KR-110A Button Control Variable Speed Two Roll Mixing Mill (Electric Heating Type)

RT-110A 8-inch button type rubber mixer
KR-110A Button Control Variable Speed Two Roll Mixing Mill (Electric Heating Type) - Image 2
KR-110A Button Control Variable Speed Two Roll Mixing Mill (Electric Heating Type) - Image 3
KR-110A Button Control Variable Speed Two Roll Mixing Mill (Electric Heating Type) - Image 4
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Additional information

Model

RT-110A
Operation method

Button type
Temperature

room~300℃
Technique feature

Adjustable speed ratio
Applicable to

plastic rubber sheet
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RT-110A Open mixing mill (electrical heating)

This machine suitable for plastic industry polymer material mixing and processing such as, PVC, color master batch. Making the raw material and compound mixing, and achieve the required color and quality. The machine adopts special heated mold, roll surface temperature uniformity, never take off a layer, sample thickness can be mixed, the machine safety protection device, convenience to use.

Product Details：

RT-110A 8-inch button type rubber mixer

Product Introduction

The KR-110A bench-top two roll open mill is a multifunctional lab kneading device built for rubber, plastic, masterbatch compounding and formulation research. It features independent front & rear roller electric heating modules and dual variable frequency drive systems with customizable roller speed ratios. Operated via intuitive button control panel with dual digital temperature displays, this machine delivers stable thermal environment and adjustable shear intensity for diverse polymer raw materials.
Available in four standard roller sizes from 4-inch to 10-inch, it caters to small lab trial batches and medium pilot compounding. Widely adopted by polymer R&D labs, color masterbatch factories, footwear material manufacturers and third-party material certification labs, it fully complies with national rubber & plastic testing standards including GB 6038, GB/T 13577 and HG/T 2149.
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Full Machine View
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Control Panel
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Core Machine Advantages

  1. Independent Dual Roller Electric Heating & Precise PID Temperature Control

    Separate heating loops for front and rear rollers, supporting adjustable temperature up to 300℃ with ±3℃ accuracy. High-sensitivity digital thermometers display real-time roller surface temperature. Even heat distribution eliminates local hot spots to prevent plastic degradation and rubber scorching during long mixing cycles.

  2. Dual Independent Variable Frequency Motors, Customizable Roller Speed Ratios

    Two separate low-noise drive motors control front and rear rollers independently, allowing flexible speed ratio adjustment to match materials of different hardness and viscosity. Adjustable rotational speed enables precise shear force control for uniform dispersion of carbon black, pigments, glass fiber and mineral fillers without material tearing.

  3. Alloy Mirror Polished Roller Barrels with Outstanding Wear Resistance

    Rollers are forged from vanadium-titanium chilled cast iron, quenched and finished with mirror hard chrome plating to reach HRC 50–60 surface hardness. Smooth mirror finish prevents material adhesion and residue buildup, simplifying cross-formula cleaning and avoiding color contamination between batches. Hollow roller structure ensures fast, balanced heat transfer.

  4. Button Centralized Control Panel with Clear Digital Readouts

    User-friendly physical button operation layout equipped with two independent temperature displays, dedicated forward/reverse/stop switches and heating control buttons. Operators can quickly adjust temperature, roller rotation status and running speed without complex touchscreen navigation, ideal for continuous daily lab testing.

  5. Full Multi-Layer Safety Interlock Protection System

    Integrated multi-point collision emergency stop levers on both sides plus top emergency stop button. Once safety barriers are touched during operation, rollers instantly halt and reverse slightly to eliminate pinch risks. All moving transmission parts are covered by protective frames to meet global laboratory safety norms.

  6. Automatic Centralized Lubrication & Low-Vibration Transmission Assembly

    Hardened gear reducers deliver high torque with low running noise. Built-in auto oil supply unit continuously lubricates bearings and gear sets during operation, reducing manual maintenance frequency and extending the service life of core drive components. Integrated welded cabinet saves lab bench space and supports easy surface cleaning.

Technical parameters:

 

      Model

Project

 KR-110A-1 KR-110A-2 KR-110A-3 KR-110A-4
Roller Diameter

（metric /inch）

 120mm/4in 160mm/6in 200mm/8in 250mm/10in
Roller face width 250mm 320mm 500mm 650mm
Mixing capacity 0.3～2kg 0.5～3kg 1～10kg 2～15kg
Picking device SUS304 Stainless

steel hopper

 SUS304 Stainless steel hopper SUS304 Stainless steel hopper SUS304 Stainless steel hopper
Roller temperature RT～300℃ RT～300℃ RT～300℃ RT～300℃
Heating method electrical heating electrical heating electrical heating electrical heating
Temp Accuracy ±3℃ ±3℃ ±3℃ ±3℃
temperature controller PID control PID control PID control PID control
Roller hardness 50～60HRC 50～60HRC 50～60HRC 50～60HRC
Roller processing Mirror polishing chrome plated Mirror polishing chrome plated Mirror polishing chrome plated Mirror polishing chrome plated
Spacing display mode Calibration/digital display Calibration/digital display Calibration/digital display Calibration/digital display
Safety device Collision type emergency stop Collision type emergency stop Collision type emergency stop Collision type emergency stop
Special function Emergency stop inversion Emergency stop inversion Emergency stop inversion Emergency stop inversion
Motor power 4.5KW 5.5KW 7.5KW 15KW
Power voltage 3∮，AC380V 3∮，AC380V 3∮，AC380V 3∮，AC380V
Dimension 1*1.1*1.4（M） 1*1.1*1.5（M） 1.5*1.2*1.5（M） 1.5*1.3*1.6（M）
Weight ≈550kg ≈600kg ≈800kg ≈1500kg

