Plywood craft

Plywood craft

author: Plywood craft
2022-10-31
Plywood craft
Plywood craft

Plywood is one of the three major panels of man-made panels. Plywood is a three-layer or multi-layer plate-like material made of wood segments that are cut into veneers or sliced ​​into veneers by wooden squares, and then glued with adhesives, which can greatly improve the utilization rate of wood.
Plywood has good stability, high hardness, high temperature resistance, good moisture resistance, rich texture and close to nature, and low price. It is an excellent choice for building furniture and building decoration.
Made of plywood, it is a three-layer or multi-layer plate-like material made of wood segments that are cut into veneers or sliced ​​into veneers, and then glued with adhesives, usually with odd-numbered layers of veneers. , and the fiber directions of adjacent layers of veneers are glued perpendicular to each other.
The process flow of plywood is as follows:
Logs--cutting--rotating--cutting--drying--sorting--finishing--
gluing--group blanks--cold pressing--repairing--hot pressing--sanding--edge trimming-- Sanding - Finished Product Inspection - Packaging - Warehousing

1. Wood segment rotary cutting, which provides the basic structural unit for plywood production - rotary cutting veneer, the production process is log truncation wood segment softening wood segment peeling wood segment rotary cutting veneer finishing;
2. Drying: After the veneer is unscrewed, it is a wet veneer and needs to be dried;
3. Veneer repair, splicing, and grouping: There are natural defects such as knots and skins in the process of tree growth. The veneer after peeling has natural defects and processing defects. After grading, the veneer needs to be repaired, vertical and horizontal. To splicing to meet plywood production requirements. The plywood is usually assembled according to the principle of odd-numbered layers and front and back symmetry, and the veneer is divided into a glued layer and a dry board layer. . According to the plywood specification, veneer texture staggered, odd-numbered layer symmetry principle, slab hot pressing compressibility, design the thickness of each layer of veneer and matching method, and calculate the number of glued layers and dry boards.
4. Glue adjustment: Adhesive is a bridge for veneer bonding, mainly composed of amino synthetic resin, curing agent, filler, modifier and so on.
5. Veneer gluing, forming, pre-pressing (cold pressing): gluing, forming and pre-pressing are continuous operations. The correct process after the combination of dry and wet boards is that gluing is first, and the forming is last. , to realize the integration of gluing and assembling.
6. Slab repair, hot pressing (gluing), and curing: Slab repair is the last compensation measure before hot pressing. Repair; slab hot pressing realizes the curing of the adhesive, so that the strength of the veneer meets the requirements of the national standard; the curing process is not only a process of eliminating internal stress, but also a process of complete curing of the adhesive under the action of residual temperature.
7. Substrate greasy repair and thickness-fixed sanding: The well-maintained wool board enters the greasy repair and sanding process.
8. Surface veneer, sanding, trimming: the process of surface veneer: surface and bottom plate matching glue adjustment gluing assembling cold pressing repairing, cold pressing hot pressing sanding; finally the plate Cut to size.