Air eject introduces positive pressure through the mold to break the seal and assist part release. If the flow is too weak or late, the part may stick, scuff, or deform as the tool opens.
Low supply pressure is only one cause. Restricted ports, clogged passages, slow valves, leaks, incorrect sequencing, and an unstable air header can reduce the pressure that actually reaches the part. A part that is still too soft may absorb the air locally instead of releasing cleanly.
Correction
Pressure should be measured close to the mold during the release event. The valve command and actual pressure rise should be compared. Passages must be clean and connected to the locked regions.
Air eject should be increased gradually and coordinated with tool opening. Excessive pressure can fracture, balloon, or eject the part unpredictably. The mold and baseboard must remain securely fixed to the machine throughout the event.