CN111098369A - Large-section laminated wood manufactured by using small-diameter wood and manufacturing method thereof - Google Patents
Large-section laminated wood manufactured by using small-diameter wood and manufacturing method thereof Download PDFInfo
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- CN111098369A CN111098369A CN201911414368.1A CN201911414368A CN111098369A CN 111098369 A CN111098369 A CN 111098369A CN 201911414368 A CN201911414368 A CN 201911414368A CN 111098369 A CN111098369 A CN 111098369A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/10—Butting blanks of veneer; Joining same along edges; Preparatory processing of edges, e.g. cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27F—DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
- B27F1/00—Dovetailed work; Tenons; Making tongues or grooves; Groove- and- tongue jointed work; Finger- joints
- B27F1/16—Making finger joints, i.e. joints having tapers in the opposite direction to those of dovetail joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
- B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
- B27M3/0066—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by tongue and groove or tap hole connections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
- B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
- B27M3/0086—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by connecting using glue
Abstract
The invention discloses a large-section laminated wood manufactured by using small-diameter wood, which comprises a laminated wood body, wherein the laminated wood body is a cuboid and is formed by combining and gluing tooth-shaped polygonal columns and half-tooth-shaped polygonal columns, and each tooth-shaped polygonal column comprises opposite side planes and a sawtooth surface which are parallel to each other and have the same diameter and length; meanwhile, the manufacturing method of the large-section laminated wood is also disclosed, and comprises the steps of wood section preparation, tooth-shaped polygonal column processing, lengthening process, post-processing, half-tooth-shaped polygonal column processing and assembly process; the large-section laminated wood manufactured by the invention is tested and analyzed according to indexes of dipping and stripping, water content and formaldehyde emission, and all the indexes accord with the national standard of non-structural laminated wood.
Description
Technical Field
The invention relates to the field of wood processing, in particular to a large-section laminated wood manufactured by using small-diameter wood and a manufacturing method thereof.
Background
With the rapid development of the wood processing technology in China in recent years, a large amount of forestry resources are consumed, natural forest resources are deficient, large-diameter-grade high-quality wood is in short supply, and small-diameter wood occupies a higher proportion in the whole wood yield and becomes an important source of wood supply. How to scientifically and reasonably process the small diameter wood, improve the utilization rate of the small diameter wood and produce high value-added products becomes a problem which needs to be solved urgently in the aspects of wood processing and utilization. Under the condition, how to use small-diameter wood to manufacture large-section laminated wood becomes a new industry, and the market space is huge.
Through search, Chinese patent No. CN103341890, entitled method for preparing large-breadth thin plate by using small-diameter wood, which cuts the small-diameter wood with diameter of 6-11 cm into wood sections with length of 1m, divides the wood sections into five groups according to the small-end diameter and the grade difference of 10mm, and dries the wood sections to water content of 12%; sawing the wood section into rough tooth-shaped polygonal prisms with the inscribed circle diameters of the bottom surfaces of 46mm, 56mm, 66mm, 76mm and 86mm, cutting the rough tooth-shaped polygonal prisms by finger joint tenon lengthening and specification, and then milling the rough tooth-shaped polygonal prisms into refined regular hexagonal prisms with the inscribed circle diameters of the bottom surfaces of 40mm, 50mm, 60mm, 70mm and 80 mm; symmetrically splitting the hexagonal prism into a quadrangular prism through a maximum diagonal plane; symmetrically splitting the hexagonal prism into a pentagonal prism through a plane vertical to the side surface of the hexagonal prism; selecting the quantity of refined regular hexagonal prisms, pentagonal prisms and quadrangular prisms, gluing, assembling and bidirectionally pressurizing to obtain rectangular large-section glued battens, and sawing into large-width sheets with the thickness of 5-20 mm.
However, this solution has the following problems: when processing, what adopt is two-way pressurization mode, and the operation precision is higher, needs moreover to process quadrangular, pentagonal prism and hexagonal prism respectively, and the process is comparatively loaded down with trivial details.
Disclosure of Invention
In order to solve the existing problems, the invention discloses a large-section laminated wood manufactured by using small-diameter wood, which comprises a laminated wood body, wherein the laminated wood body is a cuboid and is formed by combining and gluing and pressing a tooth-shaped polygon prism and a half-tooth-shaped polygon prism, the tooth-shaped polygon prism comprises opposite side planes and sawtooth planes which are parallel to each other and have the same diameter length, the sawtooth planes comprise an upper sawtooth plane and a lower sawtooth plane which are oppositely arranged, the upper sawtooth plane consists of a first sawtooth plane and a second sawtooth plane, the lower sawtooth plane consists of a third sawtooth plane and a fourth sawtooth plane, and the first sawtooth plane and the third sawtooth plane are in a structure; the second sawtooth surface and the fourth sawtooth surface are structured;
the semi-tooth-shaped polygon prism is obtained by symmetrically cutting the vertical planes of two opposite side planes of the tooth-shaped polygon prism.
Preferably, at least three odd numbers of sawteeth are arranged on the upper sawtooth surface and/or the lower sawtooth surface.
Preferably, the serrated surface comprises a vertex angle and an intersection angle, the vertex angle is 30-120 degrees, and the intersection angle is 30-120 degrees.
Preferably, the apex of the apex angle is located on the same circumference as the apex on the side plane cross-section.
