A pouring process and equipment for the surface of a wood-based board body

Abstract

The present invention relates to the field of surface coating processes for wood-based panels, and particularly to a pouring coating process and equipment for the surface of a wood-based panel body. The key points of the pouring coating process are as follows: an annular edge-sealing groove is formed along the contour line of the set shape on the wood-based panel, and a pouring coating liquid is poured onto the annular edge-sealing groove and the surface of the wood-based panel by using pouring coating equipment. After the pouring coating liquid is cured, a coating integrated with the wood-based panel is formed. After removing the outer edge part of the solid coating on the panel contour line, a wood-based panel product with a thick paint film coating is obtained through processing. The pouring coating equipment includes a pouring coating device, a pouring coating liquid combing device, and a container. The pouring coating device includes a liquid outlet nozzle, and a stirrer is arranged in the liquid outlet nozzle. The pouring coating liquid combing device includes a combing plate lifting mechanism and a combing plate, and the combing plate is installed on the combing plate lifting mechanism. Due to the adoption of the above process and equipment, the present invention can produce wood-based panel products with high hardness and thick paint film coatings.

Description

Technical Field

[0001] The present invention relates to a pouring process for the surface of a board body, which uses an unsaturated resin paint with high solid content and high hardness to coat the surface of a wood board.

[0002] The present invention also relates to a pouring device for the surface of a wood board body. Background Art

[0003] The coating process using an unsaturated resin paint with high solid content, high hardness and a polishable mirror surface on the surface of a wood board is a high-end coating process applied to piano outer shells and similar boards. The existing coating process uses brushing and spraying methods. Among them, the brushing method is usually carried out manually. The manual brushing method has the disadvantages of low efficiency and difficult quality control. The spraying method generally uses an automatic spraying production line by a manipulator. When spraying the edges of the board, in order to achieve a certain film thickness, it often requires dozens of repeated sprays. Since the sprayed film thickness is thin, the film thickness of the edges of the board after dozens of sprays is still difficult to reach a satisfactory level, which causes great difficulties in the grinding and polishing processes, such as easy sanding through and polishing edge damage and other quality problems. For the planar pouring process of the board, especially when using a two-component unsaturated resin paint, it is not easy to pour a relatively thick film in one go, and it is necessary to pour repeatedly in multiple passes to obtain an ideal film thickness. The multi-pass process has low work efficiency and high quality control difficulty. In summary, the existing coating process using an unsaturated resin paint with high solid content, high hardness and a polishable mirror surface on the surface of a wood board has the disadvantages of large environmental pollution, a large amount of harmful substance emissions in the spraying process, difficulty in obtaining a relatively thick film, especially the film at the edge part is not thick enough, difficult to grind, easy to sand through by machine grinding, difficult to control the accuracy, numerous processes, long production cycle and low industrialization level. Summary of the Invention

[0004] Aiming at the disadvantages of the existing coating process using an unsaturated resin paint with high solid content, high hardness and a polishable mirror surface on the surface of a wood board, such as large environmental pollution, a large amount of harmful substance emissions in the spraying process, difficulty in obtaining a relatively thick film, especially the film at the edge part is not thick enough, difficult to grind, easy to sand through by machine grinding, difficult to control the accuracy, numerous processes, long production cycle and low industrialization level, the purpose of the present invention is to provide a pouring process for the surface of a wood board body using an unsaturated resin paint with high solid content and high hardness, which has a simple process, high production efficiency, easy quality control and meets environmental protection requirements. The purpose of the present invention is also to provide a device for pouring on the surface of a wood board body.

[0005] The technical solution adopted for the purpose of the present invention is completed in the following manner:

[0006] A pouring process for the surface of a wooden board main body. The material of the wooden board used in the pouring process for the surface of the wooden board main body is density board, multi-layer solid wood board and particle board. Among them, the density board includes high-density board, medium-density board and low-density board. The key points of the pouring process for the surface of the wooden board main body are: setting the required board shape on the board surface of the wooden board, opening an annular edge-sealing groove along the contour line of the set shape on the board surface of the wooden board, pouring the pouring liquid through the pouring equipment into the annular edge-sealing groove on the wooden board and on the board surface of the wooden board to form a coating. Among them, the pouring liquid includes high-solid-content paint and curing agent. After the pouring liquid is cured, a solid shell combined with the wooden board is formed. After removing the outer edge part of the solid shell of the board contour line, a wooden board product with a high-hardness and thick paint film coating is obtained through processing.

