Precoated metal plate and manufacturing method thereof

Abstract

The invention discloses a precoated metal plate and a manufacturing method thereof. The precoated metal plate sequentially comprises a metal substrate, a solvent type coating and a second UV (Ultraviolet) coating from bottom to top, or sequentially comprises the metal substrate, the solvent type coating, a first UV coating, a transfer printing pattern and the second UV coating from bottom to top. The manufacturing method comprises the following steps: enabling a metal coiled tape with the solvent type coating to sequentially enter an uncoiling procedure I, a surface cleaning procedure II, a first UV glue coating procedure III, a transfer printing membrane laminating procedure IV, a first ultraviolet light curing procedure V and a transfer printing membrane tearing procedure VI, wherein the transfer printing membrane laminating procedure IV adopts an unpatterned transparent transfer printing membrane or a plastic transfer printing membrane with a pattern; sequentially entering a second UV glue coating procedure VII, a second ultraviolet light curing procedure VIII, a protective film pasting and covering procedure IX and a coiling procedure X, thus obtaining the precoated metal plate. The invention provides the precoated metal plate with abundant colors, processability and high distinctness; the precoated metal plate has excellent brightness, transparency and mirror surface effect.

Description

technical field [0001] The invention belongs to the technical field of production and manufacturing of metal plates for household appliances, building materials, automobiles and furniture, and in particular relates to a pre-coated metal plate and a manufacturing method thereof. Background technique [0002] There are two methods of pre-painted metal plate coating process, one is the post-coating method of coating after the product sheet metal is formed; the other is to coat the metal plate or metal strip before the sheet metal is formed pre-coating method. The pre-painted metal sheet has good sheet metal forming processability, saves the user's painting process, and helps to improve production efficiency and reduce costs. Pre-painted metal sheets are more and more widely used in the fields of home appliances, construction and automobiles, and the demand for artistic appearance with high brightness and rich appearance patterns is also increasing. However, the ordinary pre-c...

AI Technical Summary

Problems solved by technology

The use of varnish spraying process requires the use of spray guns to spray paint, which is wasteful, and there will be a lot of varnish and solvent pollution in the environment, and it needs a long oven for high temperature baking, and the production efficiency is low.

The varnish flow coating process is used, the process is complicated and the yield rate is low, and the coating thickness of the flow coating equipment is generally greater than 30 μm, resulting in a high degree of surface clarity, but the processing performance of the coating is not good, and the metal plate is bent and stretched. Coating Cracking Defect Appears

The metal plate filming process generally adopts PET / PVC composite film process, but the cost of high-quality composite color film is very high, and it is easy to produce orange peel during the film covering process, which has a great impact on the vividness of the film layer.

The orange peel pattern of the coated metal plate is greatly affected by technical parameters such as the roughness of the substrate, the heat resistance of the PVC film, and the pressure of the coating, and it is difficult to control

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