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2. Structure Characteristics and Working Principle
2.1 Main Functions
STM - W/O series of dual - purpose heater are mainly used to heat up the
mould and maintain its temperature, although they can be also used in other
similar applications. High temperature water or oil return from the mould is
cooled by indirect cooling and then sent to the pipe heater via high - pressure
pump for heating to a constant temperature. This unique design allows user to
choose between water and oil as heat transfer medium. With our optimised
design, the OMRON temperature controller can maintain an accuracy of ±1℃.
2.1.1 Working Principle
Picture 2-1：Working Principle
High temperature water returns to the machine and then be pressured by pump
to the heater. After being heated, water will be forced to mould and continue the
circle. In the process, if the temperature is too high, the system will activate the
solenoid valve to let cooling water cool down the temp. directly till the water
temp. is down to the system requirement. If the temp. keep rising and reach to
the set point of EGO, the system will alarm and stop operation. The system will
have low pressure alarm and stop working if cooling water pressure doesn’t
reach set point.
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