CN217072695U

CN217072695U - Plywood sheet

Info

Publication number: CN217072695U
Application number: CN202122123366.6U
Authority: CN
Inventors: 郑宪富
Original assignee: Shandong Fengtai Wood Co ltd
Current assignee: Shandong Fengtai Wood Co ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2022-07-29
Anticipated expiration: 2031-09-03

Abstract

The application discloses a plywood, which belongs to the field of boards and comprises an ultra-flat core board, wherein the ultra-flat core board is positioned at the center of the plywood; the downward maximum board surface of the panel is horizontally attached to the upward maximum board surface of the ultra-flat core board, and the length direction of the panel is consistent with that of the ultra-flat core board; the upward maximum board surface of the back board is horizontally attached to the downward maximum board surface of the ultra-flat core board, and the length direction of the back board is consistent with that of the ultra-flat core board; and at least two wood fine materials are respectively attached and connected to the upper surface of the panel and the lower surface of the back plate in the same way as the panel and the back plate are attached and connected with the super-flat core plate. The utility model provides a panel adopts solid wood board for the plywood surface of making is more for leveling, has the face crack prevention characteristic, has solved the problem of the surface fracture that high-grade furniture board roughness and different weather caused.

Description

Plywood sheet

Technical Field

The application relates to the field of plates, in particular to a plywood.

Background

The plywood is one of indispensable artificial boards in the production of modern wood products, the building industry, the packaging industry, the vehicle and ship manufacturing industry and the like, the industrial production of the plywood meets the requirement of saving and efficiently utilizing wood, the plywood industry is rapidly developed and especially reformed due to good physical and mechanical properties, the cross-over development of the plywood industry is realized, and four plywood industry clusters of Hebei, Jiangsu, Shandong, Zhejiang and the like are formed nationwide. The plywood has the advantages of small deformation, large breadth, convenient construction, good transverse grain tensile property and the like, so that the application field of the plywood is more and more extensive, and the plywood has wide market and development prospect along with the stable development of the industries such as furniture, building, vehicle and ship manufacturing, packaging and the like in China and the continuous expansion of the application field and the international market of the plywood.

In the production process of the plywood, the existing process has the disadvantages of large processing amount, multiple operation procedures, high quality control difficulty and unstable quality. The defects that the plate surface is not smooth enough, the peeling and the glue opening are easy to occur in the using process, the plate surface is easy to crack in a dry area and the like are more in problems.

SUMMERY OF THE UTILITY MODEL

Objects of the invention

The plywood comprises an ultra-flat core plate, wherein the ultra-flat core plate is positioned at the center of the plywood; the downward maximum board surface of the panel is horizontally attached to the upward maximum board surface of the ultra-flat core board, and the length direction of the panel is consistent with that of the ultra-flat core board; the upward maximum board surface of the back board is horizontally attached to the downward maximum board surface of the ultra-flat core board, and the length direction of the back board is consistent with that of the ultra-flat core board; and at least two wood fine materials are respectively attached and connected to the upper surface of the panel and the lower surface of the back plate in the same way as the panel and the back plate are attached and connected with the super-flat core plate. The utility model provides a panel adopts solid wood board for the plywood surface of making is more for leveling, has the face crack prevention characteristic, has solved the problem of the surface fracture that high-grade furniture board roughness and different weather caused.

(II) technical scheme

In order to solve the above problems, the present application provides a plywood prepared according to the preparation method of the plywood, comprising: the super-flat core plate is positioned in the center of the plywood; the upward maximum board surface of the super-flat core board is horizontally attached and connected with the downward maximum board surface of the panel, and the length direction of the panel is consistent with that of the super-flat core board; the upward maximum board surface of the back board is horizontally attached to the downward maximum board surface of the ultra-flat core board, and the length direction of the back board is consistent with that of the ultra-flat core board; the maximum board surface of one wood fine material facing downwards is attached to the maximum board surface of the panel facing upwards, the maximum board surface of the other wood fine material facing upwards is attached to the maximum board surface of the back panel facing downwards, and the length directions of the at least two wood fine materials are consistent with the length direction of the super-flat core board.

