WO2024251624A1 - Appareil de décapage et procédés associés pour décaper une partie d'un revêtement sur une fenêtre - Google Patents

Appareil de décapage et procédés associés pour décaper une partie d'un revêtement sur une fenêtre Download PDF

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Publication number
WO2024251624A1
WO2024251624A1 PCT/EP2024/065042 EP2024065042W WO2024251624A1 WO 2024251624 A1 WO2024251624 A1 WO 2024251624A1 EP 2024065042 W EP2024065042 W EP 2024065042W WO 2024251624 A1 WO2024251624 A1 WO 2024251624A1
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WO
WIPO (PCT)
Prior art keywords
decoating
window
laser
laser device
coating system
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
PCT/EP2024/065042
Other languages
English (en)
Inventor
Mohamed OUABBOU
Anthony Koudlanski
Adrien Thomas
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.)
AGC Glass Europe SA
Original Assignee
AGC Glass Europe SA
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 AGC Glass Europe SA filed Critical AGC Glass Europe SA
Publication of WO2024251624A1 publication Critical patent/WO2024251624A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/362—Laser etching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/035—Aligning the laser beam
    • B23K26/037—Aligning the laser beam by pressing on the workpiece, e.g. using a pressing roller foot
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/082—Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/40—Removing material taking account of the properties of the material involved
    • B23K26/402—Removing material taking account of the properties of the material involved involving non-metallic material, e.g. isolators
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
    • C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
    • C03C17/3657—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the multilayer coating having optical properties
    • C03C17/366—Low-emissivity or solar control coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/18—Sheet panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/50—Inorganic materials other than metals or composite materials
    • B23K2103/54—Glass
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2218/00—Methods for coating glass
    • C03C2218/30—Aspects of methods for coating glass not covered above
    • C03C2218/32—After-treatment
    • C03C2218/328—Partly or completely removing a coating

Definitions

  • the present intention relates to a decoating apparatus, designed to decoat a portion of a coating system present on a surface of a window having an external surface with a radius of curvature Rw.
  • the present invention further relates to a decoating method to decoat of a coating system present on a surface of a first window and a portion of a coating system present on a surface of a second window.
  • the invention concerns multiple domains where windows need to be at least partially decoated, meaning removing part of said coating system, to improve the electromagnetic transparency.
  • a standard single-layered window has poor thermal performances. This is why most windows are now built using two or more glass panels separated by a gas and/or polymer-based interlayer. This kind of windows are is called a multiglazed window.
  • a glass panel is low in reflectance for RF radiation.
  • Low in reflectance for RF radiation means that RF radiation are mostly transmitted through the material where high in reflectance for RF radiation means that RF radiation are mostly reflected on the surface of the material and/or absorbed by the material and the attenuation is at level of 20 decibels (dB) or more.
  • Low in reflectance means an attenuation at level of 10 decibels (dB) or less.
  • a coating system is typically applied on the interface of one or several glass panels of a multi-glazed window in order to further improve the multiglazed window properties.
  • This coating system can either improve the multi-glazed window insulation, reduce the amount of infrared and/or ultraviolet radiation entering the multi-glazed window and/or keep the sun’s heat out of a space wherein such multi-glazed window insulation is used.
  • this type of coating systems is generally metal-based and therefore acts as a Faraday cage, preventing electromagnetic waves such as radio waves, from entering or leaving the space and then is high in reflectance for RF radiation.
  • the coating system is high in reflectance meaning that the coating system is low in transmittance for RF radiation.
  • Low in transmittance means a transmission with an attenuation at level of 20 decibels (dB) or more. It is understood that the dielectric substrate is low in reflectance, meaning an attenuation at level of 10 decibels (dB) or less.
  • a window is mounted in situ meaning that the window is mounted on a stationary object, for instance a building, or mounted on a mobile object, for instance a vehicle, a rapid transit system such as a train, tram or alike to close an opening in the stationary or the mobile object, windows are removed from the opening to treat their surfaces.
