EP4137417A1 - Packaging machine with film transport device and method - Google Patents
Packaging machine with film transport device and method Download PDFInfo
- Publication number
- EP4137417A1 EP4137417A1 EP22185621.4A EP22185621A EP4137417A1 EP 4137417 A1 EP4137417 A1 EP 4137417A1 EP 22185621 A EP22185621 A EP 22185621A EP 4137417 A1 EP4137417 A1 EP 4137417A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive unit
- run
- packaging machine
- temperature
- during
- 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.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B57/00—Automatic control, checking, warning, or safety devices
- B65B57/02—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages
- B65B57/08—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages and operating to stop, or to control the speed of, the machine as a whole
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B41/00—Supplying or feeding container-forming sheets or wrapping material
- B65B41/12—Feeding webs from rolls
- B65B41/16—Feeding webs from rolls by rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B41/00—Supplying or feeding container-forming sheets or wrapping material
- B65B41/12—Feeding webs from rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B57/00—Automatic control, checking, warning, or safety devices
- B65B57/02—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages
- B65B57/04—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages and operating to control, or to stop, the feed of such material, containers, or packages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
- B65B9/04—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
- B65H23/1888—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling web tension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
- B65H23/192—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web motor-controlled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2513/00—Dynamic entities; Timing aspects
- B65H2513/10—Speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
- B65H2515/30—Forces; Stresses
- B65H2515/32—Torque e.g. braking torque
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
- B65H2515/40—Temperature; Thermal conductivity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
- B65H2557/20—Calculating means; Controlling methods
- B65H2557/24—Calculating methods; Mathematic models
- B65H2557/242—Calculating methods; Mathematic models involving a particular data profile or curve
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
- B65H2557/60—Details of processes or procedures
- B65H2557/63—Optimisation, self-adjustment, self-learning processes or procedures, e.g. during start-up
Definitions
- the present invention relates to a packaging machine according to claim 1.
- the invention further relates to a method according to claim 8.
- packaging material is an essential customer requirement that packaging machine manufacturers are increasingly confronted with. This means that increasingly thin films are to be used and the film waste during the packaging process, in particular a film edge strip that is not processed into packaging, must be minimized.
- servo drives are already used on packaging machines, for example on intermittently operating deep-drawing packaging machines or on tray sealing machines, to control film pickups and residual film winders.
- By means of such servo drives it is possible to control the film tension by specifying a torque. This gives the customer the opportunity to adjust the film tension individually, which means that thin films can be transported more easily and only very narrow film edge strips remain in the production of packaging.
- the conventional torque setting control can be influenced by disturbances occurring during a packaging process, for example due to a changing operating temperature and/or due to varying servomotor speeds, in such a way that no consistent and reproducible film tension is achieved during the packaging process.
- the object of the invention is to provide a packaging machine and a method with which the processing of thin film material is better possible.
- the invention relates to a packaging machine that has a film transport device and a control device for controlling an operation of at least one drive unit of the film transport device.
- the packaging machine according to the invention is in particular in the form of a thermoforming packaging machine or in the form of a tray sealing machine, which is also called a "tray sealer" in technical circles.
- control device is designed to control the drive unit during a production run of the packaging machine on the basis of a speed-dependent and/or temperature-dependent friction torque characteristic recorded using a rotary-driven measuring run performed by the drive unit.
- the measuring run carried out by the drive unit takes place separately from the production run, i.e. separately from the packaging process of the packaging machine.
- the measurement run is used to determine an operationally varying inherent friction that can be measured on the drive unit.
- the measuring run thus takes place as a friction determination run as the basis for the actual production run to be carried out using the packaging machine.
- the characteristic course of the inherent friction that can be measured at the drive unit can be derived, for example, proportionally from a power supply that is required for the measurement run and is detected at the drive unit.
- the friction torque characteristic obtained in this way is then taken into account during the actual production run when controlling the drive unit in order to maintain the desired film tension consistently, i.e. without tension fluctuations, despite the varying inherent friction torque of the drive unit.
- the inherent friction of the drive unit detected by the measuring run can be compensated during the production run in such a way that a constant film tension is achieved during the production run.
- the characteristic friction torque curve recorded for the drive unit by means of the measurement run carried out on it which can be determined, for example, directly proportional to a speed-dependent energization of the drive unit recorded during the measurement run, it is possible to record the drive unit's own friction and use this as a basis in the control of the drive unit during the production run that runs separately, in particular immediately afterwards or only later, in order to achieve a constant film tension to consider.
- the measurement run carried out for the production run thus serves to record the friction dynamics of the drive unit, taking into account the control during the production run, in order to prevent the film material from being subjected to fluctuating stress. As a result, very thin films can be reliably processed into perfect packaging.
- the measuring run can be carried out as a speed-dependent, ie speed-dependent, friction determination run in order to determine the internal friction of the drive unit. It is advisable to carry out the measuring run without foil material.
- the measuring run can be carried out as a function of the operating hours, for example at certain intervals, in order to take account of the current internal friction of the drive unit. It is conceivable that a measurement run function for carrying out the measurement run can be called up by an operator on the packaging machine, for example on an operating terminal provided there.
- the film transport device can be an upper film transport device for transporting an upper film and/or a lower film transport device for transporting a lower film, by means of which the upper film and/or lower film can be fed to a working process taking place on the packaging machine under a desired film tension during the production run of the packaging machine.
- the upper film transport device is designed to feed the upper film to a sealing station of a thermoforming packaging or tray sealing machine.
- the lower film transport device can be used on a thermoforming packaging machine in order to feed the lower film to a forming station of the thermoforming packaging machine.
- the drive unit preferably has a servo drive.
- This can include a servo motor and a servo controller, which dynamically controls the operation of the drive unit on the basis of the friction torque characteristic in order to achieve a constant film tension during the production run.
- the friction torque characteristic in particular that on which the friction torque characteristic is based
- Power supply of the drive unit can be connected to the servo drive, in particular the servo controller, to compensate for the inherent friction of the drive unit as a disturbance variable-dependent characteristic curve pre-control and/or as disturbance variable injection.
- the drive unit has a gear, in particular a gear with a plurality of gear stages.
- the gearbox as well as the servo motor have their own individual friction, which can influence the film tension.
- the respective friction torques can be determined cumulatively for the drive unit using the measurement run and can thus be systematically taken into account when controlling the drive unit using the resulting friction torque characteristic curve.
- the drive unit can be controlled over an entire speed range of the drive unit in order to record the friction torque characteristic.
- the drive unit could be gradually accelerated from standstill during the measurement run until it reaches the maximum speed. This allows the drive unit's own friction, for example at different speed levels, to be recorded over the entire speed range and used as a basis for controlling the drive unit during the production run.
- the result of the friction determination run could be saved by means of an electronic memory unit of the control device in order to be used for packaging processes of the packaging machine in the future.
- the drive unit can be accelerated during the measuring run in order to record the friction torque characteristic by means of stepwise, continuously increasing speed levels, i.e. by means of increasingly faster speed levels.
- the frictional torque can be reliably detected based on the increasing speed levels, in particular when an essentially constant current flow can be measured for the respective speed levels. This is illustrated by a plateau in the power curve.
- control device it would be conceivable for the control device to have a filter function in order to briefly filter out power peaks occurring at the beginning of a speed level set during the measurement run due to the increase in speed.
- the characteristic friction torque curve of the drive unit results from the power supply of the drive unit recorded during the measurement run, in particular in a directly proportional relationship. It is conceivable that the control device is configured to produce an interpolated friction torque characteristic curve from a large number of the friction torques recorded during the measuring run.
- control device is designed to determine a measurement run temperature of the drive unit that is driven in rotation during the measurement run.
- the drive unit in particular a servomotor configured thereon, can have at least one temperature sensor, by means of which the measuring run temperature can be recorded during the friction determination run.
- the temperature sensor can preferably be used during the production run to measure a current operating temperature of the drive unit.
- An expedient variant provides that the measurement run is carried out in such a way that the friction torque characteristic curve is recorded during a constant measurement run temperature.
- a measuring run temperature in the range from 3°C to 8°C, in particular from 5°C to 6°C, is suitable for determining the associated friction torque characteristic.
- the control device can select a time window for the measurement run in such a way that the measurement run can be carried out with a constant measurement run temperature. It has proven to be practical that the measuring run is carried out at a constant measuring run temperature of 5°C.
- control device is configured to, on the basis of at least one frictional torque-temperature characteristic curve held available to the control device for the drive unit, derive a temperature compensation factor for the control with regard to a currently recorded operating temperature of the drive unit and with regard to the measurement run temperature recorded during the measurement run of the drive unit.
- control device is designed to correct the speed-dependent friction torque characteristic curve determined by means of the measuring run, in particular a power supply required for the drive unit that can be derived from this to achieve a desired film tension, using the temperature compensation factor determined with regard to the operating temperature currently present at the drive unit.
- the temperature compensation factor determined with regard to the operating temperature currently present at the drive unit.
- the friction torque-temperature characteristic only needs to be determined once for the drive unit, ie for its modular structure. It would be conceivable for the friction torque-temperature characteristic to be determined with regard to the respective functional units of the drive unit.
- the temperature compensation factor can be derived as a temperature-dependent quotient from the frictional torque-temperature characteristic kept available to the control device for the respective drive unit.
- the quotient is formed from the friction torque displayed for the current operating temperature and the friction torque displayed from this with regard to the measurement run temperature in view of the friction torque-temperature characteristic.
- the temperature compensation factor determined for the current operating temperature and for the measurement run temperature of the drive unit can be used to continuously derive a power supply that is assumed based on the friction torque characteristic and actually required for the current operating temperature, in order to ensure a power supply during the production run despite the increasing operating temperature of the drive unit to achieve constant film tension.
- the power torque actually required to achieve the desired film tension decreases proportionally, which means that temperature influences on the friction behavior of the drive unit can be compensated for.
- a constant and reproducible film tension can advantageously be achieved during the production run, even with a varying operating temperature of the drive unit, so that the use of very thin films is made possible.
- the packaging machine can be designed as a thermoforming packaging machine or as a tray sealing machine.
- the film transport device could be in the form of an upper film transport device in order to feed an upper film to a sealing station of the thermoforming packaging machine with a desired film tension.
- Such an upper film transport device can be designed in a comparable manner on the tray sealing machine.
- the film transport device preferably has at least one additional drive unit, with the control device being designed to control the additional drive unit during a production run of the packaging machine on the basis of a speed- and/or temperature-dependent additional frictional torque characteristic recorded using a rotary-driven measuring run carried out by means of the additional drive unit head for.
