The Advantages of six side cubic press

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The article expounds the advantages of six side cubic press from the aspects of force principle, anvil consumption, high quality mono-crystal diamond production, production cost, input-output ratio, equipment cost and verities of diamond etc.. It will help us to prevent return back during the process of continuous dimension enlargement. In the paper, the authors offer reference ideas from personal point of view in order to deal with the problems such as operation, big size anvil and pressure medium.

It's used to think that it was impossible for China's diamonds to surpass the world's advanced level. However, with the  six sided cubic press, new technologies such as powder catalysts, indirect heating, high-precision control, and scientific synthesis processes, the overall quality of China's diamonds, including variety, color, transparency, roundness, surface finish, TI, TTI, and strength, has significantly improved and can be said to have reached international advanced levels. The six side cubic press machine played a crucial role in this process. Without the equipment's large-scale development, it is hard to imagine that other new processes and technologies could match and improve the level of diamonds so quickly.

The six-sided cubic press is adjustable in all six directions and can be adjusted as needed, especially when we have the theory of relative balance and a high-precision control system. The pressure in all directions can be adjusted arbitrarily by people, but it must conform to the theory of relative balance to achieve a high-pressure chamber. This is a single pressure, so the degree of freedom for adjustment is much greater than that of the two-sided top press. With the theory of relative balance and a high-precision control system, our six-sided cubic press can make appropriate adjustments based on the deformation state of the synthetic column, making everything controllable and fully demonstrating its true advantages. This is why we often say that the six-sided cubic  press has more advantages than the two-sided cubic press in terms of force.

 Due to insufficient knowledge of powder catalysts and poor control precision of the equipment at that time, high-quality single crystal diamonds could not be produced for a long time. Through continuous observation, experimentation, and research on the theory and practice of high-quality diamonds in recent years, we have gained a deep understanding of this problem at its core. Although we had the six-sided cubic press at the beginning, we did not get the high-quality diamonds we expected. However, with the advancement of technology, the proportion of high-quality diamonds has gradually increased, starting at 5%, then 10%, 15%, and now up to 20% to 30%.

In recent years, the six-sided cubic press has shown strong development momentum, while the two-sided cubic press has not been able to achieve rapid development in both domestic and international markets. The fundamental reason for this is still cost or economic benefits. With the ability to produce various types of superhard material products, the two-sided cubic press does not have any particular advantages, while the six-sided cubic press has a special advantage in terms of cost.

We can take a simple example from a domestic enterprise to illustrate this. At that time, they invested over 300 million yuan and only obtained six sets of two-sided top presses. We can calculate that, with full production capacity, they produce 24 synthetic blocks per day, each block weighing between 600 to 800 carats, resulting in a daily production of 48,000 carats of diamonds. Calculated for 11 months a year, each equipment can produce 5.64 million carats annually. The six sets of equipment can produce approximately 33.84 million carats per year.

What would happen if we invested the same amount of 300 million yuan now? The main equipment investment of 220 million yuan can obtain about 150 sets of Φ700mm cylinder diameter presses (already matched). Including land and other supporting equipment, a total investment of 80 million yuan is required. With a 40-minute synthesis process and an average output of around 300 carats per block, 30 to 35 synthetic blocks can be produced per day. Each press should synthesize around 9,600 carats per day, and the annual production is 11 months. A single machine can produce more than 3 million carats per year. The annual output of 150 presses should reach 450 million carats. It should be noted that if 20/25, 25/30, and 30/40 diamonds are produced, the output will decrease slightly. From the above data, the difference between the two is almost 13 times. With such a high input-output ratio, we have full confidence that the chance of the two-sided cubic press turning over is very, very small from now on.


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