Entries |
Document | Title | Date |
20080202164 | Isopipe design feature to reduce sag - Disclosed is an isopipe for use in the manufacture of sheet glass by, and more specifically to an isopipe designed to control sag during use, as well as a method for reducing the sag of an isopipe used in a fusion process for molten glass. In one embodiment, the isopipe comprises a cavity that extends at least partially through the refractory body of the isopipe along its longitudinal length. The cavity has varying cross-sections configured such that, for at least a portion of the length of the isopipe, the load bending moment is greater than or generally equal to the gravity bending moment. In one embodiment, the neutral axis varies along the length of the cavity and has a similar profile to that of the gravity bending moment diagram. | 08-28-2008 |
20080202165 | Process to preserve isopipe during coupling - Methods for reducing stress on an isopipe during manufacture of a drawn glass sheet are disclosed including a method comprising providing an isopipe having a root, heating the isopipe to a predetermined temperature, maintaining the isopipe at the predetermined temperature for a period of time sufficient to relieve at least a portion of a tensile stress on the isopipe root, coupling the isopipe to a down-corner, and then providing glass to the isopipe. Also disclosed is a method comprising heating an isopipe such that the temperature difference between the weir and the root of the isopipe, after heating and prior to coupling, is less than about 100° C. A method comprising application of a compressive force to the ends of an isopipe root during heating is also disclosed. | 08-28-2008 |
20080264104 | Method and apparatus for making a glass sheet - In the formation of sheet glass by the overflow downdraw process, the width of usable sheet glass is maximized by downwardly flowing edge portions of the sheet over web-like members and thereafter over extensions which intersect with and are downwardly inclined relative to the web-like members to thin edge portions of the glass flow and maintain sheet width. The extension members are preferably removably attached to the web-like members, greatly facilitating replacement of the more easily damaged extension members. | 10-30-2008 |
20080282736 | Method and apparatus for minimizing inclusions in a glass making process - An apparatus for forming a glass sheet with reduced zircon inclusions in the glass sheet is disclosed. In one embodiment, the apparatus comprises heating elements distributed vertically between the weirs of a forming wedge and the root of the forming wedge, and wherein a thermal barrier is disposed between adjacent heating elements. A method of using the apparatus is also disclosed. | 11-20-2008 |
20090107182 | Pull roll apparatus and method for controlling glass sheet tension - A pull roll apparatus and method are described herein that can control a cross-draw tension and a down-draw tension of a glass sheet while manufacturing the glass sheet. In one embodiment, the pull roll apparatus includes a first driven stub roll pair, a second driven stub roll pair and a control device (e.g., PLC) that controls the first and second driven stub roll pairs while a first edge portion of the glass sheet is drawn between two vertically downtilted rolls associated with the first driven stub roll pair and while an opposing second edge portion of the glass sheet is drawn between two vertically downtilted rolls associated with the second driven stub roll pair. If desired, the pull roll apparatus may include a pulling roll assembly (located below the first and second driven stub rolls) or another set of driven stub roll pairs (located below the first and second driven stub roll pairs). | 04-30-2009 |
20090126406 | MANUFACTURING METHOD AND HEAT DRAWING APPARATUS FOR GLASS MEMBER - Since dispersion of height dimension is reduced in a spacer, it is possible to increase a yield in manufacturing processes and reduce a lord for inspecting products. There is provided a method of manufacturing a plate glass member to be used in an electronic device, the manufacturing method comprising: introducing a glass base material analogous to the glass member into a furnace body of which the temperature has been held equal to or higher than a softening temperature of the glass base material; heat-drawing the glass base material within the furnace body; and extracting the heat-drawn glass base material outside the furnace body, wherein the glass base material is introduced into the furnace body as a gap between the glass base material and an inner wall of the furnace body is shielded at a slot of the furnace body for the glass base material. | 05-21-2009 |
