EP3947302A1 - Convoyage de feuilles de verre par des rouleaux conformés - Google Patents
Convoyage de feuilles de verre par des rouleaux conformésInfo
- Publication number
- EP3947302A1 EP3947302A1 EP20713290.3A EP20713290A EP3947302A1 EP 3947302 A1 EP3947302 A1 EP 3947302A1 EP 20713290 A EP20713290 A EP 20713290A EP 3947302 A1 EP3947302 A1 EP 3947302A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rollers
- roller
- glass
- conveying
- sheets
- 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.)
- Withdrawn
Links
- 239000011521 glass Substances 0.000 title claims abstract description 101
- 238000005452 bending Methods 0.000 claims description 51
- 238000000034 method Methods 0.000 claims description 12
- 230000001174 ascending effect Effects 0.000 claims description 8
- 230000000295 complement effect Effects 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000013003 hot bending Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000005341 toughened glass Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000005346 heat strengthened glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/025—Re-forming glass sheets by bending by gravity
- C03B23/0252—Re-forming glass sheets by bending by gravity by gravity only, e.g. sagging
- C03B23/0254—Re-forming glass sheets by bending by gravity by gravity only, e.g. sagging in a continuous way, e.g. gravity roll bending
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
- C03B35/161—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors specially adapted for bent sheets or ribbons
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
- C03B23/033—Re-forming glass sheets by bending by press-bending between shaping moulds in a continuous way, e.g. roll forming, or press-roll bending
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
- C03B35/18—Construction of the conveyor rollers ; Materials, coatings or coverings thereof
- C03B35/182—Construction of the conveyor rollers ; Materials, coatings or coverings thereof specially adapted for bent sheets or ribbons
Definitions
- the invention relates to a curved roller for conveying and optionally bending glass sheets and a device comprising it, said roller being of the type with a rectilinear axis of rotation and a curved surface of revolution.
- the roller according to the invention is more particularly intended to form part of a set of rollers forming a conveying sheet for conveying glass sheets passing one behind the other.
- the roller can also be used for bending glass sheets brought to their deformation temperature.
- the roller is advantageously associated with another roller of the same type but of complementary shape, this pair of rollers being able to be called “diabolo / tonneau" or “diabolo / spindle", the sheets being convex while circulating between them. . If one of the rollers of a pair of bending rollers is of the diabolo type, the other being complementary to it is necessarily of the barrel (or spindle) type and vice versa.
- WO2005047198 teaches the bending of glass sheets in advance on a shaping sheet formed by rollers allowing their advancement and arranged along a path with a circular arc profile, the sheets being curved in their direction of advance.
- WO2014053776 teaches a roller for driving glass sheets comprising a metal rod preformed according to a profile curved in its length and a flexible sheath capable of rotating around the rod.
- the shaped metal rod does not rotate and it is the flexible sheath rotating around said rod that rotates and drives the glass sheets.
- EP0346198 and EP1533280 teach pairs of dolly / barrel type rollers.
- the roller according to the invention belongs to the category of rollers with a rectilinear axis of revolution and a curved surface of revolution. Sheets of glass can be conveyed and, where appropriate, bent by contact with this roller in its conveying zone. According to the prior art, the shape given to this type of roller is always symmetrical with respect to its middle and no need has ever been sought or felt to modify this symmetrical shape. To produce such a roller, a block of metal is machined by rotation about its axis on a machining lathe.
- Bending glass sheets by bending between rollers is a particularly rapid and economical process and often used for making simple, symmetrical and shallow bends, such as the side windows of automobile windows.
- the bending of panes with more complex shapes is generally carried out by different methods such as bending by pressing, which is also much more expensive to put in place.
- the invention provides a solution to the aforementioned problems.
- the invention relates to a roller for conveying sheets of glass, comprising on its surface a zone for conveying the sheets of glass, said roller comprising a rectilinear axis of revolution, the conveying zone forming a surface of revolution curved around said axis of revolution, said roller being asymmetrical on either side of its extreme, minimum or maximum diameter.
- the roller is of the diabolo or barrel type to form part of a set of rollers forming a sheet for conveying glass sheets at a temperature above 400 ° C.
