Lightweight panel, lightweight baseplate, and lightweight composite baseplate

Abstract

Disclosed in the present utility model are a lightweight panel, a lightweight baseplate, and a lightweight composite baseplate. The panel has a flat plate shape and comprises: a plurality of unit strips, wherein the plurality of unit strips are sequentially arranged in parallel along the thicknesswise edges or the widthwise edges thereof; and a plurality of adhesive layers, which are provided between adjacent unit strips, wherein the unit strips are sequentially arranged in parallel along the thicknesswise edges thereof, and a plurality of first weight-reduction holes extending in the lengthwise direction and formed on the widthwise edge are distributed on at least one unit strip; or the unit strips are sequentially arranged in parallel along the widthwise edges thereof, and a plurality of first weight-reduction holes extending in the lengthwise direction and formed on the thicknesswise edge are distributed on at least one unit strip; and the positions of the first weight-reduction holes correspond to the widthwise edge of the panel. According to the present utility model, by providing the weight-reduction holes, the air-dry density of the panel is reduced, the bending strength of the panel satisfying use requirements is maintained while reducing the weight, and strength requirements for producing the lightweight baseplate or the lightweight composite baseplate are satisfied.

Description

Lightweight plate, lightweight base plate and lightweight composite base plate Technical Field

[0001] The utility model relates to the technical field of plate processing, in particular to a lightweight plate, a lightweight base plate and a lightweight composite base plate. Background Art

[0002] In recent years, with the advancement of new technologies and materials, lightweight logistics and transportation has become a key trend in the development of the modern logistics industry. Lightweighting of transport vehicles is a key approach to lightweight logistics and transportation, and lightweighting of vehicle bodies is a crucial component of this approach. Currently, research is focused on the application of lightweight materials in transport vehicles, such as aluminum, magnesium alloys, plastics, and fiberglass or carbon fiber. The floor is one of the three main materials used in a vehicle body. The use of lightweight floor products can effectively reduce vehicle weight, achieving lightweight transport.

[0003] Currently, the main lightweight floor panels for vehicles include: 1. Honeycomb panels, including plastic honeycomb panels, aluminum-plastic honeycomb panels, and steel-plastic honeycomb panels. These panels are expensive, have low strength, and are therefore limited in scope. 2. Composite floor panels, such as crisscross / cross-shaped core panels, are numerous, but their low bending and compressive strengths make them inadequate for vehicle floor applications. 3. Plywood, including core and face panels, typically features vertical perforations in the core to reduce weight. However, these vertical perforations compromise the inherent bending strength of the panel, making it inadequate for the high-strength requirements of vehicle floor applications. (See Patent 95232045.2.)

[0004] The above-mentioned lightweight floor products for vehicles provided in the related art all have limitations, resulting in the inability to meet the lightweight and high-strength requirements of the vehicle floor, and there is room for further improvement.

[0005] Utility Model Content

[0006] The embodiments of the present application provide a lightweight plate, a lightweight base plate, and a lightweight composite base plate to at least solve the problems existing in the prior art with lightweight base plates for vehicles.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] In a first aspect, an embodiment of the present application provides a lightweight plate, which is in a flat plate shape and includes:

[0009] There are several unit bars, each of which has a length side, a width side and a thickness side, and the length side is larger than the width side, and the width side is larger than the thickness side. Several unit bars are arranged in parallel along their thickness side or width side.

[0010] A plurality of adhesive layers are provided between two adjacent unit strips to bond the unit strips together under high temperature and pressure to form the plate;

[0011] Wherein, the unit bars are arranged in parallel along their thickness sides, and at least one of the unit bars is provided with a plurality of weight-reducing holes opened on its width side and extending along its length; or,

[0012] The unit bars are arranged in parallel along their width sides, and at least one of the unit bars is provided with a plurality of weight-reducing holes 1 opened along its thickness side and extending along its length;

[0013] The position of the weight-reducing hole corresponds to the width side of the plate.

[0014] In some embodiments, the minimum distance between the first weight-reducing hole and the edge of the unit bar is greater than or equal to 1 mm, and the minimum distance between adjacent first weight-reducing holes is greater than or equal to 0.1 mm.

[0015] In some embodiments, barrier strips are provided on both sides of the widthwise edge of the plate to prevent the weight-reducing holes from being set through.

[0016] In some embodiments, the unit strips are bamboo strips, or a combination of bamboo strips and wooden strips; and the barrier strips are bamboo strips, or a combination of bamboo strips and wooden strips. It is understood that since bamboo grows along its fiber direction, the length of the bamboo strips corresponds to the bamboo fiber direction, the width corresponds to the bamboo chord direction, and the thickness corresponds to the bamboo radial direction.

