EP4655110A1 - Dispositif et procédé de capture de l'épaisseur d'une couche appliquée et machine de revêtement avec capture de l'épaisseur d'une couche appliquée - Google Patents

Dispositif et procédé de capture de l'épaisseur d'une couche appliquée et machine de revêtement avec capture de l'épaisseur d'une couche appliquée

Info

Publication number
EP4655110A1
EP4655110A1 EP24702106.6A EP24702106A EP4655110A1 EP 4655110 A1 EP4655110 A1 EP 4655110A1 EP 24702106 A EP24702106 A EP 24702106A EP 4655110 A1 EP4655110 A1 EP 4655110A1
Authority
EP
European Patent Office
Prior art keywords
adhesive
temperature
application
thickness
distance
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
Application number
EP24702106.6A
Other languages
German (de)
English (en)
Inventor
Jonathan Würz
Patrick Seeger
Lars Weimer
Yimin Gan
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 EP4655110A1 publication Critical patent/EP4655110A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1015—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to a conditions of ambient medium or target, e.g. humidity, temperature ; responsive to position or movement of the coating head relative to the target
    • B05C11/1021—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to a conditions of ambient medium or target, e.g. humidity, temperature ; responsive to position or movement of the coating head relative to the target responsive to presence or shape of target
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/006—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to the edges of essentially flat articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1005—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material already applied to the surface, e.g. coating thickness, weight or pattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1015—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to a conditions of ambient medium or target, e.g. humidity, temperature ; responsive to position or movement of the coating head relative to the target
    • B05C11/1018—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to a conditions of ambient medium or target, e.g. humidity, temperature ; responsive to position or movement of the coating head relative to the target responsive to distance of target
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0204—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to the edges of essentially flat articles
    • 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 method for detecting the thickness of a layer applied to a surface, in particular an adhesive layer, and to a machine for coating a surface, in particular a narrow surface of a plate-shaped workpiece consisting at least partially of wood, wood-based material, plastic or the like, with adhesive in order to attach an edge band thereto.
  • Panel-shaped workpieces made of wood or wood-like materials are usually provided with an edge band that is connected to the narrow surface of the workpiece using an adhesive.
  • Thermoplastic hot melt adhesives such as EVA and PO, but also PUR hot melt, are mainly used for this.
  • the thickness of the adhesive layer is also a significant factor influencing the quality of the connection.
  • DE 10 2017 122701 A1 discloses a coating device for coating a narrow side of a workpiece, which device controls a detection device for detecting a surface property on the surface of the workpiece to be coated and, based thereon, a device for acting on the adhesive.
  • the device comprises a first measuring unit which is designed to detect a first property of an adhesive layer applied to a narrow surface of a workpiece, a surface of an edge band or a surface of an application roller in a contactless manner, and a control unit which is designed to determine a layer thickness of the applied adhesive on the basis of the first property.
  • the device further comprises a second measuring unit which is designed to detect a second property of an adhesive layer applied to a narrow surface of a workpiece, a surface of an edge band or a surface of an application roller or a reference property in a contactless manner, wherein the The control unit is set up to determine the layer thickness of the applied adhesive on the basis of the first and second recorded properties.
  • a second measuring unit which is designed to detect a second property of an adhesive layer applied to a narrow surface of a workpiece, a surface of an edge band or a surface of an application roller or a reference property in a contactless manner, wherein the The control unit is set up to determine the layer thickness of the applied adhesive on the basis of the first and second recorded properties.
  • the first property and/or the second property is a temperature and/or a distance to a surface and/or can be detected by means of laser triangulation, fluorescence laser scanning, optical coherence tomography, active thermography and/or terahertz radar technology.
