Laser Welding Of Plastics
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Laser Welding Of Plastics
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Author : Rolf Klein
language : en
Publisher: John Wiley & Sons
Release Date : 2012-09-19
Laser Welding Of Plastics written by Rolf Klein and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-09-19 with Technology & Engineering categories.
This is the first detailed description in English of radiation and polymeric material interaction and the influences of thermal and optical material properties. As such, it provides comprehensive information on material and process characteristics as well as applications regarding plastic laser welding. The first part of this practical book introduces the structure and physical properties of plastics, before discussing the interaction of material and radiation in the NIR and IR spectral range. This is followed by an overview of the physical foundations of laser radiation and laser sources used for plastic welding. The third part describes the main processes of laser welding thermoplastics, as well as possibilities of process control, design of joint geometry, material compatibilities and adaptation of absorption of plastics to NIR radiation. Finally, the author explains applications of laser welding plastics using several industrial case studies from the automotive industry, household goods, and medical devices. Tailored to the needs of everyone dealing with laser welding of plastics, especially engineers in packaging, component manufacturing, and the medical industry.
Laser Welding Of Plastics
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Author : Rolf Klein
language : en
Publisher: Wiley-VCH
Release Date : 2011-10-18
Laser Welding Of Plastics written by Rolf Klein and has been published by Wiley-VCH this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-10-18 with Technology & Engineering categories.
This is the first detailed description in English of radiation and polymeric material interaction and the influences of thermal and optical material properties. As such, it provides comprehensive information on material and process characteristics as well as applications regarding plastic laser welding. The first part of this practical book introduces the structure and physical properties of plastics, before discussing the interaction of material and radiation in the NIR and IR spectral range. This is followed by an overview of the physical foundations of laser radiation and laser sources used for plastic welding. The third part describes the main processes of laser welding thermoplastics, as well as possibilities of process control, design of joint geometry, material compatibilities and adaptation of absorption of plastics to NIR radiation. Finally, the author explains applications of laser welding plastics using several industrial case studies from the automotive industry, household goods, and medical devices. Tailored to the needs of everyone dealing with laser welding of plastics, especially engineers in packaging, component manufacturing, and the medical industry.
Modeling Of Molecular Healing For Micro Laser Welding Of Plastics With Diffractive Optical Elements As Spatial Modulators
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Author : David A. Grewell
language : en
Publisher:
Release Date : 2005
Modeling Of Molecular Healing For Micro Laser Welding Of Plastics With Diffractive Optical Elements As Spatial Modulators written by David A. Grewell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Diffraction categories.
Abstract: This work demonstrated, developed and characterized a new and novel technique for plastics welding using diffractive optics. Using diffractive elements laser beams were reshaped into various geometries that could be used for simultaneous welding of plastic in through transmission infrared welding. This novel technique also included the use of standard optics for resizing diffractive images for microwelding of complex geometries. In addition, new molecular healing models that accurately predict weld size and quality (degree of healing) were developed. The ability to quickly and economically form microwelds is critical to the development and commercialization of polymer-based MEMS and micro-fluidic devices. Thermoplastics offer significant advantages in the fields of biomedical engineering, communications, and in particular applications related to Micro Electro Mechanical Systems (MEMS). For example, the low manufacturing costs of polymers may allow industry to fabricate disposable MEMS. Rapid, consistent, and inexpensive assembly or packaging is critical to the commercialization of polymer-based MEMS. One method of joining that offers great promise of success for MEMS devices is Through Transmission Infrared (TTIr) welding. In the following studies, diffractive optics were used to reshape a laser beam into complex shapes for TTIr welding of plastics. These complex image shapes were then resized to micron-scale for micro-welding of plastics. In this portion of the study, the major findings included but are not limited to the following: 1. The diffractive optical elements could withstand as much as 80W of laser power 2. The efficiencies of the diffractive optics was greater than 55% 3. Micro-weld features as small as 300 microns with weld lines as thin as 75 microns could be produced 4. Cycle times as short as 50 ms are possible with TTIr welding with beam shaping diffractive optics 5. It is possible to produce hermetic welds that can sustain 0.7 MPa of burst pressure, which based on the weld geometry (average weld stress of 16 MPa). Another task of this work was to gain a better understanding of molecular healing so that micro-welds could be better understood. Because minimum weld size is affected by competing driving forces, namely thermal conductivity and molecular diffusion, these forces were studied. For example, as time increases heat conduction results in an increase in weld size, thus minimum heating time is desired to produce small welds. In contrast, molecular healing is also proportional to time, thus increasing the heating time increases weld strength. In addition, these two mechanisms are limited by maximum allowable temperatures, where the base material can degrade or ablate. Thus, increasing the temperatures (power) is also limited. In this study, it was found that the activation energy for molecular diffusion is temperature dependent. In addition, it was found that by considering the temperature cycle of a weld cycle, better models for predicting the degree of healing can be produced compared to traditional models that rely on a single peak temperature.
Handbook Of Plastics Joining
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Author : Michael J. Troughton
language : en
Publisher: William Andrew
Release Date : 2008-10-17
Handbook Of Plastics Joining written by Michael J. Troughton and has been published by William Andrew this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-10-17 with Technology & Engineering categories.
The new edition of this bestselling reference provides fully updated and detailed descriptions of plastics joining processes, plus an extensive compilation of data on joining specific materials. The volume is divided into two main parts: processes and materials. The processing section has 18 chapters, each explaining a different joining technique. The materials section has joining information for 25 generic polymer families. Both sections contain data organized according to the joining methods used for that material. A significant and extensive update from experts at The Welding Institute A systematic approach to discussing each joining method including: process, advantages and disadvantages, applications, materials, equipment, joint design, and welding parameters Includes international suppliers’ directory and glossary of key joining terms Includes new techniques such as flash free welding and friction stir welding Covers thermoplastics, thermosets, elastomers, and rubbers.
