PVC Plastic-Steel / PVC Wood-Plastic Wide Sheet Extruder Line

The combination of PVC plastic-steel and PVC wood-plastic sheets opens up a wide range of applications:
PVC Plastic-Steel Sheets
Concrete formwork systems – Replace traditional steel or plywood formwork, lightweight (40% lighter than steel formwork), waterproof, reusable 50-80 times.
Industrial protective sheets – Used in chemical plants, food processing facilities, and clean rooms, offering excellent corrosion resistance and easy cleaning.
Transport vehicle flooring – Lining sheets for trucks and trailers, resistant to impact, diesel, and road salt.

PVC Wood-Plastic Sheets
Outdoor flooring and fencing – High weather resistance, low maintenance, realistic wood grain texture.
Interior wall panels and ceilings – Lightweight, flame retardant (with additives), moisture resistant.
Automotive interior components – Door panels and trunk flooring, requiring low VOC and dimensional stability.

Actual Case – Vietnamese Furniture Manufacturer
A furniture factory in Binh Duong Province, Vietnam, installed a YF1000 line to produce wood-plastic sheets for outdoor benches and garden flooring. With a maximum extrusion capacity of 750 kg/h and sheet width of 1000 mm, they achieved a 20% reduction in raw material costs compared to solid wood, while tripling production speed. The finished sheets passed ASTM D7032 flooring performance standards and remained straight and warp-free after two years of use in a tropical climate.

Actual Case – German Construction Company
A German formwork rental company adopted the YF1250 line (1250 mm width) to produce PVC plastic-steel formwork sheets. The higher cooling water capacity (18 m³/h) and compressed air consumption (1.0 m³/min) enabled rapid cooling of thick sheets (up to 30 mm), ensuring flatness within ±0.2 mm. These sheets replaced 12 mm thick steel plates, reducing transport weight per truck by 35% and lowering fuel costs by 18%.

The YF series delivers tangible benefits based on its design specifications:
2.1 High Production Efficiency and Optimized Energy Use
Extrusion capacity – YF800: 450 kg/h; YF1000 and YF1250: 750 kg/h. This enables 24/7 continuous operation with minimal downtime.
Extruder power – 55 kW (YF800) and 110 kW (YF1000/1250). Specific energy consumption (kWh/kg) is very low: approximately 0.122 kWh/kg for YF800, and about 0.147 kWh/kg for larger models – 15% better than single-screw alternatives.
2.2 Wide and Flexible Sheet Dimensions
Maximum product width: 800 mm / 1000 mm / 1250 mm – suitable for standard building sheets (1220 mm wide) and custom furniture boards.
Thickness range: 3–30 mm (adjustable via die gap and calendering unit). Many applications require no secondary lamination.
2.3 Robust Conical Twin-Screw Extruder (SJZ Series)
SJZ 80/156 (YF800) and SJZ 92/188 (YF1000/1250) – Conical screw design ensures:
Gentle yet thorough mixing of PVC resin, wood fiber (40–60 mesh), and additives.
Reduced shear heat, preventing degradation of heat-sensitive wood fiber in wood-plastic composites.
Longer screw life: typical maintenance interval of 12,000–15,000 hours, even with abrasive wood flour.
2.4 Precise Utility Consumption

These are actual operating requirements, not peak loads. Closed-loop cooling systems recycle 90% of water, reducing total consumption by 40% compared to older designs.
2.5 Designed for Wood-Plastic and Plastic-Steel Formulations
The extruder and downstream calibration units can withstand:
Wood powder content up to 50% in wood-plastic composites (requires coupling agents).
Calcium carbonate filler up to 40 phr (parts per hundred resin) in plastic-steel sheets, increasing rigidity without damaging the screw.
Optional chrome-plated screw surface for highly abrasive steel-reinforced composites.

To ensure every sheet meets international standards (ASTM, EN, ISO), the YF series lines integrate a multi-stage quality control process:
3.1 Raw Material Incoming Inspection
PVC resin – K value 65–68 for wood-plastic, K value 60–62 for plastic-steel. Tests include viscosity and moisture content (<0.3%).
Wood fiber – Particle size distribution (40–80 mesh), moisture content (<2%), no metal impurities (via magnetic separator).
Additives – Impact modifiers (CPE, ACR), stabilizers (calcium/zinc or organotin), lubricants, and foaming agents (for lightweight sheets).
3.2 In-Process Monitoring (Real-time)
Melt temperature and pressure – Sensors at the die; alarm when pressure fluctuation exceeds ±3% (indicating screen pack clogging or unstable feeding).
Sheet thickness – Ultrasonic or laser thickness gauge at the puller; closed-loop feedback automatically adjusts die lip gap. Tolerance maintained at ±0.05 mm for sheets ≤10 mm.
Width control – Edge trimming guide with servo motor; deviation <2 mm per linear meter.
3.3 Finished Product Testing (Per Batch)
Samples from every 500 m² undergo the following tests:

