LVTT structure fan blade based on fast-growing eucalyptus engineered wood

Abstract

The utility model discloses an LVTT structure fan blade based on fast-growing eucalyptus engineered wood, which is provided with a five-layer structure, the middle layer is a longitudinal veneer, the transverse veneer is tightly attached to the middle layer, the longitudinal veneers are arranged on the upper surface and the lower surface, and the layers are adhered by glue. The transverse veneers and the longitudinal veneers are formed by slicing eucalyptus technical battens in different directions, the middle layer is used as the reference between the upper layer and the lower layer, and the thicknesses of the corresponding layers are the same. According to the LVTT structure fan blade based on the fast-growing eucalyptus engineered wood, on one hand, the size stability of the fan blade is improved, on the other hand, the fast-growing eucalyptus can achieve high-value synergistic utilization, cost and resources are saved, and high practical value is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of technical wood, in particular to a LVTT structure fan blade based on fast-growing eucalyptus technical wood. Background Art

[0002] Although artificial forests grow faster, they have fewer tree species, smaller diameters, poor materials, and are prone to deformation, decay, and borers, which cannot meet the requirements of high-end utilization. Today, with the application of technology wood technology, ordinary fast-growing wood has achieved a "big transformation". Through computer simulation design, veneer dyeing, adhesive coloring, molding and other technologies, it has the wood texture, color, and smell of various precious tree species, and even more artistic effects. Technology wood does not have the natural defects inherent in natural wood such as insect holes, knots, and color changes. It is a decorative material with almost no flaws. At the same time, its texture and color have a certain regularity. When applied to fan blades, it can well avoid the trouble of difficult splicing caused by differences in texture and color of natural wood products, so that consumers can make full use of every inch of the material they buy. However, if technology wood is directly used on fan blades, there will be many problems such as warping, deformation and cracking during use. Technology wood should be better applied to fan blades through technical processing. Utility Model Content

[0003] The utility model aims to provide a LVTT structure fan blade based on fast-growing eucalyptus technical wood, so as to solve the problems of warping, bending and cracking of fan blades in the background technology and greatly improve the service life.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A LVTT structure fan blade based on fast-growing eucalyptus technical wood has a 5-layer structure, the middle layer is a longitudinal veneer, the lateral veneer close to the middle layer, the upper and lower surfaces are longitudinal veneers, and the layers are glued together; the lateral veneer and the longitudinal veneer are both sliced ​​from eucalyptus technical wood in different directions.

[0006] The transverse veneer and the longitudinal veneer are both sliced ​​from eucalyptus wood, and the upper and lower layers are based on the middle layer, and the thickness of the corresponding layers is the same.

[0007] The glue is melamine-modified urea-formaldehyde resin.

[0008] The amount of melamine-modified urea-formaldehyde resin applied between the layers is not less than 167 g / m2.

[0009] The fan blades are compressed after being pasted, and the compression ratio is 0.85.

[0010] The thickness of the middle layer is 1.7 mm, the thickness of the two side layers is 1.4 mm, and the thickness of the two outermost layers is 1 mm.

[0011] By adopting the above technical solution, the utility model has the following advantages and beneficial effects:

[0012] The utility model uses eucalyptus as raw material, and makes technical wood blocks of different sizes, which are then sliced ​​into thin boards of different thicknesses, and made into 5-layer LVTT structure fan blades, which are staggered horizontally and vertically, have better stability, and improve the practical value of eucalyptus. The preparation of LVTT structure fan blades using artificial fast-growing forest eucalyptus as raw material can effectively utilize fast-growing eucalyptus resources, improve the resource utilization rate and added value of eucalyptus, solve the raw material problem of high-end wooden surface decoration materials for the wood surface decoration industry, reduce production costs, increase product profit margins, and generate huge economic benefits. The horizontal and vertical staggering also improves the dimensional stability of the fan blades. The symmetrical arrangement of the upper and lower layers based on the middle layer and the staggered texture of the wooden boards between the layers improve the strength of the fan blades, so that the fan blades have the stability to remain straight. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic structural diagram of a LVTT structure fan blade based on fast-growing eucalyptus technical wood provided in a specific embodiment of the utility model.

[0014] Figure 2 Schematic diagram of the horizontal single board structure.

