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Author : D. M. Gao
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (355 download)
Download or read book Numerical Modeling of Mold Filling in Injection Molding written by D. M. Gao and published by . This book was released on 1994 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Huimin Zhan
Publisher :
ISBN 13 :
Total Pages : 254 pages
Book Rating : 4.:/5 (313 download)
Download or read book Numerical Simulation of Mold Filling in Reaction Injection Molding (RIM) written by Huimin Zhan and published by . This book was released on 1993 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Huamin Zhou
Publisher : John Wiley & Sons
ISBN 13 : 0470602996
Total Pages : 40 pages
Book Rating : 4.4/5 (76 download)
Download or read book Computer Modeling for Injection Molding written by Huamin Zhou and published by John Wiley & Sons. This book was released on 2013-03-04 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers a wide range of applications and uses of simulation and modeling techniques in polymer injection molding, filling a noticeable gap in the literature of design, manufacturing, and the use of plastics injection molding. The authors help readers solve problems in the advanced control, simulation, monitoring, and optimization of injection molding processes. The book provides a tool for researchers and engineers to calculate the mold filling, optimization of processing control, and quality estimation before prototype molding.
Author : Chittur Ramanathan Swaminathan
Publisher :
ISBN 13 :
Total Pages : 233 pages
Book Rating : 4.:/5 (786 download)
Download or read book Numerical Modeling of Filling and Solidification in Casting Processes written by Chittur Ramanathan Swaminathan and published by . This book was released on 1994 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive modeling of casting processes requires the development of flexible numerical tools which can handle multiple phenomena (e.g., mold filling, heat t ransfer, solidification phase change, shrinkage, segregation, etc.) occurring in arbitrary geometries. In this thesis, a range of robust and efficient numerical algorithms for the analysis of casting processes is developed. The focus is on methods which can handle coupled filling and solidification. In the first place, modeling of solidification processes and associated phenomena is considered. A consistent set of transport equations governing the solidification of a metallic alloy is presented. On considering increasingly sophisticated versions of these transport equations, a general fixed grid numerical algorithm is developed. Fol lowing this, the usefulness of the algorithm is demonstrated on application to a range of solidification examples taken from recent literature. These include he at conduction driven problems, problems with convection, as well as problems wit h shrinkage and segregation. Next, numerical modeling of the mold filling proces s is considered. A consistent set of transport equations governing the filling o f molten metal into a mold shape is presented. A brief review of existing method s used to track the free surface between the metal and air is provided. The limi tations of existing fixed grid methods, in particular, the requirement for an ex plicit time integration, the need for special procedures to ensure a sharp inter face and the inability to handle arbitrary geometries are discussed. A new fixed grid algorithm which overcomes these limitations is derived. The utility of thi s algorithm is demonstrated on application to a range of example problems. Final ly, the two algorithms are coupled and an analysis tool for concurrent filling, heat transfer and phase change is developed. This tool is used to simulate sand and permanent mold casting processes as well as reaction injection molding of po lymers. Throughout the thesis, the efficiency of the proposed algorithms is demo nstrated on making ample cpu comparisons with previous filling and solidificatio n algorithms. The algorithms developed in this thesis are implemented on both fi nite difference and finite element grids.
Author : Rui Igreja
Publisher :
ISBN 13 : 9783656649243
Total Pages : 126 pages
Book Rating : 4.6/5 (492 download)
Download or read book Numerical Simulation of the Filling and Curing Stages in Reaction Injection Moulding written by Rui Igreja and published by . This book was released on 2014-05-13 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2007 in the subject Engineering - Mechanical Engineering, language: English, abstract: (Thesis in pdf available here: http: //goo.gl/EZzlT6 and here: http: //hdl.handle.net/10773/2419) Commonly used methods for injection moulding simulation involve a considerable number of simplifications, leading to a significant reduction of the computational effort but, in some cases also to limitations. In this work, Reaction Injection Moulding (RIM) simulations are performed with a minimum of simplifications, by using the general purpose CFD software package Ansys CFX, designed for numerical simulation of fluid flow and heat and mass transfer. The Ansys CFX's homogeneous multiphase flow model, which is generally considered to be the appropriate choice for modelling free surface flows where the phases are completely stratified and the interface is well defined, is shown to be unable to model the filling process correctly. This problem is overcome through the implementation of the inhomogeneous model in combination with the free-slip boundary condition for the air phase. The cure reaction is implemented in the code as a transport equation for an additional scalar variable, with a source term. Various transient and advection schemes are tested to determine which ones produce the most accurate results. Finally, the mass conservation, momentum, cure and energy equations are implemented all together to simulate the simultaneous filling and curing processes present in the RIM process. The obtained numerical results show a good global accuracy when compared with other available numerical and experimental results, though considerably long computation times are required to perform the simulations.
