WO2010099278A2 - Appareil pour former du verre avec guides de bordures et procédés - Google Patents

Appareil pour former du verre avec guides de bordures et procédés Download PDF

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Publication number
WO2010099278A2
WO2010099278A2 PCT/US2010/025341 US2010025341W WO2010099278A2 WO 2010099278 A2 WO2010099278 A2 WO 2010099278A2 US 2010025341 W US2010025341 W US 2010025341W WO 2010099278 A2 WO2010099278 A2 WO 2010099278A2
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WO
WIPO (PCT)
Prior art keywords
pair
edge
edge director
downstream
along
Prior art date
Application number
PCT/US2010/025341
Other languages
English (en)
Other versions
WO2010099278A3 (fr
Inventor
Antoine Bisson
Xavier Tellier
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.)
Filing date
Publication date
Application filed by Corning Incorporated filed Critical Corning Incorporated
Priority to CN201080015883.3A priority Critical patent/CN102369166B/zh
Priority to JP2011552148A priority patent/JP5551190B2/ja
Publication of WO2010099278A2 publication Critical patent/WO2010099278A2/fr
Publication of WO2010099278A3 publication Critical patent/WO2010099278A3/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06—Forming glass sheets
    • C03B17/064—Forming glass sheets by the overflow downdraw fusion process; Isopipes therefor
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B18/00—Shaping glass in contact with the surface of a liquid
    • C03B18/02—Forming sheets
    • C03B18/04—Changing or regulating the dimensions of the molten glass ribbon
    • C03B18/06—Changing or regulating the dimensions of the molten glass ribbon using mechanical means, e.g. restrictor bars, edge rollers
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06—Forming glass sheets
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B18/00—Shaping glass in contact with the surface of a liquid
    • C03B18/02—Forming sheets
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B18/00—Shaping glass in contact with the surface of a liquid
    • C03B18/02—Forming sheets
    • C03B18/04—Changing or regulating the dimensions of the molten glass ribbon

