JP2019516661A - System and method for upset management of roles - Google Patents

Abstract

Methods and systems for responding to upset events in the production of glass articles. The method and system include monitoring the amount of glass on the periphery of at least one roll in contact with the glass ribbon, and further, if the amount of glass on the periphery of the roll exceeds a predetermined amount, Remotely releasing the at least one roll from contact.

Description

Cross-reference to related applications

  This application is a 35th edition of US Provisional Patent Application No. 62 / 341,248, filed May 25, 2016, the contents of which are incorporated herein by reference in its entirety. Claim the benefit of priority under Article 119 of the Patent Act.

  The present disclosure relates generally to systems and methods for glass roll management, and more particularly to systems and methods for glass roll management in an upset event.

  To improve throughput to more effectively utilize existing capital equipment in the production of glass articles such as glass sheets for display applications including televisions and portable devices such as phones and tablets It is desired. In production processes, particularly in high throughput processes where delayed response times can lead to repair or replacement of capital equipment, it is also desirable to reduce the response times when interruptions or upsets occur.

  Embodiments disclosed herein include methods for responding to upset events in the production of glass articles. The method includes the step of monitoring the amount of glass on the periphery of at least one roll in contact with the glass ribbon. The method also includes the step of remotely releasing the at least one roll from contact with the glass ribbon if the amount of glass on the periphery of the roll exceeds a predetermined amount.

  Embodiments disclosed herein also include a system for responding to upset events in the production of glass articles. The system includes a mechanism for monitoring the amount of glass on the periphery of at least one roll in contact with the glass ribbon. The system also includes a mechanism for remotely releasing the at least one roll from contact with the glass ribbon if the amount of glass at the periphery of the roll exceeds a predetermined amount.

  Additional features and advantages of the embodiments disclosed herein are set forth in the following detailed description, and in part will be readily apparent to those skilled in the art from the description, or It will be appreciated by practice of the embodiments of the present disclosure as described herein, including the detailed description, claims, and accompanying drawings.

  Both the foregoing summary and the following detailed description present an embodiment intended to provide an overview or framework for understanding the nature and features of the embodiments described in the claims. It should be understood that The accompanying drawings are included to provide a further understanding and are incorporated into and constitute a part of this specification. The drawings illustrate various embodiments of the present disclosure and, together with the description, serve to explain the principles and operations thereof.

Schematic of an example fusion downdraw glass manufacturing process A front view of a portion of a glass ribbon and a pair of edge rolls and a pair of pull rolls in contact with the glass ribbon according to embodiments disclosed herein Side cross-sectional view of a portion of a glass ribbon, as well as a pair of edge rolls and a pair of pull rolls that are released from contact with the glass ribbon in the thickness direction of the ribbon, according to embodiments disclosed herein. Same as Figure 3A A portion of a glass ribbon and a front view of a pair of edge rolls and a pair of pull rolls away from the ribbon in the width direction of the ribbon in accordance with the embodiments disclosed herein Front cross-sectional view of a portion of the housing wall, as well as edge and pull rolls released from the housing, in accordance with the embodiments disclosed herein Same as Figure 5A Flowchart showing method steps in accordance with the embodiments disclosed herein

  Reference will now be made in detail to the 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 can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

  Ranges may be expressed herein as from "about" one particular value, and / or to "about" another particular value. When such a range is expressed, another embodiment includes from the one particular value and / or to the other particular value. Similarly, when values are expressed as approximations, using, for example, the antecedent "about," it will be understood that the particular value forms another embodiment. It will be further understood that the endpoints of each of the ranges are significant both in relation to the other endpoint, and independently of the other endpoint.

  As used herein, directional terms (eg, upper, lower, right, left, front, rear, upper, lower) are mentioned only with respect to the figures as drawn and imply absolute orientation Not intended.

  Unless otherwise stated, the methods described herein are not intended to require that the steps be performed in a particular order, or to be construed as requiring a particular orientation of the device. Absent. Thus, if the method claims do not actually list the order in which the steps should be followed, or if the device claims do not actually list the order or orientation for the individual components, or In the claims or in the specification as not specifically stated in the claims that the steps should be limited to a particular order, or in the case where a particular order or orientation for the components of the device is not listed Also in terms of points, it is never intended that the order or orientation be inferred. This means that the logical arrangement of the process arrangement, the operation flow, the order of the components, or the orientation of the components; the apparent meaning derived from the grammar configuration or the punctuation; and the number of the embodiments described herein. Or for any non-obvious grounds for interpretation, including types.

