Custom PVC Extrusion Machine Manufacturer & Factory

Rigid PVC (uPVC) is extremely shear-sensitive and possesses high melt viscosity without a true liquid melting point. It requires an extruder screw with a shallow flight depth, lower compression ratio (typically 1.8:1 to 2.2:1), specialized chrome plating or bimetallic barrier flights, and forced internal core oil cooling to prevent localized overheating. In contrast, Plasticized Soft PVC (sPVC) tolerates higher compression ratios (2.5:1 to 3.0:1) and deeper metering flights to homogenize plasticizers without degradation. BAOD custom designs screw geometries specifically tailored to your formulation’s K-value and filler ratios.

Consistent tubing dimensions rely on four synchronized elements: (1) Melt pump integration (positive displacement gear pump) to eliminate extruder surging and screw pulsation; (2) High-precision die heads with spiral mandrel distribution that equalize radial pressure; (3) Stainless steel vacuum sizing tanks equipped with closed-loop multi-stage vacuum regulation (±0.05 kPa); and (4) High-frequency multi-axis laser gauging heads coupled directly to servo haul-off pulling crawlers via closed-loop feedback.

Yes. BAOD specializes in turnkey multi-layer co-extrusion systems ranging from 2 to 5 distinct concentric layers. When combining chemically incompatible resins, our crossheads incorporate dedicated tie-layer (adhesive resin) micro-extruders. Die melt channels are engineered through computational fluid dynamics (CFD) simulation to balance flow velocities and prevent delamination at interfacial layer boundaries.

Under severe thermal stress or stagnation, PVC releases corrosive HCl gas. We mitigate this through streamlined, dead-zone-free flow channels inside the barrel and die head, highly polished surfaces (Ra < 0.05 µm), and premium base metallurgy including GH113 bimetallic liners, DIN 1.8550 nitrided alloys, or Hastelloy/Inconel alloys for extreme-performance medical or chemical handling dies.

Before machinery dispatch, BAOD invites client engineers or third-party inspectors to our 16,000 m² Haian facility for rigorous FAT trials. We run the complete line using the client’s designated raw material compound and masterbatch under real operating temperatures. We measure continuous dimensional stability (Cpk calculation), line speed synchronization, safety emergency stops, cutter edge quality, and thermal drift over a continuous 8-to-24-hour test regimen.

Standard custom extrusion lines typically require 45 to 75 production days depending on downstream complexity and tooling customization. Machines are packed in vacuum-sealed anti-corrosion barrier foil, reinforced in heavy-duty export seaworthy timber crates. Our Global Service division assists with maritime freight, customs technical documentation, foundation schematics, and sends engineers for on-site commissioning and line handover.