DE1932275C - Evaporation Process for producing a coating on the upper surface of a glass ribbon during the float glass process - Google Patents

Description

According to the invention, this task is thereby achieved. .-iuss that (herzugmaxrial from a direct (in the millimeter range) next to the surface of the still

A Floatglasanlagc conventional construction comprising, in a elongated container 2 Jn ß; ad I of molten metal, for example molten tin or tin alloy ^1, in the tin over pointed and having a specific gravity greater than i; ls do the glass is. Via an output (not shown)! ' The molten glass fed in is fed into the jjeschmo'-line bath and out of it during its. Movement along the bath a glass ribbon 20 g ^ · -

„.„ „Υ unjji.iMuiii.iiii riaiicr from

electrically conductive material held by adhesion and a regulated electrical heating current through the Holder is directed.

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plastic hoat glass -! ordered molten 30 forms. The glass ribbon 20 is used during the For; Body νerdarnpit. the temperature of steam in overall movement is still plastic with a 'eSiIa'lii ^r _d ^{ampf on the} Gla ">rvrf" provided by evaporation. For this, the ;. "äche low-coating R' ^ ^{e 'ne} device one holder in the form

«A preferred \ guided tour. is a rod made of refractory metal, for example Wniisenen. that the I berzugsrnatenal ram on a transversely ZjR 35 "or molybdenum, which at the same time as the container fi.r ^ ^a. \" is formed. ^ parent holder from the coating material. For this

The purpose is its massive lateral Ππ "en 31 isoh.tt supported on the side walls 5 of the bath tank

·; f .. The middle part, which extends over the entire width

ha 11 ^U ^ ^rZu f material extends close to the 40 of the glass ribbon 20, has side walls 32 acting glass surface is evaporated, comes on, which extend transversely to the longitudinal direction of the ribbon ts only in vapor form ma this in calming, there and one Bottom 33, which consists of porous refractory material, preferably porous tungsten, on the short way to the glass surface, consists of auric condensanone, which can be formed by sintering tungsten. The pages len. ts is thus properly a ,, - eggs metal film walls 32 and the bottom 33 define a bath · l F £ ^fl sciences warranty for a pool 34 of molten coating can the steam on the short path materials. This molded body 34 can not dikes -ne by the Schm / gasatmo- spiefsweise of molten silver consist The 11 ·· α - ^r ^ ™ ™ ^{n a} ^ ⁿ .. wtrdtr 50 but non-oxidizing atmosphere in the space above entirely in The evaporation of bath 1 protects both the holder and the • u -n ^ng if ^ZU l ^K ° ⁿ densat.on. This renders molten silver 34 against oxidation.
Flotts in the ⁵ J ¹ *?! ^ Guaranteed. As _to the solid ends 31 of the holder are high

P ^ en er οLt an obe h H i '"I ^d " ^m _c ^daS connected to "power busbars 35, which are connected to the point" feiendeS? "T · ⁵ ^^" ^ " ⁵⁵ Secondary winding of a high power transformer

Damage below dl? F ™ ft ^ ^k i ^{niien keme 36} are connected to an alternating current as SSÄrSdu ^ d ^ iSST'iTf ¹¹¹¹ * / ¹¹¹¹¹¹ "" ^HeizStrom »« '»' öbren. The current is with a digit ^ rS, borrowed sinH ™. ^the nearness of the evaporation comparatively small voltage, but great curdling dureh dS 7? a ^ u "'- ^{ht strength} ' ^at * P '" alternatively of 2000 Amp., supplied and St des ΟΪ «ΓΪΪ? Ρ,? · α ⁸ , ^speed - ^{6o increases} the temperature of the holder to over 2000 ° C . Vhohen Temneratnren J n · "r"' ^ku ? ^E _o ^{time Ό} * Frequency of the alternating current is usually -ta Jes GtaS d ^^ T Ä ^S ° ^{that d} " ^Nelzfre q ^ue " ^ However, both frequency and -mve η wü ^d d is prevented ^K ° ^{ndenSieren he} "·" *. '"" output current of the transformer as Practice "u." miiilri "i VKL j η, s ο · .." be regulated in order to the stock 34 of the geschmol -

Tin w2 S? nej God, silver, copper, S ₅ zenen coating material given temperature to be used to regulate aluminum, as well as the temperature of the porous bottom 33

