• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1470174 Modifying glass surfaces PILKING- TON BROS Ltd 20 Nov 1974 [23 Nov 1973] 54497/73 Heading C1M The surface 32 of glass 30 is modified by contact with molten metal body 36, the glass being subjected to anodic treatment causing cation migration from body 36 to glass 30, the glass being periodically treated during the migration to cathodic treatment by transmission of a cathodic pulse of preset duration to body 36, and the time interval between the end of the cathodic treatment and the resumption of the anodic treatment being regulated. The cathodic pulse duration may be such as to cause migration of cations from the glass into body 36 to maintain non-oxidizing conditions therein. The quantity of such cathodic electricity may be 5-50% of that in the anodic treatment. Alternatively, the cathodic pulse may be applied before the cations introduced by migration into the glass 30 can disperse from surface 32, so that some at least of the cations are reduced to give a metallic dispersion. For the latter purpose the cathodic electricity should be 30-99% of the quality of anodic electricity. The molten metal body 36 may be located on a bar 31, the glass 30 being supported on molten metal bath 10. The treatment may be at 700-800‹ C. in an atmosphere of 90 vol. per cent N 2 and 10 vol. per cent H 2 . Molten metal body 36 may be of indium (bar 31 being mild steel), lead (bar 31 of Ru. coated steel) or an alloy of 98 wt. per cent Pb and 2 wt. per cent Cu (bar 31 of copper).
    公开号:SU902660A3
    申请号:SU742082393
    申请日:1974-11-22
    公开日:1982-01-30
    发明作者:Гордон Лоукес Дэвид；Рамсей Малтмэн Вильям；Роберт Ховард Колин
    申请人:Пилкингтон Бразерз Лимитед (Фирма)；
    IPC主号:
    专利说明:

    pulses applied to the mass of molten metal; in fig. A is a device for modifying the surface of a glass ribbon.
    The device comprises a front horn 1 of the furnace for continuous melting of glass and a regulator 2. The front horn ends with a chute 3) containing a drain toe A and side drains 5, one of which is shown. Drain toe and side sinks 5 together form a rectangular gutter. Tree 3 is located above the bottom 6 of the elongated tank structure, including side walls 7 joined together to form the end wall 8 at the inlet end of the reservoir and the end wall 9 at the outlet end of the tank. The tank maintains a molten metal bath 10 whose surface level is designated 11. The bath may, for example, be a bath of molten tin or molten alloy in which tin prevails and which has a density greater than that of glass.
    The roof is supported above the tank and includes a cover 12, side. walls 13 and end walls N 15, respectively, at the inlet and outlet ends of the bath. The entrance end wall 1 extends down to the surface 11 of the molten metal bath 10 to delineate with this surface an inlet 16 which is limited in height and through which the molten glass enters the bath. The outboard end wall 15 of the roof with the outlet end wall 9 of the tank outlines an outlet 17 through which a narrow glass tape obtained on the bath is discharged onto conveyor rollers 18 mounted outside the outlet end of the tank and located above the level of the top of the end wall 9 P of the tank. The resulting narrow strip of glass rises above the top of the wall 9 for discharging from the bath through the outlet 17. THE ROLLERS 18 transfer the resulting narrow strip of glass, having a modified surface, to the annealing and also apply traction force to the strip of glass so that the formation of glass on the bath proceeds at an adjustable rate .
    The extension 19 of the roof extends to the regulator 2 and forms a chamber with side walls 20 in which the chute 3 is placed. The glass usually has
    the content of alkali oxide - -) metal from 10 to 20 wt. / ,. Usually it is soda-lime-siliceous glass.
    Molten soda-wicked-silica glass, 21, for example, containing an alkali metal oxide in an amount of from 12 to 16 weight. The molten metal bath of molten metal from chute 3 is poured, and the regulator 2 controls the flow rate of molten glass 21 over the drain spout of chute 22. The glass temperature, when it enters and passes through the bath at the inlet end, usually around 1050 ° C, and along the bath exists the temperature gradient, so that at the exit end of the bath, where the finished strip is unloaded, it is 650 ° C. This temperature gradient is controlled by the heating elements 23, which are mounted in the roof and produce radiation towards the molten metal bath and the strip of glass passing through the bath.
