CS242513B1 - Apparatus for treatment of unilateral metal coating of a steel sheet belt namely by zinc in continuous link - Google Patents
Apparatus for treatment of unilateral metal coating of a steel sheet belt namely by zinc in continuous link Download PDFInfo
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- CS242513B1 CS242513B1 CS845116A CS511684A CS242513B1 CS 242513 B1 CS242513 B1 CS 242513B1 CS 845116 A CS845116 A CS 845116A CS 511684 A CS511684 A CS 511684A CS 242513 B1 CS242513 B1 CS 242513B1
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- steel sheet
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Description
Vynález sa týká sposobu výroby jednostranné pokovovaného ocelového pása plechu najmá zinkom v kontinuálnej linke a rieši problém zabezpečenia výroby tohto žiadaného materiálu vůbec s možnosťou vytvorenia čistej celej jednej strany alebo úsekov pása pri běžných technológiách pokovovania.The present invention relates to a process for manufacturing a single-sided metallized steel strip, in particular with zinc in a continuous line, and solves the problem of ensuring the production of this desired material at all with the possibility of creating a clean whole one side or strip sections in conventional metallization technologies.
Doteraz známe sposoby jednostranného pokovovania pásov ocelového plechu najmá žiarovým nanášaním zinku, sú založené v podstatě na dvoch druhoch technologií.The previously known methods of one-sided plating of steel sheet strips, in particular by zinc coating, are basically based on two kinds of technology.
V prvej skupině prevládajú technologie založené na čiastočnom, t. j. jednostenovom ponoření v pokovovacom kúpeli alebo jeho jednostranným nástrekom v zvislej alebo vodorovnej úrovni pri súčasnej zábraně preniku materiálu za hrany plechu, viac alebo menej účinné.In the first group, technologies based on partial, ie. j. single-dip immersion in the plating bath or its one-sided spraying at a vertical or horizontal level, while preventing the penetration of material beyond the edges of the sheet, more or less effective.
Jednostranné nanášanie alebo postrek sa deje například vřením a vibráciou hladiny kúpela a odfukom tryskou nad pásom vedeným tesne nad hladinou kúpela, resp. využitím hydromechanických kapilárnych sil alebo na báze kaskádového prúdu kúpela dotykom na pás uvedený v miernom sklone.One-sided application or spraying is effected, for example, by boiling and vibrating the bath level and by blowing through a nozzle above the strip just above the bath level, respectively. utilizing hydromechanical capillary forces or based on a cascading bath flow by touching the belt at a moderate slope.
Všetky tieto sposoby sú technologicky náročné a vyžadujú náročné a drahé zariadenie, pričom nie je zaručená zábrana čiastočného pokovovania druhej strany.All these processes are technologically demanding and require expensive and expensive equipment, while the other party's partial plating is not prevented.
Pri použití klasického sposobu pokovovania ponorom v roztavenom kúpeli sú pokusy s tzv. maskováním jednej strany vstupujúceho pása, pričom ako maskovacie činidlo sa používajú rožne keramické materiály nastrekované rovnako náročnou technológiou, ktoré sa snímajú po ukončení pokovovania, a to náročnými mechanickými alebo chemickými prostriedkami. Všetky tieto sposoby sú energeticky náročné a prácne.Using the classical method of hot dip dipping in a molten bath, experiments with so-called dipping are used. by masking one side of the inlet web, using as a masking agent a variety of ceramic materials sprayed with the same high-tech technology that are removed after the plating is completed by demanding mechanical or chemical means. All these ways are energy intensive and laborious.
Uvedené nedostatky odstraňuje a problém rieši sposob výroby jednostranné pokovovaného ocelového pása plechu najmá zinkom v kontinuálnej linke podlá vynálezu.These drawbacks are overcome and the problem is solved by a method for producing a one-sided metallized steel strip, in particular zinc, in a continuous line according to the invention.
Podstata vynálezu spočívá v tom, že pás plechu po obojstrannom pokovení žiarovým nanesením v kúpeli, po ustálení a zrovnomernení najma vrstvy trvalého pokovenia, sa najprv ochladí na 40 až 80 °C a potom sa pomocou nanášacleho valca najmenej na jeho jednu stranu nanesie maskovacie médium nerozpustné v kyselinách a l'ahko snímatelné. Po dalšom ochladení nanesenej vrstvy média a pása plechu na teplotu 20 až 30 °C sa pás ponoří do roztoku kyseliny například solnej po dobu 2 až 7 sekúnd vo vztahu k hrúbke plechu a rýchlosti pása.SUMMARY OF THE INVENTION The invention is based on the fact that after the two-way hot dip coating in the bath, after stabilizing and leveling, in particular the permanent plating layer, the strip is first cooled to 40 to 80 [deg.] C. and then in acids and easily removable. After further cooling of the deposited medium and sheet metal to a temperature of 20-30 ° C, the sheet is immersed in a solution of, for example, hydrochloric acid for 2 to 7 seconds in relation to sheet thickness and sheet speed.
