Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D7/08—Means for treating work or cutting member to facilitate cutting
• • 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
  • C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
  • C03C17/32—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material with synthetic or natural resins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D7/08—Means for treating work or cutting member to facilitate cutting
  • B26D7/086—Means for treating work or cutting member to facilitate cutting by vibrating, e.g. ultrasonically
• • 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
  • C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
• • 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
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T83/00—Cutting
  • Y10T83/02—Other than completely through work thickness
  • Y10T83/0267—Splitting
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T83/00—Cutting
  • Y10T83/04—Processes
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T83/00—Cutting
  • Y10T83/869—Means to drive or to guide tool
  • Y10T83/8821—With simple rectilinear reciprocating motion only
  • Y10T83/8827—Means to vary force on, or speed of, tool during stroke

Definitions

• the present invention relates to a method for cutting a functional plastic film, applied to a substrate, this cutting having to be carried out without damaging said substrate.
• the term “functional film” mainly means protective films, which may at the same time be decorative films, films comprising information such as assembly and maintenance instructions and / or advertising information and mechanical reinforcement films. These films are peelable, being maintained on the substrate by an electrostatic effect or because they are adhesive-coated at least on part of their surface. It could however be envisaged that part of the film is not peelable, the film having to be kept permanently on the substrate in this part.
• the present invention relates in particular to the protection by filming of surfaces of plate-type substrates, in particular glass plates, for example intended for glazing, so as not to damage them by shock, scratches, etc. during their transport from the production site to a site of use or assembly, as well as during said assembly where the plate must be partly uncovered, the protection by the film on the remaining part must be able to be maintained as long as possible.
• the glazing handled, delivered to building sites, mounted in window frames remains subject to soiling and damage on building sites, including soiling by plaster, plasters, sealants, paints, fingerprints, ... which may be applied after the glazing has been put in place.
• the glazing may be conventional glazing, with an untreated surface, but there are more and more frequently glazing whose surface has been coated with at least one functional thin layer, of at least one metal oxide for example, such as a layer based on Ti0 2 , making the glazing self-cleaning (Bioclean glazing of the Depositing Company).
• Such glazing is then not only sensitive to the dirt mentioned above, but also sensitive to pollution by certain sealants, in particular those incorporating certain silicones, and to the vapors of these sealants, such pollution temporarily, or even definitively annihilating the auto-function. cleaning these layers and requiring cleaning to restore their effectiveness.
• a peelable protective film is applied to them, as indicated above, which must be maintained until the end of the work, that is to say even after installing the glazing.
• the film is generally removed at the edges to allow the adhesion of the sealant or the sealing contact of a seal on the glass, but the film must be kept on the “visible” part of the glass, the user should not removing it by peeling only at the end of the work.
• the Depositing Company sought a solution to the problem of protecting a plate-type substrate while allowing different parts of film, peelable, to be removed at different times (in the case of a window pane, removal of the border strips during installation, the part of the film covering the "clear view” being removed only later), the substrate retaining its integrity at all times.
• the proposed solution consists in cutting the film by ultrasound under conditions which do not damage the substrate and the possible layers which it carries.
• the present invention therefore relates to a method of cutting a functional plastic film, in particular a protective film, in the applied state on a hard substrate, such as a glass plate, characterized by the fact that said cutting is carried out using an ultrasonic cutting device with a sonotrode head, the characteristics and parameters of which have been selected so that the cutting is only carried out in the thickness of the functional film, leaving the underlying substrate intact.
• the hard substrate and the plastic film are materials having a different behavior vis-à-vis ultrasounds which allow cutting of the soft material without risk of degrading the hard material, insofar as the parameters required to cut the glass would be very clearly different.
• an ultrasonic cutting device is used which has a head intended to penetrate into the functional film, which has an end portion in the general shape of an angle tip at the apex at least equal to 30 °, for example d 'angle at the top of the order of 70 °. Using a head like this ("no sharp ”), avoiding too strong a focusing of the energy on an acute point.
• a head having the general shape of a blade, the end of which is rounded in the mean plane of the blade and has said end portion pointed in the plane perpendicular to the mean plane of the blade.
• Such a head is shown schematically in Figure 3 of the accompanying drawing, where the left part is a view along the mean plane of the blade and the right part along the plane perpendicular to the previous one. This so-called "half-round" shape has proved to be interesting because it allows better evacuation of the cutting residues.
• a head having the shape of a cone, the apex angle of which is at least equal to 30 °, being in particular of the order of 70 °, the end of said cone being capable of being rounded, semi-spherical or have the shape of a cone of greater angle than the previous one, having an angle generally greater than 110 °, being in particular of the order of 130 °.
• a head is shown schematically in Figure 4 of the accompanying drawing.
• a sonotrode head made of a material chosen in particular from steel, titanium and aluminum is used, said material having where appropriate received at least one surface treatment, such as a polishing, having in particular the aim of ensuring lubrication and sliding or the formation of a particular surface condition, and / or at least a layer deposition.
• Materials such as diamond and tungsten carbide are generally not recommended, as is any other material that would be recommended for cutting glass; however, there could be particular applications in which these materials would still be considered.
• An ultrasound system is used with a power advantageously less than 1000 Watts, in particular less than 500 Watts, preferably 100-300
• the cutting is carried out with a pressure of the head on the substrate coated with the protective film advantageously ranging from a value corresponding to the tool placed on said coated substrate up to a value of 2 bars, in particular ranging from 0.5 to 2 bars.
• the cutting is advantageously carried out with a relative displacement of the substrate coated with the functional film and of the head of at most 120 meters / min., In particular from 30 to 100 meters / min.
• the substrate generally consists of a plate, flat or with curved or curved faces, of monolithic or laminated glass, or of a hard plastic material such as polycarbonate, said plates having if necessary received at least one treatment on at least one face, for example by applying a functional layer, such as an anti-fouling layer, an anti-rain layer, an anti-reflection layer, an anti-scratch layer, an anti-solar layer.
• a functional layer such as an anti-fouling layer, an anti-rain layer, an anti-reflection layer, an anti-scratch layer, an anti-solar layer.
• the glass plates are in particular intended to form the windows of buildings or of automobiles or of automobile windshields.
• the functional film is made of a plastic material chosen from polyolefins such as low density, medium density and high density polyethylenes and their mixtures, and polypropylene, poly (vinyl chlorides) and pol (ethylene terephthalate), optionally coated with an adhesive layer acrylic. Mention may also be made of acrylic films.
• the functional film can also be formed from several layers, each of which is formed in particular from a plastic material chosen from those which have just been indicated or is an acrylic layer.
• the films used are advantageously non-polluting, withstanding weathering and / or UN.
• the functional film which can be applied at least on a portion of the substrate in double thickness, advantageously has an overall thickness between 20 and 200 ⁇ m, in particular between 80 and 160 ⁇ m.
• the substrate consists of a glazing, such as a self-cleaning glazing, coated for this purpose with a layer of metal oxide such as Ti0 2 , a cut can be made which leaves the film on the part principal of the window corresponding to the clear view, and which allows the film to be removed from the regions of the edges of the glazing, said edges being intended to be introduced into the rebates of the frames and to be hidden from view by glazing beads.
• a cut can be made which leaves the film on the part principal of the window corresponding to the clear view, and which allows the film to be removed from the regions of the edges of the glazing, said edges being intended to be introduced into the rebates of the frames and to be hidden from view by glazing beads.
• the substrate consists of a glass plate
• the subject of the present invention is a method for protecting at least one face of a plate-type substrate during its transport from the production site to a site of use or mounting as well as during handling during mounting, at least one region of the surface of the substrate must be able to be uncovered during mounting handling, the protection having to be maintained at least temporarily on the remaining region or regions, characterized by the fact that a protective plastic film is deposited on the whole of each face to be protected from the substrate for transport, and that, to allow the film to be removed in the region or regions to be uncovered, performs ultrasonic cutting of said protective film along the contour of said region or regions, in particular by the method as defined above using an ultrasonic cutting device, the characteristics and operating parameters of which have been selected so that the cut is made only in the thickness of the protective film, leaving the underlying substrate intact.
• the present invention also relates to substrates such as glass plates intended to form glazing, motor vehicle windows, windshields, coated with a functional film, said film comprising a cutout which has been produced by ultrasound. through its thickness without the underlying substrate having been damaged, the cut part or parts having or not been removed.
• the present invention relates to an apparatus for implementing the ultrasonic cutting method as defined above, said apparatus being automatic, semi-automatic or consisting of a portable tool, and comprising a cutting device. by ultrasound, as defined above. It is possible in particular to use, as an apparatus for implementing the ultrasonic cutting process, a glass cutting table on which has been adapted a device for cutting the film by ultrasound, said ultrasonic cutting device.
• FIG. 1 and 2 of the accompanying drawing schematically represent a cutting device according to the invention, respectively in side view and in top view, and Figures 3 and 4 each illustrate an example of a head intended to equip the ultra- sounds of the device of Figures 1 and 2.
• the reference figures appearing in Figures 1 and 2 have the following meanings: I.
• An edge wedge 1 is applied along the border of the substrate 6, opposite the support plate 4.
• the distance from the latter relative to the border is adjusted using adjustment screws 2 passing through two adjustment supports 3 carried by the wedge 1 in the vicinity of its ends and applied to the support plate 4.
• the ultrasound system comprises a handle 10, the user moving the assembly along the edge of the substrate grasping the handle 8 with one hand and the handle 10 with the other, having started the ultrasound system by pressing the trigger 11.
• the cutting of the functional film is then carried out along a line parallel to the edge of the substrate 6.

