DIE FOR EXTRUSION MOLDING, PRODUCTION METHOD FOR DIE FOR EXTRUSION MOLDING, EXTRUSION MOLDING DEVICE, AND PRODUCTION METHOD FOR HONEYCOMB STRUCTURE

• Main Authors: KAWANO SHUICHI, ANDO KIYOTAKA
• Format: Patent
• Language: English; French; Japanese
• Published: 03.10.2013
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; PERFORMING OPERATIONS; SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; WORKING CEMENT, CLAY, OR STONE; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The die for extrusion molding of the present invention is provided with a first surface, a second surface that is formed opposite the first surface, a raw material supply section comprising a first through hole that is formed from the first surface toward the second surface, and a molded section comprising a second through hole that is formed from the second surface toward the first surface so as to communicate with the first through hole, and is characterized by the formation of a nitride layer on the inner wall surface of the second through hole in the molded section. La filière pour moulage par extrusion de la présente invention est pourvue d'une première surface, d'une seconde surface qui est formée à l'opposé de la première surface, d'une section de fourniture de matériau brut comprenant un premier trou traversant qui est formé à partir de la première surface vers la seconde surface, et d'une section moulée comprenant un second trou traversant qui est formé à partir de la seconde surface vers la première surface de façon à communiquer avec le premier trou traversant et est caractérisé par la formation d'une couche de nitrure sur la surface de paroi interne du second trou traversant dans la section moulée.