Precision Plastic Profile Extrusion Line for PP, PE, ABS and TPU Profiles

A single screw plastic profile extrusion line is normally used for pellet materials such as PP, PE, ABS, TPU and selected PVC pellet compounds. It is suitable when the project depends on stable melt delivery, profile die matching, surface finish control and downstream sizing rather than powder-compound processing.

Twin screw systems are more commonly used for PVC powder compound and rigid PVC window or door profile production. This page focuses on precision plastic profile extrusion lines for pellet materials, not PVC window profile lines or finished profile supply.

If the profile geometry and stability allow, free-sizing direct-to-water cooling can reduce tooling contact, which helps when surface appearance is the priority. Vacuum calibration is typically selected when the cross-section requires stronger shape lock, often for hollow or complex profiles.

Final selection depends on the drawing, PVC compound formulation and the agreed appearance or defect criteria.

An optional film-laminating protective wrapping unit can be added at the end of the line to apply surface protection before handling, stacking and packing. The film type and application method are configured to your profile shape and surface requirement.

Delamination in soft-rigid co-extruded profiles is typically caused by poor interfacial bonding between the two compounds. We manage this through material compatibility review, temperature strategy to support bonding at the interface, clean material handling to avoid contamination and flow balance through the co-extrusion tooling to maintain consistent layer ratios.

Final settings depend on your specific compound pair and layer structure, and are verified against your acceptance method.

TPU is sensitive to friction and moisture. We use specialized non-stick coatings on sizing sleeves and a screw design that supports gentle homogenization to reduce air entrapment and surface defects.

Dimensional stability depends on cooling consistency and traction control matched to your profile geometry. We configure the cooling path and water temperature to avoid uneven contraction, then tune haul-off tension to maintain steady pull without deforming the profile.

Verification is done against your drawing tolerances using agreed sampling points under production conditions.

Yes. For very soft TPU, we configure the line with a specialized soft-touch caterpillar haul-off and chipless rotary cutters to reduce deformation during traction and cutting.

PP and PE have high crystallization rates and significant post-cooling shrinkage. Dimensional control starts at the die, where we compensate for die swell in the tooling design. After the die, we use extended multi-stage vacuum tanks and high-volume water spray to freeze the dimensions rapidly, reducing temperature gradients across thick and thin walls.

Haul-off type and contact pressure are selected to maintain steady pull without imprinting. For complex cross-sections, in-line straightening units can be added to counteract post-cooling deformation.

Yes. PP and PE are semi-crystalline and continue to shrink as they cool, unlike amorphous resins such as ABS, which stabilize faster. This means PP and PE lines typically need longer cooling paths, more aggressive water spray coverage and lower haul-off contact pressure to avoid surface marking on the softer material.

We configure these parameters based on your specific resin grade and profile geometry.

ABS surface quality depends on melt homogeneity and precise temperature control. ABS-specific screw geometry is designed to deliver a uniform melt with minimal flow lines. We also recommend integrated desiccant dryers to reduce moisture before processing, because residual moisture in ABS can cause silver streaks or splay marks that damage surface gloss.

ABS contains a butadiene rubber phase that gives it impact resistance. Excessive shear or barrel temperature can degrade this rubber phase, making the final profile brittle. Screw geometry should use controlled shear to help preserve the polymer structure.

We also monitor melt temperature closely to keep it within the safe processing window: high enough for good flow, but low enough to reduce thermal degradation risk.