Plywood production

Plywood production

2023-02-06
Plywood production
Plywood production
Plywood is a three-layer or multi-layer board material made of wood segments peeled into veneer or wood planing into veneer, and then glued with adhesive. It is usually made of odd layers of veneer, and the fiber directions of adjacent layers of veneer are perpendicular to each other. Plywood not only has all the advantages of natural wood, such as light volume weight, high strength, beautiful texture, insulation, etc., but also can make up for some defects of natural wood, such as knots, small size, deformation, large differences in vertical and horizontal mechanics, etc. Plywood is one of the commonly used materials for furniture, which can be used for interior decoration of doors and windows. It can be used as the panel and back plate of tables and cabinets in furniture production; As one of the three major wood-based panels, it can also be used as functional materials for aircraft, ships, trains, automobiles, buildings and packaging boxes. Plywood can improve the utilization rate of wood and is a main way to save wood. Plywood has become an indispensable raw material for the production of interior furniture and decoration, so the quality of plywood affects the overall quality of the home
Chinese name: plywood
Foreign language name: Plywood
Essence: plate material
Category: odd layer board
Alias: multilayer board; Laminate
Do according to odd number: 3-13 layers
Features: small deformation; Small shrinkage; Surface leveling
By use: ordinary plywood; Veneer plywood
Divided by logs: hardwood plywood; Coniferous gum plywood
Grade: superior product; First class products; Qualified products
Application: partition; Ceiling; Dado; Facade
Leader Plywood is a kind of three or more layers of plate-like material, which is made of wood segments peeled into veneer or wood planed into veneer, and then glued with adhesive. In order to improve the anisotropic properties of natural wood as much as possible and make the plywood uniform in properties and stable in shape, two basic principles should be observed in the structure of plywood: one is symmetry, and the other is that the adjacent layers of veneer fibers are perpendicular to each other. The principle of symmetry requires that the veneers on both sides of the symmetrical central plane of the plywood, regardless of wood properties, veneer thickness, number of layers, fiber direction, moisture content, etc., should be symmetrical with each other. If the structure of plywood meets the above two basic principles at the same time, its number of layers should be odd. So plywood is usually made of three, five, seven and other odd layers
Use of plywood
Plywood is a kind of board which is formed by spinning and cutting logs into large pieces of veneer in the direction of annual ring, drying and gluing, and then assembling and gluing according to the principle that the grain direction of adjacent veneer layers is perpendicular to each other. The veneer is mature into odd layers.
Plywood is one of the most effective ways to save wood in China, which can improve the current utilization rate. Most of them are used to make furniture, and can be used to make kitchen cabinets, lockers, bathroom cabinets, floors, partitions, and stair lights; Sometimes it is also used to make packaging boxes for some large instruments, such as aircraft, ships, trains, cars, etc; There are also building plywood, such as building exterior decoration and concrete formwork, which are mainly used for ceiling, wall skirt, floor lining board, etc
How to select plywood
1. Plywood has positive and negative differences. When selecting, the watch board should have large lines and clear patterns, the front side should be smooth and smooth, not rough, and should be flat without stagnation.
2. Plywood shall be free of defects such as damage, bruise, hard injury, scar, etc.
3. Plywood shall be free of degumming.
4. Some veneers in plywood are spliced together by smaller veneers, so in selection, attention should be paid to the tightness of the joint of veneers. The separation of veneers affects the strength, and the overlap of veneers will produce uneven phenomenon.
5. When selecting plywood, attention should be paid to the selection of non-glued plywood. If the sound is crisp when knocking on each part of the plywood by hand, it indicates that the quality is good. If the sound is dull, it indicates that there is glue opening in the plywood.
When selecting plywood, attention should be paid to the uniform color and texture of the panel, and the color of the wood should be consistent with the color of the furniture paint

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