KR20190001607A

KR20190001607A - System and method for managing roll upsets

Info

Publication number: KR20190001607A
Application number: KR1020187037472A
Authority: KR
Inventors: 도모히로 아부라다; 재현 유
Original assignee: 코닝 인코포레이티드
Priority date: 2016-05-25
Filing date: 2017-05-23
Publication date: 2019-01-04
Also published as: TW201802043A; WO2017205364A1; JP2019516661A; CN109153592A

Abstract

Method and system for coping with upset incidents in the manufacture of glass articles. The method and system comprising monitoring the amount of glass on the outer periphery of at least one roll in contact with the glass ribbon and if the amount of glass on the outer periphery of the roll exceeds a predetermined amount, And remotely removing from the contact with the glass ribbon.

Description

System and method for managing roll upsets

This application claims the benefit of U.S. Provisional Application No. 62 / 341,248, filed May 25, 2016, The content of this document is hereby incorporated by reference in its entirety and claims the benefit of priority under § 119.

Field

[0002] This disclosure generally relates to systems and methods for free roll management, and more particularly to systems and methods for the management of free rolls in the event of an upset.

In the manufacture of glass articles such as glass sheets for display applications, including handheld devices such as phones and tablets and television, it is desirable to increase throughput in order to more efficiently utilize existing capital equipment . Also, there is a need to reduce response times in the manufacturing process, especially in the case of high throughput processes where delay in response time results in maintenance or replacement of capital equipment, in case of interruption or upset.

The aspects described herein are intended to solve some of the problems described above.

[0004] Embodiments disclosed herein include a method for responding to an upset accident in the manufacture of a glass article. The method includes monitoring the amount of glass on the outer perimeter of at least one roll in contact with the glass ribbon. The method also includes remotely removing the at least one roll from contact with the glass ribbon if the amount of glass on the outer periphery of the roll exceeds a predetermined amount.

[0005] The embodiments disclosed herein also include a system for responding to an upset incident in the manufacture of a glass article. The system includes a mechanism for monitoring the amount of glass on the outer perimeter of at least one roll in contact with the glass ribbon. The system also includes a mechanism for remotely removing the at least one roll from contact with the glass ribbon, if the amount of glass on the outer periphery of the roll exceeds a predetermined amount.

[0006] Additional features and advantages of the embodiments disclosed herein will be set forth in the detailed description which follows, and in part will be readily apparent to those skilled in the art from the detailed description, or may be learned by practice of the invention as set forth in the following detailed description and claims Lt; RTI ID = 0.0 > as < / RTI > described herein.

BRIEF DESCRIPTION OF THE DRAWINGS [0007] The foregoing general description and the following detailed description illustrate embodiments of the present disclosure, and are intended to provide an overview or outline for understanding the nature and characteristics of the embodiments as they are set forth and claimed. This should be understood. The accompanying drawings are included to provide a further understanding and are incorporated in and constitute a part of this specification. The drawings illustrate various embodiments of the present disclosure and serve to explain the principles and operation thereof in conjunction with the detailed description.

[0008] FIG. 1 is a schematic diagram of an exemplary fusion down-draw glass manufacturing process.
[0009] FIG. 2 is a front view illustrating a portion of a glass ribbon and a pair of pulling rolls and a pair of edge rolls in contact with the glass ribbon in accordance with the embodiments disclosed herein.
[0010] Figures 3a and 3b illustrate a portion of a glass ribbon according to the embodiments disclosed herein and a pair of pulling rolls being removed from contact with the glass ribbon in the thickness direction of the glass ribbon and a pair of edge rolls Respectively.
[0011] Figure 4 is a front view showing a portion of a glass ribbon according to the embodiments disclosed herein and a pair of pulling rolls and a pair of edge rolls being moved away from the glass ribbon in the width direction of the glass ribbon to be.
[0012] Figures 5A and 5B are front section views of a portion of the wall of the enclosure and the pulling roll and edge roll being removed from the enclosure in accordance with the embodiments disclosed herein.
[0013] FIG. 6 is a flow diagram illustrating the steps of a method in accordance with the embodiments disclosed herein.