  • a rapid transit system such as a train, tram or alike to close an opening in the stationary or the mobile object
  • a treatment can be a laser scribing or like, or preferably a decoating of a coating system.
  • a laser decoating system to remove at least one portion of the coating system.
  • the total surface to be decoated is typically between 1 and 3% of the total coating system surface, in order to both improve the transmission of radio waves through the multi-glazed-window without impairing the properties of said coating system.
  • the decoating system will remove segments from the coating system and the sum of the longest sub-segment of each segment is equal to n A /2 wherein n is a positive integer greater than zero and lambda ( A ) is the wavelength of the radio wave. It is necessary to have a wide band frequency selective surface in order to ensure the transmission of waves of different frequencies through the multi-glazed window, typically between 2GHz and lOOGhz.
  • the decoating system can be configured to remove a segment of a length greater than 400 mm and a width between 10 and 100 pm.
  • said laser is always focused on a single point and cannot be adapted.
  • this apparatus is only built to have a focal point in a specific surface and thus such apparatus are built for a single type of double-glazed window being two glass panels separated by a spacer creating a space filled with gas, where the coating system is positioned on the internal interface of the window.
  • this apparatus it is not possible to use this apparatus to other types of windows where the glass thickness is different or where the coating system is applied on a different interface.
  • apparatus of the prior art cannot be aligned perpendicularly to the coating system to be treated causing a problem with the quality of the decoating.
  • apparatus of the prior art are fixed to the window (or around) via suction pads, thus the parallelism in not possible with tolerances of the pads and the whole apparatus on top of the possible misalignment of the window or the curvature of said window. Then, misalignment needs to be calculated for each window once the apparatus is installed taking time, handling issues, •••
  • the decoating apparatus can comprises a body on which the articulated arm is fixed.
  • Said body can comprise an calculation unit to calculate and to control movements of the articulated arm, a generator unit to generate a laser light and to control the laser device and a management unit to manage the calculation unit and the generator unit.
  • the decoating apparatus can further comprise a control unit to interact with the articulating arm and the laser device to be able to move the laser device in space while the laser beam is decoating.
  • the control unit can drive the generator unit to adapt the power, the frequency of the laser light.
  • the control unit can also drive the calculation unit to articulate the articulated arm to move and orientate the laser device, especially the laser beam substantially normal to the surface of the window, to the desired position.
  • the control unit can also drive the optical laser unit to focalise the laser beam and/or to adapt the scanning surface of the laser beam.
  • the decoating apparatus further comprises at least a battery and an inverter to avoid to turn off and restart the decoating apparatus during the displacement between two windows.
  • the articulated arm is designed to displace and orientate the laser device, especially the laser beam substantially normal to the surface of the window, while avoiding to fix a part of the decoating apparatus on the window or on the frame, wall,--- to avoid risks of not be correctly attached and fall or risks to scratch the surface.
  • the articulated arm delocalises the laser device from the body of the decoating device.
  • the articulated arm comprises at least an articulation to displace the laser device in the space.
  • each of the rotation components is driven and controlled by the calculation unit.
  • the articulated arm is designed as a type of mechanical arm that is used for positioning precisely the laser device according to the window shape and geometry and the surface to decoat.
  • the arm may be the sum total of the mechanism allowing either rotational motion or translational displacement of the laser device.
  • These movements are usually programmed, but can be performed by remotely controlling the articulated arm (for instance via a remote, or computer, or tablet), or by piloting the articulated arm via the control panel of the equipment, or by manually moving the laser equipment along the desired movement to let the control unit of the articulated arm acquire this movement, to then repeat it.
  • the articulated arm can allow the laser device to be moved along the 3 axis (cartesian coordinates: X, Y, Z: 1 vertical axis and 2 horizontal one, perpendicular to each other) or rotate around these 3 axis, allowing all 6 degrees of movements, such as all translation and rotation possible in or around each direction, so the amount of articulations of the articulated arm have to be sufficient to allow such movements.