[0017] In some embodiments, the barrier strips include a plurality of barrier strips 1 and / or a plurality of barrier strips 2, and a plurality of weight-reducing holes 2 are distributed on the widthwise side or the thicknesswise side of the barrier strips 1, and the weight-reducing holes 2 are correspondingly arranged on the widthwise side of the plate;

[0018] The first weight-reducing hole on the unit strip and the second weight-reducing hole on at least one first barrier strip are staggered so as not to extend through the width of the sheet. In this embodiment, the first and second weight-reducing holes can have the same diameter and any shape, including but not limited to circular, elliptical, rectangular, and triangular, with circular being the preferred shape.

[0019] In some embodiments, the second weight-reducing hole on a single barrier strip (1) is staggered with the second weight-reducing hole on at least one other barrier strip so as not to extend through the width of the panel. In this embodiment, one or both of the first and second barrier strips are provided, and both are positioned along the edges of the panel to prevent rainwater and garbage from entering the panel when used as a floor.

[0020] In some embodiments, the minimum value of the edge between the second weight-reducing hole and the first barrier strip is greater than or equal to 1 mm, and the minimum value of the spacing between adjacent second weight-reducing holes is greater than or equal to 0.1 mm.

[0021] In some embodiments, the adhesive layer is provided between the first barrier strip and / or the second barrier strip and the unit strip.

[0022] In some embodiments, the thickness of the plate is 6 mm to 37 mm.

[0023] On the second aspect, an embodiment of the present application provides a lightweight bottom plate, which is the plate material described in the first aspect as the base material and is processed by one or more methods of splicing, finger jointing, and mortise and tenon jointing; in this embodiment, the processed lightweight bottom plate is adapted to the requirements of the 53-foot special box bottom plate. Currently, the maximum thickness of the 53-foot special box bottom plate is 31.75 mm. The 33 mm plate material is taken as the base material, and is sawed into strips, mortised, etc., and then widened, lengthened, sanded, and other processing methods are used to make a 31.75 mm lightweight bottom plate to meet the requirements of the 53-foot special box bottom plate.

[0024] On the third aspect, an embodiment of the present application provides a lightweight composite floor panel, which includes the board material described in the first aspect and a surface material arranged on the surface of the board material, wherein the surface material is one or a combination of bamboo veneer, wood veneer, non-woven fabric, glass fiber, carbon fiber, and impregnated kraft paper; in this embodiment, the processed lightweight floor panel is suitable for the floor panel requirements of buses and vans. At present, the minimum thickness of the floor panels of buses and vans is 9 mm. The 6 mm board material is taken as the base core board, and one or more of bamboo veneer, wood veneer, non-woven fabric, glass fiber, carbon fiber, and impregnated kraft paper are covered on the surface of the board material to form a 9 mm lightweight composite floor panel, which is used as the floor panel of buses and vans, providing a more beautiful, more waterproof, and more wear-resistant surface. At the same time, the board material has high strength in the longitudinal direction and relatively weak transverse strength. Arranging the surface material on the surface of the board material can effectively improve the transverse strength of the lightweight composite floor panel to meet the usage scenarios of a wider width.

[0025] Compared with related technologies, the lightweight plate, lightweight base plate, and lightweight composite base plate provided by the embodiments of the present application have at least the following technical effects:

[0026] 1. The lightweight plate provided by the present invention reduces the air-dry density of the plate by arranging weight-reducing holes, and retains the bending strength of the plate to meet the use requirements while reducing the weight, so as to meet the strength required for producing lightweight base plates or lightweight composite base plates as a base material. In addition, through the reasonable arrangement of the positions of the weight-reducing holes and the setting of the barrier strips, the weight-reducing holes on the sides of the lightweight base plate or lightweight composite base plate are not through-through, which enhances the strength of the base plate while effectively blocking rainwater and garbage from entering the interior of the base plate.

[0027] 2. The lightweight bottom plate provided by the utility model uses lightweight plate as the base material and is made into a lightweight bottom plate with sufficient strength and qualified size through one or more processing methods such as splicing, finger jointing, and mortise and tenon jointing. It is used as a 53-foot special box bottom plate to meet the needs of special box bottom plates.

[0028] 3. The lightweight composite floor provided by the utility model is made of one or more of bamboo veneer, wood veneer, non-woven fabric, glass fiber, carbon fiber, and impregnated kraft paper as surface materials on the surface of the lightweight board to make a lightweight composite floor that meets the strength requirements and is more waterproof and wear-resistant. It is used as the floor of buses and vans to meet the needs of bus and van floor.

[0029] The details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] FIG1 is a first schematic diagram of a lightweight plate structure according to an exemplary embodiment.

[0032] FIG2 is a second schematic diagram of a lightweight plate structure according to an exemplary embodiment.

[0033] FIG3 is a third schematic diagram of a lightweight plate structure according to an exemplary embodiment.

[0034] FIG4 is a fourth schematic diagram of a lightweight plate structure according to an exemplary embodiment.