  • adhesive is often used which is first heated to a defined application temperature and then continuously applied to the workpiece surface to be coated at a defined relative speed in the longitudinal direction.
  • the device according to the invention can therefore be set up to be connected to the coating machine in such a way that the first measuring unit has a defined distance in the longitudinal direction behind the location of the adhesive application.
  • the defined relative speed and the defined distance result in a time difference that any point on the workpiece surface or on the adhesive layer needs to travel from the location of the adhesive application to the location of the temperature detection by the first measuring unit.
  • the cooling rate and consequently the thickness of the applied adhesive layer can be determined by taking into account the time difference, the known application temperature and the recorded temperature.
  • the alternative distance measurement also makes it possible to determine the layer thickness of adhesives that are not heated first, but are applied directly to the surface to be coated at room temperature.
  • the distance measurement is less susceptible to influence by other factors such as the dimensions, nature and temperature of the surface before the adhesive is applied, the temperature and humidity of the ambient air, as well as the heat capacity and heat conduction of the adhesive and the material to which the adhesive is applied.
  • the layer thickness measurement by means of temperature or distance detection is characterized by high accuracy, speed, Economic efficiency and practicability, particularly against the background of high tolerances of the transport chain within two measuring points.
  • the first property and/or the second property can also be other layer thickness-dependent properties that can be detected by corresponding measuring methods such as laser triangulation, fluorescence laser scanning, optical coherence tomography, active thermography or terahertz radar technology.
  • the methods mentioned are characterized by high measurement accuracy.
  • laser triangulation the light section technique with linear detection has proven to be particularly advantageous, while for fluorescence laser scanning, a UV laser with a wavelength ⁇ 400 nm is preferably used.
  • control unit is configured to determine and/or regulate an adhesive quantity to be applied in the future on the basis of the determined layer thickness, in particular by means of a corresponding interface for controlling a provided adhesive flow and/or a generated relative speed.
  • Determining the amount of adhesive to be applied in the future makes it possible to compensate for deviations from the specifications in the form of an adhesive layer that is too thick, too thin or too inhomogeneous by adjusting the production process accordingly, for example by adjusting the adhesive flow provided or the relative speed generated. Automated control through an appropriate machine interface also saves costs and shortens the reaction time, so that deviations from the specifications can be further reduced, thereby improving quality and reducing waste.
  • the machine according to the invention comprises a dosing unit for
  • a Application unit for applying the adhesive to the surface as well as the device according to the invention, wherein the application unit is set up to apply the adhesive, e.g. by means of an application nozzle, directly to the narrow surface of the workpiece and/or directly to the surface of the edge band or to first apply it to the surface of an application roller which is set up to subsequently apply the adhesive to the narrow surface of the workpiece and/or to the surface of the edge band.
  • the provision of a machine for applying adhesive with the device according to the invention has the advantage that the individual components of the machine and the device can be better coordinated with one another and that possible problems which can arise when retrofitting an existing machine with the device according to the invention can be avoided.
  • the additional provision of a movement unit has the advantage that an automated relative movement with a defined speed can be realized between the machine and the surface to be coated. Due to the precise and uniform speed of an automated relative movement, resulting Deviations from the specified thickness of the applied adhesive layer can be avoided as far as possible.
  • the additional provision of a pressing unit has the advantage that the coating of the surface with adhesive and the subsequent joining process can be carried out immediately one after the other in the same machine. Since the adhesive has only hardened or cooled slightly during the joining process, the quality of the adhesive bond is improved compared to a separate joining process. In addition, time and costs can be saved because no additional machines or work steps are required for the joining process.
  • the adhesive is heated to a defined application temperature for application