  • Amount of articulations is preferably more than 2, more preferably around 6.
  • the decoating apparatus comprises a laser device 5.
  • the laser device is mounted on an end of the articulated arm.
  • the decoating apparatus comprises a body
  • the articulated arm the laser device is mounted on the end opposite to the end fixed to the body. The articulated arm allows the laser device to be moved and oriented in space to decoat correctly the coating system to be decoated.
  • the length of the laser device of about 180 mm to be able to facilitate the positioning and the movement of the laser device by the articulated arm.
  • the width of the laser device of about 180 mm to be able to facilitate the positioning and the movement of the laser device by the articulated arm.
  • the height of the laser device of about 180 mm to be able to facilitate the positioning and the movement of the laser device by the articulated arm.
  • the dimensions of the laser device can be different such as 100 x 100 x 100 mm depending on the elements comprised inside the laser device and the desired application.
  • the dimensions of the laser device can be different such as 200 x 200 x 200 mm depending on the elements comprised inside the laser device and the desired application.
  • the weight of the laser device is preferably equal to or smaller than about 5 kg to limit the vibration of the articulated arm while avoiding to over dimension said articulated arm while limiting the destabilization risks and jerky movements.
  • the laser device 5 comprises an optical laser unit to generate a laser beam 51 from the laser light generated by the generator unit.
  • the laser light is transmitted from the generator unit, disposed in the body to the optical laser unit of the laser device by a cable 405.
  • the laser beam is focalised at a focus point on the coating system to decoat when the decoating apparatus is ready to decoat.
  • the laser beam has a specific direction.
  • said decoating device can comprise a lens array configured to focus said laser beam at a focus distance.
  • the articulated arm allows the laser beam to be substantially normal to the surface of the window at least during the decoating step.
  • the term “normal to the surface” is measured when the laser beam is in the zero position 590.
  • the zero position 590 is in front of the laser beam when the laser beam is not orientable.
  • the zero position is the (0, 0) point of the scanning area in case of the laser beam can be oriented with an orientation means.
  • the scanning area 59 is defined in positive and negative value centred in the zero position as illustrated in FIG. 3.
  • the articulated arm is able to displace and to orientate the laser device to keep this specific direction of the laser beam.
  • the laser head can be orientate in a XI, Yl, Zl axis, especially the laser beam substantially normal at the position zero 590 to the surface of the window.
  • the laser device can further comprise an orientation means configured to control the direction of said laser beam 51.
  • the laser beam scans the portion to be decoated thanks to this orientation means.
  • said orientation means may comprise at least a rotatable mirror or a mirror using a galvanometer based motor, to provide a light and fast orientation of the laser beam and to control and manage such orientation.
  • the laser beam generated by the generator unit goes through an optical fibre from the body to the laser device.
  • the laser beam is transformed and shot by the laser device in direction of the surface to decoat.
  • the transformation of the laser beam can be based on reflections by at least one mirror (or more) to go into a Control Unit Adapter (CUA), from where the laser beam can be then emitted toward the glass panel with correct size and shape, and angle and thickness, to remove the coating according to the predetermined pattern.
  • CUA Control Unit Adapter
  • the invention permits to very fast remove a large portion of a coating system, for instance to improve the electromagnetic transmission of a window.
  • the laser apparatus comprises a F-theta lens to flatten the focus point on a surface.
  • the laser apparatus is a pulse laser apparatus and the frequency of the laser beam equals to or is higher than substantially 20kHz.
  • the laser device in order to keep the focal point on the coating system, can comprises a focal device designed to measure the distance between the coating system and the laser device. Measurements are transmitted to the management unit that can drive the laser device and/or the calculation unit and/or a control unit to adapt the focal point on the coating system.
  • the laser device can comprise a housing to hide and to protect components.
  • the housing comprises an opening in which the laser beam can go out of the laser device.
