糖蜜を添加したセメント鋳型による鋳造欠陥について

機関リポジトリ 機関リポジトリ (HANDLE) オープンアクセス

書誌事項

タイトル別名
  • Casting Defects Occurable to Cement-Bonded and Molasses-Added Molds

この論文をさがす

説明

This paper is a report of study on the casting defects occurable to cement-bonded and molasses-added mold, concerning to the permeability of mold and the pressure of gas from core in pouring process of cast iron and aluminum alloy. Results are obtained as follows:1) Permeability of the testing sand after 24 hours' drying at room temperature shows 210-290. This figure means that the cement-bonded molds have good permeability. 2) The pressure of gas from core changes under influence of water and molasses. Higher gas pressure caused by higher water content tends to produce more gas-originated defects. 3) Improper decrease of water content tends to cause other type of casting defects, such as rough surface, sand hole, sand inclusion. So, a proper mixing ratio of additions should be selected to produce sound castings; for example, weight ratio of sand 100, cement 10, water 5 ～6, and molasses 3～4, for our experimental conditions, can be recommended.

紀要論文

収録刊行物

詳細情報 詳細情報について

問題の指摘

ページトップへ