Manufacturing and processing technology for high-quality formed ginkgo wood furniture

Abstract

The invention discloses a high-quality formed ginkgo wood furniture manufacturing and processing technology, and relates to the technical field of furniture production, and the high-quality formed ginkgo wood furniture manufacturing and processing technology comprises ginkgo wood selection, ginkgo wood treatment, wood modification, part processing and surface treatment. Before drying, the cut ginkgo biloba boards are subjected to primary treatment, surface impurities are removed, and primary balance treatment is carried out, so that stress concentration in the later drying process is reduced; primarily drying the primarily treated wood, adjusting the thickness and the drying temperature and humidity of the wood, adjusting the temperature in the drying chamber according to the thickness and the initial water content of the wood by using a combined drying technology, and controlling the distance between the wood to be 1 / 10-1 / 8 of the width of the wood through a circulating air drying system. By means of the combined drying technology, dynamic control over the ginkgo wood drying quality is achieved, the problems that the drying process is complex and wood is prone to warping or cracking during drying are solved, the drying period is shortened, wood deformation and cracking are reduced, the physical performance of the wood is improved, and the drying efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of furniture production, in particular to a manufacturing process for high-quality molded ginkgo wood furniture. Background Art

[0002] With the improvement of people's living standards and the continuous pursuit of quality of life, the market demand for wooden furniture industry has grown rapidly. Ginkgo wood, as a wood with excellent texture and unique texture, has gradually been used in furniture making. With its unique charm and high quality, ginkgo wood furniture caters to the aesthetic and practical needs of modern people for home environment. In addition, the society's emphasis on environmental protection and sustainable development has also prompted the development of ginkgo wood furniture manufacturing and processing technology in a more environmentally friendly and efficient direction.

[0003] Ginkgo is a relict tree species unique to China from the Quaternary Ice Age. It is known as a "living fossil", "national treasure" and "national tree" and enjoys a very high reputation. As a rare tree species, the wood of ginkgo is also regarded as a precious resource. At present, ginkgo trees are widely distributed in the temperate and subtropical regions of my country. From a macroscopic perspective, the structure of ginkgo wood is uniform and delicate, with unique texture and color, and small shrinkage (volume shrinkage coefficient 0.305%), making it an ideal furniture material. However, ginkgo wood is light in weight (air-dry density 0.436g / m 3 ), soft and low strength, which limits its widespread application in the furniture industry.

[0004] Therefore, it is very necessary for the present application to propose a high-quality molding ginkgo wood furniture manufacturing and processing technology to solve the problems in the background.

[0005] 1. Patent document CN111605022B discloses a process for manufacturing and processing redwood furniture. The above patent can solve the problem existing in the docking of existing vertically arranged boards: the boards cannot be accurately positioned, resulting in deviations in the connection between the boards. It is necessary to manually align the boards when they are plugged in to prevent the deviations in the board connection from causing damage to the mortise or tenon. However, the above patent cannot dynamically control the drying quality of ginkgo wood.

[0006] 2. Patent document CN109531755B discloses a method for processing high-quality classical furniture. The above patent achieves the advantages of simple process, delicate production, no cracking and deformation, stable performance and long service life. The produced furniture is of good quality, high-end, exquisite and atmospheric, and the surface of the furniture is smooth and textured, and the furniture is not easy to crack. However, the above patent cannot achieve the function of easy disassembly and assembly and stable structure.

[0007] 3. Patent document CN111687720B discloses a manufacturing process for ceramic cabinet handles for customized furniture for the whole house. The above patent realizes a relatively traditional polishing method, which has a wider range of applications, higher practicality, and high work efficiency. However, the above patent cannot achieve the function of filling the defects of the wood itself.

[0008] 4. Patent document CN108943300B discloses a method for making special-shaped furniture. The above patent realizes a simple process without changing the processing technology of traditional furniture. It can improve the performance of furniture by only adding the process of pasting glass fiber cloth to the traditional process. It is suitable for the production of any furniture, especially for the production of special-shaped furniture. However, the above patent cannot achieve the function of shortening the processing cycle.

[0009] In summary, the above patent cannot achieve the functions of dynamically regulating the drying quality of ginkgo wood, easily disassembling and assembling the structure to stabilize it, filling the defects of the wood itself, and shortening the processing cycle, resulting in a complicated drying process and easy warping or cracking of the wood during drying. The utilization rate of the whole ginkgo tree is low, and the wood itself has a large number of irregular and scattered random spot-like scars, resulting in poor aesthetics.

[0010] To this end, the present application proposes a high-quality molding ginkgo wood furniture manufacturing process that can achieve the functions of dynamically regulating the drying quality of ginkgo wood, easily disassembling and assembling to ensure a stable structure, filling the defects of the wood itself, and shortening the processing cycle. Summary of the invention

[0011] The purpose of the present invention is to provide a high-quality molded ginkgo wood furniture manufacturing and processing technology to solve the technical problems proposed in the above background technology that the drying quality of ginkgo wood cannot be dynamically controlled, the function of easy disassembly and assembly with stable structure, the function of filling the defects of the wood itself and the function of shortening the processing cycle cannot be realized, resulting in a complicated drying process and the wood is easy to warp or crack when dried, the utilization rate of the whole ginkgo tree is low, and the wood itself has a large number of irregular and scattered random spot-like scars resulting in poor aesthetics.

