CN85105261A - Gold-plated coin, badge and token - Google Patents

Abstract

But a kind of gold-plated coin or coin blank, badge or badge blank, token or token blank have a core body that tow sides and circumferential edges is arranged and become coin with the coinage metal material processing.A kind of copper---tin is electroplated clad and has been coated this core body fully and a flavous outward appearance is provided.This plating clad contains the tin that accounts for weight 8% to 16% greatly, and all the other are copper basically, and has the thickness of about 10 to 150 μ M.

Description

Gold-plated coin, badge and token

The relevant gold-plated coin of the present invention, badge or token and the blank that is used to produce coin, badge or token that is to say metal base or have finished product coin, badge or the token of gold colored appearance.

In view of the life-span of bank note shorter, comparing bank note with coin is the bigger currency form of cost; So many countries or plan to replace bank note with coin.Bank note is not attractive like that as low face amount currency, and inflation has caused also that bank note is signifying low face amount currency now in many countries certainly.A kind of bank note of low face amount currency of coming to this is replaced by coin.

Stipulate that in many countries low face amount coin has coppery, middle and high par value coin has silvery white.In the past, silver-colored, golden coin is used for the higher currency of face amount, is only to be today for the value of numismatics or as a kind of appropriate format of gold bullion and manufactured.Yet, to such an extent as to being so expensive current gold coin, gold constituted by the golden coating of a parent metal core and one deck extremely thin (approximately only have 1-2 μ M thick), this meagre golden coating thickness probably can be worn in the normal service life of coin, until exposing the parent metal core, and the intrinsic value of gold also will lose.

Produce the gold-plated coin of gratifying low cost and done many trials as the higher currency of face amount.The brass that generally has 70% red copper and 30% zinc is common yellow coinage alloy, but it tarnishes during use easily, and it interrelates with the low-quality cheapness in the eyes the public.Done a trial recently and overcome this problem, replaced 5% zinc with nickel, but its as a result color be golden yellow there's no one who doesn't or isn't as say so faint yellow.In another kind was attempted, using a kind of composition was the alloy of the aluminium of 92% red copper, 6% nickel and 2%, but this combination has a kind of pale red, and was tending towards becoming coffee color during use.People also did the other that uses other alloy composition and attempted, but did not have a kind of long-lived gratifying golden yellow outward appearance that has.

Another problem is that the low melting point brass of pure matter and the common yellow coin of bronze are forged easily.Thing followed problem is, for the coin that is used on the vending equipment that starts by coin the physical property that can be checked must be arranged, such as, weight, size, electrical and magnetic, device set on the vending equipment is distinguished out desired coin according to these character from the counterfeit of the vacation of other coin and the coin that requires.For example, the above-mentioned improved nickel brass coin that contains is non magnetic, so the vending equipment that it can not only be accepted magnetic coin is accepted.Further problem is, the coin blank must be easy coinage, that is to say, it must be enough soft so that in desired sign being molded into the lip-deep coinage production process of coin, it is easy to be shaped with Mould Machining.The coin blank must be not too hard, otherwise expensive coin mould quick-wearing perhaps will form the shallow impression that does not meet the requirements very on the coin of producing.Because the coin mould is expensive, do not wish that therefore it crosses quick-wearing.

So, the purpose of this invention is to provide a kind of gold-plated coin that addresses the above problem, that is to say the gold-plated coin that a kind of producing cost is lower, it is all having gratifying service life aspect qualified color and other physical property such as the mar proof.It is applicable to the vending equipment of being opened by coin, coin is housed on this equipment screens device to check physical property, comprises electrically and magnetic that it is not easy to forge.

According to the present invention, coin, badge or token goods (coin that promptly produces, badge or a token, or be used to produce the blank of coin, badge or token) but the core body of the coin shapes that a usefulness coinage metal material makes is arranged, tow sides that this core body has and circumferential edges, and one contain enveloping core body fully and the plating clad of long-lived golden yellow outward appearance during use being provided of copper and tin.This is electroplated clad and can contain and account for about tin of 8% to 16% on the weight, and preferable is about 11% to 14%, and remaining is copper basically.Electroplating clad approximately is from 10 to 150 μ M at each surperficial thickness of core body, better approximately is from 30 to 50 μ M, and the gross weight of electroplating clad can be the about 2% to 26% of goods gross weight, is more preferably about 6% to 10%.

Although as catch, be known with the plated metal goods that produce the bronze ware glossy surface by people with copper-ashbury metal, yet people also know clearly: the bronze of the described composition particularly bronze when the proportioning capping of tin is a kind of carbide alloy, it is not easy rolling or is processed into ribbon, that is to say that it can not be processed into monetary product usually.Therefore the bronze in above-mentioned composition scope generally can not be thought of as the material that is used to make currency.And the cost of considering tin is higher, and the alloy that the stanniferous amount is so high does not generally consider to be used for coinage yet.

Yet, observe according to the present invention, above-mentioned coin, badge or token goods have an acceptable permanent durable gold-plated outward appearance, promptly has gratifying Kang Xiu Erosion ability, and has a suitable core material through selecting, the easy coinage of this material, and have the coin device for sorting of the routine in the suitable performance cause automatic vending machine to check and accept.Coin produced according to the invention, badge or token goods are cheap, and have gratifying service life.And compare with the coin with homogeneity composition, coin produced according to the invention, badge or token goods are not easy to be forged.

