WO2007107791A1 - Appareil de trempe - Google Patents

Appareil de trempe Download PDF

Info

Publication number
WO2007107791A1
WO2007107791A1 PCT/GB2007/050134 GB2007050134W WO2007107791A1 WO 2007107791 A1 WO2007107791 A1 WO 2007107791A1 GB 2007050134 W GB2007050134 W GB 2007050134W WO 2007107791 A1 WO2007107791 A1 WO 2007107791A1
Authority
WO
WIPO (PCT)
Prior art keywords
tempering apparatus
tempering
tempered
furnace
blower
Prior art date
Application number
PCT/GB2007/050134
Other languages
English (en)
Inventor
John Paterson
Original Assignee
Westcrowns Contracting Services Limited
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 Westcrowns Contracting Services Limited filed Critical Westcrowns Contracting Services Limited
Publication of WO2007107791A1 publication Critical patent/WO2007107791A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating devices
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/02—Tempering or quenching glass products using liquid
    • C03B27/028—Tempering or quenching glass products using liquid the liquid being water-based
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/04—Tempering or quenching glass products using gas
    • C03B27/0404—Nozzles, blow heads, blowing units or their arrangements, specially adapted for flat or bent glass sheets
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/04—Tempering or quenching glass products using gas
    • C03B27/044—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position
    • C03B27/0442—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position for bent glass sheets
    • C03B27/0445—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position for bent glass sheets the quench unit being adapted to the bend of the sheet
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/04—Tempering or quenching glass products using gas
    • C03B27/044—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position
    • C03B27/0442—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position for bent glass sheets
    • C03B27/0447—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position for bent glass sheets the quench unit being variably adaptable to the bend of the sheet
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/14—Arrangements of heating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/02—Ohmic resistance heating

