A: company profile
Our cooperator Huanyu mould is the biggest producer of graphite molds in North of China, which has over 15 years of experiences on graphite mold design and producing. With the reliable factory technical support and good after-sales service, our graphite molds have covered all china market. Now, combined with export experiences of L.T TRADE, Our products will be more complete and go further. Our major products now are: graphite plate, graphite crucible, graphite ring, graphite wire saw, graphite hot cutting pieces, graphite sintering diamond segment etc. And very welcome you provide drawings and designs, we can provide OEM and ODM.
B: Why choose us
Graphite mould plays a dual role in the process of  manufacture: Heating element and Supporting mold. The quality of graphite mold is very important, will directly affect the next diamond tools' accuracy and appearance. So, which kind of graphite mold is suitable for sintering diamond tools:
- Good performance on conductivity and high rate resistivity
- Enough Mechanical Strength
- Good performance on Oxidation resistance
- Durable
Raw materials is very important, We only use Ultrafine particle structure, High purity and High graphitization raw graphite materials.
Our finished graphite mold is:
- dense structure and low porosity
- Fined surface and low rate heat-deformation
- High mechanical strength and machining accuracy
- Oxidation resistance and durable
C: Product features
1. The processing materials are ultrafine granule structure, high purity and graphite with high graphitization degree.
2. High hardness, good anti-oxidation performance and high machining accuracy
3. Good conductivity, high resistivity, sufficient mechanical strength
4. Small porosity and dense structure.
5. Excellent thermal shock resistance, conductive and thermal conductivity.
6. High temperature resistance, corrosion resistance, acid and alkali resistance, good wear resistance.
7. Surface can be treated with anti-oxidation.
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D: Processing method
1. Customer provide design drawings.
2. Our technical team will check, analyze the drawings, and divide the drawing to reasonable parts if needed, and prepare proper graphite blocks . Our mechanics will design and customize grinding wheel.
3. Our workers will grinding and polishing graphite block according to the instructions of mechanics. This process may need operating few times if needed. We will strictly keep deviation within ±0.03-0.08mm.
4. Then our packing team will assembling different parts into a whole graphite mold. During the assembling period, unqualified products will be picked out.
E: Attribute table
| Density  g/cm³ | 1.75-1.9 |
| Resistivity  μΩ·m | ≤18 |
| Compressive strength  Mpa | 40-80 |
| Porosity  % | ≤26 |
| Elasticity Modulus  Gpa | 6-18 |
| Thermal expansion coefficient  10-6/ºC | 1.47-4.25 |
| Ash content  % | ≤0.5 |
| Temperature resistance  ºC | 1000-1800 |
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                           Hot-pressing graphite mold for diamond tools
A: company profile
Our cooperator Huanyu mould is the biggest producer of graphite molds in North of China, which has over 15 years of experiences on graphite mold design and producing. With the reliable factory technical support and good after-sales service, our graphite molds have covered all china market. Now, combined with export experiences of L.T TRADE, Our products will be more complete and go further. Our major products now are: graphite plate, graphite crucible, graphite ring, graphite wire saw, graphite hot cutting pieces, graphite sintering diamond segment etc. And very welcome you provide drawings and designs, we can provide OEM and ODM.
B: Why choose us
Graphite mould plays a dual role in the process of  manufacture: Heating element and Supporting mold. The quality of graphite mold is very important, will directly affect the next diamond tools' accuracy and appearance. So, which kind of graphite mold is suitable for sintering diamond tools:
- Good performance on conductivity and high rate resistivity
- Enough Mechanical Strength
- Good performance on Oxidation resistance
- Durable
Raw materials is very important, We only use Ultrafine particle structure, High purity and High graphitization raw graphite materials.
Our finished graphite mold is:
- dense structure and low porosity
- Fined surface and low rate heat-deformation
- High mechanical strength and machining accuracy
- Oxidation resistance and durable
C: Product features
1. The processing materials are ultrafine granule structure, high purity and graphite with high graphitization degree.
2. High hardness, good anti-oxidation performance and high machining accuracy
3. Good conductivity, high resistivity, sufficient mechanical strength
4. Small porosity and dense structure.
5. Excellent thermal shock resistance, conductive and thermal conductivity.
6. High temperature resistance, corrosion resistance, acid and alkali resistance, good wear resistance.
7. Surface can be treated with anti-oxidation.
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D: Processing method
1. Customer provide design drawings.
2. Our technical team will check, analyze the drawings, and divide the drawing to reasonable parts if needed, and prepare proper graphite blocks . Our mechanics will design and customize grinding wheel.