3.4 Long-Term Reliability Test – Actual Case
A Vietnamese wood-plastic manufacturer conducted a 72-hour continuous production test on a YF1000 line at 85% of maximum capacity (637 kg/h). Results:
Thickness variation was 0.08 mm (target for 10 mm sheet) – well within specification.
No screw wear debris detected in the melt filter after 72 hours.
Color consistency measured by spectrophotometer: ΔE < 0.6 throughout the run.
All test data was recorded via PLC and can be exported for customer certification (ISO 9001:2015 documentation provided).

Below are the six most frequently asked questions collected by our engineers from customers in Europe, Southeast Asia, and the Middle East.
Question 1: How to choose between YF800, YF1000, and YF1250?
Answer: Choose based on required sheet width and target annual output.

If you need an annual output above 3000 tons, YF1000 or YF1250 are economical choices – the 110 kW motor and 92/188 extruder provide excellent torque stability.

Question 2: Can the same line produce both plastic-steel sheets and wood-plastic sheets?
Answer: Yes – with minor changeover. The YF series lines include:
Dual-formulation screw design that efficiently mixes wood fiber (low bulk density) and high-density fillers (calcium carbonate, short glass fiber).
Quick-screen changer – switching from 80-mesh to 40-mesh filter takes less than 15 minutes.
Purge compound – use 10 kg of low-viscosity PVC purge compound to clean the screws before switching material types.
Note: For plastic-steel sheets with >15% steel fiber content (e.g., for high-impact protective sheets), we recommend the hard-faced screw option (tungsten carbide coating) to extend screw life.

Question 3: What causes uneven sheet thickness and how to solve it?
Answer: Based on field service records, the top three causes:
Die lip misalignment – Check and adjust manual die lip bolts at low line speed. YF series dies have independent heating zones for each die lip section.
Inconsistent melt temperature – Verify all heating bands are working properly (infrared thermometer shows ±2°C variation). Clean thermocouple wells – old oil/polymer residue can cause false readings.
Screw mixing section wear – After 10,000 operating hours, the compression zone may wear. Measure screw outer diameter; if wear >0.5 mm, repair or replace.
Actual repair case: A Polish customer reported thickness deviation of 0.4 mm on 8 mm wood-plastic sheets. We found two failed heating bands on the adapter flange. After replacement, deviation dropped to 0.07 mm.

Question 4: What is the typical power consumption per kilogram of finished sheet?
Answer: For YF1000 producing standard wood-plastic (50% wood flour, 50% PVC) at 700 kg/h:
Extruder motor: 110 kW × 0.85 (typical load) = 93.5 kW
Downstream motors (calibrator, puller, cutter, heating/cooling): ≈18 kW
Total = 111.5 kW → 0.159 kWh per kg of sheet
For plastic-steel sheets with higher calcium carbonate content (harder to melt), energy consumption rises to about 0.185 kWh/kg. Compared to single-screw extruders (0.22–0.28 kWh/kg) – this saves 25-35% on electricity bills.

Question 5: How often should I change the cooling water and clean the system?
Answer: Use softened or deionized water to prevent scaling. Recommended schedule:
Water change – every 3 months (or when conductivity > 500 µS/cm).
Clean cooling channels – every 6 months using citric acid solution (2% concentration, circulate for 4 hours). Just 0.5 mm of scale buildup increases energy consumption by 10%.
Check water strainers – monthly (especially for YF1250 with 18 m³/h flow – a partially clogged strainer reduces cooling efficiency and causes sheet warpage).

Question 6: Can the same extrusion line produce both solid PVC plastic-steel sheets and foamed PVC wood-plastic sheets?
Answer: Yes, but with some important adjustments.
The YF series (YF800, YF1000, YF1250) uses conical twin-screw extruders (SJZ 80/156 or SJZ 92/188) which combine good mixing ability with low shear – suitable for both highly filled formulations (plastic-steel, 40 phr calcium carbonate) and heat-sensitive wood-plastic composites.

Question 7: How to prevent sheet warpage when producing wide (1250 mm) sheets at high speed?
Answer: Warpage is usually caused by uneven cooling across the sheet width or internal stress generated by improper die lip adjustment. The YF1250 (1250 mm width, cooling water 18 m³/h, compressed air 1.0 m³/min) is designed to minimize warpage, but correct operation remains critical.