Standard Operation Workflow

  1. Preheating & Parameter Setup

    Power on the machine, activate front and rear roller heating switches, set target temperatures via control panel and wait until temperature readings stabilize before feeding raw materials.

  2. Raw Material Mastication & Feeding

    Accurately weigh rubber/plastic base, pigments and functional additives, slowly feed the mixture into the roller nip. Repeat folding and thin-passing cycles to soften base materials and break down filler agglomerates.

  3. Roller Gap Calibration

    Adjust dual side handwheels to lock target sheet thickness, repeatedly fold and re-feed the compound to guarantee consistent color and filler dispersion.

  4. Continuous Specimen Sheeting

    After uniform mixing, pull smooth continuous sheets from roller clearance, cut into standard blanks for tensile, aging, hardness and abrasion performance testing.

  5. Shutdown & Daily Maintenance

    Turn off heating first, keep rollers rotating until surface temperature drops to room temperature before powering off. Wipe roller surfaces thoroughly and check automatic lubricant tank level for next operation.

Applicable Raw Materials & Industrial Scenarios

Rubber Compounds

Natural rubber, NBR, EPDM, silicone, recycled rubber, shoe sole and automotive sealing elastomers for formulation development and batch testing.

Thermoplastics & Modified Polymers

PVC, TPE, TPU, PP, PE, ABS, PC, glass fiber reinforced plastics, flame retardant and low-smoke halogen-free cable materials.

Functional Masterbatch

Color masterbatch, conductive masterbatch, foaming raw materials and soft flexible polymers for lab color matching and dispersion verification.
Main Application Fields:
  1. University & research institute material science teaching and polymer formula screening
  2. Rubber & plastic factory R&D labs for new material trial production and quality comparison
  3. Color masterbatch manufacturers for pigment dispersion testing
  4. Third-party accredited labs for standard test specimen preparation

Compliant Global & Domestic Testing Standards

  1. GB 6038-2006 Rubber Test Mixing & Vulcanization Equipment Operation Specification
  2. GB/T 13577-1992 General Technical Requirements for Rubber & Plastic Two Roll Mills
  3. HG/T 2149-2004 Test Methods for Open Rubber Mixing Mills
  4. JB/T 53113-1999 Quality Grading Standard for Plastic Open Mills

Standard Complete Delivery Kit

  1. KR-110A button control two roll mixing mill main unit
  2. Pair of mirror hard chrome alloy mixing rollers
  3. Dual independent electric heating assemblies with PID temperature controllers
  4. Button centralized operation control cabinet with dual digital temperature displays
  5. Dual variable frequency drive motors and hardened reducer assembly
  6. Manual roller gap adjustment handwheel set
  7. Full multi-point emergency stop safety protection system
  8. Automatic centralized lubrication pump unit
  9. SUS304 stainless steel material receiving hopper
  10. Multilingual operation manual, electrical schematics and factory inspection certificate
  11. Power cables and heating pipeline fittings

Global After-Sales & Distributor Support

We provide full remote operation training, mixing process parameter optimization guidance and long-term supply of wearing spare parts including rollers, heating tubes and sealing components. Custom roller dimensions, maximum temperature limits and machine exterior color options are available for bulk buyers. Exclusive regional distributor cooperation plans include priority order production, OEM private labeling and complete sets of product marketing pictures and catalogs.

Supplementary Image English Label Text (For Modifying Pictures Without Chinese)

Main Machine Banner: KR-110A Variable Speed Two Roll Mixing Mill | Electric Heating Lab Kneader

Control Panel Text: FNT TEMP / BCK TEMP / FNT HEATING / BCK HEATING / MAIN POWER / FORWARD / STOP / REVERSE

Safety Warning Label: WARNING Do Not Touch Rotating Rollers During Operation

Roller Feature Tags: Alloy Mirror Roller | Adjustable Speed Ratio | Independent Electric Heating | Multi-Point Emergency Stop

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KAREY products are trusted by customers across more than 100 countries, supporting long-term business growth in the testing equipment industry.
We are now seeking reliable partners to represent our brand in their local markets.

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KR-110A Button Control Variable Speed Two Roll Mixing Mill (Electric Heating Type)

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Opening Hours

Monday – Friday 9am-5pm 
Weekend – Closed

Address

Wentang, DongCheng District 523000, Dongguan City, Guangdong Province, PR China