WO2013055861A1 - Procédé et système de reformage thermomécanique et outil de reformage mécanique - Google Patents

Procédé et système de reformage thermomécanique et outil de reformage mécanique Download PDF

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Publication number
WO2013055861A1
WO2013055861A1 PCT/US2012/059663 US2012059663W WO2013055861A1 WO 2013055861 A1 WO2013055861 A1 WO 2013055861A1 US 2012059663 W US2012059663 W US 2012059663W WO 2013055861 A1 WO2013055861 A1 WO 2013055861A1
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WO
WIPO (PCT)
Prior art keywords
area
reformable
reformable area
pusher
linear
Prior art date
Application number
PCT/US2012/059663
Other languages
English (en)
Inventor
Thierry Luc Alain Dannoux
Araund DEJEAN
Paul Louis Florent Delautre
Allan Mark Fredholm
Laurent Joubaud
Stephane Poissy
Original Assignee
Corning Incorporated
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.)
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Publication date
Application filed by Corning Incorporated filed Critical Corning Incorporated
Priority to CN201280062038.0A priority Critical patent/CN104203847B/zh
Publication of WO2013055861A1 publication Critical patent/WO2013055861A1/fr

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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
    • C03B23/0258—Gravity bending involving applying local or additional heating, cooling or insulating means
    • 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
    • C03B23/0256—Gravity bending accelerated by applying mechanical forces, e.g. inertia, weights or local forces

Definitions

  • the present invention l-elates generally to thermal reforming of flat (two- dimensional) glass sheets into shaped (three-dimensional) glass articles.
  • the glass sheet In gravity sagging, the glass sheet is positioned on a ring or skeleton that supports the periphery of the glass sheet. The system is then heated to a temperature close to the softening point of the glass. Under gravity, the glass sags, eventually assuming the desired shape. Differential heating of some regions of the glass sheet can be used to obtain some final shapes that cannot be reached solely by isothermal gravity sagging. For some special shapes, more advanced techniques have been developed that are based on articulated skeletons (see, e.g., U.S. Patent No. 4 286 980 A, "Method and apparatus for forming bent plate glass," 1 September 1981 [2] and U.S. Patent No.
  • thermo-mechanical reforming method includes heating a reformable area and a non-reformable area of a sheet of glass material to a first temperature corresponding to a first viscosity (step (a)).
  • the reformable area is subsequently locally heated to a second temperature corresponding to a second viscosity, where the second viscosity is lower than the first viscosity (step (b)).
  • a predetermined bend is formed in the reformable area during step (b) using a first forming method or a second forming method (step (c)).
  • the first forming method includes contacting a first pusher with the non-reformable area and translating the first pusher along a linear path to apply a pushing force to the non- reformable area that results in the predetermined bend in the reformable area (step (cl)).
  • the second forming method includes contacting a second pusher with an edge area of the reformable area and rotating the second pusher along a circular path to apply a pushing force to the edge area of the reformable area that results in the predetermined bend in the reformable area (step (c2)).
  • thermo-mechanical reforming method where step (cl) is used in step (c), contacting the first pusher with the non-reformable area during step (cl) includes contacting a curved surface of the first pusher with the non-reformable area.
  • thermo-mechanical reforming method where step (c2) is used in step (c), contacting the second pusher with the edge area of the reformable area during step (c2) includes contacting the edge area of the reformable area with a flat surface of the second pusher.
  • thermo-mechanical reforming method during step (b), the reformable area is allowed to sag by gravity into an initial bend having an initial bend angle (step (d)).
  • step (cl) is used in step (c)
  • step (d) precedes step (cl)
  • the initial bend is formed into the predetermined bend during step (cl)
  • the predetermined bend has a final bend angle larger than the initial bend angle at the end of step (c).
  • step (cl) starts when the initial bend angle is in a range from 70 to 90 degrees.
  • thermo-mechanical reforming method after the predetermined bend has been formed in step (c), the temperature in the reformable area is allowed to drop to a temperature between the first temperature and the second temperature (step (e)).
  • step (e) the first pusher is held in contact with the non-reformable area (where step (cl) was used in step (c)) or second pusher is held in contact with the edge area of the reformable area (where step (c2) was used in step (c)).
