  |
To eliminate surface defects and improve the quality of molded parts, increasing the mold temperature is one of the solutions. Using high mold temperature can eliminate weld lines, reduce molding pressure, residual stress and clamping force and improve part surface quality. However, with the increasing of mold temperature, the cycle time will also be increased. Hence, people have paid the attention to mold temperature control technologies. Among them, the variotherm molding technologies, including Rapid Heat Cycle Molding (RHCM), Induction Heating Molding (IHM), and Electricity Heating Mold (Emold), are some effective methods. Although those variotherm technologies have been proposed, how does the external or internal heating source affect the injection molding process and the final product? The true function and the efficiency study of each technology still remain vague. Hence, in this paper, we have systematically conducted various technologies, including Conventional Injection Molding (CIM), RHCM, IHM, and Emold, by using true 3D transient cool technology. Through the inside mechanism investigation at various moments in time, the functions and the heating-cooling efficiency for each technology can be visualized. Besides, experimental study and verification of IHM are also performed.
From C.-T. Huang 1 | I.-S. Hsien 1 | C.-H. Tsai 1 | Y.-C. Chiou 1 | C.-C. Tang 2
1CoreTech System Co., Ltd., Hsinchu County, Taiwan, R. O. C.
2Dragonjet Co., Ltd., Taipei, Taiwan, R. O. C.
2Dragonjet Co., Ltd., Taipei, Taiwan, R. O. C.
(Received 29.10.2010; accepted 14.03.2011)
Appeared in International Polymer Processing 2011/03, Page 265-274
DOI: 10.3139/217.2436
Direct link: http://www.polymer-process.com/IPP2436
Pay content
The Effects of Various Variotherm Processes and Their Mechanisms on Injection Molding [1,09 MB]
Free access for subscribers. PPS-Members: For Access Password please contact your Society.
References
1 Chang, R. Y., Yang, W. H.: “Numerical Simulation of Mold Filling in Injection Molding Using a Three-dimensional Finite Volume Approach”, Int. J. Numer. Meth. Fluids, 37, 125–148 (2001)., DOI: 10.1002/fld.166
2 Chen, S. C., et al., “Dynamic Mold Surface Temperature Control for Molding High Gloss, Painting Free Part Surface Achieving Cycle Time and Cost Reduction”, SPE ANTEC Tech. Paper, 1360–1364 (2009).
3 Chen, S. C., et al., “Three-dimensional Simulation of Transient Temperature Distribution for Lens Mold Embedded with Heaters”, SPE ANTEC Tech. Papers, 631–635 (2004).
4 Chen, S. C., et al., “Dynamic Mold Surface Temperature Control Using Induction and Heater Heating Combined with Coolant Cooling”, Int. Polym. Proc., 5, 457 –463 (2006).
5 Chen, Y., et al., “True 3D and Fully Transient Mold Temperature Simulation for RHCM Process”, SPE ANTEC Tech. Papers, 1295 – 1298 (2006).
6 Chiou, Y., et al., “Integrated True 3D Simulation of Rapid Heat Cycle Molding Process”, SPE ANTEC Tech. Papers, 2577–2580 (2007).
7 Chiou, Y., et al., “Thermal Feature of Variotherm Mold in Injection Molding”, SPE ANTEC Tech. Paper, 2491 –2495 (2009).
8 Kang, M. H.: “Wonder Injection Molding with Momentary Mold Surface Heating Process (E-MOLD Process)”, CAE Molding Conference, Paper A15 (2007) OSK (Ono Sangyo) RHCM Overview: website information, http://www.onosg.co.jp/en/rhcm/index.html.
9 Turng, L. S., Wang, K. K.: “A Computer-aided Cooling-line Design System for Injection Molds”, J. Eng. Ind., 2, 161–167 (1990).
10 Yang, W. H., et al., “Integrated Numerical Simulation of Injection Molding Using True 3D Approach”, SPE ANTEC Tech. Paper, 486 –490 (2004).
|
| © 2013 by Carl Hanser Verlag |
Navigation
- Current issue
- Volume
- Search
- Top 20 Downloads
Subscriber Support
abo-service@hanser.de
PPS-Members: For Access Password please contact your Society.
For authors:
Information on article submission
- Volume
- Search
- Top 20 Downloads
Subscriber Support
abo-service@hanser.de
PPS-Members: For Access Password please contact your Society.
For authors:
Information on article submission
Document number