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2L Lab Vacuum Screw Discharge Kneader

Specifications:
  • Volume Capacity: Total 2 Liters / Effective Working Volume 1.4 Liters
  • Mixing System: Sigma (Z) Type Blades; Supports Forward & Reverse Rotation
  • Discharge Method: Screw Extrusion with DN50 Manual Ball Valve
  • Vacuum & Cooling: -0.09 Mpa Vacuum System (Pump, Buffer Tank, Metal Hoses included); Jacketed for Circulating Water Cooling
  • Motor & Safety: 1.1kW 4-Pole Motor (Brand: Beide); Auto-stop Safety Interlock Limit Switch on Lid
  • Material: Contact Parts SUS304 Stainless Steel (High-Precision Mirror Polished)
 
【Application Industry】:
Widely used in mixing and kneading of low-to-high viscosity products in many industries such as ceramics, silicone rubber, sealants, clay, chewing gum, candy, bakery food, pharmaceuticals, carbon paste, inks/pigments ,etc.
  • NH-2

  • KARVIL

Availability:
2L Lab Vacuum Screw Discharge Kneader (2)

Standard Design(Customizable):


Material: SUS 304, 316 or mild steel 

Discharging: Tilting discharging/Screw extruding discharging/Bottom plate 

Heating: Electric heating/Water heating/Oil heating/Steam heating 

Cooling: Water cooling/Jacket cooling

Vacuum: Water-ring vacuum pump/ buffer tank. 

Motor: Explosion proof motor Independent Control Panel: Variable speed/ Temperature/Discharging 

Working Volume: 5 to10,000 Cubic Feet (from experiment to production)

Stainless Steel Sigma Mixer with Screw Discharge

Stainless Steel Sigma Mixer with Screw Discharge (2)

Product Overview

The Karvil 2L Lab Scale Vacuum Screw Discharge Kneader is a compact, high-performance mixing solution designed for university laboratories, research institutes, and enterprise R&D centers.

Engineered for high-viscosity materials (such as PVC, epoxy resins, and rubber compounds), this machine features Z-shaped Sigma blades and a Screw Extrusion system, ensuring uniform mixing and 100% effortless discharge. The vacuum design allows for bubble-free processing, while the mirror-polished interior ensures zero contamination and easy cleaning between test batches.


Key Features & Technical Advantages

  • Precision Mixing (Sigma Blades): equipped with robust Sigma blades that can rotate forward (for kneading) and reverse (for screw discharge), providing intense shearing and kneading forces.

  • Vacuum & Cooling System:

    • Vacuum Degree: Achieves up to -0.09 Mpa with the included vacuum pump and buffer tank, perfect for degassing.

    • Temperature Control: Integrated Cooling Jacket with circulating water prevents material degradation during mixing.

  • Optimized Screw Discharge: Features a screw extruder with a DN50 Manual Ball Valve at the outlet. This allows for controlled discharge and shaping of the material, eliminating manual scraping.

  • Safety Interlock System: Designed with EU safety standards in mind. The machine automatically stops if the lid is opened, ensuring operator safety.

  • Sanitary Design: All parts contacting the material are made of SUS304 Stainless Steel with a Mirror Polished finish. This minimizes residue adhesion and simplifies the cleaning process.

  • Reliable Power: Powered by a 1.1kW 4-Pole Motor (Brand: Beide), offering stable torque and long service life.



    Technical Parameters

              Type NH-5 NH-10 NH-100 NH-300 NH-500 NH-1000 NH-1500 NH-2000 NH-3000 NH-4000 NH-5000
    Total Volume (L) 5 10 100 300 500 1000 1500 2000 3000 4000 5000
    Mixed amount/batch (L) 1.5-3.5 3.0-7 30-70 90-210 150-350 300-700 450-1050 600-1400 900-2100 1200-2800 1500-3500
    Rotation Speed (rpm) 42/34 42/34 37/21 37/22 37/23 37/26 37/22 30/21 30/21 30/20 28/18
    Main Motor Power (Kw) 0.75-1.5 1.1-3 5.5-11 7.5-30 15-37 22-90 22-90 30-110 30-110 45-110 55-132
    Heating Methods Steam Pressure (MPa)                                                                             Jacket for steam
                                                                                       ≤0.3MPa
    Electric Power (Kw) 2.4 2.4 6 12 18 30 45 54 72 72 90
    Vacuum (MPa)                                                                 0~ -0.096Mpa (Vacuum Kneader)
    Discharging Method                                                                             Tilting cylinder
                                                                                Screw extrusion


    Applications

    ceramics-mixing-machine clay-mixer-machine-karvil masteratc-mixing-machine bakery-food-mixing-machine
    silicone-rubber-mixing-machine chewing-gum-mixing-machine 粘合剂 candies-mixing-machine


    Our Services

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    LABORATORY TEST


    In order to be able to demonstrate the advantages and modes of action of our industrial mixing machine with your products, our fully equipped modern laboratory/technical center is at your disposal.


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    PROFESSIONAL ENGINEERFood-Powder-Horizontal-Ribbon-Mixer-2_副本


    The experienced team of engineers is specialized in the R&D and design of mixers, grinding equipment, and plastic recycling machine.  Karvil explores new technical points constantly to create perfect solutions for customers.


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    DIRECT FACTORY


    Karvil factory has a series of strict standard system to control the procurement of raw materials, manufacturing process, in-process inspection, and product inspection, so as to ensure the quality of our products.


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    CERTIFICATIONS

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    F.A.Q.

    1.Manufacturer or trading company?

    We are a professional manufacturer with over 20 years of experience, specializing in Sigma Mixers, Ribbon Blenders, and Planetary Mixers. Unlike trading companies, we have our own R&D team and strict quality control system, which allows us to offer direct factory prices and technical support.

    2.What is the main market for your company?

    Our machines have been exported to over 50 countries, including markets in Europe, America,Australia and Southeast Asia. We serve industries ranging from chemicals, energetic materials, adhesives, and sealants to food and pharmaceuticals.

    3.How do you ensure the quality of the machine before delivery?

    Quality is our priority. After production, we conduct a strict FAT (Factory Acceptance Test). We run the machine empty and with load (if applicable) for continuous hours to check noise, vibration, sealing, and temperature. We will send you a detailed running video. You are also welcome to visit or hire a third party (like SGS/BV) for inspection.

    4.Can I track the production progress of my order?

    Yes. During the production process, our sales team will update you with photos and videos of key stages (machining, welding, assembly, painting) so you can know exactly the status of your equipment.

    5.How about the installation and services?

    We provide comprehensive support:

    Documents: Detailed English manual, electric diagram.

    Online Support: Lifetime remote video guidance for installation and troubleshooting.

    On-site Service: If needed, we can dispatch engineers to your factory for installation, commissioning, and staff training.

    6.How do you pack the machine to ensure safety during long shipping?

    We use export-standard plywood cases ensuring stability. For the machine surface, we wrap it with multiple layers of stretch film to prevent moisture and corrosion during sea transportation.

    7.Can you provide customized products?

    Yes, we have professional engineers to meet your special design needs, so we can provide customized products.

    8. What are the payment terms and delivery time?

    Production begins after confirming details and receiving a 50% deposit. It usually takes 20-30 days. Once you approve the machine via test videos or on-site inspection, we will arrange shipment immediately after the balance payment.

    9.About the product warranty?

    We provide 12-month warranty starting. Within the warranty period, we provide free replacement parts with DHL/Fedex . Beyond the warranty, we offer cost-price spare parts and lifetime technical support.





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    Karvil products have been successful used in the field of powder processing, food, medicine, fine chemical industry.