  • step (c) starts when the reformable area is at a third temperature corresponding to a third viscosity that is at least an order of magnitude lower than the first viscosity, where the third temperature is between the first temperature and the second temperature.
  • the predetermined bend has a final bend radius less than 20 mm.
  • the predetermined bend has a final bend angle greater than 60 degrees.
  • thermo-mechanical reforming method where step (cl) is used in step (c), the predetermined bend has a final bend angle greater than 90 degrees at the end of the step (cl).
  • thermo-mechanical reforming method where step (c2) is used in step (c), the predetermined bend is formed within 20 mm of an outermost edge of the sheet of glass material.
  • the sheet of glass material heated in step (a) is provided with a thickness in a range from 0.3 mm to 1.5 mm.
  • the sheet of glass material heated in step (a) is provided with a coefficient of thermal expansion greater than 5 ppm/K.
  • a mechanical reforming tool includes a pusher member having a contact surface for contacting a sheet of material, a lineai-to-rotary motion guide coupled to the pusher member, and an actuator coupled to the linear-to-rotary motion guide.
  • the linear-to-rotary motion guide is configured to receive a linear motion, convert the linear motion to a rotary motion, and impart the rotary motion to the pusher member.
  • the actuator is configured to provide the linear motion to the linear-to-rotary motion guide.
  • the linear-to-rotary motion guide comprises a pair of spaced-apart pivotable members, which are coupled to opposing ends of the pusher member.
  • the spacing between the pivotable members is wide enough to receive an edge of the sheet of material.
  • the actuator has a movable arm coupled to the pivotable members.
  • the movable arm is configured to transfer the linear motion from the actuator to the pivotable members.
  • the linear-to-rotary motion guide further comprises stop members for limiting pivoting of the pivotable members.
  • the contact surface of the pusher member is substantially flat.
  • a thermo- mechanical reforming system includes one or more heaters, a pusher member, a linear-to-rotary motion guide, and an actuator.
  • the one or more heaters are for selectively heating areas of a sheet of glass material.
  • the pusher member has a contact surface for contacting the sheet of glass material in a selected area.
  • the linear-to-rotary motion guide is coupled to the pusher member and is configured to receive a linear motion, convert the linear motion to a rotary motion, and impart the rotary motion to the pusher member.
  • the actuator is coupled to the linear-to-rotary motion guide and is configured to provide the linear motion to the linear-to-rotary motion guide.
  • Fig. la shows a sheet of glass material having an inwardly-located reformable area.
  • Fig. lb shows a sheet of glass material having an edge-located reformable area.
  • Fig. 2a shows a sheet of glass material on a support.
  • Fig. 2b shows heaters directing heat to reformable and non-reformable areas of a sheet of glass material.
  • Fig. 2c shows heaters directing heating to a reformable area of a sheet of glass material.
  • Fig. 3 shows temperature evolution in a reformable area of a sheet of glass material during a process for reforming the sheet of glass material.
  • Fig. 4a shows a mechanical reforming tool for forming a bend in an inwardly-located reformable area.
  • Fig. 4b shows a pusher of a mechanical reforming tool in contact with a non-reformable area of a sheet of glass material.
  • Fig. 4c shows a pusher of a mechanical reforming tool applying a pushing force to a non-reformable area of a sheet of glass material.
  • Fig. 4d shows an actuator of a mechanical reforming tool mounted on a rotary stage.
  • Fig. 5a shows a mechanical reforming tool for forming a bend in an edge- located reformable area.
  • Fig. 5b shows a pusher of a mechanical reforming tool in contact with an edge area of a reformable area of a sheet of glass material.
  • Fig. 5c shows a pusher of a mechanical reforming tool applying a pushing force to an edge area of a reformable area of a sheet of glass material.
  • thermo-mechanical method for reforming a sheet of glass material into a shaped article having flat and bent areas is disclosed.
  • the glass material is glass.
  • the glass material is glass-ceramic.
  • the sheet of glass material is thin, e.g., having a thickness in a range from 0.3 mm to 1.5 mm.
