CN207110345U - A kind of five-layer structure prints solid wooden floor board - Google Patents

Abstract

The application discloses a five-layer structure printed solid wood floor, which sequentially includes a surface board, an upper core board, a core board, a lower core board and a back board that are glued to each other. The surface of the front board is covered with a decorative layer by printing. Cracks are naturally formed on the side of the surface plate that is glued to the upper core board, and the upper core board includes a flat part and a glue nail part that fills the gap, and the flat part and the glue The nails are a natural connection of the same material. It has the characteristics of flat, wrinkle-free and crack-free paint film on the printed decorative surface, good overall structural dimensional stability, safety and environmental protection.

Description

A five-layer structure printed solid wood floor

technical field

The present application relates to the technical field of solid wood floor structure, in particular to a five-layer solid wood floor structure with wood grain printed on the surface.

Background technique

At present, the floors on the market include solid wood flooring, laminate flooring and solid wood composite flooring. Solid wood composite flooring is divided into traditional multi-layer solid wood composite flooring, emerging three-layer solid wood composite flooring and five-layer solid wood composite flooring according to the number of wood layers used. Laminate floors. Solid wood flooring is the most environmentally friendly category among all kinds of wooden flooring, but there are problems such as easy deformation, poor warping resistance, high price and low material utilization rate. Laminate flooring does not feel solid wood, and the amount of adhesive used is large. In addition, many domestic enterprises do not process it properly, and it is easy to produce a large amount of formaldehyde. The indoor pollution is large. If the formaldehyde-free glue is used, the price will be high. Compared with the other two types of flooring, it loses cost-effective advantage. Among the many categories of solid wood composite flooring, multi-layer solid wood composite flooring has many layers, large amount of glue, and poor foot feel; although three-layer solid wood composite flooring has fewer layers, its stability is poor, and it is prone to warping problems.

As a result, five-layer solid wood composite flooring has appeared on the market, which has the foot feel of solid wood flooring, and the total number of glue layers is more than that of solid wood composite flooring, so it has the advantages of environmental protection and comfort. As disclosed in the patent CN200964682Y, the solid wood composite floor has five layers, the grain arrangement direction of the wood material of the first layer, the third layer and the fifth layer is consistent, and the grain arrangement direction of the wood material of the second layer and the fourth layer is the same as that of the first layer. The first, third, and fifth layers intersect, and the better solution is to be perpendicular to each other; the first layer is a wood chip layer, the second, fourth, and fifth layers are veneer layers, and the third layer is a finger-jointed glulam layer. The wood chip layer is sawing slices, the veneer layer is rotary slicing, and the finger-jointed glulam is small splicing pieces. Through the setting of the five-layer structure, the deficiencies of the prior art can be overcome, and it has the characteristics of high strength, strong deformation resistance, high material utilization rate, high cost performance, and safety and environmental protection. In the above technical solution, if the first layer of material (surface board) is made of precious hardwood, it is not conducive to reducing the utilization of precious hard broad-leaved wood and improving the environmental protection of the product. Ordinary fast-growing wood is used as the surface material, and the transfer printing technology that is currently very mature is applied on it, which can meet the requirements of decoration, foot feel, stability, environmental protection and safety at the same time. However, when printing directly on the surface of the fast-growing wood surface material, there will be problems such as wrinkled skin and paint cracking. This is mainly due to the fact that there are a large number of cracks (open or dark cracks) on the positive side of the fast-growing wood rotary-cut veneer with a thickness of about 2mm. ), and wood printing has high requirements on the flatness of the surface of the material. If it is directly glued and compounded without filling, the cracks on the positive side will be reflected in the wrinkling and cracking of the printed paint film on the front.

Utility model content

The purpose of the utility model is to solve the above problems, thereby providing a five-layer printed solid wood floor with smooth paint film on the printed decorative surface, no wrinkles, no cracks, good overall structural dimensional stability, safety and environmental protection.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions: a five-layer structure printed solid wood floor, which successively includes a surface board, an upper core board, a core board, a lower core board and a back board that are glued to each other. The surface of the surface plate is covered with a decorative layer by printing, and a crack is naturally formed on the side of the surface plate that is glued to the upper core plate, and the upper core plate includes a flat layer and glue to fill the crack The nail part, the flat layer part and the rubber nail part are natural connections of the same material. Wherein, "natural connection of the same material" means that the flat part and the nail part are made of the same material, and have an integral structure, and there is no formed connecting surface between them.

As a preference of the above technical solution, the nail portion partially fills the gap, and the flat layer portion and the nail portion are made of the same homogeneous material.