[0012] To achieve the above-mentioned object, the present invention provides the following technical solutions: a high-quality molded ginkgo wood furniture manufacturing and processing technology, including ginkgo wood selection, ginkgo wood treatment, wood modification, parts processing and surface treatment;

[0013] The specific steps of ginkgo wood processing are:

[0014] First, 3D laser scanning technology is used to obtain the shape data of the log, mark the defects, and import the model into the CNC jigsaw for cutting;

[0015] Before drying, the cut ginkgo wood boards are preliminarily treated to remove surface impurities and undergo preliminary balancing treatment to reduce stress concentration during the subsequent drying process;

[0016] Use the wood after preliminary treatment for preliminary drying, adjust the thickness of the logs and the drying temperature and humidity, use the combined drying technology, adjust the temperature in the drying room according to the thickness and initial moisture content of the wood, and use the circulating air drying system to ensure that the hot air flows evenly in the drying room. The distance between the wood is controlled at 1 / 10-1 / 8 of the width of the wood;

[0017] The main drying temperature is raised from the initial 30℃ to 60℃, and the relative humidity is maintained at 40%-60%. The drying time is 1-2 weeks, and the moisture content of the wood is finally reduced to 8%-12%. During the drying process, the moisture content of the wood is tested every three days. The wood is turned by the drum. Before the end of the drying process, the wood is subjected to high temperature and high humidity treatment; after the drying is completed, the wood is placed in a humidity environment of 55% for a week of stress release treatment;

[0018] The specific operations of parts processing are:

[0019] Use 3D modeling to design furniture, simulate the stress of furniture in different environments in real time, and use process simulation software to simulate the moisture content change and stress distribution of wood under the combined drying process. Optimize the structural design, complete the component splitting, and conduct modular design. Use a flexible production system for component processing. Adjust the production process and process according to the customer's personalized customization needs. Use 3D printed models for trial and adjustment when the customer requires to preview the furniture effect.

[0020] Laser cutting is used to cut base materials in large quantities. The CNC machining center processes wood into parts according to the imported furniture design drawings with an error control within ±0.2 mm. CNC engraving machines are used for engraving and curve processing of parts.

[0021] Hidden installation, forming niches on the door leaf and door frame, and installing hidden hinges; when the thickness of the board is between 12 cm, the connection uses the furniture 2-in-1 invisible connector; when the thickness of the board needs to be greater than 16 mm, the connection uses the Lamino invisible connector.

[0022] Preferably, the ginkgo wood is selected as follows: ginkgo wood with a tree age of 30-70 years is selected, with straight and clear texture and uniform color, and the wood surface is checked to be free of insect bites, cracks, knots and a series of defects. For wood with 1-3 small knots, the knot position is designed at the edge / back of the furniture, where the knot position does not affect the overall appearance and structure;

[0023] The specific operation of the surface treatment is:

[0024] The finished parts are first polished to remove burrs and rough parts on the surface of the parts. Then the laser scans the board surface along the conveyor belt to form an image, and the ultrasonic vibration grinding head contacts the surface of the ginkgo wood to micro-trim the surface unevenness. After the polishing is completed, the surface of the parts is polished.

[0025] Use transparent / translucent paint to cover up the harsh texture of ginkgo wood, and absorbent materials to absorb the alkyd substances in ginkgo wood that produce odor;

[0026] The coating adopts a multi-cycle process. During the multi-cycle process, the viscosity of the paint and the temperature and humidity of the construction environment are controlled. The viscosity of the paint is controlled at 15-20s (measured by a 4-cup viscometer), the construction environment temperature is 15-25°C, the relative humidity is 40%-60%, and the distance between the spray gun and the wood surface is 20-30cm.

[0027] Preferably, the specific operation of wood modification is:

[0028] Soak the dried wood blank in the modified solution for 2-3 hours to allow the solution to fully penetrate into the wood;

[0029] The modified solution comprises the following components in parts by weight: 60-80 parts of nano silicon dioxide, 15-25 parts of vegetable wax and 5-10 parts of organic silane coupling agent;

[0030] After the soaking is completed, the wood is taken out and treated with a microwave treatment device;

[0031] After the immersion microwave treatment is completed, the wood is subjected to an ultrasonic-assisted impregnation treatment;

[0032] After soaking, the blank is placed in a vacuum impregnation tank, evacuated to -0.08MPa, maintained for 30 minutes, and then the insect repellent preservative solution is injected to restore the normal pressure and maintain 0.2MPa, and then immersed for another 2-3 hours;

[0033] The specific operation of the ultrasonic-assisted impregnation treatment is to put the wood into another impregnation solution containing natural vegetable oil and mildew inhibitor which is different from the modified solution, and then put the impregnation container into an ultrasonic cleaning machine, turn on the ultrasonic cleaning machine, set the frequency to 40-60kHz, and the treatment time is 30-60 minutes;

[0034] The natural vegetable oil is linseed oil, and the mildew preventer is 0.1-0.5 parts of isothiazolinones, 0.2-0.8 parts of quaternary ammonium salts and 1-3 parts of chitosan.

[0035] Preferably, a wool wheel / sponge wheel and polishing wax are used during the polishing process. According to the surface condition of the wood, a pressure sensor detects the contact pressure between the polishing wheel and the wood surface, a roughness sensor measures the roughness value of the wood surface, a displacement sensor monitors the displacement of the polishing wheel and the polishing depth, and an intelligent control system automatically increases the rotation speed and pressure of the polishing machine, and the flatness detection error is controlled within ±0.05 mm.

