| 摘要 |
PURPOSE:To smoothly replace resin without generating a weld line by providing a manifold bent from a resin inlet toward a circumferential direction of a surface of a core bar, and disposing an end of the one manifold under the inlet as a starting point of the other manifold. CONSTITUTION:A manifold 24 of a semicircular sectional shape bent in an extruding direction by a predetermined curvature while gradually reducing a sectional area of a passage at a predetermined ratio toward a circumferential direction with a resin inlet 22 as a starting point on an outer surface of a core bar 16. An end 40a of the manifold 24 to be started at the one resin inlet 22a as a starting point is disposed under the other resin inlet 22b. Similarly, an end 40b of the manifold 24b to be started at the inlet 22b as a starting point is also disposed under the one inlet 22a. |
