Multi-layer composite artificial board and preparation method therefor

Abstract

A multi-layer composite artificial board, comprising a base particleboard (1), a lower adhesive layer (2), a multi-layer board (3), an upper adhesive layer (4) and a top particleboard (5), which are arranged in sequence from bottom to top. The surface wood effect provided by the bottom particleboard and the top particleboard is adequately stable, and the multi-layer board provides the structural strength and support strength. Further disclosed is a preparation method for an artificial board. Bottom prefabricated holes (6), top prefabricated holes (7), post-formed openings (8) and four-claw nuts (9) are effectively provided, thus enhancing the mounting stability of the four-claw nuts on an artificial board body.

Description

A multi-layer composite artificial board and a method for manufacturing the same TECHNICAL FIELD

[0001] The present application belongs to the technical field of artificial boards, and particularly relates to a multi-layer composite artificial board and a method for manufacturing the same. BACKGROUND

[0002] Common artificial boards are generally multi-layer structures connected by glue between layers. The "layer" can be, for example, a density board, a particle board, a multi-layer board, a solid wood board, and a veneer board. The density board, the particle board, and the multi-layer board themselves also use various glues in production.

[0003] On the other hand, the particle board has the outstanding advantage of exposing the particle details and having strong wood feeling, but its structural strength is generally low. The multi-layer board has the main advantage of high structural strength, which can provide sufficient support strength. The structural strength of the density board is between that of the particle board and the multi-layer board. The solid wood board and the veneer board are raw wood materials without using glue. The main disadvantage of the former is high price, and the main disadvantages of the latter are relatively high maintenance cost and difficulty.

[0004] For example, the Chinese utility model patent with the publication number CN213682545U and the publication date of July 13, 2021 discloses a multi-layer board, which includes a density board layer, a first connecting glue layer connected to the top of the density board layer, a particle board layer provided on the top of the first connecting glue layer, a second connecting glue layer connected to the top of the particle board layer, an eucalyptus board layer provided on the top of the second connecting glue layer, and a solid wood veneer layer fixed to the top of the eucalyptus board layer.

[0005] The multi-layer board of the utility model patent has the general advantage that the solid wood veneer layer has natural and real wood texture and hand feeling.

[0006] However, the multi-layer board has at least the following two deficiencies in actual use, which are also the technical problems to be solved by the present application, namely:

[0007] First, the thickness of the common solid wood veneer layer is generally about 0.4 mm, so it is easy to break and fall off.

[0008] Second, the structural strength of the multi-layer board is mainly provided by the density board, the particle board, and the eucalyptus board. The structural strength of the eucalyptus board is lower than that of the multi-layer board, and the price of the eucalyptus board is higher. The structural strength of the first two is even lower than that of the multi-layer board.

[0009] Therefore, it is urgent to provide a multi-layer composite artificial board with exposed wood effect and stability, and relatively large overall structural strength for use in furniture, building and other fields. SUMMARY

[0010] The present application provides a multi-layer composite artificial board, which comprises a shaving bottom plate, a lower glue layer, a multi-layer board, an upper glue layer and a shaving top plate arranged in sequence from bottom to top.

[0011] In addition, the present application also provides a preparation method of the above-mentioned artificial board, and further provides effective setting of a bottom preformed hole, a top preformed hole, a post-formed opening and a four-jaw nut.

[0012] The present application solves the above-mentioned problems by adopting the technical scheme of a multi-layer composite artificial board, which comprises a shaving bottom plate, a lower glue layer, a multi-layer board, an upper glue layer and a shaving top plate arranged in sequence from bottom to top.

[0013] Further preferred technical scheme is that the thickness of the artificial board is 12.0-14.0 mm, and the thickness of the shaving top plate is greater than that of the shaving bottom plate.

[0014] Further preferred technical scheme is that the shaving bottom plate is further provided with a bottom preformed hole, the shaving top plate is further provided with a top preformed hole, the multi-layer board is further provided with a post-formed opening, and the top preformed hole is provided with a four-jaw nut for inserting the post-formed opening and the bottom preformed hole.

