阅读说明：本技术 曲面交错层积材及其生产方法 (Curved surface staggered laminated wood and production method thereof ) 是由 朱旭东 薛莹莹 沈杰 于 2020-06-17 设计创作，主要内容包括：本发明公开一种曲面交错层积材及其生产方法,曲面交错层积材包括：弯曲接合木板层和多层弯曲基木板层,所述弯曲接合木板层设于相邻所述弯曲基木板层之间并通过胶粘剂与所述弯曲基木板层粘结,相邻两个所述弯曲基木板层的木纤维方向与该两个所述弯曲基木板层之间的所述弯曲接合木板层的木纤维方向相交,每个弯曲基木板层包括多个弯曲木条,多个所述弯曲木条依次排列且相邻弯曲木条的侧面彼此贴合,根据本发明的曲面交错层积材,采用多层弯曲板材组成,工艺简单并在节约材料的使用的同时提高了承载力。(The invention discloses a curved surface staggered laminated timber and a production method thereof, and the curved surface staggered laminated timber comprises the following steps: the curved-surface staggered laminated wood comprises curved joint wood board layers and a plurality of curved base wood board layers, wherein the curved joint wood board layers are arranged between the adjacent curved base wood board layers and are bonded with the curved base wood board layers through adhesives, the wood fiber direction of the two adjacent curved base wood board layers is intersected with the wood fiber direction of the curved joint wood board layer between the two curved base wood board layers, each curved base wood board layer comprises a plurality of curved battens, the curved battens are sequentially arranged, and the side surfaces of the adjacent curved battens are attached to each other.)

1. A curved surface staggered laminated timber, comprising: crooked joint wood board layer and the crooked base wood board layer of multilayer, crooked joint wood board layer is located adjacently between the crooked base wood board layer and through the adhesive with crooked base wood board layer bonds, adjacent two the wood fibre direction of crooked base wood board layer and this two between the crooked base wood board layer the wood fibre direction of crooked joint wood board layer is crossing, and every crooked base wood board layer includes a plurality of crooked stuff, and is a plurality of crooked stuff is arranged in proper order and the side of adjacent crooked stuff is laminated each other.

2. The curved interleaving laminate as claimed in claim 1, wherein the wood fiber direction of adjacent two of said curved base wood sheet layers is orthogonal to the wood fiber direction of said curved joint wood sheet layer between the two curved base wood sheet layers.

3. The curved surface staggered laminated lumber according to claim 1, wherein the curved strips have a rectangular cross section, and a plurality of the curved strips are arranged in a width direction of the curved strips.

4. The curved interleaved laminate lumber according to claim 3 wherein the curved wood strands have a cross-sectional length of 60 to 100mm and a cross-sectional width of 20 to 45 mm.

5. The curved interleaved laminate as claimed in claim 1 wherein said curved splice wood sheet layer is a rotary cut veneer.

6. The curved interleaved laminate of claim 5 wherein said rotary cut sheet has a thickness of 0.5 to 3 mm.

7. The curved interleaved laminate as claimed in claims 1 to 6 wherein the curved strips are grooved on the surface of the curved strips opposite the curved laminated wood layers along the length of the curved strips.

8. A method for producing a curved surface staggered laminated timber is characterized by comprising the following steps:

processing the wood into battens;

forming the wood strip into a curved wood strip having a predetermined radius of curvature by hot or cold pressing;

sequentially arranging a plurality of bent battens and attaching the side surfaces of adjacent bent battens to each other to obtain a bent base wood board layer;

preparing a jointed wood board by rotary cutting the thin board;

bending the joined wooden boards to obtain bent joined wooden boards;

and superposing the bent base wood plate layers and the bent joint wood plates and bonding the bent base wood plate layers and the bent joint wood plates with each other by using an adhesive to obtain a curved surface staggered laminated wood, wherein the bent joint wood plates are positioned between the adjacent bent base wood plate layers, and the wood fiber directions of the two adjacent bent base wood plate layers are intersected with the wood fiber direction of the bent joint wood plate between the two bent base wood plate layers.

9. The method of claim 11 wherein the radius of curvature of the curved strips is determined by the rate of rebound of the strips and the relationship:

the thickness of the bent wood strip is less than or equal to the curvature radius/200 of the curved surface staggered laminated timber.

10. The method of claim 11, wherein the moisture content of the curved and joggled wood strips is controlled to be 8-19%.

Technical Field

The invention relates to the field of building materials, in particular to a curved surface staggered laminated timber and a production method thereof.

Background

The staggered laminated material is a novel material in the field of wood structure buildings at present, can be used for manufacturing walls, floors and roof boards, but buildings with curved surface requirements, such as arch bridges, Chinese characteristic civil buildings and the like. The related art also provides a method of milling a whole plate material to form a building with a corresponding curve, but the milling is complex and wastes a large amount of materials and manpower resources, so that a whole curved wooden plate which is simple to process, has high bearing capacity and is large in thickness is urgently needed.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the embodiment of the invention provides the curved surface staggered laminated timber which is simple to process and saves resources.

