WO2016156234A1 - Verfahren und vorrichtung zum kontinuierlichen trennen von glas - Google Patents
Verfahren und vorrichtung zum kontinuierlichen trennen von glas Download PDFInfo
- Publication number
- WO2016156234A1 WO2016156234A1 PCT/EP2016/056612 EP2016056612W WO2016156234A1 WO 2016156234 A1 WO2016156234 A1 WO 2016156234A1 EP 2016056612 W EP2016056612 W EP 2016056612W WO 2016156234 A1 WO2016156234 A1 WO 2016156234A1
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- WO
- WIPO (PCT)
- Prior art keywords
- glass
- thin glass
- dividing line
- impact
- thin
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/09—Severing cooled glass by thermal shock
- C03B33/091—Severing cooled glass by thermal shock using at least one focussed radiation beam, e.g. laser beam
- C03B33/093—Severing cooled glass by thermal shock using at least one focussed radiation beam, e.g. laser beam using two or more focussed radiation beams
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
- C03B33/0235—Ribbons
-
- 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
- B23K26/0006—Working by laser beam, e.g. welding, cutting or boring taking account of the properties of the material involved
-
- 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
- B23K26/083—Devices involving movement of the workpiece in at least one axial direction
-
- 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
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/146—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor the fluid stream containing a liquid
-
- 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
- B23K26/18—Working by laser beam, e.g. welding, cutting or boring using absorbing layers on the workpiece, e.g. for marking or protecting purposes
-
- 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
- B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
- B23K26/356—Working by laser beam, e.g. welding, cutting or boring for surface treatment by shock processing
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
- C03B33/03—Glass cutting tables; Apparatus for transporting or handling sheet glass during the cutting or breaking operations
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/09—Severing cooled glass by thermal shock
- C03B33/091—Severing cooled glass by thermal shock using at least one focussed radiation beam, e.g. laser beam
Definitions
- the invention generally relates to the cutting of glass.
- the invention relates to the cutting of glass by stress risers.
- Retraction of a glass ribbon from a preform or drawing from a melt typically form edge regions thickened at the edge of the glass ribbon
- WO 2011/026074 A1 describes a method for inserting a slit into a glass substrate.
- a laser beam is directed to damage and moved across the glass surface.
- a jet of fluid is directed directly at the laser spot on the glass surface so that the glass is cooled even before the temperature generated by the laser beam is completely equilibrated by the thickness of the glass substrate.
- the thermal stress is limited to a part of the thickness of the
- Glass substrate Glass edges produced by laser-induced stress cracking typically have no or very few damage, especially at the corners of the edge profile. Now the strength of a glass and its
- edges made with laser-induced tension riser should inherently have a high strength and thus produced
- Breaking strength which however varies greatly from sample to sample, can be a higher
- C0 2 lasers are preferably used. The procedure was originally for the
- Stress crack causes necessary heat energy to generate the voltage gradient only via the power of the heat source above the surface of the beam geometry into the glass. So far, this is done by means of a specific beam geometry, as well as an adjustable and variable power density. Due to the two-dimensional extent of the laser spot on the surface of the glass, on which almost the entire power of the laser is absorbed, there are no sharp temperature gradients. These are more or less diffuse depending on local power density and thermal conductivity. This can then lead to the fact that the drive of the stress crack does not take place exactly on the intended track. The same applies in the opposite case also for the targeted cooling of the glass surface.
- the invention is therefore based on the object, the
- Laying voltage gradients in the plane of the glass, according to the invention at least one energy source with a Einwirkfeld or a Einwirkzone provided.
- the glass to be cut thus absorbs the energy and is heated very quickly due to its small thickness.
- the heat conduction begins in the volume of
- a method for separating thin glass with a thickness of less than 1.2 mm, preferably with a thickness in the range of 5 ⁇ m to 150 ⁇ m, is provided, in which the thin glass is separated by a dividing line
- the Einwirkfeld is moved along the parting line on the thin glass, so that by the temperature gradient of the heated by the at least one energy source glass to the surrounding glass, a mechanical stress is generated in the glass, through which propagates a crack of the mechanical stress along the dividing line, and wherein two portions of the Einwirkfeldes laterally spaced from the dividing line and in the Einwirkfeld a cutout
- the impact field thus has a shape in which its front end, which first sweeps the glass in the cutting process, has two forwardly projecting, converging on the intended parting line areas.
