Case Study: 1,800L Vertical Fountain Blender for Plastic Pellet Homogenisation
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The Challenge: Achieving Batch Uniformity in Plastic Tank Production
A plastic tank manufacturing facility required a high-capacity solution to blend large volumes of plastic pellets and additives. To ensure consistent product quality and structural integrity in their rotationally moulded or extruded tanks, the plant needed to achieve a perfectly homogeneous mix of virgin polymers, regrind, and masterbatch pigments before the material entered the production line.
A plastic tank manufacturing facility required a high-capacity solution to blend large volumes of plastic pellets and additives. To ensure consistent product quality and structural integrity in their rotationally moulded or extruded tanks, the plant needed to achieve a perfectly homogeneous mix of virgin polymers, regrind, and masterbatch pigments before the material entered the production line.
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The Solution: High-Efficiency Vertical Mixing Silo
We supplied a robust Vertical Fountain Blender with a useful capacity of 1,800 litres, specifically engineered for bulk solid mixing:
We supplied a robust Vertical Fountain Blender with a useful capacity of 1,800 litres, specifically engineered for bulk solid mixing:
- Integrated Vertical Auger: The core of the system is an internal vertical mixing screw (auger). This screw continuously lifts material from the base of the silo to the top, where it is dispersed in an “umbrella” pattern back down to the bottom.
- Cyclical Homogenisation: This “fountain” effect creates a continuous recirculation loop. By moving the entire 1,800L batch through this vertical cycle, the mixer eliminates stratification and ensures a uniform distribution of pigments and additives throughout the pellets.
- Space-Saving Footprint: The vertical design provides a massive mixing volume while occupying minimal floor space, allowing it to be easily integrated into existing plant layouts alongside storage silos and processing machinery.
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The Result: Consistent, High-Quality Polymer Blends
The vertical silo mixer transformed the facility’s material preparation process. By automating the homogenisation of the plastic granules, the plant achieved a stable melt index and colour consistency across every production run, significantly reducing scrap rates and recalibration time between batches.
The vertical silo mixer transformed the facility’s material preparation process. By automating the homogenisation of the plastic granules, the plant achieved a stable melt index and colour consistency across every production run, significantly reducing scrap rates and recalibration time between batches.
Mixing Silo – Technical Specifications Table
| Specification | Technical Details |
|---|---|
| System Type | Vertical Mixing Silo / Fountain Blender |
| Useful Capacity | 1,800 Litres |
| Mixing Mechanism | Internal Vertical Screw (Auger) |
| Mixing Action | Fountain-style cyclical recirculation |
| Material Handled | Plastic Pellets, Granules, & Regrind |
| Industry Application | Plastic Tank Production & Recycling |
| Construction | Heavy-Duty Industrial Steel |
| Key Advantage | High-volume batch uniformity with a small footprint |
Handling Diverse Material Densities: Masterbatch & Regrind Integration
One of the primary challenges in plastic manufacturing is the tendency for different materials—such as heavy virgin pellets, light regrind, and dense masterbatch pigments—to separate or “stratify.”
- Anti-Stratification Technology: Our Fountain Blender is specifically designed to overcome these density differences. The high-speed vertical auger creates a mechanical “lift” that forces all components, regardless of their specific gravity, into a single homogeneous stream.
- Masterbatch Dispersion: By recirculating the entire 1,800L batch multiple times, the system ensures that colour pigments are evenly coated across the base polymer, eliminating “streaking” or colour variations in the final moulded plastic tanks.