Nozzle for ceramic extrusion press - having inserts for modifying extrudate diameter

摘要

In a ceramic extrusion nozzle which is connected by a flange to the press head, the novelty is that (i) the nozzle consists of a basic nozzle (1), which is releasably connected to the press head (3), and concentric inserts (5); (ii) the basic nozzle (1) and the inserts (5) have a funnel shape diverging towards the wall of the press head (3), the cone angle (alpha) of the funnel shape being 100-130 (pref. 120) deg.; and (iii) the insert diameters are graduated according to the requisite extrudate diameters.