[0015] Further preferred technical scheme is that the diameter of the bottom preformed hole is equal to that of the post-formed opening, and smaller than that of the top preformed hole, and the positioning claws of the four-jaw nut are arranged on the shaving top plate.

[0016] Further preferred technical scheme is that the upper surface of the shaving top plate is further provided with a top coating layer, and the lower surface of the shaving bottom plate is further provided with a bottom coating layer.

[0017] Further preferred technical scheme is that a coating resin block is arranged between the top preformed hole and the four-jaw nut, and is used for connecting the top coating layer and reinforcing the four-jaw nut.

[0018] Further preferred technical scheme is that the thickness of the top coating layer and the bottom coating layer is ≤1.0 mm, and the distance between the upper surface of the top coating layer and the upper end surface of the four-jaw nut is ≤0.2 mm.

[0019] A preparation method of a multi-layer composite artificial board, which comprises the following steps in sequence:

[0020] S1, opening the bottom prefabricated hole on the shaving bottom plate and the top prefabricated hole on the shaving top plate;

[0021] S2, coating glue on both surfaces of the multi-layer plate, then pressing the shaving bottom plate and the shaving top plate respectively, and finally curing to form the lower and upper glue layers;

[0022] S3, inserting and then opening the drill bit in the top prefabricated hole until the drill bit penetrates the lower glue layer, and finally forming the post-formed opening hole;

[0023] S4, inserting and installing the four-jaw nut in the top prefabricated hole until the positioning claw of the four-jaw nut is inserted into the shaving top plate.

[0024] Further preferred technical solutions comprise the following steps in sequence after S4:

[0025] S5, spraying transparent resin on the upper surface of the shaving top plate and the lower surface of the shaving bottom plate, and finally forming the top and bottom resin layers.

[0026] In S3, the signal that the drill bit penetrates the lower glue layer is that the reaction force acting on the drill bit suddenly decreases, at which time the annular edge at the lower end of the annular surface of the drill bit coincides with the upper annular edge of the bottom prefabricated hole. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 is a structural schematic diagram of the present application.

[0028] Fig. 2 is a schematic diagram of the appearance characteristics of the shaving bottom plate in the present application.

[0029] Fig. 3 is a schematic diagram of the layered structure of the multi-layer plate in the present application.

[0030] Fig. 4 is a schematic diagram of one distribution mode of the four-jaw nut in the present application.

[0031] Fig. 5 is a schematic diagram of two use modes of the connecting bolt in the present application.

[0032] Fig. 6 is a schematic diagram of the position of the four-jaw nut in the present application.

[0033] Fig. 7 is a schematic diagram of the forming state of the lower and upper glue layers in the present application.

[0034] Fig. 8 is a schematic diagram of the insertion and use mode of the drill bit in the present application.

[0035] Fig. 9 is a schematic diagram of the end position of the drill bit insertion action in the present application.

[0036] Figure 10 is a schematic diagram of the installation of the four-jaw nut in the present application,

[0037] Figure 11 is a schematic diagram of the position of the top and bottom film layers in the present application.

[0038] Figure 12 is a schematic diagram of the position and shape of the film resin block in the present application.

[0039] Figure 13 is a schematic diagram of the first shape of the bottom film layer in the present application.

[0040] Figure 14 is a schematic diagram of the second shape of the bottom film layer in the present application,

[0041] In the figures, the meanings of the respective marks are as follows:

[0042] Drill bit a, bolt b, hardware c, furniture frame plate d;

[0043] Shaving bottom plate 1, lower glue layer 2, multi-layer plate 3, upper glue layer 4, shaving top plate 5, bottom preformed hole 6, top preformed hole 7, post-formed opening 8, four-jaw nut 9, top film layer 10, bottom film layer 11, film resin block 12;

[0044] Annular surface lower end annular edge a-1, upper end annular edge 6-1, shaving 1-1. DETAILED DESCRIPTION

[0045] The following description is only of the preferred embodiments of the present application and is not intended to limit the scope of the present application.

