TH25825B - Bi-metal coins and their methodology for the manufacture of coins. - Google Patents

Abstract

A medal or a bi-metal award And the method for producing this coin, which is easy to form a ring. And the inserts that make up this coin or medal but still have a low cost. And can make sure the strength Higher connection between ring and insert This includes processes for ring forming by inserting a first metal through the blanking, anenel and acid washing, a thicker insert forming than the ring by metal conduction. The second goes through the blanking and Anneal. Thick edge formation on each side And a ring-shaped ridge around the surface around the shape of the insert And acid washing of the inserts and the connection of rings and inserts by causing the plastic flow of the inserts ridges. In the periphery of the ring, through compression of the inset inserts in the center of the ring and the two metal medallions that have been formed in this way,

Claims (8)

1. A two-metal coin consisting of a ring (1) and an insert (2) that are attached to the ring (1), which has been characterized by that the ring (1) has a cross section. The rectangular cross section and the inner surface of the ring (1) have no grooves.With this, before the ring (1) and the insert (2) are joined together, this insert (2) will have The (3) ring-shaped spines lie around the peripheral surface of this insert, along the thickening edges on each side of this insert. And the initial thickness Thicker than the ring (1) .With this, the ring (1) and the insert (2) are joined together by being This causes the plastic flow of the spine (3) of the insert (2) into the perimeter. The inside of the ring (1), through compression, the insertion piece (2) has been inserted in the middle of this ring (1). 2. A two-metal coin according to claim 1, which was previously joined together.The thickness of the insert (2) is 1-3% thicker than the thickness of the ring (1). 3. A two-metal coin pursuant to Clause 1 or 2, which was previously This ring (3) is joined to a height equal to 0.05-0.25 mm from the surface of the perimeter. And a width that is 20-50% of the thickness of this insert (2) 4.Methods for bi-metal coin forming Which includes processes for; Forging of rings (1) by introducing the first metal through banning, annylation and acid washing; The inserts (2) are formed to be thicker than the rings (1) by adopting a second metal. Go through the blanks and Anneal; The thickening edge formation on each side and the annular ridge (3) around the perimeter of the insert (2) and acid washing of the insert (2); And the connection of the ring (1) and the insert (2) by causing the metal flow The plastic of the spine (3) of the insert (2) enters the inner perimeter of the ring (1) through the insertion piece (2) that is inserted into the center of the ring (1). ) This 5. Method according to Clause 4, where the initial thickness of this insert (2) has been formed to be 0.01 square meters thicker than the initial thickness of this ring (1). 0.3 mm. 6. Method for claiming rights in Clause 4 or 5, where the ridge (3) is in the middle along the The perimeter of the insert (2) has a height of 0.05 to 0.25 mm and a width of 20 to 50% of the initial thickness of the insert (2). 7.Method for claiming the rights in any of Clause 4 to 6 Where all thickness Between the two edges of the insert (2) has been formed to equal 105 to 130% of the initial thickness of the insert (2). 8.Method of requesting to claim the rights in any of Clause 4 to 7 Where the stiffness of the ridge (3) of the inserted insert (2) is 10 to 20% more rigid than the others.