Polymer Extrusion

Author: Chris Rauwendaal

Publisher: Carl Hanser Verlag GmbH Co KG

ISBN: 1569905398

Category: Technology & Engineering

Page: 950

View: 4790

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 Extrusion

Author: Pierre G. Lafleur,Bruno Vergnes

Publisher: John Wiley & Sons

ISBN: 1118827171

Category: Technology & Engineering

Page: 352

View: 5928

Extrusion is by far the most important and the oldest processingand shaping method for thermoplastic polymers. This processconcerns almost all synthetic polymers, as well as elastomers orfood materials. Single-screw extrusion is mainly usednowadays to manufacture finished goods or semi-finished products.More than 90 million tons of thermoplastics are therefore processedevery year. Twin-screw extrusion may be divided into two systems:contra-rotating systems used within the context of PVC extrusion,for the manufacture of pipes or profiles; and co-rotating systemsexperiencing nowadays a very significant development, because oftheir significant adaptability and flexibility, which enables themanufacture of specific materials (polymer alloys, thermoplasticelastomers, filled polymers, nanocomposites). Extrusion is carriedout by passing molten polymer through a tool called die that willgive the product its final shape (films and sheets, rolledproducts, and electric cables). Thanks to the design of dies, weobtain at the output a product with controlled dimensions, uniformspeeds and homogeneous temperatures. The book will discuss the sameproduction types, but only in the case of coextrusion flows, i.e.multilayer stratified products. First of all, we will presentin this book the physics of the mechanisms at stake, then proposemore or less complex models in order to describe these mechanismsand then go forward in the interpretation of results and thecontrol of condition flows.

Plastics Extrusion Technology Handbook

Author: Sidney Levy,James F. Carley

Publisher: Industrial Press Inc.

ISBN: 9780831111854

Category: Technology & Engineering

Page: 388

View: 2592

Offering complete and in-depth data and information on plastics extrusion, this practical handbook presents the technology of the subject rather than the theory.

The Complete Technology Book on Plastic Extrusion, Moulding And Mould Designs

Author: NIIR Board of Consultants and Engineers


ISBN: 8178330083


Page: 496

View: 5895

Plastics extrusion is a high volume manufacturing process in which raw plastic material is melted and formed into a continuous profile. Extrusion produces items such as pipe/tubing, weather stripping, fence, deck railing, window frames, adhesive tape and wire insulation. There are fundamentally two different methods of extruding film, namely, below extrusion and slit die extrusion. The design and operation of the extruder up to the die is the same for both methods. The moulding process is one of the most important plastic processing operations. It is an important commercial process whereby a resinous polymeric compound is converted into useful finished articles. The origin of this process is dates back about a century to the invention of a plunger type machine. The mould has its own importance, which give the required shapes of the products. The vast growth of injection moulding is reflected dramatically in many types and sizes of equipment available today. Plastic moulding especially thermoplastic items may be produced by compression moulding methods, but since they are soft at the temperature involved, it is necessary to cool down the mould before they may be ejected. Injection moulding differs from compression moulding is that the plastic material is rendered fluid in a separate chamber or barrel, outside the mould is then forced into the mould cavity by external pressure. Plastic technology is one of the most vigorous manufacturing branches, characterised by new raw materials, changing requirements, and continuous development in processing methods. The injection moulding machines manufacturers plays an important part in the creation of injection moulding technology, process control, to essential mechanical engineering. Even though design is a specialized phase in engineering field, in tool and mould engineering it is totally divided into two wings as product design and tool and die design. This book basically deals with transport phenomena in polymer films, reinforcements for thermosets, miscellaneous thermoset processes, injection molding, blow molding, extrusion, basic principles of injection moulding, correct injection speed is necessary for filling the mould, plastic melt should not suffer degradation, the mould must be controlled for better quality product, logical consideration of moulding profile and material is important than standard setting guide lines, economical setting of the machine, proper maintenance of machine;, safety operations., preliminary checking for moulding, material, component, mould, machine, injection moulding technique, the various type of injection moulding machines, specifications, platen mounting of moulds, locating spigots, mould clamping, etc. The book covers manufacturing processes of extruded and moulded products with the various mould designs. This is very useful book for new entrepreneurs, technocrats, researchers, libraries etc.

