MR-2L Tilt-Type Shear Eco-Friendly Smart Laboratory Internal Mixer(Kneader)
Product Details
MILL MR-2L Tilt-Type Shear Internal Smart Laboratory Mixer
Product Technical Documentation & Specifications
I. Product Overview
The MR-2L Tilt-Type Shear Internal Smart Laboratory Mixer is a highly efficient, eco-friendly, and intelligent laboratory mixing system. It is specifically engineered for the blending and dispersing of rubber, plastics, powder metallurgy, cermets, and macromolecular polymer materials. Integrating advanced German engineering concepts and manufactured under the ISO 9001:2015 quality management system, the equipment utilizes a "W"-shaped mixing chamber paired with an "M"-shaped upper ram and shear rotors. This design guarantees uniform material distribution, excellent dispersion, and stable material performance.
The system features a dual-channel dust extraction system, a patented powder-leak-proof shaft-end seal, and a Siemens PLC smart control panel. It delivers efficient mixing, precise data tracking, and a clean, aesthetically pleasing operation for material research, R&D, and university laboratories. Furthermore, it supports digitized experimentation by generating process data curves and enabling data import/export via USB.
II. Technical Principles
Inside the mixing chamber, two rotors rotate relatively at a specific speed ratio. The material from the feeding hopper is nipped and drawn into the mixing gap, where it undergoes compression and shearing by the rotors. After passing through the roll gap, the material hits the M-W sharp ridges of the chamber and is split into two parts. These parts flow along the gaps between the front/rear chamber walls and the rotors before returning to the top of the rotors.
The material moves dynamically within an "∞" (infinity-shaped) internal space, experiencing heating or cooling, shearing or intermeshing, and plasticizing or compounding. This advanced mechanism ensures uniform mixing and dispersion of various materials, achieving the precise requirements of the formula design and optimal physical properties.
III. Technical Parameters
| Technical Indicators | Parameter Details |
|---|---|
| Model | MR-2L |
| Effective Mixing Volume | 2L |
| Mixing Capacity | Approx. 1.5 ~ 3 kg (depending on formula density) |
| Temperature Range | Room temperature ~ 280℃ |
| Heating & Temp. Control | Electric heating, PID control (Static accuracy: ±3℃) |
| Cooling Method | Water cooling |
| Rotor Speed Ratio | Approx. 1 : 1.30 |
| Rotor Speed | 0 ~ 50 rpm (Variable frequency adjustable) |
| Rotor Type | Shear type |
| Rotor Hardness | HRC 58 ~ 62 |
| Chamber & Rotor Material | Core components in contact with materials (ram, chamber, rotors) are made of high-hardness 40Cr with a chrome-plated surface. |
| Discharge Tilting Angle | ≥110° |
| Upper Ram Type | Fully pneumatic material pressing (0.3 ~ 0.8 MPa) |
| Main Motor Power | 5.5 kW (6-pole) |
| Overall Dimensions | Approx. L 1920 × W 1100 × H 2250 mm |
| Machine Weight | Approx. 900 kg |
IV. Core Brand Configuration
| Component | Brand | Specifications | Features |
|---|---|---|---|
| Main Motor | ABB / Siemens | 5.5 kW | High efficiency, energy saving, stable high-torque output. |
| Inverter (VFD) | ABB | 7.5 kW | Precise speed regulation. |
| Gearbox / Reducer | GUOMAO | R Series | Hardened gear surface with widened and thickened design; high transmission efficiency, low noise. |
| PLC | Siemens + MCGS IoT Screen | 10-inch | Intelligent soft control; supports data storage and export. |
| Main Bearings | SKF | — | High precision, wear-resistant, long service life. |
| Low-Voltage Electrics | Schneider / Omron | — | Safe and reliable. |
| Self-Diagnostic System | MILL | — | Rapidly locks circuit fault points for convenient maintenance. |
| Eco-Friendly System | MILL | — | Built-in multi-channel dust collection and vacuum cleaner; sheet metal enclosure seals the entire mixing work area. |
V. Engineering Highlights & Advanced Technologies
1. Dual-Channel Dust Extraction & Eco-Friendly System
Traditional laboratory mixers are prone to flying dust during material feeding. MILL Machinery has thoroughly resolved this issue:
Dual Dust Extraction Channels: Captures dust and volatile gases generated during mixing from multiple angles, quickly venting them to an external exhaust or a built-in dust collector.
Automotive-Grade PET Filter: High-efficiency polyester fiber filtration structure achieves micron-level dust filtering, significantly improving laboratory hygiene and operator safety.
Dual-Slide Dust Hood: Smooth vertical lifting paired with upper and lower sealing mechanisms to maximize the prevention of dust leakage.
Built-in + Mobile Dust Collection: Features a built-in silent, high-efficiency suction power channel to collect spillage from feeding and minor dust at the back of the chamber. The main large channel is located inside the eco-friendly chamber to control dust for the entire machine. Concurrently, a mobile dust collector is provided to clean corners or accidental spills.
2. Patented Powder-Leak-Proof Shaft-End Seal
Four-Ring Locking Technology: The rotor shaft end adopts a patented design featuring dual wear rings and a dual-angular structure. Working in tandem with the four-ring locking function, it achieves highly effective powder-leak prevention that far surpasses traditional mechanical seals.
3. Intelligent Control & Safety Protection
Infrared Light Curtain Protection: An infrared safety light curtain is installed on the inside of the dust hood in front of the mixing chamber. If an operator's hand or a tool enters the danger zone, the equipment stops instantly and triggers an audible and visual alarm.
Full Data Digitization: The Siemens color touchscreen displays and records digital curves of current, speed, temperature, and torque in real time. Data can be exported via USB as Excel files for research traceability.
Recipe Storage: Capable of storing, numbering, and editing dozens of mixing recipes to ensure batch-to-batch testing consistency.
CE-Standard Circuitry: The electronic control cabinet complies with CE safety standards, featuring power-off protection and a smart self-diagnostic system to quickly locate faults.
4. High-Hardness Shear Rotor & Mixing Chamber Design
"M-W" Fully Enclosed Mixing Space: The bottom of the mixing chamber is "W"-shaped, and the upper ram is "M"-shaped, creating a completely enclosed pressurized mixing space for optimal shearing effects.
72-Hour Vacuum Nitriding Treatment: All components in contact with materials (rotors, chamber walls, upper ram) are made of high-strength 40Cr alloy, treated with 72-hour deep vacuum nitriding and mirror chrome plating. This provides extreme resistance to wear and corrosion while preventing material sticking.
Balanced Cooling Flow Channels: The shear rotors feature built-in continuous cooling water channels to balance axial forces, reduce frictional heat buildup, accelerate the dispersion of vulcanization systems, and improve mixing efficiency.
VI. Installation & Infrastructure Requirements
Power Supply: 380V, 50Hz/60Hz, 3-phase 5-wire system (voltage fluctuation within ±10%). Custom voltage configurations are available upon request.
Water Supply: Inlet water pressure of 0.2 ~ 0.4 MPa. Industrial softened water is highly recommended to prevent scaling; tap water or cooling tower water is also acceptable.
Air Supply: Air compressor connection required with a pressure of 0.4 ~ 0.6 MPa (the upper ram requires 0.3 ~ 0.8 MPa).
Unloading Equipment: The machine weighs approximately 900 kg. Users must provide their own forklift or crane for unloading and positioning the equipment.
