A plastic corrugated wood board and its manufacturing equipment and method

Abstract

The present invention discloses a plastic corrugated wood board and a manufacturing device and method thereof. The plastic corrugated wood board is a three-dimensional molded wood corrugated core board arranged between two layers of wood veneers arranged at a distance from each other. The three-dimensional molded wood corrugated core board is a molded material made by a molding device along a vertical or parallel direction of wood fibers after air drying and water soaking of delignified wood veneers. The preparation equipment includes a corrugated structure pressing mold and a corrugated structure gluing machine. The method steps are to perform delignification treatment, air drying shrinkage, water soaking treatment, molding, assembly and bonding on the wood veneers. The present invention can be widely used in the fields of construction, transportation, packaging, transportation and circulation, and has the advantages of saving wood consumption, high impact resistance, good formability, excellent compressive strength, mechanized production and environmental sustainability.

Description

Technical Field

[0001] The invention relates to a plastic corrugated wood board and a manufacturing device and method thereof. Background Art

[0002] In the past, most of the packaging materials for electromechanical products (large electrical appliances, small machine tools) were made of wood. Using wood as packaging material will not only waste a lot of forest resources, but also have shortcomings such as irregular packaging, excessive use of materials, poor load-bearing and pressure resistance, and inability to be recycled. The export of wooden packaging also faces difficulties such as green trade barriers. If heavy-duty corrugated cardboard boxes are used instead of wood as packaging materials for electromechanical products, there are also performance disadvantages such as poor load-bearing capacity, poor water and moisture resistance, weak pressure resistance when stacked, and inability to be recycled. Carbon-intensive fossil fuel materials such as metals and plastics as packaging structural materials will aggravate climate change and deteriorate the environment.

[0003] Therefore, it is particularly urgent to develop and design a new type of high-strength all-wood packaging material to replace heavy corrugated boxes, wooden packaging boxes and metal plastic packaging as a new material for packaging electromechanical products. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a plastic corrugated wood board and its manufacturing equipment and method, which can be widely used in the fields of construction, transportation, packaging, transportation and circulation, and has the advantages of saving wood usage, high impact resistance, good formability, excellent compressive strength and water and moisture resistance, mechanized production and environmental sustainability.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a plastic corrugated wood board and a manufacturing device and method thereof, comprising the following steps:

[0006] (1) Delignification of wood veneer: 2.5M NaOH (sodium hydroxide) and 0.4M Na 2 SO 3 The wood veneer is delignified by a boiling aqueous solution of sodium carbonate for 16 to 48 hours, and then soaked in water several times to remove chemicals, thereby partially removing lignin and hemicellulose from the wood veneer to obtain partially delignified wood;

[0007] Or use 2% KOH (potassium hydroxide) and 1% NaClO 2 (sodium chlorite) aqueous solution for simple delignification treatment for 16 to 48 hours, and then soaking in water several times to remove chemical substances, thereby partially removing lignin and hemicellulose from the wood veneer to obtain partially delignified wood; the wood veneer is a veneer of coniferous wood and broad-leaved wood, and the thickness of the wood veneer is 0.2mm, 1mm, 1.5mm, 2mm, 3mm, 4mm respectively;

[0008] (2) Air-drying shrinkage: Air-dry partially delignified wood for 15 to 30 h at room temperature and relative humidity to reduce the moisture content of the wood to below 13%, and the shrinkage of the wood is obtained;

[0009] (3) Water immersion treatment: Soak the shrunken wood in water for 3 to 10 minutes to obtain plastic wood;

[0010] (4) Compression molding: using two different compression temperatures and a corrugated structure pressing mold, the plastic wood of different thicknesses is molded into molding materials according to the required corrugated structure along the direction perpendicular to or parallel to the wood fiber, and then dried to remove moisture from the molding materials. Combining the compression molding process, a three-dimensional molded wood corrugated core board with a wavy corrugated structure is prepared;

[0011] (5) Assembly and bonding of plastic corrugated wood boards: Use a corrugated structure glue coating machine to apply adhesive to the outer end surfaces of the crests and troughs of the three-dimensional molded wood corrugated core board, place wood veneers outside the adhesive at room temperature, let stand for 10 to 20 minutes, and press at 0.5 to 0.8 MPa for 10 to 20 hours to make the three-dimensional molded wood corrugated core board adhere between the two layers of wood veneers to prepare a plastic corrugated wood board. The plastic corrugated wood board is a three-dimensional molded wood corrugated core board arranged between two layers of wood veneers spaced apart from each other, and the three-dimensional molded wood corrugated core board is a molding material made of delignified wood veneers that are air-dried, soaked in water, and molded by a molding equipment along the direction perpendicular to or parallel to the wood fibers.

[0012] The ratio of the thickness of the wood veneer to the thickness of the three-dimensional molded wood corrugated core board is 1:0.2-1.

[0013] As a preferred technical solution of the present invention, the wave height of the three-dimensional molded wood corrugated core board is 0.5 cm to 20 cm, the wave distance is 1 cm to 30 cm, and the waveform is arc-shaped, or concave-convex, or triangular.

[0014] As a preferred technical solution of the present invention, the two molding temperatures are high temperature pressing at 100-200°C and air drying, or oven drying pressing at 80-90°C.

[0015] As a preferred technical solution of the present invention, the assembly of the plastic corrugated wood board is such that the angle between the wood fiber direction of the adjacent layers of wood veneer and the wood fiber direction of the three-dimensional molded wood corrugated core board is 80 to 110 degrees. 0 .

[0016] As a preferred technical solution of the present invention, the adhesive is white latex, resin glue, the required bonding temperature is 20-80°C, and the processing time is 10-60min; or a water-soluble phenolic resin is used as an adhesive, the solid content is 64%, and the curing temperature is 120-150°C; or a single-component polyurethane (PUR): model DH 106, light brown, the use temperature is 5°C-35°C, the shear strength is greater than 10 MPa, at 25°C, its viscosity is 8000-20000 mpa.s, the open time is 20-30 min, the pressurization time is 10-90 min, and the glue application amount is 350-400 g / m 2 .

