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Method for testing ball falling impact resistant performance of coating

A technology of impact performance and test method, which is applied in the field of testing the impact resistance of coatings to falling balls, which can solve the problems of paint film peeling, chipping damage, bumping and falling, paint film coating wear and tear on the surface of the casing, etc. question

Inactive Publication Date: 2013-01-09
GUANGDONG JANUS SMART GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, various vehicle or mechanical coatings are often subjected to vibration or mechanical impact, and coatings with poor impact strength will cause peeling and chipping of the paint film and other premature damage.
[0008] At present, for consumer electronic products, due to repeated taking in and out, bumping and falling, etc. during use, the paint film coating on the surface of the case will be worn and torn to varying degrees. Phenomenon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Prototyping:

[0029] (1) Take an appropriate amount of paint, add diluent and curing agent in a certain proportion, and use it after filtering;

[0030] (2) Before painting, the plastic parts should be cleaned, dried, and static electricity removed. If necessary, the plastic materials should be heated and annealed to eliminate the stress of the plastic parts and eliminate the factors that affect the leveling and adhesion of the paint;

[0031] (3) After the pretreatment, spray paint on the surface of the plastic part and cure it.

[0032] Impact resistance test:

[0033] (1) Take the prepared sample with the paint film facing up, and place it flat on the center of the base.

[0034] (2) Place a 500g steel ball in the center hole of the drop frame, and the distance between the ball and the surface of the model is 50cm.

[0035] (3) Press the drop button, the suction cup releases the steel ball instantly, the steel ball falls freely from a height of 50cm, and hits the...

Embodiment 2

[0038] Prototyping:

[0039] (1) Take an appropriate amount of paint, add diluent and curing agent in a certain proportion, and use it after filtering;

[0040] (2) Before painting, the plastic parts should be cleaned, dried, and static electricity removed. If necessary, the plastic materials should be heated and annealed to eliminate the stress of the plastic parts and eliminate the factors that affect the leveling and adhesion of the paint;

[0041] (3) After the pretreatment, spray paint on the surface of the plastic part and cure it.

[0042] Impact resistance test:

[0043] (1) Take the prepared sample with the paint film facing up, and place it flat on the center of the base.

[0044] (2) Place a 300g steel ball in the center hole of the drop frame, and the distance between the ball and the surface of the model is 30cm.

[0045] (3) Press the drop button, the suction cup releases the steel ball instantly, the steel ball falls freely from a height of 30cm, and hits the...

Embodiment 3

[0048] Prototyping:

[0049] (1) Take an appropriate amount of paint, add diluent and curing agent in a certain proportion, and use it after filtering;

[0050] (2) Before painting, the plastic parts should be cleaned, dried, and static electricity removed. If necessary, the plastic materials should be heated and annealed to eliminate the stress of the plastic parts and eliminate the factors that affect the leveling and adhesion of the paint;

[0051] (3) After the pretreatment, spray paint on the surface of the plastic part and cure it.

[0052] Impact resistance test:

[0053] (1) Take the prepared sample with the paint film facing up, and place it flat on the center of the base.

[0054] (2) Place a 200g steel ball in the center hole of the drop frame, and the distance between the ball and the surface of the model is 100cm.

[0055] (3) Press the drop button, the suction cup releases the steel ball instantly, the steel ball falls freely from a height of 100cm, and hits t...

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PUM

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Abstract

The invention relates to the surface coating detection technical field, and especially relates to a method for testing ball falling impact resistant performance of a coating. The method comprises the following steps: manufacturing a templet; horizontally placing a test device on a testboard, ensuring no violent vibration at circumference and the humidity greater than 75% RH in a laboratory; taking the prepared templet which is characterized in that a paint film points towards, horizontally placing the templet at the center position of a pedestal; placing a steel ball with a certain mass in a center hole of a falling frame, keeping a certain distance from a ball body to the surface of the templet; pressing a falling bottom, instantly releasing the steel ball by a sucker so that the steel ball falls from a certain height in a free mode, impacting the templet surface; and determining the result; wherein the coating can not be broken and can not have the shedding in sheet shapes, and the cracking and tearing of the coating are allowed. According to the invention, after spraying a paint on the products, by performing the ball falling impact resistant performance test on the coating before usage, the toughness, hardness and deformation resistance capability of the paint coating can be fully understood, so that whether the paint satisfies the product usage requirement or not can be timely grasped, the paint performance is timely adjusted, and the product requirement can be satisfied.

Description

Technical field: [0001] The invention relates to the technical field of surface coating detection, in particular to a method for testing the impact resistance of a coating against falling balls. Background technique: [0002] The impact performance test is to measure the impact strength of the material under the action of impact load. The impact strength is used to evaluate the ability of the material to resist impact or to judge the degree of brittleness or toughness of the material. Therefore, the impact strength is also called impact toughness. The impact toughness of materials is an important performance index in engineering applications, which reflects the ability of different materials to resist damage caused by high-speed impact. Impact resistance is often affected by temperature, humidity, impact velocity, sample geometry and stress mode, so impact performance can only be used as a reference index for engineering design, because the impact performance test is only th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/303
Inventor 谢守德陈盛洪毕英慧肖体乐
Owner GUANGDONG JANUS SMART GRP CO LTD