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Fluid-permeable article producing method

  • US 4,909,300 A
  • Filed: 01/27/1989
  • Issued: 03/20/1990
  • Est. Priority Date: 10/16/1986
  • Status: Expired due to Fees
First Claim
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1. A method of producing a fluid-permeable article which permits a fluid to pass therethrough, comprising the steps of:

  • preparing a casting mold having a cavity;

    preparing a porous ceramic structure consisting of a multiplicity of hollow members which are made of a ceramic material and which are concatenated with each other so as to form a framework having therein a continuous capillary passageway system, said porous ceramic structure having a continuous space which is formed outside said framework and which is defined by outer surfaces of said hollow members;

    placing said porous ceramic structure in position within said cavity of said casting mold;

    pouring a molten metal into said cavity so as to fill said continuous space formed outside framework of said porous ceramic structure, and allowing solidification of a mass of the poured molten metal within said continuous space, together with a mass of the molten metal surrounding said porous ceramic structure within said cavity, to thereby form a cast product as said fluid-permeable article wherein said porous ceramic structure is integrally embedded within the mass of the solidified cast metal, with said continuous capillary passageway system left within said framework of said porous ceramic structure; and

    forming an inlet and an outlet for said continuous capillary passageway system in exposed surface portions of said cast product to permit fluid to pass therethrough.

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