公开(公告)号：US5403374A

公开(公告)日：1995-04-04

申请号：US889859

申请日：1992-05-28

申请人： Nobuyuki Kitagawa ,  Toshio Nomura ,  Yoichi Yaguchi ,  Hidehiro Uchiumi ,  Naoko Iwashimizu

发明人： Nobuyuki Kitagawa ,  Toshio Nomura ,  Yoichi Yaguchi ,  Hidehiro Uchiumi ,  Naoko Iwashimizu

IPC分类号： A44C5/00 ,  A44C5/02 ,  A44C5/10 ,  B22F3/22 ,  B22F5/10 ,  C22C1/04 ,  C22C1/05 ,  C22C29/02 ,  G04B37/22 ,  C22C29/04 ,  B22F1/00

CPC分类号： B22F3/225 ,  B22F3/22 ,  C22C29/02 ,  G04B37/221 ,  B22F2998/00

摘要： A watch exterior part is formed of cemented carbide or stellite alloy, and has a three-dimensionally curved as-sintered surface or a small hole with an as-sintered interior peripheral surface, or has a three-dimensionally curved polished surface obtained by polishing an as-sintered surface. The watch exterior part is manufactured by a method in which organic binder is milled into a material powder, and a molded body obtained by injection molding is subjected to a binder removing process and then sintered. By the manufacturing method, a watch exterior part formed of cemented carbide or stellite alloy has a high strength and a complicated configuration such as a three-dimensional curved surface and a small hole, without applying secondary machining operations such as discharge operations.

摘要翻译： 手表外部部件由硬质合金或钨铬钴合金形成，并且具有三维弯曲的烧结表面或具有烧结内周面的小孔，或具有通过抛光获得的三维弯曲抛光表面 烧结表面。 手表外部部件通过将有机粘合剂研磨成材料粉末的方法制造，并通过注射成型获得的成型体进行粘合剂除去工序，然后烧结。 通过该制造方法，由硬质合金或钨铬钴合金形成的手表外部部件具有高强度和复杂的构造，例如三维曲面和小孔，而不需要诸如放电操作的二次加工操作。