Double Cone Blender: Specifications & Price Guide 2026 | POLYC
Double Cone Blender: Specifications & Price Guide 2026
Industrial symmetrical double cone rotary blenders (100L to 5,000L+) for delicate granules, milk powders, pharmaceutical antibiotics, and friable crystals — zero shear damage, optional de-agglomerating intensifier bar, sanitary mirror finishes, and direct factory pricing.
In bulk solids handling, shear-sensitive powders present a severe quality dilemma: "How do we homogenize fragile spray-dried granules, freeze-dried instant coffee, antibiotic crystals, or delicate plastic pellets without crushing particle geometries, generating electrostatic friction heat, or creating residual unmixed dead corners at discharge?" While high-speed blade blenders generate excessive shear friction that pulverizes delicate crystals, the Double Cone Blender (W Series) operates via pure gravitational inter-tumbling. As the symmetrical dual cones rotate at gentle speeds ($6\text{--}20\,\text{rpm}$), the bulk solids continuously slide, divide, and fold across the conical walls, achieving over 99% homogeneity ($CV \le 1.5\%$) without particle attrition.
Forming an essential pillar of POLYC's dry powder machinery alongside our convective Ribbon Blender Guide, asymmetric PYXM Gravity Powder Mixer, and ultra-uniform Three-Dimensional Motion Mixer, the W Series Double Cone Blender is the industry benchmark for low-energy, zero-damage bulk homogenization. This guide covers four core capacity tiers — Pilot & Small Batch Units (100L–300L), Commercial Production Blenders (500L–1,000L), Heavy-Duty High-Capacity Mixers (2,000L–3,000L), and Continuous Tonnage Systems (4,000L–5,000L+) — helping process engineers evaluate internal intensifier bars, brake motor indexing, and clean-in-place (CIP) configurations before procurement.
POLYC has engineered and commissioned over 450 double cone blenders worldwide for infant nutritional formula facilities, pharmaceutical solid dosage plants, catalyst producers, and masterbatch compounding lines.
POLYC Double Cone Blender: Heavy Symmetrical Stand, Sanitary SUS316L Mirror Finish, Safety Perimeter Barrier, and Precision Rotary Butterfly Valve.
Double Cone Blender Specifications & Working Capacities
| Model Series & Class | Total Vessel Volume | Working Load (40–50%) | Cone Speed (r/min) | Drive Power & Optional Chopper | Relative Investment Tier |
|---|---|---|---|---|---|
| 1. Pilot & Small Batch (W-100 / W-300) | 100L – 300L | 40L – 150L (20 – 100 kg/batch) |
12 – 20 rpm | 1.1 kW – 2.2 kW; Optional 1.1 kW internal de-agglomerator pin bar; manual butterfly valve | Entry Commercial Tier |
| 2. Standard Industrial (W-500 / W-1000) | 500L – 1,000L | 200L – 500L (120 – 400 kg/batch) |
10 – 16 rpm | 3.0 kW – 5.5 kW; Optional 2.2 kW intensifier bar with liquid injection nozzle; pneumatic butterfly | Core Production Tier |
| 3. Heavy-Duty Production (W-2000 / W-3000) | 2,000L – 3,000L | 800L – 1,500L (500 – 1,200 kg/batch) |
8 – 12 rpm | 7.5 kW – 11.0 kW; High-torque helical-bevel brake motor; automatic upright laser positioning | Large Batch Tier |
| 4. Continuous Bulk Tonnage (W-4000 / W-5000+) | 4,000L – 5,000L+ | 1,600L – 2,500L+ (1,200 – 2,500+ kg) |
6 – 10 rpm | 15.0 kW – 22.0 kW; Heavy structural A-frame pedestals with self-aligning spherical roller bearings | High-Tonnage Plant Tier |
*Note: Symmetrical double cone mixers require an optimal 40%–50% charge volume to allow free gravitational cascades. Batch weight capacity varies based on material bulk density ($0.4\text{--}1.8\,\text{g/cm}^3$). All contact parts are available in SUS304 or mirror-polished SUS316L ($Ra \le 0.4\,\mu\text{m}$) with full cGMP qualification packages.
