Numerical studies of the polymer melt flow in the extruder screw channel and the forming tool

Ершов, С В; Trufanova, N. M.

doi:10.1088/1757-899x/208/1/012018

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…However, only a handful of these publications were concerned with the effect of the surface quality, its replication ability and the applied processing parameters on the final product. Furthermore, no complex study analysing the influence of surface quality on the flow length of a polymer or the effect of flow length on the mechanical properties has yet been completed [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Surface Quality on Flow Length and Micro-Mechanical Properties of Polycarbonate

et al. 2021

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This study describes the influence of polymer flow length on mechanical properties of tested polymer, specifically polycarbonate. The flow length was examined in a spiral shaped mould. The mould cavity’s surface was machined by several methods, which led to differing roughness of the surface. The cavity was finished by milling, grinding and polishing. In order to thoroughly understand the influence of the mould surface quality on the flow length, varying processing parameters, specifically the pressure, were used. The polymer part was divided into several segments, in which the micro-mechanical properties, such as hardness and indentation modulus were measured. The results of this study provide interesting data concerning the flow length, which was up to 3% longer for rougher surfaces, but shorter in cavities with polished surface. These results are in disagreement with the commonly practiced theory, which states that better surface quality leads to greater flow length. Furthermore, evaluation of the micro-mechanical properties measured along the flow path demonstrated significant variance in researched properties, which increased by 35% (indentation hardness) and 86% by indentation modulus) in latter segments of the spiral in comparison with the gate.

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Section: Introductionmentioning

confidence: 99%

“…Many scientists have examined and defined the polymer melt flow in an injection mould. Numerical studies of the polymer melt flow were discussed by Ershov et al [5]. Moreover, a generalized 2D output model of the polymer melt flow was created by Pachner et al [6].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Surface Quality on Flow Length and Micro-Mechanical Properties of Polycarbonate

et al. 2021

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“…To achieve these indexes, the metal die should be reasonably designed and manufactured. The numerical simulation is a good method of designing the die for the plastic pipe [3], which can greatly improve the design efficiency and save the cost of the die manufacture. In this paper, to study the effect of die's compression angle on the traditional extrusion forming of the plastic pipe, the numerical method based on the fluid dynamic software Polyflow was used.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on the effect of the die compression angle on extrusion forming of plastic pipe

2018

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Abstract. The effect of compression angle of die on the extrusion forming of plastic pipe was numerically studied by using the finite element method. Based on the geometric models of plastic pipes with four different compression angles, the extrudate swell results of plastic pipe under the different compression angles are numerically simulated. Numerical results show the extrudate swell phenomenon for the little compression angles are larger than that of the large compression angles. To eliminate the extrudate swell effect and keep the wear-resistant strength of the plastic pipe, the gas-assisted extrusion method was used in this paper. The numerical results fully show that the shear stress of melt was greatly eliminated and the high pressure was still maintained by using the gas-assisted method.

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Development of program-driven plug-in for conical counter-rotating twin screw based on SolidWorks

Dong

Zhang

et al. 2021

Journal of Polymer Engineering

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Owing to the existence of the cone angle, the size of a conical counter-rotating twin screw continuously changes along the axis, so it is not easy to model using SolidWorks. In this study, the parametric design of the modeling process is completed based on the Visual Basic language and a program-driven method. Finally, the SolidWorks program plug-in and user interface are developed to complete the automatic generation of the three-dimensional model of a conical counter-rotating twin screw.

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Numerical studies of the polymer melt flow in the extruder screw channel and the forming tool

Cited by 3 publications

References 4 publications

The Influence of Surface Quality on Flow Length and Micro-Mechanical Properties of Polycarbonate

The Influence of Surface Quality on Flow Length and Micro-Mechanical Properties of Polycarbonate

Numerical study on the effect of the die compression angle on extrusion forming of plastic pipe

Development of program-driven plug-in for conical counter-rotating twin screw based on SolidWorks

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