[0046] As shown in Figures 1-14, a multi-layer composite artificial board has a structure including, from bottom to top, a shaving bottom plate 1, a lower glue layer 2, a multi-layer plate 3, an upper glue layer 4, and a shaving top plate 5.

[0047] In the present embodiment, the shaving bottom plate 1 and the shaving top plate 5 are both conventional shaving board products, such as wood shaving board, bamboo shaving board, etc. The materials of the lower glue layer 2 and the upper glue layer 4 can be selected from, for example, the following range: tri-aldehyde glue, MDI glue, soybean glue, and AB glue.

[0048] In addition, the multi-layer plate 3 is a multi-layer solid wood plate formed by 3 or more layers of veneer through a glue bonding and heating pressing step. The shaving board and the multi-layer plate 3 can be commercially available products.

[0049] Thus, the artificial board can achieve sufficient structural strength and support strength through the multi-layer plate 3, and can obtain a relatively beautiful and natural wood feeling through the shaving boards on both sides.

[0050] The thickness of the shaving bottom plate 1 and the shaving top plate 5 is much greater than the thickness of the common veneer layer, and specifically, the thickness of the shaving plate is at least 2.0 mm, while the thickness of the common veneer layer is at most 0.5 mm. Therefore, the shaving bottom plate 1 and the shaving top plate 5 have relatively high glue bonding stability and structural strength, and the shaving plate is not easy to fall off or break.

[0051] The thickness of the artificial board is 12.0-14.0 mm, and the thickness of the shaving top plate 5 is greater than the thickness of the shaving bottom plate 1.

[0052] In the embodiment, when the thickness of the artificial board is 12.0 mm, the thickness of the shaving bottom plate 1, the lower glue layer 2, the multi-layer plate 3, the upper glue layer 4 and the shaving top plate 5 is 2 mm, 1 mm, 5 mm, 1 mm and 3 mm, respectively. When the thickness of the artificial board is 14.0 mm, the above-mentioned dimensions are 3 mm, 1 mm, 5 mm, 1 mm and 4 mm, respectively.

[0053] The reason why the thickness of the shaving top plate 5 is greater than the thickness of the shaving bottom plate 1 is as follows.

[0054] When the artificial board is vertically installed, the shaving top plate 5 faces outward and faces the user, and when the artificial board is horizontally installed, the shaving top plate 5 faces upward and is further connected to other structures, such as the cushion of a sofa. Therefore, compared with the shaving bottom plate 1, the wood feeling and the installation of hardware are generally displayed on the shaving top plate 5, so the shaving top plate 5 needs greater structural strength, i.e., a relatively greater thickness.

[0055] The shaving bottom plate 1 is further provided with a bottom prefabricated hole 6, the shaving top plate 5 is further provided with a top prefabricated hole 7, the multi-layer plate 3 is further provided with a post-formed opening hole 8, and the top prefabricated hole 7 is provided with a four-jaw nut 9 for inserting the post-formed opening hole 8 and the bottom prefabricated hole 6.

[0056] In the embodiment, the bottom prefabricated hole 6 and the top prefabricated hole 7 are first prefabricated and excavated, then the lower glue layer 2 and the upper glue layer 4 are coated and cured, and finally the post-formed opening hole 8 is excavated. The reasons for this forming method are as follows:

[0057] First, if the lower glue layer 2 and the upper glue layer 4 are solidified first, and the above three openings are formed by one-time excavation, the problem is that the density and hardness performance of the particle board and the multi-layer board 3 are quite different, and the punching operation needs to cope with the material change phenomenon from the particle top plate 5 to the multi-layer board 3, and then from the multi-layer board 3 to the particle bottom plate 1, that is, the material changes twice from top to bottom, which makes it relatively difficult to achieve accurate punching effect, and the one-time formed through hole is prone to various harmful problems such as inclination, burr, misalignment, etc., which is not conducive to the structural stability of the artificial board itself and the stability of the subsequent installation of hardware at the through hole.

