Efficient & Intelligent High-frequency woodworking machinery, Begin with 1993
Efficient & Intelligent High-frequency woodworking machinery
Shijiazhuang Cangao High Frequency Machinery Co.,Ltd.
Add：China's Hebei Province, Shijiazhuang City, Luquan District, Shan Yin Town, Green Island Economic Development Zone, Castle Peak Road on the 2nd
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Which method is generally used for solid wood Bending
Large quantities of solid wood Bending require mechanical bending. Mechanical, pneumatic, hydraulic transmission, etc. can be used.
1. Under normal circumstances, the solid wood Bending is to soften the wood, bend it into the required curve shape under the action of the bending moment, and make it dry and set. Wood cannot be softened by heat, but it can be softened by steam. The bending properties of different tree species are very different, even the bending properties of the same tree species in different parts of the same tree are different. It has been verified by production practice that the tree species with better bending performance include elm, oak, ash, beech, birch and other woods for hardwood, and pine and spruce are better for softwood.
2. Solid wood Bending molding is a chip-free solid wood molding process, which can be divided into three stages: plasticizing (softening), bending and shaping (drying and cooling in the model frame). The wood is first planed into squares and then precisely cut to curved lengths. To achieve bendable properties, the wood (ie the workpiece) must be softened by light, which manifests itself as an effect of temperature and humidity.
3. The current traditional softening method is the cooking method, which uses moisture and heat as wood softeners. Generally, the prepared wood will be softened in steam under certain conditions (pressure, temperature, humidity) for a period of time, and the length of time is related to the initial moisture content of the wood, the species of the wood and the thickness of the wood. The most suitable moisture content for solid wood Bending is the moisture content of the wood fiber saturation point, that is, 20%-30%. At this time, the wood strength is the smallest and the deformation that can be generated is the largest.
4. The solid wood Bending manufacturer tells you that wood has very little plasticity under normal conditions, and it is directly bent to form a convex surface that is stretched and a concave surface that is compressed. When the tensile strain reaches about 1%, the fibers on the tensile surface are broken and damaged, and the compressed surface is damaged. Wrinkles are generated, and thus it is difficult to obtain the required bending radius of curvature.