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Titlebook: Extruder Principles and Operation; M. J. Stevens,J. A. Covas Book 1995Latest edition Springer Science+Business Media Dordrecht 1995 Extrud

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发表于 2025-3-21 18:53:44 | 显示全部楼层 |阅读模式
书目名称Extruder Principles and Operation
编辑M. J. Stevens,J. A. Covas
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图书封面Titlebook: Extruder Principles and Operation;  M. J. Stevens,J. A. Covas Book 1995Latest edition Springer Science+Business Media Dordrecht 1995 Extrud
描述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 qu
出版日期Book 1995Latest edition
关键词Extruder; Extrusion; Thermoplast; mechanism; polymer; polymers
版次2
doihttps://doi.org/10.1007/978-94-011-0557-6
isbn_softcover978-94-010-4247-5
isbn_ebook978-94-011-0557-6
copyrightSpringer Science+Business Media Dordrecht 1995
The information of publication is updating

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发表于 2025-3-22 00:12:26 | 显示全部楼层
Practical extrusion processes and their requirements,ications differ, at least in degree, so that when the implications of the general theory in Chapters 5–10 are applied to practice in Chapter 11, it is clear why different materials, processes and products may require different operational and control strategies. These requirements must necessarily b
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Thermal and energy properties in processing,sefully be used. In the melt state, expansion is also approximately linear with temperature, but usually at a higher rate than in the solid. Semi-crystalline polymers including polyolefines, nylons, polyoxymethylene (POM) and polyethylene terephthalate (PETP) also show a fairly sudden increase in sp
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Principles of melt flow in single-screw extruders,crew types. The flow patterns within the screw and pressure profiles along it are discussed, together with an examination of leakage flow. Graphical presentations are used to analyse the output/pressure characteristics of the screw/die combination, for simple and some more complex situations, includ
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Operation of single-screw extruders,ance. Even in steady-state operation, these interact with each other and with pressure and temperature gradients to produce a complex pattern of simultaneous velocity, shear and temperature variations. Any attempt at a total representation of these in mathematical terms would lead either to a very g
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Twin-screw extruders,e also in suitable applications and method of operation. Further comparison must await a more detailed study of the principles of the twin-screw extruder and the many variations possible within the basic type. The author is indebted to Martelli (1983) for his excellent analysis of the mechanisms of
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