Planetary kneader VK series

verticalbatchsolid/liquid

Overview
Vertical kneaders of the VK series provide essential process control for production and R&D of medical polymer materials (dental resins, bone cements, medical-grade silicone, bio‑hydrogels). The vertical design isolates drive and seals above product level, enabling high‑vacuum degassing and eliminating shaft‑seal contamination risk; suitable for GMP‑aligned sterile processing of ultra‑high‑viscosity formulations.

Key capabilities
Only mixing blades and vessel contact product; high‑vacuum degassing removes low‑molecular‑weight species; jacketed vessel plus scraping agitators provide precise temperature control and full discharge/CIP/SIP capability.

Features

• 01 Solvent‑free processing
• Eliminates need for solvents, simplifying synthesis and mixing while reducing toxicity, energy use and emissions.
• 02 Ultra‑high vacuum
• Efficient removal of low‑molecular‑weight polymers formed during polymerization.
• 03 No material contamination
• Contact limited to blades and vessel, preventing foreign‑matter contamination.
• 04 High‑quality finished products
• Superior purity, strength, toughness and homogeneity compared with other mixing equipment.
• 05 Increased solids content
• Allows higher filler loading to reduce material cost and improve performance.
• 06 High‑efficiency production
• Multiple vessels can be used in rotation to facilitate discharge and cleaning.

Main application areas

• 1. Dental compounds — mixing highly filled dental composite resins and glass‑ionomer cements with strong shear to disperse fillers without damaging polymer chains.
• 2. Medical‑grade liquid silicone rubber (LSR) — uniform incorporation of fillers and APIs into high‑viscosity A/B silicone components under high vacuum.
• 3. Medical bone cement (PMMA) — rapid wetting and degassing of PMMA powder and liquid monomer to avoid air‑bubble defects.
• 4. Medical hydrogels and hyaluronic acid — gentle, effective kneading of high‑viscoelastic materials to preserve crosslinked networks.

Equipment parameters (VK series)
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 | 10 | 0 | 15 | 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

Structural characteristics
Drive and seals located above product level remove shaft‑seal contact with material, minimizing contamination risk. Minimal dynamic seals and use of static seals enable sustained high vacuum (better than -0.098 MPa). Vessel is lowerable/movable as a unit for thorough CIP/SIP; jacketed vessel with scraping blades ensures uniform heat transfer and temperature control within ±1°C.

Technical characteristics

• Contact surfaces: only blades and vessel contact product to minimize contamination risk.
• Vacuum capability: sustained high vacuum (better than -0.098 MPa); vacuum absorption pressure typically <1.5 kPa.
• Temperature control: jacket plus scrapers for uniform heat transfer and ±1°C precision.
• Mixing mechanics: planetary/vertical kneading with pericentric and telecentric blades plus revolution for high‑shear mixing of ultra‑high‑viscosity materials.
• Cleaning & discharge: vessel designed with no dead zones; easy lowering/movement for CIP/SIP.
• Model range: VK series from laboratory to large production capacities (useful volumes ~12 L to several thousand liters; power and blade speeds vary by model as listed).