CN212684928U

CN212684928U - High-performance oriented structural slab composite board

Info

Publication number: CN212684928U
Application number: CN202021387217.XU
Authority: CN
Inventors: 李龙; 王志强; 李桥; 李洁; 王粟旸
Original assignee: Hubei Tianxin Wood Structure House Manufacturing Co ltd
Current assignee: Hubei Tianxin Wood Structure House Manufacturing Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-03-12
Anticipated expiration: 2030-07-15

Abstract

The utility model provides a high performance directional structure board composite board, including 2 kinds of panel, 2 panels are the HOSB board on odd number layer and the wood saw material board on even number layer respectively, and every layer of wood saw material board includes that two isosceles right triangle shaped plates and a set of base angle are 45 isosceles trapezoid shaped plate, and the direction of the wood saw material board on adjacent even number layer each other is 90, and the HOSB board and the wood saw material board on adjacent even number layer pass through the gluing agent bonding. The utility model provides a pair of high performance directional structure board composite board has improved the plywood and has arranged direction and plywood inter-connection mode, promotes material width direction mechanical properties by a wide margin, reduces material mechanical properties at length and width direction discrepancy to promote the whole shear of material and bending resistance mechanical properties.

Description

High-performance oriented structural slab composite board

Technical Field

The utility model relates to a high performance directional structure board composite board belongs to engineering wood product technical field.

Background

Orthogonal laminated wood (CLT) is a factory-prefabricated engineered wood product in the form of rectangular, linear, planar boards, which is formed by at least orthogonal assembly of 3 layers of solid wood sawn timber or structural composite boards and pressing by using a structural adhesive. The CLT can be directly used as a floor slab, a roof slab and a wall slab which are born in a wood structure building, and the CLT material is produced, so that the production and development of middle-high-rise wood structure buildings are promoted.

The grain angle between adjacent plies of the CLT is typically 90 °, and since the transverse shear properties of wood are much lower than the longitudinal shear modulus, e.g. the transverse shear modulus is about 1/10, the transverse plies in the middle of the CLT are susceptible to rolling shear failure when the CLT is subjected to out-of-plane loading as a floor panel (see fig. 1), and thus the rolling shear properties are key mechanical properties of the CLT as a floor panel. In addition, in addition to roll shear failure, wood often has natural defects such as knots, and the bottom ply is also prone to tensile failure at the knots when the CLT is bent, thereby reducing the CLT bending resistance. Moreover, because the mechanical properties of the wood with grain and cross grain are different, for example, the transverse elastic modulus of the wood is about 1/30, the difference of the mechanical properties of the CLT slab in the length direction and the width direction is directly large, and a major axis (namely the length direction) of the mechanical properties and a minor axis (the width direction) of the mechanical properties exist, and the application of the CLT material is limited due to the large difference.

A sandwich-type multi-layer wood structure layer of CLT-OSB- … … -CLT is also currently available on the market, as shown in fig. 2, in an attempt to improve the strength of the panel. However, the OSB laminate and the solid wood laminate (SPF laminate) of the board are both of single-layer structures, the laying angles of the layers are still 90 degrees, and the improvement of the bending strength and the shearing strength is not facilitated.

Disclosure of Invention

In order to solve the defects of the prior art, the utility model provides a high-performance directional structural slab composite board, which not only has the advantages of good dimensional stability, wide raw material source (rapid growth poplar branch material can be adopted) and the like, but also disperses the defects of knots and the like in the production process, and the mechanical property of the product is more homogeneous; the wood chip laying angle can be adjusted in the production process, so that the mechanical properties of the plate blank in the length direction and the width direction are closer, and the transverse elastic modulus is about 1/4, thereby greatly improving the mechanical properties of the material in the width direction, reducing the difference of the mechanical properties of the material in the length direction and the width direction and improving the overall shear resistance and bending resistance of the material.

The utility model discloses a solve the technical scheme that its technical problem adopted and be: the utility model provides a high performance directional structure board composite board, including 2 kinds of panel, 2 panels are the HOSB board of odd number layer and the solid wood sawn timber board of even number layer respectively, and every layer of solid wood sawn timber board includes that two isosceles right triangle shaped plates and a set of base angle are 45 isosceles trapezoid shaped plate, and the direction of the solid wood sawn timber board of adjacent even number layer each other is 90, and the HOSB board and the solid wood sawn timber board of adjacent even number layer pass through the gluing agent bonding.