[0035] FIG5 is a fifth schematic diagram of a lightweight plate structure according to an exemplary embodiment.

[0036] FIG6 is a sixth schematic diagram of a lightweight plate structure according to an exemplary embodiment.

[0037] FIG7 is a schematic diagram of a lightweight base plate structure according to an exemplary embodiment.

[0038] FIG8 is a schematic diagram showing a lightweight composite bottom plate structure according to an exemplary embodiment.

[0039] In the figure: 10, board material; 101, unit strip; 102, adhesive layer; 103, barrier strip 1; 104, barrier strip 2; 105, surface material; 11, lightweight base plate; 12, lightweight composite base plate. DETAILED DESCRIPTION

[0040] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0041] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0043] Currently, the main lightweight floor panels for vehicles include: 1. Honeycomb panels, including plastic honeycomb panels, aluminum-plastic honeycomb panels, and steel-plastic honeycomb panels. These panels are expensive, have low strength, and are therefore limited in scope. 2. Composite floor panels, such as crisscross / cross-shaped core panels, are numerous, but their low bending and compressive strengths make them inadequate for vehicle floor applications. 3. Plywood, including core and face panels, typically features vertical perforations in the core to reduce weight. However, these vertical perforations compromise the inherent bending strength of the panel, making it inadequate for the high-strength requirements of vehicle floor applications. (See Patent 95232045.2.)

[0044] Based on the above situation, the embodiments of the present invention provide a lightweight plate, a lightweight base plate and a lightweight composite base plate, which are described in detail below with reference to specific embodiments and drawings.

[0045] Example 1

[0046] An embodiment of the present utility model provides a lightweight board. FIG1 is a schematic diagram of a lightweight board structure according to an exemplary embodiment. As shown in FIG1 , the board 10 is in the shape of a flat plate, and includes a plurality of unit bars 101. The unit bars 101 are bamboo strips, which are strip-shaped as a whole and have a rectangular cross-section, with a length side, a width side and a thickness side, and the length side>the width side>the thickness side, and the plurality of unit bars 101 are arranged in parallel along their thickness sides; the adhesive layer 102, which is a plurality of in number, is arranged between two adjacent unit bars 101 to glue the unit bars 101 under high temperature and hot pressing to form the board 10; wherein,

[0047] At least one unit bar 101 is provided with a plurality of weight-reducing holes 1 on its widthwise side and extending along its lengthwise direction. The positions of the weight-reducing holes 1 correspond to the widthwise sides of the formed plate 10 .

[0048] In this embodiment, the unit bar 101 has a length * width * thickness of 2100 mm * 33 mm * 7 mm, an air-dry density of approximately 700 kg / m3, and is pretreated as follows: the unit bar 101 is dried to a moisture content of less than 10%, soaked in a phenolic adhesive with a solid content of about 30% for about 2 minutes, and then dried to a moisture content of less than 15%;

[0049] Take 57 unit bars 101 and set weight-reducing holes one on the edge of 26 of the unit bars 101 at a width of 33 mm. The weight-reducing holes one are circular and have a diameter of 15 mm to 30 mm. The minimum distance between the weight-reducing holes one and the edge of the unit bar 101 is greater than or equal to 1 mm, and the minimum distance between adjacent weight-reducing holes one is greater than or equal to 0.1 mm, so that the weight is reduced by 25%;

[0050] Subsequently, these 57 unit bars 101 are arranged in parallel along the thickness side. When the phenolic glue soaked in the pretreatment stage between two adjacent unit bars 101 is applied with high temperature hot pressing, the phenolic glue forms an adhesive layer 102 between the unit bars 101 for bonding, and the compression ratio is about 7%, resulting in a lightweight board with a length of 2100 mm, a width of about 371 mm, and a thickness of about 33 mm (wherein the width of the board 10 is calculated as: unit bar thickness * number of unit bars * (1-compression ratio) = 7*57*0.93 = 371 mm), and an air-dry density of about 620 kg / m3. Since only 26 of the unit bars 101 have a weight-reducing hole 1 set on the width side corresponding to 33 mm, the width side of the formed board 10 is not through; wherein, the position of the weight-reducing hole 1 corresponds to the width side of the formed board 10.

[0051] Example 2

[0052] The embodiment of the present utility model provides a lightweight board. Figure 2 is a second schematic diagram of the lightweight board structure according to an exemplary embodiment. As shown in Figure 2, the board 10 is in the shape of a flat plate, including a plurality of unit bars 101, which are a combination of bamboo bars and wooden bars. The unit bars 101 are all in the shape of strips, and the cross-section is rectangular, with a length side, a width side and a thickness side, and the length side> the width side> the thickness side, and a plurality of unit bars 101 are arranged in parallel along their width sides; a plurality of adhesive layers 102 are provided between two adjacent unit bars 101 to glue the unit bars 101 under high temperature and hot pressing to form the board 10; wherein, at least one unit bar 101 is provided with a plurality of weight-reducing holes 1 opened on its thickness side and extending along its length direction, and the position of the weight-reducing holes 1 corresponds to the width side of the formed board 10.

