Download or read book Novel Mold Modifications for Injection Molding of Specialty Products written by Demitri Shotwell and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two methods of mold modification for injection molding specialty plastic parts wereexplored in three projects: First, The effect of an in-mold static mixer on orientation of fiber-reinforced polypropylene (PP) was explored within the injection molding process. Several mold geometries and helical mixer designs were assessed via simulation to identify the mixing ability and the potential effect on fiber orientation. It was found that the static mixers within the runner segment could successfully mix the polymer and randomize the fibers but that the fiber alignment reduction was quickly recovered. Injection molding experiments were carried out to verify these simulations using one geometry case. Fiber orientation at different mold locations were measured using micro-CT (μCT) scans and the degree of fiber orientation was quantified by "goodness of fit" to a normal Gaussian function approach. The experimental fiber orientation results showed good agreement with the simulations. These experiments indicated that the use of a static mixer within the runner system of a mold could be used for mixing the polymer melt after the plasticizing unit of the injection molding machine. However, its effect on changing the overall alignment of the fibers within injection molded parts could be offset by the melt flow downstream of the static mixer, suggesting the importance of mixer location with respect to the part cavity. In a related project, the effect of an in-mold static mixer on optical properties of polystyrene (PS) parts was explored within the injection molding process. Several helical mixer designs were assessed via simulation and molding trials to identify the mixing ability and the potential effect on optical properties including retardation and birefringence. It was found that the static mixers within the runner segment could successfully mix the polymer and disrupt property distributions such as temperature but that there was only slight improvement in retardation with some of the mixer cases. The experiments and simulations showed relatively good correlation in results although there were slight differences in the trends that could be due to the experimental retardation measurement resolution or unaccounted-for variables between the experiments and simulations. The retardation was experimentally measured using a custom-made polariscope using photography and image processing. These experiments indicated that the use of a static mixer within the runner system of a mold could be used for homogenizing the polymer melt after the plasticizing unit of the injection molding machine. However, its effect on improving the optical performance of injection molded parts could be offset by the melt flow downstream of the static mixer and potential increase of residual stresses due to flow restriction, suggesting the importance of mixer location and geometry. Last, the use of a sacrificial reservoir as part of an injection mold with optical polycarbonate (PC) materials was explored with simulations. Three different methods of reservoir designs were considered. The first method was using engineering intuition to determine the geometry, the second method used a combination of mass and momentum balance equations to determine the geometry, the third method used the mass balance equation to determine the geometry. Using these three methods eight reservoirs were designed and simulated and compared to two noreservoir cases. 27 runs varying three levels of injection flow rate, V/P switch, and packing pressure were simulated for each of the 10 geometry cases. Considering the quality parameters of flow and thermally induced retardation and the average and standard deviation of volumetric shrinkage the benefit of using a reservoir for manufacturing lens parts was considered. For each of the quality parameters the minimum, best, case occurred with one of the reservoirs. Thus, this study offers a proof of concept that reservoirs could offer a method to improve both the retardation and warpage defects in injection molded optical parts.
Download or read book Injection Molding Handbook written by D.V. Rosato and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1484 pages. Available in PDF, EPUB and Kindle. Book excerpt: This third edition has been written to thoroughly update the coverage of injection molding in the World of Plastics. There have been changes, including extensive additions, to over 50% of the content of the second edition. Many examples are provided of processing different plastics and relating the results to critiCal factors, which range from product design to meeting performance requirements to reducing costs to zero-defect targets. Changes have not been made that concern what is basic to injection molding. However, more basic information has been added concerning present and future developments, resulting in the book being more useful for a long time to come. Detailed explanations and interpretation of individual subjects (more than 1500) are provided, using a total of 914 figures and 209 tables. Throughout the book there is extensive information on problems and solutions as well as extensive cross referencing on its many different subjects. This book represents the ENCYCLOPEDIA on IM, as is evident from its extensive and detailed text that follows from its lengthy Table of CONTENTS and INDEX with over 5200 entries. The worldwide industry encompasses many hundreds of useful plastic-related computer programs. This book lists these programs (ranging from operational training to product design to molding to marketing) and explains them briefly, but no program or series of programs can provide the details obtained and the extent of information contained in this single sourcebook.