How to Select Your Double Cone Blender Configuration
Select the ideal blender construction based on granule friability, lump-forming tendencies, sanitary cleaning standards, and product batch changeovers:
Scenario A: Freeze-Dried Coffee, Beverage Granules & Cereals
Process Profile: Highly friable agglomerates and aroma-rich granules that fracture under mechanical blade impact.
Optimal Configuration: Plain internal cone geometry without internal baffles or choppers. Pure gentle tumbling rolls granules smoothly across the $60^\circ$ conical walls, achieving complete homogeneity while preserving granule shape, particle size distribution, and volatile aromas with zero dusting.
Scenario B: Pharmaceutical Active APIs, Excipients & Antibiotics
Process Profile: Blending micro-dosed active pharmaceutical ingredients into excipients with zero cross-contamination risk.
Optimal Configuration: Full SUS316L construction with internal electro-polishing ($Ra \le 0.2\,\mu\text{m}$) and sanitary tri-clamp butterfly discharge. Smooth conical angles eliminate product holdup, enabling 100% gravitational discharge and rapid clean-in-place (CIP) washdown between validation batches.
Scenario C: Cohesive Chemical Powders with Liquid Additives
Process Profile: Powders prone to clumping, static agglomeration, or requiring micro-dosing of liquid binders and oils.
Optimal Configuration: Double cone blender equipped with an Internal High-Speed Intensifier Bar (De-agglomerator). Driven independently at $1,000\text{--}1,500\,\text{rpm}$ through hollow trunnions, the pin bar disintegrates micro-lumps as powder cascades past, ensuring uniform liquid dispersion without over-shearing the bulk mass.
Scenario D: Polymer Masterbatch Pellets & Metallic Powders
Process Profile: Blending virgin resin pellets with color additives or heavy metal powders without friction wear.
Optimal Configuration: Heavy-gauge SUS304 double cone with reinforced shaft journals and outboard pillow-block bearings. High-inertia structural geometry handles high specific gravity loads effortlessly while preventing electrostatic plastic smearing on inner walls.
Key Double Cone Blender Application Sectors
Coffee & Drinks
Low-energy tumbling protects instant beverage granules from crushing.
Pharma APIs & Pellets
cGMP compliant mirror-polished vessel with total gravitational emptying.
Seasoning & Spices
Uniform distribution of spice extracts into salt and sugar bases.
Polymer Pellets
Non-destructive blending of masterbatch additives and resin beads.
Engineering Architecture: Conical Kinematics, De-Agglomeration & cGMP Discharging
1. Symmetrical Dual-Cone Geometry & Zero Shear Gravitational Diffusion
Unlike mechanical blenders where rotating agitator blades collide violently with powders, the double cone mixer rotates the entire vessel around a central horizontal axis.
The vessel consists of two conical sections joined to a central cylindrical band. As the mixer rotates $360^\circ$, the material in the lower cone slides upward, converges into the narrow apex, and cascades freely across the center section into the opposite cone. This cyclic splitting and folding action produces gentle, thorough diffusive mixing throughout the powder bed. Because there are no internal shear points, fragile crystal lattices and delicate agglomerate bonds remain completely intact.
2. High-Speed Internal Intensifier Bar (De-Agglomerator)
While tumbling motion handles free-flowing powders effortlessly, cohesive materials with high moisture or static charges often form soft lumps that gentle gravity tumbling cannot shatter.
POLYC offers an optional high-speed Intensifier Bar mounted axially through the hollow drive trunnions. Powered by an independent auxiliary motor at $1,000\text{--}1,500\,\text{rpm}$, the intensifier bar features staggered pins or cross-knives. As powder cascades through the center zone during cone rotation, the high-speed pins break agglomerates instantly and disperse minor liquid additions without over-processing the overall batch.
3. Brake Motor Auto-Indexing & Optical Safety Enclosures
A large rotating double cone creates significant rotational inertia and requires precise positioning for operator loading and discharge.
POLYC blenders feature high-torque electromagnetic brake motors governed by variable frequency drives (VFD) and laser positioning sensors. The control console features an automatic indexing function that halts the vessel perfectly vertical with the manway facing upward for charging, or inverted $180^\circ$ with the discharge valve facing downward. An integrated stainless steel safety fence with optical light curtains immediately stops rotation if an operator enters the operating envelope.
