| 摘要 |
<p>A flowable material (acid resistant SERICOL 922, resin or FILIA wax) is forced at least partly through the die extrusion aperture, the axial bearing depth around the periphery of the aperture is then reshaped (electro or chemically etched) to correspond to the deformation of the leading surface of the deformable material. Either before or after this reshaping the axial bearing depth around the periphery is adjusted (by profile machining the inlet end of the die or by adding a shaped extension to the die inlet) by amts. dependent on the distance from the centre of the die (axial thickness reduced towards periphery).</p> |
