Methods and systems are provided for automated shaping of a glass sheet. The methods comprise preheating the glass, bending the glass through selective, and focused beam heating through the use of an ultra-high frequency, high-power electromagnetic wave, and computer implemented processes utilizing thermal and shape (positional) data obtained in real-time, and cooling the glass sheet to produce a glass sheet suitable for use in air and space vehicles.

Provided is a manufacturing method for a glass article, including: a pre-heating step (S1) of heating a transfer pipe (7); and a transfer step (S4) of causing molten glass to flow through the transfer pipe (7) after the pre-heating step (S1). The transfer pipe (7) includes a main body portion (8) having a tubular shape and a flange portion (9a, 9b) formed on an end portion of the main body portion (8). The main body portion (8) is retained by a refractory (10). In the pre-heating step (S1), the main body portion (8) is heated while the flange portion (9a, 9b) is movably supported so that the flange portion (9a, 9b) is moved in accordance with extension of the main body portion (8).

Methods and systems are provided for automated shaping of a glass sheet. The methods comprise preheating the glass, bending the glass through selective, and focused beam heating through the use of an ultra-high frequency, high-power electromagnetic wave, and computer implemented processes utilizing thermal and shape (positional) data obtained in real-time, and cooling the glass sheet to produce a glass sheet suitable for use in air and space vehicles.

Methods and systems are provided for automated shaping of a glass sheet. The methods comprise preheating the glass, bending the glass through selective, and focused beam heating through the use of an ultra-high frequency, high-power electromagnetic wave, and computer implemented processes utilizing thermal and shape (positional) data obtained in real-time, and cooling the glass sheet to produce a glass sheet suitable for use in air and space vehicles.

A glass sheet forming and annealing system disclosed provides control of edge stresses by maintaining a press formed glass sheet on an annealing ring (72) below a heated upper forming mold (58) within a forming station (12) for slow cooling toward the glass strain point temperature.

A glass sheet forming and annealing system disclosed provides control of edge stresses by maintaining a press formed glass sheet on an annealing ring (72) below a heated upper forming mold (58) within a forming station (12) for slow cooling toward the glass strain point temperature.

Provided are: a glass substrate that achieves a high strain point while having a low devitrification temperature; and a method for producing said glass substrate. This glass substrate for a display is made of a glass comprising SiO.sub.2 and Al.sub.2O.sub.3, comprising 0% or more to less than 3% B.sub.2O.sub.3 and from 5 to 14% BaO in mass %, and substantially devoiding Sb.sub.2O.sub.3, wherein the devitrification temperature is 1235° C. or lower and the strain point is 720° C. or higher. Alternatively, this glass substrate for a display is made of a glass comprising SiO.sub.2 and Al.sub.2O.sub.3, comprising 0% or more to less than 3% B.sub.2O.sub.3, 1.8% or more MgO, and from 5 to 14% BaO in mass %, and substantially devoiding Sb.sub.2O.sub.3, wherein (SiO.sub.2+MgO+CaO)—(Al.sub.2O.sub.3+SrO+BaO) is less than 42%, the devitrification temperature is 1260° C. or lower, and the strain point is 720° C. or higher. This method for producing said glass substrate for a display comprises: a melting step for melting, by using at least direct electrical heating, a glass material prepared to have a predetermined composition; a forming step for forming, into a flat glass sheet, the molten glass that has been melted in the melting step; and an annealing step for annealing the flat glass sheet, wherein a condition for cooling the flat glass sheet is controlled so as to reduce the heat shrinkage rate of the flat glass sheet.

Provided are: a glass substrate that achieves a high strain point while having a low devitrification temperature; and a method for producing said glass substrate. This glass substrate for a display is made of a glass comprising SiO.sub.2 and Al.sub.2O.sub.3, comprising 0% or more to less than 3% B.sub.2O.sub.3 and from 5 to 14% BaO in mass %, and substantially devoiding Sb.sub.2O.sub.3, wherein the devitrification temperature is 1235° C. or lower and the strain point is 720° C. or higher. Alternatively, this glass substrate for a display is made of a glass comprising SiO.sub.2 and Al.sub.2O.sub.3, comprising 0% or more to less than 3% B.sub.2O.sub.3, 1.8% or more MgO, and from 5 to 14% BaO in mass %, and substantially devoiding Sb.sub.2O.sub.3, wherein (SiO.sub.2+MgO+CaO)—(Al.sub.2O.sub.3+SrO+BaO) is less than 42%, the devitrification temperature is 1260° C. or lower, and the strain point is 720° C. or higher. This method for producing said glass substrate for a display comprises: a melting step for melting, by using at least direct electrical heating, a glass material prepared to have a predetermined composition; a forming step for forming, into a flat glass sheet, the molten glass that has been melted in the melting step; and an annealing step for annealing the flat glass sheet, wherein a condition for cooling the flat glass sheet is controlled so as to reduce the heat shrinkage rate of the flat glass sheet.

The present invention relates to a mold including a master mold having a first region master mold molding surface having a shape corresponding to a first region of a molded body, and a second region master mold molding surface having a shape corresponding to a second region of the molded body, and in which the master mold includes: an inner mold having the first region master mold molding surface; an outer mold having an accommodating concave portion capable of accommodating the inner mold therein and the second region master mold molding surface on at least a part of an outer edge of the accommodating concave portion; and a buffer material provided between the inner mold and a bottom surface of the accommodating concave portion, the buffer material being pressed and deformed with relative movement of the inner mold and the outer mold.

The present invention relates to a mold including a master mold having a first region master mold molding surface having a shape corresponding to a first region of a molded body, and a second region master mold molding surface having a shape corresponding to a second region of the molded body, and in which the master mold includes: an inner mold having the first region master mold molding surface; an outer mold having an accommodating concave portion capable of accommodating the inner mold therein and the second region master mold molding surface on at least a part of an outer edge of the accommodating concave portion; and a buffer material provided between the inner mold and a bottom surface of the accommodating concave portion, the buffer material being pressed and deformed with relative movement of the inner mold and the outer mold.