Definitions

  • the present invention relates to a tempering apparatus, in particular for glass.
  • a tempering apparatus comprises means for heating an object to a set temperature and means for the rapid cooling of the object. This process is used to strengthen the object, and is commonly used for the strengthening of metal and glass materials.
  • a “profiled" glass structure in this context is taken to mean any glass structure having a non- planar shape.
  • One particular example is a u-shaped channel glass structure, of the type used for the formation in walls or partitions (either internal or external) in buildings or similar fixed constructions .
  • a tempering apparatus comprising a main furnace provided with a plurality of height-adjustable heating elements .
  • heating elements of differing widths are provided, to be matched with a predetermined shape profile of an object to be tempered.
  • each heating element is provided within a housing member, which comprises means for adjusting its vertical position within the main furnace.
  • said vertical position adjustment means comprises a screw-thread adjustable shaft.
  • the housing further comprises one or more guide rods for constraining motion of the housing transversely to the vertical.
  • the heating elements are arranged to create a temperature gradient within the main furnace .
  • the heating elements are arranged in a specific configuration to ensure even heat distribution over a specific predetermined shape of object.
  • the heating elements are provided to heat an upper and a lower surface of an object to be tempered.
  • the tempering apparatus further comprises a pre-heating furnace arranged to heat an object to be tempered prior to its entry to the main furnace.
  • the tempering apparatus further comprises a cooling chamber provided with a plurality of nozzles which are adjustable to fit with the contours of a predetermined shape of an object to be tempered.
  • the nozzles are arranged to spray a coolant, most preferably water or air.
  • the nozzles are provided to act on both a top and bottom surface of an object to be tempered.
  • a blower is provided at the cooling chamber for supplying air to the object to be tempered.
  • the blower is of a centrifugal type.
  • the blower is controlled through an inverter.
  • the blower is powered by a compressed air system.
  • the blower comprises at least one of: air ducts, flashboards, distribution boxes and guench nozzles.
  • the tempering apparatus comprises a roller system for guiding an object from the pre- heating furnace to the main furnace and then to the cooling section.
  • the roller system is further arranged to guide an object from a loading table to the pre- heating furnace and from the cooling section to an unloading table.
  • the roller system comprises a plurality of rollers arranged to position an object to be tempered at a specific position within one or more component parts of the tempering apparatus.
  • the operation of the tempering apparatus is controlled with a programmable logic controller (PLC) device.
  • PLC programmable logic controller
  • the PLC device incorporates a real-time surveillance function.
  • the tempering apparatus is for glass tempering.
  • Fig.l shows an orthographic view of a furnace according to a first embodiment
  • Fig.2 shows a perspective view of the furnace of Fig. 1;
  • Fig.3 shows a perspective view of an air box and a centrifugal fan used with the furnace of Fig. 1;
  • Fig. 4 shows a perspective view of an adjustable heating element for use with the furnace of Fig. 1;
  • Fig. 5 shows side and plan views of the heating element of Fig. 4.
  • FIG. 1 A tempering apparatus according to a first embodiment of the invention is shown in Fig. 1.
  • the following description will be with reference to a furnace which is specifically designed for tempering a profiled glass structure, but it should be borne in mind throughout the reading of the following description that the principles of the present invention could be applied for the tempering of other materials, such as metals.
  • an object to be tempered in this example a profiled glass structure, is moved through the tempering apparatus by a roller system 11, in a direction going from left to right as viewed in Figs. Ia and Ib.
  • the glass structure is placed on a loading table 1 before being passed into a pre-heating furnace 2, then the main furnace 3, followed by a cooling chamber 4, before being passed to an unloading table for subseguent processing.
  • a side view of these components is shown in Fig. Ia, a plan view in Fig. Ib, and an end view in Fig. Ic.
  • the loading table 1 and unloading table 6 comprise powered rollers and a photoelectric sensor and encoder which interacts with the control system described later.
  • the rollers for the loading table 1 and unloading table 6 can be made from heatproof NBR rubber, or any other suitable heat resistant material.
  • the roller drive system for the tables 1,6 can be powered through a controlled motor.
  • the pre-heating furnace 2 is used to pre-heat the profiled glass to avoid any possible breakage from thermal shock, which would be likely to occur if the glass was sent straight into the main furnace 3.
  • the pre-heating furnace 2 incorporates a cullet drawer for ease of maintenance.