- the roll is asymmetric on either side of its extreme diameter, i.e. its minimum diameter for a diabolo type roll or its maximum diameter for a barrel type roll, and the diameter of the roll varies monotonously on either side of its extreme diameter.
- the surface of revolution of the roller can be considered to be a set of circles parallel and orthogonal to the axis of the roller and whose centers are on said axis.
- the extreme diameter of the roll is minimum or maximum and corresponds to that of the circle of extreme, minimum or maximum diameter.
- the shape of the generator of the surface of revolution is curved, which implies that the roller does not have a constant diameter along its axis. It is also asymmetric across the extreme diameter of the roll.
- the roller according to the invention can therefore include a hollow in its length as for a roller of the "diabolo” type, or a bump in its length as for a roller of the "barrel” type.
- the diameter of the roller Due to its extreme diameter, the diameter of the roller generally varies monotonically as one moves along the axis of the roller and towards one of its ends.
- the extreme diameter is not at one end of the roll conveying area.
- the conveying zone therefore continues on either side of the extreme diameter.
- the roller comprises a useful zone on either side of its extreme diameter coming into contact with the glass sheets, the ratio of the axis lengths corresponding to the two sides of the conveying zone on either side of the extreme diameter being generally included in the range from 0.25 to 4 and more generally from 0.5 to 2 and more generally still from 0.8 to 1, 2.
- the roll usually has only one extreme diameter.
- the invention also relates to a device for conveying glass sheets moving one behind the other comprising at least one roller according to the invention, capable of rotating about its axis.
- the roller according to the invention is suitable for being driven in rotation about its axis by a motorized system. Generally, the drive of the roller from one of its sides is sufficient and its other side is generally in free rotation.
- the conveying zone is the zone of the useful roller suitable for conveying sheets of glass.
- the extreme diameter of the roll is in the conveying area.
- the roller has been machined to have an asymmetric shape with respect to the plane P orthogonal to its axis and including this extreme diameter (minimum or maximum).
- the machining of the roller is usually done by turning a solid metal cylinder.
- the roller is generally made of metal, such as steel.
- the extreme diameter can be in the middle of the axis length corresponding to the conveying area. This may also not be the case, since the axis length corresponding to the conveying zone is then longer on one side of the extreme diameter than the axis length on the other side.
- rollers of this type of the prior art have a symmetrical shape on either side of their extreme diameter generally located in their middle, the generatrix of their surface of revolution being circular or close to circular.
- shape of the generator (included in any plane comprising the axis of the roller) rather resembles a comma, with smaller radii of curvature on one side of the extreme diameter, and radii of greater curvature on the other side of the extreme diameter.
- the axis of the roll is generally horizontal.
- the roller according to the invention is generally part of a sheet of rolls capable of coming into contact with the glass sheets moving one behind the other.
- the roller can therefore be part of a set of substantially parallel side by side rollers of the same nature.
- the sheet of rolls is composed of a set of substantially parallel rollers.
- the device according to the invention can comprise a plurality of said roller, substantially parallel to each other, forming a sheet of rollers in contact with which the glass sheets can be conveyed one behind the other.
- the web may be a lower web on which the sheets rest and are conveyed.
- the web can also be an upper web under which the sheets are conveyed.
- the device also comprises a lower web and the sheets scroll and are generally curved between the lower layer and the upper layer. The rolls of the same web are able to come into contact with one and the same face of the glass sheets.
- the roller according to the invention can also be used for their bending.
- the glass sheets may bulge by sagging under the effect of their own weight as they travel over the web of rolls.
- the device may comprise a first roller according to the invention and such a second roller ("such" meaning of the same constitution as the first, that is to say “comprising a rectilinear axis of revolution, the zone of conveying forming a surface of revolution curved around said axis of revolution, said roller being asymmetrical on either side of its extreme diameter "), these two rollers forming a pair of rollers, their surfaces of revolution being complementary and these two rollers having a constant spacing between them over the entire length of the conveying zone. This spacing corresponds to the thickness of the glass sheets to be bent.
- the sheets are curved by passing between the two rollers of the pair of rollers.
- the axes of these two rollers are parallel to each other.
- the plane containing the axes of the two rollers is perpendicular to the direction of conveying the sheets.
- these two rolls can be one above the other.
