Core for speed of material's flow is mounted on cross-shaped holder, with end screw, screw hub with imaginary extension, and orifice,

摘要

The core (e) is mounted on a cross-shaped holder (d) and extends from the end screw (c) to the orifice (g) without forming part of the orifice. At least part of the core is encase in elastic plastic. The cross-sectional surfaces of the core, at a certain point on the core, diminish towards the orifice.