  • the laser device can further comprise mirror or set of mirrors to aim and redirect laser beam in the correct direction
  • the laser device can further comprise an inclinometer to aim the laser device and the laser beam in the correct direction.
  • the laser device can further comprise a camera to control the decoating pattern and a light to provide good luminosity to camera.
  • the decoating apparatus can further comprise a protective panel to protect peoples from laser reflected from glass. ⁇ contact element>
  • the laser device 5 comprises a contact element 52.
  • the contact element is designed to be positioned between the laser device 5 and a window 2 to treat as illustrated in FIG. 3.
  • the contact element can comprise an external surface having a radius of curvature Re.
  • the external surface is concave meaning an inwardly rounded shape.
  • the radius of curvature, Re, of the external surface of the contact element can be smaller than or equal to the radius of curvature, Rw, of the external surface of the window in front of the portion (Re ⁇ Rw).
  • the contact element can comprises at least at least three fingers to separate the external surface 523 of the contact element with the laser device from a defined distance from the external surface of the window.
  • Each of the at least three fingers has a free end 524 and each of the free end is designed to be in contact with an external surface of the window.
  • the plane defined by the free ends is substantially perpendicular to the laser beam at the zero position (590).
  • the contact between any of the at least three free ends and a surface of the window defines a specific contact surface.
  • the contact surface is smaller than or equal to about 78 mm 2 with a diameter about 10 mm, more preferably the contact surface has a diameter smaller than or equal to 1 mm.
  • the free end is enough rigid to not be deformed during a contact and the contact surface is substantially a contact point.
  • the contact element can comprise a fixing part 521.
  • the fixing member 521 is designed to be fixed on the laser device and around the opening in which the laser beam is going out of the laser device.
  • the contact element can be part of the skeleton or directly fixed to the skeleton of the laser device.
  • any known manner can be used such as screwing, welding, riveting, chemical bonding, whether removable or permanent depending on the desired application.
  • each of the free ends can be made of a soften material than the material of each of the at least three fingers.
  • the soften material is designed to prevent scratch or other damage that physical contact of the device could create on the window to be decoated.
  • the material could be rubber, resin, Teflon, Ertalon, or any other material suitable to prevent scratch or other damage that physical contact could create.
  • the contact element can comprises at least three fingers as illustrated in FIG. 5. In some other embodiments, the contact elements can comprises at least four fingers as illustrated in FIG. 4.
  • the spacer permits to define a distance between the laser device and the external surface while giving a rigidity to the contact element. The number of fingers is not limited and depends on the specific application.
  • the laser head comprises three fingers to create physical contact in 3 points disposed in triangle, thus creating a plane to disposed in the correct position the laser head and especially the laser beam correctly independently to any curvature of the window.
  • the length of each of the at least three fingers can be different.
  • the length of each of the at least three fingers can be substantially equals to keep the coplanar between the laser head and the scanning area.
  • the contact element is made of a rigid material.
  • the rigid material would preferably be metal based material, for instance aluminium to limit the total weight of the device or plastic based material such as PC or ABS or PA or any other material suitable to keep the physical stability of a fixing member.
  • the contact element can have a fastening means to removable fasten the external member to the contact element.
  • the contact element can be not in contact with the surface of the window during the decoating step. That means that when the articulated arm displaces the laser head along the window, the contact element can be at a certain distance, different than zero, from the glass to avoid friction, scratches, •••
  • the contact element cannot be considered as a vacuum pad.
  • the contact element is made to establish a parallelism between the laser head and the surface of the glazing panel; a vacuum pad is made to fix an object on a window and by definition cannot permit any movement of the laser head.
  • the shape of the at least three fingers is not limited and depends on the desired application.
  • the shape, without the free end can be a cylinder, a parallelepiped rectangle as long as the at least three fingers extends from the laser head to the window.
  • each of the free ends has a semicircular shape as illustrated in figures.