  • the sheet of glass material has a coefficient of thermal expansion greater than 5 ppm/K.
  • GORILLA® glass which is available from Corning Incorporated, New York.
  • the suitable glass is an ion-exchangeable glass, where the structure of the ion- exchangeable glass contains small alkali metal or alkaline earth metal ions that can be exchanged for larger alkali metal or alkaline earth metal ions.
  • the sheet of glass material provided is a flat sheet of glass material.
  • a flat sheet may be produced using any suitable method for producing flat sheets of glass material, such as overflow fusion downdraw process or a float process.
  • the sheet of glass material has at least one reformable area and at least one non- reformable area.
  • non-reformable area does not mean that the area cannot be reformed, but that the area will not be or is not reformed.
  • the glass material composition of the reformable area(s) will typically be the same as that of the non-reformable area(s).
  • the glass material composition of the reformable area(s) and non- reformable area(s) e.g., if it is desired that the reformable area(s) or non-reformable area(s) should have special properties.
  • the reformable area(s) will be contiguous with the non-reformable area(s), with each reformable area having at least one non-reformable area as a neighbor.
  • the number and location of reformable and non-reformable areas on the sheet of glass material will depend on the desired final shape of the shaped article.
  • Fig. la shows an example of a sheet of glass material 100 having a reformable area 102 and non-reformable areas 104, 106.
  • Fig. lb shows an example of a sheet of glass material 100a having a reformable area 102a and non-reformable area 106a.
  • the reformable area 102 of Fig. la is inwardly- located relative to the edge 101 of the sheet of glass material 100.
  • the reformable area of Fig. lb is edge-located relative to the edge 101a of the sheet of glass material 100a.
  • the location of the reformable areas 102, 102a on the sheets of glass material 100, 100a, respectively, would have a bearing on how the reformable areas are mechanically reformed.
  • the reformable area(s) e.g., 102 in Fig. la, 102a in Fig. lb
  • non- reformable area(s) e.g., 104, 106 in Fig. la, 106a in Fig. lb
  • the reformable area(s) will be formed into a three-dimensional shape and will no longer be flat, but the non-reformable area(s) will remain flat.
  • the three- dimensional shape will include at least one bend having a predetermined radius of curvature.
  • the predetermined radius of curvature will depend on the desired final shape of the shaped article. In one embodiment, a small radius of curvature, e.g., less than 20 mm, is formed in a reformable area. In one embodiment, the final bend angle formed in a reformable area is greater than 60 degrees. In another
  • the final bend angle formed in a reformable area is greater than 90 degrees.
  • the reformable area is edge-located and the bend formed in the edge-located reformable area is very close to an edge of the sheet of glass material containing the edge-located reformable area, e.g., within 20 mm of the edge of the sheet of glass material.
  • the sheet of glass material such as shown in Fig. la or lb, is placed on a support.
  • the placing is such that a portion of the sheet of glass material that includes the reformable area overhangs the support.
  • Fig. 2a shows the sheet of glass material 100 on a support 200.
  • the support 200 has a planar support surface 202 for supporting the sheet of glass material 100.
  • the sheet of glass material 100 is placed on the support surface 202 such that the reformable area 102 and non-reformable area 104 overhang the support 200.
  • the non-reformable area 104 is outboard of the
  • the support surface 202 that comes into contact with the glass material is preferably made of or coated or plated with a high temperature material.
  • high temperature materials include ceramics, glass-ceramics, refractory alloys, and superalloys such as INCONEL 600 and INCONEL 718.
  • a stopper 204 may be placed adjacent to or integrated with the support 200.
  • the stopper 204 has a stopper surface 206 that is in opposing relation to the reformable area 102. However, the stopper surface 206 is offset a distance from the support surface 202 so that there is room for the reformable area 102 to bend downwardly when heated to a reforming temperature.
  • the stopper surface edge 208 can function to limit the extent of the bend.
  • the stopper 204 may be made of the same material as the support 200.
  • the stopper surface 206 or stopper surface edge 208 that may come into contact with the non-reformable area 104 or reformable area 102 may be made of or coated or plated with a high temperature material as described above for the support surface 202.
