ODD-FORM COIN AND ODD-FORM COIN MANUFACTURING DEVICE AND PROCESS

摘要

An odd-form coin. The odd-form coin is polygonal and is made of a solid metal material. The diameters of the circumcircles of the odd-form coin have a tolerance value being ±0.04 mm, and have the diameter differences being smaller than or equal to 0.06 mm. The surface of the odd-form coin is provided with a protruding portion along the circumference. The protruding portion has internal and external clear edges, and the phase tolerance of the internal and external clear edges is ±1°. Patterns are formed on the side wall of the edge of the odd-form coin, and the patterns are pits.