A rapid BEM-based method for cooling simulation of injection molding

Zhang, Yun; Huang, Zhaoyang; Zhou, Huamin; Li, Dequn

doi:10.1016/j.enganabound.2014.11.020

Cited by 8 publications

(6 citation statements)

References 38 publications

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“…Recent decades had seen the fast progress in computer simulation methods, and now the numerical simulation has become a powerful method to improve the quality and processing of polymer products [12][13][14][15][16][17][18][19][20][21]. Wang et al [12] adopted FEM and the arbitrary Lagrangian-Eulerian (ALE) method to track the free surface of a polymer melt flow in the filling processing.…”

Section: Introductionmentioning

confidence: 99%

“…Farahani, et al [18] applied the smoothed particle hydrodynamics (SPH) technology to study numerically the hybrid process of sheet metal forming and injection molding. Zhang, et al [19] adopted the boundary element method (BEM) to complete the steady-state cooling simulation. Pashmforoush used Finite Element Analysis to study Carbon Fibers/Carbon Nanotubes Reinforced Polymer Composite [20].…”

Section: Introductionmentioning

confidence: 99%

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Multi-Scale Numerical Approach to the Polymer Filling Process in the Weld Line Region

Wang²,

Saeed³

2022

FU Mech Eng

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In this paper, a multi-scale coupling mathematical model is suggested for simulating the polymer filling process in the weld line region on a micro scale. The model considers two aspects: one is the coupling model based on stresses in the whole cavity region; the other is the multi-scale coupling model of continuum mechanics (CM) and the molecular dynamics (MD) in a weldline region. A weak variational formulation is constructed for the finite element method (FEM), which is coupled with the Verlet algorithm based on the domain decomposition technique. Meanwhile, an overlap region is designed so that the FEM and the MD simulations are consistent with each other. The molecular backbone orientation of the whole cavity is illustrated and the position of the weld line is determined by the characteristics of the molecular backbone orientation. Finally, the properties of the polymer chain in the weld line region are studied conformationally and dynamically. The conformational changes and movement process elucidate that the polymer chains undertake stretching, entangling and orientating. Moreover, the effect of the number of chains and melt temperature on the spatial properties of chain conformation are investigated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-Scale Numerical Approach to the Polymer Filling Process in the Weld Line Region

Wang²,

Saeed³

2022

FU Mech Eng

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“…The accuracy of the results is greatly influenced by the precision of modeling, boundary conditions, and the calculation algorithm. More and more articles deal with the development of the simulation results; Zhang et al [9] developed a novel boundary element method (BEM)-based cooling simulation method for steady-state cooling. The analytical solution of the part temperature was introduced into the BEM, so the random access memory (RAM) size required for the calculations was reduced by 93% on average and calculation time was shortened by one order of magnitude.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Injection Molding Simulation of Advanced Injection Molds

et al. 2017

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Abstract:The most time-consuming phase of the injection molding cycle is cooling. Cooling efficiency can be enhanced with the application of conformal cooling systems or high thermal conductivity copper molds. The conformal cooling channels are placed along the geometry of the injection-molded product, and thus they can extract more heat and heat removal is more uniform than in the case of conventional cooling systems. In the case of copper mold inserts, cooling channels are made by drilling and heat removal is facilitated by the high thermal conductivity coefficient of copper, which is several times that of steel. Designing optimal cooling systems is a complex process; a proper design requires injection molding simulations, but the accuracy of calculations depends on how precise the input parameters and boundary conditions are. In this study, three cooling circuit designs and three mold materials (Ampcoloy 940, 1.2311 (P20) steel, and MS1 steel) were used and compared using numerical methods. The effect of different mold designs and materials on cooling efficiency were examined using calculated and measured results. The simulation model was adjusted to the measurement results by considering the joint gap between the mold inserts.

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“…A injeção é um método de moldagem amplamente utilizado para a fabricação de produtos plásticos (ZHANG et al, 2015). O processo é aplicado na indústria de termoplásticos para produção de peças de variados formatos geométricos complexos ou não, com custo relativamente baixo e alta qualidade dimensional (AGAZZI et al, 2013;LI Z et al, 2018).…”

Section: O Processo De Injeção Plásticaunclassified

“…Sendo assim, diversos autores afirmam que os objetivos da otimização do sistema de refrigeração do molde são basicamente: obter uma distribuição de temperatura uniforme, minimizar o tempo de resfriamento (consequentemente o tempo de ciclo total de injeção), eliminar defeitos nos produtos (garantia de melhor qualidade) e reduzir o custo de fabricação do ferramental. Portanto, projetar os canais de resfriamento é um passo muito importante no projeto do molde e uma grande oportunidade para a busca de novas tecnologias de refrigeração e fabricação (PARK; DANG, 2010;ZHANG et al, 2015;ALTAF et al, 2016;JAHAN;EL-MOUNAYRI, 2016;MARTOWIBOWO;KASWADI, 2017;KUO;XU, 2018).…”

Section: Ciclo De Injeçãounclassified

Melhoria da refrigeração de moldes de injeção plástica usando simulação numérica e projeto para manufatura aditiva (MA)

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A rapid BEM-based method for cooling simulation of injection molding

Cited by 8 publications

References 38 publications

Multi-Scale Numerical Approach to the Polymer Filling Process in the Weld Line Region

Multi-Scale Numerical Approach to the Polymer Filling Process in the Weld Line Region

Enhanced Injection Molding Simulation of Advanced Injection Molds

Melhoria da refrigeração de moldes de injeção plástica usando simulação numérica e projeto para manufatura aditiva (MA)

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