  • Fig. 3 shows a typical process sequence for making the shaped article from the sheet of glass material 100.
  • Line 300 shows the temperature evolution in the reformable area 102 during the reforming process, and line 302 shows when mechanical reforming is on or off during the reforming process.
  • the reformable area 102 (in Fig. 2b) and non-reformable areas 104, 106 (in Fig. 2b) of the sheet of glass material 100 (in Fig. 2b), i.e., the entire sheet of glass material 100 are heated to a temperature To.
  • Fig. 2b shows heaters 210 directing heat to the entire sheet of glass material 100.
  • the heaters 210 may be any heaters capable of delivering heat controllably to the sheet of glass material 100, such as gas burners, resistive-type filaments, and plasma torches.
  • a numerical value or range of values has not been specified for temperature To. This is because the value of the temperature T 0 will depend on the composition of the sheet of glass material 100 (in Fig. 2b). However, one of skill in the art will know how to select the temperature To based on the following additional description of the temperature To.
  • temperature To is low enough to avoid deformation of or optical quality defects in the sheet of glass material 100 but high enough to avoid breakage of the sheet of glass material 100 due to dilatation mismatch when the reformable area 102 is subsequently heated locally.
  • the viscosity of the glass material at temperature To is greater than 6 x 10 9 Poise. In another embodiment, the viscosity of the glass material at temperature To is greater than 6 x 10 9 Poise but not greater than 10 12 Poise.
  • This temperature between To and T2 at time te may be at or near temperature Ti.
  • the temperature in the non- reformable areas 104, 106 is lower than the temperature in the reformable area 102.
  • the average temperature in the non-reformable areas 104, 106 is approximately equal to or near temperature To.
  • the average temperature could be within To +/- 15°C. This may mean that the non-reformable areas 104, 106 are not heated or that the non-reformable areas 104, 106 are locally heated to maintain their temperatures at or near temperature To.
  • the temperature of the reformable area 102 starts to drop and will eventually converge with that of the non-reformable areas 104, 106, e.g., at temperature To.
  • Fig. 2c shows a heater 212 (a plurality of heaters could be used if needed) directing heat to the reformable area 102 from time to to time t2 (in Fig. 3).
  • the heaters 212 are configured to provide focused heating to the reformable area 102 so that the desired differentiation in temperatures between the reformable area 102 and the non-reformable areas 104, 106 from time tO to time t2, as described above, can be maintained.
  • This differentiation in temperatures between the reformable and non-reformable areas, and therefore differentiation in glass material viscosities between the reformable and non-reformable areas, is used to limit any deformation of the glass material to the reformable area 102.
  • such focused heating may be convective heating provided by a gas burner with a nozzle for focusing the heat from the gas burner or radiative heating provided by a resistive heater with optical element(s), such as a high-temperature elliptical mirror, for focusing the heat from the resistive heater.
  • a resistive heater with optical element(s) such as a high-temperature elliptical mirror
  • Reforming of the reformable area 102 takes place from time to to time te (in Fig. 3). From time to to time ti (in Fig. 3), reforming of the reformable area 102 is solely due to thermal influence. During this period, the reformable area 102 may begin to sag due to gravity. At time ti, when the reformable area 102 is at
  • mechanical reforming involves contacting a pusher with the non-reformable area 104 and pushing on the non-reformable area 104 in order to produce a predetermined bend in the reformable area 102. If a bend had already been formed in the reformable area 102 due to sagging, the mechanical reforming will increase the bend angle to the predetermined or desired bend angle. With this mechanical reforming, which will be further described below, quite large bend angles, such as bend angles greater than 90 degrees, can be achieved. A different strategy is used for mechanical reforming when the reformable area is edge-located. This different strategy will also be described below.
  • a numerical value or range of values has not been specified for temperature Ti because temperature Ti will depend on the composition of the glass material and whether any substantial sagging of the glass in the reformable area 102 (in Fig. 2c) is desired before mechanical reforming.
  • Temperature Ti is high enough to allow deformation of the reformable area 102.
  • the viscosity of the glass material at temperature Ti is at least one order of magnitude (i.e., at least 10 times) lower than the viscosity of the glass material at temperature To.
