| 摘要 |
PROBLEM TO BE SOLVED: To provide an extruding die with which a perforated tube material the each hole part of which is minimum is manufactured with high accuracy and stably. SOLUTION: A guide plate 13 on which a guide hole 13a for guiding the flow of a material to be extruded is formed on the upstream side in the extruding direction of a forming gap formed by hole forming parts 5a provided in a row on a mandrel to form the hole part of the perforated tube and an extruding hole 12a for forming the outside of the outer peripheral wall of the perforated tube is arranged. Guiding grooves 13b having outward groove depth in parts of both sides by which the gap parts 5c of the adjacent hole forming parts 5a are formed on this guiding hole 13a. The material to be extruded which enters the guiding grooves 13 is fed into the gap parts 5c and made into partitions between respective hole parts of the perforated tube material. COPYRIGHT: (C)2004,JPO
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