EP3976330A1 - Verfahren und vorrichtung zum beschichten von werkstücken - Google Patents
Verfahren und vorrichtung zum beschichten von werkstückenInfo
- Publication number
- EP3976330A1 EP3976330A1 EP20728478.7A EP20728478A EP3976330A1 EP 3976330 A1 EP3976330 A1 EP 3976330A1 EP 20728478 A EP20728478 A EP 20728478A EP 3976330 A1 EP3976330 A1 EP 3976330A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- functional layer
- water
- coating material
- air
- 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
Definitions
- the invention relates to a method with a
- Device for coating workpieces which are preferably at least partially made of wood, wood-based materials,
- Plastic or the like are made with a
- connection is the activation of the functional layer with the help of hot air.
- Such technologies are disclosed, for example, in EP 2799793 B1 and in EP 2902160 B1.
- Disintegration processes occur on the functional layer or the coating material, up to and including the risk of fire.
- the invention is based on the idea of working with a comparatively simple energy source for activating a functional layer that can be made adhesive and using it so effectively that today's
- the functional layer is at least partially activated by gassing with a heated gas, the heated gas being enriched with water in an enrichment step, such as air enriched with water.
- the physical background here is, on the one hand, that the specific heat capacity of gases such as air with a higher water content is greater than the specific heat capacity of air with a lower water content.
- the coefficient of thermal conductivity of gases such as air with a higher water content is also greater than the coefficient of thermal conductivity of air with a lower one
- the same thermal energy can be transferred to the edge material functional layer with less temperature.
- a method according to the invention for activating a functional layer of a coating material has the following steps. Deploy a through
- Adhesive energy input feasible functional layer supply of a coating material to one to be coated
- the heated gas is preferred to the functional layer via at least one outlet opening
- Functional layer can be heated.
- the gas in the region of the at least one outlet opening has a temperature of at least 150 ° C., preferably at least 250 ° C. and / or an absolute temperature
- the functional layer has means for increasing the thermal conductivity, such as in particular low-melting polyolefins and / or metal particles.
- Coating material can be faster and thus
- the volume flow of the gas can be regulated.
- the water content in the gas can be regulated.
- the possible rate of heat transfer can be determined via the water content of the gas.
- the water content of the gas is also available as a control variable for the energy input into the functional layer of the
- the functional layer is essentially free of absorbers for laser light or other radiation sources.
- Such absorbers are relatively cost-intensive; omitting them can thus provide a particularly cost-effective method.
- the method at least partially recuperates the gas supplied to the coating material and at least indirectly, in particular via a heat exchanger, to heat the gas supplied
- Coating material ready comprising: at least one outlet opening for supplying a heated gas to the functional layer, and at least one gas source for
- Providing the heated gas to the at least one outlet opening, wherein the gas source is configured in this way is to provide heated gas that is enriched with water and is preferably air enriched with water.
- the gas source preferably has an evaporator which is designed to convert liquid water into a vaporous state and thus to enrich the gas in the gas source with it.
- a unit for controlling the is also preferred
- Volume flow arranged in or on the device.
- a unit for regulating the volume flow can be used to display a precise energy input into the functional layer of the coating material.
- an ice spray nozzle for adding water is integrated.
- An injection nozzle for mixing water into the gas can be used to humidify the gas.
- a mixing valve for regulating the air and water proportions is preferably contained in the device.
- a heat exchanger for recovering thermal energy from the used gas into the supplied gas or the supplied water is furthermore preferably contained in the device.
- Heat exchangers can help to reduce waste heat and thus achieve a more favorable energy balance.
- There the air / water medium is taken up again in the area of the heating point of the edging material, i.e. in the area where the primary use of the air / water medium also took place.
- the resumed air / water medium can furthermore be treated by means of a condensate separator (not shown) so that the air is dried.
- a higher-level control is preferably used, which sets optimal thermal energy at the gas outlet opening.
- the operating point can be made by means of at least one sensor, which in particular is a humidity sensor,
- Temperature sensor, pressure sensor and / or a volume flow sensor is. This at least one sensor is arranged in particular on the gas outlet opening (20), on the gas feed or on the water feed.
- the measured temperature which is used for the regulation, is also a temperature which corresponds to a setpoint value of the process.
- the device is further preferably designed
- Fig. 1 shows schematically a plan view of a
- Fig. 2 shows schematically a detail from Fig. 1;
- FIG. 3 schematically shows a further detail from FIG. 1.
- a device 10 for coating workpieces 2 according to a preferred embodiment of the present invention is shown schematically in a plan view in FIG. 1.