  • the viscosity of the glass material at temperature Ti is not greater than 10 9 Poise. In another embodiment, the viscosity of the glass material is in a range from 10 8 Poise to 10 9 Poise. In another embodiment, the temperature Ti is in a forming temperature range of the glass material. In another embodiment, the temperature Ti is between the softening point and the annealing point of the glass material. In another embodiment, the temperature Ti is at least 10°C below the softening point of the glass material.
  • the temperature of the reformable area 102 is allowed to drop down to temperature To or to the same temperature as the non-reformable areas 104, 106.
  • the sheet of glass material with the predetermined bend in the reformable area 102 may be described as a shaped article.
  • the shaped article can be allowed to cool down further to a temperature below temperature To.
  • the shaped article may be allowed to cool down further to a temperature at which the viscosity of the glass material is approximately 10 13 Poise or greater.
  • various processes may be applied to the shaped article. For example, the shaped article may be annealed.
  • the edge(s) of the shaped article may be finished, trimmed, or contoured, to achieve a final size or shape.
  • the shaped article may be subjected to an ion-exchange process for strengthening.
  • An anti-smudge coating may be applied on a surface of the shaped article.
  • Fig. 4a shows a mechanical reforming tool 400 for mechanically reforming an inwardly-located reformable area of a sheet of glass material, such as reformable area 102 in Fig. la.
  • the mechanical reforming tool 400 includes a curved-contact pusher 402.
  • the curved-contact pusher 402 has an elongated pusher body 404 with a curved surface 405 for contacting a sheet of glass material.
  • the curved surface 405 is convex.
  • the curved surface 405 is made of or plated with a material that would not stick to the glass material at reforming temperatures. This may be the same types of high temperature materials described above for the support 200 (in Fig. 2a).
  • the mechanical reforming tool 400 includes an actuator 408 having a movable arm 410.
  • Prongs 412, 414 couple the movable arm 410 to opposing sides of the elongated pusher body 404.
  • the joints between the prongs 412, 414 and the elongated pusher body 404 may be fixed or rotatable.
  • the actuator 408 can be controlled to extend the pusher 402 to contact a surface of the sheet of glass material and then apply a force to the surface of the sheet of glass material. This force can be used to form a bend in a reformable area of the sheet of glass material.
  • the actuator 408 is a linear actuator so that the pusher 402 travels along a linear path during the previously mentioned extension of the pusher 402.
  • the actuator 408 and movable arm 410 constitute a linear force control system and can be implemented in a variety of ways.
  • the actuator 408 and movable arm 410 could be a pneumatic cylinder.
  • Figs. 4b and 4c show how the mechanical reforming tool 400 is used to form a bend in the reformable area 102.
  • the reformable area 102 has already sagged down due to gravity, and an initial bend 120 has already been formed in the reformable area 102 due to the sagging.
  • this initial bend 120 may have an initial bend angle 122 in a range from about 70 degrees to about 90 degrees.
  • Mechanical reforming starts at or after time ti by bringing the pusher 402 into opposing relation to the non-reformable area 104 and then in contact with the non-reformable area 104.
  • Additional extension of the actuator movable arm 410 along a linear path maintains contact between the pusher contact surface 405 and the non-reformable area 104 and applies a pushing force to the non-reformable area 104. As the pushing force is applied to the non- reformable area 104, the bend angle in the reformable area 102 increases.
  • Fig. 4c shows that the actuator 408 advances the pusher 402 against the non-reformable area 104 along a linear path until a predetermined bend angle 124 has been formed in the reformable area 102.
  • Time t2 (in Fig. 3) is selected to coincide with when the predetermined bend angle 124 would be formed in the reformable area 102.
  • the actuator 408 stops advancing the pusher 402 against the non-reformable area 104, e.g., by stopping further extension or driving of the movable arm 410. From time t2 to time ta (in Fig.
  • the actuator 408 holds the pusher 402 in contact with the non-reformable area 104, thereby applying a resisting force to the non-reformable area 104.
  • This resisting force does not result in additional bending in the reformable area 102.
  • heating of the reformable area 102 is turned off.
  • the reformable area 102 has cooled down enough to hold the predetermined bend angle 124.
