Composite and durable forming model with permeability

Details Composite and durable forming model with permeability Composite and durable forming model with permeability

B - Operations, Transporting

29

C

18/1201

B29C 33/10 (2006.01) B22C 9/06 (2006.01) B22F 5/00 (2006.01) B28B 1/26 (2006.01) B29C 33/38 (2006.01) B29C 51/36 (2006.01) C03B 9/34 (2006.01) C03B 9/48 (2006.01) C03B 19/02 (2006.01)

Patent

CA 1266159

ABSTRACT OF THE DISCLOSURE Composite models are used for forming into predetermined shapes and are provided with durability for repeated use and excellent permeability. The aggregates are ferrous or non ferrous metallic grains and ceramic grains, to which a binder containing an evaporating or consumable substance is added and kneaded, and sintered. The model has a close hardened layer scattered with metallic oxides on at least an outer 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 of compression strength.

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