analyzing and troubleshooting single screw extruders

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Analyzing and Troubleshooting Single-Screw Extruders
Author : Gregory A. Campbell,Mark A. Spalding
Publisher : Carl Hanser Verlag GmbH Co KG
Release Date : 2013-04-04
ISBN 10 : 3446432663
Pages : 800 pages
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Prior extrusion books are based on barrel rotation physics—this is the first book that focuses on the actual physics of the process—screw rotation physics. In the first nine chapters, theories and math models are developed. Then, these models are used to solve actual commercial problems in the remainder of the book. Realistic case studies are presented that are unique in that they describe the problem as viewed by a typical plant engineer and provide the actual dimensions of the screws. Overall, there is not a book on the market with this level of detail and disclosure. The new knowledge in this book will be highly useful for production engineers, technical service engineers working with customers, consultants specializing in troubleshooting and process design, and process researchers and designers that are responsible for processes that running at maximum rates and maximum profitability. Contents: o Introduction & Troubleshooting o Polymer Materials o Introduction to Polymer Rheology for Extrusion o Resin Physical Properties Related to Processing o Solids Conveying o The Melting Process o Fluid Flow in Metering Channels o Mixing Processes for Single-Screw Extruders o Scaling of Single-Screw Extrusion Processes o Introduction to Troubleshooting the Extrusion Process o Contaminations in the Finished Product o Flow Surging o Rate-Limited Extrusion Processes o Barrier and High-Performance Screws o Melt-Fed Extruders

Analyzing and Troubleshooting Single-Screw Extruders
Author : Gregory A. Campbell,Mark A. Spalding
Publisher : N.A
Release Date : 2021-01-05
ISBN 10 : 9781569907849
Pages : 864 pages
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Prior extrusion books are based on barrel rotation physics--this is the first book that focuses on the actual physics of the process--screw rotation physics. In the first nine chapters, theories and math models are developed. Then, these models are used to solve actual commercial problems in the remainder of the book. Realistic case studies are presented that are unique in that they describe the problem as viewed by a typical plant engineer and provide the actual dimensions of the screws. Overall, there is not a book on the market with this level of detail and disclosure. The new knowledge in this book will be highly useful for production engineers, technical service engineers working with customers, consultants specializing in troubleshooting and process design, and process researchers and designers that are responsible for processes that running at maximum rates and maximum profitability. The second edition is brought up to date with a significant amount of new content, as well as minor improvements and correction of errors throughout.The new content includes transfer lines, percolation theory, fillers, and several more case studies.

Extrusion
Author : Harold F. Giles Jr,John R. Wagner, Jr.,Eldridge M. Mount
Publisher : William Andrew
Release Date : 2013-09-21
ISBN 10 : 1437734820
Pages : 636 pages
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The second edition of Extrusion is designed to aid operators, engineers, and managers in extrusion processing in quickly answering practical day-to-day questions. The first part of the book provides the fundamental principles, for operators and engineers, of polymeric materials extrusion processing in single and twin screw extruders. The next section covers advanced topics including troubleshooting, auxiliary equipment, and coextrusion for operators, engineers, and managers. The final part provides applications case studies in key areas for engineers such as compounding, blown film, extrusion blow molding, coating, foam, and reprocessing. This practical guide to extrusion brings together both equipment and materials processing aspects. It covers basic and advanced topics, for reference and training, in thermoplastics processing in the extruder. Detailed reference data are provided on such important operating conditions as temperatures, start-up procedures, shear rates, pressure drops, and safety. A practical guide to the selection, design and optimization of extrusion processes and equipment Designed to improve production efficiency and product quality Focuses on practical fault analysis and troubleshooting techniques

Screw Extrusion
Author : James Lindsay White
Publisher : N.A
Release Date : 2003
ISBN 10 : 9783446196247
Pages : 444 pages
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Screw extruders are the most important of all polymer processing machines There is a need for a comprehensive book on this subject. This book emphazises the understanding of the underlaying principles of screw extrusion, the design and behavior of screw based machines. It helps the enineer t optimize his equipment and enhance production rates. Contents: · Introduction · Fundamentals · Screw Extrusion Technology · Technology of Single Screw Extrusion with Reciprocating Screws · Single Screw Extruder Analysis and Design · Twin and Multiscrew Extrusion

