Top Roller Cloth Sewing Method
A technology of top roll and wrapping cloth, which is applied in the direction of coating, metal material coating process, hot-dip plating process, etc., and can solve the problem of steel strip indentation, thick bonding of top roll wrapping cloth, increasing steel strip, etc. problems, to achieve the effect of reducing the impression of the top roller, high surface quality of the steel plate, and preventing relative sliding
Active Publication Date: 2017-11-28
SHANGHAI DONGXIN METALLURGY TECH ENG
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Problems solved by technology
The disadvantage of this method is: the thickness of the joint of the top roll cloth is relatively thick, and it is easy to leave roll marks when the steel strip passes through the joint, which affects the surface quality of the steel strip; The temperature of the galvanized steel strip is as high as 460°C, and the temperature when it reaches the turning roll at the top of the cooling tower is still 180°C-280°C. Since the buckle itself is not resistant to high temperature, it will easily cause the top roll to loosen after running for a long time. The possibility of scratching the wrapping cloth will also cause indentation on the steel strip, which will reduce the surface quality of the hot-dip galvanized steel sheet and shorten the service life of the top roll wrapping cloth
Method used
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Embodiment 1
[0018] A method for sewing a top roll cloth, comprising laying and straightening a temporary adhesive buckle, sewing and removing the buckle, and the specific steps are:
[0019] flattened, such as figure 1 As shown, the top roll cloth 2 is covered on the roll surface of the top roll 1, and the top roll cloth 2 is woven with aramid fiber: when ether homopolymer fiber is selected, the strength is 4cN / dtex~5cN / dtex , the elongation rate is 5% to 7%, the modulus is 10GPa to 12GPa, the strength retention rate is 50% to 70% after 100 hours at 300°C, the limiting oxygen index is 44, and the radiation resistance is good; when the ketone copolymer fiber is selected, it has Approximately hollow special-shaped section, strength 3.8cN / dtex, elongation 32%, modulus 35cN / dtex, density 1.41g / cm, shrinkage in boiling water and 250°C are less than 0.5% and 1% respectively;
[0020] When straightening, smooth the top roll cloth 2 from the middle to both ends, so that the inner surface of the ...
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Abstract
The invention relates to the field of equipment for keeping the high-tower turning top roller of the strip steel conveying roller of a continuous hot-dip galvanizing unit in an effective state, in particular to a sewing method for wrapping cloth on the top roller. A method for sewing a top roll cloth, which includes laying and straightening, and is characterized in that it also includes temporarily bonding a buckle, sewing and removing the buckle, and when temporarily bonding the buckle, on the top roll cloth (2) Fix at least five pairs of velcro fasteners (3) along the central axis direction of the top roller (1); when sewing, first sew along the generatrix direction of the top roller (1), and then sew in a continuous oblique fold line; when removing the hasp, Remove the velcro (3) from the top roll cloth (2). The invention has the advantages of simple structure, convenient installation, high surface quality of the steel plate and long service life of the top roller wrapping cloth.
Description
technical field [0001] The invention relates to the field of equipment for keeping the high-tower turning top roller of the strip steel conveying roller of a continuous hot-dip galvanizing unit in an effective state, in particular to a sewing method for wrapping cloth on the top roller. Background technique [0002] At present, the production process of hot-dip galvanized steel sheet is: uncoil the steel coil into a steel strip, put the high-temperature molten zinc liquid in the zinc pot, immerse the steel strip downward in the zinc liquid, and the surface of the steel strip passes through the zinc pot. The zinc layer is adhered, and then the steel strip is conveyed upwards to the zinc liquid through the sinking roller also immersed in the zinc liquid. After the steel strip is blown by the air knife, it is vertically conveyed to the high tower and turned to the top roller, and then enters the lower conveying roller table to complete the finishing. , pull straightening or rol...
Claims
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IPC IPC(8): C23C2/40C23C2/06
Inventor 吴伟民王勇
Owner SHANGHAI DONGXIN METALLURGY TECH ENG