WO1995020546A1 - Vorrichtung zum thermischen vorspannen von glasscheiben bei hohem konvektivem wärmeübergang durch beblasen mit luft - Google Patents
Vorrichtung zum thermischen vorspannen von glasscheiben bei hohem konvektivem wärmeübergang durch beblasen mit luft Download PDFInfo
- Publication number
- WO1995020546A1 WO1995020546A1 PCT/EP1995/000298 EP9500298W WO9520546A1 WO 1995020546 A1 WO1995020546 A1 WO 1995020546A1 EP 9500298 W EP9500298 W EP 9500298W WO 9520546 A1 WO9520546 A1 WO 9520546A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nozzle
- transport
- caps
- lower nozzle
- gas jet
- Prior art date
Links
Classifications
-
- 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
- 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
Definitions
- the invention relates to a high-convection gas jet nozzle section, in particular for thermal tempering of sheet-like goods, such as glass panes guided over rollers of the type described in the preamble of claim 1.
- Devices of this type are used, for example, to cool a sheet-like good, such as a glass pane on its pane surface above transformation temperature, so abruptly that the temperature drop in the pane core only begins when the The surface of the pane has already solidified.
- the cooling takes place by blowing the glass pane on both sides with air with the help of special nozzle systems.
- a generic high-convection gas jet nozzle section is known from German Offenlegungsschrift No. 40 02 544.
- the high heat transfer required for tempering thin glass panes made of conventional soda lime glass of 3 mm and below is achieved by blowing the glass panes guided on rollers with nozzle arms arranged parallel to the rollers above and below the glass panel, which arms are used for Upper and lower nozzle ribs are provided with differently distributed nozzle openings so that the same heat transfer is achieved at the top and bottom of the pane, despite the rollers on the bottom, with the same nozzle pressure at the top and bottom.
- the center lines of the nozzle arms are, viewed in the longitudinal section of this device, above and below the roller conveyor on the central perpendicular to the roller division.
- the lower nozzle arms arranged between the rollers have to be lowered. Therefore, only the area between the rollers, reduced by the return flow area for the inflated air flow, is available for accommodating the lower nozzle system.
- the device according to the invention thus extends the field of application of convective heat exchange by blowing a flat material with gas jets for devices for thermally toughening glass in a manner previously unknown.
- Another advantage of the high-convection gas jet nozzle section according to the invention is that the provision of a support device for the lower nozzle system and a suspension device for the upper nozzle system, with which both nozzle systems can be raised in the vertical direction, inevitably removes glass fragments occurring glass breakage very simply designed.
- only the lower nozzle system has to be raised above the upper edges of the transport and support rollers by means of the support device and the upper nozzle system by means of the suspension device by a sufficient amount The distance can be adjusted upwards. The glass fragments can then simply be wiped off the upper surface of the lower nozzle system.
- the width of the lower nozzle caps is smaller than their division, but larger than the difference between the division and the diameter of the transport and support rollers.
- the transport and support rollers advantageously have a small width in relation to their diameter and are staggered across the width of the device, as viewed in the longitudinal direction thereof.
- This configuration of the transport and support rollers results in a slight reduction in the area of the lower nozzle system, while the staggered arrangement enables good support over the entire width of the goods to be transported.
- the transport and support rollers are simply staggered in the transport direction and offset transversely thereto, the transport and support roller division in one track being twice the division of the nozzle caps, and favorable small support widths being created for small pane lengths.
- the transport and support rollers are staggered twice in the transport direction and offset transversely thereto, the transport and support roller division in one track corresponding to three times the division of the lower nozzle caps, whereby sufficiently small support widths are achieved for small items to be treated.
- a further advantageous embodiment of the present invention is characterized in that the width of the backflow gaps is of the order of the size. is the working distance between the upper and lower nozzle caps.
- the transport and support rollers can suitably be driven by frictional engagement of shafts located below them.
- This drive concept by frictional engagement is very well suited in cases in which a sheathing of the transport and support rollers is used with a view to a favorable power transmission.
- Another way of driving the transport and support rollers in the present invention is to connect them to shafts arranged below them by means of drive belts.
- the drive belts in the wrapping of the transport and support rollers form the support for the pane to be treated, so that the drive belts can simultaneously be used as drive and support material for the goods, in the present case the glass pane.