- the axis of the first roll is at a lower dimension than the axis of the second roll, the extreme diameter of the first roll being a minimum value and the extreme diameter of the second roll being a maximum value.
- the glass By passing between the rollers of such a pair of bending rollers, the glass, brought to its deformation temperature, is bent in a transverse direction, that is to say a direction orthogonal to the direction of travel of the glass, c 'that is, a direction parallel to the axis of the roller. In this direction, the glass takes the shape given by the shape of the generatrix of the surface of revolution of the roller.
- the bending device according to the invention can also give the glass sheets a longitudinal bending, that is to say in the direction of travel of the glass sheets.
- a conveying sheet in the form of an arc of a circle seen from the side, ascending or descending, and placing, from the start of the arc of a circle, at least one roller of the same type above said sheet (while having a shape complementary to that of the sheet), parallel to a roll of the roll sheet and while maintaining a constant spacing with it over the entire length of the rollers, said spacing corresponding to the thickness of the glass sheets to be bomber.
- the glass sheets then also take the shape of an arc of a circle in the longitudinal direction.
- Cooling air blowing nozzles can blow air between the rollers as soon as the shaping of the glass begins in a first portion of the arcuate path. Air is also blown after the first rolls to continue cooling.
- This cooling is generally intended to exert thermal reinforcement leading to thermally reinforced glasses, in particular so-called “heat strengthened glass” also called “semi-toughened”, or so-called thermally toughened glasses (“ thermally toughened glass ”in English).
- the bending device can comprise a plurality of pairs of rollers according to the invention, forming a sheet of lower rollers and a sheet of upper rollers to exert a bending to the glass sheets passing between these two sheets of rollers. , said bending having at least one transverse direction perpendicular to the conveying direction of the glass sheets.
- the layers of rollers may have an ascending or descending curved profile in the direction of conveying the glass sheets in order to exert on the latter also a longitudinal bending by passing between these two layers of rollers. Bending is thermal bending, this expression designating hot bending of the glass at its softening temperature allowing its deformation, which is permanent after its return to ambient temperature. It is therefore not a case of cold bending acting in the elastic domain of the glass.
- the temperature of the glass during thermal bending is in particular between 400 and 700 ° C.
- the invention is particularly useful for conveying and, where appropriate, bending glass sheets the temperature of which is greater than 400 ° C, or even greater than 500 ° C, in particular between 400 and 700 ° C, and more particularly. between 500 and 680 ° C.
- the roll is intended to convey and / or bend sheets of glass at a temperature above 400 ° C, preferably, the roll is surrounded by a sock made of a material comprising refractory fibers (made of metal and / or ceramic) softening contact with glass.
- the glass sheets are brought to their deformation temperature by heating in an oven.
- the roller according to the invention can in particular be used to convey the glass sheets into the oven. The bending of the sheets can be done after they come out of the oven, while they still have the temperature allowing them to bend.
- the roller according to the invention can therefore also be located outside the oven to convey the sheets to the bending device.
- the bending device can also include the roller according to the invention.
- the sheets can pass over a sheet of rollers, in an upward or downward arc of a circle as already explained.
- the two rolls of a pair of bending rollers between which the glass passes may be of the roller type according to the invention.
- the invention also relates to a method of conveying glass sheets comprising the conveying of glass sheets passing one after the other in contact and in the conveying zone of the roller of the device according to the invention.
- the aim of asymmetry is to compensate for a lack of symmetry in the heating installation.
- it may be four sheets to be fitted pair by pair on both sides of the same motor vehicle.
- These two pairs of glass sheets can be intended to take on bending shapes having a pair-to-pair mirror symmetry (the mirror being vertical and passing through the middle of the vehicle for an observer placed facing the front of the vehicle): two sheets on one side of the motor vehicle (for example a "windshield quarter" and a "front quarter" correspond exactly to the same glazed elements on the other side of the vehicle but in mirror symmetry with respect to those intended for the first side.
- the glass sheets form two groups located on either side of the extreme diameter of the rollers, with each sheet of a corresponding group a sheet of the other group, these two sheets taking on bending symmetrical shapes. for the other with respect to the plane passing through the extreme diameter of the rollers.
- the sheets After hot bending, the sheets can be thermally reinforced by blowing fresh air on their surface.