[0058] Second, if the bottom preformed hole 6, the top preformed hole 7 and the post-formed opening 8 are all preformed respectively, then when the lower glue layer 2 and the upper glue layer 4 are coated and solidified, a large amount of glue will enter the post-formed opening 8, which will block the post-formed opening 8 and block the subsequent installation of the bolt, which is very inconvenient.

[0059] In summary, the bottom preformed hole 6 and the top preformed hole 7 are preformed, and the post-formed opening 8 is formed after the lower glue layer 2 and the upper glue layer 4 are solidified, which is more conducive to the production and use of the artificial board.

[0060] The diameter of the bottom preformed hole 6 is equal to the diameter of the post-formed opening 8, and smaller than the diameter of the top preformed hole 7, and the positioning claw of the four-jaw nut 9 is arranged on the particle top plate 5.

[0061] In this embodiment, for example, the diameters of the bottom preformed hole 6 and the post-formed opening 8 are 6mm, and the diameter of the top preformed hole 7 is 8mm. The reason for the size difference is mainly as follows:

[0062] First, when the post-formed opening 8 is excavated, the end point of the drill bit a is the bottom preformed hole 6, so the rod part of the drill bit a will not enter the bottom preformed hole 6, and the rod part will not cause harmful phenomena such as reaming and scratching in the bottom preformed hole 6, so the diameter of the bottom preformed hole 6 does not need to be larger than that of the post-formed opening 8.

[0063] Second, when the post-formed opening 8 is excavated, the rod part of the drill bit a is always located in the top preformed hole 7. If the diameters of the top preformed hole 7 and the post-formed opening 8 being formed are the same, the drill bit a itself cannot completely avoid the phenomenon of swinging, which is easy to scratch and collide on the top preformed hole 7, which is very disadvantageous for the particle top plate 5 with relatively low structural strength, and is easy to cause cracks in the particle top plate 5 from the top preformed hole 7.

[0064] Correspondingly, when the bottom preformed hole 6 and the top preformed hole 7 are respectively formed on the shaving bottom plate 1 and the shaving top plate 5, special attention should be paid and high-quality drill bits with relatively short length and relatively large rigidity should be selected.

[0065] On the other hand, the common four-jaw nut 9 in the prior art is composed of a nut body and a positioning claw arranged on the shaving top plate 5, so that the four-jaw nut 9 can be stably installed, which is one of the reasons why the thickness of the shaving top plate 5 needs to be relatively large, greater than that of the shaving bottom plate 1.

[0066] In this embodiment, the center axes of the bottom preformed hole 6, the top preformed hole 7 and the rear-formed opening 8 coincide, the four-jaw nut 9 passes through the top preformed hole 7, the rear-formed opening 8 and the bottom preformed hole 6 in sequence when being installed, and the nut body of the four-jaw nut 9 does not protrude outside the bottom preformed hole 6, so that the artificial board can be fully attached to the above-mentioned furniture frame plate d.

[0067] Finally, the four-jaw nut 9 can also be relatively short, and the nut body thereof can not enter the bottom preformed hole 6, as long as the four-jaw nut 9 can be stably screwed with the corresponding bolt.

[0068] The upper surface of the shaving top plate 5 is further provided with a top coating layer 10, and the lower surface of the shaving bottom plate 1 is further provided with a bottom coating layer 11.

[0069] In this embodiment, the materials of the top coating layer 10 and the bottom coating layer 11 can be selected from, for example, the following ranges: polylactic acid, sarin resin, polymethyl methacrylate, and polycarbonate.

[0070] The common characteristics of the above-mentioned types of resins are:

[0071] First, the material is transparent, which can not only protect the shaving plate but also reveal the wooden feeling of the shaving structure;

[0072] Second, it is suitable for coating forming process.

[0073] The top preformed hole 7 and the four-jaw nut 9 are further provided with a coating resin block 12 connected to the top coating layer 10 and used for reinforcing the four-jaw nut 9.