- the distance of the upper nozzle caps from the top of the material to be blown and the distance of the lower nozzle caps from the bottom in the working position of the nozzle arrangements is less than 20 mm and preferably 6 to 12 mm. Very good convective heat transfer properties can be determined in this distance range.
- the vertical stroke when lifting the lower nozzle system is advantageously less than the vertical stroke when lifting the upper nozzle system.
- the upper nozzle system is advantageously raised further than the lower nozzle system.
- the nozzle system for the treatment of curved disks consists of segments which are articulated in groups in each case transversely to the transport direction in such a way that the disk contour is approximated by a polygon, in which the articulation points are in each case in the break points can be.
- This configuration optimally supports curved panes, while the setting of the suitable polyline is suitably adapted to the respective pane shapes by means of a programmable logic controller.
- the transport and support rollers are preferably moved on elastically deformable axles, and the rollers are driven via tubular sleeves made of flexible material, preferably wire mesh or metallic corrugated tube, located between them.
- An embodiment of the high-convection gas jet nozzle section which is particularly suitable for narrow, flat material is characterized in that shafts are arranged between the nozzle ribs as transport and support rollers, the center of which lies below the plane formed by the nozzle caps and the diameter of which is larger than that of two neighboring ones Nozzle caps formed backflow gap.
- Such large-diameter shafts as a transport device offer the flat material a large contact surface, whereby on the one hand the weight pressure on the flat material is small and on the other hand - a shift in position of narrow disks of flat goods in the transverse direction to the transport direction becomes uncritical.
- the transport and support rollers can preferably sit on common shafts driven at their ends lying outside the nozzle field.
- This special design of the drive ensures an advantageous uniform speed of the transport or support rollers.
- FIG. 2 shows a perspective illustration of the device in an embodiment for prestressing flat glass panes with the upper nozzle field cut away halfway;
- FIG. 3 shows a perspective view of a detail from the lower nozzle field of a device for flat glass with integrated support rollers designed as disk wheels;
- Figure 4 shows a corresponding, perspective section of a
- Lower nozzle array device for curved glass panes 5 shows a perspective section of the lower nozzle field for flat glass with continuous arranged between the nozzle ribs
- FIG. 6 shows a carrying wheel arranged between two adjacent nozzle ribs and partially integrated into this, which is driven by a shaft located below it via a drive belt;
- FIG. 7 shows the situation according to FIG. 6 when viewed in the longitudinal axis direction of the device;
- Figure 8 shows a simply offset arrangement of carrying wheels in the lower nozzle field in
- Figure 9 shows a double offset arrangement of carrying wheels in the lower nozzle field in
- FIG. 10 shows a perspective illustration of a section of the device, designed for flat glass, in which the upper and lower nozzle systems are in the raised position in order to enable glass breakage to be removed; 11 shows a cross section of a device for producing cylindrically curved
- FIG. 12 shows a longitudinal section of the device for producing cylindrically curved
- an upper nozzle box 1 and a lower nozzle box 2 are connected to an upper and lower supply air duct for the blowing air, each with a compensator 23o, 23u and an inflow connection piece 20o, 20u.
- This Nozzle boxes 1, 2 correspond exactly or approximately exactly in plan view to the size of the respective nozzle hearth area.
- the nozzle boxes 1, 2 can also be provided with a plurality of inflow nozzles and connected to the supply air lines via a number of compensators. It is also possible, and particularly advantageous in the case of larger systems, to subdivide the entire nozzle hearth area into a plurality of nozzle boxes.
- nozzle ribs 3, 4 consist of a rectangular channel that ends in a strong extension, so that the nozzle ribs 3, 4 in side view, that is to say in cross section, have the shape of a trapezoid with the base pointing toward the outflow side.
- upper and lower nozzle caps 5, 6 are seated on the nozzle ribs 3, 4, each of which has numerous nozzle openings 7o and 7u. In the figures, because of the perspective chosen for the illustration, only the nozzle openings 7u can be seen.
- Backflow gaps 8o and 8u are formed between the nozzle ribs 3, 4 provided with nozzle caps 5 and 6, respectively, through which the gaps on the glass pane. 16 air can flow back from above and below. Since the backflow gaps 8 extend over the entire width of the device and the width of the backflow gaps TB (T minus B) is of the order of magnitude of the distance between the upper and lower nozzle caps, the outflow over the entire blown glass surface takes place essentially only upwards through the backflow gaps 8o between the upper nozzle ribs 3 and down through the backflow gaps 8u between the lower nozzle ribs 4th
- transport panes 10 supporting the pane 16 are arranged in recesses 9 in the nozzle hearth formed from the lower nozzle caps 6.
