Preparation method for television back plate simple in process and good in anti-rust effect

Abstract

The invention relates to the technical field of television back plate machining, in particular to a preparation method for a television back plate simple in process and good in anti-rust effect. The preparation method comprises the following steps that a, dust removal is performed on the surface of a cold-rolled plate, and then drying is performed; b, anti-rust paint is uniformly sprayed on one side face of the cold-rolled plate; c, punch forming is performed on the cold-rolled plate to obtain a formed television back plate; d, paint drying treatment is performed on the outer side face of thetelevision back plate; e, a conductive region on the outer side face of the television back plate is cleaned firstly, then covering protection is performed on the periphery of the conductive region, then conductive paint is sprayed to the conductive region, and drying is performed to obtain a finished product of the television back plate. According to the preparation method, the zinc plating process is omitted, the production working procedure is greatly simplified, so that the production cost is reduced by about 10%, meanwhile, the anti-rust effect and the conductive performance of the television back plate can be ensured, and the problem that in the prior art, a punch notch located at the edge of the lower end of the television back plate is prone to oxidization and rusting is solved.

Description

technical field [0001] The invention relates to the technical field of TV backboard processing, in particular to a preparation method of a TV backboard with simple process and good antirust effect. Background technique [0002] The backplane is the basic frame that carries the LCD screen and LCD TV equipment. The LCD screen, motherboard, light bar and power supply are all installed on the backplane. At present, the production process of the TV backplane is to process the cold-rolled sheet with a galvanizing process (electro-galvanized / hot-dip galvanized) first to obtain a galvanized sheet (electro-galvanized sheet / hot-dip galvanized sheet), then stamping and forming, and finally on the backplane The outer surface is painted to beautify the appearance to obtain the finished product. The reason why the prior art adopts the galvanizing process to pretreat the cold-rolled sheet is mainly to prevent rust. The galvanized sheet has excellent anti-rust performance, good electrical ...

AI Technical Summary

Problems solved by technology

However, the galvanizing process also brings many problems: 1) The galvanizing process is complicated, including multiple steps such as degreasing and degreasing, water washing, pickling, electrolysis, drying, passivation, etc., and the cost is high, especially the quality control of the hot-dip galvanized surface Difficult, easy to dezincification during stamping, galvanized layer has mottled, matte gray and other shortcomings, and the unprotected stamping incision is easy to oxidize and rust, which seriously affects the appearance quality of the product; 2) Galvanizing is a heavy polluting industry, The degreasing agent used in the galvanizing process, the cleaning agent and the additives used in the electroplating solution all contain a large amount of toxic and harmful materials, which not only endanger human health but also cause environmental pollution; 3) galvanizing is galvanized on both sides of the back plate, which makes Galvanizing on the outer side of the backsheet after subsequent varnishing causes waste

Although the simple anti-rust treatment method of spraying anti-rust paint has been used in the metal industry, there are irreplaceable reasons for the use of galvanized sheets for the TV back panel industry: 1) Some parts of the outer surface of the TV back panel have Conductive requirements such as figure 1 As shown, the area shown in B in the figure is the conductive area where the convex hole is located. These positions must ensure electrical conductivity. Simply spraying anti-rust paint without using galvanized sheets will affect the electrical conductivity of these areas; 2) plating Zinc plate has good welding performance, and some TV backplanes need to weld brackets on the inside

The above are the main reasons why galvanized sheets have been used in the production process of TV backplanes and cannot be replaced by other antirust processes.

Therefore, the inertial idea of ​​the existing technology is still to continue to use galvanized sheets, to improve and optimize the existing galvanized process or other production links of the back sheet, but this method is ineffective in improving production efficiency, controlling costs and reducing pollution. very little room for improvement

[0004] In addition, if figure 1 As shown, in the existing process, when the outer surface of the backplane is baked at the end, a blister box will be used to cover the area shown in A in the figure (that is, area A includes conductive area B and other areas that need to install power boards, main boards and adapters) board and other parts), remove the blister box after spraying paint, although this step can play a protective role to avoid spraying paint from affecting the conductivity of area A, but the area covered by area A is too large, in fact only area B is It is necessary to ensure electrical conductivity, which will cause the stamping cuts located at the lower edge of the covered area A to be unable to be painted, and these parts are therefore prone to oxidation and rust

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