[0053] In this embodiment, the length, width, and thickness of the bamboo strips in the unit strip 101 are 2480 mm, 20 mm, and 7 mm, and the air-dry density is approximately 700 kg / m3. The length, width, and thickness of the wooden strips in the unit strip 101 are 2480 mm, 28 mm, and 7 mm, and the air-dry density is approximately 750 kg / m3. The unit strip 101 is pretreated as follows: the bamboo strips and the wooden strips are dried to a moisture content of less than 10%, and phenolic glue is applied to the bonding surfaces of the bamboo strips and the wooden strips.

[0054] Take 65 unit strips 101, of which 61 are bamboo strips and 4 are wooden strips. Set a weight-reducing hole one on the edge of each of the 61 bamboo strips corresponding to a thickness of 7 mm. The weight-reducing hole one is circular and has a diameter of 3 mm to 5 mm. The minimum distance between the weight-reducing hole one and the edge of the bamboo strip is greater than or equal to 1 mm, and the minimum distance between adjacent weight-reducing holes one is greater than or equal to 0.1 mm, so that the weight is reduced by 50%;

[0055] Subsequently, the 61 bamboo strips and 4 wooden strips are arranged in parallel along the width side. When the phenolic glue applied between the adjacent bamboo strips, wooden strips and between the bamboo strips and wooden strips in the pretreatment stage is subjected to high temperature hot pressing, the phenolic glue forms an adhesive layer 102 between the adjacent bamboo strips, adjacent wooden strips and between the bamboo strips and wooden strips for gluing. The compression ratio is about 5%, resulting in a lightweight board with a length of 2480 mm, a width of about 1265 mm and a thickness of about 7 mm (wherein the width of the board 10 is calculated as follows: unit strip width * number of unit strips * (1-compression ratio) = ((61*20+4*28)*0.95) = 1265 mm) and an air-dry density of about 404 kg / m3; wherein, the position of the weight reduction hole corresponds to the width side of the formed board 10.

[0056] Example 3

[0057] An embodiment of the present utility model provides a lightweight board. FIG3 is a third schematic diagram of a lightweight board structure according to an exemplary embodiment. As shown in FIG3 , the board 10 is in the shape of a flat plate, and includes a plurality of unit bars 101. The unit bars 101 are bamboo bars, which are strip-shaped as a whole and have a rectangular cross-section, with a length side, a width side and a thickness side, and the length side>the width side>the thickness side, and a plurality of unit bars 101 are arranged in parallel along their thickness sides; a plurality of adhesive layers 102 are provided between two adjacent unit bars 101 to glue the unit bars 101 under high temperature and hot pressing to form a board 10; wherein, at least one unit bar 101 is provided with a plurality of weight-reducing holes 1 opened on its width side and extending along its length direction, and the position of the weight-reducing hole 1 corresponds to the width side of the formed board 10;

[0058] It also includes a barrier strip 103 arranged on both sides of the width side of the board 10. The barrier strip 103 is a bamboo strip, which is strip-shaped as a whole and has a rectangular cross-section, with a length side, a width side and a thickness side. There are also several weight-reducing holes 2 distributed on the width side of the barrier strip 103, and the weight-reducing hole 1 on the unit strip 101 is staggered with the weight-reducing hole 2 on at least one barrier strip 103 so as not to be set through the width side of the board 10. At the same time, the weight-reducing hole 1 on a single barrier strip 103 is staggered with the weight-reducing hole 2 on at least one other barrier strip 103 so as not to be set through the width side of the board 10.

[0059] In this embodiment, the unit bar 101 and the barrier bar 103 have a length * width * thickness of 2100 mm * 33 mm * 7 mm, and an air-dry density of approximately 700 kg / m3. The unit bar 101 and the barrier bar 103 are pretreated as follows: the unit bar 101 and the barrier bar 103 are dried to a moisture content of less than 10%, soaked in a phenolic adhesive with a solid content of approximately 28% for approximately 2 minutes, and then dried to a moisture content of less than 15%;

[0060] Take 51 unit bars 101 and set a weight-reducing hole one at the edge corresponding to a width of 33 mm. The weight-reducing hole one is circular and has a diameter of 15 mm to 30 mm. The minimum distance between the weight-reducing hole one and the edge of the unit bar 101 is greater than or equal to 1 mm, and the minimum distance between adjacent weight-reducing holes one is greater than or equal to 0.1 mm, so that the weight is reduced by 18%;

[0061] Take 6 barrier strips 103 and open a small number of weight-reducing holes 2 of the same specifications as the weight-reducing holes on the edge of the barrier strip 103 corresponding to a width of 33 mm. The minimum distance between the weight-reducing holes 2 and the edge of the barrier strip 103 is greater than or equal to 1 mm, and the minimum distance between adjacent weight-reducing holes 2 is greater than or equal to 0.1 mm, so that the weight is reduced by 10%. The weight-reducing holes 2 on the barrier strip 103 are staggered with the weight-reducing holes 1 on the unit strip 101. The weight-reducing holes 2 on the 6 barrier strips 103 are also staggered so that they are not set through the width of the plate 10.

