CS230293B1

CS230293B1 - Apparatus for uniforming winthwise thickness of liquid coatings on webs

Info

Publication number: CS230293B1
Application number: CS828857A
Authority: CS
Inventors: Gabriel Belyus; Anton Hlavacik; Jaroslav Jirasek
Original assignee: Gabriel Belyus; Anton Hlavacik; Jaroslav Jirasek
Priority date: 1982-12-08
Filing date: 1982-12-08
Publication date: 1984-08-13

Description

Vynález sa týká zariadenia pre zrovnomernenie hrábky povlakov po šírke pása v procese nanášania tekutých povlakov najmá antikoróznych kovov a lakov na zušlechťovacích linkách, na ktorých je ovláda.nie hrůbky povlakov realizované prostredníctvom pneumatického ofukovania tekutého povlaku najčastejšie ochranného materiálu štrbinovými dýzami.BACKGROUND OF THE INVENTION The present invention relates to a device for straightening a rake of coatings along a strip width in the process of applying liquid coatings, in particular anticorrosive metals and varnishes on refining lines, on which the coating depth is controlled by pneumatic blowing of the liquid coating.

Pneumatický sposob ovládania hrubky tekutých povlakov má v porovnaní s klasickým spósobom, kde hrúbka povlakov je ovládaná vefkostou medzery medzi dvoma přítlačnými valcami, výhody vo vyššej čistotě naneseného povlaku, v možnosti nanášanie tzv. diíerenciálnych povlakov ako aj realizácie automatické]' regulácie hrůbky povlakov individuálnou změnou tlaku vzduchu v ofukovacích dýzach. Jedinou výraznou nevýhodou pneumatického ovládania hrůbky nanášených tekutých povlakov je zhoršená rovnoměrnost ich hrůbky po šírke pása, na oboch stranách, oboch krajoch pása, či zapříčiňuje zvýšenie mernej spotřeby nanášaného ochranného materiálu, zníženie kvality zuštachtených pásov ako aj zníženie výkonu zuštachtovacej linky z titulu zvýšenia ťažkosti pri navíjaní zušlachtenétio pása do zvitKu. Příčina vzniku nerovnoměrnosti hrůbky povlakov po šírkeThe pneumatic method of controlling the thickness of the liquid coatings has the advantages in the higher purity of the applied coating in comparison with the classical method, where the thickness of the coatings is controlled by the size of the gap between the two pressure rollers. as well as the realization of automatic coating depth control by individually varying the air pressure in the blower nozzles. The only significant disadvantage of the pneumatic depth control of the applied liquid coatings is the impaired uniformity of their depth across the width of the strip, on both sides, on both edges of the strip, winding the tempered belt into the coil. Cause of unevenness of the coating thickness across the width

X pása spočívá v tom, že v priestoroch mimo okrajov pása, v úrovni štrbinových dýz sa stretávajú skoro protibežné prúdnice prúdiaceho vzduchu z oboch protilehlých štrbín, čím vzniká v týchto priestoroch chaotické, turbulentně prúdenie, ktoré mežiadúco deformuje tvar tlakového pol'a tak, že hrúbka povlaku na oboch stranách nežiadúco narastá smerom k okrajom pása. Existuje viacero zariadení pre zlepšenie rovnoměrnosti hrůbky povlakov po šírke pása. Známe riešenie podl'a AO č. 199 991 zabezpečuje zlepšenie rovnoměrnosti povlaku po šírke pása vhodným tvarováním ostria pneumatického noža oboch dýz prostredníctvom tzv. ejektovaných dýz. Ďalšie zariadenia pre zlepšenie rovnoměrnosti hrůbky povlaku po šírke pása tvarovaného tlakového pol'a ofukovacích dýz prostredníctvom změny «rozměru štrbiiny dýzy po jej dížke, resp. změnou vzdialenosti dýz od povrchu pása, májů s vyššie uvedeným riešením podl'a AO jednu společnú vlastnost, že iba čistočne kompenzujú následky příčiny vzniku nerovnoměrnosti a vyžadujú potřebu změny tvarovania tlakového póla po šírke pása pri výraznej zmene rýchlosti pohybu pása a hlavně pri zmene jeho šířky. Ďalšie, v praxi vyskúšané zariadenia pre zrotvnomernenie hrůbky povlaku po šírke pása posunu230293 ' 3 tím jednej z dýz vo vertikálnem smere; o niekolko centimetrov sice odstraní· vznik nežiadúcich turbulentných tlakových polí,' avšak spósobuje prefukovanie nanášanej, tekutiny na okraje na jednej straně pása.The waistband X is that near the edges of the waistband, at the level of the slit nozzles, nearly opposing streamers of flowing air from both opposing slots meet, creating a chaotic, turbulent flow in these spaces, which in turn distorts the shape of the pressure field so that the coating thickness on both sides undesirably increases towards the edges of the strip. There are a number of devices for improving the uniformity of coating depth across the width of the belt. The known solution according to AO no. 199 991 provides an improvement in uniformity of the coating over the width of the strip by suitably shaping the cutting edge of the pneumatic knife of the two nozzles by means of the so-called " ejected nozzles. Other devices for improving the uniformity of the coating depth over the strip width of the molded pressure field of the blower nozzles by changing the dimension of the nozzle slit over its length or length, respectively. by changing the distance of the nozzles from the surface of the strip, the may with the above mentioned solution according to AO one common feature that they only purely compensate the consequences of the cause of unevenness and require the need to change the shape of the pressure pole . Other equipment tested in practice for anchoring the depth of the coating along the width of the displacement band 230293-3 by a team of one of the nozzles in the vertical direction; by a few centimeters, while avoiding the formation of undesirable turbulent pressure fields, it causes the purging of the applied fluid on the edges on one side of the belt.

