EP4043167B1 - Dispositif de revêtement du côté étroit des pièces tabulaires et procédé d'application d'adhésif - Google Patents

Dispositif de revêtement du côté étroit des pièces tabulaires et procédé d'application d'adhésif Download PDF

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Publication number
EP4043167B1
EP4043167B1 EP22151447.4A EP22151447A EP4043167B1 EP 4043167 B1 EP4043167 B1 EP 4043167B1 EP 22151447 A EP22151447 A EP 22151447A EP 4043167 B1 EP4043167 B1 EP 4043167B1
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EP
European Patent Office
Prior art keywords
adhesive
drive
workpiece
edgeband
applicator roller
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.)
Active
Application number
EP22151447.4A
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German (de)
English (en)
Other versions
EP4043167C0 (fr
EP4043167A1 (fr
Inventor
Timo HEIDENREICH
Stefan Hüsener
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.)
IMA Schelling Deutschland GmbH
Original Assignee
IMA Schelling Deutschland GmbH
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Publication date
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Publication of EP4043167A1 publication Critical patent/EP4043167A1/fr
Application granted granted Critical
Publication of EP4043167C0 publication Critical patent/EP4043167C0/fr
Publication of EP4043167B1 publication Critical patent/EP4043167B1/fr
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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

Definitions

  • the invention relates to a device for coating the narrow side of plate-shaped workpieces according to the preamble of claim l and a method for applying adhesive.
  • a workpiece made of wood or wood substitute materials is joined over the narrow surfaces with a coating material, preferably edge bands, during the manufacture of panel-shaped workpieces.
  • the joining process is usually a gluing process in which various adhesives can be used.
  • Adhesive is any form of, in particular liquid, medium that is suitable for producing a firm connection between the narrow side of the workpiece and the coating material.
  • the adhesive can be a hot-melt adhesive.
  • hot melt adhesives are the most common.
  • the adhesives can be applied to both the workpiece and the coating material.
  • Adhesive application via a roller or a nozzle is common in the industry.
  • Other order types, e.g. B. through the use of an extruder or a pressure device, are not excluded.
  • the adhesive For the application of the adhesive, a relative movement is created between the workpieces or coating materials and the application devices. While in the so-called throughfeed technology the workpiece is guided past the units or assemblies for further processing, in the so-called stationary technology the units or assemblies for further processing run past the stationary fixed workpiece. These assemblies or units also include the adhesive application devices.
  • a reliable adhesive application is crucial for the quality of the entire workpiece. For this reason, it makes sense to use a device and a method that ensure this application and thus the joint quality in the desired quality. In the context of the generally increasing degree of automation, it is also desirable to automate this device or this method as far as possible.
  • the adhesive When using adhesive application devices in the form of adhesive application rollers, the adhesive is applied to the desired workpiece or edge band via a rotating adhesive application roller. It is crucial for a successful and high-quality application of adhesive that the adhesive application device is adjusted to a wide variety of materials via a machine or system control during the production of panel-shaped workpieces. Both material properties and process data must be taken into account.
  • One of the decisive factors is the feed speed, which results from the relative movement between the workpiece or coating material and the adhesive application device.
  • the peripheral speed of the adhesive application roller is synchronized with the translatory feed speed.
  • the torque is also relevant.
  • a high torque means that the drive unit is also able to process highly viscous adhesives.
  • the characteristic motor curve of the drive unit must be taken into account. According to the current state of the art, three-phase motors with frequency converters are used as the drive unit.
  • transmission stages of the speed and the torque can also be switched between the drive and the roller, as are customary, for example, with various types of gear drives or belt transmissions.
  • DE 102 34 618 A1 describes as a device according to the preamble of claim 1 a machining center in which an application roller can be controlled via a brushless electric motor.
  • the object of the present invention is therefore to provide a device, in particular an edge banding machine, for coating the narrow side of panel-shaped workpieces create, which meets the requirements for automation and constant process optimization.
  • the device according to the invention in particular an edge banding machine, is used for coating the narrow side of panel-shaped workpieces made of wood or wood substitutes with an edge band.
  • the device has an adhesive application device for applying a liquid adhesive, in particular hot-melt adhesive, to the narrow side of a workpiece or to an edgeband.
  • the adhesive application device includes an adhesive application roller for applying a liquid adhesive to the narrow side of the workpiece or to the edgeband.
