EP4565398A1 - Vorrichtung zum beschichten eines werkstücks - Google Patents
Vorrichtung zum beschichten eines werkstücksInfo
- Publication number
- EP4565398A1 EP4565398A1 EP23751009.4A EP23751009A EP4565398A1 EP 4565398 A1 EP4565398 A1 EP 4565398A1 EP 23751009 A EP23751009 A EP 23751009A EP 4565398 A1 EP4565398 A1 EP 4565398A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- adhesive
- unit
- workpiece
- coating material
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
- B27D5/003—Other working of veneer or plywood specially adapted to veneer or plywood securing a veneer strip to a panel edge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G11/00—Applying adhesives or glue to surfaces of wood to be joined
Definitions
- the invention relates to a device and a method for coating a workpiece, which preferably consists at least in sections of wood, wood materials, plastic or the like.
- workpieces are often provided with a coating material on one of their surfaces, for example an edge.
- the coating material is usually applied using a suitable joining or
- Adhesive that is applied for example in the form of hot melt adhesive, to the workpiece or to the coating material.
- the joining agent is activated or kept activated during the coating process using a suitable device, usually heated using a suitable energy source.
- Laser and hot air units have become particularly popular as energy sources, although numerous other technologies such as microwave, infrared, plasma, ultrasound or the like are also possible.
- the joining agent is at the appropriate temperature or Temperature window is heated.
- DE 10 2017 122 701 A discloses a coating device according to the preamble of claim 1, in which the temperature of the joining agent is monitored by a temperature sensor.
- the measurement results of the temperature sensor are susceptible to fluctuations, so that the desired optimization of the joining material temperature cannot be achieved with sufficient reliability.
- DE 10 2019 133 934 A discloses a generic device in which a sensor measures the temperature of the adhesive through a hot air nozzle.
- a sensor measures the temperature of the adhesive through a hot air nozzle.
- the invention is based on the object of providing a device of the type mentioned at the outset, which, with a simple construction, enables precise monitoring of at least one operating variable of the adhesive.
- the invention is based on the idea of taking into account the exceptionally difficult conditions and tight spaces in the area of the pressing unit by means of a new arrangement in which the at least one sensor or . whose imaginary sensor beam is led out of the plane of the workpiece to be coated.
- the at least one sensor has a main measuring direction which is at an angle to the conveying plane, at least in the area of the adhesive.
- the design according to the invention results in completely new arrangement options for the at least one sensor, without the need for complicated additional components.
- the angular arrangement of the main measuring direction makes it possible to integrate the at least one sensor not into the narrow joining gap, but at any location, which can also be located at a greater distance from the joining area. This protects the at least one sensor from excessive contamination or temperature fluctuations, which allows significantly increased precision of the measurement result.
- the angular arrangement of the main measuring direction also allows measurements to be carried out particularly close to the actual joining point and thus to obtain particularly meaningful measurement results.
- the main measuring direction of the at least one sensor has an angle a of at least 10 ° relative to the conveying plane, at least in the area of the adhesive.
- This allows an imaginary measuring beam, which extends along the main measuring direction, to be introduced particularly effectively into the usually narrow joining gap between the workpiece and the coating material, while the above-mentioned advantages are achieved.
- the Invention provides that the main measuring direction of the at least one sensor has an angle a of at most 40 °, preferably at most 30 °, with respect to the conveying plane, at least in the area of the adhesive.
- the inventors have found that larger angles generally do not result in the above-mentioned advantages becoming more pronounced. However, larger angles from the ranges mentioned would increasingly lead to reduced measurement precision, which should be avoided as far as possible within the scope of the invention.
- the at least one sensor can in principle measure the operating size of the adhesive at any point. According to a further development of the invention, however, it is provided that the at least one sensor is set up to measure the operating size of the adhesive in the area of the pressure unit or of the corresponding joining point. This results in particularly meaningful measurement results that represent a good basis for achieving high joining quality.
- the senor has a pyrometer and/or bolometer and/or a semiconductor sensor.
- the at least one sensor has a focusing device, which is preferably set up to focus an imaginary measuring beam of the sensor towards the adhesive to be measured.
- a focusing device which is preferably set up to focus an imaginary measuring beam of the sensor towards the adhesive to be measured.
- this design contributes to precise measurement results, among other things because the imaginary measuring beam can be directed particularly precisely to suitable measuring points.
