Core layer plate

Abstract

The utility model relates to a core layer board, and belongs to the technical field of core boards. The core layer plate comprises a plurality of groups of battens and a plurality of bamboo canes, and the bamboo canes are arranged between any two adjacent groups of battens. According to the utility model, the bamboo canes are introduced into the core plate, so that the longitudinal static bending intensity of the core plate is obviously enhanced; therefore, the problem that the core-board is easy to deform due to external force is solved; in a preferable scheme, the arrangement direction of wood fibers of the wood battens is perpendicular to the length direction of the battens, the transverse static bending intensity of the core board is enhanced, the overall strength of the core board is improved, and the core board is not prone to deformation when subjected to external force; according to the preferable scheme, stress grooves are formed in the two faces of the core layer board, board internal stress generated under the conditions of water content, hot pressing in the production process and the like is released, therefore, the board face bending problem is avoided, and data detection of the edge straightness, the perpendicularity and the board face flatness all reach the GB / T-34722 standard.

Description

Technical Field

[0001] The utility model relates to a core layer board and belongs to the technical field of blockboards. Background Art

[0002] Blockboard usually includes a core board and 1~2 layers of veneer arranged on both surfaces of the core board; the core board is made of wood strips or wood chips. It has the general characteristics of solid wood boards, so it has a high market acceptance and is often used in furniture making.

[0003] The invention patent with publication number CN 106113166 B discloses a method for preparing a blockboard substrate ecological board by steaming curing, and also discloses a method for preparing a core board for blockboard, specifically: splicing wood strips with a length of 20-60 cm, a width of 4-5 cm, a thickness of 10-12 mm, and a moisture content of 7-9% into a core board; filling and smoothing the scars, holes, gaps, and depressions on the surface of the core board with putty, and sanding the core board after the putty is dried; placing the core board in a heat treatment kiln, passing steam, and curing the core board for 100-140 minutes at a temperature of 55-65°C and a humidity of 70-80%; after taking out the core board, filling the depressed areas with putty, and sanding the core board again after the putty is dried; the putty is mixed with urea-formaldehyde resin, talcum powder, white flour, and wood powder in a mass ratio of (11-13): (5-7): (3-5): 1. The above core boards are the same as the core boards of traditional blockboards, mostly made of fast-growing materials, with a soft texture and easily deformed by external forces. Utility Model Content

[0004] The utility model aims to solve the above problems, thereby providing a core board for blockboard. The core board for blockboard of the utility model is formed by wood boards and bamboo strips arranged at intervals, and has the advantage of high static bending strength.

[0005] The technical solution of the utility model to solve the above problems is as follows:

[0006] A core layer board comprises a plurality of groups of laths and a plurality of bamboo strips; the bamboo strips are arranged between any two adjacent groups of laths.

[0007] As a preferred embodiment of the above technical solution, each group of slats is formed by splicing a plurality of slats.

[0008] As a preferred embodiment of the above technical solution, the joint seams of any two adjacent groups of slats are staggered.

[0009] As a preferred embodiment of the above technical solution, the bamboo strips are arranged sideways; the width of the bamboo strips is matched with the thickness of the strip board.

[0010] As a preferred embodiment of the above technical solution, the slats and bamboo strips are irradiated by gamma rays with an irradiation dose of 25-35 KGy.

[0011] As a preferred embodiment of the above technical solution, the arrangement direction of the bamboo fibers of the bamboo strip is consistent with the length direction of the bamboo strip.

[0012] As a preferred embodiment of the above technical solution, a plurality of stress grooves are arranged transversely through two surfaces of the core layer plate; and the stress grooves are evenly arranged.

[0013] As a preferred embodiment of the above technical solution, the stress groove is a straight groove.

[0014] As a preferred embodiment of the above technical solution, the stress grooves on the two surfaces of the core layer plate are staggered.

