CN110804721A - Wood product surface oxidation resistant coating and preparation method thereof - Google Patents
Wood product surface oxidation resistant coating and preparation method thereof Download PDFInfo
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- CN110804721A CN110804721A CN201911094513.2A CN201911094513A CN110804721A CN 110804721 A CN110804721 A CN 110804721A CN 201911094513 A CN201911094513 A CN 201911094513A CN 110804721 A CN110804721 A CN 110804721A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/04—Protective covers for the grinding wheel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/12—Devices for exhausting mist of oil or coolant; Devices for collecting or recovering materials resulting from grinding or polishing, e.g. of precious metals, precious stones, diamonds or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/07—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor involving a stationary work-table
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
- B24B7/28—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding wood
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C4/11—Oxides
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/18—After-treatment
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- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a wood product surface oxidation resistant coating and a preparation method thereof, wherein a fiber structure of pine sawdust is damaged by an ice splitting principle, a polyhydroxy fiber bundle is obtained by ball milling, the fiber bundle is mixed with tetraethoxysilane, the tetraethoxysilane is slowly hydrolyzed to generate silicon oxide which is adsorbed by hydroxyl of the fiber bundle, then silicon carbide is obtained by carbonization and high temperature reaction, the silicon carbide, aluminum powder and silver powder are mixed and sprayed on the surface of a wood product by low-pressure plasma spraying equipment, the formed oxidation resistant layer is an oxide film based on α -aluminum oxide, and is an excellent oxidation resistant material, the oxidation resistance of the oxidation resistant coating can be improved, the prepared wood product surface oxidation resistant coating is determined according to GB/T8722 ion 2008, the thermal conductivity is 1.3-1.4W/m.K, the thermal insulation temperature is determined as 280 ion, and the technical problems of poor thermal conductivity and poor thermal insulation performance of the wood product oxidation coating in the prior art are solved.
Description
Technical Field
The invention relates to the technical field of preparation of an antioxidant coating, and particularly relates to a wood product surface antioxidant coating and a preparation method thereof.
Background
The wood product is made of wood raw materials through processing, and a formed product is usually sprayed with an anti-oxidation coating on the surface of the wood product, so that the anti-oxidation property and the heat insulation property of the wood product are improved.
Patent document (CN201120005359.X) discloses a draft tube anti-oxidation coating, this coating utilizes pulling out bridging and the crackle steering mechanism of carborundum whisker to reduce crackle size and quantity in the coating, be favorable to improving the oxidation resistance and the thermal shock resistance ability of carborundum coating by a wide margin, but this coating is not applicable to wooden article surface coating, high temperature resistant and thermal conductivity are relatively poor simultaneously, prior art's equipment of polishing is difficult to fix the wooden article of height, the width difference, the saw-dust that the in-process of polishing produced is difficult for collecting simultaneously.
Disclosure of Invention
The invention aims to provide a wood product surface oxidation resistant coating and a preparation method thereof, and solves the technical problems that (1) a fiber structure of loose wood chips is damaged by an ice splitting principle, a polyhydroxy fiber bundle is obtained by ball milling, the fiber bundle is mixed with ethyl orthosilicate so that the ethyl orthosilicate is slowly hydrolyzed to generate silicon oxide which is adsorbed by hydroxyl groups of the fiber bundle, then the silicon carbide is prepared by carbonization and high-temperature reaction, the silicon carbide, aluminum powder and silver powder are mixed and sprayed on the surface of a wood product by low-pressure plasma spraying equipment, the formed oxidation resistant layer is an oxide film based on α -aluminum oxide, the aluminum oxide has extremely low oxygen diffusion coefficient, the silicon carbide is an excellent oxidation resistant material, the oxidation resistance of the oxidation resistant coating can be improved, the oxidation resistant coating of the zirconium oxide powder body contains abundant vacancy structures inside the coating, the heat conductivity coefficient can be favorably reduced, the oxidation resistant coating performance of the oxidation resistant coating is improved, the obtained oxidation resistant coating of the surface of the wood product is prepared, the heat conductivity is 1.3-1.4W/m.K according to the GB/T8722, the heat insulation temperature measurement is 280, the thermal insulation temperature measurement is used for solving the problem that the existing wood product surface oxidation resistant coating is poor, the existing wood product surface oxidation resistant coating is not easy to be prepared, the problem that the wood product surface oxidation resistant coating is not easy to be moved, the problem that the wood chip is moved, the moving of a sliding rod is not easy to be moved, the moving of a sliding rod is moved, the sliding rod clamping cylinder, the sliding rod is not easy to move, the sliding rod clamping cylinder, the sliding.