The adhesive is single-component polyurethane adhesive, and the single-side gluing amount is 180-280 g/m²。

Every layer of adjacent solid wood sawn timber board is connected through the nail, and the nailing direction of nail is the same with the high direction of this layer of isosceles right triangle shaped board and isosceles trapezoid shaped board.

In the solid wood saw material plate of each layer, the height of the isosceles right triangle plate and the height of the isosceles trapezoid plate are the same.

Each layer of solid wood saw material plate also comprises 1 to 2 pentagonal special-shaped plates, wherein one angle of each pentagonal special-shaped plate is a right angle, one angle of each pentagonal special-shaped plate is 45 degrees, and the other three angles of each pentagonal special-shaped plate are 135 degrees.

In the solid wood saw material board of every layer, the height of isosceles right angle triangle-shaped board, isosceles trapezoid board and pentagonal dysmorphism board is all the same.

The utility model discloses based on the beneficial effect that its technical scheme had lies in:

(1) the utility model discloses there is great difference at product length and width direction to ordinary CLT material mechanical properties, and when receiving the off-plate loading, the easy roll shear destruction that takes place of its middle horizontal layer plywood, and the tensile destruction takes place for the bottom layer plywood easily at the festival department, lead to CLT material can not resist two-way mechanical properties well and bending resistance mechanical properties low grade shortcoming, laminate arrangement direction and the inter-plywood connected mode have been improved, promote material width direction mechanical properties by a wide margin, reduce material mechanical properties at length and width direction difference and promote the whole shearing of material and bending resistance mechanical properties;

(2) the utility model discloses a 45 crisscross group blank structure to and two kinds of plywood connected mode (adhesive connection and 45 degrees oblique nail connection), with the multilayer high performance directional structure board composite board of a plurality of layers HOSB boards and the range upon range of HOSB board-wood sawn timber board- … -HOSB board of wood sawn timber range upon range of formation, the HOSB board sets up in the superiors and the lowest floor of monolithic board, avoid the HOSB board to take place to cut and destroy and reduce material mechanical properties, wood sawn timber layer is according to 45 degrees group blank, can change shear stress and wood grain contained angle, promote shear resistance;

(3) the utility model can adopt 45-degree inclined nail connection, so that the nail can exert both the shear resistance and the tensile resistance, the shear resistance of the material is improved, meanwhile, the nail connection can fix the solid wood sawn timber, and the wood laminate is prevented from sliding when being pressed;

(4) the utility model has the advantages that the heights of all layers of solid wood sawn timber boards are the same, the batch processing is easy, and the work efficiency is improved;

(5) experiments prove that compared with the common structure solid wood sawn timber CLT material, the bending resistance and the shearing resistance of the high-performance directional structural slab composite board prepared by the utility model are improved by more than 120 percent and 80 percent in the length direction; the bending resistance and the shearing resistance in the width direction are improved by more than 200 percent and 400 percent, and the improvement effect is obvious.

Drawings

Fig. 1 is a schematic diagram of a conventional CLT rolling shear failure phenomenon.

Fig. 2 is a schematic diagram of a sandwich-type multi-layer wood structure layer in the prior art.

Figure 3 is a schematic view of a 3-layer high performance oriented strand board composite.

Figure 4 is a schematic view of a 5-layer high performance oriented strand board composite board.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

The utility model provides a high performance directional structure board composite board, refer to fig. 3 and fig. 4, including 2 kinds of panel, 2 panels are the HOSB board on odd number layer and the wood saw board on even number layer respectively, and every layer of wood saw board includes that two isosceles right triangle shaped plates and a set of base angle are 45 isosceles trapezoid shaped plate, and the direction of the wood saw board on adjacent even number layer each other is 90, and the HOSB board and the wood saw board on adjacent even number layer pass through the gluing agent bonding.