Joining Of Plastics
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Author : Jordan Rotheiser
language : en
Publisher: Carl Hanser Verlag GmbH Co KG
Release Date : 2015-05-07
Joining Of Plastics written by Jordan Rotheiser and has been published by Carl Hanser Verlag GmbH Co KG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-05-07 with Technology & Engineering categories.
The third edition of this comprehensive handbook emphasizes the relationship between the assembly methods, the materials, and the plastics manufacturing processes, thus enabling the reader to identify the best design/assembly method for a given application. The book has been completely updated and a new chapter on laser welding of plastics was added. All principal fastening and joining methods used to assemble plastic parts today are described with their particular advantages and disadvantages. Assembly method limitations for a given material and/or a given molding process are discussed in great detail. This is very much a "how-to" book, offering a wealth of hard-to-find detailed information. Contents: - Rapid Guidelines for Assembly of Plastics and Efficient Use of the Handbook - Designing for Efficient Assembly - Cost Reduction in Assembly - Design for Disassembly and Recycling - Assembly Method Selection by Material - Assembly Method Selection by Process - Adhesive and Solvent Joining - Fasteners and Inserts - Hinges - Hot Plates/Hot Die/Fusion and Hot Wire/Resistance Welding - Hot Gas Welding - Induction/Electromagnetic Welding - Insert and Multi-Part Welding - Press Fits/Force Fits/Interference Fits/Shrink Fits - Snap Fits - Spin Welding - Staking/Swaging/Peening/Cold Heading/Cold Forming - Threads: Tapped and Molded-In - Ultrasonic Welding - Vibration Welding - Laser Welding
Handbook Of Laser Welding Technologies
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Author : S Katayama
language : en
Publisher: Elsevier
Release Date : 2013-06-30
Handbook Of Laser Welding Technologies written by S Katayama and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-30 with Technology & Engineering categories.
Laser welding is a rapidly developing and versatile technology which has found increasing applications in industry and manufacturing. It allows the precision welding of small and hard-to-reach areas, and is particularly suitable for operation under computer or robotic control. The Handbook of laser welding technologies reviews the latest developments in the field and how they can be used across a variety of applications. Part one provides an introduction to the fundamentals of laser welding before moving on to explore developments in established technologies including CO2 laser welding, disk laser welding and laser micro welding technology. Part two highlights laser welding technologies for various materials including aluminium and titanium alloys, plastics and glass. Part three focuses on developments in emerging laser welding technologies with chapters on the applications of robotics in laser welding and developments in the modelling and simulation of laser and hybrid laser welding. Finally, part four explores the applications of laser welding in the automotive, railway and shipbuilding industries. The Handbook of laser welding technologies is a technical resource for researchers and engineers using laser welding technologies, professionals requiring an understanding of laser welding techniques and academics interested in the field. Provides an introduction to the fundamentals of laser welding including characteristics, welding defects and evolution of laser welding Discusses developments in a number of techniques including disk, conduction and laser micro welding Focusses on technologies for particular materials such as light metal alloys, plastics and glass
Confluence Of Multidisciplinary Sciences For Polymer Joining
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Author : S. Arungalai Vendan
language : en
Publisher: Springer
Release Date : 2018-12-17
Confluence Of Multidisciplinary Sciences For Polymer Joining written by S. Arungalai Vendan and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-12-17 with Technology & Engineering categories.
This book offers a systematic overview of polymer joining and highlights the experimental and numerical work currently being pursued to devise possible strategies to overcome the technical issues. It also covers the fundamentals of polymers, the corresponding joining processes and related technologies. A chapter on the extrapolation of finite element analysis (FEA) for forecasting the deformation and temperature distribution during polymer joining is also included. Given its breadth of coverage, the book will be of great interest to researchers, engineers and practitioners whose work involves polymers.
Joining Plastics 2006
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Author :
language : en
Publisher: iSmithers Rapra Publishing
Release Date : 2006
Joining Plastics 2006 written by and has been published by iSmithers Rapra Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Technology & Engineering categories.
Manufacturing with plastics often involves a bonding step from packaging, electronic and medical devices to large scale automotive, aerospace and construction projects. This is a continually developing field and experts at this Second International Conference on Joining Plastics debated the best methods and options for different applications. Sponsored by The National Physical Laboratory, TWI Limited and Faraday Plastics this conference was an excellent opportunity for plastics manufacturers, design engineers and product developers to talk to experts in the field and discuss the latest developments in Joining Plastics.
Fixing And Fastening Joining Of Plastics 99
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Author : Rapra Technology
language : en
Publisher: iSmithers Rapra Publishing
Release Date : 1999
Fixing And Fastening Joining Of Plastics 99 written by Rapra Technology and has been published by iSmithers Rapra Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
Handbook Of Plastics Joining
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Author : PDL Staff
language : en
Publisher: Cambridge University Press
Release Date : 2008-10-23
Handbook Of Plastics Joining written by PDL Staff and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-10-23 with Technology & Engineering categories.
A hands-on guide to choosing and using old and new technologies for joining plastics and elastomers. Includes detailed discussions of over 25 techniques used to join plastics to themselves and to other materials. Advantages and disadvantages of each technique along with detailed discussions of applications are presented. A second section is organized by material and provides details of using different processes with over 50 generic families of plastics and how different techniques and operating parameters affect weld strength and other criteria. This book is an excellent reference and an invaluable resource for novice and expert alike in determining the best joining technique for their application and providing guidance in how to design and prepare for production.