Technical Resource

Mold Maintenance Guide

Proper maintenance extends mold life, improves part quality, and reduces unexpected downtime. Follow this guide to maximize your investment.

Why Maintenance Matters

The impact of proper mold care

2-3x

Longer mold life

15%

Fewer defects

20%

Less downtime

30%

Lower repair costs

Daily Maintenance Checklist

Tasks to perform every production day

Daily Tasks

Visual inspection of parting surfaces

Detect damage early

Check ejector pin operation

Prevent pin breakage

Verify cooling water flow

Maintain cycle time

Clean mold surfaces of residue

Prevent buildup

Lubricate guide pins and bushings

Smooth operation

Weekly Maintenance Checklist

Tasks to perform once per week

Weekly Tasks

Deep clean venting channels

Prevent burn marks

Inspect and clean cooling channels

Efficient cooling

Check hot runner system (if equipped)

Prevent degradation

Verify all mechanical movements

Catch wear early

Document shot count

Track mold life

Scheduled Maintenance

Based on shot count milestones

Every 50,000 shots

Complete disassembly and cleaning
Replace worn ejector pins
Polish cavity surfaces if needed
Check all O-rings and seals

Every 100,000 shots

Full dimensional inspection
Replace springs and wear components
Re-texture if needed
Hot runner nozzle inspection

Every 250,000 shots

Major overhaul assessment
Core and cavity measurement
Consider re-plating or coating
Update maintenance records

Troubleshooting Common Issues

Problems and solutions

Flash on parts

Possible Causes

Worn parting surfaces
Debris on mold
Excessive pressure

Solutions

Clean parting line
Polish if worn
Adjust process

Sticking in cavity

Possible Causes

Insufficient draft
Surface damage
Undercuts

Solutions

Apply mold release
Polish cavity
Check ejection

Cooling inefficiency

Possible Causes

Scale buildup
Blocked channels
Air pockets

Solutions

Descale channels
Flush system
Check flow rate

Ejector pin marks

Possible Causes

Worn pins
Misalignment
Excessive force

Solutions

Replace pins
Realign system
Adjust timing

Long-Term Storage Guidelines

Protecting molds during extended downtime

Before Storage

Complete thorough cleaning
Apply rust preventive coating
Drain all cooling channels
Spray cavities with protection oil
Document current condition

Storage Environment

Climate-controlled area preferred
Keep humidity below 50%
Store on wooden pallets
Cover with protective wrapping
Check periodically (monthly)

Need Maintenance Support?

We provide spare parts, technical guidance, and mold repair services for all molds we manufacture.

Contact Support After-Sales Services