WO2009004111A1 - A method for bending and tempering a glass - Google Patents
A method for bending and tempering a glass Download PDFInfo
- Publication number
- WO2009004111A1 WO2009004111A1 PCT/FI2008/000081 FI2008000081W WO2009004111A1 WO 2009004111 A1 WO2009004111 A1 WO 2009004111A1 FI 2008000081 W FI2008000081 W FI 2008000081W WO 2009004111 A1 WO2009004111 A1 WO 2009004111A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- glass
- tempering
- cooling section
- furnace
- cooling
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/20—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by gripping tongs or supporting frames
- C03B35/202—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by gripping tongs or supporting frames by supporting frames
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/025—Re-forming glass sheets by bending by gravity
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/025—Re-forming glass sheets by bending by gravity
- C03B23/0252—Re-forming glass sheets by bending by gravity by gravity only, e.g. sagging
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
- C03B25/02—Annealing glass products in a discontinuous way
- C03B25/025—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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/145—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by top-side transfer or supporting devices, e.g. lifting or conveying using suction
Definitions
- One of the oldest known bending and tempering methods of glass is to perform the whole process in such a way that heating, bending, tempering and cooling of glass are performed with one edge mould throughout the process.
- a so called single-chamber furnace there is a combined tempering and cooling section in the middle of the loading area of glass and the heating furnace.
- the glass is loaded to the edge mould and it is thus unloaded from the mould at the same location. After loading the glass it is transferred to the furnace through the tempering and cooling section.
- the glass is transferred to the unloading/loading section, it is unloaded from the mould/moulds and new, flat glass is set to the mould/moulds. At this stage it enters a new cycle.
- the advantage of the above mentioned furnace type is the fact that it is simple to operate, economical to manufacture and one operator can handle the operating of the whole furnace because the loading and unloading of the furnace occur in the same location. It is also easy to see into the furnace so that the processing parameters of the new glass are easier to determine and start up its production quickly.
- the disadvantage of the furnace is its low production capacity which is caused by two reasons;
- the aim of the method according to this invention is to reduce the idle time mentioned in section 2) during which the furnace is empty and no glass is heated. It is characteristic of the method according to the invention that after tempering the glass which is performed immediately in the tempering/cooling section the next amount of glass to be loaded is transferred to the furnace to be heated, cooling of the glass which was just tempered continues in the tempering/cooling section and it is removed from the tempering/cooling section before the glass load which exists in the furnace is transferred to the tempering/cooling section.
- Figure 1 shows a heating furnace, a tempering/cooling section and a loading/unloading point as a side view in which the bent glass is being tempered.
- Figure 2 shows the equipment of figure 1 as a side view whereupon the glass is being cooled and the next amount of glass is being loaded.
- Figure 3 shows a situation in which the glass is being heated and the bent and tempered glass is being cooled.
- Figure 4 shows a situation in which the glass has been bent in the furnace and the ready- made, processed glass can be removed at the unloading point.
- the glass which has been bent in the furnace 1 with the help of the edge mould R (glass load) Gb is transferred from the furnace 1 to the tempering section 2 in which it is tempered with the edge mould R for about 4 - 6 seconds depending on the thickness of the glass.
- the glass is contained by the edge mould during the tempering.
- a new, flat load of glass Gf is loaded manually or it already waits to be loaded to the edge mould R at the right place being supported by for example a vacuum pressure lifter L.
- the unloading device U of glass is at a waiting position.
- the glass When the glass has been tempered, it is lifted up from the edge mould R either by blowing it upwards against the upper nozzle sections which are equipped for example with cushions or against counterparts or for example with the help of the upper suction lifters. Supporting of the glass can be performed also with the help of vacuum pressure which is directed to the upper nozzle sections. If such unloading device U of glass is used which can be brought under the glass even before a new glass load is transferred to the furnace, the glass can be supported by blowing it against the upper nozzle sections or the counterparts till it is allowed to drop to the unloading device which is brought underneath it. This kind of method leads in practise to a usage of an unloading device U which would be operated at a different elevation than the edge mould R.
