EXTRUDER

摘要

An extruder has an intake barrel, a degassing drum connected to, downstream from, and coaxial with the intake barrel, and an output barrel connected to, downstream from, and coaxial with the intake barrel and degassing drum. A driven shaft extends through the drum and barrels and is rotated for forming a plastic melt and advancing the melt through the intake barrel, degassing drum, and output barrel. A plurality of degassing screws surround the driven shaft in the degassing drum. A screw guide rotationally fixed to the shaft has respective seats for the degassing screws. Respective drive gears rotationally fixed but removably mounted on the degassing screws are received in respective seats in a gear guide separate from the screw guide and rotationally fixed to the shaft. A ring gear is rotationally fixed but removably mounted in the degassing drum and meshes with the drive gears.

主权项

1. An extruder for producing a polymer melt, the extruder comprising:
an intake barrel extending along an axis and defining a melt-travel direction; a degassing drum connected to, downstream from, and coaxial with the intake barrel; an output barrel connected to, downstream from, and coaxial with the intake barrel and degassing drum; a driven shaft extending along the axis through the drum and barrels; means for rotating the shaft for forming a plastic melt and advancing the melt in a travel direction sequentially through the intake barrel, degassing drum, and output barrel; a plurality of axially extending degassing screws surrounding and angularly spaced around the driven shaft in the degassing drum; a screw guide rotationally fixed to the shaft and having respective seats for the degassing screws; respective drive gears rotationally fixed but removably mounted on the degassing screws; a gear guide separate from the screw guide, rotationally fixed to the shaft, and having respective seats holding the drive gears; and a ring gear rotationally fixed but removably mounted in the degassing drum and meshing with the drive gears.