Method and apparatus for extruding large honeycombs

摘要

Extrusion die apparatus and an extrusion method for extruding large-cross-section honeycomb structures from plasticized ceramic batch materials are described, the apparatus comprising a die (10) having a support rod (14) connected to its central portion, the support rod being anchored to support means (18) upstream of the die. The support rod (14) and support means (18) act to limit die distortion during extrusion, reducing die strain and stress to levels permitting large honeycomb extrusion without die failure. Dies of optimal thickness are disclosed which reduce the maximum stresses exerted on the die during extrusion. <IMAGE>