The technological process of bamboo board is as follows:
First, choose bamboo age. The longer the bamboo age, the shorter the better. Instead, choose bamboo with the right age. Generally, bamboo boards in southern Hunan should be 5-6 years old, and the rod shape should be straight, round and thick. If it is bent, it should be straightened by workers to improve the yield. If the bamboo age is less than 5 years, the accumulation of cell contents is still small, and the micropores between fibers are large, which is easy to cause deformation after drying, and the finished product has large shrinkage and wet expansion coefficient and large geometric deformation, so it is not suitable for use; Bamboo over 5-6 years old is too hard after drying (silicon content increases), and its strength begins to decrease, which is also harmful to tools and should not be used in large quantities. Therefore, for bamboo laminated timber or other bamboo decorative boards, it is best to choose bamboo with a distance of 1.5m, a height of 10m or more and an eyebrow diameter of 5-6 years.
2. Put the bamboo into the equipment. First put the treated bamboo into the jar, and then close the jar door. The specific operation is as follows:
1. First try to close the tank door, observe whether the tank door flange is parallel to the upper, lower, left and right planes of the tank clamp ring, and adjust it in time;
2. After determining the parallelism, start the hydraulic system to tighten the clamping ring;
3. Bamboo vacuum operation: after the door is closed, open the vacuum valve and close all other valves to start vacuum operation and keep the vacuum;
4. Pressurization of bamboo: after vacuum operation, the liquid is washed by negative pressure, and pressurized according to different materials and standards.
3. Softening of bamboo strips: the main material has compact structure, tough material and high tensile strength and bending strength. Soften bamboo strips to make them easy to bend and fix. Several softening methods, such as rapid heating at high temperature (160℃), chemical wetting and focused microwave heating, were tried respectively, which can effectively soften bamboo strips and easily realize bending forming.
4. Bonding and curing: A steam-heated bidirectional press or a high-frequency heated bidirectional press is often used to bond and press bamboo laminated timber.
5. Bending and forming of bamboo strips: the softened bamboo strips are laminated and then tied into bundles with thin iron wires.
6. Forming of bent bamboo strips: Due to the elastic stress of bent bamboo strips. It needs to be dried and shaped under the condition of maintaining pressure, and the fastened mold is put into an oven for drying, and the pressed state is maintained until the predetermined drying degree (water content is less than 10%) is reached.
7. Laminating and gluing: bending bamboo strips are used as a component unit of bending bamboo plywood, the gluing surface of bamboo strips is assembled with blanks, and the special glue for plywood is used for cold pressing and gluing to make bending bamboo plywood with certain specifications and sizes.
8. Blank board blanking: When sawing wood with a blank board, the operator should first carefully read the cutting diagram and the relevant size blanking table, and then process it.
9. Fixed-thickness sanding of plate: Choose fixed-thickness sanding of plate, and require a balanced amount of sanding on both sides of plate to ensure the surface and internal quality of substrate.
The above is the main technological process of bamboo board. Friends who haven't learned this knowledge can follow Bian Xiao's introduction. Unexpectedly, the bamboo furniture we usually see is so beautiful, but in fact the manufacturing process of its main material is so complicated. Bian Xiao took a look and found that many nouns Bian Xiao had never touched before. Perhaps everything we see is exquisite art and superb skill in the production process. Although it is difficult for us to get in touch with each other at ordinary times, these are all interesting knowledge.