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Analyzing and Troubleshooting Single-Screw Extruders

Analyzing and Troubleshooting Single-Screw Extruders
  • Author : Gregory A. Campbell,Mark A. Spalding
  • Publisher :Unknown
  • Release Date :2021-01-05
  • Total pages :864
  • ISBN : 1569907846
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Summary : 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

Extrusion
  • Author : Harold F. Giles Jr,John R. Wagner, Jr.,Eldridge M. Mount
  • Publisher :Unknown
  • Release Date :2013-09-21
  • Total pages :636
  • ISBN : 9781437734829
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Summary : 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

Troubleshooting the Extrusion Process

Troubleshooting the Extrusion Process
  • Author : Maria del Pilar Noriega E.,Chris Rauwendaal
  • Publisher :Unknown
  • Release Date :2019-10-07
  • Total pages :366
  • ISBN : 9781569907764
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Summary : 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 Troubleshooting Plastics Processes

Handbook of Troubleshooting Plastics Processes
  • Author : John R. Wagner, Jr.
  • Publisher :Unknown
  • Release Date :2012-09-19
  • Total pages :504
  • ISBN : 9781118511206
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Summary : This handbook provides a framework for understanding how tocharacterize plastic manufacturing processes for use introubleshooting problems. The 21 chapters are authored bywell-known and experienced engineers who have specialized knowledgeabout the processes covered in this practical guide. From the Preface: “In every chapter, the process is described and the mostcommon problems are discussed along with the root causes andpotential technical solutions. Numerous case studies are providedthat illustrate the troubleshooting process. Mark A. Spalding,The Dow Chemical Company

Handbook of Industrial Polyethylene and Technology

Handbook of Industrial Polyethylene and Technology
  • Author : Mark A. Spalding,Ananda Chatterjee
  • Publisher :Unknown
  • Release Date :2017-10-12
  • Total pages :1410
  • ISBN : 9781119159780
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Summary : 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.

International Polymer Processing

International Polymer Processing
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :2009
  • Total pages :229
  • ISBN : CORNELL:31924090501226
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Summary :

Mixing in Single Screw Extrusion

Mixing in Single Screw Extrusion
  • Author : Martin Gale
  • Publisher :Unknown
  • Release Date :2009
  • Total pages :300
  • ISBN : 1847351298
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Summary : Extrusion is used for about half of all plastics product manufacture, mostly using single screw extruders. Very often part of their role is the incorporation of one or more of a very wide range of additives, mainly in the form of masterbatches. These range from very visible colours to the invisible traces of anti-block and slip additives. There are also continuing pressures to improve overall economics and these require increased mixing performance in many cases. The situation that mixing in conventional single screw extruders can easily be sub-standard for the application is illustrated in the book's first chapter which describes a number of real examples of inadequate mixing. The book explains why these typical shortcomings occur and the application of mixing principles plus various practical approaches to eliminating such problems. With the growing pressures to increase the amount of plastics recycling, both the limitations and success in blending the mainly incompatible polymer combinations are explained. The development of 'add-on' cavity mixers and floating ring mixers, together with their methodology are described, whilst the associated innovative techniques using liquid injection of colours, tackifiers, lubricants, crosslinking agents and foaming agents, (particularly carbon dioxide) are included. Developments in controlled levels of blending by 'chaotic mixing' to produce products with very specific properties such as barrier films is briefly described. Extrusion tests for carbon black dispersion are included and the book concludes with a practical guide to the preparation of microtomed plastics specimens for evaluation by optical microscopy.

Extrusion of Polymers

Extrusion of Polymers
  • Author : Chan I. Chung
  • Publisher :Unknown
  • Release Date :2019-10-07
  • Total pages :488
  • ISBN : 9781569907382
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Summary : 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