Definitions

  • the present invention relates generally to apparatus and methods for forming glass, and more particularly, to apparatus and methods for forming glass with edge directors.
  • a first aspect of the present disclosure relates to an apparatus for downwardly drawing sheet glass comprising: a forming wedge including a pair of inclined surface portions extending between opposed ends of the forming wedge and converging along a downstream direction to form a root, wherein a draw plane extends through the root; and an edge director positioned at each of the opposed ends, each edge director including a first pair of surfaces that each extend from a corresponding one of the pair of inclined surface portions, a second pair of surfaces extending from the first pair of surfaces and converging toward a portion of the draw plane downstream from the root, and a downstream structure extending with respect to the second pair of surfaces and downstream from the root.
  • the draw plane bisects the root.
  • the downstream structure extends along the draw plane. [0009] In certain embodiments of the first aspect of the present disclosure, the downstream structure comprises a downstream edge.
  • the downstream structure further comprises a blade defining the downstream edge.
  • the blade extends along the draw plane.
  • the blade includes a substantially triangular shape.
  • the second pair of surfaces each converge at a first angle relative to the draw plane and the downstream structure converges at a second angle relative to the draw plane, wherein the second angle is less than the first angle.
  • the second angle is from 2-12 degrees, in certain embodiments 2-10 degrees, in certain embodiments 4-10 degrees, in certain embodiments 6-10 degrees, in certain embodiments 8-10 degrees.
  • the first pair of surfaces of each edge director are each substantially planar.
  • the first pair of surfaces of each edge director are each substantially concave.
  • the second pair of surfaces of each edge director are each substantially planar.
  • each of the first pair of surfaces of each edge director is each substantially concave.
  • each of the first pair of surfaces of each edge director includes a transverse width that increases in the downstream direction.
  • a second aspect of the present disclosure relates to a method for forming glass using an apparatus according to the first aspect of the present disclosure described summarily above and in detail below.
  • the method relates to forming a glass sheet with a forming wedge including a pair of inclined surface portions extending between opposed ends of the forming wedge and converging along a downstream direction to form a root, a first edge director positioned at one of the opposed ends, and a second edge director positioned at the other of the opposed ends, the method comprising the steps of: forming a glass ribbon of flowing molten glass stream over each of the pair of inclined surface portions; flowing the molten glass streams along a first pair of lateral edges of the glass ribbons over corresponding first surfaces of the first edge director to stretch a first pair of peripheral regions of the glass ribbons along each of the first pair of lateral edges; flowing the molten glass streams along a second pair of lateral edges of the glass ribbons over corresponding first surfaces of the second edge director to
  • a third aspect of the preset disclosure relates to a method for forming glass using an apparatus according to the first aspect of the present disclosure described summarily above and in detail below comprising the steps of: forming a molten glass ribbon of flowing molten glass stream over each of the pair of inclined surface portions; and flowing the molten glass streams along each of a pair of opposed lateral edges of each molten glass ribbon with respect to a corresponding edge director such that each edge director stretches a peripheral region of the glass ribbons along each corresponding lateral edge, directs the flow of the molten glass stream along each corresponding lateral edge into a converging flow direction, and subsequently, reduces a flow angle between each corresponding converging flow direction and the downstream direction before the molten glass stream leave the corresponding edge director.
  • FIG. 1 a partial schematic side view of an apparatus for forming glass with edge directors incorporating example aspects of the present invention
  • FIG. 2 is a sectional view of the apparatus along line 2-2 of FIG. 1;
  • FIG. 3A is a front view of an edge director illustrated in FIG. 1 mounted on a forming wedge of the example apparatus;
  • FIG. 3B is a rear view of the edge director illustrated in FIG. 1;
  • FIG. 3 C is a top view of the edge director of FIG. 1;
  • FIG. 3D is a bottom view of the edge director of FIG. 1;
  • FIG. 3E is a side view of the edge director of FIG. 1;
  • FIG. 4 is a side view of another example edge director incorporating aspects of the present invention.
  • FIG. 5A is a front view of another example edge director incorporating aspects of the present invention.
  • FIG. 5B is a rear view of the edge director of FIG. 5A;
  • FIG. 5C is a top view of the edge director of FIG. 5A;
  • FIG. 5D is a bottom view of the edge director of FIG. 5A;
  • FIG. 5E is a side view of the edge director of FIG. 5A;
  • FIG. 5F is a shaded bottom perspective view of the edge director of FIG. 5A;
  • FIG. 6A is a side view of another example edge director incorporating aspects of the present invention.
  • FIG. 6B is a bottom view of the edge director of FIG. 6A;
  • FIG. 6C is a side perspective view of the edge director of FIG. 6A.
  • FIG. 6D is a shaded bottom perspective view of the edge director of FIG.