  • the adhesive application roller is rotated about an axis of rotation by means of a drive controlled by a control device.
  • the drive includes a detection device that detects the torque of the drive.
  • a servo motor can be used for this purpose.
  • the detection device can be designed to continuously or at discrete time intervals detect operating data representative of the instantaneous operating state of the adhesive application device for the torque acting on its drive axle.
  • the device according to the invention creates an intelligent system which is characterized by the possibility of direct or indirect acquisition of operating data excellent.
  • Operating data recorded in this way such as the speed, the torque and/or the rotational position, can be further processed for process monitoring or process optimization purposes.
  • any drive unit with a detection device can be used for this purpose.
  • One of the suitable systems can be a servo motor, but other technologies such as stepper motors can also be expanded by retrofitting the appropriate components for recording operating data.
  • different drives can be combined with different detection devices to meet the desired requirements.
  • Possible drives include B. three-phase and DC motors. While DC motors can be divided into types with and without permanent magnets, three-phase motors are divided into synchronous and asynchronous types.
  • asynchronous motors can be z. B. can be divided into forms with aluminum or copper rotors.
  • Synchronous motors include permanent magnet and brushless motors as well as synchronous and switchable reluctance motors.
  • the possible recording devices can be grouped according to the operating data or measured variables to be recorded. For example, inductive and optical encoders as well as resolvers and Hall sensors can be used to record speeds.
  • the drive torque can be determined via the supplied current. The current required for operation can be determined and then calculated back to the specific torque for the drive.
  • the integration of various detection devices such as sensors within the drive train is also conceivable. For example, a torque pickup could be connected between the output shaft of the drive train of the drive and the adhesive application roller. This principle can of course be used for different Implement measured variables with different sensors or recording devices.
  • the feed drive is part of the device according to the invention.
  • the device comprises a further acquisition device which is designed to acquire operating data representative of the current operating state of the infeed drive continuously or at discrete time intervals.
  • the separate control device or devices is preferably designed to change the operating state of the infeed drive and/or the drive, in particular on the basis of the operating data recorded.
  • the quality standard for the joining process can be raised.
  • the user also has the option of recording or saving operating data in real time. This allows the user z. B. optimize the current process directly or carry out quantified quality assessments based on the collected data.
  • the adhesive application is also relevant for a good quality result. In particular, it is important to distribute the adhesive evenly and to apply a defined amount of adhesive to the workpiece and/or the edgeband. Adhesive viscosity is related to the amount of adhesive applied by the roller to the workpiece or edgeband. Preference is therefore after A preferred embodiment of the method according to the invention provides that the viscosity of the adhesive and the quantity of adhesive applied to the workpiece and/or the edge band is determined from the detected operating state, in particular from the torque mentioned above.
  • One application for the implementation of the device according to the invention is the automatic control of the start-up process of the adhesive application.
  • the determined operating data are preferably not only recorded, but depending on the comparison in step c. the distance between the adhesive application device and the workpiece or the edgeband changes.
  • the start-up process includes the first period of the acceleration phase of the driven adhesive application roller from standstill to rotation. If a solid adhesive, in particular a hot-melt adhesive, is heated, the viscosity changes.
  • the adhesive application device can only be put into operation when the adhesive is in a low-viscosity aggregate state; if the application is started too early, the drive unit of the adhesive application device can be damaged.
  • adhesive-specific processing temperatures have been used in the system up to now deposited. These temperatures are measured by sensors and release the drive for operation when the target temperature is reached. The measured temperature at the sensor actually does not correspond to the actual temperature of the adhesive, because such temperature sensors z. B. on the housing of an adhesive storage and not in the adhesive mass itself.
  • each adhesive has an individual specific heat capacity and thermal conductivity, resulting in different heating behaviors.
  • the viscosity is used as an indicator for a ready-to-use adhesive.
  • the viscosity is directly related to the condition of the adhesive when it is ready for application.
