Polyurethane weighing and metering device

The utility model relates to a polyurethane weighing and metering device which comprises a machine frame, a weighing device is arranged on the machine frame, a material weighing barrel matched with the weighing device is arranged at the upper end of the weighing device, a driving motor is arranged at the upper end of the material weighing barrel, a rotating rod is arranged in the material weighing barrel in a rotating connection mode, and a scraper set matched with the material weighing barrel is arranged on the rotating rod. The driving motor is connected with the rotating rod in a matched mode, a collecting box is arranged at one end of the rack, a suction pump is arranged at one end of the collecting box, a collecting pipe is arranged at one end of the suction pump, the other end of the collecting pipe is located in the weighing barrel, and the collecting box, the suction pump and the collecting pipe are communicated. The feeding accuracy is affected, the production quality is guaranteed, excessive materia