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Views: 0 Author: Site Editor Publish Time: 2026-01-30 Origin: Site
With the global demand for durable, waterproof, and eco-friendly doors rising rapidly, WPC (Wood Plastic Composite) doors have become a preferred choice for residential, commercial, and project-based construction. At the core of this product is the WPC door board extrusion line.
As a direct WPC extrusion line manufacturer, KINGSHINE works closely with door factories worldwide to design high-efficiency, stable, and scalable WPC door board production lines. In this guide, we explain how a WPC door board extrusion line works, from raw materials to finished boards, helping you clearly understand the technology before investing.
A WPC door board extrusion line is a complete production system used to manufacture WPC door panels by continuously melting, mixing, and shaping wood-plastic composite materials through an extrusion process.
WPC door boards
WPC hollow door panels
WPC solid door panels
WPC laminated door substrates
These boards are later machined, laminated, or assembled into finished WPC doors.
Understanding raw materials is essential to understanding how the extrusion line works.
PVC / PE resin (main matrix)
Wood powder (60–70 mesh commonly used)
Calcium carbonate
Lubricants & stabilizers
Processing additives
The formulation directly affects board strength, surface quality, and extrusion stability. KINGSHINE provides material formulation guidance together with the extrusion line.
Below is the standard production process used in KINGSHINE WPC door board extrusion systems.
All raw materials are automatically weighed and mixed using:
High-speed hot & cold mixer
Automatic feeding system
This ensures uniform material distribution and stable extrusion quality.
The twin-screw extruder is the core of the entire WPC door board extrusion line.
Key functions:
Plasticizing wood-plastic materials
Removing moisture and air
Ensuring homogeneous melt
KINGSHINE uses optimized screw designs specifically developed for WPC door board applications, ensuring high output with low material degradation.
The molten WPC material is shaped through a customized extrusion die.
Die features:
Designed according to door board width & thickness
Optimized flow channel
Stable pressure distribution
KINGSHINE manufactures molds in-house to ensure dimensional accuracy and long service life.
After exiting the die, the board enters:
Vacuum calibration table
Water cooling system
This step ensures:
Accurate dimensions
Smooth surface
No deformation or warping
The haul-off unit pulls the WPC door board at a synchronized speed, ensuring:
Stable extrusion
Uniform thickness
Continuous production
Speed is precisely matched with the extruder output.
Automatic cutting units cut boards to preset lengths.
Options include:
Online cutter
Flying saw system
This improves efficiency and reduces manual labor.
Finished WPC door boards are automatically stacked or transferred for:
Lamination
CNC machining
Door assembly
KINGSHINE offers flexible configurations based on customer needs:
Output range: 150–400 kg/h
Hollow or solid door board design
PVC or PE-based WPC systems
Semi-automatic or fully automatic lines
Each line is customized for factory size, labor cost, and target market.
Cause: Incorrect formulation or poor cooling
Solution: Optimized material ratio + improved vacuum calibration
Cause: Uneven cooling or pulling speed mismatch
Solution: KINGSHINE synchronized control system
Cause: Improper screw design
Solution: WPC-specific high-efficiency twin-screw
As a source factory, KINGSHINE offers:
In-house extrusion line manufacturing
Custom mold & screw design
Turnkey WPC door production solutions
Installation & operator training
Long-term technical support
Our extrusion lines are widely used in Middle East, South America, Eastern Europe, and Southeast Asia markets.
Residential interior doors
Hotel & apartment projects
Bathroom & kitchen doors
Moisture-resistant commercial buildings
Understanding how a WPC door board extrusion line works is the first step toward building a successful WPC door manufacturing business.
With proven technology, stable output, and factory-direct support, KINGSHINE WPC door board extrusion lines help manufacturers reduce costs, improve quality, and scale production confidently.
Contact KINGSHINE to get:
Technical Solution
Machine configuration
Production layout suggestions
Quotation directly from the factory
We help you turn WPC door ideas into profitable production lines.
If you also want to understand the extrusion price factors, you can read WPC Door Board Extrusion Line Price: What Really Affects the Cost?