20090133441 | Method of manufacturing alkali-free glasses containing iron and tin as fining agents - Alkali-free glasses are disclosed which can be used to produce substrates for flat panel display devices, e.g., active matrix liquid crystal displays (AMLCDs). The glasses contain iron and tin as fining agents, and preferably are substantially free of arsenic and antimony. In certain embodiments, the glasses are also substantially free of barium. Methods for producing alkali-free glass sheets using a downdraw process (e.g., a fission process) are also disclosed. | 05-28-2009 |
20090205373 | Roll forming manufacturing method and apparatus of plate glass and product thereof - High quality plate glass free from surface defects, and excellent in macro thickness uniformity, flatness, and the like is manufactured by minimizing the part to be wasted. To that end, glass melt | 08-20-2009 |
20090235693 | Manufacturing Method of Plate Glass - Proposed is a manufacturing method to continuously fabricate plate glass which comprises supporting at least bottom surface of the traveling glass before stiffening by means of a gas generated from support members and controlling the gravitational effect on the glass to provide the partial displacement and deformation repeatedly while changing the position thereof so as to achieve propagation of overall glass extension. | 09-24-2009 |
20100064729 | Heat-resistant roll, production method thereof, and method of producing sheet glass using heat-resistant roll - Provide is a heat-resistant roll with improved effectively characteristics, a production method thereof, and a method of producing sheet glass using the heat-resistant roll. A method of producing a heat-resistant roll equipped with a roll portion containing 5% by weight or more of clay includes: a grinding step (S | 03-18-2010 |
20100071419 | APPARATUS AND METHOD FOR MANUFACTURING PLATE GLASS - An apparatus | 03-25-2010 |
20100122556 | PROCESS FOR PRODUCING GLASS SHEET AND GLASS SHEET PRODUCING EQUIPMENT - A situation where glass chip produced as a result of breakage of waste glass sheets floats in a cutting chamber when the waste glass sheets produced in glass sheet producing steps are collected is suppressed. Provided is a glass sheet production installation ( | 05-20-2010 |
20100162763 | OVERFLOW DOWNDRAW GLASS FORMING METHOD AND APPARATUS - The present invention discloses improved methods and apparatus for forming sheet glass. In one embodiment, the invention introduces a counteracting force to the stresses on the forming structure in a manner such that the thermal creep which inevitably occurs has a minimum impact on the glass flow characteristics of the forming structure. | 07-01-2010 |
20100212359 | SPINEL ISOPIPE FOR FUSION FORMING ALKALI CONTAINING GLASS SHEETS - A glass manufacturing system and method are described herein that use a forming apparatus (isopipe) made from or at least coated with a magnesium aluminate spinel material which is a chemically stable and compatible refractory material when used for forming an alkali-containing glass sheet. | 08-26-2010 |
20100212360 | APPARATUS AND METHOD FOR DRAWING A RIBBON OF GLASS - Apparatus and method for balancing the mass flow rate of molten glass flowing over a forming body to form a glass ribbon. The apparatus comprises upper and lower transition members that surround the glass ribbon as the glass ribbon is drawn from the forming body. The upper and lower transition members are independently moveable, and separated by a gap less than 8 cm across. The narrow gap minimizes disruption to the thermal environment contained within the upper and lower transition members, and is positioned a sufficient distance above the setting zone of the ribbon to minimize any influence on the dimensional consistency of the ribbon. | 08-26-2010 |
20100229601 | Process for Producing Float Plate Glass - In a process for producing a float plate glass having a plate thickness falling within a range from 0.1 mm to 2 mm, the process includes a step of draining a surface portion of a melted glass base material from an inside of a forming furnace or a glass-material melting furnace, in a region upstream from a location at which a width of glass ribbon is adjusted by top rolls. | 09-16-2010 |
20110048074 | GLASS COMPOSITIONS HAVING HIGH THERMAL AND CHEMICAL STABILITY AND METHODS OF MAKING THEREOF - Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs). In accordance with certain of its aspects, the glasses possess good dimensional stability as a function of temperature. | 03-03-2011 |
