotation speed or a target container rotation speed profile (e.g. course of a rotation speed including acceleration(s) and/or deceleration(s), e.g. time-dependent or path-dependent) for rotating the containers about a respective vertical axis of the containers.
- a target container rotation speed or a target container rotation speed profile e.g. course of a rotation speed including acceleration(s) and/or deceleration(s), e.g. time-dependent or path-dependent
- a machine model (e.g. simulated and/or empirically determined) representing the device is used when determining the at least one target operating parameter.
- the machine model can depict a kinematics of the container conveyor and a relative arrangement between the one or more marking heads of the laser marking system and the container conveyor.
- the machine model for determining the target operating parameter can make it possible to determine or take into account a change (e.g. dependent on the container transport speed and optionally dependent on the container rotation speed) in the size of a working window that lies in a marking field of the laser marking system and within which a container marking is actually possible when the respective container moves past the marking field due to a geometry of the container, preferably to enable the working window to be maximized.
- the target operating parameters for the container conveyor are determined on the basis of a mathematical model that contains, for example, all relevant data on the kinematics of the device, the geometric/structural situation, the laser's operating mode, the container topology and/or print image information.
- Complex kinematics with superimposed movements of the containers e.g. feed and rotation around the vertical axis
- topological details of the containers can also be taken into account.
- the laser marking system has an adjustable focal length
- the method further comprises determining a target focal length or a target focal length profile for the laser marking system depending on the multiple parameters, wherein the laser marking system is preferably operated depending on the determined target focal length or the determined target focal length profile when operating the device.
- the possibility of adaptively adjusting the focal length advantageously opens up the possibility of using an additional factor to optimize the speed of the container conveyor or the device itself. For example, the (adaptive) change in the focal length can increase the working window and thus significantly increase the output without any loss of quality and the marking quality.
- the machine model is used to determine the target focal length or the target focal length profile.
- the plurality of parameters further comprise a dimension and/or a number of characters of a laser marking to be applied to the containers by the laser marking system, and/or the plurality of parameters further comprise information (e.g. direction, number and/or distance from one another) relating to at least one writing vector of the marking head(s) for a laser marking to be applied to the containers.
- the mode of operation of the laser marking system can thus advantageously be taken into account when determining the target operating parameters.
- the plurality of parameters further comprise a number of the plurality of marking heads, and/or the plurality of parameters further comprise a division of a laser marking to be applied to the containers by the laser marking system into a plurality of sections (e.g. horizontal sections, vertical sections or grid sections), wherein preferably each section is assigned to one of the plurality of marking heads.
- a plurality of sections e.g. horizontal sections, vertical sections or grid sections
- each section is assigned to one of the plurality of marking heads.
- the plurality of parameters further comprise a pitch circle diameter of the container conveyor designed as a rotary conveyor, and/or the plurality of parameters further comprise information about a course of the container conveyor (e.g. information about a straight course or angle of curvature or pitch circle diameter).
- a kinematics of the container conveyor can thus be mapped very precisely and taken into account when determining the target operating parameters, even if this kinematics is comparatively complex, such as in rotary conveyors with rotating container plates.
- the plurality of parameters further comprise a position of the marking head or positions of the marking heads, preferably relative to the container conveyor.
- the plurality of parameters further comprise a distance between the marking head and the containers transported by the container conveyor transversely to a container transport direction or distances between the plurality of marking heads and the containers transported by the container conveyor transversely to a container transport direction. This advantageously also allows the structural conditions to be mapped and taken into account.
- the multiple parameters also include a container diameter, a container shape and/or a container contour of the container. This advantageously makes it possible to achieve quality and output-optimized results adapted to the container topology when determining the target operating parameter(s). Taking the container topology into account can also advantageously reduce losses in the quality of the laser marking and thus above all increase readability even on more complex container geometries.
- the container conveyor has several independently movable movement devices for transporting the containers, preferably driven by a long stator linear motor drive or a planar motor drive.
- the at least one target operating parameter has a target container transport speed profile. This also advantageously makes it possible to exploit the potential of independent mobility of the containers for performance and quality optimization.