4. Zero-Dead-Leg Rotary Butterfly Valve & Complete Discharge
Cleaning efficiency is paramount in pharmaceutical and food applications subject to strict cross-batch validation audits.
The symmetrical $60^\circ$ cone slope exceeds the angle of repose for virtually all industrial dry powders. At the lower cone apex, POLYC fits a precision sanitary stainless steel butterfly valve equipped with a food-grade silicone or PTFE seal. When open, material discharges completely by gravity without bridging or heel residue. Internal surfaces feature continuously welded, radius-blended corners polished to $Ra \le 0.4\,\mu\text{m}$ (optional electro-polish $Ra \le 0.2\,\mu\text{m}$), allowing rapid visual inspection and spray-ball CIP sanitization.
What Factors Drive the Price of a Double Cone Blender?
When evaluating commercial equipment proposals for double cone rotary blenders, total quotation figures reflect four primary engineering specifications:
1. Metallurgy & Sanitary Surface Polishing ($Ra$)
Standard industrial SUS304 represents the baseline for chemical additives and plastics. Upgrading to pharmaceutical-grade SUS316L with sanitary electro-chemical mirror polishing ($Ra \le 0.2\,\mu\text{m}$) and full weld ground-flush passivation adds to specialized robotic grinding and cleanroom fabrication costs.
2. Vessel Capacity & Structural Stand Rigidity
Equipment pricing scales with vessel volume — from compact 100L/300L pilot units up to 3,000L to 5,000L+ plant-scale machines. Larger models require massive structural A-frame pedestals, heavy forged drive trunnions, and high-torque helical gear reducers engineered to handle high dynamic moment loads.
3. Internal Intensifier Bar & Liquid Injection
A plain double cone without internal agitators represents the most economical configuration. Adding an internal high-speed intensifier bar requires hollow trunnions, dual-speed drive motors, high-pressure rotary joints for liquid spray injection, and specialized dynamic mechanical seals, increasing overall capital cost.
4. Explosion Safety, Automation & cGMP Qualification
Handling combustible powders (such as starch, fine chemicals, or metal dusts) demands ATEX Zone 21/22 flameproof drive motors, static grounding brushes, safety interlock fences, and complete cGMP DQ/IQ/OQ/PQ validation qualification documentation.
Why Choose POLYC for Double Cone Blenders?
Cone rolling, precision trunnion alignment, and rotational balance testing at POLYC's 9,000 m² Wuxi manufacturing plant.
🏭 Real Direct Manufacturing & Turnkey Powder Engineering
Shanghai Polyc Technology Co., Ltd. fabricates all W-Series double cone blenders, structural stands, and pneumatic discharge systems inside our wholly-owned 9,000 m² production facility in Wuxi, Jiangsu Province. Sourcing directly eliminates intermediary markups, connects your technical directors directly with machine designers, and ensures strict ISO9001 and CE compliance.
🤝 3-Year Global Warranty & Priority Air-Express Parts
All genuine POLYC double cone mixers include our standard 3-Year Global Warranty covering structural frames, drive shafts, gearboxes, and electric motors. We stock replacement sanitary silicone seals, butterfly valve discs, and brake pads for priority international air-express dispatch within 3 to 5 business days.
🧪 Free Material Blending & Friability Testing
Unsure of the optimal cone rotational speed, cycle time, or whether an intensifier bar is needed for your formulation? Send a 10L to 20L bulk sample to our Wuxi pilot testing facility. Our chemical engineers will run trials on our pilot double cone mixers, delivering complete particle size distribution (PSD) and blend uniformity ($CV$) reports before you finalize equipment sizing.
Ready to Specify Your Industrial Double Cone Blender?
Share your dry material properties (bulk density, particle size, friability, moisture content), target batch volume (liters or kg), and workshop voltage standards with our Wuxi engineering desk — we will deliver an optimized proposal and direct factory quote within 24 hours.
Frequently Asked Questions
How does a double cone blender achieve high uniformity without shear damage?
What is the optimal working fill level for a double cone blender?
When is an optional internal Intensifier Bar (De-agglomerator) necessary?
How does the machine stop precisely in the upright or inverted position?
What is the difference between a Double Cone Blender and a V-Blender?
What engineering factors determine the quotation of an industrial double cone blender?
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