20110079049 | FINING OF BOROALUMINO SILICATE GLASSES - Glasses are disclosed which can be used to produce substrates for flat panel display devices, e.g., active matrix liquid crystal displays (AMLCDs). The glasses have MgO concentrations in the range from 1.0 mole percent to 3.0 mole percent and Σ[RO]/[Al | 04-07-2011 |
20110100056 | LOW FRICTION EDGE ROLL TO MINIMIZE FORCE CYCLING - An apparatus for drawing a glass ribbon including a shroud surrounding the glass ribbon and an edge roll that penetrates the shroud to contact the glass ribbon. The apparatus includes regulating a pressure within the seal assembly to be equal to or less than a pressure within the shroud and prevent ingress of relatively cooler outside gas into the hot interior of the shroud. The edge roll utilizes an air bearing to minimize friction that can produce periodic fluctuation of the ribbon as the edge roll is displaces in response to variations in the ribbon thickness or equipment dimensions. | 05-05-2011 |
20110100057 | METHOD AND APPARATUS FOR REDUCING HEAT LOSS FROM EDGE DIRECTORS IN A GLASS MAKING PROCESS - An apparatus for drawing a glass ribbon including a forming body having an edge director attached thereto, and an edge roll assembly disposed below the edge director, the edge roll assembly comprising a contact member coupled to the edge roller shaft and a thermal shroud disposed about the shaft to reduce heat loss from the edge director. A method of drawing glass using the edge roll assembly is also described. | 05-05-2011 |
20110126592 | Devices for Controlling Atmosphere over Molten-Glass Free-Surfaces - A chamber ( | 06-02-2011 |
20110209502 | METHODS AND APPARATUS FOR REDUCING HEAT LOSS FROM AN EDGE DIRECTOR - An apparatus for making a glass sheet includes a forming wedge with a pair of inclined forming surface portions converging along a downstream direction to form a root. The apparatus further includes an edge director intersecting with at least one of the pair of downwardly inclined forming surface portions, and a thermal shield configured to reduce heat loss from the edge director. Methods are also provided for reducing heat loss from the edge director with a thermal shield. | 09-01-2011 |
20110277506 | METHOD AND APPARATUS FOR HEATING GLASS SHEETS - A method for heating glass sheets includes alternately loading on a conveyor system two different sets of glass sheets with the glass sheets of each set having different properties than those of the other set so as to require different heating than each other; conveying the alternately loaded sets of glass sheets on the conveyor system along a plane of conveyance through a heating chamber having a heating system; and controlling operation of the heating system to provide two different sets of heating zones alternating along the direction of conveyance and respectively moving with the two sets of glass sheets so as to provide heating in the heating chamber of each set of glass sheets as required and in a different way than the heating of the other set of glass sheets. | 11-17-2011 |
20120096900 | METHOD OF MANUFACTURING GLASS MOLDING - In a method of manufacturing a glass molding, a lower mold includes a recess having a bottom portion and a side portion surrounding the bottom portion, and an outer peripheral planar portion surrounding an upper end of the side portion. A crossing angle between the side portion and the outer peripheral planar portion is set at more than or equal to 45 degrees. A dropping volume of the molten glass drop is such that, when dropped onto the lower mold, a volume of the molten glass drop located above the outer peripheral planar portion is 1.5 times to 6.0 times the volume of the molten glass drop filling the recess. | 04-26-2012 |
20120125050 | METHOD FOR MANUFACTURING GLASS PLATE - A method for manufacturing a glass plate includes preparing an accommodating part made of platinum or a platinum alloy, fining molten glass of a melted feedstock, stirring and homogenizing the molten glass, and supplying the molten glass to a forming apparatus. The fining the molten glass includes causing gas bubbles to float up and out from the molten glass, and causing absorption of the gas component in the molten glass and eliminating gas bubbles. The water vapor partial pressure of an atmosphere in the causing the gas bubbles is lower than the water vapor partial pressure in at least a portion of the causing the absorption of the gas component. A boundary between the causing the gas bubbles and the causing the absorption of the gas component is a temperature lower than the maximum temperature by 30° C. or more after the molten glass has reached the maximum temperature. | 05-24-2012 |