- the device 10 according to the invention can be used for coating a wide variety of workpieces, it is preferably used for coating workpieces that are at least partially made of wood, wood-based materials, plastic or the like, as are common in the furniture, kitchen and construction elements industries Use. Any surfaces such as
- Narrow or wide surfaces can be coated.
- the coating material 4 can also be a wide variety of materials, preferably one provided with a functional layer 4 '
- Coating material is used.
- Coating material 4 for example in the sense of a co-extruded or even completely monolytic
- the functional layer 4 ' is already provided on the surface of the workpiece to be coated and / or also separately in the area between
- Coating material 4 and surface to be coated of the workpiece 2 is supplied.
- the functional layer 4 ′ develops adhesive properties through the introduction of energy (such as, for example, heating), so that the energy (such as, for example, heating), so that the energy (such as, for example, heating).
- Coating material can be joined to the workpiece.
- the composite effect can also be wholly or partially based on other mechanisms.
- the functional layer in the present embodiment can have means for increasing the
- the functional layer 4 ' is essentially free of absorbers for laser light or other radiation sources.
- the device 10 further comprises a pressing device 14 for pressing the coating material 4 against one
- the feed device 12 for feeding the coating material 4 is thermally insulated at least in sections in the present embodiment.
- the device 10 further comprises a conveying device 16 for bringing about a conveying device 16
- Continuous conveyor for example in the form of a conveyor chain
- device according to the invention also as
- Stationary machine can be designed in which the
- a wide variety of facilities are used, such as conveyor belts, portals, but also robots and much more.
- Activation unit 20 ' is provided, which in the present embodiment has a plurality of outlet openings 20 for supplying a heated gas (or gas mixture such as air) 6 to the respective functional layer 4 '.
- a heated gas or gas mixture such as air
- Coating material 4 or the workpiece 2 are the same
- Outlet openings 20 correspondingly directed towards the functional layer 4 '.
- the outlet openings 20 are spaced at most 10 mm, preferably at most 4 mm, for example approx. 2 mm, from the respective functional layer 4 '. It is also possible that the activation unit 20 ', as indicated in FIG. 1, in several directions
- the outlet openings 20 of the activation unit 20 ′ are connected to a gas source 22.
- the gas source 22 provides heated gas 6 to the respective
- Outlet openings 20 ready that it is enriched with water and preferably air enriched with water. It has been found that it is particularly compact and inexpensive to use (purified) ambient air and to enrich it with water in the sense of a humidification process.
- an evaporator can be provided, for example a steam boiler, thin-film evaporator, falling film evaporator,
- Boiler evaporator coaxial evaporator, natural circulation evaporator or forced circulation evaporator.
- water can be injected into the (hot) air with an injection system. This depends on the technical
- the water content of the air can be raised to a higher level than the ambient air.
- the amount of saturation of water vapor in air increases as the temperature of the air rises. It is therefore technically sensible to heat the air in the gas source in a first step, for example by means of an electric heater.
- the air heated in this way has the same water load (absolute
- Humidity has a lower relative humidity, so that in a next step the relative humidity can be increased.
- Temperatures of 150 ° C. and an absolute humidity of at least 4 g water / kg air and preferably 250 ° C. and 14 g water / kg air have proven to be technically sensible.
- FIG. 2. 2 shows that side surface of the
- Functional layer 4 ' is facing.
- Activation unit 20 ′ in the present embodiment has a plurality of outlet openings 20, wherein the gas in the region of at least two outlet openings 20 can have a temperature that is different from one another. That's the way it is
- escaping gas in the direction of a relative movement between outlet openings 20 and functional layer 4 'to be activated i.e. in the present case in the direction of passage (from left to right in Fig. 2), increases.
- at least individual nozzles can have means for adapting to the geometry of the functional layer to be activated.
- Humidity sensors, temperature sensors, pressure sensors and / or volume flow sensors can still be connected to the
- Outlet opening 20 be arranged on another part of the gas supply or on the water supply. It can thus be recorded what temperature the gas or water has, and this information can still be used to control and / or regulate how far in
- Coating material is heated.
- Such a regulation can also take place in that the volume flow of is adapted to different supplies of gas and / or water, for example if they have a different temperature, which in turn can also be detected by temperature sensors.
- Database / cloud This can be done by means of a data carrier signal that connects device 10 to the external database / cloud, for example via Ethernet, WLAN, Bluetooth or 5G networks. This enables the data to be collected centrally, which enables further analysis of the data and thus improved operating parameters
- Outlet openings 20 of the device 10 means for the formation of a turbulent or also laminar flow when the heated gas 6 emerges.
- this can be achieved, for example, in that the respective outlet opening 20 is designed as a nozzle with a cross-section that is at least partially variable in the flow direction.