  • the viscosity of the adhesive influences other operating data of the system, e.g. B. the required torque of the drive of the adhesive application roller. If the viscosity exceeds or falls below an adhesive-specific limit value, a reliable statement can be made about the operational readiness. Changes in the application environment can also lead to changes in the adhesive during operation, which have a negative impact on the process quality. According to the invention, these can be detected and returned to the controller of the application unit.
  • the adhesive applicator roller can, e.g. B. be moved via an infeed drive in an alternative position in which the adhesive application roller has no contact with the workpiece or edgeband and thus applies no adhesive. This prevents raw materials in the form of workpieces, coating materials and adhesive from being used up unnecessarily.
  • the process data determined in this way can also provide information about which components of the batch or shift were produced under ideal conditions and which were not. This allows poor-quality finished parts to be identified and sorted out.
  • FIG 1 is a schematic representation of an exemplary device 1 according to the invention in the form of an edge banding machine.
  • Plate-shaped workpieces 5 are guided with their narrow side along a reference plane V in the feed direction X.
  • the Y direction transverse to the feed direction is referred to as the infeed direction.
  • an edge band K is brought up to the workpiece 5 and joined to the narrow side of the workpiece 5 in the area of the reference plane V.
  • the workpiece 5 is first formatted on its narrow side, this is usually done by a milling cutter 50 before the edgeband K is brought up to the workpiece 5.
  • Reference number 7 designates a first sensor, which detects workpiece 5 moving in feed direction X and forwards this information to a control device (not shown).
  • Reference number 8 designates a second sensor, which detects the supplied edge band K and forwards this information to the control device.
  • the central part of the device 1 according to the invention is the adhesive application device 2.
  • This is now in relation to figures 2 and 3 explained in more detail. So far in the figures 2 and 3 Reference signs are present, which are already associated with figure 1 have been explained, reference is made to the corresponding statements above.
  • Z denotes the vertical direction, perpendicular to the infeed direction Y and to the feed direction X.
  • the adhesive application device 2 preferably has an adhesive container 3 and an adhesive application roller 40, which is arranged in the immediate vicinity of the existing adhesive container 3, so that adhesive heated in the adhesive container 3 can be applied directly to the roller 40.
  • the adhesive application roller 40 is rotatably driven about an axis L.
  • a drive 31 is used for this purpose, which is preferably embodied as a servo motor, but in any case comprises a drive that transmits operating data such as the rotational speed of drive 31 or roller 40 and/or the torque acting on the drive axle and/or the rotational position of roller 40 or of the drive 31 reports back to the control device (not shown) of the device 1 according to the invention.
  • the adhesive application roller 40 is in turn mounted to be displaceable in the infeed direction Y relative to a stationary frame section 50 of the device according to the invention.
  • a carriage or table 4 is preferably used for this purpose, which can be displaced in relation to the frame section 50 in the infeed direction Y or counter to it.
  • the device 1 according to the invention includes a corresponding feed drive 30, which will not be explained in more detail here.
  • This feed drive 30 can be controlled via the control device (not shown) of the device 1 according to the invention.
  • FIG 3 a sectional view of the device 1 is shown.
  • the situation in which the roller 40 coats the workpiece 5 with adhesive on its narrow side is shown as an example.
  • the device according to the invention offers several possibilities, especially in the start-up phase but also during the regular coating process.
  • a coating process i.e. the application of adhesive to the workpiece 5 and/or edgeband (this situation is not shown here) may or may not be continued due to the viscosity of the adhesive on the adhesive applicator roller 40 being too high. If necessary, the workpiece 5 is not fed in at all.
  • Sensors 7 and 8 shown can be used in this case to that the workpiece 5 or the edge band K of the adhesive application device 2 are not fed.
  • the uniform application of adhesive to the corresponding workpiece 5 or edge band can also be influenced in such a way that the operating data returned by the drive 31 are compared in the control device with specified viscosity data and, based on this comparison, the distance between the adhesive application roller 40 and the workpiece 5 or the edge band is changed.
  • a scanning or a scanning distance T between the reference plane V and a further reference plane A, which is stationary relative to the movable part 4 of the adhesive agent application device 2 is preferably changed accordingly by displacing the adhesive agent application roller 40 in or counter to the infeed direction Y by means of the infeed drive 30 until the operating data returned by the drive 31 either continuously or at time intervals are within a predetermined value range or have reached a predetermined value.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (9)

