Molding frame - Iwaku

Japanese: 鋳枠 - いわく
Molding frame - Iwaku

…The molding sand is prepared in advance, that is, the sand and binder are thoroughly mixed. First, a molding flask is placed over the pattern, and molding sand is poured in and tamped down. The flask is used to make the mold easier to handle when combining the upper and lower halves, and to prevent the upper and lower halves from coming apart due to the pressure of the molten metal, or to prevent the mold from collapsing; however, its shape, size, and precision affect the efficiency of the pouring process and the quality of the casting. …

*Some of the terminology that refers to "frame" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…前もって鋳物砂の処理,すなわち砂と粘結剤とをよく混練しておく。まず模型に鋳枠をかぶせて鋳物砂を込め,突き固める。鋳枠は,上型と下型を組み合わせる際に鋳型の取扱いを楽にし,上・下型の結合不整合や,溶湯の圧力による上・下型の分離,型の崩壊を防ぐために用いられるものであるが,その形状,大きさ,精度は鋳込作業の能率,鋳物の良否に影響を与える。…

※「鋳枠」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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