🪢 Sheet Sticking to Mold
Causes, Solutions & Prevention in Thermoforming
Part sticks to mold, hard to remove. Causes delays and damage.
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⚠️Root Causes by Category
⚙️ Process
- Mold temperature too high
- Cooling time insufficient
🔲 Mold / Tooling
- Mold surface too smooth
- Insufficient draft angle
- No release agent or worn coating
🧪 Sheet / Material
- Shrinkage grips mold during cooling
✅Solutions & Corrective Actions
Step 1
- Apply release agent; consider PTFE coating
Step 2
- Increase cooling time before demolding
Step 3
- Draft angles min 3° (5°+ preferred)
Step 4
- Add air-eject for positive release
🛠️Step-by-Step Troubleshooting
1
Step 1
Apply release agent; consider PTFE coating
2
Step 2
Increase cooling time before demolding
3
Step 3
Draft angles min 3° (5°+ preferred)
4
Step 4
Add air-eject for positive release
❓Frequently Asked Questions
What causes sheet sticking to mold?
Mold temperature too high; Cooling time insufficient; Mold surface too smooth
How to fix sheet sticking to mold?
Apply release agent; consider PTFE coating
How to prevent sheet sticking to mold?
Prevention requires systematic process control: verify sheet temperature, maintain mold vents, ensure proper material drying, and document optimal parameters.
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