Modeling of the conveying of solid polymer in the feeding zone of intermeshing co‐rotating twin screw extruders

Carrot, Christian; Guillet, Jacques; May, Jean‐François; Puaux, Jean Pierre

doi:10.1002/pen.760331106

Cited by 15 publications

(10 citation statements)

References 8 publications

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“…Solid conveying in twin-screw extruders was studied, mainly for co-rotating extrusion, e.g., by Carrot et al [51], Bawiskar and White [52], Potente et al [53], and Wong at al. [54].…”

Section: Solid Conveying Sectionmentioning

confidence: 99%

Fundamentals of Global Modeling for Polymer Extrusion

et al. 2019

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A review paper is presented on modeling for polymer extrusion for both single screw and twin-screw extrusion. An issue of global modeling is discussed, which includes modeling for solid conveying, melting, melt flow, and co-operation of the screw/die system. The classical approach to global modeling of the extrusion process, which is based on separate models for each section of the screw, i.e., solid transport section, melting and pre-melting sections, and the melt flow section is presented. In this case, the global model consists of the elementary models. A novel continuous concept of global modeling based on CFD (Computational Fluids Dynamics) computations is also presented, and a concept of using the DEM (Discrete Element Method) computation coupled with CFD computations is discussed.

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“…Solid conveying in twin-screw extruders was studied, mainly for co-rotating extrusion, e.g., by Carrot et al [51], Bawiskar and White [52], Potente et al [53], and Wong at al. [54].…”

Section: Solid Conveying Sectionmentioning

confidence: 99%

Fundamentals of Global Modeling for Polymer Extrusion

et al. 2019

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“…al. [10] for self-wiping twin screw machines. Analyzing solids conveying mechanisms in kneading disks is more complicated and it should be noted that in all practical situations melting always commences prior to the kneading disk location.…”

Section: Self-wiping Co-rotating Twin Screw Extruder-solid Conveyingmentioning

confidence: 99%

“…The essentials are worked out in papers of Maillefer [8] and Darnell and Mol [9] and are reviewed in monographs written since that time [2,3]. Solid conveying in co-rotating twin screw extruders seems to have only been considered by Carrot et al [10]. They suggest both pressurized flow and material conveying in the intermeshing region.…”

Section: Introductionmentioning

confidence: 98%

Solids Conveying and Melting in a Starve Fed Self-wiping Co-rotating Twin Screw Extruder

Bawiskar¹,

White²

1995

International Polymer Processing

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A flow visualization study of starve fed solids conveying in single screw and a modular self-wiping co-rotating twin screw extruder is observed inflow visualization experiments. Single screw extruders exhibit forward Archimedean transport of material on the undersides of the screw. Self-wiping co-rotating twin screw extruders conveying forward in the intermeshing region and in the region near the apex between the screws. Observations are reported of the melting of solid pellets and possible melting mechanisms are discussed.

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“…For the characteristic of steady high pressure and low friction effect of positive converying of a piston extruder, which can be used in some special processes, such as solid-state extrusion and powder granulation technology. The counter-rotating twin-screw extruder with the characteristic of positive convegying can increase the efficiency and stability of solid conveying, and improve the feeding capability [5] . The melt gear pump with good capacity of measurement and upbuild pressure has became an important assistant equipment on modern extrution processing [6][7] .…”

Section: Introductionmentioning

confidence: 99%

Characteristics Study of Polymer Melt Conveying Capacity in Vane Plasticization Extruder

Yang

Yin

et al. 2009

Polymer-Plastics Technology and Engineering

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A vane extruder is novel equipment for polymer processing. The materials were conveyed and plasticized by a group of vane plasticization units and the materials suffered normal stress during processing. An analytic model was developed to analyze the conveying capacity of melt in the vane plasticization unit of which the melt can be conveyed positively. The analysis of conveying capacity of melt in the vane plasticization unit shows that the conveying capacity increased with the rotate speed, eccentricity distance, vane width, innerdiameter of stator. And the leakage flow model was developed to show that the leakage flow is increased with the width of leakage gaps but decreased with the apparent viscosity of melt. The experiment results show a linear variation of production with rotating speed, and small dependence effect of production with die pressure variation. INTRODUCTIONThe screw plasticating and conveying equipments based on shear rheology are generally adopted in polymer processing. Processing of plasticating and conveing of screw extruder depend on haulage effect, and solid convying is controlled by friction haulage effect, melt convying is controlled by viscosity haulge effect, in which materiels are dominated by shear stress. So there are many disadvantages on screw processing method, such as thermomechanical experience of plasticating and conveying is long, the energy consumption of plasticating and conveying is high, and the adaptability to diverse materiels is weak.Vibration-induced polymer extruder [1][2][3] in which the vibration force field is applied to the whole process of polymer plasticating extrusion by the axial vibration of the screw has been proved by practice that, compared with the conventional single-screw extruder, the vibration-induced polymer extruder can lessen the energy consumption and

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Modeling of the conveying of solid polymer in the feeding zone of intermeshing co‐rotating twin screw extruders

Cited by 15 publications

References 8 publications

Fundamentals of Global Modeling for Polymer Extrusion

Fundamentals of Global Modeling for Polymer Extrusion

Solids Conveying and Melting in a Starve Fed Self-wiping Co-rotating Twin Screw Extruder

Characteristics Study of Polymer Melt Conveying Capacity in Vane Plasticization Extruder

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