Composite mold and method for making the same

Abstract

A composite mold includes a mold base and a protective film. The mold base includes a first portion having a molding surface, and the protective film is formed on the molding surface. The first portion is made of a sintered material formed by sintering noble metal particles and tungsten carbide particles. Preferably, the mold base further includes a second portion. The second portion of the mold base is integrally formed with the first portion, and is located distal from the molding surface. The second portion of the mold base is made of a sintered material formed by sintering tungsten carbide particles. Alternatively, the second portion, like the first portion, is made of a sintered material formed by sintering noble metal particles and tungsten carbide particles. The protective film is a noble metal protective layer. A method for making a composite mold is also provided.

Dependencies are inferred from the claim text.