CN217573279U

CN217573279U - Novel bamboo-wood composite board for railway flatcar

Info

Publication number: CN217573279U
Application number: CN202221091403.8U
Authority: CN
Inventors: 胡新华
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2022-10-14
Anticipated expiration: 2032-05-09

Abstract

The utility model provides a novel bamboo wood composite sheet of railway flatcar, its characterized in that: the bamboo curtain comprises a top layer, a bottom layer and a middle layer, wherein the top layer and the bottom layer respectively comprise at least 2 layers of longitudinal bamboo curtains; the middle layer comprises at least 5 wood veneer layers; and the weight percentage of the unit volume of the wood veneer layer is 70-80%; the weight percentage of the unit volume of the longitudinal bamboo curtain is 20-30%; the longitudinal bamboo curtain on the top layer, the wood veneer layer on the middle layer and the longitudinal bamboo curtain on the bottom layer are sequentially stacked through gum dipping or gluing and are combined into a whole through hot pressing. The novel bamboo wood composite sheet of railway flatcar, can replace imported camphorwood preparation train flat base plate to solve the problem that panel is nervous, with high costs, be an ideal, economic railway flatcar bottom plate material.

Description

Novel bamboo-wood composite board for railway flatcar

Technical Field

The utility model relates to a bamboo wood composite sheet, especially novel bamboo wood composite sheet of railway flatcar.

Background

The traditional train flat-bottom plate is mainly made of pinus sylvestris, the supply of the pinus sylvestris is increasingly tense, and people have to seek other materials.

Therefore, a new bamboo-wood composite board suitable for railway flat cars is a goal pursued by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a first aim at solve the panel of current train flat bed board need import, and the material is nervous, problem with high costs.

In order to achieve the purpose, the utility model provides a novel bamboo wood composite sheet of railway flatcar, its characterized in that: the bamboo curtain comprises a top layer, a bottom layer and a middle layer, wherein the top layer and the bottom layer respectively comprise at least 2 layers of longitudinal bamboo curtains; the intermediate layer comprises at least 5 wood veneer layers; and the weight percentage of the unit volume of the wood veneer layer is 70-80%; the weight percentage of the unit volume of the longitudinal bamboo curtain is 20-30%; the longitudinal bamboo curtain on the top layer, the wood veneer layer on the middle layer and the longitudinal bamboo curtain on the bottom layer are sequentially stacked through gum dipping or gluing and are combined into a whole through hot pressing.

Preferably, the method comprises the following steps: at least 5 wood veneer layers in the middle layer form a wood veneer unit, and a layer of longitudinal bamboo curtain is arranged between every two adjacent wood veneer units.

Preferably, wherein: the thickness of each wood veneer layer is more than or equal to 1mm and less than or equal to 3mm.

Preferably, the method comprises the following steps: the thickness of the longitudinal bamboo curtain is more than or equal to 1mm and less than or equal to 5mm.

Preferably, the method comprises the following steps: the wood veneer layer is formed by longitudinally laying a plurality of wood veneers, the adjacent wood veneers of each layer are longitudinally butted, and the butt joints are staggered with each other; adjacent wood veneers of said layers are offset from each other along the longitudinal butt seam.

Preferably, wherein: the wood veneer layer is formed by longitudinally laying a plurality of wood veneers, each layer of wood veneers is in lap joint along the longitudinal direction, lap joints of adjacent wood veneers of each layer along the longitudinal direction are staggered with each other, and the overlapping length of the lap joints is 1-2cm.

Preferably, the method comprises the following steps: the longitudinal butt joint of each layer of the wood single sheets is less than or equal to 1 per meter.

Preferably, the method comprises the following steps: the longitudinal lap seam of each layer of the wood single sheet is less than or equal to 1 per meter.

Novel bamboo wood composite sheet of railway flatcar, because, be equipped with vertical bamboo curtain respectively on the bamboo wood composite sheet, below, set up a plurality of layers of wooden veneer layer in the centre, consequently, make panel have higher intensity above and below, and the centre adopts more multilayer wooden veneer, especially, through controlling the weight ratio control of wooden veneer at 70-80%, the weight control of bamboo curtain is at 20-30%, make its holistic weight can reduce to 700Kg/m3, each layer is through gumming or hot briquetting behind the rubber coating, it both can guarantee the requirement of railway flatcar bottom plate to weight promptly, can also satisfy the requirement of intensity simultaneously, the purpose of replacing camphorwood board preparation railway flatcar bottom plate has been realized. The production cost can be greatly reduced, on one hand, the single wood sheets do not need to become trees, the single wood sheets can be spliced into the board, and meanwhile, the longitudinal bamboo curtains are selected from the upper surface and the lower surface, so that the strength of the board can be ensured, and meanwhile, the cost of the board is also greatly reduced. The number of the layers of the wood single sheets in the middle layer can be increased or decreased according to the requirement of the thickness of the plate.

