| 摘要 |
A rotating drum(1) is mounted on a supporting part(5) which can be heated and/or cooled in specific areas. In the heated(10) and/or cooled(11) areas rapid heat exchange is achieved between these areas and the drum to reduce energy loss. An extruder(2) or similar machine feeds hot plastic extrudate(3) into the heated area(10) and adjoining cooling area(11). In these areas the drum(1) slides on a fluid layer on the surface if the supporting part(5). Hydrodynamic and/or hydrostatic mounting of the drum is achieved by raised parts of the drum surface areas surrounding recessed areas which connect with fluid supply channels. Recessed surface areas may extend from one side of the drum to the other without interruption. Heating and cooling of the support is by heat transfer fluid circulating through heat exchange channels. Heating and/or cooling fluid also acts as the hydrostatic or hydrodynamic bearing fluid. Zones of different hydrostatic pressure may be created on the supporting part using seals or throttling strips between them and connecting each zone to different fluid supply and take-off lines. The thin walled drum is connected to a holding ring at both edges. The rings have a joint face which fits the internal diameter of the drum and a stop collar against which the end face of the drum is axially clamped by fingers. The supporting part is either a hollow cylinder or cylinder segments axially clamped between two flanges and can be set at an angle to its main axis. An independent claim is included for a process for operation of the machine which uses compatible heat transfer fluids in the heating and cooling areas. |