- Einwirkfeld has in this way at the front end a convex cut, or a section through which the dividing line passes.
- the invention provides a method of separating thin glass having a thickness smaller than 1.2 mm, in which the thin glass is separated along a parting line is heated progressively, wherein the heating of the glass takes place by means of two energy sources, which each meet in a Text Economics capable on the glass and heat it up.
- the two impact areas here form the Einwirkfeld or the Einwirkzone.
- Energy sources are directed onto the glass so that the impact areas are offset laterally in the direction perpendicular to the separation line. These impact areas laterally offset from each other transversely to the dividing line lead accordingly to a high tension in a lateral direction transversely to the dividing line. This also allows the safe
- the two energy sources can hit the glass in time intervals.
- the impact areas are in particular also arranged side by side, transversely to the cutting direction.
- the areas have the same form and intensity according to a development of the invention.
- the thin glass is then preferably cooled with a cooling jet, the cooling jet continuing to be directed onto the glass so that its point of incidence lies on the dividing line.
- the crack propagation already takes place by the heating in the overlap area and the associated temperature difference to the surrounding glass.
- the cooling jet is used in particular that already through
- the procedure can generally be applied to thin glasses with a
- Thickness of 1.2 millimeters or less can be applied. However, particular advantages are found in very thin glasses with thicknesses in the range from 5 ⁇ m to 150 ⁇ m,
- the cooling jet may be a gas jet, in particular a
- Air jet, or even an aerosol beam are air-water and air / alcohol mixtures.
- the cooling jet may be a liquid jet or a droplet jet.
- the droplet jet can be easily generated by means of an inkjet printhead. It has turned out to be favorable to the flow of
- Cooling jet i. to choose the volume flow of the cooling fluid depending on the thickness of the glass.
- the flow can also be adjusted in proportion to the glass thickness.
- a glass thickness of 50 pm a flow which is about twice as high as the flux, which is particularly suitable for a glass of 100 ⁇ m, proves to be favorable.
- very low flows are already sufficient, with the
- optimal cooling jet flux at a glass thickness of 100 pm is almost zero.
- a certain cooling jet flow is always cheap.
- Completely without a cooling jet the cutting process can become unstable or start badly and it can lead to demolition of the process, in which the crack stops propagating.
- too high a flow can lead to thermal or mechanical wave formation in the glass.
- Energy maxima can be determined by beam geometry, laser power, positioning of both laser beams,
- Feed rate and possibly other more adapted are also adapted.
- a device for separating thin glass with a thickness less than 1.2 mm, preferably with a thickness in the range of 5 pm to
- 150 pm comprising at least one energy source and means for causing the energy of the energy source to act on the thin glass in an exposure field so that the thin glass is heated in the region of the exposure field, and wherein a feeding device is provided for the thin glass and the impact field relative to each other to move along a designated dividing line, so that by the temperature difference of the heated by the energy sources glass to the surrounding glass, a mechanical stress is generated in the glass, through which a crack following the mechanical stress along the dividing line is provided, wherein a device is provided which generates the Einwirkfeld with a shape, which two
- Dividing line which fringe in the Einwirkfeld a section through which the dividing line runs, such that in the portion of this spacing regions of the thin glass adjacent the dividing line are heated more than areas on the dividing line, so that when moving the thin glass along the dividing line, these partial areas in
- Moving direction of the thin glass converge and meet on the dividing line.
- a corresponding device for separating thin glass accordingly has a device for providing at least two energy sources
- a feed device is provided in order to move the thin glass and the impact regions relative to one another along an intended separation line, so that the temperature difference between the glass heated by the energy sources and the surrounding glass, in particular along the parting line into the overlap region
- incoming glass is a mechanical stress generated in the glass, through which a crack propagates following the mechanical stress along the dividing line.
- a cooling jet generator is according to a preferred
- the feed ultimately depends on the relative movement of glass and energy sources to each other. Accordingly, it is both possible to keep the energy sources stationary and move the thin glass or vice versa
- the impact areas are mirror-symmetrical to one another, with a mirror axis that runs along the path.