- the plurality of parameters further comprise at least one parameter detected during operation of the device by means of a preferably camera-based detection device and/or by means of the laser marking system, namely preferably a, preferably three-dimensional, container surface position of a container to be laser-marked; and/or a, preferably three-dimensional, container orientation of a container to be laser-marked; and/or a distance of a location to be laser-marked of a container to be laser-marked from a lens of the laser marking system.
- the determination of the target operating parameters can therefore be advantageously adjusted in real time or carried out on the fly. This means that, for example, container-specific tolerances can be taken into account and dynamic laser markings - i.e. different contents from container to container - can also be made possible.
- a further aspect relates to a device for laser marking (laser coding) containers.
- the device has a container conveyor for transporting the containers and a laser marking system with at least one marking head which is arranged for laser marking the containers transported by the container conveyor.
- the device also has a computer system (e.g. with an input device, a processing device and/or a control device) which is configured to carry out a method according to one of the preceding claims.
- the device can achieve the same advantages as have already been described with reference to the method.
- the device can be included in a container treatment plant for producing, cleaning, coating, testing, filling, closing, equipping and/or packaging containers for liquid media, preferably beverages or liquid foodstuffs.
- a container treatment plant for producing, cleaning, coating, testing, filling, closing, equipping and/or packaging containers for liquid media, preferably beverages or liquid foodstuffs.
- the containers can be designed as bottles, cans, canisters, cartons, flacons, etc.
- control device and “processing device” can refer to electronics (e.g. designed as a driver circuit or with microprocessor(s) and data memory) which, depending on the design, can take on control tasks and/or regulation tasks and/or processing tasks. Even if the term “control” is used here, it can also appropriately include or mean “regulation” or “control with feedback” and/or “processing”.
- control device and “processing device” can refer to electronics (e.g. designed as a driver circuit or with microprocessor(s) and data memory) which, depending on the design, can take on control tasks and/or regulation tasks and/or processing tasks. Even if the term “control” is used here, it can also appropriately include or mean “regulation” or “control with feedback” and/or “processing”.
- Figure 1 is a schematic representation of an exemplary laser marking system
- Figure 2 is a perspective view of an exemplary laser marking process
- Figure 3 is a schematic representation of a method for operating a device for laser marking containers
- Figure 4 shows a section of a visualization of an exemplary machine model
- Figure 5 shows a section of a visualization of an exemplary machine model
- Figure 6 shows a section of a visualization of an exemplary machine model
- Figure 7 shows a section of a visualization (side view) of an exemplary machine model
- Figure 8 shows a section of a visualization (top view) of an exemplary machine model.
- Figure 1 shows a laser marking system 10 for laser marking containers 12.
- the laser marking system 10 can also be referred to as a laser marking system, laser coding system or laser inscription system.
- the laser marking system 10 can preferably be a CO2 laser marking system, a fiber laser marking system or a UV laser marking system.
- the laser marking system 10 may comprise a laser source 14 and a marking head 16.
- the laser source 14 can be designed as a laser tube, for example.
- the laser tube can be sealed.
- the laser tube can be filled with a gas, e.g. containing CO2, or a gas mixture, e.g. CO2-N2-He gas mixture.
- Electrodes can also be arranged in the laser tube.
- a supply unit can be connected to the electrodes (not shown in Figure 1).
- the supply unit can supply the laser source 14 with electrical energy.
- molecules, e.g. CO2 molecules in the laser tube can be excited to oscillate and thus to emit a laser beam.
- the laser source 14 can also be referred to as an oscillator.
- the laser beam generated by the laser source 14 can be guided or directed to the marking head 16 directly or via mirrors. It is possible that, for example, a so-called telescope for expanding the laser beam is arranged between the laser source 14 and the marking head 16.
- the marking head 16 can preferably have two movable mirrors 18 and 22 and two drives 20 and 24.
- the marking head 16 can also have a focusing lens 26.
- the marking head 16 can also be referred to as a coding head, identification head or writing head.
- the first drive 20 can rotate the first mirror 18 about a first axis (e.g. x-axis).