20120255327 | Disk roll and base material thereof - A disk roll base material includes 20 to 38 wt % of alumina silicate wool that include 40 to 60 wt % of alumina and 40 to 60 wt % of silica, and have a content of shots having a dimension of 45 μm or more of 5 wt % or less, 10 to 30 wt % of kibushi clay, 2 to 20 wt % of bentonite, and 20 to 40 wt % of mica. | 10-11-2012 |
20120272686 | Disk Roll and Base Material Thereof - A disk roll base material includes 25 to 50 wt % of ceramic wool, 5 to 30 wt % of kibushi clay, 2 to 20 wt % of bentonite, and 25 to 45 wt % of a filler selected from alumina, wollastonite and calcined kaolin clay. | 11-01-2012 |
20120318024 | Manufacturing method for a glass roll and manufacturing apparatus for a glass roll - A manufacturing method for a glass roll includes drawing a glass film downward vertically from a forming device, converting a delivery direction of the glass film from a vertical direction to a horizontal direction, continuously delivering the glass film to a downstream side by a horizontal conveyance section, and rolling the glass film into a roll shape on a downstream side of the horizontal conveyance section. While the glass film is supported in surface contact by an endless belt serving as a support section, which is provided in the horizontal conveyance section, a rolling force equal to or less than a static friction force, which is generated by a self-weight of the glass film between the glass film and the endless belt, is imparted to the glass film. | 12-20-2012 |
20130186144 | ELECTROMAGNETIC CASTING METHOD OF SILICON INGOT - Disclosed is an electromagnetic casting method of a silicon ingot in which a polycrystalline silicon ingot is continuously cast by charging silicon raw materials into a bottomless cold copper mold, melting the charged silicon raw materials through electromagnetic induction, pulling down to solidify the molten silicon, in which the length of a part of copper mold positioned below a lower end of an induction coil surrounding the copper mold is set to more than 40 mm and 180 mm or less. According to this method, a copper contamination of a silicon ingot incurred by a copper cold mold can be suppressed to produce a silicon ingot which is suitable as a starting material of the substrate of a solar cell. | 07-25-2013 |
20130219967 | METHOD AND DEVICE FOR PRODUCING POLYCRYSTALLINE SILICON BLOCKS - A crucible is filled with silicon material and is arranged in a process chamber. The silicon material in the crucible is melted and is subsequently cooled below the solidification temperature. During a time period, a plate element that has at least one passage may be arranged over the molten silicon in the crucible, and a gas flow may be directed onto the surface of the molten silicon at least partially via the at least one passage. Alternatively a crucible arrangement includes a crucible and a holding ring arranged on or above a crucible filled with silicon material. Additional silicon material may be received and held above the crucible by the holding ring. During the heating of the silicon material in the crucible and the holding ring, molten silicon is formed in a crucible, which is subsequently cooled below the solidification temperature of the silicon. | 08-29-2013 |
20130239620 | Directional Solidification Furnace Having Movable Insulation System - A directional solidification furnace is disclosed that includes one or more movable insulating members disposed adjacent sides of the crucible. In a first position, the insulating members restrict the flow of heat away from the sides of the crucible. In a second position, the insulating members do not appreciably restrict the flow of heat away from the sides of the crucible. An actuating system is used to move the insulating members between the first position and the second position. | 09-19-2013 |
20130239621 | Directional Solidification Furnace With Laterally Movable Insulation System - A directional solidification furnace is disclosed that includes one or more movable insulating members disposed beneath a bottom portion of the crucible. In a first position, the insulating members restrict the flow of heat away from the bottom portion of the crucible. In a second position, the insulating members do not restrict the flow of heat away from the bottom portion of the crucible. An actuating system is used to move the insulating members between the first position and the second position. | 09-19-2013 |
