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pISSN : 1598-706X / eISSN : 2288-8381


한국주조공학회지 (22권5호 265-270)

Study of Manufacturing Jewelry Master Pattern by Using the DuraForm Rapid Prototyping Mold and the Low Melting Alloy

쾌속조형 듀라폼몰도와 저융점합금을 이용한 주얼리용 마스터패턴 제작에 관한 연구

Youngcheol Joo, Ohsung Song*

Soonchunhyang University, *The University of Seoul


A novel jewelry master pattern manufacturing process which reduces manufacturing steps by employing a Duraform rapid prototyping mold and a low melting alloy has been suggested. The novel process follows the steps of ‘jewelry 3D CAD design Durafrom RP mold -> low melting alloy master pattern‘ while the previous process follows more complicated steps of ‘jewelry idea sketch->detailed drawing-*wax carving->flask~>silver master pattem.' An upper and a lower part of molds have been man- ufactured of Duraform powder, of which melting point is 190°C. A rnaser pattern was manufactured by pouring a low melting alloy of Pb-Sn-Bi-Cd, so called Woods Metal, of which melting point is 70°C, into the mold. The master pattern is a shape of a disk of 20 mm diameter that contains various design factors. The variations of dimensions, surface roughness, surface pore ratio were measured by an optical microscope, a surface roughness profilometer, and a Rockwell hardness tester. The pattern made of low melting alloy has sufficient surface hardness, roughness, and surface pore ratio to be used as the jewelry master pattern.


Casting, Jewelry, Low melting alloy, Master pattern, Rapid prototyping