EP4005758A1 - Dispositif et procédé de revêtement d'une pièce - Google Patents

Dispositif et procédé de revêtement d'une pièce Download PDF

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Publication number
EP4005758A1
EP4005758A1 EP21209859.4A EP21209859A EP4005758A1 EP 4005758 A1 EP4005758 A1 EP 4005758A1 EP 21209859 A EP21209859 A EP 21209859A EP 4005758 A1 EP4005758 A1 EP 4005758A1
Authority
EP
European Patent Office
Prior art keywords
workpiece
fluid
coating material
fluid flow
coating
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.)
Withdrawn
Application number
EP21209859.4A
Other languages
German (de)
English (en)
Inventor
Johannes Schmid
Reiner Götz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Homag GmbH
Original Assignee
Homag GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Homag GmbH filed Critical Homag GmbH
Publication of EP4005758A1 publication Critical patent/EP4005758A1/fr
Withdrawn legal-status Critical Current

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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
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring

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 agent or adhesive, which is applied to the workpiece or to the coating material, for example in the form of hot-melt adhesive.
  • the joining agent or adhesive in advance on the coating material or also the workpiece or to form it integrally with them.
  • the joining agent is activated or kept activated by means of a suitable device during the course of the coating process.
  • Devices for coating a workpiece with an activation device for activating the joining agent which is used to join the coating material to the surface of the workpiece to be coated, are known from DE 10 2017 122 701 A1 and the DE 10 2019 133 934.0 known.
  • an air flow which is generated by means of an external compressed air system, is heated in the coating device or in the activation device and used to activate the joining agent.
  • the invention is therefore based on the object of providing a device and a method for coating a workpiece which ensures a constant activation process of the workpiece and/or the coating material with a constant activation result.
  • the invention is based in particular on the finding that a constant activation process of the workpiece and/or the coating material with a constant activation result is only guaranteed if both the generation of the air flow and the heating of it are not disturbed by external influences.
  • the invention provides a device for coating a workpiece, which preferably consists at least in sections of wood, wood-based materials, plastic or the like, comprising a pressing device for pressing a coating material onto a surface of the workpiece to be coated, a conveyor device for bringing about a relative movement between the workpiece and the pressing device, an activation device for activating the workpiece and/or the coating material and/or a functional layer, characterized in that the activation device has a fluid energy machine for generating a fluid flow, which is preferably in a pressure range of 0 to 10 bar, more preferably works in a pressure range of 2 to 6 bar, and a temperature control device for heating the fluid flow, which is coupled to the fluid energy machine in such a way that a fluid, in particular Lu ft, and a heated fluid stream can be discharged at a fluid outlet, which can be directed towards a workpiece and/or workpiece coating material to be activated.
  • a fluid energy machine for generating a fluid flow
  • a fluid energy machine for
  • the invention thus ensures that a fluid flow is both generated directly in the activation device and heated and then immediately directed onto the workpiece to be activated and/or the workpiece coating material to be activated.
  • This has the advantage that the device for coating workpieces is completely independent of an external fluid or compressed air system and a corresponding fluid or compressed air network. This offers the operator of the device more flexibility when setting up the system and makes moreover, a costly peripheral supply is superfluous. This in turn saves additional components during installation and enables space-saving installation.
  • the activation device is already fully integrated into the device for coating workpieces during assembly in the factory and makes a complex connection to external systems, such as a fluid or compressed air system at the installation site, unnecessary.
  • the device for coating is preferably set up in such a way that it has a control unit which is set up to control and/or regulate the temperature control device and/or the fluid energy machine in such a way that the fluid flow has definable parameters, in particular volume flow, pressure and/or temperature , meets the workpiece to be activated and/or workpiece coating material and/or the functional layer to be activated and/or transfers a defined amount of energy.
  • This makes it possible to flexibly control the activation process of a workpiece and/or coating material and/or functional layer and to adapt it to different workpieces or coating materials. This has the advantage that different workpiece and coating materials can be activated and processed.
  • the activation device can switch off flexibly when it is idle or during production breaks. This reduces energy consumption and saves costs.
