Nozzle used for extruding ceramic components with honeycomb structures has pipes fitted into the ceramic material supply holes in such a way that the pipe top sections are distanced from the supply hole bottom sections

摘要

The nozzle (1) has exit slits (4) and supply holes (2) for the ceramic material, and pipes (3) fitted at least into some of the supply holes. The pipes are fitted in such a way that their top sections (3a) are distanced from the bottom sections (2a) of the supply holes. Preferred Features: The levels of the pipe top sections (3a) coincide with the levels of the top sections (4a) of the exit slits (4). The pipe seating section (11) has a larger diameter than the supply hole (2). Alternatively the pipes are fitted in the supply hole (2) not provided with a seating section with a larger diameter. In this case the pipes are provided with an outside collar which restricts the movement of the pipes towards the bottom sections (2a) of the supply holes. Support elements are proved to ensure that such a collar rests on an even surface. Secondary support elements ensure that the pipes cannot move in the direction of the open end of the supply holes. Surface coating elements are applied to the exit slits and to the supply holes. This takes place in such way that the pipes (3) are pressed into the supply holes.