  As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" includes the aspect of having more than one such component, unless the context clearly indicates otherwise.

  As used herein, the terms "upset" or "upset event" refer to any condition in which the glass manufacturing process is interrupted and thus high quality glass articles such as glass sheets can not be at least temporarily manufactured. . An example of an upset is that the formation of high quality glass articles at least temporarily from predetermined specifications, including the condition that the housing containing the molten glass ribbon begins to fill with molten glass in an undesirable manner. There is a state of coming off.

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

As used herein, the term "pull roll" includes, for example, a molten glass sheet or ribbon, such as a molten glass sheet or ribbon having a viscosity in the range of about 10 ^7.6 poise to about 10 ^14.5 poise. Refers to a roll or roller intended to be in contact with a glass sheet or ribbon. The pull roll can, for example, provide tension in at least the width direction of the glass sheet or ribbon. The pull roll can also provide a pulling force or tension, for example, also in the longitudinal direction of the glass sheet or ribbon (ie, the stretching direction of the glass sheet or ribbon). Typically, the pull roll can be expected to comprise a refractory material and is further driven in that it exhibits a significant external rotational force or torque when applied to a glass sheet or ribbon (eg, It can be expected) by motors such as servomotors. When at least two pull rolls contact the molten glass sheet or ribbon, they can be driven to exhibit the same or different external rotational forces or torques. For example, different pull rolls can exhibit the same or different torques or rotational speeds.

  As used herein, the term "roll" may refer to at least one of an edge roll and a pull roll.

  An exemplary glass manufacturing apparatus 10 is shown in FIG. In some examples, glass manufacturing apparatus 10 may include a glass melting furnace 12, which may include a melting vessel 14. In addition to the melting vessel 14, the glass melting furnace 12 optionally heats the raw material and converts one or more additional elements such as a heating element (eg, a combustion burner or electrode) to convert the raw material to molten glass. It may include components. In a further example, the glass melting furnace 12 can include a thermal management device (eg, an insulating component) that reduces heat loss from the vicinity of the melting vessel. In a further example, the glass melting furnace 12 can include electronic and / or electromechanical devices that facilitate melting of the raw materials into a glass melt. Furthermore, the glass melting furnace 12 may include a support structure (e.g., a support chassis, support members, etc.) or other components.

  Glass melting vessel 14 is typically comprised of a refractory material, such as, for example, a refractory ceramic material such as a refractory ceramic material including alumina or zirconia. In some instances, the glass melting vessel 14 can be comprised of refractory ceramic bricks. Specific embodiments of the glass melting vessel 14 are described in further detail below.

  In some instances, a glass melting furnace can be incorporated as a component of a glass manufacturing apparatus for making a glass substrate, such as a continuous length glass ribbon, for example. In some instances, the glass melting furnace of the present disclosure is disclosed in a slot draw apparatus, a float bath apparatus, a down draw apparatus such as a fusion process, an up draw apparatus, a press rolling apparatus, a tube drawing apparatus, or herein. It can be incorporated as a component of a glass making apparatus, including any other glass making apparatus that would benefit from the embodiments. By way of example, FIG. 1 schematically shows a glass melting furnace 12 as a component of a fusion downdraw glass making apparatus 10 for fusion drawing glass ribbons for subsequent processing into individual glass sheets .

  The glass making apparatus 10 (eg, the fusion downdraw apparatus 10) may optionally include an upstream glass making apparatus 16 positioned upstream to the glass melting vessel 14. In some instances, a portion or all of upstream glass manufacturing apparatus 16 may be incorporated as part of glass melting furnace 12.

  As shown in the illustrated example, the upstream glass manufacturing apparatus 16 may include a storage bin 18, a raw material delivery device 20, and a motor 22 connected to the raw material delivery device. The storage bin 18 can store a large amount of raw material 24 that can be fed into the melting vessel 14 of the glass melting furnace 12 as indicated by the arrow 26. Raw material 24 typically includes one or more glass glass forming metal oxides, and one or more modifiers. In some instances, the raw material delivery device 20 can be powered by the motor 22 such that the raw material delivery device 20 delivers a predetermined amount of raw material 24 from the storage bin 18 to the melting container 14. In a further example, motor 22 can power raw material delivery device 20 to introduce raw material 24 at a controlled rate based on the level of molten glass detected downstream of melting vessel 14. The raw materials 24 in the melting vessel 14 can then be heated to form the molten glass 28.