Author : Timothy John Spiegelhoff
Publisher :
ISBN 13 :
Total Pages : 244 pages
Book Rating : 4.:/5 (89 download)
Download or read book Modeling and Simulation of High Reynolds' Number Flows During Reaction Injection Mold Filling written by Timothy John Spiegelhoff and published by . This book was released on 1992 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peter K. Kennedy
Publisher : Hanser Pub Incorporated
ISBN 13 : 9781569905128
Total Pages : 349 pages
Book Rating : 4.9/5 (51 download)
Download or read book Flow Analysis of Injection Molds written by Peter K. Kennedy and published by Hanser Pub Incorporated. This book was released on 2012-09-30 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: Given the importance of injection molding as a process as well as the simulation industry that supports it, there was a need for a book that deals solely with the modeling and simulation of injection molding. This book meets that need. The modeling and simulation details of filling, packing, residual stress, shrinkage, and warpage of amorphous, semi-crystalline, and fiber-filled materials are described. This book is essential for simulation software users, as well as for graduate students and researchers who are interested in enhancing simulation. And for the specialist, numerous appendices provide detailed information on the topics discussed in the chapters.
Author : Rong Zheng
Publisher : Springer Science & Business Media
ISBN 13 : 3642212638
Total Pages : 194 pages
Book Rating : 4.6/5 (422 download)
Download or read book Injection Molding written by Rong Zheng and published by Springer Science & Business Media. This book was released on 2011-06-21 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers fundamental principles and numerical methods relevant to the modeling of the injection molding process. As injection molding processing is related to rheology, mechanical and chemical engineering, polymer science and computational methods, and is a rapidly growing field, the book provides a multidisciplinary and comprehensive introduction to the subjects required for an understanding of the complex process. It addresses the up-to-date status of fundamental understanding and simulation technologies, without losing sight of still useful classical approaches. The main chapters of the book are devoted to the currently active fields of flow-induced crystallization and orientation evolution of fiber suspensions, respectively, followed by detailed discussion of their effects on mechanical property, shrinkage and warpage of injection-molded products. The level of the proposed book will be suitable for interested scientists, R&D engineers, application engineers, and graduate students in engineering.
Author : Liyong Yu
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (548 download)
Download or read book Experimental and Numerical Analysis of Injection Molding with Microfeatures written by Liyong Yu and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Injection molding has great potential for mass production of polymer products with microfeatures. In this study, injection molding with micro-features is investigated experimentally and numerically. Different methods were used to fabricate tool steel, photoresist and nickel mold inserts for injection molding with micro-features. Experiments have been conducted and analyzed for the radial flow case and the unidirectional flow case. Simulations based on 2.5D software packages for are preformed. Both numerical simulation and experimental results showed that the injection speed, feature width and mold temperature are important for mold filling. However, conventional midplane simulation is found to be inappropriate for multi-scale structures, typically found in micro-injection molded parts. For the unidirectional flow, an x-z planar simulation based on the general momentum equation is able to achieve better efficiency than 3D simulations. A hybrid numerical technique is developed, which can significantly reduce the computation cost, and yet provide good flow simulation around the microfeatures. The mold-melt heat transfer coefficient and injection speed are shown to be very important factors in determining the filling depth in microstructures. Different choices of the value of the constant heat transfer coefficient give very different results. Therefore, a local heat iii transfer model is collaborated in our code. It produces good prediction in our simulation. However, it may not include all effects. Wall-slip may also contributes to the filling length in microchannels. A decrease of the heat transfer coefficient and the occurrence of wall-slip are likely to occur in micro channels. Further investigations are needed.