[0017] As a preferred technical solution of the present invention, the corrugated structure pressing mold is a four-column lower end fixed on the four corners of the base, a movable crossbeam is slidably mounted on the four columns at the upper end of the base, the upper ends of the four columns are fixed on the upper crossbeam, a vertical hydraulic cylinder is provided in the middle of the upper crossbeam, the telescopic rod of the hydraulic cylinder passes through the upper crossbeam and is connected to the middle of the upper end surface of the movable crossbeam, an upper anvil is fixed to the lower end surface of the movable crossbeam through an insulation layer, a lower anvil is fixed to the base at the lower end of the movable crossbeam through an insulation layer, the corresponding surfaces of the upper and lower anvils are wavy concave and convex staggered surfaces, the upper and lower anvils are the upper and lower anvils of a heat-generating belt air-drying device, and pressure sensors are provided on the corresponding sides of the upper and lower anvils.

[0018] As a preferred technical solution of the present invention, the lower chopping board of the heat-generating air-drying device is hollow inside the lower chopping board to form a hot air chamber, and the lower end surface of the lower chopping board is fixed to the base at the lower end of the movable crossbeam plate through a heat-insulating layer plate. The base is a hollow base, and an air duct is provided in the middle of the upper end of the base. The upper end of the air duct passes through the heat-insulating layer plate and communicates with the hot air chamber through a pipe heater located in the hot air chamber. A fan is provided in the air duct, and a plurality of through air holes are provided between the hot air chamber and the upper end surface of the lower chopping board. A plurality of electric heating tubes are provided at intervals in the upper end surface wall of the lower chopping board, and a temperature control sensor is provided on the lower chopping board. The aperture of the air hole is 1 to 2 mm, and the adjacent distance between the exposed air holes on the upper and lower chopping boards is 2 to 3 cm.

[0019] As a preferred technical solution of the present invention, the corrugated structure glue coating machine is located at the rear end of the corrugated structure pressing mold, and is used to run the three-dimensional molded wood corrugated core board and automatically apply adhesive to the outer end surfaces of the crests and troughs of the running three-dimensional molded wood corrugated core board, including a moving three-dimensional molded wood corrugated core board mechanism and a glue coating mechanism for the three-dimensional molded wood corrugated core board;

[0020] The movable three-dimensional molded wood corrugated core board mechanism is as follows: a main movable shaft is provided at one side end of the upper part of the machine body through the transverse axis of the bearing seat, an input transmission sprocket is provided on the main movable shaft located outside one side of the machine body, and a movable motor is provided on the lower side of the input transmission sprocket, and the movable motor drives the input transmission sprocket through the motor transmission sprocket and the chain to rotate the main movable shaft, and an output transmission sprocket is provided on the main movable shaft outside the other side of the machine body, and a plurality of slave movable shafts parallel to the main movable shaft are provided at an interval from the upper part of the machine body at the same level as the main movable shaft, and driven transmission sprockets are respectively provided on each slave movable shaft on the same side as the output transmission sprocket, and the output transmission sprocket drives each driven transmission sprocket to rotate synchronously through the chain, and a plurality of main and slave movable wheels are longitudinally correspondingly provided at an interval on the main and slave movable shafts inside the machine body, and each main and slave movable wheel is supported on the inner side surface of each wave crest of the three-dimensional molded wood corrugated core board.

[0021] As a preferred technical solution of the present invention, the gluing mechanism of the three-dimensional molded wood corrugated core board is that a bottom mounting plate is provided on the middle part of the machine body, the lower ends of the two support plates are respectively located on both sides of the upper end of the bottom mounting plate, the upper ends of the two support plates are provided with a horizontal mounting plate, and a telescopic shaft seat mounting plate is provided on the horizontal mounting plate. The telescopic shaft seat mounting plate is provided with two movable crossbeam grooves that penetrate front and rear and are distributed at intervals up and down, and a plurality of telescopic shaft seats are vertically spaced apart on the telescopic shaft seat mounting plate at the rear end of the movable crossbeam groove, and two screw holes distributed up and down are provided on the same telescopic shaft seat, and two fixing bolts pass through the two movable crossbeam grooves and are screwed to the two screw holes respectively, a through slot hole for the telescopic shaft to pass through is provided in the middle of the horizontal mounting plate, and the middle parts of the plurality of telescopic shafts are respectively arranged in each telescopic shaft seat, and the telescopic shaft The upper end shaft is provided with a telescopic shaft adjusting hand wheel which can drive the telescopic shaft to move up and down; the lower end shaft of the telescopic shaft passing through the through slot is connected to the rear end of the tongue depressor; a compression spring is provided between the upper end of the tongue depressor and the lower end of the telescopic shaft; a longitudinal glue outlet rod is provided at the front end of the tongue depressor; a glue box is provided on the horizontal mounting plate at the upper end of the glue outlet rod; a plurality of glue outlet ports are provided at the lower end of the glue box at intervals; the upper end inlet of each glue outlet rod is connected to the glue outlet port of the glue box through a plurality of telescopic guide tubes; the glue outlet holes at the lower end of each glue outlet rod are supported at the peaks of the three-dimensional molded wood corrugated core board (1); a glue pressing plate is provided in the glue box; the periphery of the glue pressing plate is sealed and slidably matched with the inner wall of the glue box through a sealing ring; a counterweight is provided at the upper end of the glue pressing plate; and a glue injection tube is provided at the bottom of the glue box;

[0022] The corresponding two side machine body walls of the lower end of the rubber outlet are provided with longitudinal grooves, and two bearing seats are adjustably fixed on the outer side walls of the machine body on both sides of the longitudinal grooves by bolts, one side end of the lower rubber shaft passes through the longitudinal groove and is axially connected with the bearing seat on the outer side wall of the machine body, and the other side end of the lower rubber shaft passes through the longitudinal groove on the other side and is axially connected with the bearing seat on the outer side wall of the machine body, and then is connected with the motor shaft of the rubber shaft motor, and the rubber shaft motor is fixed on an adjustable fixing plate, and a plurality of lower rubber wheels are arranged at intervals on the lower rubber shaft between the two side machine body walls, and a lower rubber box is arranged on the machine body at the lower end of the lower rubber shaft, and liquid level sensors are respectively arranged on the upper and lower rubber boxes, and two rubber injection hoses respectively communicating with the lower ends of the upper and lower rubber boxes are communicated with the rubber pump through a conduit, and the lower part of the lower rubber wheel is located in the adhesive in the lower rubber box, and the adhesive on the upper roller surface of the lower rubber wheel contacts the outer end faces of each trough of the three-dimensional molded wood corrugated core board, and the upper and lower rubber boxes are provided with an electric control heating tube and a temperature control sensor.

