PLATE GLASS BLANK AND MANUFACTURING METHOD OF THE SAME, AND MANUFACTURING METHOD OF COVER GLASS PLATE

PLATE GLASS BLANK AND MANUFACTURING METHOD OF THE SAME, AND MANUFACTURING METHOD OF COVER GLASS PLATE

PROBLEM TO BE SOLVED: To provide a manufacturing method of a cover glass plate, which allows easily manufacturing of a cover glass plate having high-precision surface shapes on its both sides, and to provide a plate glass blank suitable for the manufacturing method, and a manufacturing method of the...

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1. Verfasser: TOMISAKA TOSHIYA
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
GLASS
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
METALLURGY
MINERAL OR SLAG WOOL
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creator TOMISAKA TOSHIYA
description PROBLEM TO BE SOLVED: To provide a manufacturing method of a cover glass plate, which allows easily manufacturing of a cover glass plate having high-precision surface shapes on its both sides, and to provide a plate glass blank suitable for the manufacturing method, and a manufacturing method of the plate glass blank.SOLUTION: In a drop step (A), a constant amount of molten glass 3 is dropped to a lower mold 1 having a concavity part 1a. In a press step (C), the molten glass 3 on the lower mold 1 is pressed with an upper mold 2 having a concavity part 2a for molding to fill the concavity part 2a of the upper mold 2 with the molten glass 3 for forming a first plane s1, and to fill the concavity part 1a of the lower mold 1 with the molten glass 3 to form a second plane S2 having concavity and convex parts. In processing steps from (D) to (G), surface-grinding or -polishing is performed to flatten the second plane S2 to produce a cover glass plate 8.
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subjects CHEMISTRY
GLASS
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
METALLURGY
MINERAL OR SLAG WOOL
title PLATE GLASS BLANK AND MANUFACTURING METHOD OF THE SAME, AND MANUFACTURING METHOD OF COVER GLASS PLATE
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