- the first mirror 18 can also be referred to as a movable scanner mirror, e.g. X-scanner mirror.
- the second drive 24 can rotate the second mirror 22 about a second axis (e.g. y-axis).
- the second mirror 22 can also be referred to as a movable scanner mirror, e.g. Y-scanner mirror.
- the first axis and the second axis can preferably run perpendicular to one another.
- the mirrors 18, 22 moved by the drives 20, 24 can direct the laser beam according to the desired laser marking.
- the laser beam can thus, for example, write over the surface of the container 12.
- the laser beam can move over the surface of the container 12 within the marking field 32 (see Figure 2) which is assigned to the respective marking head 16.
- the focusing lens 26 can also be referred to as a condenser lens.
- the focusing lens 26 can be an F-Theta lens, for example.
- the focusing lens 26 can be arranged inside or outside the marking head 16.
- the laser marking system 10 can have a plurality of marking heads 16.
- the plurality of marking heads 16 can, for example, be arranged side by side and/or one above the other. For example, two, three or more marking heads 16 can be included.
- Each marking head 16 can be connected to its own laser source 14, which can emit a laser beam to the respective marking head 16. Accordingly, the laser marking system 10 can have multiple laser sources 14.
- a beam distributor can be arranged between the laser source 14 and several marking heads 16.
- the beam distributor can, for example, split a laser beam received from the laser source 14 into several laser beams and guide them to the several marking heads 16.
- laser sources 14 can be of identical construction, for example. However, it is also possible for the laser sources 14 to be at least partially designed differently in order to be able to produce different effects (e.g. color effects) when laser marking the containers 12.
- Figure 2 shows a purely schematic and exemplary device 28 for laser marking.
- the part of the device 28 shown has a marking head 16.
- the laser marking system 10 can also have several marking heads 16, etc.
- the part of the device 28 shown also has a container conveyor 34.
- the arrangement and design of the focusing lens 26 can define a so-called focusing field or lens field 30.
- the lens field 30 can be two-dimensional.
- the lens field 30 has a circular shape.
- the lens field 30 can lie in a vertical plane.
- the laser marking system 10 can be designed for laser marking within at least one so-called marking field 32.
- the marking field 32 can be a section of the lens field 30.
- the section or the marking field 32 can include all positions that the laser beam can reach through the movable mirror(s) of the marking head 16.
- the laser marking system 10 can laser mark the area.
- the laser marking system 10 can no longer laser mark the area.
- a shape and a dimension of the marking field 32 depend on the mirrors 18, 22 and their mobility caused by the drives 20, 24 (see Figure 1).
- the marking field 32 can be two-dimensional.
- the marking field 32 can have a rectangular shape, preferably a square shape.
- the marking field 32 can preferably lie in a vertical plane.
- Each marking head 16 can form or define its own marking field 32 within the respective lens field 30.
- Multiple marking fields 32 can be at least partially spaced apart from one another and/or at least partially adjacent to one another or overlap one another.
- the laser marking system 10 can have an adjustable focal length.
- the at least one focusing lens 26 and optionally the at least one marking head 16 can be adjustable by means of a preferably motorized adjustment device (not shown separately in Figure 2) in a horizontal plane in a direction perpendicular to a path of the container conveyor 34 and/or perpendicular to the transport direction T in order to adjust a focal length of the laser marking system 10. If there are several focusing lenses 26, these and optionally the associated marking heads 16 can be adjusted, for example, jointly or independently of one another by means of the adjustment device.
- the container conveyor 34 is designed to transport containers 12.
- the container conveyor 34 can transport the containers 12 in a transport direction T. Depending on the configuration of the container conveyor 34, it can transport the containers on a desired transport path.
- the transport path can be, for example, a linear transport path or a curved or arched transport path.
- the container conveyor 34 can be a rotary container conveyor (container conveyor carousel).
- the laser marking system 10 can, for example, be arranged inside or outside the rotary container conveyor. It is also possible for the laser marking system 10 to be arranged partially inside and partially outside the rotary container conveyor.
- the at least one laser source 14 can be arranged inside the rotary container conveyor and the at least one marking head 16 can be arranged outside the rotary container conveyor.