The curved surface staggered laminated timber according to the embodiment of the invention comprises: crooked joint wood board layer and the crooked base wood board layer of multilayer, crooked joint wood board layer is located adjacently between the crooked base wood board layer and through the adhesive with crooked base wood board layer bonds, adjacent two the wood fibre direction of crooked base wood board layer and this two between the crooked base wood board layer the wood fibre direction of crooked joint wood board layer is crossing, and every crooked base wood board layer includes a plurality of crooked stuff, and is a plurality of crooked stuff is arranged in proper order and the side of adjacent crooked stuff is laminated each other.

According to the embodiment of the invention, the curved surface staggered laminated material is formed by adopting a plurality of layers of bent plates, the process is simple, the material is saved, and the bearing capacity is improved.

In some embodiments, the wood fiber direction of adjacent two of the curved base wood plies is orthogonal to the wood fiber direction of the curved joint wood ply between the two curved base wood plies.

In some embodiments, the curved wooden strip has a rectangular cross section, and a plurality of the curved wooden strips are arranged in a width direction of the curved wooden strip.

In some embodiments, the length of the cross-section of the curved wooden strip is 60-100mm, and the width of the cross-section of the curved wooden strip is 20-45 mm.

In some embodiments, the curved splice wood sheet layer is a rotary cut veneer.

In some embodiments, the rotary-peeled sheet has a thickness of 0.5 to 3 mm.

In some embodiments, the surface of the curved plank opposite the curved joint plank layer is grooved along the length of the curved plank.

A method for producing a curved surface staggered laminated timber comprises the following steps:

processing the wood into battens;

forming the wood strip into a curved wood strip having a predetermined radius of curvature by hot or cold pressing;

sequentially arranging a plurality of bent battens and attaching the side surfaces of adjacent bent battens to each other to obtain a bent base wood board layer;

preparing a jointed wood board by rotary cutting the thin board;

bending the joined wooden boards to obtain bent joined wooden boards;

and superposing the bent base wood plate layers and the bent joint wood plates and bonding the bent base wood plate layers and the bent joint wood plates with each other by using an adhesive to obtain a curved surface staggered laminated wood, wherein the bent joint wood plates are positioned between the adjacent bent base wood plate layers, and the wood fiber directions of the two adjacent bent base wood plate layers are intersected with the wood fiber direction of the bent joint wood plate between the two bent base wood plate layers.

In some embodiments, the radius of curvature of the curved batten is determined by the spring rate of the batten and the relationship:

the thickness of the bent wood strip is less than or equal to the curvature radius/200 of the curved surface staggered laminated timber.

In some embodiments, the moisture content of the curved wood strips and the curved joint wood boards is controlled to be 8% -19%.

Drawings

Fig. 1 is a schematic structural view of a curved surface staggered laminated timber according to an embodiment of the invention.

Fig. 2 is a schematic structural view of a curved base wood sheet layer of the curved surface cross laminated timber according to the embodiment of the invention.

Fig. 3 is a schematic view of a curved joint wood layer structure of a curved surface cross laminated timber according to an embodiment of the invention.

Fig. 4 is a schematic structural view of a curved batten of a curved surface staggered laminated timber according to an embodiment of the invention.

Reference numerals:

the base wood veneer layer 1 is bent, the wood strips 11 are bent, the grooves 12 are bent, and the wood veneer layer 2 is joined.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1 to 4, the curved surface staggered laminated timber according to the embodiment of the invention comprises: the wood-based composite board comprises a bent joint wood board layer 2 and a plurality of layers of bent base wood board layers 1, wherein the bent joint wood board layer 2 is arranged between the adjacent bent base wood board layers 1 and is bonded with the bent base wood board layers 1 through an adhesive, the wood fiber direction of the two adjacent bent base wood board layers 1 is intersected with the wood fiber direction of the bent joint wood board layer 2 between the two bent base wood board layers 1, each bent base wood board layer 1 comprises a plurality of bent wood battens 11, the bent wood battens 11 are sequentially arranged, and the side faces of the adjacent bent wood battens 11 are attached to each other.

According to the embodiment of the invention, the curved surface staggered laminated material is formed by adopting a plurality of layers of bent plates, the process is simple, the material is saved, and the bearing capacity is improved.

In some embodiments, the cross section of the curved batten 11 is rectangular, the curved joint wood board layer 2 is manufactured by rotary-cut veneer, the curved joint wood board layer 2 is connected with the curved base wood board layer 1 through an adhesive, a plurality of grooves 12 are formed in the surface of the curved batten 11 opposite to the curved joint wood board layer 2 along the length direction of the curved batten 11, the grooves 12 are formed in the width direction of the curved batten 11, and the wood fiber direction of the curved joint wood board layer 2 is intersected with the wood fiber direction of the curved base wood board layer 1. The cross section of the bent batten 11 is rectangular, when the bent battens 11 are sequentially attached in the transverse direction to form the bent base wood plate layer 1, two adjacent bent battens 11 can be tightly attached, extra adhesive is not needed to fix the transverse direction of the bent battens 11, the whole stress of the bent base wood plate layer 1 can be uniform, the bent base wood plate layer 1 has high bearing capacity, the groove 12 is formed in the surface, opposite to the bent joint wood plate layer 2, of the bent battens 11 in the length direction of the bent battens 11, when the bent joint wood plate layer 2 is connected with the bent base wood plate layer 1 through the adhesive, the adhesive can flow into the groove 12, the contact surface between the adhesive and the bent base wood plate layer 1 is increased, the bonding strength between the bent base wood plate layer 1 and the bent joint wood plate layer 2 is increased, the overall strength of the curved laminated wood is increased, and the tensile strength in the grain-following direction of the wood is far greater than that in the grain-crossing direction, therefore, intersecting the wood fiber direction of the curved joint wood board layer 2 with the wood fiber direction of the curved base wood board layer 1 can equalize the tensile strength in each direction of the curved laminate, thereby enhancing the tensile strength of the curved laminate as a whole.