  • the main furnace 3 is provided with heating elements 17 (see Figs. 4 and 5) that are individually height adjustable to fit the glass shape. This gives a better heating profile to the profiled glass, as is illustrated in more detail in Figs. 4 and 5.
  • a profiled glass structure 15 is passed along rollers 13, forming a sub-section of the roller system 11.
  • Heating elements 17 are positioned to apply heat to the structure 15 as it passes through the main furnace 3.
  • the heating elements 17 are housed in housing members 14, which are height-adjustable by virtue of the screw-thread mechanism 10.
  • the vertical motion of the housing with respect to the furnace body (not shown) is constrained by guide rods 16.
  • Fig. 5 shows some views which give more detail of the structures shown in Fig. 4.
  • Fig. 5a shows a side view of the housing members 14, and
  • Fig. 5b shows an end view of the housing members 14, while
  • Fig. 5c shows an underside view of a heating element 17 within its housing 14.
  • the screw thread element 10 is rotated until the housing 14 is raised or lowered to a desired position.
  • the rotation is achieved through an actuator (not shown), which can be either manually controlled (for example by turning a handle provided integrally with the screw thread member 10) or electronically controlled (for example by employing a servo mechanism whose operation can be controlled by an electronic command signal) .
  • Fig. 4 is for illustration only, and only shows two heating elements 17 arranged to heat a single u- shaped glass structure 15. It will be readily appreciated that the heating elements 17 could be provided in differing numbers, sizes and positions.
  • the size of the main furnace 3 is arbitrary, and it could be designed for the processing of a large number of structures 15 at any time.
  • the widths of the heating elements may be varied according to the shape of the structure to be tempered.
  • the lower (as illustrated) heating element 17 could be of a width less than that of the channel, and the channel could be positioned centrally above the heating element, so that heat is evenly distributed across the profile of the channel.
  • Fig. 4 illustrates heating elements 17 being provided to heat both a top and a bottom surface of a structure 15, it will be appreciated that the structure could be heated from only one of the top or bottom, or additionally or alternatively from one or more sides .
  • heating elements 17 can be chosen and adjusted to match a specific profile of structure 15 which is to be tempered.
  • the main furnace 3 can advantageously arranged to provide a temperature gradient across the furnace, creating different heating zones, raising the temperature of the glass to approximately 700 degrees centigrade. As an example, there can be up to 24 heating zones, both top and bottom.
  • the main furnace 3 also incorporates a cullet drawer for ease of maintenance.
  • a cooling chamber 4 which comprises a plurality of guench nozzles designed to fit into the contours of the profiled glass, using a coolant such as water or air to rapidly reduce the glass temperature. They can be adjustable to fit any desired shape of object that is being tempered.
  • the guench nozzles are made from stainless steel or another suitable heat corrosion resistant material, and can be provided to apply coolant to either or both of the top and bottom surfaces of the profiled glass .
  • the cooling chamber is further enhanced with an air supply from a blower 8, illustrated in Fig. 3, which acts once the profiled glass has been guenched by the water nozzles as mentioned above.
  • This aspect is used to cool the glass and reduce the temperature to that of the ambient surroundings, helping in the supply of an even coating of air to the profiled glass 12,15.
  • the blower can be of a centrifugal type, and can be controlled through an inverter or a compressed air system.
  • the blower 8 comprises at least one of: air ducts, flashboards, distribution boxes and guench nozzles, which are formed from steel. It is provided as part of incorporates a pneumatic air station, which includes an air tank, air pressure adjust valve, and air tubes distribution system.
  • the glass structure, or other object to be tempered is guided through the tempering apparatus by a roller system 11.
  • This comprises sub-components of rollers for each of the loading tray 1, pre-heating furnace 2, main furnace 3, cooling chamber 4 and unloading tray 6.
  • the roller system 11 is specifically designed to correctly position the glass within the main furnace for even heat distribution.
  • the glass positioning rollers can be formed from ceramic or another suitable heat resistant material, and can be used for the positioning of one or more panels of glass.
  • the overall operation of the tempering apparatus can be controlled by a PLC control system 7. This controls the inputs for and receives feedback from the loading and unloading tables 1,6 and can be used to control the positioning of the heating elements 17 within the main furnace 3. It can also be used to incorporate a real-time surveillance mode.
  • the tempering apparatus can be provided with insulation of sufficient guality to ensure the outside temperature is bellow 45 centigrade. It can also be provided with an auto pre-heat start up function, heating the furnace for the day's shift.
  • an emergency glass removal system can be incorporated to relieve the operator of manually removing the glass.

