| Customization: | Available |
|---|---|
| Application Area: | Melting |
| Feature: | High-Thermal Conductivity |
|
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https://ttwymachinery.en.made-in-china.com/product-group/GeUAbwcyhLYp/High-Purity-Graphite-Crucible-catalog-1.html
Custom Different Shape High Purity Graphite Boat Graphite Mold for Gold/Silver Casting
Material: High Purity Graphite
Purity: 99.99%
Molding Process: Machining
Application: Non-ferrous Metal and other alloy melting
| Graphite Type | Molded Type | Isostatic Type |
| Bulk Density (g/cm3) | ≥1.80 | ≥1.85 |
| Specific Resistivity (μΩ.m) | ≤10.0 | ≤13.0 |
| Flexural Strength (Mpa) | ≥30.0 | ≥42.0 |
| Compressive Strength(Mpa) | ≥60.0 | ≥85.0 |
| Elastic Modulus (Gpa) | ≤9.5 | ≤11.0 |
| C.T.E (×10-6/ºC) | ≤3.0 | ≤4.50 |
| Ash Content (%) |
≤0.1 | ≤0.07 |
Use an appropriate base (same material and equivalent size). Allow the graphite mold to expand and contract. The furnace cover should not be pressed on the crucible. In the resistance furnace, the fiber blanket should not be tightly compressed onto the crucible. The lining must be repaired and made as concentric as possible, which will prevent the flame in the flame heating furnace from deflection and impact on the crucible to ensure correct melting.
Preheating and maintenance (furnace temperature)
> Preheat for 3 hours at a constant temperature at 200 degrees;
> Preheat at a constant temperature of 700 degrees for 2 hours;
> Preheat at a constant temperature of 900 degrees for 1 hour;
> Shut down the furnace to cool the crucible to no redness;
> Then the temperature is raised to the normal aluminum melting/feeding temperature and the feeding is added in a vertical direction of 90 degrees.
Notes of operating graphite mold
Preparing the mold: Before using a graphite mold, ensure that it is clean and free from any contaminants or residual materials. Cleaning the mold with a brush or compressed air can help remove any debris or particles that may affect the quality of the final product.
Mold temperature: Graphite molds are often used in high-temperature applications such as casting or molding. It is crucial to consider the appropriate mold temperature range for your specific application to prevent thermal shock or damage to the mold. Refer to the manufacturer's recommendations or consult with experts to determine the optimal temperature range.
Lubrication and release agents: Depending on the application, using a suitable lubricant or release agent can help facilitate the release of the molded product from the graphite mold. These substances can minimize friction and prevent sticking or adhesion. However, it is essential to use compatible and recommended lubricants or release agents to avoid any adverse reactions with the mold material.
Handling and storage: When handling graphite molds, it is important to do so with care to prevent any accidental impacts or dropping that could cause damage. Avoid placing excessive force on the mold or using sharp objects that could scratch or gouge the surface. After each use, clean the mold and store it following the proper storage methods mentioned earlier.
Cooling and heating rates: Graphite molds can expand or contract when exposed to rapid temperature changes. It is advisable to control the cooling and heating rates during the molding or casting process to minimize thermal stress on the mold. Gradual temperature changes can help prevent cracking or warping.
Maintenance and inspection: Regularly inspect graphite molds for any signs of wear, cracks, or deterioration. Small cracks or defects can potentially lead to mold failure or compromised product quality. Address any issues promptly by repairing or replacing the mold as necessary.
Follow guidelines and recommendations: Always follow the manufacturer's guidelines and recommendations for operating graphite molds. They can provide specific instructions on temperature limits, pressure limits, and other essential considerations based on the design and material of the mold.
Clean and dry: Before storing graphite molds, ensure that they are clean and completely dry. Any residual materials or moisture can lead to mold degradation or mold growth. Clean the molds using a brush or compressed air to remove any debris or particles.
Apply a protective coating: Applying a thin layer of protective coating can help prevent oxidation and minimize surface contamination during storage. There are specific graphite mold release agents or protective coatings available in the market. Follow the manufacturer's instructions for proper application.
Store in a dry environment: Graphite molds should be stored in a clean and dry environment to prevent moisture absorption and potential damage. Choose a storage area with controlled humidity if possible. Avoid storing molds in areas prone to high humidity, direct sunlight, or extreme temperature fluctuations.
Avoid stacking or heavy pressure: Avoid stacking graphite molds on top of each other or subjecting them to heavy pressure, as this can cause deformation or damage. Molds should be stored in a way that distributes weight evenly and minimizes the risk of breakage.
Separate or wrap individually: If you have multiple graphite molds, it is advisable to separate them using dividers or wrap them individually to prevent contact and potential damage. This helps to prevent scratches, impacts, or accidental collisions during storage.
Regular inspection: Periodically inspect your graphite molds during storage to ensure there are no signs of damage, such as cracks, chipping, or warping. If any issues are detected, address them promptly to prevent further deterioration.
Follow manufacturer's guidelines: Always refer to the manufacturer's guidelines or recommendations for specific storage instructions and precautions. Different types of graphite molds may have specific requirements based on their composition and intended use.
Qingdao TTWY Manufacturing Co.,Ltd is a company specialized in producing casting equipment. It is located in Qingdao,a beautiful harbor city,which is convenient in transportation. Especially in graphite products, for expamle, the graphite electrode, graphite crucible, clay graphite crucible,
Isostatic graphite crucible, etc;
Q1: What information should I let you know if i want to get a quotation?
A: The required material dimension (Thickness*Width*Length,diameter*length; if possible, please kindly supply us drawings).
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