Bamboo-wood orthogonal composite door plate

Abstract

The utility model provides a bamboo-wood orthogonal composite door plate, relates to the field of door plate materials, and aims to solve the technical problems that a door plate is poor in gluing durability, easy to deform and crack and the like under the environment change. The bamboo-wood orthogonal composite door plate is formed by pressing an integrated bamboo panel, a core layer and an integrated bamboo back plate which are sequentially stacked and laid by applying a formaldehyde-free environment-friendly structural adhesive. A core layer of the door plate comprises two side stiles parallel to the fiber direction of the bamboo face (back) plate, an upper stile, a middle stile and a lower stile, and filling spaces are formed among the two side stiles, the middle stile and the lower stile. The filling material comprises common heat preservation and sound insulation materials or fireproof materials and can also be solid wood sawn timber, and the fiber direction of the filling material is perpendicular to the fiber direction of the integrated bamboo face (back) plate. The problems that an existing solid wood door sheet is poor in gluing durability, prone to deformation and cracking and the like are solved, the strength and quality of the door sheet are greatly improved due to the texture and attractiveness of the integrated bamboo surface, and integration of the door sheet structure and decoration can be helped to be achieved.

Description

Technical Field

[0001] The utility model relates to the field of door panel materials and decoration, and particularly to a bamboo-wood orthogonal composite door panel. Background Art

[0002] In the fields of architecture and home decoration, solid wood door panels are widely favored for their unique natural texture, excellent touch, and long durability. However, with the rapid development of technology and the increasing demands of consumers, the limitations of traditional solid wood door panels in terms of dimensional stability and gluing strength have gradually emerged, and there is an urgent need for a new type of material to meet the market's demand for high-performance door panels. As an emerging low-carbon and environmentally friendly material, integrated bamboo materials provide a new direction for the innovation of door panel materials with their unique texture beauty, excellent mechanical properties, and sustainability. The natural texture and color of bamboo can not only meet consumers' pursuit of aesthetics but also possess better stability and durability than traditional wood.

[0003] The prior art CN922178704 discloses a bamboo-wood composite high-strength door panel, which is made of scattered bamboo strips or bamboo curtains, waste materials, bamboo mats, wood veneers, and synthetic resin through a hot pressing process to form integrated bamboo materials and then made into a door panel. The four surrounding frames of the door panel are frames composed of scattered bamboo strips or bamboo curtains. The long sides in the frame can be wooden squares. There is a horizontal bamboo strip or bamboo curtain in the middle of the frame. The overlapping joints of the vertical and horizontal sides of the frame and the overlapping joints of the horizontal strip and the vertical sides of the frame are overlapped and glued to each other alternately. The two surface layers of the frame are sequentially provided with bamboo mats or bamboo curtains and wood veneers, and the core layer of the frame is waste materials. However, the contact surfaces of the two surface layers adjacent to the frame are only bonded by synthetic resin. When the fiber directions of the two surface layers and the frame are uncontrollable, this sandwich structure is prone to deformation under environmental changes, resulting in poor gluing durability and easy deformation and cracking. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is that the gluing durability of the door panel is poor and it is easy to deform and crack under environmental changes. To overcome the above defects of the prior art, the utility model provides a bamboo-wood orthogonal composite door panel.

[0005] The utility model provides a bamboo-wood orthogonal composite door panel, which comprises an integrated bamboo panel, a core layer, and an integrated bamboo back panel that are sequentially laminated. The fiber directions of the integrated bamboo panel and the integrated bamboo back panel are parallel. The core layer comprises two side stiles, an upper stile, a middle stile, and a lower stile. The two side stiles are arranged oppositely and are parallel to the fiber direction of the integrated bamboo panel. The upper stile, the middle stile, and the lower stile are perpendicular to the fiber direction of the integrated bamboo panel. A first filling cavity is formed among the upper stile, the middle stile, and the side stiles, and a second filling cavity is formed among the middle stile, the lower stile, and the side stiles.

[0006] Compared with the prior art, in the present utility model, the fiber directions of different layers are set to be orthogonal (i.e., perpendicular to each other). This design enables the door panel to have bidirectional strength and is not easily deformed. At the same time, bamboo materials are covered on the upper and lower surfaces, which not only eliminates the traditional veneering materials, but also significantly improves the structural stability and durability of the door panel through the orthogonal composite method. In addition, this structural design effectively avoids the problem that traditional solid wood door panels are prone to deformation under environmental changes, and improves the applicability and reliability of the product.