[0014] Reference will now be made in detail to preferred embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. However, the present disclosure may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

[0015] Ranges can be expressed from "about" one particular value and / or to "about" another specific value. Where such a range is expressed, other embodiments include the one specific value and / or the other specific value. Similarly, it will be appreciated that, with the use of the preceding term "about ", if the values are represented by approximations, the particular value forms another embodiment. It will also be appreciated that the endpoints of each of the ranges are also meaningful independent of the other endpoints in relation to the other endpoints.

The terms (eg, up, down, right, left, front, back, top, bottom) as used herein are meant to refer only to the drawings as drawn, It is not intended to imply orientation.

[0017] Unless specifically stated otherwise, it is not intended that any method presented herein be construed as requiring that the steps be performed in any particular order, or that any particular orientation of any device will be required. Thus, when a method claim does not actually limit the order such that the steps follow, or when any device claim does not actually limit the order or direction of the individual components, or that the steps are defined in a particular order, Is intended to be implicit in any order or direction in any respect unless the context clearly dictates otherwise or where a particular order or direction of components of the apparatus is not limited. This includes the arrangement of steps, the workflow, the order of components, the logical aspects of the arrangement of components; General meanings that deviate from grammatical composition or punctuation; And any number of possible non-expressive bases for interpretation, including the number or type of embodiments described in the specification.

[0018] As used herein, the singular forms "a "," a ", and "the" include plural referents unless the context clearly dictates otherwise. Thus, unless the context clearly dictates otherwise, references to a "sun" component, for example, include aspects having two or more such components.

The terms "upset" or "upset event ", as used herein, are intended to mean that the glass manufacturing process is disturbed and that high quality glass articles, such as glass sheets, . Examples of upset include conditions that allow the formation of a high quality glass article to be at least temporarily transiently deviated from predetermined specifications and include conditions in which the enclosure containing the molten glass ribbon starts to fill the molten glass in an undesirable manner do.

[0020] The term "edge roll ", as used herein, refers to an edge roll, such as a molten glass sheet or ribbon having a viscosity in the range of, for example, about 10 ⁴ poise to about 10 ¹³ poise Refers to a roll or roller intended to contact a glass sheet or ribbon, including a molten glass sheet or ribbon. The edge roll can provide tension, for example, at least in the width direction of the glass sheet or ribbon. Typically, an edge roll can be expected to contain a refractory material and can be expected to be in an idle state in that it does not impart significant external torque or torque to the glass sheet or ribbon .

[0021] The term "pulling roll", as used herein, refers to a sheet of molten glass, such as a molten glass sheet or ribbon, having a viscosity in the range of, for example, about 10 ^7.6 poise to about 10 ^14.5 poise Refers to a roll or roller intended to contact a glass sheet or ribbon, including a molten glass sheet or ribbon. The pulling roll can provide tension, for example, at least in the width direction of the glass sheet or ribbon. The pulling roll may also provide a pulling force or tension in the longitudinal direction of the glass sheet or ribbon (i. E., In the drawing direction of the glass sheet or ribbon). Typically, a pulling roll may be expected to contain a refractory material and is driven (e. G., By a motor such as a servomotor) in that it exhibits significant external torque or torque when applied to the glass sheet or ribbon More can be expected. When at least two pulling rolls contact the molten glass sheet or ribbon, they can be driven to show the same or different external rotational forces or torques. For example, different pulling rolls may show the same or different torques or rotational speeds.

[0022] The term "roll", when used herein, may refer to at least one of an edge roll and a pulling roll.

[0023] Illustrated in FIG. 1 is an exemplary glass making apparatus 10. In some instances, the glass manufacturing apparatus 10 may include a glass fusing furnace 12 that includes a melting vessel 14. In addition to the melting vessel 14, the glass fusing furnace 12 may include one or more additional components, such as heating components (e.g., combustion burners or electrodes) that heat the raw materials and convert the raw materials to molten glass And may optionally include. In further examples, the glass fusing furnace 12 may include thermal management elements (e. G., Insulating components) that reduce the heat lost from adjacent portions of the melting vessel. In yet further examples, the glass fusing furnace 12 may include electronic components and / or electromechanical components that facilitate melting the raw materials into a glass melt. Moreover, the glass fusing furnace 12 may include support structures (e.g., support chassis, support members, etc.) or other components.

[0024] The glass melting vessel 14 is generally comprised of a flammable ceramic material, such as a flame-retardant ceramic material comprising alumina or zirconia. In some instances, the glass melt vessel 14 may be constructed from flame-retardant ceramic bricks. Specific embodiments of the glass melting vessel 14 will be described in more detail below.

