Automobile hub spraying technology

A technology of automobile wheel hub and process, which is applied in the direction of coating, polyester coating, and the device for coating liquid on the surface, etc. It can solve the problems of irritating gas emission, insufficient surface hardness, complicated spraying process, etc., and achieves easy operation and attachment Focus on the effect of excellent and simple process

Active Publication Date: 2014-04-30
CHONGQING QICAIHONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating film thickness of traditional paint is 30-40 microns, and the spraying process is relatively complicated; and the surface hardness of traditional paint coatings is not enough, and the flexibility and scratch resistance are far inferior to powder coatings
At the same time, the solvent-based coatings of traditional paints are more harmful to spraying workers, irritating gas emissions, and polluting the air. The actual product utilization rate is only between 50-70%, while the product utilization rate of powder coatings is over 99%. And it can be fully recovered through the recovery system, no solvent, no irritating gas, no dust discharged into the air, in line with environmental protection requirements

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0030] Automobile hub spraying process of the present invention, comprises the following steps:

[0031] Step 1. Degrease and derust the car drum;

[0032] Step 2. Wash the degreased and derusted automobile wheel with water, apply phosphating or passivation film, and then dry and fix;

[0033] Step 3. spraying thermosetting powder coatings with an average particle size of 15-25 microns on the car wheel drum with an electrostatic spray gun;

[0034] Step 4. Put the sprayed car wheel into a bread oven or an assembly line oven for high-temperature curing and baking. The temperature is set at 180-200°C and the time is 35-25 minutes;

[0035] Step 5. After the curing is completed, check the color of the car drum, the metal effect, the adhesion of the coating film, the surface hardness, and the scratch resistance.

[0036] In this embodiment, the thermosetting powder coating adopted comprises the following main components:

[0037] Polyester resin: 60-80%;

[0038] Curing agent:...

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Abstract

An automobile hub spraying technology comprises the steps of step1, performing oil removal and rust removal on automobile hubs; step2, washing the oil and rust removed automobile hubs with water, applying phosphorization or passivation coatings, and performing drying and fixation; step3, spraying thermosetting powder coatings with the average grain size being 15 microns to 25 microns on the automobile hubs through an electrostatic spray gun; step4, performing high-temperature curing baking on the sprayed automobile hubs in a bread oven or an assembly line oven, wherein the temperature is set to be in a range of 180 DEG C to 200 DEG C, and time is in a range of 25 minutes to 30 minutes; step5, checking colors, metal effects and coating adhesive forces, surface hardness, scratching resistance and the like of the automobile hubs after curing and out of the oven.

Description

technical field [0001] The invention relates to a spraying process for automobile wheel hubs, in particular to a process for spraying automobile wheel hubs with thermosetting powder paint. Background technique [0002] At present, automobile wheel drums are generally sprayed with paint. After the surface of the automobile wheel hub is cleaned, it is necessary to apply a primer first, then apply a metallic paint, and finally apply a varnish. High technical requirements. The coating film thickness of traditional paints is 30-40 microns, and the spraying process is relatively complicated; and the surface hardness of traditional paint coatings is not enough, and the flexibility and scratch resistance are far inferior to powder coatings. At the same time, the solvent-based coatings of traditional paints are more harmful to spraying workers, irritating gas emissions, and polluting the air. The actual product utilization rate is only between 50-70%, while the product utilization r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/06B05D3/02C09D167/00C09D7/12C09D5/46
Inventor 宋小阳周光建
Owner CHONGQING QICAIHONG CHEM
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