PURPOSE: To produce precision parts by using all kinds of metal and/or ceramics powders.
CONSTITUTION: A binder aqueous solution is mixed with a powder of materials including hard-to-cut materials, such as stainless steel, titanium, and ceramics. The resulting raw material powder 1 is subjected to isostatic pressing on the basis of pressurization by compressed air by means of a silicone rubber mold disposed in a hermetically sealed box to form a block-shaped powder compact 2. Water is evaporated from this block-shaped powder compact 2 by vacuum drying, by which a material block 3 of solidified powder is formed. This material block of solidified powder is machined by means of a three-dimensional working machine 18 based on CAD design deta, etc., by which precision parts 19 of solidified powder are formed. Then, the parts are impregnated with a hardener and hardened, by which precision parts 20 of hardened powder can be obtained. By this method, the precision parts, such as mold for synthetic resin molding, excellent in precision and durability can be produced in a short time at a low cost by using all kinds of metal and/or ceramics materials including unmachinable materials.
MATSUNAGA NOBORU
TAWADA ATSUSHI
