In order to produce many kinds of furniture,contemporary chair manufacturers in china will prepare many kinds of wood in the raw material warehouse.
The bending properties of wood of different tree species vary greatly, even the bending properties of different parts of the same tree species on the same tree are different.
Broadleaf wood>Coniferous wood>Soft broadleaf wood;
Young wood, sapwood> old wood and core wood;
Along grain wood>Twill grain wood
Wood bending is the process of softening the wood, bending it into the required curve shape under the action of bending moment, and drying and setting it. Wood cannot be heated and softened by fire, but it can be softened by steam.
It has been verified by production practice that the broad-leaved wood species with better bending properties include elm, oak, ash, beech, and birch, and pine and spruce are better coniferous materials.
The moisture content of the wool has a greater impact on the bending quality and processing cost;
If the moisture content is too low, the wool is easy to break;
If the moisture content is too high, the static pressure will be formed due to excessive moisture when the wool is bent, and it is easy to cause waste, and it will also extend the setting and drying time of the bent parts;
The square lumber with a moisture content of 10% to 15% can be bent directly without softening treatment. The moisture content of the bent wool after softening treatment is preferably in the range of 25% to 30%.
By repeatedly pressing the steam-heated wood on the mold, the contour is finally close to the mold surface to form a thermal curvature, which is suitable for forming open curved bodies, such as seat backs, etc.
Contemporary chair manufacturers have also prepared guide for buying furniture for customers.