- the container conveyor 34 can be a linear container conveyor, for example.
- the laser marking system 10 can be arranged to the side of the linear container conveyor, for example.
- the linear container conveyor can have, for example, a preferably rotating conveyor element for transporting the containers 12.
- the linear container conveyor can be, for example, a belt, strap, chain or plate conveyor. It is also possible for the linear container conveyor to be designed as a long stator linear motor container conveyor or (magnetic) planar motor drive container conveyor, which can move the containers 12 independently of one another by means of movement devices (mover, shuttle).
- the container conveyor 34 can support the containers 12 during transport, preferably on the bottom side, the circumference side and/or the mouth side.
- the container conveyor 34 can have container holders 36 (only indicated schematically in Figure 2) for supporting the containers 12.
- the container holders 36 can hold the containers 12 preferably in base handling or neck handling.
- the container conveyor 34 does not have any separate container holders 36 and, for example, the containers 12 are simply supported on a preferably rotating conveyor element (e.g. belt, strap, chains or plates) of the container conveyor 34.
- a preferably rotating conveyor element e.g. belt, strap, chains or plates
- the container holders 36 can each support a container 12.
- the container holders 36 can, for example, each have a container plate, a centering bell, a container clamp and/or an inflation device.
- the container conveyor 34 can be designed to rotate the transported containers 12 about their own vertical axis.
- the container holders 36 can be rotatable for rotating the containers 12 about their respective vertical axis.
- the device 28 may further comprise a detection device 38.
- the detection device 38 can be directed at the container conveyor 34 or at the containers 12 transported by the container conveyor 34.
- the detection device 38 can be arranged upstream of the laser marking system 10 with respect to the transport direction T of the container conveyor 34 or can be integrated into the laser marking system 10.
- the detection device 38 can, for example, have a camera device, an LED detection device or a laser detection device.
- the detection device 38 can, for example, have a, preferably three-dimensional, container surface position, a, preferably three-dimensional, container orientation and/or a distance of a location to be laser-marked on a container 12 to be laser-marked from the focusing lens 26 of the laser marking system 10.
- Figure 3 shows a purely schematic method for operating the device 28.
- the method can be used, for example, when putting the device 28 into operation, when the device 28 is in operation and/or when the device 28 is converted (e.g. due to a change in container format).
- various parameters can be specified.
- the parameters can be specified using a user input device. It is also possible, for example, for the parameters to be received using a communication interface, e.g. from a server.
- step S10 Particularly relevant parameters specified in step S10 are a depth of field of the laser marking system 10, a writing speed of the laser marking system 10 and a container distance between two consecutive containers 12 transported by the container conveyor 34.
- further parameters can preferably be specified if desired.
- the further parameters can, for example, include at least one of: a maximum container rotation speed or a maximum rotation speed profile of the containers 12 (for rotation about their own vertical axis) by means of the container conveyor 34 or the rotatable container holders 36; a maximum container transport speed of the container conveyor 34; a dimension and/or a number of characters of a laser marking to be applied to the containers 12 by the laser marking system 10 (e.g. laser inscription and/or laser decoration);
- Information(s) about writing vectors of the marking head(s) 16 for a laser marking to be applied to the containers 12 e.g. laser inscription and/or laser decoration
- a number of the multiple marking heads 16 a division of a laser marking to be applied to the containers 12 by the laser marking system 10 into a plurality of sections, wherein each section is preferably assigned to one of the multiple marking heads 16; a position of the marking head 16 or positions of the marking heads 16, preferably relative to the container conveyor 34; a container diameter, a container shape and/or a container contour of the containers 12; a, preferably three-dimensional, container surface position of a container 12 to be laser marked; a, preferably three-dimensional, container orientation of a container 12 to be laser marked; a distance of a point to be laser marked of a container 12 to be laser marked to a focusing lens 26 of the laser marking system 10; a desired angle of incidence at which a laser beam emitted by the laser marking system 10 is to strike a surface of the container 12.
- the predetermined parameters can be processed to determine at least one target operating parameter for the device 28.