Furthermore, the ultra-flat core plate is a forward vertical floor plate and comprises at least two laths; each plank is sequentially provided with a first plank, a second plank and a first plank which are equal in height with the first plank; the first wood board, the second wood board and the first wood board are arranged in sequence, the first wood board, the second wood board and the first wood board are parallel in pairs and are connected in a maximum board surface fitting mode, the minimum board surface of any wood board in the length direction is connected with the maximum board surface of the panel in a fitting mode, the plane where the maximum board surface of any wood board is located is perpendicular to the plane where the maximum board surface of the panel is located, and the length direction of any wood board is consistent with the length direction of the panel.

Furthermore, the super-flat core plate is a crossed vertical floor plate and comprises at least two laths; each plank is sequentially provided with a first plank, a second plank and a first plank which are equal in height with the first plank; the first wood board, the second wood board and the first wood board are arranged in sequence, the first wood board, the second wood board and the first wood board are parallel in pairs, the maximum board surfaces are connected in a fitting mode, the minimum board surface in the length direction of any one wood board is connected with the maximum board surface of the panel in a fitting mode, the plane where the maximum board surface of any one wood board is located is perpendicular to the plane where the maximum board surface of the panel is located, and the length direction of any one wood board is consistent with the length direction of the panel; the second wood board comprises at least two third wood boards, the minimum board surfaces in the length directions of the at least two third wood boards are connected in a fitting mode, the maximum board surfaces of the at least two third wood boards are parallel to and connected with the maximum board surface of the first wood board in a fitting mode, and the length directions of the at least two third wood boards are perpendicular to the length direction of the first wood board.

Furthermore, the super-flat core board is a crossed multilayer board substrate and comprises at least two fourth boards, and the length directions of the at least two fourth boards are consistent with the length direction of the face board; the upward maximum surface of one fourth wood board is parallel to and attached to the downward maximum surface of the panel; the downward maximum surface of the other fourth wood board is parallel to and jointed with the upward maximum surface of the panel; the at least two fifth wood boards are arranged between the at least two fourth wood boards and are in fit connection; each fifth wood board keeps horizontally rotating for 90 degrees between at least two fourth wood boards, so that the length direction of each fifth wood board is vertical to the length direction of the fourth wood boards; the minimum board surfaces of every fifth board in the length direction are jointed and connected in pairs.

Furthermore, the super-flat core plate is provided with at least two battens; the heights of at least two wood strips are equal, and the two wood strips are jointed and connected in pairs along the length direction of the wood strips, and the length direction of the wood strips is consistent; the length direction of the wood strips is consistent with the length direction of the panel.

Further, the panel, the back panel and the ultra-flat core board are selected from one of poplar, maple, pine, cherry, birch, eucalyptus, fir, tung, basswood, beech, teak, oak, camphorwood and willow.

Furthermore, the thickness of the panel and the back plate is 0.1-10mm respectively; the thickness of the super-flat core plate is 1-50 mm.

Further, the thickness of the wood fines is 5-500 filaments.

Further, the adhesive for bonding connection is selected from urea-formaldehyde glue, formaldehyde-free glue, acid-formaldehyde glue, soybean glue and/or MDI glue.

Furthermore, the plywood is applied to the manufacturing of high-grade furniture doors and boards and engineering decoration.

(III) advantageous effects

The technical scheme of the application has the following beneficial technical effects: the plywood is made of solid wood, so that the surface of the plywood is smoother; the ultra-flat core plates have various types, and can generate force in the horizontal direction or the longitudinal direction, so that the occurrence of plate surface cracking caused by excessive force in a certain direction is reduced. Meanwhile, the outer surface of the plywood is made of wood fine materials, the materials are more delicate and compact relative to wood veneers, and the problem of surface cracking caused by the flatness of high-grade furniture boards and different weather is solved.

Drawings

FIG. 1 is a schematic side view of a plywood panel according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of a core structure according to an embodiment of the present application;

FIG. 3 is a cross-sectional view of a core plate structure according to another embodiment of the present application;

FIG. 4 is a block diagram of an ultra-flat core board according to yet another embodiment of the present application.

Reference numerals: 1-super flat core board, 10-lath, 101-first wood board, 102-second wood board, 1021-third wood board, 11-fourth wood board, 12-fifth wood board, 13-lath, 131-wood block, 2-face board, 3-back board and 4-wood fine material.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to the accompanying drawings in combination with the detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present application. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present application.

It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The disclosure of the present application may be understood more readily by reference to the following detailed description of preferred embodiments of the application and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In case of conflict, the present specification, including definitions, will control.

