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Tinted spraying technology for automobile body

A car body and body technology, which is applied in coatings, devices for coating liquid on the surface, and surface pretreatment, etc., can solve the problems of high cost of topcoat spraying, low production efficiency, increased energy consumption and labor consumption of coating, etc. , to achieve the effect of reducing the drying process, improving market competitiveness, and improving coating production capacity

Inactive Publication Date: 2012-10-17
郑州日产汽车有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The characteristic of the above-mentioned process is that the process of "topcoat spraying" is carried out after the process of "drying the topcoat". During the drying process, the cost of topcoat spraying is high (the energy consumption and labor consumption of painting can be doubled), and the production efficiency is low

Method used

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  • Tinted spraying technology for automobile body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Applicable to public security vehicles, white paint and blue top paint.

[0017] Such as figure 1 As shown, the over-color spraying process of the car body of the present invention includes the pre-treatment process of the car body, the intermediate coating and over-color topcoat spraying process and the later repair process:

[0018] (1) The preliminary pretreatment process includes:

[0019] The first step is the pretreatment of the body: the body to be sprayed is pre-degreased, degreased, washed, surface adjusted, phosphated,

[0020] Clean with water washing procedure;

[0021] The second step, electrophoresis treatment: the above-mentioned cleaned car body is subjected to cathodic electrophoresis, and then enters the electrophoresis drying oven to dry the car body at 170°C for 20 minutes after washing;

[0022] The third step is to grind, apply glue, and lay the heat insulation pad: use 400#--600# sandpaper to grind the paint film defects on the surface of the car...

Embodiment 2

[0034] Example 2: Suitable for black spraying of pickup truck series windows

[0035] The specific spraying process is the same as the above, in which the gray intermediate paint is used for the intermediate coating, the black topcoat is used for the colored parts, and the yellow topcoat is used for the non-colored parts.

Embodiment 3

[0036] Example 3: Applicable to the silver-gray skirts of pickup series metallic paint

[0037] (1) The preliminary pretreatment process is the same as in Example 1;

[0038] (2) The intermediate coating and over-color topcoat spraying procedures include:

[0039] The first step, the middle coat spraying: spray the gray middle coat paint on the cleaned car body;

[0040] The second step is to spray the top coat: spray the part of the body (the lower end of the front and rear doors, the bottom beam of the front body, the lower end of the rear car side panel, etc.) that is in the wet film state after the first intermediate coat spraying with the colored silver metallic paint , Then flash the car body into the intermediate coating leveling room;

[0041] The third step, drying: Put the flash-dried car body into the intermediate coating drying furnace, and heat it at 140°C for 20 minutes to dry;

[0042] The fourth step, intermediate coating grinding: Use 1000# sandpaper to grind the defect...

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Abstract

The invention discloses a tinted spraying technology of an automobile body. The tinted spraying technology comprises the steps of a procedure of pretreatment on the automobile body at an early stage, a procedure of floating coat and tinted finish spraying at a middle stage and a repair procedure at a later stage, wherein the 'tinted finish drying' procedure in the prior art is eliminated in the floating coat and tinted finish spraying procedure at the middle stage; the spraying of tinted finish is adjusted to be performed after 'the floating coat spraying' instead of after the 'finish drying' in the prior art; and the tinted finish as well as a floating coat film is changed into wet-to-wet spraying and is dried in a floating coat drying furnace, so that the procedure special for drying the tinted finish in the prior art is eliminated. According to the invention, on the premise of guaranteeing the long-term performance of weather resistance, gloss, distinctness of image, corrosion resistance and the like, and physical and chemical performance indexes to be equal to the automobile body performance indexes of the original spraying technology, the heating energy consumption and labor consumption of a coating and assembling line are saved, thereby achieving the aims of improving the coating and assembling production capability, lowering the manufacturing cost, and improving the market competitiveness of automobile products.

Description

Technical field [0001] The invention relates to the technical field of automobile painting, in particular to a color-casting spraying process for automobile bodies. Background technique [0002] Under normal circumstances, the color coating process of the car body is carried out in accordance with the following procedures: pretreatment, electrophoresis, electrophoresis drying, electrophoresis grinding, gluing, laying of thermal insulation damping pads, intermediate coating spraying, intermediate coating drying, Intermediate coating grinding, top coating spraying, top coating drying, masking, top coating grinding, top coating spraying, de-masking, top coating drying, repairing, etc. The characteristic of the above process is that the "top coat spraying" process is carried out after the "top coat drying" process, which is the so-called "dry-on-wet" process, which is processed according to the above process. The intermediate coat and the top coat need to be sprayed three times and t...

Claims

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Application Information

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IPC IPC(8): B05D7/16B05D3/02
Inventor 朱玉萍牛新时王海燕许朋辉张亚璞
Owner 郑州日产汽车有限公司
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