Optimized SJ60/38 Screw Configuration
Optimized screw design improves plasticizing stability.
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Product Details
SJ60/38 Single Screw Extruder is designed for HDPE gas and water pipe extrusion applications requiring stable melt pressure, precise wall thickness control and efficient plasticization. The 38:1 long L/D barrier screw supports superior homogenization for virgin and recycled HDPE materials.
Materials to be processed
HDPE / PP materialRaw Material
180-300 KG/HrOutput Capacity
SJ60/38Extruder Model
75 KW SIMOMain Motor
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Core Advantages
Reliable & Powerful Driving System
Reliable drive control keeps operation stable.
Wide & Stable Production Capacity
Stable output supports efficient continuous production.
Intelligent Siemens PLC Control
Stable output supports efficient continuous production.
High-Grade Brand Electrical Components
Reliable drive control keeps operation stable.
Consistent Product Quality & Lower Cost
Optimized screw design improves plasticizing stability.
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The Production Line Consists Of
Single Screw Extruder
The SJ60/38 features a single screw design known for simple and effective melting and mixing. The 60mm screw diameter and 38:1 L/D ratio provide excellent processing capability for a wide range of polymers.
Vacuum Loader
The integrated vacuum loader system automatically conveys raw materials from storage bins to the extruder hopper, minimizing manual handling and reducing dust or moisture contamination.
Hopper Dryer
The hopper dryer removes moisture from hygroscopic materials before they enter the extruder. Temperature control and airflow management help maintain stable material condition and final product quality.
Gravimetric Weighing System
The gravimetric weighing system accurately measures and controls material feed rate, helping maintain precise dosing, formulation consistency and real-time linkage with the extruder control system.
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Technical Parameters
| Extruder Model | Main Motor Power | Barrel Heating Power | Max. Rotating Speed | Max. Output |
|---|---|---|---|---|
| SJ45/33 | 30 KW | 12 KW | 118 RPM | 60~100 KG/H |
| SJ50/33 | 37 KW | 15 KW | 118 RPM | 80~120 KG/H |
| SJ60/33 | 55 KW | 14 KW | 130 RPM | 100~200 KG/H |
| SJ60/38 | 75 KW | 19 KW | 148 RPM | 180~300 KG/H |
| SJ65/33 | 55 KW | 20 KW | 150 RPM | 180~220 KG/H |
| SJ75/36 | 132 KW | 35 KW | 150 RPM | 350~450 KG/H |
| SJ75/38 | 160 KW | 35 KW | 165 RPM | 350~450 KG/H |
| SJ90/33 | 185 KW | 40 KW | 120 RPM | 450~550 KG/H |
| SJ90/38 | 250 KW | 40 KW | 165 RPM | 800~900 KG/H |
| SJ120/38 | 355 KW | 72 KW | 165 RPM | 1200~1400 KG/H |
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Factory Strength
20+Years Experience
20MAnnual Sales
72hPre-delivery Test
CE & ISOCertified Machines
Integrated factory and exporter with independent R&D, mould machining, complete machine inspection, and overseas commissioning support.
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Delivery & Container Loading
Polestar Machinery arranges machine packing, container loading checks, and export delivery coordination for plastic extrusion lines and auxiliary equipment.
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Customer Projects
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Frequently Asked Questions
Q1: What is the model of your single screw extruder? What does SJ60/38 mean?
SJ60/38 means the screw diameter is 60mm and the L/D ratio is 38:1. This long L/D design is suitable for HDPE water and gas pipe production.
Q2: What materials can this extruder process?
It is mainly used for HDPE, MDPE, PE100 and PE80 raw pellets. It is also compatible with PP, clean recycled PE scraps and PE with carbon black or calcium carbonate filler.
Q3: Which pipe sizes match the SJ60/38 extruder?
It is suitable for HDPE pipe OD 63mm to 250mm water supply and gas pipeline production, and can also be used for thick PP sheet and hollow grid board production.
Q4: What is the maximum output capacity of SJ60/38?
Stable continuous output is 180-300 kg/h for HDPE PE100 virgin material.
Q5: How do you guarantee stable melt pressure and pipe wall thickness?
The screw ensures uniform plasticization and stable melt pressure. The system can support online gravimetric wall thickness control linkage and closed-loop screw speed adjustment.
Q6: Does the long L/D 38:1 screw cause material degradation?
No. The barrier screw uses a mild shear design with slow temperature rise, supporting low-temperature extrusion and stable HDPE pipe quality.
Q7: How much recycled raw material can be added?
Up to 30% clean crushed PE pipe regrind can be added without reducing pipe physical performance. Impure, wet or polluted recycled material is not recommended.
Q8: What material are the screw and barrel made of?
Standard screw and barrel use 38CrMoAlA alloy steel with deep nitriding treatment. Bimetallic screw and barrel are optional for high calcium carbonate filling production.
Q9: What is the service life of the standard nitrided screw and barrel?
For normal HDPE virgin material, service life is typically 4-5 years under continuous 24-hour operation.
Q10: How about barrel heating and cooling temperature accuracy?
The barrel uses segmented cast aluminum heaters with forced air cooling and independent spiral water cooling at the feeding section. Temperature control accuracy is about +/-1C.