- the unloading device U can for example be a net-like conveyor.
- loading of the flat glass to the edge mould can alternatively be performed also inside the tempering section.
- the loading device L and the unloading device U would most naturally be a combination device in which the glass load would be taken into a tempering section for example with the help of vacuum pressure lifters which are located to extensions and would be dropped to the right location on the edge mould and a support arrangement would be located to the same extensions to which support arrangement the glass which is waiting to be cooled would be dropped.
- Fig. 3 The glass is transferred through a combined tempering and cooling section most advantageously under the glass which exists there to be warmed in the furnace.
- the unloading device of the glass which has a suitable, for example a net-like base, is brought under the glass which waits to be cooled to which base the glass is dropped and the cooling of the glass begins with the help of air showers which are located above and under the glass.
- vacuum pressure which is produced for example at the suction side of the tempering/cooling blower, can be utilized by directing the vacuum pressure (suction) to the upper nozzle sections.
- vacuum pressure suction
- counterparts are to be arranged to the upper nozzle sections in order to protect the nozzles and in order to prevent the damaging of the glass towards which counterparts the glass is blown if blowing from underneath is used in order to lift the glass from the edge mould.
- the supporting power of the tubular nozzles may be too weak in which case there is a reason for moulding the counterparts especially in order to increase underinflated supporting surface area so that sufficient supporting power of the glass could be ensured.
- an unloading device is for example to utilize the drive mechanism of the edge mould whereupon the conveyance shuttle for the edge mould would pull the unloading device after it to the tempering/cooling section while a new glass load is being taken to the furnace. In the tempering/cooling section it would be locked in its place till the glass is cooled. After the cooling a mechanical long spring, a counter weight or another arrangement would pull the unloading device to an unloading position.
- the drive mechanism of the edge mould whereupon the conveyance shuttle for the edge mould would pull the unloading device after it to the tempering/cooling section while a new glass load is being taken to the furnace. In the tempering/cooling section it would be locked in its place till the glass is cooled. After the cooling a mechanical long spring, a counter weight or another arrangement would pull the unloading device to an unloading position.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
Bending and tempering method of glass in which the glass is heated in a single-chamber heating furnace (1), is bent and tempered while being located in an edge mould (R) which mould is moved between the heating furnace (1), a tempering/cooling section (2) and a loading/unloading area and in which method the tempering/cooling section (2) is located between the loading/unloading area and the furnace (1). Immediately after the tempering of glass which has been performed in the tempering/cooling section (2) the next glass load is transferred to the furnace (1) to be heated and the cooling of glass which has just been tempered continues in the tempering/cooling section (2) and the glass is removed from the tempering/cooling section (2) before transferring the glass load which is located in the heating furnace (1) to the tempering/cooling section (2).
Description
A Method for Bending and Tempering A Glass
Known techniques
One of the oldest known bending and tempering methods of glass is to perform the whole process in such a way that heating, bending, tempering and cooling of glass are performed with one edge mould throughout the process. When a so called single-chamber furnace is used, there is a combined tempering and cooling section in the middle of the loading area of glass and the heating furnace. The glass is loaded to the edge mould and it is thus unloaded from the mould at the same location. After loading the glass it is transferred to the furnace through the tempering and cooling section. After heating and bending, after the glass has been heated to the tempering temperature, it is taken quickly to the tempering area where it also becomes cooled to the unloading temperature. After that the glass is transferred to the unloading/loading section, it is unloaded from the mould/moulds and new, flat glass is set to the mould/moulds. At this stage it enters a new cycle.