  • the first and/or second measuring unit are set up to detect a first and/or a second temperature of the applied adhesive and/or the surface before the adhesive is applied and/or the ambient air
  • the control unit is set up to determine the thickness of the applied adhesive layer on the basis of the first and/or the second temperature, in particular taking into account the speed of the relative movement, the first and/or the second detected distance, the application temperature, the surface temperature before the adhesive is applied, the ambient temperature, the heat capacity and/or heat conduction of the surface and/or the adhesive .
  • a temperature measurement has the advantage that the recorded temperature can be influenced by fluctuations in the distance between the first measuring unit and the surface to be coated, for example due to tolerances in the relative movement or the parallelism of the workpiece edges, cannot be distorted.
  • the temperature can be measured, for example, using a pyrometer that detects a point on the surface of the adhesive layer that moves longitudinally over it at the relative speed, whereby temperature fluctuations and thus fluctuations in the layer thickness in the longitudinal direction can also be detected.
  • a thermal camera can be used, which detects a larger area of the adhesive layer, so that temperature fluctuations and thus fluctuations in the layer thickness in the height direction can also be detected.
  • the first measuring unit is configured to detect a first temperature of the applied adhesive at a first defined distance from the application unit
  • the second measuring unit is configured to detect a second temperature of the applied adhesive at a second defined distance from the application unit
  • the control unit is configured to determine the thickness of the applied adhesive layer on the basis of a temperature difference between the first temperature and the second temperature.
  • the recording of the second temperature has the advantage that the thickness of the applied adhesive layer can be reliably determined even if the original application temperature is unknown or can only be set imprecisely. Since thinner layers cool down more quickly, the difference between the first temperature and the second temperature is greater the thinner the applied layer is. Based on the distance between the first measuring unit and the second measuring unit and the difference between the first temperature and the second temperature, the cooling speed and consequently the thickness of the adhesive layer can be determined. If the If the original application temperature is known, the accuracy can also be improved by taking into account both the recorded temperatures and their difference when determining the cooling rate or the thickness of the adhesive layer.
  • the first and/or the second measuring unit are configured to detect a first and/or a second distance to the applied adhesive layer and/or to the surface before the adhesive is applied, and the control unit is configured to determine the thickness of the applied adhesive layer on the basis of the first and/or the second detected distance.
  • Distance measurement has the advantage that it can also be used to determine layer thicknesses of adhesives that are not first heated but are applied directly to the surface to be coated at room temperature.
  • distance measurement is less susceptible to influence by other factors such as the dimensions, condition and temperature of the surface before the adhesive is applied, the temperature and humidity of the ambient air, and the heat capacity and heat conduction of the adhesive and the material to which the adhesive is applied.
  • the distance can be measured using light section sensors or triangulation sensors, for example.
  • the measuring beam and the measuring surface can extend spatially in all spatial axes, whereby the spatial positions of the measuring unit(s) are known or are referenced when the machine is put into operation.
  • the difference between the thickness of the adhesive layer on the applicator roller before and after transfer or the depth of a corresponding depression in the adhesive layer on the application roller after transfer essentially corresponds to the thickness of the adhesive layer that is applied to the surface to be coated.
  • the thickness of the applied adhesive layer can be determined from the known thickness of the adhesive layer on the application roller, the known distance of the measuring unit to the surface of the application roller and the distance to the bottom of the depression in the adhesive layer on the application roller.
  • Detecting the second distance has the advantage that the thickness of the adhesive layer applied to the surface to be coated can be reliably determined even if the thickness of the adhesive layer on the application roller is not known or is subject to fluctuations. As long as the distance between the first and second measuring units is known, the exact distance to the application roller does not have to be known, since the thickness of the applied adhesive layer is the result of the difference between the two measured distances. If the distance to the application roller is known, the accuracy can also be improved by taking both the measured distances and their difference into account when determining the layer thickness.
