The utility model discloses a feeding device for a plastic extruder, comprising an extruder and a feed port arranged at the end of the extruder. A hopper is mounted at the feed port, and one side of the feed port is provided with an inlet connected to a downward-inclined screw feeder. A return port is arranged at the end of the screw feeder casing, and a downward-inclined cyclone separator is mounted at the return port. A negative pressure pipe is connected to the inlet of the cyclone separator. The utility model has a simple structure. After waste edges cut by a cutter during winding are pelletized by a pelletizer, they are collected online into the cyclone separator through a negative pressure pipe, and then the waste and raw materials are fed into the extruder together through the screw feeder and the hopper, and then sent to the blow molding machine, saving time, labor and resources and improving production efficiency. Moreover, the screw feeder and the cyclone separator are respectively arranged downwardly inclined, improving the speed and efficiency of material return.
Country Code: CN
Application Number: CN201420308636.8
