Imitation black walnut technology wood manufacturing technology

Natural precious wood such as black walnut is a high-grade decorative material, which is popular among people. Although its price is 10,000-20,000 yuan/m3, it is still welcomed by the market, but its resources are becoming less and less. The application of wood-based panels can replace 1m3 of wood with 3m3 of wood. In terms of infrastructure, interior decoration, furniture, transportation, water conservancy construction, etc., wood-based panels have been used in recent years, especially with the rise of renovation, wood-based panels. Has become an indispensable and important role. According to the latest statistics, in 2001, the output of China's wood-based panels reached 21,108,200 m3, including 5,701,100 m3 of fiberboard, 3,445,300 m3 of particleboard, 9,060,600 m3 of plywood, and 2,921,200 m3 of other wood-based panels. In the next 15 years, China only needs 30 million m3 of wood-based panels in the construction, furniture and decoration industries. It is estimated that by 2010, the output of wood-based panels will reach 35 million m3 to meet social needs. A large number of wood-based panels require high-quality wood veneers for veneer decoration. Wood dyeing is an effective method to increase the added value of inferior wood, especially fast-growing hardwood. It is a high-tech processing method for wood, so it simulates the texture and color of precious wood such as black walnut, and uses quick-growing wood dyeing veneer for paulownia and poplar. The technology of precious wood came into being, and its products are increasingly popular. At present, its products have a large potential market and considerable profit margin.

(1) Science and Technology Wood

The science and technology wood is a dyed veneer lumber. It is a man-made board with a large format which is made of a small-diameter wood, which is subjected to bleaching and dyeing, multi-layer parallel gluing, and hot pressing to produce a certain thickness. The imitation black walnut wood is a rotary cut veneer that uses fast-growing wood such as paulownia and poplar. It is made into a man-made board with a texture color similar to that of natural black walnut by bleaching, dyeing, gluing, hot pressing and the like. The technology is used in large materials and inferior materials, which can greatly increase the added value of fast-growing wood and alleviate the shortage of natural precious wood in China.

(two) process

Veneer → Glue → Billet → Preload → Compression Glue → Saw Side → Packing

1. veneer

Rotary cut veneer, thickness 0.7 ~ 1mm, depending on product use, wood variety and production process requirements. The thickness is uniform, and the width is cut into a width of 600, 750 mm and the like.

2. Glue

Glue with a glue applicator. The adhesive used is a formulated adhesive which is divided into a colorless gel and a colored gel. Colorless glue contains adhesives, catalysts, fillers, and the like. The color of the colored glue should be close to the color of the veneer, the basic composition is the same as the colorless glue, and it also contains a small amount of dye or pigment.

3. Blank

On the small pusher, the blanks are assembled, parallel coded, the ends and the two sides are aligned, pay attention to the repair and repair of the broken veneers. Usually a finished board consists of 1000 veneers. If the texture of the product is different, consider the interaction and orderly discharge of the boards in different shades of color.

4. Preload

The sheet is pre-cured to impart a certain initial strength.

5. Compression gluing

The role of this process is to ensure that the product is fully glued under a certain pressure and that excess water is discharged. Reasonable process, giving the product sufficient strength, suitable moisture content and uniformity. The temperature and time depend on the compression bonding method, the type of glue, and the thickness of the board. If it is unreasonable, it will cause defects such as discoloration, cracking and bending of the product. Generally, the compression bonding method includes several forms such as hot pressing, cold pressing, and high frequency compression.

Products with parallel texture during hot pressing do not require a special template. To produce a mountain product or a special texture product, different hot pressing templates are required.

6. Saw

According to the needs, the materials are made at different angles, and the finished board is 5cm thick.

7. package

Product inspection is graded according to product color, texture and defects. Waterproof coating is used to seal the ends to prevent cracking. Packaging, labeling.

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