- these rollers can be driven by means of a drive shaft 11 located under the support rollers via a drive belt 12.
- the drive shaft is driven by a chain drive 13.
- Round cord rings can also be a flat belt, e.g. B. made of Teflon or Kevlar fibers, find use.
- the material sold under the Viton trademark has proven itself as the material for the round cord ring.
- Another possibility of driving the transport rollers 10 is that the drive shafts 11 located underneath transmit the drive torque via frictional engagement in the manner of a friction wheel.
- the drive is carried out by means of a drive belt 12
- only the bearing spacing of the support rollers 10 and the drive shaft 11 would have to be reduced accordingly for this other drive concept.
- This drive concept by frictional engagement can be further improved by the fact that the sheathing of the support rollers 10, which is required anyway, is also selected with regard to favorable properties of the force transmission by frictional engagement.
- the length C of the recess 9 (FIG. 6) is only slightly larger than the diameter D of the idler roller with the drive belt resting thereon.
- T is the division of the nozzle ribs and also the nozzle caps, which is the same for the upper and lower nozzle system:
- FIGS. 8 and 9 show examples in schematic form.
- FIG. 8 shows a simply staggered support roller arrangement
- 9 shows a two-tier arrangement 15.
- the idler roller division in one track is 2 T, with the two-tier arrangement 3 T.
- the impairment of the glass is less, but the span is larger, so that with disc formats with smaller disc lengths, the simply staggered support roller arrangement may have to be used.
- the transverse division A of the rollers 10 is equal to A or A / 2, in the case of the double staggered arrangement A or A / 3 (see FIG. 8 and FIG. 9).
- the upper nozzle system consisting of an upper nozzle box, upper nozzle ribs and upper nozzle caps, is suspended in a suspension device 21. Accordingly, the lower nozzle system 18 is shifted in a support device 22 (FIG. 11).
- the suspension device 21 and the support device 22 allow both nozzle systems to be lifted upward, as can be seen from FIG. 10.
- the upper nozzle system is raised by its height H in relation to its working position, then there is a further joint raising of the upper and lower nozzle systems by the height ⁇ H, so that the transport rollers 10 are now below the surface formed by the lower nozzle caps 6 and glass breakage is simple Way can be removed by pulling this surface to the side.
- continuous rollers 10a can also be arranged, which are either provided with rings, as shown in FIG Direction of rotation are provided in a helical manner with a suitable bandaging.
- the device can also be used for the treatment of curved glass panes.
- the idlers on flexible axis rods e.g. B. rectangular profiles made of spring steel or leaf spring assemblies preferably with a rectangular cross section.
- the wheels are then driven via a sufficiently flexible, yet torsionally rigid, cylindrical sleeve attached to these wheels, e.g. B. a hose made of jet wire braid.
- the function of the device remains unchanged compared to that for flat panes.
- the upper convex curved nozzle system is formed in a similar manner to the concave curved lower nozzle system shown in FIG. 4 by nozzle rib elements which are connected by joints or hinges, e.g. B. piano tapes are interconnected.
- the adjustment can take place either step by step by adjusting the individual frames by hand or automatically by means of electric motors which are activated in the usual way by a programmable logic controller. In this way, it is possible to adapt the prestressing device to the shape of the pane to be produced in the shortest possible time without major conversion work.