As a preference of the above technical solution, the rubber nail portion completely fills the crack, the upper core plate forms a layered metal modified flat layer portion and a mixed flat layer portion, and the metal modified flat layer portion is attached to The back surface of the front panel (the side of the front panel glued to the upper core panel) is arranged on the surface.

As a preference of the above technical solution, the thickness of the surface board is 1-2 mm, and the core board is eucalyptus finger-jointed board. The wood grain direction of the surface layer, the core layer and the back board is consistent.

As a preference of the above technical solution, the back board is beech, birch or poplar veneer.

As a preference of the above technical solution, the thickness of the flat portion is 0.3-0.5mm.

As a preference for the above technical solution, the upper core board is composed of evenly mixed wood fibers and adhesives; wherein the thickness of the wood fibers is 40 mesh or 50 mesh, and the mass ratio of wood fibers to the adhesive is 80:20 -84:16.

To sum up, the five-layer structure printed solid wood floor of this technical solution has the characteristics of smooth printed decorative surface paint film, no wrinkle, no crack, good dimensional stability of the overall structure, safety and environmental protection.

Description of drawings

Fig. 1 is a kind of schematic diagram of the five-layer structure printed solid wood floor of the utility model embodiment 1;

Fig. 2 is another kind of schematic diagram of the five-layer structure printed solid wood floor of the utility model embodiment 2;

In the figure, 1-surface board, 2-upper core board, 3-core board, 4-lower core board, 5-back board, 21-flat layer part, 22-glue nail part, 2a-metal modified flat layer part , 2b-mixed flat layer section.

Detailed ways

Below in conjunction with accompanying drawing and preferred scheme, the utility model is described in further detail.

Embodiment 1: a five-layer structure printed solid wood floor as shown in Figure 1, which successively includes a surface board 1, an upper core board 2, a core board 3, a lower core board 4 and a back board 5, and the front board 1 It is a eucalyptus string-cut veneer with a thickness between 1-2mm, the core board 3 is a eucalyptus finger joint board with a thickness between 10-15mm, and the lower core board 4 is a eucalyptus planer with a thickness between 1-2mm The veneer is cut, and the backboard 5 is beech, birch or poplar with a thickness of 1-2 mm, which is string-cut or sliced veneer. The direction of the wood grain of the surface board 1, the back board 3 and the back board 5 is consistent, and the lower core board 4 is perpendicular to the wood grain of the above-mentioned three-layer structure. Cracks are naturally formed on the side of the surface plate 1 that is glued to the upper core plate 2. The upper core plate 2 includes a flat part 21 and a glue nail part 22 that fills the gap. For the natural connection of the same material. The glue nail part 22 partially fills the gap, and the flat layer part 21 and the glue nail part 22 are the same homogeneous material. The upper core board 2 is composed of evenly mixed wood fiber and adhesive; the thickness of the wood fiber is 40 mesh or 50 mesh, and the mass ratio of wood fiber to adhesive is 80:20-84:16. In the five-layer structure printed solid wood floor of this technical solution, the material of the upper core board 2 is fiberboard, which mainly plays two roles. 3, to avoid the influence of the uneven structure of the core plate 3 of the finger-jointed material on the surface printing layer of the surface plate 1; , which is mainly used to fill the cracks and avoid wrinkling and cracking of the printed layer on the surface of the panel 1 due to the cracks. Further, there is no formed adhesive layer between the upper core plate 2 and the surface plate 1 and the core plate 3 .

Since the cracks on the back are completely filled, the transfer printing decoration layer attached to the surface of the panel 1 has good flatness, and the decorative effect of the product is beautiful and durable.

The manufacturing method of this kind of five-layer structure printed solid wood floor comprises the following steps:

S1. Cold-press the core board 3, the lower core board 4 and the back board 5 into a composite bottom board. The cold-pressing process can be a general solid wood composite cold-pressing process in the prior art, that is, white latex is used, and the process plan is cold-pressed for 30-40 minutes. ;

S2. Put the bottom plate in the mold, the mold is rectangular, the cross-sectional shape is the same as that of the bottom plate, and the height is equal to or slightly greater than (slightly greater than the allowable error of 5-10mm) the design thickness of the five-layer structure printed solid wood floor; choose 40 mesh or 50 mesh wood fiber, according to 16% sizing amount, mixes glue, obtains the mixed material of wood fiber and adhesive, controls the moisture content of mixed material 35-40%, coats mixed material on core plate 3 surface, and finally place panel 1 on it;

S3. Put the mold loaded with the billet into the press, the hot pressing temperature is 130-160°C, the hot pressing time is 5-10min, and the hot pressing pressure is 1.2MPa-1.5MPa to form the upper core plate 2 with a thickness of 0.3-0.5mm ;

S4. Take it out and let it stand for cooling;

S5. According to the design specifications, sanding, making grooves, etc., and printing a decorative layer on the surface, coating the transparent varnish on the surface of the decorative layer, after curing, complete the production of five-layer structure printed solid wood flooring.