  • Example embodiments that incorporate one or more aspects of the present invention are described and illustrated in the drawings. These illustrated examples are not intended to be a limitation on the present invention. For example, one or more aspects of the present invention can be utilized in other embodiments and even other types of devices. Moreover, certain terminology is used herein for convenience only and is not to be taken as a limitation on the present invention. Still further, in the drawings, the same reference numerals are employed for designating the same elements. [0042] Aspects of the present invention can be used with various apparatus for drawing sheet glass. For example, aspects of the invention can optionally be practiced with apparatus disclosed in U.S. Pat. No. 3,451,798, U.S. Patent No. 3,537,834 or United States Patent No. 7,409,839 that are both herein incorporated by reference in their entirety.
  • FIGS. 1 and 2 illustrate aspects of an apparatus 10 for downwardly drawing sheet glass 500.
  • the example apparatus 10 comprises a forming wedge 20 including a pair of inclined surface portions 22a, 22b extending between opposed ends 26a, and 26b of the forming wedge 20.
  • the pair of inclined surface portions 22a, 22b converge along a downstream direction 28 to form a root 30.
  • a draw plane 32 extends through the root 30 wherein the sheet glass 500 may be drawn in the downstream direction 28 along the draw plane 32.
  • the draw plane 32 can bisect the root 30 although the draw plane 32 may extend at other orientations with respect to the root 30.
  • an edge director can be positioned at each of the opposed ends of the forming wedge.
  • a first edge director 100 can be positioned at a first end 26a and a second identical edge director 100 can be positioned at a second end 26b.
  • Providing identical edge directors can be beneficial to provide a uniform glass ribbon although the edge directors may have different configurations in further examples.
  • the edge director 100 can include a pair of upper portions 110a, 110b that may be joined together by a lower portion 120. Joining the upper portions together can be beneficial to simplify assembly of the edge director 100 to the forming wedge 20.
  • the upper portions 110a, 110b may be provided separately.
  • the edge director 100 can be separate from one another and assembled independently to each of the pair of inclined surface portions 22a, 22b of the forming wedge 20. With certain configurations, providing upper portions that are not joined may simplify manufacturing of the edge directors.
  • the pair of upper portions 110a, 110b of the edge director 100 can include a corresponding pair of first surfaces 112a, 112b.
  • the first pair of surfaces that each extend from a corresponding one of the pair of inclined surface portions.
  • the first surface 112a can extend from a first inclined surface portion 22a and the second surface 112b can extend from the second inclined surface portion 22b of the wedge 20.
  • the first pair of surfaces 112a, 112b can be substantially planar although the surfaces can be substantially concave and/or include other surface characteristics in further examples.
  • the first pair of surfaces 112a, 112b are identical to one another although the surfaces may have different configurations in further examples.
  • each of the first pair of surfaces can include a transverse width "W" that increases in the downstream direction 28.
  • the first surfaces can have a first transverse width "Wi” and a second downstream transverse width "W2" that is greater than the first transverse width "Wi.”
  • the transverse width "W” can increase in a substantially constant manner to define a linear edge 114 configured to follow the profile of the corresponding inclined surface portion of the wedge 20. It will be appreciated that the transverse width of embodiments herein may increase in nonlinear fashion in further examples.
  • the edge director 100 can further include a second pair of surfaces 120a, 120b extending from the first pair of surfaces 112a, 112b and converging toward a portion of the draw plane 32 downstream from the root 30.
  • the second pair of surfaces 120a, 120b can be substantially planar although the surfaces can be substantially concave and/or include other surfaces characteristics in further examples.
  • the second pair of surfaces 120a, 120b can be substantially identical to one another although the surfaces may have different configurations in further examples.
  • the edge director 100 can still further include and a downstream structure extending with respect to the second pair of surfaces 120a, 120b and downstream from the root 30.
  • the downstream structure of the edge director 100 can comprise an optional blade 130 extending with respect to the second pair of surfaces 120a, 120b.
  • the blade 130 if provided, can comprise a first surface 130a extending from the first surface 120a of the second pair of surface and a second surface 130b extending from the second surface 120b of the second pair of surfaces.
  • the first and second surfaces 120a, 120b of the blade 130, as well as optional blades of other embodiments discussed throughout this application can comprise substantially planar surfaces although the surfaces of the blade can comprise concave, convex and/or other surface topographies in further examples.
  • the downstream structure can also extend along the draw plane 32.
  • the blade may be offset from the draw plane 32 and/or angled from the draw plane 32 in further examples.
  • one or more blades may be provided with surfaces that converge together along the draw plane 32.
  • each outer blade surface may extend at an angle of less than 2 degrees with respect to one another although other angles may be used in further examples, hi the illustrated example, a single blade 130 is provided each surface 130a, 130b extending at a zero degree angle from the draw plane 32.