The purpose of the invention can be realized by the following technical scheme:
the surface antioxidant coating for the wooden product is prepared from the following raw materials in parts by weight: 10-15 parts of self-made silicon carbide, 45-50 parts of aluminum powder and 1-2 parts of silver powder;
the surface oxidation resistant coating of the wooden product is prepared by the following steps:
the method comprises the following steps: weighing the self-prepared silicon carbide, the aluminum powder and the silver powder in parts by weight, adding the self-prepared silicon carbide, the aluminum powder and the silver powder into a high-speed mixer, and preparing mixed powder;
step two: placing a wooden product on a supporting circular plate of polishing equipment, adjusting the heights of lifting blocks on two limiting columns, further adjusting a clamping plate to two sides of the wooden product, fastening the lifting blocks by screwing bolts, contracting a piston rod of an air cylinder, driving the clamping plate to clamp two sides of the wooden product by the limiting columns, adjusting the position of a polishing wheel in the three-axis direction, driving a telescopic rod to rotate by an output shaft of a fourth motor through a belt pulley set, driving the telescopic rod to drive the polishing wheel to polish the surface of the wooden product, preventing sawdust generated by polishing from splashing by a retaining shell, simultaneously extracting sawdust blocked by the retaining shell into a sawdust storage box through a connecting pipe by an exhaust fan for storage, and cleaning the surface of the wooden product for 3-5 times by using alcohol and acetone in sequence to obtain a pretreated wooden product;
step three: spraying and depositing the mixed powder on the surface of a pretreated wooden product by using low-pressure plasma spraying equipment, and then putting the wooden product into a vacuum heat treatment furnace for heat treatment under the protection of argon;
step four: after the heat treatment is finished, preheating the surface of the pretreated wood product to 1000-1100 ℃ by using plasma flame flow, spraying and depositing zirconium oxide on the surface of the preheated pretreated wood product by using low-pressure plasma spraying equipment, and naturally cooling to room temperature to obtain the antioxidant coating.
Further, the self-made silicon carbide is prepared by the following steps: (1) weighing pine sawdust, soaking in deionized water for 1-2h, filtering to obtain filter residue, immediately placing the filter residue in a refrigerator, and freezing to obtain frozen matter; (2) putting the frozen material into a ball mill, performing ball milling treatment for 1-2 hours to obtain a ball milling product, and mixing the ball milling product with tetraethoxysilane and an ethanol solution with the mass fraction of 10% to obtain a mixed solution; (3) putting the mixed solution into a water bath, heating to 40-50 ℃, stirring for reaction for 10-12 h, filtering and separating after the reaction is finished to obtain reaction filter residue, putting the reaction filter residue into a carbonization furnace, and carbonizing under the protection of nitrogen to obtain carbide; (4) and (3) putting the carbide into a tubular resistance furnace, sintering, taking out a sintered product, and washing with hydrofluoric acid with the mass fraction of 20% for 15-20 min to obtain the self-made silicon carbide.
Further, the freezing treatment temperature in the step (1) is-20 to-15 ℃, and the freezing treatment time is 20 to 30 min.
Further, the mass ratio of the ball-milled product in the step (2) to the ethyl orthosilicate and the ethanol solution with the mass fraction of 10% is 1-3:1-5: 10-15.
Further, the carbonization temperature in the step (3) is 300-400 ℃, and the carbonization time is 1-2 hours.
Further, the sintering vacuum degree in the step (4) is 10-15 Pa, the sintering temperature is 2000-2100 ℃, and the sintering time is 5-7 hours.
Further, the surface oxidation resistant coating of the wooden product is processed by the following steps:
the method comprises the following steps: weighing 10-15 parts of prepared silicon carbide, 45-50 parts of aluminum powder and 1-2 parts of silver powder, and adding the materials into a high-speed mixer to prepare mixed powder;
step two: placing a wooden product on a supporting circular plate of polishing equipment, adjusting the heights of lifting blocks on two limiting columns, adjusting a clamping plate to two sides of the wooden product, fastening the lifting blocks by screwing bolts, contracting a piston rod of an air cylinder, driving a moving plate on one side to move horizontally by a connecting strip, driving the moving strip to move, driving a rotating wheel to rotate by the moving strip, driving another moving strip to move horizontally by the rotating wheel, moving the two moving strips relatively, simultaneously sliding a rod sleeve at the bottom of the moving plate on a sliding rod, driving the two limiting columns to move relatively by the two moving plates, driving the clamping plate to clamp two sides of the wooden product by the limiting columns, rotating a first motor output shaft, driving a first connecting plate to move horizontally by a belt pulley group and a first ball screw, driving a second ball screw to move by the first connecting plate through a second connecting plate, and rotating a second motor output shaft, the belt pulley group and the second ball screw drive the third connecting plate to move horizontally, the third motor output shaft rotates, the belt pulley group and the third ball screw drive the fastening plate to lift, the fastening plate drives the driving telescopic rod to stretch through the bearing seat, and further drives the polishing wheel to adjust the position in the three-axis direction, the fourth motor output shaft drives the driving telescopic rod to rotate through the belt pulley group, the driving telescopic rod drives the polishing wheel to polish the surface of the wooden product, the blocking shell blocks sawdust generated by polishing from splashing, meanwhile, the exhaust fan extracts sawdust blocked by the blocking shell into the sawdust storage box through the connecting pipe to be stored, and the surface of the wooden product is sequentially cleaned by alcohol and acetone for 3-5 times, so that a pretreated wooden product is obtained;
step three: spraying and depositing the mixed powder on the surface of a pretreated wooden product by using low-pressure plasma spraying equipment, and then putting the wooden product into a vacuum heat treatment furnace for heat treatment under the protection of argon;
step four: after the heat treatment is finished, preheating the surface of the pretreated wood product to 1000-1100 ℃ by using plasma flame flow, spraying and depositing zirconium oxide on the surface of the preheated pretreated wood product by using low-pressure plasma spraying equipment, and naturally cooling to room temperature to obtain the antioxidant coating.
