"Rimming machine"

The cycle principally consists of the shearing of the metal strip to start with, acquired with specifications dictated by the production plants and the technology adopted both with regard to the width and finished thickness of the coins to be.

"Cold rolling mill"

VERRES SpA has the possibility of carrying out cold rolling operations in order to reduce or correct to the desired thickness the metal strips not available on the international market according to the required purchase specifications, thus guaranteeing a sure constancy in the production and quality capacities. In the subsequent deburring phase the thins “burrs” produced during the shearing operation are removed by means of a tumbling operation, piece against piece, before passing on to the edge-making (rimming) phase in which the profile (border) of the semi-processed coin is obtained in accordance with the project design.
 

"Steel coin blanks"

"Pickling line"

The work hardening that the blanks are subjected to in the previous cold molding processes, to the detriment of the quality of the minting as well as the wearing of the cones, is all overcome by means of a re-crystallization heat treatment (workshop annealing) in a controlled atmosphere (meaning a slightly reducing environment for limiting surface oxidization).
Following there are the pickling and polishing operations which respectively remove the surface oxides caused by the heat treatment and confer the final brilliance.
The subsequent selecting operation (grading) allows for checking the geometric characteristics and above all, the surface features (absence of inclusions, flaking, blisters, spots, etc.); if carried out automatically this is associated with the last operation of packaging, guaranteeing the correct weight required in the specific numbered and sealed containers ordered by the customer.

"Degreasing "

The previous phases are similar, though with different sequences, to the production of the rings.
The shape of these rings is obtained starting off with the punching of the coin blanks (also incorrectly known as re-shearing), as well as a subsequent degreasing operation for eliminating the oil used during the shearing.
Depending on the design, the crimping operation is carried out on the ring which consists of creating a special seat, covered by the I.PZ.S. - VERRES SpA patent, to allow for a more secure assembly between the inner and the ring of the future bimetallic coins, the last operation that it is possible to carry out with a high speed press.