Meaning
Scheduled maintenance regimen detailing required inspection, cleaning, lubrication, and component replacement tasks executed at fixed shot intervals or operating hours to prevent equipment failure. Systematic maintenance routines for injection moulds and moulding presses cover ejector pin greasing, parting line residue cleaning, seal replacement, and hydraulic oil filtration. Implementing a preventative maintenance schedule extends tooling operational life, minimizes unscheduled machine downtime, and maintains dimensional accuracy of moulded parts.
The schedule stops applying when equipment is decommissioned or removed from active service.
Tool Inspection
Tooling maintenance protocols schedule teardown inspections every fifty thousand or one hundred thousand cycles based on resin abrasiveness. Technicians disassemble core and cavity plates to clean vent paths, inspect guide pins for wear, and replace worn O-rings. Glass-filled resins cause rapid gate erosion, requiring frequent maintenance to prevent parting line flash.
Machine Maintenance
Injection moulding machines undergo daily, monthly, and annual maintenance checks to maintain mechanical precision and clamp force calibration. Hydraulic oil filtration prevents valve sticking and oil temperature spikes, while screw tip assembly inspections verify non-return valve shutoff performance. Scheduled machine servicing prevents costly hydraulic pump failures and barrel wear.
Production Impact
Planned downtime scheduled between production runs costs significantly less than emergency tool repairs during active production orders. Clean tool vents prevent gas burning defects, reducing part scrap rates. Documenting maintenance histories protects warranty coverage and satisfies quality system audit requirements.