CN1631289A - Composite two-color coin, souvenir badge and manufacturing method thereof - Google Patents

Abstract

Disclosed is a composite two-color coin, souvenir badge and manufacturing method, wherein the inner core is made of an inner core layer and an alloying layer of magnetic material, and the manufacturing method comprises the conventional two-color coin recombination process, which includes inner core blank cold rolling, solid phase recombination, diffusion annealing, and processing parameter control.

Description

Compound double-colored coin, souvenir badge and manufacture method

Affiliated field

The present invention relates to the coin manufacturing technology, the double-colored coin of composite, Zhanghe manufacturing process.

Background technology

Along with expanding economy, automatic vending machine and various coin recognition device are used widely in daily life, and in this case, can coin correctly be discerned on vending machine or identifier, and seeming becomes increasingly conspicuous.Simultaneously, in order to improve the anti-counterfeit capability of coin, the coinage materials that needs development to have the special electromagnetic performance.

Material science and coinage development of technology for the development of the false proof of coin and identification, have been created condition.Composite has special electricity, magnetic property and corrosion resistance, and this specific character has remarkable advantages on automatic vending machine and various identification, sorting device.Simultaneously, because the compound difficulty of metal material also makes the fake producer of coin be difficult to copy.

Present novel Coin validator not only comprises parameters identifications such as traditional diameter, thickness, weight, and develops and electrical property, magnetic property and to the identification of coin limit shape.All there are a lot of patents the home and abroad.

Summary of the invention

The purpose of this invention is to provide a kind of double-colored coin with composite of magnetic, electrical property, and the manufacture method of this coin.

A kind of compound double-colored coin, souvenir badge are made up of the outer shroud and the inner core of metal material, it is characterized in that inner core outer 2 and nexine 3 are composited, and outer shroud 1, outer 2 is respectively three kinds of different metal materials with nexine 3; Nexine 3 has electricity, magnetic property, and nexine 3 thickness account for the 3-40% of whole inner core thickness.

Manufacture method: comprise the band processing technology that adopts common double-colored coin, the cold rolling combination process flow process that it is characterized in that the inner core made-up belt comprise beat rough, solid phase is compound, diffusion annealing process.

The manufacture method of the double-colored coin of composite of the present invention can realize being combined with each other with a kind of nonmagnetic substance copper alloy and another kind of magnetic material iron or nickel, makes the coin of making be shown as the color and luster of copper alloy in appearance, has certain magnetic simultaneously again.The electricity of this material, magnetic property obviously are different from common Cu alloy material, this has created dual mode with regard to the identification of giving coin: double-colored coin has appearance color intuitively, can detect coin with magnet again and whether have magnetic material, improve popular anti-counterfeit capability.

The product of this method is on structure, and this coin is that the composite with the coated magnetic material is an inner core, is outer shroud with the alloy material of another color, and composite bed had both reduced the generation of galvanic corrosion, had also improved the sight of coin.

Description of drawings

Fig. 1 is the double-colored coin base of a composite cake schematic diagram;

The specific embodiment

Double-colored coin of a kind of composite or souvenir badge, its base cake is made up of the outer shroud and the inner core of metal alloy, to be inner core be composited by the inner core nexine 3 and the copper-nickel alloy skin 2 of the magnetic composite of nickel or nickel its architectural feature, outer shroud 1 is and inner core electricity, the obvious distinguishing metal of magnetic property, can be brass; Outer shroud 1, skin 2 and nexine 3 are respectively three kinds of different materials and are combined with each other; Sandwich nexine 3 thickness account for the 3-40% of whole inner core thickness.

Above-mentioned used material can also be that copper-nickel alloy or stainless steel, outer 2 materials of inner core are that brass, inner core nexine 3 are magnetic composite for: the material of outer shroud 1.

The manufacture method of this compound double-colored coin, souvenir badge, comprise and adopting and the identical technology of common double-colored coin, it is characterized in that making respectively outer shroud band, compound inner core band, the compound rolling apparatus of employing comprises: uncoiler, guide and guard, clamping plate, roll, coiling machine; The cold rolling combination process flow process of inner core made-up belt comprise beat rough, solid phase is compound, diffusion annealing process; Cut the limit afterwards, finished product is cold rolling.

1) beat rough technology: described to beat rough technology be to wash on the unit at roller to carry out; The control technological parameter:

(1), operation thickness 1.5-2mm

(2), uncoiler diameter: 500mm

(3), crimping machine diameter: 500mm

The purpose of the rough technology of this dozen makes band 2 surfaces be coarse unglazed " hair attitude " with wire brush, remove surface film oxide and pollutant thereof and expose " fresh " metal, make surface cleaning, increased the activity of strip surface, make strip surface produce the uneven of many microcosmic, increase surface area.If this operation has problem to make the dirt of copper strip surface, oily thing, to go untotally, its influence is fatal, directly causes compound failure.In the end play when rough packing paper between the every circle of copper strips for one time, in case copper strip surface scratches.

