{"id":2023,"date":"2025-11-25T16:10:22","date_gmt":"2025-11-25T08:10:22","guid":{"rendered":"https:\/\/www.c-adtech.com\/?post_type=product&p=2023"},"modified":"2026-01-27T10:59:21","modified_gmt":"2026-01-27T02:59:21","slug":"distribution-plate","status":"publish","type":"product","link":"https:\/\/www.c-adtech.com\/ja\/product\/distribution-plate\/","title":{"rendered":"\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u30fb\u30d7\u30ec\u30fc\u30c8"},"content":{"rendered":"
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Adtech Distribution Plates provide a statistically significant improvement in aluminum billet quality by ensuring uniform molten metal distribution and temperature homogeneity during Direct Chill (DC) casting. Cast houses utilizing our high-density calcium silicate plates report a reduction in scrap rates due to uneven grain structures and an increase in casting consistency. If you are a plant manager or engineer seeking to eliminate turbulence and oxidation inclusions in your aluminum logs, the Adtech Distribution Plate is the distinct solution designed for this specific thermal environment.<\/p>\n

Understanding the Role of Distribution Plates in DC Casting<\/h2>\n

The casting process for aluminum alloys requires absolute precision. A distribution plate is not merely a consumable. It is the final control point before the molten aluminum solidifies. Located inside the hot top header, this component dictates how the liquid metal flows into the mold.<\/p>\n

Adtech designs these plates to manage the velocity and direction of the flow. When molten aluminum enters the mold, it must do so without creating turbulence. Turbulence causes oxide films to fold into the melt. These inclusions create weak points in the final product. Our plates utilize specific nozzle designs and hole patterns to laminarize the flow. This ensures that the metal enters the solidification zone calmly.<\/p>\n

The Physics of Flow Control<\/h3>\n

The primary function involves hydraulic management. As aluminum flows from the launder through the downspout, it carries kinetic energy. The distribution plate absorbs this energy. It redistributes the metal radially toward the mold walls. This action flattens the thermal gradient across the billet head.<\/p>\n

Without a high-quality distribution plate, the center of the billet often remains too hot while the edges cool too quickly. This thermal stress leads to cracks. Adtech plates ensure the temperature remains consistent from the center to the periphery. This balance is vital for alloys like the 7000 series which are sensitive to thermal shock.<\/p>\n

Material Science: Why Calcium Silicate?<\/h2>\n

We manufacture Adtech Distribution Plates using distinct high-density fiber-reinforced calcium silicate. This material choice is deliberate. It offers specific advantages over traditional refractory materials or lower-grade ceramics.<\/p>\n

Thermal Properties and Non-Wetting Behavior<\/h3>\n

Calcium silicate possesses low thermal conductivity. This property preserves the heat of the molten aluminum. It prevents the metal from freezing prematurely as it passes through the distribution holes. Furthermore, the material is non-wetting to aluminum. The molten metal does not stick to the surface of the plate. This characteristic makes cleaning easier and extends the operational life of the part.<\/p>\n

The density of our material is engineered to withstand the erosion caused by high-velocity flow. Low-density plates often degrade, releasing particles into the melt. These particles become inclusions in the billet. Adtech plates maintain their structural integrity throughout the casting campaign.<\/p>\n

Comparison of Material Grades<\/h3>\n

Adtech provides different grades suited for specific casting requirements.<\/p>\n

Table 1: Adtech Material Specifications<\/b><\/p>\n\n\n\n\n\n\n\n\n\n
Feature<\/strong><\/td>\nAdtech N17 Grade<\/strong><\/td>\nAdtech N100 Grade<\/strong><\/td>\nStandard Refractory<\/strong><\/td>\n<\/tr>\n<\/thead>\n
Density (g\/cm\u00b3)<\/b><\/span><\/td>\n0.85<\/span><\/td>\n1.0<\/span><\/td>\n0.65<\/span><\/td>\n<\/tr>\n
Max Service Temp<\/b><\/span><\/td>\n800\u00b0C<\/span><\/td>\n1000\u00b0C<\/span><\/td>\n700\u00b0C<\/span><\/td>\n<\/tr>\n
Thermal Shock Resistance<\/b><\/span><\/td>\nHigh<\/span><\/td>\nExcellent<\/span><\/td>\nModerate<\/span><\/td>\n<\/tr>\n
Aluminum Wettability<\/b><\/span><\/td>\nNo<\/span><\/td>\nNo<\/span><\/td>\nPartial<\/span><\/td>\n<\/tr>\n
Primary Application<\/b><\/span><\/td>\nStandard Billets<\/span><\/td>\nHard Alloys \/ Aerospace<\/span><\/td>\nGeneral Casting<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Adtech plates function as a critical component of the hot top casting system<\/b>. They work in conjunction with thimbles<\/b>, transition plates<\/b>, and adapter rings<\/b>. By optimizing the geometry of the distribution plate, cast houses can influence the sump depth<\/b>. A shallower sump generally results in a better surface finish and more uniform grain structure. Our engineering team customizes the hole pattern to match the specific diameter of the mold and the alloy being cast.<\/p>\n

