| 摘要 |
920,943. Compound metal forms; casting composite articles. SUNBEAM CORPORATION. Nov. 13, 1959 [April 16, 1959], No. 38621/59. Classes 83 (1) and 83 (2). [Also in Group XXXVI] A compound metal article comprises an inner skin 18 of stainless steel, a nickel strike 19 on at least one face, a plating 20 of tin, cadmium or silver superimposed on said nickel and an outer layer of aluminium 21 cast, preferably by die-casting on to the plating 20. The dies are kept at a temperature between 500-650‹ F. and preferably between 500-600 ‹ F. The liner, if preheated, is not made hotter than the dies. Details are given of the composition and use of the baths to produce the nickel and the tin, cadmium or silver platings. Details are also given of the type of aluminium alloy to be used, and the casting temperatures. Specifications 772,268, 880,053, 895,860, 895,862 and 895,863 are referred to. |
