**Two-Stage Extrusion Machine for Compounding PVC Masterbatch**
**Model No.:** SP75/180
**Engagement System:** Full Intermeshing
**Screw Channel Structure:** Deep Screw
**Exhaust:** Yes
**Automation:** 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 to service the machine overseas
**Screw Rotational Speed:** 65–85 rpm; 400–600 rpm
**L/D Ratio:** 7–20; 24–48
**Trademark:** Nanjing Haisi
**Transport Packaging:** Neutral Packing
**Certifications:** CE, ISO9001, SGS
**Origin:** Nanjing, Jiangsu
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**Application**
The SP-75/180 two-stage extrusion machine is specifically designed for high filler masterbatch, soft PVC, and rigid PVC processing. It is widely used in the production of pipes, wires, and other plastic products. The system combines a twin-screw extruder with a single-screw extruder for efficient compounding and granulation.
**Features**
The first stage is a TSE twin-screw extruder without a die, which is ideal for melting, compounding, dispersing, and decentralizing thermosensitive materials like PVC under low-pressure conditions. The second stage uses an SJ single-screw extruder, which operates at a lower speed to ensure stable melting, longitudinal compounding, and strand formation while avoiding overheating.
**Granulating Line**
An air-cooled hot-face pelletizing line is used for high filler masterbatch, ensuring efficient cooling and consistent pellet quality.
**About Our Company**
Nanjing Haisi Extrusion Equipment Co., Ltd. is a high-tech enterprise specializing in R&D, manufacturing, sales, and services in the extrusion industry for many years. We focus on producing high-performance single-screw and twin-screw extruders, as well as complete plant solutions and turnkey projects. Our product range includes single-screw extruders, co-rotating twin-screw compounding extruders, and auxiliary equipment. We are committed to providing high-quality service and reliable machinery to our global customers.
**Technical Specifications**
| Model | Screw Diameter (mm) | L/D | Screw Rotation (rpm) | Main Power (kW) | Output (kg/h) |
|--------------|---------------------|-----------|----------------------|------------------|----------------|
| SP75-180 | TSE-75A | 71 | 400–500 | 90–110 | 300–600 |
| | SJ180 | 180 | 65–85 | 45–55 | |
This two-stage extrusion system is an ideal choice for manufacturers looking to produce high-quality PVC masterbatches efficiently and cost-effectively.
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