  1. Dispositif (1), surtout plaqueuse de chants, pour revêtir le petit côté des pièces en forme de plaque (5) en bois ou en matériaux de substitution du bois avec une bande de chant (K), dans lequel le dispositif (1) comporte un dispositif d'application d'adhésif (2) pour appliquer un adhésif liquide, surtout une colle à fusion, sur le petit côté (6) d'une pièce (5) ou sur une bande de chant (K), dans lequel le dispositif d'application d'adhésif (2) comporte un rouleau d'application d'adhésif (40) pour appliquer un adhésif liquide sur le petit côté (6) de la pièce (5) ou sur la bande de chant (K), dans lequel le rouleau d'application d'adhésif (40) est entraîné en rotation autour d'un axe de rotation (L) par l'intermédiaire d'un entraînement (31) commandé par un dispositif de commande,
    caractérisé en ce
    que l'entraînement (31) comporte un dispositif d'entraînement avec un dispositif de détection qui détecte le couple de rotation de l'entraînement (31), surtout un servomoteur.
  2. Dispositif (1) selon la revendication 1,
    caractérisé en ce
    que le rouleau d'application d'adhésif (40) peut être déplacé dans une direction d'avance (Y) ou dans une direction opposée à la direction d'avance (Y) par l'intermédiaire d'un entraînement d'avance (30) commandé par le dispositif de commande ou par un dispositif de commande séparé.
  3. Dispositif (1) selon la revendication 1 ou 2,
    caractérisé en ce
    que le dispositif de détection est conçu pour détecter en continu ou à des intervalles de temps discrets des données de fonctionnement représentatives de l'état de fonctionnement momentané du dispositif d'application d'adhésif (2) pour le couple de rotation agissant sur son axe d'entraînement.
  4. Dispositif (1) selon l'une quelconque des revendications précédentes, caractérisé en ce
    qu'il comporte un autre dispositif de détection, qui est conçu pour détecter en continu ou à des intervalles de temps discrets des données de fonctionnement représentatives de l'état de fonctionnement momentané de l'entraînement d'avance (30).
  5. Dispositif (1) selon la revendication 3 ou 4,
    caractérisé en ce
    que le dispositif de commande ou le dispositif de commande séparé est conçu pour modifier l'état de fonctionnement de l'entraînement d'avance (30) et/ou de l'entraînement (31), surtout en raison des données de fonctionnement détectées.
  6. Procédé d'application d'adhésif sur une bande de chant (K) ou/et sur le petit côté (6) d'une pièce en forme de plaque (5) par l'intermédiaire d'un dispositif selon l'une quelconque des revendications précédentes, dans lequel une pièce (5) ou la bande de chant (K) est déplacée par rapport au rouleau d'application d'adhésif (40) dans une direction d'avance (X), dans lequel le petit côté (6) de la pièce (5) ou de la bande de chant (K) est tourné vers le rouleau d'application d'adhésif (40), et dans lequel le rouleau d'application d'adhésif (40) est alimenté avec l'adhésif et l'adhésif est appliqué sur le petit côté (6) de la pièce (5) ou de la bande de chant (K) par l'intermédiaire du rouleau d'application d'adhésif (40), et dans lequel en outre les étapes suivantes sont réalisées:
    a. le rouleau d'application d'adhésif (40) est tourné autour d'un axe de rotation (L) s'étendant, de préférence, perpendiculaire à la direction d'avancement (X), pour appliquer l'adhésif par l'intermédiaire de l'entraînement,
    b. des valeurs pour les données de fonctionnement du rouleau d'application d'adhésif (40) ou de l'entraînement (31) sont détectées, à savoir des valeurs pour le couple de rotation agissant sur l'axe d'entraînement de l'entraînement (31),
    c. les valeurs détectées sont comparées à une valeur de consigne prédéfinie
    et
    que la viscosité de l'adhésif est déterminée à partir du couple de rotation détecté en étape b. agissant sur l'axe d'entraînement de l'entraînement (31) et la quantité d'adhésif appliquée sur la pièce (5) et/ou la bande de chant (K) est déterminée à partir de la viscosité.
  7. Procédé selon la revendication 6,
    caractérisé en ce
    que
    d. si, dans une phase de démarrage, après une première durée prédéfinie (t1) à l'étape c., le couple de rotation détecté ou des données de fonctionnement représentatives de celui-ci du rouleau d'application d'adhésif (40) ou le couple de rotation détecté ou des données de fonctionnement représentatives de celui-ci de l'entraînement (31) du rouleau d'application d'adhésif (40) a atteint ou dépassé une valeur limite prédéfinie, surtout spécifique à l'adhésif utilisé, le processus d'application est interrompu, en particulier par l'arrêt de l'amenée de pièces (5) ou de la bande de chant (K) ou par l'éloignement du rouleau d'application d'adhésif (40) de la pièce (5) ou de la bande de chant (K), pendant une durée de temps prédéfinie (t2).
  8. Procédé selon la revendication 7,
    caractérisé en ce
    que l'étape d. est répétée aussi longtemps que la valeur limite prédéfinie n'est pas atteinte.
  9. Procédé selon l'une quelconque des revendications 6 à 8,
    caractérisé en ce
    que, en fonction de la comparaison effectuée à l'étape c., la distance (T) entre le dispositif d'application d'adhésif (2) et la pièce (5) ou la bande de chant (K) est modifiée.
EP22151447.4A 2021-02-10 2022-01-13 Dispositif de revêtement du côté étroit des pièces tabulaires et procédé d'application d'adhésif Active EP4043167B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021103136.2A DE102021103136A1 (de) 2021-02-10 2021-02-10 Vorrichtung zum Beschichten der Schmalseite von plattenförmigen Werkstücken und Verfahren zum Auftragen von Haftmittel