  • Distance measurement has the advantage that it can also be used to determine layer thicknesses of adhesives that are not first heated but are applied directly to the surface to be coated at room temperature.
  • distance measurement is less susceptible to influence by other factors such as the dimensions, condition and temperature of the surface before the adhesive is applied, the temperature and humidity of the ambient air, and the heat capacity and heat conduction of the adhesive and the material to which the adhesive is applied.
  • the distance can be measured using light section sensors or triangulation sensors, for example.
  • the measuring beam and the measuring surface can extend spatially in all spatial axes, whereby the spatial positions of the measuring unit(s) are known or are referenced when the machine is put into operation.
  • the method according to the invention further comprises determining and/or regulating an adhesive quantity to be applied in the future on the basis of the determined layer thickness, in particular by means of a corresponding interface for controlling a provided adhesive flow and/or a generated relative speed.
  • Fig. 1a is a perspective view of a first and second embodiment of a device according to the invention and of a machine according to the invention;
  • Fig. 1b is a plan view of the first and second embodiment of an inventive
  • Fig. 1c shows schematically two cooling curves of adhesive layers with different layer thicknesses:
  • Fig. 2a is a perspective view of a third and fourth embodiment of a device according to the invention and of a machine according to the invention;
  • Fig. 2b is a plan view of the third and fourth embodiment of an inventive
  • Fig. 3b is a plan view of the fifth embodiment of a device according to the invention and a machine according to the invention;
  • Fig. 4 is a perspective view of a sixth embodiment of an inventive
  • Fig. 1a and 1b show a first and second embodiment of a device (1) according to the invention for determining an amount of adhesive (3) applied to a surface (2a) and a machine (10) according to the invention for applying adhesive (3) to a surface (2a).
  • the device (1) according to the invention can be retrofitted into an existing machine (10) or can already be integrated into a machine (10) according to the invention.
  • the devices, machines and methods described are suitable for applying adhesive both to the workpiece (4) and to the edge band (5). In the following, only the application of adhesive to the workpiece (4) is described in more detail.
  • the device (1) comprises a first measuring unit (7a) and an optional second measuring unit (7b), which are connected to a control unit (8).
  • the machine (10) comprises a dosing unit (11) for dosing a stream of adhesive to be applied, an application unit (12) for applying the adhesive (3) to a narrow surface (2a, 2b) of a plate-shaped workpiece (4), and the device (1) for determining the amount of adhesive applied.
  • the machine (10) further comprises a movement unit (not shown) for moving the workpiece (4) at a speed (v) in a direction of movement (X) along the narrow surface (2a, 2b) of the workpiece (4).
  • the application unit (12) can be moved along the narrow surface (2a, 2b) of the workpiece (4), both manually and automatically.
  • the dosing unit (11) removes a defined amount of adhesive (3) per unit of time from a reservoir (not shown) and passes it on to the application unit (12), which then applies the adhesive (3) evenly to the narrow surface (2a, 2b) of the workpiece (4).
  • the dosing unit (11) can be designed, for example, as a valve, pump or scraper unit (such as a doctor blade) and can be integrated into the application unit (12).
  • the application unit (12) can have a slot-shaped outlet (not shown), the width of which can be adjustable and the height of which extends over the entire height of the narrow surface (2a, 2b) of the workpiece (4).
  • the adhesive (3) applied by the application unit (12) is evenly distributed over the narrow surface (2a, 2b) of the workpiece (4), so that a uniform adhesive layer (3) is formed thereon.
  • the thickness (d) of the adhesive layer (3) can be varied by varying the Dosing unit (11) provided adhesive flow and/or by varying the relative speed (v) generated by the movement unit between the workpiece (4) and the application unit (12).
  • the adhesive (3) is heated to a defined application temperature (TO) during application.
  • the first measuring unit (7a) can be designed, for example, as a pyrometer or as a thermal camera and records a first temperature (Ta) of the applied adhesive layer (3) without contact at a defined distance (Xa) from the application unit (12) in the direction of movement (X).
  • the relative speed (v) and the distance (Xa) result in a defined time difference between the temperature (TO) during application of the adhesive (3) and the first temperature (Ta).