[0023] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0024] 1. The plastic corrugated wood board prepared by the method of the present invention can be widely used in the fields of electromechanical product packaging, non-load-bearing construction, decoration, transportation, etc., can improve the comprehensive mechanical properties of the new material, save a large amount of wood, have excellent water resistance and moisture resistance, extend the service life of the packaging material, reasonably and efficiently solve the problems existing in the packaging of electromechanical products, can reduce the impact and vibration of the contents, effectively protect the products from damage during transportation, stacking, etc., and realize the economical utilization of packaging materials and the reduction of consumption of packaging resources; calculations show that the plastic corrugated wood board prepared by the method of the present invention can save 70-85% of the same volume of wood, can support a weight of more than 5000 times its own weight without obvious deformation, has ultra-high rigidity and high impact resistance, and excellent water resistance and moisture resistance; can be used as a lightweight structural material and widely used in the fields of construction, transportation, packaging, transportation and circulation.

[0025] 2. The manufacturing equipment of the present invention has a simple structure, is easy to operate and reliable, and the automated pressing and gluing provide guarantees for the automated production of plastic corrugated wood boards.

[0026] 3. The preparation method of the present invention is simple and practical, has feasible procedures, low production cost, and is environmentally friendly.

[0027] 4. When the plastic corrugated wood board prepared by the present invention is damaged by overload impact, it can be treated with water impact again to disassemble the board, and the three-dimensional molded wood board can be turned back into flexible plastic wood, and then re-molded and processed to prepare the plastic corrugated wood board again.

[0028] 5. The plastic corrugated wood board structural material prepared by the preparation method provided by the present invention can expand the multifunctional application of sustainable and high-performance materials, significantly reduce the amount of wood used and improve the utilization rate of wood, making wood a potential substitute for plastics and metals in structural applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of the plastic corrugated wood board of the present invention;

[0030] Figure 2 A schematic structural diagram of another three-dimensional molded wood corrugated core board of the present invention;

[0031] Figure 3 It is a structural schematic diagram of the corrugated structure pressing mold of the present invention;

[0032] Figure 4 It is a structural schematic diagram of the lower anvil plate in the corrugated structure pressing mold of the present invention;

[0033] Figure 5 It is a structural schematic diagram of the corrugated structure gluing machine of the present invention;

[0034] Figure 6 for Figure 5 AA section structure schematic diagram in;

[0035] Figure 7 for Figure 5 Schematic diagram of the BB cross-section structure.

[0036] Among them: 1. Three-dimensional molded wood corrugated core board; 2. Wood veneer; 3. Base; 4. Lower chopping board; 5. Corresponding surface of upper chopping board; 6. Upper crossbeam; 7. Telescopic rod of hydraulic cylinder; 8. Hydraulic cylinder; 9. Upper chopping board; 10. Movable crossbeam; 11. Column; 12. Temperature control sensor; 13. Air hole; 14. Electric heating pipe; 15. Insulation layer board; 16. Screw; 17. Hot air chamber; 18. Fan; 19. Pipe heater; 20. Pressure sensor; 21. Main moving wheel; 22. Glue outlet rod; 23. Glue box; 24. Moving crossbeam slot; 25. Telescopic shaft seat; 26. Telescopic shaft adjustment hand wheel; 27. Telescopic shaft; 28. Telescopic shaft seat installation Plate; 29, bottom mounting plate; 30, electric control heating tube; 31, support plate; 32, lower rubber wheel; 33, main moving shaft; 34, output drive sprocket; 35, glue injection tube; 36, lower rubber box; 37, input drive sprocket; 38, bearing seat; 39, cross-mounted plate; 40, chain; 41, motor drive sprocket; 42, counterweight; 43, slave moving wheel; 44, mobile motor; 45, driven drive sprocket; 46, fixing bolt; 47, rubber pressing plate; 48, compression spring; 49, telescopic guide tube; 50, tongue pressing rod; 51, liquid level sensor; 52, lower rubber shaft; 53, rubber shaft motor; 54, machine body; 55, slave moving shaft; 56, fixed plate. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, purpose and efficacy of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0038] Embodiment 1: as Figures 3-4 As shown, the corrugated structure pressing mold used in the method of the present invention is a mold having four columns 11 whose lower ends are fixed on the four corners of the base 3, and a movable crossbeam 10 in the shape of a rectangular body is slidably mounted on the four columns at the upper end of the base. The upper ends of the four columns are fixed on the upper crossbeam 6 in the shape of a rectangular body, and a vertical hydraulic cylinder 8 is provided in the middle of the upper crossbeam 6. The number of hydraulic cylinders can be 1 to 4 as required, and the telescopic rod 7 of the hydraulic cylinder passes through the upper crossbeam 6 and is connected to the middle of the upper end surface of the movable crossbeam 10. The lower end surface of the movable crossbeam 10 is fixed with an upper anvil 9 through an insulating layer 15. The insulating layer is a pressure-resistant insulating plate and the upper anvil is fixed to the lower end surface of the movable crossbeam by a plurality of screws 16 around it. The lower anvil is the same, so it will not be described again.

[0039] A lower chopping board 4 is fixed on the base 3 at the lower end of the movable crossbeam plate through a heat-insulating layer plate. The corresponding surfaces 5 of the upper and lower chopping boards are wave-shaped concave-convex staggered surfaces. The upper and lower chopping boards are the upper and lower chopping boards of the heat-generating air-drying device.

