| 摘要 |
PROBLEM TO BE SOLVED: To provide a tool for a multiple hole extruder for extruding a plurality of pipes at the same time and can reduce biased thickness of the pipe. SOLUTION: A tool which extrudes the plurality of pipes W at the same time, provided with a die case 10 wherein a plurality of charging holes 11, 12 are bores, and a plurality of dice bodies 21, 22 equipped to each charging hole 11, 12 and the dice bodies 21, 22, are porthole dies wherein a forming clearance 25 is formed by combining a female die 30 having a baring section 23 which forms an outer circumferential configuration of the pipe W and a male die having a bearing section 43 which forms an inner circumferential configuration.
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