•Lab scale two Roll silicone rubber mixing mills
•Material of Rolls: Made from chilled cast Iron hollow ground finished for even heating & cooling.
•Roller bearing: Anti-friction Spherical Roller Bearing.
•Brake and emergency stop devices can guarantee the operator’s safety.
•Human nature designed the controlling system to ensure labor safety.
•Specially designed seal structure can eliminate the leaking phenomenon of lubricating oil.
•Widely used in rubbers and plastics industry for polymer mixing, such as PVC, color master batch.

Description

The silicone mixing machine is suitable for mixing rubber, synthetic rubber, plastic ,polymer ,color masterbatch ,E.V.A. or P.V.C., etc. It is used for Extruder, Calender, Hot Press, or other processing machinery to make Rubber or Plastic products.

The rubber mixing machine mainly comprises a body-shaped frame, frame, roller, transmission gear, gear reducer, motor, and other parts. It is specially designed for bearing heavy loads under extreme working conditions; the lab scale two roll mixing mill is suitable for polymers such as rubber and plastic industry mixing process.

This lab open mixing rubber mill is mainly used for mixing silica gel and rubber equipment. It has fine structure, safety and convenience, broad applicability, and high efficiency.

The roller is made of chilled cast iron, hollow, and filled with water but a water system. Its front roller is driven by a pair of speed ratio gears installed at the left end of the roller, while the rear roller is driven to rotate by the transmission gear. Thus, the two rolls would rotate at different speeds in relative directions, mixing the material well.

Mixing machines for silicone and other chemicals are essential for manufacturing products that require high consistency and viscosity. Mixing mill products are designed specifically for this purpose and are the perfect choice for anyone looking to produce high-quality liquid silicone rubber.

This versatile machine is perfect for high and low viscosity mixers, making it the perfect choice for liquid silicone rubber production. Additionally, our mixer can also be used for other chemical production, such as paint, chewing gum, ink, silicone sealant, and more.

How Does a Simptek Laboratory Dispersion Kneader Work?

This lab dispersion kneader is specially designed for mixing a variety of materials ranging from low viscosity adhesive to high viscosity polymers with various additives, such as fillers, plasticizers, and vulcanizing agents. The laboratory kneader feature with small volume, and lower power consumption,it is a high-performance mixing device specially used for for formulation research and small-scale manufacturing.

The dispersion kneader has two blades that rotate toward side to side to cut, mix and blend materials applying different speeds and shear force,which accordingly provide excellent cross mixing of all raw materials.

Steps in the Rubber Mixing Process

1. Introduction of the Polymer

The rubber mixing process begin from the introduction of the polymer, the basic structure of rubber compounding. The choice of polymer material contribute to the foundation for the material’s performance and dictates its inherent characteristics.

2. Sequenced Addition of Ingredients

While the polymer typically has the largest impact on the characteristics, additional ingredients are added would determine its features ,including curing and processing performance, consideration of production cost , hue designation, anti-degradation, and many other . This may be fillers, plasticizers, curing agents, accelerators, etc.

3. Achieving Homogeneity in the Compound

The ultimate goal is to achieve thorough homogeneity. Through well-mixed and blended of all ingredients ,it would create a uniform and consistent rubber compound. A homogeneous rubber compound ensures uniform characteristics throughout production processing, curing and the final application of finished rubber goods. This is achieved by carefully adjusting the several key mixing parameters according to the compound requirements while carefully considering chemical interactions of ingredients. Each rubber compound performs and reacts differently to the process. Therefore , to create a ideal mixture ,it requires an experienced operator execute on each compound’s detailed and exact mixing procedure .

plastic polymer Open Mixing Mill

Applications of Rubber Mixing Mill

*Tire Manufacturing: In tire production, the laboratory dispersion kneaders are essential for mixing natural or synthetic rubber with various additives, such as fillers, plasticizers, and vulcanizing agents. Our equipment precisely controls temperature and pressure during kneading, enhancing tire grip and wear resistance.

