But from the current situation of the situation, the more clockwise rotation, the screw thread will be right. From the screw configuration, the two screws are identical and thread direction is the same..

Different rotating direction of different rotating twin - screw extruder with different rotating twin - screw extruder. It may have two cases of inward rotation and outward rotation.

In the case of the rotating twin - screw extruder, the rotation is less. This is because, for the feeding section, if this section of the thread is not the full meshing, not the aspect and the seal,

When material since the feeding mouth adds screw, under the rotation of the two screw driven, the material will first into the meshing area of the two screws of the radial clearance between and above the two screw formation stacking, thereby reducing the screw groove can use the free space, the influence of screw accept self feeder material, is not conducive to the screw channel as soon as possible full and material is transported forward, namely feeding performance bad, also easy to form a bridge. In addition, the material of the radial clearance of the two screw has a force that separates the two screws from the two screws to the cylinder wall, thus speeding the wear of the screw and the cylinder..

Outward rotation without above disadvantages, when material falls on the screw, material in the two screw drive, soon parted, full of spiral groove, is transported forward and quickly and engine cylinder contact and heat absorption, contribute to the material is heated and molten. In the form, the opposite direction of the two screw threads is opposite to the rotating direction. One is left hand, one is right and the other is symmetrical.. But the two screw of the non - engagement rotating twin - screw extruder is the inward rotation.. About two screws in the machine barrel placed and material conveying direction judgement: intermeshing twin-screw for exactly the same two screws, the material conveying direction of the judge and the same as the single screw to; to the rotating twin screw placement and rotation direction and the material conveying direction is closely related to, the judgment method is: from the feed inlet direction to the head to see, if the two screw outward rotation, in the right-hand side of the screw should be for left-hand thread along the clockwise rotation, in the left of the screw should be for right-hand thread, counterclockwise rotation. The position of the two screws can not be misplaced, otherwise the screw can move the direction of the screw direction and the top of the screw is damaged by the screw.