The term "prepared from …" as used herein is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

The conjunction "consisting of …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the claim body and not immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.

In the description of the present application, it is noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.

Approximating language, as used herein in the specification and claims, is intended to modify a quantity, such that the application is not limited to the specific quantity, but includes portions that are literally set forth for acceptable modification without departing from the essential function to which it is related. Accordingly, a value modified by "about" or "approximately" means that the application is not limited to the precise value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.

In addition, the indefinite articles "a" and "an" preceding an element or component of the application are provided without limitation to the number requirement (i.e. the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.

In addition, the technical features mentioned in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, fig. 1 is a schematic side view of a plywood according to an embodiment of the present application.

A plywood panel according to another embodiment of the present application, as shown in fig. 1, includes: the super-flat core board 1 is positioned at the center of the plywood; the largest downward plate surface of the panel 2 is horizontally attached to the largest upward plate surface of the ultra-flat core plate 1, and the length direction of the panel 2 is consistent with that of the ultra-flat core plate 1; the upward maximum board surface of the back board 3 is horizontally attached to the downward maximum board surface of the ultra-flat core board 1, and the length direction of the back board 3 is consistent with that of the ultra-flat core board 1; the wood core board comprises at least two wood fine materials 4, wherein the largest downward board surface of one wood fine material 4 is connected to the largest upward board surface of the panel 2, the largest upward board surface of the other wood fine material is connected to the largest downward board surface of the back board 3, and the length directions of the at least two wood fine materials 4 are consistent with the length direction of the ultra-flat core board 1.

In a preferred embodiment, the outer surface of the outermost wood fines 4 is provided with a protective layer, respectively. The protective layer can be coated with water paint as finishing paint, and any wood finishing paint can be used. Can effectively prolong the service life of the plywood.

Please refer to fig. 2, which is a cross-sectional view of a core structure according to an embodiment of the present application.

In an alternative embodiment, shown in fig. 2 a, the core 1 is a forward-facing vertical deck comprising at least two battens 10 (10); each plank 10(10) is provided with a first plank 101, a second plank 102 and a first plank 101 in sequence; the first wood board 101, the second wood board 102 and the first wood board 101 which are sequentially arranged are parallel in pairs, the maximum board surfaces are in fit connection, the minimum board surface in the length direction of any one wood board is in fit connection with the maximum surface of the panel 2, the plane where the maximum board surface of any one wood board is located is perpendicular to the plane where the maximum board surface of the panel 2 is located, and the length direction of any one wood board is consistent with the length direction of the panel 2.

In this embodiment, the forward vertical planking can generate a force perpendicular to the horizontal direction of the core board 1 to the whole core board 1, so that the structure is more stable, and when the environment is humid, the warping and deformation of each layer of wood board can be prevented. Meanwhile, each layer of the wood board of the ultra-flat core board 1 is made of solid wood materials, so that the ultra-flat core board is fine and compact in texture and strong in stability. The plywood made of the forward vertical floor board which is the ultra-flat core board 1 is mainly applied to wardrobe boards, wooden doors and engineering decoration.

In an alternative embodiment, shown in fig. 2B, the core 1 is a cross-laid panel comprising at least two strips 10 (10); each plank 10(10) is provided with a first plank 101, a second plank 102 and a first plank 101 in sequence; the first wood board 101, the second wood board 102 and the first wood board 101 are arranged in sequence, two of the first wood board 101, the second wood board 102 and the first wood board 101 are parallel, the maximum board surfaces of the first wood board and the second wood board are in fit connection, the minimum board surface in the length direction of any one wood board is in fit connection with the maximum surface of the panel 2, the plane where the maximum board surface of any one wood board is located is perpendicular to the plane where the maximum board surface of the panel 2 is located, and the length direction of any one wood board is consistent with the length direction of the panel 2; the second wood board 102 includes at least two third wood boards 1021, the minimum board surfaces of the at least two third wood boards 1021 in the length direction are in fit connection, the maximum board surfaces of the at least two third wood boards 1021 are parallel to and in fit connection with the maximum board surface of the first wood board 101, and the length directions of the at least two third wood boards 1021 are perpendicular to the length direction of the first wood board 101.

