Daily Inspection Checklist
Electrical System
Do not power on unnecessarily when checking high-voltage parts. Prevent water ingress into the control cabinet during mold changes. Monitor control cabinet temperature to prevent electronic component damage. Replace old relays only with manufacturer-specified replacements.
Hydraulic System
Maintain pressure oil temperature between 30 and 50 degrees Celsius to prevent oil oxidation. Monitor oil viscosity to prevent pump damage and internal leakage. Inspect the oil cooler regularly for any water leakage into the oil system. Replace pressure oil and clean the oil screen every 3,000 to 4,000 operating hours. Clean oil valve cores with diesel oil or kerosene to remove foreign bodies.
Clamping Unit
Properly lubricate all hinge parts and pivot points for long service life. Keep tie bars clean and free of debris. Lubricate sliding feet and guide rails. Never clamp molds under insufficient or excessive pressure as this damages both the mold and the machine.
Injection Unit
Keep the guide bar lubricated and the injection platform surface clean and dry. Only introduce approved plastics, pigments, and additives into the hopper. Never power on the melting motor until the melting pot reaches its preset operating temperature. Regularly inspect all injection unit parts and tighten any loose components.
Weekly Inspection Checklist
Check all heaters for disconnection or poor connection using the perimeter indicator. Inspect for any oil leakage anywhere on the machine, even minor leaks must be resolved. Verify the automatic lubricator operates correctly every 30 minutes, serving all toggle moving parts, the moving platen, and cross platen. Check all screws and nuts for loosening. Inspect nozzle heater bands for resin attachment on wiring ends and heater band surfaces. Clean remaining waste hydraulic oil from inside the machine. Thoroughly clean the entire machine body, removing greasy dirt, dust, and unnecessary attachments. Apply anti-rust paint after cleaning where needed.
Monthly Inspection Checklist
Double-check all weekly inspections with stricter standards. Verify ground wiring connections are tight and have good continuity, as poor grounding creates electric shock risk. Check all electrical wiring, ensuring all relays are properly seated, contact surfaces are free of dust, water, and oil, and terminal screws are not loosened. Inspect the moving platen and hydraulic motor slide stand for wear or loose mounting screws. Clean or replace the hydraulic oil filter monthly.
Quarterly Inspection Checklist
Double-check all monthly inspections more thoroughly. Send a hydraulic oil sample to a qualified oil analysis laboratory for testing. Check each machine movement axis for abnormal wear patterns or worn components. Clean or replace the filter core quarterly. Clean the heat exchanger and cooler every six months.
Annual Inspection Checklist
Clean the electrical motor inlet gap and cooling passages using a steel brush or compressed air blower, as accumulated dirt and dust can damage the motor heating system. Install ventilating windows where needed and check all ventilation systems to prevent dirt from causing motor overheating that raises hydraulic oil temperature. Measure electrical insulation resistance to prevent leakage, as electrical wrapping and insulation degrade year by year. Conduct a comprehensive alignment check of all axes and verify all safety interlocks and emergency stops function correctly.