  • each of the at least three fingers depends on the application, about 50 mm can be a good length to manipulate correctly the laser head and the let enough space between the laser head and the window.
  • the term “decoat” means to modify the continuity of the coating system by removing or by melting for example.
  • the decoating can be a partial decoating.
  • the coating system 23 generally uses a metal-based layer and infrared light is highly refracted by this type of layer. Such coating system is typically used to achieve a low-energy multi-glazed window.
  • the coating system can be a heatable coating applied on the multi-glazed window to add a defrosting and/or a demisting function for example and/or to reduce the accumulation of heat in the interior of a building or vehicle or to keep the heat inside during cold periods for example.
  • coating system are thin and mainly transparent to eyes.
  • the coating system is covering most of the surface of the multiglazed window 2.
  • the coating system can be made of layers of different materials and at least one of these layers is electrically conductive.
  • the coating system can be electrically conductive over the majority of one major surface of the multi-glazed window. This can causes issues such as heated point if the portion to be decoating is not well designed.
  • each functional layer is deposited, for example, by means of vacuum deposition techniques such as magnetic field-assisted cathodic sputtering, more commonly referred to as “magnetron sputtering".
  • each functional layer may be protected by barrier layers or improved by deposition on a wetting layer.
  • the position of the decoated portion 25 on the multi-glazed window depends on the application.
  • the portion of the coating system to be decoated represents at least 50% of the surface of the coating system, more preferably, the portion of the coating system to be decoated represents at least 70% of the surface of the coating system and even more preferably, the portion of the coating system to be decoated represents at least 80% of the surface of the coating system. It is understood that the portion of the coating system to be decoated and the decoated portion represent a surface of the coating system and not the decoating itself.
  • the present invention permits to decoat a small amount of coating, less than 3%, to improve the transmission of radio waves on a large or not portion of said coating.
  • the frequency selective surface FSS1 can be composed of at least a patchwork of sub-frequency selective surfaces FSS11, FSS12, FSS13, FSS14, FSS21, FSS22, FSS23, FSS24, FSS31, FSS32, FSS33, FSS34 as illustrated in FIG. 10, Therefore, when laser processing is performed on a region larger than a region that can be processed in one process, a pattern formed in a predetermined size that can be processed in one process is formed a plurality of times and continuously arranged. As a result, a continuous pattern can be formed in the entire desired region by connecting decoated tile-like portions like a so-called patchwork.
  • the decoating step 420 can comprises several decoating substeps 421, 422, 423, 424.
  • Each of the decoating substeps can be performed by scanning a zone, scanning either via an optical or ultrasonic means for instance, to define the correct shape to the surface to decoat with enough precision, with the laser beam to decoat inside said zone meaning that the orientation of the laser beam is adapted inside said zone.
  • the laser device is moving with the articulated arm while the laser beam is scanning to increase the speed of decoating.
  • the laser device can comprises a confocal or any other element designed to scan the surface in front of where the laser beam will be shot, to adjust laser beam position accordingly.
  • the frequency selective surface is a grid made of decoated segments to form a decoated grid.
  • the grid can be made of a patchwork of subgrids each of the subgrids are connected edge-to-edge.
  • the decoated grids placed in a patchwork manner and connected edge-to-edge allow to create a larger frequency selective surface especially when the decoated grids are created by a decoating apparatus using a galvo head to orientate the laser designed to decoat the coating system.
  • Lml, Lm2, Lm3, Lm4, W3n, W2n, Win of the sub frequency selective surfaces can depends on the size of the maximum surface that the decoating apparatus can decoat at once and also can depends on the radius of curvature around the focal point and the laser parameter such as the scan field, Lmax, and the zone Rayleigh, Za.
  • the laser beam is focalised at a focus point 25 on the coating system 23.
  • the laser device is moving while the laser beam is focalised on the coating system to decoat the coating system.
