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The M Series Shell Sand Mixer is a high-efficiency, intelligent mixing machine specifically designed for the hot-process shell sand production. It is widely used in core making for precision castings such as automotive components, engine blocks, hydraulic valves, pump housings, and pipe fittings. Featuring high-speed dual-rotor agitation + oil-bath/electric heating + automated control, it enables rapid, uniform, and controllable mixing of sand, resin, and hardener, ensuring a complete, dense resin coating on sand grains—significantly improving core strength, dimensional accuracy, and surface finish to meet high-quality shell sand production requirements.
Available in models M-300, M-500, M-800, M-1000, the M Series offers batch capacities from 30 kg to 1000 kg. It supports manual, semi-automatic, and fully automatic operation modes and can be seamlessly integrated with sand heaters, cooling/crushing systems, and conveyors to form a complete shell sand production line.
Working Principle
The M Series uses a three-stage mixing process: "hot sand + resin + cold hardener", ensuring resin fully coats hot sand and hardener is added precisely after cooling to prevent premature curing:
Heating & Pre-Mixing Pre-dried sand is heated to 120–140°C and fed into the mixer. Dual rotors spin at 150–300 rpm, rapidly tumbling sand for uniform temperature.
Resin Addition & Coating When sand reaches target temperature, the PLC-controlled resin dosing pump sprays liquid phenolic resin evenly into the sand stream. The resin melts and coats the sand grains, forming an initial film.
Cooling & Hardener Addition After resin coating, mixing continues to cool sand to 90–100°C. The PLC triggers the hardener (hexamine solution) dosing system to add hardener precisely, initiating cross-linking.
Final Mixing & Discharge After 1–2 minutes of final mixing, the sand reaches optimal flowability and formability. The pneumatic/hydraulic discharge door opens automatically, releasing shell sand to a cooling conveyor or directly to core-making.
Key Features
Uniform Mixing, Stable Quality Symmetrical dual-rotor with helical blades combines forced shearing and tumbling—mixing uniformity ≥98%, ensuring full coating on every sand grain.
Precise Temperature Control, Process Flexibility Multi-point thermocouples + PID control monitor sand temperature in real-time, accuracy ≤±3°C. Supports multi-stage temperature profiles for different resin systems.
High Automation Full-auto mode controls the entire process: sand feeding → heating → resin addition → cooling → hardener addition → mixing → discharge, minimizing human error and improving consistency.
Robust & Wear-Resistant Mixing chamber and rotor blades made of wear-resistant alloy steel (ZGMn13) or overlay welding, impact- and wear-resistant, long service life. Reliable shaft sealing prevents resin leakage.
User-Friendly, Easy Maintenance 10" HMI touchscreen for intuitive parameter setting and self-diagnosis. Top quick-opening cover for easy cleaning. Centralized lubrication points for simple maintenance.
Main Technical Specifications
Parameter
Specification
Model Series
M-300 / M-500 / M-800 / M-1000
Batch Capacity
30–100 kg (shell sand)
Mixing Time
6–12 minutes
Rotor Speed
VFD adjustable
Heating Method
Thermal oil / Electric
Max. Temp.
180℃
Temperature Accuracy
≤ ±3℃
Resin Dosing
Precision dosing pump (adjustable)
Hardener Dosing
Time/Flow control
Control System
PLC + 10" HMI + Optional Remote Monitoring
Motor Power
Depending on model
Weight
1,200 ~ 4,500 kg
Dimensions
Customized by model
Typical Applications
Shell core production for automotive engine blocks, heads, intake manifolds
Precision core making for hydraulic valves, pumps, and fittings
High-precision thin-wall cores for aerospace and defense
Mixing unit for shell sand reclamation systems
Small-scale mixers for lab or pilot production (M-300/M-500)
Company Profile
Qingdao Dingli Machinery Co., Ltd.
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. Welcome to contact us~
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Year Established:
2013
Ecer Certification：
Verified Supplier
Qingdao dingli machinery Co., Ltd is located in the famous coastal city, the hometown of casting machine - Qingdao, since its establishment, we are always adhering to the traditional industries with the aim of combined closely with the foreign advanced technology, through the introduction, cooperati... Qingdao dingli machinery Co., Ltd is located in the famous coastal city, the hometown of casting machine - Qingdao, since its establishment, we are always adhering to the traditional industries with the aim of combined closely with the foreign advanced technology, through the introduction, cooperati...