Food Processing Operations Analysis

Food Processing Operations Analysis
  • Author : Das
  • Publisher :Unknown
  • Release Date :2005
  • Total pages :416
  • ISBN : 8186299785
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Summary : The Book Tries To Make The Reader Understand The Food Processing Operations Through A Comprehensive Numerical Problem.Understanding Of The Operations Becomes Deeper When The Reader Solves The Exersise Problems Given Under Each Of The Operations. Answer To Most Of The Numerical Problems Have Been Provided In The Book. The Proposed Book Is Unique As It Includes (I) Comprehensive Numerical Problem Based On Actual Data Taken During Food Processing Operations (Ii) Mathematical Modelling Of The Processing Operations (Iii) Solutions Of The Numerical Problem Based On Mathematical Models Developed (Iv) Exersise Problems And (V) Inclusion Of Matlab Program In The Book. The Program Will Help The Reader To Find Out The Value Of The Responces As Affected By Varying The Independent Variables To Different Levels.Most Of The Materials Havebeen Class Tested Through The Teaching Of The Subjects. E.G., Food Processing Operations, Transfer Processes In Food Materials And Food Process Modelling And Evaluation. Content Highlights : - Part-I : Mechanical Operations : Size Reduction And Practice Size Analysis# High Pressure Homoginization. # Flexible Packaging And Shelf Life Prediction# Modified Atmosphere Packaging And Storage. # Single Screw Extrusion. # Seperation Of Liquids In Disk Type Centrifugal Seperator. # Seperation And Convaying On Oscillating Tray Surface. # Solid MixingsPart-Ii : Thermal Operations : Comparing Saturated And Flue Gas As Heat Transfer Media. # Liquid Heating In Plate Heat Exchanger. # Liquid Heating In Helical Tube Heat Exchanger. # Air Heating In Extended Surface Heat Exchanger. # In-Bottle Serialization. # Fluid Bed Freezing. # Concentration In Raising Film Evaporator. # Concentration In Falling Film Multistage Mechanical Vapour Recompression Evaporator. # Concentration In Scraped Surface Evaporator. # Osmo-Concentration In Fruit Solid. # Differential And Flash Distillation. # Air-Recirculatory Tray Drying. # Vaccum Drying. # Spray Drying. # Freeze Drying. # Hot Air Puffing.Part-Iii : Experimentation And Optimization : Empirical Model Development# Sensory Evaluation Using Fuzzy Logic. # Index

Understanding Extrusion

Understanding Extrusion
  • Author : Chris Rauwendaal
  • Publisher :Unknown
  • Release Date :2018-12-10
  • Total pages :251
  • ISBN : 156990698X
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Summary : "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"--

Screw Extrusion

Screw Extrusion
  • Author : James Lindsay White
  • Publisher :Unknown
  • Release Date :2003
  • Total pages :444
  • ISBN : 3446196242
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Summary : 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

Analysis of the Flow Field in Single-screw Extruders Using Magnetic Resonance Imaging

Analysis of the Flow Field in Single-screw Extruders Using Magnetic Resonance Imaging
  • Author : Cynthia Kiyoko Agemura
  • Publisher :Unknown
  • Release Date :1993
  • Total pages :318
  • ISBN : UCAL:X53457
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Summary :

Extrusion of Metals, Polymers, and Food Products

Extrusion of Metals, Polymers, and Food Products
  • Author : Sayyad Zahid Qamar
  • Publisher :Unknown
  • Release Date :2018-02-28
  • Total pages :220
  • ISBN : 9789535138372
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Summary : 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.

Extrusion

Extrusion
  • Author : Harold F. Giles Jr,Eldridge M. Mount III,John R. Wagner, Jr.
  • Publisher :Unknown
  • Release Date :2004-12-31
  • Total pages :560
  • ISBN : 9780815517115
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Summary : 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.

Extrusion Problems Solved

Extrusion Problems Solved
  • Author : M N Riaz,G J Rokey
  • Publisher :Unknown
  • Release Date :2011-11-09
  • Total pages :184
  • ISBN : 9780857095206
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Summary : Extrusion is widely used for the preparation of a variety of foodstuffs including breakfast cereals, snack food and pasta, as well as pet food and animal and aquaculture feed. Extrusion problems solved provides responses to more than 300 frequently asked questions about the process of food extrusion and the techniques and equipment involved, in a practical question-and-answer format. The book is divided into twelve chapters for ease of reference: the opening chapters concentrate on introductory queries and on different components of an extruder system, followed by two chapters that help the reader select the correct type of extruder for a product. Chapters five and six discuss the impact of factors such as protein content and particle size on the extrusion process, while the use of pre-conditioners is discussed in chapter seven. The latter part of the book discusses specific types of extruder and die and knife assemblies, followed by a chapter on issues relating to drying extruded food products. The final chapter offers practical guidelines and rules of thumb for the most common issues relating to food and feed extrusion. Written by two leading experts in the field, Extrusion problems solved is an essential reference source and troubleshooting guide for professionals working in food, pet food and feed extrusion. It will also be a valuable training resource for students of extrusion. Offers practical guidelines and rules of thumb for the most common food and feed extrusion problems Chapters concentrate on introductory queries, types of extruder and components of extruder systems, knife assemblies, the use of pre-conditioners and issues in drying extruded food products Provides responses to more than 300 frequently asked questions about the processes, equipment and techniques of food extrusion in a practical question-and-answer format

