METHOD OF MANUFACTURING GLASS SUBSTRATE, AND STIRRING DEVICE
First Claim
Patent Images
1. A method of manufacturing a glass substrate, comprising:
- a melting step melting a glass starting material and obtaining molten glass;
a stirring step for stirring, inside a stirring vessel, the molten glass obtained in the melting step ; and
a molding step for molding a glass substrate from the molten glass stirred in the stirring step;
wherein in the method of manufacturing a glass substrate,the stirring vessel is provided with a chamber for directing the molten glass downward from above, or upwardly from below, and a stirrer for stirring the molten glass inside the chamber;
the stirrer has a shaft serving as a rotation axis disposed along the vertical direction, and blades disposed on a side face of the shaft, in a plurality of tiers from an uppermost tier to a lowermost tier along the axial direction of the shaft;
the blades have support plates extending orthogonally to the axial direction of the shaft, and ancillary plates disposed on a principal face of the support plates; and
in the stirring step, the stirrer rotates about the shaft as the rotation axis, whereby the ancillary plates create in the molten glass a flow in the radial direction of the shaft, and ancillary plates positioned between support plates of blades disposed in two adjacent tiers create, in the molten glass, a flow in the same direction.
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Accused Products
Abstract
A stirring device 100 comprises a chamber 101, and a stirrer 102 for stirring molten glass 7 in the chamber 101. The stirrer 102 has a shaft 105 as a rotation axis, and blades 106a-106e disposed in a plurality of tiers on a side wall of the shaft 105. The blades 106a-106e have support plates 108 and ancillary plates 109. The ancillary plates 109 create, in the molten glass 7, a flow in the radial direction of the shaft 105.
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Citations
15 Claims
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1. A method of manufacturing a glass substrate, comprising:
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a melting step melting a glass starting material and obtaining molten glass;
a stirring step for stirring, inside a stirring vessel, the molten glass obtained in the melting step ; and
a molding step for molding a glass substrate from the molten glass stirred in the stirring step;
wherein in the method of manufacturing a glass substrate,the stirring vessel is provided with a chamber for directing the molten glass downward from above, or upwardly from below, and a stirrer for stirring the molten glass inside the chamber; the stirrer has a shaft serving as a rotation axis disposed along the vertical direction, and blades disposed on a side face of the shaft, in a plurality of tiers from an uppermost tier to a lowermost tier along the axial direction of the shaft; the blades have support plates extending orthogonally to the axial direction of the shaft, and ancillary plates disposed on a principal face of the support plates; and in the stirring step, the stirrer rotates about the shaft as the rotation axis, whereby the ancillary plates create in the molten glass a flow in the radial direction of the shaft, and ancillary plates positioned between support plates of blades disposed in two adjacent tiers create, in the molten glass, a flow in the same direction. - View Dependent Claims (2, 3, 4, 5, 9, 10, 11, 12, 13, 14, 15)
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6. A method of manufacturing a glass substrate, comprising:
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a melting step for melting a glass starting material and obtaining molten glass;
a stirring step for stirring, inside a stirring vessel, the molten glass obtained in the melting step; and
a molding step for molding a glass substrate from the molten glass stirred in the stirring step;
wherein in the method of manufacturing a glass substrate,the stirring vessel is provided with a chamber for directing the molten glass downward from above, or upwardly from below, and a stirrer for stirring the molten glass inside the chamber; the stirrer has a shaft serving as a rotation axis disposed along the vertical direction, and blades disposed, on a side face of the shaft, in a plurality of tiers from an uppermost tier to a lowermost tier along the axial direction of the shaft; the blades have support plates extending orthogonally to the axial direction of the shaft, and ancillary plates disposed on a principal face of the support plates; and in the stirring step, the stirrer rotates about the shaft as the rotation axis, whereby upwardly from the support plates of the blade positioned in the uppermost tier, the ancillary plates arranged on the upper principal face of the support plates of the blade positioned in the uppermost tier create a first flow for moving the molten glass towards the shaft from the inner wall of the chamber, and create a second flow causing the molten glass moved by the first flow to ascend along the side face of the shaft. - View Dependent Claims (7)
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8. A stirring device comprising a chamber for directing molten glass downward from above, or upwardly from below;
- and a stirrer for stirring the molten glass inside the chamber;
whereinthe stirrer has a shaft serving as a rotation axis; and
blades disposed on a side face of the shaft, in a plurality of tiers from an uppermost tier to a lowermost tier along the axial direction of the shaft;the blades have support plates directly connected to the shaft, and ancillary plates disposed on a principal face of the support plates; the ancillary plates, when viewed along the axial direction of the shaft, are arranged so as to diverge from a straight line connecting a first edge connected to the shaft or closest to the shaft, and a center point that is the center of rotation of the shaft, moving from the first edge towards another edge positioned on the opposite side from the first edge; and the stirrer rotates about the shaft as the rotation axis, whereby the ancillary plates create a flow in the radial direction of the shaft in the molten glass, and ancillary plates positioned between the support plates of the blades disposed in two adjacent tiers create, in the molten glass, a flow in the same direction.
- and a stirrer for stirring the molten glass inside the chamber;
Specification