| 摘要 |
<p>An impregnation die, comprising: a housing including an internal processing chamber and a pultrusion aperture; and a nozzle carried on said housing, said nozzle including an opening having an inlet end, an outlet end and a central axis, said inlet end being in communication with said processing chamber by means of said pultrusion aperture; said impregnation die being characterized by said opening including a first tapered section adjacent said inlet end, a first straight section downstream from said first tapered section, a second tapered section downstream from said first straight section and a second straight section downstream from said second tapered section and adjacent said outlet end.</p> |
