An injection moulding machine preventive maintenance schedule lists the checks and jobs done on the equipment at fixed intervals, how long each takes, and in what order of frequency, so problems are found before the injection moulding machine fails. This page gives the schedule used in the PlantOps360 task library for injection moulding machine, which follows common industry practice for general-purpose equipment. It is also searched for as injection moulding, IMM, plastic injection machine, moulding machine.
The maker’s manual and your site safety procedures always come first where they differ. Intervals set by law differ by state.
Injection moulding machine preventive maintenance schedule and checklist
| How often | Task | Estimated time |
|---|---|---|
| Daily | Check hydraulic oil level and temperature, cooling water, platen and tie bar lubrication and safety gate | 10 min |
| Daily | Check barrel heater bands, hopper magnet and nozzle for leaks or drooling | 5 min |
| Weekly | Check the safety gate and emergency stop functions; clean the hopper and feed throat | 20 min |
| Monthly | Check the oil filters and breather; check the toggle lubrication and clamp tonnage | 45 min |
| Quarterly | Check the screw and barrel wear, non-return valve and screw drive; check the oil sample | 90 min |
| Half-yearly | Replace the hydraulic filters and check hoses; check the accumulator pre-charge | 180 min |
| Annual | Annual overhaul: oil change as per condition, platen parallelism, tie-bar wear and calibration of pressure and position sensors | 480 min |
Injection moulding machine maintenance frequency and yearly workload
At the estimated times, one injection moulding machine needs about 138 hours of preventive maintenance a year. The biggest single job is “Annual overhaul: oil change as per condition, platen parallelism, tie-bar wear and calibration of pressure and position sensors” at 480 minutes, done annual. Multiply by the number of units you have to see the workload for your plant.
| Frequency | Tasks | Time per round | Hours per year |
|---|---|---|---|
| Daily | 2 | 15 min | 91.3 h |
| Weekly | 1 | 20 min | 17.3 h |
| Monthly | 1 | 45 min | 9.0 h |
| Quarterly | 1 | 90 min | 6.0 h |
| Half-yearly | 1 | 180 min | 6.0 h |
| Annual | 1 | 480 min | 8.0 h |
What goes wrong on an injection moulding machine without preventive maintenance
- Hydraulic leaks and oil contamination
- Screw and barrel wear
- Heater band failure
- Platen and tie-bar wear
What to watch between services
- Barrel temperatures
- Hydraulic oil temperature
- Cycle time drift
Safety and statutory notes for injection moulding machine maintenance
Keep the safety gate interlocks tested and never bypass them. Moulds and hot runners are tracked as assets of their own.
Where an injection moulding machine preventive maintenance schedule is used
This equipment is used in the industries below. Each link opens the preventive maintenance schedule guide for that industry, and the maintenance software page where we have one.
- Preventive maintenance schedule for automotive plants · maintenance software for automotive
- Preventive maintenance schedule for electronics manufacturing plants · maintenance software for electronics
- Preventive maintenance schedule for fmcg and consumer goods plants · maintenance software for fmcg
- Preventive maintenance schedule for packaging, paper and printing plants · maintenance software for packaging · maintenance software for paper and pulp
- Preventive maintenance schedule for plastics, rubber and polymer plants · maintenance software for plastics · maintenance software for tyre and rubber
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Browse the full list of equipment preventive maintenance schedules (317 types).
Run this injection moulding machine schedule in maintenance software
In preventive maintenance software, each row above becomes a recurring task on the asset with its checklist, time estimate and parts. Tasks can be triggered by calendar date, running hours, meter readings or production cycles, each completed task is recorded with the person and date, and a failed check can open a work order. For the method behind it, read the guide to the preventive maintenance schedule, or use the free generator to get a 12-month plan for your whole equipment list.
Build my preventive maintenance schedule (free Excel)
Frequently asked questions
How often should an injection moulding machine be serviced?
In our schedule an injection moulding machine has 7 tasks: 2 daily, 1 weekly, 1 monthly, 1 quarterly, 1 half-yearly, 1 annual. The biggest job is “Annual overhaul: oil change as per condition, platen parallelism, tie-bar wear and calibration of pressure and position sensors”, which is done annual. Always follow the maker’s manual where it gives a different interval.
What is included in injection moulding machine preventive maintenance?
It covers routine checks and jobs such as “Check hydraulic oil level and temperature, cooling water, platen and tie bar lubrication…”, “Check barrel heater bands, hopper magnet and nozzle for leaks or drooling”, “Check the safety gate and emergency stop functions; clean the hopper and feed throat”, up to the annual overhaul or inspection. The full list with times is in the table above.
How many hours of maintenance does an injection moulding machine need per year?
About 138 hours per unit per year at the estimated times in our library, including the daily checks done every day. Use it to plan workload, not as a benchmark.
Is there a free injection moulding machine maintenance checklist?
Yes. The table on this page is a ready checklist. The free preventive maintenance schedule generator turns it into a 12-month Excel schedule for your list of equipment, with monthly workload hours.