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Method for cooling aluminum alloy strip during coating

A technology of aluminum alloy strip and cooling method, which is applied to the coating, the device for coating liquid on the surface, and the surface pretreatment, etc. It can solve the problems that the film layer cannot be cooled in time, affects the surface quality of the coating, and the coating is sticky.

Inactive Publication Date: 2019-11-01
SOUTHWEST ALUMINUM GRP +1
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  • Abstract
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Problems solved by technology

[0002] When the aluminum alloy strip is coated, the temperature of the metal plate is generally around 200-250 degrees, and the film layer cannot be cooled in time, causing the coating to stick to the surface of the backup roll and affecting the surface quality of the coating. Therefore, water cooling is required, but if it is directly Cooling with water, due to the large temperature difference between the water temperature and the metal plate, cooling too fast will cause white spot defects on the surface of the aluminum strip
The current technology is to spray cold water directly on the surface of the coated aluminum strip, and the surface of the coating is prone to white spot defects

Method used

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  • Method for cooling aluminum alloy strip during coating

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Embodiment Construction

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] Please refer to figure 1 , figure 1 A schematic diagram of the cooling of the aluminum alloy strip during coating provided by the embodiment of the present invention.

[0024] The method for cooling the aluminum alloy strip during coating provided by the embodiment of the present invention is to spray the cooling water directly onto ...

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Abstract

The invention discloses a method for cooling an aluminum alloy strip during coating. Cooling water is directly sprayed in a mist-shaped mode onto the surface of the coated aluminum alloy strip to be cooled, the temperature of the cooling water is not less than 40 DEG C, and the hardness is not more than 120 ppm. By spraying the cooling water with the temperature being not less than 40 DEG C and the hardness being not more than 120 ppm in a mist-shaped mode onto the surface of the coated aluminum alloy strip to be cooled, white point defects occurring on the surface of a coating can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy cooling, in particular to a method for cooling an aluminum alloy strip during coating. Background technique [0002] When the aluminum alloy strip is coated, the temperature of the metal plate is generally around 200-250 degrees, and the film layer cannot be cooled in time, causing the coating to stick to the surface of the back-up roll and affecting the surface quality of the coating. Therefore, water cooling is required, but if it is directly Cooling with water, due to the large temperature difference between the water temperature and the metal plate, cooling too fast will cause white spot defects on the surface of the aluminum strip. In the current technology, cold water is directly sprayed on the surface of the coated aluminum strip, and white spot defects are prone to appear on the coating surface. Especially in winter, the lower the water temperature, the greater the temperature diff...

Claims

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Application Information

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IPC IPC(8): B05D3/00
CPCB05D3/007
Inventor 秦富军肖卫
Owner SOUTHWEST ALUMINUM GRP
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