EP4072801A1 - Vorrichtung und verfahren zum beschichten eines werkstücks - Google Patents
Vorrichtung und verfahren zum beschichten eines werkstücksInfo
- Publication number
- EP4072801A1 EP4072801A1 EP20824193.5A EP20824193A EP4072801A1 EP 4072801 A1 EP4072801 A1 EP 4072801A1 EP 20824193 A EP20824193 A EP 20824193A EP 4072801 A1 EP4072801 A1 EP 4072801A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- workpiece
- shielding
- activation
- joining means
- 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
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
Definitions
- the invention relates to a device and a method for coating a workpiece which preferably consists at least in sections of wood, wood-based 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 by means of a suitable joining or jointing device.
- Adhesive that is applied to the workpiece or the coating material for example in the form of a hot melt adhesive.
- the joining means is activated or kept activated in the course of the coating process by means of a suitable device, usually heated by means of a suitable energy source.
- a suitable device usually heated by means of a suitable energy source.
- laser and hot air units have established themselves as energy sources, with numerous other technologies such as microwave, infrared, plasma, ultrasound or the like also coming into consideration.
- the joining agent is heated to the appropriate temperature or temperature window.
- DE 102017 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 prone to fluctuations, so that the desired optimization of the temperature of the joining agent cannot be achieved with sufficient reliability.
- the invention is based on the knowledge that in a generic coating device, fluctuations in the measurement result of a sensor such as a temperature sensor are primarily caused by soiling of the same. It is therefore provided according to the invention that the coating device has a shielding device for shielding a sensor section of the sensor.
- zero joints particularly high-quality so-called "zero joints” can be created, in which the joint between the coating material and the workpiece is practically no longer visible.
- a high-quality zero joint also has technical advantages, such as high impermeability to moisture and high strength of the joint.
- the shielding device can be designed in a wide variety of ways. According to a development of the invention, however, it is provided that the shielding device has a barrier fluid outlet in order to discharge barrier fluid for shielding the sensor section. In this way, the desired shielding effect can be achieved in a particularly simple manner, and the device also has a simple construction, since a fluid supply (such as a compressed air supply) is usually available anyway in machines of the type under discussion here.
- a fluid supply such as a compressed air supply
- the activation device has a Has outlet arrangement for dispensing a preferably heated fluid, in particular gas, for activating the joining means.
- a suitable source for fluid is already available, which can provide an additional function for providing a barrier fluid for shielding the sensor section with minimal technical effort.
- the shielding device can also be provided independently of the activation device within the scope of the invention, it is preferred according to a development of the invention that the shielding device is at least partially integrated into the activation device. In this way, the shielding device can be provided not only with minimal structural effort, but also in a particularly compact design. It should be noted that the sensor must record the operating size of the joining agent in a narrow joint gap between the coating material and the workpiece, so that a compact design is of particular importance for the technical feasibility and construction of the device.
- the activation device in particular the outlet arrangement, has at least one barrier fluid outlet in order to emit barrier fluid for shielding the sensor section.
- a barrier fluid outlet within the scope of the present invention is possible with minimal effort and without any significant change in the overall structure.
- a fluid outlet (which is already present) of the outlet arrangement can serve as a barrier fluid outlet so that - apart from a suitable connection or integration of the sensor on or in the nozzle arrangement - no structural change whatsoever
- At least one barrier fluid outlet is provided independently of the fluid outlets of the outlet arrangement. In this way, depending on the design of the outlet arrangement, an easier connection of the sensor can be achieved, which in particular can also enable existing coating devices to be retrofitted more easily.
- the shielding device has a suction device with at least one suction opening for generating a barrier fluid flow.
- the desired barrier fluid effect can be achieved not only by blowing in but also by suction, whereby both concepts can also be combined.
- the senor is set up to transmit and / or receive a sensor signal for detecting the operating variable of the joining means, which signal preferably runs through at least one barrier fluid outlet and / or the at least one suction opening.
- the device has at least one deflection device for deflecting at least one sensor signal.
- this results in a particularly compact design, particularly in the area of the So-called joint gap enables, because usually you have to feel horizontally in the joint gap, while the installation space is extremely limited in the horizontal direction.
- the deflection device allows the sensor signal to follow the existing geometry in the area of the joint gap and, for example, run horizontally or obliquely and then, for example, be deflected in the vertical direction, so that the sensor can be provided outside the joint gap and the overall result is a narrow design.