In this embodiment, the first boards 101 arranged in the cross-lapping manner can generate a force perpendicular to the horizontal direction of the core board 1 to the entire core board 1, and meanwhile, the third board 1021 is arranged between every two first boards 101, and the third board 1021 can generate a force parallel to the horizontal direction of the core board 1, so that the core board 1 has a more stable structure and a more creditable surface. When the environment is humid, the wood boards of each layer interact with each other, so that the plywood can be prevented from warping and deforming. Meanwhile, each layer of the wood board of the ultra-flat core board 1 is made of solid wood materials, so that the ultra-flat core board is fine and compact in texture and strong in stability. The cross vertical floor board is a plywood made of the ultra-flat core board 1 and is mainly applied to wardrobe boards, wooden doors and engineering decoration.

Referring to FIG. 3, FIG. 3 is a cross-sectional view of a core structure of a super-flat panel according to another embodiment of the present application

In an alternative embodiment, as shown in fig. 3B, the ultra-flat core board 1 is a cross multi-layer board substrate and includes at least two fourth boards 11, and the length directions of the at least two fourth boards 11 are consistent with the length direction of the face board 2; wherein, the upward maximum surface of one fourth wood board 11 is parallel to and jointed with the downward maximum surface of the panel 2; the downward maximum surface of the other fourth wood board 11 is parallel to and jointed with the upward maximum surface of the panel 2; the at least two fifth wood boards 11 are arranged between the at least two fourth wood boards 11 and are jointed and connected; as shown in FIG. 3A, each fifth plank 11 is rotated 90 horizontally between at least two fourth planks 11 such that its length is perpendicular to the length of the fourth plank 11; the minimum board surface of each fifth board 11 in the length direction is attached two by two.

In this embodiment, the ultra-flat core 1 is configured such that at least two plies of the fifth wood board 11 are sandwiched between every two plies of the fourth wood block 131, and the number of plies of the fourth wood board 11 is at least one more than the number of plies of the fifth wood board 11. Such a core plate structure is more stable.

Referring to fig. 4, fig. 4 is a structural diagram of a core board according to another embodiment of the present application.

In an alternative embodiment, as shown in fig. 4 a, the ultra-flat core plate 1 is provided with at least two wood strips 13; the at least two battens 13 are equal in height, are attached and connected in pairs along the length direction, and are consistent in length direction; the longitudinal direction of the wooden strip 13 coincides with the longitudinal direction of the panel 2.

In this embodiment, as shown in a top view of a parallel structure of two wood strips 13 shown in fig. 4B, each wood strip 13 may be formed by splicing a plurality of wood blocks 131 along a length direction, and joints of every two spliced wood strips 13 are arranged in a staggered manner. The wood block 131 has a length of 10-100mm, including but not limited to 10, 20, 30, 40, 50, 60, 70, 80, 90, 100mm and a thickness of 0.1-10mm, including but not limited to 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10 mm. The ultra-flat core plate 1 formed by splicing the wood strips 13 or the wood blocks 131 can solve the problem of the cracking of the transverse plates of the wood plates caused by high longitudinal strength. The super-flat core plate 1 has high structural strength, stable performance and good nail-holding power.

In an alternative embodiment, the face plate 2, the back plate 3, and the super flat core plate 1 are selected from one of poplar, maple, pine, cherry, birch, eucalyptus, fir, tung, basswood, beech, teak, oak, camphor, and willow. The preferred conifer species are those in which the fibers are long and flexible.

The poplar wood is a wood commonly used in northern China, is fine and soft in quality, stable in performance, low in price and easy to obtain. Is often used as an accessory of elm furniture and a moulding of lacquer furniture in ancient furniture. Also called "Populus tremula", which has satin-like luster, is also called "Populus tremula".

The maple is divided into soft maple and hard maple, belongs to temperate zone wood, is produced in the region from south of Yangtze river basin to Taiwan of China, and is produced abroad in the eastern United states. The wood is gray brown to gray red, the annual rings are not obvious, the number of the holes is large and small, and the distribution is uniform. The maple wood grains are staggered, the structure is kidney-thin and uniform, the weight is light and hard, and the pattern is excellent. Easy processing, unsmooth cut surface and easy warping when dried. The paint has good coating performance and strong bonding property.

Pine is a needle-leaved plant, which has the characteristics of pine fragrance, light yellow color, more furuncles, quick response to atmospheric temperature, easy swelling, difficult natural air drying and the like, so that the pine is required to be manually treated, such as drying, degreasing, removing organic compounds, bleaching, unifying tree color and neutralizing tree nature, and is not easy to deform.

