1、 Preparation before operation

1. Equipment inspection
   • hydraulic systemCheck the oil level, oil temperature (usually maintained at 40-60 ℃), and whether the oil pipe connections are loose or leaking to ensure that the hydraulic oil is clean and free of impurities.
   • Electrical systemConfirm that the power supply voltage is stable, check that there is no aging or short circuit risk in the control cabinet wiring, and that the emergency stop button is functioning properly.
   • mechanical partsCheck whether the mold installation is firm, whether the guide column and guide sleeve are lubricated sufficiently, and whether the injection rod and punch are worn or cracked.
   • safety deviceVerify the sensitivity and reliability of protective devices such as safety doors, light barriers, and dual hand operation buttons to avoid personal injury caused by misoperation.
2. mold preheating
   • Set the preheating temperature of the mold (usually 150-300 ℃) according to the alloy type (such as aluminum alloy, zinc alloy), use a heating rod or mold temperature machine to evenly heat, and prevent local overheating from causing mold cracking.
   • After preheating, check that there are no residual water or oil stains on the surface of the mold cavity to avoid air holes or cold shuts during die-casting.
3. Material Preparation
   • Confirm that the composition of the alloy ingot meets the process requirements, and control the melting furnace temperature at 50-100 ℃ above the alloy liquidus line (such as 680-720 ℃ for aluminum alloy).
   • Check the release agent spraying system to ensure that the nozzle is unobstructed and that the concentration and spraying amount of the release agent meet the process standards.

2、 Monitoring during operation

1. Process parameter control
   • Injection velocityAdjust the injection speed according to the product wall thickness (usually 0.5-10m/s), and fill thin-walled parts at high speed to reduce cold insulation.
   • Injection pressureMonitor whether the pressure of the monitoring system is stable to avoid pressure fluctuations that may cause the product to shrink or flash.
   • holding timeSet the holding time (usually 2-10 seconds) according to the product structure to ensure sufficient solidification of the alloy.
   • mold temperatureControl the mold temperature through a mold temperature machine or cooling water channel to avoid excessive temperature differences that may cause product deformation or mold thermal fatigue.
2. quality control
   • Regularly inspect process samples to confirm the absence of defects such as pores, shrinkage, cracks, etc., and adjust process parameters in a timely manner.
   • Monitor the die-casting cycle time to ensure production efficiency and equipment load balance.
3. Hydraulic system maintenance
   • Avoid long-term overload operation of the hydraulic system and prevent seal aging caused by high oil temperature.
   • Regularly clean the hydraulic oil filter element to prevent impurities from entering the system and damaging the pump valve.

3、 Maintenance and upkeep

1. routine maintenance
   • Clean the surface oil stains of the equipment and keep the work area clean.
   • Check that the lubrication points (such as guide posts and sliders) have sufficient oil and regularly replenish lubricating grease.
   • Clean the residual alloy in the mold cavity to prevent mold jamming during the next production.
2. regular maintenance
   • hydraulic systemReplace hydraulic oil every quarter, check the wear of oil pump and valve block, and replace seals if necessary.
   • Electrical systemCheck the tightness of the wiring terminals every six months, clean the dust in the control cabinet, and prevent short circuits.
   • mold maintenanceRegularly repair and grind the mold cavity according to production frequency, and replace vulnerable parts such as sliders and diagonal pins.
3. Spare Parts Management
   • Reserve commonly used vulnerable parts (such as sealing rings, punches, nozzles) to shorten downtime due to malfunctions.

4、 Security protection

1. personal protection
   • Operators need to wear protective goggles, heat-resistant gloves, and anti smashing shoes to avoid splashing alloy or high-temperature mold burns.
   • Long hair needs to be curled up to prevent it from getting caught up in mechanical parts.
2. Equipment safety
   • Do not open the safety door or touch moving parts while the device is running.
   • When replacing or repairing molds, the power must be cut off and a "Do not close" warning sign must be hung.
3. environmental safety
   • Maintain good ventilation in the die-casting workshop and promptly discharge the smoke and dust generated by the melting furnace.
   • The oil stains on the ground need to be cleaned up in a timely manner to prevent slipping accidents.