Vertical kneader VK series

planetarybatchsolid/liquid

Overview
Vertical kneader for electronic thermal interface materials is an intelligent mixing solution developed by JCT for high-solid, high-viscosity thermally conductive formulations used in electronics. The machine is engineered to address issues such as extreme viscosity, temperature sensitivity, air entrapment and strict limits on metal contamination and electrical insulation.

Materials and formulation
Thermally conductive electronic materials are composite pastes, greases, films, pads, tapes or phase-change materials produced by dispersing inorganic thermally conductive fillers into a polymer matrix (for example silicone). Final heat-transfer performance depends primarily on filler intrinsic conductivity, filler loading level and dispersion uniformity.

Key features

• Drive and sealing systems located entirely above the material zone to prevent metal contamination.
• Capable of processing materials with viscosities up to 20,000,000 cP.
• Optional ultra-wear-resistant coatings (WC, PTFE, silicon nitride) to minimise wear and avoid metal dust that could compromise electrical insulation.
• Planetary mixing action (revolution + rotation) eliminates dead zones and ensures homogeneous dispersion; supports vacuum degassing to remove entrained air/bubbles.
• Multiple interchangeable mixing vessels for efficient production, simplified discharge and easier cleaning.

Technical specifications (table)
Model | Dimension H*L*W (mm) | Weight | Barrel Inner Size D*H (mm) | Full Volume (L) | Useful Volume (L) | Min Volume (L) | Power (kW) | Pericentric Blade Speed (rpm) | Telecentric Blade Speed (rpm) | Revolution Speed (rpm) | Clearance (mm) | Vacuum Abs Pressure (kPa)
VK-10 | 2600*1600*1400 | 2.5t | 300*240 | 16.9 | 12 | 2 | 5.5 | 0~25 | 0~50 | 0~6 | 3±0.5 | <1.5
VK-100 | 3200*2000*1600 | 6t | 600*480 | 135 | 100 | 15 | 22 | 0~25 | 0~50 | 0~6 | 4.5±0.5 | <1.5
VK-500 | 4200*2500*2000 | 12t | 900*800 | 500 | 350 | 60 | 37 | 0~22.5 | 0~45 | 0~6 | 5.5±0.5 | <1.5
VK-1000 | 5100*3000*2500 | 24t | 1200*1100 | 1000 | 600 | 120 | 45 | 0~22.5 | 0~45 | 0~6 | 6±1 | <1.5
VK-2000 | 6000*4200*3000 | 32t | 1400*1300 | 2000 | 1200 | 200 | 55 | 0~20 | 0~40 | 0~6 | 7±1 | <1.5
VK-3000 | 6500*4600*3400 | 35t | 1600*1500 | 3000 | 1800 | 300 | 75 | 0~20 | 0~40 | 0~5 | 8±1 | <1.5
VK-5000 | 7300*5000*3600 | 40t | 1900*1800 | 5000 | 3000 | 500 | 110 | 0~18 | 0~36 | 0~5 | 9±1 | <1.5

Advantages

• 01 Solvent-free compounding: reduces or eliminates solvent use; enables lower-temperature processing of high-viscosity formulations.
• 02 Improved product purity and uniformity compared with conventional equipment.
• 03 Planetary mixing eliminates dead zones to ensure consistent dispersion.
• 04 Enables higher solids/filler loading (up to 96%), improving thermal conductivity of finished products.
• 05 Production efficiency: interchangeable vessels simplify batch changeover, discharge and cleaning.

Specifications / Technical data

• Model series: VK series (VK-10, VK-100, VK-500, VK-1000, VK-2000, VK-3000, VK-5000).
• Full volume range: ~16.9 L (VK-10) to 5000 L (VK-5000).
• Useful volume range: 12 L to 3000 L depending on model.
• Maximum processable viscosity: up to 20,000,000 cP.
• Power range: 5.5 kW to 110 kW depending on model.
• Blade speeds and revolution: pericentric blade speed and telecentric blade speed adjustable per model (ranges in table); revolution speed adjustable per model.
• Clearance control: specified per model (examples in table).
• Vacuum absolute pressure capability: <1.5 kPa.
• Wear-resistant coating options: tungsten carbide (WC), PTFE, silicon nitride.