When using 7in “im, ·. ^{of the holder} · ^{so that the} coating material through the

»When using tin as a coating ₅ matena! Soil passes through and on the lower surface of the

932 275
j -r ⁴

Holder a film 37 of molten ibczugs- In the embodiment according to F. G. 2 wiul em

ϊ-.aicrial forms, which extends across ub, r the entire width holder m form emes elKn Sc fk cn ^

_cj .s glass ribbon 20 by adhering to the LnteifläJie Kohlenstott uses the 4 ^ut - ^rl ,

k bottom 33 extends. The film 37 vurd continuously treating Glashand 20 ^ eck and m ^ replaced by molten excess maicrial, the 5 cross winds 3 of the body

; 'Eh backsakert the porous floor 33. that its lower surface is close above, la b J ^

"■ an 'embodiment of the bottom 33 is made of band 20. The scout ^ Jen Jr ^ ™ £

,., riisem wolf. at 3mm thick, and the surface of the boat and the glass surface

i ,. The bottom has a width of 50 mm in the direction s _P , e! S wise 2 mm. ^ chmolten fber-

, ··. r Prowemmi the ribbon of glass 20 across the pool. _Jo Ln flat body 4- au, -e et m

v _r supply 34 of neschmoSzenem additional material Zugmatal is in the Sen k κ e halUη

!;.; ·. a depth of e "tua" im. In the drawing there are relatively large dams

,:.: For the sake of clarity, this dimension. :: but- points. for example from refractory

'1 ^ Ätr ?: ⁱ bath trimmed that the lower, ^ f ^ »^"^^; ι .Jk- of the porous bottom 33 very close to that provided and by rods 44 at the υ , .., - rfVaehe 38 des Gbsbandes 2 (1 lieal. Re ^ ekwe.se hood of Baclhehulicrs l ^ t ^ gt. D. ^ . _u ,, _t the distance between the film 37 from above, se.tl.di % \ * ™ ^ ⁿ £ ' ZJSLte der Omul / enemmetall und der Obertlaeb ,, 38 of the glass-like channels ^ S zsv ^ r, η Jer inn ,, des 2 mm. Since the glass on a, ho!, n lempe- - cap and the Au en, before the ha ^. ^ ₀ ■ ar., for example, are in the area between W) O, which as L "^" ^^^ V. ^. ^ _Dunipfc des ...., 5 <. C is maintained, there is no danger that the molten body will dump the glass of the molten body

.J-.adi.en can. On the other hand, _"t the lcmpera.ur Schi.tchen are be.de U aut du _e. Loen j

\ Cilases enough n.edng to get a K. ». Den> aiion, 5 ratur by elektr.sci, en Ikus r <-rh, ¹ ^. ,, _r Nktalldample formed from the film 37 on the temperature of the urine bu ^ '^ "^ .., _2f , -r upper surface of the (ilasbandes to allow. Downward against the OK.t aJn. Of the t a.

By gkichmäß.ge formation of the film 37 by "" _h ^ Ä the full width of the glass ribbon results in s, _c h eme also oberilaehe condensing e e. ν u ic

.uch Maßi.eB.ldun., of metal vapor that in Rieh- ₃ o can be near the Ik, Ι, .η ^ J »* _di ; _dl

ü. " _fi is directed towards the glass surface. and thus melted N '^ ^ J "ßTandlun closer to the" nc eleichmalii..e condensation of the metal on which it is before long where the Ulanüa, ("as surface. Condensed metal particles can be discharged"^rd; ^ J ^L ™. _fwcist . ",,, into the hot glass surface in a certain form ^ P ^lcls * ^clst 7! ⁿ ; L ^^ of the glass

, n: SSE, sink, whereby the condensed Metallt.lm 35 "due to the ^ '- HMF .gn onbe .fcun _f," it is locked to the glass surface, resulting check ribbon beneath d "JJ ¹ ^ J ^^^ _{e ERW} armun, ne outeru, rden, l, ch great durability of the metal - the hanger results in a proper coating on the glass. ί, ηΗΙηί. of the position within the float method

After passing through the Glasbaiu'es under the landlun, at every S Ue _f , _{surface nQL} . _{h gc} .

