Distribution Plate, Launder, Hot Cap

Category: Hot Top Products

Distribution Plate, Launder, Hot Cap

Distribution Plate, Launder, and Hot Cap are essential refractory components in aluminum casting systems, designed to control molten metal distribution, transport, and entry into the mold. They play a critical role in ensuring uniform metal flow, reducing turbulence, and maintaining high aluminum cleanliness throughout the casting process.

Installed in hot-top systems, launder channels, and mold inlets, these components guide molten aluminum efficiently from the furnace to the casting area. Their precise design reduces oxidation and inclusion formation, contributing to better casting quality and improved downstream processing.

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Key Features

Excellent non-wetting property with smooth glazed surface
No delamination, peeling, or spalling; prevents contamination of molten aluminum
Scour-resistant with strong thermal shock resistance
Enhanced performance when used with BN coating, achieving 450–800 casting cycles (excluding hot-top caps)
Customizable sizes for specific casting diameters and alloy types
Compatible with ordinary and advanced hot-top, vacuum, and oil-air slide casting systems

Product Advantages

Superior Non-Wetting & Smooth Surface
The glazed surface ensures molten aluminum flows evenly, reducing adhesion and contamination while maintaining optimal thermal transfer.

Durable & Scour-Resistant
Constructed from high-quality alumina-silica or fused silica materials, these components resist delamination, spalling, and mechanical erosion, ensuring a long service life and stable operation.

Optimized with BN Coating
When used with boron nitride (BN) coating, performance is enhanced, extending the normal service life to 450–800 casting cycles for most components (excluding hot-top caps).

Energy-Efficient & Process-Stable
Uniform distribution and smooth transport of molten aluminum reduce turbulence, improve mold filling, and minimize energy losses during casting.

Distribution Plate, Launder, and Hot Cap are widely applied in aluminum casting systems requiring controlled molten metal flow and high-quality casting performance.

Typical Applications

Ordinary hot-top casting equipment
Oil-air slide casting equipment
Vacuum negative pressure casting equipment
High-purity aluminum alloy casting
Continuous casting of billets, ingots, and cast-rolled coils

Main Functions

Uniform distribution of molten aluminum into molds
Smooth transfer and guidance along launder channels
Reduction of turbulence, oxidation, and inclusion formation
Enhanced surface quality and consistency of final castings

Selection depends on casting method, alloy type, mold diameter, and operational conditions.

1. Material Selection

Alumina-Silica – Suitable for standard hot-top equipment
High Fused Silica 1.4 – Optimal for oil-air slide and vacuum negative pressure casting
High Fused Silica 1.9 – Recommended for high-demand vacuum and slide casting applications

2. Size Selection

Component size should match the mold diameter or casting system specification for optimal flow performance. Standard diameters available:

3in, 3.5in, 4.5in, 5in, 5.5in, 6in, 6.5in, 7in, 8in, 9in, 10in, 12in, 14in, 16in, 18in, 20in

Custom sizes can be produced according to alloy diameter or specific user requirements.

Installation Recommendations

Ensure proper alignment in the hot-top or launder system
Inspect surfaces for cracks or damage before installation
Apply BN coating for enhanced durability and extended service life
Replace worn components promptly to maintain casting stability

Material Selection

Name of the Material	Application Scope
Alumina-Silica	Ordinary hot-top casting equipment
1.4 High Fused Silica 1.4	Oil-air slide casting and vacuum negative pressure casting equipment
High Fused Silica 1.9	Oil-air slide casting and vacuum negative pressure casting equipment

Distribution Plate, Launder, and Hot Cap are part of an integrated aluminum casting system, working together with other refractory and flow control components to ensure high-quality casting.

Compatible Systems

Hot-Top Casting System – Provides uniform molten metal entry and improved billet surface quality
Launder Channels – Smoothly transport molten aluminum from furnace to mold
Degassing Units – Remove hydrogen and impurities before distribution
Flow Control Components – Maintain stable aluminum flow through molds
Ceramic Foam Filters (CFF) – Additional filtration for oxide films and non-metallic inclusions

These components can be customized and combined according to alloy type, mold diameter, and production requirements to achieve optimal casting performance.