A worn check ring stops sealing on injection, so material back-flows past it during pack. The visible symptom is shot-to-shot weight variation and inconsistent cushion — usually blamed on the process long before anyone suspects the ring.
The steps ChatterFix schedules for this PM. Every step is a checkable item on the work order — a technician can speak their way through it without touching a keyboard.
A worn check ring stops sealing on injection, so material back-flows past it during pack. The visible symptom is shot-to-shot weight variation and inconsistent cushion — usually blamed on the process long before anyone suspects the ring.
Dimensional variation that no amount of process tuning stabilises, rejected parts, and eventually screw and barrel wear that turns a cheap ring replacement into a barrel job.
Semi-annually for most tools; sooner with glass-filled or flame-retardant compounds, which are genuinely abrasive. Cushion variation trending upward is the signal to pull it early.
This procedure — and every other PM for your industry — is already built into ChatterFix. Pick your industry and it lands on the right equipment, on the right interval, in about three minutes.