Download or read book Mold Engineering written by Herbert Rees and published by Hanser Gardner Publications. This book was released on 1995-01-01 with total page 621 pages. Available in PDF, EPUB and Kindle. Book excerpt: Injection molds for thermoplastic molding materials and their performance are covered in detail in this book for mold designers, molding machine technicians, and design engineers. Stepped guidelines are supplied for the design of molds, from product drawing to complete mold assembly drawing, and more.
Download or read book Injection Mold Design Handbook written by Bruce Catoen and published by . This book was released on 2021-10-15 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt: An injection mold is the heart of any plastics molding workcell. Understanding the principles of an injection mold design and its importance is fundamental to the success of the product. This book takes the reader through the process of conceptualizing and designing an injection mold that will produce the desired plastic part.
Download or read book How to Make Injection Molds written by Georg Menges and published by Carl Hanser Verlag GmbH Co KG. This book was released on 2013-03-18 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: Economic success in the plastics processing industry depends on the quality, precision, and reliability of its most common tool: the injection mold. Consequently, misjudgments in design and mistakes in the manufacturing of molds can result in grave consequences. This comprehensive handbook for the design and manufacture of injection molds covers all aspects of how to successfully make injection molds from a practical as well as from a theoretical point of view. It should serve as an indispensable reference work for everyone engaged in mold making. "...an example of how books should be written ... will be used by molders, mold designers and mold makers and will become a standard." (Polymer News) Contents: · Materials for Injection Molds · Mold Making Techniques · Estimating Mold Costs · The Injection Molding Process · Design of Runner Systems · Design of Gates · Venting of Molds · Heat Exchange System · Shrinkage · Mechanical Design · Shifting of Cores · Ejection · Alignment and Changing of Molds · Computer-Aided Mold Design and Construction · Maintenance of Injection Molds · Measuring in Injection Molds · Temperature Controllers · Mold Standards · Correction of Molding Defects · Special Processes - Special Molds
Download or read book Injection Molding written by Gerd Pötsch and published by . This book was released on 1995-01-01 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: This introduction covers all aspects such as materials behavior, machine and mold design, and the process.
Download or read book Injection Molds written by Hans Gastrow and published by Hanser Gardner Publications. This book was released on 2002 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Injection Moulding Of Plastics written by and published by Engineers India Research In. This book was released on 2008* with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book 'Injection Moulding of Plastics' covers various methods including Injection Moulding, Setting-up Mould and Machine,Effect of Processing on Mechanical Properties, Mouldflow, Computer Controlled Automatic Injection Moulding Machine, Maintenance of Injection Moulding Machine, CAE and CAD Technology in Moulds Making, Injection Moulding Process, Specialised Injection Moulding Process, Troubleshooting in Injection Moulding, Injection Moulding of Thermosets, Injection Moulding Machine Design for Injection Moulds, Designing Moulds for Thermoset Processing, Injection Moulded Plastic Components, Plastic Moulded Toys, Plastic Injection Moulding Products, Plastic Injection Moulding Items (like Bucket, Plastic Chairs, Bathing Tub). The book has been written for the benefit and to prove an asset and a handy reference guide in the hands of new entrepreneurs and well established ind ustrialists
Download or read book Injection Molding written by Rong Zheng and published by Springer Science & Business Media. This book was released on 2011-06-21 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers fundamental principles and numerical methods relevant to the modeling of the injection molding process. As injection molding processing is related to rheology, mechanical and chemical engineering, polymer science and computational methods, and is a rapidly growing field, the book provides a multidisciplinary and comprehensive introduction to the subjects required for an understanding of the complex process. It addresses the up-to-date status of fundamental understanding and simulation technologies, without losing sight of still useful classical approaches. The main chapters of the book are devoted to the currently active fields of flow-induced crystallization and orientation evolution of fiber suspensions, respectively, followed by detailed discussion of their effects on mechanical property, shrinkage and warpage of injection-molded products. The level of the proposed book will be suitable for interested scientists, R&D engineers, application engineers, and graduate students in engineering.
