Manufacture of metal mold by metal thermal spray and electroforming

Abstract

Abstract PURPOSE:To obtain a titled mold having excellent strength, precision, and durability by applying Ni electroforming to a model obtained by precision casting, and backing up a shell formed by spraying high-melting point metal. CONSTITUTION:A product model 1 is enclosed with a steel frame 2, and a low- melting point metal is sprayed to form a metallic layer 3. The melt of a ternary or quaternary alloy of Sn, Bi, In, etc. is poured into a reversed mold 5 obtained by releasing the model 1, cooled, and released to obtain the second precisely cast model 7. Ni electroforming 8 is applied on the surface of the second model 7, and a sprayed layer 9 is formed by bonding spraying a high-melting point metal such as stainless steel. The second model 7 is heated, melted, and released to obtain a hard metal shell 9. The shell 9 is fixed to a mold base 10, and the space on the rear side is backed up 11 with molten metal or a sprayed metal film, etc. A cooling water pipe 12 is embedded in the backup part 11. The metal mold is completed by finishing the recessed surface of the shell 9 with polishing.

Inventors

• 👤 Masuzo Hamamura
• 👤 浜村　益三

Bibliographic Details