First step is to fell the trees. There used a high powered chain saw to fell large trees. And the fallen tree is reduced into smaller pieces by a chainsaw. These tree trunks, or logs, are then dragged to a loading area using heavy vehicles. These logs are transported to the plywood mills where they are arranged in long piles known.
How Is Plywood Produced in Factories?
The logs are soaked and heated to soften the wood，before the veneers can be cut into desired shapes and sizes. This whole process takes anywhere from 12 to 40 hours depending on the type of wood.
The treated logs are transported to a peeler lathe where they are fed to a full-length knife blade one log at a time. This reduces the diameters of the block to about 3 to 4 inches, any remaining wood is removed from the lathe and a new log is entered in its place.
The next process is to cut the veneer into usable widths according to the industry’s requirements for plywood sheets. It is common to arrange the veneer according to their grades. This can be done manually or via optical scanners. The veneer is stored in a low-humid area, known as a dryer to reduce the moisture content of the wood and to shrink the veneer’s size.
These sections of veneer are installed in certain arrangements, crossways or crossbands, depending on the client’s specifications.
A waterproof adhesive is then used to assemble appropriate sections of the veneer. This is usually one manually. Once the glue is properly applied to the sheets, the plywood is sent to a hot press that can handle around 20 to 40 sheets at a time. The hot press creates extreme temperature and pressure settings of around 200 psi and 310 ° F. This establishes good contact between the layers of veneer and allows the glue to achieve its maximum potential.
These sheets are then passed through a set of precisions saws to trim them to accurate widths and lengths. The finished plywood sheets are stamped with appropriate information such as grade, mill number, and other factors.
Related Information
Global Film Faced Plywood Market Size 2021-2026
the property of Plywood