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Spraying method of semitrailer body

A technology for semi-trailers and car bodies, which is applied to coatings, devices for coating liquids on surfaces, and surface pretreatment. The effect of covering performance and improving adhesion

Active Publication Date: 2018-12-14
石家庄金丰专用车有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, before sandblasting and rust removal, the loose old paint and massive rust on the surface of the substrate must be removed manually with an air-pressure chisel or a hard metal scraper, which is cumbersome to operate; and during the sandblasting process, sand and soil are flying, causing harm to the environment and operators. certain hazard

Method used

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  • Spraying method of semitrailer body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A spraying method for a semi-trailer body, comprising the following steps:

[0046](1) Spraying and derusting of the substrate: Dilute the above-mentioned modified derusting agent with pure water into a derusting solution with a mass content of 10%, and then wash and derust the substrate;

[0047] (2) Mortar blasting and derusting of the substrate: wet spraying is used to treat the surface of the substrate, ATMP is added to the spraying mortar, and the weight ratio of ATMP and mortar is controlled to be 1:150; the rusting of the blasting mortar is controlled to Sa2.5 level;

[0048] (3) Water washing: spray pure water on the surface of the substrate, the injection pressure of pure water is 700bar, so that no rust adheres to the surface of the substrate;

[0049] (4) Painting: Dry the washed substrate to ensure that the surface temperature of the substrate is 5-30°C higher than the dew point temperature, control the relative humidity of the spraying environment to be les...

Embodiment 2

[0052] The spraying method of embodiment 2 and embodiment 1, difference is:

[0053] (1) Rust removal by spraying on the substrate: Dilute the modified rust remover with purified water into a rust removal solution with a mass content of 10%, and then wash and remove rust from the substrate;

[0054] (2) Mortar blasting and derusting of the substrate: wet spraying is used to treat the surface of the substrate, PBTCA and EDTMP are added to the spraying mortar, and the weight ratio of PBTCA and EDTMP to the mortar is controlled to be 1:200; the ratio of PBTCA and EDTMP is arbitrary ; Control blasting mortar to derust to Sa2.5 level;

[0055] (3) Water washing: Spray pure water on the surface of the substrate, the injection pressure of pure water is 800bar, so that no rust adheres to the surface of the substrate.

Embodiment 3

[0057] The spraying method of embodiment 3 and embodiment 1, difference is:

[0058] (1) Spray rust removal of the substrate: Dilute the modified rust remover three-purpose pure water into a rust removal solution with a mass content of 10%, and wash and remove the rust on the substrate;

[0059] (2) Mortar blasting and derusting of the substrate: wet spraying is used to treat the surface of the substrate, HPAA is added to the spraying mortar, and the weight ratio of HPAA and mortar is controlled to be 1:160; the rusting of the blasting mortar is controlled to Sa2.5 level;

[0060] (3) Water washing: Spray pure water on the surface of the substrate, the injection pressure of pure water is 900bar, so that no rust adheres to the surface of the substrate.

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Abstract

The invention relates to the technical field of semitrailer production and processing, in particular to a spraying method of a semitrailer body. The spraying method comprises the following steps of 1)spraying and rust removal of a substrate; 2) derusting of spraying mortar of the substrate; 3) washing; 4) spraying; and 5) drying. In the step 1), washing and derusting are carried out on the substrate by using a modified rust remover solution; in the step 2), the surface of the substrate is treated by adopting a wet spraying process, and a corrosion inhibitor is added into the spraying mortar;in the step 3), pure water is sprayed to the surface of the substrate, so that rust-free objects on the surface of the substrate are attached and adhered; in the step 4), the washed substrate is dried, so that the surface temperature of the substrate is ensured to be higher of 5-30 DEG C than the dew point temperature, and the surface of the substrate is uniformly sprayed; and in the step 5), thesprayed finish paint is dried, and after the finish paint is naturally cooled, spraying is completed. The surface and the inner corrosion of the substrate are thoroughly cleaned through three-time rust removal operation, the rust removal effect is good, and the adhesive force of a paint film is improved.

Description

technical field [0001] The invention relates to the technical field of semi-trailer production and processing, in particular to a spraying method for a semi-trailer body. Background technique [0002] A semi-trailer is a trailer whose axle is positioned behind the vehicle's center of gravity (when the vehicle is evenly loaded) and is fitted with a hitch that transmits horizontal and vertical forces to the tractor. The semi-trailer is generally a three-axle semi-trailer, and its types are divided into 11-meter warehouse semi-trailer, 13-meter warehouse semi-trailer, low-bed semi-trailer and many other types. Transport means of transport. [0003] As we all know, the semi-trailer body is made of metal, and if the metal is not surface-treated, it is easily corroded by the external environment, which will reduce the local strength of the body, affect the life of the semi-trailer, and seriously cause traffic accidents. In the prior art, in order to prevent corrosion, a stable o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/14B05D3/10C23G1/06C23G1/08
CPCB05D3/102B05D7/14B05D2350/35C23G1/066C23G1/088
Inventor 张成泽
Owner 石家庄金丰专用车有限公司