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China Twin-Screw Plastic Extruder Factory: PVC Processing Equipment for Suppliers and Manufacturers

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Application & Features
The SJSZ series conical twin-screw extrusion machine, manufactured by leading China suppliers, is designed for the extrusion of various thermoplastics into products such as tubes, sheets, boards, films, and profiles. With the appropriate screw and auxiliary components, this versatile machine is also ideal for the modification of plastics and pelletizing of powders. Equipped with an AC motor, it offers infinite speed variation via a frequency converter, along with overload protection and trouble alarms. The design includes features such as constant oil temperature in the screw, oil cooling in the barrel, vacuum exhausting devices, and fixed quantity feeding, ensuring efficient operation in any factory setting.

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    Main Technical Parameters

    Model SJSZ45 SJSZ55 SJSZ65 SJSZ80 SJSZ92
    Diameter of screws (mm) 45/90 55/110 65/120, 65/132 80/156 92/188
    Quantity of screws 2 2 2 2 2
    Rotation of screws Outward in different direction
    Rotate speed of screws (r/min) 1-37 1-40 1-35.7 1-36.9 1-37.5
    Effective length of screws (mm) 1065 1200 1440 1800 2185
    Main motor (kw) 22 22 37 55 110
    Barrel heating power (kw) 10 18 24 36 68
    Production capacity (kg/h) 110 150 250 450 750
    Centre height of machine (mm) 1000 1000 1000 1000 150
    Net weight (kg) 2500 3500 4000 5000 7000
    Appearance size (L*W*H) (mm) 3235*1100*2157 3620*1050*2157 4235*1520*2450 4750*1550*2460 6500*1800*2500

    Working Principle

    The twin-screw extruder operates via two intermeshing or counter-rotating screws, which convey raw materials from the feed inlet into the barrel. During the rotation of the screws, they not only transport the materials but also, through the heating of the barrel and the shearing and kneading effects of the screws, gradually melt and plasticize the raw materials to form a uniform melt. The synergistic effect of the twin screws enhances the material mixing and shearing efficiency, preventing local overheating or uneven plasticization. Subsequently, the melt is continuously pushed to the head mold by the thrust of the screws and extruded into shape according to the cavity form of the mold, meeting the processing needs of different products and adapting to the continuous processing process of various materials.

    Product Features

    It has strong material mixing and plasticizing capabilities, capable of processing raw materials with complex properties such as high filling and high viscosity, and is suitable for processing in multiple fields including plastics, rubber, and composite materials. It adopts a precise temperature control and screw speed adjustment system to ensure stable product quality and reduce production fluctuations. With a compact structural design, it operates with low noise, and key components are made of wear-resistant materials to extend the service life of the equipment. It has a high degree of automation integration and can be linked with auxiliary equipment such as feeding, cooling, and cutting devices to simplify the production process. Meanwhile, it requires no complex operations, reduces reliance on manual labor, and improves overall production efficiency.

    Quality and Service

    Brand Cooperation

    • Siemens PLC
    • ABB frequency converter
    • Schneider air switch contactor

    Service Commitment

    • Pre-sales: Customized scheme design
    • After-sales:
    • (1) Production capacity guarantee: Delivery time is divided into 30, 60, 90 and 120 days according to the project scale.
    • (2) Warranty Policy: 1-year free warranty, one-to-one service, 7*24-hour response.
    • (3) Technical support: Installation guidance, remote diagnosis.
    • (4) Training service: Operation/maintenance training.

    Frequently Asked Questions (FAQ)

    What materials can the SJSZ series twin-screw extruder process?

    The SJSZ series twin-screw extruder is designed with strong mixing and plasticizing capabilities. It is highly capable of processing raw materials with complex properties, including high filling and high viscosity, making it suitable for plastics, rubber, and various composite materials.

    How does the twin-screw system prevent uneven material plasticization?

    By utilizing two intermeshing or counter-rotating screws combined with barrel heating, the extruder exerts high shearing and kneading effects. This synergistic action enhances mixing efficiency and prevents local overheating, ensuring a uniform melt.

    Which premium component brands are configured in this machinery?

    To ensure high reliability and stable performance, we cooperate with world-class brands including Siemens PLC control systems, ABB frequency converters, and Schneider air switch contactors.

    What is the delivery time and warranty policy for the SJSZ series?

    Delivery time varies between 30, 60, 90, and 120 days depending on the project scale. We offer a 1-year free warranty, one-to-one dedicated service, and a 7*24-hour rapid response system.

    Do you provide installation guidance and operator training?

    Yes, our service commitment includes comprehensive technical support such as installation guidance and remote diagnosis, alongside operation and maintenance training services to simplify your production process.

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