Polymer Extrusion

Polymer Extrusion
  • Author : Chris Rauwendaal
  • Publisher :Unknown
  • Release Date :2014-01-16
  • Total pages :950
  • ISBN : 9781569905395
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Summary : 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

Polymer Processing

Polymer Processing
  • Author : Donald G. Baird,Dimitris I. Collias
  • Publisher :Unknown
  • Release Date :2014-03-24
  • Total pages :416
  • ISBN : 9780470930588
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Summary : Fundamental concepts coupled with practical, step-by-step guidance With its emphasis on core principles, this text equips readers with the skills and knowledge to design the many processes needed to safely and successfully manufacture thermoplastic parts. The first half of the text sets forth the general theory and concepts underlying polymer processing, such as the viscoelastic response of polymeric fluids and diffusion and mass transfer. Next, the text explores specific practical aspects of polymer processing, including mixing, extrusion dies, and post-die processing. By addressing a broad range of design issues and methods, the authors demonstrate how to solve most common processing problems. This Second Edition of the highly acclaimed Polymer Processing has been thoroughly updated to reflect current polymer processing issues and practices. New areas of coverage include: Micro-injection molding to produce objects weighing a fraction of a gram, such as miniature gears and biomedical devices New chapter dedicated to the recycling of thermoplastics and the processing of renewable polymers Life-cycle assessment, a systematic method for determining whether recycling is appropriate and which form of recycling is optimal Rheology of polymers containing fibers Chapters feature problem sets, enabling readers to assess and reinforce their knowledge as they progress through the text. There are also special design problems throughout the text that reflect real-world polymer processing issues. A companion website features numerical subroutines as well as guidance for using MATLAB®, IMSL®, and Excel to solve the sample problems from the text. By providing both underlying theory and practical step-by-step guidance, Polymer Processing is recommended for students in chemical, mechanical, materials, and polymer engineering.

Frontiers of Manufacturing and Design Science

Frontiers of Manufacturing and Design Science
  • Author : Ran Chen
  • Publisher :Unknown
  • Release Date :2010-12-06
  • Total pages :4432
  • ISBN : 9783038135265
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Summary : Volume is indexed by Thomson Reuters CPCI-S (WoS). This collection brings together 820 peer-reviewed papers, on Manufacturing and Design Science, aimed at promoting the development of design and manufacturing science, strengthening international academic cooperation and communications, and exchanging research ideas. It is divided into: Chapter 1 Frontiers in Manufacturing Science, Chapter 2: Frontiers in Design Science, Chapter 3: Frontiers in Mechanics and Materials, Chapter 4: Frontiers in Automation and Information.

Conference Proceedings

Conference Proceedings
  • Author : Society of Plastics Engineers. Technical Conference
  • Publisher :Unknown
  • Release Date :2002
  • Total pages :229
  • ISBN : UOM:39015047930501
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Summary :

Extruder Principles and Operation

Extruder Principles and Operation
  • Author : M.J. Stevens,J.A. Covas
  • Publisher :Unknown
  • Release Date :2012-12-06
  • Total pages :494
  • ISBN : 9789401105576
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Summary : 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.

Plastics Processing Data Handbook

Plastics Processing Data Handbook
  • Author : D.V. Rosato
  • Publisher :Unknown
  • Release Date :2012-12-06
  • Total pages :392
  • ISBN : 9789401096584
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Summary : This comprehensive book provides guidelines for maximizing plastics proc essing efficiency in the manufacture of all types of products, using all types of plastics. A practical approach is employed to present fundamental, yet comprehensive, coverage of processing concepts. The information and data presented by the many tables and figures interrelate the different variables that affect injection molding, extrusion, blow molding, thermoforming, compression molding, reinforced plastics molding, rotational molding, re action injection molding, coining, casting, and other processes. The text presents a great number of problems pertaining to different phases of processing. Solutions are provided that will meet product per formance requirements at the lowest cost. Many of the processing variables and their behaviors in the different processes are the same, as they all in volve basic conditions of temperature, time, and pressure. The book begins with information applicable to all processes, on topics such as melt soft ening flow and controls; all processes fit into an overall scheme that re quires the interaction and proper control of systems. Individual processes are reviewed to show the effects of changing different variables to meet the goal of zero defects. The content is arranged to provide a natural progres sion from simple to complex situations, which range from control of a sin gle manual machine to simulation of sophisticated computerized processes that interface with many different processing functions.