- a particularly high symmetry is achieved when the
- Dividing line, or the path represents the reflection axis and also the impact area of the cooling jet is on the path.
- the crack generated by the method may be a crack, which thus does not yet split the thin glass.
- Cutting can then be done by applying a bending moment to the dividing line.
- the invention then corresponds to scratching.
- the crack can in particular also completely cut through the thickness of the thin glass, so that after the crack propagation the glass is cut at the crack.
- a particularly suitable geometry for generating the high mechanical stresses in the glass is achieved by impact areas, the inner, mutually facing edges extending obliquely to the dividing line, such that for a given point on the dividing line in the progressing along the dividing line heating these inner edges run to the point. If this point is crossed by the inner edges, the overlap area begins, which then passes over the point.
- Very suitable energy sources are laser beams.
- the two laser beams as energy sources can originate from a single laser and, for example, through Beam splitting of a single beam of the laser can be generated.
- the facility includes
- the laser is in particular an infrared laser, whose light is already absorbed in very close to the surface regions of the glass. This is especially true for glass above 3 pm. Very suitable is a CC> 2 laser. This laser type emits infrared radiation with wavelengths greater than 5 pm, which leads to a very high absorption at the surface and low reflection in the glass. This makes a C02 laser for heating very efficient.
- the invention is particularly suitable for braiding a thin glass in the form of a thin glass ribbon
- borders can be production-related edge regions with a greater glass thickness than the central quality region.
- the invention is also suitable for cutting
- Fig. 1 shows an apparatus for carrying out the method according to the invention.
- Fig. 2 shows typical forms of Einwirkfeldern,
- Fig. 3 shows the surface of a thin glass
- FIG. 4 shows a variant of the example shown in FIG. 2 with a further cooling jet.
- Fig. 5 shows beam profiles of an energy source before and after beam shaping with a diaphragm.
- Fig. 8 as a comparative example, a diagram of
- Fig. 9 is a graph of the fracture probabilities of thin glass samples depending on an applied
- Thin glass element in the form of a glass roller Thin glass element in the form of a glass roller.
- Fig. 1 shows an example of an inventive
- the device 2 according to a preferred application of the invention for separating
- a method for separating glass especially here for separating ribbons 101, 102 of a thin glass ribbon based on the fact that a thin glass ribbon 1 with a thickness of at most 1.2 mm, preferably at most 400 pm, more preferably in the range of 5 pm to 150 pm along a feed direction 103 by means of a transport device 20 via a
- Trace energy sources in the feed direction 103 of the thin glass ribbon traces along the intended dividing lines 3.
- the feed direction 103 is expediently in the longitudinal direction of the thin glass ribbon.
- a cooling jet generator 40 a cooling jet 5 is blown onto the heated track, so that the heated area is cooled again and by cooling a
- Combination point of both laser beams cut edges is generated in order to avoid the contact of both edges in the further course of transport which in turn would lead to damage to the edges and thus to a reduction in the edge strength.
- a second cooling jet generator 41 may also be provided for each cut to be carried out
- Cooling jet 6 hits the glass before the impact of the energy sources.
- a second cooling jet 6 is used whose impingement 52 lies in the feed direction in front of the impact areas 11, 12 of the energy sources 9, 10, so that a point of the thin glass 1 on the parting line during feeding first the impingement 52 of the second cooling jet, then the overlapping area and then traverses the impingement of the first cooling jet 5.
- a gas jet in particular an air jet can be used.
- aerosol jets are particularly preferred as cooling jets. Due to the liquid phase of the aerosol, a higher cooling capacity is achieved and thus also a higher negative thermal expansion is achieved. Moist air has also proved to be advantageous for stabilizing the cutting process. This is the case even if initially no liquid phase is present in the air, so the air is not present as an aerosol, at least before the gas outlet.
- a relative humidity of the gas used for the cooling jet preferably air as gas from 70% to 100%, preferably greater than 80%, particularly preferably greater than 90%.
- a droplet jet may also be used
- Liquid jet for example, a water jet can be used for cooling.
