History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c13.s3.10

v1.c13.s3.10

molten metal entered the mold the air from these cavities escaped through suitably provided air vents. Thus a large number of bronze coins of consistent composition, size and weight were cast in one mold and taken out after solidification. The risers and runners were broken away and the finished coins were sent to the mint. This technique of casting large number of small castings in one single mold is also being used with certain modification even today.