- the two drive units can thus be operated on the basis of the inherent friction present on them in such a way that they jointly transport the film clamped between them with uniform and reproducible film tension during the production run.
- the film transport device could be a lower film transport device on the thermoforming packaging machine in order to feed a lower film stored in the production direction at the entrance of the thermoforming packaging machine by means of a desired film tension to a forming station positioned downstream for the production of troughs.
- the desired film tension can be achieved in that a dynamic control of the drive unit of a film roll holder mounted at the inlet of the thermoforming packaging machine based on the friction torque characteristic and a dynamic control of the further drive unit based on the further friction torque characteristic takes place, which a Clamping chain for the lower film moves with respect to a working cycle of the packaging machine in the production direction.
- the triggering of the measurement run of the additional drive unit can take place in a similar manner to that already described above for the drive unit according to the invention.
- the drive unit according to the invention and the further drive unit can be controlled in such a way that they are coordinated with one another in such a way that they can compensate for a temperature influence that is present on them during the production run in order to jointly achieve a constant and reproducible film tension.
- the drive unit rotates a film take-up and the further drive unit rotates a residual film winder.
- such a setting function could also be available directly on the film holder and/or on the residual film winder.
- the invention also relates to a method for controlling at least one drive unit of a film transport device which feeds a film with a predetermined film tension to a workstation of the packaging machine during a production run taking place there.
- the film transport device is configured to feed an upper film with a predetermined film tension to a sealing station of the packaging machine during a production run taking place on the packaging machine.
- the film transport device can be used to feed a lower film with a predetermined film tension to a forming station of the packaging machine.
- the drive unit is controlled during a production run of the packaging machine on the basis of a speed-dependent and/or temperature-dependent friction torque characteristic curve recorded using a rotary-driven measuring run carried out by the drive unit. Irrespective of whether the film transport device is used to transport an upper film or a lower film, it is easier to maintain a constant and reproducible film tension in the film material during the production run. This is due to the fact that when the drive unit is controlled, taking into account the friction torque characteristic curve recorded on the basis of the measuring run, the drive unit's own dynamics can largely be compensated for.
- the drive unit prefferably to be accelerated incrementally at a continuously increasing speed during a measuring section of the measuring run, which is carried out after the running-in interval, in order to determine the friction torque characteristic. This results in a stepwise increasing speed characteristic.
- the power supply to the drive unit can be measured, which is directly proportional to the power torque applied to it.
- the measuring run can be controlled in such a way that the speed jumps become continuously larger.
- the inherent friction of the drive unit can be recorded more accurately overall. Above all, this can lead to a measurement time window for the measurement run in which there is no temperature change in the drive unit during the measurement run.
- the control device preferably determines a temperature compensation factor with regard to an operating temperature of the drive unit currently recorded during the production run and with regard to a measurement run temperature recorded during the measurement run for the actuation of the drive unit on the basis of a friction torque-temperature characteristic curve held available to it for the drive unit.
- the control device can use the temperature compensation factor to compensate for the temperature-dependent inherent friction of the drive unit during the production run.
- a temperature compensation factor dynamically adapted to the current operating temperature of the drive unit can be continuously determined by the control device during the production run and continuously used when controlling the drive unit to compensate for the temperature-dependent inherent friction. With this temperature compensation, a constant and reproducible film tension can be achieved during the production run.
- control device derives a power supply of the drive unit from the detected friction torque characteristic during the production run to achieve a desired film tension and dynamically adapts this assumed power supply using the temperature compensation factor determined with regard to the current operating temperature.
- the friction torque characteristic which can be determined by means of the measuring run for the drive unit, thus provides a characteristic curve for the drive unit's own friction, from which a dynamically adapted, actually required power supply for the drive unit can be derived using the temperature compensation factor in order to supply the film material with a supply the desired, constant and reproducible film tension to the packaging process.
- a quotient can be derived from the friction torque-temperature characteristic curve held by the control device, which indicates the temperature compensation factor for the current operating temperature.
- the inherent friction characteristic of the drive unit including a servo motor formed thereon, a gear mechanism formed thereon and/or bearing points formed thereon, i.e. its general speed and/or temperature-related inherent dynamics, by carrying out the measuring run and of the friction torque characteristic recorded in this way.
- a friction torque derived from this for a desired film tension or a power supply of the drive unit used for this purpose to achieve the desired film tension can also be adjusted by means of the temperature compensation factor with regard to a special, i.e. currently measured, operating temperature of the drive unit in order to counteract the influence of a changing operating temperature to compensate for the friction behavior of the drive unit during the production run, so that the film tension is highly consistent and reproducible during the production run.
- FIG 1 shows a packaging machine 1, which is designed as an intermittently operating thermoforming packaging machine 2, in a schematic side view.
- This thermoforming packaging machine 2 has a forming station 3, a sealing station 4, a transverse cutting device 5 and a longitudinal cutting device 6, which are arranged in this order in a transport direction R on a machine frame 7.
- a feed roller 8 On the input side there is a feed roller 8 on the machine frame 7, from which a lower film 9 is drawn off.
- the thermoforming packaging machine 2 has a transport chain 11, which grips the lower film 9 and transports it further in the transport direction R per main work cycle, in particular transport chains or clamp chains 11 arranged on both sides.
- the forming station 3 is designed as a deep-drawing station, in which depressions M are formed in the lower film 9 by deep-drawing, for example by means of compressed air and/or vacuum.
- the forming station 3 can be designed in such a way that in the direction perpendicular to the transport direction R, a plurality of troughs M are formed next to one another.
- a filling section 10 is provided in the transport direction R behind the forming station 3, in which the depressions M formed in the lower film 9 are filled with products.
- the sealing station 4 has a hermetically sealable chamber 4a, in which the atmosphere in the troughs M, prior to sealing with that of a top film transport device 12 discharged upper film 30 can be evacuated, for example, and/or replaced by gas flushing with a replacement gas or with a gas mixture.
- the cross-cutting device 5 can be designed as a punch, which cuts through the lower film 9 and the upper film 30 in a direction transverse to the transport direction R between adjacent troughs M.
- the cross-cutting device 5 works in such a way that the lower film 9 is not severed over the entire width, but rather is not severed at least in an edge region. This enables controlled further transport through the transport chain 11.
- the longitudinal cutting device 6 can be designed as a knife arrangement with which the lower film 9 and the upper film 30 are severed between adjacent troughs M and at the lateral edge of the lower film 9 in the transport direction R, so that individual packages V are present behind the longitudinal cutting device 6.
- thermoforming packaging machine 2 also has a control device 13. It has the task of controlling and monitoring the processes taking place in the thermoforming packaging machine 2.
- a display device 14 with operating elements 15 serves to visualize or influence the process sequences in the thermoforming packaging machine 2 for or by an operator.
- FIG 2 shows a tray sealing machine 16. This is also called a traysealer in specialist circles.
- Packaging trays S are provided on a feed belt 17 at the tray sealing machine 16 .
- the tray sealing machine 16 has a gripper device 18, by means of which the packaging trays S provided on the feed belt 17 are picked up and transferred to a sealing tool lower part 19 of the sealing station 20 for a tray sealing process.
- the lower part 19 of the sealing tool is raised against an upper part 21 of the sealing tool positioned above it in order to seal the packaging trays S with an upper film 22 guided through the sealing station 20 .
- a gassing process can be carried out via the upper part 21 of the sealing tool and/or the lower part 19 of the sealing tool before the tray sealing process in order to create a desired atmosphere within the packaging trays S positioned in the sealing station 20 .
- the sealing station 20 is opened by lowering the lower part 19 of the sealing tool.
- the packages sealed with a desired atmosphere can now be picked up by means of the gripper device 18 and transferred to a discharge belt 23 .
- the tray sealing machine 16 off figure 2 has a control device 24. It has the task of controlling and monitoring the processes running in the tray sealing machine 16.
- Packaging machines 1 shown i.e. on the thermoforming packaging machine 2 and on the tray sealing machine 16, it is advantageous to feed the respective films to the respective work stations with a certain constant film tension that can be reproduced per machine work cycle.
- a lower film transport device 26 is used as the film transport device 25a at the inlet of the thermoforming packaging machine 1.
- the lower foil transport device 26 has a drive unit 27 .
- the controller 13 is configured to control an operation of the drive unit 27 .
- the lower film 9 can be fed to the forming station 3 with a desired film tension for the forming process taking place therein by means of the drive unit 27 and by controlling a further drive unit (not shown) of the transport chains 11 .
- FIG. 1 Furthermore shows figure 1 as the film transport device 25b, the upper film transport device 12, which has a drive unit 28 in order to feed the upper film 30 to the sealing station 4 with a desired film tension.
- the upper film transport device 12 can be controlled by the control device 13 in such a way that the upper film 30 is fed to the sealing station 4 with the desired film tension.
- the drive unit 28 of the upper film transport device 12 can be controlled in a coordinated manner with the transport chains 11 in order to achieve the desired film tension in the upper film 30 .
- the film transport device 25c is another upper film transport device 29, which is configured to feed the upper film 22 to the sealing station 20 with a desired film tension.
- the upper film transport device 29 shown has a drive unit 31 which can be controlled by the control device 24 .
- the tray sealing machine 16 also has a residual film winder 42 which winds up the top film 22 left over after the sealing process.
- the drive unit 31 and a drive unit 32 of the residual film winder 42 can be controlled by the control device 24 for controlled film transport with a desired film tension.
- FIG 3 shows a speed diagram that uses one of the in the figures 1 and 2 shown or not shown drive units 27, 28, 31, 32 is carried out.
- the speed diagram figure 3 shows a running-in interval 33.
- the drive unit 27, 28, 31, 32 moved in both directions to eliminate a sticking effect.
- a measurement run 34 then takes place.
- the drive unit 27, 28, 31, 32 is gradually accelerated over its entire speed range.
- the inherent friction of the drive unit 27, 28, 31, 32 for the respective speed levels can be determined on the basis of the measurement run 34 carried out in this way.
- the measurement run 34 thus represents a friction determination run for the respective drive units 27, 28, 31, 32.
- figure 3 shows that gradually increasing speed steps are carried out during the measuring run 34 .
- the resulting frictional torque of the drive units 27, 28, 31, 32 can be recorded along the constant speed plateaus 40 that arise as a result.
- the respective friction torque is directly proportional to a power supply used for the respective speed plateaus 40, the course of which is shown in figure 3 is shown below the speed curve.