- the at least one target operating parameter can have a target container transport speed or a target container transport speed profile/progression for the container conveyor 34 for transporting the containers 12 and/or a target container rotation speed or target container rotation speed profile for the container conveyor 34 for rotating the containers 12 about their respective vertical axis (e.g. by means of the container holders 36).
- the at least one target operating parameter can also have, for example, a target focal length for the laser marking system 10.
- the step S12 can be carried out, for example, by means of a computer-aided processing device, e.g. remotely or on-site in a container treatment plant with the device 28.
- step S12 for example, predetermined algorithms, lookup tables, characteristic maps, characteristic curves, etc. can be used, which were determined, for example, empirically through tests and/or simulations.
- a machine model of the device 28 or a machine model representing the device 28 can be used to determine the at least one target operating parameter.
- the machine model is preferably a mathematical machine model.
- the machine model can take into account a kinematics of the container conveyor 34 and a relative arrangement between the one or more marking heads 16 of the laser marking system 10 and the container conveyor 34.
- the machine model can be a simulation model.
- the machine model can contain all relevant data on the kinematics of the device 28, the geometric/structural situation of the device 28, the method of operation of the laser marking system 10, the container topology of the containers 12 and laser marking image information(s).
- the machine model can be determined empirically through tests and/or simulations.
- the machine model can be a Kl machine model that has, for example, an artificial neural network.
- the Kl machine model can be supplied with training data for the initial training of the Kl machine model.
- the training data can have several parameter sets with different values for the specified parameters as well as a suitable value, an optimal value and/or an unsuitable value for the at least one target operating parameter for the respective parameter set.
- This training data for the initial training of the Kl machine model can be determined, e.g. read out, in tests, simulations and/or from historical operating data of other devices with container conveyors and laser marking systems. It is also possible for certain dependencies of the specified parameters on one another and/or certain basic conditions to be specified as training data.
- the Kl machine model can also be self-learning during operation of the device 28, so that, for example, an entered user feedback or a manual or automatic evaluation of the quality of the laser markings on the containers based on recordings of the laser markings on the containers 12 is taken into account in connection with the stored, associated at least one target or actual operating parameter for the container conveyor 34 and/or the laser marking system 10.
- the device 28 for laser marking the containers 12 can be operated by means of the laser marking system 10.
- the container conveyor 34 can be operated depending on the determined target container transport speed or the determined target container transport speed profile and, if applicable, on the target container rotation speed or the determined target container transport speed profile determined in step S12.
- the laser marking system 10 can, if applicable, be operated depending on the determined target focal length.
- Figures 4ff show exemplary sections and visualizations of the machine model.
- Figures 4 and 5 show a machine model with a representation of the laser marking system (marked with the reference numeral 10'), with representations of the containers (marked with the reference numeral 12'), a representation of the container conveyor (marked with the reference numeral 34') and, by way of example only in Figure 5, a representation of the container holders (marked with the reference numeral 36').
- a depth of field DOF, a distance d between successive containers 12' and a writing speed of the laser marking system 10' can be specified in the machine model.
- a pitch circle diameter t (see Figure 5) and/or a maximum container rotation speed of the container holders 36' (also see Figure 5) can also be specified in the machine model.
- a target container transport speed can be determined from the specified parameters using the machine model. If the containers 12' can be moved independently of one another in the transport direction, e.g. by using a long stator linear motor drive or a planar motor drive, a target container transport speed profile can preferably be determined.
- the target container transport speed profile can indicate a transport speed profile of the container in the transport direction as it moves past the laser marking system 10.
- a target container rotation speed or a target container rotation speed profile for the rotatable container holders 36' can also be determined using the machine model.
- the machine model can in particular enable a change in the size of a working window A (see Figures 4 and 5) that lies in a marking field 32 (see Figure 2) of the laser marking system 10 and within which a container marking is actually possible when the respective container 12 moves past the marking field 32 to be determined.
- the change in size depends on the container transport speed and optionally depends on the container rotation speed.
- Complex kinematics can also be taken into account in the machine model, e.g. if the containers 12' are modeled as being rotatable about their own vertical axis and the container conveyor 34' is modeled as a rotary conveyor.