  • the adhesive (3) cools down more slowly the thicker the applied layer is.
  • the cooling rate and consequently the thickness (d) of the applied adhesive layer (3) can thus be determined on the basis of the application temperature (TO) and the first temperature (Ta).
  • thermal camera with an area sensor has the advantage that each pixel value reflects the temperature of the adhesive layer being photographed (at feed rate at different time intervals).
  • a thermal camera can therefore record a large number of temperature values in order to determine the cooling curve more precisely using several reference values, so that the layer thickness can be recorded more precisely.
  • a second measuring unit (7b) can optionally be provided, which measures the temperature of the ambient air, the temperature of the surface (2b) before the adhesive is applied (as shown in Fig. 1a and 1b) or the temperature of the adhesive (3) after the adhesive is applied (not shown).
  • the second measuring unit (7b) is in a defined Distance (Xb) to the application unit (12) and thus in the direction of movement (X) at a defined distance in front of or behind the first measuring unit (7a).
  • the difference between the first temperature (Ta) and the second temperature (Tb) is greater the thinner the applied layer is, since thinner layers cool down more quickly.
  • the cooling rate and consequently the thickness (d) of the adhesive layer (3) can be determined.
  • Fig. 1c shows two cooling curves of adhesive layers with different layer thicknesses.
  • both layers have the same application temperature (T0).
  • the thick layer has cooled to the temperature (Tal) and the thin layer to the temperature (Ta2), whereby the temperature of the thick layer is still higher than the temperature of the thin layer (Tal > Ta2).
  • the thickness (d) of the adhesive layer can therefore already be determined on the basis of the application temperature (T0) and the first temperature (Ta).
  • the thick layer has cooled further to the temperature (Tbl) and the thin layer to the temperature (Tb2), whereby the difference (AT) between the first temperature (Ta) and the second temperature (Tb) of the thin layer is greater than that of the thick layer (AT2 ⁇ ATI).
  • the thickness (d) of the adhesive layer can thus be determined, even if the original application temperature (TO) is not known or can only be set imprecisely.
  • the first and second points in time (ta, tb) correspond to the first and second distances (Xa, Xb) of the respective measuring units (7a, 7b) from the application unit (12).
  • the cooling rate of the adhesive depends on other influencing factors such as the dimensions, the condition and the temperature of the surface before the adhesive is applied, the temperature and humidity of the ambient air, as well as the heat capacity and heat conduction of the adhesive and the material to which the adhesive is applied.
  • the influence of the layer thickness on the cooling rate can be determined through appropriate tests.
  • the influencing factors must be kept as constant as possible or taken into account accordingly.
  • the first measuring unit (7a) is arranged at a defined distance in a normal direction (Y) perpendicular to the narrow surface (2a, 2b) of the workpiece (4) and detects a first distance (Da) to the applied adhesive layer (3).
  • the difference between the defined distance to the workpiece surface (2a) and the detected first distance (Da) thus corresponds to the thickness (d) of the applied adhesive layer (3).
  • a second measuring unit (7b) can optionally be provided in addition to the first measuring unit (7a), which is also arranged at a defined distance in a normal direction (Y) perpendicular to the narrow surface (2a, 2b) of the workpiece (4) and detects a second distance (Db) to the workpiece surface (2b) before the adhesive is applied.
  • the second distance (Db) serves as a reference value in order to detect fluctuations in the distance between the first measuring unit (7a) and the workpiece surface (2a), for example due to relative movement, and to take this into account when determining the layer thickness.
  • both measuring units (7a, 7b) have the same distance from the workpiece surface (2a, 2b), which essentially corresponds to the second distance (Db), so that the difference between the recorded distances (Da, Db) corresponds to the thickness (d) of the applied adhesive layer (3).
  • the two measuring units (7a, 7b) can also have different distances from the workpiece (4), which are taken into account when determining the layer thickness.
  • the control unit (8) can also be configured to determine and regulate an adhesive quantity to be applied in the future on the basis of the determined thickness (d) of the applied adhesive layer (3), in particular by controlling the adhesive flow provided by the dosing unit (11) and/or the relative speed (v) generated by the movement unit between the workpiece (4) and the application unit (12).