Troubleshooting the Extrusion Process
Author : Maria del Pilar Noriega E.,Chris Rauwendaal
Publisher : Carl Hanser Verlag GmbH Co KG
Release Date : 2019-10-07
ISBN 10 : 1569907765
Pages : 366 pages
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Troubleshooting extrusion problems is one of the most challenging tasks in extrusion operations, requiring a good understanding of the extrusion process and the material properties, good instrumentation, good analysis tools, and a systematic and logical approach. This book addresses all issues crucial in extrusion troubleshooting. Additionally, it includes industrial case studies, richly illustrated with photographs and photomicrographs, used to provide exemplary approaches to efficient problem analysis and problem solving. The interconnectivity between the different relevant knowledge areas such as materials engineering, processing technology, and product development is emphasized. This revised third edition comprises a very significant update, with a great deal of new content, especially focusing on additional case studies as well as new sections on collection and interpretation of extrusion process data, rotational rheometry, the smartphone, how screw design can affect extruder performance, melt temperature variation, recent research on automatic optimization of extruder barrel temperatures, process signal analysis using Fast Fourier Transform, among other topics.

Handbook of Industrial Polyethylene and Technology
Author : Mark A. Spalding,Ananda Chatterjee
Publisher : John Wiley & Sons
Release Date : 2017-10-12
ISBN 10 : 1119159784
Pages : 1410 pages
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This handbook provides an exhaustive description of polyethylene. The 50+ chapters are written by some of the most experienced and prominent authors in the field, providing a truly unique view of polyethylene. The book starts with a historical discussion on how low density polyethylene was discovered and how it provided unique opportunities in the early days. New catalysts are presented and show how they created an expansion in available products including linear low density polyethylene, high density polyethylene, copolymers, and polyethylene produced from metallocene catalysts. With these different catalysts systems a wide range of structures are possible with an equally wide range of physical properties. Numerous types of additives are presented that include additives for the protection of the resin from the environment and processing, fillers, processing aids, anti-fogging agents, pigments, and flame retardants. Common processing methods including extrusion, blown film, cast film, injection molding, and thermoforming are presented along with some of the more specialized processing techniques such as rotational molding, fiber processing, pipe extrusion, reactive extrusion, wire and cable, and foaming processes. The business of polyethylene including markets, world capacity, and future prospects are detailed. This handbook provides the most current and complete technology assessments and business practices for polyethylene resins.

Extrusion of Polymers
Author : Chan I. Chung
Publisher : Carl Hanser Verlag GmbH Co KG
Release Date : 2019-10-07
ISBN 10 : 1569907382
Pages : 488 pages
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The author presents single-screw extrusion technology together with the relevant polymer fundamentals, with an emphasis on screw design. The presentation begins on a physical level, providing an in-depth conceptual understanding, followed by an analytical level with mathematical models. Practical applications of the mathematical models are illustrated by numerous examples. A brief description of twin-screw extrusion technology is also presented. New in the third edition: a novel patented barrier screw design that eliminates shortcomings of all previous barrier screw designs, more descriptive specific screw design guidelines, a scientifically designed pineapple mixing section, and general improvements and corrections. Contents: • Physical Description of Single-Screw Extrusion • Fundamentals of Polymers and Melt Rheology • Theories of Single-Screw Extrusion and Scale-Up • Screw Design and High Performance Screws • Gear Pumps, Static Mixers, and Dynamic Mixers • Die Design • Viscoelastic Effects in Melt Flow • Special Single-Screw Extruder with Channeled Barrel • Physical Description of Twin-Screw Extruders