  • the laser beam In order to correctly decoat a coating system, the laser beam must be precisely focused onto the targeted coating system. Therefore, the position of the coating system must be known with a precision at least three times smaller than the depth of field of the decoating device.
  • the depth of field corresponds to the distance around the focal point of a focused laser beam where the laser beam diameter is considered constant. This distance depends greatly of the laser beam characteristics and the optics used for focusing said laser beam. Typically, the depth of field is around 0.5 mm, which means that the precision on the focus position of the decoating device should be around 0.1-0.2 mm.
  • a cofoncal unit can be added to the laser device designed to calculate the position of the coating system.
  • the decoating method is performed in a factory meaning before to install the treated window.
  • the decoating method is performed in situ with the decoating apparatus.
  • a rapid transit system 100 comprises several windows 201, 202, 203, 204 in a same row or in several rows as illustrated in FIG. 6.
  • the decoating method according to the invention permits to perform the decoating method from the inside of the stationary or the mobile object as illustrated in FIG. 6.
  • the decoating apparatus is position on the floor or on a platform to be correctly positioned.
  • the displacing step can be made by the platform once the decoating apparatus is positioned on the platform.
  • the contact element can be not against the surface of the window during the decoating step B2 to avoid friction, scratches, •••
  • the contact element has to be against the surface for the positioning step not for the decoating step. In any case, the contact element permits to the laser head to move along the glazing panel.
  • the contact element cannot be considered as a vacuum pad.
  • the contact element is made to establish a parallelism between the laser head and the surface of the glazing panel; a vacuum pad is made to fix an object on a window and by definition cannot permit any movement of the laser head.
  • the decoating method according to the invention permits to perform the decoating method from the inside of the stationary or the mobile object as illustrated in FIG. 7.
  • the decoating apparatus is moved inside the rapid transit system and positioned near a window to be treated.
  • the present invention also relates to a multi windows decoating method to decoat a portion of a coating system present on a surface of each of at least a first window and a second window mounted on a stationary object, for instance a building, or mounted on a mobile object, for instance a vehicle, a rapid transit system to treat multiple windows.
  • the multi windows decoating method comprises a step A of placing 402 a decoating apparatus according to the first aspect near the first window.
  • the decoating apparatus is placed in front of the window to be treated.
  • the term “near” means that the decoating apparatus is not fixed to the windows, the frame or the body of the object on which the window is fixed.
  • the body can be around 70cm from the window to be decoated, preferably placed substantially normal to the window, and with the articulated arm aligned substantially along the main length of the body, or parallelly to the window, with the articulated arm aligned substantially perpendicular to the main body length.
  • the centre of the articulated arm which corresponds to the first articulation between the body and the articulated arm, is placed aligned with the centre of the window, the centre along vertical axis, and along the length axis of the window).
  • the vertical positioning of the body from the window could be ensured by lifting the body with a lifting equipment, for example a lifting platform, scissor lift platform, “cherry picker” or so on.
  • a lifting equipment for example a lifting platform, scissor lift platform, “cherry picker” or so on.
  • the articulated arm displaces and orientates the laser device along the portion and keeps the laser beam substantially normal to the surface or to the scanning zone.
  • the multi windows decoating method comprises a step B of decoating the first window according to the decoating method of the second aspect of the present invention.
  • the multi windows decoating method further comprises a step C of repeating the stap A and step B for the second window.
  • the multi windows decoating method can comprises a step of moving 403 the decoating apparatus to another location to decoat another window or another row of windows or to be stored. As illustrated in FIG. 6, the decoating apparatus can decoat a first row of windows 201, 202, 203, 204, 205 and then (or the contrary) decoat a second row of windows 211, 212, 213, 214, 215.
  • the multi window decoating method can comprise a step 401 before the step Bl to assemble and/or to provide the decoating apparatus inside or outside the object.
  • the multi window decoating method can also comprise a step 404 after all decoating steps to disassemble and/or to retrieve from the object the decoating apparatus.