  • the device is designed in such a way that the control unit regulates a feed of the workpiece and/or the coating material in such a way that a defined amount of energy is applied to the workpiece and/or the Coating material is transferred.
  • the control unit regulates a feed of the workpiece and/or the coating material in such a way that a defined amount of energy is applied to the workpiece and/or the Coating material is transferred.
  • the fluid energy machine has an electric motor, in particular a speed-controllable electric motor, which sets blading, in particular a double turbine wheel, in motion to generate the fluid flow.
  • an electric motor in particular a speed-controllable electric motor, which sets blading, in particular a double turbine wheel, in motion to generate the fluid flow.
  • the fluid flow is generated flexibly, quickly and as needed by means of the electric motor. This is advantageous in that only the amount of energy that is actually required is transferred via the set fluid flow to the workpiece and/or coating material to be activated.
  • the device is designed in such a way that the temperature control device has an energy source, in particular a controllable one, which heats the fluid flow by means of resistance heating cartridges, lasers, microwaves, infrared, plasma and/or ultrasound.
  • the amount of energy in the fluid flow is set flexibly, quickly and as needed by means of the appropriate temperature control device. This has the advantage that only the amount of energy that is actually required is transferred via the set fluid flow to the workpiece to be activated and/or the coating material.
  • a collecting device in particular a funnel-shaped collecting hood, is arranged in a fluid flow after the fluid outlet in such a way that the fluid flow of the fluid outlet directed towards the workpiece and/or workpiece coating material to be activated lies in the collecting area of the collecting device. This ensures that the heated fluid stream does not escape into the environment.
  • the advantage here lies in the fact that the environment is not heated up unnecessarily and the fluid flow is collected or can be diverted after activation for further use.
  • the device is designed in such a way that the treated fluid flow meets the workpiece and/or the coating material in an interior area of the collecting device. In this way, the parts of the fluid flow that are deflected in different spatial directions when they hit the workpiece and/or the coating material are also guided into the collecting area of the collecting device and caught by it.
  • a fluid flow discharged through the collecting device is returned to the fluid inlet by means of a fluid line device.
  • a fluid line device This makes it possible for that part of the energy quantity of the fluid flow which is not transferred to the workpiece and/or the coating material during activation to be fed back to the fluid energy machine or to the temperature control device.
  • the temperature control device only has to use the amount of energy that is withdrawn from the fluid flow during the activation process. As a result, the environment is not heated unnecessarily and energy costs are reduced.
  • the device is designed in such a way that the fluid flow supplied at the fluid inlet flows out of the flow through the collecting device recirculated fluid stream and one and/or more additional external fluid streams.
  • a filter device for processing the fluid is connected, in particular for depleting solid particles. This ensures that no foreign particles and/or fluids originating from the environment and/or from the workpiece and/or the coating material get into the fluid energy machine and the temperature control device. This has the advantage that the activation device is protected from damage. The workpiece and/or the coating material itself are also protected from unwanted components in this way.
  • a further preferred embodiment of the device is characterized in that a deflection device, in particular an adjustable deflection device, in particular a deflection nozzle, is provided at the fluid outlet for deflecting the treated fluid flow in all different spatial directions. This allows the fluid stream to impinge on the workpiece and/or coating material at different angles.
  • exit height of the fluid stream can be variably adjusted by means of the deflection device. In this way, a corresponding length on the workpiece and/or coating material to be activated.
  • control unit controls and/or regulates the deflection device for adjusting the outlet height and/or the spatial direction of the treated fluid flow. This makes it possible to variably adjust the outlet height and/or the spatial direction of the treated fluid flow during the coating process to different workpieces and/or coating materials and/or different workpiece and/or coating material geometries. In this way, a flexible and efficient activation or coating process in the device is possible.
  • the deflection device is arranged in front of the pressing device between the workpiece to be coated and the coating material. This enables a space-saving arrangement, with the activation of the workpiece and/or the coating material only taking place shortly before the pressing device.
  • This has the advantage that the residence time of the activated workpiece and/or the coating material up to the pressing device is as short as possible, so that the workpiece and/or the coating material arrives in the pressing device optimally activated.