- figure 4 shows a friction torque-temperature characteristic curve 36, which can be maintained as an example for one of the drive units 27, 28, 31, 32 or for one of the drive units of the control device 13, 24 mentioned above but not shown.
- a temperature compensation factor 37 for the corresponding drive unit 27, 28, 31, 32 can be determined from the friction torque-temperature characteristic curve 36 shown.
- the temperature compensation factor 37 forms a quotient of a torque that is generated for a currently measured operating temperature of the drive unit 27, 28, 31, 32 using the friction torque-temperature characteristic 36 is reproduced and from a friction torque, which is present in the friction torque-temperature characteristic 36 at the temperature at which the measuring run 34 from figure 3 was carried out.
- figure 4 is an example of the friction torque from the friction torque-temperature characteristic 36 determined for an operating temperature of 15 °, which according to figure 4 is approximately 9 Nm. Furthermore, it is assumed that the measurement run 34 from figure 3 was carried out at a measurement run temperature of 5°C.
- the friction torque-temperature characteristic 36 from figure 4 specifies a friction torque of 9 Nm for 5°C, so that the quotient of the respective friction torques is 2/3.
- FIG 4 shows figure 4 the friction torque characteristic curve 38, shown only schematically, which is determined on the basis of the measuring run 34, ie as a function of the figure 3 shown power supply of the drive unit 27, 28, 31, 32 required for this takes place.
- a power supply 38' compensated for the operating temperature 15, which is measured during the production run can be determined for the drive unit 27, 28, 31, 32 by means of the control device 13, 24 using the temperature compensation factor 37, on the basis of which the drive unit 27, 28, 31, 32 can be operated in order to keep the film tension constant at an operating temperature of 15°.
- the assumed power supply which results from the measuring run 34 for the speed to achieve the film tension, is corrected by the temperature compensation factor 37 .
- the Figures 3 and 4 show that a power supply that can be derived from the measuring run 34 to achieve a specific, desired film tension with regard to a changing operating temperature of the drive unit 27, 28, 31, 32 during the production run, caused by the ongoing operation of the drive unit 27, 28, 31, 32 by means of the calculable temperature compensation factor 37 can be adjusted in order to calculate the power supply of the drive unit 27, 28, 31, 32 actually required for the detected operating temperature, which is necessary to achieve a constant and reproducible film tension.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
Abstract
Verpackungsmaschine (1), umfassend eine Folientransporteinrichtung (25a, 25b, 25c) und eine Steuereinrichtung (13, 24) zum Steuern eines Betriebs mindestens einer Antriebseinheit (27, 28, 31, 32) der Folientransporteinrichtung (25a, 25b, 25c), wobei die Steuereinrichtung (13, 24) dazu ausgebildet ist, die Antriebseinheit (27, 28, 31, 32) bei einem Produktionslauf der Verpackungsmaschine (1) auf Basis einer anhand eines mittels der Antriebseinheit (27, 28, 31, 32) durchgeführten, drehangetriebenen Messlaufs erfassten, drehzahl- und/oder temperaturabhängigen Reibmoment-Kennlinie (38) anzusteuern. Die Erfindung betrifft ferner ein Verfahren zum Steuern einer Antriebseinheit (27, 28, 31, 32) einer Folientransporteinrichtung (25a, 25b, 25c).Packaging machine (1), comprising a film transport device (25a, 25b, 25c) and a control device (13, 24) for controlling an operation of at least one drive unit (27, 28, 31, 32) of the film transport device (25a, 25b, 25c), wherein the control device (13, 24) is designed to control the drive unit (27, 28, 31, 32) during a production run of the packaging machine (1) on the basis of a rotary drive carried out by means of the drive unit (27, 28, 31, 32). Measuring run detected, speed and / or temperature-dependent friction torque characteristic (38) to control. The invention also relates to a method for controlling a drive unit (27, 28, 31, 32) of a film transport device (25a, 25b, 25c).
Description
Die vorliegende Erfindung betrifft eine Verpackungsmaschine gemäß dem Anspruch 1. Weiter bezieht sich die Erfindung auf ein Verfahren gemäß dem Anspruch 8.The present invention relates to a packaging machine according to
Außer einer hohen Prozesssicherheit und Leistungsfähigkeit einer Verpackungsmaschine ist die Reduzierung von Verpackungsmaterial eine wesentliche Kundenanforderung, mit welcher Verpackungsmaschinenhersteller immer stärker konfrontiert werden. Das bedeutet, dass zunehmend dünnere Folien eingesetzt werden sollen und der Folienabfall beim Verpackungsprozess, insbesondere ein dabei nicht zu Verpackungen verarbeiteter Folienrandstreifen, minimiert werden muss.In addition to high process reliability and the performance of a packaging machine, the reduction of packaging material is an essential customer requirement that packaging machine manufacturers are increasingly confronted with. This means that increasingly thin films are to be used and the film waste during the packaging process, in particular a film edge strip that is not processed into packaging, must be minimized.
In der Praxis werden an Verpackungsmaschinen, beispielsweise an intermittierend arbeitenden Tiefziehverpackungsmaschinen oder an Schalenverschließmaschinen, bereits Servoantriebe zur Ansteuerung von Folienaufnahmen und Folienrestwicklern eingesetzt. Mittels solcher Servoantriebe ist es möglich, die Folienspannung über eine Drehmomentvorgabe zu steuern. Damit erhält der Kunde die Möglichkeit, die Folienspannung individuell einzustellen, wodurch dünne Folien besser transportierbar und lediglich sehr schmale Folienrandstreifen bei der Herstellung von Verpackungen übrigbleiben.In practice, servo drives are already used on packaging machines, for example on intermittently operating deep-drawing packaging machines or on tray sealing machines, to control film pickups and residual film winders. By means of such servo drives it is possible to control the film tension by specifying a torque. This gives the customer the opportunity to adjust the film tension individually, which means that thin films can be transported more easily and only very narrow film edge strips remain in the production of packaging.
Allerdings hat es sich gezeigt, dass die herkömmliche Drehmomentvorgabesteuerung durch während eines Verpackungsprozesses auftretende Störgrößen, beispielsweise aufgrund einer sich ändernden Betriebstemperatur und/oder aufgrund variierender Servomotordrehzahlen, derart beeinflusst werden kann, dass keine gleichbleibende und reproduzierbare Folienspannung während des Verpackungsprozesses erreicht wird.However, it has been shown that the conventional torque setting control can be influenced by disturbances occurring during a packaging process, for example due to a changing operating temperature and/or due to varying servomotor speeds, in such a way that no consistent and reproducible film tension is achieved during the packaging process.
Vor allem kann eine betriebsbedingte Eigendynamik eines jeden für die Folientransporteinrichtung eingesetzten Antriebs problematisch sein, da diese eine sich während des Produktionslaufs bzw. Verpackungsprozesses der Verpackungsmaschine schwankende Folienspannung hervorrufen kann. Eine sich während des Produktionslaufs ändernde Folienspannung führt jedoch gerade bei dünnen Folien zu Ermüdungserscheinungen und kann weiter dazu führen, dass das Folienmaterial während des Produktionslaufs sichtbar beschädigt wird, beispielsweise an ermüdeten Stellen einreißt. Die damit einhergehende Unterbrechung des Produktionslaufs, um ggf. das Folienmaterial neu einzuspannen, mindert die Produktivität der Verpackungsmaschine.Above all, operational inherent dynamics of each drive used for the film transport device can be problematic, since this can cause film tension to fluctuate during the production run or packaging process of the packaging machine. A film tension that changes during the production run, however, leads to signs of fatigue, especially in the case of thin films, and can also lead to the film material being visibly damaged during the production run, for example tearing at fatigued points. The associated interruption of the production run, in order to re-clamp the film material if necessary, reduces the productivity of the packaging machine.
Aufgabe der Erfindung ist es, eine Verpackungsmaschine sowie ein Verfahren zur Verfügung zu stellen, womit die Verarbeitung von dünnem Folienmaterial besser möglich ist.The object of the invention is to provide a packaging machine and a method with which the processing of thin film material is better possible.
Diese Aufgabe wird gelöst mittels einer Verpackungsmaschine nach Anspruch 1 sowie anhand eines Verfahrens nach Anspruch 8. Vorteilhafte Weiterbildungen der Erfindung sind durch die jeweiligen Gegenstände der Unteransprüche gegeben.This object is achieved by means of a packaging machine according to
Die Erfindung bezieht sich auf eine Verpackungsmaschine, die eine Folientransporteinrichtung und eine Steuereinrichtung zum Steuern eines Betriebs mindestens einer Antriebseinheit der Folientransporteinrichtung aufweist. Die erfindungsgemäße Verpackungsmaschine liegt insbesondere in Form einer Tiefziehverpackungsmaschine oder in Form einer Schalenverschließmaschine vor, die in Fachkreisen auch "Traysealer" genannt wird.The invention relates to a packaging machine that has a film transport device and a control device for controlling an operation of at least one drive unit of the film transport device. The packaging machine according to the invention is in particular in the form of a thermoforming packaging machine or in the form of a tray sealing machine, which is also called a "tray sealer" in technical circles.
Erfindungsgemäß ist die Steuereinrichtung dazu ausgebildet, die Antriebseinheit bei einem Produktionslauf der Verpackungsmaschine auf Basis einer anhand eines mittels der Antriebseinheit durchgeführten, drehangetriebenen Messlaufs erfassten, drehzahl- und/oder temperaturabhängigen Reibmoment-Kennlinie anzusteuern.According to the invention, the control device is designed to control the drive unit during a production run of the packaging machine on the basis of a speed-dependent and/or temperature-dependent friction torque characteristic recorded using a rotary-driven measuring run performed by the drive unit.
Der mittels der Antriebseinheit durchgeführte Messlauf findet separat zum Produktionslauf, d.h. gesondert zum Verpackungsprozess der Verpackungsmaschine, statt. Der Messlauf dient bei der Erfindung zum Ermitteln einer an der Antriebseinheit messbaren, sich betriebsbedingt variierenden Eigenreibung. Der Messlauf findet somit als Reibermittlungslauf als Grundlage für den eigentlichen, mittels der Verpackungsmaschine durchzuführenden Produktionslauf statt.The measuring run carried out by the drive unit takes place separately from the production run, i.e. separately from the packaging process of the packaging machine. In the case of the invention, the measurement run is used to determine an operationally varying inherent friction that can be measured on the drive unit. The measuring run thus takes place as a friction determination run as the basis for the actual production run to be carried out using the packaging machine.