- air can be blown onto the glass sheets between rollers of the same sheet to reinforce the glass thermally, in particular to thermally toughen it.
- the device according to the invention can therefore comprise air blowing nozzles for blowing air between rolls of the same ply to exert thermal reinforcement of the glass, in particular toughening.
- FIG. 1 shows two rollers 1 and 2 according to the invention forming a pair of rollers for bending two glass sheets 4 and 5 passing side by side in a conveying zone 3.
- the bottom roller 2 is of the "diabolo" type. ".
- This roller comprises a rectilinear axis 6 and a surface of revolution 7.
- This surface of revolution comprises a circle whose center is on the axis and of minimum diameter comprising the point 8.
- the surface of revolution is asymmetrical on both sides. of the plane P orthogonal to the axis of the roller and comprising this circle of said surface of revolution having a minimum extreme diameter.
- the top roller 3 is of the “barrel” type. This roller comprises a rectilinear axis 9 and a surface of revolution 10.
- This surface of revolution comprises a circle of maximum diameter comprising the point 1 1.
- the surface of revolution of this roller is asymmetric on either side of the plane P orthogonal to the axis 9 of the roller and including this circle of maximum diameter.
- the plane P includes both the circle of minimum diameter of roll 2 and the circle of maximum diameter of roll 1.
- These rollers have a complementary shape to each other and their surfaces of revolution are spaced apart from one another by a constant spacing over the entire conveying zone, this spacing being equal to the thickness e of a sheet of glass.
- the dotted lines on the right of the figure represent the shape that the surfaces of revolution of the two rollers would have to the right if they were symmetrical with respect to a plane P, which would then be a little more to the right on the figure.
- FIG. 2 is a schematic side view (transverse view) of a bending and hardening machine to which the invention is more particularly addressed.
- a sheet of glass scrolls and is heated in an oven, then passes through a web of ascending conformation, then, at the outlet, into a secondary cooling zone.
- the glass sheet 81 flat at the start, first passes through a heating zone 82 of a tunnel oven (the arrow in the oven indicates the conveying direction which is also the longitudinal direction), in which it is conveyed on a horizontal conveyor 83 driven by a web of rectilinear motor rollers 64 aligned in a plane.
- the glass On leaving the heating oven, the glass is at its deformation temperature allowing its thermal bending.
- the glass sheet 81 then enters a forming zone comprising a sheet of upper rollers 67 and a sheet of lower rollers 69, mounted in an ascending profile in an arc of a circle in side view.
- the glass sheets pass between the two rolls of pairs of rollers, said pairs being arranged one behind the other on the path of the glass sheets.
- the axis of the first roll is at a lower dimension than the axis of the second roll.
- the glass sheets scroll are pinched and shaped between pairs 73 of rolls of these two layers of rolls.
- the sheet of rollers 67 and the sheet of rollers 69 thus form a sheet of ascending conformation which conveys the sheet of glass 81 in the same direction as the conveyor 83.
- the sheets of glass 81 are bent from the first pairs 73 of rollers, in transverse direction as shown in Figure 1, and in the longitudinal direction corresponding to the ascending arcuate shape of the roll plies.
- This shaping is followed by cooling between the two layers of rollers, in particular quenching.
- nozzles blow fresh air between the rollers on both sides of the sheets.
- These nozzles are connected to boxes 70 supplying them with the necessary air.
- the glass is thus frozen just after its bending.
- the air is blown from the first pairs of bending rollers.
