Mold-Flow Analysis of Warpage for Multi-Component Injection Molding
| Autor: | Tung-Sheng Hsieh, 謝東昇 |
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| Rok vydání: | 2010 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 98 Recent years, multi-color injection molding products are increasing quickly because of requirements from consumer market for product’s functionality and appearance. Consequently, the multi-component injection molding technology becomes an important research direction. One of the critical factors for deciding the quality of injection molding product is the dimensional precision requirement. Since the amount of warpage will affect the dimensional precision requirement. Therefore, this research is focus on the discussion of warpage of multi-component injection molding. The process studied in this research is to combine different plastic material by two-shot injection molding technology. One example is to combine crystallization plastic PP and elastomer TPE, and the other one is to combine amorphic substance plastic PS and the elastomer TPE. The analysis is done by using computer-aided engineering software Moldex. This study is divided into two directions. The first direction is using Taguchi method to analyze the control factors of mold designing parameters to find out the optimal parameters for the minimum amount of warpage. The result shows that the improvement can reach 91.8% for optimal combination of parameters of the first shot compared to the average amount of warpage. The optimal combination of parameters for the second shot also can improve the amount of warpage to 40% compared to the average amount of warpage. The second direction is again using Taguchi method to analyze the control factors of process parameters to find out the optimal parameters for the minimum amount of warpage. Result shows that increasing packing pressure, melt temperature, mold temperature and packing time are helpful for reducing amount of warpage. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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