2) compound inner core band:

With the raw material band of inner core outer 2 and nexine 3 through composite rolling mill: equipment should cleaning composite rolling before, the logical steam of roll is given heat to more than 80 ℃, upper and lower uncoiler is loaded onto brass, copper-nickel alloy, copper alloy or the stainless strip of the inner core skin 2 of beating the identical material after rough respectively, and the middle level uncoiler is loaded onto nickel strap or other magnetic band of inner core nexine 3.Respectively three layers of band are passed through uncoiler, send working roll to, three layers of band are combined into one through pressure rolling through guide and guard, clamping plate.Rolling reduction ratio should be between 65%-75%.In process of production, three uncoilers are equipped with the photoelectricity centralising device, in case the copper strips sideslip influences composite effect.

The solid phase complex parameter:

(1) 2.4 tons on tension force upper strata, 1.2 tons in middle level, 2.4 tons of lower floors

(2) mill speed 2m/min

(3) roll-force 260T

(4) rolling reduction ratio should be between 65%-75%;

3) diffusion annealing in the cold rolling combination process: control diffusion annealing parameter:

(1) diffusion annealing speed: 850 ℃ * 8min, 0.8m/min.

(2) major parameter: Hv5 is 80～86, and grain size is: 8.0～10.0

Guard time: 6-10 minute thermal treatment zone length: 6mm

The diffusion annealing purpose is to carry out diffusion annealing under protective atmosphere, makes the molecule phase counterdiffusion at very close constituent element layer material contact-making surface place, and the formation metallic bond attracts each other and reaches strong bonded.

Cut the limit: carry out shear rate at slitting line: 8.5～32m/min, shearing width: 10～300mm

Trimming process is for the raw edges compound tense cuts off as far as possible, so that postorder finish rolling.Cut the back strip width and should look next procedure requirement formulation.

Finished product is cold rolling: 1, cold rolling is to carry out on four-high mill, the control major parameter:

(1), support roller work nominal diameter: 560/215mm (minimum 502/195mm).

(2), roll-force: 1600KN.

(3), mill speed: 5m/min.

(4), depress and depress speed: the control of full hydraulic roll gap.

(5), thickness measuring: automatic measuring thickness.

Cold rolling compound inner core base cake flushing technology:

By with the outer shroud corresponding size of the double-colored coin of finished product, the base cake of the described compound inner core of punching out on high velocity ram machine or other punch press is selected the punching out gap according to the diameter of inner core base cake, greatly about about 0.15mm.

The annealing of inner core base cake, pickling, light decorations technology:

According to the difference of inner core material, adopt different annealing process, 780 ℃ of copper-nickel alloy annealing temperatures are incubated one hour; 660 ℃ of brass annealing temperatures are incubated one hour.Pickling, light decorations all adopt common coinage technology.

Printing technology

To place outer shroud 1 through the compound inner core after the above-mentioned technology 2,3, the double-colored coin of this composite, identical with the common double-colored coin of manufacturing on printing technology, on vertical double-colored printing machine, carry out.

Claims (4)

1, a kind of compound double-colored coin, souvenir badge are made up of the outer shroud and the inner core of metal material, it is characterized in that inner core skin (2) and nexine (3) are composited, and outer shroud (1), outer (2) are respectively three kinds of different metal materials with nexine (3); Nexine (3) has electricity, magnetic property, and nexine (3) thickness accounts for the 3-40% of whole inner core thickness.

2, a kind of compound double-colored coin, souvenir badge is characterized in that inner core nexine (3) is a magnetic material, and outer (2) can be copper alloy, ferroalloy, and outer shroud (1) is, copper alloy distinguishing with inner core (2), (3) electricity, magnetic property, ferroalloy.

3, the manufacture method of the described compound double-colored coin of a kind of claim 1, souvenir badge, comprise the band processing technology that adopts common double-colored coin, the cold rolling combination process flow process that it is characterized in that the inner core made-up belt comprise beat rough, solid phase is compound, diffusion annealing process: and note parameter in each technology of control;

1) beats rough technology: be the technical process that the raw metal strip surface is handled, wash on the unit at roller and carry out;

2) solid phase combination process: (1) is compound with the three-layer metal strip-rolling; Equipment should be clean before the operation, and the logical steam of roll gives heat to more than 80 ℃, loads onto the upper and lower inner core skin (2) beaten after rough and nexine (3) the raw material band of centre respectively, is rolled through composite rolling mill, and three layers of band are combined into one;

3) diffusion annealing process: diffusion annealing is carried out on ammonia decomposition continuous oven, forms metal alloy between each layer.

4, the manufacture method of compound double-colored coin according to claim 3, souvenir badge is characterized in that the parameter in described every technology:

Beating rough technology main control parameters is:

(1), thickness 1.5～2mm

(2), wire brush steel wire diameter: 0.3mm-0.4mm

(3), beat in the rough technology, metal oxide layer must be brushed, fresh metal is fully come out; The solid phase complex parameter:

(1) 2.4 tons on tension force upper strata, 1.2 tons in middle level, 2.4 tons of lower floors

(2) mill speed 2m/min

(3) roll-force 260T

(4) rolling reduction ratio should be between 65%-75%;

The diffusion annealing parameter:

(1) diffusion annealing speed: 850 ℃ * 8min, 0.8m/min.

(2) major parameter: Hv5 is 80～86, and grain size is: 8.0～10.0

Guard time: 6-10 minute thermal treatment zone length: 6mm