[0036] Preferably, the coating uses improved water-based wood paint, and before coating, the surface of the furniture parts is cleaned, and a rheological additive is added to the water-based wood paint, and the rheological additive uses a hydroxyethyl cellulose / alkali swelling thickener.

[0037] Preferably, the microwave treatment breaks the pit membrane and weak links on the wood cell wall through microwaves, and the extract in the wood is precipitated / redistributed. The power of the ginkgo wood board with a thickness of 3-5 cm is controlled at 500-600W. After treatment, it is placed in a ventilated place for 2-4 hours, the humidity is controlled at 40%-50%, and the temperature is kept at room temperature.

[0038] Preferably, when processing the components, the quarter-sawn boards are mainly produced according to the anisotropy of the wood, and the radial swelling and shrinkage coefficients are smaller than those in the tangential direction, thereby reducing cracking. During the solid wood panelization process, the amount of glue applied on one side is controlled within 180 to 300 g / m2.

[0039] Preferably, the second stage drying of the combined drying technology adopts any one of artificial drying, convection drying, dehumidification drying and heat pump drying processes;

[0040] The specific operation of the heat pump drying process is that the temperature is slowly increased to 30-35℃ in the preheating stage and maintained for 1-2 hours, the temperature is gradually increased to 45-55℃ in the constant temperature drying stage and maintained for 8-12 hours, the temperature is lowered to 40-45℃ in the deceleration drying stage and maintained for 4-6 hours, and the temperature is controlled at 35-40℃ in the equilibrium stage for 2-3 hours;

[0041] When the humidity reaches the set upper limit (60%-70%), the dehumidification equipment is started;

[0042] The heat pump drying process adopts a closed circulation system, material dust is self-collected, and the drying process is monitored and recorded in real time through a temperature and humidity control system. The drying process parameters are adjusted in time according to actual conditions to ensure that the drying process is carried out according to the predetermined process curve.

[0043] Preferably, the ginkgo wood uses a filler to fill holes and cracks on the surface of the ginkgo wood furniture, then uses a laser cycle to eliminate surface unevenness, and finally uses a surface blocker to add a protective layer to the surface of the ginkgo wood furniture;

[0044] The filler uses a modified adhesive, and the surface sealant uses either shellac or natural wood wax oil;

[0045] The ingredients of the adhesive used after the wood is dried include: lignin, polyvinyl acetate emulsion, styrene terpene, wood flour, polyurethane elastomer prepolymer, and flexibilizer;

[0046] The adhesive used for wet wood splicing comprises the following components: polyether polyol, polymerized diphenylmethane diisocyanate, rosin derivative, organic tin catalyst, sodium ethylenediamine sulfonate and 0.5-3.0% of Sabolt M-990.

[0047] Preferably, the ginkgo wood furniture manufacturing process generates waste materials and a recycling system is set up to crush and reprocess the leftover scraps from wood processing, collect dust and debris generated during the processing, and make wood fiberboard / wood chip particles. The fiberboard is bonded to the interior, backboard and partition of the furniture through a modified adhesive to form structural parts, and the wood chip particles are filled in the defects of the wood.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] 1. The present invention realizes dynamic control of the drying quality of ginkgo wood through the combined drying technology, solves the problem of complicated drying process and easy warping or cracking of wood during drying, shortens the drying cycle, reduces wood deformation and cracking, improves wood physical properties, and improves drying efficiency;

[0050] 2. The present invention realizes the function of easy disassembly and assembly and stable structure through hidden connectors, solves the problem of low utilization rate of the whole ginkgo tree, effectively disperses the stress generated during the use of furniture, shortens the processing time, and increases the space for modeling innovation;

[0051] 3. The present invention achieves the function of filling the defects of the wood itself by modifying the adhesive, solves the problem of poor aesthetics caused by a large number of irregular and scattered random spot-like scars on the wood itself, improves the water resistance and corrosion resistance of furniture, and makes the furniture more beautiful;

[0052] 4. The present invention realizes the function of shortening the processing cycle through a multi-cycle process, solves the problem that the finished product is easily affected by the environment and has a short service life, makes the wood more precise, reduces environmental pollution, and improves safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a schematic diagram of the process flow of the present invention;

[0054] Figure 2 This is a schematic diagram of the ginkgo wood inlay structure of the present invention;

[0055] Figure 3This is a schematic diagram of the ginkgo wood splicing structure of the present invention;

[0056] Figure 4 It is a schematic diagram of the mortise and tenon frame structure of the present invention;

[0057] Figure 5 It is a schematic diagram of the card slot folding structure of the present invention;

[0058] Figure 6 It is a schematic diagram of the telescopic structure of the present invention. DETAILED DESCRIPTION

[0059] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] See also Figure 1 , Figure 2 and Figure 3 , an embodiment provided by the present invention: a high-quality molded ginkgo wood furniture manufacturing and processing technology, including ginkgo wood selection, ginkgo wood treatment, wood modification, parts processing and surface treatment;

