Process flow of plywood production

The production process of plywood mainly includes the following steps:
Raw wood processing: Firstly, the raw wood is sawn and peeled, and then subjected to rotary cutting to obtain veneers.
Single board processing: Dry the veneer obtained by rotary cutting to ensure its moisture content is suitable for subsequent processing.
Glue application: Apply glue evenly on the veneer, and the amount of glue should be controlled within an appropriate range. Too much or too little glue can affect the strength and quality of the plywood.
Assembly: Assemble the glued veneer according to the principle of symmetry and perpendicular wood grain direction.
Pre pressing: Pre pressing is performed before hot pressing, usually using cold pressing to ensure a tight bond between the veneers.
Hot pressing: Place the assembled veneer into a hot press machine for hot pressing to fully solidify the adhesive solution and form plywood.
Edge cutting and sanding: After hot pressing, the plywood is subjected to edge cutting and sanding treatment to ensure its size and smooth surface.
Inspection grading: Inspect the finished products and grade them according to quality standards.
Packaging and storage: Finally, the qualified plywood is packaged and stored in the warehouse.
Types and application areas of plywood:
Classified by purpose: ordinary plywood and special plywood. Ordinary plywood is suitable for a wide range of applications, while special plywood meets specific needs.
Divided by layers: plywood, plywood, multi-layer plywood.
According to quality standards: Class I, Class II, and Class III plywood. Class I plywood is weather resistant and suitable for outdoor use; Class II plywood is water-resistant and suitable for cold water environments; Class III plywood is moisture resistant and suitable for indoor use.
Factors affecting the quality of plywood:
Wood type: Different woods have different densities and structures, which affect the amount of glue applied and the bonding effect.
Glue application amount: Excessive or insufficient glue application can affect the strength and quality of plywood.
Veneer quality: The dryness and surface treatment of veneers directly affect the final quality of plywood.
By following the above steps and precautions, we can ensure the production of high-quality plywood that meets the needs of different fields.