摘要:
A strengthened glass sheet product along with a process and an apparatus for strengthening a glass sheet are provided. The process comprises cooling the glass sheet by non-contact thermal conduction for sufficiently long to fix a surface compression and central tension of the sheet. The process results in thermally strengthened glass sheets having improved breakage properties.
摘要:
A lift device for lifting a glass sheet in a glass processing system includes a lift jet array having peripheral lift jet outlets and inner lift jet outlets disposed inwardly of the peripheral lift jet outlets. Furthermore, each lift jet outlet is operable to allow gas to flow toward the glass sheet. The lift device also includes a control unit for controlling operation of the lift jet outlets, and the control unit is configured to commence operation of at least one of the inner lift jet outlets prior to commencing operation of at least one of the peripheral lift jet outlets.
摘要:
Disclosed herein are systems for shaping a glass sheet comprising a roll conveyor comprising a plurality of rollers for conveying the glass sheet along a plane; a lift jet array comprising a plurality of nozzles, one or more of the plurality of nozzles comprising a tip having a plurality of orifices; and a shaping mold located above the roll conveyor, wherein the lift jet array is positioned below the roll conveyor such that each nozzle tip is located above the centerline of the plurality of rollers. Also disclosed herein are methods for shaping a glass sheet comprising heating the glass sheet and conveying the glass sheet on a roll conveyor to a position between the lift jet array and the shaping mold, wherein gas flows from the lift jet array with a force sufficient to lift the glass sheet from the roll conveyor.
摘要:
The invention relates to a method of heating a glass sheet for tempering. It comprises conveying the glass sheet on top of rollers in a roller-hearth furnace, heating the glass sheet in the roller-hearth furnace to a transfer temperature at which the glass sheet is transferred into an air support furnace. The glass sheet, while resting on an air cushion, is carried on an air support table and the glass sheet is heated in the air support furnace to a tempering temperature. The transfer temperature is not lower than 620° C. and not higher than 675° C. and the tempering temperature is not lower than 650° C. and not higher than 720° C.
摘要:
A strengthened glass sheet product along with a process and an apparatus for strengthening a glass sheet are provided. The process comprises cooling the glass sheet by non-contact thermal conduction for sufficiently long to fix a surface compression and central tension of the sheet. The process results in thermally strengthened glass sheets having improved breakage properties.
摘要:
Disclosed herein are systems for shaping a glass sheet comprising a roll conveyor comprising a plurality of rollers for conveying the glass sheet along a plane; a lift jet array comprising a plurality of nozzles, one or more of the plurality of nozzles comprising a tip having a plurality of orifices; and a shaping mold located above the roll conveyor, wherein the lift jet array is positioned below the roll conveyor such that each nozzle tip is located above the centerline of the plurality of rollers. Also disclosed herein are methods for shaping a glass sheet comprising heating the glass sheet and conveying the glass sheet on a roll conveyor to a position between the lift jet array and the shaping mold, wherein gas flows from the lift jet array with a force sufficient to lift the glass sheet from the roll conveyor.
摘要:
An apparatus for shaping a glass sheet includes an engagement member including a flexible bumper comprising a flexible material. The flexible bumper is configured to operate at the forming temperature to reduce an impact stress between the engagement member and the edge portion of the glass sheet. In another example, an apparatus for shaping a sheet of glass includes a push member configured to engage an end edge portion of the glass sheet to push the glass sheet to be transported over the support surface. The push member includes a push flange extending in a direction away from the support surface. The push flange includes a plurality of apertures configured to increase the resistance of conductive heat transfer between the end edge portion of the glass sheet and the push member. In a further example an engagement member can fabricated from a material having a coefficient of thermal conductivity that is less than a coefficient of thermal conductivity of the stainless steel. In further examples, methods include using the apparatus to shape a glass sheet.
摘要:
In order to obtain glass or glass ceramic materials having increased strength, the invention provides a method for producing glass or glass ceramic articles, which comprises the steps: producing an initial glass body (11), mounting the initial glass body (11) on a gas cushion (13) between a levitation support (1) and the initial glass body (11), and at least partially ceramizing the initial glass body (11) on the levitation support (1). The levitation support comprises at least one continuous surface region (3) having at least one gas feed region (151, 152, 153) where levitation gas for the gas cushion (13) is fed out from the levitation support, and at least one gas discharge region (171 172, 173) where gas from the gas cushion (13) is at least partially discharged into the levitation support.
摘要:
For bending a glass sheet so that the glass sheet has a compound curvature, an apparatus comprises a furnace including hearth beds on a bed support and a quenching unit provided with upper and lower air blowers. The final hearth bed may have a top surface with a simple curvature, be provided with one upstream corner cut away thereby defining a cut surface section and arranged in such a manner that the cut surface section is nearly parallel to the hearth bed adjacent to the final hearth bed. Alternatively, the final hearth bed may have a top surface with a compound curvature, so that the glass sheet is bent under the conditions set by controlling a temperature in a downstream part of the furnace, adjusting the inclination of the lower air blower and/or rotating final hearth bed so as to reverse the upstream and downstream ends thereof.
摘要:
A method for bending a glass sheet is provided wherein the glass sheet is put on a bending surface of a frame unit to be preliminarily bent by gravity before the glass sheet is pressed by an upper mold and frame unit. The method is utilized for controlling the amount of preliminary bending so as to control deformation of the glass sheet caused by the preliminary bending and pressing occurs on the preliminary bent glass sheet by the upper mold and the frame unit.