The advantage of the above mentioned furnace type is the fact that it is simple to operate, economical to manufacture and one operator can handle the operating of the whole furnace because the loading and unloading of the furnace occur in the same location. It is also easy to see into the furnace so that the processing parameters of the new glass are easier to determine and start up its production quickly. The disadvantage of the furnace is its low production capacity which is caused by two reasons;
1) the fact that there is only one load of glass being heated in the furnace at a time and 2) the fact that while the glass is being tempered, cooled and unloaded, the furnace is empty and no glass is being heated which directly reduces the capacity.
Technique according to the invention:
The aim of the method according to this invention is to reduce the idle time mentioned in section 2) during which the furnace is empty and no glass is heated. It is characteristic of the method according to the invention that after tempering the glass which is performed immediately in the tempering/cooling section the next amount of glass to be loaded is transferred to the furnace to be heated, cooling of the glass which was just tempered
continues in the tempering/cooling section and it is removed from the tempering/cooling section before the glass load which exists in the furnace is transferred to the tempering/cooling section.
With the method according to the invention time saving is achieved in such a way that the next load of glass can be transferred to the furnace to be heated immediately after the quick tempering of the previous glass to be loaded has finished. The cooling of the tempered glass and its unloading operations from the furnace can thus be performed simultaneously while the next load is getting heated up and is being bent in the furnace. With the help of the method an increase in capacity which is considerably more than 30 percent can be achieved with the above mentioned furnace.
Other methods for increasing the capacity are for example placement tables and loading devices of the glass with the help of which the arrangement of the glass can be performed while the glass is being heated, bent and cooled. For example use of a loading device is an ergonomically good thing and it makes the operating easier when no glass needs to be loaded manually to a hot mould. In addition to the increase in capacity the method has an energy saving effect because during quick tempering mould structures and their supports do not cool down so much as in the previous methods in which the glass got cooled down before it got removed with the edge mould.
The advantages of the method according the invention, especially the increase in capacity can be achieved when one acts according to the following steps which are illustrated by the following drawings in which
Figure 1 shows a heating furnace, a tempering/cooling section and a loading/unloading point as a side view in which the bent glass is being tempered. Figure 2 shows the equipment of figure 1 as a side view whereupon the glass is being cooled and the next amount of glass is being loaded. Figure 3 shows a situation in which the glass is being heated and the bent and tempered glass is being cooled.
Figure 4 shows a situation in which the glass has been bent in the furnace and the ready- made, processed glass can be removed at the unloading point.
Fig. 1.
The glass which has been bent in the furnace 1 with the help of the edge mould R (glass load) Gb is transferred from the furnace 1 to the tempering section 2 in which it is tempered with the edge mould R for about 4 - 6 seconds depending on the thickness of the glass. The glass is contained by the edge mould during the tempering. A new, flat load of glass Gf is loaded manually or it already waits to be loaded to the edge mould R at the right place being supported by for example a vacuum pressure lifter L. The unloading device U of glass is at a waiting position.
Fig. 2
When the glass has been tempered, it is lifted up from the edge mould R either by blowing it upwards against the upper nozzle sections which are equipped for example with cushions or against counterparts or for example with the help of the upper suction lifters. Supporting of the glass can be performed also with the help of vacuum pressure which is directed to the upper nozzle sections. If such unloading device U of glass is used which can be brought under the glass even before a new glass load is transferred to the furnace, the glass can be supported by blowing it against the upper nozzle sections or the counterparts till it is allowed to drop to the unloading device which is brought underneath it. This kind of method leads in practise to a usage of an unloading device U which would be operated at a different elevation than the edge mould R. The unloading device U can for example be a net-like conveyor.
A solution is drawn in the figures in which the edge mould R and the unloading device U have the same elevation and then they use the same route in the best way. In that case the unloading device U is withdrawn to a small space which is at the loading point of the furnace for the performing time of a new loading of the glass. In both above mentioned methods only one moveable edge mould is needed.
