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WO2004024642A1 - Procede convectif permettant de chauffer des feuilles de verre a l'aide d'air comprime associe a l'air du four chauffe - Google Patents

Procede convectif permettant de chauffer des feuilles de verre a l'aide d'air comprime associe a l'air du four chauffe Download PDF

Info

Publication number
WO2004024642A1
WO2004024642A1 PCT/FI2003/000673 FI0300673W WO2004024642A1 WO 2004024642 A1 WO2004024642 A1 WO 2004024642A1 FI 0300673 W FI0300673 W FI 0300673W WO 2004024642 A1 WO2004024642 A1 WO 2004024642A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
oven
compressed air
pipes
nozzle
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.)
Ceased
Application number
PCT/FI2003/000673
Other languages
English (en)
Inventor
Clifford V. Matukonis
Anthony J. Narducci
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.)
Tamglass Oy
Original Assignee
Tamglass Oy
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 Tamglass Oy filed Critical Tamglass Oy
Priority to AU2003262598A priority Critical patent/AU2003262598A1/en
Priority to EP03795038A priority patent/EP1551775A1/fr
Publication of WO2004024642A1 publication Critical patent/WO2004024642A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B29/00—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins
    • C03B29/04—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins in a continuous way
    • C03B29/06—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins in a continuous way with horizontal displacement of the products
    • C03B29/08—Glass sheets

Definitions

  • the present invention relates to a semi-connective forced air system and method for heating glass sheets for subsequent processing. More particularly, the system and method of the present invention are used for heating low emissivity coated glass sheets (low "e" glass) before tempering and then tempering the glass sheets.
  • the invention includes new and improved nozzles for delivering a hot mixture of compressed air and heated oven air to a sheet of glass inside an oven.
  • the glass sheet If the air is kept on too long, the glass sheet exits the oven too cold and breaks.
  • the glass sheet needs to attain the final process temperature of about 634 °C via infrared radiation. This is the slowest form of heat transfer for low "e” glass sheets and it adds extra time to the heating cycle.
  • Fig. 1 is a view in side elevation of a compressed air assembly pipe with nozzles inserted therein and with hangers adapted for hanging the pipe from the ceiling of an oven.
  • Fig. 2 is a view in bottom plan of Fig. 1.
  • Fig. 3 is a view in elevation of a compressed air infeed pipe of Fig. 1.
  • Fig. 4 is an enlarged view in detail of the area marked 4 in Fig. 3.
  • Fig. 5 is an enlarged view in side elevation of a portion of the pipe and nozzles shown in Fig. 1.
  • Fig. 5a is an end view of Fig. 5 looking from the left of Fig. 5.
  • Fig. 5b is a view in top plan of one of the nozzles of Fig. 5.
  • Fig. 6 is a view in bottom plan of Fig. 5.
  • Fig. 7 is a view in rear elevation of a nozzle of Fig. 5.
  • Fig. 8 is a view in front elevation of the nozzle of Fig. 7.
  • Fig. 9 is a view in side elevation of the rollers, pipes, nozzles, clamps, hangers, and compressed air infeed pipes inside an oven.
  • Fig. 10 is a view in top plan of the pipes and nozzles in the oven.
  • Fig. 11 is a view showing the layout of the aspiration system including air tank, compressed air infeed pipes, distribution pipes and nozzles.
  • Fig. 12a shows a view in side elevation of a pipe flange.
  • Fig. 12b shows a view in elevation of a face of the flange of Fig. 12a looking from the left of Fig. 12a.
  • Fig. 12c shows a view in elevation of the other face of the flange looking from the right of Fig. 12a.
  • Fig. 7 shows a view in rear elevation of a nozzle 21
  • Fig. 8 shows a view in front elevation of the nozzle 21.
  • Compressed air goes into nozzle 21 through hole 23 and oven air is pulled into the nozzle through upper port 25 and the compressed and the oven air are mixed in mixing chamber 26 in the lower park of the nozzle 21 to form a hot air mix.
  • the mix of compressed air and oven air is discharged through lower port 27 onto glass sheets S to heat them for further procedures, like tempering.
  • Hole 23 is an angled hole that has been optimized at 30° for ease of machining, but it can be other angles.
  • the hole diameter is .080 mm, so particles which form inside the compressed air delivery system can blow through these holes.
  • the hole diameter can be changed if necessary or desired.
  • Upper port 25 is flared at inside flare 29 to allow for easier suction of oven air into this nozzle 21.
  • Lower port 27 is flared inwardly on the outside surface flare 30 of the nozzle 21.
  • Fig. 5 and the bottom view of Fig. 6 show the air amplification nozzles 21 pressed through a manifold or pipe 31 which delivers the compressed air to the nozzles 21.
  • Fig. 5b shows the orientation of the hole 23 in nozzle 21 to the manifold pipe 31.
  • the hole 23 is facing toward the opposite wall so that no particles can blow directly into this hole
  • Fig. 5 shows a side elevation view of the manifold pipe 31 with the nozzles 21 pressed through it.
  • Fig. 6 shows a bottom view of Fig. 5 of the manifold pipe 31 with the nozzles 21.
  • the number of nozzles 21 per manifold pipe 31 can vary to accommodate the length of the manifold pipe 31. Typically, the nozzles 21 are on 30 cm centers.
  • Figs. 1 and 2 show an assembly of the compressed air system with the compressed air being fed into the center of pipe 35 between sub-pipes 35a and 35b through the compressed air infeed pipe 33.
  • the compressed air comes into the oven 43 through a compressed air infeed distribution pipe 33 and pipes 35a, 35b and by the time it passes through the oven 43 and reaches the nozzle 21 it is at about 426°C, whereupon it is mixed with the hotter oven air which is at about 676°C to 704°C into a mix that is delivered by the nozzles 21 to the glass sheet S at about 690°C.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

