EXTRUDING DIE MOLDING HONEYCOMB STRUCTURE OF THIN WALL AND EXTRUDING METHOD THEREOF

摘要

PURPOSE: To avoid the abrupt change of the cross section area of a feed hole in a joint with a discharge slot by using an extrusion die in which the feed hole extending longitudinally from an inlet part to an extrusion part is tapered so that the cross-sectional area of the feed hole is reduced from the inlet end toward the outlet end and the cross-sectional shape is also changed. CONSTITUTION: The cross section of an inlet end part is a nearly square shape having an end-cut corner 34 which forms the angle 36 of a fin or a leg part 38. A fluid material block changes its cross-sectional shape smoothly from a nearly square shape at the inlet end part 32 of the feed hole to a cross shape at the outlet end part of the feed hole joined to the inlet of a connected discharge slot part. With the distance from the inlet end part 32, four gradually deepening channels are formed along the feed hole. Excluding the lower part zone between No.56 and No.40, the cross-sectional area and shape change in the longitudinal direction of the block 30.