Custom Rigid PVC Extrusion Manufacturer & Product

Rigid PVC does not incorporate plasticizing additives like phthalates or adipates. Consequently, its glass transition temperature is around 80°C with a very narrow processing window (175°C–195°C). Overheating instantly releases hydrogen chloride (HCl) gas, requiring specialized screw chrome plating, nitrided barrels, and low-compression screw geometries to prevent shear-induced degradation.

Asymmetric profiles suffer from uneven flow velocity since polymer rushes through thicker channels faster than thin ribs. We resolve this via CFD melt channel balancing in the die head and individualized zone vacuum calibration. Haul-off speed and vacuum pull are dynamically linked to multi-axis optical gauge readings.

Yes. While pre-compounded pellets run effortlessly on our specialized single-screw extruders, we also engineer conical and parallel counter-rotating twin-screw extrusion lines equipped with dedicated vacuum degassing ports that handle high-filler dry blend powder directly, lowering per-ton compound costs.

Before machinery dispatch, customers can supply their actual compound resin for Factory Acceptance Testing (FAT). We conduct complete continuous extrusion runs to verify line speeds, surface finish, structural squareness, and tolerances, providing full digital dimensional inspection reports.