- the focusing also allows the geometry of the imaginary measuring beam to be adapted to the spatial conditions in the narrow joining gap and the imaginary measuring beam to be approximately in the To make the area of the joining gap narrower so that it can reach the adhesive layer to be measured without collision. This makes a significant contribution to achieving the advantages mentioned above.
- the device has an adjustable guide, in particular a hold-down device, for the coating material, with at least one sensor being attached to the adjustable guide.
- an adjustable guide initially enables flexible adaptability of the device according to the invention to changing geometries of the workpiece or of the coating material.
- attaching at least one sensor to the adjustable guide allows the position of the sensor to automatically adapt to the changing geometries of the coating material, which in turn contributes to a precise and meaningful measurement result.
- At least one sensor is attached via a holder which has a comparatively low thermal conductivity. This prevents the sensor attached to the holder from being exposed to excessive temperature influences, which in turn improves the measurement accuracy and increases the service life of the sensor.
- At least one sensor can have a protective cover, which preferably has a material with high thermal conductivity, such as aluminum in particular.
- This measure which initially sounds paradoxical, means that any heat effect on the sensor is evenly distributed in the protective cover, so that the sensor is heated evenly at best. This will make the Measurement accuracy further increased, as inhomogeneous heating of the sensor would impair the measurement accuracy.
- the protective cover has a thermal conductivity that is at least 3 times, preferably at least 10 times, as large as the thermal conductivity of the conductor. This results in a good combination of both a thermal separation of the sensor from the heat source and, if necessary, even heating of the sensor.
- the protective cover has a permeable, in particular transparent section through which the sensor can measure. This allows effective thermal decoupling of the sensor to be combined with high measurement accuracy.
- the at least one sensor has a shielding unit, such as in particular a protective cover, at least in the measuring direction, which preferably has heat-insulating properties. This makes it easy to achieve effective thermal decoupling of the sensor, which further increases the measurement accuracy and the service life of the sensor.
- a shielding unit such as in particular a protective cover
- the concept according to the invention develops its advantages in particular in a device which, according to a further development of the invention, has an adhesive application unit for applying adhesive to the coating material and/or the workpiece and/or which has an adhesive activation unit for activating adhesive.
- the device has an electronic control unit which is connected and set up with at least one sensor and with the adhesive application unit and/or the adhesive activation unit and/or the conveying unit, the adhesive application unit and/or the adhesive activation unit and/or to control the conveyor unit on the basis of a measurement result obtained from the at least one sensor.
- an optimal joining connection between the workpiece and the coating material can be achieved, since the operation of the adhesive application unit and/or adhesive activation unit and/or the conveying unit can be set and, if necessary, regulated in such a way that optimal operating parameters of the adhesive result during joining.
- control unit can adjust the operation of the adhesive application unit and/or adhesive activation unit and/or the conveying unit accordingly in order to bring the actual value closer to the to bring the setpoint.
- a particularly quick and particularly flexible process sequence with regard to the geometry of the workpiece to be coated results if, according to a further development of the invention, at least the pressing unit and the at least one sensor can be moved together in the device and can be rotated about an axis perpendicular to the conveying plane.
- the pressing unit and the sensor as well as, if necessary Further components are arranged stationary and the workpiece is moved in relation to these components. Mixed forms of both concepts are also possible within the scope of the invention.
- Fig. 1 shows schematically a partial perspective view of a device according to an embodiment of the invention
- Fig. 2 shows schematically a partial top view of the one shown in FIG. 1 shown device.
- FIG. 1 A device 1 for coating a workpiece 2 is shown in FIG. 1 shown schematically in a partial perspective view.
- the device 1 is used to coat workpieces 2, which preferably consist at least in sections of wood, wood material, plastic or the like, as are widely used in the furniture and component industry.
- the coating material 4 can be, for example, a narrow surface coating (edge) made of a wide variety of materials such as plastic, veneer, paper or even metal. Alternatively or additionally, however, a wide surface or any other surface of a workpiece 2 can also be provided with a coating material 4.
- an adhesive 4′ is provided on the side of the coating material 4 facing the workpiece 2.
- the adhesive 4 ' can be, for example, an adhesive that can be activated by heat, such as hot melt adhesive.
- the coating material 4 has an integral layer 4 ', which develops adhesive properties through activation, such as various meltable plastics.
- the entire coating material 4 can also consist of a corresponding material, so that there is no discrete adhesive layer 4 '.
- the adhesive 4 'can also be supplied separately from the coating material 4, for example as an adhesive web or adhesive strip.