Furthermore, in the third step, the temperature of spraying deposition is 2350-2400 ℃, the thickness of the spraying deposition is 45-50 μm, the temperature of heat treatment is 800-850 ℃, and the time of the heat treatment is 3-5 hours.
Further, the spraying parameters of the low-pressure plasma spraying equipment in the fourth step are as follows: the power is 125-130 kW, the spraying distance is 650-660 mm, the spraying speed is 25-35 mm/s, and the flow of main gas argon is 50-80 dm3Permin, 5-8 dm of secondary gas hydrogen flow3The powder feeding rate is 18-20 g/min, and the pressure is 1.5-1.6 mbar.
Further, the working steps of the grinding equipment are as follows:
placing a wooden product on a supporting circular plate of polishing equipment, adjusting the heights of lifting blocks on two limiting columns, adjusting a clamping plate to two sides of the wooden product, fastening the lifting blocks by screwing bolts, contracting a piston rod of an air cylinder, driving a moving plate on one side to move horizontally by a connecting strip, driving the moving strip to move, driving a rotating wheel to rotate by the moving strip, driving another moving strip to move horizontally by the rotating wheel, moving the two moving strips relatively, simultaneously sliding a rod sleeve at the bottom of the moving plate on a sliding rod, driving the two limiting columns to move relatively by the two moving plates, driving the clamping plate to clamp two sides of the wooden product by the limiting columns, rotating a first motor output shaft, driving a first connecting plate to move horizontally by a belt pulley group and a first ball screw, driving a second ball screw to move by the first connecting plate through a second connecting plate, and rotating a second motor output shaft, and then drive the third connecting plate horizontal direction through band pulley group and second ball and remove, third motor output shaft rotates, and then drive the mounting plate through band pulley group and third ball and go up and down, the mounting plate drives the drive telescopic link through the bearing frame and stretches out and draws back, and then drive the adjustment of emery wheel triaxial direction position, fourth motor output shaft drives the drive telescopic link through band pulley group and rotates, the drive telescopic link drives the emery wheel and polishes wooden article surface, the fender shell blocks that the saw-dust that polishes the production splashes, the air exhauster passes through the connecting pipe and extracts the saw-dust that the fender shell blockked to store in the storage bits incasement simultaneously.
The invention has the beneficial effects that:
(1) the invention relates to a wood product surface oxidation resistant coating and a preparation method thereof, wherein a fiber structure of pine sawdust is damaged by an ice splitting principle, a polyhydroxy fiber bundle is obtained by ball milling, the fiber bundle is mixed with tetraethoxysilane, tetraethoxysilane is slowly hydrolyzed to generate silicon oxide which is adsorbed by hydroxyl of the fiber bundle, then silicon carbide is obtained by carbonization and high temperature reaction, the silicon carbide, aluminum powder and silver powder are mixed and sprayed on the surface of a wood product by low-pressure plasma spraying equipment, the formed oxidation resistant layer is an oxide film based on α -aluminum oxide, the aluminum oxide has extremely low oxygen diffusion coefficient, is an excellent oxidation resistant material, can improve the oxidation resistance of the oxidation resistant coating, the zirconium oxide powder coating contains abundant vacancy structures inside, is favorable for reducing the heat conduction coefficient and improving the heat insulation performance of the oxidation resistant coating, the obtained wood product surface oxidation resistant coating is prepared, according to GB/T8722-2008, the heat insulation temperature is determined to be 280-doped 295 ℃;
(2) the height of the lifting blocks on the two limiting columns is adjusted, the clamping plates are adjusted to two sides of a wooden product, the lifting blocks are fastened by screwing bolts, a piston rod of the air cylinder contracts, the movable plate on one side is driven by the connecting strip to move in the horizontal direction, the movable plate drives the movable strips to move, the movable strips drive the rotating wheels to rotate, the rotating wheels drive the other movable strip to move in the horizontal direction, the two movable strips move relatively, meanwhile, a rod sleeve at the bottom of the movable plate slides on the sliding rod, the two movable plates drive the two limiting columns to move relatively, the limiting columns drive the clamping plates to clamp two sides of the wooden product, and through the arrangement, the grinding equipment can fix the wooden product with different heights and widths, the structure is simple, and the fixing effect;
