Download or read book Extrusion Die Design Using Finite Element Method for Sheet and Pipe Dies written by Yihan Huang and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Extrusion Dies for Plastics and Rubber written by Christian Hopmann and published by Carl Hanser Verlag GmbH Co KG. This book was released on 2017-04-10 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: This definitive book provides a comprehensive account of the full range of dies used for extrusion of plastics and elastomers. The distinctive features of the various types of dies are described in detail. Expert advice on the configuration of dies is given, and the possibilities of computer-aided design, as well as its limitations, are demonstrated. Fundamentals and computational procedures are clearly explained so that no special prior knowledge of the subject is required. The mechanical configuration, handling, and maintenance of extrusion dies are described. Calibration procedures for pipes and profiles are also discussed. This book was written for plastics engineers who need daily support in their practical work in industry and science, as well as for students preparing for their professional life. The 4th edition is brought up to date with several important additions, including coverage of multilayer (>15 layer) dies, melt encapsulation, and simulation tools (rheological/thermal CFD simulations).
Download or read book Design of Polymer Extrusion Dies Using Finite Element Analysis written by G.N. Kouzilos and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A computational fluid dynamics (CFD) model has been developed to compute the pressure, temperature, velocity, viscosity and viscous dissipation in the high-density polyethylene (HDPE) extrusion process. The numerical approach agrees fairly well with the experimental data recorded during the extrusion process of the material. The extrusion spider die was designed to produce high-density polyethylene pipes of 32 mm inner nominal diameter and 2.4 mm thickness. In order to investigate if the spider legs are able to perform under the pressure occurred using the maximum flow rate provided by the single screw extruder of this study, a stress analysis was conducted on a single spider leg. This fluid-structure interaction (FSI) problem was solved using the COMSOL Multiphysics software. Finally, the results obtained from the FE analysis were applied in the design and fabrication of the spider die, selecting IMPAX (tool steel) as fabrication material.
Download or read book Die Design for Extrusion of Plastic Tubes and Pipes written by Sushil Kainth and published by Carl Hanser Verlag GmbH Co KG. This book was released on 2017-11-06 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Die Design for Extrusion of Plastic Tubes and Pipes" covers this topic from a uniquely practical perspective. The content draws on the author's over 50 years of experience in the plastics processing industry, most recently as head of the successful extrusion die manufacturing company he established in 1995. His approach is oriented toward solving production problems at the design stage using computer aided techniques for design and simulation of the plastic flow. The book provides a step-by-step guide to extrusion die design, with worked examples to illustrate problem solving. It is shown how important melt flow variables (e.g., pressure drop, shear stress, shear rate, temperature variations, and distribution variations, etc.) of key materials are determined using FEM software. The detailed drawings of complete dies for various applications that are provided constitute a rare and valuable resource. Both mono- and multilayer pipes are covered. Using the proven methods and examples from this book, the reader is well-equipped to understand dies for successful manufacture of tubes and pipes of many types. Contents: Basic Considerations Project Planning Design of a Simple Die Simulation of Melt Flow Spiral Die Monolayer Die for Tubes ∅1 mm to ∅6 mm Monolayer Die for Tubes ∅4 mm to ∅16 mm Monolayer Die for Pipes ∅50 mm to ∅125 mm Monolayer Die for Pipes ∅140 mm to ∅315 mm Coextrusion Pipe Dies Coextrusion Die (∅5 mm to ∅16 mm) Coextrusion Three-Layer Die (∅20 mm to ∅65 mm) Three-Layer-Plus-Striping Die for ∅25 mm to ∅110 mm Pipes Materials for Extrusion Dies
Download or read book Extrusion Dies written by Walter Michaeli and published by . This book was released on 1984 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Finite Element Analysis of a Pipe forming Extrusion Die written by Anthony James Hanford and published by . This book was released on 1986 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Extrusion written by Harold F. Giles Jr and published by William Andrew. This book was released on 2004-12-31 with total page 575 pages. Available in PDF, EPUB and Kindle. Book excerpt: Why is it important to get to equilibrium and how long does it take? Are there problems running polypropylene profiles on a single screw extruder? Does the job involve compounding color concentrates on a corotating twin screw extruder? This unique reference work is designed to aid operators, engineers, and managers in quickly answering such practical day-to-day questions in extrusion processing. This comprehensive volume is divided into 7 Parts. It contains detailed reference data on such important operating conditions as temperatures, start-up procedures, shear rates, pressure drops, and safety. This reference is a practical guide to extrusion bringing together both the equipment and materials processing aspects. It provides basic and advanced topics about the thermoplastics processing in the extruder, for reference and training. Parts 1 û 3, emphasize the fundamentals, for operators and engineers, of polymeric materials extrusion processing in single and twin screw extruders. Parts 4 û 7 treat advanced topics including troubleshooting, auxiliary equipment, and coextrusion for operators, engineers, and managers. Extensive applications in Part 7 cover such contemporary areas as compounding, blown film, extrusion blow molding, coating, foam, and reprocessing. Each chapter includes review topics.