Understanding Extrusion
Author : Chris Rauwendaal
Publisher : N.A
Release Date : 2018-12-10
ISBN 10 : 9781569906989
Pages : 251 pages
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"The book provides a practical understanding of basic information on extrusion in a way useful to readers without an engineering degree as well as to those new to the field. It is primarily written for extruder operators, supervisors, technical service personnel, and process engineers. Designed for on-the-job use, it guides the reader step by step through material issues, machinery, processing, and troubleshooting. This revised and extended third edition now also covers interpretation of extrusion process data, analysis of shrink void formation, dimensional variation by melt temperature fluctuations, efficient extrusion, grooved barrel extruder technology, and more. Contents: Extrusion Machinery Instrumentation and Control Complete Extrusion Lines Plastics and Their Properties Important in Extrusion How an Extruder Works How to Run an Extruder How to Troubleshoot Extrusion Problems New Developments in Extrusion and Methods to Increase Efficiency"--

Extruder Principles and Operation
Author : M.J. Stevens,J.A. Covas
Publisher : Springer Science & Business Media
Release Date : 2012-12-06
ISBN 10 : 940110557X
Pages : 494 pages
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This book is intended to fill a gap between the theoretical studies and the practical experience of the processor in the extrusion of thermoplastic polymers. The former have provided a basis for numerical design of extruders and their components, but generally give scant attention to the practical performance, especially to the conflict between production rate and product quality. In practice extruders are frequently purchased to perform a range of duties; even so, the operator may have to use a machine designed for another purpose and not necessarily suitable for the polymer, process or product in hand. The operator's experience enables him to make good product in unpromising circumstances, but a large number of variables and interactions often give apparently contradictory results. The hope is that this book will provide a logical background, based on both theory and experience, which will help the industrial processor to obtain the best performance from his equipment, to recognize its limitations, and to face new problems with confidence. Mathematics is used only to the extent that it clarifies effects which cannot easily be expressed in words; ifit is passed over, at least a qualitative understanding should remain. The approximate theory will not satisfy the purist, but this seems to the authors less important than a clear representation of the physical mechanisms on which so much of the polymer processing industry depends. M. J. STEVENS J. A.

Extrusion of Metals, Polymers, and Food Products
Author : Sayyad Zahid Qamar
Publisher : BoD – Books on Demand
Release Date : 2018-02-28
ISBN 10 : 9535138375
Pages : 220 pages
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Extrusion is a very popular manufacturing process, especially because of its versatility in terms of materials and shapes. Representing the vast and multifaceted field of extrusion, this book contains write-ups on latest developments from experts in the field. Part (A) on Metal Extrusion contains chapters on spur gear manufacturing, stiff vacuum extrusion, and indirect extrusion for subsurface tubular expansion. Part (B) on Food and Polymer Extrusion includes chapters on extrusion cooking of functional foods, changes in nutritional properties in extrusion of cereals, physicochemical changes of starch in extrusion of corn flour, extruded aquaculture feed, optimal design of polymer extrusion dies, and extrusion cooking technology for food products.

Polymer Extrusion
Author : Chris Rauwendaal
Publisher : Carl Hanser Verlag GmbH Co KG
Release Date : 2014-01-16
ISBN 10 : 1569905398
Pages : 950 pages
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Initially published "to bridge the gap between theory and practice in extrusion," this 5th edition of Polymer Extrusion continues to serve the practicing polymer engineer and chemist, providing the theoretical and the practical tools for successful extrusion operations. In its revised and expanded form, it also incorporates the many new developments in extrusion theory and machinery over the last years. Contents · Different Types of Extruders · Extruder Hardware · Instrumentation and Control · Fundamental Principles · Important Polymer Properties · Functional Process Analysis · Extruder Screw Design · Die Design · Twin Screw Extruders · Troubleshooting Extruders · Modeling and Simulation of the Extrusion Process

Extrusion
Author : Harold F. Giles Jr,Eldridge M. Mount III,John R. Wagner, Jr.
Publisher : William Andrew
Release Date : 2004-12-31
ISBN 10 : 0815517114
Pages : 560 pages
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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.