  • Fig. 2a and 2b show a third and fourth embodiment of a device (1) according to the invention for determining an amount of adhesive applied to a surface (2a)
  • the third and fourth embodiments comprise essentially the same components and features as the first and second embodiments described above and differ therefrom only in that the adhesive (3) is not applied directly by the application unit (12) to the workpiece (4), but indirectly via an application roller (6).
  • the adhesive layer (3) is applied to the workpiece (4) in the area of the narrow surface (2a, 2b) by the application roller (6), so that that in this area of the application roller (6) a depression is formed in the adhesive layer (3), the depth of which essentially corresponds to the thickness of the adhesive layer (3) that was applied to the workpiece (4).
  • the depression in the adhesive layer (3) of the application roller (12) is then refilled by the application unit (12).
  • Fig. 3a and 3b show a fifth embodiment of a device (1) according to the invention for determining an amount of adhesive (3) applied to a surface (2a) and a machine (10) according to the invention for applying adhesive (3) to a surface (2a). Except for the arrangement of the first measuring unit (7a) and/or the second measuring unit (7b), the fifth embodiment essentially corresponds to the fourth embodiment described above. For better clarity, the workpiece (4) is not shown in Fig. 3a, which is arranged as shown in Fig. 2a.
  • the first measuring unit (7a) and the optional second measuring unit (7b) are not directed at the workpiece (4), but at an area of the application roller (6) before the adhesive is applied by the application unit (12) and after the adhesive is transferred to the workpiece (4), which area has the recess in the adhesive layer (3).
  • the first measuring unit (7a) is arranged at a defined distance from the outer surface of the application roller (6) and detects a first distance (Da) from the bottom of the depression, i.e. from the adhesive layer (3) after transfer to the workpiece (4). If the entire adhesive (3) has been applied to the workpiece (4) in the area of the depression, the first distance (Da) corresponds to the defined distance from the outer surface of the application roller (6). The difference between the defined distance and the defined thickness of the adhesive layer (3) corresponds to the distance between the first measuring unit (7a) and the adhesive layer (3) before transfer to the workpiece (4). The thickness (d) of the adhesive layer (3) applied to the workpiece (4) is thus determined from the difference in the distance to the adhesive layer (3) on the application roller (6) before and after transfer to the workpiece (4).
  • a second measuring unit (7b) can optionally be provided, which is also arranged at a defined distance from the outer surface of the application roller (6) and detects a second distance (Db) to the adhesive layer (3) on the application roller (6) before transfer to the workpiece (4) or in an area in which no transfer to the workpiece (4) takes place.
  • the second distance (Db) serves as a reference value in order to detect fluctuations in the defined thickness of the adhesive layer (3) on the application roller (6) and to take this into account when determining the thickness (d) of the adhesive layer (3) applied to the workpiece (4).
  • both measuring units (7a, 7b) have the same distance to the outer surface of the application roller (12), so that the difference between the measured distances (Da, Db) corresponds to the thickness (d) of the adhesive layer (3) applied to the workpiece (4).
  • the two measuring units (7a, 7b) can also have different distances to the
  • first distance (Da) and the second distance (Db) can also be measured with the same measuring unit (7a) (see Fig. 4).
  • Fig. 4 shows a sixth embodiment of a device (1) according to the invention for determining an amount of adhesive (3) applied to a surface (2a) and a machine (10) according to the invention for fastening an edge band (5) on the narrow side (2a, 2b) of a plate-shaped workpiece (4) by means of adhesive (3).
  • the sixth embodiment essentially corresponds to the fifth embodiment, in which the adhesive (3) is applied by means of a rotating application roller (6) to the narrow side of a plate-shaped workpiece (4), which is moved along the application roller (6) at a defined speed (v).
  • the dosing unit (11) and the application unit (12) are integrated into the application roller (6).
  • the machine (10) also comprises a pressing unit (14) for pressing the edge band (5) onto the workpiece (4).
  • the edge band (5) is pressed by the pressing unit (14) onto the narrow side of the workpiece (4) coated with adhesive (3) in order to connect it to the workpiece (4).
  • the first measuring unit (7a) records both the first distance (Da) to the bottom of the recess and the second distance (Db) to the surface of the adhesive layer (3) on the application roller (6) in an area in which no transfer to the workpiece (4) takes place.