[0007] Further, the components of the high-solid-content paint in the pouring liquid include unsaturated resin paint, accelerator and pigment paste.

[0008] Further, there is no styrene or a small amount of styrene in the unsaturated resin paint.

[0009] Further, the unsaturated resin paint used is 196 resin.

[0010] Further, the mass ratio of the components of the high-solid-content paint is: 100 parts of unsaturated resin paint, 1 - 4 parts of accelerator, and 3 - 6 parts of pigment paste.

[0011] Further, the curing agent in the pouring liquid used is initiator L liquid.

[0012] Further, the mass ratio of the high-solid-content paint to the curing agent in the pouring liquid is 100:2 - 5.

[0013] In the pouring process for the surface of the wooden board main body described above, the pouring process is: First, open a lower annular edge-sealing groove at the contour line of the set wooden board product shape on the bottom surface of the wooden board to be processed. There is a demolding strip outside the lower annular edge-sealing groove on the bottom surface of the wooden board to be processed. The demolding strip encloses a disk-shaped closed area along the outside of the lower annular edge-sealing groove; pour the pouring liquid through the liquid outlet nozzle on the pouring device in the pouring equipment into the lower annular edge-sealing groove on the bottom surface of the wooden board to be processed and into the disk-shaped closed area enclosed by the demolding strip on the bottom surface. After the pouring liquid is cured, open an upper annular edge-sealing groove at the position on the top surface of the wooden board that coincides with the lower annular edge-sealing groove on the bottom surface of the wooden board. The upper annular edge-sealing groove is communicated with the lower annular edge-sealing groove. The depth dimension of the upper annular edge-sealing groove is greater than the dimension of the thickness of the wooden board minus the depth of the lower annular edge-sealing groove on the bottom surface of the wooden board. It is expressed by the formula: H 2>H—H1, where: H is the thickness of the wood-based panel, H1 is the depth of the lower annular edge-sealing groove, and H2 is the depth of the upper annular edge-sealing groove; a demolding strip is provided outside the upper annular edge-sealing groove on the top surface of the wood-based panel to be processed, and the demolding strip encloses a disk-shaped closed area along the outside of the upper annular edge-sealing groove; the coating liquid is sprayed into the upper annular edge-sealing groove on the top surface of the wood-based panel to be processed and into the disk-shaped closed area enclosed by the demolding strip on the top surface through the liquid outlet nozzle on the spraying device in the spraying equipment. After the coating liquid is cured, it is processed according to the set shape of the panel, and a wood-based panel product with a high-hardness and thick paint film coating on the overall surface of the wood-based panel is obtained.

[0014] Further, a lower demolding strip positioning groove for fixing the demolding strip is provided outside the lower annular edge-sealing groove on the bottom surface of the wood-based panel to be processed.

[0015] Further, an upper demolding strip positioning groove for fixing the demolding strip is provided outside the upper annular edge-sealing groove on the top surface of the wood-based panel to be processed.

[0016] Further, the demolding strip is made of a plastic strip or a wooden strip.

[0017] Further, the demolding strip is a rectangular demolding strip with a rectangular head structure;

[0018] Further, a first convex tongue is provided at the bottom of the rectangular demolding strip;

[0019] Further, in the spraying process on the surface of a wood-based panel body, the cross-section of the upper annular edge-sealing groove is in an inverted L shape.

[0020] Further, the demolding strip is an arc-shaped demolding strip with an arc-shaped head structure;

[0021] Further, a second convex tongue is provided at the bottom of the arc-shaped demolding strip;

[0022] Further, in the spraying process on the surface of a wood-based panel body, the cross-section of the upper annular edge-sealing groove is in an inverted right-angled triangle.

[0023] Further, when the liquid outlet nozzle on the spraying device in the spraying equipment sprays the coating liquid into the lower annular edge-sealing groove and the upper annular edge-sealing groove of the wood-based panel to be processed, the movement of the liquid outlet nozzle is along the annular line trajectory formed by the center line of the annular edge-sealing groove.

