Performance Evaluation of a Software Engineering Tool for Automated Design of Cooling Systems in Injection Moulding
TL;DR: In this paper, a software tool for automating the design of cooling systems for injection molding and a validation of its performance is presented, where two different design methods (i.e. automatic and manual) were applied to the mould design of two thin-walled products, namely a rectangular flat box and a cylindrical container with a flat base.
About: This article is published in Procedia CIRP.The article was published on 2013-01-01 and is currently open access. It has received 16 citations till now. The article focuses on the topics: Injection moulding & Engineering design process.
Citations
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TL;DR: In this paper , the influence of various injection molding process parameters on the warpage deformation was explored by using mold flow analysis and gray correlation analysis, and the results indicated that the conformal cooling system improved the average temperature distribution.
Abstract: In automobiles, lock parts are matched with inserts, and this is a crucial quality standard for the dimensional accuracy of the molding. This study employed moldflow analysis to explore the influence of various injection molding process parameters on the warpage deformation. Deformation of the plastic part is caused by the nonuniform product temperature distribution in the manufacturing process. Furthermore, improper parameter design leads to substantial warpage and deformation. The Taguchi robust design method and gray correlation analysis were used to optimize the process parameters. Multiobjective quality analysis was performed for achieving a uniform temperature distribution and reducing the warpage deformation to obtain the optimal injection molding process parameters. Subsequently, three water cooling system designs—original cooling, U-shaped cooling, and conformal cooling—were tested to modify the temperature distribution and reduce the warpage. Taguchi gray correlation analysis revealed that the main influencing parameter was the mold temperature followed by the holding pressure. Moreover, the results indicated that the conformal cooling system improved the average temperature distribution.
7 citations
26 Aug 2019
TL;DR: In this paper, a simulative approach for an automatic cooling channel layout via an inverse heat conduction problem is presented, based on previous results, the methodology is adapted to three-dimensional problems.
Abstract: During the injection moulding process, local differences in pressure and temperature lead to different shrinkage over the part. This inhomogeneous shrinkage can lead to internal stresses, which are compensated by an undesirable warpage of the part. A sophisticated design of the cooling channels can avoid most of these problems. In previous research, it was shown that a locally adjusted temperature distribution on the cavity surface leads to less warpage of the part. In order to achieve this temperature distribution, an adapted cooling channel design is necessary. This design process is not possible with an analytical calculation but is the result of an iterative and numerical optimisation process. In this paper, a simulative approach for an automatic cooling channel layout via an inverse heat conduction problem is presented. Based on previous results, the methodology is adapted to three-dimensional problems. This approach brings the local heat and cooling demand of the part in equilibrium based on the postulate of a locally homogeneous material density. By this methodology, a proper cooling channel design close to the mould surface is determined. Simulations show a significant reduction of warpage by at least 22 % which will be validated by experimental results.
3 citations
Dissertation•
01 Oct 2013
Abstract: ............................................................................................. III ACKNOWLEDGEMENTS ....................................................................... V CONTENTS ...............................................................................................VI LIST OF FIGURES ............................................................................... XIV LIST OF TABLES ................................................................................. XIX LIST OF ABBREVIATIONS .............................................................. XXII LIST OF SYMBOLS ........................................................................... XXIV PUBLICATIONS ................................................................................. XXV CHAPTER 1 . INTRODUCTION TO MICRO-INJECTION MOULDING ................................................................................................ 1 1.1 General considerations of micro injection moulding .............................. 1 1.2 Conventional injection moulding steps ................................................... 2 1.2.1 The injection moulding cycle ........................................................ 3 1.3 The micro-injection moulding machine .................................................. 4 1.4 The micro powder injection moulding processing .................................. 6 1.5 The thesis structure................................................................................ 10
1 citations
1 citations
01 Jan 2016
TL;DR: In this article, an innovative way of implementing the automation of an injection molding machine using microcontroller which in turn will reduce total automation cost to only a few thousands rupees.
Abstract: This article will describe an innovative way of implementing the automation of an injection molding machine using microcontroller which in turn will reduce total automation cost to only a few thousands rupees. In the piston side, toggle mechanism is used instead of direct drive to get extra mechanical advantage and safety features. The whole design is being simplified by cutting out some features which in turn reduce the total cost of the system without affecting its effectiveness. The system can be operated in two modes. In primary mode, the operator can easily operate through on-board keypad by entering only time sequences with the help of the manual. In the second one, it can be remotely controlled though a PC based application software.