Der charakteristische Verlauf der an der Antriebseinheit messbaren Eigenreibung kann beispielsweise proportional aus einer für den Messlauf benötigten, an der Antriebseinheit erfassten Stromzufuhr abgeleitet werden. Die dadurch erhaltene Reibmoment-Kennlinie wird dann beim eigentlichen Produktionslauf bei der Ansteuerung der Antriebseinheit berücksichtigt, um eine gewünschte Folienspannung trotz des variierenden Eigenreibungsmoments der Antriebseinheit gleichbleibend, d.h. ohne Spannungsschwankungen, aufrecht zu erhalten. In anderen Worten lässt sich dank der Erfindung die durch den Messlauf erfasste Eigenreibung der Antriebseinheit während des Produktionslaufs derart kompensieren, dass dadurch eine gleichbleibende Folienspannung während des Produktionslaufs zustande kommt.The characteristic course of the inherent friction that can be measured at the drive unit can be derived, for example, proportionally from a power supply that is required for the measurement run and is detected at the drive unit. The friction torque characteristic obtained in this way is then taken into account during the actual production run when controlling the drive unit in order to maintain the desired film tension consistently, i.e. without tension fluctuations, despite the varying inherent friction torque of the drive unit. In other words, thanks to the invention, the inherent friction of the drive unit detected by the measuring run can be compensated during the production run in such a way that a constant film tension is achieved during the production run.
Anhand der für die Antriebseinheit, mittels des daran durchgeführten Messlaufs erfassten charakteristischen Reibmoment-Kennlinie, die sich beispielsweise direkt proportional zu einer während des Messlaufs erfassten, drehzahlabhängigen Bestromung der Antriebseinheit ermitteln lässt, ist es möglich, die Eigenreibung der Antriebseinheit zu erfassen und diese als Grundlage bei der Ansteuerung der Antriebseinheit während des gesondert, insbesondere unmittelbar im Anschluss oder erst später ablaufenden Produktionslaufs zum Erreichen einer konstanten Folienspannung zu berücksichtigen. Der für den Produktionslauf durchgeführte Messlauf dient somit zum Erfassen der Reibungsdynamik der Antriebseinheit, unter deren Berücksichtigung die Ansteuerung beim Produktionslauf geschieht, um zu verhindern, dass das Folienmaterial einer schwankenden Beanspruchung unterliegt. Dadurch können sehr dünne Folien zuverlässig zu einwandfreien Verpackungen verarbeitet werden.Using the characteristic friction torque curve recorded for the drive unit by means of the measurement run carried out on it, which can be determined, for example, directly proportional to a speed-dependent energization of the drive unit recorded during the measurement run, it is possible to record the drive unit's own friction and use this as a basis in the control of the drive unit during the production run that runs separately, in particular immediately afterwards or only later, in order to achieve a constant film tension to consider. The measurement run carried out for the production run thus serves to record the friction dynamics of the drive unit, taking into account the control during the production run, in order to prevent the film material from being subjected to fluctuating stress. As a result, very thin films can be reliably processed into perfect packaging.
Anhand der mittels des Messlaufs ermittelten Reibmoment-Kennlinie kann wenigstens der mechanische Einfluss der Eigenreibung der Antriebseinheit bei verschiedenen für den Produktionslauf einsetzbaren Drehzahlen erfasst und bei einer dementsprechenden Ansteuerung der Antriebseinheit kompensiert werden. Es ist daher möglich, eine Stromzufuhr an der Antriebseinheit so zu tätigen, dass eine zum Erreichen einer gewünschten Folienspannung angenommene Stromzufuhr hinsichtlich des mittels des Messlaufs erfassten Eigenreibmoments der Antriebseinheit bei einer dafür anzunehmenden Drehzahl korrigiert wird.Using the friction torque characteristic curve determined by means of the measuring run, at least the mechanical influence of the inherent friction of the drive unit can be recorded at various speeds that can be used for the production run and compensated for with a corresponding control of the drive unit. It is therefore possible to supply power to the drive unit in such a way that a power supply assumed to achieve a desired film tension is corrected with regard to the inherent friction torque of the drive unit detected by means of the measuring run at a speed to be assumed for this.
Insbesondere ist der Messlauf als geschwindigkeitsabhängiger, sprich drehzahlabhängiger, Reibermittlungslauf durchführbar, um die Eigenreibung der Antriebseinheit zu bestimmen. Zweckmäßig ist es, den Messlauf ohne Folienmaterial durchzuführen. Gemäß einer Variante kann der Messlauf betriebsstundenabhängig, beispielsweise in bestimmten Intervallen durchgeführt werden, um eine aktuelle Eigenreibung der Antriebseinheit zu berücksichtigen. Vorstellbar ist es, dass eine Messlauffunktion zum Durchführen des Messlaufs von einem Bediener an der Verpackungsmaschine, beispielsweise an einem daran vorgesehenen Bedienterminal, aufrufbar ist.In particular, the measuring run can be carried out as a speed-dependent, ie speed-dependent, friction determination run in order to determine the internal friction of the drive unit. It is advisable to carry out the measuring run without foil material. According to one variant, the measuring run can be carried out as a function of the operating hours, for example at certain intervals, in order to take account of the current internal friction of the drive unit. It is conceivable that a measurement run function for carrying out the measurement run can be called up by an operator on the packaging machine, for example on an operating terminal provided there.
Bei der Folientransporteinrichtung kann es sich um eine Oberfolientransporteinrichtung zum Transport einer Oberfolie und/oder um eine Unterfolientransporteinrichtung zum Transport einer Unterfolie handeln, anhand derer die Oberfolie und/oder Unterfolie während des Produktionslaufs der Verpackungsmaschine einem daran stattfindenden Arbeitsprozess unter einer gewünschten Folienspannung zuführbar ist. Insbesondere ist die Oberfolientransporteinrichtung dazu ausgebildet, die Oberfolie einer Siegelstation einer Tiefziehverpackungs- oder Schalenverschließmaschine zuzuführen. Die Unterfolientransporteinrichtung kann an einer Tiefziehverpackungsmaschine zum Einsatz kommen, um die Unterfolie einer Formstation der Tiefziehverpackungsmaschine zuführen.The film transport device can be an upper film transport device for transporting an upper film and/or a lower film transport device for transporting a lower film, by means of which the upper film and/or lower film can be fed to a working process taking place on the packaging machine under a desired film tension during the production run of the packaging machine. In particular, the upper film transport device is designed to feed the upper film to a sealing station of a thermoforming packaging or tray sealing machine. The lower film transport device can be used on a thermoforming packaging machine in order to feed the lower film to a forming station of the thermoforming packaging machine.
Vorzugsweise weist die Antriebseinheit einen Servoantrieb auf. Dieser kann einen Servomotor und einen Servoregler umfassen, der auf Basis der Reibmoment-Kennlinie dynamisch den Betrieb der Antriebseinheit steuert, um während des Produktionslaufs eine gleichbleibende Folienspannung zu erreichen. Die Reibmoment-Kennlinie, insbesondere die der Reibmoment-Kennlinie zugrundeliegende Leistungsversorgung der Antriebseinheit, kann zur Kompensation der Eigenreibung der Antriebseinheit als störgrößenabhängige Kennlinienvorsteuerung und/oder als Störgrößenaufschaltung dem Servoantrieb, insbesondere dem Servoregler, zugeschalten sein.The drive unit preferably has a servo drive. This can include a servo motor and a servo controller, which dynamically controls the operation of the drive unit on the basis of the friction torque characteristic in order to achieve a constant film tension during the production run. The friction torque characteristic, in particular that on which the friction torque characteristic is based Power supply of the drive unit can be connected to the servo drive, in particular the servo controller, to compensate for the inherent friction of the drive unit as a disturbance variable-dependent characteristic curve pre-control and/or as disturbance variable injection.
Insbesondere weist die Antriebseinheit ein Getriebe, insbesondere ein Getriebe mit mehreren Getriebestufen, auf. Das Getriebe wie auch der Servomotor weisen eine individuelle Eigenreibung auf, die Einfluss auf die Folienspannung haben können. Die jeweiligen Reibmomente können jedoch anhand des Messlaufs kumulativ für die Antriebseinheit bestimmt werden und somit mittels der daraus resultierenden Reibmoment-Kennlinie systematisch bei der Ansteuerung der Antriebseinheit berücksichtigt werden.In particular, the drive unit has a gear, in particular a gear with a plurality of gear stages. The gearbox as well as the servo motor have their own individual friction, which can influence the film tension. However, the respective friction torques can be determined cumulatively for the drive unit using the measurement run and can thus be systematically taken into account when controlling the drive unit using the resulting friction torque characteristic curve.
Vorstellbar ist es, dass die Antriebseinheit zum Erfassen der Reibmoment-Kennlinie über einen gesamten Drehzahlbereich der Antriebseinheit ansteuerbar ist. Dafür könnte die Antriebseinheit beim Messlauf sukzessive aus dem Stillstand heraus bis zum Erreichen der maximalen Drehzahl beschleunigt werden. Damit lässt sich die Eigenreibung der Antriebseinheit, beispielsweise an verschiedenen Drehzahlstufen, über den gesamten Drehzahlbereich erfassen und als Basis zur Ansteuerung der Antriebseinheit während des Produktionslaufs einsetzen. Das Ergebnis des Reibermittlungslaufs könnte mittels einer elektronischen Speichereinheit der Steuereinrichtung gesichert werden, um zukünftig für Verpackungsprozesse der Verpackungsmaschine eingesetzt zu werden.It is conceivable that the drive unit can be controlled over an entire speed range of the drive unit in order to record the friction torque characteristic. To do this, the drive unit could be gradually accelerated from standstill during the measurement run until it reaches the maximum speed. This allows the drive unit's own friction, for example at different speed levels, to be recorded over the entire speed range and used as a basis for controlling the drive unit during the production run. The result of the friction determination run could be saved by means of an electronic memory unit of the control device in order to be used for packaging processes of the packaging machine in the future.
Vorzugsweise ist die Antriebseinheit zum Erfassen der Reibmoment-Kennlinie anhand schrittweise, kontinuierlich ansteigenden Drehzahlniveaus, d.h. mittels zunehmend schneller werdenden Geschwindigkeitsstufen, während des Messlaufs beschleunigbar. Das Reibmoment kann zuverlässig anhand der ansteigenden Geschwindigkeitsstufen erfasst werden, insbesondere dann, wenn für die jeweiligen Geschwindigkeitsstufen eine im Wesentlichen gleichbleibende Bestromung messbar ist. Bildlich wird dies anhand eines Plateaus in der Leistungskurve dargestellt.Preferably, the drive unit can be accelerated during the measuring run in order to record the friction torque characteristic by means of stepwise, continuously increasing speed levels, i.e. by means of increasingly faster speed levels. The frictional torque can be reliably detected based on the increasing speed levels, in particular when an essentially constant current flow can be measured for the respective speed levels. This is illustrated by a plateau in the power curve.