The cherry trees naturally contain brown tree core spots and fine gum pits, have fine and clear textures, good polishing performance and good coating effect, and are suitable for being used as high-grade household articles. Good mechanical processing performance, quick drying, large shrinkage during drying, but good dimensional stability after drying.

Birch wood is light brown to reddish brown, has a shiny surface and a smooth mechanism. The color of yellow and white is brown, the growth rings are obvious, the wood body is pure and thin, the weight is slightly hard, the structure is thin, the mechanical strength is high, the elasticity is high, the moisture absorption is high, and the drying is easy to crack and warp. Is not very durable in decay-prone environments and is more used in splint form. Birch is commonly used for special plywood, flooring, furniture, pulp, interior materials, car and boat equipment, plywood, and the like. The furniture made is smooth and wear-resistant, and has clear pattern.

Eucalyptus is a light-colored broad-leaved wood with a tight and irregular grain. The sapwood layer is wider and is white to light pink; the heartwood is light brown red.

The fir wood is yellow-white, sometimes has light red brown color in core material, is soft, delicate, fragrant, straight in texture, easy to process, has the specific gravity of 0.38, strong corrosion resistance and is not eaten by termites. It can be used as raw material for building, bridge, ship, ore pillar, wood pile, electric pole, furniture and wood fibre industry.

The wood of tung has fine rays, straight wood grains, bright spun silk luster after planing, soft material and no smell. The wood is not deformed and warped and cracked, and has the advantages of moisture resistance, strong electrical insulation, low thermal conductivity, strong water resistance, corrosion resistance, wear resistance, beautiful texture, bright and bright color, beautiful and fine texture and excellent natural pattern. The sound conduction is strong, the tung wood is not easy to split but the wood is soft, easy to process, easy to carve and easy to dye. Has the advantages of smoke and moisture proof, and is not easy to be damaged by worms.

Basswood is yellowish white, slightly soft, straight in texture, slightly fine in structure, and has silky luster and soft feeling. The wood sawing, screwing, drilling, tenoning, nailing, gluing, painting, coloring and the like have good performance. The trunk neck is straight and straight, and the outturn percentage is high. The wood color is lighter, the gap is larger, and the wood is easy to dye or bleach. Low dry shrinkage, no deformation and cracking after drying, moderate hardness, and can be used as furniture material in northern area.

The beech material is hard and impact resistant. The fabric is easy to bend under steam, can be made into various shapes, but is not easy to deform when being dried, and is durable. The wood has uniform texture, beautiful texture and soft and smooth color. The processing, coating and gluing properties are good.

The teak wood is oily and bright, has uniform wood color and straight grains. Coarse fiber in the teak structure has the advantages of moderate weight, extremely small dry shrinkage coefficient, radial 2.2 percent of dry shrinkage from raw wood to air drying, 4.0 percent of chord direction, the smallest deformation coefficient in wood, good bending resistance, extremely wear resistance and air drying density of 0.65g/cm ³ . The coating does not warp and crack under the condition of large change of dryness and humidity of sun and rain; the water resistance and fire resistance are strong; can resist termite and other sea worm eating and has high corrosion resistance. Good drying performance, and good adhesion, painting and waxing performances.

Oak wood has relatively bright hill-shaped wood grains. In the toughness, the steel sheet can be processed into various curved shapes as required. Among the qualities, it is used in the manufacture of many ancient door and window lattices. Oak has large water content, is difficult to remove water completely and has no bearing capacity.

The camphor wood can adsorb peculiar smell gas in the air and adjust the indoor air humidity. Has strong fragrance, lasting smell, no deformation and high worm resistance. Has the functions of insect prevention, moisture absorption, peculiar smell elimination and air purification. The surface is reddish brown to dark brown, and the annual rings can be seen in the cross section. Heavy and hard.

Willow core material is light red, sapwood is dark white, and annual rings are clear. The wood has a fine structure, is soft, smooth after being planed, is inflammable and has poor corrosion resistance.

In an alternative embodiment, the thickness of the face plate 2 and the back plate 3 is 0.1-10mm, respectively; the thickness of the ultra-flat core plate 1 is 1-50 mm.