[0024] Further, when the liquid outlet nozzle on the spraying device in the spraying equipment sprays the coating liquid on the bottom surface and the top surface of the wood-based panel to be processed, the movement of the liquid outlet nozzle is along a serpentine line trajectory.

[0025] Further, the working temperature of the curtain coating process is controlled at 20°C to 35°C.

[0026] A curtain coating device for the surface of a wooden board main body, the curtain coating device includes a bed body, a moving bracket, a curtain coating device, a first container, a second container and an electrical cabinet. The top surface of the bed body is provided with a curtain coating table for placing curtain coated boards. Longitudinal guide rails are provided on both sides of the bed body. The moving bracket is installed on the longitudinal guide rails on the bed body. A transverse guide rail is provided on the moving bracket. The curtain coating device is installed on the transverse guide rail of the moving bracket. The curtain coating device includes a liquid outlet nozzle lifting mechanism and a liquid outlet nozzle. The liquid outlet nozzle is installed on the liquid outlet nozzle lifting mechanism. A liquid outlet is provided at the bottom of the liquid outlet nozzle. The first container is provided with a feed inlet, and a liquid outlet is provided at the bottom of the first container. The second container is provided with a feed inlet, and a liquid outlet is provided at the bottom of the second container.

[0027] Further, a first liquid extraction pump is provided at the liquid outlet at the bottom of the first container, and the liquid outlet of the first container is connected to the inlet of the first liquid extraction pump. A second liquid extraction pump is provided at the liquid outlet at the bottom of the second container, and the liquid outlet of the second container is connected to the inlet of the second liquid extraction pump.

[0028] Further, a stirrer is provided in the liquid outlet nozzle of the curtain coating device. Two liquid inlet ports are provided on the liquid outlet nozzle. The two liquid inlet ports on the liquid outlet nozzle are respectively communicated with the outlet of the first liquid extraction pump and the outlet of the second liquid extraction pump.

[0029] Further, the curtain coating device for the surface of a wooden board main body further includes an air extraction system, and the air extraction system includes an air extraction port. An exhaust port is provided on the first container, and the exhaust port is communicated with the air extraction port of the air extraction system.

[0030] Further, the curtain coating device for the surface of a wooden board main body further includes a curtain coating liquid combing device. The curtain coating liquid combing device is installed on the transverse guide rail of the moving bracket. The curtain coating liquid combing device includes a combing plate lifting mechanism and a combing plate. The combing plate is installed on the combing plate lifting mechanism.

[0031] Compared with the existing coating processes applied to piano outer shell boards and similar boards, the present invention has the characteristics of simple process, high production efficiency, easy quality control, and meeting environmental protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of Step 1 of Embodiment 1 and Embodiment 2 of the present invention.

[0033] Figure 2 It is a schematic diagram of Step 2 of Embodiment 1 and Embodiment 2 of the present invention.

[0034] Figure 3 Schematic diagram of Step 3 of Embodiment 1 of the present invention.

[0035] Figure 4 Schematic diagram of Step 4 of Embodiment 1 of the present invention.

[0036] Figure 5 Schematic diagram of Step 5 of Embodiment 1 of the present invention.

[0037] Figure 6 Schematic diagram of the moving trajectory of the liquid outlet nozzle when the coating device of Embodiment 1 of the present invention performs coating on the lower annular edge sealing groove on the bottom surface of the wooden board and in the closed area surrounded by the demolding strips.

[0038] Figure 7 Schematic diagram of Step 3 of Embodiment 2 of the present invention.

[0039] Figure 8 Schematic diagram of Step 4 of Embodiment 2 of the present invention.

[0040] Figure 9 Schematic diagram of Step 5 of Embodiment 2 of the present invention.

[0041] Figure 10 Schematic diagram of the structure of a coating device for the surface of the main body of a wooden board according to the present invention.