Further, in order to further improve the strength of the board, the middle layer can use at least 5 wood veneer layers as one wood veneer unit, a layer of longitudinal bamboo curtain is arranged between every two wood veneer units, namely a layer of bamboo curtain is additionally arranged between a plurality of layers of wood veneers, and the static bending strength and the elastic modulus of the board can be further improved.

Novel bamboo wood composite sheet of railway flatcar, the thickness of its wooden single piece and bamboo curtain can select more than or equal to 1mm.

The wood veneer sheets can be in butt joint or lap joint in the longitudinal splicing mode, the flatness of the plates can be guaranteed to be more ideal through the butt joint, the strength of the plates can be better due to the lap joint, the butt joint seams or lap joint seams of the adjacent wood veneer sheets on the same layer are staggered with one another, the butt joint seams or lap joint seams of the adjacent wood veneer sheets on different layers are staggered with one another, and the influence of the lap joint seams or the butt joint seams on the strength of the plates can be eliminated. Preferably, there is less than one lap or butt seam per meter in the longitudinal direction.

The utility model discloses a novel bamboo wood composite sheet of railway flatcar can be made according to following step:

1a, taking moso bamboos growing for more than four years, removing bamboo green and bamboo bones, and then cutting the remaining part of strings into bamboo chips with the thickness of more than 1 mm;

1b, thinning the diameter of the breast, such as: the method comprises the following steps of processing trees with obvious fibers such as pine, birch, eucalyptus, poplar and the like into longitudinal thin wood veneers with the thickness of more than 1mm and the length of more than 0.6m as wood veneer layer materials for later use;

2. connecting bamboo chips larger than 1mm into a longitudinal bamboo curtain with parallel bamboo chips by using fibers;

3. soaking the obtained bamboo curtain in binder doped with insect-killing and moth-proofing agent;

4. drying the treated bamboo curtain to control moisture;

5. after the bamboo curtains which are treated by gum dipping and drying are stacked for 24 hours, two layers of longitudinal bamboo curtains, a plurality of layers of single wood sheets and two layers of longitudinal bamboo curtains are sequentially arranged to form a plate blank of the bamboo-wood composite plate.

6. The slab is pressed to a predetermined thickness by a press at a predetermined pressure and a predetermined temperature.

Known through the detection, have the utility model discloses the novel bamboo wood composite sheet of railway flatcar's of structure density is less than 700Kg/m3, accords with the technical requirement of railway flatcar bottom plate completely.

Drawings

Fig. 1 is a schematic sectional view of a first embodiment of the novel bamboo-wood composite plate of the railway flatcar of the present invention;

FIG. 2 is a schematic view of a longitudinal bamboo curtain structure in the novel bamboo-wood composite board of the railway flatcar of the present invention;

FIG. 3 is a schematic view of a wood veneer layer in the novel bamboo-wood composite board of the railway flatcar of the present invention;

FIG. 4 is a schematic cross-sectional view of a second embodiment of the novel bamboo-wood composite board of the railway flatcar of the present invention;

fig. 5 is a schematic view of a wood veneer layer of a second embodiment of the novel bamboo-wood composite board for a railway flatcar according to the present invention;

fig. 6 is a schematic cross-sectional view of the third embodiment of the novel bamboo-wood composite board of the railway flatcar.

Wherein 1 is a top layer, 11 is a longitudinal bamboo curtain, 2 is a middle layer, 20 is a wood veneer unit, 21 is a wood veneer layer, 22 is a butt seam, 23 is a lap seam, and 24 is a wood veneer; 3 is bottom layer, 5 is heat-resistant nylon thread, 6 is bamboo chip.

Detailed Description

Embodiment 1, refer to fig. 1-3, which show a schematic cross-sectional view of a novel bamboo-wood composite board of a railway flatcar according to the present invention, which includes a top layer 1, a bottom layer 3 and an intermediate layer 2, wherein the top layer 1 and the bottom layer 3 respectively include 5 longitudinal bamboo curtain layers 11; the intermediate layer 2 comprises 70 wood veneer layers 21; and the weight percentage per unit volume of the wood veneer layer 21 is 77.8%; the weight percentage of the unit volume of the longitudinal bamboo curtain is 22.2 percent; the longitudinal bamboo curtain of the top layer 1, the wood veneer layer 21 of the middle layer and the longitudinal bamboo curtain of the bottom layer 3 are sequentially stacked through gum dipping or gluing, and are combined into a whole after hot pressing.

