Mold and manufacturing method

Abstract

A mold equipped with a core having a plurality of columnar distal portions branched at a downstream side in the extrusion direction and arranged on a surface and a die having an aperture surrounding the distal portions as a whole with a distance with respect to the distal portions and used in the case where a softened flexible resin is injected from one end of a resin flow path formed between the core and the die and a pipe material having a plurality of liquid flow paths which are mutually independent formed by the flexible resin is extruded from the other end of the resin flow path, wherein the aperture of the die has a shape in which each part of a plurality of circles each having the same axis as a corresponding one of the distal portions and mutually having the same inner diameter are overlapped and mutually connected, and each of a diameter of a distal portion of the core is lager than or equal to a diameter of a distal portion adjacent to the outer side in the arrangement.

Dependencies are inferred from the claim text.