  • the actuator 408 removes the pusher 402 from contact with the non-reformable area 104, e.g., by retracting the movable arm 410.
  • the mechanical reforming tool 400 described above can also be used to form a bend in the reformable area 102 when there is no initial bend or only a small bend in the reformable area 102 at time ti (in Fig. 3).
  • repositioning may be achieved automatically by mounting the actuator 408 on a rotary stage (e.g., 420 in Fig.
  • Fig. 5a shows another mechanical reforming tool 500 for mechanically reforming a sheet of glass material.
  • the mechanical reforming tool 500 includes a flat-contact pusher 502, an actuator 504, and a linear-to-rotary motion guide 506 that takes linear motion from the actuator 504 and converts it into rotary motion for the flat-contact pusher 502, enabling the flat-contact pusher 502 to travel along a circular path to impart a bend to the sheet of glass material in the reformable area.
  • the flat-contact pusher 502 has an elongated body 505 with a flat bottom surface 505a (better seen in Fig. 5b) for contacting the sheet of glass material.
  • the flat bottom surface 505a should be narrow such that contact with the sheet of glass material is minimized.
  • the leading edge 505b and trailing edge 505c of the elongated body 505 may each have a round shape, as shown, or may each have a different shape, e.g., a flat or beveled shape.
  • the top surface 505d of the elongated body 505 may have a flat shape, as shown, or may have a different shape, e.g., a curved or beveled shape.
  • the mechanical reforming tool 500 may include a non-flat-contact pusher in lieu of the flat-contact pusher 502.
  • a curved-contact pusher such as shown at 402 in Fig. 4a, may be used in place of the flat-contact pusher 502.
  • the linear-to-rotary motion guide 506 has supports 510, 512, which are spaced apart a sufficient distance to allow the edge of a sheet of glass material to be received between them.
  • the guide 506 has angled brackets 514, 516. Corners 518, 520 of the angled brackets are coupled to the supports 510, 512 by pivoting joints 522, 524. Legs 526, 528 of the angled brackets 514, 516 are firmly attached to the ends 530, 532 of the elongated body 505, e.g., by fitting the elongated body ends 530, 532 into slots in the legs 526, 528.
  • the support is such that in the neutral position of the angled brackets 514, 516, the flat bottom surface 505a of the pusher 502 is parallel to the bases 534, 536 of the supports 510, 512.
  • the actuator 504 has a movable arm 538, which is firmly attached to a yoke 544. Prongs 546, 548 of the yoke 544 are coupled to the legs 540, 542 via pivoting joints (only pivoting joint 548 is visible in the drawing (Fig. 5b)). Linear motion of the movable arm 538 in a direction towards the supports 510, 512 moves the angled brackets 514, 516 along a circular path, with the center of rotation of the angled brackets 514, 516 at the pivoting points 522, 524. Since the pusher 502 is coupled to the angled brackets 514, 516, the pusher 502 moves in a circular path with the angled brackets 514, 516. The movable arm 538 can continue to move linearly to result in motion of the pusher 502 along the circular path.
  • Fig. 5b shows how the mechanical reforming tool 500 is used to form a bend in an edge-located reformable area of a sheet of glass material, such as reformable area 102a in Fig. lb.
  • the sheet of glass material 100a is heated to temperature To (in Fig. 3) using a setup similar to the one shown in Fig. 2b for the sheet of glass material 100.
  • time to (in Fig. 3) local heating of the reformable area 102a of the sheet of glass material 100a starts, e.g., using the heater 212.
  • time ti in Fig.
  • the pusher 502 is advanced towards the sheet of glass material 100a until the flat bottom surface 505a makes contact with an edge area 102al of the reformable area 102a.
  • the edge area 102al where the flat surface 505a contacts the reformable area 102a can be minimized and later machined off.
  • the actuator 504 With the pusher 502 in contact with edge area 102al of the reformable area 102, the actuator 504 translates or pushes the movable arm 538 in a direction towards the supports 510, 512, along a linear path. As shown in Fig. 5c, this rotates the angled brackets 516, 514 (in Fig. 5a) about the pivot joints 524, 522 (in Fig. 5a).
