Two-Platen Machine Debugging Guide
Two-platen injection molding machines are suitable for large molds and long opening strokes. Their debugging focus is different from toggle machines because clamping force is usually built by tie-bar locking and high-pressure clamping cylinders.
1. Mold Installation Check
Confirm that the mold size, locating ring, mounting bolts, ejector connection, cooling-water connection, and moving clearance meet the machine requirements.
2. Platen Movement
Run mold opening and closing at low speed first. Check whether the moving platen travels smoothly and whether position feedback is stable.
3. Tie-Bar Locking and Clamping Force
Before applying high pressure, confirm that the tie-bar locking mechanism is fully engaged. Increase clamping force gradually and observe whether pressure builds evenly.
4. Mold Protection
Set low-pressure mold protection carefully. Large molds have higher inertia, so mold-closing speed should be reduced before the mold-protection area.
5. Common Issues
| Symptom | Possible Cause | Suggestion |
|---|---|---|
| Clamping force cannot build | Tie-bar locking incomplete or pressure leak | Check locking position and hydraulic sealing |
| Platen movement not smooth | Guide rail friction or unbalanced mold load | Check lubrication and mold installation |
| Mold protection false alarm | Protection force too low or mold movement resistance high | Recheck mold alignment and tune protection settings |
| Uneven part flash | Clamping force distribution or mold parallelism issue | Check mold surface and platen parallelism |