The Encyclopedia of Founding

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.

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Rotary Squeezer

A shingling-machine used to consolidate and weld together the puddled balls and expel the cinder therefrom. There are many forms of squeezers, reciprocating as well as rotary. The rotary may be worked either vertically or horizontally. A strong cylindrical casing provided with an opening equal to about one fourth of its circumference forms the outside; the inside consists of a rotating cylinder, placed excentric to the casing, but with parallel faces. Both faces are deeply corrugated, and, as the inner cylinder revolves towards the small aperture, the puddled ball, entering at the widest part, is carried round and subjected to a gradually increased compression until it is forced out at the small end in a suitable shape and condition for passing through the rolls. The process is termed shingling. See MALLEABLE IRON.

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