| Title |
A Study for the High Pressure Molding |
| Authors |
정종연(Jong Yeon Jeong); 이종남(Jong Nam Lee) |
| Abstract |
In order to investigate the effect of squeeze pressure on the spingback and mechanical properties of sand mold with various clay content, moisture and size of sand grains, permeability, green compressive strength and green mold hardness were tested and dimensional change was also measured. From this experiment, the results were summarized as follows: 1) Spingback of mold was affected significantly by the magnitude of pressure but not size of grains, clay and moisture. 2) Permeability of mold decreased as the squeeze pressure and clay content of the foundry sand increased but it increased as size of sand grains increased. 3) Green compressive strength of mold increased as the squeeze pressure, clay content of the foundry sand and size of sand grains increased. 4) Green mold hardness of mold increased as the squeeze pressure, clay content of the foundry sand and size of sand grains increased. 5) Density of mold increased as the squeeze pressure, clay content of the foundry sand and size of sand grains increased. |