**High Capacity Two-Stage Extruder for High Filler CaCO3 Masterbatch**
This high-capacity two-stage extruder is specifically designed for the production of CaCO3 filler masterbatches, offering superior performance and efficiency. It combines a twin-screw extruder in the first stage with a single-screw extruder in the second stage, ensuring optimal mixing, melting, and forming processes.
**Key Specifications:**
- **Model NO.:** SP65-150
- **Engagement System:** Full Intermeshing
- **Screw Channel Structure:** Deep Screw
- **Exhaust:** Yes
- **Automation:** Automatic
- **Computerized:** Yes
- **Screw Diameter:** 62.4 / 150 mm
- **L/D Ratio:** 24–48; 7–20
- **Screw Rotational Speed:** 400–500; 65–85 rpm
- **Motor Power:** 55–75 kW; 37–45 kW
- **Capacity:** 350–550 kg/hr
- **Screw Element Mode:** Segment
- **Application:** CaCO3 Filler Masterbatch
- **Trademark:** Haisi
- **Transport Package:** Wooden Case
- **Specification:** 4.8m × 0.67m × 2.2m
- **Origin:** Nanjing, Jiangsu
- **HS Code:** 8477201000
**Technical Features:**
The first stage utilizes an SHJ twin-screw extruder without a die, enabling efficient melting, compounding, and dispersion of thermosensitive materials like PVC under no backpressure conditions. The second stage uses a single-screw extruder (SJ) with a lower rotational speed, which ensures stable melting, long-term compounding, and consistent strand formation, preventing overheating.
**Applications:**
This extruder is ideal for a wide range of materials, including:
- **Mixing Nature-Changing:** PE, PP, PS + SBS, PA + EPDM, PP + NBR, EVA + Silicon rubber
- **Filling Nature-Changing:** PE, PP, EVA, etc. + Calcium carbonate, talcum powder, titanium powder
- **Functional Pellets:** PP, PA, ABS, PBT, etc. + anti-burning agents and other additives
- **Biodegradable Pellets:** PE, PP, PS, etc. + starch
- **Dual-Prevention Pellets:** PE + fog-preventing dipper, stabilizer
- **Black Pellets:** PE, EVA, ABS, etc. + carbon black
**Technical Data Table:**
| Model | First Stage (SHJ) | Screw Diameter (D mm) | L/D | Screw Rate (N rpm) | Motor Power (P kW) | Capacity (Q kg/h) |
|-------------|-------------------|------------------------|---------|--------------------|--------------------|-------------------|
| SP50-120 | SHJ50 | 50.5 | 24–48 | 500 | 37–45 | 150–300 |
| SP65-150 | SHJ65 | 62.4 | 24–48 | 400–500 | 55–75 | 200–500 |
| SP75-180 | SHJ75 | 71 | 24–48 | 400–500 | 90–110 | 300–600 |
| SP95-200 | SHJ95 | 93 | 24–48 | 300 | 160–220 | 500–1000 |
This two-stage extrusion system is widely used in industries that require high-quality masterbatches, especially in the plastics and polymer processing sectors. Its advanced design ensures high productivity, energy efficiency, and reliable performance, making it a top choice for manufacturers looking to enhance their production capabilities.
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