Core Manufacturing Equipment
High-Precision Polymer Processing & Profile Extrusion Units
Directly integrated with high-torque nitrided and bimetallic screw barrel assemblies, our precision extrusion production suites provide high-tolerance melt pressure stability, zero dimensional drift, and optimal plasticizing efficiency.
Metallurgical Authority
Engineering Leadership in Extrusion Tribology & Rheology
In modern industrial plastics processing, the screw and barrel pair represents the thermodynamic engine of the entire extrusion system. Over 25 years of specialized mechanical engineering informs our continuous optimization of shear rates, thermal transfer dynamics, and high-wear metallurgical formulations.
25+
Years Manufacturing Experience
16,000 m²
Modern Production Facility
68-72 HRC
Bimetallic Surface Hardness
±0.008 mm
CNC Machining Accuracy
Substrate Alloy Selection
We deploy certified structural steels including 38CrMoAlA (SACM 645), 42CrMo, SKD61, and premium nickel-based tool steels to prevent core shaft twisting under extreme pressure profiles exceeding 500 bar.
- Core Tempering: 280-320 HB for shock resistance
- Ultrasonic Defect Inspection: Zero micro-porosity guaranteed
Plasma & Centrifugal Alloying
Utilizing computerized PTA (Plasma Transferred Arc) welding and centrifugal casting, we fuse a 2.5–3.5mm thick dense alloy matrix containing tungsten carbide (WC) or nickel-cobalt composites directly onto the wear interfaces.
- High Abrasive Resistance: Suitable for 65%+ glass fiber loads
- Superior Bonding: Mechanical shear separation strength > 350 MPa
Rheological Geometry Design
Our flight geometries are custom designed according to the polymer's shear-thinning characteristics. We implement Maddock mixing heads, pineapple dispersers, and barrier flights to achieve stoichiometric color and additive distribution.
- Melt Delta T: Maintained within ±1.5°C across the die
- L/D Ratios: Custom calculated from 20:1 up to 48:1
Advanced Industrial Capacity
China Factory 4.0: Modern Supply Chain Resilience & Precision CNC Control
Operating from our integrated 16,000 m² smart factory complex in Jiangsu, China, we combine domestic steel supply chain scale with multi-axis CNC machine centers to manufacture high-longevity screw barrels with reliable turnaround times.
Complete In-House CNC Fleet
Equipped with 12-meter precision deep-hole boring machines, vertical honing centers, and German 4-axis thread milling suites. This high-capacity manufacturing footprint ensures uniform internal bore clearances and strict linearity tolerances (under 0.015mm per linear meter).
Controlled Computer Nitriding
Our multi-stage 120-hour gas nitriding cycles undergo computerized continuous monitoring. The nitrided case layer reaches a consistent depth of 0.50mm to 0.80mm with zero surface brittleness (Grade 1 rating), avoiding brittle micro-spalling during abrasive composite processing.
CMM & Laser Geometry Validation
Each individual barrel bore and screw flight is fully indexed on coordinate measuring machines (CMM) and laser optical profilers before protective crating. Fully digitized inspection certificates are cataloged and issued directly with every shipment.
Targeted Application Solutions
Engineered Screw & Barrel Formulations Across Industrial Verticals
Polymer melt behaviors diverge significantly across technical thermoplastics, fluoropolymers, and elastomer matrices. We match your process profile with tailored screw flight geometries, root taper rates, and metallurgy.
| Application Sector | Common Resin Matrix | Wear & Degradation Mechanism | Recommended Screw Metallurgy | Recommended Barrel Liner Alloy |
|---|---|---|---|---|
| Automotive Under-the-Hood | PA66 / PA12 + 30-50% Glass Fiber | Extreme abrasive shear, fiber breakage wear | Bimetallic PTA Tungsten Carbide Hardfacing | NiCrFe-WC Centrifugal Bimetallic Alloy |
| Medical & Life Sciences | Medical PVC, TPU, PEEK, Pebax | Corrosive volatiles, cross-contamination risks | Mirror-Polished SKD61 or Hastelloy C-276 | HIP (Hot Isostatic Pressed) High-Cr Alloy |
| Corrugated Conduit & Infrastructure | Recycled HDPE, PP, Rigid PVC | HCL acid off-gassing + mineral particulates | Double-Nitrided 38CrMoAlA + Chrome Plating | Fe-Base High-Chromium Bimetallic Bushing |
| EV Sealing Strip Profiles | TPV, EPDM/PP Blends, Plasticized PVC | Phase separation, cross-linking buildup | Barrier Screw with Maddock Dispersive Mixer | Integral Nitrided SACM645 with Smooth Finish |
| Continuous Wire & Cable Jacketing | XLPE, HFFR (Halogen Free Flame Retardant) | Severe mineral filler abrasion (ATH / MDH) | High-Cobalt Stellite Alloy Flight Edges | Tungsten Carbide Embedded Nickel Matrix |
Procurement Assurance
Meeting Global OEM Standards: Localized Support, Traceability & Compliance
Enterprise equipment buyers require verifiable supply chain security, full raw-material traceability, and seamless drop-in dimensional compatibility with existing European, American, or Asian extrusion assets.
Mill Test Traceability (EN 10204 3.1)
Every forging billet used in our screw and barrel production is accompanied by full chemical composition analysis and physical test certifications. We trace every serial number back to the raw ingot batch, eliminating alloy substitutions.
