1. Working Principle

Wet veneer sheets are evenly and flatly placed onto a horizontally moving, porous stainless steel (or alloy) mesh belt at the feeding end. The belt carries the veneer through one or multiple drying chambers. In each chamber, high-temperature hot air, driven by circulating fans, is forced vertically through the upper and lower surfaces of the veneer via precisely designed upper and lower air ducts and nozzle systems. This "through-convection" method enables extremely efficient heat and moisture vapor exchange. The veneer moves at a constant speed with the belt, sequentially undergoing preheating, constant-rate drying, and falling-rate drying stages, finally reaching the target moisture content at the discharge end.

2. Key Structural Features

  Conveyance System: Endless stainless steel mesh belt supported by drive and tension rollers, with stepless speed adjustment.

  Drying Chamber: Divided into multiple independent zones with controlled temperature and humidity, allowing precise programming of drying schedules.

  Air Circulation System: Each section has independent centrifugal fans, heaters (steam finned tubes / thermal oil tubes / gas hot air furnaces, etc.), and air distribution devices to ensure uniform air volume and velocity.

  Casing: Color steel plate exterior with high-quality insulation filling, saving energy and improving the workshop environment.

 Moisture Exhaust System: Equipped with automatically or manually adjustable exhaust dampers to promptly remove humid air.

3. Main Advantages

  Superior Drying Quality: Vertical through-airflow ensures even heating on both sides, resulting in excellent moisture content uniformity. This significantly reduces veneer defects like warping, checking, and distortion, greatly improving grade yield.

  Excellent Versatility: Particularly suitable for drying thin veneer (e.g., 1.0-2.0mm). Highly adaptable to different wood species (especially prone-to-warp species like poplar, eucalyptus) and varying initial moisture contents, with very low breakage rates.

  High Automation: Easily integrated into continuous, automated production lines with preceding and subsequent processes (e.g., peeling, clipping, splicing).

  Advanced Technology: Modern models are typically equipped with PLC and touchscreen HMIs, capable of storing multiple drying schedules and offering precise control over process parameters (temperature, humidity, air speed, belt speed).

  Enhanced Durability: Key components exposed to hot, humid air (e.g., inner chamber, ducts, mesh belt) can be made of stainless steel for corrosion resistance and long life.

4. Typical Applications

The mainstream choice for modern, large-scale, high-quality plywood production lines, especially for manufacturing products like concrete formwork and furniture panels that demand high veneer flatness and quality.