Spiral Crusher
JOEST Spiral Crushers are highly compact, multifunctional units designed for foundries using cold-resin bonded moulding sand. They offer a unique combination of shakeout, crushing, screening, and vertical conveying in a single machine. Thanks to their innovative design, Spiral Crushers combine several essential steps of the sand reclamation process – from shakeout of the moulding box and effective lump reduction to the conveying of reclaimed sand.
Their strengths are particularly evident in space-constrained plant layouts: the vertical spiral path enables fine sand to be conveyed upwards within a minimal footprint – for example, directly to a sand cooler or magnetic separator.
FUNcTION
Thanks to its robust design, FEM-verified fatigue strength, and cooled drives, the Spiral Crusher is particularly well suited for demanding sand reclamation applications. Throughput rates of up to 10 t/h with grate surfaces up to 2,800 × 2,800 mm highlight the machine’s performance capabilities. Positioned upstream of a magnetic separator or sand cooler, the unit supports both the reuse of moulding sand and process optimization in foundry operations.
The Spiral Crusher performs four essential functions within a foundry line:
Shakeout of the moulding box via an integrated grate system
Crushing of the resulting sand lumps on a rotating friction grate within the crusher pot
Screening of oversize particles using an interchangeable screen mesh within the spiral shaft; oversized material is automatically recirculated into the crusher
Vertical conveying of fine sand via a spiral-shaped lifting path – for example, to a sand cooler or magnetic drum
The lump reduction is achieved by the circular movement on the friction grate. Oversized particles are reliably separated, while fine sand is continuously discharged. Maintenance-friendly features such as a removable grate plate and controlled discharge openings ensure easy cleaning and maintenance of the machine.
Technical data
Maximum grate surface: up to 2,800 × 2,800 mm
Throughput capacity: up to 10 t/h (material-dependent)
Crushing unit: friction grate floor with rotating circular motion
Conveying path: spiral-shaped vertical shaft
Screen mesh: interchangeable, with automatic oversize recirculation
Drive system: vibration-capable, cooled flange motors
Machine body: FEM-calculated, vibration-optimized design
Oversize separation: integrated into the spiral shaft, returns to crusher
Discharge openings: controlled, at grate and pot bottom
Maintenance: removable grate segments, service-friendly design
Installation orientation: vertical design, ideal for compact plant layouts
Typical positioning: between shakeout station and sand cooler or magnetic separator
Product details & Options
- Combined unit for shakeout, crushing, screening, and conveying
- Friction grate floor for lump crushing
- Crusher pot with robust, FEM-calculated machine body
- Spiral shaft for vertical conveying
- Oversize screening section with automatic recirculation
- Cooled drives in the flange area
- Removable grate segments for maintenance
- Discharge openings at friction grate and pot bottom
- Compact installation dimensions – ideal for tight spaces
- Interchangeable screen meshes for various particle size requirements
- Sensors for process monitoring and operational data acquisition
- Optional sound insulation to reduce operating noise
- Prepared for automated foreign object separation
- Custom coating or surface treatment tailored to the application environment
- Design with additional maintenance and inspection hatches
- Integration into existing control and conveyor systems
- Extended drive options for special operating conditions
- Additional wear protection in the crusher zone for abrasive materials
Fields of Application
The JOEST Spiral Crusher is used wherever cold-resin bonded sand moulds need to be efficiently seperated, crushed, and returned to the production process – especially in space-constrained environments and applications with high throughput and integration requirements.
Equipment Options
Wear protection packages
Additional armoring and wear-resistant linings in the crusher area for abrasive moulding materials
Interchangeable screen inserts
Various mesh sizes to adapt to different particle size requirements
Oversize recirculation system
Intelligent return of oversized particles for re-crushing
Cooled drive variants
For operation under thermally extreme conditions, especially in continuous duty
Sensor integration
Equipped with temperature, fill level, or vibration sensors for process monitoring and maintenance planning
Additional inspection openings
For even easier access during maintenance and inspection work
Integration into higher-level control systems
Enables full integration into automated production lines
Dust extraction interfaces
Provisions for connection to central extraction systems
Customer-specific coatings and finishes
Tailored to the application environment, e.g., for corrosive or high-temperature atmospheres
Sound insulation packages
For noise reduction in sound-sensitive production areas