First, it is necessary to decide whether to use oil or water for heat
conduction. In the allowable range of temperature control, water is
preferred based on its good thermal conductivity.
Classification of Water Temperature Mould Machines Based on
Temperature Control Range
When the temperature requirement of the die does not exceed 95 C,
the working mode of the die temperature machine is non-closed.
When the temperature is higher than 95 C, it is necessary to choose
a closed working mode to ensure certain pressure inside the system
and avoid evaporation of the heat conducting medium. When the mould
is in high temperature, for example, in the process of injection
moulding of thermoplastic materials, accurate and rapid heat
conduction is necessary. This is particularly important for
products with high precision requirements. Temperature moulding
machine is more suitable than oil temperature moulding machine.
When the temperature reaches 200 and the pressure is 16 Bar, the
superiority of the water-type thermostat becomes more prominent.
The temperature control range of the water-type thermostat is 5
~200.
Cooling mode, second selection criterion
When choosing the machine, we should also pay attention to the
cooling mode of the heat conducting medium. The cooling mode is
divided into direct and indirect cooling modes. The indirect
cooling mode uses the cooling circuit separated from the main
circuit. The heat conducting medium used in this cooling mode is
generally oil-type. The heat of the cooling medium is absorbed by
the heat medium and directly enters the exchange valve. The
indirect cooling mode is only used in the oil-type mould
temperature machine because of this cooling mode. The cooling
capacity of this method is not strong. When using this cooling
method, we must ensure the cleaning of cooling water, so as to
avoid the impurities blocking the pipeline and affecting the
temperature control performance of the machine.