[0040] The lower chopping board of the heat-generating air-drying device is a hollow hot air chamber 17 formed in the lower chopping board 4. The lower end surface of the lower chopping board is fixed to the upper end surface of the base 3 through the heat-insulating layer 15. The base 3 is a hollow base. An air duct is arranged in the middle of the upper end of the base. The upper end of the air duct passes through the heat-insulating layer and communicates with the hot air chamber through the pipe heater 19 located in the hot air chamber. A fan 18 is arranged in the air duct. A plurality of through air holes 13 are arranged between the hot air chamber and the upper end surface of the lower chopping board. The aperture of the air hole is 1-2 mm. The adjacent distance of the exposed air holes located on the upper and lower chopping boards is 2-3 cm. A plurality of electric heating pipes 14 are arranged at intervals in the upper end surface wall of the lower chopping board. Each electric heating pipe is preferably located in the wave crest. A temperature control sensor 12 is arranged on the lower chopping board, and a pressure sensor 20 is arranged on the upper and lower chopping boards. The opening and closing of the pressure sensor, the temperature control sensor, the electric heating pipe and the pipe heater, the heating temperature, the start-up and the pressure of the hydraulic cylinder are all controlled by the PLC controller in the electric control box.

[0041] The structure of the upper chopping board is the same as that of the lower chopping board, so it will not be repeated.

[0042] During operation, the plastic wood is placed between the upper and lower cutting boards, and the PLC controller controls the start of the electric heating tube and the pipe heater to electrically heat and heat the upper and lower cutting boards and the hot air chamber at the same time. The temperature control sensor controlled by the PLC controller reads the data of the upper and lower cutting boards and the hot air chamber to control the temperature of the upper and lower cutting boards and the hot air chamber to reach the set value, and the fan is started to blow the drying hot air in the hot air chamber through the air holes to the corrugated concave and convex staggered surfaces of the corresponding surfaces of the upper and lower cutting boards to dry the plastic wood; at the same time, the hydraulic cylinder controlled by the PLC controller is started to make the telescopic rod of the hydraulic cylinder push the movable crossbeam plate 10 The upper chopping board 9 is driven to move toward the lower chopping board 4 along the four uprights 11, and pressure is applied to the plastic wood between the upper and lower chopping boards to form a three-dimensional molded wood corrugated core board 1 with a wavy corrugated structure, which is dried by hot air at the same time; the pressure applied to the plastic wood between the upper and lower chopping boards is controlled by a PLC controller to read the pressure sensor data and control the movement of the telescopic rod of the hydraulic cylinder. When the applied pressure, air-drying time, etc. reach the set values, the hydraulic cylinder controlled by the PLC controller moves the telescopic rod of the hydraulic cylinder in the opposite direction, takes out the formed three-dimensional molded wood corrugated core board, and repeats the processing of the next plastic wood.

[0043] like Figures 5 to 7 As shown, the structure of the corrugated structure glue coating machine of the present invention is: the corrugated structure glue coating machine is located at the rear end of the corrugated structure pressing mold, and is used to run the three-dimensional molded wood corrugated core board 1 and automatically apply adhesive to the outer end surfaces of the crests and troughs of the running three-dimensional molded wood corrugated core board, including a moving three-dimensional molded wood corrugated core board mechanism and a glue coating mechanism for the three-dimensional molded wood corrugated core board;

[0044] like Figure 5 and Figure 7 As shown, the mobile three-dimensional molded wood corrugated core board mechanism is: a main moving shaft 33 is provided at one end of the upper part of the body 54 through a bearing seat 38 transversely, an input drive sprocket 37 is provided on the main moving shaft 33 outside one side of the body, and a moving motor 44 is provided at the lower side of the input drive sprocket 37. The moving motor 44 drives the input drive sprocket 37 through the motor drive sprocket 41 and the chain to rotate the main moving shaft 33. An output drive sprocket 34 is provided on the main moving shaft 33 outside the other side of the body, and is spaced apart from the upper part of the body at a horizontal position of the main moving shaft 33. A plurality of slave moving shafts 55 parallel to the main moving shaft 33 are provided through the shafts of the bearing seats, and a driven driving sprocket 45 is provided on each slave moving shaft 55 on the same side as the output driving sprocket. The output driving sprocket drives each driven driving sprocket 45 to rotate synchronously through the chain 40. A plurality of slave moving wheels 43 are provided longitudinally corresponding to each other at intervals on the slave moving shaft 55 inside the body, and a plurality of main moving wheels 21 are provided longitudinally corresponding to each slave moving wheel at intervals on the main moving shaft 33 inside the body, and each master and slave moving wheel in the same row is longitudinally in the same straight line. Each master and slave moving wheel is supported on the inner side surface of each wave crest of the three-dimensional molded wood corrugated core board.