[0061] The specific steps of the ginkgo wood treatment are as follows: first, the appearance data of the log is obtained by using the three-dimensional laser scanning technology, defects are marked, and the model is imported into the CNC jigsaw for cutting; before drying, the cut ginkgo wood board is preliminarily treated to remove surface impurities and perform a preliminary balancing treatment to reduce stress concentration in the later drying process; the wood after the preliminary treatment is used for preliminary drying, the thickness of the log and the drying temperature and humidity are adjusted, and the temperature in the drying room is adjusted according to the thickness and initial moisture content of the wood by using the combined drying technology, and the hot air is ensured to flow evenly in the drying room through the circulating air drying system, and the distance between the wood is controlled at 1 / 10-1 / 8 of the width of the wood; the main drying temperature is increased from the initial 30°C to 60°C, the relative humidity is maintained at 40%-60%, the drying time is 1-2 weeks, and the moisture content of the wood is finally reduced to 8%-12%. During the drying process, the moisture content of the wood is tested every three days, the wood is turned by the rotating drum, and the wood is subjected to high temperature and high humidity treatment before the end of the drying process; after the drying is completed, the wood is placed in a humidity environment of 55% for a week of stress release treatment;

[0062] The specific operations of the parts processing are: using 3D modeling to design furniture, simulating the stress conditions of furniture in different environments in real time, using process simulation software to simulate the moisture content changes and stress distribution of wood under the conditions of the combined drying process, optimizing the structural design, completing the parts splitting, and carrying out modular design. The parts processing adopts a flexible production system, and adjusts the production process and process according to the customer's personalized customization needs. Under the customer's requirement to preview the furniture effect, 3D printing models are used for trial and adjustment; laser cutting is used to cut base materials in large quantities, and the CNC machining center controls the error of wood into parts within ±0.2 mm according to the imported furniture design drawings, and uses a CNC engraving machine for engraving and curve processing of parts; hidden installation, forming niches on the door leaf and door frame, and installing hidden hinges; when the thickness of the board is between 12 cm, the connection adopts the furniture 2-in-1 invisible connector; when the thickness of the board needs to be greater than 16 mm, the connection adopts the Lamino invisible connector;

[0063] Furthermore, for the simple and modern bookshelf made of ginkgo wood, ginkgo logs with a diameter of 30-40 cm are selected to ensure that the wood texture is clear and has no obvious defects. The logs are cut into the required boards and square materials. The thickness of the boards is 20 mm (side panels, back panels) and 30 mm (layer panels), and the size of the square materials is 40×40 mm (frame) and 20×40 mm (drawer frame). The wood is boiled in water with the water temperature controlled at 85°C for 5 hours to remove some resin and impurities in the wood and reduce internal stress. Then the drying process is carried out, using a combination of low-temperature pre-drying and high-temperature drying. The low-temperature stage temperature is 35°C, the relative humidity is 65%, and the drying is carried out for 12 days. The high-temperature stage temperature is 65°C, the relative humidity is 45%, and the wood is dried to a moisture content of about 10%.

[0064] The drawers are made using a splicing process. Four 20×40 mm ginkgo wood squares are spliced ​​into a frame, and a 15 mm thick ginkgo wood solid board is installed on the bottom. The surface treatment is first polished, and then painted with environmentally friendly water-based paint. The primer and topcoat are sprayed twice each, with a drying time of 2 hours between each coat. Finally, ultraviolet curing equipment is used to cure the paint surface to improve the hardness and wear resistance of the paint surface.

[0065] See also Figure 1 , Figure 3 and Figure 4 , an embodiment provided by the present invention: a high-quality molded ginkgo wood furniture manufacturing and processing technology, the ginkgo wood selection is: select ginkgo wood with a tree age of 30-70 years, with straight and clear texture and uniform color, check that the wood surface has no insect bites, cracks, knots and a series of defects, and for wood with 1-3 small knots, the knot position is designed at the edge / back of the furniture, where the knot position does not affect the overall appearance and structure;

[0066] The specific operation of the surface treatment is as follows: the finished parts are firstly polished to remove the burrs and rough parts on the surface of the parts; then the laser scanning board is conveyed along the conveyor belt to form an image, and the ultrasonic vibration grinding head contacts the surface of the ginkgo wood to micro-trim the surface unevenness; after the polishing is completed, the surface of the parts is polished; a transparent / translucent coating is used to cover the rigid texture of the ginkgo wood, and the adsorption material adsorbs the alkyd substances in the ginkgo wood that produce odor; the coating adopts a multi-cycle process, and in the multi-cycle process, the viscosity of the paint and the temperature and humidity of the construction environment are controlled, and the viscosity of the paint is controlled within 15-20s (measured by a coating-4 cup viscometer), the construction environment temperature is 15-25°C, the relative humidity is 40%-60%, and the distance between the spray gun and the wood surface is 20-30cm;

[0067] Furthermore, for the ginkgo tea table, select high-quality ginkgo logs with a diameter of 40-50 cm to ensure that the wood texture is beautiful and the texture is uniform. Cut the logs into suitable sizes, the thickness of the desktop board is 40 mm, and the size of the table leg square material is 60×60 mm (before processing); boil the wood in water at 90°C for 6 hours to remove impurities and internal stress in the wood. Then dry it, the low temperature stage temperature is 30°C, the relative humidity is 70%, dry it for 10 days, the high temperature stage temperature is 60°C, the relative humidity is 50%, and dry it to the moisture content of the wood is 8%-10%; use a CNC engraving machine to carve and decorate the edge of the desktop and the bottom of the table legs, and carve out traditional Chinese patterns, such as Ruyi patterns, cloud patterns, etc., reflecting the retro style. The connection between the desktop and the table legs adopts traditional mortise and tenon craftsmanship, such as Zongjiao tenon. The size and precision of the mortise and tenon are strictly controlled during the production process to ensure that the connection is firm and beautiful; the surface treatment is first polished to make the wood surface smooth as a mirror, fully showing the natural texture of the ginkgo wood. Then, after the water-based wood paint is evenly applied, it is placed in a well-ventilated and humid environment to dry naturally. During the drying process, it is polished and painted many times, and 5-7 layers of water-based wood paint are applied in total to make the paint surface deep and bright. Check the flatness of the tabletop, use a level to place it on the tabletop, and observe whether the bubble is in the center. If there is a deviation, fine-tune the tabletop. Check the details and clarity of the carved decorations. If there are any defects, repair and polish them manually. Check the quality of the surface coating, observe whether the raw lacquer coating is uniform and smooth, and whether there are any bubbles, flow marks, etc. If there are any problems, carry out corresponding treatment and repair to ensure that the quality of the tea table meets the high quality requirements.

