S89 Water-Cooled Boiling Cooling Bed for Rapid Cooling of Old Sand of Furan Resin Sand and Phenolic Resin Sand in Sand Casting

Water-cooled boiling cooling bed is the most widely used sand cooling equipment in investment casting and disappearing mold casting. Dense cooling water pipe can quickly complete the heat exchange, although the structure is complex, high energy consumption, strict requirements on the particle size of the sand, but the cooling effect is good, to meet the requirements of the casting process.
In the field of precision casting (investment casting, lost foam casting, etc.), the cooling efficiency and temperature uniformity of the molding sand directly determine the surface quality and dimensional accuracy of the casting. The water-cooled boiling cooling bed has become the core equipment of the high-precision casting sand processing system due to its unique heat exchange structure and precise temperature control capability. This article will deeply analyze how this equipment can win market favor with its excellent cooling performance under the challenges of complex structure and high energy consumption from the dimensions of thermodynamic optimization, precision casting adaptability, energy efficiency upgrade path and industry application.


1. Technical principles and adaptability to precision casting
For the process characteristics of investment casting (sand particle size AFS 50-100) and lost foam casting (EPS bead particle size 0.3-0.8mm), the water-cooled boiling cooling bed achieves a technological breakthrough through boiling heat exchange and gradient cooling:
Multi-layer water-cooled pipe array design:
Densely arranged stainless steel cooling pipes (Φ25×2mm, spacing 40mm), internal circulating cooling water (flow rate 5-15m³/h), pipe wall thermal conductivity of 16W/(m·K), 60% higher than ordinary carbon steel pipe heat exchange efficiency.
The pipe array is stacked at an angle of 15°, and the sand flow forms a vortex motion under the action of gravity (flow rate 0.3-0.8m/s), the contact area between sand particles and cooling pipes increases by 3 times, and the cooling efficiency reaches 1.5-4.0t/(h·m³).
Precise adaptation of sand particle size:
The fluidized bed is equipped with an adjustable grid (aperture Φ3-Φ8mm) to ensure that only qualified sand particles (AFS 50-120) enter the cooling zone, and over-coarse or over-fine sand particles are automatically diverted to the regeneration system, and the sand temperature uniformity (±3ºC) compliance rate is >98%.
For EPS beads cast in lost foam, an electrostatic separation module (voltage 30kV) is added to separate residual foam particles (removal rate >95%) to avoid clogging of the cooling pipe.


2. Core advantages and process value
Despite the challenges of complex structure and high energy consumption, the equipment shows unique value through process adaptability optimization and full life cycle cost control:
Industry-leading cooling efficiency:
Save 35% energy compared to traditional vibrating cooling beds (energy consumption per ton of sand ≤18kW·h), and save 80% water compared to pneumatic cooling systems;
The moisture content of the sand particles is stable at 2.0-2.5%, which is 50% higher than the uniformity of natural cooling, and the shrinkage defect rate of castings is reduced to below 0.3%.
High temperature resistant and long-lasting design:
The cooling tube is made of Incoloy 825 nickel-based alloy (temperature resistant to 1200ºC), and the surface is plasma sprayed with Al2O3 coating (thickness 50μm), with a service life of >8 years;
The modular tube array structure supports single tube replacement, maintenance time <30 minutes, and annual maintenance cost is reduced by 45%.


Environmental compliance:
The closed box (leakage rate <3mg/m³) and wet dust collector (air volume 6000m³/h) work together, and the dust emission concentration is <5mg/m³;
Cooling water circulation system (wastewater reuse rate >95%)