From Reactive to Scheduled: A Mold PM Framework
Three tiers of tasks
Tier 1 (per shift/per run): visual checks, vent cleaning, water-line leaks, ejector function. Tier 2 (interval-based): guide element inspection and lubrication, seal replacement, plate flatness checks. Tier 3 (overhaul): full teardown, wear measurement, rework of moving fits.
The tier structure keeps daily effort light while catching wear before it produces scrap.
Let the mold tell you the interval
Start with the mold maker's recommendations, then adjust by observed wear: molds running abrasive or corrosive resins need shorter intervals; stable, clean-running molds can stretch them. Track flashing, sticking and cycle drift as leading indicators.
A simple log per mold — date, task, finding, parts replaced — is more valuable than an elaborate plan nobody updates.
Base components deserve their own lines
Guide pillars and bushings, springs, seals and locating rings wear invisibly inside an assembled mold. List them explicitly in the schedule with inspection methods and replacement triggers, so the overhaul isn't guesswork.
FAQ
How often should a mold be overhauled?
Depends on resin, abrasiveness and cycle count; use the maker's baseline, then tune intervals by logged wear findings.
What are the first signs of guide wear?
Increasing flash, slight misalignment marks on parting surfaces, and growing setup fiddling to get good parts.
Which base parts are replaced most?
Springs, seals and O-rings lead; guide bushings follow on higher-cycle molds.
Is maintenance data worth tracking?
Yes — per-mold logs turn maintenance from guesswork into scheduling, and justify replacement or upgrades with data.
All figures above refer to standard product data sheets; final confirmation is subject to written quotation.