| 摘要 |
<p>The invention relates to an extruder (13, 15, 17) for pellettization machines, characterised in that it provides at least two different kind of holes, respectively first holes (18', 19', 20') having a working or pellettization zone of such length equal to the effective length necessary to the formation of pellets, once tha the feeding material has the necessary humidity, and second holes (18', 19', 20') having a length lower than said effective length, from second holes exiting partially or fully dehydrated, but not thickened incoherent material.</p> |
