[China Aluminum Industry Network] According to the principle of resolving defects, we must first clarify three issues:
1. What conditions have changed?
2. To what extent?
3. Why did such changes occur?
In order to clarify these issues, generally follow the following steps:
1. Check whether the paint number, batch number and thinner are correct, whether the coating viscosity is within the process range, and check and monitor one by one.
2. Check whether the raw material aluminum coil is polluted during the process.
3, check the coating roller grinding defects.
4. Check whether the coating roller, feed roller, paint roller, metering roller speed matching and production line speed are within the process range.
5, check the equipment, air pressure is normal.
6. Check if the operator is operating correctly.
7, check the environmental humidity, whether the temperature changes.
8. Check if the paint pump leaks or leaks oil.
9, check the filter is intact.
10. Check the degree of clamping of the feed roller $ coating roller.
11. Check if the paint tray partition plate is correct.
12, check whether the scraper scrapes clean.
13, check the tension is normal.
14, due to the coating production process is long, so the treatment method must start from the discovery of defects in the direction of a process one by one to check the above method, until found the cause of the defect, and then for the corresponding treatment.