Reducing Solidification Defects<\/h3>\n

A major issue in aluminum foundries is the formation of “cold shuts” or surface laps. These occur when the meniscus of the aluminum freezes against the mold wall before new metal arrives. The design of the Adtech Distribution Plate directs fresh, hot metal toward the mold wall. This action keeps the meniscus active and prevents surface defects. It is a direct correlation between plate design and surface quality.<\/p>\n

Detailed Technical Specifications and Customization<\/h2>\n

One size does not fit all in aluminum casting. Adtech offers customization services. We machine plates to precise tolerances based on client drawings.<\/p>\n

Dimensions and Tolerances<\/h3>\n

The flatness of the plate is critical. If a plate is warped, it will not seal correctly against the transition plate or the hot top. This leads to metal leakage. Adtech guarantees flatness tolerances within +\/- 0.1mm.<\/p>\n

We can produce plates for billet diameters ranging from 3 inches to 14 inches and beyond. The thickness of the plate is typically determined by the thermal load it must bear. Thicker plates are used for larger diameters to prevent mechanical failure under the weight of the metal.<\/p>\n

Table 2: Common Defect Solutions via Adtech Plates<\/b><\/p>\n\n\n\n\n\n\n\n\n
Defect Type<\/strong><\/td>\nCause Related to Flow<\/strong><\/td>\nAdtech Solution<\/strong><\/td>\n<\/tr>\n<\/thead>\n
Center Cracks<\/b><\/span><\/td>\nuneven cooling \/ deep sump<\/span><\/td>\nOptimized hole pattern to flatten temperature gradient<\/span><\/td>\n<\/tr>\n
Oxide Inclusions<\/b><\/span><\/td>\nTurbulent entry flow<\/span><\/td>\nLaminar flow design reduces surface agitation<\/span><\/td>\n<\/tr>\n
Cold Shuts<\/b><\/span><\/td>\nLow temperature at mold wall<\/span><\/td>\nRadial flow directs hot metal to periphery<\/span><\/td>\n<\/tr>\n
Uneven Grain Size<\/b><\/span><\/td>\nVariable solidification rate<\/span><\/td>\nConsistent thermal distribution ensures uniform grain<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Installation and Operational Best Practices<\/h2>\n

Proper use of the distribution plate determines its lifespan and performance. Even the best product will fail if installed incorrectly.<\/p>\n

Pre-Heating Procedures<\/h3>\n

Calcium silicate is hygroscopic. It can absorb moisture from the air during storage. If a cold, damp plate contacts molten aluminum at 700\u00b0C, the moisture turns to steam instantly. This can cause the plate to crack or explode.<\/p>\n

Step-by-Step Pre-Heating:<\/b><\/p>\n

    \n
  1. \n

    Store plates in a dry environment.<\/p>\n<\/li>\n

  2. \n

    Before installation, inspect the plate for shipping damage.<\/p>\n<\/li>\n

  3. \n

    Pre-heat the plate to approximately 200\u00b0C to 300\u00b0C. This drives off any residual moisture.<\/p>\n<\/li>\n

  4. \n

    Ensure the plate reaches a temperature close to the casting temperature before the start of the cast. This reduces thermal shock.<\/p>\n<\/li>\n<\/ol>\n

    Coating Application<\/h3>\n

    While Adtech plates are non-wetting, applying a thin layer of Boron Nitride (BN) coating provides additional protection. This acts as a release agent. It makes the removal of the solidified “butt” easier at the end of the cast. The coating should be applied evenly and allowed to dry completely before use.<\/p>\n

    Case Study 2023<\/h2>\n

    Evidence of performance is essential for technical buyers. The following case illustrates the tangible benefits of switching to Adtech.<\/p>\n

    Project: Yield Improvement for 6063 Alloy Billets<\/p>\n

    Location: Aluminum Extrusion Supplier, Bahrain<\/p>\n

    Time: April 2023 \u2013 October 2023<\/p>\n

    The Challenge:<\/p>\n

    A prominent aluminum plant in Bahrain faced issues with their 8-inch billet production. They experienced a high rejection rate due to oxide inclusions and coarse grain structures at the billet center. Their existing distribution plates, sourced from a generic supplier, eroded quickly. This erosion altered the flow dynamics mid-cast.<\/p>\n

