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Plastic Extruders
  • Factory Direct Sales SJ25 Small Mini Laboratory Single Screw Plastic Extruder
  • Factory Direct Sales SJ25 Small Mini Laboratory Single Screw Plastic Extruder
  • Factory Direct Sales SJ25 Small Mini Laboratory Single Screw Plastic Extruder
  • Factory Direct Sales SJ25 Small Mini Laboratory Single Screw Plastic Extruder
  • Factory Direct Sales SJ25 Small Mini Laboratory Single Screw Plastic Extruder
  • Factory Direct Sales SJ25 Small Mini Laboratory Single Screw Plastic Extruder
Factory Direct Sales SJ25 Small Mini Laboratory Single Screw Plastic Extruder

Factory Direct Sales SJ25 Small Mini Laboratory Single Screw Plastic Extruder

  • 1 - 1 Sets
    $1,600
  • >= 2 Sets
    $1,000

Customization:

Customized logo（Min.Order: 1 pieces）
Customized packaging（Min.Order: 1 pieces）
Graphic customization（Min.Order: 1 pieces）
View product details

Factory Direct Sales SJ25 Small Mini Laboratory Single Screw Plastic Extruder

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Material Processing: Capable of extruding a wide range of thermoplastics including PVC, ABS, PP, PC, PE, WPC, and XPS through a high-performance single-screw system (L/D ratio 25:1).
  • Product Formation: Designed to produce plastic profiles, pipes, films, and other molded components via interchangeable die heads, enabling versatile output customization.

Key features

  • 1. Advanced Material Technology for Durable Performance

    • With a corrosion-resistant 38CrMoAlA alloy screw, you can ensure long-lasting durability and efficient processing of demanding materials like PVC, ABS, and PC. The stainless steel/aluminum construction resists wear, maintaining precision even in high-volume production.

  • 2. Precision Control for Customized Outputs

    • Equipped with a digital control panel and programmable presets, you can achieve precise temperature and speed adjustments for consistent extrusion results. This interactive design simplifies automation, reducing manual intervention in R&D or small-batch production.

  • 3. High Efficiency via 25:1 L/D Ratio Screw

    • With a 25:1 screw length-to-diameter ratio, you can achieve superior mixing and output stability compared to standard 20:1 ratios*, enabling smoother production of complex profiles like pipes or films.

  • 4. Versatile for Lab to Light Commercial Use

    • Designed for small-scale labs or workshops, this extruder handles materials like WPC and XPS while supporting continuous operation for commercial applications. Its compact size offers space efficiency without compromising output quality.

  • 5. Compliance with EU Safety Standards

    • Certified to 2006/42/EC, you can ensure compliance with EU machinery safety regulations, making it trusted for use in regulated environments. The robust safety features, including interlocks, further protect operators during use.

Product details

Factory Direct Sales SJ25 Small Mini Laboratory Single Screw Plastic Extruder

The SPIRE SJ25 Small Mini Laboratory Single Screw Plastic Extruder is a compact, high-performance machine designed for precise plastic extrusion in laboratory or small-scale production environments. Certified to 2006/42/EC standards, it processes materials like PVC, ABS, PP, PC, PE, and WPC with a robust 38CrMoAlA alloy screw (L/D ratio 25:1) for efficient melting and homogenization. Its modular design and safety features make it ideal for R&D, prototyping, and low-volume manufacturing.

Technical specifications

FeatureSpecificationBenefit
Certification2006/42/ECEnsures compliance with EU machinery safety standards
Extruder TypeSingle ScrewSimplifies maintenance and reduces downtime
Material CompatibilityPVC, ABS, PP, PC, PE, WPCVersatile for diverse plastic applications
Screw Specifications38CrMoAlA alloy, 25:1 L/D ratioHigh durability and optimal material mixing
Voltage380V, 3-phaseCompatible with industrial power standards
Warranty1 yearComprehensive coverage for peace of mind

Customization guide

Adjustable parameters include screw speed (0-50 rpm) and temperature zones (up to 300°C) to tailor processing for specific materials. The modular design allows swapping of die heads or screw configurations to meet specialized needs, such as extruding thin films or complex profiles.

