Vehicle paint sagging experiment board and test method

Abstract

The invention provides an automobile paint anti-sagging testing plate which is identical to an automobile steel plate, has a smooth surface, and is processed by electrophoresis; the testing plate is characterized in that a group of holes with the same spacing and the same aperture are arranged on the testing plate from top to bottom; and the dimension design of the aperture and the spacing of the holes is determined according to the length allowable value of the sagging. The invention also provides an automobile paint anti-sagging testing method, comprising the steps as follows: the testing plate is vertically arranged on an injection plate bracket and coated with paint uniformly from top to bottom according to the automobile coating process parameters; the coating is in gradient so as to form different coating thickness from top to bottom; the coating is not stopped till sagging appears in a certain hole and the lower hole edge; drying is carried out according to the paint drying specification; and the dry coating thickness correspondingly from the upper hole edge to the lower hole edge when the sagging appears initially is used for expressing the sagging limit of the paint material. The method approaches the practical construction process, has strong practicability and good operability and can carry out the anti-sagging performance test of different paints.

Description

Technical field [0001] The invention relates to a paint sagging test device and a test method, in particular to an automobile paint sagging resistance test board and a test method. Background technique [0002] Car painting is a high-level industrial painting. During the paint construction process, paint film defects such as sagging and running often appear, especially on the facade, holes, edges and other parts of the car body. Due to the effect of gravity and edge accumulation, It is more prone to problems. Therefore, it is particularly important to detect the anti-sagging performance of paint materials. There are two current testing methods. One is to measure the rheological / thixotropic properties through instruments such as rheometers, which indirectly reflect the sag resistance of the material. The disadvantage of this method is that it requires large investment in instruments and equipment, and the measured physical and chemical index values ​​do not directly correspond to ...

AI Technical Summary

Problems solved by technology

It can effectively measure the sag resistance of automobile paint materials, and can meet the current car painting process. It is fast and simple, provides a reliable reference for paint construction, and solves the problem that the existing test methods are not strong in pertinence.

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