[0015] As a preferred embodiment of the above technical solution, the width of the stress groove is about 1-1.5 mm, and the depth is about 2-3 mm.

[0016] As a preferred embodiment of the above technical solution, both side edges of the core layer board in the length direction are sealed by the bamboo strips.

[0017] As a preferred embodiment of the above technical solution, the arrangement direction of the wood fibers of the strips is perpendicular to the length direction of the strips.

[0018] As a preferred embodiment of the above technical solution, the strip is 20-30 cm long, 4-6 cm wide and 1.1-1.3 cm thick; the length of the bamboo strip is equal to that of the core board, and the width is equal to the thickness of the strip, which is 0.4-0.6 cm.

[0019] In summary, the utility model has the following beneficial effects:

[0020] 1. The utility model introduces bamboo strips into the core board, which significantly enhances the longitudinal static bending strength of the core board; thus solving the problem that the blockboard is easily deformed by external force;

[0021] 2. In the preferred embodiment of the present invention, the wood fiber arrangement direction of the wooden strip is perpendicular to the length direction of the strip, which enhances the transverse static bending strength of the core board, improves the overall strength of the blockboard, and is less likely to deform when subjected to external force;

[0022] 3. In the preferred solution of the utility model, stress grooves are opened on both sides of the core layer board to release the internal stress of the board caused by moisture content, hot pressing during production, etc., thereby avoiding the problem of board bending. The edge straightness, verticality and board flatness data detection all meet the GB / T-34722 standard;

[0023] 4. The utility model uses gamma rays to irradiate wood, destroying the hydroxyl hydrophilic groups in the wood and reducing the water absorption rate of the board; after radiation cross-linking, the bonding performance of the fiber and polymers such as hemicellulose is improved, the crystallinity is increased, and the bending strength is strengthened;

[0024] 5. The core board of the utility model is not only suitable for traditional blockboards, but also suitable for impregnated film paper veneer blockboards and UV veneer blockboards. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a top view of the core layer board of Example 1 of the utility model;

[0026] Figure 2 yes Figure 1 An end view of

[0027] Figure 3 It is a top view of the core layer board of Example 2 of the utility model;

[0028] Figure 4 It is a structural schematic diagram of a three-layer blockboard prepared by using the core layer board of the utility model;

[0029] In the figure, 1-core board, 2-veneer board;

[0030] 11-lath, 12-bamboo strip, 11-1-slat board, 11-2-slat board joint, 11-3-stress groove. DETAILED DESCRIPTION

[0031] The present invention is further explained below in conjunction with the accompanying drawings.

[0032] The following specific implementation methods are merely explanations of the present invention, not limitations of the present invention. Any changes made by those skilled in the art after reading the specification of the present invention will be protected by patent law as long as they are within the scope of the claims.

[0033] Embodiment 1

[0034] like Figure 1~2 As shown, a core layer board 1 is composed of board strips 11 and bamboo strips 12.

[0035] The slats 11 are composed of slats. Figure 1As shown, each slat 11-1 has the same width, and multiple slats 11-1 are spliced ​​end to end to form the slat 11, and there is a slat splicing seam 11-2 between the ends of two adjacent slats 11-1, which is specifically a finger seam. There are two types of slats 11, and the two types of slats are arranged alternately. In the first type of slats 11, the length of the slats at the end (slat A) is half the length of the middle slat (slat B); in the second type of slats, the lengths of the slats are the same (all are slats B), so that the adjacent finger seams on the slats 11 can be staggered.

[0036] The bamboo strips 12 are an essential component of the core board 1 of this embodiment. Figure 1 As shown, the length of the bamboo strip 12 is the same as that of the core board 1, and the bamboo fiber arrangement direction of the bamboo strip 12 is parallel to the length direction of the core board 1. In this embodiment, the bamboo strip 12 is 2.5m long, 1.2cm wide and 5mm high.

