On-Site Installation Update: 75D Twin-Screw Compounding Line For High-Calcium PP Filler Masterbatch
On-Site Installation Update: 75D Twin-Screw Compounding Line for High-Calcium PP Filler Masterbatch
Release Date: June 23, 2026
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Our workshop installation team has finished the full assembly of a brand-new 75D co-rotating twin-screw pelletizing line, which is specially configured for producing PP compound filled with 87% calcium carbonate powder. This complete line adopts a professional layout customized for ultra-high mineral filler formulations, with all mechanical, electrical and auxiliary systems fully installed and ready for upcoming trial runs.
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Full Line Standard Configuration
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1. Main Extruder Unit: 75D twin-screw extruder, matched with 220kW high-torque drive motor. The modular screw combination is optimized for large-volume calcium carbonate feeding, stable plasticization and uniform dispersion without material bridging or screw clinging.
2. Feeding System: Conical twin forced feeder. This heavy-duty feeding structure solves the common feeding fluctuation issue caused by high-proportion loose mineral powder, delivering consistent and stable material supply to the main barrel.
3. Pelletizing & Post-Treatment System: Water ring hot cutting unit paired with water cooling vibrating sieve. After cutting, pellets go through water bath cooling, then the vibrating sieve separates finished pellets from fine powder and excess water, ensuring clean, dry, uniform round filler masterbatch pellets.
Workshop Installation Progress & Highlights
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The whole installation work was completed within scheduled construction cycles. Our technical crew finished base positioning, unit alignment, pipeline wiring, cooling circuit connection and control cabinet debugging step by step. Every connection point of the feeding, extrusion and cutting sections was strictly calibrated to eliminate leakage, vibration and unstable feeding risks that frequently occur in high-filler production.
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For formulas containing up to 87% calcium carbonate, stable feeding and full dispersion are the core production challenges. The matched conical twin forced feeder effectively presses fluffy powder into the extruder barrel, avoiding empty running or material slip. The 220kW powerful motor provides sufficient torque to handle high-viscosity melt with massive mineral fillers, maintaining steady pressure and temperature across all barrel zones.
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The water ring cutting and vibrating sieve post-processing system is tailored for high-filler pellets. It prevents pellets from sticking together after cutting, removes fine powder debris generated during compounding, and greatly improves finished pellet appearance and cleanliness, which helps downstream manufacturers get stable product performance.
Next Step
After a short electrical inspection and parameter pre-setting, our engineers will launch full load trial production with PP + 87% calcium carbonate formula, recording real-time hourly output, melt status and pellet quality data. We will release detailed trial run data after formal testing, to share practical high-filler compounding reference for global plastic modification manufacturers.
This new 75D complete line expands our real production test capacity for ultra-high filling masterbatch, enabling us to provide more reliable machine configuration and process technical support for customers engaged in calcium carbonate filler masterbatch production.
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