[0074] In this embodiment, the size relationship that the hole diameter of the top preformed hole 7 is greater than that of the rear-formed opening 8 forms an annular gap between the top preformed hole 7 and the outer ring surface of the nut body of the four-jaw nut 9.

[0075] At this time, the gap is cast into the corresponding resin material of the top film layer 10, so that the film resin block 12 can bond and reinforce the four-jaw nut 9, further strengthening the installation stability of the four-jaw nut 9 on the body of the artificial board,

[0076] It should be noted that most of the existing common multi-layer boards 3 have high nail holding force, which can stably clamp the four-jaw nut 9, and the nail holding force performance of various types of particle boards is uneven.

[0077] Therefore, due to the use of the film resin block 12, the particle top plate 5 can be selected, for example, a variety of particle boards with relatively poor nail holding force but other performance more outstanding, which can greatly widen its application range, which is very practical.

[0078] Generally, the outer diameter of the nut body of the four-jaw nut 9 is larger than the hole diameter of the post-formed hole 8 by 0.1 mm or less, thereby achieving a sufficient and appropriate interference fit and stable insertion effect.

[0079] The thickness of the top film layer 10 and the bottom film layer 11 is ≤1.0 mm; the distance between the upper surface of the top film layer 10 and the upper end surface of the four-jaw nut 9 is ≤0.2 mm.

[0080] In this embodiment, when the top film layer 10 is formed by film forming, a small amount of resin material will enter the four-jaw nut 9 or form a sealing film on the four-jaw nut 9.

[0081] Similarly, when the bottom film layer 11 is formed by film forming, a small amount of resin material will also enter the four-jaw nut 9 or enter the bottom preformed hole 6 without reaching the four-jaw nut 9.

[0082] Therefore, in either case, the bolt adapted to the four-jaw nut 9 needs to penetrate the unexpected gathering and accumulation of the above-mentioned resin, and the above-mentioned bolt can be selected to be of the type with a sharp tip. The specific case can be referred to in Figures 12, 13 and 14.

[0083] A method for preparing a multi-layer composite artificial board, comprising the following steps in sequence:

[0084] S1, forming the bottom preformed hole 6 on the particle bottom plate 1 and the top preformed hole 7 on the particle top plate 5;

[0085] S2, first coating glue on both surfaces of the multi-layer board 3, then pressing the particle bottom plate 1 and the particle top plate 5 respectively, and finally curing to form the lower glue layer 2 and the upper glue layer 4;

[0086] S3, first insert the drill bit a in the top preformed hole 7, then open the drill bit a until the drill bit a penetrates the lower glue layer 2, and finally form the post-formed opening hole 8;

[0087] S4, insert and install the four-jaw nut 9 in the top preformed hole 7 until the positioning claws of the four-jaw nut 9 are inserted into the shaving top plate 5.

[0088] In S3 of the embodiment, the drill bit a penetrates the upper glue layer 4 and the lower glue layer 2 in sequence, and the two resin layers do not substantially and significantly affect the drilling operation of the drill bit a.

[0089] After S4, the following steps are included in sequence: S5, spray transparent spraying resin on the upper surface of the shaving top plate 5 and the lower surface of the shaving bottom plate 1 respectively, and finally form the top spraying layer 10 and the bottom spraying layer 11.

[0090] In S5 of the embodiment, the top spraying layer 10 needs to select a resin with relatively small viscosity, and provide sufficient flow time to ensure that the spraying resin block 12 is fully filled to form a complete tubular block.

[0091] In S3, the signal that the drill bit a penetrates the lower glue layer 2 is that the reaction force acting on the drill bit suddenly decreases, at which time the lower end annular edge of the annular surface of the drill bit a coincides with the upper end annular edge of the bottom preformed hole 6.

[0092] As shown in FIG. 9, this is the end point state of the excavation operation of the drill bit a. Since the thickness of the lower glue layer 2 is relatively small and the hardness is relatively small, the time required for drilling and excavation is negligible.

