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AssigneeSinto Kogio, Ltd.
InventorsTakeo Nakagawa, Hiroyuki Noguchi, Akira Yanagisawa, Toyoji Fuma, Masanobu Tsuchida, Takehiro Inagaki, Yoshikazu Hayashi
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Proposed models are used for forming into destined shapes liquid, slurry, soft, sheet or lump materials, and are provided with endurance for many times of use and excellent permeability. A basic feature is that aggregates are ferrous or non-ferrous metallic grains and ceramic grains, to which a binder contained in evaporating or consumable substance is added and kneaded, and sintered. The mode has a close hardened layer scattered with metallic oxides on at least a shell. The hardened layer has fine air vents in its thickness. The whole body of a model is 5 to 60% of porosity and more than 100 Kg/cm.sup.2 of compression strength.
Composite and durable forming model with permeablity, comprising a composite sintered product where aggregates are metallic grains and ceramic grains, said composite sintered product having a close hardened layer which is dispersed with metallic oxides on an outer circumference including at least a model face, and said hardened layer having fine air vents in its thickness by passing of evaporating or consumable substances contained in a binder which is mixed in the aggregates, and wherein an entire body of the model has 5 to 60% porosity and more than 100 Kg/cm.sup.2 compression strength.
Composite and durable forming model with permeability, comprising a composite sintered product of metallic grains, ceramic grains and reinforcing fibers, said composite sintered product having a close hardened layer which is dispersed with metallic oxides and the reinforcing fibers on an outer circumference including at least a model face, and said hardened layer having fine air vents in its thickness by passing of evaporating or consumable substances contained in a binder which is mixed in said substance, and wherein an entire body of the model has 5 to 60% porosity and more than 100 Kg/cm.sup.2.
Dependencies are inferred from the claim text.