There are over loading protection, malfunction warning, constant-temperature oil circulation in the screw core, barrel oil cooling, vacuum vent-pipe appliance and ration of feed appliance.

• 本机采用直流电机，可控硅无级调速，设有过载保护和故障报警、螺杆芯部油循环恒温、机筒油冷却并装有真空排气管装置和定量喂料装置。