Referring to fig. 2 and 3, the wood veneer layer 21 is formed by longitudinally laying wood veneers 24 with the thickness of 1.5mm, the longitudinal laying means that the length direction of the wood veneers is consistent with the longitudinal direction of the bamboo-wood composite board, the thickness of the longitudinal bamboo curtain is 3mm, and the longitudinal bamboo curtain is woven by the bamboo sheets 6. The wood single sheets 21 adjacent to each layer are butted in the longitudinal direction, and the butt seams 22 are staggered with each other; the longitudinal butt seams 22 of adjacent wood veneers 21 of said layers are offset from each other. And the longitudinal butt joint seam of the wood veneer of each layer is less than or equal to 1/m.

The novel bamboo-wood composite board for the railway flatcar is prepared by the following method:

1a, taking moso bamboos growing for more than four years, removing bamboo green and bamboo bones, and then cutting the rest parts into bamboo chips 6 with the thickness of 3mm and the length of natural length according to a string cutting method. As shown in fig. 2, all bamboo chips 6 with the thickness of 3mm are woven into a longitudinal bamboo curtain 11 by heat-resistant nylon fibers 5;

1b, thinning the diameter of the breast, such as: the trees with obvious fibers such as pine, birch, eucalyptus, poplar and the like are processed into longitudinal wood single sheets 24 with the thickness of 1.5mm to be used as materials of the wood single sheet layers 21 for later use;

2. the Ruidermu FHP-1 insecticidal and mothproof agent is added into the phenolic resin and stirred evenly for standby. Soaking the prepared longitudinal bamboo curtain 11 in phenolic resin for 5 minutes, taking out and draining for 2 minutes, then soaking for 10 minutes again, taking out and draining;

3. drying the longitudinal bamboo curtain 111 soaked with the phenolic resin in the sun; or drying in a drying room;

4. as shown in figure 1, 2 layers of longitudinal bamboo curtains 11-70 layers of wood veneer layers 21-2 layers of longitudinal bamboo curtains 11 are orderly arranged from top to bottom to form a blank board. In this embodiment, the wood veneer layers 21 are laid by longitudinal wood veneers 24 with a thickness of 1.5mm, adjacent wood veneers 24 are butted, and butt seams 22 are staggered with each other. And finally, the above blank plate is hot-pressed to the specified thickness by using a quick-closing press at the temperature of 145 ℃, thereby forming the novel bamboo-wood composite plate of the railway flatcar. And finally, coating a layer of paint on the side surface of the finished plate for corrosion prevention.

In this example, the weight ratio of the wood veneer is 77.8%, and the weight ratio of the longitudinal bamboo curtain is 22.2%. The density is as follows: 680Kg/m < 3 >, and meets the requirement of the bottom plate of the railway flat car on density.

Embodiment 2, referring to fig. 4-5, the new bamboo-wood composite board of another railway flatcar of the present invention is shown in the drawings, which includes: the bamboo curtain comprises a top layer 1, a bottom layer 3 and a middle layer 2, wherein the top layer 1 and the bottom layer 3 respectively comprise 2 layers of longitudinal bamboo curtains; the middle layer 2 comprises 50 wood veneer layers 21, every 5 wood veneer layers 21 form a wood veneer unit 20, and a layer of longitudinal bamboo curtain 11 is arranged between every two wood veneer units 20; the 2 layers of the longitudinal bamboo curtains 11 on the top layer 1, the 10 wood veneer units 20 on the middle layer, the 9 layers of the longitudinal bamboo curtains 11 and the 2 layers of the longitudinal bamboo curtains 11 on the bottom layer 3 are sequentially stacked up through gum dipping or gluing and combined into a whole after hot pressing.

Referring to fig. 4, the wood veneer layer 21 is formed by longitudinally laying wood veneers 24 with the thickness of 1.2mm, the thickness of the wood veneers 24 is 1.2mm, and the longitudinal bamboo curtain 11 is woven by bamboo sheets 6 and has the thickness of 1.5mm. The wood sheets 24 of each layer are arranged in an overlapped mode along the longitudinal direction, the lap joints 23, along the longitudinal direction, of the adjacent wood sheets 24 of each layer are staggered, and the overlapping length of the lap joints 23 ranges from 1 cm to 2cm. And the longitudinal butt seam of each layer of the wood single sheets is less than or equal to 1/m. The preparation method is the same as the first embodiment.

In this example, the weight of the wood veneer is 75.5%, and the weight of the longitudinal bamboo curtain is 24.5%. The density is as follows: 700Kg/m < 3 >, which meets the requirement of the bottom plate of the railway flat car on the density.

Embodiment 3, referring to fig. 6, differs from the previous embodiment in that: the top layer 1 and the bottom layer 3 respectively comprise 3 layers of longitudinal bamboo curtains; the middle layer 2 comprises 64 wood veneer layers 21, each 16 wood veneer layers 21 form a wood veneer unit 20, and a layer of longitudinal bamboo curtain 11 is arranged between every two wood veneer units 20; the 3 layers of the longitudinal bamboo curtains 11 on the top layer 1, the 4 wood veneer units 20 on the middle layer, the 3 longitudinal bamboo curtains 11 and the 3 layers of the longitudinal bamboo curtains 11 on the bottom layer 3 are sequentially stacked up through gum dipping or gluing, and are combined into a whole after hot pressing.