  • this does not rule out the possibility that the dwell time of the activated workpiece and/or the coating material can also be made as long as possible, if necessary, by arranging the deflection device at a correspondingly large distance in front of the pressing device between the workpiece to be coated and the coating material.
  • a method according to the invention for coating a workpiece with a coating device has the following steps. Conveying the workpiece relative to the activation device and the pressing device, generating and heating of the fluid flow in the activation device depending on the geometry and/or material properties of the workpiece and/or the coating material and/or the functional layer and/or the relative movement of the workpiece, activating the workpiece and/or the coating material and /or the functional layer with the fluid flow generated in the activation device, pressing the activated coating material onto the surface of the workpiece to be coated and/or the coating material onto the surface of the activated workpiece to be coated.
  • a device 17 for coating a workpiece 11 is in 1 shown in a schematic plan view.
  • the device 17 is used for coating workpieces, which are preferably at least partially made of wood, wood-based materials, plastic or the like, such as are widely used in the furniture and component industry.
  • the coating material 1 can be, for example, a narrow surface coating (edge) made from a wide variety of materials such as plastic, veneer, paper or even metal. Alternatively or additionally, however, a wide area or any other desired surface of a workpiece 11 can also be provided with a coating material 1 .
  • the coating material 1 has a functional layer 2 which is provided on the side of the coating material 1 facing the workpiece 11 .
  • the functional layer 2 can be, for example, an adhesive that can be activated by heat, such as a hot-melt adhesive.
  • the coating material 1 has an integral layer 2, which develops adhesive properties through activation, such as various plastics that can be melted.
  • the entire coating material 1 can also consist of a corresponding material, so that there is no discrete functional layer 2 .
  • the functional layer 2 to be activated is located on the workpiece 11 itself and/or is integrally connected to it.
  • the functional layer can also be supplied and activated separately.
  • the heat or thermal energy used to activate the functional layer is transported in particular by means of a fluid flow.
  • this is forced convection, with the particle transport being forced by external influences, for example by a fan or a pump.
  • the heated (pressure) fluid can be hot air.
  • the fluid it is also possible for the fluid to contain other gases and/or possibly also liquids or liquid droplets.
  • the device initially comprises a pressing device 12 which, in the present embodiment, has a pressure roller and is used to press the coating material 1 onto a surface of the workpiece 1 to be coated.
  • the coating device 16 comprises a conveyor device, for example in the form of a conveyor belt, conveyor belt, conveyor chain or the like, which is 1 however, is not shown.
  • the coating device 17 comprises an activation device 15 which, in the present embodiment, emits a heated fluid which serves to activate the functional layer 2 .
  • 1 shows a plan view of the deflection device 4 and the collecting device of the activation device 15, with the deflection device 4 being arranged in particular between the workpiece 11 and the coating material 1 in such a way that it is directed in a wedge shape in the direction of the pressing device 12 and releases the heated fluid in the direction of the coating material 1.
  • the feed direction of the workpiece 11 and the feed direction of the coating material 1 form an acute angle, with the corresponding apex of the angle being a point between the pressure roller 12 and the workpiece 11 is at which the coating material 1 is pressed onto the workpiece 11 .
  • the activation device 15 includes a fluid energy machine 6, which generates a fluid flow and preferably works in a pressure range of 0 to 10 bar, more preferably in a pressure range of 2 to 6 bar. In the present embodiment, this is designed in particular with a double turbine wheel, which is driven by means of a variable-speed electric motor. Three-bladed or multi-bladed turbine wheels are also conceivable. In addition, for example, electric motors in combination with a disc rotor, compressor wheel or another turbine wheel or the like are also possible. A reciprocating compressor can also be used to create a fluid flow. It is also conceivable that the fluid energy machine itself or its individual components are designed, for example, integrally with the coating device and/or are arranged below it.
  • a fluid inlet is provided on the fluid energy machine 6, at which, for example, fresh air 10 is supplied or sucked in.
  • a supply of other gases and/or liquids in addition to or instead of fresh air 10 is also conceivable. In this way, a fluid flow with a defined composition can be generated.
  • a filter device for processing the fluid is connected between the fluid inlet and the fluid energy machine 6, for example for depleting it Solid particles and/or liquids, but not in 2 is shown.
  • the fluid energy machine 6 for example for depleting it Solid particles and/or liquids, but not in 2 is shown.
  • universal, coalescence, dust, activated carbon and/or ultra-fine filters can be used here.
