Product Details
Item/Model | Unit | MR-2L |
Single Feeding Capacity | KG | 1.8-2.5 |
Main Motor Power(kW) | kw | 5.5 |
Tilting Motor | kw | 0.4 |
Tilting Angle | ° | 110 |
Air Compressor | kw | 2.2 |
Water Cooling | mpa | 0.2-0.4 |
Weight (approx.) | KG | 900 |
Overall Dimensions (approx.) | mm | 1920×1100×2250 |
Equipment Technical Description
1. Product Application
Suitable for blending, dispersing, stirring, plasticizing and mixing of polymer rubber, plastic and other materials.
2. Technical Principle
The two rotors in the mixing chamber rotate relatively at a certain speed ratio, drawing the material from the feeding port into the gap of the mixing chamber, where it is squeezed and sheared by the rotors.
After passing through the roll gap, the material hits the “MW” ridges of the mixing chamber and is split into two parts, which return to the upper part of the rotors through the gaps between the front and rear chamber walls and the rotors respectively.
The material moves in an “∞”shaped internal flow path, during which heating or cooling, shearing or meshing, plasticizing or compounding are applied. This ensures uniform mixing and dispersion of various materials, so that the physical properties meet the formula design requirements or achieve optimal performance.
3. Mixing System Description
1.Mixing Chamber Design
The bottom is “W”shaped, and the top ram cover is “M”shaped, forming a fully enclosed mixing space.
The mixing blades adopt a ridged spiral, nondeadangle design, so that the shearing and dispersion of materials meet physical property requirements.
The mixing blade has a hollow structure. The part in contact with the material is made of highhardness 40Cr, after quenching and tempering, highprecision machining, 72hour vacuum deep nitriding heat treatment, hard chrome plating on the surface, and polishing treatment. It is wearresistant, not easy to stick materials, and has a long service life.
2.Tangential Rotor Structure of Internal Mixer
The rotor consists of long wings, short wings, rotor body and circulating cooling water channels in the through inner cavity of the rotor.
One long wing and one short wing form a set, and two sets are evenly distributed on the rotor body, extending spirally from the rotor end to the center.
The starting edge of the long wing is not connected to the rotor end, while the starting edge of the short wing is connected to the rotor end.
Rotary circulating cooling water channels are machined on the through inner cavity wall and wing areas of the rotor.
Thus, the axial force of the rotor is balanced during operation, with less heat generation, sufficient mixing, accelerated distribution of the vulcanizing system, increased filling factor and excellent cooling effect.
This improves the quality and efficiency of mixed rubber. The parts in contact with materials have high wear resistance.
Design Features of Mixing Chamber and Rotor Wings:
Adaptable to changes in formula characteristics, with targeted optional configurations.
Rotor Material: Highhardness 40Cr alloy, wearresistant and corrosionresistant.
4. Temperature Control Description
A. Heating System
1. Heating method: Electric heating
2. Heating range: Room temperature ~ 280 °C
3. Heating accuracy: PID ±3 °C (static)
4. Heating system: Electric heating (depending on the heat absorption rate of the material)
5. Heating area: Mixing tank (W‑shaped tank) of the mixing chamber
B. Cooling System
1. Cooling area: Central cooling of parts in contact with materials; priority selection is recommended if conflicting with multi‑functional mixing chamber.
2. Cooling medium: Water cooling
3. Automatic temperature control & constant temperature:
When the set temperature is e.g. 100 °C, the automatic central control system will command the heating system to heat slowly at 95 °C.
When reaching the critical temperature, the control system stops heating and activates the cooling system to achieve stable constant temperature.
5. Electrical Control System Description
1. Control Cabinet: Dust‑isolated structure, with integrated display of water, gas and oil circuits.
2. Safety Function: Infrared light curtain protection on both sides of the mixing chamber.
If hands or tools enter the dangerous area, the mixer will emergency stop and lock out.
3. Self‑Check System: Detects misoperation and electrical faults, protects equipment, facilitates maintenance and ensures correct operation.
4. Digital Control: All data including current, speed, temperature and torque are digitally controlled for clear and intuitive operation.
5. CE Certification: Circuit design complies with CE standards.
Electrical components: OMRON, Schneider and other famous brands.
The control cabinet is equipped with safety stop device.
6. Power Transmission System
1. High‑efficiency motor with good transmission, energy saving and long service life.
SIEMENS motors are available for stable output and high torque.
2. Reducer: Hardened tooth surface gear reducer, more compact (≈25% smaller in size and weight) than conventional types.
All gears are hardened, wear‑resistant and ground.
Gear Material: 42CrMo high‑hardness material, nitrided, precision‑machined by West German‑imported equipment, high accuracy, excellent assembly quality, low wear, low noise, low failure rate, energy saving and high transmission efficiency.
Lubrication: High‑purity special gear oil and grease.
7. Dust Control & Environmental Protection System
1. Shaft Anti‑dust Leakage: Patented dual wear‑ring & dual corner design with four‑ring locking, effectively preventing dust leakage at the shaft end.
2. Dust Collection: Built‑in silent high‑efficiency dust suction channel, collecting dust from feeding and mixing at the rear of the mixing chamber.
The large channel is inside the environmental protection chamber to control dust of the whole machine.
A movable dust collector is also available for cleaning corners and spilled dust.
3. High‑Seal Dust Cover:
Dual‑slide design for smoother lifting; upper and lower sealing devices for better sealing effect.
4. Cylinder & Limit Switches: Built‑in type, stable positioning, high precision, neat and convenient.
5. Environmental Dust‑Proof Structure:
Dual dust collection channels efficiently collect dust and toxic gas from multiple angles during mixing and discharge them to the external workshop or dust system.
PET polyester fiber filter (automotive air filter structure) provides excellent dust treatment.
It improves laboratory/workshop hygiene and operator safety. The whole machine is covered with multi‑layer protection.
8. Noise Description
At 1 m from the machine:
- No‑load: Below 62 dB
- Full‑load: Below 69 dB
