WPC COMPOUNDING & PROFILE PRODUCTION
Wood-Plastic Composite Production Lines
Integrated WPC systems combining raw-material preparation, compounding and downstream product forming.
Processing challenge
WPC materials combine polymer with wood flour or other lignocellulosic filler. Moisture control, feeding consistency, dispersion, venting and thermal management are critical.
Recommended equipment approach
The catalogue WPC line runs as a single pass: 1 high-speed mixer → 2 SJSH co-rotating twin-screw extruder → 3 SJ single-screw extruder → 4 profile die → 5 water cooling → 6 haul-off → 7 cutter → 8 finished product. The twin-screw stage disperses wood flour into the polymer and vents the moisture it carries; the single-screw stage then builds pressure at low speed and low melt temperature, so the compound reaches the die without scorching the lignocellulosic filler.
Two equipment routes are offered: a one-step line built on a single SJSH machine, or a two-stage SHJ package where the twin-screw and single-screw extruders are separately driven for higher output and tighter control.
One-step WPC equipment data
| Model | Stage | L/D | N max (r/min) | Main motor (kW) | Output (kg/h) |
|---|---|---|---|---|---|
| SJSH65 | Single machine | 30–36 | 400 | 75 | 80–120 |
| SJSH75 | Single machine | 30–36 | 400 | 90 | 90–140 |
| SHJ50/100 | 1 — twin-screw | 20–28 | 400 | 22–37 | 37 |
| 2 — single-screw | 10–14 | 65–85 | 37–45 | ||
| SHJ65/150 | 1 — twin-screw | 20–28 | 400 | 45–55 | 90–200 |
| 2 — single-screw | 10–14 | 65–85 | 55–75 | ||
| SHJ75/180 | 1 — twin-screw | 20–28 | 400 | 90–110 | 120–250 |
| 2 — single-screw | 10–14 | 65–85 | 90 | ||
| SHJ75/250 | 1 — twin-screw | 20–28 | 400 | 90–110 | 200–300 |
| 2 — single-screw | 10–14 | 65–85 | 90 |
Catalog reference values. Output depends on wood-flour type, moisture and loading, and on the profile being produced.
Typical materials
- PE- or PP-based WPC formulations
- Wood flour and compatible fillers
- Coupling agents, lubricants and colour additives
Pelletizing and downstream
Depending on the final product route, the system may produce compound pellets or feed profile-extrusion and cutting equipment directly.
Information required for quotation
- Polymer type and recycled-content percentage
- Wood-flour type, moisture and particle size
- Filler percentage
- Required profile or pellet output
- Final product dimensions