- Heat storage capacity can be provided.
- Gas source 22 is shown schematically in FIG. 3. The
- gas source 22 has a heat exchanger section 24 which is set up
- the overall system is coordinated in such a way that the gas in the region of the at least one outlet opening 20 has a temperature of at least 300 ° C., preferably at least 350 ° C.
- the heat exchanger section 24 can, for example, have at least one, in particular porous and / or Hauptwerk-porous and / or provided with through-openings heat exchanger element
- the heat exchanger element can consist at least in sections of a material which is selected from stainless sintered material, porous ceramics, metal foam, in particular aluminum foam, and combinations thereof.
- An air / air or air / water heat exchanger can also be used to recover the heat, in which the heat energy of the used gas is applied to the new gas or the
- evaporating / atomizing water can be transferred.
- the device 10 according to the invention can furthermore have a second gas source which is set up upstream of the at least one
- Outlet opening (on the far right in FIG. 3) to feed gas in order to increase the pressure of the gas emerging at the at least one outlet opening.
- the device 10 also comprises a discharge device 32, such as a collecting funnel.
- a discharge device 32 such as a collecting funnel.
- a heat exchanger 30 can be provided downstream of the discharge device 32, by means of which the waste heat of the gas fed to the functional layer 4 'is collected and
- coated workpiece 2 is by means of the conveyor 16 conveyed in one conveying direction (from left to right in FIG. 1).
- a coating material 4 is supplied by means of the supply device. The one on the
- Coating material and / or workpiece (or separately) provided functional layer is produced by means of the heated gas 6 exiting from outlet openings 20
- the coating material 4 is joined to the workpiece 2 by means of the activated functional layer 4 ′.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019114105.2A DE102019114105A1 (de) | 2019-05-27 | 2019-05-27 | Verfahren und Vorrichtung zum Beschichten von Werkstücken |
| PCT/EP2020/064531 WO2020239741A1 (de) | 2019-05-27 | 2020-05-26 | Verfahren und vorrichtung zum beschichten von werkstücken |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3976330A1 true EP3976330A1 (de) | 2022-04-06 |
| EP3976330B1 EP3976330B1 (de) | 2024-10-23 |
Family
ID=70857187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20728478.7A Active EP3976330B1 (de) | 2019-05-27 | 2020-05-26 | Verfahren und vorrichtung zum beschichten von werkstücken |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3976330B1 (de) |
| DE (1) | DE102019114105A1 (de) |
| WO (1) | WO2020239741A1 (de) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1270541B (it) * | 1993-05-18 | 1997-05-06 | Manea Srl Off Mec Flli | Metodo di incollaggio in linea di bordi ai fianchi di pannelli in una macchina bordatrice |
| EP2347873B1 (de) * | 2005-11-23 | 2022-03-23 | HOMAG GmbH | Verfahren und Vorrichtung zur Beschichtung von Bauteilen |
| DE202008009137U1 (de) * | 2008-07-07 | 2008-09-25 | Klebchemie M.G. Becker Gmbh & Co. Kg | Profilierter Gegenstand mit Deckmaterial und Versiegelungsschicht |
| CN102159378B (zh) * | 2008-07-21 | 2013-11-13 | 卡尔瓦特尼曼有限两合公司 | 在特别是板状工件的窄面施用边缘条获得的工件及其方法 |
| 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 |
| DE102013012644A1 (de) * | 2013-07-30 | 2015-02-05 | Ima Klessmann Gmbh Holzbearbeitungssysteme | Beschichtungsvorrichtung sowie Aktivierungsmodul für eine Beschichtungsvorrichtung |
| EP2902161B1 (de) * | 2014-02-04 | 2017-08-23 | BIESSE S.p.A. | Maschine zur kantenbearbeitung von holzpaneelen oder dergleichen |
| EP2902160B1 (de) * | 2014-02-04 | 2018-05-23 | BIESSE S.p.A. | Maschine zur kantenbearbeitung von holzpaneelen oder dergleichen |
| DE102018127617A1 (de) * | 2018-11-06 | 2020-05-07 | Homag Gmbh | Verfahren und Vorrichtung zum Beschichten eines Werkstücks |
-
2019
- 2019-05-27 DE DE102019114105.2A patent/DE102019114105A1/de active Pending
-
2020
- 2020-05-26 WO PCT/EP2020/064531 patent/WO2020239741A1/de not_active Ceased
- 2020-05-26 EP EP20728478.7A patent/EP3976330B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019114105A1 (de) | 2020-12-03 |
| EP3976330B1 (de) | 2024-10-23 |
| WO2020239741A1 (de) | 2020-12-03 |
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