Core Technology & Working Principle
Above roughly half a million cps a paste stops behaving like a liquid. It climbs the shaft, forms a rotating cavity around the impeller and refuses to circulate — so a single high-speed disc only ever mixes the material it can reach. A multi-shaft mixer solves that with two different jobs on one frame: a slow anchor frame sweeps the wall and the dished bottom and pushes material back toward the center, while two high-speed shafts work that returning material at their own speed. The three motors must be independent, because the correct anchor speed at powder charging is nothing like the correct disperser speed at let-down. Everything then happens in a sealed vessel under deep vacuum, so the air the paste picked up during charging is removed rather than stirred back in.
▲ Three Independent Motor Drives
Each shaft has its own motor and VFD, so speed and torque are tuned separately. Operators can scrape at low speed while charging powder to stop dust flight, then ramp the high-speed shafts only when the batch actually needs shear.
▲ Tri-Axial Circulation & Wall Scraping
The anchor frame carries flexible PTFE scrapers against the wall and the dished bottom, feeding material into the center. Two dispersing shafts with serrated Cowles discs or rotor-stator heads then create intersecting turbulent zones in that feed.
▲ Deep Vacuum De-Aeration
The vessel is sealed and pulled to -0.098 MPa, which expands trapped micro-bubbles until they rupture. That is what keeps a structural silicone or a battery paste free of voids and prevents skinning on the surface.
Precision Engineered Details
The four assemblies below are what determine whether a multi-shaft mixer actually reaches the bottom of the vessel — and whether it can be cleaned between batches.
PSM Technical Parameters
The table below lists the standard PSM line-up. Anchor speed falls as capacity rises, because the scraper only has to keep material moving back to the center, while the two dispersing shafts remain the high-shear elements.
| Model | Working Capacity (L) | Anchor Scraper Power & Speed | Disperser 1 Power & Speed | Disperser 2 Power & Speed | Lift Stroke (mm) | Vacuum (MPa) |
|---|---|---|---|---|---|---|
| PSM-100 | 100 | 2.2 kW (0–50 rpm) | 5.5 kW (0–1450 rpm) | 5.5 kW (0–1450 rpm) | 600 | -0.098 to 0 |
| PSM-200 | 200 | 4.0 kW (0–50 rpm) | 7.5 kW (0–1450 rpm) | 7.5 kW (0–1450 rpm) | 750 | -0.098 to 0 |
| PSM-500 | 500 | 5.5 kW (0–45 rpm) | 15.0 kW (0–1200 rpm) | 15.0 kW (0–1200 rpm) | 950 | -0.098 to 0 |
| PSM-1000 | 1,000 | 7.5 kW (0–40 rpm) | 22.0 kW (0–1200 rpm) | 22.0 kW (0–1200 rpm) | 1150 | -0.098 to 0 |
| PSM-2000 | 2,000 | 11.0 kW (0–35 rpm) | 37.0 kW (0–1000 rpm) | 37.0 kW (0–1000 rpm) | 1400 | -0.098 to 0 |
*Parameters represent standard multi-shaft configurations. Custom batch capacities from 50 L to 5,000 L, motor voltages (220V/380V/440V, 50Hz/60Hz), variable frequency drives, hydraulic extrusion discharge presses and explosion-proof configurations are engineered on request. Reference projects in your industry are available on request.
Our Manufacturing Advantages
🏢 Direct Source Factory
Shanghai Polyc Technology Co., Ltd. is not a trading house. Three-shaft alignment, hydraulic column machining and mirror vessel polishing are all done at our 9,000 m² Wuxi plant, so you buy at factory price and speak directly to the engineers who built your machine.
✈️ 30–45 Days Fast Delivery
Standardised structural lift frames and stocked stainless steel vessels let us ship standard PSM models within 30 to 45 days from drawing confirmation.
🛡️ Strict Quality Control
Every multi-shaft mixer undergoes 24-hour vacuum hold testing, shaft runout checks and a dry-run load test before dispatch, under our ISO 9001 and CE certified manufacturing system.
🔧 3-Year Global Warranty
Every PSM mixer is covered for three years on the main hydraulic lift structure, multi-shaft transmission assemblies and electric drive motors, with rapid DHL spare parts dispatch worldwide.
Target Application Spectrum
Multi-shaft mixers are specified where the product is too stiff for a single shaft to circulate, or where air entrapment cannot be tolerated in the finished part:
Structural Adhesives & Glues
Auto Body Fillers & Mastics
Lithium Battery Pastes
Silicone & PU Sealants
Ready to Discuss Your Powerful Multi-Shaft Mixer Requirements?
Tell us your formulation, operating viscosity in cps, target batch capacity and vacuum requirement — our Wuxi engineering team will specify the shaft combination, blade geometry, motor power split and jacket circuit, then quote directly from the factory within 24 hours.
Technical FAQ
Short answers to the questions buyers ask before specifying a triple-motor multi-shaft mixer.