| 摘要 |
A method for manufacturing extrudable products wherein the material to be extruded is fed in a powder, pellet or granulate form, by using one or more supply means (6), into a processing cavity consisting of the volumes of the grooves (7) in the rotor (1), of the countergrooves (8) in the stator (2, 3) and of the clearance between them, wherein the crosssectional area of said processing cavity decreases at least partially continuously along the axis of the extruder, and wherein by the relative rotational movement of the stator (2, 3) and the rotor (1) said material is forced to proceed along an x-axis. The frictional heat caused by the shear melts a part of the material forming a bed consisting of mainly unmelted particles and some melt around them, enabling the formation of a processing cavity that is completely filled at a certain cross-section at a distance from the end of the apparatus and hence a rise in the pressure to a level higher than needed for pushing the material through a die later on along the x-axis. |