- the machine model can take into account the superposition between transport movement/feed movement, e.g. linear or on a circular path, and rotary movement of the containers 12'.
- the laser marking system 10 has a (given) marking field 32 in which the laser beam can be moved via mirrors 18, 22.
- the actual working window A of the laser marking system 10' is, however, smaller than this marking field 32 and can result from the writing speed of the laser marking system 10' and the available depth of field DOF.
- a clever coordination of the (target) container transport speed and, if applicable, the (target) container rotation speed can lead to the laser marking system 10' being given more time within its marking field 32 and thus generating the largest possible working window A.
- the working window A corresponds to the marking field 32. It is preferably to ensure that the working point of the laser marking system 10' remains in the depth of field.
- the distance (e.g. machine pitch) d can also be selected such that the laser beam, after reaching the end of the working field, jumps as seamlessly as possible to the beginning of the working field of the next container 12 to be written on.
- this distance d it is possible for this distance d to be variable, e.g. by using flexibly movable movement devices for moving the containers 12.
- the machine model enables, by means of mathematical procedures, maximum values or maximum profiles for the target container transport speed or the target container transport port speed profile and, if applicable, the target container rotation speed or the target container rotation speed profile, taking into account the specified parameters, with which the desired laser marking is made possible.
- the machine model can enable individual predefined parameters to be changed in order to determine their influence on the determination of the target container transport speed or the target container transport speed profile and, if applicable, the target container rotation speed or the target container rotation speed profile.
- Figure 6 shows by way of example that the machine model can enable a modeling of a distribution of a laser marking L to be applied to the containers 12 between several marking heads 16.
- the laser marking L can be divided into several (e.g. two or three) sections LI, L2 and L3.
- the first section LI can be assigned to a first marking head 16 of the laser marking system 10.
- the second section L2 can be assigned to a second marking head 16 of the laser marking system 10, etc.
- the multiple sections LI, L2, L3 can be arranged one above the other or in rows.
- the multiple sections LI, L2, L3 can extend parallel.
- longitudinal axes of the multiple sections LI, L2, L3 can extend horizontally.
- the multiple sections LI, L2, L3 can be arranged side by side or in columns (not shown in Figure 6).
- the longitudinal axes of the multiple sections LI, L2, L3 can extend vertically, preferably parallel.
- the multiple sections LI, L2, L3 are arranged in a grid, e.g. row-wise and column-wise, e.g. checkerboard-like (not shown in Figure 6).
- the plurality of sections LI, L2, L3 can be formed such that no graphic characters or elements are separated at a boundary between two sections.
- Figures 7 and 8 show by way of example that the machine model can also make it possible to take into account an adjustable focal length of the laser marking system 10.
- Laser marking systems usually work with a flat field optics that enables a planar, non-curved focal plane at a defined distance from the laser marking system.
- the distance between the laser marking system and this focal plane is the focal length.
- the machine model can make it possible to take into account an adjustable focal length of the laser marking system 10.
- the laser marking system 10 can preferably make it possible to dynamically change the focal length and thus the distance of the focal plane (or the focal field 30 - see Figure 2) similar to a zoom lens.
- a target focal length can be determined in order to adapt the laser marking with the specified depth of field DOF (see Figures 4 and 5) to a topology of the containers 12.
- the machine model can be used to output a target focal length depending on the distance of a specific point on the container surface from the laser marking system 10, with which the focus point can be controlled or regulated depending on, among other things, the container geometry and information about writing vectors (e.g. path of the writing process, direction, number, etc.) of the laser marking system.
- This relationship can be applied to the entire working window A (see Figures 4 and 5), i.e. on a 2-dimensional plane.
- a target focal length profile can also be determined, which can have different target focal lengths for laser marking that can be set one after the other (e.g. time- or path-dependent).
- the determination of the target focal length or the target focal length profile and their application in the operation of the device 28 can be based, for example, on theoretical data (target container data) and/or data measured during operation (actual container data).