[0068] See also Figure 1 , Figure 2 and Figure 5 , an embodiment provided by the present invention: a high-quality molding ginkgo wood furniture manufacturing process, the natural plant oil is linseed oil, the mildew inhibitor is 0.1-0.5 parts of isothiazolinone, 0.2-0.8 parts of quaternary ammonium salts and 1-3 parts of chitosan;

[0069] The specific operation of wood modification is: putting the dried wood blank into the modification solution and soaking it for 2-3 hours, so that the solution can fully penetrate into the wood; the modification solution includes the following components by weight: 60-80 parts of nano-silicon dioxide, 15-25 parts of vegetable wax and 5-10 parts of organic silane coupling agent; after the soaking is completed, the wood is taken out and treated with microwave treatment equipment; after the soaking microwave treatment is completed, the wood is subjected to ultrasonic assisted impregnation treatment; after the soaking, the blank is placed in a vacuum impregnation tank, evacuated to -0.08MPa, maintained for 30 minutes, and then an insect repellent preservative solution is injected to restore the normal pressure and maintain 0.2MPa, and then immersed for 2-3 hours; the specific operation of ultrasonic assisted impregnation treatment is to put the wood into another impregnation solution containing natural vegetable oil and mildew inhibitor different from the modification solution, and then put the impregnation container into an ultrasonic cleaning machine, turn on the ultrasonic cleaning machine, set the frequency to 40-60kHz, and the treatment time to 30-60 minutes;

[0070] Further, for the ginkgo dining chair, ginkgo logs with a diameter of 30-40 cm are selected and cut into the required boards and square materials. The multi-layer board is made of multiple layers of ginkgo veneer pressed by environmentally friendly glue. The thickness of the veneer is 3 mm, and the thickness of the multi-layer board of the seat and the backrest is 20 mm and 15 mm respectively. The size of the square material is 30×30 mm (frame) and 30×40 mm (chair legs); the wood is boiled in water, the water temperature is controlled at 80℃, and boiled for 4 hours to remove some resin and impurities in the wood. Then it is dried, the temperature of the low temperature stage is 35℃, the relative humidity is 60%, and it is dried for 13 days. The temperature of the high temperature stage is 70℃, the relative humidity is 40%, and it is dried until the moisture content of the wood reaches about 10%; the square material of the frame part is cut and formed using a CNC machining center to produce precise tenons and mortises. The tapered part of the chair leg is completed by turning to ensure that the leg shape is uniform and beautiful. The multi-layer boards of the seat and backrest are heat-pressed using a mold to make them meet the design requirements of ergonomics;

[0071] Surface treatment: First, sand the wood to make the wood surface smooth and delicate. Then use environmentally friendly water-based paint for painting, choose light colors, spray the primer once, sand it after drying, and then spray two coats of topcoat. The drying time for each coat of topcoat is 1.5 hours.

[0072] See also Figure 1 , Figure 3 and Figure 6, an embodiment provided by the present invention: a high-quality molded ginkgo wood furniture manufacturing and processing technology, the polishing process uses a wool wheel / sponge wheel and polishing wax, the pressure sensor detects the contact pressure between the polishing wheel and the wood surface according to the surface condition of the wood, the roughness sensor measures the roughness value of the wood surface, the displacement sensor monitors the displacement of the polishing wheel and the polishing depth, the intelligent control system automatically increases the speed and pressure of the polishing machine, and the flatness detection error is controlled within ±0.05mm; the coating uses an improved water-based wood paint, and before coating, the surface of the furniture parts is cleaned, and a rheological additive is added to the water-based wood paint, and the rheological additive uses hydroxyethyl cellulose / alkali-soluble Swelling thickener; The microwave treatment breaks the pit membrane and weak links on the cell wall of the wood through microwaves, and the extract in the wood is precipitated / redistributed. The ginkgo wood board with a thickness of 3-5 cm is placed in a ventilated place for 2-4 hours after treatment, and the humidity is controlled at 40%-50%, and the temperature is kept at room temperature; The waste generated by the ginkgo wood furniture production process is set up with a recycling and processing system, the leftover scraps left over from the wood processing are crushed and reprocessed, and the dust and debris generated during the processing are collected to make wood fiberboard / wood chip particles. The fiberboard is combined with the interior, backboard and partition of the furniture through a modified adhesive to form a structural member, and the wood chip particles are filled in the defects of the wood;