In some embodiments, the length of the cross section of the curved batten 11 is 60 to 100mm, the width of the cross section of the curved batten 11 is 20 to 45mm, the thickness of the rotary cut sheet is 0.5 to 3mm, the cross section of the groove 12 is a rectangle with 2mm of side, the interval between two adjacent grooves 12 in the width direction of the curved batten 11 is 15 to 25mm, and the angle is 45 to 135 °, preferably, the length of the cross section of the curved batten 11 is 90mm, the width of the cross section of the curved batten 11 is 30mm, the thickness of the rotary cut sheet is 2mm, the cross section of the groove 12 is a rectangle with 2mm of side, the interval between two adjacent grooves 12 in the width direction of the curved batten 11 is 20mm, and the angle is 90 °.

In some embodiments, a plurality of the bent bonding wood ply layers 2 between the adjacent two bent base wood ply layers 1 are provided according to actual needs, and the plurality of bent bonding wood ply layers 2 are stacked between the adjacent two bent base wood ply layers 1 by an adhesive.

In some embodiments, the slot 12 may also be a T-slot 12 or a dovetail slot 12.

The embodiment of the invention provides a production method of a curved surface staggered laminated timber, which comprises the following steps:

processing wood into battens, screening the battens by using a stress grading machine, reserving the battens meeting the secondary standard, and performing hot pressing on the battens for 15-20 minutes at the temperature of 120-150 ℃ and under the pressure of 1-1.2MPa by using a hot press or performing cold pressing on the battens for 3-5 hours at normal temperature and under the pressure of 1-1.2MPa by using a cold press to ensure that the battens have bent battens 11 with preset curvature radius;

sequentially arranging a plurality of bent wood strips 11 and attaching the side surfaces of the adjacent bent wood strips 11 to each other to obtain a bent base wood sheet layer 1;

processing the wood into a rotary-cut thin plate serving as a combined wood plate by rotary cutting and bending the combined wood plate to obtain a bent combined wood plate layer 2;

and (3) carrying out steam-jetting and drying on the bent base wood board layer 1 and the bent joint wood board layer 2 through a drying furnace, wherein the steam-jetting is carried out for 15 minutes, the drying is carried out for 25-30 days, and the water content of the dried bent base wood board layer 1 and the dried bent joint wood board layer 2 is controlled to be 8-19%.

Superposing the bent base wood board layers 1 and the bent joint wood board layers 2 and bonding the same to each other by using an adhesive to obtain a curved surface staggered laminated wood, wherein the bent joint wood board layers 2 are positioned between the adjacent bent base wood board layers 1, and the wood fiber direction of the two adjacent bent base wood board layers 1 is intersected with the wood fiber direction of the bent joint wood board layer 2 between the two bent base wood board layers 1;

and hot-pressing the laminated plate layer by using a hot press at the temperature of 120-150 ℃ and under the pressure of 1-1.2MPa for 1 minute per 1mm of the curved laminated timber, or cold-pressing the laminated plate layer for 8-12 hours at normal temperature and under the pressure of 1-1.2MPa by using a cold press.

In some embodiments, the radius of curvature of the curved batten 11 is determined by the spring rate of the batten and the relationship:

the thickness of the curved battens 11 is less than or equal to the curvature radius/200 of the curved surface staggered laminated timber.

In some embodiments, a plurality of the bent bonding wood ply layers 2 between the adjacent two bent base wood ply layers 1 are provided according to actual needs, and the plurality of bent bonding wood ply layers 2 are stacked between the adjacent two bent base wood ply layers 1 by an adhesive.

In some embodiments, a groove 12 is formed in a surface of the curved wooden strip 11 opposite to the curved joint wooden board layer 2 along a length direction of the curved wooden strip 11, the groove 12 is formed in a plurality along a width direction of the curved wooden strip 11, and the groove 12 may be a rectangular groove, a T-shaped groove, or a dovetail groove.

In some embodiments, if the section of the bent joint wood panel layer 2 is insufficient, the lap joint is performed in an oblique lap joint manner and a lap seam is reserved.

In some embodiments, the battens can be longitudinally spliced according to actual requirements, and the joint of two adjacent battens is provided with the teeth and the tooth grooves which are meshed with each other.

In some embodiments, the adhesive is one of an animal glue, a synthetic resin glue, or a vegetable glue.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.