Effect of process conditions on the dart impact properties of thin-wall injection-molded polycarbonate plates
| Autor: | Jeong Moo Lee, Shi Ho Lee, Jong Sin Moon, Byoung Ho Choi |
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| Rok vydání: | 2012 |
| Předmět: |
Dart
Materials science Polymers and Plastics Drop (liquid) Process (computing) General Chemistry Molding (process) Surfaces Coatings and Films Process conditions Volumetric flow rate Thin wall visual_art Materials Chemistry visual_art.visual_art_medium Composite material Polycarbonate human activities computer computer.programming_language |
| Zdroj: | Journal of Applied Polymer Science. 127:1466-1474 |
| ISSN: | 0021-8995 |
| DOI: | 10.1002/app.37549 |
| Popis: | Multifunctional mobile products, such as cellular phones, laptop computers, personal media players, etc., have become smaller and lighter; so the technology of thin-wall injection molding (TWIM) has been highlighted for making lightweight and compact mobile electronic products. Regarding mechanical properties, many portable electronic products should pass the so-called “drop test”; therefore, the evaluation of the dart (or impact) property of the housing that is made by the TWIM process is crucial for commercializing a product. However, extant research on the effect of injection molding process parameters on the physical properties of TWIM plates is insufficient as yet. Therefore, in this study, the pressure and temperature inside the cavity during the injection molding process are monitored by varying the injection molding process parameters, i.e., the gate size, injection speed, and melt temperature, and the effect of the average flow rate of the molten resin inside the cavity on the dart property of thin-wall injection-molded plates is examined. The dart property of thin-wall injection-molded plates is evaluated by the instrumented dart impact test to differentiate various responses of the load-displacement data during dart tests. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci., 2013 |
| Databáze: | OpenAIRE |
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