[0007] In a possible implementation manner, both the first filling cavity and the second filling cavity are filled with solid wood saw materials, and the fiber direction of the solid wood saw materials is perpendicular to the fiber direction of the integrated bamboo panel.

[0008] Compared with the prior art, the bamboo-wood orthogonal composite door panel filled with solid wood saw materials combines the advantages of bamboo and solid wood, has good surface flatness and dimensional stability, high bidirectional strength, and uses an environmentally friendly formaldehyde-free structural adhesive, and the gluing effect meets the use requirements of interior doors and even opening doors. It not only solves the problems of poor gluing durability, easy deformation and cracking of existing solid wood door panels, but also due to the unique texture and beauty of the integrated bamboo surface, it can help to realize the integration of the door panel structure and decoration, and can be widely applied to various indoor and semi-outdoor decoration scenarios.

[0009] In a possible implementation manner, the material of the stile is solid wood material or integrated bamboo material. Compared with the prior art, the present utility model adopts this structure to overall strengthen the strength of the board, can reduce the impact of impact, disperse the acting force, and will not cause overall damage.

[0010] In a possible implementation manner, the fiber directions of the upper rail, the middle rail and the lower rail are all parallel, and the fiber direction of the upper rail is perpendicular to the fiber direction of the stile.

[0011] Compared with the prior art, in the present utility model, the upper rail, the middle rail and the lower rail are perpendicularly arranged with the stile to form an internal frame structure. This vertical arrangement reduces the deformation under the action of external forces. At the same time, this structural design improves the stability of the overall structure of the door panel by increasing internal support, so that when the door panel bears a load or is impacted, it can better disperse the force and improve the anti-deformation and anti-impact performance.

[0012] In a possible implementation manner, the materials of the integrated bamboo panel and the integrated bamboo back panel are both integrated bamboo materials, and the materials of the upper rail, the middle rail and the lower rail are solid wood materials or integrated bamboo materials.

[0013] Compared with the prior art, the bamboo integrated material adopted in the present utility model is formed by side splicing or flat splicing and pressing of bamboo strips, which not only inherits the high strength, high hardness and good stability of bamboo, but also retains the texture and beauty of bamboo.

[0014] Compared with the prior art, when the fiber directions of the upper mullion, middle mullion and lower mullion of the present utility model are perpendicular to the fiber direction of the side mullion, this orthogonal structure can significantly improve the overall structural stability of the door panel. The perpendicular fiber direction helps to disperse the force applied to the door panel, thereby increasing the dimensional stability of the door panel, as well as the anti-deformation and anti-impact performance.

[0015] In a possible implementation manner, functional materials are provided in both the first filling cavity and the second filling cavity, and the functional materials are thermal insulation and sound insulation materials or fireproof materials.

[0016] Compared with the prior art, by adopting the above structure, the present utility model can effectively reduce the strength of the overall board and can improve other properties of the board such as sound insulation and thermal insulation. The improvement of the comprehensive performance can effectively expand the application range of the bamboo wood orthogonal composite door panel and help to realize the integration of the door panel structure and decoration.

[0017] In a possible implementation manner, the integrated bamboo panel and the core layer, and the core layer and the integrated bamboo back panel are glued together through a structural adhesive.

[0018] In a possible implementation manner, the material of the structural adhesive is one-component polyurethane or two-component isocyanate emulsion polymer, and the application amount is 120 - 300 g / m 2 。

[0019] Compared with the prior art, by adopting the above material selection in the present utility model, among them, the one-component polyurethane structural adhesive has good gluing effect on bamboo and wood, and its gluing durability is much higher than that of traditional splice glue; while the two-component isocyanate emulsion polymer not only has the above advantages, but also its faster curing speed helps to improve the manufacturing efficiency. The door panels made by these two adhesives have gluing strength and durability that meet the performance requirements of solid wood door panels.

[0020] In a possible implementation manner, the thicknesses of the integrated bamboo panel, the core layer and the integrated bamboo back panel are all 10 - 30 mm.