  • the pusher 502 Since the pusher 502 is attached to the angled brackets 514, 516, the pusher 502 also rotates, pushing down on the edge area 102al of the reformable area 102a and causing a bend to be formed in the reformable area 102a.
  • the bend angle increases as the movable arm 538 further advances towards the supports 512, 510 (in Fig. 5a).
  • the movable arm 538 may advance until the angled brackets 514, 516 reach the stop surfaces 554 (552 in Fig. 5a).
  • the bend can be formed very close to an outermost edge of the sheet of glass material 100a coinciding with the reformable area 102a, e.g., within 20 mm of the outermost edge (which is shown as 101a in Fig. lb).
  • Rotation of the pusher 502 occurs from time ti to time t2 (in Fig. 3). At or shortly after time t2, rotation of the pusher 502 and local heating of the reformable area 102a are stopped. From time t2 to time t 3 , contact between the flat bottom surface 505 of the pusher 502 and the edge of the reformable area 102a is maintained so that the bend formed in the reformable 102a via the pusher 502 is reinforced. However, the pusher 502 is not rotated during this time so that additional bending does not occur. After time t3, the contact between the pusher 502 and the edge of the reformable area 102a is released or removed. This may be achieved by retracting the movable arm 538 so that the pusher 502 rotates back to its neutral position.
  • the mechanical reforming tool 500 may also be used to form a bend in an inwardly-located reformable area where an initial bend has not been formed in the reformable area or where only a small bend has been formed in the reformable area.
  • One modification may be to replace the flat-contact pusher 502 with a curved-contact pusher, such as pusher 402 in Fig. 4a. Then, the range of motion of the angled brackets 514, 516 can be increased by relocating and resizing the stop surfaces 552, 554.
  • the curved surface of the curved-contact pusher would be brought into contact with the non-reformable area of the sheet of glass material and swinging of the angled brackets would move the curved-contact pusher along a circular path, while the curved-contact pusher is in contact with the non-reformable area, thereby creating a bend in the reformable area.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

La présente invention se rapporte à une région reformable et à une région non reformable d'une feuille de matériau en verre qui sont chauffées à une première température correspondant à une première viscosité. La région reformable est ensuite chauffée localement à une seconde température correspondant à une seconde viscosité, la seconde viscosité étant inférieure à la première viscosité. Un pli est formé dans la région reformable pendant le chauffage local de la région reformable par la mise en contact d'un premier poussoir avec la région non reformable et par le déplacement du premier poussoir le long d'une voie linéaire pour appliquer une force de poussée à la région non reformable qui donne lieu au pli dans la région reformable ou par la mise en contact d'un second poussoir avec une région de bord de la région reformable et par la rotation du poussoir le long d'une voie circulaire pour appliquer une force de poussée à la région de bord de la région reformable qui donne lieu au pli dans la région reformable.
PCT/US2012/059663 2011-10-13 2012-10-11 Procédé et système de reformage thermomécanique et outil de reformage mécanique WO2013055861A1 (fr)

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CN201280062038.0A CN104203847B (zh) 2011-10-13 2012-10-11 热机械再成型方法和系统以及机械再成型工具

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US201161546687P 2011-10-13 2011-10-13
US61/546,687 2011-10-13

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013184893A1 (fr) * 2012-06-08 2013-12-12 Corning Incorporated Procédé et appareil de courbure d'une feuille de verre et boîtier de dispositif électronique
US9376337B2 (en) 2012-06-14 2016-06-28 Nippon Electric Glass Co., Ltd. Method for producing glass sheet with bent portion and glass sheet with bent portion