- a droplet jet can according to a development in a simple manner by means of a
- Inkjet printhead are generated. Both a
- Droplet stream, as well as a liquid jet offer the advantage of having a high cooling capacity on a very
- a cooling jet which is a humidified gas jet with a relative humidity of 70% to 100% or comprises a liquid phase, be it as aerosol droplets, in the form of a liquid jet or as a droplet jet with one after the other ejected droplets.
- the cooling jet generator 40 then comprises a device for producing a moistened gas jet with a relative humidity of 70% to 100%, in particular moistened by water vapor, or a cooling jet with a liquid phase.
- the relative humidity of the gas jet may preferably be greater than 80%, particularly preferably greater than 90%.
- the cooling jet flow i. the cooling fluid volume flow can be in particular between 0.001 l / h (liters per hour) and 1.0 l / h.
- glass thicknesses between 75 pm and 400 pm e.g. for one
- Glass thickness of 100 pm (in particular 100 pm plus / minus 10 pm), generally a volume flow between 0.001 l / h and 0.3 l / h, preferably of 0.05 l / h (in particular plus / minus 0.01 l / h) very cheap.
- a volume flow is between 0.06 l / h and 1.0 l / h, preferably 0.4 l / h (in particular
- the embodiment with the separation of the thin glass 1 on a levitation pad 21 is of course not limited to the illustrated specific example.
- the thin glass 1 is stored on a gas cushion generated with a Levitationsunterlage or over the gas cushion, the impact areas of the energy sources and the impact area of the cooling jet 5 in the area supported by the gas cushion of the thin glass 1 lie.
- the laser beam of the laser 8 by means of a beam splitter in two partial beams 81, 82 as energy sources 9, 10th
- the cooling jet is directed onto the dividing line 3 and therefore, in the longitudinal direction 103 of the thin glass ribbon, strikes centrally between the areas of incidence of the laser beams 81, 82.
- Laser beam 81, 82 heated area runs to the
- Scoring device 9 removed from the surface of the thin glass ribbon 1 and thus ends the damage.
- corresponding device 2 therefore preferably has one
- scoring device 89 is preferably a scriber, especially preferred wheel with structured
- FIG. 1 shows the thin glass ribbon after inserting the initial damage in the form of a
- the levitation pad 21 is compressed by a pressure source, such as a pump 33.
- the compressed fluid preferably supplied air.
- Levitationsunterlage 21 forms, which carries the thin glass 1 and stores. Instead of a pump 33 is
- a reservoir with compressed fluid conceivable.
- a reservoir and / or a throttle of the pump 33 and the Levitationsunterlage 21 may be interposed to a uniform
- the thin glass 1 is thus transported floating in the vicinity of the cutting process by gas levitation, so that on the one hand the
- Ambient air acts as a thermal insulator
- the transport device 20 comprises according to a
- Embodiment as also shown in Fig. 1, one or more conveyor belts 54, 55.
- two conveyor belts are provided, wherein the conveyor belt 54 in front in the transport direction and the conveyor belt 55 in
- Transport direction behind the levitation pad 21 are arranged. It is particularly favorable if a Transport belt, which in the transport direction in front of the
- Levitationsunterlage 21 is arranged (in the example of Fig. 1 so the conveyor belt 54), a vacuum suction 53 has to the thin glass ribbon on the conveyor belt
- the laser beams of the lasers 8 are in each case divided by means of a beam splitter 80, preferably into two mirror-symmetrical partial beams 81, 82. These partial beams are now so on the
- Thin glass 1 directed that their impact areas are left and right offset to the dividing line 3. In other words, the impact areas are thus offset laterally in the direction perpendicular to the parting line 3.
- the laser beams 81, 82 thus form energy sources 9, 10 according to the
- the apparatus 2 for separating thin glass accordingly has a device for providing at least two for each cut to be carried out in parallel
- the device for providing the energy source is here by one of the laser, as well as the
- Impact areas 11, 12 in an overlapping area 13 An advancing device 20 is provided in order to move the thin glass 1 and the impact areas 11, 12) relative to each other along the intended parting line 3.
- Parting line 3 lying point of the thin glass 1 passes through when moving by means of the feed device 20 first a first optional cooling jet, then the
- Fig. 2 (a) generally shows two impact areas 11, 12 which together form an exposure field or zone 4.