    The protective atmosphere is maintained by injecting a space above the bath through pipes 2k, which are connected by means of taps 25 to a collector 26, a protective gas, preferably containing a reducing component. Typically, the protective atmosphere contains 104 hydrogen and nitrogen.
    The temperature of the molten glass entering the bath is controlled by the heating elements 23 at the inlet end, with this layer of molten glass 27 is installed on the bath and enters through the inlet 16. The width of the tank at the surface level of the bath is greater than the width of the melting glass the current towards the molten glass is not contained.
    权利要求:
    Claims (1)
    [1]
    An electrode 28 in the form of a rectangular metal barrier is mounted across the reservoir above the path of movement of the upper surface of the strip 29. There is a gap, for example, mm, between the lower plane of the electrode 28 and the upper surface 30 of the narrow strip of glass. The electrode 28 is supported in place by a stand 31, which is suspended to an electrically conductive bar 32 attached to a tank handle. The electrical connection to the electrode 28 is made through the bar 32 and the stands 3. The molten metal bath 10 is also connected to the source of electrical energy by means of an electrode 33, which is immersed in the bath along the path of the narrow glass strip. Electrode 28 is located in a tank, where the temperature of the glass strip is in the range of 700 to and maintains the mass of molten metal making a narrow strip of flat glass having the atomized metal of a given intensity in the upper surface, a wave voltage is applied to the mass of the molten metal moving anodic and cathodic pulses of a given duration, separated by predetermined intervals and so associated with the speed of the glass strip determined by the speed of the pull rollers 18, At least one anodic and one cathodic pulse is created during the advancement of strip 29 below the mass of molten metal 3. One of the possible types of voltage waveforms is shown in FIG. 3- This waveform is obtained from a voltage source of 50 Hz and consists of half-wave units that have a duration of 10 ms. The VQ-amplitude of the anode pulse and the amplitude of the cathode pulse are applied to the molten mass H. These amplitudes are regulated and usually differ from each other. The current pulses that make up the waveform (Fig. 31) come from two thyristor bridge rectifiers (Fig.), Respectively, 35 and 36. Bridge 35 is a source of positive anode pulses created between terminals 37 and 38. Clamp 37 is connected by means of line 39 to an electrically conductive bar 32, which supports the electrode 28 above the narrow glass strip.Cong 38 is connected by means of line 40 to electrode 33, which is in contact with the molten metal bath. Bridge 35 has clamps And and C2 connected to secondary winding C transformer ora k having a primary winding 45 for connecting to a 50 Hz power source. The k6 circuit contains two diodes 47 and 48. The bridge also contains a thyristor 49 and 50 with shunt circuits 5 and 52. The thyristor is triggered by pulses to terminals 53 and 5, and the start of the thyristor 50 is provided by pulses to terminals 55 and 56, coming from a pulse generator (not shown). The bridge B, which generates cathode current pulses, is similar to bridge 35. This bridge has terminals 57 and 58, respectively, connected via lines 59 and 60 with a connecting rod 32 connected to the electrode 28 electrode 33 immersed in the molten metal bath. Clips 61 and 62 of bridge 36 are connected to the secondary winding 63 of the transformer Gk, whose primary winding 65 is connected to a 50 Hz power source. Circuit 66 bypasses the secondary winding 63. The two rectifying diodes 67 and 68 form two arms of the bridge and, accordingly, connect clamp 57 with clamps 61 and 62. A thyristor 69 of a bridge with a shunt circuit 70 is connected to clamps 61 and 57 and has clamps 71 and 72 for receiving starting pulses. Thyristor 73 with its shunt circuit 7 is connected to terminals 62 and 57 and receives start pulses at terminals 