[0042] In Attachment Figure 1 to Attachment Figure 10 : 1 represents a wooden board; 1a represents the bottom surface of the wooden board; 1a1 represents the lower annular edge sealing groove; 1a2 represents the lower demolding strip positioning groove; 1b represents the top surface of the wooden board; 1b1 represents the upper annular edge sealing groove; 1b2 represents the upper demolding strip positioning groove; 1c represents the annular path; 1d represents the serpentine path; 2 represents the coating; 2a represents the lower coating; 2b represents the upper coating; 3 represents the rectangular demolding strip; 3a represents the first lug; 4 represents the arc-shaped demolding strip; 4a represents the second lug; 5 represents the bed body; 5a represents the longitudinal guide rail; 6 represents the coating table; 7 represents the moving bracket; 7a represents the transverse guide rail; 8 represents the coating device; 8a represents the liquid outlet nozzle lifting mechanism; 8b represents the liquid outlet nozzle; 9 represents the coating liquid combing device; 9a represents the combing plate lifting mechanism; 9b represents the combing plate; 10 represents the first container; 11 represents the second container; 12 represents the electrical cabinet. Detailed Embodiment

[0043] The present invention will be further described in detail below with reference to the embodiments given in the accompanying drawings:

[0044] Embodiment 1

[0045] Referring to Attachment Figure 1 to Attachment Figure 6 , a coating process for the surface of the main body of a wooden board, the coating process for the surface of the main body of the wooden board includes the following steps:

[0046] Step 1: Take the prepared plate 1 to be processed. On the bottom surface 1a of the wooden plate 1 to be processed, a lower annular edge-sealing groove 1a1 with an inverted L-shaped cross-section is opened along the contour line of the set shape of the wooden plate product; outside the lower annular edge-sealing groove 1a1 on the bottom surface 1a of the wooden plate to be processed, a lower demolding strip positioning groove 1a2 for fixing the demolding strip is opened.

[0047] Step 2: Use the demolding strip to enclose a disk-shaped closed area along the outside of the lower annular edge-sealing groove 1a1 on the bottom surface 1a of the wooden plate to be processed. Through the liquid outlet nozzle 8b on the coating device 8 in the coating equipment, the coating liquid is coated in the lower annular edge-sealing groove 1a1 on the bottom surface 1a of the wooden plate 1 to be processed and in the disk-shaped closed area on the bottom surface 1a surrounded by the demolding strip. After the coating liquid is cured, a lower coating 2a with a relatively thick film thickness, high hardness and a polished mirror surface can be formed.

[0048] Step 3: On the top surface 1b of the wooden plate 1, an upper annular edge-sealing groove 1b1 is opened at a position coinciding with the lower annular edge-sealing groove 1a1 on the bottom surface 1a of the wooden plate 1. Outside the upper annular edge-sealing groove 1b1 on the top surface 1b of the wooden plate to be processed, an upper demolding strip positioning groove 1b2 for fixing the demolding strip is opened.

[0049] Step 4: Use the demolding strip to enclose a disk-shaped closed area along the outside of the upper annular edge-sealing groove 1b1 on the top surface 1b of the wooden plate to be processed. Through the liquid outlet nozzle 8b on the coating device 8 in the coating equipment, the coating liquid is coated in the upper annular edge-sealing groove 1b1 on the top surface 1b of the wooden plate 1 to be processed and in the disk-shaped closed area on the top surface 1b surrounded by the demolding strip. After the coating liquid is cured, an upper coating 2b with a relatively thick film thickness, high hardness and a polished mirror surface is formed. The upper coating 2b and the lower coating 2a are integrated into a coating 2 with a relatively thick film thickness, high hardness and a polished mirror surface on the overall surface of the wooden plate.

[0050] Step 5: Process it according to the set shape of the plate, and after processing, a plate product with a coating 2 with high hardness and a thick paint film on the overall surface of the wooden plate is obtained.

[0051] In the above Step 1, the plate 1 to be processed can be a density board, a multi-layer solid wood board or a particle board.

[0052] In the second step, the demolding strip is a rectangular demolding strip 3 made of plastic. The rectangular demolding strip 3 is fixed on the lower demolding strip positioning groove 1a2 on the bottom surface 1a of the wood-based panel to be processed through the first tongue 3a at its bottom; the coating solution includes a high-solid content coating and a curing agent. The components of the high-solid content coating in the coating solution include unsaturated resin paint, accelerator, and pigment paste. The unsaturated resin paint used is 196 resin; the mass ratio of the components of the high-solid content coating is: 100 parts of unsaturated resin paint, 1 - 4 parts of accelerator, and 3 - 6 parts of pigment paste; the curing agent in the coating solution is initiator L solution; the mass ratio of the high-solid content coating to the curing agent in the coating solution is 100:2 - 5.

