MY163557A - Method of manufacturing glass blank for magnetic recording medium glass substrate, method of manufacturing magnetic recording medium glass substrate, and method of manufacturing magnetic recording medium - Google Patents

Method of manufacturing glass blank for magnetic recording medium glass substrate, method of manufacturing magnetic recording medium glass substrate, and method of manufacturing magnetic recording medium

Info

Publication number
MY163557A
MY163557A MYPI2013000582A MYPI2013000582A MY163557A MY 163557 A MY163557 A MY 163557A MY PI2013000582 A MYPI2013000582 A MY PI2013000582A MY PI2013000582 A MYPI2013000582 A MY PI2013000582A MY 163557 A MY163557 A MY 163557A
Authority
MY
Malaysia
Prior art keywords
recording medium
magnetic recording
manufacturing
glass substrate
glass
Prior art date
Application number
MYPI2013000582A
Inventor
Akira Murakami
Makoto Osawa
Nobuhiro Sugiyama
Takashi Satou
Hidekazu Tanino
Hideki Isono
Kinobu Osakabe
Takao Motohashi
Original Assignee
Hoya Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2010221316A external-priority patent/JP5559651B2/en
Priority claimed from JP2010253791A external-priority patent/JP5476276B2/en
Application filed by Hoya Corp filed Critical Hoya Corp
Publication of MY163557A publication Critical patent/MY163557A/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/8404—Processes or apparatus specially adapted for manufacturing record carriers manufacturing base layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/027—Particular press methods or systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30—Feeding material to presses
    • B30B15/302—Feeding material in particulate or plastic state to moulding presses
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • C03B11/06—Construction of plunger or mould
    • C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
    • C03B11/088—Flat discs
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
    • C03B7/10—Cutting-off or severing the glass flow with the aid of knives or scissors or non-contacting cutting means, e.g. a gas jet; Construction of the blades used
    • C03B7/11—Construction of the blades
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/70—Horizontal or inclined press axis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

A METHOD OF MANUFACTURING A GLASS BLANK FOR A MAGNETIC RECORDING MEDIUM GLASS SUBSTRATE IN WHICH, AFTER A PAIR OF PRESS MOLDS PLACED SO AS TO BE OPPOSED TO EACH OTHER IN A HORIZONTAL DIRECTION WITH PRESS-MOLDING SURFACES (52A) THEREOF AND THE TEMPERATURES OF THE PRESS-MOLDING SURFACES BEING SUBSTANTIALLY THE SAME ARE BROUGHT INTO CONTACT WITH A MOLTEN GLASS GOB (24) SUBSTANTIALLY AT THE SAME TIME, PRESS MOLDING IS CARRIED OUT TO PRODUCE PLATE GLASS AND THE PLATE GLASS CONTINUES TO BE PRESSED WITH THE PAIR OF MOLDS, AND THEN, WHEN THE PLATE GLASS IS TAKEN OUT, THE DURATION TIME OF PRESSING THE PLATE GLASS IS CONTROLLED SO THAT THE FLATNESS OF THE GLASS BLANK IS 10 µM OR LESS, AND A METHOD OF MANUFACTURING A MAGNETIC RECORDING MEDIUM GLASS SUBSTRATE, A METHOD OF MANUFACTURING A MAGNETIC RECORDING MEDIUM, AND AN APPARATUS FOR MANUFACTURING A GLASS BLANK FOR A MAGNETIC RECORDING MEDIUM GLASS SUBSTRATE USING THE SAME. THE MOST ILLUSTRATIVE DRAWING:
MYPI2013000582A 2010-09-30 2011-09-29 Method of manufacturing glass blank for magnetic recording medium glass substrate, method of manufacturing magnetic recording medium glass substrate, and method of manufacturing magnetic recording medium MY163557A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010221316A JP5559651B2 (en) 2010-09-30 2010-09-30 Glass blank manufacturing method for magnetic recording medium glass substrate, magnetic recording medium glass substrate manufacturing method, and magnetic recording medium manufacturing method
JP2010253791A JP5476276B2 (en) 2010-11-12 2010-11-12 Glass blank manufacturing method for magnetic recording medium glass substrate, magnetic recording medium glass substrate manufacturing method, magnetic recording medium manufacturing method, glass blank manufacturing apparatus for magnetic recording medium glass substrate

Publications (1)

Publication Number Publication Date
MY163557A true MY163557A (en) 2017-09-29

Family

ID=45893143

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI2013000582A MY163557A (en) 2010-09-30 2011-09-29 Method of manufacturing glass blank for magnetic recording medium glass substrate, method of manufacturing magnetic recording medium glass substrate, and method of manufacturing magnetic recording medium

Country Status (4)

Country Link
CN (1) CN103155038A (en)
MY (1) MY163557A (en)
SG (1) SG189021A1 (en)
WO (1) WO2012043704A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2014051053A1 (en) * 2012-09-28 2016-08-22 Hoya株式会社 Method for manufacturing glass blank for magnetic disk, method for manufacturing glass substrate for magnetic disk, and glass blank for magnetic disk
MY168097A (en) * 2013-03-30 2018-10-11 Hoya Corp Method for manufacturing magnetic-disk glass substrate, magnetic-disk glass substrate, and method for manufacturing magnetic disk
JP2016092247A (en) * 2014-11-06 2016-05-23 株式会社ディスコ Method for polishing silicon carbide substrate

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01148717A (en) * 1987-12-07 1989-06-12 Canon Inc Forming device of optical element
JP3982229B2 (en) * 2001-10-17 2007-09-26 富士電機デバイステクノロジー株式会社 Glass substrate press molding apparatus and press molding method
JP4200422B2 (en) * 2002-07-26 2008-12-24 Ｈｏｙａ株式会社 Glass blank, information recording medium substrate, and information recording medium manufacturing method
US7395679B2 (en) * 2004-03-19 2008-07-08 Konica Minolta Opto, Inc. Method of manufacturing glass substrate for information recording medium
JP4380379B2 (en) * 2004-03-19 2009-12-09 コニカミノルタオプト株式会社 Manufacturing method of glass substrate for information recording medium
CN101588996B (en) * 2007-01-16 2012-02-22 柯尼卡美能达精密光学株式会社 Mold for glass substrate molding, method for producing glass substrate, method for producing glass substrate for information recording medium, and method for producing information recording medium
JP2008174401A (en) * 2007-01-16 2008-07-31 Konica Minolta Opto Inc Die for molding glass substrate, method of manufacturing glass substrate, method of manufacturing glass substrate for information recording medium, and method of manufacturing information recording medium
JP4834654B2 (en) * 2007-12-21 2011-12-14 Ｈｏｙａ株式会社 Thin glass manufacturing method, glass molded product manufacturing apparatus, information recording medium glass substrate manufacturing method, optical component manufacturing method

Also Published As

Publication number Publication date
SG189021A1 (en) 2013-05-31
CN103155038A (en) 2013-06-12
WO2012043704A1 (en) 2012-04-05

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