In the present embodiment, the thickness of the face sheet 2 and the back sheet 3 includes, but is not limited to, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1, 1.5mm, 2mm, 2.5mm, 3, 3.5mm, 4mm, 4.5mm, 5, 5.5mm, 6, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10 mm.

The thickness of the core 1 is preferably 3-18mm, including but not limited to 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, and 18 mm.

In an alternative embodiment, the face plate 2, the back plate 3, and the first wood plate 101, the second wood plate 102, the third wood plate 1021, the fourth wood plate 11, and the fifth wood plate 11 that form the super-flat core plate 1 are obtained by rotary cutting or slicing.

In this embodiment, the rotary cutting is a cutting process in which the wood segments are rotated by a fixed shaft until the cutting blades make linear feeding motion parallel to the axis of the wood segments, and the cutting is performed along the annual ring direction of the wood.

Slicing is the process of cutting thin wood chips from a wood segment with a planer tool.

Wood is a capillary porous limited expansion gel which does not automatically dissolve and lose its geometry after absorbing water, but only increases the size and volume by a certain amount, called swelling or swelling. The swelling of wood is caused by that the surface of cell wall microcrystals adsorbs water molecules, the water layer between the microcrystals is thickened, the microcrystals are propped open, and the cell wall of the wood and even the size of the whole wood are swelled. The magnitude of wood swelling is expressed as the swelling ratio, i.e. the percentage of the absolute dry dimension to the difference in dimension when wetted in air to the moisture content at the fiber saturation point, or the absolute dry dimension when wetted in water to a dimension which is stable and unchanged. The wet expansion of wood is anisotropic, the longitudinal wet expansion is very small, the transverse wet expansion is very large, and the chord-direction wet expansion in the transverse direction is far larger than the radial direction, and the difference is generally 2 times. The wet swelling of the wood is increased along with the increase of the water fraction, but the swelling increase values are different in different water content intervals. Therefore, the hygroscopic expansion value of wood is in a curve relation with the water content, but in practice, the hygroscopic expansion of wood is usually in a straight line relation with the water content.

Further, the thickness of the wood fines 4 is 5-500 filaments. Filament is unit, 1 filament is 0.01 mm.

In the present embodiment, the thickness of the wood fines 4 is preferably in the range of 10 to 300 filaments, and more preferably in the range of 50 to 150 filaments specifically includes, but is not limited to, 50 filaments, 60 filaments, 70 filaments, 80 filaments, 90 filaments, 10 filaments, 0 filaments, 110 filaments, 120 filaments, 130 filaments, 140 filaments, 150 filaments.

In an optional embodiment, the adhesive for bonding comprises urea-formaldehyde glue, formaldehyde-free glue, acid-formaldehyde glue, soybean glue and/or MDI glue. Among them, MDI glue is called diphenylmethane diisocyanate in the Chinese name. MDI is the generic name for diphenylmethane diisocyanates, mixtures containing certain proportions of pure MDI and polyphenyl polymethylene polyisocyanates and modifications of pure MDI and polymeric MDI.

In this embodiment, each glue may be used alone, or two or three kinds may be mixed.

EXAMPLE III

The present application further provides, in an embodiment, a plywood manufactured by the method of manufacturing of the first embodiment, and the use of a plywood having the features described in the other embodiments, comprising: the method is applied to the manufacturing of high-grade furniture doors and plates and engineering decoration.

The application aims to protect a plywood, which comprises an ultra-flat core plate, wherein the ultra-flat core plate is positioned at the center of the plywood; the downward maximum board surface of the panel is horizontally attached to the upward maximum board surface of the ultra-flat core board, and the length direction of the panel is consistent with that of the ultra-flat core board; the upward maximum board surface of the back board is horizontally attached to the downward maximum board surface of the ultra-flat core board, and the length direction of the back board is consistent with that of the ultra-flat core board; and at least two wood fine materials are respectively attached and connected to the upper surface of the panel and the lower surface of the back plate in the same way as the panel and the back plate are attached and connected with the super-flat core plate. The plywood is made of solid wood, so that the surface of the plywood is smoother; the ultra-flat core plates have various types, and can generate force in the horizontal direction or the longitudinal direction, so that the occurrence of plate surface cracking caused by excessive force in a certain direction is reduced. Meanwhile, the outer surface of the plywood is made of wood fine materials, the materials are more delicate and compact relative to wood veneers, and the problem of surface cracking caused by the flatness of high-grade furniture boards and different weather is solved.