The utility model provides a pair of high performance directional structure board composite board is through following step processing:

(1) preparing materials: cutting the HOSB layers and the solid wood sawn timber layers, wherein the HOSB layers are integral HOSB plates cut into rectangles, the solid wood sawn timber layers are solid wood sawn timber plates spliced into rectangles, and each layer of solid wood sawn timber plate comprises two isosceles right triangle plates and a group of isosceles trapezoid plates with the bottom angles of 45 degrees;

(2) controlling and processing the moisture content of the laminate: controlling the water content of each layer of HOSB plate and each layer of solid wood sawn timber plate to be 8-19%;

(3) gluing: gluing the single side of the plate by using an adhesive;

(4) assembling and nailing connection: laying and assembling according to the layers with odd layers of HOSB plates and even layers of solid wood saw plates, wherein adjacent solid wood saw plates of each layer of solid wood saw plates are connected through nails, the nailing direction of the nails is the same as the height direction of the isosceles right triangle plate and the isosceles trapezoid plate, and the directions of the solid wood saw plates of the adjacent even layers are 90 degrees;

(5) four-side pressurization: and pressing the assembled and nailed and connected plate blanks up and down and two side surfaces, wherein the two side surfaces are front and back surfaces or left and right surfaces.

With the wood sawn timber CLT of common structure with the utility model discloses gained high performance directional structure board composite board contrasts, obtains following data:

the ratio of the shearing resistance bearing capacity of the common-structure solid wood sawn timber CLT in the width direction to the length direction is 0.4 to 0.5, and the ratio of the shearing resistance bearing capacity of the material related to the utility model in the width direction to the length direction is 0.8 to 0.9; on the other hand, the bending resistance bearing capacity of ordinary structure wood sawn timber CLT material is 0.1 to 0.4 at width and length direction ratio, the utility model relates to a bending resistance bearing capacity of material is 0.8 to 0.9 at width and length direction ratio. Generally speaking, the utility model relates to a mechanical properties of material is at the difference greatly reduced of two directions.

In addition, compared with the common structure solid wood sawn timber CLT material, the bending resistance and the shearing resistance of the material in the length direction of the utility model are improved by more than 120 percent and 80 percent; the bending resistance and the shearing resistance in the width direction are improved by more than 200 percent and 400 percent.

The utility model provides a pair of high performance directional structure board composite board has improved the plywood and has arranged direction and plywood inter-connection mode, has promoted material width direction mechanical properties by a wide margin, has reduced material mechanical properties at length and width direction discrepancy and promote the whole shear of material and bending resistance mechanical properties.

Claims

1. The utility model provides a high performance directional structure board composite board, includes 2 kinds of panel, its characterized in that: the 2 plates are respectively odd-layer HOSB plates and even-layer solid wood sawn plates, each layer of solid wood sawn plate comprises two isosceles right-angle triangular plates and a group of isosceles trapezoid plates with the bottom angles of 45 degrees, the directions of the adjacent even-layer solid wood sawn plates are 90 degrees, and the adjacent even-layer HOSB plates and the solid wood sawn plates are bonded through adhesives.

2. The high performance oriented strand board composite of claim 1, wherein: the adhesive is single-component polyurethane adhesive, and the single-side gluing amount is 180-280 g/m²。

3. The high performance oriented strand board composite of claim 1, wherein: every layer of adjacent solid wood sawn timber board is connected through the nail, and the nailing direction of nail is the same with the high direction of this layer of isosceles right triangle shaped board and isosceles trapezoid shaped board.

4. The high performance oriented strand board composite of claim 1, wherein: in the solid wood saw material plate of each layer, the height of the isosceles right triangle plate and the height of the isosceles trapezoid plate are the same.

5. The high performance oriented strand board composite of claim 1, wherein: each layer of solid wood saw material plate also comprises 1 to 2 pentagonal special-shaped plates, wherein one angle of each pentagonal special-shaped plate is a right angle, one angle of each pentagonal special-shaped plate is 45 degrees, and the other three angles of each pentagonal special-shaped plate are 135 degrees.

6. The high performance oriented strand board composite of claim 5, wherein: in the solid wood saw material board of every layer, the height of isosceles right angle triangle-shaped board, isosceles trapezoid board and pentagonal dysmorphism board is all the same.