Hang-Paint Hook Care: Build-Up Removal and Contact Point Standards — 挂漆钩具保养：积漆清除与接触点标准.
A working reference designed to be printed and used at the line. It complements the failure case studies in the Technician Hub with the standard documents those cases eventually produced.
Common Mistakes and How to Avoid Them
| Mistake | Why It Happens | Practical Fix |
|---|---|---|
| 1. Spraying on built-up hooks | Paint flakes contaminate fresh work | Strip hooks on schedule |
| 2. Judging bake by look | Under-bake passes visual, fails adhesion | Record strips; keep archive |
Best Practices
- Hook strip schedule by cycle count
- Wet film gauge at the booth
- Bake strip archive per week
Hook and Bake Discipline
- Check hook build-up - Strip per schedule (Flakes ruin fresh paint)
- Wet film first part - Adjust before continuing (Never skip first-part check)
- Bake strip in oven - File the record (Look is not cure)
Strip schedule by cycles | Archive reviewed weekly
Hanging Line Reference
Application and bake windows for hanging paint lines.
| Parameter | Reference | Why It Matters |
|---|---|---|
| Hook build-up strip | Per cycle count | Flakes contaminate fresh work |
| Wet film thickness | Per spec ±10% | Adjust at first part, not after |
| Flash-off | Per data sheet | Balances flow and dust |
| Bake curve | Recorder verified | Under-bake fails adhesion |
First-part wet film checks
Scenario. Film build drifted after color changes and passed visual checks.
Action. Wet film gauge check on the first part of every color.
Result. Adhesion complaints from plating-side customers dropped to zero.
Frequently Asked Questions
How often should hooks be stripped?
On a cycle count, before build-up flakes. Flakes land on fresh paint.
Why check wet film on the first part?
Every color change shifts the setup. One reading per change prevents a whole run at the wrong film.
Is a visual bake check enough?
No. Under-bake passes visually and fails adhesion testing. Recorder strips are the evidence.
Implementation Roadmap
| Step | Frequency |
|---|---|
| Hook care live | Every cycle |
| Wet film checks live | Week 1 |
| Changeover sequencing plan | Month 1 |
What Would You Like to Solve?
If you would like this checklist or template adapted to your own line and part mix, contact QLQ — we supply the full equipment and chemistry package along with the working documents that make it run.