Es wäre vorstellbar, dass die Steuereinrichtung eine Filterfunktion aufweist, um jeweils zu Beginn einer während des Messlaufs eingestellten Geschwindigkeitsstufe kurzzeitig, aufgrund der Drehzahlerhöhung auftretende Leistungspeaks herauszufiltern. Aus der während des Messlaufs erfassten Leistungsversorgung der Antriebseinheit ergibt sich insbesondere in direkt proportionalem Zusammenhang die charakteristische Reibmoment-Kennlinie der Antriebseinheit. Vorstellbar ist es, dass die Steuereinrichtung dazu konfiguriert ist, aus einer Vielzahl der während des Messlaufs erfassten Reibmomente eine interpolierte Reibmoment-Kennlinie herzustellen.It would be conceivable for the control device to have a filter function in order to briefly filter out power peaks occurring at the beginning of a speed level set during the measurement run due to the increase in speed. The characteristic friction torque curve of the drive unit results from the power supply of the drive unit recorded during the measurement run, in particular in a directly proportional relationship. It is conceivable that the control device is configured to produce an interpolated friction torque characteristic curve from a large number of the friction torques recorded during the measuring run.
Gemäß einer Variante ist die Steuereinrichtung zum Bestimmen einer Messlauftemperatur der während des Messlaufs drehangetriebenen Antriebseinheit ausgebildet. Dafür kann die Antriebseinheit, insbesondere ein daran ausgebildeter Servomotor, mindestens einen Temperatursensor aufweisen, anhand dessen sich die Messlauftemperatur während des Reibermittlungslaufs erfassen lässt. Vorzugsweise kann der Temperatursensor darüber hinaus während des Produktionslaufs zum Messen einer aktuellen Betriebstemperatur der Antriebseinheit eingesetzt werden.According to one variant, the control device is designed to determine a measurement run temperature of the drive unit that is driven in rotation during the measurement run. For this purpose, the drive unit, in particular a servomotor configured thereon, can have at least one temperature sensor, by means of which the measuring run temperature can be recorded during the friction determination run. In addition, the temperature sensor can preferably be used during the production run to measure a current operating temperature of the drive unit.
Eine zweckmäßige Variante sieht vor, dass der Messlauf derart durchgeführt wird, dass die Aufzeichnung der Reibmoment-Kennlinie während einer konstanten Messlauftemperatur stattfindet. Für die Genauigkeit der Ansteuerung der Antriebseinheit während des Produktionslaufs hat sich herausgestellt, dass eine Messlauftemperatur im Bereich von 3°C bis 8°C, insbesondere von 5°C bis 6°C, zum Ermitteln der damit zusammenhängenden Reibmoment-Kennlinie geeignet ist. Vor allem kann die Steuereinrichtung ein Zeitfenster des Messlaufs so wählen, dass der Messlauf mit einer gleichbleibenden Messlauftemperatur durchführbar ist. Es hat sich als praxistauglich erwiesen, dass der Messlauf bei einer konstanten Messlauftemperatur von 5°C durchgeführt wird.An expedient variant provides that the measurement run is carried out in such a way that the friction torque characteristic curve is recorded during a constant measurement run temperature. For the accuracy of the control of the drive unit during the production run, it has been found that a measuring run temperature in the range from 3°C to 8°C, in particular from 5°C to 6°C, is suitable for determining the associated friction torque characteristic. Above all, the control device can select a time window for the measurement run in such a way that the measurement run can be carried out with a constant measurement run temperature. It has proven to be practical that the measuring run is carried out at a constant measuring run temperature of 5°C.
Eine bevorzugte Variante sieht vor, dass die Steuereinrichtung dazu konfiguriert ist, auf Basis mindestens einer der Steuereinrichtung für die Antriebseinheit vorgehaltenen Reibmoment-Temperatur-Kennlinie einen daraus hinsichtlich einer aktuell erfassten Betriebstemperatur der Antriebseinheit und hinsichtlich der während des Messlaufs erfassten Messlauftemperatur abgeleiteten Temperaturkompensationsfaktor für die Ansteuerung der Antriebseinheit zu bestimmen.A preferred variant provides that the control device is configured to, on the basis of at least one frictional torque-temperature characteristic curve held available to the control device for the drive unit, derive a temperature compensation factor for the control with regard to a currently recorded operating temperature of the drive unit and with regard to the measurement run temperature recorded during the measurement run of the drive unit.
Insbesondere ist die Steuereinrichtung dazu ausgebildet, die mittels des Messlaufs ermittelte, geschwindigkeitsabhängige Reibmoment-Kennlinie, insbesondere eine daraus zum Erreichen einer gewünschten Folienspannung ableitbare benötigte Leistungsversorgung der Antriebseinheit, unter Anwendung des hinsichtlich der aktuell an der Antriebseinheit anliegenden Betriebstemperatur bestimmten Temperaturkompensationsfaktors zu korrigieren. Damit kann die tendenziell während des Produktionslaufs mit zunehmender Betriebstemperatur geringer werdende Eigenreibung bei der Ansteuerung der Antriebseinheit berücksichtigt werden. Mit dieser Temperaturkompensation lässt sich während des Produktionslaufs noch besser die gewünschte Folienspannung aufrechterhalten.In particular, the control device is designed to correct the speed-dependent friction torque characteristic curve determined by means of the measuring run, in particular a power supply required for the drive unit that can be derived from this to achieve a desired film tension, using the temperature compensation factor determined with regard to the operating temperature currently present at the drive unit. This means that the inherent friction, which tends to decrease during the production run as the operating temperature increases, can be taken into account when controlling the drive unit. With this temperature compensation, the desired film tension can be maintained even better during the production run.
Die Reibmoment-Temperatur-Kennlinie braucht lediglich einmalig für die Antriebseinheit, d.h. für deren modularen Aufbau, bestimmt zu werden. Es wäre vorstellbar, dass die Reibmoment-Temperatur-Kennlinie hinsichtlich der jeweiligen Funktionseinheiten der Antriebseinheit bestimmt wird.The friction torque-temperature characteristic only needs to be determined once for the drive unit, ie for its modular structure. It would be conceivable for the friction torque-temperature characteristic to be determined with regard to the respective functional units of the drive unit.
Tests haben gezeigt, dass Abweichungen des Reibmoment-Temperatur-Verhaltens innerhalb einer für die Antriebseinheit eingesetzten Getriebebaureihe sehr gering sind und demzufolge vernachlässigbar sind.Tests have shown that deviations in the frictional torque-temperature behavior within a transmission series used for the drive unit are very small and can therefore be ignored.
Vor allem kann der Temperaturkompensationsfaktor als temperaturabhängiger Quotient aus der der Steuereinrichtung für die jeweilige Antriebseinheit vorgehaltenen Reibmoment-Temperatur-Kennlinie abgeleitet sein. Insbesondere wird der Quotient angesichts der Reibmoment-Temperatur-Kennlinie aus dem daraus für die aktuelle Betriebstemperatur angezeigten Reibmoment und dem daraus hinsichtlich der Messlauftemperatur angezeigten Reibmoment gebildet.Above all, the temperature compensation factor can be derived as a temperature-dependent quotient from the frictional torque-temperature characteristic kept available to the control device for the respective drive unit. In particular, the quotient is formed from the friction torque displayed for the current operating temperature and the friction torque displayed from this with regard to the measurement run temperature in view of the friction torque-temperature characteristic.
Während des Produktionslaufs lässt sich vorzugsweise mittels des für die aktuelle Betriebstemperatur und für die Messlauftemperatur der Antriebseinheit bestimmten Temperaturkompensationsfaktors fortlaufend eine auf Basis der Reibmoment-Kennlinie angenommene in eine für die aktuelle Betriebstemperatur tatsächlich benötigte Leistungsversorgung ableiten, um während des Produktionslaufs trotz steigender Betriebstemperatur der Antriebseinheit eine gleichbleibende Folienspannung zu erreichen. Mit steigender Betriebstemperatur nimmt daher das tatsächlich zum Erreichen der gewünschten Folienspannung benötigte Leistungsdrehmoment proportional ab, wodurch Temperatureinflüsse auf das Reibverhalten der Antriebseinheit kompensiert werden können. Damit kann in vorteilhafter Weise eine gleichbleibende und reproduzierbare Folienspannung während des Produktionslaufs selbst bei einer variierenden Betriebstemperatur der Antriebseinheit erreicht werden, sodass der Einsatz von sehr dünnen Folien ermöglicht wird.During the production run, the temperature compensation factor determined for the current operating temperature and for the measurement run temperature of the drive unit can be used to continuously derive a power supply that is assumed based on the friction torque characteristic and actually required for the current operating temperature, in order to ensure a power supply during the production run despite the increasing operating temperature of the drive unit to achieve constant film tension. As the operating temperature rises, the power torque actually required to achieve the desired film tension decreases proportionally, which means that temperature influences on the friction behavior of the drive unit can be compensated for. In this way, a constant and reproducible film tension can advantageously be achieved during the production run, even with a varying operating temperature of the drive unit, so that the use of very thin films is made possible.
Wie bereits an weiter oberer Stelle angedeutet, kann die Verpackungsmaschine als Tiefziehverpackungsmaschine oder als Schalenverschließmaschine ausgebildet sein. In Form einer Tiefziehverpackungsmaschine könnte die Folientransporteinrichtung als Oberfolientransporteinrichtung vorliegen, um eine Oberfolie einer Siegelstation der Tiefziehverpackungsmaschine mit einer gewünschten Folienspannung zuzuführen. Eine derartige Oberfolientransporteinrichtung kann an der Schalenverschließmaschine vergleichbar ausgebildet sein.As already indicated above, the packaging machine can be designed as a thermoforming packaging machine or as a tray sealing machine. In the form of a thermoforming packaging machine, the film transport device could be in the form of an upper film transport device in order to feed an upper film to a sealing station of the thermoforming packaging machine with a desired film tension. Such an upper film transport device can be designed in a comparable manner on the tray sealing machine.