[0062] Subsequently, the 51 unit bars 101 and the 6 barrier bars 103 are arranged in parallel along the thickness side. The 6 barrier bars 103 are divided into two groups of three and are arranged on both sides of the 51 unit bars 101. When the phenolic glue soaked in the pretreatment stage between the adjacent unit bars 101, the adjacent barrier bars 103, and the space between the unit bars 101 and the barrier bars 103 is subjected to high-temperature hot pressing, the phenolic glue forms an adhesive layer 102 between the unit bars 101 and the barrier bars 103 for bonding. The compression ratio is about 7%, resulting in a lightweight plate with a length of 2100 mm, a width of about 371 mm, and a thickness of about 33 mm (wherein the width of the plate 10 is calculated as: unit bar thickness * number of unit bars * (1-compression ratio) = 7*57*0.93 = 371 mm), and an air-dry density of about 580 kg / m3; wherein, the positions of the weight reduction holes 1 and 2 correspond to the width side of the formed plate 10.

[0063] Example 4

[0064] An embodiment of the present utility model provides a lightweight board. Figure 4 is a fourth schematic diagram of a lightweight board structure according to an exemplary embodiment. As shown in Figure 4, the board 10 is in the shape of a flat plate, including a plurality of unit bars 101. The unit bars 101 are bamboo bars, which are strip-shaped as a whole and have a rectangular cross-section, with a length side, a width side and a thickness side, and the length side>the width side>the thickness side, and a plurality of unit bars 101 are arranged in parallel along their thickness sides; a plurality of adhesive layers 102 are provided between two adjacent unit bars 101 to glue the unit bars 101 under high temperature and hot pressing to form a board 10; wherein, at least one unit bar 101 is provided with a plurality of weight-reducing holes 1 opened on its width side and extending along its length direction, and the position of the weight-reducing hole 1 corresponds to the width side of the formed board 10;

[0065] It also includes a barrier strip 103 arranged on both sides of the width side of the board 10. The barrier strip 103 is a bamboo strip, which is strip-shaped as a whole and has a rectangular cross-section. It has a length side, a width side and a thickness side, and the length side>the width side>the thickness side. There are also several weight-reducing holes 2 distributed on the width side of the barrier strip 103, and the weight-reducing hole 1 on the unit strip 101 is staggered with the weight-reducing hole 2 on at least one barrier strip 103 so as not to be set through on the width side of the board 10. At the same time, the weight-reducing hole 1 on a single barrier strip 103 is staggered with the weight-reducing hole 2 on at least one other barrier strip 103 so as not to be set through on the width side of the board 10.

[0066] In this embodiment, the unit bar 101 and the barrier bar 103 have a length, width, and thickness of 2100 mm, 37 mm, and 7 mm, and an air-dry density of approximately 700 kg / m3. The unit bar 101 and the barrier bar 103 are pretreated as follows: the unit bar 101 and the barrier bar 103 are dried to a moisture content of less than 10%, soaked in a phenolic adhesive with a solid content of approximately 28% for approximately 2 minutes, and then dried to a moisture content of less than 15%.

[0067] Take 53 unit bars 101 and set weight-reducing holes one on the edge corresponding to a width of 37 mm. The weight-reducing holes one are circular with a diameter of 15 mm to 32 mm. The minimum distance between the weight-reducing holes one and the edge of the unit bar 101 is greater than or equal to 1 mm, and the minimum distance between adjacent weight-reducing holes one is greater than or equal to 0.1 mm, so that the weight is reduced by 18%;

[0068] Take four barrier strips 103 and open a small number of weight-reducing holes 2 of the same specification as the weight-reducing holes on the width corresponding to 37 mm of the barrier strip 103. The minimum value of the edge of the weight-reducing hole 2 and the barrier strip 103 is greater than or equal to 1 mm, and the minimum spacing between adjacent weight-reducing holes 2 is greater than or equal to 0.1 mm, so that the weight is reduced by 10%. The weight-reducing holes 2 on the barrier strip 103 are staggered with the weight-reducing holes 1 on the unit strip 101. The weight-reducing holes 2 on the four barrier strips 103 are also staggered so that they are not set through the width of the plate 10.

