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Air knife for controlling zinc coat thickness

A technology of galvanized layer and air knife, applied in coating, hot-dip plating process, metal material coating process, etc., can solve the problems of limited edge thickness suppression and difficulty in overcoming the edge thickness of the coating, and achieve the suppression of edge thickness defects , easy to adjust the effect

Inactive Publication Date: 2007-03-14
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] In the original hot-dip galvanized strip steel production line, the orthographic projection of the air knife gap is a slender rectangle (as shown in Figure 2). thicker than the middle
Therefore, the above-mentioned technical measures, which are mainly characterized by increasing the air flow and injection pressure at the edge, have a very limited inhibitory effect on the edge thickness. is still inevitable

Method used

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  • Air knife for controlling zinc coat thickness
  • Air knife for controlling zinc coat thickness
  • Air knife for controlling zinc coat thickness

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] With reference to Fig. 6, the air knife used for controlling the thickness of the galvanized layer in the present invention includes an air knife body 20 and an upper knife lip 11 and a lower knife lip 12 installed and fixed thereon, and the front ends of the upper knife lip 11 and the lower knife lip 12 Air knife slits 13 are formed at longitudinal intervals. Referring to FIG. 5 , the orthographic projection of the air knife slit 13 is in the shape of a parabola. Since the orthographic projection of the air knife slit 13 is parabolic, the air flow ejected through the air knife slit 13 can evenly act on the surface of the strip along the entire length of the zinc liquid solidification line, so it can effectively suppress the hot-dip galvanized sheet edge. Generation of thick defects.

[0022] In order to adjust the shape of the air knife gap to...

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PUM

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Abstract

The present invention discloses one kind of air knife for controlling galvanized coating thickness, and the air knife can inhibit side thickness fault of hot galvanized plate effectively. The air knife includes one air knife body, one upper knife lip and one lower knife lip fixed onto the air knife body and forming in the front ends one longitudinal air knife gap in a parabolic orthographic projection. The present invention is superior in that the air knife gap can spray airflow acting homogeneously to the surface of the band steel in the whole length of the zinc solution solidifying line to inhibit side thickness fault of hot galvanized plate effectively, and that the air knife gap has conveniently adjustable parabolic profile for fitting different sizes of hot galvanized plate.

Description

technical field [0001] The invention relates to an air knife used for controlling the thickness of galvanized layer in a hot-dip galvanized steel strip production line. Background technique [0002] On the hot-dip galvanized strip steel production line, air knives are used to control the thickness of the galvanized layer of the strip steel, that is, a set of corresponding air knives are set on the front and rear surfaces of the strip steel, and compressed air is delivered to the air knife during the production process. Air, compressed air is ejected through the slit-shaped nozzle of the air knife to form a continuous flat airflow. Before the molten zinc brought out by the strip steel from the zinc pot solidifies, the airflow scrapes the excess zinc liquid back to the zinc pot like a knife edge. , so that the thickness of the galvanized layer can be controlled. The amount of zinc scraping is proportional to the square of air flow, air knife injection pressure and air knife g...

Claims

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Application Information

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IPC IPC(8): C23C2/16C23C2/06C23C2/40
Inventor 郭太雄李纪仁
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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