FR2401879A1 - Press moulding hydrated glass - in a sealed chamber filled with inert gas or steam, to prevent dehydration - Google Patents

Press moulding hydrated glass - in a sealed chamber filled with inert gas or steam, to prevent dehydration

Info

Publication number
FR2401879A1
FR2401879A1 FR7726705A FR7726705A FR2401879A1 FR 2401879 A1 FR2401879 A1 FR 2401879A1 FR 7726705 A FR7726705 A FR 7726705A FR 7726705 A FR7726705 A FR 7726705A FR 2401879 A1 FR2401879 A1 FR 2401879A1
Authority
FR
France
Prior art keywords
steam
sealed chamber
inert gas
chamber filled
press moulding
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
FR7726705A
Other languages
French (fr)
Other versions
FR2401879B3 (en
Inventor
Roger Raymond Genisson
Daniel Marcel Goux
Jean-Pierre Marechal
Che Kuang Wu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Corning Glass Works
Original Assignee
Corning Glass Works
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
Application filed by Corning Glass Works filed Critical Corning Glass Works
Priority to FR7726705A priority Critical patent/FR2401879A1/en
Publication of FR2401879A1 publication Critical patent/FR2401879A1/en
Application granted granted Critical
Publication of FR2401879B3 publication Critical patent/FR2401879B3/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • C03B11/005—Pressing under special atmospheres, e.g. inert, reactive, vacuum, clean
    • 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
    • C03B2215/00—Press-moulding glass
    • C03B2215/40—Product characteristics
    • C03B2215/44—Flat, parallel-faced disc or plate products
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2215/00—Press-moulding glass
    • C03B2215/66—Means for providing special atmospheres, e.g. reduced pressure, inert gas, reducing gas, clean room

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

Optical glass pieces are mfd. from hydrated glass using a precision press moulding tool inside a sealed chamber flooded with an elevated pressure (100-120 bars) of N2, Ar, Kr, CO2 or steam. The moulding tool is pref. housed in an autoclave, the wall of which is traversed in a sealed manner by a press ram, and also by a gas supply duct. Used in the mfr. of lenses and mirrors for optical or opthalmic use. Improved surface finish is obtd. by preventing dehydration during mfr.
FR7726705A 1977-09-02 1977-09-02 Press moulding hydrated glass - in a sealed chamber filled with inert gas or steam, to prevent dehydration Granted FR2401879A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7726705A FR2401879A1 (en) 1977-09-02 1977-09-02 Press moulding hydrated glass - in a sealed chamber filled with inert gas or steam, to prevent dehydration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7726705A FR2401879A1 (en) 1977-09-02 1977-09-02 Press moulding hydrated glass - in a sealed chamber filled with inert gas or steam, to prevent dehydration

Publications (2)

Publication Number Publication Date
FR2401879A1 true FR2401879A1 (en) 1979-03-30
FR2401879B3 FR2401879B3 (en) 1980-07-04

Family

ID=9194997

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7726705A Granted FR2401879A1 (en) 1977-09-02 1977-09-02 Press moulding hydrated glass - in a sealed chamber filled with inert gas or steam, to prevent dehydration

Country Status (1)

Country Link
FR (1) FR2401879A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0057952A1 (en) * 1981-02-09 1982-08-18 Koninklijke Philips Electronics N.V. Method for the precision moulding of glass articles, method of manufacturing a mould, and mould for the precision moulding of glass articles
US4537467A (en) * 1982-06-21 1985-08-27 Asea Aktiebolag Hermetic sealing of gallium arsenide components

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0057952A1 (en) * 1981-02-09 1982-08-18 Koninklijke Philips Electronics N.V. Method for the precision moulding of glass articles, method of manufacturing a mould, and mould for the precision moulding of glass articles
US4537467A (en) * 1982-06-21 1985-08-27 Asea Aktiebolag Hermetic sealing of gallium arsenide components

Also Published As

Publication number Publication date
FR2401879B3 (en) 1980-07-04

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