MOLDING METHOD FOR FIBER-CONTAINING HONEYCOMB MOLDING AND MOUTHPIECE FOR MOLDING

摘要

PURPOSE: To provide a molding mouthpiece of a fiber-containing honeycomb molding which can prevent damage of cells caused by clogging of a passage in the mouthpiece. CONSTITUTION: In a honeycomb molding mouthpiece equipped with a latticed discharge passage 2 and a plurality of supply passages 3 which are connected to an intersection 2a of the discharge passage 2 and supply a fiber-containing honeycomb molding material, an overlapping passage 4 of the two passages is provided at the connected part of the discharge passage and the supply passages. A length L3 in the extruding direction of the overlapping passage is set to be five or above times as long as a groove width W of the discharge passage 2. A part or the whole area in between the entrance ends of the supply passages and the downstream end of the overlapping passage is made to have a taper structure which tapers in the extruding direction. A taper angle a of the taper structure is set to 2 deg.<=α<=20 deg. and preferably to 5 deg.<=α<=10 deg. so as to orient the fibers in the honeycomb material toward the extruding direction.