[0015] Figure 3 Schematic diagram of the longitudinal single board structure. DETAILED DESCRIPTION

[0016] To further illustrate the present invention, the present invention is described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely for the purpose of explaining the present invention and are not intended to limit the present invention.

[0017] Example 1

[0018] like Figure 1 As shown, the utility model is a LVTT structure fan blade based on fast-growing eucalyptus technological wood, including five layers, wherein the middle layer is a longitudinal veneer with a thickness of 1.7 mm, the two side layers are transverse veneers with a thickness of 1.4 mm, and the outermost two layers are longitudinal veneers with a thickness of 1 mm. Each layer is glued with melamine-modified urea-formaldehyde resin. To ensure the fastness of bonding, the amount of melamine-modified urea-formaldehyde resin applied is not less than 167 g / ㎡, and the melamine-modified urea-formaldehyde resin is applied by roller coating, hot pressing after application, and cooling after hot pressing. In the hot pressing step, the hot pressing time is 25 minutes, the pressure is 17 MPa, the hot pressing temperature is 110°C, and the compression ratio of the fan blade structure is 0.85.

[0019] Furthermore, the transverse veneer is obtained by:

[0020] After gluing, the fast-growing eucalyptus boards are pressed into technical wooden squares of 2550*1250*850mm, and then cut in a plane parallel to 2550*1250, cut into a thickness of 1.4mm, and the cut size is 2550*1250*1.4mm.

[0021] Furthermore, the longitudinal veneer is obtained by:

[0022] After gluing, the fast-growing eucalyptus board is pressed into a 2550*850*1275mm technology wood square, and then cut at half of the 2550 position with a plane parallel to 850*1275, and the 2550*850*1275mm technology wood square is cut into two, and the two small technology wood squares cut out are glued and stacked and pressed together to form a new technology wood square with a molding size of 2500*1275*850mm. Then it is sliced ​​according to the required thickness with a plane parallel to 2500*1275mm, and cut into 1.7mm thick longitudinal veneer.

[0023] The fast-growing eucalyptus technical wood veneer sliced ​​from eucalyptus technical wood squares of 850*1220*2440mm and 2440*850*1220mm is roller coated with glue and hot pressed, then cooled, sanded and sawed to form the finished product. The LVTT structure fan blade is preferably selected, and the glue used in the roller coating step is urea-formaldehyde resin modified by melamine that meets the ENF standard, with a total of four layers, and the glue amount of each layer is 500g, and the glued area is 1220*2440mm.

[0024] Press the horizontal and vertical boards Figure 1 After cold pressing, the corresponding LVTT structure fan blades can be manufactured through cutting, polishing, hole opening and other processes.

[0025] The main features of the utility model are described above. Those skilled in the art should understand that the utility model is not limited to the above embodiments. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A LVTT structure fan blade based on fast-growing eucalyptus technical wood, characterized by: It has a 5-layer structure, the middle layer is a longitudinal veneer, the veneer close to the middle layer is a transverse veneer, the upper and lower surfaces are longitudinal veneers, and the layers are glued together; the transverse veneer and the longitudinal veneer are both made of eucalyptus technology wood planks sliced ​​in different directions.

2. The LVTT structure fan blade based on fast-growing eucalyptus technical wood according to claim 1 is characterized in that: The upper and lower layers are based on the middle layer, and the thickness of the corresponding layers is the same.

3. The LVTT structure fan blade based on fast-growing eucalyptus technical wood according to claim 1 is characterized in that: The glue is melamine-modified urea-formaldehyde resin.

4. The LVTT structure fan blade based on fast-growing eucalyptus technical wood according to claim 3 is characterized by: The amount of melamine-modified urea-formaldehyde resin applied between the layers is not less than 167 g / m2.

5. The LVTT structure fan blade based on fast-growing eucalyptus technical wood according to claim 1 is characterized by: The fan blades are compressed after being pasted, and the compression ratio is 0.

85.

6. The LVTT structure fan blade based on fast-growing eucalyptus technical wood according to claim 1 is characterized by: The thickness of the middle layer is 1.7 mm, the thickness of the two side layers is 1.4 mm, and the thickness of the two outermost layers is 1 mm.

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