20130247618 | CONTINUOUS CASTING METHOD OF SILICON INGOT - Provided is a continuous casting method of a silicon ingot for continuously casting the silicon ingot by arranging, inside an induction coil, a bottomless cold crucible having a part along an axial direction that is circumferentially divided into a plurality of strip elements, forming molten silicon inside the cold crucible through electromagnetic induction heating by the induction coil, and solidifying the molten silicon while pulling it down from the cold crucible, wherein as the cold crucible, used is a cold crucible with Ni—B alloy plating on a portion in the inner surface thereof that faces the outer side surface of the molten silicon and the outer surface of the silicon ingot. The method can reduce the damage to the inner surface of the cold crucible, in addition to the contamination of cast ingots with impurities. | 09-26-2013 |
20130333420 | INTEGRAL CAPSULE FOR BLISTER SUPPRESSION IN MOLTEN GLASS - A precious metal structure which has an internal gas permeable membrane is described herein for a glass manufacturing vessel configured to have molten glass flow therein. The internal gas permeable membrane can be supplied with an atmosphere of gas (or gases) to control the flux of hydrogen into our out of the molten glass or otherwise improve the production of the molten glass. In this manner, the undesirable detrimental reactions that can occur at the interface of the molten glass and precious metal interface which can cause defects in the molten glass such as bubbles or solid inclusions can be stopped or at least substantially reduced. | 12-19-2013 |
20140033768 | METHOD FOR MANUFACTURING GLASS BLANK FOR MAGNETIC DISK, METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR MAGNETIC DISK - A method for manufacturing a glass substrate for magnetic disk is provided in which a glass is kept from being fused to a mold during press forming and shape processing to achieve a good circularity is efficiently performed. The method includes: a forming process of forming a disk-shaped glass blank by direct-pressing a molten glass by a pair of dies; and a shape processing process of performing at least one of inner hole formation and outer shape formation for forming a disk-shaped glass substrate by forming a cutting line on the principal face of the glass blank, followed by growing the cutting line to perform cutting. In the forming process, press forming is performed while the temperature of the pair of dies, over a period of time until a molten glass is separated from the die after coming into contact with the die, is set at a temperature lower than a glass transition point (Tg) and a mold release material is not attached to the surfaces of the pair of dies. | 02-06-2014 |
20140130550 | PULLING ROLLS WITH SPRING ELEMENTS HAVING INCREASED ANGULAR LENGTH FOR USE IN GLASS MANUFACTURING AND PROCESSES INCORPORATING THE SAME - In one embodiment, a pulling roll for drawing glass sheet in a down-draw process includes a shaft member and a compliant cover assembly positioned on the shaft member. The compliant cover assembly includes at least one traction disk positioned on the shaft member. The at least one traction disk includes an annular hub and a plurality of spring elements integrally formed with the annular hub. The spring elements project outward from the annular hub such that an end of each spring element is positioned radially outward from a base of each spring element and is circumferentially offset relative to the base of each spring element. | 05-15-2014 |
20140130551 | PULLING ROLLS WITH DEFLECTION LIMITATION FOR USE IN GLASS MANUFACTURING AND PROCESSES INCORPORATING THE SAME - In one embodiment, a pulling roll for drawing glass sheet in a down-draw process includes a shaft member and a compliant cover assembly positioned on the shaft member. The compliant cover assembly includes at least one traction disk and at least one deflection limiting disk positioned on the shaft member. The at least one traction disk includes an annular hub and a plurality of spring elements integrally formed with the annular hub. The at least one deflection limiting disk includes at least one deflection limiting element positioned on each deflection limiting disk. The at least one deflection limiting element engages at least a portion of at least one traction disk upon a predetermined amount of inward radial deflection of the plurality of spring elements, thereby limiting the inward radial deflection of the plurality of spring elements. | 05-15-2014 |
20140144181 | PRECISION FORMING OF SHEET GLASS AND SHEET ROLLING APPARATUS - An apparatus ( | 05-29-2014 |
20190144324 | METHODS AND APPARATUS FOR PROCESSING GLASS | 05-16-2019 |