- Impact areas 11, 12 is located between these two areas a section 14th
- Part of the Einwirkfeldes 4 can by a
- FIG. 2 (b) shows an example of an exposure field 4 in with a with his front, pointing in the transport direction v-shaped cutout 14, which two sub-areas 42, 44 of the
- Einwirkfelds 4 separates, so that they are spaced transversely to the dividing line 3, wherein the mutually facing edges of the partial areas to run towards each other and meet at the intersection of the dividing line 3 with the Einwirkfeld 4.
- Such an exposure field 4 can also be generated with a single energy source, for example by a
- Masking is done. For example, the
- Source of energy to be a laser beam, wherein a part of the impact spot forming laser spot is hidden to form the cutout 14.
- FIG. 3 shows an embodiment of the impact regions of the energy sources 9, 10, as well as schematically the temperature and stress distribution on the thin glass 1.
- the thin glass 1 travels along the feed direction through the
- Impact areas 11, 12 of the energy sources in the picture so from top to bottom. Since the impact areas 11, 12 are inclined to the dividing line 3, is located between them
- Impact areas 9, 10 now provide a stable leadership the crack. In a deviation of the course of the
- Dividing line decreases by the likewise existing heating of the glass in these areas of temperature and thus the voltage gradient.
- the cooling jet is in principle for a better stability of the separation process of advantage.
- the cooling jet can be formed in particular by an aerosol jet. Also a liquid jet or a
- Droplet jet can be used for cooling.
- Steam humidified gas jet in particular a humidified air jet.
- the relative humidity is preferably at least 70%.
- the impact areas 11, 12 of the example shown in FIG. 3 have an elongated, in particular oval or elliptical shape.
- the impact areas 11, 12 are arranged with their longitudinal axes oblique to the parting line 3.
- the dividing line 3 preferably also the impingement regions 11, 12 are congruent and, moreover, mirror-symmetrical with respect to one another.
- the impact areas 11, 12 produce, whose inner, mutually facing edges 110, 120 extend obliquely to the parting line 3, that for a given point on the dividing line in the progressing along the dividing line heating these inner edges 110, 120 on the Run to point and, if the point is crossed by the inner edges 110, 120, the
- Overlapping area 13 the point passes over. Due to the oblique arrangement of the impact areas 11, 12 with respect to the dividing line are the longitudinal axes of the
- Feed rate can be adjusted to a
- Longitudinal axes of the elongated impact areas is set to the dividing line depending on the feed rate or the thickness of the thin glass. Thus, at lower speeds, the influence of the heat conduction in the direction of the predetermined cut can be controlled. A greater influence of heat conduction in lateral
- the composite impact area has as the action field 4 a V-shaped form which is open in the cutting direction.
- Fig. 4 shows a variant of the embodiment shown in Fig. 3.
- the invention is illustrated without limitation
- Embodiment uses a second cooling beam, the AufThese (52 in the feed direction before the Impact areas 11, 12 of the energy sources 11, 12 is located, so that a point of the thin glass on the dividing line
- a refrigeration line zone 16 is generated, through which in turn the dividing line 3 runs.
- this cold zone strikes the overlap region 13 of the two impact regions 11, 12 of the energy sources, so that an even steeper temperature rise can be achieved.
- Energy source can be achieved according to an embodiment of the invention by aperture. Accordingly, in this case
- Development of the invention uses electromagnetic radiation as energy sources 9, 10, preferably laser beams and their intensity distribution before hitting the thin glass 1 by means of a diaphragm by hiding local areas of the respective beam with respect to the
- FIG. 5 shows as an example two beam profiles 26, 27, shown as an intensity profile in a direction perpendicular to the beam direction, for example along the longitudinal direction of the elongated impact regions 11 shown in FIGS. 3 and 4. 12.
- Beam profile 26 is a profile obtained after shaping the laser beam via suitable lenses or mirrors.
- the intensity of the beam profile 26 drops continuously towards the edge over a wide range.
- Example (c) is a triangular impact area.
- the impact areas 11, 12 can be
- Feed direction 103 is also shown in FIG. 7.