[0045] like Figure 5 and Figure 6 As shown, the gluing mechanism of the three-dimensional molded wood corrugated core board is that a bottom mounting plate 29 is provided on the middle part of the body 54, and the lower ends of the two support plates 31 are respectively located on both sides of the upper end of the bottom mounting plate 29, and the upper ends of the two support plates 31 are provided with a horizontal mounting plate 39, and a telescopic shaft seat mounting plate 28 is provided on the horizontal mounting plate, and the telescopic shaft seat mounting plate 28 is provided with two movable cross beam grooves 24 that penetrate the front and rear and are distributed at intervals up and down, and a plurality of telescopic shaft seats 25 are vertically spaced apart on the telescopic shaft seat mounting plate 28 at the rear end of the movable cross beam groove, and two screw holes distributed up and down are provided on the same telescopic shaft seat, and two fixing bolts 46 pass through the two movable cross beam grooves and are screwed to the two screw holes respectively, and the position of the telescopic shaft seat can be adjusted by loosening the two fixing bolts 46 to ensure that the telescopic axis is aligned with each crest of the three-dimensional molded wood corrugated core board 1, and then the two fixing bolts 46 are tightened to fix the telescopic shaft seat. A through slot hole is provided in the middle of the horizontal mounting plate for the telescopic shaft 27 to pass through. The middle parts of several telescopic shafts 27 are respectively arranged in the telescopic shaft seats 25. The upper end of the telescopic shaft is provided with a telescopic shaft adjustment hand wheel 26 that can drive the telescopic shaft to move up and down. The telescopic shaft can be adjusted by turning the telescopic shaft adjustment hand wheel. The lower end of the telescopic shaft 27 passing through the through slot hole is connected to the rear end of the tongue depressor rod 50. A compression spring 48 is provided between the upper end of the tongue depressor rod 50 and the lower end of the telescopic shaft so that the lower end of the rubber hose rod at the front end of the tongue depressor rod is supported against the wave crest of the three-dimensional molded wood corrugated core board 1. A longitudinal glue outlet rod 22 is provided at the front end of the tongue depressor rod 50, and a glue box 23 is provided on the transverse mounting plate 39 at the upper end of the glue outlet rod 22. A plurality of glue outlet ports are provided at the lower end of the glue box at intervals. The upper end inlet of each glue outlet rod is communicated with the glue outlet of the glue box through a plurality of telescopic guide tubes 49. The glue outlet holes at the lower ends of each glue outlet rod 22 are supported on the peaks of the three-dimensional molded wood corrugated core board 1. A glue pressing plate 47 is provided in the glue box 23. The periphery of the glue pressing plate 47 is sealed and slidably matched with the inner wall of the glue box 23 through a sealing ring. A counterweight block 42 is provided at the upper end of the glue pressing plate 47. The counterweight block is used to adjust the pressure applied by the glue pressing plate 47 to the adhesive in the glue box to control the glue output of the glue outlet hole at the lower end of the glue outlet rod 22. When the applied pressure is large, the glue output of the glue outlet hole is large, and vice versa. A glue injection tube 35 is provided at the bottom of the glue box for injecting adhesive into the glue box.

[0046] The corresponding two side walls of the machine body at the lower end of the outlet of the rubber pipe are provided with longitudinal grooves, and two bearing seats 38 are adjustably fixed on the outer side walls of the machine body on both sides of the longitudinal grooves by bolts. One side end of the lower rubber shaft 52 passes through the longitudinal groove and is axially connected with the bearing seat on the outer side wall of the machine body, and the other side end of the lower rubber shaft 52 passes through the longitudinal groove on the other side and is axially connected with the bearing seat on the outer side wall of the machine body, and then is connected to the motor shaft of the rubber shaft motor 53. The rubber shaft motor 53 is fixed on the adjustable fixing plate 56. A plurality of lower rubber wheels 32 are provided at intervals on the lower rubber shaft 52 between the two side walls of the machine body. A lower rubber box 36 is provided on the machine body at the lower end of the lower rubber shaft, and liquid level sensors 51 are provided on the upper and lower rubber boxes respectively. Two injection hoses 35 connected to the lower ends of the upper and lower glue boxes are connected to the glue pump through the conduit. The lower part of the lower glue wheel 32 is located in the adhesive in the lower glue box 36, and the adhesive on the upper wheel surface of the lower glue wheel 32 contacts the outer end faces of each trough of the three-dimensional molded wood corrugated core board. The upper and lower glue boxes are provided with an electric heating tube 30 and a temperature control sensor to ensure that the adhesive in the upper and lower glue boxes is in a suitable liquid state. Obviously, by replacing the lower glue wheel 32 with different radius sizes on the lower glue shaft, it is suitable for gluing the outer end faces of the troughs of the three-dimensional molded wood corrugated core board with different heights of wave heights; the contact distance between the lower glue wheel and the outer end face of the trough can also be adjusted by moving the upper and lower positions of the longitudinally slotted outer bearing seat to control the amount of glue; by adding and subtracting the number of upper and lower glue wheels 32 on the lower glue shaft, the gluing of the three-dimensional molded wood corrugated core board corresponding to different wave pitches or wave peak numbers can be completed.

[0047] The moving motor and the glue shaft motor can be servo motors whose speeds are controlled by a PLC controller. For example, a glue quantity photoelectric sensor connected to the PLC controller can be provided on the machine body at the rear end of the glue outlet pipe rod 22. The glue quantity photoelectric sensor controlled by the PLC controller reads the glue thickness data at the crest of the three-dimensional molded wood corrugated core board after gluing. The glue quantity can be controlled by controlling the speed of the moving motor. The glue quantity can be reduced by increasing the speed of the moving motor, and vice versa. Similarly, the glue quantity on the outer end surfaces of each trough of the three-dimensional molded wood corrugated core board can be controlled by controlling the speed of the glue shaft motor. This is a traditional technology and will not be described in detail.

[0048] During operation, the temperature control sensor and liquid level sensor controlled by the PLC controller read the temperature and liquid level data in the upper and lower glue boxes respectively. When the liquid level data is lower than the set value, the PLC controller controls to start the glue pumps connected to the adhesive storage barrel to inject the adhesive into the upper and lower glue boxes through two injection hoses 35 respectively. When the liquid level data reaches the set value, the PLC controller turns off the glue pump. The PLC controller also controls the opening and closing of the electric heating tube 30 in the upper and lower glue boxes through the temperature control sensor to ensure that the adhesive in the upper and lower glue boxes is at a suitable liquid temperature. The three-dimensional molded wood corrugated core board 1 is placed on the main and slave moving wheels at the front end of the machine body. The main and slave moving wheels are held on the inner side surfaces of the wave crests of the three-dimensional molded wood corrugated core board. The moving motor is started. The moving motor drives the input drive sprocket 37 through the motor drive sprocket 41 and the chain to make the main moving shaft 33 rotate counterclockwise. The output drive sprocket 34 on the main moving shaft 33 outside the other side of the machine body drives the driven drive sprockets through the chain 40 to make the slave moving shafts 55 rotate synchronously in the same direction, driving the main and slave moving wheels on the main and slave moving shafts to rotate synchronously counterclockwise. The wheel is held on the inner end surface of each wave crest of the three-dimensional molded wood corrugated core board and moved to the gluing mechanism of the three-dimensional molded wood corrugated core board. At this time, the glue outlet holes at the lower ends of the glue outlet tube rods 22 are held at the wave crests of the three-dimensional molded wood corrugated core board 1, and the telescopic guide tubes 49 connected to the glue box guide the adhesive into the glue outlet tube rods 22 to flow out from the glue outlet holes, and glue is applied to the wave crests of the running three-dimensional molded wood corrugated core board 1; the telescopic shaft can be adjusted by rotating the telescopic shaft adjustment hand wheel to move up and down to ensure that the glue outlet holes at the lower ends of the glue outlet tube rods 22 are held at the wave crests of the three-dimensional molded wood corrugated core board 1.

