PVC Profile Extrusion Line

Our PVC Profile Extrusion Line is specifically designed for continuous production of rigid PVC profiles used in the construction, electrical, and furniture industries. Selection depends on your required output width and hourly capacity.
Small profiles (e.g., decorative trims, cable trays, width up to 150 mm):
Recommended model: SJZ51 (Φ51/105, 18 kW, 80–100 kg/h)
Real case: A Vietnamese door and window accessory producer replaced their single-screw line with an SJZ51. Now they run 24/7 producing PVC edge bands at 80–90 kg/h with no die buildup.
Medium door/window frames (300–400 mm width):
Recommended models: SJZ55 (300 mm, 100–150 kg/h) or SJZ65 (400 mm, 180–300 kg/h)
Real case: A Polish window frame manufacturer uses two SJZ65 lines. Each line produces 400 mm wide casement window frames at 250 kg/h. The 37 kW motor and Φ65/132 conical twin screw design handle formulations with up to 40% CaCO₃ filler without degradation.
Large building profiles (width up to 700 mm, e.g., wall panels, flooring, gutter systems):
Recommended model: SJZ80 (Φ80/156, 55 kW, 160–250 kg/h) – note this output is deliberately conservative for thick-wall profiles.
Real case: A Turkish building materials company uses the SJZ80 to produce 700 mm wide hollow flooring. They achieve 220 kg/h at 190°C melt temperature with scrap rate below 1.5%.
Extra-wide sheets and special profiles (width up to 1000 mm):
Recommended models: SJP93 (400 mm, 250–400 kg/h) and SJP110 (1000 mm, 400–500 kg/h)
Real case: An Egyptian roofing material manufacturer introduced the SJP110 (Φ110/28, 75 kW). They extrude 1000 mm wide corrugated PVC sheets at 480 kg/h – 35% faster than their previous parallel twin screw line.
Note on SJP75 (Φ75/25, 240 mm width, 150–250 kg/h): This model fills the gap between medium and large profiles. It is commonly used for multi-cavity window gaskets and cable covers where wall thickness consistency is critical.

2.1 Conical & Parallel Screw Design – Optimized for PVC
SJZ series (conical twin screw): Φ51/105 to Φ80/156 configurations provide larger feeding sections and progressive compression. This prevents PVC decomposition (no burnt black spots) and allows processing of recycled PVC regrind.
SJP series (parallel twin screw): The Φ110/28 has a high L/D ratio, providing higher shear for highfiller formulations (up to 50% CaCO₃ or wood fiber). Suitable for thickwall, wide sheets.
2.2 Energy-Efficient Main Motor
Our power ratings (18 kW to 75 kW) match actual torque requirements rather than over-specifying. For example, the 22 kW motor on the SJZ55 consumes only 18–19 kWh per ton of PVC profile – verified by an Indonesian customer producing 300 mm cable trays.
2.3 Production Width Flexibility
Unlike fixed-width lines, our dies and calibration tables support quick width changes. For example, the SJZ80 can run widths from 400 mm to 700 mm with just one set of screws. A Malaysian customer changes width twice per shift using preheated adapters.

We implement a 4-stage quality control process compliant with ISO 9001:2015 and ASTM D3678. Each extrusion line is tested before shipment, and we provide the same workflow to customers.

Stage 1: Raw Material & Feeding Verification
Test: PVC compound bulk density (0.55–0.65 g/cm³) and moisture (<0.3%).
Equipment: Gravimetric feeder calibration test for 1 hour.
Example: For SJZ65 set at 250 kg/h, actual deviation must be ≤±2.5 kg.

Stage 2: Online Extrusion Monitoring
Melt pressure & temperature: Sensors at screw tip and adapter. Acceptable range: 180–210°C, pressure 12–20 MPa.
Wall thickness scanning: Ultrasonic or laser gauge (accuracy ±0.02 mm), 10 points across profile width.
Real QC data from an SJP93 line: Wall thickness variation controlled within 0.05 mm for a 400 mm wide hollow profile at 350 kg/h.

Stage 3: Vacuum Calibration & Cooling Tank Test
Vacuum level: -0.06 to -0.08 MPa, held for 30 seconds – checked with digital manometer.
Cooling water temperature: Maintained at 15–20°C, flow rate ≥15 L/min per calibration section. Any fluctuation triggers an automatic alarm.

Stage 4: Final Profile Testing (Offline)
Impact resistance: Drop dart impact tester (ASTM D4226) – minimum 20 ft-lbf for window profiles.
Heat deflection temperature (HDT): 70–75°C under 1.82 MPa load.
Dimensional stability: 24 h oven test at 60°C – shrinkage ≤1.5%.
Certification: Each line comes with a factory acceptance test report and video recording. Third-party inspection (SGS, TÜV) available at extra cost upon customer request.

Product Specifications：

Q1: Why does the SJZ80 have a lower output (160–250 kg/h) than the SJZ65 (180–300 kg/h)?
A: This is intentional. The SJZ80 (Φ80/156) is for thick-wall, high-density profiles (e.g., 8–12 mm wall thickness). The SJZ65 is for thinner profiles (2–5 mm) with higher line speed. If you need 300+ kg/h for thin profiles, choose SJZ65; for heavy structural profiles, choose SJZ80.

Q2: Can the SJP110 truly produce 1000 mm wide flat sheets without warpage?
A: Yes, but with the correct downstream calibration equipment. We provide a multi-stage vacuum calibration table (4 sections) and a 12-roller puller with independent pressure adjustment. One US customer produces 1000 mm x 6 mm PVC foam boards at 420 kg/h – flatness ≤1.5 mm over 2 meters length.

Q3: What is the difference between SJZ and SJP series for PVC profiles?
A:
SJZ (conical twin screw): Better for heat-sensitive PVC, easier color changes, lower energy consumption per kg. Best for profiles up to 400 mm width.
SJP (parallel twin screw): Higher output, higher torque, suitable for wood-plastic composites or high-filler formulations. Best for wide sheets (>700 mm) and high-volume production.

Q4: How often should the screw and barrel be replaced?
A: For 100% virgin PVC – 18,000–20,000 hours. For formulations containing regrind (>30% crushed material) – 12,000–15,000 hours. Our standard is nitrided steel (HV 950–1000), with optional bimetallic barrels for abrasive fillers.

Q5: Do you provide support for new die designs?
A: Yes. We need 2D drawings (DXF or PDF format) and the desired line speed. Our engineers use CFD simulation to calculate flow channel balance. Recent example: A Brazilian customer needed a 240 mm asymmetric wall baseboard – we delivered a flow-optimized die within 14 days.