| 摘要 |
<p>Paste extrusion of lubricated PTFE fine powder is carried out by using the extrusion head (8) of the extruder (2) as the ram for forcing the powder through the extrusion orifice in the extrusion head (8), i.e. the extrusion head is moved against the powder, whether in particle form or preform form, to cause the extrusion.</p> |
