**Two-Stage Extrusion Machine for Compounding PVC Masterbatch**
**Model No.:** SP75/180
**Engagement System:** Full Intermeshing
**Screw Channel Structure:** Deep Screw
**Exhaust:** Yes
**Automation:** Fully Automatic
**Computerized:** Yes
**Place of Origin:** Jiangsu, China
**Model:** SP-75/180
**Brand:** Nanjing Haisi
**Power:** 90–110/45–55 kW
**Materials Processed:** PVC, High Filler Masterbatch
**Capacity:** 500–800 kg/h
**Warranty:** 1 Year
**After-Sales Service:** Engineers available overseas to service the machine
**Screw Rotational Speed:** 65–85 rpm; 400–600 rpm
**L/D Ratio:** 7–20; 24–48
**Trademark:** Nanjing Haisi
**Transport Package:** Neutral Packing
**Specification:** CE, ISO9001, SGS
**Origin:** Nanjing, Jiangsu
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**Application**
The SP-75/180 is a two-stage extrusion system designed specifically for high filler masterbatch, soft and rigid PVC applications such as pipes, wires, and other plastic products. This machine is ideal for compounding PVC with calcium carbonate (CaCO3) and other fillers.
**Features**
The first stage uses a TSE twin-screw extruder without a die. It is optimized for processing thermosensitive materials like PVC, offering excellent melting, compounding, dispersion, and deagglomeration under low pressure conditions. The second stage is a single-screw extruder (SJ180), which operates at a lower speed, ensuring steady melting, long-term compounding, and strand formation while avoiding overheating.
**Granulating Line**
An air-cooled hot face pelletizing line is used for high filler masterbatch, ensuring efficient and stable granulation.
**About Our Company**
Nanjing Haisi Extrusion Equipment Co., Ltd. is a high-tech enterprise specializing in R&D, design, manufacturing, and sales of extrusion equipment. With years of experience in the extrusion industry, we focus on producing high-performance single screw, twin screw, and compounding extruders. We also offer complete plant solutions and turn-key projects. Our product range includes single screw extruders, co-rotating twin screw compounding extruders, and related auxiliary equipment. We are committed to providing high-quality service and reliable performance.
**Technical Specifications**
| Model | Screw Diameter (mm) | L/D Ratio | Screw Rotation (rpm) | Main Power (kW) | Output (kg/h) |
|-------------|---------------------|----------------|-----------------------|------------------|----------------|
| SP75-180 | TSE-75A | 24–48 | 400–500 | 90–110 | 300–600 |
| | SJ180 | 7–20 | 65–85 | 45–55 | |
This two-stage extrusion system ensures efficient and high-quality production of PVC masterbatches, making it a reliable choice for manufacturers looking for precision, durability, and performance.
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