Publications (3)

Publication Number Publication Date
EP4043167A1 EP4043167A1 (fr) 2022-08-17
EP4043167C0 EP4043167C0 (fr) 2023-09-06
EP4043167B1 true EP4043167B1 (fr) 2023-09-06

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EP22151447.4A Active EP4043167B1 (fr) 2021-02-10 2022-01-13 Dispositif de revêtement du côté étroit des pièces tabulaires et procédé d'application d'adhésif

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EP (1) EP4043167B1 (fr)
DE (1) DE102021103136A1 (fr)
PL (1) PL4043167T3 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023101775A1 (de) * 2023-01-25 2024-07-25 Homag Gmbh Vorrichtung und Verfahren zur Erfassung der Dicke einer aufgetragenen Schicht und Maschine zur Beschichtung mit einer Erfassung der Dicke einer aufgetragenen Schicht

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019113932A1 (de) * 2019-05-24 2020-11-26 Homag Gmbh Verfahren zum Beschichten eines Bauteils sowie Beschichtungsvorrichtung

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Publication number Priority date Publication date Assignee Title
DE19916776C2 (de) 1999-04-14 2001-07-19 Henkel Dorus Gmbh & Co Kg Vorrichtung zum Auftragen eines Klebstoffs
ITBO20010481A1 (it) 2001-07-27 2003-01-27 Biesse Spa Gruppo bordatore per la bordatura di pannelli di legno o simili
DE202007006550U1 (de) 2007-04-30 2007-07-12 Weiß Holzmaschinen GmbH Kanten-Anleimvorrichtung für den mobilen Einsatz
DE202009006794U1 (de) 2009-05-12 2009-09-03 Homag Holzbearbeitungssysteme Ag Anleimaggregat
DE202013101694U1 (de) 2013-04-19 2014-07-22 Düspohl Maschinenbau Gmbh Vorrichtung zum Beschichten von Profilen
ITUB20152366A1 (it) 2015-07-21 2017-01-21 Biesse Spa Macchina per la bordatura di pannelli di legno o simili
DE102017122701A1 (de) 2017-09-29 2019-04-04 Homag Gmbh Beschichtungsvorrichtung sowie Beschichtungsverfahren
DE102018208062A1 (de) 2018-05-23 2019-11-28 Homag Gmbh Andrückvorrichtung zum Andrücken eines Beschichtungsmaterials gegen platten- oder leistenförmige Werkstücke

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
DE102019113932A1 (de) * 2019-05-24 2020-11-26 Homag Gmbh Verfahren zum Beschichten eines Bauteils sowie Beschichtungsvorrichtung

Also Published As

Publication number Publication date
DE102021103136A1 (de) 2022-08-11
EP4043167C0 (fr) 2023-09-06
EP4043167A1 (fr) 2022-08-17
PL4043167T3 (pl) 2024-02-26

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