[0037] The slats 11 and bamboo strips 12 of the core layer board 1 are arranged at intervals, that is, one bamboo strip 12 is arranged between any two adjacent groups of slats 11. The two sides of the core layer board in the length direction are sealed by the bamboo strips 12.

[0038] The wood fibers of each strip 11-1 are arranged in the same direction, so that the arrangement direction of the wood fibers of the strips 11 is also consistent. Figure 1 As shown, in this example, the wood fiber arrangement direction of the strip 11 is parallel to the width direction of the core board 1 and perpendicular to the length direction of the core board 1. The strip 11 is 2.5 m long, 5 cm wide and 1.2 cm high.

[0039] from Figure 1~2 It can be seen that the bamboo strips 12 are arranged sideways, so their width is equal to the height of the slats 11, both of which are 1.2 cm.

[0040] like Figure 1 and Figure 4 As shown, a plurality of stress grooves 11 - 3 are transversely arranged on the two surfaces of the core layer plate; the stress grooves 11 - 3 are evenly arranged; and the stress grooves 11 - 3 on the two surfaces of the core layer plate are staggered.

[0041] The core layer board 1 is prepared by the following method:

[0042] S1. Process fast-growing wood into 24 strips A and 218 strips B, where strips A are 12.5 cm long, 5 cm wide and 1.2 cm thick, and strips B are 25 cm long, 5 cm wide and 1.2 cm thick; used to form 12 groups of first-type strips and 11 groups of second-type strips; each group of first-type strips consists of 9 strips B and 2 strips A, and each group of second-type strips consists of 10 strips B;

[0043] S2, cutting the bamboo into 24 bamboo strips, each bamboo strip is 250 cm long, 1.2 cm wide, and about 0.5 cm thick after grinding;

[0044] S3, opening finger joint grooves at one end of all the strips A, selecting 22 strips B to open finger joint grooves at one end, and opening finger joint grooves at both ends of the remaining strips B; then applying wood glue in the finger joint grooves, and finger-joining the strips to form 12 groups of first type strips and 11 groups of second type strips of the same length as the bamboo strips;

[0045] S4, applying glue to the slats and bamboo strips, and then assembling the slats and bamboo strips on the board of the board assembly machine. When assembling, the slats are laid flat, the bamboo strips are placed sideways, and the slats are placed side by side in a cycle order of bamboo strips-first type slats-bamboo strips-second type slats-bamboo strips-first type slats-bamboo strips-second type slats-bamboo strips; after assembling, the blank is sent into the pressing groove of the press to apply lateral pressure to the blank, and after pressing, the blank is laid flat and conveyed in a placement manner perpendicular to the conveying direction, and then trimmed to cut off the excess parts at both ends of the core layer board, and then sent into an oven, and dried to form the core layer board;

[0046] S5, on both surfaces of the core plate Figure 4 As shown, a stress groove 11-3 is provided.

[0047] To make the core board 1 of this embodiment into a blockboard, at least one veneer needs to be arranged on each of the upper and lower surfaces.

[0048] In this embodiment, Figure 4 The viewing angle is side view. Figure 4 As shown, a blockboard comprises a core board 1 and two veneers 2 covering the upper and lower surfaces of the core board 1. The core board 1 and the two veneers 2 are connected by hot pressing and gluing. The wood fibers of the veneers 2 are arranged in a transverse direction.

[0049] Depend on Figure 1 It can be seen that the wood fiber of the core board 1 is arranged in a horizontal direction, parallel to the width direction of the blockboard; but the fiber of the bamboo strips 12 of the core board 1 is arranged in a longitudinal direction, parallel to the length direction of the blockboard. Therefore, in this example, the strength of the blockboard in the length direction is mainly provided by the bamboo strips 12. The strength in the width direction is provided by the veneer 2 and the strips 11.

[0050] In this embodiment, the veneer 2 is a eucalyptus peeled veneer with a thickness of about 2 mm.

[0051] The core layer board 1 has a thickness of about 1.2 cm.