[0049] The glue shaft motor controlled by the PLC controller rotates through the lower glue shaft to drive the lower glue wheels 32 to rotate, pick up the adhesive in the lower glue box, and the adhesive on the upper roller surface of the lower glue wheel 32 contacts the outer end surfaces of the troughs of the three-dimensional molded wood corrugated core board, and glue is applied to the outer end surfaces of the troughs of the three-dimensional molded wood corrugated core board.

[0050] After gluing the outer end surfaces of the wave crests and troughs of the running three-dimensional molded wood corrugated core board, the master and slave moving wheels hold the inner end surfaces of the wave crests of the three-dimensional molded wood corrugated core board and move the glued three-dimensional molded wood corrugated core board to the outside of the gluing mechanism. Then, the three-dimensional molded wood corrugated core board after gluing is placed on the assembly table by a robot (or manually) so that the three-dimensional molded wood corrugated core board 1 is glued between two layers of wood veneers 2, and a plastic corrugated wood board is prepared.

[0051] A plastic corrugated board and a manufacturing device and method thereof, comprising the following steps: using 2.5M NaOH (sodium hydroxide) and 0.4M Na2SO 3A 1.5 mm thick wood veneer 2 made of black poplar is delignified with a boiling aqueous solution of (sodium carbonate) for 24 hours, the wood veneer is taken out and then immersed in water for 3 times to remove chemicals, thereby partially removing lignin and hemicellulose in the wood veneer; the partially delignified wood is air-dried for 24 hours at room temperature and relative humidity to reduce the moisture content of the wood to below 13%, thereby obtaining shrunken wood; the shrunken wood is immersed in water for 3 minutes to obtain plastic wood, so that the shrunken wood partially re-expands the cell wall, and the moldable wood formed will produce a unique partially open wrinkled cell wall structure; the corrugated structure pressing mold of the present invention is used, the molding temperature is 180°C, the drying hot air temperature is 180°C, and the drying temperature is 180°C. ℃, molding and drying time is 2 to 3 minutes, that is, the plastic wood is molded into the molding material according to the required corrugated structure along the direction vertical or parallel to the wood fiber and dried to remove part of the moisture in the material (moisture content is about 10%) to obtain a three-dimensional molded wood corrugated core board. The wave height of the three-dimensional molded wood corrugated core board is 1 cm and the wave distance is 1.3 cm.

[0052] Use a corrugated structure glue coating machine to apply white latex or resin glue on the outer end surfaces of the crests and troughs of the three-dimensional molded wood corrugated core board. The thickness of the adhesive is 1 mm. At room temperature, 1.5 mm thick wood veneers are placed outside the adhesive, left to stand for 10 to 20 minutes, and pressed at 0.5 to 0.8 MPa for 10 to 20 hours to bond the three-dimensional molded wood corrugated core board 1 between the two layers of wood veneers to prepare a plastic corrugated wood board with a thickness of 13 mm.

[0053] The plastic corrugated wood board is composed of two layers of wood veneers 2 arranged at a distance from each other, with a three-dimensional molded wood corrugated core board 1 between them. The three-dimensional molded wood corrugated core board is a molded material made by a molding equipment along a vertical or parallel direction of the wood fiber after the wood veneer has been delignified and air-dried and soaked in water.

[0054] The ratio of the thickness of the wood veneer to the thickness of the three-dimensional molded wood corrugated core board is 1:0.2-1. The wood veneer is a veneer of coniferous wood and broad-leaved wood, and the thickness of the wood veneer is 0.2mm, 1mm, 1.5mm, 2mm, 3mm, and 4mm respectively.

[0055] The wave height of the three-dimensional molded wood corrugated core board is 0.5 cm to 20 cm, the wave distance is 1 cm to 30 cm, and the waveform is an arc (such as Figure 1 As shown), or concave-convex, or triangular (as shown Figure 2 The plastic corrugated board is assembled such that the angle between the wood fiber direction of the adjacent wood veneer and the wood fiber direction of the three-dimensional molded wood corrugated core board is 80 to 110 degrees. 0 .

[0056] Embodiment 2: as Figures 1 to 3 As shown, the difference from Example 1 is that:

[0057] Use 2% KOH (potassium hydroxide) and 1% NaClO 2 A 2 mm thick paulownia wood veneer is subjected to a simple delignification treatment for 28 hours in a boiling aqueous solution of sodium chlorite, and then soaked in water 4 times to remove chemicals, thereby partially removing the lignin and hemicellulose of the wood veneer to obtain partially delignified wood. Under room temperature and relative humidity conditions, the partially delignified wood is air-dried for 24 hours to reduce the moisture content in the wood to below 13%, thereby obtaining shrunken wood; the shrunken wood is soaked in water for 3 minutes to obtain plastic wood, and the corrugated structure pressing mold of the present invention is used, with a molding temperature of 90°C, a drying hot air temperature of 90°C, a molding drying time of 4 to 6 minutes, and a moisture content of about 11%. The adhesive is a water-soluble phenolic resin adhesive with a solid content of 64% and a curing temperature of 120-150°C; or a one-component polyurethane (PUR): model DH 106, light brown, with an operating temperature of 5°C to 35°C, a shear strength greater than 10 MPa, a viscosity of 8000 to 20000 mpa.s at 25°C, an open time of 20 to 30 minutes, a pressurization time of 10 to 90 minutes, and an application amount of 350 to 400 g / m 2 The remaining steps are the same, so they will not be repeated here.