- a deflection device is integrated into the activation device. Like some of the above measures, this contributes to a compact design and a simple construction. However, the deflection device can advantageously also be provided entirely or partially independently of the activation device.
- a deflection device can be designed in a variety of ways within the scope of the invention. According to a further development of the invention, it is provided that a deflection device has a reflection element such as, in particular, a mirror, which preferably comprises a polished metal surface and can optionally be partially transparent. However, other reflection elements such as a prism, a crystal with a fracture surface, etc. can also be used. Again, such a reflection element combines the advantages of a simple construction, a small footprint and also a high level of reliability. Alternatively or additionally, however, it is also possible within the scope of the present invention that at least one deflection device is a signal routing element such as, in particular, a Has optical waveguide. In this way, for example, a lower adjustment effort can be achieved, and the risk of soiling or misalignments of other types of deflection devices is minimized.
- a reflection element such as, in particular, a mirror, which preferably comprises a polished metal surface and can optionally be partially transparent.
- other reflection elements
- the senor has a pyrometer and / or bolometer and / or a semiconductor sensor.
- test sensor in particular
- Temperature test sensor is provided, which is preferably arranged independently of the (temperature) sensor in an area whose operating variable the sensor can detect. This results in a particularly simple check and, if necessary, also calibration of the sensor according to the invention.
- FIG. 1 shows schematically a partial perspective view of an embodiment of the device according to the invention
- FIG. 2 schematically shows a partial sectional view of the device shown in Fig. 1;
- a device 1 for coating a workpiece 2 is shown schematically in FIG. 1 in a partial perspective view.
- the device 1 is used to coat workpieces that are preferably made at least in sections of wood, wood-based materials, plastic or the like, as are widely used in the furniture and construction element industries.
- the coating material 2 can be, for example, a
- Narrow surface coating made of a wide variety of materials such as plastic, veneer, paper or metal. Alternatively or additionally, however, a broad area or any other desired surface of a workpiece 2 can also be provided with a coating material 4.
- the coating material 4 in the present embodiment has a joining means 4 ′ which is provided on the side of the coating material 4 facing the workpiece 2.
- the joining means 4 ' can be, for example, an adhesive that can be activated by means of heat, such as a hot-melt adhesive.
- the coating material 4 has an integral layer 4 'which, through activation, develops adhesive properties, such as various meltable plastics.
- the entire coating material 4 can also consist of a corresponding material, so that there is no discrete joining agent layer 4 '.
- the coating device 1 initially comprises a pressing device 10, which in the present case Embodiment has a pressure roller and is used to press the coating material 4 against a surface 2 'of the workpiece 2 to be coated.
- a pressing device 10 which in the present case Embodiment has a pressure roller and is used to press the coating material 4 against a surface 2 'of the workpiece 2 to be coated.
- the coating device 1 comprises a conveyor device 20, which in the present embodiment is designed as a conveyor device, for example in the form of a conveyor belt, conveyor belt, conveyor chain or the like.
- a conveyor device 20 instead of a continuous conveyor device for conveying the workpiece 2, a so-called stationary concept can also be used, in which the workpiece 2 is essentially stationary during the coating process and the pressing device 10 moves along the workpiece and possibly also around the workpiece becomes.
- the conveying device 20 always serving to bring about a relative movement between the workpiece 2 and the pressing device 10.
- the coating device 1 comprises an activation device 30 which, in the present embodiment, comprises a nozzle arrangement 32 for dispensing a heated fluid which is used to activate the joining means 4 ′.
- the heated fluid is supplied as volume flow V via a feed line 36 to the nozzle arrangement 32, a fluid supply and a heating device being provided upstream.
- the fluid supply can advantageously also be a pressurized fluid supply which, purely for example, supplies the fluid to the nozzle arrangement 32 with an overpressure 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.
- a nozzle arrangement instead of a nozzle arrangement, another type of outlet arrangement can be used in which the fluid is discharged to the outside through a tissue, for example.
- the coating device 1 in the present embodiment has a temperature sensor 40 for detecting a temperature of the joining means 4 ′, which can be designed, for example, as a pyrometer or bolometer or semiconductor sensor.
- the temperature sensor 40 emits a sensor signal such as a sensor beam 44 which, in the present embodiment, is directed to the joining means 4 ′ via a deflection mirror 62.
