Coin Press Machine

2.1, Production Process of Gold Coin Mold

As modern manufacturing technologies like CNC and 3D printing venture further into the world of industrial manufacturing, they also need to address the needs of companies that deal with precious metals in their production processes. CNC machining has become increasing popular among larger companies and artisan jewelers alike, who often use milling machines to carve or engrave detailed designs into pieces of metal jewelry. A CNC mill can also be used to carve wax for lost-wax casting projects. There are quite a few unique reasons why CNC can provide added value to one’s desired objects and make their operations stand out.

There are a bunch of ways that manufacturing systems can interact with precious metals. Subtractive and additive manufacturing systems can be involved in indirect ways, such as producing casts for molding as opposed to processing the actual metals. Indirect manufacturing is the safer option leading to less scrap but it takes longer and is more complicated.

CNC machines provide impressive accuracy and speed, which is especially beneficial because precious metals can be expensive, so one would want the most accurate parts possible. Luckily, metals such as gold, silver and most other precious materials are quite similar to more common metallic materials in terms of machining. This means that the process is not much different than it would normally be. While the CNC can be wasteful, the performance and ability to produce unique shapes are undeniable, particularly for an aesthetics-based industry like jewelry.

The main function of the coin mold is to press the blank gold coin or gold nugget into a designated pattern. Most of the time, when creating a coin mold, you will need a computer expert to design the best pattern that your final coin should have. This is why CNC Carving is needed to achieve the best precision.

2.2, How to Automatically Produce Gold Coins

In modern presses, a die strikes approximately 120 coins a minute. This rapid coining causes wear on the dies. Nickel alloys are among the main metals used in today’s coins but they are harder than other legacy coinage metals such as silver and gold alloys and therefore they cause even quicker die wear. 

Copper and copper alloys have been used in coinage for centuries because of their malleability and the ease with which they can be coined: however, these too wear the dies when the dies are used for too long. An infamous example is the 1955 “poorman’s double die”. This coin is sold as a replacement for the 1955 doubled die, but it is no more than die-deterioration doubling, caused by wear on the dies. When a coin is struck, the planchet is not heated.

Although the planchet would be softer and more malleable, the extra time and expense would prove too great for the mint. Thus, the metal cold flows into the die under the high pressure.

Mistakes can happen at any stage of this manufacturing process, and these mistakes are something that certain collectors look for. Coin errors that occur on the die are generally more desirable than errors made at the time of the strike.

For example, a doubled die, where a date or another device appears twice slightly offset, is often a highly desired error. Strike errors are generally unique, whereas all coins struck with an error die will have the same characteristic. This makes them more easily collectible. The most famous doubled die in the past hundred years is the 1955 doubled die Lincoln cent.

These trade for hundreds of dollars because the error can easily be seen by a casual observer. Many doubled die errors require at least a jeweler’s loupe to be seen. Doubling can occur at the hub stage as well. Some more recent errors are hub doubled. Most famously, there is a 1995 doubled die cent that is hub doubled.

Before you invest in making coins, you are supposed to learn how to understand how to use a hydraulic press. It is important for you to know that we provide all sorts of assistance, including how to choose the tonnage of a hydraulic press. However, we have included these details just in case you are unwilling to get in touch directly for one-on-one support.

3.1, Mini 1-2kg Induction Furnace for Sale

The tonnage of your hydraulic press machine plays a central role when it comes to making gold coins or coins of any other material. Note that what you need to make might differ from what you made the other time in terms of depth. Therefore, the tone must vary based on the embossing depth of your gold coins.

If you have a light workload to work on, it means there will be no real need for very high pressure on the blank gold coins, and that is where the trick lies. If you use too much force on rather light coins, you will be energy, especially when you have to take care of other expenses when making your coins. Besides energy, you might end up with a lot of inaccuracies when trying to come up with something that your client will love.

As a company, we would love for you to understand the process involved in calculating the tonnage required for various coins. This should be done in relation to the required embossing depth for your coins. That way, you will be able to reduce the chances of dealing with inaccuracies and other mistakes that might happen.

Even after that is done, the question regarding the effect of the stroke on the work should be taken care of. You don’t want a case where you deliver strokes that leave you with more work instead of making things easier for you.

3.2, By The Embossed Area of Gold Coins

When talking about the embossed area of gold coins, we are referring to the surfaces that you need embossed. The tone should vary in that if you are working on a large surface, the pressure should be concentrated evenly in the entire area, and this determines the amount of tonnage that you will end up applying on the coins.

Our coin press machine comes with features that can be used to regulate the amount if pressure applied on various coins based on the embossed surface. However, you must know that smaller surfaces tend to require additional force, and this means you will be using a little more tonnage to complete the task. Again, if you are not quite sure about how these things work, we are always here to assist.

3.3, By The Embossed Area of Gold Coins

Silver is naturally harder than gold, and steel is also way harder than silver. Therefore, you can see that you will need different tonnage to work on these metals. Gold coin press will be different compared to silver and steel coin presses, and you need to use different setups to achieve the most desired results without unnecessary inaccuracies.

When pressing gold, you won’t need a lot of pressure compared to pressing silver and steel, but other important factors might come into play, as mentioned before. We might be talking about the materials and also the surfaces that need to be worked on. Therefore, if you are unsure of anything in this regard, we are just a phone call away. Our experts will ensure that you get the best attention so that your project is not messed up.