- a configuration according to example (b) can, for example, with sufficient overlapping of the elliptical impact areas 11, 12 in those shown in Fig. 3 and Fig. 4
- Edge zones of the respective impact areas 11, 12. Each of the shapes shown can bring particular edge quality advantages depending on the glass type, glass thickness and feed rate.
- FIGS. 8 and 9 are double logarithmic plots of fracture probability as a function of the bending stress of the thin glass samples.
- Measured values of FIG. 8 are therefore the average breaking stress at 175 MPa.
- Shape parameter m 8.29. It can thus be seen that with thin glasses with thicknesses of 250 ⁇ m or less, a considerable increase in strength can be achieved. This is expressed in particular in the shape parameter of the underlying Weibull distribution.
- the invention therefore also relates to a thin glass element producible with the invention with a thickness of at most 250 ⁇ m, which comprises at least one by means of voltage tripping, in particular laser
- Tension riser race has cut edge, wherein the thin glass disc for edge emanating fractures under bending load a Weibull distribution with a
- the minimum thickness of the thin glass is preferably 5 ⁇ m.
- CC denotes the thermal
- the following table shows specific characteristics listed some of the invention well suited glasses.
- the parameter Tg denotes the transformation temperature.
- a suitable group of glasses for the invention alkali-free borosilicate glasses.
- One glass of this class is the AF32 glass already mentioned in the table.
- Borosilicate glasses with the following components in
- One glass of this class of glasses is the Schott glass D263 already mentioned in the table.
- the glasses with more precise compositions are also described in US 2013/207058 AI, the content of which is also fully made subject to the present application with respect to the compositions of the glasses and their properties.
- Fig. 10 shows this an example.
- a method of separating thin glass 1 having a thickness smaller than 1.2 mm in which the thin glass 1 is progressively heated along a path defining a parting line 3 in an impact area 11 by means of a power source 9 so that and also the impact area 11 of the power source 9 is located on the dividing line 3, and is subsequently cooled, so that by the temperature difference thus produced a mechanical
- Impact area 50, 51 cool the previously heated thin glass 1, wherein the impact areas 50, 51 are offset in the direction perpendicular to the separation line laterally to each other and overlap in an overlapping area 13, so that the dividing line 3 passes through this overlapping area 13.
- a cooling line zone 16 originating from its impact areas 50, 51 is also caused by the cooling jets.
- the glass heated in the core region 150 of the heat conduction zone then hits through the movement along the
- tailored thin glass elements are achieved, even if they are under permanent bending load or more general of a superficial tensile load. To have a low break rate within a long
- a thin glass element 100 is provided, which is in development of the invention under tensile stress, in particular due to a bending stress, wherein the tensile stress is smaller than the following term:
- G a and G e are mean values of tensile stress at break of specimens of the glass element under bending stress, where Lref is the edge length and A re f is the area of the specimens, where G a is the mean value of the tensile stress at
- G e Break in the surface of the sample, and G e is the average of the tensile stress at an outgoing from the compound obtained with the inventive method edge of the sample fraction, and wherein A s and A a represent the standard deviations of the mean values G e, or G a, and wherein
- a apP is the area of the thin glass element and L apP is the added edge length of opposite edges of the glass element and ⁇ is a predetermined maximum break quota within a period of at least six months.
- the predetermined maximum fracture rate ⁇ is preferably 0.1 or less (ie at most 10%), more preferably less than 0.05 (less than 5%).
- Thin glass member 100 is provided, which is set below a tensile stress G apP , which is smaller than the above-mentioned term (1).
- the tensile stress can be caused by, for example, rolling up or even mounting on a support under forced bending.
- the glass element be placed under a tensile stress ⁇ which is less than
- the minimum bending radius R with the tensile stress G apP has the following relationship:
- E denotes the Young's modulus
- t the thickness of the thin glass
- V the Poisson's number of the glass. Preferred glass thicknesses are at the top of the description
- Thin glass band which are in the role at the end faces, are as already with reference to FIG. 1
- a web material 18 can be wrapped with.
- Bend radii are recorded at break and based on these data statistical parameters determined and based on these parameters, a range for a bending radius
- the invention now provides a thin glass element 100
- Time-delayed fractures are caused in particular by stress corrosion cracking.
