The present utility model provides a liquid injection device and a twin-screw extruder, belonging to the technical field of extrusion, comprising a liquid injection pipe and a valve core. The liquid injection pipe has a pipe cavity, at least one liquid inlet is arranged on the side wall of the pipe cavity, a liquid outlet is arranged at the bottom end of the pipe cavity, and the liquid outlet is used for communicating with the barrel of the twin-screw extruder. The valve core is slidably arranged in the pipe cavity, a liquid injection cavity is formed between the valve core and the pipe cavity, the liquid injection cavity communicates with the liquid inlet and the liquid outlet, an elastic piece is connected to the valve core, and the elastic piece has an elastic force for the valve core to block the liquid outlet. The valve core can overcome the elastic force under the action of the pressure in the liquid injection cavity to open the liquid outlet. In the liquid injection device provided by the present utility model, the liquid injection device can maintain the pressure required for feeding the solution into the barrel, so that the solution is stably fed into the barrel from the liquid outlet, improving the injection accuracy of the solution and the mixing effect of the material and the solution.
Country Code: CN
Application Number: CN202323417708.0
