Office Chair Wood Processing

Office chair wood processing involves key steps such as wood pretreatment, structural component forming, connection structure treatment, and detailed sanding and painting protection.

Wood pretreatment is the foundation of processing. First, material screening and grading are carried out. Wood is graded based on its density, hardness, grain direction, and potential defects to select suitable materials for manufacturing office chairs, with oak, walnut, and maple being commonly used. Then, drying treatment is performed to reduce the wood's moisture content to the range of 8%-12%, which is in balance with the average annual air humidity of the usage location. This reduces the wood's shrinkage and swelling properties and prevents issues like cracking and deformation in the finished product. After drying, the wood undergoes stress relief and seasoning, being left to rest for several weeks in a seasoning warehouse with constant temperature and humidity to release residual stress and stabilize the fiber structure.

In the structural component forming stage, cutting and rough processing are done first. According to the layout plan, a CNC panel saw or band saw is used for cutting, and then planers and milling machines are employed to process the wood to the standard thickness and width, forming rough blanks. Next is precision contour processing, where a CNC engraving machine is used to mill, drill, and slot components such as chair backs, armrests, and legs based on a 3D digital model, achieving one-time forming of complex surfaces and high-precision connection structures.

For connection structure treatment, high-end solid wood office chairs often adopt a combination of traditional mortise-and-tenon joints and modern hardware. Improved mortise-and-tenon structures, such as oval tenons and finger joints, ensure the stability of component connections. Meanwhile, combining them with metal connectors can meet the requirements for adjustable functions of office chairs (such as height adjustment and tilt).

Detailed sanding and painting protection are the final crucial steps. The edges and corners of the entire chair are carefully sanded to remove burrs and sharp edges, improving safety in use. Then, an environmentally friendly wood finish is applied to the chair. Transparent or colored finishes can be chosen and evenly coated on the chair's surface to both protect the wood and enhance its aesthetics.