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Premium Extruder Screw Barrels
Engineered for Durability & Precision

High-performance screw barrel sets for plastic extrusion, recycling, granulation, and injection molding. Manufactured in China with advanced nitriding, bimetallic treatment, and precision machining.

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Who We Are

Zhejiang Alven Intelligent Manufacturing Co., Ltd., formerly Jiading Plastic Machinery Co., Ltd., founded in 2002, is located in Zhoushan — the hometown of screws & barrels.

Alven Factory

Our 22,000 square meter factory employs 80 skilled professionals dedicated to manufacturing high-precision extruder screw barrels. We specialize in OEM, rebuilding, and custom design services with door-to-door measuring and technical support.

  • Founded in 2002 | Zhoushan, China
  • 22,000 m² Manufacturing Facility
  • 80+ Skilled Engineers & Technicians
  • Full OEM & Custom Design Capabilities
  • Nitriding, Bimetallic, Chrome Plating
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Our Premium Products

High-quality extruder screw barrels for every industrial application

Extruder Screw Barrel

Extruder Screw Barrel

  • Nitriding Hardness: HV900-1000
  • Nitride Depth: 0.5–0.8mm
  • Surface Roughness: Ra0.4
  • Material: 38CrMoAlA Alloy Steel
  • Application: PP/PE/PET Extrusion
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Screw Barrel Set

Screw Barrel Set

  • Chrome Layer Hardness: ≥950HV
  • Chrome Thickness: 0.05–0.10mm
  • Material: 38CrMoAlA / 40CrMo
  • Cooling: Water or Oil Cooling
  • Length: 300–8000mm
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Squeezer Screw Barrel

Squeezer Screw Barrel

  • Nitrided Layer: 0.5–0.8mm
  • Processing: Nitriding / Bimetallic
  • Material: Alloy Steel
  • Barrel Straightness: 0.015mm
  • Application: Recycling Granulation
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Injection Screw Barrel

Injection Screw Barrel

  • Diameter: Ø20–Ø400
  • Material: 38CrMoAIA, SACM645
  • Warranty: 1 Year
  • Inspection: Video Outgoing
  • Type: Gradual / Mutant
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Parallel Twin Screw Barrel

Parallel Twin Screw Barrel

  • Tempering Hardness: HB260-290
  • Nitriding Hardness: HV950-1050
  • Nitriding Depth: 0.4–0.7mm
  • Application: PVC Extrusion
  • Precision: High
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Bimetallic Screw Barrel

Bimetallic Screw Barrel

  • Bimetallic Layer: HRC62-68
  • Surface: Nitriding
  • Material: Alloy Steel
  • Application: PP/PE/PVC Recycling
  • Wear Resistance: High
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Single Screw Barrel

Single Screw Barrel

  • Quenching Hardness: HRC58-62
  • Screw Speed: 0–600rpm
  • Alloy Depth: 2–5mm
  • Surface Roughness: Ra0.4μm
  • Application: Granulation Machines
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Conical Twin Screw Barrel

Conical Twin Screw Barrel

  • Type: Double Screw & Barrel
  • Application: High-Torque Extrusion
  • Material: High-Grade Alloy Steel
  • Processing: Precision Machined
  • Compatibility: Universal Extruders
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Why Choose Alven?

Engineered excellence in every screw barrel we manufacture

High Wear Resistance

Nitriding, bimetallic coating, and chrome plating ensure extended service life under high-stress conditions.

Precision Engineering

Straightness tolerance of 0.015mm and surface roughness Ra0.4μm for optimal extrusion performance.

OEM & Custom Design

Full customization including dimensions, materials, and heating zones to match your extrusion system.

Quality Assurance

Rigorous QC process with video outgoing inspection and 1-year warranty on selected products.

22,000+
Square Meters Factory
80+
Skilled Employees
2002
Year Founded
50+
Countries Served

Frequently Asked Questions

What materials are used in your screw barrels?

We use high-grade alloy steels such as 38CrMoAlA, 40CrMo, SKD61, and SKD11. Bimetallic barrels feature wear-resistant linings with hardness up to HRC68.

What surface treatments do you offer?

We provide nitriding (HV900-1200), chrome plating (≥950HV), and bimetallic coating for enhanced wear and corrosion resistance.

Can you manufacture custom screw designs?

Yes, we offer full OEM services including custom screw geometry, diameter, length, and heating zones based on your extruder model.

What is the typical lead time?

Standard products: 15–25 days. Custom orders: 25–45 days depending on complexity and specifications.

Do you provide inspection reports?

Yes, we offer video outgoing inspection and material certification upon request.

Get in Touch

Contact us for product inquiries, custom orders, or technical support.

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We respond to all inquiries within 24 hours.

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