[0058] The material index data of the 13mm thick plastic corrugated wood board (Example 1) prepared by the present invention and the black poplar wood board and corrugated paperboard of the same thickness are tested according to the test method specified by the state as follows:

[0059]

[0060] The above index data show that the moisture resistance, sound absorption effect and corrosion resistance of the plastic corrugated wood board prepared by the present invention are better than those of the black poplar wood board and the corrugated paper board. The compressive strength and JanKa hardness of the plastic corrugated wood board prepared by the present invention are the same as those of the black poplar wood board. However, the amount of wood used by the same volume (i.e. the weight of wood by the same volume) of the present invention is only 25% of that of the black poplar wood board, which means that a large amount of wood can be saved.

[0061] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for manufacturing a plastic corrugated wood board, characterized in that: The steps include: (1) Delignification treatment of wood veneer (2): The wood veneer is delignified with a boiling aqueous solution of 2.5M NaOH and 0.4M Na2SO3 for 16 to 48 hours, and then soaked in water several times to remove chemicals, thereby partially removing lignin and hemicellulose from the wood veneer to obtain partially delignified wood; Alternatively, a simple delignification treatment is performed with an aqueous solution of 2% KOH and 1% NaClO2 for 16 to 48 hours, followed by soaking in water several times to remove chemicals, thereby partially removing the lignin and hemicellulose from the wood veneer to obtain partially delignified wood; The wood veneer is a veneer made of coniferous wood and broad-leaved wood, and the thickness of the wood veneer is 0.2mm, 1mm, 1.5mm, 2mm, 3mm, and 4mm respectively; (2) Air-drying shrinkage: Air-dry partially delignified wood for 15 to 30 h at room temperature and relative humidity to reduce the moisture content of the wood to below 13%, and the shrinkage of the wood is obtained; (3) Water immersion treatment: Soak the shrunken wood in water for 3 to 10 minutes to obtain plastic wood; (4) Compression molding: using two different compression temperatures and a corrugated structure pressing mold, plastic wood of different thicknesses is molded into molding materials according to the required corrugated structure along the direction perpendicular to or parallel to the wood fibers, and then dried to remove moisture from the molding materials. Combining the compression molding process, a three-dimensional molded wood corrugated core board (1) with a wavy corrugated structure is prepared; (5) Assembly and bonding of plastic corrugated wood boards: Use a corrugated structure glue coating machine to apply adhesive to the outer end surfaces of the crests and troughs of the three-dimensional molded wood corrugated core board, place wood veneers outside the adhesive at room temperature, let it stand for 10 to 20 minutes, and press at 0.5 to 0.8 MPa for 10 to 20 hours to make the three-dimensional molded wood corrugated core board adhere between the two layers of wood veneers to prepare a plastic corrugated wood board; The plastic corrugated wood board is a three-dimensional molded wood corrugated core board arranged between two layers of wood veneers. The three-dimensional molded wood corrugated core board is a molded material made by air-drying, water-immersing and molding equipment along the direction perpendicular to or parallel to the wood fibers of the wood veneer after delignification treatment.

2. The method according to claim 1, characterized in that: The ratio of the thickness of the wood veneer to the thickness of the three-dimensional molded wood corrugated core board is 1:0.2-1.

3. The method according to claim 1, characterized in that: The wave height of the three-dimensional molded wood corrugated core board is 0.5 cm to 20 cm, the wave distance is 1 cm to 30 cm, and the wave shape is arc, concave and convex, or triangular.

4. The method according to claim 1, characterized in that: The two molding temperatures are high temperature pressing at 100-200°C and air drying, or drying pressing at 80-90°C.

5. The method according to claim 1, characterized in that: The plastic corrugated board is assembled such that the angle between the wood fiber direction of the adjacent wood veneer and the wood fiber direction of the three-dimensional molded wood corrugated core board is 80 to 110 degrees. ° .

6. The method according to claim 1, characterized in that: The adhesive is white latex or resin glue, the required bonding temperature is 20-80°C, and the processing time is 10-60min; Or it is a water-soluble phenolic resin with a solid content of 64% and a curing temperature of 120-150°C; or it is a one-component polyurethane: model DH 106, light brown, with an operating temperature of 5°C to 35°C, a shear strength greater than 10 MPa, a viscosity of 8000 to 20000 mpa.s at 25°C, an open time of 20 to 30 min, a pressurization time of 10 to 90 min, and a sizing amount of 350 to 400 g / m 2 .

7. The method according to claim 1, characterized in that: The corrugated structure pressing mold is a mold in which the lower ends of four columns (11) are fixed on the four corners of the base (3), the movable crossbeam (10) is slidably mounted on the four columns at the upper end of the base, the upper ends of the four columns are fixed on the upper crossbeam (6), a vertical hydraulic cylinder (8) is provided in the middle of the upper crossbeam, the telescopic rod (7) of the hydraulic cylinder passes through the upper crossbeam and is connected to the middle of the upper end surface of the movable crossbeam (10), the lower end surface of the movable crossbeam is fixed with an upper chopping board (9) through a heat insulation layer (15), the base at the lower end of the movable crossbeam is fixed with a lower chopping board (4) through a heat insulation layer, the corresponding surfaces of the upper and lower chopping boards are corrugated concave-convex staggered surfaces (5), the upper and lower chopping boards are the upper and lower chopping boards of a heat-generating belt air-drying device, and pressure sensors (20) are provided on the corresponding sides of the upper and lower chopping boards.

