Oct 6, 2026Mold Monitor System
32-Cavity Mold Monitoring: Detecting Stuck Parts Before Mold Closing
See how a mold monitoring system detects parts remaining in a 32-cavity injection mold and stops mold closing before potential mold damage.
The Application
A customer recently asked us to evaluate mold protection for a 32-cavity injection mold, approximately 488 × 466 × 646 mm.
The requirement was simple:
If even one product remains in the mold after ejection, detect it and stop the machine before the next mold-closing cycle.
This is especially important in multi-cavity precision molding. Even when 31 parts eject correctly, one remaining part can create a risk of mold damage.
How the Mold Monitoring System Works
The inspection takes place after ejection:
Mold opens → Parts eject → Camera checks the mold → OK: continue / NG: stop mold closing
Individual inspection areas can be assigned to the critical cavity positions. If a part remains in any monitored area, the system outputs an NG signal to the injection molding machine.
One Camera or Two?
For this application, one camera may be sufficient if its mounting position provides a clear view of all 32 cavities.
However, if the customer also wants to verify that ejectors have returned to the correct position, a dual-camera system is more suitable because the second camera can monitor areas that are difficult to see from the main viewing angle.
The number of cameras should therefore be determined by field of view and inspection requirements—not simply by cavity count.
Need to Monitor a Multi-Cavity Mold?
Send us your mold dimensions, open-mold photos and a short production video. We can evaluate the field of view and recommend a suitable mold monitoring configuration.