  • the downstream structure of the edge director 100 can include a downstream edge 132 extending with respect to the second pair of surfaces 120a, 120b and downstream of the root 30.
  • the blade 130 defines the downstream edge 132 that can optionally include a first portion 132a and a second portion 132b located at an angle with respect to one another. As shown the angle between the first portion 132a and the second portion 132b is greater than 90 degrees although right or acute angles may be provided in further examples.
  • the blade 130 can include a third side 132c that may be substantially linear although nonlinear profiles may be provided in further examples.
  • the downstream edge may be provided with various profiles such that the blade forms various shapes depending on the particular application.
  • first and second portions 132a, 132b of the downstream edge 132 can be substantially linear although nonlinear profiles may also be provided in further examples.
  • first and second portions 132a, 132b of the downstream edge 132 and the third side 132c of the blade 130 can form a triangle.
  • the blade 130 can optionally include a triangular shape although other shapes can be provided in further examples.
  • the blade can include other polygonal (e.g., rectangular), curvilinear such as semielliptical (e.g., semicircular), and/or other shapes.
  • the blade 130 is one example configuration that can be used to change the molten glass flow path from the second pair of surfaces 120a, 120b.
  • the second pair of surfaces 120a, 120b when viewed along a plane perpendicular to the draw plane 32, the second pair of surfaces 120a, 120b each converge at a first angle "Ai" relative to the draw plane 32 and the blade 130 converges at a second angle "B" relative to the draw plane.
  • the second angle "B" can be less than the first angle "Ai”.
  • the second angle “B” can be from zero to 12 degrees although other angles, such as 2°-12°, 2°-10°, 4°-10°, 6°-10°, and 8°-10°, such as 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11° may be provided in further examples.
  • the edge directors 100 can be mounted to the wedge 20 by engaging an inner surface portion 116a of the first upper portion 110a with the first inclined surface portion 22a of the wedge 20.
  • an inner surface portion 116b of the second upper portion 110b can be engaged with the second inclined surface portion 22b of the wedge 20.
  • Each opposed end 26a, 26b can include a retaining block 12 designed to help laterally position the corresponding edge director 100 in place.
  • optional retaining blocks 12 can include a pair of planar surface 14 (only one shown in FIG. 1) that straddle the wedge 20. The planar surfaces 14 are designed to abut corresponding planar surfaces 114a, 114b of the pair of upper portions 110a, 110b of the edge director 100. Once positioned, the edge directors 100 can be fastened in the position shown. [0055] A method for forming glass will now be described with respect to an apparatus 10 including the example edge directors 100.
  • FIGS. 1 and 2 methods of forming glass with the example apparatus 10 including the edge director 100 is schematically illustrated.
  • FIG. 2 illustrates example methods being performed with the first edge director 100 located at the first end 26a of the wedge 20.
  • FIG. 2 is also representative of a cross section taken at the opposite direction illustrated in FIG. 1.
  • FIG. 2 also represents example methods being performed with the second edge director 100 located at the second end 26b.
  • example methods can include the steps of forming a molten glass ribbon of flowing molten a glass stream over each of the pair of inclined surface portions. For example, as shown in FIG. 2, a central portion 512 of a first molten glass ribbon 510 flows over the first inclined surface portion 22a of the wedge 20. Likewise, a central portion 522 of a second molten glass ribbon 520 flows over the second inclined surface portion 22b of the wedge 20.
  • the methods further include the step of flowing the molten glass streams along a first pair of lateral edges 514a, 524a of the molten glass ribbons 510, 520 over the corresponding first surfaces 112a, 112b of the first edge director to stretch the peripheral region of the glass ribbon along each of the first pair of lateral edges 514a, 524a.
  • stretch means that the surface area of the glass ribbon affected by the edge director is increased relative to an apparatus without the edge director.
  • One of a second pair of lateral edges of the molten glass ribbons is referenced as 514b in FIG. 1 wherein the other of the pair of lateral edges is hidden.
  • FIG. 2 also provides a representation of flowing the molten glass streams along the second pair of lateral edges (see 514a, 524a) of the molten glass ribbons 510, 520 over corresponding first surfaces 112a, 112b of the second edge director to stretch the peripheral region of the glass ribbon along each of the second pair of lateral edges.
  • first pair of surfaces 112a, 112b extend from a corresponding one of the pair of inclined surface portions 22a, 22b
  • the surface area of travel increases in the downward direction, thereby stretching out the edge portions of the corresponding glass ribbon to stretch the peripheral region of the glass ribbon along each of the pair of lateral edges.
  • the method also includes the step of directing each pair of lateral edges into a converging angle relative to one another.
  • each of the first pair of lateral edges 514a, 524a includes a first flow direction 516a, 526a extending down along the corresponding first surfaces 112a, 112b.
  • the second pair of surfaces 120a, 120b encourages the molten glass streams to flow along the lateral edges 514a, 524a in second flow directions 516b, 526b at a converging angle A2 relative to one another.