Nedostatky vyššie uvedených zariadení pre zlepšenia rovnoměrnosti hrůbky povlaku po šírke pása odstraňuje zariadenie pre zrovnomernenie hrůbky povlakov po šírke pása v procese nanášania tekutých povlakov podlá vynálezu. Na nosnej konštrukcii pneumatických olukovacich dýz sú umiestnené ručně presúvatelné držiaky, ktoré presúva obsluha linky pri výrazných změnách šířky pása. Na držiakoch sú upevněné závěsné retiazky, na ktorých visia dva cloniace plechy v priestore medzi ofukovacími dýzami, tesne při oboch okrajoch dohora sa pohybujúceho pása, nad hladinou nanášanej tekutiny. Cloniace plechy sa dotýkajú oboch hrán pása dotykovými tyčkami, vyrobenými z nerezavej ocele. Medzera medzi cloniacimi plechmi a hranami pása je určená šířkou dotykovéj tyčky a vdaka závěsnému systému je táto medzera ako aj rovnoběžnosť hrán plechov a pása zachovaná a] pri změnách polohy pása pozdíž dýz, alebo pri nevýrazných změnách šířky pása. Dížka cloniacich plechov v horizontálnom smere určuje vzdialenosť, o ktorú sa přesunů nežiadúce vířivé tlakové polia od oboch okrajov pása. Pružné sttlediace diráty na oboch cloniacich plechoch zaisťujú, že vnútorné, zvislé hrany oboch clon sú vždy v střede medzi štrbinovými dýzami, teda v rovině pása.The drawbacks of the aforementioned devices for improving the uniformity of the coating depth across the width of the strip are eliminated by the device for the uniformization of the coating depth across the width of the belt in the process of applying the liquid coatings according to the invention. Manually movable holders are placed on the supporting structure of pneumatic lancing nozzles, which are moved by the operator of the line in case of significant changes in the belt width. Hanging chains are fastened to the holders, on which two screen plates hang in the space between the blowing nozzles, just at both edges of the upwardly moving strip, above the surface of the liquid to be applied. The screen plates touch both sides of the belt with stainless steel contact bars. The gap between the screening plates and the edges of the strip is determined by the width of the touch bar and, due to the suspension system, this gap as well as the parallelism of the edges of the plates and the strip are maintained. The length of the screening plates in the horizontal direction determines the distance by which undesired swirling pressure fields move from both edges of the strip. The flexible screening wires on both screening plates ensure that the inner, vertical edges of both screens are always in the middle between the slot nozzles, i.e. in the plane of the strip.

Výhody vynálezu spočívajú v tom, že pri minimálnych realižačných a prevádzkových nákladoch sa dosahuje maximálně zrovnomernenie hrůbky povlakov na oboch stranách pása, čo sa prejaví vo zvýšení kvality) výroby,, úspory nanášaného materiálu ako aj zvýšenia výkonu zušlachťovacej linky. Ná»· roky na obsluhu linky·, resp. prevádzkovú údržbu sú' taktiež minimálně a energetická náročnost prevádzkovania tohoto zariadenia je nulová.Advantages of the invention are that the minimum coating and operating costs achieve a maximum leveling of the coating depth on both sides of the strip, which results in an increase in the quality of production, savings in deposited material and an increase in the refining line performance. Line service requests, resp. operational maintenance is also minimal and the energy consumption of the operation of this device is zero.

Obrázková příloha přihlášky vynálezu je tvořená, dvorní výkresmi. Na. obr. 1 je znázorněné zariadenie pro zrovnomernenie hrůbky povlaku po šírke pása. Na obr; 2 je znázorněné provedenie cloniaceho plfechu.The appendix to the application is made up of drawings. On the. Fig. 1 shows a device for leveling the depth of the coating over the width of the strip. FIG. 2 shows an embodiment of the screening sheet.

Pás 10, ktorý vychádza z nádoby, v ktorej je nanášený materiál 20 například roztopený zinok, farbaj. prechádža medži dvorná ofukovacími štrbinovými dýzami 30 a cez nosnú konštrukciu 40 ofukovacích dýz 30. Na nosnej konštrukcii 40 ofukovacích dýz 30 sú po oboch stranách pása položené dva presúvatelné držiaky 50, ktoré obsluha linky presúva ručně podlá potřeby prostredníctvom tyči 55 premiestnenia.The strip 10 which emerges from the container in which the applied material 20 is, for example, molten zinc, is colored. The support structure 40 of the blower nozzles 30 has two movable holders 50 on both sides of the belt, which the operator of the line moves manually as needed by means of the displacement rod 55.

