User:Trex4321/sandbox/Co-rotating twin screw extruder
![]() | This is not a Wikipedia article: It is an individual user's work-in-progress page, and may be incomplete and/or unreliable. For guidance on developing this draft, see Wikipedia:So you made a userspace draft. Find sources: Google (books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL |
Co-rotating twin screw extruders are a type of extruders used for compounding of plastics[1]: 2–4 and pharmaceuticals [2]: 331–339 , devolatilization of polymers[2]: 263–289 , food processing[2]: 304–329 , production of masterbatch [2]: 230–251 , reactive extrusion [2]: 252–260 : 290–301 and other tasks.
Working principle
[edit]![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Self_wiping_twin_screw_extruder_rotating.gif/220px-Self_wiping_twin_screw_extruder_rotating.gif)
Co-rotating twin screw extruders consist of two screws situated in a barrel which turn in the same direction at the same speed. The basic geometry of these machines is self-cleaning: In a pair of screws, one screw wipes the other one, and the barrel is wiped by the tips of the screws.
Process and machine characteristics
[edit]Quantities of the whole machine
[edit]Twin-screw extruders are characterized by
- Barrel diameter
- Centerline distance
- Total length of their process section , which is usually flexible
- Maximum permissible torque per shaft
- Range of turning speed
Extruder processes in twin screw extruders can be characterized by the following characteristic numbers:
- Volumetric throughput
References
[edit]- ^ Kohlgrüber, Klemens (2020). Co-Rotating Twin-Screw Extruders: Fundamentals. Carl Hanser Verlag. ISBN 978-1-56990-747-4.
- ^ a b c d e Kohlgrüber, Klemens (2021). Co-Rotaging Twin-Screw Extruders: Applications. Carl Hanser Verlag. ISBN 978-1-56990-781-8.
External links
[edit]