Three-dimensional viscoelastic simulation of the effect of wall slip on encapsulation in the coextrusion process

Liu, Hesheng; Deng, Xiaozhen; Huang, Yibin; Huang, Xingyuan; Li, Mengshan

doi:10.1515/polyeng-2013-0108

Cited by 6 publications

(2 citation statements)

References 10 publications

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“…They studied the influence of viscoelastic properties of adhesives, such as shear rate and second normal stress difference, on the interface curvature of extrudates. Liu et al [10] established a viscoelastic numerical simulation model of double composite extrusion by using the Navier slip model, focusing on the influence of the wall slip coefficient on the deflection degree of the extruder interface. The results show that the deflection degree of the interface increases with the increase of the slip coefficient.…”

Section: Introductionmentioning

confidence: 99%

Viscoelastic Numerical Simulation Study on the Co-Extrusion Process of Tri-Composite Tire Tread

Wang

Zhou

et al. 2023

Materials

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The co-extrusion process is widely used to produce composite tire treads with better performance. This study investigated the rubber co-extrusion flow process and quality influencing factors of tri-composite tire tread through numerical simulation and experimental methods. Here, RPA 2000 rubber processing analyzer was used to carry out rheological tests on the three rubber materials, the PTT viscoelastic constitutive model was fitted, and the fitting curves were in good agreement with the test data. Then, a three-dimensional viscoelastic numerical simulation model of the tri-composite tread co-extrusion process was established using Ansys Polyflow software. The parameter evolution technique is adopted in the model establishment to improve the calculation convergence. In addition, a global remeshing function is used to avoid excessive mesh deformation. A co-extrusion experiment is conducted to verify the model’s accuracy using a tri-screw extruder. The extruded tread size error rate between the experiment and simulation is less than 6%. The variation of the velocity field, pressure field and shear rate field during extrusion is analyzed, and the formation mechanism of die swell is explained simultaneously. Finally, the influence of process parameters (inflow rate and traction speed) and die structure (convergence angle and thickness) on the extruded tire tread shape and quality was investigated, which can provide theoretical guidance for improving tread quality and production efficiency. Furthermore, the numerical simulation method can assist the design of the die plate in enhancing the efficiency of the die plate design.

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Section: Introductionmentioning

confidence: 99%

Viscoelastic Numerical Simulation Study on the Co-Extrusion Process of Tri-Composite Tire Tread

Wang

Zhou

et al. 2023

Materials

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“…Since then, Huang Li and Qian Bainian [2,3] also successfully applied the gas-assisted molding technology in rubber production. In 2001, Liang RF et al [4] applied the gas-assisted molding technology in the polymer extrusion process for the first time and found that the technology could effectively relieve the swell phenomenon of extruded products and improve the quality of the extrusion and co-extruded products [5][6][7][8][9][10]. Current studies of the gas-assisted molding extrusion were mostly focused on numerical simulation and related experimental data were seldom reported.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Process Conditions on the formation of the Gas Layer in the Plastic Profile Gas-assisted Co-extrusion Processes

Liu¹,

Deng²,

Huang³

et al. 2016

Proceedings of the 2015 4th International Conference on Sensors, Measurement and Intelligent Materials

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The gas-assisted co-extrusion molding technology is a new polymer processing molding process integrated with the gas-assisted technology. In the paper, we experimentally explored the effects of several key factors of the gas-assisted co-extrusion molding process with plastic profile on the formation of the stable gas layer. Experimental results showed that in the proper pressure range, the stable gas layer was formed. The relatively lower or higher pressure was not conducive to the formation of the gas layer. The optimal air temperature for the formation of the stable gas layer was close to the melt temperature. In addition, the die temperature, the gas layer thickness, the melt flow, material properties, the external force, and the opening sequence of the extruder screw and pneumatic valve showed the significant effect on the formation of the gas layer.

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Numerical comparison on the influence of geometric size on melt viscosity for conventional and gas-assisted extrusion of plastic micro-tube

Ren

Huang

Xiong

2019

IOP Conf. Ser.: Mater. Sci. Eng.

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Three-dimensional viscoelastic simulation of the effect of wall slip on encapsulation in the coextrusion process

Cited by 6 publications

References 10 publications

Viscoelastic Numerical Simulation Study on the Co-Extrusion Process of Tri-Composite Tire Tread

Viscoelastic Numerical Simulation Study on the Co-Extrusion Process of Tri-Composite Tire Tread

Effects of the Process Conditions on the formation of the Gas Layer in the Plastic Profile Gas-assisted Co-extrusion Processes

Numerical comparison on the influence of geometric size on melt viscosity for conventional and gas-assisted extrusion of plastic micro-tube

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