Na držiaku 50 sú na troch retiazkach BO zavesené cloniace plechy 70, v. priestore medzi¹ oboma’ ofukovacími dýzami 30, nad hladinou nanášanej tekutiny 20. Na jednej zo zvislých hrán cloniacich plechov 70 sú navařené dotykové tyčky 72, ktoré sa dotýkajú jednotlivých hrán pása 10, pričom vzdialenosť medzi pásom 10 a cloniacimi plechmi 70 je určená hrúbkou dotykovéj týčky 72.’ Stredlace dráty 74 zaisťujú, aby cloniace plechy 70 ležali přibližné v rovině pása 10.Shielding plates 70, h. the space between the two ¹ "blowing nozzles 30, the liquid applied on the surface 20 on one of the vertical edges of the gate plates 70 are welded to the contact rod 72, which contact each edge of the strip 10, the distance between the belt 10 and the cloniacimi plates 70 is determined by the thickness of the touch ticks 72. ' The centering wires 74 ensure that the screen plates 70 lie approximately in the plane of the belt 10.

Predmet tohoto vynálezu je možné využiť vo všetkých kontinuálnych výrobných procesoch, kde sa jedná o nanášanle tekutého povlaku na pás za. předpokladu, že hrúbka povlaku. je ovládaná¹ pneumatickými) ofukovacími! dýzami.The present invention can be used in all continuous manufacturing processes involving the application of a liquid coating onto a web. provided the thickness of the coating. is controlled by ¹ pneumatic) blower! nozzles.

Claims

230293 '3 by one of the nozzles in the vertical direction) will remove a few centimeters. However, this causes turbulent pressure fields to arise, but causes the coating to be blown onto the edges on one side of the belt. The drawbacks of the aforementioned devices in order to improve the uniformity of the ridge of the coating over the width of the strip are eliminated by the device of leveling the ridge of the coatings to the width of the coating process according to the invention. Hand-held, movable holders are placed on the load-bearing pneumatic blowing nozzles, which are the operator of the line when the belt width changes significantly. Retaining chains are attached to the holders, on which two plating plates hang in the space between the blow-offs, just at both edges, up to the level of the moving belt, above the level of the applied fluid. The shielding plates contact the two edges of the strip with the contact rods made of stainless steel. The gap between the shielding plates and the strip edges is determined by the width of the contact rod, and due to the suspension system, this gap as well as the parallelism of the sheet metal and strip edges is maintained even when the belt position changes, or when the width of the strip is faint. The lattice of the shielding sheets in the horizontal direction determines the distance by which the undesired swirl pressure pressure beams are displaced by the two edges of the belt. The flexible central dies on both shielding sheets ensure that the inner, vertical edges of the two apertures are always centered between the slotted nozzles, i.e. in the plane of the web. The advantages of the invention are that the primary realization and operating costs are achieved by maximizing the thickness of the coatings on both sides of the strip, which results in an increase in production quality, saving of the applied material as well as increasing the refining line performance. Years of operating the line, respectively. operation maintenance is also minimal, and the power of operation of this device is zero. An image attachment of the invention is formed by two drawings. On. Fig. 1 is a view showing a device for smoothing the coating over the width of the strip. FIG. 2 shows an embodiment of the screening plate. The belt 10 which emerges from the container in which the deposited material 20 is, for example, zinc melted. passes through the double-sided nozzle nozzles 30 and the supporting structure 40 of the nozzles 30. On the support structure 40 of the blower nozzles 30, two transferable holders 50 are placed on both sides of the belt, which are moved by the operator of the line by hand over the needles through the displacement rod 55. On the bracket 50, on the three chains 60, there are curtains 70, v-compartments 1 with both blowing nozzles 30, superimposed on the applied fluid 20. On one of the vertical edges of the shielding plates 70, the contact rod 72, which is in contact with the individual edges of the strip 10, is located while the distance between the belt 10 and the screening plates 70 is determined by the thickness of the contact rod 72. The centering wires 74 ensure that the plating plates 70 lie approximately in the plane of the belt 10. The present invention can be used in all continuous manufacturing processes where the liquid coating is applied to the belt. assuming that the horror of the vivulum. it is controlled by 1 pneumatic! of forging! nozzles. PR ED MET Device for leveling the crests of the coatings along the width of the strip in the process of application of liquid coatings with blowing nozzles with horizontal slots, characterized in that twin-roll plates (70) are suspended between the blowing nozzles (30) at their overlap at the edges of the strip (10), wherein the edge distance of the sheet metal strip (10) from the edge of the sheet blanking sheet (70) is defined by the thickness of the tangles (72), the sheet metal plates (.70) being contacted by the flexible centering wires. (74) the inner edges of the slots of the blow nozzles (30) and at the same time are suspended on the hinge chains (60) which are fastened to the holders (50) with the displacement (55), the holder (50) being positioned on the supporting structure (40) of the blow nozzles (30).

2 sheets of drawings