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Method for preventing automobile bumper surface from blister

A technology for automobile bumpers and bumpers, which is applied to the device for coating liquid on the surface, special surfaces, coatings, etc., which can solve problems affecting surface quality, improve quality and service life, and reduce foaming.

Inactive Publication Date: 2013-09-11
HEFEI CHANGAN AUTOMOBILE
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The car bumper is a plastic material part. After a period of use, many blisters will appear on the surface, which looks like prickly heat and affects the surface quality

Method used

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Examples

Experimental program
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Embodiment Construction

[0014] A method for avoiding foaming on the surface of the automobile bumper, the specific steps of the method are as follows:

[0015] (1) Pre-treatment, using industrial alcohol as a solvent to remove surface oil, inorganic salts and release agents and other factors that affect performance;

[0016] (2) Degreasing, using high-pressure water washing for degreasing treatment, using alkaline solution or organic solvent to remove oil on the surface of metal workpieces by saponification, emulsification or soaking and dissolution;

[0017] (3) Drying treatment, when the temperature of the bumper is 100-200°C, the best baking time is 15-35 minutes;

[0018] (4) Electrostatic dust removal, plastic is a bad conductor, it is easy to generate static electricity and absorb dust, use ionized air for dust removal, that is, compressed air passes through high-pressure nozzles, uses corona discharge to ionize the air, and the ionized air is blown to the surface of the plastic to neutral...

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PUM

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Abstract

The invention discloses a method for preventing an automobile bumper surface from blister, and is characterized in that specific steps of the method comprise: pre-processing, degreasing, drying, electrostatic dedusting, modification process and spraying. With the method, the blistering phenomenon of an automobile bumper is effectively reduced after a period of use, and the quality and the service life of products are improved.

Description

technical field [0001] The invention relates to a method for avoiding foaming on the surface of an automobile bumper. Background technique [0002] Injection molded products have always occupied a very important position in the plastics industry, especially in recent years with the vigorous development of the automobile industry, the application of injection molded parts in the automobile industry has become more and more extensive. Since the geometry of auto parts is generally relatively complex, in order to ensure the rheological properties of the material and the surface quality of the product, different parts of the same part have different requirements for the flow rate (or pressure) of the melt filling mold during the molding process. When the screw pushes the melt to the mold, it is required to control the process parameters such as different injection rates (or injection pressure) at different positions. This control process is called multi-stage injection molding....

Claims

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Application Information

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IPC IPC(8): B29C59/10B29C59/08B29C71/00B05D5/06
Inventor 黄瑛王强
Owner HEFEI CHANGAN AUTOMOBILE
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