Global Drop-in Interchangeability
Whether your machine line is KraussMaffei, Battenfeld-Cincinnati, Davis-Standard, or Toshiba, our engineers work from 2D/3D step files or digitized field measurements to deliver 100% bolt-on compatibility for mounting splines, keyways, heating zones, and thermocouples.
On-Demand Emergency Wear Spares
We provide customized framework agreements for multi-line converting plants, maintaining raw tempered blanks and standard screw segments in stock for expedited emergency processing to prevent costly plant downtime.
R&D Innovation Horizon
Technology Roadmap: High-Efficiency Plasticizing in the Industry 5.0 Era
As circular polymers, bio-resins (PLA/PHA), and PCR (Post-Consumer Recycled) streams present volatile melt indexes and foreign contaminants, extrusion tooling must adapt with smart diagnostic integrations and ultra-low energy shear profiles.
Low-Energy Screws
Developing low-shear compression zones that reduce polymer mechanical shear heating, achieving up to 18% specific energy consumption savings (kWh/kg) in high-throughput polyolefin extrusion.
Embedded Sensor Barrels
Integrating thin-film piezoelectric pressure and fast-response infrared melt temperature sensors along the barrel body for millisecond-scale closed-loop adaptive thermal control.
Circular PCR Processing
Advanced degassing vent-port geometries and specialized dispersive flight geometries configured to extract residual volatile organic compounds (VOCs) and moisture from post-consumer flakes.
Nano-Composite PVD
Applying sub-micron multilayer TiAlSiN and Diamond-Like Carbon (DLC) physical vapor deposition coatings for minimal friction coefficients (< 0.08) and enhanced release when extruding sticky elastomers.
Continuous Line & Auxiliary Units
Specialized Extrusion Lines, Pullers, Sizing & Automation Units
Browse the second division of our manufacturing catalog. All machines are built using heavy-duty frame architectures, precision drives, and wear-resistant polymer contact surfaces for stable 24/7 continuous production.
Procurement & Technical FAQ
Frequently Asked Technical Questions by Global Extrusion Engineers
Clear, data-backed answers addressing tolerances, metallurgical lifespan, wear detection, and procurement steps when working with Chinese screw and barrel manufacturers.
What is the expected operating lifespan difference between standard nitrided and bimetallic screw barrels?
For unreinforced commodities such as virgin LDPE or PP, standard 38CrMoAlA gas-nitrided barrels (nitride depth ~0.6mm, >950 HV) regularly operate smoothly for 25,000 to 35,000 production hours. However, when processing engineering polymers compounded with 30%+ glass fibers, calcium carbonate, or flame retardants, a nitrided layer can wear through within 3,000 to 5,000 hours. In contrast, PTA bimetallic alloy flight hardfacings (Tungsten Carbide / Ni60) coupled with centrifugally cast bimetallic barrel liners (2.5mm–3.5mm thick, 65–70 HRC) deliver 18,000 to 30,000 hours of continuous service under abrasive conditions, offering a lower Total Cost of Ownership (TCO).
How does flight clearance wear directly impact overall extrusion line output and polymer stability?
Standard diametrical clearance between the screw flight OD and barrel inner diameter is engineered between 0.002 to 0.004 inches (0.05mm to 0.10mm) per inch of screw diameter. As wear increases clearance beyond 3x the design baseline, polymer melt backflow (pressure-driven leak flow over flight crests) increases exponentially. This causes elevated melt temperatures, shear degradation, color shifting, surging head pressures, and a 15% to 30% reduction in specific volumetric output (kg/hr/RPM), requiring increased motor amperage for equivalent throughput.
Can you manufacture customized replacement screw barrels from worn physical samples or sketches?
Yes. If original manufacturing blueprints are unavailable, our technical engineering team can reconstruct complete production drawings from worn sample components. We utilize internal laser bore gauges, Faro arms, optical thread pitch scanners, and ultrasonic thickness testers to map out root depths, pitch geometry, L/D ratios, drive spline configurations, thermocouple holes, and cooling jacket locations. We also conduct on-site metal spectroscopic analysis to verify the base alloy and recommend optimized metallurgical upgrades.
What quality assurance data is provided before export shipment from your factory?
Every export shipment undergoes our strict Factory Acceptance Test (FAT) protocol. The documentation package includes: (1) Raw Material Mill Certification (EN 10204 3.1) showing chemical composition and tensile data; (2) Heat Treatment & Nitriding Depth Curves; (3) Hardness Testing Reports across screw root, flight edge, and barrel bore ID; (4) Full CMM Dimensional & Concentricity Inspection Sheets; and (5) Straightness Verification Certificates ensuring barrel bore runout remains strictly under 0.015mm/m.
How do you optimize screw geometry for heat-sensitive or high-viscosity polymers like PVC or UHMWPE?
Heat-sensitive polymers like Rigid PVC require low shear heat generation and zero dead-spots to prevent degradation and hydrochloric acid formation. We engineer screws with deep flight depths in the metering section, shallow compression ratios (1.8:1 to 2.2:1), smooth chrome plating (0.03–0.05mm), internal core-cooling bores, and continuous flight surfaces without dead zones. For ultra-high-molecular-weight polymers like UHMWPE, we employ specialized single-flight low-compression grooved-feed geometries to ensure consistent solid-bed conveying without thermal bridging.