Landscapes

• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• General Chemical & Material Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• Forests & Forestry (AREA)
• Mechanical Engineering (AREA)
• Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
• Surface Treatment Of Glass (AREA)
• Laminated Bodies (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2003
  • 2003-07-17 FR FR0350342A patent/FR2857614B1/fr not_active Expired - Fee Related
• 2004
  • 2004-07-13 KR KR1020067001047A patent/KR20060034710A/ko not_active Application Discontinuation
  • 2004-07-13 CN CNA2004800206668A patent/CN1822929A/zh active Pending
  • 2004-07-13 BR BRPI0412490 patent/BRPI0412490A/pt not_active IP Right Cessation
  • 2004-07-13 CA CA002532746A patent/CA2532746A1/fr not_active Abandoned
  • 2004-07-13 AU AU2004265112A patent/AU2004265112A1/en not_active Abandoned
  • 2004-07-13 JP JP2006519957A patent/JP2007516090A/ja active Pending
  • 2004-07-13 US US10/564,524 patent/US20070022851A1/en not_active Abandoned
  • 2004-07-13 EP EP04767672A patent/EP1648667A1/de not_active Withdrawn
  • 2004-07-13 WO PCT/FR2004/001842 patent/WO2005016604A1/fr active Application Filing
  • 2004-07-13 MX MXPA06000640A patent/MXPA06000640A/es unknown
• 2006
  • 2006-01-30 ZA ZA200600844A patent/ZA200600844B/en unknown

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