METHOD FOR MANUFACTURING GLASS BLANK FOR MAGNETIC DISK, METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR MAGNETIC DISK, GLASS BLANK FOR MAGNETIC DISK

A method for manufacturing a glass blank for magnetic disk (1) and a method for manufacturing a glass substrate for magnetic disk are provided which are capable of producing a glass blank for magnetic disk (1) having a good surface waviness by press forming. The method includes a forming process of...

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Bibliographic Details
Main Authors ISONO, Hideki, MURAKAMI, Akira, SATO, Takashi, TANINO, Hidekazu, SATO, Masamune
Format Patent
LanguageEnglish
Published 24.07.2018
Subjects
CHEMISTRY
GLASS
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
METALLURGY
MINERAL OR SLAG WOOL
PHYSICS
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Summary:A method for manufacturing a glass blank for magnetic disk (1) and a method for manufacturing a glass substrate for magnetic disk are provided which are capable of producing a glass blank for magnetic disk (1) having a good surface waviness by press forming. The method includes a forming process of press-forming a lump of molten glass using a pair of dies (121, 122), wherein in the forming process, press forming is performed using thermally equalizing means for reducing a difference in temperature in the press forming surface of the die during pressing of the molten glass. (Fig. 4)
Bibliography:Application Number: MY2013PI701533