    The Adtech Solution:<\/p>\n

    Our technical team analyzed their casting parameters. We recommended the Adtech N17 High-Density Distribution Plate. We also modified the nozzle aperture size to reduce the velocity of the metal entering the mold.<\/p>\n

    Implementation:<\/p>\n

    The plant installed the N17 plates on one casting pit while maintaining the old plates on a second pit for comparison. The trial ran for six months.<\/p>\n

    The Results:<\/b><\/p>\n

      \n
    1. \n

      Inclusion Reduction:<\/b> The scrap rate due to inclusions dropped by 18% in the pit using Adtech plates.<\/p>\n<\/li>\n

    2. \n

      Lifespan Extension:<\/b> The generic plates required replacement every 80 casts. Adtech plates lasted for an average of 140 casts.<\/p>\n<\/li>\n

    3. \n

      Cost Savings:<\/b> Despite the slightly higher unit cost of the Adtech plate, the reduction in scrap and the extended lifespan resulted in a net saving of $45,000 over the six-month period for that single pit.<\/p>\n<\/li>\n<\/ol>\n

      This case confirms that superior material density and precise engineering directly translate to profitability for cast houses.<\/p>\n

      The Connection Between Distribution Plates and Downstream Processing<\/h2>\n

      The quality of the billet produced in the cast house dictates the efficiency of the extrusion press. If a billet has a non-uniform grain structure, the extrusion speed must be reduced. This slows down the entire factory.<\/p>\n

      Adtech Distribution Plates enable faster extrusion speeds. By ensuring a homogenous billet structure, the extrusion press can operate at higher pressures without tearing the metal. This is a holistic view of production. Investing in the right consumable at the casting stage pays dividends at the extrusion stage.<\/p>\n

      Integration with Molten Metal Filtration<\/h3>\n

      Distribution plates are the final step. However, they work best when the metal is already clean. Adtech recommends pairing these plates with our Ceramic Foam Filters (CFF). The CFF removes the bulk of the inclusions before the metal reaches the distribution plate. The plate then handles the flow control. This dual-approach guarantees aerospace-grade quality.<\/p>\n

      Advanced Troubleshooting Guide<\/h2>\n

      Operators often blame the metal or the mold when the issue lies with the distribution mechanism.<\/p>\n

      Scenario 1: Metal Leakage around the Plate<\/p>\n

      This usually indicates a flatness issue or debris between the plate and the seat. Ensure the seating area is perfectly clean. Check the Adtech plate on a surface plate to verify flatness.<\/p>\n

      Scenario 2: Rapid Erosion of Holes<\/p>\n

      If the holes enlarge quickly, the metal velocity might be too high. Alternatively, the metal temperature might be exceeding the rating of the plate. Switch to Adtech N100 grade for higher temperature resistance.<\/p>\n

      Scenario 3: Cracking on First Use<\/p>\n

      This is almost always a pre-heating failure. The thermal shock of liquid aluminum hitting a cold ceramic plate creates immense stress. Review the pre-heating protocol immediately.<\/p>\n

      Comparative Analysis: Adtech vs. Global Competitors<\/h2>\n

      The market contains various options. Why choose Adtech?<\/p>\n

      Table 3: Competitive Analysis<\/b><\/p>\n\n\n\n\n\n\n\n\n
      Metric<\/strong><\/td>\nAdtech<\/strong><\/td>\nCompetitor A (Low Cost)<\/strong><\/td>\nCompetitor B (Premium)<\/strong><\/td>\n<\/tr>\n<\/thead>\n
      Material Integrity<\/b><\/span><\/td>\nHigh Density Fiber Reinforced<\/span><\/td>\nStandard Calcium Silicate<\/span><\/td>\nFused Silica<\/span><\/td>\n<\/tr>\n
      Customization Speed<\/b><\/span><\/td>\n7-10 Days<\/span><\/td>\nFixed Sizes Only<\/span><\/td>\n4-6 Weeks<\/span><\/td>\n<\/tr>\n
      Technical Support<\/b><\/span><\/td>\n24\/7 Engineering Access<\/span><\/td>\nNone<\/span><\/td>\nBusiness Hours Only<\/span><\/td>\n<\/tr>\n
      Price to Value<\/b><\/span><\/td>\nOptimal<\/span><\/td>\nLow Cost \/ Low Life<\/span><\/td>\nHigh Cost<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Adtech balances performance with cost. We do not sell the cheapest plate on the market because cheap plates fail. We sell the most cost-effective plate when calculated on a “cost per ton of cast aluminum” basis.<\/p>\n