| 摘要 |
A screw conveyor having a propelling device to push a plastic material onto a screw is provided. The propelling device comprises a roller, a rectangular vane, and a guide member, which are disposed above the screw and adjacent a wall of the housing of the screw conveyor. The roller is adapted to rotate about its out axis while its circumferential surface is in contact with the arcuate face of the guide member, so that one end of the vane received slidably in a rectangular slot protrudes from the roller pheriphery to push a plastic material onto the screw, thereby promoting an effective feeding of the plastic material. |
