| 摘要 |
PURPOSE:To devise economical production even in case of small amount production of many grades, by covering the surface of a concrete-based matrix with the layers of more than one kind of metals and metal oxides. CONSTITUTION:Matrix bases 9 and 9' having more than one kind of metal layers are set up at the same time when these are prepared by pouring concrete, together with external frame 10, cooling conduit 11, resin pouring conduit 6, pin for preventing mold deviation 12, knock pin 8, etc., for example, for the purpose of preparation of a mudguard of motorbike. The confronting surfaces of the mold bases 9 and 9' are finished smoothly, and in an oven for the purpose of drying these surfaces sufficiently. Thereafter copper is welded to each confronting surface of the matrix bases 9 and 9' by using metal flame sprayer, then after flame spraying the surfaces are grinded with a fine sand paper to obtain sufficiently smooth surfaces. It is also possible to devise the increase of wear resistance by providing on the surface of the mold bases 9 and 9' the copper layers 13 and 13' as the first layer and the plated layer 14 and 14' of nickel chemical plating as the second layer. |