[0053] In the third step, the upper annular edge-sealing groove 1b1 communicates with the lower annular edge-sealing groove 1a1. The depth dimension of the upper annular edge-sealing groove 1b1 is greater than the dimension obtained by subtracting the depth of the lower annular edge-sealing groove 1a1 on the bottom surface 1a of the wood-based panel from the thickness of the wood-based panel 1, which is expressed by the formula: H 2> H—H1, where: H is the thickness of the wood-based panel 1, H1 is the depth of the lower annular edge-sealing groove 1a1, and H2 is the depth of the upper annular edge-sealing groove 1b1.

[0054] In the fourth step, the demolding strip is a rectangular demolding strip 3 made of plastic. The rectangular demolding strip 3 is fixed on the upper demolding strip positioning groove 1b2 on the top surface 1b of the wood-based panel to be processed through the first tongue 3a at its bottom.

[0055] In the second step and the fourth step, when the liquid outlet nozzle 8b on the coating device 8 of the coating equipment coats the inside of the lower annular edge-sealing groove 1a1 and the upper annular edge-sealing groove 1b1 on the wood-based panel 1 to be processed, the movement of the liquid outlet nozzle 8b is along the circular line trajectory formed by the center line of the annular edge-sealing groove; when the liquid outlet nozzle 8b on the coating device 8 of the coating equipment coats the bottom surface 1a and the top surface 1b of the wood-based panel 1 to be processed, the movement of the liquid outlet nozzle 8b is along a serpentine line trajectory.

[0056] In the coating process on the surface of the main body of a wood-based panel in the present invention, the working temperature during coating is controlled at 20°C - 35°C.

[0057] The side surface of the board product obtained in Example 1 is a vertical surface.

[0058] Example 2

[0059] Refer to Appendix Figure 1 to Appendix Figure 2 and Appendix Figure 7 to Appendix Figure 9 A coating process for the surface of the main body of a wood-based panel, the coating process for the surface of the main body of the wood-based panel includes the following steps:

[0060] Step 1: Take the prepared wood board 1 to be processed. On the bottom surface 1a of the wood board 1 to be processed, a lower annular edge-sealing groove 1a1 with an inverted L-shaped cross-section is opened along the contour line of the set shape of the wood board product; a lower demoulding strip positioning groove 1a2 for fixing the demoulding strip is opened outside the lower annular edge-sealing groove 1a1 on the bottom surface 1a of the wood board to be processed.

[0061] Step 2: Use the demoulding strip to enclose a disk-shaped closed area along the outside of the lower annular edge-sealing groove 1a1 on the bottom surface 1a of the wood board to be processed. The coating liquid is sprayed into the lower annular edge-sealing groove 1a1 on the bottom surface 1a of the wood board to be processed and the disk-shaped closed area surrounded by the demoulding strip on the bottom surface 1a through the liquid outlet nozzle 8b on the spraying device 8 in the spraying equipment. After the coating liquid is cured, a lower coating 2a with a relatively thick film thickness, high hardness and a polished mirror surface can be formed.

[0062] Step 3: On the top surface 1b of the wood board 1, an upper annular edge-sealing groove 1b1 is opened at a position coinciding with the lower annular edge-sealing groove 1a1 on the bottom surface 1a of the wood board 1. An upper demoulding strip positioning groove 1b2 for fixing the demoulding strip is opened outside the upper annular edge-sealing groove 1b1 on the top surface 1b of the wood board to be processed.

[0063] Step 4: Use the demoulding strip to enclose a disk-shaped closed area along the outside of the upper annular edge-sealing groove 1b1 on the top surface 1b of the wood board to be processed. The coating liquid is sprayed into the upper annular edge-sealing groove 1b1 on the top surface 1b of the wood board to be processed and the disk-shaped closed area surrounded by the demoulding strip on the top surface 1b through the liquid outlet nozzle 8b on the spraying device 8 in the spraying equipment. After the coating liquid is cured, an upper coating 2b with a relatively thick film thickness, high hardness and a polished mirror surface is formed. The upper coating 2b and the lower coating 2a are integrated to form a coating 2 with a relatively thick film thickness, high hardness and a polished mirror surface on the overall surface of the wood board.

