Patent ID: 7654811
Filing Date: 2010-02-02
Classification: B29C,B29L

Abstract:
1. A mold equipped with a core having a plurality of columnar distal portions which branch from a surface toward a downstream side in the extrusion direction and a die having an aperture which surrounds all the distal portions so as to form a space a predetermined distance from the distal portions where a softened flexible resin is injected from one end of a resin flow path formed in the space between the core and the die and extruded from the other end of the resin flow path in order to form a pipe material having a plurality of independent liquid flow paths, 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 the distal portions of the core are shaped as a row of circular distal portions aligned on the same axis, where the two edge distal portions have a smaller diameter than the distal portions disposed between the edge distal portions.