  • the invention also relates to the use a contact element of a laser device comprised in a decoating apparatus according to the first aspect to correctly position the laser device substantially parallel to a window to be decoated while ensuring the uniform quality of the decoating over a portion of a coating system present on a surface of the window.
  • the decoating apparatus of the invention can be used to improve the electromagnetic properties of a multi-glazed window already mounted on a stationary object, for instance building, or on a mobile object, for instance a vehicle, a train or alike without dependency to the configuration of the object.
  • the present invention can decoat a window without manipulations from an operator except maybe some standard manipulations such as the on-off and the first positioning.
  • the laser device and the focal point of the laser beam can move following the profile/geometry of the coating system, whether the window is straight, curved, tilted...

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surface Treatment Of Glass (AREA)

Abstract

La présente invention divulgue un appareil de décapage (1), conçu pour décaper une partie d'un système de revêtement (23) présent sur une surface d'une fenêtre (2) ayant une surface externe (21) dotée d'un rayon de courbure Rw. L'appareil de décapage (1) comprend un bras articulé (3), un dispositif laser (5) comprenant une unité laser optique pour générer un faisceau laser, et monté sur une extrémité du bras articulé (3) conçu pour déplacer et orienter le dispositif laser (5), en particulier le faisceau laser sensiblement perpendiculaire à la surface (21) de la fenêtre (2). Le dispositif laser (5) comprend un élément de contact (52) positionné entre la tête laser (5) et la fenêtre (2). L'élément de contact (52) est conçu pour être en contact avec une surface externe (21) de la fenêtre (2). La présente invention concerne également des procédés de décapage utilisant ledit appareil de décapage (1), et l'utilisation d'un élément de contact dudit dispositif laser.
PCT/EP2024/065042 2023-06-08 2024-05-31 Appareil de décapage et procédés associés pour décaper une partie d'un revêtement sur une fenêtre Pending WO2024251624A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP23178252.5 2023-06-08
EP23178252 2023-06-08

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WO2024251624A1 true WO2024251624A1 (fr) 2024-12-12

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PCT/EP2024/065042 Pending WO2024251624A1 (fr) 2023-06-08 2024-05-31 Appareil de décapage et procédés associés pour décaper une partie d'un revêtement sur une fenêtre

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6559411B2 (en) 2001-08-10 2003-05-06 First Solar, Llc Method and apparatus for laser scribing glass sheet substrate coatings
US20110259857A1 (en) * 2010-04-23 2011-10-27 Johnson Jeffrey D Rotating laser welding pressure unit
WO2015050762A1 (fr) 2013-10-02 2015-04-09 Eritek, Inc. Procédé et appareil d'amélioration de la transmission des signaux radiofréquence au travers de verre revêtu à faible émissivité
WO2021239597A1 (fr) * 2020-05-26 2021-12-02 Agc Glass Europe Appareil et procédé d'élimination d'au moins une partie d'au moins un système de revêtement présent dans une fenêtre à vitres multiples montée sur un objet fixe ou mobile

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6559411B2 (en) 2001-08-10 2003-05-06 First Solar, Llc Method and apparatus for laser scribing glass sheet substrate coatings
US20110259857A1 (en) * 2010-04-23 2011-10-27 Johnson Jeffrey D Rotating laser welding pressure unit
WO2015050762A1 (fr) 2013-10-02 2015-04-09 Eritek, Inc. Procédé et appareil d'amélioration de la transmission des signaux radiofréquence au travers de verre revêtu à faible émissivité
US20180036839A1 (en) * 2013-10-02 2018-02-08 Clearbeam, Inc. Low-emissivity coated glass for improving radio frequency signal transmission
WO2021239597A1 (fr) * 2020-05-26 2021-12-02 Agc Glass Europe Appareil et procédé d'élimination d'au moins une partie d'au moins un système de revêtement présent dans une fenêtre à vitres multiples montée sur un objet fixe ou mobile

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