A wax liquid temperature control device of a wax injector is disclosed. In
this device, a coal oil heat exchanger controls the temperature of the
coal oil in a predetermined range. Then, the coal oil is transferred to a
wax liquid temperature control cylinder to control the temperature of the
wax liquid so that the wax liquid is retained in a proper temperature for
being injected to a mold. Therefore, the wax liquid temperature control
device of a wax injector may cool the wax liquid in the mold rapidly.