There is provided an extrusion head that is capable of largely increasing
a production speed rather than a conventional head that extrudes supplies
a high viscous melt-coating composition. In an extrusion head 12 that
comprises a die ring 12 having an exit portion 122 and a nipple 13
arranged in vicinity of the exit portion 122, whereby a core wire passage
131 is provided to an inside of the nipple 13 in an axial direction, and
a high viscous melt-coating composition is pressure-fed into a space,
which is formed by the die ring 12 and the nipple 13, toward the exit
portion 122 while drawing out a core wire W from the core wire passage to
the exit portion, and thus a cord-like coated core wire is extruded from
the exit portion 122 of the die ring while coating the core wire W with
the high viscous melt-coating composition, a stagnation reservoir of the
high viscous melt-coating composition is provided in vicinity of the exit
portion by providing a wall surface 121 perpendicularly to a proceeding
direction of the core wire W at the exit portion 122.