Download or read book Injection Molds and Molding written by J.B. Dym and published by Springer Science & Business Media. This book was released on 1987-04-30 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Successful Injection Molding written by John P. Beaumont and published by Hanser Gardner Publications. This book was released on 2002 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book simultaneously addresses the subjects of successful molded product development and the practical application of injection molding simulation in this process. A strong emphasis is placed on establishing a clear understanding of the complex interaction between materials, process, mold design and part design, and how injection simulation can be used to evaluate this interaction.
Download or read book Moldflow Design Guide written by Jay Shoemaker and published by Hanser Publications. This book was released on 2006 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: The origins of this book not only include Moldflow Design Principles, but also includes Warpage Design Principles published by Moldflow, and C-Mold Design Guide. Collectively, these documents are based on years of experience in the research, theory and practice of injection molding. These documents are now combined into one book, the Moldflow Design Principles. This book is intended to help practicing engineers solve problems they encounter frequently in the design of parts and molds, as will as during production. This book can also be used as a reference for training purpose at industrial, as well as educational institutions.
Download or read book Injection Molds 108 Proven Designs written by Hans Gastrow and published by Hanser Gardner Publications. This book was released on 1993-01-01 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Gastrow" belongs on the desk of everyone involved with designing or building injection molds. After a general introduction that explains the different types of molds, runners and gates, mold temperature control, types of ejectors, special designs, standard mold components, and materials for molds, the book then presents 108 illustrated examples of good mold design. These are classified as standard molds (two-plate, split cavity, stripper-plate, and three-plate), stack molds, hot-runner molds, cold-runner molds, and special design molds.
Download or read book Understanding Product Design for Injection Molding written by Herbert Rees and published by Hanser Gardner Publications. This book was released on 1996-01-01 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: This primer offers assistance when selecting the proper material for any product and determining whether injection molding is the process best suited for the application.
Download or read book Injection Molding written by Irvin I. Rubin and published by Wiley-Interscience. This book was released on 1973 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt: The essential primer on injection molding design and execution Injection molding has become ubiquitous, and the proof is in the product from parts to packaging to products, this versatile manufacturing method has become a hallmark of the plastics industry. Injection Molding: Theory and Practice is an essential primer for designers and line workers alike, providing clear, expert guidance for every step of the process. From molds and materials to hydraulics and electrical mechanisms, this book tells you everything you need to know to effectively design for and work with an injection molding machine.
Download or read book Gastrow Injection Molds written by Hans Gastrow and published by . This book was released on 2006 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mold design is one of the most challenging tasks in injection molding and it is crucial for successful profitable operations. The book compiles the experience of many seasoned designers and presents tried and tested molds that run successfully in production. For this fourth edition, changes and supplements were once again undertaken with the aim of representing the state of the art. The book is written by practitioners for practitioners, describing problem solving in the design and the manufacture of injection molds.
Download or read book Understanding Injection Molds written by Harry Pruner and published by Hanser Pub Incorporated. This book was released on 2013 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book opens up the entire subject of injection mold technology, including numerous special procedures, in an established and practical way. It is specifically intended for beginners, young professionals, business owners, as well as engineering students. The chapters are clearly structured and easy to understand. The textbook is designed so that it provides a complete basic knowledge of injection molds in chronological order as well as daily guidance and advice. The numerous colored figures allow a rapid understanding of the content, which is especially helpful to the beginner who wants to learn about injection molds quickly. In the foreground of the description are thermoplastic molds. Divergent processes for thermoset or elastomer molds are explained at the end of each chapter. The book captures the current state of the art and is written by authors from the field.