  • the fluid energy machine 6 is coupled to a temperature control device 5 in such a way that the fluid flow generated is conducted directly into the temperature control device 5 .
  • the fluid flow is in particular heated, in other words thermal energy is transferred to the particles of the fluid flow.
  • thermal energy is transferred to the particles of the fluid flow.
  • the temperature control device 5 is not limited to supplying heat to the fluid flow, but can also be used to extract heat from the fluid flow. Rather, the temperature control device 5 serves to adjust the thermal energy of the fluid flow in a defined manner.
  • the activation device 15 has an in particular adjustable deflection device 4, which can be designed, for example, as a deflection nozzle.
  • the deflection device 4, and in particular the deflection nozzle, is designed in such a way that an exit height H of the fluid flow can be adjusted.
  • the exit height H is defined as the spatial expansion in one direction, measured in one dimension.
  • the spatial extent of a workpiece 11 to be activated and/or of the corresponding coating material 1 also has a definable linear dimension in a specific spatial direction, so that the outlet height H of the fluid flow can be adapted to that.
  • the expansion of the fluid flow can correspond to a distance between two points in space or on the workpiece 11 to be activated and/or be variably adapted to the corresponding coating material 1.
  • the exit height H of the fluid flow is defined in particular as a length and/or width of the coating material 1 or the functional layer 2 .
  • the activation device 15 includes a collecting device 14 which is, for example, hood-shaped. According to figure 2 the coating material 1 with the functional layer 2 is guided along in an interior area of the collecting device 14 . In this case, the deflection device 4 is aligned in such a way that the heated fluid flow impinges on the coating material 1 with the functional layer 2 via a corresponding inlet opening of the collecting device 14 .
  • the collecting device 14 also includes a discharge opening, to which a fluid line device 8 is coupled in order to discharge the fluid collected in the collecting device 14 and direct it to the fluid inlet on the fluid energy machine 6 .
  • the collecting device 14 can in particular be designed as a suction device which actively discharges the heated fluid flow.
  • the suction effect can result, for example, from a negative pressure generated by the fluid energy machine 6 .
  • a suction effect can also be achieved by designing the collecting device 14 as a Venturi nozzle.
  • FIG. 3 shows the schematic structure of the activation device 15 1 according to a second embodiment.
  • the fluid inlet is provided on the temperature control device 5 .
  • the fluid energy machine 6 is coupled to the temperature control device 5 in such a way that the external Fluid 10 and/or the fluid returned via the fluid line device 8 is first sucked in and temperature-controlled via a fluid inlet on the temperature control device 5 and only then transported via the fluid energy machine 6 to the fluid outlet on the deflection device 4.
  • the filter device (not shown in 3 ) Switched in particular between the fluid inlet and the temperature control device 5.
  • the device 16 for coating a workpiece comprises a control unit 17.
  • This controls in particular the conveying device, the deflection device 4, the collecting device 14, the temperature control device 5 and/or the fluid energy machine 6.
  • the control unit 17 and a regulator 13 it is possible to regulate various fluid flow parameters such as volume flow, pressure and/or temperature in order to transport a constant amount of energy via the fluid flow.
  • the controller 13 regulates the speed of the electric motor 7 of the fluid energy machine in order to set a defined fluid volume flow. It is also conceivable that the controller 13 controls the energy source, for example, so that a defined amount of energy is transferred to the fluid flow.
  • sensors are provided in the coating device 16 in order to detect, for example, the volumetric flow, pressure and/or temperature of the fluid or the fluid flow. These can be provided, for example, at the fluid outlet of the deflection device 4 and/or in the area of the collecting device 14 .
  • a sensor detects the activation state of the workpiece 11 and/or the coating material 1 or the functional layer 2 and regulates the amount of energy of the fluid flow on this basis.
  • the temperature of the workpiece 11 to be activated and/or the coating material 1 can be determined.
  • the amount of energy to be transferred to the workpiece 11 and/or the coating material 1 can be set by controlling and regulating the feed of the workpiece 11 and/or the coating material 1 . This is possible, for example, by controlling and regulating the conveyor.
  • control unit 17 controls the deflection device 4 in particular, so that the outlet height H and/or the spatial direction of the heated fluid flow is adapted to the geometry and/or the material composition of different workpieces 11 and/or coating materials 1 and/or functional layers 2 in the throughput .
  • control and regulation of the individual components of the coating device 16 and/or the various parameters of the fluid (flow) can take place individually and/or in combination in the network in the coating process.

