Many people also know that the coating of the customized keyboard shell is bad, but how long it takes to solve the problem and how many bad phenomena appear are quite different. Some people spend two hours finding and solving problems, while others spend a whole day finding problems. Why? The root cause is that there is no systematic analysis of the phenomenon of poor fuel injection and no summary of the final cause. Therefore, it is very important to be familiar with the causes of poor system control. Below we list 9 common undesirable phenomena of customized keyboard case coating.

9 Common Bad Phenomena of Custom Keyboard Case Coating

1. Less Oil
Description of undesirable phenomenon: the paint film thickness cannot reach the specified thickness, showing the true color of aluminum shell.
(1) Spray imbalance caused by spray gun blockage, unstable air pressure, etc
(2) The spray gun spray position is inappropriate
(3) Improper arrangement of fixtures and equipment and products
(4) The fixture is not well made and the spray surface is blocked

2. Oil Accumulation
Description of undesirable phenomenon: excessive paint accumulated on some parts of the surface of the customized keyboard shell after spraying, resulting in uneven oil surface.
(1) It is not enough to enter the flat surface
(2) The fuel injection is too thick
(3) The fixture is not level enough
(4) The injection part of the oil gun is stable

3. Scraping
Description of undesirable phenomenon: scratch or grinding on the product surface.
(1) Scratched by equipment during production
(2) Manually scrape when removing the fixture
(3) Poor packaging, replaced with packaging materials

4. Highlights
Description of undesirable phenomena: the gloss and color of one part of the surface of the customized keyboard shell are different from other parts and are luminous.
(1) Poor atomization of spray gun
(2) The surface of aluminum shell is not clean and there are foreign matters
(3) Base oil flow is not completely dry

5. Black Printing
Description of undesirable phenomenon: there are dark shadows or dots on the surface of the aluminum shell with good oil spraying.
(1) Material is scratched
(2) Clamps are scraped surfaces
(3) Dirty objects entering the material surface
(4) The entering surface is abnormal

6. Color Difference
Description of undesirable phenomenon: the color of customized keyboard shell after spraying is different from that of the sample provided by the customer.
(1) The paint material is inconsistent with the sample paint
(2) The customer replaces the aluminum shell material
(3) Spray parameters are not properly adjusted
(4) The ambient humidity and drying temperature are not adjusted as required
(5) Unstable spray pressure
(6) Foreign matter in spray equipment
(7) The paint layout is inconsistent with the sample

7. Uneven Gloss
Description of undesirable phenomenon: the gloss of the surface of the customized keyboard shell after spraying is inconsistent, with a negative side.
(1) Uneven spray
(2) The spray gun is unstable
(3) The paint is not mixed evenly
(4) Insufficient baking ventilation
(5) Poor raw materials

8. Foam
Description of undesirable phenomenon: the surface of aluminum shell is protruding after spray drying, which looks like bubbles.
(1) When spraying surface oil, the surface oil is not dry
(2) The baking temperature is too high
(3) Temperature rises too fast during baking
(4) There are foreign matters on the surface of aluminum alloy shell.

9. Pinhole
Description of undesirable phenomena: pinholes appear on the surface of customized keyboard shell after spray drying.
(1) The baking temperature is too high
(2) The baking temperature rises too fast
(3) Paint solvent does not meet the requirements
(4) There are foreign matters on the surface of the product
(5) The base oil is not completely dry