[0093] Therefore, after the rod of the drill bit a completely passes through the multi-layer plate 3, the drilling operation can be stopped. The latest stopping time point of the above drilling operation, that is, the lower end annular edge a-1 of the annular surface abuts against the annular edge 6-1, ensures that the shaving bottom plate 1 is not rubbed and impacted by the drill bit a.

[0094] The embodiments of the application are described in detail above with reference to the drawings, but the application is not limited to the above embodiments, and various modifications can be made within the knowledge of those skilled in the art without departing from the purpose of the application. These are not creative modifications, and are protected by the patent law within the scope of the claims of the application.

Claims

1. A multi-layered composite wood-based panel, characterized by: The structure comprises, from bottom to top, a shaving bottom plate (1), a lower glue layer (2), a multi-layer plate (3), an upper glue layer (4), and a shaving top plate (5).

2. A multi-layered composite wood-based panel according to claim 1, characterized in that: The thickness of the artificial board is 12.0-14.0 mm, and the thickness of the shaving top plate (5) is greater than that of the shaving bottom plate (1).

3. A multi-layered composite wood-based panel according to claim 1, characterized in that: The shaving bottom plate (1) is further provided with a bottom prefabricated hole (6), the shaving top plate (5) is further provided with a top prefabricated hole (7), the multi-layer plate (3) is further provided with a post-formed opening (8), and the top prefabricated hole (7) is provided with a four-jaw nut (9) inserted into the post-formed opening (8) and the bottom prefabricated hole (6).

4. A multi-layered composite wood-based panel according to claim 3, characterized in that: The diameter of the bottom prefabricated hole (6) is equal to that of the post-formed opening (8) and smaller than that of the top prefabricated hole (7), and the positioning claw of the four-jaw nut (9) is arranged on the shaving top plate (5).

5. A multi-layered composite wood-based panel according to claim 4, characterized in that: The upper surface of the shaving top plate (5) is further provided with a top coating layer (10), and the lower surface of the shaving bottom plate (1) is further provided with a bottom coating layer (11).

6. A multi-layered composite wood-based panel according to claim 5, characterized in that: The top prefabricated hole (7) and the four-jaw nut (9) are further provided with a coating resin block (12) connected to the top coating layer (10) and used for reinforcing the four-jaw nut (9).

7. A multi-layered composite wood-based panel according to claim 5, wherein: The thickness of the top coating layer (10) and the bottom coating layer (11) is ≤1.0 mm, and the distance between the upper surface of the top coating layer (10) and the upper end surface of the four-jaw nut (9) is ≤0.2 mm.

8. A method of manufacturing a multi-layered composite wood-based panel according to claim 5, wherein The steps are as follows: S1, the bottom prefabricated hole (6) is formed on the shaving bottom plate (1), and the top prefabricated hole (7) is formed on the shaving top plate (5); S2, first, glue is applied to both surfaces of the multi-layer plate (3), then the shaving bottom plate (1) and the shaving top plate (5) are pressed, and finally the lower glue layer (2) and the upper glue layer (4) are formed after curing; S3, the drill bit (a) is first inserted into the top prefabricated hole (7) and then turned on until the drill bit (a) penetrates the lower glue layer (2), and finally the post-formed opening (8) is formed; S4, the four-jaw nut (9) is inserted into the top prefabricated hole (7) until the positioning claw of the four-jaw nut (9) is inserted into the shaving top plate (5).

9. A method of manufacturing a multi-layered composite wood-based panel according to claim 8, characterized in that The steps after S4 are as follows: S5, transparent coating resin is sprayed on the upper surface of the shaving top plate (5) and the lower surface of the shaving bottom plate (1) respectively, and finally the top coating layer (10) and the bottom coating layer (11) are formed.

10. A method of manufacturing a multi-layered composite wood-based panel according to claim 8, characterized in that: In S3, the signal that the drill bit (a) penetrates the lower glue layer (2) is that the reaction force acting on the drill bit suddenly decreases, and at this time, the lower end annular edge of the annular surface of the drill bit (a) coincides with the upper end annular edge of the bottom prefabricated hole (6).

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