Feeding: Compacted spent sand enters the machine chamber via the top inlet.

Aeration & Crushing: Two rollers equipped with high-strength wear-resistant tooth plates rotate towards each other at low speed. Sand lumps are progressively torn and broken apart by shear and compression forces, forming a loose, permeable sand flow.

Discharge: Loosened sand is evenly discharged through the bottom outlet into downstream conveyors or cooling equipment.

Overload Protection: Equipped with hydraulic or mechanical safety coupling—if foreign objects (e.g., casting scraps, bolts) enter, the rollers automatically stop or slip, protecting the drive system.

High-Efficiency Aeration, Restores Sand Properties
Differential speed design enhances shearing effect, breaking compacted lumps into ≤50 mm particles—significantly improving sand flowability and permeability, preparing for cooling and reclamation.

Wear-Resistant & Durable
Roller teeth made of high-chrome cast iron (Cr26–Cr28) or alloy steel with overlay welding, surface hardness HRC≥58—excellent wear resistance. Roller shafts are quenched and tempered for high strength, service life up to 12,000–15,000 hours.

Compact Structure, Stable Operation
Welded steel frame with high rigidity. Drive system uses hardened gear reducer + gear coupling—high efficiency, low vibration, low noise (≤80 dB(A)).

Easy Maintenance & Inspection
Equipped with side access doors or top inspection hatches for quick tooth replacement or chamber cleaning. Some models feature hydraulic lifting rollers for major maintenance.

Intelligent Control, Safe & Reliable
Optional PLC control + current monitoring—real-time motor load tracking, automatic alarm and shutdown on overload, supports remote start/stop and fault diagnosis.

High Adaptability, Flexible Configuration
Customizable roller diameter (Φ400–Φ800 mm), length (800–2000 mm), and motor power (7.5–30 kW) based on sand temperature (ambient/high-temp), capacity, and installation space.

Clay Sand Lines: Loosening spent sand after shakeout, preventing elevator blockage

Resin Sand Reclamation: Breaking lumps to improve reclamation efficiency

Pre-cooling Treatment: Enhances cooling tower heat transfer, reduces drift loss

Sand Bin Outlet Aeration: Prevents bridging, ensures smooth discharge

Spent Sand Reuse System: Restores flowability for uniform mixing

Qingdao Dingli Machinery Co., Ltd. is a company specializing in the production of casting machinery equipment. It mainly manufactures equipment for casting clay sand, resin sand, coated sand, wet sand drying, lost foam casting, sodium silicate sand, etc. It can undertake various turnkey projects, including the design, manufacturing, installation and commissioning of mechanical sand processing. Our factory has strong technical strength and advanced processing equipment. We have long-term and close technical cooperation with many senior experts and scholars from domestic universities and research institutions. We can provide users with high-performance, reliable products and satisfactory services.
Our company adheres to the principles of promoting enterprise development through technology, prioritizing quality, continuous improvement and customer satisfaction. We are willing to sincerely cooperate with friends from all walks of life to achieve common prosperity.
Our company mainly undertakes the following projects:
20-180t/h mechanized clay sand processing production line and single machine equipment turnkey project.
Annual production of 1000 to 20,000 tons of consolidated resin sand casting mechanized production line and single machine equipment turnkey project.
Annual production of 3,000 to 10,000 tons of hot processing coated sand complete equipment and single machine equipment turnkey project.
Annual production of 3,000 to 7,000 tons of hot coating sand regeneration complete equipment and single machine equipment turnkey project.
5-15t/h sodium silicate mechanical production line and single machine equipment turnkey project.
5-30t/h three-stage sand drying equipment and single machine equipment turnkey project.
5-40t/h lost foam casting complete equipment and single machine equipment turnkey project and other types of shot blasting cleaning equipment, lifting equipment, conveying equipment, cooling equipment, magnetic separation equipment, environmental protection dust removal equipment.
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