Abstract
Under the subject of “Porocity of aluminium and its alloys, ” many reports of researches and experiments in laboratories have already been published in various publications. It ia, however, quite significant and necessary for obtaining a particular result in actual operation at foundry to make a thorough going study on the porocity and various factors, which make the porocity in castings. This is to report on what the writer has studied on the porocity under the following captions:
1. Proceeding of reearch on the porocity for past years.
2. Solution of gas problems and degassing process.
3. Shriukage porocity
4. Mould reaction
5. Grain refinement
6. Reation between mechanical properties and air-tightness
7. Controling and manegement in foundry.
8. Special melting and casting meshod.