(3) the first motor output shaft rotates, the first connecting plate is driven to move horizontally through the belt pulley group and the first ball screw, the first connecting plate drives the second ball screw to move through the second connecting plate, the second motor output shaft rotates, the third connecting plate is driven to move horizontally through the belt pulley group and the second ball screw, the third motor output shaft rotates, the fastening plate is driven to lift through the belt pulley group and the third ball screw, the fastening plate drives the driving telescopic rod to stretch through the bearing seat, the three-axis position adjustment of the polishing wheel is further driven, through the arrangement, the polishing equipment can polish wood products in different heights and positions in multiple directions, the practicability is high, the fourth motor output shaft drives the driving telescopic rod to rotate through the belt pulley group, the driving telescopic rod drives the polishing wheel to polish the surface of the wood products, and the guard shell blocks wood chips generated by polishing from splashing, simultaneously the air exhauster will keep off the saw-dust extraction that the shell blockked down through the connecting pipe and save to storing up the bits incasement, through this setting, effectively prevent the saw-dust that produces at the process of polishing from splashing, the collection of easily saw-dust, environmental protection effect is good.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the construction of the sanding apparatus of the present invention;
FIG. 2 is an installation view of a restraint post of the present invention;
FIG. 3 is a front view of FIG. 2 of the present invention;
fig. 4 is an installation view of the grinding wheel of the present invention.
In the figure: 1. a base; 2. a fixed mount; 3. a support block; 4. a support plate; 5. a cylinder; 6. a connecting strip; 7. a moving bar; 71. moving the plate; 8. a rod sleeve; 9. a slide bar; 10. a rotating wheel; 101. a supporting circular plate; 11. mounting a plate; 12. a limiting column; 13. a lifting block; 131. a bolt; 14. a clamping plate; 15. a first motor; 16. a first ball screw; 161. a first connecting plate; 17. a second connecting plate; 171. a second ball screw; 18. a second motor; 19. a third connecting plate; 20. a third motor; 21. a third ball screw; 211. a fastening plate; 22. a bearing seat; 23. grinding the wheel; 24. a fourth motor; 25. driving the telescopic rod; 26. a blocking shell; 27. a connecting pipe; 28. a scrap storage box.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The surface antioxidant coating for the wooden product is prepared from the following raw materials in parts by weight: 10 parts of self-prepared silicon carbide, 45 parts of aluminum powder and 1 part of silver powder;
the surface oxidation resistant coating of the wooden product is prepared by the following steps:
the method comprises the following steps: weighing the self-prepared silicon carbide, the aluminum powder and the silver powder in parts by weight, adding the self-prepared silicon carbide, the aluminum powder and the silver powder into a high-speed mixer, and preparing mixed powder;
step two: placing a wooden product on a supporting circular plate 101, adjusting the height of a lifting block 13 on two limiting columns 12, further adjusting clamping plates 14 to two sides of the wooden product, screwing a bolt 131 to fasten the lifting block 13, contracting a piston rod of an air cylinder 5, further driving a moving plate 71 on one side to move horizontally through a connecting strip 6, driving a moving strip 7 to move by the moving plate 71, driving a rotating wheel 10 to rotate by the moving strip 7, further driving another moving strip 7 to move horizontally by the rotating wheel 10, moving the two moving strips 7 relatively, simultaneously driving a rod sleeve 8 at the bottom of the moving plate 71 to slide on a sliding rod 9, driving two limiting columns 12 to move relatively by the two moving plates 71, driving the clamping plates 14 by the limiting columns 12 to clamp two sides of the wooden product, rotating an output shaft of a first motor 15, further driving a first connecting plate 161 to move horizontally through a pulley set and the first ball screw 16, driving a second ball screw 16 to move by the first connecting plate 161 through a second connecting, an output shaft of a second motor 18 rotates, and then drives a third connecting plate 19 to move in the horizontal direction through a belt pulley group and a second ball screw 16, an output shaft of a third motor 20 rotates, and then drives a fastening plate 211 to lift through the belt pulley group and a third ball screw 21, the fastening plate 211 drives a driving telescopic rod 25 to stretch through a bearing seat 22, and then drives a polishing wheel 23 to adjust the position in the three-axis direction, an output shaft of a fourth motor 24 drives the driving telescopic rod 25 to rotate through the belt pulley group, the driving telescopic rod 25 drives the polishing wheel 23 to polish the surface of a wooden product, a blocking shell 26 blocks sawdust generated by polishing from splashing, meanwhile, an exhaust fan extracts sawdust blocked by the blocking shell 26 into a sawdust storage box 28 through a connecting pipe 27 to be stored, and the surface of the wooden product is sequentially cleaned for 3 times by alcohol and acetone, so as;
step three: spraying and depositing the mixed powder on the surface of a pretreated wooden product by using low-pressure plasma spraying equipment, and then putting the wooden product into a vacuum heat treatment furnace for heat treatment under the protection of argon;
step four: after the heat treatment is finished, preheating the surface of the pretreated wood product to 1000 ℃ by using plasma flame flow, spraying and depositing zirconium oxide on the surface of the preheated pretreated wood product by using low-pressure plasma spraying equipment, and naturally cooling to room temperature to obtain the antioxidant coating.
