twin screw extruder news

twin screw extruder news

twin screw extruder news

A counter-rotating twin screw extruder includes a motor that generates power through speed reduction of a gear box to directly or indirectly drive two symmetric screw shafts inside an enclosure barrel for synchronous but opposite rotations. Each screw shaft is fit with at least one section of screw and the two screws forms screw flight that are set in opposite directions and alternating each other. The barrel contains therein at least one flow restriction die. A bearing box is set between the barrel and the gear box. The purpose is to reduce unnecessarily induced mechanical energy during the conveyance of material and the advantages of using an independent bearing box are that manufacturing costs are reduced and consumption of energy is cut down. Parts wearing is reduced and durability is enhanced to eventually realize carbon reduction and energy saving.

1. Counter-rotating twin screw extruder, comprising: a barrel, which is mounted on a frame and has at least one inlet port and a plurality of heating ports, the barrel having a die plate at the end, the barrel containing therein at least one flow restriction die, which has at least one opening; two shafts, which are arranged in a symmetric manner inside the barrel, each shaft comprising at least one section of screw so as to provide an arrangement of two symmetrically arranged screws, which comprise helical flight that extend in opposite directions and alternate each other; a bearing box, which is set at an end of the barrel and contains therein a plurality of bearings that are arranged in a symmetric manner, the shafts being fit into the respective bearings with ends thereof; a gear box, which is set at one side of the bearing box, the gear box having opposite ends respectively carrying two output spindles and an input spindle, the input spindle being coupled, in a power transmission manner, through a plurality of gears to the two output spindles for driving rotations of the output spindles in opposite directions; and a motor, which is set by one side of the gear box and is directly coupled in a power transmission manner to the input spindle of the gear box.

2. Counter-rotating twin screw extruder according to claim 1, wherein one side of the outlet is provided with a die plate and wherein one side of the die plate is provided with cutter device.

3. The counter-rotating twin screw extruder according to claim 1, wherein the barrel contains therein at least one steam lock set in a radial direction.

4. The counter-rotating twin screw extruder according to claim 1, wherein the flow restriction die set with two symmetrically arranged supporting holes and a plurality of openings and wherein the shafts respectively extend through the supporting holes of the flow restriction die.

5. The counter-rotating twin screw extruder according to claim 1, wherein the flow restriction die is located between two adjacent sections of the screw of each shaft.

6. The counter-rotating twin screw extruder according to claim 1, wherein the flow restriction die is set between a final section of the screw of each shaft and the outlet port.

7. The counter-rotating twin screw extruder according to claim 1, wherein the screw flight of the screws forms a plurality of notches.

8. The counter-rotating twin screw extruder according to claim 1, wherein the input spindle of the gear box comprises a V-belt pulley and the motor is coupled in a speed reduction manner to the V-belt pulley through a V-belt.

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