  Glass making apparatus 10 may also optionally include a downstream glass making apparatus 30 positioned downstream to glass melting furnace 12. In some instances, a portion of the downstream glass manufacturing apparatus 30 may be incorporated as part of the glass melting furnace 12. In some cases, the first connection conduit 32 or other portion of the downstream glass manufacturing apparatus 30 discussed below may be incorporated as part of the glass melting furnace 12. The elements of the downstream glass making apparatus, including the first connecting conduit 32, can be formed of precious metals. Suitable noble metals are 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 making apparatus can be formed of a platinum-rhodium alloy comprising about 70 to about 90 wt% platinum and about 10% to about 30 wt% rhodium. However, other suitable metals can include molybdenum, palladium, rhenium, tantalum, titanium, tungsten, and their alloys.

  The downstream glass manufacturing apparatus 30 is located downstream of the melting vessel 14 and is connected to the melting vessel 14 by the first connection conduit 32, such as a first conditioning (i.e. processing) vessel, such as a fining vessel 34. May be included. In some instances, the molten glass 28 can be gravity fed from the melting vessel 14 to the fining vessel 34 by the first connection conduit 32. For example, gravity allows the molten glass 28 to pass through the internal path of the first connecting conduit 32 from the melting vessel 14 to the fining vessel 34. However, it should be understood that other control vessels may be positioned downstream of the melting vessel 14, such as, for example, between the melting vessel 14 and the fining vessel 34. In some embodiments, a control vessel can be used between the melting vessel and the fining vessel, wherein the molten glass coming from the primary melting vessel is further subjected to the melting process to continue before entering the fining vessel. It is heated or cooled to a temperature lower than the temperature of the molten glass in the melting vessel.

  Air bubbles may be removed from the molten glass 28 in the fining vessel 34 by various techniques. For example, raw material 24 may comprise a polyvalent compound such as tin oxide (i.e., a fining agent) that undergoes a chemical reduction reaction and releases oxygen when heated. Other suitable fining agents include, but are not limited to, arsenic, antimony, iron and cerium. The fining vessel 34 is heated to a temperature above the melting vessel temperature, thereby heating the molten glass and the fining agent. Oxygen bubbles produced by temperature-induced chemical reduction of the fining agent rise through the molten glass in the fining vessel, where the gas in the molten glass produced by the melting furnace is the oxygen produced by the fining agent Diffuse or coalesce into bubbles. The expanded bubbles can then rise to the free surface of the molten glass in the fining vessel and then be released out of the fining vessel. Oxygen bubbles may also induce mechanical mixing of the molten glass in the fining vessel.

  The downstream glass manufacturing apparatus 30 may further include another control vessel, such as a mixing vessel 36 for mixing the molten glass. A mixing vessel 36 may be located downstream of the clarification vessel 34. The mixing vessel 36 can be used to provide a homogeneous glass melt composition, whereby chemical or thermal would otherwise be present in the clarified molten glass leaving the fining vessel. Uneven streaks can be reduced. As shown, the fining vessel 34 may be connected to the mixing vessel 36 by a second connection conduit 38. In some instances, the molten glass 28 can be gravity fed from the fining vessel 34 to the mixing vessel 36 by the second connection conduit 38. For example, gravity allows the molten glass 28 to pass through the internal path of the second connecting conduit 38 from the fining vessel 34 to the mixing vessel 36. It should be noted that although the mixing vessel 36 is shown downstream of the clarification vessel 34, the mixing vessel 36 may be positioned upstream of the clarification vessel 34. In some embodiments, the downstream glass manufacturing apparatus 30 may include multiple mixing vessels, such as, for example, a mixing vessel upstream of the fining vessel 34 and a mixing vessel downstream of the fining vessel 34. The plurality of mixing vessels may be of the same design, or they may be of different designs.

  The downstream glass manufacturing apparatus 30 may further include another adjustment container, such as a delivery container 40 that may be located downstream of the mixing container 36. The delivery container 40 can be adjusted to supply the molten glass 28 downstream into the forming device. For example, delivery container 40 may act as an accumulator and / or a flow control device to regulate and / or provide a consistent flow of molten glass 28 to molded body 42 by outlet conduit 44. As shown, the mixing container 36 may be connected to the delivery container 40 by a third connection conduit 46. In some instances, the molten glass 28 can be gravity fed from the mixing vessel 36 to the delivery vessel 40 by the third connection 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 delivery vessel 40.

