Tools and Materials
Methods To Bend Plywood
Plywood can be bent through various methods like kerf cutting, lamination, steam bending, flexible plywood, hot pipe bending and cold form bending.
Kerf Cutting
Kerf cutting involves making a series of parallel cuts along the backside of the plywood where a bend is desired. This technique removes material to make the wood flexible and bend easily. It is important to calculate the depth and spacing of the cuts properly to get a smooth curve without breaking the wood.
Lamination
Plywood lamination involves gluing thin strips of wood veneers over a form of mold to get the desired curve. Once the wood glue is dried, the wood retains the shape of the form. This process is ideal for creating strong, stable curves with a smooth face, free of cuts or joints.
Steam Bending
Steam bending is used for solid wood, but thin sheets can also be bent using steam. The plywood is exposed to steam in a steam box to soften the fibers before getting into a form. This process allows for bends without cuts but takes up time and needs control.
Hot Pipe Bending
Thin sheets of plywood can be softened and bent over a hot surface using a hot pipe or tube. The hot pipe is rolled over the plywood sheet for bending it. Steam is also used for more warmth to bend the plywood easily. This method is best for small projects with thin sheets that require slight curves.
Cold Form Bending
Thin sheets of plywood are bent and shaped over a form and glued together. These forms are made with various materials like plastic, MDF or even sturdy cardboard. The plywood is cut as per the shape and then glued over the form. The plywood is secured with a clamp or a strap to hold the shape and apply pressure. It takes a day’s time for the plywood to bend and gain the shape of the form.
How To Bend Plywood The Easy Way
Before you start the project, it is important to choose the right kind of plywood. Look for thin sheets, as they are easier to bend.
Wear gloves and safety glasses when cutting plywood. You can take help of another member at your home for safety measure while using a table saw.
Keep the inner parallel cuts uniform for even bending.
Some wood types, really bends well after steaming like white oak, red oak and ash.
Remove the wood from the steam box after the suggested time. If you see water running down the face of the board, then it is likely to break.
Go slow with the bending process to avoid cracking the wood and potentially hurting yourself if the board snaps improperly.