Heating/cooling system of injection molding machine: The heating system of injection molding machine is used to heat its barrel and injection nozzle, and the barrel of injection molding machine generally uses an electric heating coil as its heating device, which is installed outside its barrel and uses thermocouples for segmented detection. When heat conducts heat through its cylinder wall, it provides a corresponding heat source for the plasticization of materials; Its cooling system is mainly used to cool its oil temperature, because excessive oil temperature can cause various faults, so its oil temperature must be controlled. Another point is that its cooling is required near the discharge port of its material pipe, to prevent the raw material from melting at its discharge port, resulting in the inability of the raw material to be discharged normally.