[0069] Then, the 53 unit bars 101 and the 4 barrier bars 103 are arranged in parallel along the thickness direction. The 4 barrier bars 103 are arranged in groups of two on both sides of the 53 unit bars 101, and a barrier bar 103 on the inner side of one side is sandwiched between the first and second unit bars 101 on the edge. When the phenolic glue soaked in the pretreatment stage between the adjacent two unit bars 101 and the barrier bar 103 is applied with lateral high temperature hot pressing, the phenolic glue is shaped. The adhesive layer 102 between the unit strips 101 is glued, and the compression ratio is about 7%, resulting in a lightweight plate with a length of 2100 mm, a width of about 371 mm, and a thickness of about 37 mm (wherein the width of the plate 10 is calculated as: unit strip thickness * number of unit strips * (1-compression ratio) = 7*57*0.93 = 371 mm), and an air-dry density of about 570 kg / cubic meter; wherein, the positions of the first and second weight-reducing holes correspond to the width edges of the formed plate 10.

[0070] Example 5

[0071] An embodiment of the present utility model provides a lightweight board. Figure 5 is a fifth schematic diagram of a lightweight board structure according to an exemplary embodiment. As shown in Figure 5, the board 10 is in the shape of a flat plate, including a plurality of unit bars 101. The unit bars 101 are bamboo bars, which are strip-shaped as a whole and have a rectangular cross-section, with a length side, a width side and a thickness side, and the length side>the width side>the thickness side, and a plurality of unit bars 101 are arranged in parallel along their thickness sides; a plurality of adhesive layers 102 are provided between two adjacent unit bars 101 to glue the unit bars 101 under high temperature and hot pressing to form a board 10; wherein, at least one unit bar 101 is provided with a plurality of weight-reducing holes 1 opened on its width side and extending along its length direction, and the position of the weight-reducing hole 1 corresponds to the width side of the formed board 10;

[0072] The second barrier strip 104 is a bamboo strip that is strip-shaped as a whole and has a rectangular cross-section with a length side, a width side and a thickness side.

[0073] In this embodiment, the length, width, and thickness of the unit bar 101 and the second barrier bar 104 are all 2100 mm * 33 mm * 7 mm, and the air-dry density is approximately 700 kg / m3. The unit bar 101 and the second barrier bar 104 are pretreated. The pretreatment method is as follows: the unit bar 101 and the second barrier bar 104 are dried to a moisture content of less than 10%, soaked in phenolic glue with a solid content of about 25% for about 2 minutes, and then dried to a moisture content of less than 15%;

[0074] Take 55 unit bars 101 and set a weight-reducing hole one at the edge corresponding to a width of 33 mm. The weight-reducing hole one is circular and has a diameter of 15 mm to 30 mm. The minimum distance between the weight-reducing hole one and the edge of the unit bar 101 is greater than or equal to 1 mm, and the minimum distance between adjacent weight-reducing holes one is greater than or equal to 0.1 mm, so that the weight is reduced by 25%;

[0075] Subsequently, the 55 unit bars 101 and the two barrier bars 104 are arranged in parallel along the thickness side, and the two barrier bars 104 are respectively arranged on both sides of the 55 unit bars 101. When the phenolic glue soaked between the two adjacent unit bars 101 and the barrier bars 104 in the pretreatment stage is applied with high temperature hot pressing, the phenolic glue forms an adhesive layer 102 between the unit bars 101 and the barrier bars 104 for bonding, and the compression ratio is about 7%, resulting in a lightweight plate with a length of 2100 mm, a width of about 371 mm, and a thickness of about 33 mm (wherein the width of the plate 10 is calculated as: unit bar thickness * number of unit bars * (1-compression ratio) = 7*57*0.93 = 371 mm), and an air-dry density of about 530 kg / m3; wherein, the position of the weight reduction hole 1 corresponds to the width side of the formed plate 10.

[0076] Example 6

[0077] An embodiment of the present utility model provides a lightweight board. Figure 6 is a sixth schematic diagram of a lightweight board structure according to an exemplary embodiment. As shown in Figure 6, the board 10 is in the shape of a flat plate, including a plurality of unit bars 101. The unit bars 101 are bamboo bars, which are strip-shaped as a whole and have a rectangular cross-section, with a length side, a width side and a thickness side, and the length side>the width side>the thickness side, and a plurality of unit bars 101 are arranged in parallel along their thickness sides; a plurality of adhesive layers 102 are provided between two adjacent unit bars 101 to glue the unit bars 101 under high temperature and hot pressing to form a board 10; wherein, at least one unit bar 101 is provided with a plurality of weight-reducing holes 1 opened on the thickness side of the unit bar and extending along its length direction, and the position of the weight-reducing holes 1 corresponds to the width side of the formed board 10;

[0078] It also includes a barrier strip 103 and a barrier strip 104 arranged on both sides of the width side of the plate 10. The barrier strip 103 and the barrier strip 104 are both bamboo strips, which are strip-shaped as a whole and have a rectangular cross-section, with a length side, a width side and a thickness side, and the length side is greater than the width side and the thickness side. There are also several weight-reducing holes 2 distributed on the width side of the barrier strip 103.

