Product details
The SJ180/38 Single Screw Extruder is a specialized industrial machine designed for the high-efficiency production of HDPE (High-Density Polyethylene) sheets, plates, and other plastic sheeting applications. Below is a detailed technical description based on industry-standard specifications for this class of equipment
1. Core Function & Application The extruder is engineered to process HDPE granules into uniform sheets with precise thickness and dimensional accuracy. It supports a wide range of plastic materials, including HDPE, PP, PVC, ABS, and composite blends (e.g., WPC), making it versatile for industries such as construction, packaging, automotive, and manufacturing. Construction waterproof materials is typical end-use applications. Geomembranes, geocells, and waterproofing sheets. Custom plastic sheets for thermoforming or further processing.
2.Key Components
Screw & Barrel: Made from 38CrMoALA alloy steel with nitriding treatment for wear resistance and long service life.
Drive System: Precision gear reducer + high-efficiency motor for consistent screw rotation.
Heating/Cooling: Multi-zone electric heating bands (12-16 zones) with PID temperature control (±1°C accuracy) for uniform melt temperature.
Automation: Optional PLC-based control system for automated start/stop, parameter monitoring, and fault diagnostics.
3.
The SJ180/38 extruder is typically part of a complete HDPE sheet
Feeding System: Vacuum auto-loader + hopper dryer for consistent material feeding and moisture removal.
Extrusion Unit: Main single-screw extruder (SJ180/38) with die head for initial sheet shaping.
Calendering System: Three-roller calender for thickness uniformity and surface finish optimization.
Pulling & Cutting: Haul-off machine (tractor) for controlled sheet tension, paired with longitudinal/traverse cutters for precise sizing.
Stacking & Discharge: Automatic stacking system for finished sheets.





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Step 1
Payment and order readiness
Minimum order: 1 Units
Payment terms, specifications, and order details are confirmed before preparation begins.
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Step 2
Preparation
90 days
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Step 3
Packaging and dispatch
Ocean freight via Maersk · Approx. shipping fee: $ 0.84 for 1 unit · Transit time: Est. 17-24 days
Final packing, freight, and delivery dates are confirmed before dispatch.
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