[0052] Embodiment 2

[0053] The only difference from Example 1 is that Figure 3 As shown, the fiber arrangement directions of the plank 11 and the bamboo strip 12 are the same, and are both parallel to the length direction of the core layer board.

[0054] Therefore, in this example, the strength of the blockboard in the length direction is provided by the bamboo strips 12 and the planks 11. The strength in the width direction is provided by the single board 2.

[0055] Embodiment 3

[0056] The only difference from Example 1 is that the stress grooves are not provided on the two surfaces of the core layer plate.

[0057] Embodiment 4

[0058] The only difference from Example 2 is that the stress grooves are not provided on the two surfaces of the core layer plate.

[0059] Embodiment 5

[0060] The only difference from Example 1 is that the slats and bamboo strips are irradiated by gamma rays with an irradiation dose of 30 KGy.

[0061] Embodiment 6

[0062] The only difference from Example 2 is that the slats and bamboo strips are irradiated by gamma rays with an irradiation dose of 30 KGy.

[0063] Comparative Example 1

[0064] The only difference from Example 1 is that:

[0065] 1. The bamboo strips are not provided;

[0066] 2. The fiber arrangement direction of the veneer 2 is parallel to the width direction of the blockboard, and the fiber arrangement direction of the core layer board 1 is parallel to the length direction of the blockboard.

[0067] Therefore, in this example, the strength of the blockboard in the length direction is provided by the strips 11 , and the strength in the width direction is provided by the single board 2 .

[0068] The blockboards of Examples 1 to 5 and Comparative Example 1 were tested according to GB / T-34722, and the test results are shown in the following table.

[0069] Longitudinal static bending strength Longitudinal elastic modulus Transverse static bending strength Transverse elastic modulus Example 1 31 3157 43.3 3009 Example 2 36 3736 33 2981 Example 3 37 3427 39.3 3078 Example 4 44 3035 31.2 3039 Example 5 50 4029 41.3 3131 Example 6 51 4012 28.9 2905 Comparative Example 1 24.3 2089 9.59 1417

[0070] Edge straightness mm / m Verticality mm / m Flatness% Example 1 0.3 0.4 0.2 Example 2 0.4 0.3 0.3 Example 3 0.6 0.6 0.7 Example 4 0.7 0.6 0.6 Example 5 0.4 0.3 0.3 Example 6 0.3 0.3 0.3 Comparative Example 1 0.8 0.9 0.7

Claims

1. A core board, comprising a plurality of groups of strips (11); characterized in that: It also includes a plurality of bamboo strips (12); the bamboo strips (12) are arranged between any two adjacent groups of strips; Each group of the slats (11) is formed by splicing a plurality of slats (11-1); The strip board joint seams (11-2) of any two adjacent groups of strips (11) are staggered; The slats and bamboo strips are irradiated by gamma rays, with an irradiation dose of 25-35 Kgy; A plurality of stress grooves (11-3) are arranged transversely through the two surfaces of the core layer plate; the stress grooves (11-3) are evenly arranged; The stress groove (11-3) is a straight groove; The stress grooves on the two surfaces of the core plate are arranged alternately; The wood fibers of the slats (11) are arranged in a direction perpendicular to the length direction of the slats (11); The arrangement direction of the bamboo fibers of the bamboo strip (12) is consistent with the length direction of the bamboo strip (12); The bamboo strips (12) are arranged sideways; the width of the bamboo strips (12) is adapted to the thickness of the strip board (11-1).

2. A core board according to claim 1, characterized in that: Both side edges of the core layer board in the length direction are sealed by the bamboo strips.

3. A core board according to claim 1, characterized in that: The strip board (11-1) is 20-30 cm long, 4-6 cm wide and 1.1-1.3 cm thick; the length of the bamboo strip is the same as that of the core board, and the width is equal to the thickness of the strip board, which is 0.4-0.6 cm thick.

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