- Thin glass element 100 in the form of a roll 3 with a rolled up thin glass 1 with a length of preferably at least 10 meters is therefore based on
- a thin-glass band of the same glass material of the same thickness and glass edges of the same shape as the glass material of the samples 10 is provided, at least its longitudinal edges being obtained by laser
- Truss race is made and the thin glass ribbon is wound into a roll, wherein the inner radius of the roll, which is the radius of the innermost layer of the
- Thin glass ribbon is chosen to be in the range of Rmin according to equation (8) to R ma x according to equation (9), where t is a predetermined minimum duration in days which the thin glass roll should survive without breakage.
- t is a predetermined minimum duration in days which the thin glass roll should survive without breakage.
- equations (8) and (9) are adjusted so that the fractional ratio within a given minimum duration is generally less than 0.1, preferably less than 0.05.
- the production of the edges according to the invention and their improved strength influence the parameters s and ⁇ R>.
- the mean value ⁇ R> as compared with samples not in accordance with the invention is also overall
- the variance s may increase or even become smaller than samples produced according to the invention.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Optics & Photonics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Thermal Sciences (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Laser Beam Processing (AREA)
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Abstract
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2017550762A JP6921000B2 (ja) | 2015-03-27 | 2016-03-24 | ガラスを連続的に分断するための方法と装置 |
DE112016000185.1T DE112016000185A5 (de) | 2015-03-27 | 2016-03-24 | Verfahren und Vorrichtung zum kontinuierlichen Trennen von Glas |
CN201680018744.3A CN107438584B (zh) | 2015-03-27 | 2016-03-24 | 用于连续分离玻璃的方法和装置 |
US15/661,719 US10584054B2 (en) | 2015-03-27 | 2017-07-27 | Method and device for continuous separation of glass |
Applications Claiming Priority (2)
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DE102015104801.9 | 2015-03-27 | ||
DE102015104801.9A DE102015104801A1 (de) | 2015-03-27 | 2015-03-27 | Verfahren und Vorrichtung zum kontinuierlichen Trennen von Glas |
Related Child Applications (1)
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US15/661,719 Continuation-In-Part US10584054B2 (en) | 2015-03-27 | 2017-07-27 | Method and device for continuous separation of glass |
Publications (1)
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WO2016156234A1 true WO2016156234A1 (de) | 2016-10-06 |
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PCT/EP2016/056612 WO2016156234A1 (de) | 2015-03-27 | 2016-03-24 | Verfahren und vorrichtung zum kontinuierlichen trennen von glas |
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US (1) | US10584054B2 (de) |
JP (1) | JP6921000B2 (de) |
CN (1) | CN107438584B (de) |
DE (2) | DE102015104801A1 (de) |
WO (1) | WO2016156234A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3967667A1 (de) | 2020-09-15 | 2022-03-16 | Schott Ag | Verfahren und vorrichtung zum zuschneiden von glasfolien |
Families Citing this family (5)
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KR20210042045A (ko) * | 2018-08-10 | 2021-04-16 | 니폰 덴키 가라스 가부시키가이샤 | 유리판의 제조 방법 |
JP2021123509A (ja) * | 2020-02-03 | 2021-08-30 | 日本電気硝子株式会社 | ガラス板の製造方法 |
JP7459536B2 (ja) * | 2020-02-04 | 2024-04-02 | 日本電気硝子株式会社 | ガラス板及びガラス板の製造方法 |
JP2021123518A (ja) * | 2020-02-05 | 2021-08-30 | 日本電気硝子株式会社 | ガラス板の製造方法 |
CN112321142B (zh) * | 2020-10-26 | 2022-08-26 | 蓝思科技(长沙)有限公司 | 一种玻璃加工方法 |
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Also Published As
Publication number | Publication date |
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DE112016000185A5 (de) | 2017-08-31 |
CN107438584B (zh) | 2020-07-24 |
CN107438584A (zh) | 2017-12-05 |
US10584054B2 (en) | 2020-03-10 |
JP6921000B2 (ja) | 2021-08-18 |
JP2018515411A (ja) | 2018-06-14 |
DE102015104801A1 (de) | 2016-09-29 |
US20170369357A1 (en) | 2017-12-28 |
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