Don't slack off during pre holiday shutdown | Injection molding machine shutdown inspection and maintenance guide

The holiday is approaching, and the equipment should also take a "safe vacation".

The shutdown of injection molding machines is not simply about cutting off power,

Scientific maintenance can effectively reduce post holiday startup failures

Extend the lifespan of the equipment.

　　Security prerequisite (mandatory)

Switch to manual mode, release hydraulic system pressure, and turn off the oil pump motor.

Lower the temperature of the material cylinder, wear insulated gloves to prevent burns from high temperatures.

During comprehensive maintenance, disconnect the main power and gas sources, and hang a warning sign that reads' During maintenance, do not close '.

The operation inside the electrical box must be powered off, and it is forbidden to blow electrical components with an air gun when they are live.

It is prohibited to cross the safety gate or remove the safety interlock device.

　　Barrel (Cannon Barrel)&Screw Maintenance (Key)

Before stopping the machine, remove the hopperraw materialEmptying;POMThePVCThermal/corrosive materials must be thoroughly cleaned and replaced with PP/PE washing materials to prevent residual materials from decomposing at high temperatures, corroding the screw barrel, and carbonizing carbon deposits.

After the cleaning is completed, the shooting platform retreats and the screw retracts to its maximum stroke; Cooling of the material cylinder, do not directly cut off the power.

Short term shutdown: When the insulation of the material barrel drops below 100 ℃, turn off the heating.

Long term shutdown: The interior of the barrel is sealed with PP material to protect the surface of the screw and prevent oxidation and corrosion.

　　Locking mechanism and mold maintenance

Do not completely lock or straighten the hinge (elbow) of the locking machine, maintain a mold clearance of 5-10mm, and keep the hinge in a stress free state to eliminate continuous stress.

Clean the residual adhesive chips on the parting surface, guide post, and top pin; Spray anti rust agent on the mold cavity; After cleaning the guide column, machine hinge, and Green column (pull rod), add lubricating grease.

It is recommended to remove the mold after a shutdown of more than 7 days and store it separately for rust prevention to reduce the load on the locking mechanism.

Check the safety door, travel switch, and mechanical safety lock to ensure they are sensitive and reliable.

　　Maintenance of cooling water circuit (anti freezing and anti rust)

Close the cooling water inlet valve, disassemble the mold, barrel cooling water ring, and cooler water pipe.

Use compressed air to blow out all accumulated water in the pipeline and cooler to prevent rusting; Prevent freezing and cracking of water circuits and coolers in low-temperature environments.

Clean the scale on the cooler and check for aging and leakage in the water pipes.

　　Hydraulic and lubrication system

Check the hydraulic oil level and quality for emulsification and impurities; The fuel tank cap is sealed.

Perform automatic lubrication of the entire machine once, manually lubricate the pull rod, guide rail, mold adjustment gear, and piston rod with grease; Wipe off excess oil stains.

Check for oil leakage in hydraulic pipelines and joints; Reset the pressure gauge to zero.

　　Electrical system

Clean the filter screen and internal dust of the electrical box after power outage, and use a vacuum cleaner; It is strictly prohibited to blow high-pressure gas directly onto the circuit board.

Check whether the wiring terminals are loose or overheating; Take measures to prevent moisture and rodents.

Long term shutdown: backup machine parameters and mold parameters; Check the PLC battery, replace it promptly if the power is low, and prevent parameter loss.

Turn off the power supply of auxiliary machines (dryer, chiller, feeder).

　　Whole machine cleaning and finishing

Clean up the rubber debris and oil stains around the machine, frame, and hopper; Do not spray highly corrosive cleaning agents on paint surfaces.

Short term shutdown: Cover with dust-proof cover; Long term shutdown: Cover the entire machine with a dust cover.

Make a good shutdown record: machine number, shutdown time, any abnormal points found during inspection, and handover.