  The downstream glass manufacturing apparatus 30 can further include a forming apparatus 48 including the forming body 42 and the inlet conduit 50. The outlet conduit 44 may be positioned to deliver the molten glass 28 from the delivery container 40 to the inlet conduit 50 of the forming device 48. For example, in the example, the outlet conduit 44 may be nested in the inner surface of the inlet conduit 50 and spaced apart from the inner surface, thereby positioned between the outer surface of the outlet conduit 44 and the inner surface of the inlet conduit 50 , Provide the free surface of the molten glass. The forming body 42 in the fusion downdraw glass making apparatus may include a trough 52 positioned on the upper surface of the forming body and a converging forming surface 54 that converges in the stretch direction along the lower end 56 of the forming body. Molten glass delivered to the trough of the forming body via the delivery container 40, the outlet conduit 44 and the inlet conduit 50 overflows the sidewall of the trough and along the converging forming surface 54 as a separate flow of molten glass Go down. Separated streams of molten glass are joined along the lower end below the lower end 56 to produce a single ribbon of glass 58, which is a glass ribbon, such as by gravity, edge roll 72, pull roll 82, etc. The tension is applied from the lower end 56 in the stretching direction 60 to control the dimensions of the glass ribbon as it cools and the viscosity of the glass increases. Thus, the glass ribbon 58 undergoes a visco-elastic transition and acquires mechanical properties that give the glass ribbon 58 stable dimensional characteristics. In some embodiments, glass ribbons 58 may be separated into individual glass sheets 62 by the glass separation device 100 in the elastic region of the glass ribbons. Thereafter, the individual glass sheets 62 may be transported by the robot 64 to the conveyor system using the grippers 65, where the individual glass sheets may be further processed.

  FIG. 2 shows a front view of a portion of the glass ribbon 58, as well as a pair of edge rolls 72 and a pair of pull rolls 82 in contact with the glass ribbon 58, in accordance with the embodiments disclosed herein. Although FIG. 2 shows a pair of edge rolls 72 and a pair of pull rolls 82 on each side of the ribbon, the embodiments disclosed herein may have any number of edge rolls and / or pull rolls in any configuration. (For example, as shown in FIG. 2, an edge roll above the pull roll, or an edge roll below the pull roll, such as alternating edge rolls and pull rolls along the length of the ribbon in the stretching direction, etc. It should be understood that or may be applied to them.

  In particular, in the embodiment illustrated in FIG. 2, the edge roll 72 includes a support shaft 74 attached to the edge roll 72 such that the edge roll 72 can be coaxially mounted on the support shaft 74, 4A is a portion of an edge roll assembly 70. FIG. The support shaft 74 may, for example, be made of metal or other material that withstands the temperatures at which the glass ribbon 58 can be drawn. The support shaft 74, in turn, is a slidable mounting which is laterally movable along the slide 77 to allow the edge roll 72 to move relative to the glass ribbon 58, for example via the operation of the motor 75. It may be connected to a motor 75 such as a servomotor mounted on block 76. The edge roll assembly 70 may also include an adjustment mechanism 78 to allow accurate and measured movement of the edge roll 72, eg, incrementally, based on interface gears, grooves, and the like.

  In the embodiment illustrated in FIG. 2, each of the pull roll assemblies 80 includes a support shaft 84 attached to the pull roll 82 such that the pull roll 82 can be coaxially mounted on the support shaft 84. It is a part. The support shaft 84 may be made of, for example, a metal or other material that withstands the temperatures at which the glass ribbon 58 can be drawn. The support shaft 84 can now be moved laterally along the slide 87, for example to make the edge roll 82 moveable relative to the glass ribbon 58, for example via the operation of the motor 85. May be connected to a motor 85 such as a servomotor mounted on a mounting block 86 (the motor may or may not be the same motor, and provides the force to rotate the associated roll). Pull roll assembly 80 may also include an adjustment mechanism 88 to allow accurate and measured movement of pull roll 82, eg, incrementally, based on interface gears, grooves, and the like.