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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)

Abstract

La présente invention concerne un dispositif (1) pour déterminer une quantité d'adhésif (3) appliquée sur une surface (2), en particulier pour fixer une bande de bord (5) à une face étroite d'une pièce usinée plate (4) qui est constituée au moins partiellement de bois, d'un matériau en bois, de plastique ou similaire, en particulier au moyen d'un rouleau d'application (6), comprenant une première unité de mesure (7a) pour mesurer une première propriété de l'adhésif appliqué (3) et une unité de commande (8) qui est conçue pour déterminer l'épaisseur de couche (d) de l'adhésif appliqué (3) sur la base de la première propriété mesurée, la surface (2) étant une surface de la pièce usinée (4), la bande de bord (5) ou le rouleau d'application (6).
EP24702106.6A 2023-01-25 2024-01-25 Dispositif et procédé de capture de l'épaisseur d'une couche appliquée et machine de revêtement avec capture de l'épaisseur d'une couche appliquée Pending EP4655110A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023101775.6A DE102023101775A1 (de) 2023-01-25 2023-01-25 Vorrichtung und Verfahren zur Erfassung der Dicke einer aufgetragenen Schicht und Maschine zur Beschichtung mit einer Erfassung der Dicke einer aufgetragenen Schicht
PCT/EP2024/051718 WO2024156786A1 (fr) 2023-01-25 2024-01-25 Dispositif et procédé de capture de l'épaisseur d'une couche appliquée et machine de revêtement avec capture de l'épaisseur d'une couche appliquée

Publications (1)

Publication Number Publication Date
EP4655110A1 true EP4655110A1 (fr) 2025-12-03

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EP24702106.6A Pending EP4655110A1 (fr) 2023-01-25 2024-01-25 Dispositif et procédé de capture de l'épaisseur d'une couche appliquée et machine de revêtement avec capture de l'épaisseur d'une couche appliquée

Country Status (3)

Country Link
EP (1) EP4655110A1 (fr)
DE (1) DE102023101775A1 (fr)
WO (1) WO2024156786A1 (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10236904A1 (de) * 2002-08-12 2004-02-26 Fogra Forschungsgesellschaft Druck Ev Vorrichtung und Verfahren zur Messung und/oder Kontrolle der Dicke einer Lackschicht auf einer rotierenden Walze einer Lackiermaschine
DE10313888A1 (de) * 2003-03-27 2004-10-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Vorrichtung zur online Materialschichtdickenbestimmung
DE102005009262A1 (de) * 2005-02-25 2006-08-31 Syspilot Industrie Consulting Gmbh Verfahren zur Messung der Schichtdicke
DE102005046660B4 (de) * 2005-09-29 2016-02-11 Windmöller & Hölscher Kg Herstellvorrichtung und -verfahren von Säcken oder Sackhalbzeugen umfassend eine Messung von Leimaufträgen
DE102006052587A1 (de) * 2006-11-08 2008-05-15 Mtu Aero Engines Gmbh Vorrichtung und Verfahren zum Messen von Schichtdicken
DE102007049381A1 (de) * 2007-10-15 2009-04-16 Heidelberger Druckmaschinen Ag Vorrichtung zur Kontrolle und Regelung einer aufzubringenden Klebstoffschicht bei der Herstellung von Druckerzeugnissen
DE102017101228B4 (de) * 2017-01-23 2022-12-15 Opti-Run GmbH Verfahren zum Prüfen eines auf einem Substrat aufgetragenen Stranges aus Klebstoff
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
DE102020129553A1 (de) 2020-11-10 2022-05-12 Ima Schelling Deutschland Gmbh Haftmittelauftragsvorrichtung, Kantenanleimmaschine und Verfahren zum Betrieb einer solchen
DE102021103136A1 (de) * 2021-02-10 2022-08-11 Ima Schelling Deutschland Gmbh Vorrichtung zum Beschichten der Schmalseite von plattenförmigen Werkstücken und Verfahren zum Auftragen von Haftmittel
DE102021117813A1 (de) * 2021-07-09 2023-01-12 Homag Gmbh Verfahren zum Beschichten eines Werkstücks, Beschichtungseinrichtung und Computerprogramm zum Einrichten einer Beschichtungseinrichtung

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DE102023101775A1 (de) 2024-07-25
WO2024156786A1 (fr) 2024-08-02

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