- the glass sheets 81 are then discharged by a flat conveyor 72 which pass through a secondary cooling zone 93.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1903319A FR3094363A1 (fr) | 2019-03-29 | 2019-03-29 | Convoyage de feuilles de verre par des rouleaux conformés |
PCT/EP2020/058430 WO2020200978A1 (fr) | 2019-03-29 | 2020-03-25 | Convoyage de feuilles de verre par des rouleaux conformés |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3947302A1 true EP3947302A1 (fr) | 2022-02-09 |
Family
ID=67956921
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20713290.3A Withdrawn EP3947302A1 (fr) | 2019-03-29 | 2020-03-25 | Convoyage de feuilles de verre par des rouleaux conformés |
Country Status (5)
Country | Link |
---|---|
US (1) | US20220185718A1 (fr) |
EP (1) | EP3947302A1 (fr) |
CN (1) | CN112020480A (fr) |
FR (1) | FR3094363A1 (fr) |
WO (1) | WO2020200978A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110799463B (zh) * | 2017-05-15 | 2022-09-09 | 康宁公司 | 有轮廓玻璃制品和制造有轮廓玻璃制品的方法 |
EP3655282B1 (fr) | 2017-07-18 | 2023-02-15 | Corning Incorporated | Système d'intérieur de véhicule comprenant un article en verre courbe complexe formé a froid |
KR102669222B1 (ko) | 2017-09-12 | 2024-05-24 | 코닝 인코포레이티드 | 장식용 유리 상에 터치 패널을 포함하는 디스플레이용 데드프론트 및 관련 방법 |
US11065960B2 (en) | 2017-09-13 | 2021-07-20 | Corning Incorporated | Curved vehicle displays |
TW202500521A (zh) | 2017-10-10 | 2025-01-01 | 美商康寧公司 | 具有改善可靠性的彎曲的覆蓋玻璃的車輛內部系統及其形成方法 |
CN117185634B (zh) * | 2023-07-28 | 2024-06-11 | 吴江南玻华东工程玻璃有限公司 | 一种钢化冷却装置 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE542065A (fr) * | 1954-11-19 | |||
BE546538A (fr) * | 1955-04-12 | |||
DE3310357C2 (de) * | 1983-03-22 | 1994-02-17 | Glasstech Inc | Vorrichtung zum Wölben und Fördern eines Flächengebildes |
FR2632297B1 (fr) * | 1988-06-07 | 1990-08-10 | Saint Gobain Vitrage | Recuperation et trempe simultanee des plaques de verre a la sortie d'une installation de bombage et de trempe a lit de conformation courbe dans la direction de defilement des plaques de verre |
FR2632298B1 (fr) | 1988-06-07 | 1990-08-10 | Saint Gobain Vitrage | Amelioration des performances des installations de bombage et de trempe de plaques de verre a lit de conformation courbe dans la direction de defilement du verre |
EP0373265B1 (fr) * | 1988-12-12 | 1994-01-26 | Ford Motor Company Limited | Procédé et appareil pour former une feuille de verre |
US5246477A (en) * | 1990-02-08 | 1993-09-21 | Wsp Ingenieurgesellschaft Fur Waermetechnik, Stroemungstechnik Und Prozesstechnik Mit Beschraenkter Haftung | Apparatus for the arching of glass sheets heated to the softening temperature |
FR2666081B1 (fr) * | 1990-08-23 | 1993-10-01 | Saint Gobain Vitrage Internal Sa | Procede et dispositif d'obtention de feuilles de verre bombees. |
FR2670775B1 (fr) * | 1990-12-21 | 1993-08-06 | Saint Gobain Vitrage Int | Procede et dispositif d'obtention de feuilles de verre bombees. |
JP2004075504A (ja) | 2002-08-22 | 2004-03-11 | Nippon Sheet Glass Co Ltd | 板ガラスの複曲成形方法及びその装置 |
FR2862056B1 (fr) | 2003-11-12 | 2006-01-13 | Saint Gobain | Procede et machine d'obtention de feuilles de verre bombees |
US7228717B2 (en) * | 2004-06-10 | 2007-06-12 | Glasstech, Inc. | Apparatus for glass sheet forming with cross curvature |
FR2996224B1 (fr) | 2012-10-03 | 2019-08-30 | Saint-Gobain Glass France | Bombage de feuilles de verre au defile sur un lit de rouleaux |
-
2019
- 2019-03-29 FR FR1903319A patent/FR3094363A1/fr not_active Withdrawn
-
2020
- 2020-03-25 EP EP20713290.3A patent/EP3947302A1/fr not_active Withdrawn
- 2020-03-25 US US17/441,075 patent/US20220185718A1/en not_active Abandoned
- 2020-03-25 WO PCT/EP2020/058430 patent/WO2020200978A1/fr unknown
- 2020-03-25 CN CN202080001457.8A patent/CN112020480A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
CN112020480A (zh) | 2020-12-01 |
US20220185718A1 (en) | 2022-06-16 |
WO2020200978A1 (fr) | 2020-10-08 |
FR3094363A1 (fr) | 2020-10-02 |
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