Vorzugsweise weist die Folientransporteinrichtung mindestens eine weitere Antriebseinheit auf, wobei die Steuereinrichtung dazu ausgebildet ist, die weitere Antriebseinheit bei einem Produktionslauf der Verpackungsmaschine auf Basis einer anhand eines mittels der weiteren Antriebseinheit durchgeführten, drehangetriebenen Messlaufs erfassten, drehzahl- und/oder temperaturabhängigen weiteren Reibmoment-Kennlinie anzusteuern. Die beiden Antriebseinheiten können damit derart auf Basis der daran vorliegenden Eigenreibung betrieben werden, dass sie gemeinsam die dazwischen eingespannte Folie mit gleichmäßiger und reproduzierbarer Folienspannung während des Produktionslaufs transportieren.The film transport device preferably has at least one additional drive unit, with the control device being designed to control the additional drive unit during a production run of the packaging machine on the basis of a speed- and/or temperature-dependent additional frictional torque characteristic recorded using a rotary-driven measuring run carried out by means of the additional drive unit head for. The two drive units can thus be operated on the basis of the inherent friction present on them in such a way that they jointly transport the film clamped between them with uniform and reproducible film tension during the production run.
Es wäre möglich, dass für sämtliche an der Folientransporteinrichtung für den Folientransport eingesetzten Antriebseinheiten ein jeweiliger Messlauf, beispielsweise zeitgleich und/oder bei einer Inbetriebnahme der Verpackungsmaschine, stattfindet, um für die jeweilige Antriebseinheit eine gesonderte Reibmoment-Kennlinie zu erfassen und in der Steuereinrichtung zu hinterlegen.It would be possible for a respective measurement run to take place for all drive units used on the film transport device for film transport, for example at the same time and/or when the packaging machine is started up, in order to record a separate friction torque characteristic for the respective drive unit and store it in the control device .
Die erfindungsgemäße Folientransporteinrichtung könnte an der Tiefziehverpackungsmaschine eine Unterfolientransporteinrichtung sein, um eine in Produktionsrichtung eingangs der Tiefziehverpackungsmaschine gelagerte Unterfolie mittels einer gewünschten Folienspannung einer stromabwärts positionierten Formstation zur Herstellung von Mulden zuzuführen. Hier kann die gewünschte Folienspannung dadurch erreicht werden, dass eine erfindungsgemäß auf Basis der Reibmoment-Kennlinie durchgeführte, dynamische Ansteuerung der Antriebseinheit einer eingangs der Tiefziehverpackungsmaschine gelagerten Folienrollenaufnahme sowie eine auf Basis der weiteren Reibmoment-Kennlinie durchgeführte, dynamische Ansteuerung der weiteren Antriebseinheit geschieht, welche eine Klammerkette für die Unterfolie hinsichtlich eines Arbeitstakts der Verpackungsmaschine in Produktionsrichtung bewegt.The film transport device according to the invention could be a lower film transport device on the thermoforming packaging machine in order to feed a lower film stored in the production direction at the entrance of the thermoforming packaging machine by means of a desired film tension to a forming station positioned downstream for the production of troughs. Here, the desired film tension can be achieved in that a dynamic control of the drive unit of a film roll holder mounted at the inlet of the thermoforming packaging machine based on the friction torque characteristic and a dynamic control of the further drive unit based on the further friction torque characteristic takes place, which a Clamping chain for the lower film moves with respect to a working cycle of the packaging machine in the production direction.
Die Ansteuerung des Messlaufs der weiteren Antriebseinheit kann in ähnlicher Weise ablaufen, wie dies vorangehend für die erfindungsgemäße Antriebseinheit bereits beschrieben wurde. Insbesondere können die erfindungsgemäße Antriebseinheit sowie die weitere Antriebseinheit derart aufeinander abgestimmt angesteuert werden, dass sie während des Produktionslaufs einen an ihnen jeweils vorliegenden Temperatureinfluss ausgleichen können, um gemeinsam eine konstante und reproduzierbare Folienspannung zu erreichen.The triggering of the measurement run of the additional drive unit can take place in a similar manner to that already described above for the drive unit according to the invention. In particular, the drive unit according to the invention and the further drive unit can be controlled in such a way that they are coordinated with one another in such a way that they can compensate for a temperature influence that is present on them during the production run in order to jointly achieve a constant and reproducible film tension.
Vorstellbar ist es, dass die Antriebseinheit eine Folienaufnahme und die weitere Antriebseinheit einen Folienrestwickler dreht. Insbesondere ist es möglich, eine gewünschte Folienspannung für verschiedene Folientypen an der Steuereinrichtung individuell einzustellen und trotz Temperaturänderungen während des Produktionslaufs eine gleichbleibende und reproduzierbare Folienspannung zu erreichen. Eine derartige Einstellfunktion könnte alternativ oder ergänzend auch direkt an der Folienaufnahme und/oder am Folienrestwickler zur Verfügung stehen.It is conceivable that the drive unit rotates a film take-up and the further drive unit rotates a residual film winder. In particular, it is possible to individually set a desired film tension for different film types on the control device and to achieve a constant and reproducible film tension despite temperature changes during the production run. As an alternative or in addition, such a setting function could also be available directly on the film holder and/or on the residual film winder.
Ferner betrifft die Erfindung ein Verfahren zum Steuern mindestens einer Antriebseinheit einer Folientransporteinrichtung, die an einer Verpackungsmaschine während eines daran stattfindenden Produktionslaufs eine Folie mit einer vorbestimmten Folienspannung einer Arbeitsstation der Verpackungsmaschine zuführt. Insbesondere ist die Folientransporteinrichtung dazu konfiguriert, während eines an der Verpackungsmaschine stattfindenden Produktionslaufs eine Oberfolie mit einer vorbestimmten Folienspannung einer Siegelstation der Verpackungsmaschine zuzuführen.The invention also relates to a method for controlling at least one drive unit of a film transport device which feeds a film with a predetermined film tension to a workstation of the packaging machine during a production run taking place there. In particular, the film transport device is configured to feed an upper film with a predetermined film tension to a sealing station of the packaging machine during a production run taking place on the packaging machine.
Die Folientransporteinrichtung kann alternativ dafür eingesetzt werden, um eine Unterfolie mit einer vorbestimmten Folienspannung einer Formstation der Verpackungsmaschine zuzuführen.Alternatively, the film transport device can be used to feed a lower film with a predetermined film tension to a forming station of the packaging machine.
Erfindungsgemäß wird die Antriebseinheit bei einem Produktionslauf der Verpackungsmaschine auf Basis einer anhand eines mittels der Antriebseinheit durchgeführten, drehangetriebenen Messlaufs erfassten, drehzahl- und/oder temperaturabhängigen Reibmoment-Kennlinie gesteuert. Unabhängig davon, ob die Folientransporteinrichtung für den Transport einer Oberfolie oder einer Unterfolie eingesetzt wird, kann damit im Folienmaterial besser eine konstante und reproduzierbare Folienspannung während des Produktionslaufs eingehalten werden. Dies ist darauf zurückzuführen, dass sich bei der Ansteuerung der Antriebseinheit unter Berücksichtigung der anhand des Messlaufs erfassten Reibmoment-Kennlinie größtenteils eine Eigendynamik der Antriebseinheit ausgleichen lässt.According to the invention, the drive unit is controlled during a production run of the packaging machine on the basis of a speed-dependent and/or temperature-dependent friction torque characteristic curve recorded using a rotary-driven measuring run carried out by the drive unit. Irrespective of whether the film transport device is used to transport an upper film or a lower film, it is easier to maintain a constant and reproducible film tension in the film material during the production run. This is due to the fact that when the drive unit is controlled, taking into account the friction torque characteristic curve recorded on the basis of the measuring run, the drive unit's own dynamics can largely be compensated for.
Sinnvoll ist es, wenn die Antriebseinheit während eines vorbestimmten Einfahrintervalls vor einem Start des Messlaufs in beiden Richtungen gedreht wird. Anhand des derart in umgekehrten Richtungen durchgeführten Einfahrintervalls lassen sich an der Antriebseinheit Hafteffekte beseitigen, wodurch im Anschluss daran der Messlauf präziser durchführbar ist, um die Eigenreibung der Antriebseinheit, vorzugsweise stufenweise über den gesamten Drehzahlbereich, zu erfassen.It makes sense if the drive unit is rotated in both directions during a predetermined run-in interval before the start of the measurement run. Using the run-in interval carried out in reverse directions in this way, sticking effects on the drive unit can be eliminated, which means that the measurement run can then be carried out more precisely in order to detect the inherent friction of the drive unit, preferably in stages over the entire speed range.
Zweckmäßig ist es, dass die Antriebseinheit während einer nach dem Einfahrintervall durchgeführten Messstrecke des Messlaufs schrittweise, mit einer kontinuierlich ansteigenden Drehzahl zum Ermitteln der Reibmoment-Kennlinie beschleunigt wird. Dadurch ergibt sich eine stufenartig ansteigende Drehzahlkennlinie. Davon abhängig lässt sich die Bestromung der Antriebseinheit messen, welche direkt proportional zum daran anliegenden Leistungsdrehmoment ist.It is expedient for the drive unit to be accelerated incrementally at a continuously increasing speed during a measuring section of the measuring run, which is carried out after the running-in interval, in order to determine the friction torque characteristic. This results in a stepwise increasing speed characteristic. Depending on this, the power supply to the drive unit can be measured, which is directly proportional to the power torque applied to it.
Insbesondere kann der Messlauf so gesteuert werden, dass die Drehzahlsprünge kontinuierlich größer werden. Dadurch kann die Eigenreibung der Antriebseinheit insgesamt genauer aufgenommen werden. Vor allem kann dies zu einem Messzeitfenster für den Messlauf führen, in dem es während des Messlaufs zu keiner Temperaturänderung der Antriebseinheit kommt.In particular, the measuring run can be controlled in such a way that the speed jumps become continuously larger. As a result, the inherent friction of the drive unit can be recorded more accurately overall. Above all, this can lead to a measurement time window for the measurement run in which there is no temperature change in the drive unit during the measurement run.
