buckle

...Measures are taken to improve the fire resistance of the sand and improve the mold coating. (6) Buckle, Scab The damage caused by the expansion of the mold sand due to pouring molten metal, which is pushed out onto the casting surface, is called "buckle," and the damage caused by the molten metal washing away the sand, leaving behind lumps of sand and metal, is called "scab." Sand with low thermal expansion is used, and combustible materials are added to harden the surface layer of the mold, making it less likely to be eroded. ...

*Some of the terminology that mentions "buckle" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…砂の耐火性の向上，塗型の改善などの処置をとる。(6)しぼられbuckle，すくわれscab　注湯による型砂の膨張で，その一部が鋳肌面に押し出されてできた傷を〈しぼられ〉といい，溶湯によって部分的に砂を流し去った所に砂や地金の塊が残るものを〈すくわれ〉という。熱膨張の少ない砂を使い，可燃物を添加して，鋳型の表面層を硬化させ，侵食されにくい方案を立てる。…

※「buckle」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