75 and 76. Starting pulses to the switching circuit (FIG. A) are received to terminals 55, 5b and 75, 76 from a pulse generator (not shown) . As an example of the device implementation, a rectangular electrode made of mild steel and a mass of 3 molten indium adjacent to this electrode was chosen. Main characteristics of the device Strip speed, m / h 30 Band width, mm 200 Strip thickness, mm 6.0 Strip temperature in the electrode area. Atmospheric composition over water, 90 nitrogen. Electrode characteristics: Basin composition 1001 indie Electromagnetic steel material Electrode shape Front barrier (150 x 50 mm) Electrode width (across the bath), mm. 150 The area of the bottom of the electrode, see 75 Jonahs from the bottom. Indium is transferred to glass during each anode of a pulse, while trivalent indium ions are concentrated towards the surface of the glass and are restored on the surface of the glass during the next cathodic pulse. A stronger cathode treatment leads to an increase in solar absorption and transmission properties of direct solar radiation. The amplitude, duration, and temporal location of the pulses can be adjusted, which makes it possible to change the sprayed metal. Apparatus for modifying the surface of a glass ribbon, comprising a metal substrate with molten glass, an electrode and a power source, characterized in that, in order to improve the quality of the modification, the device is equipped with a pulse generator and a switching circuit made in the form of two bridge circuits with diodes, transformers , thyristors and contacts for starting the thyristors, with the terminals of the first diagonal bridge circuits interconnected, the power supply connected to the input of the impulse generator owls and through transformers to the terminals of the second diagonal of the bridge circuit and the electrode substrate bridge circuits, and the pulse generator output is connected with contacts for triggering thyristor bridge circuits. Sources of information taken into account during the examination 1. UK patent application No. 1922359/33, cl. On 03 On 21/00, 1973.
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    同族专利:
    公开号 | 公开日
    BE822527A|1975-05-22|
    JPS50112409A|1975-09-03|
    DE2456041B2|1979-04-05|
    DE2456041A1|1975-05-28|
    ES432197A1|1977-02-16|
    FR2253722A1|1975-07-04|
    SE399244B|1978-02-06|
    NL7415255A|1975-05-27|
    IN143088B|1977-10-01|
    DE2456041C3|1979-11-29|
    JPS5536612B2|1980-09-22|
    US3958969A|1976-05-25|
    FR2253722B1|1979-10-12|
    AU7544974A|1976-05-20|
    LU71324A1|1975-05-28|
    AR204019A1|1975-11-12|
    IT1023928B|1978-05-30|
    TR18341A|1977-01-12|
    GB1470174A|1977-04-14|
    ZA747332B|1975-12-31|
    CS178936B2|1977-10-31|
    BR7409830A|1976-05-25|
    CA1032760A|1978-06-13|
    SE7414653L|1975-05-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    LU48532A1|1965-05-06|1966-11-07|
    US3632321A|1967-04-28|1972-01-04|Glaverbel|Process for enhancing the effectiveness of chemical tempering operations of vitreous material|
    GB1382837A|1971-09-17|1975-02-05|Pilkington Brothers Ltd|Manufacture of patterned glass|
    US3765855A|1971-12-30|1973-10-16|Us Navy|Electro-ionic method of strengthening glass|GB9523129D0|1995-11-11|1996-01-10|Pilkington Plc|Improvements in or relating to the manufacture of glass|
    US7318330B2|2003-06-27|2008-01-15|Schott Corporation|Mobile device and a process for the production of glass|
    US20080022721A1|2006-07-25|2008-01-31|Bernd Disteldorf|Method of making glass including surface treatment with aluminum chloride at or just prior to annealing lehr|
    US9988304B2|2011-09-02|2018-06-05|Guardian Glass, LLC|Method of strengthening glass by plasma induced ion exchanges in connection with tin baths, and articles made according to the same|
    US8485245B1|2012-05-16|2013-07-16|Crucible Intellectual Property, Llc|Bulk amorphous alloy sheet forming processes|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    GB5449773A|GB1470174A|1973-11-23|1973-11-23|Manufacture of glass|
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