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  • 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)
EP21209859.4A 2020-11-27 2021-11-23 Dispositif et procédé de revêtement d'une pièce Withdrawn EP4005758A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020131506.6A DE102020131506A1 (de) 2020-11-27 2020-11-27 Vorrichtung und Verfahren zum Beschichten eines Werkstücks

Publications (1)

Publication Number Publication Date
EP4005758A1 true EP4005758A1 (fr) 2022-06-01

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EP21209859.4A Withdrawn EP4005758A1 (fr) 2020-11-27 2021-11-23 Dispositif et procédé de revêtement d'une pièce

Country Status (3)

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EP (1) EP4005758A1 (fr)
CN (1) CN114559504A (fr)
DE (1) DE102020131506A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023121474A1 (de) 2023-08-10 2025-02-13 Christof Schulte-Göbel Umluftdüse
DE202024100948U1 (de) * 2024-02-28 2025-05-30 Ima Schelling Deutschland Gmbh Vorrichtung zum Anbringen eines Kantenbandes

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013012644A1 (de) * 2013-07-30 2015-02-05 Ima Klessmann Gmbh Holzbearbeitungssysteme Beschichtungsvorrichtung sowie Aktivierungsmodul für eine Beschichtungsvorrichtung
EP2902160A1 (fr) * 2014-02-04 2015-08-05 BIESSE S.p.A. Macchina per la bordatura di pannelli di legno o simili
DE102017122701A1 (de) 2017-09-29 2019-04-04 Homag Gmbh Beschichtungsvorrichtung sowie Beschichtungsverfahren
EP3611001A1 (fr) * 2012-08-03 2020-02-19 HOMAG GmbH Dispositif et procédé de revêtement de pièces à usiner
DE102019113270A1 (de) * 2019-05-20 2020-11-26 Homag Gmbh Heißgaseinrichtung zum Bereitstellen von Heißgas sowie Beschichtungsvorrichtung und Verfahren zum Beschichten von Werkstücken
DE102019133934A1 (de) 2019-12-11 2021-06-17 Homag Gmbh Vorrichtung und Verfahren zum Beschichten eines Werkstücks

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10342723B4 (de) 2003-09-16 2005-12-15 Delle Vedove Maschinenbau Gmbh Wärmetauschervorrichtung
DE102011015898B4 (de) 2011-04-01 2016-10-06 Christof Schulte-Göbel Schmalflächenbeschichtungsvorrichtung und Verfahren zum Aufbringen einer kleberfrei wärmeaktivierbaren Kantenbeschichtung mittels Heißluft oder Heißgas
DE102013208127A1 (de) 2013-05-03 2014-11-06 Homag Holzbearbeitungssysteme Gmbh Heißgaserzeugungseinrichtung
DE102015119373A1 (de) 2015-11-10 2017-05-11 Holger Kluge Heizvorrichtung, insbesondere für eine Kantenstreifenaufbringvorrichtung oder für eine Schneidvorrichtung zum Schneiden von Folien oder Werkstücken aus Kunststoff oder Hartschaum oder für eine Vorrichtung zum Schweißen von Werkstücken

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3611001A1 (fr) * 2012-08-03 2020-02-19 HOMAG GmbH Dispositif et procédé de revêtement de pièces à usiner
DE102013012644A1 (de) * 2013-07-30 2015-02-05 Ima Klessmann Gmbh Holzbearbeitungssysteme Beschichtungsvorrichtung sowie Aktivierungsmodul für eine Beschichtungsvorrichtung
EP2902160A1 (fr) * 2014-02-04 2015-08-05 BIESSE S.p.A. Macchina per la bordatura di pannelli di legno o simili
DE102017122701A1 (de) 2017-09-29 2019-04-04 Homag Gmbh Beschichtungsvorrichtung sowie Beschichtungsverfahren
DE102019113270A1 (de) * 2019-05-20 2020-11-26 Homag Gmbh Heißgaseinrichtung zum Bereitstellen von Heißgas sowie Beschichtungsvorrichtung und Verfahren zum Beschichten von Werkstücken
DE102019133934A1 (de) 2019-12-11 2021-06-17 Homag Gmbh Vorrichtung und Verfahren zum Beschichten eines Werkstücks

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DE102020131506A1 (de) 2022-06-02
CN114559504A (zh) 2022-05-31

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