[0021] Compared with the prior art, by adopting the above structure in the present utility model, the thickness of each unit layer is the same. While meeting the strength requirements, it can also well solve problems such as board cracking and shrinkage.

[0022] Other improved features and advantages of the present utility model will be described in the subsequent specific implementation manners, and part of them will become obvious from the description or can be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the structures specifically pointed out in the description and the drawings. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the overall structure of a bamboo-wood orthogonal composite door panel;

[0024] Figure 2 It is a schematic diagram of the structure of the bamboo-wood orthogonal composite door panel in Embodiment 1;

[0025] Figure 3 It is a schematic diagram of the structure of the bamboo-wood orthogonal composite door panel in Embodiment 2.

[0026] Explanation of reference numerals:

[0027] 1. Integrated bamboo panel; 2. Integrated bamboo back panel; 3. Side stile; 4. Solid wood sawn timber; 5. Top stile; 6. Middle stile; 7. Bottom stile; 8. Functional material. Specific embodiments

[0028] First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0029] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0030] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0031] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] As Figure 1 and Figure 2As shown, in a first aspect, the present utility model provides a bamboo-wood orthogonally composite door panel, which is characterized in that it includes an integrated bamboo panel 1, a core layer, and an integrated bamboo back panel 2 that are sequentially stacked. The fiber directions of the integrated bamboo panel 1 and the integrated bamboo back panel 2 are parallel. The core layer includes two side stiles 3, an upper stile 5, a middle stile 6, and a lower stile 7. The two side stiles 3 are oppositely arranged and parallel to the fiber direction of the integrated bamboo panel. The upper stile 5, the middle stile 6, and the lower stile 7 are perpendicular to the fiber direction of the integrated bamboo panel 1. A first filling cavity is formed between the upper stile 5, the middle stile 6, and the side stile 3, and a second filling cavity is formed between the middle stile 6, the lower stile 7, and the side stile 3.

[0033] By placing the whole bamboo integrated board on the inner and outer surfaces, the thickness of the bamboo strips can be adjusted during the manufacturing process, and small-diameter bamboo strips can be reasonably utilized. The integrated bamboo board is not only wear-resistant and scratch-resistant, has good dimensional stability, but also uses less glue, and can retain the texture and beauty of the bamboo. The bamboo integrated materials used for the two side stiles 3 can use the cut-off scraps from the whole board and be cut into bamboo strips with appropriate length, width, and thickness to achieve secondary utilization.

[0034] In some embodiments, solid wood sawn timber 4 is filled in both the first filling cavity and the second filling cavity, and the fiber direction of the solid wood sawn timber 4 is perpendicular to the fiber direction of the integrated bamboo panel 1.

[0035] Solid wood not only has good mechanical properties but also performs excellently in terms of heat preservation, sound insulation, and fire prevention. Specifically, the materials of the solid wood sawn timber 4 can use domestic Yunnan pine, rubber wood, spruce, etc., and imported materials can use spruce, hemlock, SPF, etc. The wood of the core layer can be adjusted according to the size and thickness of the raw materials, and is not limited to the size and width of the raw materials.

[0036] Specifically, the material of the side stile 3 is a solid wood material or an integrated bamboo material. The materials of the integrated bamboo panel 1 and the integrated bamboo back panel 2 are both integrated bamboo materials. The materials of the upper stile 5, the middle stile 6, and the lower stile 7 are solid wood materials or integrated bamboo materials. In the present utility model, the integrated bamboo material is formed by side splicing or flat splicing and pressing of bamboo strips. Since the integrated material has a relatively high impact resistance, even if it is hollow inside, it can ensure the strength of the door panel. And the fiber direction of the solid wood sawn timber 4 is perpendicular to the fiber direction of the side stile 3. The design that the fiber direction of the solid wood sawn timber 4 is perpendicular to the fiber direction of the side stile 3 is based on an important principle of wood physics, namely "cross-laminated". This structural design helps to improve the overall dimensional stability and anti-deformation ability.

