Product Info

Preventive Maintenance (PM) for injection moulds reduces downtime, extends mold lifespan, improves product quality, and lowers long-term repair costs. This structured approach ensures factories maintain consistent production efficiency and customer satisfaction.


■ Introduction: Molds Are the Heart of Injection Molding
In plastic injection moulding (Plastic Injection Moulding), the mould is the most critical asset. Even advanced injection machines cannot compensate for a mould that suffers from wear, contamination, or cracks.

Factories relying only on Corrective Maintenance (repair after failure) face:

- Higher unexpected downtime
- Delayed deliveries
- Higher repair expenses

By implementing Preventive Maintenance (PM), factories can extend mold service life, reduce scrap, and control costs effectively.


1. Problems from Inadequate Mould Maintenance

1.1 Defective Parts
Worn or dirty moulds cause:

- Flash (excess plastic)
- Short Shot (incomplete filling)
- Sink Marks (surface depressions)
- Dimensional errors

1.2 Unexpected Downtime

Cracks, broken ejectors, or stuck parts may force sudden production stops.

1.3 High Repair Costs

Unplanned emergency repairs are far more expensive than scheduled preventive checkups.


2. Preventive Maintenance Guidelines
A structured PM program should include daily, periodic, and overhaul-level inspections.

2.1 Daily Checks
- Clean mould surfaces before/after use
- Inspect for cracks and abnormal wear
- Check cooling channels and vents for blockages

2.2 Periodic Maintenance (Weekly/Monthly)
- Inspect moving parts (ejector pins, slides, lifters)
- Clean gates and runners from buildup
- Descale cooling channels to prevent flow restrictions

2.3 Full Overhaul (Planned Shutdowns)
- Disassemble the mould for deep inspection
- Replace worn-out parts
- Verify parting line alignment and clamp pressure balance

👉 Using maintenance logs, checklists, and history tracking ensures recurring issues are addressed systematically.


3. Key Benefits of Preventive Maintenance
- ✅ Extended mould lifespan – reduces replacement frequency
- ✅ Reduced downtime – ensures continuous production
- ✅ Improved part quality – lower scrap and reject rate
- ✅ Lower long-term maintenance costs – planned vs. emergency repairs
- ✅ Audit readiness & customer trust – supports ISO and quality audits


■ Why Choose Muto (Thailand) for Injection Moulding Services?
Muto (Thailand) is a one-stop plastic injection solution provider, covering:

- Mould design & fabrication
- Injection moulding
- Decoration & assembly
- Quality inspection

We implement Preventive Maintenance systems across all moulds, with:
- Skilled mould engineers and technicians per production line
- Maintenance records & performance tracking per mould
- Simulation and trend analysis to predict and prevent failures
- Quick support for troubleshooting and servicing

👉 Whether your goal is higher production efficiency, defect reduction, or cost optimisation, Muto (Thailand) delivers reliable mould management solutions.


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