GB1124468A - Production of glass sheet - Google Patents

Production of glass sheet

Info

Publication number
GB1124468A
GB1124468A GB54252/65A GB5425265A GB1124468A GB 1124468 A GB1124468 A GB 1124468A GB 54252/65 A GB54252/65 A GB 54252/65A GB 5425265 A GB5425265 A GB 5425265A GB 1124468 A GB1124468 A GB 1124468A
Authority
GB
United Kingdom
Prior art keywords
vacuum pump
molten metal
parts
tank bottom
production
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.)
Expired
Application number
GB54252/65A
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.)
PPG Industries Inc
Original Assignee
Pittsburgh Plate Glass Co
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 Pittsburgh Plate Glass Co filed Critical Pittsburgh Plate Glass Co
Publication of GB1124468A publication Critical patent/GB1124468A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B18/00—Shaping glass in contact with the surface of a liquid
    • C03B18/02—Forming sheets
    • C03B18/16—Construction of the float tank; Use of material for the float tank; Coating or protection of the tank wall

Landscapes

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

Abstract

To prevent defects, such as gas bubbles, on the underside of glass ribbon made by the float process, the molten metal 112 is contained in a tank 111 with refractory parts 126, 128 and a positive fluid differential pressure is established <PICT:1124468/C1/1> between at least some parts of the interior and exterior of the refractories. A subatmospheric pressure is preferably established below the refractory bricks 126 only over the hottest zones of the molten metal. As shown, the clay bricks 126 are secured by a clay cement 130 and conduits 131 pass through the tank bottom and are connected to a vacuum pump 134. In an alternative construction, holes in the tank bottom are covered by an outer shell which is connected to a vacuum pump.
GB54252/65A 1964-12-23 1965-12-22 Production of glass sheet Expired GB1124468A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US42061664A 1964-12-23 1964-12-23
US43067965A 1965-02-05 1965-02-05

Publications (1)

Publication Number Publication Date
GB1124468A true GB1124468A (en) 1968-08-21

Family

ID=27024936

Family Applications (1)

Application Number Title Priority Date Filing Date
GB54252/65A Expired GB1124468A (en) 1964-12-23 1965-12-22 Production of glass sheet

Country Status (5)

Country Link
BE (1) BE674197A (en)
DE (1) DE1496018A1 (en)
FR (1) FR1454699A (en)
GB (1) GB1124468A (en)
NL (1) NL6515659A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008041661A1 (en) * 2008-08-28 2010-03-04 Schott Ag Method for the production of flat glass in a float bath apparatus, comprises melting glass in a melting end, pouring the glass melt on a fluid metal bath and then forming to a glass strip, where the apparatus comprises a float bath base
CN102390919A (en) * 2011-08-15 2012-03-28 信义节能玻璃（芜湖）有限公司 Method for eliminating air bubbles at bottom of tin bath and tin bath bottom vacuum pumping system
CN105668996A (en) * 2016-01-08 2016-06-15 安徽华光光电材料科技集团有限公司 Tank bottom vacuum pumping device of total oxygen float glass molding production line

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008041661A1 (en) * 2008-08-28 2010-03-04 Schott Ag Method for the production of flat glass in a float bath apparatus, comprises melting glass in a melting end, pouring the glass melt on a fluid metal bath and then forming to a glass strip, where the apparatus comprises a float bath base
DE102008041661B4 (en) * 2008-08-28 2011-12-08 Schott Ag Process for the production of flat glass and float bath apparatus
CN102390919A (en) * 2011-08-15 2012-03-28 信义节能玻璃（芜湖）有限公司 Method for eliminating air bubbles at bottom of tin bath and tin bath bottom vacuum pumping system
CN105668996A (en) * 2016-01-08 2016-06-15 安徽华光光电材料科技集团有限公司 Tank bottom vacuum pumping device of total oxygen float glass molding production line

Also Published As

Publication number Publication date
FR1454699A (en) 1966-02-11
BE674197A (en) 1966-06-22
NL6515659A (en) 1966-06-24
DE1496018A1 (en) 1969-02-27

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