  Figures 3A and 3B illustrate a portion 58 of a glass ribbon, as well as a pair of edge rolls 72 and a pair in the process of releasing contact with the glass ribbon 58 in the thickness direction of the ribbon according to embodiments disclosed herein. Side cross-sectional view of the pull roll 82 of FIG. In the embodiment of FIG. 3A, edge roll 72 and pull roll 82 are in contact with glass ribbon 58 on both sides of glass ribbon 58. In the embodiment of FIG. 3B, the edge roll 72 and the pull roll 82 are opposite to each other with respect to the thickness direction of the glass ribbon 58 as shown by the arrow 90 for the edge roll 72 and by the arrow 95 for the pull roll 82. By moving the roll away from the glass ribbon 58, it is released from contact with the glass ribbon 58.

  FIG. 4 illustrates a portion 58 of the glass ribbon and a pair of edge rolls 72 and a pair of pull rolls 82 in the process of moving away from the ribbon in the width direction of the glass ribbon 58 in accordance with the embodiments disclosed herein. Shows a front view of the In the exemplary embodiment shown in FIG. 4, the edge roll 72 moves in the direction of the arrow 92 as a result of the lateral movement of the mounting block 76 slidable along the slide 77. Similarly, pull roll 82 moves in the direction of arrow 97 as a result of the lateral movement of mounting block 86, which is slidable along slide 87.

  Thus, the embodiments shown in FIGS. 3A and 3B initially move the rolls away from the glass ribbon 58 in opposite directions relative to the thickness direction of the glass ribbon 58 (e.g., FIGS. 3A and 3B). Then, by moving the roll away from the ribbon in the width direction of the glass ribbon 58 (for example, as shown in FIG. 4), the edge roll 72 and / or the pull roll 82 can be Can be used in concert with the embodiment shown in FIG.

  FIGS. 5A and 5B illustrate a portion of a wall 100 of a housing containing a glass ribbon (not shown in FIGS. 5A and 5B) and an edge in the process of releasing from the housing in accordance with the embodiments disclosed herein. A front cross-sectional view of roll 72 and pull roll 82 is shown. In the exemplary embodiment shown in FIGS. 5A and 5B, seal plates 102 and 104, for example, by remote control or manually, to facilitate movement of edge roll 72 and / or pull roll 82 from the housing. It may be moved or released first. The edge roll 72 then moves 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, pull roll 82 can move in the direction of arrow 99 as a result of the lateral movement of mounting block 86, which can slide along slide 87.

  FIG. 6 is a flow chart illustrating method steps in accordance with the embodiments disclosed herein. In particular, the flow chart of FIG. 6 illustrates exemplary steps for responding to an upset event in accordance with the embodiments disclosed herein. In the flowchart of FIG. 6, the hexagon 200 represents a stable process in the manufacture of glass articles such as glass sheets. Box 202 represents the upset or upset event defined herein. Upsets may be detected, for example, by an operator and / or by a process control system configured to detect upset events. Box 204 represents a step of increasing gas flow, such as airflow around at least one roll, such as at least one edge roll and / or at least one pull roll, such as edge roll 72 and pull roll 82 shown in FIG. There is. Such an increase in gas flow may, for example, allow more air to flow through the entire housing, and air through nozzles or orifices that are directed towards the at least one edge roll and / or at least one pull roll. It can be achieved by at least one of the flowing. Such an increase in gas flow can occur while at least one roll is still in contact with the glass ribbon, and can also occur after the at least one roll has been released from contact with the glass ribbon. You can continue. While some amount of gas, such as air, already flows into the housing containing the glass ribbon, increasing the flow rate of the gas minimizes or prevents glass wrapping around the roll, such as an edge roll or pull roll It can also help. The increase in gas flow is achieved remotely by an operator or by a process control system that activates an automatic mechanism to increase the gas flow around the at least one roll above a predetermined level by remote control. be able to.

The extent to which the glass is wound on the roll is, in some embodiments, a function of the viscosity of the glass, such as the viscosity of the glass ribbon, at least to a certain extent, at the point of contact with the roll. It is a function of the viscosity of the glass ribbon closest to the roll, in the sense that it can be a function such as 10 ^7.6 poise to about 10 ¹³ poise, etc. and in the range of about 10 ⁴ poise to about 10 ^14.5 poise. It is possible.