Specifically, the self-prepared silicon carbide is prepared by the following steps: (1) weighing pine sawdust, soaking in deionized water for 1h, filtering and separating to obtain filter residue, immediately placing the filter residue in a refrigerator, and freezing to obtain a frozen substance; (2) putting the frozen matter into a ball mill, performing ball milling treatment for 1h to obtain a ball milling product, and mixing the ball milling product with ethyl orthosilicate and an ethanol solution with the mass fraction of 10% to obtain a mixed solution; (3) putting the mixed solution into a water bath kettle, heating to 40 ℃, stirring for reaction for 10 hours, filtering and separating after the reaction is finished to obtain reaction filter residue, putting the reaction filter residue into a carbonization furnace, and carbonizing under the protection of nitrogen to obtain carbide; (4) and (3) putting the carbide into a tubular resistance furnace, sintering, taking out a sintered product, and washing the sintered product for 15min by using hydrofluoric acid with the mass fraction of 20% to obtain the self-made silicon carbide. The freezing treatment temperature in the step (1) is-20 ℃, and the freezing treatment time is 20 min. The mass ratio of the ball-milling product in the step (2) to the ethyl orthosilicate and the ethanol solution with the mass fraction of 10% is 1:1: 10. The temperature of the carbonization in the step (3) is 30 DEGThe carbonization time is 1h at 0 ℃. The sintering vacuum degree in the step (4) is 10Pa, the sintering temperature is 2000 ℃, and the sintering time is 5 h. In the third step, the temperature of spraying deposition is 2350 deg.C, the thickness of spraying deposition is 45 μm, the temperature of heat treatment is 800 deg.C, and the time of heat treatment is 3 h. The spraying parameters of the low-pressure plasma spraying equipment in the fourth step are as follows: the power is 125kW, the spraying distance is 650mm, the spraying speed is 25mm/s, and the main gas argon flow is 50dm3Permin, 5dm of secondary hydrogen flow3Min, powder feeding rate 18g/min, pressure 1.5 mbar.
The thermal conductivity of the surface oxidation resistant coating of the wooden product in the embodiment 1 is 1.4W/m.K, and the heat insulation temperature is 280 ℃.
Example 2
The surface antioxidant coating for the wooden product is prepared from the following raw materials in parts by weight: 15 parts of self-made silicon carbide, 50 parts of aluminum powder and 2 parts of silver powder;
wherein, the step two: cleaning the surface of the wooden product with alcohol and acetone for 3 times and changing the cleaning process into 5 times; the remaining steps were the same as in example 1.
Specifically, the self-prepared silicon carbide is prepared by the following steps: (1) weighing pine sawdust, soaking in deionized water for 2h, filtering and separating to obtain filter residue, immediately placing the filter residue in a refrigerator, and freezing to obtain a frozen substance; (2) putting the frozen matter into a ball mill, performing ball milling treatment for 2 hours to obtain a ball milling product, and mixing the ball milling product with ethyl orthosilicate and an ethanol solution with the mass fraction of 10% to obtain a mixed solution; (3) putting the mixed solution into a water bath, heating to 50 ℃, stirring for reaction for 12 hours, filtering and separating after the reaction is finished to obtain reaction filter residue, putting the reaction filter residue into a carbonization furnace, and carbonizing under the protection of nitrogen to obtain carbide; (4) and (3) putting the carbide into a tubular resistance furnace, sintering, taking out a sintered product, and washing the sintered product for 20min by using hydrofluoric acid with the mass fraction of 20% to obtain the self-made silicon carbide. The freezing treatment temperature in the step (1) is-15 ℃, and the freezing treatment time is 30 min. The mass ratio of the ball-milling product in the step (2) to the ethyl orthosilicate and the ethanol solution with the mass fraction of 10% is 3:5: 15. The temperature of carbonization in the step (3) is 400 ℃, and the time of carbonization is 2h. The sintering vacuum degree in the step (4) is 15Pa, the sintering temperature is 2100 ℃, and the sintering time is 7 h. In the third step, the temperature of spray deposition is 2400 ℃, the thickness of spray deposition is 50 μm, the temperature of heat treatment is 850 ℃, and the time of heat treatment is 5 h. The spraying parameters of the low-pressure plasma spraying equipment in the fourth step are as follows: the power is 130kW, the spraying distance is 660mm, the spraying speed is 35mm/s, and the main gas argon flow is 80dm3Permin, secondary hydrogen flow 8dm3Min, powder feeding rate 20g/min, pressure 1.6 mbar.
