| 摘要 |
A wall of a four-piece mold is made by machining cooling channels (3) into one side (2) of a steel backup member (1). The cooling channels (3) are filled with wax (4) which is then covered with conductive paint or tape (5). A layer of copper (6) is now electroplated onto the side (2) of the backup member (1) with the cooling channels (3), and nickel (7) and chromium (8) are plated over the copper (6) in succession. Upon completion of plating, the wax (4) is removed from the cooling channels (3) by melting the wax (4). Alternatively to machining the cooling channels (3) into the backup member (1), strips of plastic (10) are adhesively secured to the backup member (1) at the intended locations of the cooling channels (3). Copper (6) is plated onto the backup member (1) to the height of the strips (10) which are then removed to form the cooling channels (3). The wall is then completed as before.
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