Explore our leading selection of custom machinery engineered for extreme stability and high-output polymer extrusion.
Founded in 2002, BAOD EXTRUSION (Jiangsu Baodie Automation Equipment Co., Ltd.) is dedicated to designing, manufacturing, and selling premium plastic extrusion equipment. Leveraging over 25 years of specialized design and fabrication expertise originally refined in Taiwan, our parent company (KINGSWEL GROUP) established a state-of-the-art extrusion machinery manufacturing base in Shanghai in 1999, later expanding to Jiangsu.
We focus heavily on research and development to achieve precision, high efficiency, and safety protection across all of our medical, industrial, and automotive extrusion systems. Our commitment to quality ensures that we remain a reliable global partner for high-output polythene processing equipment.
Technical insight into melt rheology, screw geometries, and system integration for high-performance thermoplastic extrusion.
Polythene (or Polyethylene, PE) is a versatile semi-crystalline thermoplastic available in multiple densities, including LDPE, LLDPE, HDPE, and UHMWPE. Each variant exhibits distinct molecular weight distributions and shear-thinning characteristics. To process these materials efficiently without thermal degradation, screw geometry design is critical. Modern polythene extruder machines utilize high L/D (Length/Diameter) ratios, typically ranging from 30:1 to 33:1, to ensure sufficient homegenization and melt stability.
A standard SJ series single-screw extruder is configured with three functional zones: the feed zone, compression zone, and metering zone. For HDPE processing, barrier screws are employed to physically separate un-melted solid pellets from the molten pool, preventing solid bed breakup and minimizing output pressure fluctuations. Dynamic mixer blocks, such as Maddock or pineapple mixers, are integrated near the screw tip to improve thermal uniformity and colorant distribution.
The dimensional stability of extruded polythene tubes, profiles, and sheets depends heavily on the post-extrusion cooling and calibration stages. Precise vacuum calibration spray tanks maintain a constant vacuum level controlled by closed-loop frequency-regulated pumps. By adjusting the water flow rate, spray pattern, and vacuum pressure, manufacturers can maintain outer diameter tolerances within ±0.03 mm for standard tubing and profiles.
Our medical-grade lines, for instance, deploy multi-lumen configuration tooling where internal air pressure is meticulously balanced alongside outer vacuum sizing. This maintains exact internal configurations without wall collapse. Co-extrusion blocks allow the simultaneous introduction of radiopaque stripes or reinforcement layers, utilizing advanced multi-manifold dies to ensure precise layer distribution.
| Extruder Class | Material Type | L/D Ratio Range | Typical Applications | Output Efficiency |
|---|---|---|---|---|
| SJ-Series Single Screw | HDPE, LDPE, LLDPE | 28:1 - 33:1 | Precision Medical & Custom Tubes | High Stability, Low Shear Heat |
| High-Speed Corrugation | PE, PP, PA, PVC | 30:1 | Automotive Conduits, Single-Wall Pipes | High Melt Throughput |
| Ultra-High Profile Line | UHMWPE, Engineering Plastics | Specialized Geometry | Wear-Resistant Industrial Guides | Extreme Pressure Capability |
Why leading global manufacturers trust China's precision engineering clusters for capital equipment sourcing.
By housing our manufacturing base in Jiangsu, BAOD EXTRUSION benefits from China's comprehensive industrial supply chain. We procure premium raw tool steel, high-accuracy heating elements, and precision gearboxes directly from specialized local suppliers, passing the cost efficiencies directly to our international clients.
Our systems meet rigid global standards, including CE certification, UL compliance for electrical panels, and IATF 16949 requirements for automotive components. This ensures seamless integration into modern manufacturing plants across Europe, North America, and Southeast Asia.
Drawing from 25 years of engineering experience developed through the Taiwanese parent group KINGSWEL, our designs merge reliable structural fundamentals with modern automation, offering high-durability tooling that outlasts generic regional alternatives.
Bridging the distance with complete technical field service, remote monitoring, and localized machine certification.
Purchasing large-scale capital equipment internationally requires a solid support network to ensure uptime. BAOD EXTRUSION provides localized technical installation, preventative maintenance, and dedicated SLAs (Service Level Agreements) to keep your lines running continuously.
Our extruders are equipped with secure, internet-connected PLC nodes (Siemens/Omron) that allow our engineers in China and regional support hubs to perform remote diagnostics. We can check thermal profiles, torque variations, and sensor performance in real time to resolve issues without waiting for an on-site visit.
Modern plastics processing plants are heavily regulated. We ensure that our equipment complies with local energy-efficiency mandates, noise level restrictions (keeping operation below 75dB), and electrical safety protocols. This simplifies local inspections, safety audits, and insurance approvals for your facility.
Discover how our specialized extrusion systems serve critical global industries with tight tolerances and high performance.
Automotive sealing strips must withstand severe ozone, UV, and thermal cycling. Our co-extrusion systems combine rigid carriers with soft sealing bulbs using TPV and PVC, integrating steel wire or textile reinforcement inline to match vehicle manufacturer tolerances.
Medical catheter lines require cleanroom compatibility and precise, repeatable dimensions. Our extrusion systems produce single and multi-lumen tubing with outer diameters as small as 1mm, maintaining roundness and wall thickness for critical clinical procedures.
Stay updated on our latest product innovations, exhibition showcases, and advancements in extrusion technology.
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Detailed answers to common technical, shipping, and engineering questions for international procurement managers.
Browse our selection of specialized co-extrusion setups, pullers, cutters, and calibration equipment.
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