Patent ID: 7637731
Filing Date: 2009-12-29
Classification: B23P,B28B,B29C,B29L

Abstract:
1. A honeycomb structure body molding die for molding a honeycomb structure body having cells walls formed in a honeycomb shape, a large number of cells surrounded with the cells walls, and a cylindrical outer circumferential skin covering an outer circumferential sidewall, wherein the cell walls and the outer circumferential skin are unitarily formed, comprising: a die main body having material feed bores, through which a molding material is fed, and lattice-shaped slit recesses formed in communication with the material feed bores, respectively, for forming the molding material into a honeycomb configuration; and a guide ring having an upright support section extending from the die main body in an extruding direction of the molding material, and a guide section protruding inward from the upright support section with a clearance spaced from the die main body; wherein the die main body has a stepped section, protruding in the extruding direction of the molding material in an area radially displaced from the guide section and having a slit recess forming surface, which has a central slit recess forming surface, and an outer circumferential slit recess forming surface formed in an outside area around the stepped section; wherein the die main body has a feed bore closing region including a blocking member, closing the material feed bores present in the feed bore closing region to block a supply of the molding material therethrough, which is formed on the outside area around the stepped section in a region covering at least a non-opposing region in which the outer circumferential slit recess forming surface does not face the guide section; and wherein the die main body has a radially outward area outside the feed bore closing region formed with outer circumferential-skin forming material feed passages to feed the molding material to the clearance for forming the outer circumferential skin.