[0037] Such as Figure 1 and Figure 3As shown, in the second aspect, the present utility model provides another bamboo-wood orthogonally composite door panel, which comprises an integrated bamboo panel 1, a core layer, and an integrated bamboo back panel 2 that are laminated in sequence, and is pressed with a formaldehyde-free and environmentally friendly structural adhesive. The core layer of the door panel includes two side stiles 3 parallel to the fiber direction of the bamboo (back) panel, and upper stiles 5, middle stiles 6, and lower stiles 7 perpendicular thereto, forming a filling space therebetween. The filling material includes common heat-insulating and sound-insulating materials or fire-resistant materials, such as XPS polystyrene boards, etc.

[0038] Specifically, the filling part includes upper stiles 5, middle stiles 6, and lower stiles 7 perpendicular to the side stiles 3, and the two sides of the upper stiles 5, middle stiles 6, and lower stiles 7 are usually not fixed to the corresponding side stiles 3. The materials of the integrated bamboo panel 1, integrated bamboo back panel 2, upper stiles 5, middle stiles 6, lower stiles 7, and side stiles 3 are all integrated bamboo materials. The fiber directions of the upper stiles 5, middle stiles 6, and lower stiles 7 are parallel, and the fiber direction of the upper stiles 5 is perpendicular to that of the side stiles 3.

[0039] In a specific implementation form, a first filling cavity is formed between the upper stiles 5, middle stiles 6, and side stiles 3, and a second filling cavity is formed between the middle stiles 6, lower stiles 7, and side stiles 3. Functional materials 8 are provided in both the first filling cavity and the second filling cavity. The functional materials 8 can be selected from commonly used commercially available heat-insulating and sound-insulating materials or fire-proof materials, such as XPS polystyrene boards, etc., so as to further improve the comprehensive performance of the bamboo-wood orthogonally composite door panel.

[0040] For the above two implementation manners, specifically, the material of the structural adhesive is one-component polyurethane or two-component isocyanate emulsion polymer, and the application amount of the structural adhesive is 120 - 300 g / m 2 . In actual applications, the choice of the structural adhesive depends on the specific application environment, performance requirements, and cost considerations of the structure of the bamboo-wood orthogonally composite door panel.

[0041] Furthermore, the thicknesses of the integrated bamboo panel 1, the core layer, and the integrated bamboo back panel 2 are all 10 - 30 mm, and the thickness of each layer unit is the same, which can well solve problems such as cracking and shrinkage of the board while meeting the strength requirements.

[0042] Embodiment 1

[0043] As Figure 1 and Figure 2 shown, this embodiment provides a bamboo-wood orthogonally composite door panel, and the specific preparation process is as follows: Sand and cut the surface of the whole integrated bamboo board to the required size, and the excess part can be used as the material for the side stiles 3. Plane and sand both sides of the 20-mm-thick spruce sawn timber, and control the thickness of the material to 15 mm;

[0044] Place the sanded integrated bamboo board as the integrated bamboo back panel 2 at the lower layer. After coating the structural adhesive with a glue applicator, place the side rails 3 and solid wood sawn timber 4, and then coat the glue again. Cover it with an integrated bamboo board as the integrated bamboo front panel 1 and then assemble it into a three-layer structure board. The glue application amount is 160 g / m 2 ;

[0045] Press the assembled board at a pressure of 2 MPa for 60 min at a temperature of 15 - 35 °C, and store the pressed board for 72 hours at a temperature of 15 - 35 °C;

[0046] Cut the board that has been cured and maintained to the height required for the door panel and trim the edges;

[0047] Then sand 0.5 - 1 mm thick on the surface and apply wood wax oil. After drying, make a door panel with a thickness of 45 mm.

[0048] The heat transfer coefficient of this bamboo-wood orthogonal composite door panel is 1.48 (W / m 2 ·K), achieving an 8-level heat preservation effect, and the impregnation peeling rate is less than 5%. The gluing effect of this bamboo-wood orthogonal composite door panel can meet the use requirements of interior doors and even exterior opening doors.

