METHOD FOR MANUFACTURING MOLD

• Main Authors: CHIKUGO, KAZUYOSHI, UKAI, HIDEMI, MURAKAMI, KOICHI, OGAWA, KOSHICHI
• Format: Patent
• Language: English; French; Japanese
• Published: 16.09.2004
• Edition: 7
• Subjects: APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE; ARTIFICIAL STONE; BANDAGES, DRESSINGS OR ABSORBENT PADS; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CEMENTS; CERAMICS; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DENTISTRY; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; FOUNDRY MOULDING; HUMAN NECESSITIES; HYGIENE; LIME, MAGNESIA; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES; MEDICAL OR VETERINARY SCIENCE; METALLURGY; METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; PROSTHESES; REFRACTORIES; SLAG; TRANSPORTING; TREATMENT OF NATURAL STONE; TREATMENT OR PROTECTION OF EYES OR EARS

A method for manufacturing a mold (70), which comprises a step of forming a layer (31) of combustible powdery particles (32) around a wax mold (21), which is a lost pattern, a step of forming a film (51) of a ceramic precursor slurry (52) around the wax mold (21) having powdery particles (32) formed thereon, a step of subjecting the resultant product to a heat treatment, to thereby remove the wax mold (21), and a step of firing the slurry film (51), to thereby burn and vanish the powdery particles (32) inside the slurry film (51) and simultaneously form a shell (71). The mold (70) has the shell (71) and a porous layer (74) formed on the surface (76) of the cavity of the shell. The mold can be suitably used for producing a porous article (90) having a porous layer (94) on the surface thereof. L'invention a trait à un procédé de fabrication d'un moule (70), qui comprend les étapes consistant : à former une couche (31) de particules pulvérulentes combustibles (32) autour d'un moule en cire (21), qui est un modèle perdu ; à former un film (51) d'une suspension précurseur de céramique (52) autour du moule en cire (21) sur lequel sont formées des particules pulvérulentes (32) ; à soumettre le produit obtenu à un traitement thermique, afin de retirer le moule en cire (21) ; et à chauffer le film de suspension (51), afin de brûler et d'évaporer les particules pulvérulentes (32) à l'intérieur du film de suspension (51) et de former simultanément une coquille (71). Le moule (70) comporte ladite coquille (71) et une couche poreuse (74) formée sur la surface (76) de la cavité de la coquille. Le moule peut être utilisé pour produire un article poreux (90) possédant une couche poreuse (94) sur sa surface.