[0025] In some instances, a glass fusing furnace may be incorporated as a component of a glass substrate, for example, a glass manufacturing apparatus for manufacturing continuous length glass ribbon. In some instances, the glass fusing furnace of the present disclosure may include a slot-draw device, a float bath device, a down-draw device such as a fusion process, an up-draw device, a press- As a component of a glass making apparatus comprising a press-rolling device, a tube drawing device, or any other glass-making device that will have advantages from the aspects disclosed herein. As an example method, Figure 1 schematically illustrates a glass fusing furnace 12 as a component of a fusion down-draw glass manufacturing apparatus 10 for fusion drawing glass ribbons for subsequent processing into individual glass sheets do.

The glass manufacturing apparatus 10 (eg, the Fusion down-draw apparatus 10) may optionally include an upstream glass manufacturing apparatus 16 located upstream of the glass melting vessel 14 . In some instances, some or all of the upstream glass manufacturing apparatus 16 may be incorporated as part of the glass fusing furnace 12.

[0027] As shown in the illustrated example, the upstream glass manufacturing apparatus 16 may include a reservoir 18, a raw material transfer apparatus 20, and a motor 22 connected to the raw material transfer apparatus. The reservoir 18 may store a large amount of raw materials 24 that may be introduced into the melting vessel 14 of the glass fusing furnace 12 as indicated by the arrow 26. The raw materials 24 generally comprise one or more glass-forming metal oxides and one or more modifying agents. The raw material transfer device 20 is driven by the motor 22 so that the raw material transfer device 20 transfers a predetermined amount of the raw materials 24 from the reservoir 18 to the molten vessel 14. [ . In further examples, the motor 22 may be driven to introduce the raw materials 24 at a controlled rate, based on the level of molten glass sensed downstream from the melting vessel 14, . The raw materials 24 in the melting vessel 14 can then be heated to form the molten glass 28.

[0028] The glass manufacturing apparatus 10 may also optionally include a downstream glass manufacturing apparatus 30 located downstream of the glass fusing furnace 12. In some instances, a portion of the downstream glass manufacturing apparatus 30 may be incorporated as part of the glass fusing furnace 12. In some instances, the first connecting conduit 32, discussed below, or other portions of the downstream glass manufacturing apparatus 30 may be incorporated as part of the glass fusing furnace 12. The components of the downstream glass manufacturing apparatus including the first connecting conduit 32 may be formed of precious metal. Suitable noble metals include platinum group metals selected from the group of metals consisting of platinum, iridium, rhodium, osmium, ruthenium, and palladium or alloys thereof. For example, the downstream components of the glass manufacturing apparatus may be formed of a platinum-rhodium alloy comprising about 70 wt% to about 90 wt% platinum and about 10 wt% to about 30 wt% rhodium. However, other suitable metals may include molybdenum, palladium, rhenium, tantalum, titanium, tungsten, and alloys thereof.

The downstream glass manufacturing apparatus 30 includes a first conditioning unit 30 such as a fining vessel located downstream from the melting vessel 14 and coupled to the molten vessel 14 by a first connecting conduit 32 referred to above, (I. E., Treated) vessels. In some instances, molten glass 38 may be gravity injected from molten vessel 14 to clarifying vessel 34 by first connecting conduit 32. For example, gravity may cause the molten glass 28 to pass from the molten vessel 14 to the clarifying vessel 34 through the internal path of the first connecting conduit 32. It should be understood, however, that other conditioning vessels may be located downstream of the melting vessel 14, for example, between the melting vessel 14 and the clarifying vessel 34. In some embodiments, a conditioning vessel may be employed between a molten vessel and a clarifying vessel, wherein the molten glass from the primary molten vessel is further heated to continue the melting process, or is melted in the molten vessel prior to entering the clarification vessel It is cooled to a temperature lower than the temperature of the glass.

[0030] The bubbles may be removed from the molten glass 28 in the clarifying vessel 34 by a variety of techniques. For example, the raw materials 24 may comprise multivalent compounds such as tin oxides (i. E., Fining agents), which undergo a chemical reduction reaction when heated, Release. Other suitable fining agents include, without limitation, arsenic, antimony, iron, and cerium. The clarifying vessel 34 is heated to a temperature higher than the melting vessel temperature to heat the molten glass and the fining agent. The oxygen bubbles produced by the temperature-induced chemical reduction of the refining agent (s) rise through the molten glass in the refining vessel and the gases in the molten glass produced in the melting furnace are produced by the refining agent May be diffused or coalesced into oxygen bubbles. The enlarged gas bubbles can then rise to the free surface of the molten glass in the purifying vessel and then vent to the outside of the purifying vessel. The oxygen bubbles can further induce mechanical mixing of the molten glass in the clarifying vessel.