  • the method further includes reducing the converging angle between each pair of lateral edges before the glass stream along each pair of lateral edges leaves the corresponding edge director. For example, as shown, as shown in FIG.
  • the respective surfaces 130a, 130b of the blade 130 cause the lateral edges 514a, 524a to flow in third flow directions 516c, 526c at a third angle "B" relative to one another.
  • the third angle "B" can be zero degrees although other orientations may be provided in further examples.
  • the method is also provided forming glass with the forming wedge 20 including the pair of inclined surface portions 22a, 22b extending between opposed ends 26a, 26b of the forming wedge 20 and converging along the downstream direction 28 to form the root 30.
  • the edge director 100 is positioned at each end of the opposed ends 26a, 26b.
  • the method comprises the steps of forming a molten glass ribbon of a flowing molten glass stream over each of the pair of inclined surface portions. For example, a central portion 512, 522 of the molten glass ribbon 510, 520 flows over each of the pair of inclined surface portions 22a, 22b.
  • the method further includes the step of flowing the molten glass stream along each of the pair of opposed lateral edges 514a, 514b of each molten glass ribbon 510, 520 with respect to a corresponding edge director 100.
  • each edge director 100 stretch the peripheral region of the glass ribbon along each corresponding lateral edge, directs the glass stream along each corresponding lateral edge into a converging flow direction 516b, 526b, and subsequently, reduces a flow angle "A3" between each corresponding converging flow direction and the downstream direction before the glass stream along each lateral edge leaves the corresponding edge director.
  • FIG. 4 illustrates a side view of another example edge director 200 that has similar and/or identical components to the edge director 100.
  • the edge director 200 includes a blade 230 similar to the blade 130 described above. However, the blades 130, 230 have different triangular shapes.
  • blade 130 of edge director 100 includes a second portion 132b of the downstream edge 132 being substantially horizontal, substantially parallel to the root 30, and/or substantially perpendicular to the downstream direction 28.
  • the blade 230 includes a downstream edge 132 with a first portion 232a and a second portion 232b wherein the second portion 232b is not horizontal and oriented at an oblique angle an angle with respect to the root 30 and the downward direction 28.
  • the various triangular shapes shown with the blades 130, 230 may be desirable in certain applications although, as mentioned above, different shaped blades may be employed in further examples.
  • FIGS. 5A-5F illustrate another example edge director 300 in accordance with still further aspects of the present invention.
  • the edge director 300 can have identical or similar characteristics when compared to the edge director 100.
  • the edge director 300 can include a pair of upper portions 310a, 310b that may optionally be joined together by a lower portion 320.
  • the pair of upper portions 310a, 310b of the edge director 300 can include a corresponding pair of first surfaces 312a, 312b.
  • the edge directors 300 can be similarly mounted to the wedge 20 such that the first pair of surfaces each extends from a corresponding one of the pair of inclined surface portions 22a, 22b of the wedge 20.
  • the first surface 312a can extend from a first inclined surface portion 22a and the second surface 312b can extend from the second inclined surface portion 22b of the wedge 20.
  • the first pair of surfaces 312a, 312b can be substantially concave although the surfaces can be substantially planar and/or include other surface characteristics in further examples.
  • the first pair of surfaces 312a, 312b are identical to one another although the surfaces may have different configurations in further examples.
  • the edge director 300 can further include a second pair of surfaces 320a, 320b extending from the first pair of surfaces 312a, 312b and converging toward a portion of the draw plane 32 downstream from the root 30. As shown, for example in FIG.
  • the second pair of surfaces 320a, 320b can be substantially concave although the surfaces can be substantially planar and/or include other surfaces characteristics in further examples. Moreover, as show, the second pair of surfaces 320a, 320b can be substantially identical to one another although the surfaces may have different configurations in further examples. [0065]
  • the edge director 300 can still further include and a downstream structure extending with respect to the second pair of surfaces 320a, 320b and downstream from the root 30. As shown, the downstream structure of the edge director 300 can comprise an edge 332 extending with respect to the second pair of surfaces 320a, 320b.
  • the edge 332 can comprise a junction between the converging second pair of surfaces 320a, 320b without a blade although a blade may be incorporated in further examples. As shown in FIGS. 5A and 5E, the edge 332 can be substantially linear although other shapes may be provided in further examples. Moreover, as shown in FIG. 5E, the edge 332 can extend downwardly and outwardly with respect to the downstream direction 28. The downstream structure, such as the illustrated edge 332, can also extend along the draw plane 32. In alternative embodiments, the edge may be offset from the draw plane 32.
  • the method of forming glass with the edge directors 300 can be similar as described with respect to the apparatus 10 including the example edge directors 100. However, due to the concave nature of the first surfaces 312a, 312b, and the second surfaces 320a, 320b, a different flow pattern may be achieved as the molten glass streams in the glass ribbons flow over the corresponding surfaces. Thus, a nonlinear or other profile flow direction may be achieved as the edge flows over each of the concave surfaces.