Characterization and Failure Analysis of Plastics

Author: ASM International,Steve Lampman

Publisher: ASM International

ISBN: 1615030735

Category: Plastics

Page: 489

View: 2596

The selection and application of engineered materials is an integrated process that requires an understanding of the interaction between materials properties, manufacturing characteristics, design considerations, and the total life cycle of the product. This reference book on engineering plastics provides practical and comprehensive coverage on how the performance of plastics is characterized during design, property testing, and failure analysis. The fundamental structure and properties of plastics are reviewed for general reference, and detailed articles describe the important design factors, properties, and failure mechanisms of plastics. The effects of composition, processing, and structure are detailed in articles on the physical, chemical, thermal, and mechanical properties. Other articles cover failure mechanisms such as: crazing and fracture; impact loading; fatigue failure; wear failures, moisture related failure; organic chemical related failure; photolytic degradation; and microbial degradation. Characterization of plastics in failure analysis is described with additional articles on analysis of structure, surface analysis, and fractography.

Der gleichläufige Doppelschneckenextruder

Grundlagen, Technologie, Anwendungen

Author: Klemens Kohlgrüber

Publisher: Carl Hanser Verlag GmbH Co KG

ISBN: 3446452354

Category: Technology & Engineering

Page: 842

View: 2793

Alles zum gleichläufigen Doppelschneckenextruder Bei der Herstellung von Kunststoffen, insbesondere bei der Aufbereitung und Verarbeitung bis zum Fertigprodukt werden Extruder eingesetzt, wobei der gleichläufige Doppelschneckenextruder eine dominante Rolle spielt. Aber auch in anderen Industriezweigen, z. B. der Kautschuk- und Lebensmittelindustrie und zunehmend in der Pharmaindustrie kommen die Gleichdrallschnecken vielfältig zum Einsatz. Eine multifunktionale Maschine Das Fachbuch gibt umfassenden Einblick in die verfahrens- und maschinentechnischen Grundlagen und legt großen Fokus auf Praxisbeispiele. Meist sind die Schnecken modular aufgebaut und können damit sehr flexibel an veränderte Aufgabenstellung und Produkteigenschaften angepasst werden. Für die optimale Auslegung eines Doppelschneckenextruders sind vertiefte Kenntnisse über die Maschine und den Prozess erforderlich. Ein Praxisbuch für Einsteiger und Profis Die zweite Auflage entstand unter Mitwirkung vieler Fachautoren von renommierten Firmen und Hochschulen. Alle inzwischen erfolgten Weiterentwicklungen wurden berücksichtigt. Die zweite Auflage wurde durchgehend neu bearbeitet, ist deutlich erweitert, komplett in Farbe und in neuem Layout. Mit Zusatzmaterial auf der Website des Herausgebers: Videos, Bilder, Beispiel-Aufgaben, Rechentools EXTRA: E-Book inside

Polymer Mixing and Extrusion Technology

Author: NicholasP. Cheremisinoff

Publisher: Routledge

ISBN: 1351423495

Category: Technology & Engineering

Page: 456

View: 8350

Addressing the two major unit operations-mixing and extrusion-fundamental toprocessing elastomers and plastic materials, this reference summarizes design equationsthat can be employed effectively in scaling up product performance parameters, andcontains a thorough survey of rheological principles. In addition, the book provides awealth of practical information, relating molecular and compositional properties ofpolymers to processing characteristics and end-use properties so that engineers can selectpolymers suitable for specific equipment as well as products.Polymer Mixing and Extrusion Technology examines viscometric techniquesand demonstrates their importance to product quality assurance ... reviews design-relatedliterature/correlations and calculation procedures for mixing and extrusion ... definesneeds and precision standards for setting up a polymer processing laboratory so thatproduct quality control can be implemented in physical testing and processing research.. . plus more.Illustrated with over 200 diagrams, tables, and photographs that facilitate readers'understanding of the processes, Polymer Mixing and Extrusion Technology isan authoritative source for plastics, polymer, and chemical engineers, manufacturers ofplastics processing equipment, and advanced undergraduate and graduate students in thesedisciplines.