  Continuing with FIG. 6, the diamond 206 represents a first decision point for glass wrapping around the at least one roll, such as at least one edge roll and / or at least one pull roll. In particular, if the amount of glass on the periphery of the roll exceeds a predetermined amount, such as if the glass at the outer periphery has a radial thickness exceeding the thickness of the glass ribbon, then at least one roll is represented by box 208; And, for example, as shown in FIGS. 2 to 4 for the edge roll 72 and the pull roll 82, it can be released from contact with the glass ribbon. The determination of whether the amount of glass on the outer surface of the at least one roll exceeds a predetermined amount monitors, for example, the amount of glass on the periphery of the at least one roll, for example by using a camera or other monitoring device The monitor may be an operator monitor and / or be included as a component of a process control system. Release of the at least one roll may be accomplished remotely, such as by an operator or process control system operating an automation mechanism to release the at least one roll from contact with the glass ribbon, for example by remote control. The system includes a mechanism for monitoring the amount of glass on the periphery of at least one roll in contact with the glass ribbon. The system also includes a mechanism for remotely releasing the at least one roll from contact with the glass ribbon if the amount of glass at the periphery of the roll exceeds a predetermined amount.

  If the amount of glass on the periphery of the roll does not exceed the predetermined amount, a quick release of at least one roll is selected as part of the remaining steps of the upset recovery procedure, as represented by box 218 It does not have to be. In this case, at least one roll can still be released at some point, but if the amount of glass on the periphery of the roll does not exceed the predetermined amount, the release of the roll is relative in the upset recovery procedure Priorities may be low, for example, manually or remotely through the use of an automation system. Once the upset recovery procedure is complete, as represented by hexagon 220, the stable process for manufacturing the glass article can be resumed.

  Diamond 210 represents a second decision point regarding the release of the at least one edge roll from the housing containing the glass ribbon and the at least one edge roll. Represented by box 212 if, for example, the upset condition in the housing exceeds a predetermined threshold, such as when it is expected that irreversible damage to at least one roll is imminent, and, for example, an edge As shown in FIGS. 5A and 5B for roll 72 and pull roll 82, at least one roll can be released from the housing. The release of the at least one roll can be accomplished remotely, such as by an operator or a process control system operating an automation mechanism to release the at least one roll from the housing, for example by remote control. An operator or process control system that operates an automated mechanism to remove seal components such as seal plates 102 and 104 of FIG. 5A to facilitate release of at least one roll from the housing, such release also. May also be included.

  If the upset condition of the housing containing the glass ribbon does not exceed the predetermined threshold, quick release of at least one roll from the housing is not selected as part of the remaining steps of the upset recovery procedure there is a possibility. In this case, at least one roll can still be released from the housing at some point, but if the upset status of the housing containing the glass ribbon does not exceed the predetermined amount, the roll from the housing Deactivation can be of lower relative priority in the upset recovery procedure, and can be done manually, for example, or remotely through the use of an automation system.

  After at least one roll has been released from the housing, as represented by box 214, the roll may be placed, such as by placing the replacement roll on the support shaft when the roll assembly is outside the housing, It can be replaced with at least one replacement roll. Once at least one replacement roll has been placed on the support shaft, the roll assembly can be repositioned back into the interior of the housing, as represented by box 216.

  Although the above embodiments are described with reference to the fusion downdraw process, such embodiments are also applicable to other glass forming processes such as float process, slot draw process, updraw process, and press rolling process. It should be understood that it is applicable.

  It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present disclosure without departing from the spirit and scope of the present disclosure. Thus, it is intended that the present disclosure extend to such modifications and variations provided that they fall within the scope of the appended claims and their equivalents.

  Hereinafter, preferred embodiments of the present invention will be described separately.

Embodiment 1
A method for responding to upset events in the production of glass articles, comprising:
Monitoring the amount of glass at the outer periphery of the at least one roll in contact with the glass ribbon; and the at least one roll from contact with the glass ribbon if the amount of glass at the outer periphery of the roll exceeds a predetermined amount Remotely releasing the

Embodiment 2
The method according to embodiment 1, wherein the method further comprises the step of increasing the gas flow around the at least one roll.

Embodiment 3
The glass ribbon and the at least one roll are housed in a housing, and the method further comprises the step of releasing the at least one roll from the housing by remote control. The method according to Form 1.

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

Embodiment 5
The viscosity of the glass ribbon, in the roll contact point, which lies in the range from about 10 ^7.6 poises to about ¹⁰¹³ poises, method of embodiment 4.

Embodiment 6
The method of embodiment 1, wherein the at least one roll comprises an edge roll.

