Abstract
The mathematic model of heat transfer was established by adopting heat conduction method of isotropic materials containing inner heat source in cooling stage of micro-injection molding with latent heat derived from phase change during crystallization. The finite element software ANSYS was employed in the analysis of simulation for low density polyethylene (LDPE) under the following conditions: the melt temperatures were initialized as 165, 175 and 185°C respectively, and the mold temperatures were 35 and 55°C respectively. The simulation results show that when the melts with different initial melt injection temperatures and the same mold temperature cool from 100°C to 60°C, the cooling times are almost the same. When the melts in mold with different mold temperatures cool from 100°C to 60°C, the cooling time decreases obviously with the increase of the mold temperature. The mold temperature obviously influences the molding process, while the melt temperature influences comparatively less. The finite model of injection molded parts with microstructure region considering latent heat can approximatively forecast the cavity temperature.
| Original language | Chinese (Simplified) |
|---|---|
| Pages (from-to) | 532-536 |
| Number of pages | 5 |
| Journal | Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) |
| Volume | 37 |
| Issue number | 3 |
| Publication status | Published - 1 Jun 2006 |
Keywords
- Latent heat
- Low density polyethylene
- Micro-injection molding
ASJC Scopus subject areas
- Condensed Matter Physics
- Geotechnical Engineering and Engineering Geology
- Metals and Alloys
- Materials Chemistry