Mathematical Modelling for Polymer Processing

Polymerization, Crystallization, Manufacturing

Author: Vincenzo Capasso

Publisher: Springer Science & Business Media

ISBN: 9783540434122

Category: Mathematics

Page: 320

View: 8952

A large amount of relevant mathematical problems arise from the polymer industry with respect to the quality of manufactured polymer parts. This book provides the first unified presentation of the mathematical modeling of polymerization, crystallization and extrusion of polymer melts, by means of advanced methods, presented in an accessible way for applied scientists and engineers.

Thermal Degradation of Polymeric Materials

Author: Krzysztof Pielichowski,James Njuguna

Publisher: iSmithers Rapra Publishing

ISBN: 9781859574980

Category: Science

Page: 306

View: 7143

Understanding the thermal degradation of polymers is of paramount importance for developing a rational technology of polymer processing and higher-temperature applications. Controlling degradation requires understanding of many different phenomena, including chemical mechanisms, the influence of polymer morphology, the complexities of oxidation chemistry, and the effects of stabilisers, fillers and other additives. This book offers a wealth of information for polymer researchers and processors requiring an understanding of the implications of thermal degradation on material and product performance.

Polymer Processing and Structure Development

Author: Arthur N. Wilkinson,A.J. Ryan

Publisher: Springer Science & Business Media

ISBN: 9780751403633

Category: Science

Page: 577

View: 6951

Polymer science is fundamentally interdisciplinary, yet specialists in one aspect, such as chemistry or processing, frequently encounter difficulties in understanding the effects of other disciplines on their own. This book describes clearly how polymer chemistry and polymer processing interact to affect polymer properties. As such, specialists in both disciplines can gain a deeper understanding of how these subjects underpin each other. Coverage includes step-by-step introductions to polymer processing technologies; details of fluid flow and heat transfer behaviour; shaping methods and physical processes during cooking and curing, and analyses of moulding and extrusion processes.

Applications of Multi-objective Evolutionary Algorithms

Author: Carlos A. Coello Coello,Gary B. Lamont

Publisher: World Scientific

ISBN: 9812561064

Category: Computers

Page: 761

View: 9423

- Detailed MOEA applications discussed by international experts - State-of-the-art practical insights in tackling statistical optimization with MOEAs - A unique monograph covering a wide spectrum of real-world applications - Step-by-step discussion of MOEA applications in a variety of domains

Extrusion of Polymers

Theory and Practice

Author: Chan I. Chung

Publisher: Hanser Pub Incorporated

ISBN: 9781569904596

Category: Technology & Engineering

Page: 483

View: 4904

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. The second edition includes new chapters on die design, elastic effects in melt flow, and a new type of single-screw extruders with channeled barrel as well as improvements and corrections of the first edition.

Polymeric Foams

Science and Technology

Author: Shau-Tarng Lee,Chul B. Park,N. S. Ramesh

Publisher: CRC Press

ISBN: 9781420004625

Category: Technology & Engineering

Page: 220

View: 9085

Polymers are among the major hallmarks of 20th-century science, and the explosive outgrowth and tremendous importance of polymeric foams is a testament to their amazing versatility and unique properties. With applications from automotive to acoustic and medical, polymeric foams pervade all areas of our lives. If this growth is to continue into the new millennium, especially in light of stringent environmental regulations, a strong understanding of the basic science and the major technologies behind foam production is critical. Written by experienced and accomplished leaders in the field, Polymeric Foams: Science and Technology provides comprehensive coverage of the fundamentals, technologies, applications, and recent developments. The authors first outline the basic principles and fundamental foaming mechanisms, covering thermodynamics, kinetics, and the basics of blowing agents and foam formation. Foaming technologies and product applications then become the focus, with explanations of structure-property relationships, processing methods, and general types of foams. The book concludes with chapters on recent developments in composite and biodegradable foams that illustrate how to tailor processing to meet application needs. Illuminating the role of polymeric foams in the modern materials landscape, Polymeric Foams: Science and Technology is the perfect guide for developing innovative materials that achieve better performance and regulatory compliance.