- target container data data measured during operation
- actual container data data measured during operation
- geometry data relating to the container 12 to be laser-marked can be recorded in real time using the recording device 38 and/or the laser marking system 10 itself.
- a distance to the surface of the container 12 to be written on can be recorded and the (optimal) target focal length or the (optimal) target focal length profile can then be automatically determined using the machine model and then adjusted during operation.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202480037635.0A CN121263310A (zh) | 2023-06-05 | 2024-06-03 | 用于对容器进行激光标记的方法和设备 |
| EP24730984.2A EP4719774A1 (de) | 2023-06-05 | 2024-06-03 | Verfahren und vorrichtung zum lasermarkieren von behältern |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023114685.8 | 2023-06-05 | ||
| DE102023114685.8A DE102023114685A1 (de) | 2023-06-05 | 2023-06-05 | Verfahren und Vorrichtung zum Lasermarkieren von Behältern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024251670A1 true WO2024251670A1 (de) | 2024-12-12 |
Family
ID=91376733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/065215 Ceased WO2024251670A1 (de) | 2023-06-05 | 2024-06-03 | Verfahren und vorrichtung zum lasermarkieren von behältern |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4719774A1 (de) |
| CN (1) | CN121263310A (de) |
| DE (1) | DE102023114685A1 (de) |
| WO (1) | WO2024251670A1 (de) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100095723A1 (en) * | 2008-10-16 | 2010-04-22 | The Coca-Cola Company | Method of shape forming vessels controlling rotational indexing |
| CN202754176U (zh) * | 2012-08-31 | 2013-02-27 | 安徽圣雷科技发展有限公司 | 异形瓶自动理料定向输送机构 |
| EP2960057A1 (de) * | 2014-06-25 | 2015-12-30 | Sidel S.p.a. Con Socio Unico | Vorrichtung und Verfahren zur Dekoration der Oberfläche von irregulär geformten Behältern |
| CN207140556U (zh) * | 2017-06-05 | 2018-03-27 | 广州市申发机电有限公司 | 一种全自动六色十六工位数码旋转印刷检测一体机 |
| US20220072853A1 (en) * | 2018-12-24 | 2022-03-10 | Yuan Chang | A printing method for inkjet printers |
| EP4074455A2 (de) * | 2021-02-25 | 2022-10-19 | Ricoh Company, Ltd. | Markierungsvorrichtung, medium, behälter und markierungsverfahren |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8906578U1 (de) * | 1989-05-29 | 1990-09-27 | Siemens AG, 1000 Berlin und 8000 München | Laserbearbeitungsvorrichtung |
| ES2380480B8 (es) * | 2010-04-21 | 2013-11-14 | Macsa Id, S.A. | Dispositivo y procedimiento para marcar mediante laser un objeto en movimiento. |
| FR3087367B1 (fr) * | 2018-10-22 | 2020-11-06 | Tiama | Procede et installation pour le marquage de recipients chauds en verre |
-
2023
- 2023-06-05 DE DE102023114685.8A patent/DE102023114685A1/de active Pending
-
2024
- 2024-06-03 CN CN202480037635.0A patent/CN121263310A/zh active Pending
- 2024-06-03 EP EP24730984.2A patent/EP4719774A1/de active Pending
- 2024-06-03 WO PCT/EP2024/065215 patent/WO2024251670A1/de not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100095723A1 (en) * | 2008-10-16 | 2010-04-22 | The Coca-Cola Company | Method of shape forming vessels controlling rotational indexing |
| CN202754176U (zh) * | 2012-08-31 | 2013-02-27 | 安徽圣雷科技发展有限公司 | 异形瓶自动理料定向输送机构 |
| EP2960057A1 (de) * | 2014-06-25 | 2015-12-30 | Sidel S.p.a. Con Socio Unico | Vorrichtung und Verfahren zur Dekoration der Oberfläche von irregulär geformten Behältern |
| CN207140556U (zh) * | 2017-06-05 | 2018-03-27 | 广州市申发机电有限公司 | 一种全自动六色十六工位数码旋转印刷检测一体机 |
| US20220072853A1 (en) * | 2018-12-24 | 2022-03-10 | Yuan Chang | A printing method for inkjet printers |
