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Evaluation method for water-based paint pollution of automobile body chain lubricating oil on site

A ground chain lubricating oil and water-based coating technology, which is applied in the direction of measuring devices, analyzing materials, and material analysis through optical means, can solve problems such as shrinkage cavities, car body pollution, and dents, and achieve the effect of avoiding dents and shrinkage cavities

Active Publication Date: 2018-03-20
LANGFANG NIPPON PAINT
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  • Summary
  • Abstract
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Problems solved by technology

The possible reason is that during on-site painting, the ground chain lubricating oil or ground chain grease in the workshop pollutes the car body during the preheating and high-temperature baking process, resulting in depressions and shrinkage cavities when the topcoat is sprayed on the car body
This is because during operation, the staff simply rely on experience to select the ground chain lubricating oil, and there is no qualitative judgment on whether it will affect the coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] A method for evaluating the pollution of car body water-based paint by ground chain lubricating oil on the scene of automobile painting, comprising the following steps:

[0036] 1) Evaluate the volatilization rate of different ground chain lubricating oils, including the following steps:

[0037] Weigh the weight of the aluminum foil and count it as W1;

[0038] Add the ground chain lubricating oil to the aluminum foil, measure the total weight of the two, and calculate it as W2;

[0039] Heat the aluminum foil with ground chain lubricating oil at 80°C for 4 hours, and then at 140°C for 4 hours;

[0040] Measure the total weight of the two after heating, count as W3;

[0041] Calculate the volatility rate A: A=(W2-W3) / (W2-W1);

[0042] Ground chain lubricating oil with a volatilization rate exceeding 2% is unqualified and eliminated, and the rest is primary qualified ground chain lubricating oil;

[0043] 2) Evaluate the anti-steam performance of the water-based coa...

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PUM

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Abstract

The invention discloses a method for evaluating the pollution of ground lubricating oil to car body water-based paint on the automobile painting site. By evaluating the volatilization rate of different ground lubricating oils, the ground lubricating oil with high volatility is eliminated, and a qualified ground chain is obtained. Lubricating oil: Evaluate the steam resistance performance of the water-based paint on the body to the primary qualified chain lubricating oil during the evaporation process, eliminate the primary qualified chain lubricating oil that will cause depressions or shrinkage cavities, and obtain the secondary qualified chain lubricating oil; Evaluate the anti-dripping and splashing performance of water-based paint for car body to the secondary qualified chain lubricating oil. The invention comprehensively evaluates the pollution ability of the ground chain lubricating oil in the automobile painting workshop to the paint of the whole vehicle body through the progressive test means layer by layer.

Description

technical field [0001] The invention relates to an evaluation method for the pollution of the water-based paint of the car body by the chain lubricating oil on the automobile painting site. Background technique [0002] Recently, an automobile factory reported that there will be depressions and shrinkage cavities when the topcoat is sprayed on the car body. The possible reason is that during on-site painting, the ground chain lubricating oil or ground chain grease in the workshop pollutes the car body during the preheating and high-temperature baking process, resulting in depressions and shrinkage cavities when the topcoat is sprayed on the car body . This is because during operation, the staff purely rely on experience to select ground chain lubricating oil, and have no qualitative judgment on whether it will affect the coating. [0003] Therefore, it is necessary to provide a method for evaluating the pollution performance of automobile painting site lubricating oil to w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04G01N21/84
Inventor 沈辉
Owner LANGFANG NIPPON PAINT
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