A Study on the Void Formation in Residual Wall Thickness of Fluid-Assisted Injection Molding Parts
In fluid-assisted injection molding, the distribution of the residual wall thickness on the inside and outside of the curved area is different, and void is formed due to the effect of the shrinkage on the outside where the residual wall thickness is thicker. The shrinkage that takes place in the res...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2014/238251 |
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| author | Hyung-Pil Park Baeg-Soon Cha Soo-Bin Park Jae-Hyuk Choi Dong-Han Kim Byung-Ohk Rhee Kye-Hwan Lee |
| author_facet | Hyung-Pil Park Baeg-Soon Cha Soo-Bin Park Jae-Hyuk Choi Dong-Han Kim Byung-Ohk Rhee Kye-Hwan Lee |
| author_sort | Hyung-Pil Park |
| collection | DOAJ |
| description | In fluid-assisted injection molding, the distribution of the residual wall thickness on the inside and outside of the curved area is different, and void is formed due to the effect of the shrinkage on the outside where the residual wall thickness is thicker. The shrinkage that takes place in the residual wall is affected by the rheological changes in the polymer caused by temperature change and also by the thermal properties of the penetration fluid. In this study, the different effects on void formation in residual wall during fluid-assisted injection molding were analyzed, and water and silicone oil that had different thermal properties were used for the fluids. For this, heat transfer analysis and injection molding analysis were conducted. The void formation occurred due to the different temperature distribution and volumetric shrinkage in the direction of the residual wall in the curved area with a hollow section. It was also found that the void formation in the curved area decreased in the case of silicone oil compared to the case of water from simulation and experiments. |
| format | Article |
| id | doaj-art-c3d9cfb3eafb47dfb34425108602634f |
| institution | DOAJ |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-c3d9cfb3eafb47dfb34425108602634f2025-08-20T03:23:11ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422014-01-01201410.1155/2014/238251238251A Study on the Void Formation in Residual Wall Thickness of Fluid-Assisted Injection Molding PartsHyung-Pil Park0Baeg-Soon Cha1Soo-Bin Park2Jae-Hyuk Choi3Dong-Han Kim4Byung-Ohk Rhee5Kye-Hwan Lee6Molding & Forming Technology R&D Group, Korea Institute of Industrial Technology, 7-46 Songdo-dong, Yeonsu-gu, Incheon 406-840, Republic of KoreaMolding & Forming Technology R&D Group, Korea Institute of Industrial Technology, 7-46 Songdo-dong, Yeonsu-gu, Incheon 406-840, Republic of KoreaDepartment of Mechanical Engineering, Ajou University, San 5 Woncheon-dong, Yeongtong-gu, Suwon, Kyungki-do 443-749, Republic of KoreaDepartment of Mechanical Engineering, Ajou University, San 5 Woncheon-dong, Yeongtong-gu, Suwon, Kyungki-do 443-749, Republic of KoreaDepartment of Mechanical Engineering, Ajou University, San 5 Woncheon-dong, Yeongtong-gu, Suwon, Kyungki-do 443-749, Republic of KoreaDepartment of Mechanical Engineering, Ajou University, San 5 Woncheon-dong, Yeongtong-gu, Suwon, Kyungki-do 443-749, Republic of KoreaDepartment of Manufacturing Engineering, University of Texas Pan-American, Edinburg, TX 78539, USAIn fluid-assisted injection molding, the distribution of the residual wall thickness on the inside and outside of the curved area is different, and void is formed due to the effect of the shrinkage on the outside where the residual wall thickness is thicker. The shrinkage that takes place in the residual wall is affected by the rheological changes in the polymer caused by temperature change and also by the thermal properties of the penetration fluid. In this study, the different effects on void formation in residual wall during fluid-assisted injection molding were analyzed, and water and silicone oil that had different thermal properties were used for the fluids. For this, heat transfer analysis and injection molding analysis were conducted. The void formation occurred due to the different temperature distribution and volumetric shrinkage in the direction of the residual wall in the curved area with a hollow section. It was also found that the void formation in the curved area decreased in the case of silicone oil compared to the case of water from simulation and experiments.http://dx.doi.org/10.1155/2014/238251 |
| spellingShingle | Hyung-Pil Park Baeg-Soon Cha Soo-Bin Park Jae-Hyuk Choi Dong-Han Kim Byung-Ohk Rhee Kye-Hwan Lee A Study on the Void Formation in Residual Wall Thickness of Fluid-Assisted Injection Molding Parts Advances in Materials Science and Engineering |
| title | A Study on the Void Formation in Residual Wall Thickness of Fluid-Assisted Injection Molding Parts |
| title_full | A Study on the Void Formation in Residual Wall Thickness of Fluid-Assisted Injection Molding Parts |
| title_fullStr | A Study on the Void Formation in Residual Wall Thickness of Fluid-Assisted Injection Molding Parts |
| title_full_unstemmed | A Study on the Void Formation in Residual Wall Thickness of Fluid-Assisted Injection Molding Parts |
| title_short | A Study on the Void Formation in Residual Wall Thickness of Fluid-Assisted Injection Molding Parts |
| title_sort | study on the void formation in residual wall thickness of fluid assisted injection molding parts |
| url | http://dx.doi.org/10.1155/2014/238251 |
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