Vorzugsweise bestimmt die Steuereinrichtung auf Basis einer ihr für die Antriebseinheit vorgehaltenen Reibmoment-Temperatur-Kennlinie einen Temperaturkompensationsfaktor hinsichtlich einer während des Produktionslaufs aktuell erfassten Betriebstemperatur der Antriebseinheit und hinsichtlich einer während des Messlaufs erfassten Messlauftemperatur für die Ansteuerung der Antriebseinheit. Anhand des Temperaturkompensationsfaktors kann die Steuereinrichtung während des Produktionslaufs die temperaturabhängige Eigenreibung der Antriebseinheit kompensieren. In anderen Worten kann damit von der Steuereinrichtung kontinuierlich während des Produktionslaufs ein dynamisch an die aktuelle Betriebstemperatur der Antriebseinheit angepasster Temperaturkompensationsfaktor ermittelt und fortlaufend bei der Ansteuerung der Antriebseinheit zur Kompensation der temperaturabhängigen Eigenreibung eingesetzt werden. Anhand dieser Temperaturkompensation ist während des Produktionslaufs eine konstante und reproduzierbare Folienspannung erreichbar.The control device preferably determines a temperature compensation factor with regard to an operating temperature of the drive unit currently recorded during the production run and with regard to a measurement run temperature recorded during the measurement run for the actuation of the drive unit on the basis of a friction torque-temperature characteristic curve held available to it for the drive unit. The control device can use the temperature compensation factor to compensate for the temperature-dependent inherent friction of the drive unit during the production run. In other words, a temperature compensation factor dynamically adapted to the current operating temperature of the drive unit can be continuously determined by the control device during the production run and continuously used when controlling the drive unit to compensate for the temperature-dependent inherent friction. With this temperature compensation, a constant and reproducible film tension can be achieved during the production run.
Eine vorteilhafte Variante sieht vor, dass die Steuereinrichtung während des Produktionslaufs aus der erfassten Reibmoment-Kennlinie eine Stromversorgung der Antriebseinheit zum Erreichen einer gewünschten Folienspannung ableitet und diese angenommene Stromversorgung mittels des hinsichtlich der aktuellen Betriebstemperatur bestimmten Temperaturkompensationsfaktors dynamisch anpasst. Die Reibmoment-Kennlinie, welche mittels des Messlaufs für die Antriebseinheit ermittelt werden kann, liefert somit eine für die Eigenreibung der Antriebseinheit charakteristische Kennlinie, aus welcher eine mithilfe des Temperaturkompensationsfaktors dynamisch angepasste, tatsächlich benötigte Stromversorgung für die Antriebseinheit ableitbar ist, um das Folienmaterial mit einer gewünschten, gleichbleibenden und reproduzierbaren Folienspannung dem Verpackungsprozess zuzuführen.An advantageous variant provides that the control device derives a power supply of the drive unit from the detected friction torque characteristic during the production run to achieve a desired film tension and dynamically adapts this assumed power supply using the temperature compensation factor determined with regard to the current operating temperature. The friction torque characteristic, which can be determined by means of the measuring run for the drive unit, thus provides a characteristic curve for the drive unit's own friction, from which a dynamically adapted, actually required power supply for the drive unit can be derived using the temperature compensation factor in order to supply the film material with a supply the desired, constant and reproducible film tension to the packaging process.
Auf Basis der während des Reibermittlungslaufs gemessenen Messlauftemperatur sowie hinsichtlich der aktuellen Betriebstemperatur der Antriebseinheit kann aus der der Steuereinrichtung vorgehaltenen Reibmoment-Temperatur-Kennlinie ein Quotient hergeleitet werden, der den Temperaturkompensationsfaktor für die aktuelle Betriebstemperatur angibt. Damit lässt sich während des Produktionslaufs hinsichtlich der an der Antriebseinheit anliegenden Eigenreibung sowie unter Berücksichtigung der daran erfassten Betriebstemperatur die tatsächlich benötigte Stromversorgung der Antriebseinheit dynamisch bestimmen, um das Folienmaterial mit einer gleichbleibenden Folienspannung zu transportieren.On the basis of the measurement run temperature measured during the friction determination run and with regard to the current operating temperature of the drive unit, a quotient can be derived from the friction torque-temperature characteristic curve held by the control device, which indicates the temperature compensation factor for the current operating temperature. This means that the power supply actually required for the drive unit can be dynamically determined during the production run with regard to the inherent friction present on the drive unit and taking into account the operating temperature recorded in order to transport the film material with a constant film tension.
Anhand der vorliegenden Erfindung ist es möglich, die für die Antriebseinheit, einschließlich eines daran ausgebildeten Servomotors, eines daran ausgebildeten Getriebes und/oder daran ausgebildeter Lagerstellen, charakteristische Eigenreibung, sprich dessen allgemeine drehzahl- und/oder temperaturbedingte Eigendynamik, mittels der Durchführung des Messlaufs und der damit erfassten Reibmoment-Kennlinie aufzunehmen. Ein daraus für eine gewünschte Folienspannung abgeleitetes Reibmoment bzw. eine dafür eingesetzte Stromversorgung der Antriebseinheit zum Erreichen der gewünschten Folienspannung kann darüber hinaus mittels des Temperaturkompensationsfaktors hinsichtlich einer speziellen, d.h. aktuell gemessenen Betriebstemperatur der Antriebseinheit angepasst werden, um den Einfluss einer sich ändernden Betriebstemperatur während des Produktionslaufs auf das Reibungsverhalten der Antriebseinheit zu kompensieren, damit die Folienspannung während des Produktionslaufs in hohem Maße gleichbleibend und reproduzierbar ist.On the basis of the present invention, it is possible to determine the inherent friction characteristic of the drive unit, including a servo motor formed thereon, a gear mechanism formed thereon and/or bearing points formed thereon, i.e. its general speed and/or temperature-related inherent dynamics, by carrying out the measuring run and of the friction torque characteristic recorded in this way. A friction torque derived from this for a desired film tension or a power supply of the drive unit used for this purpose to achieve the desired film tension can also be adjusted by means of the temperature compensation factor with regard to a special, i.e. currently measured, operating temperature of the drive unit in order to counteract the influence of a changing operating temperature to compensate for the friction behavior of the drive unit during the production run, so that the film tension is highly consistent and reproducible during the production run.
Die Erfindung wird anhand der folgenden Figuren genauer erläutert. Es zeigen:
- Fig. 1
- eine schematische Seitenansicht einer Verpackungsmaschine, die als Tiefziehverpackungsmaschine ausgebildet ist,
- Fig. 2
- eine Perspektivdarstellung einer Verpackungsmaschine, die als Traysealer vorliegt,
- Fig. 3
- ein Messlauf bzw. Reibermittlungslauf für eine Antriebseinheit einer Folientransporteinrichtung der Verpackungsmaschine, und
- Fig. 4
- eine Reibmoment-Temperatur-Kennlinie zum Ermitteln eines Temperaturkompensationsfaktors.
- 1
- a schematic side view of a packaging machine, which is designed as a thermoforming packaging machine,
- 2
- a perspective view of a packaging machine that is available as a traysealer,
- 3
- a measuring run or friction determination run for a drive unit of a film transport device of the packaging machine, and
- 4
- a friction torque-temperature characteristic for determining a temperature compensation factor.
Gleiche Komponenten sind in den Figuren durchgängig mit den gleichen Bezugszeichen versehen.Identical components are provided with the same reference symbols throughout the figures.
In der dargestellten Ausführungsform ist die Formstation 3 als eine Tiefziehstation ausgebildet, bei der in die Unterfolie 9 durch Tiefziehen, beispielsweise mittels Druckluft und/oder Vakuum, Mulden M geformt werden. Dabei kann die Formstation 3 derart ausgebildet sein, dass in der Richtung senkrecht zur Transportrichtung R mehrere Mulden M nebeneinander gebildet werden. In Transportrichtung R hinter der Formstation 3 ist eine Einfüllstrecke 10 vorgesehen, in der die in der Unterfolie 9 geformten Mulden M mit Produkten befüllt werden.In the illustrated embodiment, the forming
Die Siegelstation 4 verfügt über eine hermetisch verschließbare Kammer 4a, in der die Atmosphäre in den Mulden M vor dem Versiegeln mit der von einer Oberfolientransporteinrichtung 12 abgegebenen Oberfolie 30 z.B. evakuiert und/oder durch Gasspülen mit einem Austauschgas oder mit einem Gasgemisch ersetzt werden kann.The sealing
Die Querschneideeinrichtung 5 kann als Stanze ausgebildet sein, die die Unterfolie 9 und die Oberfolie 30 in einer Richtung quer zur Transportrichtung R zwischen benachbarten Mulden M durchtrennt. Dabei arbeitet die Querschneideeinrichtung 5 derart, dass die Unterfolie 9 nicht über die gesamte Breite aufgetrennt wird, sondern zumindest in einem Randbereich nicht durchtrennt wird. Dies ermöglicht einen kontrollierten Weitertransport durch die Transportkette 11.The
Die Längsschneideeinrichtung 6 kann als eine Messeranordnung ausgebildet sein, mit der die Unterfolie 9 und die Oberfolie 30 zwischen benachbarten Mulden M und am seitlichen Rand der Unterfolie 9 in der Transportrichtung R durchtrennt werden, sodass hinter der Längsschneideeinrichtung 6 vereinzelte Verpackungen V vorliegen.The
Die Tiefziehverpackungsmaschine 2 verfügt ferner über eine Steuereinrichtung 13. Sie hat die Aufgabe, die in der Tiefziehverpackungsmaschine 2 ablaufenden Prozesse zu steuern und zu überwachen. Eine Anzeigevorrichtung 14 mit Bedienelementen 15 dient zum Visualisieren bzw. Beeinflussen der Prozessabläufe in der Tiefziehverpackungsmaschine 2 für bzw. durch einen Bediener.The
Die Schalenverschließmaschine 16 aus
An den in