The thermal conductivity of the surface oxidation resistant coating of the wooden product in the embodiment 2 is 1.3W/m.K, and the heat insulation temperature is 295 ℃.
The polishing equipment comprises a base 1 and a fixing frame 2, wherein two supporting blocks 3 are fixedly arranged on the base 1, the two supporting blocks 3 are respectively and fixedly connected with two sides of the bottom of a supporting plate 4, an air cylinder 5 is also fixedly arranged on the lower surface of the supporting plate 4, and a piston rod of the air cylinder 5 is fixedly connected with a connecting strip 6;
the two sides of the length direction of the upper surface of the supporting plate 4 are fixedly provided with sliding rods 9, rotating wheels 10 are arranged between the sliding rods 9 on the two sides, the rotating wheels 10 are rotatably arranged on the upper surface of the supporting plate 4, the sliding rods 9 are slidably provided with moving plates 71 through rod sleeves 8, two moving strips 7 are symmetrically fixed on the two moving plates 71 along the center of the circle of the rotating wheels 10, the two moving strips 7 are respectively contacted with the two sides of the rotating wheels 10, the connecting strip 6 is fixedly connected with one of the moving plates 71, the upper surfaces of the two moving plates 71 are symmetrically fixed with two limiting columns 12, through grooves are formed in the limiting columns 12, bolts 131 are slidably penetrated in the through grooves, the bolts 131 rotatably penetrate through the lifting blocks 13, clamping plates 14 are fixedly arranged at the end parts of the bolts 131, and;
a first motor 15 is fixedly arranged in the fixed frame 2, an output shaft of the first motor 15 is connected with one end of a first ball screw 16 through a belt pulley set in a transmission way, the first ball screw 16 is arranged at the top of the fixed frame 2, a connecting piece on the first ball screw 16 is fixedly connected with a first connecting plate 161, a second connecting plate 17 is vertically arranged on the upper surface of the first connecting plate 161, a second ball screw 171 is arranged on one side of the second connecting plate 17, a second motor 18 is arranged on one side of the second connecting plate 17 far away from the second ball screw 171, the second motor 18 is connected with the second ball screw 171 through a belt pulley set in a transmission way, a connecting piece on the second ball screw 171 is fixedly connected with a third connecting plate 19, a third ball screw 21 is arranged on the third connecting plate 19, the third ball screw 21 is connected with an output shaft of a third motor 20 through a belt pulley set in a transmission way, the third motor 20 is arranged at the top of the second, the fender shell 26 is still installed to mounting plate 211 bottom, the bearing frame 22 internal rotation is provided with drive telescopic link 25, the cover is equipped with grinding wheel 23 on the drive telescopic link 25, fender shell 26 sets up in grinding wheel 23 one side, the output shaft of fourth motor 24 is connected through the drive of the wheel group at drive telescopic link 25 top, the intercommunication has connecting pipe 27 on the fender shell 26, connecting pipe 27 is kept away from fender shell 26 one end and is linked to storage bits case 28 lateral wall, the air exhauster is installed at storage bits case 28 top, and storage bits case 28 installs in base 1 top.
Referring to fig. 1-4, the working process of the polishing apparatus of the present embodiment is as follows:
placing a wooden product on a supporting circular plate 101, adjusting the height of a lifting block 13 on two limiting columns 12, further adjusting clamping plates 14 to two sides of the wooden product, screwing a bolt 131 to fasten the lifting block 13, contracting a piston rod of an air cylinder 5, further driving a moving plate 71 on one side to move horizontally through a connecting strip 6, driving a moving strip 7 to move by the moving plate 71, driving a rotating wheel 10 to rotate by the moving strip 7, further driving another moving strip 7 to move horizontally by the rotating wheel 10, moving the two moving strips 7 relatively, simultaneously driving a rod sleeve 8 at the bottom of the moving plate 71 to slide on a sliding rod 9, driving two limiting columns 12 to move relatively by the two moving plates 71, driving the clamping plates 14 by the limiting columns 12 to clamp two sides of the wooden product, rotating an output shaft of a first motor 15, further driving a first connecting plate 161 to move horizontally through a pulley set and the first ball screw 16, driving a second ball screw 16 to move by the first connecting plate 161 through a second connecting, the output shaft of second motor 18 rotates, and then it removes to drive 19 horizontal directions of third connecting plate through band pulley group and second ball 16, third motor 20 output shaft rotates, and then it goes up and down to drive mounting plate 211 through band pulley group and third ball 21, mounting plate 211 passes through bearing frame 22 and drives drive telescopic link 25 flexible, and then drive 23 triaxial direction position adjustment of emery wheel, 24 output shafts of fourth motor drive telescopic link 25 through the band pulley group and rotate, drive telescopic link 25 drives emery wheel 23 and polishes wooden article surface, fender shell 26 blocks that polish the saw-dust that produces and splashes, simultaneously the air exhauster is through connecting pipe 27 with the saw-dust extraction that fender shell 26 blockked down to storing up in the bits case 28 and save.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (10)
