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What Are the Features of Softwood

• Low density and soft, lightweight.

• Medium strength and nail-holding ability, easy to work with.

• Straight grain and light color, easy to paint or finish.

• Affordable and widely used for construction and packaging.

Uses of softwood plywood: formwork, walls, roofs, subfloors, packaging, pallets.

Example: albasia wood from Indonesia.

How to Identify Softwood

• Weight and density: light and low density.

• Growth cycle: short growth cycle usually indicates softwood.

Why Softwood Veneer Has Large Thickness Tolerance

1. Wood properties

   • Low density and loose fibers: fibers stretch or compress easily during cutting, causing uneven thickness.

   • Moisture content fluctuations:

     • High moisture → fibers are soft and compress, producing thinner or dented veneer.

     • Low moisture → fibers are brittle and break, causing uneven thickness.

   • Inconsistent fiber direction: irregular grain can deflect the blade, leading to thickness variation.

2. Blade condition

   • Dull or worn rotary knives increase cutting resistance, pulling fibers instead of cutting cleanly.

   • Incorrect blade angle or blade vibration also causes uneven surfaces and higher thickness deviation.

3. Peeling speed and thickness setting

   • Too slow → uneven fiber stress, large thickness fluctuation.

   • Too fast → blade vibration may occur, increasing deviation.

   • Recommended speed: 60–100 m/min.

4. Machine precision

   • Bearings, guides, knife carriage accuracy, and overall machine stability affect cutting uniformity.

5. Log quality

   • Knots, cracks, and density differences between heartwood and sapwood create uneven cutting resistance.

   • Fast-growing softwoods often have many knots and loose fiber areas, making thickness tolerance harder to control.

How to Reduce Thickness Tolerance of Softwood Veneer

1. Select high-quality logs

   • Choose logs with straight and uniform grain.

   • Avoid knots, cracks, and large density differences between heartwood and sapwood to minimize peeling deviations.

2. Blade maintenance

   • Regularly replace or sharpen rotary knives to prevent vibration and uneven thickness.

   • Keep blades sharp and with correct angle to reduce cutting resistance.

3. Improve machine precision

   • Use high-precision machines and components.

   • Employ high-grade bearings and precision rails (e.g., Japanese rails).

   • Heat-treat knife carriage to release deformation stress.

4. Control pressure and tension

   • Design single or double rollers according to softwood density.

   • Adjust roller diameter, drop, and pressure to minimize thickness error.

   • Prevent excessive pressure that can compress or stretch softwood.

5. Match peeling speed and thickness

   • Recommended peeling speed: 60–100 m/min.

   • Too slow → uneven fiber stress; too fast → blade vibration and thickness deviation.

Why Softwood Veneer Surface is Rough?

1. Wood properties

   • Low density and loose fibers: softwood fibers are loosely packed, so cutting often pulls fibers instead of cleanly slicing them.

   • Tear-out is especially likely at knots or where fiber direction changes.

2. Rotary knife condition

   • Dull, worn, or incorrectly angled blades cause incomplete cutting, pulling fibers and creating fuzz.

   • Loose knives or low-precision machines can cause blade vibration, increasing tear-out.

3. Peeling speed and veneer thickness

   • Too slow peeling speed or cutting too thick veneer increases cutting resistance, pulling fibers.

   • Recommended peeling speed: ≥60 m/min.

4. Wood moisture content

   • High moisture → fibers soft and easily pulled → tear-out.

   • Low moisture → fibers brittle → break and produce rough edges.

5. Log quality

   • Knots, cracks, and irregular fiber direction make tear-out more likely.

How to Get Smooth Surface on Softwood Veneer?

1. Use sharp blades

   • High-quality steel knives (e.g., Japanese steel)

   • Correct blade angle

   • Regularly sharpen or replace knives to maintain cutting sharpness

2. Control peeling speed

   • Maintain ≥60 m/min

   • Ensures proper cutting force while minimizing tear-out

3. Manage wood moisture content

   • Pre-dry or condition softwood before peeling

   • Achieve moderate fiber toughness to reduce tear-out

4. Select high-quality logs

   • Avoid logs with many knots or uneven fibers

   • Prefer straight-grain, uniform-density softwood

Guoyu Brand Softwood Rotary Peeling Machine Parameters

• Feeding motor: 11 kW (Servo motor)

• Double rollers: 11 kW × 2 pcs (Siemens motor)

• Single rollers: 7.5 kW × 2 pcs (Siemens motor)

• Rubber roller: 2.2 kW × 1 pc (Siemens motor)

• Cutting motor: 4 kW (Servo motor)

• Peeling thickness: 0.5 – 4.0 mm

• Thickness tolerance: ±0.1 mm

• Peeling speed: 100 m/min

• Log diameter: 50 – 500 mm

• Machine weight: 7 T

Why Guoyu Machine Use Linear Guide Rails in Wood Rotary Peeling Machines

• Precision and Smooth Motion: Ensures the knife carriage moves accurately and consistently, producing uniform veneer thickness.

• Enhanced Stability: Minimizes vibration during cutting, reducing tear-out and surface defects.

• Durability and Longevity: Even load distribution decreases wear on components, extending machine service life.

• Consistent Cutting Quality: Maintains precise knife alignment over long production runs, achieving tighter thickness tolerances.

• Operational Efficiency: Supports higher peeling speeds without compromising veneer quality.

What is the Veneer Quality of Guoyu Veneer Peeling Machine for Indonesia Albasia Wood?