- the adhesive 4 'can also be applied to the coating material 4 in a conventional manner by means of an application roller, which is shown in FIG. 1 shown component 70 can then have a corresponding adhesive application unit. Overall, the adhesive can also first be applied to the surface of the workpiece to be coated.
- the coating device 1 comprises a pressing device 10, which in the present embodiment has a pressure roller and serves to press the coating material 4 onto a surface 2 'of the workpiece 2 to be coated.
- the coating device 1 includes a conveyor unit, which in the present embodiment is designed in the manner of a so-called stationary machine.
- the conveyor unit has a support section 20 which, together with those shown in FIG. 1 shown components of the device 1 can be moved parallel to a conveying plane and can be rotated about an axis (C) perpendicular to the conveying plane.
- the conveying level corresponds to the level of the workpiece 2, which is stationary via suitable holding means 2 (not shown). is arranged.
- the conveyor unit can serve to convey the workpiece 2 and for this purpose, for example, have a conveyor element in the form of a conveyor belt, conveyor belt, conveyor chain or the like. Mixed variants of both concepts are also possible within the scope of the invention, with the conveying unit 20 always serving to bring about a relative movement between the workpiece 2 and the pressing device 10.
- the coating device 1 includes an adhesive activation unit 70, which in the present embodiment includes a nozzle arrangement 74 for dispensing a heated fluid which serves to activate the adhesive 4′.
- the heated fluid is supplied as a volume flow V via a supply line 72 to the nozzle arrangement 74, with a fluid supply and a heating device being provided upstream, for example.
- the fluid supply can advantageously also be a pressurized fluid supply, which supplies the fluid to the nozzle arrangement 74 at an excess pressure, purely for example, of at least 1.5 bar.
- the heated (pressure) fluid can be hot air.
- the fluid it is also possible for the fluid to contain other gases and possibly also liquids or Contains liquid droplets.
- adhesive activation unit 70 may also include a variety of other energy sources, such as a laser source, an LED source, an infrared source, a microwave source, a plasma source, etc.
- the coating device 1 in the present embodiment has a temperature sensor 30 for detecting a temperature of the adhesive 4 ', for example as a pyrometer or bolometer or semiconductor sensor or (Thermal) camera can be designed.
- a temperature sensor 30 for detecting a temperature of the adhesive 4 '
- a pyrometer or bolometer or semiconductor sensor or (Thermal) camera can be designed.
- other sensors can also be used within the scope of the invention to detect an operating variable, for example to detect the porosity of the workpiece, the viscosity of the joining agent, the layer thickness of the joining agent or the like.
- the temperature sensor 30 has a main measuring direction 32, which is shown in FIG. 1 is shown in dashed lines and can be viewed as the center line of an imaginary measuring beam 34.
- the imaginary measuring beam 34 is in Fig. 1 extends in a straight line from the sensor 30 to the adhesive 4 'to be measured, it is also possible within the scope of the invention to deflect the imaginary measuring beam by suitable means, such as (at least) a mirror, a prism or other deflection means (not shown).
- the imaginary measuring beam 34 hits the adhesive layer 4 'immediately in front of the joining point at which the coating material 4 and the workpiece 2 are brought into contact with one another.
- the main measuring direction 32 of the sensor 30 has an inclination relative to the conveying plane and is therefore arranged at an angle to the conveying plane.
- the angle of inclination a between the main ring measuring direction 32 and the conveying plane can be, for example, 20° and is preferably in a range between 10° and 40°, preferably at most 30°.
- Fig. 1 it can also be seen that the imaginary measuring beam 34 tapers towards the adhesive layer 4 '.
- This focusing of the imaginary measuring beam is generated by a focusing device 40, which can have, for example, a lens or other suitable focusing elements.
- the focusing device 40 is in the present Embodiment integrated into a holder 50, by means of which the sensor 30 is attached to the device 1.
- the holder 50 is attached to a hold-down device 6, which is vertically adjustable and serves to guide the coating material 4 vertically. Due to the vertical adjustability of the hold-down device 6, the holder 50 with the sensor 40 is also vertically adjustable and can therefore be adapted to different coating materials 4.
- the holder 50 is made of a material with a comparatively low thermal conductivity, such as steel, stainless steel or a ceramic material. Other suitable materials can of course also be used within the scope of the invention.
- the senor 30 is accommodated in a protective cover 36, which, in contrast to the holder 50, has a material with high thermal conductivity such as aluminum.
- the thermal conductivity of the protective cover 36 in the present embodiment is at least three times, for example ten times, as great as the thermal conductivity of the holder 50.