[0031] The downstream glass manufacturing apparatus 30 may further include another conditioning vessel, such as a mixing vessel 36 for mixing molten glass. The mixing vessel 36 may be located downstream from the clarifying vessel 34. Mixed vessel 36 can be used to provide a homogeneous glass melt composition, thereby reducing the cords of chemical or thermal heterogeneity that might otherwise be present in the clarified molten glass exiting the clarifying vessel. As shown, the clarifying vessel 34 may be coupled to the mixing vessel 36 by a second connecting conduit 38. In some instances, the molten glass 28 may be gravity injected from the clarifying vessel 34 to the mixing vessel 36 by the second connecting conduit 38. For example, gravity may cause the molten glass 28 to pass from the clarifying vessel 34 to the mixing vessel 36 via the internal passage of the second connecting conduit 38. It should be noted that while the mixed vessel 36 is shown downstream of the clarifying vessel 34, the mixed vessel 36 may be located upstream from the clarifying vessel 34. In some embodiments, the downstream glass manufacturing apparatus 30 may include a plurality of mixing vessels, for example a mixing vessel upstream from the clarifying vessel 34 and a mixing vessel downstream from the clarifying vessel 34. These multiple mixed vessels may be of the same design, or may be of different design.

[0032] The downstream glass manufacturing device 30 may further include another conditioning vessel, such as a transport vessel 40, which may be located downstream from the mixing vessel 36. The transfer vessel 40 can condition the molten glass 28 to be injected into the downstream forming apparatus. For example, the transfer vessel 40 may be connected to an accumulator and / or a flow regulator for regulating and / or providing a consistent flow of molten glass 28 to the forming body 42 by an outlet conduit 44. [ Lt; / RTI > As shown, the mixing vessel 36 may be coupled to the transport vessel 40 by a third connection conduit 46. In some instances, the molten glass 28 may be gravity injected from the mixing vessel 36 to the transfer vessel 40 by a third connecting conduit 46. For example, gravity may drive the molten glass 28 through the internal path of the third connecting conduit 46 from the mixing vessel 36 to the conveying vessel 40.

The downstream glass manufacturing apparatus 30 may further include a forming apparatus 48 including the above-described forming body 42 and inlet conduit 50. The outlet conduit 44 may be positioned to transfer the molten glass 28 from the transfer vessel 40 to the inlet conduit 50 of the forming device 48. For example, in the examples, the outlet conduit 44 may be spaced therefrom within the inner surface of the inlet conduit 50, thereby allowing the outer surface of the outlet conduit 44 and the outer surface of the inlet conduit 50 To provide a free surface of the molten glass located between the inner surfaces. The forming body 42 in the fusion down-draft glass manufacturing apparatus includes a water tub 52 positioned within the upper surface of the forming body and converging forming surfaces (not shown) converging in the draw direction along the bottom edge 56 of the forming body converging forming surfaces (54). The molten glass, the outlet conduit 44 and the inlet conduit 50 conveyed to the forming body water tank through the transfer vessel 40 floods the sidewalls of the water tank and flows along the converging forming surfaces 54 as separate flows of molten glass It comes down. By applying tension to the glass ribbon, such as by gravity, edge rolls 72 and pulling rolls 82 to adjust the dimensions of the glass ribbon as the glass is cooled and the viscosity of the glass increases, The separated streams of molten glass join together along the bottom edge 56 below to create a single glass ribbon 58 drawn in the draw direction 60 from the bottom. Thus, the glass ribbon 58 undergoes a visco-elastic transition and obtains mechanical properties that impart stable dimensional properties to the glass ribbon 58. In some embodiments, the glass ribbon 58 may be separated into individual glass sheets 62 by the glass separation apparatus 100 within the elastic region of the glass ribbon. The robot 64 can then use the ripping tool 65 to transfer individual glass sheets 62 to a conveyor system where individual glass sheets can be further processed.

