Precision-Engineered Parts for WPC, PVC, and High-Filler Plastic Compounding
Production
Frequent equipment downtime and unstable production output caused by easily worn screw elements are common peoblems in WPC (Wood Plastic Composite), PVC and high-filler plastic compounding industries. Conventional standard screw parts fail to adapt to the high-abrasion and corrosive working conditions of continuous industrial extrusion, bringing high replacement costs and low production efficiency.
Our precision-engineered parallel twin screw extruder elements perfectly solve the industry dilemma between overpriced European OEM original parts and inferior low-cost alternative products. Tailor-made for high-load, 24/7 continuous extrusion production scenarios, these screw elements deliver outstanding durability, stable operating performance and long service life, effectively reducing production halts and maintenance costs, and maximizing customers’ investment return (ROI).
Key Features & Technical Advantages
1. High-Grade Wear-Resistant Material Selection
Adopts high-vanadium tool steel (W6Mo5Cr4V2) as the core material, with optional premium powder metallurgy (HIP) materials. The customized material formula can withstand extreme mechanical friction, impact stress and long-term high-load operation, fully adapting to the harsh processing environment of high-filler plastic compounding.
2. Deep Layer Hardness & Lasting Stability
Finished with professional vacuum heat treatment technology, the product achieves a deep hardening hardness of HRC 58–62. Unlike ordinary surface hardening treatments, the hardness penetrates deep into the material matrix, avoiding rapid wear and performance degradation after long-term use, and maintaining consistent extrusion quality for a long time.
3. Ultra-High Precision Machining Craft
All screw elements are processed by high-precision CNC profile grinding equipment, with a mirror-level surface finish (Ra < 0.8μm). The precise dimensional tolerance ensures seamless fitting and perfect meshing between screw components, eliminating material leakage and uneven mixing problems, and improving overall extrusion efficiency.
4. Flexible Modular & Wide Compatibility
Support diversified modular configurations, including conveying, kneading, mixing and reverse assembly modes. It can be flexibly adjusted and optimized according to different material formulas and melt processing requirements, meeting the personalized production needs of various WPC, PVC and high-filler plastic products.
5. Excellent Corrosion Resistance
Optimized for the special chemical environment of PVC processing, it can effectively resist corrosion from HCl gas released during PVC melting and compounding. It greatly reduces component corrosion and aging failure, extends the service life of screw elements, and reduces frequent replacement frequency.
Technical Specifications
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Parameter
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Detailed Specification
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Product Name
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Parallel Twin Screw Extruder Elements
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Standard Hardness
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HRC 58–62 (Deep Hardened)
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Core Materials
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Tool Steel, Alloy Steel, WR13, HIP Steel
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Processing Tech
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CNC Precision Machining & Vacuum Heat Treatment
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Diameter Range
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Standard Ø20mm – Ø133mm (Customizable up to Ø300mm)
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Compatibility
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Coperion, Leistritz, KraussMaffei, JSW, Berstorff, etc.
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Surface Finish
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Mirror polishing, Ra < 0.8μm
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Why Choose Our Extruder Components? (Company Strength)
20+ Years of Material Expertise: We don't just machine parts; we understand the metallurgy behind alloy materials. We know exactly which steel grade fits your specific calcium powder proportion (e.g., 35% CaCO3).
Global OEM Compatibility: Our database covers almost all major international brands. You only need to provide the model or a simple drawing.
Strict Quality Gate: Every shipment includes a Material Certificate and a Dimensional Inspection Report. We offer video outgoing inspections for your peace of mind.
Cost-Effective Logistics: Fast turnaround (30–60days) with reliable international shipping, ensuring your production line never stays idle.
Competitive Comparison: Why BLM is the Smarter Choice
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Feature
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European OEM Brands
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Standard Chinese Parts
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BLM Ultra-Wear Series
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Material Grade
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Premium Imported Steel
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Standard Alloy Steel
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High-Vanadium Tool Steel
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Hardness (HRC)
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60–64
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45–52
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58–62 (Deep Hardened)
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Wear Life (WPC)
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Excellent
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Poor (Frequent Change)
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High (Near-OEM Levels)
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Price Point
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High (Brand Premium)
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Very Low
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Competitive (Factory Direct)
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Lead Time
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12–16Weeks
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4–8 Weeks
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8–12 Weeks (Including Custom)
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Target Applications & Industries
Our screw elements are the "workhorse" for challenging compounding tasks:
WPC (Wood Plastic Composite): Handling high-abrasion wood fiber loads.
PVC Compounding: Resistant to the corrosive nature of rigid and soft PVC.
Masterbatch Production: High-dispersion elements for carbon black and TiO2.
Engineering Plastics: Processing PA6, PA66 + Glass Fiber (up to 50%+).
Biodegradable Plastics: Precise temperature control for PLA/PBAT/Starch blends.
FAQ
Q1: How do I know if these elements will fit my specific extruder brand?
A: We manufacture elements that are 100% interchangeable with major brands like Coperion, Leistritz, and others. We verify fitment through standard serial numbers or custom drawings.
Q2: My process uses 35%+ Calcium Powder. How will your elements hold up?
A: For high-filler (CaCO3) applications like PVC/WPC, we recommend our specialized High-Vanadium Alloy or Bimetallic coatings, which specifically prevent abrasive "scouring" of the screw flights.
Q3: Can you produce custom kneading blocks based on our formula?
A: Yes. We can customize the L/D ratio, stagger angles, and disk thickness to improve mixing efficiency for specialized engineering plastics.
Q4: Do you offer samples for testing?
A: We encourage trial orders. Testing a set of kneading blocks in your most high-wear zone is the best way to prove our durability.
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