Download or read book Design and Analysis of a Polymer Co extrusion Die Using the Finite Element Method written by Madiajagane Rathinavelu and published by . This book was released on 1984 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Finite Element Analysis of Flow in Shape Extrusion Dies and Design of Graphical User Interface for PcStream written by Prashant Gosavi and published by . This book was released on 1996 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Automated Optimization of Polymer Extrusion Dies Using Finite Element Analysis written by James Allen Peitzmeier and published by . This book was released on 2012 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optimization of Modular Die Design in Extrusion Process written by Tushar P. Bakhtaiani and published by . This book was released on 2015 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aluminum extrusion is a metal forming process used for the production of a large variety of solid, semi-solid and complex hollow products. During extrusion, the hot aluminum billet goes under severe plastic deformation as it is forced to flow through a smaller die cavity that defines the final shape of the extruding product. Surface finish and dimensional accuracy are the two most important criteria that specify the productivity and feasibility of the extrusion process which is highly influenced by the flow of aluminum through the deforming die. Therefore, die design is considered as one of the most important characteristics of the extrusion process that influences aluminum flow, quality of the extruding product and its dimensional accuracy. Currently, development of extrusion dies is primarily based upon the empirical knowledge of the die designer gained through trial and error, which inevitability is an expensive, time consuming and ineffective method. However, owing to the technological advancements of this century in the field of finite element modeling, this decade old trial and error method can now be replaced by numerical simulations that not only save time and money but also, can accurately predict the flow of aluminum through a die as well as predict die deformation occurring during the extrusion process The motivation of this research project came from a private extrusion die manufactures need for improving their pioneered modular die based on good analytical and scientific understanding of the dies performance during the extrusion process. In this thesis, a commercial simulation package Deform 3D is used to simulate the thermo-mechanical interactions of aluminum flow through the deforming modular die for the production of Micro Multi-Port (MMP) tubes.
Download or read book Design and Development of Metal Forming Processes and Products Aided by Finite Element Simulation written by Ming Wang Fu and published by Springer. This book was released on 2016-10-22 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents state-of-the-art research on forming processes and formed metal product development aided by the Finite Element Method (FEM). Using extensive and informative illustrations, tables and photographs, it systematically presents real-life case studies and established findings regarding various forming processes and methods aided by FEM simulation, and addresses various issues related to metal formed part design, process determination, die design and die service life analysis and prolongation, as well as product quality assurance and improvement. Metal forming has been widely used in many industries. This traditional manufacturing process, however, has long been linked to many years of apprenticeship and skilled craftsmanship, and its conventional design and development paradigm appeared to involve more know-how and trial-and-error than in-depth scientific calculation, analysis and simulation. The design paradigm for forming processes and metal formed product development thus cannot meet the current demands for short development lead-times, low production costs and high product quality. With the advent of numerical simulation technologies, the design and development of forming processes and metal formed products are carried out with the aid of FEM simulation, allowing all the potential design spaces to be identified and evaluated, and the best design to ultimately be determined and implemented. Such a design and development paradigm aims at ensuring “designing right the first time” and reducing the need for trial-and-error in the workshop. This book provides postgraduates, manufacturing engineers and professionals in this field with an in-depth understanding of the design process and sufficient knowledge to support metal formed part design, forming process determination, tooling design, and product quality assurance and control via FEM simulation. “/p>
Download or read book Computer Modelling of Polymer Processing written by E. Andreassen and published by iSmithers Rapra Publishing. This book was released on 1992 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of computers to numerically analyse polymer processing was first reported as for back as the 1950's, and the first commercial software became available around 20 years ago. Much research has been carried out since that time, and this report aims to summarise contemporary trends in both commercial and academic research and development. An additional indexed section containing several hundred abstracts from the Rapra Polymer Library database provides useful references for further reading.