Get inspired

Ideal for labs and startups, the SJ25 enables rapid prototyping of plastic profiles, films, or pipes. Its compact footprint and precise controls make it perfect for testing new formulations or scaling production without sacrificing quality.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Max Screw Speed50 rpm+15% (58 rpm)+30% (65 rpm)*
Temperature Zones3 zones5 zones7 zones
Automation LevelManual controlSemi-automatedFully automated
Material Throughput5-15 kg/h10-25 kg/h20-40 kg/h

*Pro Model’s speed improvement enables 20% faster production than traditional lab extruders.

Supplier's note

  1. Three Technical Breakthroughs:

    • 38CrMoAlA Alloy Screw: 40% stronger than standard steel, ensuring longevity under high shear stress.
    • 25:1 L/D Ratio: Achieves 30% better material homogenization compared to 20:1 ratios, critical for high-clarity PC extrusion.
    • 2006/42/EC Compliance: Integrates safety interlocks and thermal cutoffs, reducing workplace risks by 50%.

  2. Optimal Version Selection:

    • Base Model: Best for academic labs needing cost-effective prototyping (e.g., testing biodegradable materials).
    • Advanced Model: Ideal for SMEs requiring multi-zone temperature control for ABS/WPC blends.
    • Pro Model: Targets industrial R&D teams needing automation and high throughput (e.g., continuous PC profile production).

With the Pro’s 7-zone temperature control and automated feed system, you can achieve consistent output for medical-grade PVC tubing. Pair its corrosion-resistant die head with the durable screw to ensure zero material degradation in harsh environments.

Frequently asked questions

  • Which small lab plastic extruder suits R&D and prototyping needs?

  • How to maintain the single screw of a PVC processing extruder?

  • What materials can the SPIRE SJ25 extruder process for profile manufacturing?

  • Can the SJ25 extruder be customized for WPC material extrusion?

  • Is the SPIRE extruder certified for EU industrial standards?

  • Does the 380V single-phase extruder work for small factories?

  • What warranty covers the SPIRE SJ25 plastic extruder?

  • Why is the 25:1 L/D ratio critical for lab extrusion?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Screw L/D RatioComplex profile manufacturingIndustry: 20:1 ▲ Our Base: 25:1 (ISO 683-1) ▲▲ Advanced: 30:1 (ISO 683-1)Enhanced material mixing (Base), superior melt uniformity (Advanced)Higher energy consumption and cost with longer ratios
Material CompatibilityDiverse material processingIndustry: 3–4 materials ▲ Base: 6 materials (PVC, ABS, PP, PC, PE, WPC) ▲▲ Advanced: 8+ materialsVersatility for R&D and small-batch production (Base), expanded flexibility (Advanced)Requires operator expertise for specialty materials
Screw Material QualityHigh-stress applicationsIndustry: Carbon steel ▲ Base: 38CrMoAlA alloy (ASTM A453) ▲▲ Advanced: Stainless steel (ASTM A276)Longer service life (Base), corrosion resistance in harsh environments (Advanced)Higher upfront cost for premium alloys
CertificationsExport-ready productionIndustry: CE ▲ Base: 2006/42/EC (EU Machinery Directive) ▲▲ Advanced: ISO 9001 + 2006/42/ECCompliance with EU standards (Base), global market access (Advanced)Certification costs may increase pricing for Advanced tiers
Voltage & PowerIndustrial facilitiesIndustry: 220V ▲ Base: 380V 3-phase (IEC 60038) ▲▲ Advanced: 380V + 20% higher power outputStable operation under heavy loads (Base), reduced downtime (Advanced)Requires specialized electrical infrastructure
WarrantyLong-term investmentIndustry: 6 months ▲ Base: 1 year comprehensive warranty ▲▲ Advanced: 2 years + on-site supportRisk mitigation for critical operations (Base), extended reliability (Advanced)Higher upfront cost for extended coverage

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