- the protective cover 36 has a transparent section 38 in the measuring direction of the sensor 30, through which the sensor 30 can measure.
- a protective cover 60 is provided as a shielding unit in the measuring direction of the sensor 30, which preferably also has heat-insulating properties and has a permeable section 62 or designed as a free space.
- the protective cover 60 helps protect the sensor 30 from heat radiation or to protect convection.
- an electronic control unit 80 such as a control computer.
- the control unit 80 is connected to the sensor 30 and the adhesive activation unit or Adhesive application unit 70 is connected and can also be connected to the conveying unit 20.
- the electronic control unit 80 receives measurement data from the sensor 30 about the temperature or other important parameters that were measured by the sensor 30.
- the electronic control unit 80 can then compare the measured values obtained with suitable target values.
- the electronic control unit can adjust the operating parameters of the adhesive activation unit or Control or. adjust to ensure that the measured values approach the desired target values. In this way, not only can the quality of the joining result be monitored, but the operating parameters of the device 1 can also be optimized and, if necessary, controlled in a fully or partially automated manner in order to achieve an optimal coating result.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Coating Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022119457.4A DE102022119457A1 (de) | 2022-08-03 | 2022-08-03 | Vorrichtung zum Beschichten eines Werkstücks |
| PCT/EP2023/071259 WO2024028305A1 (de) | 2022-08-03 | 2023-08-01 | Vorrichtung zum beschichten eines werkstücks |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4565398A1 true EP4565398A1 (de) | 2025-06-11 |
| EP4565398B1 EP4565398B1 (de) | 2026-04-29 |
Family
ID=87556045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23751009.4A Active EP4565398B1 (de) | 2022-08-03 | 2023-08-01 | Vorrichtung zum beschichten eines werkstücks |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4565398B1 (de) |
| DE (1) | DE102022119457A1 (de) |
| WO (1) | WO2024028305A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024118011A1 (de) | 2024-06-26 | 2025-12-31 | Homag Gmbh | Verfahren zum Beschichten eines Werkstücks sowie Beschichtungsvorrichtung |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2347873B1 (de) * | 2005-11-23 | 2022-03-23 | HOMAG GmbH | Verfahren und Vorrichtung zur Beschichtung von Bauteilen |
| DE102010032845A1 (de) | 2010-07-30 | 2012-02-02 | Ima Klessmann Gmbh Holzbearbeitungssysteme | Vorrichtung zur Beschichtung von Werkstücken |
| EP2902161B1 (de) | 2014-02-04 | 2017-08-23 | BIESSE S.p.A. | Maschine zur kantenbearbeitung von holzpaneelen oder dergleichen |
| DE102014008455A1 (de) | 2014-06-05 | 2015-12-17 | Ima Klessmann Gmbh Holzbearbeitungssysteme | Vorrichtung und Verfahren zum Aufbringen eines Kantenbandes auf eine Schmalseite eines Werkstücks |
| ITUB20152366A1 (it) | 2015-07-21 | 2017-01-21 | Biesse Spa | Macchina per la bordatura di pannelli di legno o simili |
| DE102017205208A1 (de) | 2017-03-28 | 2018-10-04 | Homag Gmbh | Vorrichtung und Verfahren zum Beschichten eines Werkstücks |
| DE102017122701A1 (de) | 2017-09-29 | 2019-04-04 | Homag Gmbh | Beschichtungsvorrichtung sowie Beschichtungsverfahren |
| DE102018125609B4 (de) | 2018-10-16 | 2021-11-25 | Surteco Gmbh | Verfahren und Vorrichtung zum Befestigen einer Kantenleiste |
| DE102019113932A1 (de) | 2019-05-24 | 2020-11-26 | Homag Gmbh | Verfahren zum Beschichten eines Bauteils sowie Beschichtungsvorrichtung |
| DE102019133934A1 (de) | 2019-12-11 | 2021-06-17 | Homag Gmbh | Vorrichtung und Verfahren zum Beschichten eines Werkstücks |
-
2022
- 2022-08-03 DE DE102022119457.4A patent/DE102022119457A1/de active Pending
-
2023
- 2023-08-01 WO PCT/EP2023/071259 patent/WO2024028305A1/de not_active Ceased
- 2023-08-01 EP EP23751009.4A patent/EP4565398B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP4565398B1 (de) | 2026-04-29 |
| DE102022119457A1 (de) | 2024-02-08 |
| WO2024028305A1 (de) | 2024-02-08 |
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