Start-up Precautions
1. Check the hydraulic oil level gauges of the extrusion blow molding machine and all hydraulic devices to ensure that the oil level in each tank is above the reference level.
2. The material used for extrusion blow molding should meet the required dryness requirements; further drying may be necessary.
3. Select the appropriate die head specifications according to the product type and size, and install the die head in the following order: Die head flange, die body, die nozzle, perforated plate, and filter screen.
4. Check and securely install the compressed air pipes. Install the mandrel heating rod and die head heating coil. Check and turn on the water supply valve to activate the cooling system. Adjust the die nozzle clearance to be uniform, and check the alignment of the main and auxiliary machine centerlines.
5. Start the extruder, die locking device, robotic arm, and other operating equipment. Perform no-load operation to check the normal operation of all safety and emergency devices. Address any faults promptly. 6. According to the process specifications, set the temperature of the extrusion blow molding machine head and each heating section, and heat each section sequentially. Test the integrity of each heating section using scrap material, and check for any instances of non-heating. After each part reaches the set temperature, maintain the temperature for 0.5–1 hour.
Shutdown Precautions
1. When shutting down, reset all speeds to zero, and shut down each heating section sequentially. Close the mold, ensuring it is in a closed state, with the blow needle half a centimeter away from the mold to prevent debris from falling into and damaging it. Apply rust inhibitor to the mold.
2. Turn off the main power supply, lubricate and maintain the automatic blow molding machine, add lubricating oil, clean the entire machine, and shut off all water supply lines. If the shutdown time is long, drain all water from the mold to prevent rust and blockage.