1. The surface antioxidant coating for the wooden product is characterized by being prepared from the following raw materials in parts by weight: 10-15 parts of self-made silicon carbide, 45-50 parts of aluminum powder and 1-2 parts of silver powder;
the surface oxidation resistant coating of the wooden product is prepared by the following steps:
the method comprises the following steps: weighing the self-prepared silicon carbide, the aluminum powder and the silver powder in parts by weight, adding the self-prepared silicon carbide, the aluminum powder and the silver powder into a high-speed mixer, and preparing mixed powder;
step two: placing a wooden product on a supporting circular plate of polishing equipment, adjusting the heights of lifting blocks on two limiting columns, further adjusting a clamping plate to two sides of the wooden product, fastening the lifting blocks by screwing bolts, contracting a piston rod of an air cylinder, driving the clamping plate to clamp two sides of the wooden product by the limiting columns, adjusting the position of a polishing wheel in the three-axis direction, driving a telescopic rod to rotate by an output shaft of a fourth motor through a belt pulley set, driving the telescopic rod to drive the polishing wheel to polish the surface of the wooden product, preventing sawdust generated by polishing from splashing by a retaining shell, simultaneously extracting sawdust blocked by the retaining shell into a sawdust storage box through a connecting pipe by an exhaust fan for storage, and cleaning the surface of the wooden product for 3-5 times by using alcohol and acetone in sequence to obtain a pretreated wooden product;
step three: spraying and depositing the mixed powder on the surface of a pretreated wooden product by using low-pressure plasma spraying equipment, and then putting the wooden product into a vacuum heat treatment furnace for heat treatment under the protection of argon;
step four: after the heat treatment is finished, preheating the surface of the pretreated wood product to 1000-1100 ℃ by using plasma flame flow, spraying and depositing zirconium oxide on the surface of the preheated pretreated wood product by using low-pressure plasma spraying equipment, and naturally cooling to room temperature to obtain the antioxidant coating.
2. The wood surface oxidation resistant coating as claimed in claim 1, wherein the self-made silicon carbide is prepared by the following steps: (1) weighing pine sawdust, soaking in deionized water for 1-2h, filtering to obtain filter residue, immediately placing the filter residue in a refrigerator, and freezing to obtain frozen matter; (2) putting the frozen material into a ball mill, performing ball milling treatment for 1-2 hours to obtain a ball milling product, and mixing the ball milling product with tetraethoxysilane and an ethanol solution with the mass fraction of 10% to obtain a mixed solution; (3) putting the mixed solution into a water bath, heating to 40-50 ℃, stirring for reaction for 10-12 h, filtering and separating after the reaction is finished to obtain reaction filter residue, putting the reaction filter residue into a carbonization furnace, and carbonizing under the protection of nitrogen to obtain carbide; (4) and (3) putting the carbide into a tubular resistance furnace, sintering, taking out a sintered product, and washing with hydrofluoric acid with the mass fraction of 20% for 15-20 min to obtain the self-made silicon carbide.
3. The wood product surface oxidation resistant coating as claimed in claim 1, wherein the freezing treatment temperature in the step (1) is-20 to-15 ℃, and the freezing treatment time is 20 to 30 min.
4. The wood product surface oxidation resistant coating as claimed in claim 1, wherein the mass ratio of the ball-milled product in the step (2) to the ethyl orthosilicate and the ethanol solution with the mass fraction of 10% is 1-3:1-5: 10-15.
5. The wood product surface oxidation resistant coating as claimed in claim 1, wherein the carbonization temperature in the step (3) is 300-400 ℃, and the carbonization time is 1-2 h.
6. The wood product surface oxidation resistant coating as claimed in claim 1, wherein the degree of vacuum of sintering in step (4) is 10-15 Pa, the sintering temperature is 2000-2100 ℃, and the sintering time is 5-7 h.
