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SJ-150
HS
Product Overview
Nanjing Haisi Extrusion Equipment Co., Ltd. offers the highly efficient SJ-150 kneader single screw compounding and pelletizing production line. This equipment is specifically engineered for processing highly filled masterbatches. This advanced two-stage extrusion system perfectly combines high-intensity intensive mixing with stable single-screw pressure extrusion, delivering excellent dispersion for formulas with extremely high inorganic powder loading.
Advanced Process Configuration
The production line features a seamless, automated two-stage design to maximize compounding efficiency:
High-Efficiency Pre-Stage Kneader: Raw materials and high-percentage fillers are intensively sheared and mixed in the closed chamber of the kneader, achieving optimal micro-dispersion and polymer wetting.
Conical Twin-Screw Side Feeder: The hot compounded mass from the kneader drops directly into the conical twin-screw side feeding unit. This unit forces the material uniformly into the single screw extruder, completely eliminating bridging or clogging issues common in traditional feeders.
SJ-150 Single Screw Extruder: Featuring an optimized profile for high-filler formulas, the extruder handles steady pressure building, cooling, and extrusion without causing material degradation.
New Type Water-Ring Pelletizing System: Equipped with an upgraded water-ring die-face cutter. The precise blade-to-die alignment combined with an optimized water circulation system ensures high-efficiency cooling and perfectly uniform, non-stick granule production.
Technical Advantages
Massive and Stable Output: The heavy-duty SJ-150 processing system delivers a reliable, high-volume production capacity of 600 to 700 kg/h, drastically lowering energy consumption per ton.
Superior High Loading Capacity: Leveraging the intensive mixing power of the kneader, this line easily processes compounding formulas with exceptionally high ratios of inorganic fillers.
Continuous Fully Automated Operation: The entire chain from kneading to feeding, extrusion, and pelletizing operates in a synchronized closed loop, maximizing factory floor efficiency.
Typical Applications
This heavy-duty granulation line is ideal for manufacturing:
Highly filled PE and PP Calcium Carbonate (CaCO3) masterbatches
Talc filled functional masterbatches
Barium Sulfate (BaSO4) high-density compounding
Highly concentrated flame-retardant masterbatches
Contact Us
Contact the Nanjing Haisi sales engineering team today to receive your tailored technical drawings and quotation for high-capacity compounding solutions.
A: High-filler compounding requires a division of processing duties to achieve high output without degrading the material. The primary Kneader stage provides intense dispersive mixing and kneading at high shear to thoroughly incorporate inorganic powders (like calcium carbonate or talc). The secondary SJ 150 single screw stage handles low-shear conveying, melt cooling, and pressure build-up before the die plate. This two-stage setup prevents thermal degradation and ensures smooth, continuous extrusion.
A: High-filler formulations (such as 70% to 85% CaCO3/Talc loading) drastically reduce the melt strength of the polymer, making extruded strands extremely brittle and prone to constant breakage in water troughs. Water ring pelletizing cuts the molten material directly at the hot die face, eliminating the need for continuous strands. This prevents production interruptions, saves floor space, and guarantees highly uniform, dust-free pellets.
A: This robust compounding line is specifically optimized for ultra-high filler loadings. Depending on the base carrier resin (such as PP, PE, or EVA) and the particle size of the powder, the system can reliably process high-density inorganic filler masterbatches with loading rates ranging from 50% up to 85%.
A: Once the Kneader has completed the heavy dispersion work, the molten mixture enters the SJ 150 single screw extruder. Running at a lower rotational speed, the single screw gently cools the melt, stabilizes internal pressure, and pushes the compound through the screen changer. Because it introduces minimal additional friction heat, it protects the polymer carrier from thermal breakdown and maintains stable color and viscosity.
A: Our updated water ring system features precision-aligned rotary cutters and an optimized water flow channel. The high-speed cutting blades make clean contact with the die plate, while the circulating water ring immediately cools the freshly cut pellets, preventing them from sticking together. The system is fully enclosed, automated, and easy to clean during recipe or color changeovers.
A: Inorganic powders like calcium carbonate and talc are inherently abrasive. To guarantee long-term operational stability, the Kneader mixing elements, the SJ 150 screw flights, and the barrel liners are crafted from high-grade bimetallic alloys and specialized hardened tool steels. These anti-wear treatments significantly prolong component lifespan and lower maintenance overhead.