1 citations
References
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TL;DR: In this article, a detailed formulation for simulating the injection-molding filling of thin cavities of arbitrary planar geometry is presented, in terms of generalized Hele-Shaw flow for an inelastic, non-Newtonian fluid under non-isothermal conditions.
Abstract: A detailed formulation is presented for simulating the injection-molding filling of thin cavities of arbitrary planar geometry. The modelling is in terms of generalized Hele-Shaw flow for an inelastic, non-Newtonian fluid under non-isothermal conditions. A hybrid numerical scheme is employed in which the planar coordinates are described in terms of finite elements and the gapwise and time derivatives are expressed in terms of finite differences. The simulation is applied to the filling of a two-gated plate mold having an intentionally unbalanced runner system. Good agreement is obtained with experimental results in terms of short-shot sequences, weldline formation and pressure traces at prescribed points in the cavity.
474 citations
Book•
01 Mar 1987
TL;DR: Injection molds: How to make injection molds as discussed by the authors, where the injection mold is made from a pre-existing injection mold and the injection is performed by a mold-maker.
Abstract: How to make injection molds , How to make injection molds , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
255 citations
TL;DR: A model of the automated synthesis process is provided as a context to discuss research in the area and some guidelines are presented to help researchers and designers find approaches to solving their particular design problems using computational design synthesis.
Abstract: The field of computational design synthesis has been an active area of research for almost half a century. Research advances in this field have increased the sophistication and complexity of the designs that can be synthesized, and advances in the speed and power of computers have increased the efficiency with which those designs can be generated. Some of the results of this research have begun to be used in industrial practice, yet many open issues and research challenges remain. This paper provides a model of the automated synthesis process as a context to discuss research in the area. The varied works of the authors are discussed as representative of the breadth of methods and results that exist under the field of computational design synthesis. Furthermore, some guidelines are presented to help researchers and designers find approaches to solving their particular design problems using computational design synthesis. DOI: 10.1115/1.2013289
132 citations
"Performance Evaluation of a Softwar..." refers background in this paper
...Although automating design problems has been extensively investigated over the past 30 years [4], not much literature addresses the problem of automating injection moulding cooling design....
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TL;DR: This research extends the previous investigation of the automation of the preliminary design stage to the layout design stage of the cooling system design process, and develops a framework for fuzzy evaluation of the layout designs to rate the various design alternatives generated.
Abstract: This research extends our previous investigation of the automation of the preliminary design stage to the layout design stage of the cooling system design process. While the functional aspects of the cooling system are considered during the preliminary design stage, the layout design stage addresses both the functionality and manufacturability of the design. A graph structure is devised to capture a given preliminary design and a graph traversal algorithm is developed to generate candidate cooling circuits from the graph structure. Heuristic search is employed to develop the cooling circuits into the layout designs by generation of tentative manufacturing plans. A framework for fuzzy evaluation of the layout designs is developed to rate the various design alternatives generated. An experimental system is implemented to verify the feasibility of the approach, and examples generated from the system are presented to illustrate the major steps of the automatic design process.
67 citations
Book•
01 Jan 2002
TL;DR: This .NET-ready Windows programming guide shows you how to get the most out of Windows Forms-the next-generation Windows programming class library and discovers how to use C# to create dynamic user interfaces and graphical outputs for Windows applications.
Abstract: "Look it up in Petzold" remains the last word on Windows development. In this .NET-ready Windows programming guide, the best-selling author shows you how to get the most out of Windows Forms-the next-generation Windows programming class library. You'll discover how to use C# to create dynamic user interfaces and graphical outputs for Windows applications. With dozens of examples of client applications to illustrate common techniques and plenty of no-nonsense advice on best programming practices, you'll be C# sharp in no time. Topics covered in this guide include: * A tour of C# * Windows Forms * Essential structures * An exercise in text output * Lines, curves, and area fills * Tapping into the keyboard * Pages and transforms * Taming the mouse * Text and fonts * The timer and time * Images and bitmaps * Buttons, labels, and scrolls * B'ers and other splines * Menus * Paths, regions, and clipping * Dialog boxes * Brushes and pens * Edit, list, and spin controls * Font fun * Toolbars and status bars * Printing * Tree view and List view * Metafiles * Clip, drag, and drop INCLUDED ON CD-ROM: * Sample source code for all the examples presented in the book For customers who purchase an ebook version of this title, instructions for downloading the CD files can be found in the ebook.
47 citations
"Performance Evaluation of a Softwar..." refers methods in this paper
...The method and algorithms for cooling generation have been implemented using C#© [11]....
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