[0073] Furthermore, for the ginkgo wood combined wardrobe, ginkgo wood logs with a diameter of 30-40 cm are selected and cut into the required boards and square materials. For the main parts such as the side panels, top panels and bottom panels of the wardrobe, ginkgo wood solid wood boards with a thickness of 20 mm are used; for parts such as frames and partitions, ginkgo wood square materials with a size of 40×40 mm are used. Before processing, the wood is boiled (water temperature 85℃, boiled for 5 hours) and dried (low temperature stage temperature 35℃, relative humidity 65%, dried for 12 days; high temperature stage temperature 65℃, relative humidity 45%, dried until the wood moisture content reaches about 10%); use CNC machining centers and special molds to accurately process the parts of each module. For example, when making the hanging area module, accurate clothes hanging rod installation holes and clothes hook holes are processed; when making the drawer module, the dimensional accuracy of the drawer and the accuracy of the guide rail installation position are ensured. The corners and joints of the wardrobe are rounded to increase safety and comfort. A modular connection system is used, and each module is connected by a specially designed connector. The connector is made of high-strength metal material and has good stability and durability. During installation, you only need to insert the connector into the corresponding module interface, and then tighten the screws or other fixing methods to complete the assembly. It is convenient, fast, firm and reliable.

[0074] Sand it in sequence, use environmentally friendly water-based paint for painting, and choose light colors (such as off-white, light blue, etc.) to create a fresh and comfortable visual effect. Spray the primer once, sand it after it dries, and then spray two coats of topcoat. The drying time for each coat of topcoat is 1.5 hours.

[0075] See also Figure 1 , Figure 4 and Figure 5 , an embodiment provided by the present invention: a high-quality molding ginkgo wood furniture manufacturing and processing technology, the parts processing mainly produces the radial sawn board according to the anisotropy of the wood, the radial wet expansion and shrinkage coefficient is smaller than the tangential direction, reducing cracking, in the process of solid wood plywood, the single-sided glue coating amount is controlled within 180-300g / ㎡; the second stage drying of the combined drying technology adopts any one of artificial drying, convection drying, dehumidification drying and heat pump drying processes;

[0076] The specific operation of the heat pump drying process is that the temperature is slowly increased to 30-35°C in the preheating stage and maintained for 1-2 hours, the temperature is gradually increased to 45-55°C in the constant temperature drying stage and maintained for 8-12 hours, the temperature is reduced to 40-45°C in the deceleration drying stage and maintained for 4-6 hours, and the temperature is controlled at 35-40°C in the equilibrium stage for 2-3 hours; when the humidity reaches the set upper limit (60%-70%), the dehumidification equipment is started; the heat pump drying process adopts a closed circulation system, the material dust is self-collected, the drying process is monitored and recorded in real time through the temperature and humidity control system, and the drying process parameters are adjusted in time according to the actual situation to ensure that the drying process is carried out according to the predetermined process curve; the ginkgo wood uses fillers to fill the holes and cracks on the surface of the ginkgo wood furniture, and then uses laser circulation to eliminate surface bumps, and finally uses a surface blocking agent to add a protective layer to the surface of the ginkgo wood furniture;

[0077] The filler uses a modified adhesive, and the surface sealant uses either shellac or natural wood wax oil;

[0078] The components of the adhesive used after the wood is dried include: lignin, polyvinyl acetate emulsion, styrene terpene, wood powder, polyurethane elastomer prepolymer, and a flexible agent; the adhesive used for wet wood splicing includes the following components: polyether polyol, polymerized diphenylmethane diisocyanate, rosin derivatives, organic tin catalyst, sodium ethylenediamine sulfonate, and 0.5-3.0% of Sabot M-990;

[0079] Furthermore, the cut ginkgo wood boards are preliminarily treated to remove surface impurities and undergo preliminary balancing treatment to reduce stress concentration during the subsequent drying process. The pre-treated wood is then dried, and the temperature in the drying chamber is adjusted according to the thickness and initial moisture content of the wood, so that the wood is gradually dried at a suitable temperature. The circulating air drying system ensures that hot air flows evenly in the drying chamber. After drying, the wood is placed in a constant humidity environment for a period of stress release treatment to reduce residual stress inside the wood. The treated wood is then cut, and during the cutting process, it is necessary to ensure that the wood is subjected to stress that meets basic stability requirements.

[0080] Compared with existing solid wood furniture, this high-quality molding process has brought into play the practical value of ginkgo wood, making it fully utilized. Through wood drying, structural improvement and process optimization, the aesthetics of ginkgo wood furniture has been significantly improved, the structural stability has been enhanced, and the service life has been increased. In addition, by increasing the utilization rate of ginkgo wood and optimizing the processing flow, the production cost has been reduced. Finally, the use of environmentally friendly surface treatment technology has reduced the emission of harmful substances and ensured that the furniture is harmless to human health.

[0081] Working principle: First, use 3D laser scanning technology to obtain the shape data of the log, mark the defects, and import the model into the CNC jigsaw for cutting; before drying, the cut ginkgo wood board is preliminarily treated to remove surface impurities and perform preliminary balancing treatment to reduce stress concentration in the later drying process; use the wood after preliminary treatment for preliminary drying, adjust the thickness of the log and the drying temperature and humidity, use the combined drying technology, adjust the temperature in the drying room according to the thickness and initial moisture content of the wood, and use the circulating air drying system to ensure that the hot air flows evenly in the drying room, and the distance between the wood is controlled at 1 / 10-1 / 8 of the width of the wood; the main drying temperature is increased from the initial 30℃ to 60℃, and the relative humidity is maintained at 40%-60%. The drying time is 1-2 weeks, and the moisture content of the wood is finally reduced to 8%-12%. During the drying process, the moisture content of the wood is tested every three days, and the wood is turned by the drum. Before the end of the drying process, the wood is subjected to high temperature and high humidity treatment; after drying, the wood is placed in a humidity environment of 55% for a week of stress release treatment;

[0082] Use 3D modeling to design furniture, simulate the stress of furniture in different environments in real time, and use process simulation software to simulate the moisture content change and stress distribution of wood under the combined drying process. Optimize the structural design, complete the component splitting, and conduct modular design. Use a flexible production system for component processing. Adjust the production process and process according to the customer's personalized customization needs. Use 3D printed models for trial and adjustment when the customer requires to preview the furniture effect.