Po, vyžmýkaní pása od kyseliny sa tento v oplachovacom priestore oplachuje postrekom a vysuší sa povrch pása. Nakoniec sa snímatelné maskovacie médium odstráni z povrchu príslušnej strany pása mechanickým stieraním.After the strip has been removed from the acid, it is rinsed in the rinsing area by spraying and the strip surface is dried. Finally, the removable masking medium is removed from the surface of the respective side of the belt by mechanical wiping.
Rozpuštěný kov z nemaskovanej strany pása zhromaždený v nádobě sa odvádza k regenerácii a k ďalšiemu použitiu pri pokovovacom procese.The dissolved metal from the unmasked side of the strip collected in the container is recycled for recovery and further use in the plating process.
Výhody vynálezu sú hlavně v tom, že možno použit najvýhodnejšiu technológiu a la,cné zariadenie na oboustranné pokovovanie, pričom samotné odstraňovanie nanesenej vrstvy na jednej straně je jednoduché a ekonomicky výhodné s možnosťou použitia kovověj substancie po regenerácii roztoku. Umožňuje sa vytvořit kvalitný nepokovený povrch jednej strany alebo na druhej straně ponechanie obojstranného pokovovania plechu na různých úsekoch pása plechu. Vylučuje sa náročná technológia jednostranného pokovovania pása plechu.The advantages of the invention are mainly in that the most advantageous technology and lacquering device for double-sided plating can be used, whereby removing the deposited layer on the one hand is simple and economically advantageous with the possibility of using a metallic substance after regeneration of the solution. It is possible to produce a good quality non-metallized surface on one side or, on the other hand, to leave double-sided plating of the sheet on different sections of the sheet. It eliminates the demanding technology of one-sided plating of sheet metal.
Příklad uskutočnenia spůsobu podlá vynálezu:An embodiment of the method according to the invention:
Ocelový pás plechu sa nanesie obojstranne pokovovacou vrstvou zinku žiarovým spůsobom, t. j. po· navedení cez pokovovací kúpel a zvislým výnosom za súčasného ustalovania vrstvy pomocou tzv. pneumatických nožov. Cez vynášacie a prevádzacie válce je pás vedený v horizontálnej polohe cez chladiaci úsek, kde sa ochladí na 80 CC. Potom prechádza cez navalovací válec čiastočne ponořený do tekutého maskovacieho média.The steel strip is applied on both sides with a zinc plating layer in a heat-resistant manner, i.e. guided through the plating bath and with a vertical yield, while stabilizing the layer by means of a so-called coating. pneumatic knives. Through the discharge and transfer rollers, the belt is guided in a horizontal position through a cooling section where it is cooled to 80 ° C. It then passes through a rolling roller partially immersed in the liquid masking medium.
Maskovacie médium sa nanesie na spodnú stranu pása plechu, ktorý prechádza cez sušiaci úsek, kde sa dalej pás ochladí na 30 °C. V dalšom rozpúšťacom úseku je pás uvedený v roztoku kyseliny solnej s výdržou 7 sekúnd pri hrúbke plechu 0,5 mm a na jeho konci sa pás vyžmýka pomocou žmýkacích valcov.The masking medium is applied to the underside of the sheet metal strip, which passes through a drying section, where the further strip is cooled to 30 ° C. In a further dissolution section, the strip is introduced in a solution of hydrochloric acid with a holding time of 7 seconds at a sheet thickness of 0.5 mm and at the end of the strip the strip is swung out by means of squeeze rollers.
V nasledujúcom oplachovacom úseku sa pás obojstranne oplachuje vodou a po výstupe z neto' sa žmýka a suší. Nakoniec je pás vedený spodnou nanesenou stranou po mechanickom stierači, kde sa maskovacie médium zotrie a vyhladí a nakoniec sa pás navinie do zvitku pre ďalšie spracovanie alebo upraví pre expedíciu.In the following rinsing section, the belt is rinsed on both sides with water and, after leaving the net, it is spun and dried. Finally, the strip is guided from the bottom by a mechanical wiper, where the masking medium is wiped and smoothed, and finally the strip is wound into a roll for further processing or prepared for dispatch.
Vynález možno využit pri všetkých druhoch pokovovacích technologií a médií s možnosťou ponorenia zvoleného úseku pása do maskovacieho média po oboch stranách.The invention can be applied to all kinds of coating technologies and media with the possibility of immersing a selected section of the strip into the masking medium on both sides.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS845116A CS242513B1 (en) | 1984-07-02 | 1984-07-02 | Apparatus for treatment of unilateral metal coating of a steel sheet belt namely by zinc in continuous link |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CS845116A CS242513B1 (en) | 1984-07-02 | 1984-07-02 | Apparatus for treatment of unilateral metal coating of a steel sheet belt namely by zinc in continuous link |
Publications (2)
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CS511684A1 CS511684A1 (en) | 1985-08-15 |
CS242513B1 true CS242513B1 (en) | 1986-05-15 |
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CS845116A CS242513B1 (en) | 1984-07-02 | 1984-07-02 | Apparatus for treatment of unilateral metal coating of a steel sheet belt namely by zinc in continuous link |
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1984
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