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Operation process and heating capacity of natural gas mold temperature controller
announcer：admin
The stronger the heating capacity of the natural gas mold temperature machine, the required heating time will be reduced accordingly, the heating capacity is doubled, and the heating time is reduced. It is often because the ability of the mold temperature controller is too low, which causes the mold to not reach a good temperature state. To know the actual performance of the mold temperature controller, we can compare its actual and calculated mold heating time.
The design and components of the refrigeration circuit of the natural gas mold temperature machine are important for the control of the mold temperature. When the temperature of the mold or heating liquid rises to the set value, the mold temperature controller must be able to quickly and effectively prevent the temperature from continuing to rise. The method is to introduce another lower temperature liquid, and the control of the introduction is the solenoid valve. . Therefore, the elimination and stability of temperature override depends on the size of the solenoid valve.
The main purpose of the natural gas mold temperature controller is to control the mold temperature within the range of (±2°F). Therefore, the temperature control of the liquid running between the mold pipes must be accurate, otherwise the purpose of mold temperature control cannot be achieved. The control method of some mold temperature controllers only belongs to the on/off form, and its working principle is to compare the actual and set temperatures. If the actual temperature is much lower than the set temperature, the electric heating will be fully turned on. When the actual temperature reaches the set value, the electric heating will be turned off. Due to the on/off control, a large actual positive and negative temperature deviation occurs. This temperature change not only directly affects the temperature of the liquid, but also indirectly gives the mold a large excessive rise and fall, needless to say, it must be reflected in the quality of the finished product.
Operation process of natural gas mold temperature machine
1. Check before starting
1. Whether the surrounding area is clean and free of debris, check whether the power supply, heater, controller, pressure gauge, pump, etc. are normal.
2. Check whether the oil level of the expansion tank is above 1/2-3/5 liquid level, and whether the liquid level sensor is normal.
3. Turn on the power of the control cabinet, check whether the voltage is normal, and check whether the indicator lights and all display instruments are normal.
Second, start
1. Start the heat conduction oil circulation pump, and start the normal circulation for about 0.5 hours after the pump is turned on to make the pressure stable;
2. Press the heating start button and observe whether the heating is normal;
3. Shutdown operation
1. Normal shutdown ① Gradually lower the temperature and stop heating; ② Stop the operation of the thermal oil circulation pump when the temperature of the thermal oil drops below 70°C; ③ Turn off the main power supply and make a record of handover.
2. Emergency shutdown If the emergency shutdown occurs due to an emergency, the heating tube should be quickly turned off to allow the thermal oil to cool naturally and prevent overheating.