In Fig. 2 loading of the flat glass to the edge mould can alternatively be performed also inside the tempering section. In that case the loading device L and the unloading device U would most naturally be a combination device in which the glass load would be taken into a tempering section for example with the help of vacuum pressure lifters which are located to extensions and would be dropped to the right location on the edge mould and a support
arrangement would be located to the same extensions to which support arrangement the glass which is waiting to be cooled would be dropped.
Fig. 3 The glass is transferred through a combined tempering and cooling section most advantageously under the glass which exists there to be warmed in the furnace. The unloading device of the glass which has a suitable, for example a net-like base, is brought under the glass which waits to be cooled to which base the glass is dropped and the cooling of the glass begins with the help of air showers which are located above and under the glass.
Fig. 4
The cooling base of the unloading device of the glass with its glass which has been tempered and bent is brought to the unloading area and the glass is unloaded away from the base. The next piece of glass Gfb bends in the furnace and gets heated up to the tempering temperature. A new cycle which is described above can begin according to the Figure 1.
In the implementation of the vacuum pressure support arrangement vacuum pressure, which is produced for example at the suction side of the tempering/cooling blower, can be utilized by directing the vacuum pressure (suction) to the upper nozzle sections. If technically advantageous pipe nozzles in the area of tempering are used in the tempering section, counterparts are to be arranged to the upper nozzle sections in order to protect the nozzles and in order to prevent the damaging of the glass towards which counterparts the glass is blown if blowing from underneath is used in order to lift the glass from the edge mould. The supporting power of the tubular nozzles may be too weak in which case there is a reason for moulding the counterparts especially in order to increase underinflated supporting surface area so that sufficient supporting power of the glass could be ensured.
One advantageous way to manufacture an unloading device is for example to utilize the drive mechanism of the edge mould whereupon the conveyance shuttle for the edge mould would pull the unloading device after it to the tempering/cooling section while a new glass load is being taken to the furnace. In the tempering/cooling section it would be locked in its place till the glass is cooled. After the cooling a mechanical long spring, a counter
weight or another arrangement would pull the unloading device to an unloading position. There are many technical alternatives for the implementation.
Claims
1. Bending and tempering method of glass in which the glass is heated in a single-chamber heating furnace (1), is bent and tempered while being located in an edge mould (R) which mould is moved between the heating furnace (1), a tempering/cooling section (2) and a loading/unloading area and in which method the tempering/cooling section (2) is located between the loading/unloading area and the furnace (1), characterized in that - immediately after the tempering of glass which has been performed in the tempering/ cooling section (2) the next glass load is transferred to the furnace (1) to be heated, - the cooling of glass which has just been tempered continues in the tempering/cooling section (2) and the glass is removed from the tempering/cooling section (2) before transferring the glass load which is located in the heating furnace (1) to the tempering/ cooling section (2).
2. Method according to the claim 1, characterized in that one moveable edge mould (R) is used in the method.
3. Method according to the claim 1, characterized in that tempered glass which still has not gone through the final cooling and the glass which is going to be heated bypass each other at different hight elevations.
4. Method according to any of the above claims 1 - 3, characterized in that the glass which is to be cooled is supported with vacuum pressure which is directed to the nozzle sections which are above the glass.
5. Method according to the claim 4, characterized in that vacuum pressure which is meant to support the glass is produced with the help of vacuum pressure of the suction side of the blower which belongs to the tempering/cooling section (2).
6. Method according to the claim 4 or 5, characterized in that a prevention system of the air flow is arranged to the upper nozzles, to the suction side of the blower which prevention system forms vacuum pressure near the upper nozzles or to the mentioned nozzles.
