| 摘要 |
The invention relates to an extruder screw with an interior temperature control channel leading to the front end of said extruder screw, for carrying free-flowing temperature control media to and from the extruder screw. Said extruder screw also has a screw tip which shuts off the temperature control channel, said temperature control channel being open towards the front. This screw tip is screwed to the front end of the extruder screw, at least one seal being positioned between the two. The aim of the invention is to increase the effectiveness of the seal positioned between the screw part and the screw tip, without complex and expensive measures for precision fitting. To this end, the temperature control channel (12) which is open towards the front, at the front end of the extruder screw (11) is shut off by means of a closing screw (13), an axial seal (16) being positioned in-between. Said closing screw (13) has shaped recesses for engaging the screwing tools in such a way that they interlock, and has an outer thread (18) onto which the screw tip (17) is screwed. |
