| 摘要 |
PROBLEM TO BE SOLVED: To provide a mold which can produce a multi-row tube 100 having a plurality of passages 110 having the same inside diameter and a method for producing the multi-row tube. SOLUTION: In the mold 300 which comprises a core part 314 having a plurality of cylindrical tip parts 340 and a die plate 320 having an opening surrounding the tip parts 340 together at a distance from the tip parts 340 and is used when a softened flexible resin is injected from one end of a resin passage 301 formed between the core part 314 and the die plate 320, and the multi-row tube 100 having a plurality of mutually independent liquid passages 110 formed from the flexible resin is extruded from the other end of the resin passage 301, the inner surface shape of an extrusion hole 334 is coaxial with respect to each of the tip parts 340 and has a shape formed by laying a plurality of circles having the same inside diameter to partially overlap each other and connecting them mutually, and the diameter of each of the tip parts 340 of the core part 314, with respect to the arrangement, is larger than or equal to the diameter of the tip part 340 adjacent to the outside. COPYRIGHT: (C)2007,JPO&INPIT |