Cette invention concerne un système d'air pulsé semi-convectif servant à chauffer des feuilles de verre. Ce système comprend : une chambre de chauffage située dans un four ; un transporteur longitudinal traversant la chambre de chauffage ; une source d'air comprimé ; une pluralité de tuyaux d'air comprimé s'étendant longitudinalement dans la chambre, chacun de ces tuyaux étant d'une part en communication fluidique avec la source d'air comprimé et d'autre part orientés parallèlement à la longueur du transporteur longitudinal, lesquels tuyaux comprennent par ailleurs une série de buses espacées les unes des autres et montées sur lesdits tuyaux ; un tuyau de distribution en communication fluidique avec la source d'air et lesdits tuyaux, chacune de ces buses comportant un orifice supérieur servant à recevoir l'air du four chauffé, une ouverture latérale servant à recevoir l'air comprimé, une chambre de mélange servant à mélanger l'air comprimé avec l'air du four afin qu'un mélange chaud soit obtenu, ainsi qu'un orifice inférieur servant à libérer le mélange sur les feuilles dans la chambre du four.
PCT/FI2003/000673 2002-09-16 2003-09-16 Procede convectif permettant de chauffer des feuilles de verre a l'aide d'air comprime associe a l'air du four chauffe Ceased WO2004024642A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003262598A AU2003262598A1 (en) 2002-09-16 2003-09-16 Convective method of heating glass sheets using compressed air in conjunction with heated oven air
EP03795038A EP1551775A1 (fr) 2002-09-16 2003-09-16 Procede convectif permettant de chauffer des feuilles de verre a l'aide d'air comprime associe a l'air du four chauffe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24479502A 2002-09-16 2002-09-16
US10/244,795 2002-09-16

Publications (1)

Publication Number Publication Date
WO2004024642A1 true WO2004024642A1 (fr) 2004-03-25

Family

ID=31991967

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2003/000673 Ceased WO2004024642A1 (fr) 2002-09-16 2003-09-16 Procede convectif permettant de chauffer des feuilles de verre a l'aide d'air comprime associe a l'air du four chauffe

Country Status (5)

Country Link
EP (1) EP1551775A1 (fr)
CN (1) CN1330595C (fr)
AU (1) AU2003262598A1 (fr)
RU (1) RU2287493C2 (fr)
WO (1) WO2004024642A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8322162B2 (en) 2004-04-07 2012-12-04 Glaston Services Ltd. Oy Method of heating glass panels for tempering and apparatus applying the method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5951734A (en) * 1997-08-15 1999-09-14 Tgl Tempering Systems, Inc. Semi-convective forced air system for tempering low E coated glass
EP1279645A2 (fr) * 2001-07-27 2003-01-29 Tamglass Ltd. Oy Procédé et appareil pour réchauffer des feuilles de verre par moyen d'air forcé semi-convectif

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018590A (en) * 1976-03-26 1977-04-19 Ppg Industries, Inc. Fluid spraying apparatus for tempering glass sheets
US4505671A (en) * 1981-02-17 1985-03-19 Glasstech, Inc. Glass sheet roller conveyor furnace including gas jet pump heating
RU2095323C1 (ru) * 1995-02-22 1997-11-10 Белгородская государственная технологическая академия строительных материалов Способ нагрева стекла при закалке

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5951734A (en) * 1997-08-15 1999-09-14 Tgl Tempering Systems, Inc. Semi-convective forced air system for tempering low E coated glass
EP1279645A2 (fr) * 2001-07-27 2003-01-29 Tamglass Ltd. Oy Procédé et appareil pour réchauffer des feuilles de verre par moyen d'air forcé semi-convectif

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8322162B2 (en) 2004-04-07 2012-12-04 Glaston Services Ltd. Oy Method of heating glass panels for tempering and apparatus applying the method

Also Published As

Publication number Publication date
CN1678539A (zh) 2005-10-05
CN1330595C (zh) 2007-08-08
RU2005111221A (ru) 2005-09-10
RU2287493C2 (ru) 2006-11-20
EP1551775A1 (fr) 2005-07-13
AU2003262598A1 (en) 2004-04-30

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