| 摘要 |
The apparatus comprises a frame (1), an extrusion head (2), a stationary support member (5), an insert (7) arranged about said support member (5) according to a predetermined pitch, a rotary member (8) and it is characterized in that it is provided with support and centring means (19) for the support member (5); said means (19) comprise an assembly of radial elements which are angularly and longitudinaly offset about and along the axis (A) so that the bearing surface of the radial elements on the support member (5) determines a helical contact and the insert (7) may thus be displaced without obstruction in said support and centring means (19). Application particularly to the fabrication of flexible tubes used in the oil industry. |