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7519894A JPH09508096A (ja) | 1994-01-28 | 1995-01-27 | 高対流伝熱率を与える気体噴射式窓ガラス焼戻し装置 |
EP95906994A EP0741673A1 (de) | 1994-01-28 | 1995-01-27 | Vorrichtung zum thermischen vorspannen von glasscheiben bei hohem konvektivem wärmeübergang durch beblasen mit luft |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19944402606 DE4402606C2 (de) | 1994-01-28 | 1994-01-28 | Hochkonvektions-Gasstrahldüsenstrecke zum thermischen Vorspannen flächenhaften Gutes, insbesondere Glasscheiben |
DEP4402606.4 | 1994-01-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995020546A1 true WO1995020546A1 (de) | 1995-08-03 |
Family
ID=6508940
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1995/000298 WO1995020546A1 (de) | 1994-01-28 | 1995-01-27 | Vorrichtung zum thermischen vorspannen von glasscheiben bei hohem konvektivem wärmeübergang durch beblasen mit luft |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0741673A1 (de) |
JP (1) | JPH09508096A (de) |
DE (1) | DE4402606C2 (de) |
WO (1) | WO1995020546A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2768142B1 (fr) * | 1997-09-11 | 1999-11-05 | Saint Gobain Vitrage | Dispositif de refroidissement de feuilles de verre bombees |
CN101980980B (zh) * | 2008-03-31 | 2014-01-15 | 旭硝子株式会社 | 玻璃板的风冷强化装置及风冷强化方法 |
IT1392310B1 (it) * | 2008-12-15 | 2012-02-24 | F&C S R L | Soffiante, in particolare per il raffreddamento di un vetro in un ciclo di tempra, apparato di raffreddamento ed impianto di tempra utilizzanti tale soffiante. |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2144523A2 (de) * | 1971-07-02 | 1973-02-16 | Saint Gobain | |
EP0249161A2 (de) * | 1986-06-09 | 1987-12-16 | Ppg Industries, Inc. | Einstellbare Abschreckvorrichtung für das Tempern von heissen Glasscheiben |
WO1989001458A1 (en) | 1987-08-07 | 1989-02-23 | Glasstech International L.P. | Glass bending and tempering apparatus |
EP0389323A1 (de) * | 1989-03-22 | 1990-09-26 | Selas S.A. | Vorrichtung zum Biegen und Härten einer Glasscheibe |
EP0440113A2 (de) * | 1990-01-29 | 1991-08-07 | Wsp Ingenieurgesellschaft Für Wärmetechnik, Strömungstechnik Und Prozesstechnik Mit Beschränkter Haftung | Hochkonvektions-Gasstrahldüsenstrecke für über Rollen geführtes, flächenhaftes Gut |
EP0440884A1 (de) | 1990-02-08 | 1991-08-14 | Wsp Ingenieurgesellschaft Für Wärmetechnik, Strömungstechnik Und Prozesstechnik Mit Beschränkter Haftung | Vorrichtung zum Wölben von Glasscheiben |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4957531A (en) * | 1987-08-07 | 1990-09-18 | Glasstech, Inc. | Apparatus for heating bending and quenching glass sheets |
US5047077A (en) * | 1990-05-24 | 1991-09-10 | Glasstech, Inc. | Combination heater quench |
-
1994
- 1994-01-28 DE DE19944402606 patent/DE4402606C2/de not_active Expired - Fee Related
-
1995
- 1995-01-27 WO PCT/EP1995/000298 patent/WO1995020546A1/de not_active Application Discontinuation
- 1995-01-27 EP EP95906994A patent/EP0741673A1/de not_active Ceased
- 1995-01-27 JP JP7519894A patent/JPH09508096A/ja active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2144523A2 (de) * | 1971-07-02 | 1973-02-16 | Saint Gobain | |
EP0249161A2 (de) * | 1986-06-09 | 1987-12-16 | Ppg Industries, Inc. | Einstellbare Abschreckvorrichtung für das Tempern von heissen Glasscheiben |
WO1989001458A1 (en) | 1987-08-07 | 1989-02-23 | Glasstech International L.P. | Glass bending and tempering apparatus |
EP0389323A1 (de) * | 1989-03-22 | 1990-09-26 | Selas S.A. | Vorrichtung zum Biegen und Härten einer Glasscheibe |
EP0440113A2 (de) * | 1990-01-29 | 1991-08-07 | Wsp Ingenieurgesellschaft Für Wärmetechnik, Strömungstechnik Und Prozesstechnik Mit Beschränkter Haftung | Hochkonvektions-Gasstrahldüsenstrecke für über Rollen geführtes, flächenhaftes Gut |
EP0440884A1 (de) | 1990-02-08 | 1991-08-14 | Wsp Ingenieurgesellschaft Für Wärmetechnik, Strömungstechnik Und Prozesstechnik Mit Beschränkter Haftung | Vorrichtung zum Wölben von Glasscheiben |
Also Published As
Publication number | Publication date |
---|---|
JPH09508096A (ja) | 1997-08-19 |
DE4402606A1 (de) | 1995-08-03 |
EP0741673A1 (de) | 1996-11-13 |
DE4402606C2 (de) | 1996-09-05 |
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