[0034] Figure 2 shows a portion of the glass ribbon 58 and a pair of pulling rolls 82 and a pair of edge rolls 72 in contact with the glass ribbon 58 according to the embodiments disclosed herein It is a front view. Figure 2 shows a pair of pulling rolls 82 and a pair of edge rolls 72 on each side of the ribbon, however, the embodiments disclosed herein may be used with any number of edge rolls and / It is to be understood that the invention is not limited thereto. (For example, there may be edge rolls on the pulling rolls as shown in FIG. 2, such that the edge rolls along the length of the ribbon in the drawing direction are alternating with the pulling rolls, or there may be edge rolls below the pulling rolls Etc.)

In particular, in the embodiment illustrated in FIG. 2, the edge rolls 72 are the individual parts of the edge roll assembly 70, and the edge roll assembly 70 includes a support shaft 72 attached to the edge roll 72, (74), and the edge roll (72) may be mounted on the support shaft (74) and coaxial thereto. For example, the support shaft 74 may be made of metal or other materials that resist the temperature at which the glass ribbon 58 can be drawn. In the next turn, the support shaft 74 may be connected to a motor 75, such as a servo motor. The motor 75 is mounted on a slidable mounting block 76 which can be moved by the motion of the motor 75, for example, Can be moved laterally along the slide 77 in order to be movable relative to the glass ribbon 58. The edge roll assembly 70 also includes an adjustment mechanism 78 to enable precise and well-coordinated movement of the edge roll 72, e.g., in an incremental manner, e.g., based on intermeshed gears, . &Lt; / RTI >

2, the pulling rolls 82 are respective parts of the pulling roll assembly 80 and the pulling roll assembly 80 includes a support shaft 84 attached to the pulling roll 82 , And the pulling roll 82 may be mounted on the support shaft 84 and coaxial thereto. For example, the support shaft 84 may be made of metal or other materials that resist the temperature at which the glass ribbon 58 can be drawn. In the next turn, the support shaft 84 may be connected to a motor 85, such as a servo motor. The motor 85 is mounted on a slideable mounting block 86 which is movable in the direction of the axis of rotation of the motor 85 Along the slide 87 in order to allow the pulling roll 82 to move relative to the glass ribbon 58 through the action of the motor (which may or may not be the same motor as the providing motor) . The pulling roll assembly 80 may also include an adjustment mechanism 88 to enable precise and well coordinated movement of the pulling roll 82, e.g., in an incremental manner, e.g., based on intermeshed gears, . &Lt; / RTI >

[0037] Figures 3a and 3b illustrate a pair of glass ribbon 58 in the process of being removed from contact with the glass ribbon 58 in the thickness direction of the glass ribbon and a portion of the glass ribbon 58 according to the embodiments disclosed herein. Pulling rolls 82 and a pair of edge rolls 72. As shown in FIG. In the embodiment of Figure 3a edge rolls 72 and pulling rolls 82 are in contact with the glass ribbon 58 on opposite sides of the glass ribbon 58. The edge rolls 72 and pulling rolls 82 in the embodiment of Figure 3b are shown as indicated by arrows 90 relative to the edge rolls 72 and as indicated by arrows 95 relative to the pulling rolls 82 And removed from contact with the glass ribbon 58 by moving the rolls away from the glass ribbon 58 in a direction opposite to the thickness direction of the glass ribbon 58. [

4 shows a portion of a glass ribbon 58 according to the embodiments disclosed herein and a pair of pulling rolls 82 in the process of being moved away from the glass ribbon in the width direction of the glass ribbon 58 And a pair of edge rolls 72. As shown in Fig. 4, the edge roll 72 moves in the direction of the arrow 92 as a result of lateral movement along the slide 77 of the slidable mounting block 76. As shown in Fig. Similarly, pulling roll 82 moves in the direction of arrow 97 as a result of lateral movement along slide 87 of slideable mounting block 86.

In this manner, by first moving away from the glass ribbon 58 in a direction opposite to the thickness direction of the glass ribbon 58 (for example, as shown in FIGS. 3A and 3B) , And then moving the rolls away from the ribbon in the width direction of the glass ribbon 58 (as shown, for example, in Fig. 4), the embodiments shown in Figs. 3a and 3b Can be used in conjunction with the embodiment shown in Figure 4 to separate the edge rolls 72 and / or the pulling rolls 82 from contact with the glass ribbon 58.

