| 摘要 |
PROBLEM TO BE SOLVED: To execute good wire drawing by preventing a metallic fine wire which is wound around a capstan roller from being rolled in a wire drawing mill for metallic fine wires used in the case of manufacturing the metallic extra fine wire such as, for example, a bonding wire for connecting the electrode on a semiconducter device with an outer lead, especially metallic extra fine wires. SOLUTION: The wire drawing mill is composed so that, a delivery guide member 5 is provided approximately just above a supply bobbin 4 for supplying the metallic fine wire to be worked, the metallic fine wire W supplied through that delivery guide member 5 is wound around between a pair of capstan rollers 2, 3 plural times, the metallic fine wire W is gradually made its diameter thinner with a drawing die group 6a-6d which are arranged between both capstan rollers 2, 3 and the extra fine wire is manufactured. In such a case, between the delivery guide member 5 and the first drawing die 6a, the 2nd guide member 12 for guiding the metallic fine wire W is situated and provided in a position above the first drawing die. |