  • the method further includes reducing the converging angle between each pair of lateral edges before the glass stream along each pair of lateral edges leaves the corresponding edge director. Indeed, the molten glass streams travel along the lateral edges over the second surfaces 320a, 320b toward the edge 332.
  • FIGS. 6A-6D illustrate another example edge director 400 in accordance with still further aspects of the present invention.
  • the edge director 400 can have identical or similar characteristics when compared to the edge directors 100, 200 and 300.
  • the edge director 400 can include a pair of upper portions 410a, 410b that may optionally be joined together by a lower portion 420.
  • the pair of upper portions 410a, 410b of the edge director 100 can include a corresponding pair of first surfaces 412a, 412b.
  • the first surface 412a can extend from a first inclined surface portion 22a and the second surface 412b can extend from the second inclined surface portion 22b of the wedge 20.
  • the first pair of surfaces 412a, 412b can be substantially concave although the surfaces can be substantially planar and/or include other surface characteristics in further examples.
  • the edge director 100 can further include a second pair of surfaces 420a, 420b extending from the first pair of surfaces 412a, 412b and converging toward a portion of the draw plane 32 downstream from the root 30.
  • the second pair of surfaces 420a, 420b can be substantially concave although the surfaces can be substantially planar and/or include other surfaces characteristics in further examples.
  • the second pair of surfaces 420a, 420b can be substantially identical to one another although the surfaces may have different configurations in further examples.
  • the edge director 400 can still further include and a downstream structure extending with respect to the second pair of surfaces 420a, 420b and downstream from the root 30.
  • the downstream structure of the edge director 400 can comprise an optional blade 430 extending with respect to the second pair of surfaces 420a, 420b.
  • the blade 430 if provided, can be similar or identical to the blade 130 of the edge director 100 or the blade 230 of the edge director 200.
  • the downstream structure can also extend along the draw plane 32.
  • the blade may be offset from the draw plane 32 and/or angled from the draw plane 32 in further examples.
  • one or more blades may be provided with surfaces that converge together along the draw plane 32.
  • each outer blade surface may extend at an angle of less than 2 degrees with respect to one another although other angles may be used in further examples, hi the illustrated example, a single blade 430 is provided each surface of the blade extends at a zero degree angle from the draw plane 32.
  • the downstream structure of the edge director 400 can include a downstream edge 432 extending with respect to the second pair of surfaces 420a, 420b and downstream of the root 30.
  • the blade 430 defines the downstream edge 432 that can optionally include a first portion 432a and a second portion 432b located at an angle with respect to one another. As shown the angle between the first portion 432a and the second portion 432b is greater than 90 degrees although right or acute angles may be provided in further examples.
  • the blade 430 can include a third side 432c that may be substantially linear although nonlinear profiles may be provided in further examples.
  • the downstream edge may be provided with various profiles such that the blade forms various shapes depending on the particular application.
  • first and second portions 432a, 432b of the downstream edge 432 can be substantially linear although nonlinear profiles may also be provided in further examples.
  • first and second portions 432a, 432b of the downstream edge 432 and the third side 432c of the blade 430 can form a triangle.
  • the blade 430 can optionally include a triangular shape although other shapes can be provided in further examples.
  • the blade can include other polygonal (e.g., rectangular), curvilinear such as semielliptical (e.g., semicircular), and/or other shapes.
  • the blade 430 in combination with the concave second pair of surfaces 420a, 420b is one example configuration that can be used to change the molten glass flow path.
  • a method for forming glass will now be described with respect to an apparatus 10 including the example edge directors 400.
  • the method of forming glass with the edge directors 400 can be similar as described with respect to the apparatus 10 including the example edge directors 300. Indeed, due to the concave nature of the first surfaces 412a, 412b, and the second surfaces 420a, 420b, a desirable flow pattern may be achieved as the molten glass streams in the glass ribbons flow over the corresponding surfaces. Thus, a nonlinear or other profile flow direction may be achieved as the edge flows over each of the concave surfaces.
  • the method further includes reducing the converging angle between each pair of lateral edges before the glass stream along each pair of lateral edges leaves the corresponding edge director.
  • the glass stream along each lateral edge can flow over the first surfaces 412a, 412b to stretch the peripheral region of the glass ribbon along corresponding lateral edge, flow over the second surfaces 420a, 420b to converge the flow, and subsequently, reduce the flow angle between each corresponding converging flow direction and the downstream direction as the lateral edges continue to flow downstream over the concave second surfaces 420a, 420b and meet the blade 430.