It is to be understood that the above-described embodiments of the present application are merely illustrative of or illustrative of the principles of the present application and are not to be construed as limiting the present application. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application. Further, it is intended that the appended claims cover all such changes and modifications that fall within the scope and range of equivalents of the appended claims, or the equivalents of such scope and range.

Claims

1. A plywood sheet, comprising:

the ultra-flat core plate (1), wherein the ultra-flat core plate (1) is positioned at the center of the plywood;

the maximum upward plate surface of the super-flat core plate (1) is horizontally attached and connected to the maximum downward plate surface of the panel (2), and the length direction of the panel (2) is consistent with that of the super-flat core plate (1);

the upward maximum board surface of the back board (3) is horizontally attached to the downward maximum board surface of the ultra-flat core board (1), and the length direction of the back board (3) is consistent with that of the ultra-flat core board (1);

the wood core board comprises at least two wood fine materials (4), one is connected with the upward maximum board surface of the panel (2) in a fit mode, the upward maximum board surface of the wood fine materials (4) is connected with the downward maximum board surface of the back board (3) in a fit mode, and the length directions of the at least two wood fine materials (4) are consistent with the length direction of the super-flat core board (1).

2. Plywood according to claim 1, characterized in that the core (1) is a forward-laid board comprising at least two panels;

each lath is sequentially provided with a first wood board, a second wood board and a first wood board which are equal in height to the lath;

set gradually first plank the second plank first plank two liang of parallels, the biggest face laminating of plank are connected, and arbitrary the length direction's of plank minimum face with the biggest face laminating of panel (2) is connected, arbitrary the biggest face place plane of plank with the plane of the biggest face place of panel (2) is perpendicular, the length direction of arbitrary plank with the length direction of panel (2) is unanimous.

3. Plywood according to claim 1, characterized in that the core (1) is a cross-laid board comprising at least two panels;

the first wood board, the second wood board and the first wood board are arranged in sequence, the first wood board, the second wood board and the first wood board are parallel in pairs, the maximum board surfaces of the first wood board and the second wood board are in fit connection, the minimum board surface of any one wood board in the length direction is in fit connection with the maximum surface of the panel (2), the plane where the maximum board surface of any one wood board is located is perpendicular to the plane where the maximum surface of the panel (2) is located, and the length direction of any one wood board is consistent with the length direction of the panel (2); wherein,

the second plank includes two piece at least third planks, the minimum face laminating of length direction of two piece at least third planks is connected, the biggest face of two piece at least third planks all with the biggest face of first plank is parallel, the laminating is connected, just the length direction of two piece at least third planks with the length direction of first plank is perpendicular.

4. Plywood according to claim 1, characterized in that the ultra-flat core (1) is a cross-plied board substrate comprising at least two fourth boards, the length direction of which both coincide with the length direction of the panels (2); wherein,

the upward maximum surface of one fourth wood board is parallel to and jointed with the downward maximum surface of the panel (2);

the downward maximum board surface of the other fourth board is parallel to and jointed and connected with the upward maximum surface of the panel (2);

the at least two fifth wood boards are arranged between the at least two fourth wood boards and are jointed and connected;

each fifth plank is horizontally rotated by 90 degrees between the at least two fourth planks, so that the length direction of the fifth plank is perpendicular to the length direction of the fourth planks;

and the minimum board surfaces of the fifth boards in the length direction are jointed and connected in pairs.

5. Plywood according to claim 1, characterized in that the core (1) is provided with at least two strips (13);

the at least two battens (13) are equal in height, are attached and connected in pairs along the length direction, and are consistent in length direction;

the length direction of the wood strips (13) is consistent with the length direction of the panel (2).

6. Plywood according to claim 1,

the panel (2), the back plate (3) and the super flat core plate (1) are selected from one of poplar, maple, pine, cherry, birch, eucalyptus, fir, tung, basswood, beech, teak, oak, camphor and willow.

7. Plywood according to claim 3, characterized in that the thickness of the panels (2) and (3), respectively, is 0.1-10 mm;

the thickness of the ultra-flat core plate (1) is 1-50 mm.

8. Plywood according to claim 1, characterized in that the thickness of the wood fines (4) is 5-500 filaments.