| 摘要 |
PURPOSE:To manufacture a porous metallic body having high porosity by feeding molten metal forcibly into voids of sintered body of inorganic compound granules which are dissolved with a suitable solvent, coagulating it and thereafter dissolving the inorganic compound in the solvent to remove the compound. CONSTITUTION:The surface of powder such as NaCl, KCl, NaNO2, BaCl2, etc. having 10-150mu grain size is wetted with a saturated soln. of these inorganic salts whose solvent is e.g. water, alkali, acid, alcohol and acetone, etc. After the powder is pressed and molded to a prescribed form with a pressing method or the like, it is heated and dried to make a porous molded body of said inorganic compound soluble in the solvents. The porous molded body 3 is set in a mold 1 and the melt of metal such as cast iron, Pb, Zn, Sn, Al, Au, Ag, Cu or the alloy thereof is poured therein and the melt is pressurized from the upper part with a punch 4 to impregnate the melt in the many pores of said porous molded body 3 and to coagulate the melt. Then, the inorganic compound is dissolved with the above-mentioned solvent and removed to manufacture the porous metallic body having high porosity.
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