8. The method according to claim 7, characterized in that: The lower chopping board (4) of the heat-generating belt air-drying device is hollow inside the lower chopping board to form a hot air chamber (17). The lower end surface of the lower chopping board is fixed to the base at the lower end of the movable crossbeam plate through a heat-insulating layer plate. The base (3) is a hollow base. An air duct is provided in the middle of the upper end of the base. The upper end of the air duct passes through the heat-insulating layer plate and communicates with the hot air chamber through a pipe heater (19) located in the hot air chamber. A fan (18) is provided in the air duct. A plurality of through air holes (13) are provided between the hot air chamber and the upper end surface of the lower chopping board. A plurality of electric heating tubes (14) are provided at intervals in the upper end surface wall of the lower chopping board. A temperature control sensor (12) is provided on the lower chopping board. The aperture of the air holes is 1 to 2 mm. The adjacent distance between the exposed air holes on the upper and lower chopping boards is 2 to 3 cm.

9. The method according to claim 1, characterized in that: The corrugated structure glue coating machine is located at the rear end of the corrugated structure pressing mold, and is used to run the three-dimensional molded wood corrugated core board and automatically apply adhesive to the outer end surfaces of the crests and troughs of the running three-dimensional molded wood corrugated core board, including a mechanism for moving the three-dimensional molded wood corrugated core board and a glue coating mechanism for the three-dimensional molded wood corrugated core board; The movable three-dimensional molded wood corrugated core board mechanism is as follows: a main movable shaft (33) is provided at one end of the upper part of a machine body (54) through a bearing seat (38) transversely, an input drive sprocket (37) is provided on the main movable shaft (33) outside one side of the machine body, and a movable motor (44) is provided below the input drive sprocket (37). The movable motor (44) drives the input drive sprocket (37) through a motor drive sprocket (41) and a chain to rotate the main movable shaft (33), and an output drive sprocket (37) is provided on the main movable shaft (33) outside the other side of the machine body. 4), a plurality of slave movable shafts (55) parallel to the main movable shaft (33) are arranged at a distance from the upper part of the machine body at the same level as the main movable shaft (33), and a driven transmission sprocket (43) is arranged on each slave movable shaft (55) on the same side as the output transmission sprocket, and the output transmission sprocket drives each driven transmission sprocket to rotate synchronously through a chain (40), and a plurality of master and slave movable wheels are arranged longitudinally correspondingly at a distance from each other on the master and slave movable shafts inside the machine body, and each master and slave movable wheel is supported on the inner side surface of each wave crest of the three-dimensional molded wood corrugated core board.

10. The method according to claim 1, characterized in that: The gluing mechanism of the three-dimensional molded wood corrugated core board is that a bottom mounting plate (29) is provided on the middle of the machine body (54), the lower ends of two support plates (31) are respectively located on both sides of the upper end of the bottom mounting plate (29), the upper ends of the two support plates (31) are provided with a transverse mounting plate (39), a telescopic shaft seat mounting plate (28) is provided on the transverse mounting plate, and two movable cross beam grooves (24) are provided on the telescopic shaft seat mounting plate (28) that are through-through and spaced apart from each other, and the rear end of the movable cross beam groove is provided with a plurality of movable cross beam grooves (24) that are through-through and spaced apart from each other. A plurality of telescopic shaft seats (25) are vertically arranged at intervals on a telescopic shaft seat mounting plate (28), two screw holes distributed up and down are arranged on the same telescopic shaft seat, and two fixing bolts (46) pass through two movable cross beam grooves and are screwed to the two screw holes respectively, a through slot hole for a telescopic shaft (27) to pass through is arranged in the middle of the horizontal mounting plate, the middle parts of the plurality of telescopic shafts (27) are respectively arranged in the telescopic shaft seats (25), and the upper end of the telescopic shaft is provided with a shaft that can drive the telescopic shaft to move up and down The telescopic shaft adjusting hand wheel (26) is provided, the lower end of the telescopic shaft (27) passing through the through slot hole is axially connected to the rear end of the tongue depressing rod (50), a compression spring (48) is provided between the upper end of the tongue depressing rod (50) and the lower end of the telescopic shaft, a longitudinal glue discharge rod (22) is provided at the front end of the tongue depressing rod (50), a glue box (23) is provided on the horizontal mounting plate (39) at the upper end of the glue discharge rod (22), a plurality of glue discharge ports are provided at the lower end of the glue box at intervals, and the upper end of each glue discharge rod is provided with a plurality of glue discharge ports. The end inlet is connected to the glue outlet of the glue box through a plurality of telescopic guide tubes (49), and the glue outlet holes at the lower ends of the glue outlet rods (22) are supported on the crests of the three-dimensional molded wood corrugated core board (1). A glue pressing plate (47) is provided in the glue box (23), and the periphery of the glue pressing plate (47) is sealed and slidably matched with the inner wall of the glue box (23) through a sealing ring. A counterweight block (42) is provided at the upper end of the glue pressing plate (47), and a glue injection tube (35) is provided at the bottom of the glue box; The machine body walls on both sides corresponding to the lower end of the rubber outlet are provided with longitudinal grooves. Two bearing seats (38) are arranged on the machine body outer walls on both sides of the longitudinal grooves by bolts. One side end of the lower rubber shaft (52) passes through the longitudinal groove and is axially connected to the bearing seat on the machine body outer wall. The other side end of the lower rubber shaft (52) passes through the longitudinal groove on the other side and is axially connected to the bearing seat on the machine body outer wall and is connected to the motor shaft of the rubber shaft motor (53). The rubber shaft motor (53) is fixed on an adjustable fixing plate (56). A plurality of lower rubber wheels (32) are arranged at intervals on the lower rubber shaft (52) between the machine body walls on both sides. A lower rubber box (36) is arranged on the machine body at the lower end of the lower rubber shaft. Liquid level sensors (51) are respectively arranged on the upper and lower rubber boxes. Two rubber injection hoses (35) respectively communicated with the lower ends of the upper and lower rubber boxes are communicated with the rubber pump through a conduit. The lower part of the lower rubber wheel (32) is located in the lower rubber box (36). The adhesive in the adhesive box is placed on the upper roller surface of the lower rubber wheel (32), and contacts the outer end surfaces of the troughs of the three-dimensional molded wood corrugated core board. The upper and lower rubber boxes are provided with electric heating tubes (30) and temperature control sensors.

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