High Quality Graphite Plug for Sintering Diamond Drill Bits Graphite for Sintering

Product Description

What is Sintering process?
Sintering is a traditional process to transform the powdery material into a compact body through heat and pressure without melting to the point of liquefaction. This process involves the atoms in materials diffusing across the particle boundaries and fusing together into one piece. Sintering occurs naturally in mineral deposits, and is used as a manufacturing process for materials including ceramics, metals and plastics.
Because the sintering temperature doesn't reach the materials' melting point, it is often used for materials with high melting points, such as molybdenum and tungsten.
Powder raw material is loaded in graphite molds to be sintered or hot pressed. It actually is a heat treatment process where loose material is subjected to high temperature and pressure in order to compact it into a solid piece.
High strength graphite for pressure sinteringOur graphite is very widely used in pressure sintering processes.
Graphite sintering moulds are used to produce diamond or ceramic cutting tools.
Our customers appreciate the excellent performance characteristics of our graphite in these high-temperature processes.
The combination of exceptional thermal conductivity and a low coefficient of thermal expansion is an essential element to ensure the dimensional stability of sintering moulds.
Applicaiton of Graphite Sintering Mould
Graphite sintering moulds, also known as graphite moulds, are essential tools used in the manufacturing industry for various sintering processes. Sintering is a process of compacting and forming a solid mass of material using heat and pressure without melting it completely. Graphite moulds play a crucial role in this process, and their unique properties make them highly suitable for a wide range of applications. Here are some common uses for graphite sintering moulds:Powder Metallurgy:Graphite sintering moulds are extensively used in the powder metallurgy industry to create metal and ceramic parts. In this process, metal or ceramic powders are compressed into a desired shape and then sintered in a graphite mould. The graphite mould provides the necessary support and shape retention during the sintering process, resulting in high-quality and precise components with excellent mechanical properties.Diamond Tool Manufacturing:Graphite sintering moulds are widely used in the manufacturing of diamond tools, such as diamond saw blades, diamond saw segment, diamond grinding wheels, diamond drill bits and diamond core drills. The diamond grit is mixed with a metal or alloy powder and pressed into the graphite mould. The mould is then subjected to high temperatures and pressure, allowing the diamond and metal powders to sinter together, forming a strong bond.
What is diamond segment?
The diamond segment is a kind of artificial diamond tool used in stone cutting. It has a hard texture and strong grinding performance. These segments are sintered from very fine metal powder and diamond powder.
How is the diamond segment sintered through graphite? It is divided into several steps:
1. Customized graphite mold: According to the size of the diamond segment, typesetting is performed on the graphite mold of the specified size. Generally speaking, if the size of the segment is relatively large (about 24mm in length), the layout when fabricating use the upper, middle and lower rows for arrangement. If the segment of small and medium size (about 40mm in length) is arranged, the upper and lower layers are arranged in the way of arrangement, and other sizes will be arranged according to the actual size.
2. Molding: Material are put into the graphite mold, which are the working layer (edge material), groove, working layer (middle material).... groove, working layer (edge material). After placing them in the mold, the bolts can be tightened. Then they start to be sintered.
3. Sintering: The graphite mold is quickly energized. Due to the strong resistance of graphite, the graphite heats up rapidly under the working state of high current. When the temperature rises to a certain level, the increase of the current is controlled to maintain a constant temperature. Usually the process is called the heating and holding stage of the sintering of the segment, and this stage lasts for about 8 minutes.
Diamond impregnated core bits have different
waterway configurations. The various waterway
configurations have the function of controlling the bit
hydraulics and influence the total bit face contact area
to the rock face. Our graphite mold is used for
producing diamond impregnated core bits with different
waterway configurations.
Metal Injection Moulding (MIM):Metal injection moulding is a process that combines the advantages of plastic injection moulding and powder metallurgy. It is used to produce small, complex metal components with high precision. Graphite sintering moulds are used in the MIM process to shape the metal powders into the desired geometry before sintering. The moulds allow for intricate designs and fine features, making them ideal for producing small and intricate parts.
Our Graphite Molds for Sintering Diamond Tools:
Advantanges of Our Graphite for Sintering:
Our graphite provide superb performance in the hostile environment of extreme heat and pressure in the manufacture of metal, ceramic, and diamond tooling.
Our graphite mateirals combine high thermal conductivity with low coefficients of thermal expansion, resulting in the dimensional stability required for ceramic molds.
Technical Data of Graphite Material:
Isostatic Graphite

Property	KBD-5	KBD-6	KBD-7	KBD-7B	KBD-8	Unit
Apparent Density	1.85	1.90	1.82	1.82	1.90	g/cm3
Max Grain Size	13-15	8-10	8-10	13-15	8-10	µm
Ash value	≤500	≤500	≤500	≤500	≤500	ppm
Specific Electrical Resistivity	8-10	8-9	11-13	11-13	11-13	μΩm
Flexural Strength	46	55	51	59	60	Mpa
Compressive Strength	85	95	115	121	135	Mpa
Shore Hardness	48	53	65	70	70	HSD
Thermal Expansion (room temperature to 600ºC)	4.75	4.8	5.8	5.8	5.85	10-6/ºC

Molded Graphite

Property	KBG-4	KBG-5	Unit
Apparent Density	≥1.80	≥1.85	g/cm3
Ash value	≤500	≤500	ppm
Shore Hardness	≥40	≥45	HSD
Specific Electrical Resistivity	≤12	≤12	μΩm
Flexural Strength	38	41	Mpa
Compressive Strength	81	87	Mpa
Max Grain Size	25	25	μm

Vibration Graphite

Property	TSK	GSK	Unit
Apparent Density	≥1.70	≥1.72	g/cm3
Max Grain Size	≤2	≤0.8	mm
Specific Electrical Resistivity	8-10	≤8.5	μΩm
Flexural Strength	≥12.5	≥15	Mpa
Compressive Strength	≥28	≥35	Mpa
Porosity	≤24	≤20	%
Ash value	≤0.3	≤0.3	%

Advanced Production Equipment
Strict Quality Control Ensures High Quality Products
Safe Packing
Question and Answer:
Q:Are you a manufacturer or trading company?A:We are a manufacture for graphite material and graphite machined products.Q:How can you gurantee the quality?A:We have the most advanced equipments in our Lab and professional quality control team.We can gurantee each batch of the product with the stable quality.Q:Can you offer samples?A: Yes, we offer samples to testQ: Delivery time?A:Around 10 days.
Q: Shipping potA: Tianjin or main port in ChinaQ:Payment termsA:T/T,LC at sight

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