Sand mark

Japanese: sand mark(英語表記)sandmark
Sand mark

...If the cause is the mold, improve the moisture content and permeability of the casting sand and thoroughly remove gas. (3) Sand mark A defect caused by slag or sand grains trapped on the surface or inside of a casting. Not only does it impair the appearance of the casting, it also damages tools during machining. It is caused by improper casting methods, casting sand, or pouring work.

*Some terminology explanations that mention "sand mark" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…鋳型に原因する場合は,鋳物砂の水分量,通気性を改善し,ガス抜きを十分に行う。(3)のろかみ・砂かみsand mark 鋳物の表面または内部にスラグや砂粒を巻き込んだ欠陥で,鋳物の外観を害するだけでなく,機械加工の際に工具を傷める。鋳造方案,鋳物砂,注湯作業の不適正が原因である。…

※「sand mark」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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