[0064] Step 5: Process the wood board according to the set shape of the board. After processing, a wood board product with a coating 2 with high hardness and a thick paint film on the overall surface of the wood board is obtained.

[0065] In the said Step 3, the cross-section of the upper annular edge-sealing groove 1b1 is an inverted isosceles right triangle. Among them, the length of one right side of the isosceles right triangle is the depth of the upper annular edge-sealing groove 1b1. It is communicated with the lower annular edge-sealing groove 1a1. The length dimension of the right side of the isosceles right triangle is greater than the dimension of the thickness of the wood board 1 minus the depth of the lower annular edge-sealing groove 1a1 on the bottom surface 1a of the wood board. It is expressed by the formula: H 2>H - H1, where: H is the thickness of the wood-based board 1, H1 is the depth of the lower annular edge-sealing groove 1a1, and H2 is the length of the right-angled side of the isosceles right triangle; the length of the other right-angled side of the isosceles right triangle is the width of the upper annular edge-sealing groove 1b1.

[0066] In the fourth step, the demolding strip is an arc-shaped demolding strip 4 made of plastic. The arc-shaped demolding strip 4 is fixed on the upper demolding strip positioning groove 1b2 on the top surface 1b of the wood-based board to be processed through the second convex tongue 4a at its bottom.

[0067] The rest is the same as in Embodiment 1.

[0068] The side surface of the board product obtained in Embodiment 2 is a convex arc surface.

[0069] Embodiment 3

[0070] Refer to the appendix Figure 10 A pouring equipment for the surface of the wood-based board body, which includes a bed body 5, a pouring tabletop 6, a moving bracket 7, a pouring device 8, a pouring liquid combing device 9, a container 10, a container 11, and an electrical cabinet 12. The pouring tabletop 6 is arranged on the top surface of the bed body 5. Longitudinal guide rails 5a are arranged on both sides of the bed body 5. The moving bracket 7 is installed on the longitudinal guide rails 5a on the bed body 5. A transverse guide rail 7a is arranged on the moving bracket 7. The pouring device 8 and the pouring liquid combing device 9 are installed on the transverse guide rail 7a of the moving bracket 7, where:

[0071] The container 10 is provided with a feed inlet and an exhaust port. A liquid outlet is arranged at the bottom of the container 10. A liquid extraction pump 1 is arranged at the liquid outlet at the bottom of the container 10. The liquid outlet of the container 10 is connected to the inlet of the liquid extraction pump 1;

[0072] The container 11 is provided with a feed inlet. A liquid outlet is arranged at the bottom of the container 11. A liquid extraction pump 2 is arranged at the liquid outlet at the bottom of the container 11. The liquid outlet of the container 11 is connected to the inlet of the liquid extraction pump 2;

[0073] The pouring device 8 includes a liquid outlet nozzle lifting mechanism 8a and a liquid outlet nozzle 8b. The liquid outlet nozzle 8b is installed on the liquid outlet nozzle lifting mechanism 8a. A liquid outlet is arranged at the bottom of the liquid outlet nozzle 8b. A stirrer is arranged inside the liquid outlet nozzle 8b. Two liquid inlet ports are arranged on the liquid outlet nozzle 8b. The two liquid inlet ports on the liquid outlet nozzle 8b are respectively communicated with the outlets of the liquid extraction pump 1 and the liquid extraction pump 2;

[0074] The pouring liquid combing device 9 includes a combing plate lifting mechanism 9a and a combing plate 9b. The combing plate 9b is installed on the combing plate lifting mechanism 9a;

[0075] The described flow coating device for the surface of the wooden board main body further includes an air extraction system, and the air extraction system includes an air extraction port, and the air extraction port of the air extraction system is communicated with the exhaust port on the container 10.

[0076] Due to the adoption of the above-mentioned flow coating process for the surface of the wooden board main body and a flow coating device for the surface of the wooden board main body, the present invention can produce wooden board products with a high hardness and a thick paint film coating, and the wooden board products are particularly suitable for application to piano outer shell boards and similar boards.