[0049] Example 2

[0050] As Figure 1 and Figure 3 shown, this example provides a bamboo-wood orthogonal composite door panel. The specific preparation process is as follows: Sand and cut the surface of the whole integrated bamboo board to the required size. The excess part can be used as the material for the side rails 3. Plane and sand both sides of the 20-mm-thick spruce sawn timber and control the thickness at 15 mm;

[0051] Place the sanded integrated bamboo board as the integrated bamboo back panel 2 at the lower layer. After coating the structural adhesive with a glue applicator, place the frame structure composed of bamboo laminated lumber. Specifically, the frame structure includes two side rails 3 parallel to the fiber direction of the bamboo front (back) panel, and the upper rail 5, middle rail 6, and lower rail 7 perpendicular to the side rails 3. A first filling cavity is formed between the upper rail 5, middle rail 6, and side rails 3, and a second filling cavity is formed between the middle rail 6, lower rail 7, and side rails 3. Fill the polystyrene (XPS) as the functional material 8 into the first filling cavity and the second filling cavity. After coating the glue again, cover it with an integrated bamboo board as the integrated bamboo front panel 1 and then assemble it into a three-layer structure board. The glue application amount is 160 g / m 2 ;

[0052] Press the assembled board at a pressure of 2 MPa for 60 min at a temperature of 15 - 35 °C, and store the pressed board for 72 hours at a temperature of 15 - 35 °C;

[0053] Cut the board that has been cured and maintained to the height required for the door panel and trim the edges;

[0054] Then, sand 0.5-1 mm of the surface and apply wood wax oil. After drying, make a door panel with a thickness of 45 mm.

[0055] The heat transfer coefficient of the bamboo-wood orthotropic composite door panel is 1.04 (W / m 2 ·K), achieving a 10-level heat preservation effect, and the impregnation peeling rate is less than 5%. The gluing effect of the bamboo-wood orthotropic composite door panel can meet the use requirements of interior doors and even exterior doors.

[0056] In the description of the embodiments of the present application, it should be noted that in the description of the present application, the terms "inner", "outer", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0057] In the description of the present application, the descriptions referring to terms such as "one embodiment", "some embodiments", "in this embodiment", "specific examples", or "some examples", etc., mean that the specific features, mechanisms, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0058] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A bamboo-wood orthogonal composite door panel, characterized in that: The invention comprises an integrated bamboo panel (1), a core layer and an integrated bamboo backboard (2) which are stacked in sequence, wherein the fiber directions of the integrated bamboo panel (1) and the integrated bamboo backboard (2) are parallel, the core layer comprises two side bars (3), an upper bar (5), a middle bar (6) and a lower bar (7), the two side bars (3) are arranged opposite to each other and are parallel to the fiber direction of the integrated bamboo panel (1), the upper bar (5), the middle bar (6) and the lower bar (7) are perpendicular to the fiber direction of the integrated bamboo panel (1), a first filling cavity is formed between the upper bar (5), the middle bar (6) and the side bars (3), and a second filling cavity is formed between the middle bar (6), the lower bar (7) and the side bars (3).

2. The bamboo-wood orthogonal composite door panel according to claim 1, characterized in that: The first filling cavity and the second filling cavity are both filled with solid sawn wood (4), and the fiber direction of the solid sawn wood (4) is perpendicular to the fiber direction of the integrated bamboo panel (1).

3. The bamboo-wood orthogonal composite door panel according to claim 1, characterized in that: The side stile (3) is made of solid wood or integrated bamboo.

4. The bamboo-wood orthogonal composite door panel according to claim 1, characterized in that: The integrated bamboo panel (1) and the integrated bamboo back panel (2) are both made of integrated bamboo material, and the upper stile (5), the middle stile (6) and the lower stile (7) are made of solid wood material or integrated bamboo material.

5. The bamboo-wood orthogonal composite door panel according to claim 1, characterized in that: The fiber directions of the upper stile (5), the middle stile (6) and the lower stile (7) are all parallel, and the fiber directions of the upper stile (5) and the side stile (3) are perpendicular to each other.

6. The bamboo-wood orthogonal composite door panel according to claim 1, characterized in that: Functional materials (8) are provided in both the first filling cavity and the second filling cavity, and the functional materials are heat-insulating and sound-insulating materials or fire-proof materials.

7. The bamboo-wood orthogonal composite door panel according to claim 1, characterized in that: The integrated bamboo panel (1) and the core layer, and the core layer and the integrated bamboo back panel (2) are bonded together using a structural adhesive.

8. The bamboo-wood orthogonal composite door panel according to claim 1, characterized in that: The thickness of the integrated bamboo panel (1), the core layer and the integrated bamboo backboard (2) are all 10-30 mm.

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