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Coated Sand Mixing Equipment for High-Precision Molding

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Qingdao Dingli Machinery Co., Ltd.

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Coated Sand Mixing Equipment for High-Precision Molding

Model NO. : M500

Control Type : PLC

Customized : Customized

Condition : New

Automatic Grade : Automatic

Certification : CE, RoHS, GS, ISO9001

Type : Sand Casting

Sand Type : Phenolic Resin-Coated Sand (Hot-Box)

Heating Method : Thermal Oil Heating (180-220°C)

Rotor Speed : Rotor Speed

Communication : Modbus RTU / Profinet

Transport Package : Export Packaging

Specification : Customizable

Trademark : DL

Origin : China

HS Code : 8474802000

Production Capacity : 100

MOQ : 1 Piece

Price : US $10,000-500,000

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Product Description

Product Description of M Series Shell Sand Coating & Mixing Machine

The M Series Shell Sand Coating & Mixing Machine is a high-efficiency heating mixer designed specifically for the hot-box shell sand coating process, suitable for the preheating, mixing, and discharge of phenolic resin-coated sand. Widely used in shell mold/core production for engine manifolds, turbo housings, precision valves, and fittings, the M Series features a thermal oil-heated jacket + high-speed rotor + precise temperature control to uniformly preheat sand (140–160°C) and rapidly melt and coat resin—ensuring a complete, dense resin film on each grain, enhancing shell strength, surface finish, and collapsibility.

Available in batch and continuous models, the M Series handles 100–1500 kg per batch, and can operate standalone or integrate with sand heaters, cooling screens, automatic feeders, and robot core extractors—forming a fully automated shell sand line that meets demands for consistent quality, high throughput, low energy, and minimal resin usage.

Working Principle

Sand Preheating
Dry base sand (silica or chromite) enters the heating mixing chamber via elevator or pneumatic conveyor. Thermal oil (180–220°C) circulates through the jacket, uniformly heating the sand to 140–160°C—ensuring consistent grain temperature without hot spots or caking.

Resin Addition & High-Speed Mixing
Once target temperature is reached, phenolic resin powder is fed via a screw metering feeder, while additives (e.g., stearic acid, hexamine) are injected. The high-speed rotor (150–300 rpm) rapidly melts and coats the resin—achieving uniform coverage in 60–120 seconds, producing free-flowing coated sand.

Rapid Cooling & Discharge
After mixing, the coated sand is rapidly discharged via pneumatic/electric valve to a cooling screen or buffer hopper to prevent premature curing. Some models feature integrated cooling ducts for direct air cooling.

Fully automated via PLC + HMI, with temperature profiling, recipe storage, data logging, fault alarms. Optional spray-cleaning system prevents resin buildup and extends service life.

Coated Sand Mixing Equipment for High-Precision Molding

Key Features

Thermal Oil Heating, Uniform & Precise Temperature
Jacketed heating ensures sand temperature accuracy ±2°C, avoiding localized overheating and resin charring—ensuring consistent coating quality.

High-Speed Rotor, High Coating Efficiency
Rotor tip speed 20–28 m/s, mixing uniformity ≥98%, resin consumption reduced by 10–15% vs. conventional mixers—lowering production costs.

Smart Temperature Control, Repeatable Process
Multi-stage temperature profiling for preheating, holding, mixing
Infrared pyrometer monitors sand temp in real-time, auto-adjusts power
Recipe storage & recall ensures process consistency across sand types

Robust Structure, Wear-Resistant
Mixing chamber, rotor, and liners made of wear-resistant alloy (NM400) or ceramic coating—critical parts last ≥6,000 hours; overall lifespan ≥10 years.

Automated Integration, Easy Operation
PLC + color HMI, remote monitoring, MES integration
Optional automatic feeder, cooling interlock, robot interface
Batch counting, output tracking, energy analysis supported

Easy Maintenance, Minimal Downtime
Top quick-opening cover for cleaning and liner replacement
Optional pull-out rotor design—replaced within 2 hours
Modular structure with high part commonality

Main Technical Specifications


Batch Capacity	100–150 kg	300–500 kg	1000–1500 kg
Sand Type	Phenolic Resin-Coated Sand (Hot-Box)	Phenolic Resin-Coated Sand (Hot-Box)	Phenolic Resin-Coated Sand (Hot-Box)
Heating Method	Thermal Oil Heating (180–220°C)	Thermal Oil Heating (180–220°C)	Thermal Oil Heating (180–220°C)
Mixing Motor	7.5 kW	18.5 kW	37 kW
Rotor Speed	150–300 rpm VFD adjustable	150–300 rpm VFD adjustable	150–300 rpm VFD adjustable
Mixing Time	60s–120s	60s–120s	60s–120s
Temp. Accuracy	±2°C
Control System	PLC + 7"/10.1" Color HMI	PLC + 7"/10.1" Color HMI	PLC + 7"/10.1" Color HMI
Communication	MODBUS RTU / PROFINET	MODBUS RTU / PROFINET	MODBUS RTU / PROFINET
Weight	1,200 kg	2,800 kg	5,500 kg
Protection Rating	IP55 (Control Cabinet IP65)	IP55 (Control Cabinet IP65)	IP55 (Control Cabinet IP65)

Typical Applications

Shell mold/core production for engine manifolds and turbo housings

High-surface-quality core production for valves and pumps

Integrated with sand heater, cooler, and robot for full automation

Supports multi-resin switching (phenolic, modified phenolic, etc.)

Connects to MES for traceability and process optimization

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.
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