Solid wood plywood has always been recognized by the industry and the consumer market, mainly because of its high-quality output - more durable, more stable, and more environmentally friendly. In fact, there have always been strict standards and requirements for the production of solid wood multi-layer boards. With innovative production technology and perfect advanced equipment, from raw materials to production to output, we abide by the responsibility of every detail to ensure the quality of the board.
Next, I will take you into the Huazhou solid wood multi-layer board production factory to see how the solid wood multi-layer board was born!
01. Selected raw materials, 100% eucalyptus wood core
High density, high lightness, more durable
Selecting good plate raw materials is the foundation and the first step in the production of plates. From the source, we have paid attention to controlling the quality of plates.
Entering the factory, we can first see the storage space of the plates. The raw material of the board is eucalyptus wood with tree age ≥8 years and diameter ≥150mm. Eucalyptus is one of the main tree species in southern fast-growing forests. It not only grows fast, but also has fine tree quality, high strength, high density and good toughness. Furniture has the characteristics of good bearing capacity and not easy to deform, and it is a good raw material for making multi-layer boards.
After the qualified logs are selected, they will be cut, peeled, peeled and then made into veneer, and the veneer is the primary form of each level of the multi-layer board.
02. Drying + 4 hot air drying
Accurately control the moisture content of 8%-10%
The finished log veneer will come to the drying yard for its first drying treatment, which is mainly to control the moisture content of the veneer.
The moisture content of the board has a serious impact on the quality of the board. If the moisture content is too high, the bonding degree of the board will be very low, and it is easy to mold; if the moisture content is too low, the board will be very brittle, affecting its physical and mechanical properties.
The wood multi-layer board adopts the dual combination of drying and thermal drying. First, a large proportion of water-controlled drying effect is achieved through natural drying, and then it is dried through 4 hot air streams. The fully automated intelligent operating system can accurately The moisture content of the board is controlled at 8%-10% to ensure that the moisture content of the board is more uniform, thereby ensuring better physical properties and better gluing effect of the veneer, and it is not easy to deform and crack.
In this way, the processing of the veneer will come to an end, and then it will enter the process of assembling the embryos by machine.
03. Machine-assembled embryos, seamless splicing
Make the thickness of the board uniform and flatter
This link is to splicing the veneer to form a core surface of a single layer of the board. Ordinary multi-layer boards do not pay too much attention to these internal links, and often some veneers with holes and gaps are still used in the process of forming embryos, which results in uneven thickness and poor flatness of the board surface.
The multi-layer board has strict standards for each veneer. The veneers with small scars and no gaps are selected for splicing. The splicing process is also a vertical and horizontal combination, avoiding the same seam at the top and bottom, and using glue lines to connect in the middle. The thickness of the board surface is uniform without unevenness, and it is more flat, which ensures the stability and flatness of the board to a greater extent.
04. Double-layer environmental protection sizing, E0 level
Environmental protection far exceeds national standards
After the machine is assembled and assembled, the veneer needs to be glued. The double-sided environmentally friendly glue used in the multi-layer board can be applied evenly with less glue to achieve a stronger and more environmentally friendly effect.
There are strict requirements for the environmental protection of the board. The glues used are all environmentally friendly glues. The environmental protection level of the produced boards is as high as E0 (formaldehyde emission ≤ 0.06mg/m³), and the environmental performance is far better than the national E1 level standard ( Formaldehyde emission ≤ 0.124mg/m³), giving the consumer market more peace of mind.
05. "7+2+2" three-time hot pressing forming process
Stable and flat, not afraid of deformation
After the sizing process, the veneer comes to the "combination stage", that is, the lamination process. Here, the solid wood veneer is criss-crossed and laminated to realize the transformation from veneer to multi-layer board. The properties of the sheet also have a decisive influence.
Solid wood multi-layer boards are different from ordinary multi-layer boards in the market. The unique "7+2+2" three-time hot-pressing molding process (core plate cold pressing for 3h → high temperature hot pressing for 50 minutes → adding upper and lower 2 layers of surface plates → cold pressing 2 hours → high temperature hot pressing for 20 minutes → adding upper and lower 2-layer panels → cold pressing for 2 hours → high temperature hot pressing for 15 minutes), the bonding strength is much better than that of 1-2 times formed sheets, with stronger physical properties and better smoothness degree, more stable plate structure.
At the same time, the tight vertical and horizontal lamination method also makes the multi-layer board have a better moisture-proof effect. Even in the rainy season in the south, there is no need to worry about the furniture getting wet.
06. Sawing + Sanding
The surface is fine and uniform in thickness, making it easier to decorate
After the "7+2+2" lamination process, the multi-layer board has been basically formed, and then the standard specifications are unified by sawing, and then the surface layer of the multi-layer board is polished through multiple sanding processes to make it more Smooth and delicate, easy for further processing.
07. Class inspection, unified specifications
Achieve high-quality stable output
After the sawing + sanding process, the multi-layer board has a unified specification, but it is still necessary to further check and repair the details. After this link, the multi-layer board without defects can become a multi-layer board Qualified products, and then through the printing of the logo, the plate has a certain degree of recognition and a certain degree of anti-counterfeiting.
After the above steps, the solid wood multi-layer board is the complete birth, and we can get a solid wood multi-layer board with high stability. The solid wood multi-layer boards that meet the product output standards have uniform specifications, the thickness is as high as 18mm, and the materials are very solid.
The pursuit of excellence in details makes the furniture made of solid wood multi-layer boards not only have stable physical properties, but also enhance the service life of the furniture.
From raw materials to production to quality assurance, solid wood multi-layer boards have strict technological processes from beginning to end, which has created its high-quality and stable output, and also achieved its genetic attributes superior to ordinary multi-layer boards on the market.