7. The preparation method of the oxidation-resistant coating on the surface of the wooden product is characterized in that the oxidation-resistant coating on the surface of the wooden product is obtained by processing the following steps:
the method comprises the following steps: weighing 10-15 parts of prepared silicon carbide, 45-50 parts of aluminum powder and 1-2 parts of silver powder, and adding the materials into a high-speed mixer to prepare mixed powder;
step two: placing a wooden product on a supporting circular plate of polishing equipment, adjusting the heights of lifting blocks on two limiting columns, adjusting a clamping plate to two sides of the wooden product, fastening the lifting blocks by screwing bolts, contracting a piston rod of an air cylinder, driving a moving plate on one side to move horizontally by a connecting strip, driving the moving strip to move, driving a rotating wheel to rotate by the moving strip, driving another moving strip to move horizontally by the rotating wheel, moving the two moving strips relatively, simultaneously sliding a rod sleeve at the bottom of the moving plate on a sliding rod, driving the two limiting columns to move relatively by the two moving plates, driving the clamping plate to clamp two sides of the wooden product by the limiting columns, rotating a first motor output shaft, driving a first connecting plate to move horizontally by a belt pulley group and a first ball screw, driving a second ball screw to move by the first connecting plate through a second connecting plate, and rotating a second motor output shaft, the belt pulley group and the second ball screw drive the third connecting plate to move horizontally, the third motor output shaft rotates, the belt pulley group and the third ball screw drive the fastening plate to lift, the fastening plate drives the driving telescopic rod to stretch through the bearing seat, and further drives the polishing wheel to adjust the position in the three-axis direction, the fourth motor output shaft drives the driving telescopic rod to rotate through the belt pulley group, the driving telescopic rod drives the polishing wheel to polish the surface of the wooden product, the blocking shell blocks sawdust generated by polishing from splashing, meanwhile, the exhaust fan extracts sawdust blocked by the blocking shell into the sawdust storage box through the connecting pipe to be stored, and the surface of the wooden product is sequentially cleaned by alcohol and acetone for 3-5 times, so that a pretreated wooden product is obtained;
step three: spraying and depositing the mixed powder on the surface of a pretreated wooden product by using low-pressure plasma spraying equipment, and then putting the wooden product into a vacuum heat treatment furnace for heat treatment under the protection of argon;
step four: after the heat treatment is finished, preheating the surface of the pretreated wood product to 1000-1100 ℃ by using plasma flame flow, spraying and depositing zirconium oxide on the surface of the preheated pretreated wood product by using low-pressure plasma spraying equipment, and naturally cooling to room temperature to obtain the antioxidant coating.
8. The method for preparing the oxidation-resistant coating on the surface of the wooden product as claimed in claim 7, wherein the spraying deposition temperature in the third step is 2350-2400 ℃, the spraying deposition thickness is 45-50 μm, the heat treatment temperature is 800-850 ℃, and the heat treatment time is 3-5 h.
9. The method for preparing the oxidation-resistant coating on the surface of the wooden product according to claim 7, wherein the spraying parameters of the low-pressure plasma spraying equipment in the fourth step are as follows: the power is 125-130 kW, the spraying distance is 650-660 mm, the spraying speed is 25-35 mm/s, and the flow of main gas argon is 50-80 dm3Permin, 5-8 dm of secondary gas hydrogen flow3The powder feeding rate is 18-20 g/min, and the pressure is 1.5-1.6 mbar.
10. The method for preparing the oxidation-resistant coating on the surface of the wooden product as claimed in claim 7, wherein the working steps of the grinding equipment are as follows:
placing a wooden product on a supporting circular plate, adjusting the heights of lifting blocks on two limiting columns, adjusting a clamping plate to two sides of the wooden product, screwing a bolt to fasten the lifting blocks, contracting a piston rod of an air cylinder, driving a moving plate on one side to move horizontally through a connecting strip, driving the moving strip to move, driving a rotating wheel to rotate through the moving strip, driving another moving strip to move horizontally through the rotating wheel, driving the two moving strips to move relatively, driving a rod sleeve at the bottom of the moving plate to slide on a sliding rod, driving the two limiting columns to move relatively through the two moving plates, driving the clamping plate to clamp two sides of the wooden product through the limiting columns, driving a first motor output shaft to rotate, driving a first connecting plate to move horizontally through a pulley set and a first ball screw, driving a second ball screw to move through a second connecting plate, and driving a second motor output shaft to rotate, and then drive the third connecting plate horizontal direction through band pulley group and second ball and remove, third motor output shaft rotates, and then drive the mounting plate through band pulley group and third ball and go up and down, the mounting plate drives the drive telescopic link through the bearing frame and stretches out and draws back, and then drive the adjustment of emery wheel triaxial direction position, fourth motor output shaft drives the drive telescopic link through band pulley group and rotates, the drive telescopic link drives the emery wheel and polishes wooden article surface, the fender shell blocks that the saw-dust that polishes the production splashes, the air exhauster passes through the connecting pipe and extracts the saw-dust that the fender shell blockked to store in the storage bits incasement simultaneously.
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| CN112062506A (en) * | 2020-08-23 | 2020-12-11 | 汤忠武 | Crop straw waste composite concrete and preparation method thereof |
| CN116853784A (en) * | 2023-05-26 | 2023-10-10 | 泰山石膏(四川)有限公司 | Gypsum board panel turnover |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112062506A (en) * | 2020-08-23 | 2020-12-11 | 汤忠武 | Crop straw waste composite concrete and preparation method thereof |
| CN116853784A (en) * | 2023-05-26 | 2023-10-10 | 泰山石膏(四川)有限公司 | Gypsum board panel turnover |
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