*Rubber Product Compounding: Dispersion kneaders are widely used to produce rubber compounds like sealants, silicone rubber ,gaskets, hoses, and conveyor belts. Efficient mixing and material distribution enhance the physical properties of rubber, such as strength, elasticity, and chemical resistance, making our equipment suitable for the automotive, aerospace, and construction industries.

*Polymer and Chemical Processing: In the polymer and chemical industries, this laboratory dispersion kneader produce rubber and plastic products such as films, sheets, adhesives, and Pharmaceutical industry.

Why Chose Our Open Mixing Mill

* Enhanced productivity : Increase your production efficiency with this high-capacity kneader, reducing processing time and enhancing overall output.
* Consistent Quality : Achieve unparalleled consistency in rubber compounds ,satisfying the most stringent quality standards with every batch.
* Precision & Durability : High-quality precision-engineered rolls for durability
* Versatility : Suitable for a wide range of rubber formulations and applications , also applied for diverse industry needs .
* Reliable Performance : Experience reliable and precise mixing ,ensuring uniform dispersion and superior product quality
* Tailored to Requirement :Customizable configurations available (motor power, speed ratio, automation)
* Excellent Serve : Reliable after-sales service and technical support

Safety Feature

*Emergency brakes with limit switch
*Emergency brakes Chest bar with reverse INCH facility provided
*Emergency brakes Provided on both sides to stop machine in ⅓rd Revolution of Front Roll
*Auto reversible control panel
*Hydraulic & Electromagnetic Thruster Brakes

❓ FAQ – Open Mixing Mill with Bearings vs Nylon Bushes
Bearings support rolls to rotate smoothly and maintain consistent pressure at the nip point, ensuring stability, precision, and low-friction operation . Bearings maintain the alignment and stability of the rolls , preventing excessive vibration or dangerous roll collisions, thus they are ideal for heavy-duty and industrial mixing While Nylon bushes are cheaper and easier to maintain , but it create more friction, wear faster, and are better suited for light-duty or laboratory applications.
Bearings (roller or spherical) support the rolls, ensuring low-friction rotation . They are more durable, energy-efficient, and precise, ensuring consistent mixing quality and longer service life. While nylon bushes are low at initial cost, they require frequent replacement and cause higher energy consumption on long-term .
For small labs or light-duty work , nylon bushes may be suitable due to initial investment and easier maintenance. However, if precision and long-term durability are priorities, then mixing mill with bearings would be better choice.
Bearings are a critical component for two-roll mills, it support the rotating rolls, reduce friction, and maintain precise alignment. Bearing directly influence mixing consistent quality, energy consumption, long-term durability, and maintenance. This ensures consistent sheet thickness, smooth operation, and longer equipment life.
There are mainly 4 types bearing in the market ,including nylon bush bearings , bronze bush bearings , spherical roller bearings, and tapered roller bearings. Each has unique advantages on load, speed, and alignment requirements.Depending on the design and application requirements, different types of bearings are used.
Bearings directly determine how efficiently, reliably, and consistently the mill machine operates , impact mixing quality, energy efficiency, machine durability and maintenance, and stability and safety. High-quality bearings ensure stability and high precision, while worn or low quality bearings may lead to vibration, uneven mixing, and higher maintenance costs.
Lubrication schedules depend on the bearing type, load, and operation conditions and its regular maintenance. Generally, regular lubrication is recommended for lab two roll mills weekly or monthly, while heavy-duty industrial mixing mills may require continuous or automatic lubrication systems.
Yes. Simptek providers serve for bearing upgrades or upgraded to improve performance, reduce maintenance, and extend the service life of two roll mills. Upgrading to spherical or tapered roller bearings can significantly enhance efficiency , stability and reliability.
Poorly maintained bearings can lead to increased friction, energy Consumption , overheating, roll misalignment, noise, and even sudden breakdowns, which can compromise both safety and product quality.

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