3. Our workers will grinding and polishing graphite block according to the instructions of mechanics. This process may need operating few times if needed. We will strictly keep deviation within ±0.03-0.08mm.
4. Then our packing team will assembling different parts into a whole graphite mold. During the assembling period, unqualified products will be picked out.
E: Attribute table
| Density  g/cm³ | 1.75-1.9 |
| Resistivity  μΩ·m | ≤18 |
| Compressive strength  Mpa | 40-80 |
| Porosity  % | ≤26 |
| Elasticity Modulus  Gpa | 6-18 |
| Thermal expansion coefficient  10-6/ºC | 1.47-4.25 |
| Ash content  % | ≤0.5 |
| Temperature resistance  ºC | 1000-1800 |
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The spud is main part Cutter Suction Dredger, when operation, through steel spud
Cross-cut construction method
1, the cutter suction Dredger is equipped with spud in the general area of construction, steel spud should be symmetrical cross-cut method or a steel cross-car spud digging method of construction.
2, in the area of large waves, equipped with three cable dredger positioning spud should be positioned with three cable cross-cut construction method.
3, the flow velocity in large areas or large waves, equipped with an anchor on the cable cross digging equipment cutter suction dredger, anchor cable should be used cross-cut construction method
Segment dig method
1, Trench length greater than the length of the water pipeline dredge effective extension should be segmented according to the length of the dredgers and the construction of water pipelines can Excavation.
2. Trench turnaround curve is divided into several sections require excavation of straight line segments can be linear piecewise curve approximation safe construction.
3. Trench different specifications or different schedule requirements, should be in accordance with the requirements of the contract segment.
4, navigation or interference by other factors, the construction can be segmented as needed
Shun countercurrent construction
When river construction using steel spud positioned, should adopt the downstream construction; construction should be used when using countercurrent anchor cable cross-dig construction method; when the large flow rates, and can be used under construction downstream end of the anchor to ensure safety.
Photo of our Marine Spud:
The specifications of our spud
A. General
High accuracy, fully welded, painted construction can be used for cutter suction dredger.
When the cutter suction dredger is working, two spuds insert the sea alternatively, one is main pile, always aligned pocket centerline and the other is vice pile used forward exchange, to meet dredger back and forth and meet dredging work.
B. Construction and procedure
The construction is to be built according to the drawing with rules of good workmanship and to be built the longitudinal frame system.
The construction is of rolled Steel Pipe sections with varying wall thickness, from40mm to 150mm, which are carefully manufactured and checked to ensure roundness, straightness, segment connection deflection within the specific tolerances.
C. Procedure
Pre-roll bending pf plate-Rolling of cylindrical hull-Welding the vertical seam to close the section-Heat treatment-Rolling to correct ovality-Assemble of the several pipe sections-Assemble with accessories( Sheave , expansion part etc.)
D. Materials
All fabricated steelwork used in the construction of the spud will be to manufacturing standard of classification society BV, GL, LR, DNV
All steel used to be blasted and shop primed both sides. Using DH36 and D690
All materials proposed will be selected to comply with the latest Health and Safety Rules.
Paint systems for hull protection will be of the highest quality (Hempel, Inter, Sigma, Jotun)
E. Welding
All welding will be performed in accordance with drawing and order and UniSite experience and all welding will be continuous and full penetration.
Welding seam preparation, welding method, welding material and consequent preheating temperature acc. to UniSite standards and approved by clients.
UniSite will control preheating, cooling down rate
Weld surface on the outside spud surface are to be grinded flush.
All welding to be examined UT and some to be examined X-ray.
F. Workmanship
The workmanship have good marine practice. Care are taken to ensure fair lines, smooth surfaces and neat welding.
G. Main particulars
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MAIN PARTICULARS |
|
Tolerance |
High accuracy(ISO2768, ISO5817, ISO13920) |
|
Material |
DH36, D690 with Z-quality or other materials |
|
Dimension(L*B*H) |
As per drawing, as large as we can |
|
OD |
900mm-2800mm |
|
Weight |
60Ton~400Ton |
|
Coating |
Sa2.5 blasted and two or three layers painted with highest quality |
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Marking |
as per clients' requirements |
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Inspection |
material, construction, dimension, welding seam, non defective test, paint inspection |
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Experience |
We made OD2600*63m with total 360Ton spuds for world top dredging company. |
|
Others |
Recyclable, in line with environmental requirements and standards, and reliable |
Marine Spud
High Quality Dredge Spud,Customized Dredge Spud,Customized Weld Spud,Marine Dredge Spud
Unisite Group Ltd. , https://www.shipsparts.nl