Coin, badge or token blank can for example use a kind of suitable copper-tin bath solution on the barrel plating equipment according to the present invention, with the Canadian Patent of publishing on January 13rd, 11,093, the United States Patent (USP) of publishing with 16 days suitable Mays in 1978 for No. 498 4, the mode of 089, No. 753 foregoing description is produced.

As above-mentioned, the material of metallic core coinage easily, and select in order to obtain low cost, screening device for coin provides property and provides best for forgery and take precautions against.For example, this core material can comprise iron, steel or stainless steel, nickel, nickel-plated steel, zinc, copper or the various copper alloy that contains zinc and/or nickel and/or tin.Have realized that the core body of aluminum or aluminum alloy also can use so if carry out suitable preliminary treatment.

In some cases, before electroplating or plating back core body is annealed effectively, for standard national currency processing gives blank with suitable soft.Annealing after the plating also is favourable in following situation, i.e. electro-coppering in annealing-Xi clad and counterdiffusion mutually between the core material can produce the binding effect on a kind of metallurgy.If core material is enough soft for coinage,, so just can omit annealing such as containing zinc.

The further advantage of this coin is: its surperficial friction of coin produced according to the invention, badge or token is less, can separate manufactured goods from the flange of coin manufacturing mould with comparalive ease after the compacting.

Test shows, gold-plated coin with nickel core body produced according to the invention, to similar physical property can be arranged for it has designed nickel or nickel-plated steel coin that coin starts goods selling equipment, comprise magnetic, therefore, start goods selling equipment for this coin, can replace previous coin and need not to make any change.In addition, have mainly and constitute by copper, zinc, nickel alloy, the gold-plated coin of the core material through selecting especially shows: the electromagnetic type coin in the modern times starts the unique repercussion that has noncontinuity in the goods selling equipment, like this for taking precautions against the pseudo-security that height is provided of bringing up.

Illustrate the production that has the gold-plated coin of nickel core body according to of the present invention now.

25 kilograms of solid nickel bases that are compressed into the wheel rim shape are put in the horizontal electro-plating roller of rotation with holes this tube length 91cm, diameter 36cm as once feeding intake.Cylinder passes a clean cycle system, and this system is included in thermokalite detergent, hot water, cold water and contains in the liquid of 10%HCL rinsing and enter rinsing in the cold water again.

After the last rinsing, cylinder is immersed in about every liter of alkaline copper-tin bath solution that contains 32 gram copper and 26 gram tin.Temperature of electroplating solution is 75 ℃, gives 431 amperes electric current, with 6.25 volts of voltages.Left electroplate liquid with back roll in 36 hours, then by cold rinse and anti-rust Erosion rinsing.

After the plating, find to have on the blank weight to equal to electroplate the plating adhesion layer of back billet weight 9.1%.The content of tin is 13.0% in the adhesion layer, and remaining is a copper.On the thickness surface of plating adhesion layer is 43 μ M, and the edge is 105 μ M.

Blank after electroplating is set at 750 ℃ production annealing furnace by a furnace temperature, and blank stops 12 minutes with reduction hardness at hot warm area, approximately drop to 32 from 78 of 30T Rockwell apparatus dial.Blank after the annealing is cleaned, polishes, and improves fineness then in the two step operations of being made up of succeeded by the washing agent press polish pickling.Blank after the polishing is suppressed with the mould of chromium plating, produces bright and glossiness golden yellow coin.

Although foregoing major part is relevant with coin, notice that also the present invention can be applied to badge or token equally.Other concrete facility of the present invention is easy to come to understand that the veteran people of process aspect scope of the present invention is limited in the additional claim for one.

Claims (11)

1, a kind of gold-plated coin, coin blank, badge, badge blank have: but one with positive and negative two sides and circumferential edges and the coin core body made with the metal material of coinage; A kind ofly contain having coated core body fully and the plating clad of golden yellow outward appearance being provided of copper and tin, described plating clad contains the tin that accounts for weight 8% to 16% greatly, and remaining is copper basically, and has about thickness of 10 to 15um.

2, a kind of coin, badge or token goods of producing according to claim 1 are wherein electroplated clad and are contained the tin that accounts for weight 11% to 14% greatly.

3, a kind of coin, badge or token goods of producing according to claim 1, wherein electroplating coating thickness approximately is 30 to 50 μ M.

4, a kind of coin, badge or token goods of producing according to claim 1, the weight of wherein electroplating clad approximately is 2% to 26% of product weight.

5, a kind of coin, badge or token goods of producing according to claim 4, the weight of wherein electroplating clad approximately be goods weight 6% to 10%.

6, a kind of coin, badge or token goods of producing according to claim 1, wherein core body comprises iron, steel or stainless steel.

7, a kind of coin, badge or token goods of producing according to claim 1, wherein core body comprises nickel or nickel alloy.

8, a kind of coin, badge or token goods of producing according to claim 1, wherein core body comprises zinc or kirsite.

9, a kind of coin, badge or token goods of producing according to claim 1, wherein core body comprises copper or copper alloy composition.

10, a kind of coin, badge or token goods of producing according to claim 1, wherein core body comprises the aluminum or aluminum alloy of handling through suitably giving.

11, a kind of coin, badge or token goods of producing according to claim 1, wherein electro-coppering-zinc clad is bonding with the method for phase counterdiffusion and core body on metallurgy.