HONEYCOMB STRUCTURE EXTRUDING METHOD, ITS EXTRUDING DEVICE AND ITS EXTRUDING MASK

摘要

An extrusion die mask for use in the extrusion of honeycomb structures has a mask 12 which includes a stationary portion 13 with an orifice 38 extending longitudinally therethrough. A movable recess means 42 is provided which forms a recess communicating between the outlet face 16 of an extrusion die 10 and the central orifice 38 which receives and compacts extruded batch material from the die to form the skin of the extruded honeycomb structure. An adjustment means 46 is provided for controlling the depth of the recess whereby the amount of material directed to the skin of the structure may be varied as batch viscosity varies and as product requirements indicate.