[0083] Laser cutting is used to cut base materials in large quantities. The CNC machining center processes wood into parts according to the imported furniture design drawings with an error control of ±0.2 mm. CNC engraving machines are used for engraving and curve processing of parts. Hidden installation forms niches on door panels and door frames and installs hidden hinges. When the thickness of the panels is between 12 cm, the connection adopts furniture 2-in-1 invisible connectors; when the thickness of the panels needs to be greater than 16 mm, the connection adopts Lamino invisible connectors.

[0084] The finished parts are first polished to remove burrs and rough parts on the surface of the parts; then the laser scanning board is transported along the conveyor belt to form an image, and the ultrasonic vibration grinding head contacts the surface of the ginkgo wood to micro-trim the surface unevenness; after polishing, the surface of the parts is polished; transparent / translucent paint is used to cover the rigid texture of the ginkgo wood, and the adsorption material absorbs the alkyd substances in the ginkgo wood that produce odor; the painting adopts a multi-cycle process. During the multi-cycle process, the viscosity of the paint and the temperature and humidity of the construction environment are controlled. The viscosity of the paint is controlled within 15-20s (measured by a coating-4 cup viscometer), the construction environment temperature is 15-25℃, the relative humidity is 40%-60%, and the distance between the spray gun and the wood surface is 20-30cm.

[0085] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A high-quality ginkgo wood furniture manufacturing process, characterized by: Including ginkgo wood selection, ginkgo wood treatment, wood modification, parts processing and surface treatment; The specific steps of ginkgo wood processing are: First, 3D laser scanning technology is used to obtain the shape data of the log, mark the defects, and import the model into the CNC jigsaw for cutting; Before drying, the cut ginkgo wood boards are preliminarily treated to remove surface impurities and undergo preliminary balancing treatment to reduce stress concentration during the subsequent drying process; Use the wood after preliminary treatment for preliminary drying, adjust the thickness of the logs and the drying temperature and humidity, use the combined drying technology, adjust the temperature in the drying room according to the thickness and initial moisture content of the wood, and use the circulating air drying system to ensure that the hot air flows evenly in the drying room. The distance between the wood is controlled at 1 / 10-1 / 8 of the width of the wood; The main drying temperature is raised from the initial 30℃ to 60℃, and the relative humidity is maintained at 40%-60%. The drying time is 1-2 weeks, and the moisture content of the wood is finally reduced to 8%-12%. During the drying process, the moisture content of the wood is tested every three days. The wood is turned by the drum. Before the end of the drying process, the wood is subjected to high temperature and high humidity treatment; after the drying is completed, the wood is placed in a humidity environment of 55% for a week of stress release treatment; The specific operations of parts processing are: Use 3D modeling to design furniture, simulate the stress of furniture in different environments in real time, and use process simulation software to simulate the moisture content change and stress distribution of wood under the combined drying process. Optimize the structural design, complete the component splitting, and conduct modular design. Use a flexible production system for component processing. Adjust the production process and process according to the customer's personalized customization needs. Use 3D printed models for trial and adjustment when the customer requires to preview the furniture effect. Laser cutting is used to cut base materials in large quantities. The CNC machining center processes wood into parts according to the imported furniture design drawings with an error control within ±0.2 mm. CNC engraving machines are used for engraving and curve processing of parts. Hidden installation, forming niches on the door leaf and door frame, and installing hidden hinges; when the thickness of the board is between 12 cm, the connection uses the furniture 2-in-1 invisible connector; when the thickness of the board needs to be greater than 16 mm, the connection uses the Lamino invisible connector.

2. The high-quality ginkgo wood furniture manufacturing process according to claim 1 is characterized by: The ginkgo wood selection is as follows: ginkgo wood with a tree age of 30-70 years is selected, with straight and clear texture and uniform color, and the wood surface is checked for defects such as insect bites, cracks, and knots. For wood with 1-3 small knots, the knots are designed to be located at the edge / back of the furniture, where the knots do not affect the overall appearance and structure; The specific operation of the surface treatment is: The finished parts are first polished to remove burrs and rough parts on the surface of the parts. Then the laser scans the board surface along the conveyor belt to form an image, and the ultrasonic vibration grinding head contacts the surface of the ginkgo wood to micro-trim the surface unevenness. After the polishing is completed, the surface of the parts is polished. Use transparent / translucent paint to cover up the harsh texture of ginkgo wood, and absorbent materials to absorb the alkyd substances in ginkgo wood that produce odor; The coating adopts a multi-cycle process. During the multi-cycle process, the viscosity of the paint and the temperature and humidity of the construction environment are controlled. The viscosity of the paint is controlled at 15-20s (measured by a 4-cup viscometer), the construction environment temperature is 15-25°C, the relative humidity is 40%-60%, and the distance between the spray gun and the wood surface is 20-30cm.

