°~

A typical value fork was found at 400 to 450 W /m2K. This value is in the same range as is found in classical polymer processes.

SCREW COOLING

from the drive end because the shafts remain solid in the feed section. For the proper operation of the rotary joints, radial roller bearings are mounted in the head flange. As it turns out, these bearings are also responsible for guiding the screws and for maintaining accurate clearances between screw flights and barrels. The wear of elements and barrels is minimal. To estimate the cooling effect on the screws, one may use 35% of the barrel cooling power [7].