- the corresponding reflection is detected and evaluated via a sensor section 42 of the temperature sensor 40 in order to infer the temperature of the joining means 4 '.
- thermosensor As an alternative or in addition to the temperature sensor, 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 deflecting mirror 62 is a polished sheet of metal, such as V2A in particular, although other reflection elements can also be used, which may also be partially transparent.
- the coating device 1 comprises a shielding device 50 which serves to shield the sensor section 42 of the temperature sensor 40 from external influences such as, in particular, also contamination.
- the housing of the nozzle arrangement 32 acts as a shield against the environment.
- the shielding device 50 of the present embodiment also comprises a barrier fluid outlet 52, which is used to discharge barrier fluid for shielding the sensor section 42.
- the temperature sensor 40 is largely integrated into the nozzle arrangement 32 in such a way that a fluid outlet 34 of the nozzle arrangement 32, which can also be used to output heated fluid to the joining means 4 ′, serves as a barrier fluid outlet 52.
- a fluid outlet 34 of the nozzle arrangement 32 which can also be used to output heated fluid to the joining means 4 ′, serves as a barrier fluid outlet 52.
- the sensor signal 44 which is used to detect the temperature of the joining means 4 ′, extends through the barrier fluid outlet 52. Since heated fluid flows through this barrier fluid outlet 52 in any case during operation of the coating device 1, the temperature sensor 40 and in particular the sensor section 42 is effectively protected from environmental influences, contamination, etc., while at the same time a precise detection of the temperature of the bonding agent layer 4 'is made possible.
- the coating device 1 in the present embodiment comprises a test sensor 70, which can be designed, for example, as a temperature test sensor such as a temperature resistor.
- the temperature test sensor 70 can, for example, be arranged on a machine part of the coating device 1 in an area whose temperature the temperature sensor 40 can in principle detect, for example when no coating material 4 is currently inserted into the coating device 1. In this state - without an inserted coating material 4 - a checking or calibration process can then be carried out by means of of the temperature test sensor 70 as well as by means of the temperature sensor 40, the temperature of the relevant machine area is measured and compared with one another. This allows the reliability and precision of the temperature measurement according to the invention to be increased further.
- the operation of the coating device 1 according to the invention takes place, for example, as follows. While a workpiece 2 to be coated is conveyed by the conveying device 20 in the direction indicated by an arrow in FIG. 1, the joining layer 4 'of the coating material 4 that is also supplied is activated by the activating device 30 by hot pressure fluid. Simultaneously with this, the temperature actually reached by the joining means 4 ′ is recorded using the temperature sensor 40 and then compared with a setpoint temperature or a setpoint temperature range of the joining means 4. If the recorded temperature deviates from the temperature of the joining means 4 ′ or lies outside the target range, various operating parameters can be adapted in order to bring the recorded temperature closer to the target temperature. In addition to an adaptation of the temperature, the pressure or the volume flow of the fluid output by the activation device 30, the throughput speed can also be changed, for example, since this also varies the energy input.
- an activation device in the form of a nozzle arrangement for fluid was described in the embodiments disclosed above, other activation devices such as lasers, microwaves, ultrasound, infrared, plasma or the like can also be used within the scope of the invention. With these activation devices, too, a temperature sensor shielded by a shielding device can advantageously be used in order to optimize the joining process advantageously and, above all, reliably and permanently.
- the embodiment of the invention shown in FIG. 3 largely corresponds to the embodiment described above and shown in FIG. 2, so that only the differences between the two embodiments will be discussed below.
- a separate, essentially L-shaped channel 54 is provided in the nozzle arrangement 32, which is used to accommodate the temperature sensor 40 and the deflection device 60.
- the embodiment shown in FIG. 3 comprises a barrier fluid outlet 52 which is provided independently of the fluid outlets 34 of the nozzle arrangement 10.
- the nozzle arrangement 32 has a fluid chamber 36 ′, which is supplied with the pressure fluid via the supply line 36 and distributes it to the fluid outlets 34.
- This fluid chamber 36 ′ is connected to the L-shaped chamber 54 via a passage 38 in such a way that a barrier fluid flow is established into the L-shaped chamber 54, which flow leaves the L-shaped chamber 54 via the barrier fluid outlet 52.
- the temperature sensor 40 detects the temperature of the joining means 4 ′ through this barrier fluid outlet 52, whereby it is again effectively and permanently protected from external influences such as, in particular, contamination.