EP2930155A4 (fr) * 2012-12-07 2016-08-10 Nippon Electric Glass Co Procédé de fabrication de plaque de verre renforcée présentant des sections incurvées, et plaque de verre renforcée présentant des sections incurvées
US10077203B2 (en) * 2015-08-31 2018-09-18 Samsung Display Co., Ltd. Apparatus for forming window glass and method of manufacturing electronic device including window
US10843955B2 (en) 2018-06-25 2020-11-24 Hi-Nano Optoelectronics Co., Ltd. Non-contact shaping device and method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110028230B (zh) * 2019-04-23 2021-11-09 重庆立玻光电科技有限公司 曲面玻璃加工方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4286980A (en) 1979-05-23 1981-09-01 Nissan Motor Co., Ltd. Method and apparatus for forming bent plate glass
JPS6321229A (ja) * 1986-07-11 1988-01-28 Nippon Kiden Kogyo Kk ガラス板の屈曲方法及び屈曲装置
US5167689A (en) 1990-03-20 1992-12-01 Saint-Gobain Vitrage International C/O Saint-Gobain Recherche Process for bending glass sheets
US5322539A (en) * 1992-06-26 1994-06-21 Desert Glassworks, Inc. Quartz tank member and method of production thereof
US6240746B1 (en) 1997-04-04 2001-06-05 Asahi Glass Company Ltd. Glass plate bending method and apparatus
US6422040B1 (en) 2000-06-15 2002-07-23 Glasstech, Inc. Method for forming glass sheets
WO2004087590A2 (fr) 2003-03-26 2004-10-14 Saint-Gobain Glass France Procede et dispositif de bombage de feuilles de verre par pressage et aspiration
WO2005042420A1 (fr) * 2003-10-28 2005-05-12 Schott Ag Procede pour produire une piece moulee en verre comprenant au moins une branche pliee en u
EP2457881A1 (fr) * 2010-11-30 2012-05-30 Corning Incorporated Procédé et appareil pour plier une feuille de matériau pour obtenir un article formé

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4286980A (en) 1979-05-23 1981-09-01 Nissan Motor Co., Ltd. Method and apparatus for forming bent plate glass
JPS6321229A (ja) * 1986-07-11 1988-01-28 Nippon Kiden Kogyo Kk ガラス板の屈曲方法及び屈曲装置
US5167689A (en) 1990-03-20 1992-12-01 Saint-Gobain Vitrage International C/O Saint-Gobain Recherche Process for bending glass sheets
US5322539A (en) * 1992-06-26 1994-06-21 Desert Glassworks, Inc. Quartz tank member and method of production thereof
US6240746B1 (en) 1997-04-04 2001-06-05 Asahi Glass Company Ltd. Glass plate bending method and apparatus
US6422040B1 (en) 2000-06-15 2002-07-23 Glasstech, Inc. Method for forming glass sheets
WO2004087590A2 (fr) 2003-03-26 2004-10-14 Saint-Gobain Glass France Procede et dispositif de bombage de feuilles de verre par pressage et aspiration
WO2005042420A1 (fr) * 2003-10-28 2005-05-12 Schott Ag Procede pour produire une piece moulee en verre comprenant au moins une branche pliee en u
EP2457881A1 (fr) * 2010-11-30 2012-05-30 Corning Incorporated Procédé et appareil pour plier une feuille de matériau pour obtenir un article formé

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013184893A1 (fr) * 2012-06-08 2013-12-12 Corning Incorporated Procédé et appareil de courbure d'une feuille de verre et boîtier de dispositif électronique
US9611165B2 (en) 2012-06-08 2017-04-04 Corning Incorporated Method and apparatus for bending a glass sheet and an electronic device casing
US9376337B2 (en) 2012-06-14 2016-06-28 Nippon Electric Glass Co., Ltd. Method for producing glass sheet with bent portion and glass sheet with bent portion
EP2930155A4 (fr) * 2012-12-07 2016-08-10 Nippon Electric Glass Co Procédé de fabrication de plaque de verre renforcée présentant des sections incurvées, et plaque de verre renforcée présentant des sections incurvées
US10077203B2 (en) * 2015-08-31 2018-09-18 Samsung Display Co., Ltd. Apparatus for forming window glass and method of manufacturing electronic device including window
US10843955B2 (en) 2018-06-25 2020-11-24 Hi-Nano Optoelectronics Co., Ltd. Non-contact shaping device and method

Also Published As

Publication number Publication date
CN104203847A (zh) 2014-12-10
TW201326064A (zh) 2013-07-01
CN104203847B (zh) 2017-09-22
TWI591027B (zh) 2017-07-11

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