Design of a compounding extruder by means of the SIGMA simulation software

Potente, H.; Bastian, M.; Flecke, J.

doi:10.1002/(sici)1098-2329(199922)18:2<147::aid-adv5>3.3.co;2-o

Cited by 7 publications

(7 citation statements)

References 11 publications

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“…More ambiguously stated similar developments are given by Potente and his coworkers [151,152] in 1996 and 1999 and by Canedo [153] in 1999. A better and more readable presentation of such a development was given by Vergnes [154,155] in 1996-1998.…”

Section: Process Simulation Of Intermeshing Co-rotating Twin-screw Exsupporting

confidence: 64%

Manufacturing of Polymer Blends Using Polymeric and Low Molecular Weight Reactive Compatibilizers

Kim

White

2011

Encyclopedia of Polymer Blends

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During the past 50 years there has been a great increase in the development and production of blends of different polymers because many of them have performed well in new applications. The application areas of the various polymeric material blends systems are limitless and blending of the polymers has also been recognized as a faster and less expensive method of developing a new material than synthesizing a new polymer with a new chemical structure.Reactive blending has been a very attractive blending compatibilization strategy for immiscible polymer blend systems with a wisely selected chemistry since the 1970s. The properties and performance of polymer blends depend on the blend morphology. The morphology of a polymer blend is mainly determined by (i) polymer components, (ii) interfacial reaction, and (iii) mixing process. For a commercial polymer blend manufacturing process, possible maximum production rate, and process controls to minimize energy consumption during a manufacturing process are also required for lowering product cost (Figure 6.1). The major equip ment for manufacturing various kinds of polymer blends is a screw extruder. Understanding of a screw extrusion process design and operation is critical. An intermeshing co-rotating twin-screw extruder is the major continuous processing machine among various screw extruders and is the main subject of discussion in this chapter.Section 6.2 briefly describes reactive blending and compatibilization. We then discuss the mixing and morphology development during polymer melt blending process in Section 6.3. In Sections 6.4 and 6.5 we turn to intermeshing co-rotating twin-screw extrusion technology, including the modeling of a modular intermeshing co-rotating twin-screw extrusion process, and extrusion process design for reactive polymer blending. First Edition. Edited by Avraam I. Isayev.

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Section: Process Simulation Of Intermeshing Co-rotating Twin-screw Exsupporting

confidence: 64%

Manufacturing of Polymer Blends Using Polymeric and Low Molecular Weight Reactive Compatibilizers

Kim

White

2011

Encyclopedia of Polymer Blends

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“…Due to its comparably low computational expense, it is still the only way to develop a simulation of the entire extrusion process. For more detailed information about 1D modeling, please refer to the literature, e.g., (White and Chen, 1994;Potente and Hanhart, 1994;Vergnes et al, 1998;Potente et al, 1999;White et al, 2001;Potente and Kretschmer, 2002;Prat et al, 2002;Choulak et al, 2004;Vergnes and Berzin, 2006;Bahloul et al, 2011;Teixeira et al, 2012;Eitzlmayr et al, 2014b).…”

Section: Introductionmentioning

confidence: 99%

Co-rotating twin-screw extruders: Detailed analysis of conveying elements based on smoothed particle hydrodynamics. Part 1: Hydrodynamics

Eitzlmayr

Khinast

2015

Chemical Engineering Science

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We applied SPH to study the flow in a co-rotating twin-screw extruder. A new model which accounts for the flow in unresolved clearances was presented. We showed detailed results for pressure drop, flow rate and power consumption. We achieved excellent agreement with CFD data for the completely filled state. Detailed results for the partially filled state are included. a b s t r a c tDue to the complex geometry of the rotating screws and, typically, free surface flows in partially filled screw sections, first principles simulations of the flow in co-rotating intermeshing twin-screw extruders using the well-established, mesh-based CFD (computational fluid dynamics) approaches are highly challenging. These issues can be resolved via the smoothed particle hydrodynamics (SPH) method thanks to its meshless nature and the inherent capability to simulate free surface flows. In our previous work, we developed a novel method for modeling the boundary conditions with complex wall geometries, under which SPH could be efficiently applied to complex surfaces of typical screw geometries of extruders. In this work, we employed SPH and our boundary method to study the flow in a conveying element in detail. To address unresolved clearances, we developed a new model that is coupled to SPH and can correctly account for the flow through unresolved clearances. A validation of our approach using CFD data from the literature for a completely filled conveying element indicated excellent agreement. Consequently, we studied the flow in a partially filled conveying element and obtained results for the flow rate, the power input and the axial force with variable filling ratio. A detailed analysis of the corresponding mixing phenomena is presented in Part 2. Our results show that the proposed method is a comprehensive approach to study the flow in different types of screw elements in detail, providing an excellent basis for further development of simplified models of entire extrusion processes.

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“…In recent years, we have developed models of this type for counter-rotating twin screw extruders [30][31][32][33][34], as have researchers in other laboratories for corotating machines [35][36][37].…”

Section: Computationsmentioning

confidence: 99%

A composite model for starve fed single screw extrusion of thermoplastics

Wilczyński

Nastaj

Lewandowski

2013

Polymer Engineering & Sci

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A composite model has been developed to simulate a starve fed single screw extrusion of thermoplastics. The model is based on combining melt conveying models with new melting models. Illustrative computations are made for low-density polyethylene and polypropylene at various operating conditions. Simulations are made for axial fill factor, pressure, temperature, and melting profiles. The results are validated experimentally. POLYM. ENG. SCI., 54:2362-2374, 2014

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Design of a compounding extruder by means of the SIGMA simulation software

Cited by 7 publications

References 11 publications

Manufacturing of Polymer Blends Using Polymeric and Low Molecular Weight Reactive Compatibilizers

Manufacturing of Polymer Blends Using Polymeric and Low Molecular Weight Reactive Compatibilizers

Co-rotating twin-screw extruders: Detailed analysis of conveying elements based on smoothed particle hydrodynamics. Part 1: Hydrodynamics

A composite model for starve fed single screw extrusion of thermoplastics

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