| 摘要 |
PCT No. PCT/CA95/00061 Sec. 371 Date Sep. 19, 1996 Sec. 102(e) Date Sep. 19, 1996 PCT Filed Feb. 9, 1995 PCT Pub. No. WO95/21733 PCT Pub. Date Aug. 17, 1995A method of forming a nickel shell for a mold insert to reproduce an article surface, and a novel nickel shell insert are disclosed. The method comprises securing the article to be reproduced to a base having a perimeter, forming a dam about the perimeter, filling the interior of the dam with a silicone, mounting a register plate over the article within the dam in contact with the silicone, and allowing the silicone to cure whereby the silicone forms a negative master of the article surface, removing the negative master from the article and positioning a steel mandrel over the negative master to define a cavity therebetween, feeding a silicone which is not adherent to the negative master into said cavity to fill the cavity and allowing the silicone to cure whereby the silicone forms a positive master which adheres to the steel mandrel, removing the negative master from the positive master, and depositing a layer of nickel by nickel vapour deposition onto the positive master to form a nickel shell. |
