What Is HTHP?

HTHP is a way in which synthetic diamonds are manufactured. HTHP uses Cubic Press(mainly consist of 6 hinge sleeve) in order to recreate the environment inside of the earth.

In HTHP, there are two kinds of equipment can be used to produce the diamond: one is Cubic Press, make the carbon of graphite phase translate into diamond phase; other is Two sections of the ball press.
Generally speaking, synthesis of small particles of diamond is relatively easy, large particles of diamond needs to use the Seeding Method, which need more pressure and temperature.
At present, HTHP method is still mainly method that used to produce single crystal diamond in Industry. Its advantage is simple manufacturing process and the diamond growth speed fast—usually, within 30 minutes can synthesis single crystal diamond under 1mm to meet the demand of industry.
But the HTHP also has disadvantages, such as small diamond particles, diamond with some impurities; In addition, high temperature and high pressure for long time is produced adverse effect on equipment,
But the HTHP also has disadvantages,Such as diamond particles is small, with some impurities ;In addition, the long time high temperature and high pressure is produced adverse effect on equipment, from this led to the huge cost of production.

What We Produce

Synthetic diamond is an important material widely used in the industry, military, mine, medical, and any other business. At present, the high pressure and high temperature is the popular method in industry production in China and domestic.
We mainly focus on R&D, production and sales of high pressure high temperature (HPHT) cubic press.
Synthetic Diamond HPHT Hydraulic Cubic Press can producing and R&D for synthetic diamond powder, PCD/PDC, large single crystal diamond, diamond repair, color enhancement, etc.

The cubic press is mainly consist of host machine, hydraulic system, electric system and heating system.

The cubic press is special equipment for super-hard materials, such as diamond and also is the main equipment for super-hard material industry in China. The hinge sleeve is one of key parts for cubic press.

What We Do&Service

  1. We provide equipment production, installation, debugging and operation.
  2. We could train for installation issues of press equipment, you could also specify professional person to check and accept.
  3. About the equipment operation, we could debug and installation equipment, and then training theory and practical operation for operators at your place. If needed, we will cooperate with you in the first batch of products production.
  4. Yellow diamonds, can provide formula, as well as assist in production; white diamonds, the technical secret.
  5. We can provide you with technology of some products, such as yellow diamond. When you need to update technology, we can cooperate, can also sign a technology transfer agreement.
  6. Service life of the product is about 5 to 10 years, warranty period is one year.

Who We Cooperate

Major clients of our overseas projects are in the United States, Japan, etc.
Besides, we are the main press equipment supplier of Sino-Crystal Diamond, Zhongnan Jete Super abrasives, which are the TOP diamond, and CBN manufacturers in China. If interested, welcome to visit.

At the Exhibition

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We Are Usually Asked About:

1.Why is the hinge sleeve so important?

The hinge sleeve is the important component part of cubic press, and during the diamond synthesis process it needs to bear great pressure,so its performance directly influences the performance of cubic press, thereby affects the quality of the synthetic diamond. Therefore, in order to increase the service life of the equipment, it’s necessary to focus on quality of it.

2.What determines the performance of cubic press?

The cubic press belongs to the hydraulic equipment, about the performance of it, on the one hand it depends on the manufacture, installation precision of the hinge beam system(by six hinge sleeves assembly), on the other hand depends on the control system.

3.What is the working principle of cubic press?

At the bottom of work cylinder, use the machinery & hydraulic equipment to increase pressure from six directions, push the piston forward to produce ultra high pressure, under the action of cemented carbide anvil make raw material form sealing cubes ultrahigh pressure vessel, provide pressure conditions for the diamond growth, at the same time, heated the vessel, so the vessel could form high temperature and high pressure conditions for What is the working principle of cubic press?
At the bottom of work cylinder, use the machinery & hydraulic equipment to increase pressure from six directions, push the piston forward to produce ultra high pressure, under the action of cemented carbide anvil make raw material form sealing cubes ultrahigh pressure vessel, provide pressure conditions for the diamond growth, at the same time, heated the vessel, so the vessel could form high temperature and high pressure conditions for synthetic diamond synthesis. Electric control system and mechanical, hydraulic system need to cooperate with each other during the whole working process.

4.When cubic press is running, what problems might happen?

Because of the bottom of hinge sleeve has to bear great pressure, it is easy to fracture at cylinder bottom; “ears”- is the part that put six hinge sleeves connected together, also bear great pressure, easy to fracture. Besides, it is possible to appear coupling pin fracture, the hydraulic system failures, etc.

5.During the process of production, machine under huge pressure, easy to cause fatal damage, bring a lot of loss, how to solve or mitigate this problem?

To solve this problem, will need to consider the hinge sleeve system structure design and installation, make improvement on structure in order to reduce stress concentration: change the shape of transition circular arc at cylinder bottom and radius; change the diameter of ear hole; change the thickness of ear, etc. After data analysis, we know that change the parameters above three at the same time, it can be very effective to change the tensile stress of cylinder bottom and “ears” . When the three parameters have achieved the best combination, the tensile stress of cylinder bottom reduced by about 110MPa, the ears’ reduced by about 140MPa.

6.What type of press do you have and what were they used for?

The press type we have are Ø420 / Ø530 / Ø650 / Ø750 / Ø800 / Ø950, the number represents the cylinder diameter.The type of Ø420 / Ø530 are used for produce cemented carbide tools, others used for produce diamond, like yellow diamonds, white diamonds and so on.

7.How many kinds of synthesis equipment that commonly used for super-hard materials?

Synthetic diamond production mainly adopts the static ultrahigh pressure device in China, main types are: opposed anvil, cubic press, the latter operation is simple and production cost is relatively low, so it has larger share of the market, is the most commonly used synthetic equipment.

Didn’t Find the Answer?

We trust that this can help you, however, should you require further information, please do not hesitate to contact us with your questions, we will be pleased to be of further assistance.

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