7. Method according to any of the above claims 1 - 6 characterized in that the transfer of the unloading device (U) at least from the unloading area to the tempering section is performed by connecting the unloading device to the transfer device of the edge mould (R) in order to achieve a transfer movement to the unloading device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20070515 | 2007-06-29 | ||
| FI20070515A FI120196B (en) | 2007-06-29 | 2007-06-29 | Method of bending hardening of glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009004111A1 true WO2009004111A1 (en) | 2009-01-08 |
Family
ID=38212366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FI2008/000081 Ceased WO2009004111A1 (en) | 2007-06-29 | 2008-06-27 | A method for bending and tempering a glass |
Country Status (2)
| Country | Link |
|---|---|
| FI (1) | FI120196B (en) |
| WO (1) | WO2009004111A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2487091C1 (en) * | 2011-12-21 | 2013-07-10 | Открытое акционерное общество "Обнинское научно-производственное предприятие "Технология" | Method of making bent glass articles |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5022908A (en) * | 1988-08-03 | 1991-06-11 | Nippon Sheet Glass Co., Ltd. | Apparatus for bending glass sheet |
| US5306324A (en) * | 1992-04-30 | 1994-04-26 | Tamglass Engineering Oy | Method and apparatus for bending and tempering a glass sheet |
-
2007
- 2007-06-29 FI FI20070515A patent/FI120196B/en active IP Right Grant
-
2008
- 2008-06-27 WO PCT/FI2008/000081 patent/WO2009004111A1/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5022908A (en) * | 1988-08-03 | 1991-06-11 | Nippon Sheet Glass Co., Ltd. | Apparatus for bending glass sheet |
| US5306324A (en) * | 1992-04-30 | 1994-04-26 | Tamglass Engineering Oy | Method and apparatus for bending and tempering a glass sheet |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2487091C1 (en) * | 2011-12-21 | 2013-07-10 | Открытое акционерное общество "Обнинское научно-производственное предприятие "Технология" | Method of making bent glass articles |
Also Published As
| Publication number | Publication date |
|---|---|
| FI20070515A0 (en) | 2007-06-29 |
| FI20070515L (en) | 2008-12-30 |
| FI120196B (en) | 2009-07-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11130698B2 (en) | Glass sheet forming and annealing system providing edge stress control | |
| JP5292577B2 (en) | Method and system for positioning a glass sheet for molding | |
| US8978418B2 (en) | Method and device for bending sheets | |
| JP5641254B2 (en) | Slow cooling method and apparatus for glass plate | |
| US9452662B2 (en) | Method and device for bending sheets | |
| US8387415B2 (en) | Method for bending a glass sheet and apparatus for bending a glass sheet | |
| JP6498354B2 (en) | Glass bending apparatus and glass bending method using blower | |
| CN101883739A (en) | Glass plate bending method and glass plate bending apparatus | |
| KR101329066B1 (en) | Glass sheet forming system and method | |
| KR20070094622A (en) | Devices including glass-bending and cooling methods and two pedestal trains | |
| JP2020508282A (en) | Glass pane with reduced tensile stress | |
| JP3185934B2 (en) | Sheet glass bending method | |
| CN108349771B (en) | Lifting devices for glass processing systems | |
| JPH06115960A (en) | Device and method for forming glass sheet | |
| KR20160124117A (en) | Forming station and method for forming a hot glass sheet with transverse curvature | |
| WO2009004111A1 (en) | A method for bending and tempering a glass | |
| JP4977661B2 (en) | How to take out the molded product | |
| JP5454205B2 (en) | Glass plate bending apparatus and method | |
| CN202643544U (en) | Glass tempering equipment | |
| KR20140118431A (en) | Method and apparatus for manufacturing a molded glass | |
| KR20210069099A (en) | Method and device for bending sheets | |
| JPS5919890B2 (en) | Glass plate processing equipment | |
| ES2895734T3 (en) | Method for bending glass sheets in an apparatus, and apparatus for bending glass sheets | |
| CN218486481U (en) | Automatic drying equipment | |
| CN216784880U (en) | Control device for delayed cracking of thermal forming product |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 08787680 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 08787680 Country of ref document: EP Kind code of ref document: A1 |