Blockboard is commonly known as big core board, which is made of two pieces of veneer, glued and spliced together. The middle plank is made of fine planks after being dried, processed into a certain specification of wooden strips, and spliced by a splicing machine. The spliced wooden boards are covered with two veneers on both sides, and then they are made by cold and hot presses. Blockboard follows the principle of symmetry in the production process, which effectively overcomes the anisotropy of wood, has high lateral strength, and avoids warping and deformation of the board. Blockboard has good screw-holding power, high strength, and a wide range of uses. It is mainly used in furniture manufacturing, door panels, wall panels, etc.
The finger joint board is made up of multiple wooden boards spliced together, and the plywood is no longer glued up and down. Because the vertical board adopts a serrated interface, which is similar to the cross butt of the fingers of two hands, it is called a finger joint board. Finger-joined board has the same purpose as blockboard, except that the amount of glue used in the production process is much less than that of wood-based board, so it is a more environmentally friendly board than wood-based board. At present, more and more People began to choose finger joint boards to replace blockboard. There is no need to paste the splint on the finger joint board and the amount of glue is greatly reduced.
The production process of the finger joint board is as follows: log cut short-sliced into slats-enter the special drying equipment for drying modification-separate inspection according to different colors and defects-first planing-opening falcon-extension-imposition-drying -Sanding-filling ash-sanding-polishing. Cutting wood into units of different shapes and recombining them into various boards in a certain way can improve certain properties of wood, such as anisotropy, heterogeneity, swelling and shrinkage. Plates composed of large units have higher mechanical strength, and plates composed of small units have better homogeneity. Finger joint boards are mainly used in high-quality materials such as furniture, cabinets, and wardrobes.
The production process of blockboard and finger joint board is very demanding, not only need enough space to allow the wood to have enough time for adaptive natural drying, but also strict drying process control.