| EP4074455A2 (de) * | 2021-02-25 | 2022-10-19 | Ricoh Company, Ltd. | Markierungsvorrichtung, medium, behälter und markierungsverfahren |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4719774A1 (de) | 2026-04-08 |
| CN121263310A (zh) | 2026-01-02 |
| DE102023114685A1 (de) | 2024-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE60028995T2 (de) | Laser-markierungsgerät | |
| EP2029442B1 (de) | Verfahren sowie vorrichtung zum bedrucken von behältern | |
| EP0176872B1 (de) | Einrichtung zum berührungslosen Verändern der Oberfläche eines Gegenstandes | |
| DE69019570T2 (de) | Verfahren und Vorrichtung zur Herstellung von dreidimensionalen Objekten. | |
| EP0713433B2 (de) | Verfahren zum gravieren eines musters in eine oberfläche eines werkstücks | |
| DE102008051791A1 (de) | Verfahren sowie Vorrichtung zum Ausstatten von Behältern | |
| DE102017218814B4 (de) | Beschriftungseinrichtung und Verfahren zur Beschriftung eines Werkstücks | |
| DE3786062T2 (de) | Bearbeitung von Werkstücken. | |
| EP3426495B1 (de) | Vorrichtung zum bedrucken von verschlüssen verschlossener behälter | |
| DE4322252A1 (de) | Verfahren zur Kennzeichnung von Eiern auf der Eierschale sowie Vorrichtung zur Durchführung des Verfahrens | |
| DE102009058212A1 (de) | Anlage zum Bedrucken von Behältern | |
| DE102018121570A1 (de) | Verzerrungsfreie Beschichtung von Fahrzeug Interieur-Oberflächen | |
| EP0653791A1 (de) | Vorrichtung zum Beschriften von Werkstücken | |
| DE29514319U1 (de) | Vorrichtung zum Beschriften von Gegenständen | |
| DE4324970A1 (de) | Verfahren zur Herstellung einer Prägewalze zum kontinuierlichen Prägen der Oberfläche einer thermoplastischen Folie mit einem Muster | |
| EP4719774A1 (de) | Verfahren und vorrichtung zum lasermarkieren von behältern | |
| DE3712554A1 (de) | Etikettiergeraet mit druckwerkkontrolle | |
| EP0291461A1 (de) | Verfahren und Vorrichtung zum Erzeugen einer Markierung an einem Werkstück | |
| EP0446482A1 (de) | Verfahren zum Beschriften oder Markieren | |
| DE102024128858A1 (de) | Verfahren und Vorrichtung zum Lasermarkieren von Objekten mit einer gekrümmten Fläche | |
| DE10148759C2 (de) | Verfahren zur Erzeugung einer Lasergravur in eine Oberfläche eines Substrates | |
| EP4719775A1 (de) | Vorrichtung und verfahren zum lasermarkieren von behältern | |
| DE3713502A1 (de) | Vorrichtung zum gesteuerten ablenken eines lichtstrahles | |
| EP4442464A2 (de) | Verfahren und vorrichtung zur korrektur einer druckvorlage zum bedrucken von behältern | |
| EP4714662A1 (de) | Vorrichtung und verfahren zum markieren von behältern, maschine zur lasercodierung und anlage zum herstellen und/oder behandeln von behältern |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 24730984 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2024730984 Country of ref document: EP Effective date: 20260105 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2024730984 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 2024730984 Country of ref document: EP Effective date: 20260105 |
|
| ENP | Entry into the national phase |
Ref document number: 2024730984 Country of ref document: EP Effective date: 20260105 |
|
| ENP | Entry into the national phase |
Ref document number: 2024730984 Country of ref document: EP Effective date: 20260105 |
|
| ENP | Entry into the national phase |
Ref document number: 2024730984 Country of ref document: EP Effective date: 20260105 |
|
| ENP | Entry into the national phase |
Ref document number: 2024730984 Country of ref document: EP Effective date: 20260105 |
|
| WWP | Wipo information: published in national office |
Ref document number: 2024730984 Country of ref document: EP |