| 摘要 |
A vacuum extrusion line includes a vacuum chamber (10) having an extrusion d ie (18) at one end and a water baffle immersion cooler (20) at the other end for extracting the extrudate to atmosphere, extrudate shaping and sizing equipment (62, 63, 64) downstream of the die (18), a large diameter fixed bulkhead (16) at the die (18), first (4 4) and second (46) large diameter movable sections surrounding the shaping and sizing equipment (62, 63, 64), and a smaller fixed section (24) of the chamber (10). The first section (44) sealing against the second section (46) and the fixed section (24) and telescoping over the fixed section to form a gap (68) with the second section (46) being movable within the limits of the gap (68). The second section (46) als o seals against the large diameter fixed bulkhead (16). In this manner the downstream equipment (62, 63, 64) can be fully exposed by movemen t of one or both movable sections (44, 46), and adequate volume and spatial working environment is provided for large through-put.</S DOAB> |
