Flow in a Modular Intermeshing Co-rotating Twin Screw Extruder
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Y. Wang
Abstract
The flow of viscous power law fluids in the various modules of a modular intermeshing co-rotating twin screw extruder. This includes right-handed and left-handed screw elements and kneading disc assemblies with various staggering angles. The calculations are based on hydrodynamic lubrication theory used a new calculation method based on combining methods by Tadmor, Broyer and Gutfinger, and by Griffith. The behavior of a composite twin screw extruder consisting of assemblies of screw and kneading disc elements is investigated and the potential of having a sequence of fully filled and starved regions is considered. The existence of such distribution of polymer and starvation behavior in a twin screw machine was found in experiments with a polyethylene. The material distribution is reasonably well predicted by the non-Newtonian flow model of this paper.
© 1989, Carl Hanser Verlag, Munich
Articles in the same Issue
- Contents
- Contents
- Original Contributions
- New Aspects in the Design of Extruders with a Forced Feeding Section
- Flow of Rubber Compound in a Pin Barrel Screw Extruder
- Foam Processing with Rigid Polyvinylchloride
- A Model for Single-screw Plasticating Extruders
- Effect of Screw Stagger on Mixing in a Tangential Counter-Rotating Twin Screw Extruder
- Mixing, Devolatilization, and Reactive Processing in the a Farrel Continuous Mixer**
- Investigations of the Residence Time and the Longitudinal Mixing Behavior in Counter-rotating Twin Screw Extruders
- Flow in a Modular Intermeshing Co-rotating Twin Screw Extruder
- Continuous Melt Polymerization of Polyetherimides
Articles in the same Issue
- Contents
- Contents
- Original Contributions
- New Aspects in the Design of Extruders with a Forced Feeding Section
- Flow of Rubber Compound in a Pin Barrel Screw Extruder
- Foam Processing with Rigid Polyvinylchloride
- A Model for Single-screw Plasticating Extruders
- Effect of Screw Stagger on Mixing in a Tangential Counter-Rotating Twin Screw Extruder
- Mixing, Devolatilization, and Reactive Processing in the a Farrel Continuous Mixer**
- Investigations of the Residence Time and the Longitudinal Mixing Behavior in Counter-rotating Twin Screw Extruders
- Flow in a Modular Intermeshing Co-rotating Twin Screw Extruder
- Continuous Melt Polymerization of Polyetherimides
