| 摘要 |
An appts. for extruding a polymeric sheet and for feeding the sheet to a collecting device comprises an extruder (11) connected to feed polymer through a rigid conduit (20) to and through a sheet die (21) movably positioned adjacent to the collecting device (24); and a polymer sheet feed control appts. comprising two spaced-apart swivels (22, 23) positioned in the rigid conduit between the extruder and the sheet die. One swivel (22) permits independent swinging movement of the sheet die up and down relative to the extruder. Another swivel (23) permits independent tilting movement of the sheet die relative to the rigid conduit. A power means tilts the sheet die relative to the swivels up and down independently to conform to the height and inclination of the central axis of a roll nip into which the sheet is introduced. |