Holder will take up the treated cila> surface m the 4o u ^ ol ^ n can ^ nge to

, usual way be, the further locomotion along jug .id heMJ * ¹ · _o ., _{cnd Kalti um} das

of the bath is cooled until the temperature is about 600 (can _u "d arultr ^ b coating material too., m the cold end of the bath ene.ht, oc-i the condensate ζ £ ™ £ ^ \ P. _hmolten en metals

To prevent upper pull. never "invention" can also be used to treat

Wi.d the hot glass surface just formed D. ^ Erfmdun ka ^ ^^ _yef _

treated so by the you, besides, hrerfo - - ° ^^^ "^ _{6 them for} television screens or

low evaporation of a molten metal is used who len ^^^^ _{D. g he [jn} _

an extraordinarily good hardening between the ^ "^" g ^ er the treatment of WaIz metal and the glass surface is achieved, wöbe, the pretension can be erne £ .η _tert glass or

Partial properties of the floal glass not .chad- B ^ 'JJ ^ S ^ used _for glass building blocks are influenced. "^,", R _e flexion properties of the surface

The even heating d «g ^ h ™» tenen «^^^^", _G f _{as are} often advantageous. Metal jtder to its evaporation in addition to the glass top ^Dei _M invention may also objects surfactant leads to the formation of metal gle.chmaß.gen _ei ^ £ .swe hollow glass articles such as hollow Glasübe.zügen on the glass. Other metals, except ^ p.el wise homeu ß ^ are treated. Silver to carry out the; according to the invention 6o gustone or glass sola ^ ^ ^^^

Are suitable method, s.nd gold, copper, tin, Derar ^not g ^ * J _{h ü d Heissi to} vapors

half of the bath or within the handbook. s.na. _Invention for the formation of

lungszone can be used by a hood covering the holder J «^ ^r _E J ^ _n ⁿ _K ™ ^e _f ^ _G Les,

if used for treatment molten silher or Aluminum can be used.

Heat radiating glasses can by using formed by gold or copper. Iron oxides are also suitable for this purpose Form of vapor on the glass surface at the hot end of float glass during its manufacture of the glass surface be fed to solve in this.

Ciliis with optical interference can be obtained by oxidizing metal coatings or by applying them by fumes of an oxide on the glass surface. Multi-layer coatings can can be applied, for example, to optionally reflect infrared heat radiation.

Colored glasses can be achieved by oxidation of the metal coating formed on the surface of the glass will. For example, a coating of metallic cobalt can be oxidized to cobalt oxide achieve a blue coloration of the glass, in which the cobat oxide in the glass surface by suitable ao nete temperature setting solves. In the same way, coatings made of nickel. Chrome or manganese be applied as a coating by the method according to the invention and by subsequent oxidation and solution in the glass cause coloration. Nickel oxide turns gray. Chromium oxide one Green color and manganese oxide a purple color.

Furthermore, electrically conductive glasses can be achieved by placing a thin on the glass surface Coating of goid or a mixture of tin oxide and antimony oxide is formed. More than one metal or metal oxide can be used, with as a starting material metal alloys, for example a pewter-anttonone grade can be used ! • ann. or a double treatment of the glass surface takes place in which this first a vapor of one metal and then a vapor of the other metal / ucelivered.

Claims (6)

Patent claims: 1. Process for the production of a coating; on the upper surface of a glass ribbon during the float glass process by vapor deposition, i.e. characterized in that the covering material consists of a directly (in the millimeter range) next to the surface of the nocli plastic). Molten float glasses arranged Body evaporates, the temperature of the steam regulated and the steam on the glass surface is knocked down. 2. The method according to claim 1, characterized in that that the coating material is arranged on a transverse to the movement path of the glass Holder made of electrically conductive material held by adhesion and a regulated electrical Heating current is passed through the holder. 3. The method according to claim 1 or 2, characterized in that gold is used as the coating material. Silver, copper. Tin. Bismuth, zinc or aluminum can be used. 4. The method according to claim 3, characterized in that when using tin ah Ubcrzujmatcrial the still hot, provided with the coating glass surface is exposed to an oxidizing atmosphere to form a coating of tin (IV) oxide. 5. The method according to claim I or 2, dadurc !; characterized in that bismuth and silicon oxides are used as the coating material. Titans. Iron or antimony be used. 6. The method according to any one of claims 1 to 5 characterized. that as a coating material Cobalt. Nickel. Chromium or manganese used and this after the deposition of an oxidizing Exposed to the atmosphere and thereby converted into oxides. 1 sheet of drawings