Conical twin screw extruder and dehydrator
Conical twin screw extruder and dehydrator
In a conical twin screw extruder in which two rotor shafts having flights on the outer peripheral surfaces thereof and being adjacent to each other in the lateral direction are accommodated in a barrel having a raw material supply port on one side and a raw material discharge port on the other side, and the distance between the rotor shafts and the outside diameters of the flights thereof are gradually reduced from the supply port side to the discharge port side, characteristically, the barrel is provided with a water-removing port for removing water contained in a raw material supplied through the raw material supply port, out of the barrel. The single screw extruder can be applied to raw materials various shapes, sizes, and properties.
To achieve the above-described object, the following means are provided according to the present screw extruder.That is, in a conical twin- screw extruder in which two rotor shafts having flights on the outer peripheral surfaces thereof and being adjacent to each other in the lateral direction are accommodated in a barrel having a raw material supply port on one side and a raw material discharge port on the other aide, and the distance between the shafts of the rotor shafts and the outside diameters of the flights thereof are gradually reduced from the supply port side to the discharge port side.
A conical sheet production extruder can be applied to raw materials with various shapes and sizes, since the nipping performance for a raw material supplied through a raw material supply port is superior, compared to that of a conical single- screw extruder or a parallel twin- screw extruder. The conical twin- screw extruder can compress a water-containing raw material at a high ratio. Thus, the dehydrating effect is high. Accordingly, the conical twin- screw extruder can be used as a dehydrator for a water-containing raw material by providing a water-removing port for the barrel.
Also, there may be provided a dehydrating apparatus comprising a parallel twin screw extruder connected to the above-described conical twin- screw extruder and positioned downstream of the conical twin- screw extruder, the parallel twin-shaft extruder containing a heater for heating the extruder barrel, a dehydrating screen and/or a vent for removing steam provided for the extruder barrel.
In a conical twin screw extruder in which two rotor shafts having flights on the outer peripheral surfaces thereof and being adjacent to each other in the lateral direction are accommodated in a barrel having a raw material supply port on one side and a raw material discharge port on the other side, and the distance between the rotor shafts and the outside diameters of the flights thereof are gradually reduced from the supply port side to the discharge port side, characteristically, the barrel is provided with a water-removing port for removing water contained in a raw material supplied through the raw material supply port, out of the barrel. The single screw extruder can be applied to raw materials various shapes, sizes, and properties.
To achieve the above-described object, the following means are provided according to the present screw extruder.That is, in a conical twin- screw extruder in which two rotor shafts having flights on the outer peripheral surfaces thereof and being adjacent to each other in the lateral direction are accommodated in a barrel having a raw material supply port on one side and a raw material discharge port on the other aide, and the distance between the shafts of the rotor shafts and the outside diameters of the flights thereof are gradually reduced from the supply port side to the discharge port side.
A conical sheet production extruder can be applied to raw materials with various shapes and sizes, since the nipping performance for a raw material supplied through a raw material supply port is superior, compared to that of a conical single- screw extruder or a parallel twin- screw extruder. The conical twin- screw extruder can compress a water-containing raw material at a high ratio. Thus, the dehydrating effect is high. Accordingly, the conical twin- screw extruder can be used as a dehydrator for a water-containing raw material by providing a water-removing port for the barrel.
Also, there may be provided a dehydrating apparatus comprising a parallel twin screw extruder connected to the above-described conical twin- screw extruder and positioned downstream of the conical twin- screw extruder, the parallel twin-shaft extruder containing a heater for heating the extruder barrel, a dehydrating screen and/or a vent for removing steam provided for the extruder barrel.