摘要:
A float glass system includes a float bath having an entrance end and an exit end. At least one machine vision camera is located to view an interior of the float bath. At least one sensor is connected to the float bath to measure an operating parameter of the float bath. At least one operating device is connected to the float bath. The at least one machine vision camera, the at least one sensor, and the at least one operating device are connected to a control system configured to control the operating device based on input from the at least one machine vision camera and/or the at least one sensor.
摘要:
A process for producing a glass substrate, which includes forming molten glass obtained by melting raw materials into a glass ribbon in a float bath, annealing the glass ribbon by a cooling apparatus, and cutting the glass ribbon to form the glass substrate, where the hydrogen concentration in the atmosphere of a float bath exceeds 3%, and the glass retention time in the float bath is from 4 to 15 minutes.
摘要:
To provide a glass substrate which has a high glass transition temperature, which has a thermal expansion coefficient close to that of soda lime glass, which has a low specific gravity, which will hardly undergo yellowing, and which further has good melting characters and is thereby produced with high productivity.A glass substrate which has a composition comprising, as represented by mass percentage based on oxides, SiO2 55 to 65%, Al2 O3 4 to 8%, MgO 6 to 9%, CaO 0.1 to 5%, SrO 0.5 to 6%, BaO 0 to 2%, MgO + CaO + SrO + BaO 6.6 to 19%, Na2 O 0 to 5%, K2 O 9.5 to 21%, Na2 O + K2 O 10 to 22%, ZrO2 0.5 to 5%, Fe2 O30.06 to 0.15%, which has a specific gravity of at most 2.7, which has an average thermal expansion coefficient from 50 to 350° C. of from 80×10−7/° C. to 90×107/° C., which has a glass transition temperature of at least 640° C., and wherein when the viscosity is η, the temperature at which log η=2 is satisfied is at most 1,550° C., and the yellow coloring b* on the glass surface is at most 8.
摘要翻译:为了提供玻璃化转变温度高的玻璃化转变温度,该玻璃基板的热膨胀系数接近钠钙玻璃的热膨胀系数,该玻璃化转变温度比较低,难以发生变黄,并且还具有良好的熔融特性 生产效率高。 一种玻璃基板,其组成为以氧化物的质量百分比表示,SiO 2 55〜65%,Al 2 O 3 4〜8%,MgO 6〜9%,CaO 0.1〜5%,SrO 0.5〜6%,BaO 0至2%,MgO + CaO + SrO + BaO 6.6至19%,Na 2 O 0至5%,K 2 O 9.5至21%,Na 2 O + K 2 O 10至22%,ZrO 2 0.5至5%,Fe 2 O 3 0.06 至0.15%,其比重至多为2.7,其平均热膨胀系数为50〜350℃,为80×10-7 /℃至90×107 /℃,具有 玻璃化转变温度至少为640℃,并且其中当粘度为& g时,满足log&eggr = 2的温度为至多1550℃,玻璃表面上的黄色着色b * 最多8。
摘要:
The present invention provides a method for manufacturing a float glass by floating the glass on a molten tin that is contained in a molten tin bath, which includes the steps of a) discharging a portion of the molten tin in the molten tin bath to the outside of the molten tin bath; b) removing oxygen dissolved in the molten tin that is discharged from the molten tin bath by injecting an oxygen stripping gas that contains hydrogen into the molten tin; and c) returning the molten tin from which oxygen is removed to the molten tin bath, and an apparatus for manufacturing the same.
摘要:
An apparatus for manufacturing a float glass, including a float bath for storing a molten metal on which a molten glass flows, wherein the molten metal flows in the float bath, comprises a discharge slot having substantially the same size as width of the molten glass to discharge a molten metal crashing against a wall of a downstream end of the float bath and dross floating on the molten metal, and formed through the wall substantially parallel to a traveling direction of the molten glass; connecting channels for communicating the discharge slot with both sides of the float bath; and dross collecting members for collecting the dross.
摘要:
It is an object of the present invention to provide a device for manufacturing float glass, which is capable of not only making the circulation paths for the molten metal compact but also suppressing the occurrence of heat loss. In a method for manufacturing float glass comprising sucking a molten glass ribbon in a substantially vertical direction along both edges of the molten glass ribbon to form recessed portions on a bath surface, and carrying out the flat glass formation with the edges being flowed into and held by the recessed portions; circulation ducts are used to circulate the molten metal to form the recessed portions, each of the circulation ducts comprising an intake duct and an return duct, and the molten metal is circulated through a path for the return duct after flowing out of the intake duct, the path for the return duct being formed between the intake duct and refractory bricks, the refractory bricks being disposed outside the intake duct so as to cover the intake duct, being spaced from the intake duct by a gap.
摘要:
The present invention provides a glass sheet formed on molten tin, that exhibits a high transmittance that is originally inherent to its composition. In this glass sheet, the difference between a visible light reflectance of a surface formed in contact with the molten tin and a visible light reflectance of a surface on the opposite side thereof is not greater than 0.25%. And when the glass sheet's thickness is 4 mm, a light transmittance at 540 nm wavelength is at least 91.5%, and a light transmittance at 450 nm wavelength is at least 91.0%, and after irradiating UV light for 6 hours as specified in the radiation-proofing test according to JIS R3212, a light transmittance at 540 nm wavelength is at least 91.0% and a light transmittance at 450 nm wavelength is at least 90.5%.
摘要:
A method and apparatus for producing a sheet glass includes pouring a molten glass into a bathtub containing a molten metal so that it will form a molten glass stream having a constant width in a high temperature zone on the molten metal bath. The molten glass stream in the form of a ribbon having a desired thickness is led into a subsequent shaping zone, wherein, in the high temperature zone, the molten metal level in the vicinity of the edge of the molten glass stream is differentiated from the molten metal level at the center of the glass stream to complement a force of the molten glass stream for expanding or contracting in the width direction and thereby to maintain the edge at a predetermined position.
摘要:
A method for holding an edge of a molten glass flow, comprising forming a molten glass flow by continuously feeding molten glass on a bath surface of molten metal contained in a vessel, holding an edge of the molten glass flow in a width direction thereof when advancing the molten glass flow to draw the molten glass flow in a glass ribbon having a target thickness, and controlling a flow of the molten metal so that a bath surface level in height of the molten metal in the vicinity of the edge of the molten glass flow is different from that of the molten metal in the vicinity of a central portion of the molten glass flow in the width direction thereof, whereby a force to spread or narrow the molten glass flow in the width direction is compensated so as to hold the edge of the molten glass flow at a predetermined position.
摘要:
A float glass forming chamber is cooled by circulation of molten metal through passages separate from the molten metal pool upon which the glass is supported.