Since the mixture of uncured wood fiber and adhesive has a certain fluidity at a relatively high moisture content, the wood fiber with a smaller mesh number and a higher moisture content of the mixed material are used to further improve its fluidity. . After the mixed material is coated on the surface of the core plate 3, part of the mixed material forms a layered flat portion 21 by pressure, and the other part penetrates into the cracks of the surface plate 1 under pressure to fill the cracks. Therefore, the technical solution greatly improves the working efficiency of filling the surface plate cracks.

Embodiment 2: The difference between embodiment 2 and embodiment 1 is that the glue nail portion 22 completely fills the cracks, and the upper core plate 2 forms a layered metal modified flat layer portion 2a and a mixed flat layer portion 2b, and the metal modified flat layer portion 2b is formed. The layer part 2a is attached to the surface of the back surface of the dial 1 . The metal modified flat layer part 2a is composed of evenly mixed wood fiber, adhesive and iron powder; wherein the thickness of wood fiber is 40 mesh or 50 mesh, and the mass ratio of wood fiber to adhesive is 80:20-84 :16, the added mass of iron powder accounts for 0.08%-0.1% of the total mass.

The difference in the manufacturing steps is that 50-mesh wood fiber is selected, and the glue is mixed according to the sizing amount of 18%, to obtain a mixed material of wood fiber and adhesive, and the moisture content of the first mixed material is controlled to 35-40%. A mixed material is coated on the surface of the core board 3, and the coating amount of the first mixed material is about 0.2 mm; 50 mesh wood fiber is selected, and iron is selected according to the sizing amount of 20% and the mass ratio of 0.08%-0.1%. Powder dosage, control the moisture content of the second mixed material to 35-40%, coat the second mixed material on the first mixed material, the coating thickness of the second mixed material is about 0.1mm; place on it. Make the mold carrying the blank pass through the magnetic field to form a vertical upward magnetic attraction on the surface of the surface 1; the time for the mold carrying the blank under the magnetic field is 20-30s.

Embodiment 3: The difference between Embodiment 3 and Embodiments 1 and 2 is that the surface of the core plate 3 connected to the upper core plate 2 is provided with a plurality of balance grooves perpendicular to its axial direction, so The balance groove is a long groove with a circular arc bottom; the upper core board 2 also includes ribs filling the balance groove.

This specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. After reading this description, those skilled in the art can make modifications to the embodiment without creative contribution according to needs, but as long as it is within the utility model All new claims are protected by patent law.

Claims (6)

1. A printed solid wood floor with a five-layer structure, which sequentially includes a surface board (1), an upper core board (2), a core board (3), a lower core board (4) and a back board (5) that are glued to each other. It is characterized in that: the surface of the surface plate (1) is covered with a decorative layer by printing, a crack is naturally formed on the side of the surface plate (1) glued to the upper core plate (2), and the The upper core board (2) includes a flat layer part (21) and a rubber nail part (22) that fills the gap, and the natural gap between the flat layer part (21) and the rubber nail part (22) is the same material. connect. 2. A five-layer structure printed solid wood floor according to claim 1, characterized in that: the glue nail part (22) partially fills the crack, and the flat layer part (21) and the glue nail Part (22) is the same homogeneous material. 3. A five-layer structure printed solid wood floor according to claim 1, characterized in that: the glue nail part (22) completely fills the crack, and the upper core board (2) forms a layered metal A modified flat layer part (2a) and a mixed flat layer part (2b), wherein the metal modified flat layer part (2a) is attached to the back surface of the surface plate (1). 4. A five-layer structure printed solid wood floor according to claim 1, characterized in that: the thickness of the surface board (1) is 1-2 mm, the core board (3) is eucalyptus finger-jointed board, The wood grain directions of the surface board (1), the core board (3) and the back board (5) are consistent, and the lower core board (4) is perpendicular to the wood grain of the skin board (1) . 5. A five-layer structure printed solid wood floor according to claim 4, characterized in that: the backboard (5) is beech, birch or poplar veneer. 6. The five-layer structure printed solid wood floor according to claim 1, characterized in that: the thickness of the flat part (21) is 0.3-0.5mm.