The correct startup process of the conveyor belt vulcanizing machine is the key to ensuring the safe operation of the equipment and the quality of vulcanization. The following are the detailed startup steps and precautions:
First, check before starting up
Equipment integrity inspection
Confirm that all components of the vulcanizing machine (such as the heating plate, hydraulic system, and electrical control box) are undamaged or loose.
Check whether the conveyor belt joints have been correctly placed in the vulcanizing machine, and whether the joints are aligned and free of foreign objects.
Inspection of electrical and hydraulic systems
Ensure a stable power connection and that the voltage meets the equipment requirements (usually 380V three-phase electricity).
Check whether the hydraulic oil level is within the normal range and there is no leakage in the hydraulic system.
Safety protection inspection
Make sure there are no obstacles around the vulcanizing machine. The operators should wear protective gloves, goggles and other equipment.
Check whether the emergency stop button is sensitive and available.
Second, the startup process
Start the hydraulic system
Turn on the power of the hydraulic pump and slowly increase the pressure to the specified pressure (usually 1.0-2.0MPa) to ensure the pressure is stable.
Observe the reading of the hydraulic gauge to avoid either too high or too low pressure.
Starting heating system
Set the vulcanization temperature (usually 145-150℃) and start the heating plate.
During the heating process, check the temperature every 10 minutes to ensure uniform temperature rise.
Pre-pressing and mold closing
When the temperature reaches the set value, pre-pressurize (with a pressure of approximately 50% of the working pressure) for 5 minutes.
After confirming that there are no abnormalities, apply pressure to the working pressure, close the mold and lock it.
Vulcanization timing
Start the vulcanization timer. The vulcanization time should be set according to the material and thickness of the conveyor belt (usually 30 to 45 minutes).
During the vulcanization process, closely monitor the changes in temperature and pressure to ensure the stability of parameters.
Third, operations after vulcanization is completed
Pressure relief and cooling
After the vulcanization time is completed, slowly release the pressure to zero to avoid sudden pressure drops that may cause damage to the joint.
Keep the heating plate closed and let it cool naturally to below 60℃ (usually taking 1-2 hours) to prevent the joint from cracking due to excessive temperature difference.
Demolding and inspection
After the cooling is completed, turn on the vulcanizing machine and remove the conveyor belt joint.
Check whether the surface of the joint is flat, free of bubbles or cracks, and make adjustments if necessary.
Cleaning and maintenance
Clean the heating plates, molds and surrounding areas of the vulcanizing machine to remove residual rubber or impurities.
Turn off the power supply and record the vulcanization parameters (temperature, pressure, time) for subsequent reference.
Fourth, Precautions
Temperature and pressure control
It is strictly prohibited to operate beyond the temperature limit (exceeding 155℃) or pressure limit (exceeding 2.5MPa) to avoid damaging the equipment or joints.
If any abnormal temperature or pressure is found during the vulcanization process, the machine should be stopped immediately for inspection.
Safe operation
During operation, it is strictly forbidden to touch the heating plate or hydraulic components to prevent scalding or squeezing.
Flammable items are prohibited from being piled up around the vulcanizing machine to ensure good ventilation.
Regular maintenance
Check the hydraulic oil level and the insulation performance of the electrical control system every week.
Clean the residual glue on the heating plate and calibrate the temperature sensor every month.
Replace the hydraulic filter every quarter and check the aging condition of the seals.