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 |
|---|---|---|---|
| DE102019133934.0A DE102019133934A1 (de) | 2019-12-11 | 2019-12-11 | Vorrichtung und Verfahren zum Beschichten eines Werkstücks |
| PCT/EP2020/085301 WO2021116179A1 (de) | 2019-12-11 | 2020-12-09 | Vorrichtung und verfahren zum beschichten eines werkstücks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4072801A1 true EP4072801A1 (de) | 2022-10-19 |
Family
ID=73834513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20824193.5A Pending EP4072801A1 (de) | 2019-12-11 | 2020-12-09 | Vorrichtung und verfahren zum beschichten eines werkstücks |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12466102B2 (de) |
| EP (1) | EP4072801A1 (de) |
| CN (1) | CN114761190B (de) |
| DE (1) | DE102019133934A1 (de) |
| WO (1) | WO2021116179A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017208422A1 (de) * | 2017-05-18 | 2018-11-22 | Homag Gmbh | Bearbeitungsvorrichtung |
| DE102019135438A1 (de) * | 2019-12-20 | 2021-07-08 | Homag Gmbh | Kappeinrichtung, Beschichtungseinrichtung sowie Verfahren zum Ablängen eines Schmalflächenbeschichtungsmaterials |
| DE102020131506A1 (de) | 2020-11-27 | 2022-06-02 | Homag Gmbh | Vorrichtung und Verfahren zum Beschichten eines Werkstücks |
| DE102022119457A1 (de) | 2022-08-03 | 2024-02-08 | Homag Gmbh | Vorrichtung zum Beschichten eines Werkstücks |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20203827U1 (de) * | 2001-03-19 | 2002-07-25 | Paul Ott Gmbh, Lambach | Leimbecken für Kantenleimmaschinen sowie Vorratsbehälter hierfür |
| EP2347873B1 (de) * | 2005-11-23 | 2022-03-23 | HOMAG GmbH | Verfahren und Vorrichtung zur Beschichtung von Bauteilen |
| DE202008015878U1 (de) | 2008-12-01 | 2010-04-15 | Homag Holzbearbeitungssysteme Ag | Vorrichtung zum Beschichten von Werkstücken |
| EP2345518B1 (de) * | 2010-01-18 | 2014-04-23 | Homag Holzbearbeitungssysteme AG | Vorrichtung und Verfahren zum Beschichten von Werkstücken |
| DE102012213796B4 (de) * | 2012-08-03 | 2021-03-25 | Brandt Kantentechnik Gmbh | Verfahren und Vorrichtung zum Beschichten von Werkstücken |
| DE102013208127A1 (de) * | 2013-05-03 | 2014-11-06 | Homag Holzbearbeitungssysteme Gmbh | Heißgaserzeugungseinrichtung |
| 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 |
| DE102016209107A1 (de) * | 2016-05-25 | 2017-11-30 | Homag Gmbh | Sperrfluidvorrichtung für eine Bearbeitungsvorrichtung, Bearbeitungsvorrichtung und Verfahren zur Erzeugung eines Sperrfluids |
| DE102016221538A1 (de) * | 2016-11-03 | 2018-05-03 | Homag Gmbh | Vorrichtung zur Erwärmung einer Funktionsschicht |
| 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 |
| CN111650713B (zh) * | 2020-07-16 | 2024-12-10 | 莱特巴斯光学仪器(镇江)有限公司 | 一种红外测温用镜头 |
| CN113932924A (zh) * | 2021-11-20 | 2022-01-14 | 上海致密科技有限公司 | 一种多透镜低噪声红外测温传感器装置 |
-
2019
- 2019-12-11 DE DE102019133934.0A patent/DE102019133934A1/de active Pending
-
2020
- 2020-12-09 EP EP20824193.5A patent/EP4072801A1/de active Pending
- 2020-12-09 CN CN202080085036.8A patent/CN114761190B/zh active Active
- 2020-12-09 US US17/784,625 patent/US12466102B2/en active Active
- 2020-12-09 WO PCT/EP2020/085301 patent/WO2021116179A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019133934A1 (de) | 2021-06-17 |
| WO2021116179A1 (de) | 2021-06-17 |
| US20230007828A1 (en) | 2023-01-12 |
| CN114761190B (zh) | 2024-03-26 |
| CN114761190A (zh) | 2022-07-15 |
| US12466102B2 (en) | 2025-11-11 |
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