Embodiment 7
The method of embodiment 1, wherein the at least one roll comprises a pull roll.

Embodiment 8
The method of embodiment 1, wherein the monitoring step comprises the use of a camera.

Embodiment 9
The method of embodiment 2, wherein the gas comprises air.

Embodiment 10
A system for responding to upset events in the production of glass articles, comprising:
A device for monitoring the amount of glass at the outer periphery of at least one roll in contact with the glass ribbon; and the at least one roll from contact with the glass ribbon if the amount of glass at the outer periphery of the roll exceeds a predetermined amount Release the system remotely, including configuration.

Embodiment 11
11. The system according to embodiment 10, wherein the system further comprises an arrangement for increasing gas flow around the at least one roll.

Embodiment 12
11. The apparatus according to embodiment 10, wherein the glass ribbon and the at least one roll are contained within a housing, and the system further comprises an arrangement for remotely releasing the at least one roll from the housing. system.

Embodiment 13
11. The system of embodiment 10, wherein the viscosity of the glass ribbon is in the range of about 10 ⁴ poise to about 10 ^14.5 poise at the roll contact point.

Fourteenth Embodiment
The viscosity of the glass ribbon, in the roll contact point, which lies in the range from about 10 ^7.6 poises to about ¹⁰¹³ poises, according to the embodiment 13 system.

Embodiment 15
11. The system of embodiment 10, wherein the at least one roll comprises an edge roll.

Sixteenth Embodiment
11. The system of embodiment 10, wherein the at least one roll comprises a pull roll.

Seventeenth Embodiment
11. The system according to embodiment 10, wherein the device for monitoring the amount of glass at the periphery of at least one roll in contact with the glass ribbon comprises a camera.

Embodiment 18
The system of embodiment 11, wherein the gas comprises air.

DESCRIPTION OF SYMBOLS 10 glass manufacturing apparatus / fusion downdraw apparatus 12 glass melting furnace 14 glass melting container 16 upstream glass manufacturing apparatus 18 storage bin 20 raw material delivery device 22 motor 24 raw material 26 arrow 28 molten glass 30 downstream glass manufacturing apparatus 32 1st connection conduit 34 Fin vessel 36 mixing vessel 38 second connection conduit 40 delivery container 42 molded body 44 outlet conduit 46 third connection conduit 48
Reference Signs List 50 inlet conduit 52 trough 54 convergent molding surface 56 lower end 58 glass ribbon 60 extension direction 62 glass sheet 64 robot 65 grasper 70 edge roll assembly 72 edge roll 74 support shaft 75 motor 76 mounting block 77 slide 78 adjustment mechanism 80 pull roll assembly 82 Pull roll 84 Support shaft 85 Motor 86 Mounting block 87 Slide 88 Adjustment mechanism 90, 92, 94, 95, 97, 99 Arrow 100 Glass separation device

Claims (10)

A method for responding to upset events in the production of glass articles, comprising:
Monitoring the amount of glass at the outer periphery of the at least one roll in contact with the glass ribbon; and the at least one roll from contact with the glass ribbon if the amount of glass at the outer periphery of the roll exceeds a predetermined amount Remotely releasing the   The method of claim 1, wherein the method further comprises increasing gas flow around the at least one roll.   3. The method according to claim 1, wherein the glass ribbon and the at least one roll are accommodated in a housing, and the method further comprises releasing the at least one roll from the housing by remote control. The method described in 2.   A method according to any one of the preceding claims, characterized in that the at least one roll comprises an edge roll.   A method according to any one of the preceding claims, characterized in that the at least one roll comprises a pull roll. A system for responding to upset events in the production of glass articles, comprising:
A device for monitoring the amount of glass at the outer periphery of at least one roll in contact with the glass ribbon; and the at least one roll from contact with the glass ribbon if the amount of glass at the outer periphery of the roll exceeds a predetermined amount Release the system remotely, including configuration.   The system according to claim 6, wherein the system further comprises an arrangement for increasing gas flow around the at least one roll.   The system according to claim 6 or 7, characterized in that the glass ribbon and the at least one roll are housed in a housing and the system further comprises a configuration for remotely releasing the at least one roll from the housing. System described.   The system according to any one of claims 6 to 8, characterized in that the at least one roll comprises an edge roll.   A system according to any one of claims 6 to 8, characterized in that the at least one roll comprises a pull roll.

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