3. The high-quality ginkgo wood furniture manufacturing process according to claim 2 is characterized by: The specific operation of the wood modification is: Soak the dried wood blank in the modified solution for 2-3 hours to allow the solution to fully penetrate into the wood; The modified solution comprises the following components in parts by weight: 60-80 parts of nano silicon dioxide, 15-25 parts of vegetable wax and 5-10 parts of organic silane coupling agent; After the soaking is completed, the wood is taken out and treated with a microwave treatment device; After the immersion microwave treatment is completed, the wood is subjected to an ultrasonic-assisted impregnation treatment; After soaking, the blank is placed in a vacuum impregnation tank, evacuated to -0.08MPa, maintained for 30 minutes, and then the insect repellent preservative solution is injected to restore the normal pressure and maintain 0.2MPa, and then immersed for another 2-3 hours; The specific operation of the ultrasonic-assisted impregnation treatment is to put the wood into another impregnation solution containing natural vegetable oil and mildew inhibitor which is different from the modified solution, and then put the impregnation container into an ultrasonic cleaning machine, turn on the ultrasonic cleaning machine, set the frequency to 40-60kHz, and the treatment time is 30-60 minutes; The natural vegetable oil is linseed oil, and the mildew preventer is 0.1-0.5 parts of isothiazolinones, 0.2-0.8 parts of quaternary ammonium salts and 1-3 parts of chitosan.

4. The high-quality ginkgo wood furniture manufacturing process according to claim 1 is characterized by: The polishing process uses a wool wheel / sponge wheel and polishing wax. According to the surface condition of the wood, a pressure sensor detects the contact pressure between the polishing wheel and the wood surface, a roughness sensor measures the roughness value of the wood surface, a displacement sensor monitors the displacement of the polishing wheel and the polishing depth, and an intelligent control system automatically increases the rotation speed and pressure of the polishing machine, and the flatness detection error is controlled within ±0.05mm.

5. The high-quality ginkgo wood furniture manufacturing process according to claim 2 is characterized by: The coating uses improved water-based wood paint. Before coating, the surfaces of furniture parts are cleaned and treated. A rheological additive is added to the water-based wood paint, and the rheological additive uses a hydroxyethyl cellulose / alkali swelling thickener.

6. The high-quality ginkgo wood furniture manufacturing process according to claim 3 is characterized by: The microwave treatment breaks the pore membrane and weak links on the wood cell wall through microwaves, and the extract in the wood is precipitated / redistributed. The power of the ginkgo wood board with a thickness of 3-5 cm is controlled at 500-600W. After the treatment, it is placed in a ventilated place for 2-4 hours, the humidity is controlled at 40%-50%, and the temperature is kept at room temperature.

7. The high-quality ginkgo wood furniture manufacturing process according to claim 1 is characterized by: When processing the parts, mainly radially cut boards are produced according to the anisotropy of wood. The radial wet expansion and shrinkage coefficients are smaller than those in the tangential direction, thereby reducing cracking. In the process of solid wood boarding, the amount of glue applied on one side is controlled within 180 to 300 g / m2.

8. The high-quality ginkgo wood furniture manufacturing process according to claim 1 is characterized by: The second stage drying of the combined drying technology adopts any one of artificial drying, convection drying, dehumidification drying and heat pump drying processes; The specific operation of the heat pump drying process is that the temperature is slowly increased to 30-35℃ in the preheating stage and maintained for 1-2 hours, the temperature is gradually increased to 45-55℃ in the constant temperature drying stage and maintained for 8-12 hours, the temperature is lowered to 40-45℃ in the deceleration drying stage and maintained for 4-6 hours, and the temperature is controlled at 35-40℃ in the equilibrium stage for 2-3 hours; When the humidity reaches the set upper limit (60%-70%), the dehumidification equipment is started; The heat pump drying process adopts a closed circulation system, material dust is self-collected, and the drying process is monitored and recorded in real time through a temperature and humidity control system. The drying process parameters are adjusted in time according to actual conditions to ensure that the drying process is carried out according to the predetermined process curve.

9. The high-quality ginkgo wood furniture manufacturing process according to claim 1 is characterized by: The ginkgo wood uses a filler to fill holes and cracks on the surface of the ginkgo wood furniture, then uses a laser cycle to eliminate surface bumps, and finally uses a surface blocker to add a protective layer to the surface of the ginkgo wood furniture; The filler uses a modified adhesive, and the surface sealant uses either shellac or natural wood wax oil; The ingredients of the adhesive used after the wood is dried include: lignin, polyvinyl acetate emulsion, styrene terpene, wood flour, polyurethane elastomer prepolymer, and flexibilizer; The adhesive used for wet wood splicing comprises the following components: polyether polyol, polymerized diphenylmethane diisocyanate, rosin derivative, organic tin catalyst, sodium ethylenediamine sulfonate and 0.5-3.0% of Sabolt M-990.

10. The high-quality ginkgo wood furniture manufacturing process according to claim 1 is characterized by: The ginkgo wood furniture manufacturing process generates waste materials and sets up a recycling and processing system to crush and reprocess the leftover scraps from wood processing, collect dust and debris generated during the processing to make wood fiberboard / wood chip particles, and the fiberboard is bonded to the interior, backboard and partition of the furniture through a modified adhesive to form structural parts, and the wood chip particles are filled in the defects of the wood.

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