In der Tiefziehverpackungsmaschine 1 wird dafür als Folientransporteinrichtung 25a eingangs der Tiefziehverpackungsmaschine 1 eine Unterfolientransporteinrichtung 26 eingesetzt. Die Unterfolientransporteinrichtung 26 weist eine Antriebseinheit 27 auf. Die Steuereinrichtung 13 ist zum Steuern eines Betriebs der Antriebseinheit 27 konfiguriert. Anhand der Antriebseinheit 27 sowie anhand einer Ansteuerung einer weiteren, nicht gezeigten Antriebseinheit der Transportketten 11 kann die Unterfolie 9 mit einer gewünschten Folienspannung der Formstation 3 für den darin stattfindenden Formprozess zugeführt werden.In the
Des Weiteren zeigt
In
Vor allem zeigt
Ferner zeigt
Anhand der in
Anhand des Temperaturkompensationsfaktor 37 ist es möglich, die aus
In
Ferner zeigt
Die
Claims (12)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021120371.6A DE102021120371A1 (en) | 2021-08-05 | 2021-08-05 | PACKAGING MACHINE WITH FILM TRANSPORT DEVICE AND PROCESS |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4137417A1 true EP4137417A1 (en) | 2023-02-22 |
Family
ID=82655375
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22185621.4A Pending EP4137417A1 (en) | 2021-08-05 | 2022-07-19 | Packaging machine with film transport device and method |
Country Status (4)
Country | Link |
---|---|
US (1) | US11945619B2 (en) |
EP (1) | EP4137417A1 (en) |
CN (1) | CN115703552A (en) |
DE (1) | DE102021120371A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021120371A1 (en) * | 2021-08-05 | 2023-02-09 | Multivac Sepp Haggenmüller Se & Co. Kg | PACKAGING MACHINE WITH FILM TRANSPORT DEVICE AND PROCESS |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1947437A1 (en) * | 2007-01-17 | 2008-07-23 | Abb Research Ltd. | A method of determining torque |
WO2020229355A1 (en) * | 2019-05-10 | 2020-11-19 | Gea Food Solutions Germany Gmbh | Packaging machine without dancer |
Family Cites Families (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3625447A (en) * | 1969-05-05 | 1971-12-07 | Druckmaschuenwerke Leipzig Veb | Apparatus for control of web tension in multicolor printing machines |
US4519039A (en) | 1982-07-23 | 1985-05-21 | Westinghouse Electric Corp. | Digital coil diameter function generator and reel motor drive system embodying the same |
IT1227244B (en) * | 1987-10-12 | 1991-03-27 | Monforts Gmbh & Co A | FINISHING AND WITHDRAWAL SYSTEM. |
US5199623A (en) * | 1989-01-06 | 1993-04-06 | Valmet Paper Machinery Inc. | Device for supporting, turning and spreading of a web |
US5640835A (en) * | 1991-10-16 | 1997-06-24 | Muscoplat; Richard | Multiple envelope with integrally formed and printed contents and return envelope |
US20040146602A1 (en) * | 2000-11-28 | 2004-07-29 | Garwood Anthony J.M. | Continuous production and packaging of perishable goods in low oxygen environments |
DE19757009A1 (en) * | 1997-12-20 | 1999-06-24 | Schlafhorst & Co W | Yarn paraffin coating monitor which measures the friction slip between the bobbin surface and the friction drum at the bobbin-winder |
DE10014535A1 (en) * | 2000-03-23 | 2001-09-27 | Roland Man Druckmasch | Method for operating a web-fed rotary printing press |
US6433499B1 (en) | 2000-11-29 | 2002-08-13 | Heidelberger Druckmaschinen Ag | Device and method for automatic tension transducer calibration |
ITBO20020463A1 (en) * | 2002-07-18 | 2004-01-19 | Awax Progettazione | APPARATUS FOR CONTINUOUS AND SEALING THERMAL WELDING OF LONGITUDINAL AND OVERLAPPING ELEMENTS OF TUBULAR ELEMENTS OF THERMOPLASTIC FILM OF SPES |
DE102005056802A1 (en) * | 2005-11-29 | 2007-05-31 | Bosch Rexroth Ag | Regulation of the web tension of a web |
DE102006004307B4 (en) * | 2006-01-31 | 2013-08-14 | Windmöller & Hölscher Kg | Method for measuring and adjusting web tension between inking units of a multicolor machine |
DE202006012802U1 (en) * | 2006-08-21 | 2006-11-16 | Knäbel, Holmer, Dipl.-Ing. | Roller for stretching strip material transversely comprises two tubular sections mounted at their inner ends on stub axles which fit into ball bearings mounted inside ball-and-socket joints in adjustable sleeves attached to machine frame |
DE102007037564B4 (en) * | 2007-08-09 | 2013-11-14 | Robert Bosch Gmbh | Method for axis correction in a processing machine |
DE102007049680A1 (en) * | 2007-10-17 | 2009-04-23 | Robert Bosch Gmbh | Method for calculating the diameter of a web winding on a roll and winding control system |
DE102007059066A1 (en) * | 2007-12-07 | 2009-06-10 | Robert Bosch Gmbh | Axis correction method for a processing machine and a processing machine |
DE102007062454A1 (en) * | 2007-12-22 | 2009-07-02 | Robert Bosch Gmbh | Method for regulating a web tension and / or a register |
DE102008006562A1 (en) * | 2008-01-29 | 2009-10-15 | Böwe Systec AG | Method and device for transporting paper in a paper handling system from a first transport to a second transport |
DE102008021445B4 (en) * | 2008-04-29 | 2016-03-24 | Robert Bosch Gmbh | Web-processing machine and method for its control |
DE102008058458A1 (en) * | 2008-11-21 | 2010-05-27 | Robert Bosch Gmbh | Axis correction method for a processing machine and a processing machine |
JP2011057412A (en) * | 2009-09-11 | 2011-03-24 | Ricoh Co Ltd | Carrying device, image forming device, carrying object medium carrying method and program |
DE102010012263B3 (en) * | 2010-03-22 | 2011-07-28 | Wafios AG, 72764 | Device for controlling the drive of a reel |
DE102010013782A1 (en) * | 2010-04-03 | 2011-10-06 | Robert Bosch Gmbh | Method for determining at least one controller parameter of a dancer position control element |
US8844784B2 (en) * | 2010-06-28 | 2014-09-30 | Hewlett-Packard Development Company, L.P. | Controlling drive settings in a press |
US8657436B2 (en) * | 2011-07-11 | 2014-02-25 | Seiko Epson Corporation | Media conveyance device, printing device, and media conveyance method |
FI124079B (en) * | 2011-09-02 | 2014-03-14 | Pro Hydro Ab Oy | Emptying device for an elastic packaging container and method for emptying an elastic container |
DE102011115881B4 (en) * | 2011-10-12 | 2014-11-20 | Multivac Sepp Haggenmüller Gmbh & Co. Kg | Thermoforming packaging machine with one-sided film feeding device |
DE102013222924A1 (en) * | 2013-11-11 | 2015-05-28 | Hellermann Tyton Gmbh | Portable cable tie tool |
EP3071412B1 (en) | 2013-11-21 | 2020-04-22 | Hewlett-Packard Development Company, L.P. | Motor characterization in a printer |
DE102015201325A1 (en) * | 2014-02-21 | 2015-08-27 | Heidelberger Druckmaschinen Ag | Method and device for holding down a sheet on the feed table of a sheet-processing machine |
JP6988334B2 (en) * | 2017-09-29 | 2022-01-05 | セイコーエプソン株式会社 | Image reader |
DE102017131417A1 (en) | 2017-12-29 | 2019-07-04 | Weber Maschinenbau Gmbh Breidenbach | Device for packaging objects |
WO2019219966A1 (en) * | 2018-05-18 | 2019-11-21 | Gea Food Solutions Germany Gmbh | Unwinding a film roll in a packaging machine |
AU2019319726B2 (en) * | 2018-08-06 | 2022-04-07 | Lantech.Com, Llc | Stretch wrapping machine with curve fit control of dispense rate |
FI129063B (en) * | 2019-11-22 | 2021-06-15 | Valmet Technologies Oy | Method of controlling caliper of the fiber web of a parent roll and production line for producing fiber webs |
DE102021120371A1 (en) * | 2021-08-05 | 2023-02-09 | Multivac Sepp Haggenmüller Se & Co. Kg | PACKAGING MACHINE WITH FILM TRANSPORT DEVICE AND PROCESS |
-
2021
- 2021-08-05 DE DE102021120371.6A patent/DE102021120371A1/en active Pending
-
2022
- 2022-07-19 EP EP22185621.4A patent/EP4137417A1/en active Pending
- 2022-08-04 US US17/881,376 patent/US11945619B2/en active Active
- 2022-08-05 CN CN202210941081.XA patent/CN115703552A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1947437A1 (en) * | 2007-01-17 | 2008-07-23 | Abb Research Ltd. | A method of determining torque |
WO2020229355A1 (en) * | 2019-05-10 | 2020-11-19 | Gea Food Solutions Germany Gmbh | Packaging machine without dancer |
Also Published As
Publication number | Publication date |
---|---|
US11945619B2 (en) | 2024-04-02 |
DE102021120371A1 (en) | 2023-02-09 |
CN115703552A (en) | 2023-02-17 |
US20230038155A1 (en) | 2023-02-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69833701T2 (en) | Machine for the production of bags | |
DE3031399C2 (en) | Device for forming, filling and closing packages | |
EP1790601B2 (en) | Control of the web tension of a running web | |
EP2522581B1 (en) | Workstation for a packaging machine and method for swapping tools | |
DE2527655A1 (en) | DEVICE FOR HANDLING RAILS OF MATERIAL | |
DE3878224T2 (en) | PACKAGING MACHINE WITH A DEVICE FOR PREVENTING THE PINNING OF OBJECTS TO PACKAGING IN A FINAL SEALING MECHANISM. | |
AT512676B1 (en) | Wire drawing device | |
EP4137417A1 (en) | Packaging machine with film transport device and method | |
EP1918206B1 (en) | Filling device and method for filling viscose bulk material | |
EP2241862A2 (en) | Packaging machine and display device for same | |
DE102018116507A1 (en) | Packaging machine with sealing station | |
EP3587286B1 (en) | Method for determining process parameters for a packaging machine | |
EP4043167A1 (en) | Device for coating the narrow side of plate-shaped workpieces and method for applying adhesive | |
DE10152891A1 (en) | Precision punching of thermoformed containers from thermoplastic film involves compensation for changes to conveyer roller chain temperature and/or tension | |
EP2065324A2 (en) | Method for setting web tension in a processing machine | |
DE102009042019A1 (en) | Method for separating film pieces from film web during production of photovoltaic modules, involves separating film web into film pieces, and generating controlled slack of film web before supply roller pair | |
DE102020204752A1 (en) | PACKAGING MACHINE WITH MELTING POINT DETECTION AND PROCEDURE FOR IT | |
DE102006023825A1 (en) | Method and system for controlling the drive of a printing and / or processing machine | |
DE60305408T2 (en) | Horizontal packaging machine for producing fluid-tight packaging equipped with a zip closure | |
WO2019219966A1 (en) | Unwinding a film roll in a packaging machine | |
DE102006040802A1 (en) | Plastic foil web deep-draw packaging assembly has upright sandwich arrangement of heated plates and advancing plastic foil web | |
EP3009355A1 (en) | Method for manufacturing a packaging | |
DE102015005066B4 (en) | A method of moving a web of thermoplastic plastic film through a preheater to heat a web of thermoplastic plastic film | |
EP0648177B1 (en) | Process and device for supplying a packaging machine with packaging material | |
EP3529035A1 (en) | Method and facility for producing a plastic film |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20230726 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230801 |