Landscapes

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

Abstract

La présente invention concerne un four destiné à la trempe du verre qui a été développé spécialement pour tremper du verre profilé. Le four a été conçu pour résoudre le problème du choc thermique. Ceci a été résolu par chauffage progressif du verre profilé. La conception de buses réglables permet de refroidir le verre de manière homogène et donc de le tremper.
PCT/GB2007/050134 2006-03-20 2007-03-20 Appareil de trempe WO2007107791A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0605541.2 2006-03-20
GB0605541A GB0605541D0 (en) 2006-03-20 2006-03-20 Tempering Apparatus

Publications (1)

Publication Number Publication Date
WO2007107791A1 true WO2007107791A1 (fr) 2007-09-27

Family

ID=36293081

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2007/050134 WO2007107791A1 (fr) 2006-03-20 2007-03-20 Appareil de trempe

Country Status (2)

Country Link
GB (1) GB0605541D0 (fr)
WO (1) WO2007107791A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102674671A (zh) * 2012-04-28 2012-09-19 佛山市索奥斯玻璃技术有限公司 一种轨道式多工位化学钢化炉
CN103274586A (zh) * 2013-06-27 2013-09-04 长治市晟龙实业有限公司 玻璃钢化炉
EP2647604A4 (fr) * 2010-11-29 2015-06-24 Asahi Glass Co Ltd Dispositif et procédé de fabrication de verre flotté en feuille

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1596499A1 (de) * 1965-09-29 1971-03-04 Bernard Long U-querschnittfoermiges Glasprofilstueck und Abschreckverfahren zu dessen Herstellung
US4071346A (en) * 1975-11-19 1978-01-31 Saint-Gobain Industries Apparatus for thermal tempering sheets of glass
US5122180A (en) * 1990-02-21 1992-06-16 Saint-Gobain Vitrage International Furnace for heating glass sheets
US5173102A (en) * 1990-02-21 1992-12-22 Saint-Gobain Vitrage International Apparatus for curving glass sheets
US6035666A (en) * 1998-10-21 2000-03-14 Glasstech, Inc. Apparatus for roll forming glass sheets
WO2001023310A1 (fr) * 1999-09-27 2001-04-05 Asahi Glass Company, Limited Procede et dispositif de cintrage des vitres
US20040107729A1 (en) * 2002-03-13 2004-06-10 Asahi Glass Company Limited Method and apparatus for bending a glass sheet
WO2004074194A1 (fr) * 2003-02-21 2004-09-02 Tamglass Ltd. Oy Procede et appareil pour plier et tremper ou tremper thermiquement un panneau de verre a courbure bidirectionnelle
EP1623961A1 (fr) * 2003-05-09 2006-02-08 Asahi Glass Company Ltd. Procede de chauffage de plaques vitrees et four de rechauffage

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1596499A1 (de) * 1965-09-29 1971-03-04 Bernard Long U-querschnittfoermiges Glasprofilstueck und Abschreckverfahren zu dessen Herstellung
US4071346A (en) * 1975-11-19 1978-01-31 Saint-Gobain Industries Apparatus for thermal tempering sheets of glass
US5122180A (en) * 1990-02-21 1992-06-16 Saint-Gobain Vitrage International Furnace for heating glass sheets
US5173102A (en) * 1990-02-21 1992-12-22 Saint-Gobain Vitrage International Apparatus for curving glass sheets
US6035666A (en) * 1998-10-21 2000-03-14 Glasstech, Inc. Apparatus for roll forming glass sheets
WO2001023310A1 (fr) * 1999-09-27 2001-04-05 Asahi Glass Company, Limited Procede et dispositif de cintrage des vitres
US20040107729A1 (en) * 2002-03-13 2004-06-10 Asahi Glass Company Limited Method and apparatus for bending a glass sheet
WO2004074194A1 (fr) * 2003-02-21 2004-09-02 Tamglass Ltd. Oy Procede et appareil pour plier et tremper ou tremper thermiquement un panneau de verre a courbure bidirectionnelle
EP1623961A1 (fr) * 2003-05-09 2006-02-08 Asahi Glass Company Ltd. Procede de chauffage de plaques vitrees et four de rechauffage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2647604A4 (fr) * 2010-11-29 2015-06-24 Asahi Glass Co Ltd Dispositif et procédé de fabrication de verre flotté en feuille
CN102674671A (zh) * 2012-04-28 2012-09-19 佛山市索奥斯玻璃技术有限公司 一种轨道式多工位化学钢化炉
CN102674671B (zh) * 2012-04-28 2014-06-04 佛山市索奥斯玻璃技术有限公司 一种轨道式多工位化学钢化炉
CN103274586A (zh) * 2013-06-27 2013-09-04 长治市晟龙实业有限公司 玻璃钢化炉
CN103274586B (zh) * 2013-06-27 2016-01-20 长治市晟龙实业有限公司 玻璃钢化炉

Also Published As

Publication number Publication date
GB0605541D0 (en) 2006-04-26

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