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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)
  • Surface Treatment Of Glass (AREA)
  • Electroluminescent Light Sources (AREA)
  • Ink Jet (AREA)

Abstract

L'invention porte sur un appareil pour tirer vers le bas du verre en feuille, l'appareil comprenant des guides de bordures aux extrémités opposées d'un coin de formation. Chaque guide de bordures comprend une première paire de surfaces et une seconde paire de surfaces s'étendant à partir d'une première paire de surfaces. La seconde paire de surfaces convergent vers une partie du plan d'étirage en aval d'une racine du coin de formation. Chaque guide de bordures peut en outre comprendre une structure aval s'étendant le long de la seconde paire de surfaces et en aval à partir de la racine. L'invention porte également sur des procédés pour réduire un angle associé à chaque paire de bordures latérales de rubans de verre fondu.
PCT/US2010/025341 2009-02-26 2010-02-25 Appareil pour former du verre avec guides de bordures et procédés WO2010099278A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201080015883.3A CN102369166B (zh) 2009-02-26 2010-02-25 利用边缘引导器形成玻璃的设备和方法
JP2011552148A JP5551190B2 (ja) 2009-02-26 2010-02-25 縁部誘導器を有するガラス成形装置および方法

Applications Claiming Priority (2)

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US15566909P 2009-02-26 2009-02-26
US61/155,669 2009-02-26

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WO2010099278A2 true WO2010099278A2 (fr) 2010-09-02
WO2010099278A3 WO2010099278A3 (fr) 2010-12-29

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KR (1) KR101642534B1 (fr)
CN (1) CN102369166B (fr)
TW (1) TWI458688B (fr)
WO (1) WO2010099278A2 (fr)

Cited By (9)

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WO2014099560A1 (fr) * 2012-12-21 2014-06-26 Corning Incorporated Procédé et appareil pour réduire la dévitrification sur des guides de bordure avec un chauffage par induction
US8794034B2 (en) 2012-05-29 2014-08-05 Corning Incorporated Apparatus for forming glass with edge directors and methods
US10047000B2 (en) 2014-01-15 2018-08-14 Corning Incorporated Method of making glass sheets with vehicle pretreatment of refractory
US10065880B2 (en) 2016-11-07 2018-09-04 Corning Incorporated Lithium containing glasses
US10435323B2 (en) 2014-01-15 2019-10-08 Corning Incorporated Method of making glass sheets with gas pretreatment of refractory
US10968134B2 (en) 2016-11-07 2021-04-06 Corning Incorporated Low viscosity glasses and methods and systems for manufacture
US11465926B2 (en) 2015-11-18 2022-10-11 Corning Incorporated Method and apparatuses for forming glass ribbons
US11702355B2 (en) 2017-11-22 2023-07-18 Corning Incorporated Apparatuses including edge directors for forming glass ribbons
US11738375B2 (en) 2017-02-28 2023-08-29 Corning Incorporated Apparatus and method for cleaning edge director