[0079] In this embodiment, the unit bar 101, the barrier bar 103, and the barrier bar 104 have a length, width, and thickness of 2100 mm, 33 mm, and 7 mm, and an air-dry density of approximately 700 kg / m3. The unit bar 101, the barrier bar 103, and the barrier bar 104 are pretreated. The pretreatment method is as follows: the unit bar 101, the barrier bar 103, and the barrier bar 104 are dried to a moisture content of less than 10%, soaked in phenolic glue with a solid content of approximately 28% for approximately 2 minutes, and then dried to a moisture content of less than 15%.

[0080] Take 53 unit bars 101 and set a weight-reducing hole 1 at the edge corresponding to a width of 33 mm. The weight-reducing hole 1 is circular and has a diameter of 15 mm to 30 mm. The minimum distance between the weight-reducing hole 1 and the edge of the unit bar 101 is greater than or equal to 1 mm, and the minimum distance between adjacent weight-reducing holes 1 is greater than or equal to 0.1 mm, so that the weight is reduced by 18%;

[0081] Take two barrier strips 103 and create a small number of second weight-reducing holes of the same size as the weight-reducing holes on the sides of the barrier strip 103, corresponding to a width of 33 mm. The minimum distance between the second weight-reducing holes and the edge of the barrier strip 103 is greater than or equal to 1 mm, and the minimum distance between adjacent second weight-reducing holes is greater than or equal to 0.1 mm, so that the weight is reduced by 10%;

[0082] Then, the 51 unit bars 101, the two barrier bars 103 and the two barrier bars 104 are arranged in parallel along the thickness direction. The two barrier bars 103 are arranged on both sides of the thickness direction of the 51 unit bars 101. Then, the two barrier bars 104 are arranged on both sides of the thickness direction of the two barrier bars 103. When the phenolic glue soaked in the pretreatment stage between the barrier strips 2 104 is subjected to high temperature hot pressing, the phenolic glue forms the unit strip 101, the barrier strip 1 103 and the adhesive layer 102 between the barrier strips 2 104 for bonding, with a compression ratio of about 7%, resulting in a lightweight plate with a length of 2100 mm, a width of about 371 mm, and a thickness of about 33 mm (wherein the width of the plate 10 is calculated as: unit strip thickness * number of unit strips * (1-compression ratio) = 7*57*0.93 = 371 mm), and an air-dry density of about 560 kg / m3; wherein, the positions of the weight reduction hole 1 and the weight reduction hole 2 correspond to the width edge of the formed plate 10.

[0083] In Examples 1 to 6 above, bamboo was used as the raw material to produce lightweight panels. While reducing the air-dry density, the panels retained sufficient bending strength to meet the requirements of their intended use. Compared to other materials, bamboo panels possess the strength required for producing lightweight floor panels and lightweight composite floor panels. See Table 1 for details.

[0084] Schedule 1

[0085] As shown in Appendix 1, compared with traditional boards or oak boards, lightweight boards have the necessary strength to produce lightweight baseboards and lightweight composite baseboards.

[0086] Example 7

[0087] This embodiment provides a lightweight base plate. Figure 7 is a schematic diagram of the lightweight base plate structure according to an exemplary embodiment. Referring to Figure 7, the lightweight base plate 11 utilizes one of Examples 1, 3-6, and other lightweight sheet materials produced to different specifications using the technical solutions described in this utility model specification as a base material. The lightweight sheet materials are processed into a lightweight base plate using one or more sheet material processing techniques, such as splicing, finger jointing, and mortise and tenon jointing, for use as a 53-foot special container base plate, meeting the requirements for special container base plates. Preferably, when the lightweight sheet material is used as the base material, barrier strips 103 and / or 104 are provided on both sides of the width of each lightweight sheet material to prevent the ingress of rainwater and garbage during use.

[0088] Taking the North American 53-foot special container as an example, the specific dimensions and quantity of a set of bottom plates are shown in Appendix 2.

[0089] Schedule 2

[0090] Combined with Appendix 2, the current conventional wood board, such as the bottom board of the 53-foot special container in North America, is oak board with an air-dry density of about 750 kg / m3. Each box uses 1.11 cubic meters of bottom board.

[0091] Refer to Appendix 3

[0092] Schedule 3

[0093] With reference to Figure 7, the sheet material floor provided by the present invention, taking Example 1 as an example, has an air-dry density of approximately 620 kg / m³, reducing the weight of each container by 144.3 kg. According to statistics, for every 100 kg reduction in vehicle body weight, fuel consumption decreases by 0.3-0.5 liters per 100 kilometers. Thus, using the lightweight floor provided by the present invention, fuel consumption for a North American 53-foot specialty container decreases by 0.43-0.72 liters per 100 kilometers.