The wood veneer layer 21 is formed by longitudinally laying wood veneers 24 with the thickness of 2.8mm, and the longitudinal bamboo curtain 11 is woven by bamboo chips 6 and has the thickness of 5mm. The wood veneers 24 of each layer are arranged in a butt joint mode along the longitudinal direction, the butt joints 22, along the longitudinal direction, of the adjacent wood veneers 24 of each layer are staggered, and the butt joint seam, along the longitudinal direction, of each wood veneer of each layer is smaller than or equal to 1 per meter. The preparation method is the same as the first embodiment.

In this example, the wood veneer is 80% by weight and the longitudinal bamboo curtain is 20% by weight. The density is as follows: 700Kg/m < 3 >, and meets the requirement of the bottom plate of the railway flat car on density.

It should be noted that, the number of the wood veneer layers 21 can be increased or decreased according to the requirement of the thickness of the board, and the number of the wood veneer layers 21 in the wood veneer unit 20 can also be changed, for example, 10 wood veneer layers are adopted as a unit, and a layer of longitudinal bamboo curtain is added between adjacent units. The number of the longitudinal bamboo curtains in the middle layer 2 is controlled according to the bamboo curtain proportion, and the density of the longitudinal bamboo curtains meets the requirement of the bottom plate of the railway flat car on the density.

The above embodiments are merely illustrative of the present invention, and not restrictive generalizations, the present invention aims to provide a novel bamboo-wood composite board for railway flatcars, wherein the top layer and the bottom layer are both vertical bamboo curtains, the middle layer is basically made of wood veneer layers, and a layer of vertical bamboo curtain can be added before 5 or more wood veneer layers, the weight ratio of the wood veneer is controlled to be 70-80% to reduce the density of the board, so that the density is lower than 700Kg/m3, and a person skilled in the art can make many modifications and replacements in the conventional structure under the guidance of the inventive concept of the present invention, for example: changing the number of layers of the longitudinal bamboo curtains, or changing the number of wood veneer layers in the wood veneer units. Such modifications and substitutions should also be considered to fall within the scope of the present invention.

Claims

1. The utility model provides a novel bamboo wood composite sheet of railway flatcar which characterized in that: the bamboo curtain comprises a top layer, a bottom layer and a middle layer, wherein the top layer and the bottom layer respectively comprise at least 2 layers of longitudinal bamboo curtains; the intermediate layer comprises at least 5 wood veneer layers; and the weight percentage of the unit volume of the wood veneer layer is 70-80%; the weight percentage of the unit volume of the longitudinal bamboo curtain is 20-30%; the longitudinal bamboo curtain on the top layer, the wood veneer layer on the middle layer and the longitudinal bamboo curtain on the bottom layer are sequentially stacked through gum dipping or gluing and are combined into a whole through hot pressing.

2. The novel bamboo-wood composite board of the railway flatcar as claimed in claim 1, characterized in that: at least 5 wood veneer layers in the middle layer form a wood veneer unit, and a layer of longitudinal bamboo curtain is arranged between every two adjacent wood veneer units.

3. The novel bamboo-wood composite board of the railway flatcar as claimed in claim 1 or 2, characterized in that: the thickness of each wood veneer layer is more than or equal to 1mm and less than or equal to 3mm.

4. The novel bamboo-wood composite board of the railway flatcar as claimed in claim 1 or 2, characterized in that: the thickness of the longitudinal bamboo curtain is more than or equal to 1mm and less than or equal to 5mm.

5. The novel bamboo-wood composite plate for the railway flatcar as claimed in claim 1 or 2, characterized in that: the wood veneer layer is formed by longitudinally laying a plurality of wood veneers, the adjacent wood veneers of each layer are longitudinally butted, and the butt joints are staggered with each other; the longitudinal butt seams of adjacent wood veneers of each layer are offset from each other.

6. The novel bamboo-wood composite board of the railway flatcar as claimed in claim 1 or 2, characterized in that: the wood veneer layer is formed by longitudinally laying a plurality of wood veneers, each layer of wood veneers is in lap joint along the longitudinal direction, lap joints of the adjacent wood veneers of each layer along the longitudinal direction are staggered, and the overlapping length of the lap joints is 1-2cm.

7. The novel bamboo-wood composite board of the railway flatcar as claimed in claim 5, characterized in that: the longitudinal butt joint of each layer of the wood single sheets is less than or equal to 1 per meter.

8. The novel bamboo-wood composite board of the railway flatcar as claimed in claim 6, characterized in that: the longitudinal lap seam of each layer of the wood single sheet is less than or equal to 1 per meter.