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JP5724552B2 (ja) * 2011-04-01 2015-05-27 日本電気硝子株式会社 薄板ガラス製造装置
JP7197503B2 (ja) * 2017-04-24 2022-12-27 コーニング インコーポレイテッド フュージョンドロー装置、及びガラスリボンの作製方法

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US20040055338A1 (en) * 2000-12-01 2004-03-25 Corning Incorporated Sag control of isopipes used in making sheet glass by the fusion process
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WO2006091730A1 (fr) * 2005-02-24 2006-08-31 Corning Incorporated Procede et dispositif pour fabriquer une feuille de verre
WO2007067409A2 (fr) * 2005-12-08 2007-06-14 Corning Incorporated Procede et appareil pour etirer du verre a faible viscosite liquidus

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US3537834A (en) * 1968-08-07 1970-11-03 Corning Glass Works Maintaining sheet glass width
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US20040055338A1 (en) * 2000-12-01 2004-03-25 Corning Incorporated Sag control of isopipes used in making sheet glass by the fusion process
US20050183455A1 (en) * 2004-02-23 2005-08-25 Pitbladdo Richard B. Sheet width control for overflow downdraw sheet glass forming apparatus
WO2006091730A1 (fr) * 2005-02-24 2006-08-31 Corning Incorporated Procede et dispositif pour fabriquer une feuille de verre
WO2007067409A2 (fr) * 2005-12-08 2007-06-14 Corning Incorporated Procede et appareil pour etirer du verre a faible viscosite liquidus

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8794034B2 (en) 2012-05-29 2014-08-05 Corning Incorporated Apparatus for forming glass with edge directors and methods
WO2014099560A1 (fr) * 2012-12-21 2014-06-26 Corning Incorporated Procédé et appareil pour réduire la dévitrification sur des guides de bordure avec un chauffage par induction
US10047000B2 (en) 2014-01-15 2018-08-14 Corning Incorporated Method of making glass sheets with vehicle pretreatment of refractory
US10435323B2 (en) 2014-01-15 2019-10-08 Corning Incorporated Method of making glass sheets with gas pretreatment of refractory
US11465926B2 (en) 2015-11-18 2022-10-11 Corning Incorporated Method and apparatuses for forming glass ribbons
US10065880B2 (en) 2016-11-07 2018-09-04 Corning Incorporated Lithium containing glasses
US10968134B2 (en) 2016-11-07 2021-04-06 Corning Incorporated Low viscosity glasses and methods and systems for manufacture
US11111173B2 (en) 2016-11-07 2021-09-07 Corning Incorporated Lithium containing glasses
US11932574B2 (en) 2016-11-07 2024-03-19 Corning Incorporated Lithium containing glasses
US11945747B2 (en) 2016-11-07 2024-04-02 Corning Incorporated Low viscosity glasses and methods and systems for manufacture
US11738375B2 (en) 2017-02-28 2023-08-29 Corning Incorporated Apparatus and method for cleaning edge director
US11702355B2 (en) 2017-11-22 2023-07-18 Corning Incorporated Apparatuses including edge directors for forming glass ribbons

Also Published As

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WO2010099278A3 (fr) 2010-12-29
KR101642534B1 (ko) 2016-07-25
CN102369166A (zh) 2012-03-07
TWI458688B (zh) 2014-11-01
JP2012519134A (ja) 2012-08-23
CN102369166B (zh) 2014-11-26
TW201038496A (en) 2010-11-01
KR20110130438A (ko) 2011-12-05
JP5551190B2 (ja) 2014-07-16

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