[0040] Figures 5a and 5b illustrate a portion of a wall 100 of an enclosure that houses a glass ribbon (not shown in Figures 5a and 5b), and a portion of the wall 100 that is removed from the enclosure Are front cross-sectional views of the pulling roll 82 and the edge roll 72 in the process. 5A and 5B, to facilitate movement of the pulling rolls 82 and / or the edge rolls 72 from the enclosure, the seal plates < RTI ID = 0.0 > (102, 104) may be moved or removed first. The edge rolls 72 can then move in the direction of the arrow 94 as a result of the lateral movement of the slidable mounting block 76 along the slide 77. Similarly, pulling rolls 82 can move in the direction of arrow 99 as a result of lateral movement of slidable mounting block 86 along slide 87.

[0041] FIG. 6 is a flow diagram illustrating the steps of a method in accordance with the embodiments disclosed herein. In particular, the flow chart of Figure 6 illustrates exemplary steps for responding to an upset event in accordance with the embodiments disclosed herein. In the flow chart of Figure 6, the hexagon 200 represents a stable process in the manufacture of a glass article, such as a glass sheet. Box 202 represents an upset or upset incident as defined herein. The upset may be detected, for example, by an operator, and / or by a process control system configured to detect an upset incident. The box 204 may include at least one edge roll and / or at least one pulling roll, such as the pulling rolls 82 and edge rolls 72 shown in Figure 2, Thereby increasing the same gas flow. Such an increase in gas flow may be achieved, for example, by flowing more air through the enclosure and / or through nozzles or orifices directed toward the at least one edge roll and / And flowing air. Such an increase in gas flow may occur while the at least one roll is still in contact with the glass ribbon and may also continue to occur after the at least one roll is removed from contact with the glass ribbon. A portion of the gas, such as air, may already flow in the enclosure housing the glass ribbon, but increasing the flow rate of the gas may cause glass to be wrapped around a roll, such as an edge roll or pulling roll Preventing or minimizing the effects of the disease. Increasing the flow of gas may be accomplished remotely by a process control system or operator that activates, by remote control, an automated mechanism that increases the flow of gas around the at least one roll to a predetermined level or higher, for example. &Lt; / RTI >

[0042] In some embodiments, the viscosity of the glass ribbon at the point of contact with the roll is in the range of about 10 ⁴ poise to about 10 ^14.5 poise, for example about 10 ^7.6 The amount of adhesion between the glass and the roll, as in the case of a range of from about a pearl to about 10 ¹³ poise, can be determined by measuring the degree of glass wrapping around the roll, in the sense that at least some of it can be a function of the viscosity of the glass degree may be a function of the viscosity of the glass ribbon at the nearest point to the roll.

[0043] With continued reference to FIG. 6, the diamond 206 represents the first decision point associated with the glass being wrapped around at least one edge roll and / or at least one roll, such as at least one pulling roll. Specifically, if the amount of glass on the outer periphery of the roll exceeds a predetermined amount, such as when the glass on the outer periphery has a radial thickness exceeding the thickness of the glass ribbon, May be removed from contact with the glass ribbon as shown in Figures 2-4 and box 208 with respect to edge rolls 72 and pulling rolls 82, for example. The determination of whether the amount of glass on the outer surface of at least one roll exceeds a predetermined amount may be accomplished, for example, by a camera or other monitoring device that may be monitored by an operator and / or included as a component of the process control system For example, by monitoring the amount of glass on the outer circumference of at least one roll. The removal of the at least one roll may be accomplished, for example, by a process control system or an operator that remotely activates an automated mechanism to remove the at least one roll from contact with the glass ribbon, &Lt; / RTI >

If the amount of glass on the outer periphery of the roll does not exceed a predetermined amount, the rapid removal of at least one roll is not selected as part of the remaining steps of the upset recovery procedure as indicated by box 218 I will not. In this case, the at least one roll may still be removed at some point, but if the amount of the glass on the outer periphery of the roll does not exceed a predetermined amount, then the roll removal will have a lower relative priority in the upset recovery procedure And may be performed remotely or passively, for example, through the use of an automated system. Once the upset recovery procedure is fully performed, a stable process for manufacturing a glass article, as shown by hexagon 220, can be resumed.