[0077] The above are only the preferred embodiments of the present invention, but the scope of implementation of the present invention cannot be limited thereby. That is, all simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the invention description still fall within the scope covered by the patent of the present invention.

Claims

1. A pouring coating process for the surface of a wood-based panel body, characterized in that Set the required shape of the wood board on the surface of the wood board to be processed. Cut a lower annular edge-sealing groove along the contour line of the set shape of the wood board product on the bottom surface of the wood board to be processed. A demolding strip is provided outside the lower annular edge-sealing groove on the bottom surface of the wood board to be processed. The demolding strip surrounds a disk-shaped closed area along the outside of the lower annular edge-sealing groove. The coating liquid is sprayed into the lower annular edge-sealing groove on the bottom surface of the wood board to be processed and the disk-shaped closed area surrounded by the demolding strip on the bottom surface through the liquid outlet nozzle on the spraying device in the spraying equipment. After the coating liquid is cured, an upper annular edge-sealing groove is cut at the position on the top surface of the wood board that coincides with the lower annular edge-sealing groove on the bottom surface of the wood board. The upper annular edge-sealing groove communicates with the lower annular edge-sealing groove. The depth dimension of the upper annular edge-sealing groove is greater than the dimension obtained by subtracting the depth of the lower annular edge-sealing groove on the bottom surface of the wood board from the thickness of the wood board, which is expressed by the formula: H 2> H—H1, where: H is the thickness of the wood board, H1 is the depth of the lower annular edge-sealing groove, and H2 is the depth of the upper annular edge-sealing groove; A demolding strip is provided outside the upper annular edge-sealing groove on the top surface of the wood board to be processed. The demolding strip surrounds a disk-shaped closed area along the outside of the upper annular edge-sealing groove. The coating liquid is sprayed into the upper annular edge-sealing groove on the top surface of the wood board to be processed and the disk-shaped closed area surrounded by the demolding strip on the top surface through the liquid outlet nozzle on the spraying device in the spraying equipment. After the coating liquid is cured, it is processed according to the set shape of the board. After processing, a wood board product with a high-hardness and thick paint film coating is obtained. Among them, the coating liquid includes a high-solid-content coating and a curing agent. The components of the high-solid-content coating include unsaturated resin paint, accelerator, and pigment paste.

2. The dip coating process for the surface of the main body of a wood-based panel according to claim 1, characterized in that A lower demolding strip positioning groove for fixing a demolding strip is provided outside the lower annular edge sealing groove on the bottom surface of the to-be-processed wood board, and an upper demolding strip positioning groove for fixing a demolding strip is provided outside the upper annular edge sealing groove on the top surface of the to-be-processed wood board.

3. The dip coating process for the surface of the main body of a wood-based panel according to claim 1, characterized in that The demolding strip is a rectangular demolding strip with a rectangular head structure, and a first lug is provided at the bottom of the rectangular demolding strip.

4. A pouring process on the surface of the main body of a wood-based panel according to claim 1, characterized in that The cross-section of the upper annular edge sealing groove is in an inverted L shape.

5. The dip coating process on the surface of the main body of the wood-based panel according to claim 1, characterized in that The demolding strip is an arc-shaped demolding strip with an arc-shaped head structure, and a second lug is provided at the bottom of the arc-shaped demolding strip.

6. The dip coating process on the surface of the main body of the wood-based panel according to claim 1, characterized in that The cross-section of the upper annular edge sealing groove is in an inverted right-angled triangle shape.

7. A pouring coating process for the surface of a wood-based panel main body according to claim 1, characterized in that When the liquid outlet nozzle on the coating device in the coating equipment coats the inside of the lower annular edge sealing groove and the upper annular edge sealing groove on the to-be-processed wood board, the movement of the liquid outlet nozzle is along the circular line trajectory formed by the center line of the annular edge sealing groove.

8. A pouring process on the surface of the main body of a wood-based panel according to claim 1, characterized in that When the liquid outlet nozzle on the coating device in the coating equipment coats the bottom surface and the top surface of the to-be-processed wood board, the movement of the liquid outlet nozzle is along a serpentine line trajectory.

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