[0094] Example 8

[0095] This embodiment provides a lightweight composite floor panel. Figure 8 is a schematic diagram of the structure of a lightweight composite floor panel according to an exemplary embodiment. Referring to Figure 8 , this lightweight composite floor panel 12 utilizes one of Examples 1-6, as well as other lightweight panels produced using the technical solutions described in this utility model specification but with different production specifications, as a base material. A surface layer 105 of one or a combination of bamboo veneer, wood veneer, glass fiber, carbon fiber, impregnated kraft paper, or the like is applied to the base material. The resulting lightweight composite floor panel 12 meets the requirements of passenger bus and van floor panels.

[0096] Among them, taking the European side curtain compartment as an example, the specific size and quantity of a set of bottom plates are shown in Appendix 4.

[0097] Schedule 4

[0098] Conventional wood plywood, such as birch plywood used for the floor panels of European curtain-side vehicles, has an air-dry density of approximately 740 kg / m³, according to Tables 3-4. Each vehicle floor panel is 0.80 m³. The composite floor panel provided by the present invention has an air-dry density of approximately 600 kg / m³, reducing the weight of each vehicle by 112 kg. According to statistics, every 100 kg reduction in vehicle body weight reduces fuel consumption by 0.3-0.5 L / 100 km. Thus, using the lightweight composite floor panel provided by the present invention reduces fuel consumption by 0.34-0.56 L / 100 km for European curtain-side vehicles.

[0099] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A lightweight plate, characterized in that: The plate (10) is in the shape of a flat plate and comprises: The unit bars (101) are arranged in parallel along their thickness or width directions. A plurality of adhesive layers (102) are provided between two adjacent unit bars (101) to bond the unit bars (101) under high temperature and pressure to form the plate (10); The unit bars (101) are arranged in parallel along their thickness sides, and at least one of the unit bars (101) is provided with a plurality of weight-reducing holes opened along its width sides and extending along its length sides; or The unit bars (101) are sequentially arranged in parallel along their widthwise edges, and at least one of the unit bars (101) is provided with a plurality of weight-reducing holes 1 opened along its thicknesswise edges and extending along its lengthwise edges; The position of the weight-reducing hole corresponds to the width side of the plate (10).

2. The lightweight plate according to claim 1, characterized in that The minimum value of the edge between the first weight-reducing hole and the unit bar (101) is greater than or equal to 1 mm, and the minimum value of the spacing between adjacent first weight-reducing holes is greater than or equal to 0.1 mm.

3. The lightweight plate according to claim 1, characterized in that Both sides of the width of the plate (10) are provided with barrier strips so that the weight-reducing holes are not provided through-holes.

4. The lightweight plate according to claim 3, characterized in that The unit strips (101) are bamboo strips, or a combination of bamboo strips and wooden strips; the barrier strips are bamboo strips, or a combination of bamboo strips and wooden strips.

5. The lightweight plate according to claim 3, characterized in that: The barrier strips include a plurality of barrier strips 1 (103) and / or a plurality of barrier strips 2 (104), and a plurality of weight-reducing holes 2 are distributed on the width side or thickness side of the barrier strip 1 (103), and the weight-reducing holes 2 are correspondingly arranged on the width side of the plate (10); The positions of the weight-reducing hole 1 on the unit strip (101) and the weight-reducing hole 2 on at least one barrier strip 1 (103) are staggered so as not to be continuous on the width side of the plate (10).

6. The lightweight plate according to claim 5, characterized in that: The second weight-reducing hole on a single barrier strip (103) is staggered with the second weight-reducing hole on at least one other barrier strip (103) so as not to be continuous on the width side of the plate (10).

7. The lightweight plate according to claim 5, characterized in that: The minimum value of the edge between the second weight-reducing hole and the first barrier strip (103) is greater than or equal to 1 mm, and the minimum value of the spacing between adjacent second weight-reducing holes is greater than or equal to 0.1 mm.

8. The lightweight plate according to claim 5, characterized in that: The adhesive layer (102) is provided between the barrier strip 1 (103) and / or the barrier strip 2 (104) and the unit strip (101).

9. A lightweight base plate, characterized in that: The lightweight base plate (11) is formed by using the plate (10) described in any one of claims 1 to 8 as a base material through one or more processes such as splicing, finger jointing, and mortise and tenon jointing.

10. A lightweight composite base plate, characterized in that: The lightweight composite base plate (12) comprises a plate (10) according to any one of claims 1 to 8 and a surface material (105) arranged on the surface of the plate (10), wherein the surface material (105) is one or a combination of bamboo veneer, wood veneer, non-woven fabric, glass fiber, carbon fiber, and impregnated kraft paper.

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