Core Sand Mixers
Core Mixer: Homogeneous Mix and High Efficiency for Foundries
The Core Mixer is an industrial mixing solution designed for the homogeneous and repeatable mixing of core sand and binders in foundries. Strong Makine‘s manufacturing philosophy combines consistent mix quality, low binder consumption, and short cycle times in the same machine. Thanks to its high-capacity hopper, wear-resistant body, and optimized mixer geometry, it achieves stable results in resin-bonded sand, furan, cold-box, or sodium silicate-based systems. The fully automatic control system, with recipe management and precise dosing, reduces operator dependency and minimizes errors.
The machine ensures rapid and homogeneous distribution by automatically adjusting mixing times and speeds according to the recipe. In processes sensitive to variables like moisture, temperature, and viscosity, optional sensors and closed-loop control help maintain the same quality in every batch. Wide service doors, replaceable liners, and well-positioned access points are standard for easy cleaning and maintenance. Dust emission is controlled with filtration, and safety interlocks and an emergency stop system comply with CE requirements.
Application areas include foundries and core production lines; it integrates seamlessly into core preparation processes in the automotive, agriculture, defense, machinery, and heavy industries. The Core Mixer provides the necessary foundation for complete mold cavity filling and surface uniformity through the correct binder ratio and a homogeneous aggregate. This increases core strength and reduces scrap rates and the need for rework. Strong Makine offers different capacities, mixer geometries, coating, and automation options based on need, providing a complete solution package that lowers the total cost of ownership, including commissioning and training.
Operating Principle and Process Control
The Core Mixer uses high-torque mixing arms and optimized blade geometry to quickly homogenize the selected aggregate size distribution with the binder and catalyst. The recipe management module stores binder quantity, catalyst ratio, mixing time, and speed information. The operator starts a batch with a single touch; the system automatically doses, mixes, and discharges. At the end of the process, batch number, date-time, operator, and consumption data are recorded for traceability.
Technical Specifications and Options
- Capacity Options: Various hopper volumes, from small-batch production to high-volume lines.
- Fully Automatic Control: PLC/HMI, recipe memory, user authorization.
- Dosing: Flowmeter or weighing-based precise binder/catalyst feeding.
- Material Quality: Wear-resistant liners, replaceable mixer blades.
- Discharge: Fast flap door or screw conveyor option, compatible with conveyor/core lines.
- Integration: MES/SCADA connection, remote monitoring, and data transfer.
- Safety and Filtration: Dust collection unit, cover interlocks, emergency stop.
- Optionally, moisture and temperature sensors, resin viscosity compensation, an in-batch sample port, and a torque trend monitoring package to verify mix uniformity can be added.
Quality and Homogeneity
A homogeneous mix is critical for core strength and surface quality. The Core Mixer features a flow pattern that ensures equal contact between the aggregate and the binder at all points. The mixing time, speed, and blade angle are determined based on the sand grain size and binder type. Optional torque curve and energy consumption graphs are used as indicators of homogeneity within the batch. This prevents “excess binder” consumption and reduces gas defects and surface imperfections.
Cleaning, Maintenance, and Operating Cost
Wide service doors, quick-release blades, and a smooth internal geometry shorten cleaning time during batch transitions. Liners and blade materials offer high abrasion resistance, extending planned maintenance intervals. Standardized spare parts and remote diagnostics minimize downtime. The Total Cost of Ownership (TCO) is reduced through low binder consumption, short cycles, and decreased rework.
Application Scenarios
- Furan and Cold-Box: Repeatable dosing and time control for fast-curing systems.
- Sodium Silicate/CO₂: Stable moisture and optimum mixing times for water-based binders.
- Special Mixes: Recipes focused on high flowability for thin-section cores or high strength for large cores.
Integration and Line Efficiency
The Core Mixer works in synchronization with existing core boxes, workshop conveyors, and curing/hardening stations. Batch data is transferred to production reports; KPIs such as cycle time, consumption, and scrap rate are monitored. This visibility enables data-driven action for recipe improvements and inventory planning.
Safety and Compliance
The machine comes with a safety relay compliant with CE directives, protective covers, and filtration solutions for dust emission. Noise and vibration levels are designed with limit values in mind. User manuals and maintenance plans are included in the delivery package.
The Strong Makine Core Mixer enhances quality and reduces costs in foundry processes with its homogeneous mixing, low binder consumption, and short cycle times. Its combination of durable construction, automation, and easy maintenance enables stable, repeatable core production in diverse sectors, from automotive to heavy industry. A single platform offers a scalable solution for numerous recipes and capacities.
Core Mixer Technical Specifications
| TYPE | CAPACITY (Kg) | Kg/h | rpm | Motor Power (Hp) |
|---|---|---|---|---|
| M-50 | 60 | 360 | 60 | 3 |
| M-80 | 200 | 1200 | 45 | 5,5 |
| M-110 | 350 | 2100 | 30 | 10 |
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