[0045] The diamond 210 represents a second decision point regarding the removal of the at least one edge roll from the enclosure containing the glass ribbon and the at least one edge roll. Specifically, with respect to edge rolls 72 and pulling rolls 82, if the upset conditions in the enclosure exceed a predetermined threshold, such as when unrecoverable damage is expected to be imminent on at least one roll, The at least one roll can be removed from the enclosure as shown in Figures 5a and 5b and as shown in box 212. [ Removal of the at least one roll may be accomplished remotely, such as by a process control system or operator that activates an automated mechanism remotely to, for example, remove the at least one roll from the enclosure. have. This removal may also be accomplished by a process control system or operator using an automated mechanism to remove sealing components such as the seal plates 102, 104 of Figure 5A to facilitate removal of the at least one roll from the enclosure. And a step of activating.

[0046] If the upset conditions in the enclosure housing the glass ribbon do not exceed a predetermined threshold, the rapid removal of at least one roll from the enclosure may not be selected as part of the remaining steps of the upset recovery procedure . In this case, the at least one roll may still be removed from the enclosure at some point, but if the upset conditions in the enclosure containing the glass ribbon do not exceed a predetermined amount, May have a lower relative priority in the procedure, and may be performed remotely or passively, for example, through the use of an automated system.

[0047] After the at least one roll is removed from the enclosure, by placing a replacement roll on the support shaft, as indicated by box 214, for example when the roll assembly is outside the enclosure, It can be replaced by one replacement roll. If the at least one replacement roll is positioned on the support shaft, the roll assembly may be relocated within the enclosure, as indicated by box 216. [

While the above embodiments have been described with reference to a Fusion Down-Draw process, such embodiments may include, for example, float processes, slot-draw processes, up- draw processes, and other glass forming processes such as press-rolling processes.

[0049] It will be apparent to those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the principles set forth herein. It is, therefore, intended to cover the modifications and variations of the embodiments that fall within the scope of the appended claims and their equivalents.

Claims

CLAIMS 1. A method for responding to an upset accident in the manufacture of a glass article,
Monitoring the amount of glass on the outer perimeter of at least one roll in contact with the glass ribbon; And
Remotely removing the at least one roll from contact with the glass ribbon if the amount of glass on the outer periphery of the roll exceeds a predetermined amount;
/ RTI >

The method according to claim 1,
Further comprising increasing the gas flow around the at least one roll.

The method according to claim 1,
The glass ribbon and at least one roll being contained within the enclosure,
Further comprising the step of removing said at least one roll from said enclosure by remote control.

The method according to claim 1,
Wherein the viscosity of the glass ribbon is in the range of about 10 ⁴ to about 10 ^14.5 poise at the roll contact point.

5. The method of claim 4,
Wherein the viscosity of the glass ribbon is in the range of about 10 ^7.6 to about 10 ¹³ pounds at the roll contact point.

The method according to claim 1,
Wherein said at least one roll comprises an edge roll.

The method according to claim 1,
Characterized in that said at least one roll comprises a pulling roll.

The method according to claim 1,
Wherein the monitoring step comprises the use of a camera.

3. The method of claim 2,
Characterized in that the gas comprises air.

A system for responding to an upset incident in the manufacture of a glass article,
An apparatus for monitoring the amount of glass on the outer periphery of at least one roll in contact with the glass ribbon; And
If the amount of glass on the outer periphery of the roll exceeds a predetermined amount, remotely removing the at least one roll from contact with the glass ribbon;
Lt; / RTI >

11. The method of claim 10,
Further comprising a configuration for increasing the gas flow around the at least one roll.

11. The method of claim 10,
The glass ribbon and at least one roll being contained within the enclosure,
Wherein the system further comprises a configuration to remotely remove the at least one roll from the enclosure.

11. The method of claim 10,
Wherein the viscosity of the glass ribbon is in the range of from about 10 ⁴ to about 10 ^14.5 poise at the roll contact point.

14. The method of claim 13,
Wherein the viscosity of the glass ribbon is in the range of about 10 ^7.6 to about 10 ¹³ poise at the roll contact point.

11. The method of claim 10,
Said at least one roll comprising an edge roll.

11. The method of claim 10,
Wherein said at least one roll comprises a pulling roll.

11. The method of claim 10,
Characterized in that the device for monitoring the amount of glass on the outer periphery of at least one roll in contact with the glass ribbon comprises a camera.

12. The method of claim 11,
Characterized in that the gas comprises air.