Bullet-mould
This entire mould consists of a pair of hinged cheeks, with one or more spherical cavities reamed therein, connecting with an ingate through which the melted lead is poured. They must fit exceedingly close when brought together.
Twelve hundred entries from the golden age of cast metal — how bells are founded, why brass is not bronze, what a cupola melts and a core withstands — by Simpson Bolland, the trade's great teacher.
This entire mould consists of a pair of hinged cheeks, with one or more spherical cavities reamed therein, connecting with an ingate through which the melted lead is poured. They must fit exceedingly close when brought together.