| Project/Area Number |
18560200
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Thermal engineering
|
|---|
| Research Institution | Okayama University |
|---|
Principal Investigator |
HORIBE Akihiko Okayama University, Graduate Scheel of Natural Seience and Technology, Division of industrial innovation sciences, Associate professor (50229241)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
HARUKI Naoto OKAYAMA UNIVERSITY, Graduate school of natural science and technology, Division of industrial innovation sciences, Research associate (10311797)
|
|---|
| Project Period (FY) |
2006 – 2007
|
| Project Status |
Completed (Fiscal Year 2007)
|
| Budget Amount *help |
¥3,860,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥360,000)
Fiscal Year 2007: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2006: ¥2,300,000 (Direct Cost: ¥2,300,000)
|
|---|
| Keywords | Freeze mold method / Sand mold / Freezing / Cold air / Reduce environmental load |
|---|
| Research Abstract |
This research reports the freezing characteristics of sand molded with "the freeze mold method". The freeze mold method is the casting process where little water is added to cast sand then they are frozen and become harden as a mold. Instead of using organic hardener, this molding technology possibly reduces resources and environment loading.
e aimed at the practical application of the freeze mold method and chose cold airflow as the medium taking heat away from the mold. At first the sand with water was filled into a rectangular container that is the test section. Then cold air flowed into the container. Consequently, the mold was cooled and frozen by the cold airflow.
The freezing behavior of the sample by cold airflow was investigated experimentally under the conditions of added water amount, superficial velocity, inflow air temperature and fixed bed height As a result, the freezing completion time becomes long as the added water amount increases. However, an increase in the added water amount doesn't influence the pressure loss of the test section so much. Moreover, the empirical equation was derived to predict the freezing completion time.
On the other hand, the heat and mass transfer characteristics in the cast sand were investigated, when the molten metal, which has the low-melting point, was fed into the frozen cast sand,.
Additionally, numerical analysis of the freezing behavior about the water in the cast sand by cold airflow was carried out. The results of the numerical analysis give close agreement with the experimental results.
|