Author : Huamin Zhou
Publisher : John Wiley & Sons
ISBN 13 : 1118444914
Total Pages : 40 pages
Book Rating : 4.1/5 (184 download)
Download or read book Computer Modeling for Injection Molding written by Huamin Zhou and published by John Wiley & Sons. This book was released on 2012-11-30 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers a wide range of applications and uses of simulation and modeling techniques in polymer injection molding, filling a noticeable gap in the literature of design, manufacturing, and the use of plastics injection molding. The authors help readers solve problems in the advanced control, simulation, monitoring, and optimization of injection molding processes. The book provides a tool for researchers and engineers to calculate the mold filling, optimization of processing control, and quality estimation before prototype molding.
Author : Sang-Woo Kim
Publisher :
ISBN 13 :
Total Pages : 156 pages
Book Rating : 4.:/5 (89 download)
Download or read book Three-dimensional Simulations for the Filling Stage of the Polymer Injection Molding Process Using the Finite Element Method written by Sang-Woo Kim and published by . This book was released on 2005 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peter Kennedy
Publisher : Carl Hanser Verlag GmbH Co KG
ISBN 13 : 1569905223
Total Pages : 381 pages
Book Rating : 4.5/5 (699 download)
Download or read book Flow Analysis of Injection Molds written by Peter Kennedy and published by Carl Hanser Verlag GmbH Co KG. This book was released on 2013-04-04 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Given the importance of injection molding as a process as well as the simulation industry that supports it, there was a need for a book that deals solely with the modeling and simulation of injection molding. This book meets that need. The modeling and simulation details of filling, packing, residual stress, shrinkage, and warpage of amorphous, semi-crystalline, and fiber-filled materials are described. This book is essential for simulation software users, as well as for graduate students and researchers who are interested in enhancing simulation. And for the specialist, numerous appendices provide detailed information on the topics discussed in the chapters. Contents: Part 1 The Current State of Simulation: Introduction, Stress and Strain in Fluid Mechanics, Material Properties of Polymers, Governing Equations, Approximations for Injection Molding, Numerical Methods for Solution Part 2 Improving Molding Simulation: Improved Fiber Orientation Modeling, Improved Mechanical Property Modeling, Long Fiber-Filled Materials, Crystallization, Effects of Crystallizations on Rheology and Thermal Properties, Colorant Effects, Prediction of Post-Molding Shrinkage and Warpage, Additional Issues of Injection-Molding Simulation, Epilogue Appendices: History of Injection-Molding Simulation, Tensor Notation, Derivation of Fiber Evolution Equations, Dimensional Analysis of Governing Equations, The Finite Difference Method, The Finite Element Method, Numerical Methods for the 2.5D Approximation, Three-Dimensional FEM for Mold Filling Analysis, Level Set Method, Full Form of Mori-Tanaka Model
Author : D. M. Gao
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (355 download)
Download or read book Numerical Simulation of the Sequential Filling in Injection Molding Process written by D. M. Gao and published by . This book was released on 1994 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J.L. Berger
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (841 download)
Download or read book A NUMERICAL SIMULATION OF THE CAVITY FILLING PROCESS WITH PVC IN INJECTION MOLDING. written by J.L. Berger and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (946 download)
Download or read book Numerical Simulation of the Filling Stage in the Micro-injection Molding Process written by and published by . This book was released on 2003 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James L. Berger
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (115 download)
Download or read book A Numerical Simulation of the Cavity Filling Process in Injection Molding written by James L. Berger and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (946 download)
Download or read book Numerical Simulation of the Mould Filling Stage in Gas Assisted Injection Moulding written by and published by . This book was released on 1996 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