Download or read book An Object oriented Implementation of Die Design Problems in Metal Forming Processes Using the FEM Method written by Yangang Bao and published by . This book was released on 1999 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress Analysis of a Polymer Extrusion Die Using Finite Element Method written by Ihsan Aladdin Abbud and published by . This book was released on 1982 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimates for the Pressure and Thermal Distortions of Coating Dies for Use in Design and Simulation written by Sneha Shetty and published by . This book was released on 2010 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A coating die is used for distributing liquid in order to apply a uniform film on a solid surface. The fluid flowing through the die cavity can exert a pressure of up to 500,000 Pascal on the die body. This liquid pressure can distort the die and lead to a non-uniform slot opening, which in turn causes non-uniformity in the coating thickness. Distortion of the die can also occur during non-isothermal operation of the die; this is an undesired consequence of delivering liquids at a different temperature than the die itself. The distortions undergone by the die both due to liquid pressure and non-isothermal conditions should be within the manufacturing tolerances for the slot heights in order to maintain uniformity in the coating. The deformation exhibited by a coating die due to pressure loadings is modeled both two-dimensionally and three-dimensionally. A two-dimensional model has lower computational load and is preferred for die design. For the two-dimensional analysis of a coating die, the finite element method is used to determine the deflections due to pressure loadings with a focus on slot heights. A model of low computational load is also developed based on beam theory, and its results are compared with those of the two-dimensional finite element analyses predictions. The beam model is incorporated in a die design and simulation program in which flow and slot deformations are coupled. Two-dimensional finite element analyses due to non-isothermal conditions are also performed on the coating die to give an estimate of the die deflection due to temperature variations within the die. A three-dimensional coating die with varying inner cavity area is modeled and analyzed to check its predictions with those of the two-dimensional finite element analyses and beam theory results. In the literature reviewed, flow distribution is fully coupled to die deformation only for extrusion dies. Extrusion dies are used for extruding melted polymers of very high viscosity. Therefore, the deflections are much larger for extrusion dies than for coating dies. Mechanical adjustments can be used to manage the large deflections in the case of extrusion dies whereas coating dies have to be designed for small deflections comparable to manufacturing tolerances. This is the first time where a coupled analysis has been done for a coating die. This research provides the slot deflections for a coating die subjected to pressure loadings that vary throughout the die length. The model of flow distribution coupled with die distortion incurs low computational load and is intended for use in design and simulation programs. Die design guidelines are developed based on examination of the die dimensions and flow parameters having the greatest effect on slot deflections."--Abstract.
Download or read book Extrusion Die Design for a Novel Copolymer written by Graham David Wells and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of a proven scientific method for the design of calibration dies for the extrusion processing of semi-crystalline polymers has received very little, if any, attention in the past. Previously processing manufacturers have relied upon trial and error techniques coupled with hard gained experience acquired over a number of years. This method of approach was unacceptable to Railko Ltd. for the processing of their oiled acetal copolymer material, designated PV80. This was mainly due to their inexperience in the field of work coupled with the urgency required in launching this material into the market in various forms and sizes. The need for a proven scientific method for the design of extrusion dies was apparent and of paramount importance. This thesis describes a method for the design of rod, tube, and slab dies. The mathematical model developed uses .a 'Lumped Parameter Finite Difference Technique' for the solution of the energy equation. This model allows for the inclusion of the polymers thermal properties with temperature together with flow properties of the polymer melt. Due to the lack of data available on PV80 these properties were obtained experimentally and therefore represent an integral part of the whole project. Typical processing conditions, which were obtained from an extensive and comprehensive experimental programme using a fully instrumented research die and modified production dies have also been allowed for in the mathematical model. The validity of the model has been proven experimentally by means of the fully instrumented research die and the successful design of a number of production dies that are currently in use. The experimental work also provided the opportunity to investigate possible remedies to existing production processing problems and hence enabling the formulation of processing guide lines. Finally, it has been shown by macroscopic and microscopic examination of a number of experimentally obtained extruded samples that the materials bearing characteristics are not dependent upon the processing conditions.
