Screw rod temperature control device for plastic extruder

The utility model relates to a screw rod temperature control device for a plastic extruder. The screw rod temperature control device is mounted outside a plastic extruder sleeve to control the temperature of a screw rod inside the sleeve. The screw rod temperature control device comprises a temperature controller, a temperature sensor, a main cylinder, a water circuit pipe, a heating resistance wire, a water inlet pipe, a water outlet pipe and a heating power supply, wherein the temperature sensor is arranged on the screw rod; the main cylinder sleeves the plastic extruder sleeve; the water circuit pipe and the heating resistance wire are arranged inside the main cylinder; the water inlet pipe, the water outlet pipe and the heating power supply are arranged on the main cylinder; a hand valve and a solenoid valve are arranged on the water inlet pipe; the temperature controller is respectively connected with the temperature sensor, the heating power supply and the solenoid valve; the water inlet pipe, the water circuit pipe and the water outlet pipe are connected in sequence; the heating resistance wire is connected with the heating power supply. Compared with the prior art, the screw rod temperature control device has the advantages that the cooling effect is good, the temperature is easy to control, the structure is simple, the cost is low, and the application range is wide.