The invention also provides a manufacturing method of the large-section laminated wood, which comprises the following steps:
s1: preparing wood sections: cutting the small wood diameter into wood sections with the length of 50-100cm, and drying the wood sections to obtain standby wood sections;
s2: processing a tooth-shaped polygon prism;
processing the spare wood sections by alloy cutter sawing equipment to obtain a tooth-shaped polygonal column;
s3: processing a half-tooth polygon prism;
symmetrically sawing vertical planes of two opposite side planes of the tooth-shaped polygon prism obtained in the step S2 to obtain a half-tooth-shaped polygon prism;
and S4, preparing the large-section laminated wood by adopting a molding process.
Preferably, the step S4 is a molding process: processing finger joints on two end faces of the tooth-shaped polygon prism, coating glue on the finger joints at the end of the tooth-shaped polygon prism, lengthening by using a lengthening machine, and cutting into specification length by using a cut-off circular saw according to requirements after lengthening; designing and combining the machining quantity according to the specification requirement; and then gluing the side planes of the tooth-shaped polygonal prisms and the sawtooth surfaces of the half-tooth-shaped polygonal prisms, assembling in a special frame, sending the assembled blank into a cold press for unidirectional pressing after the assembly is finished, and curing the glue to obtain the large-section laminated wood.
Preferably, the step S4 is a molding process: gluing the side planes of the tooth-shaped polygonal prisms and the sawtooth surfaces of the half-tooth-shaped polygonal prisms, splicing the tooth-shaped polygonal prisms and the half-tooth-shaped polygonal prisms coated with the glue end to end in a special frame to form a large-width panel, wherein the splicing positions of the adjacent tooth-shaped polygonal prisms and/or the half-tooth-shaped polygonal prisms on the large-width panel are staggered, then starting to perform a multilayer staggered stacking mode on the vertical surface of the large-width panel to obtain the large-section laminated wood, and the splicing positions of the tooth-shaped polygonal prisms on the adjacent large-width panel are staggered; and (5) after the assembly is finished, sending the assembly into a cold press for unidirectional pressing, and curing the glue to obtain the large-section laminated wood.
Preferably, the splicing positions of the tooth-shaped polygonal columns on the large-width panel of each non-adjacent layer are located on the same vertical line.
Preferably, the small diameter wood is 5-10mm in diameter.
Preferably, the water content of the spare wood segments of the step S1 is 10-15%.
The invention has the beneficial effects that: (1) the small-diameter wood is processed into a symmetrical tooth-shaped polygon prism, so that the contact area is increased and the mechanical strength is enhanced when the small-diameter wood is glued; (2) the small-diameter wood is processed into the symmetrical tooth-shaped polygonal column, and only one-way pressurization is needed during pressurization, so that the process is simplified, and the operation is simple; (3) the small-diameter wood is processed into a symmetrical tooth-shaped polygonal column, zigzag lines are formed after pressing, stress release paths are prolonged, cracks are not prone to being generated on the laminated wood, mechanical strength is greatly enhanced, the stability of the laminated wood is good, and the rate of finished products is high. (4) The invention adopts the staggered stacking and lengthening process, and the prepared laminated wood has more excellent mechanical strength; (5) the prepared laminated wood product is tested and analyzed according to indexes of dipping and stripping, water content and formaldehyde emission, and all the indexes accord with the national standard of non-structural laminated wood.
Drawings
FIG. 1 is a schematic structural view of a large-section laminated wood of the present invention;
FIG. 2 is a cross-sectional view one of the tooth-type multi-prisms of the present invention;
FIG. 3 is a second cross-sectional view of the tooth form polygon of the present invention;
FIG. 4 is a schematic process flow diagram of the present invention;
FIG. 5 is a side view of an elongation process of example 4 of the present invention;
FIG. 6 is a top view of an elongation process of example 4 of the present invention;
FIG. 7 is a schematic structural view of embodiment 2 of the present invention;
in the figure, 1-tooth type polygon prism, 101-side plane, 102-sawtooth plane, 1021-first sawtooth plane, 1022-second sawtooth plane, 1023-third sawtooth plane, 1024-fourth sawtooth plane, 1025-vertex angle, 1026-intersection angle, 2-half tooth type polygon prism and 3-finger joint tenon.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. 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," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
Example 1
As shown in fig. 1, 2 and 3, a large-section laminated wood manufactured by using small-diameter wood comprises a laminated wood body, wherein the laminated wood body is a cuboid and is formed by combining and gluing a toothed polygon prism 1 and a half-toothed polygon prism 2, the toothed polygon prism 1 comprises opposite side planes 101 and a toothed plane 102 which are parallel to each other and have the same radial length, the toothed plane 102 comprises an upper toothed plane and a lower toothed plane which are oppositely arranged, the upper toothed plane comprises a first toothed plane 1021 and a second toothed plane 1022, the lower toothed plane comprises a third toothed plane 1023 and a fourth toothed plane 1024, and the first toothed plane 1021 and the third toothed plane 1023 have the same structure; the second serrated surface 1022 and the fourth serrated surface 1024 have the same structure;
the semi-tooth-shaped polygon prism 2 is obtained by symmetrically cutting the vertical plane of two opposite side planes 101 of the tooth-shaped polygon prism 1.
Example 2
The present embodiment is further optimized based on embodiment 1, and specifically, at least three odd number of saw teeth, preferably 3 or 5 saw teeth, are provided on the upper sawtooth surface and/or the lower sawtooth surface, as shown in fig. 7.
In particular, the serrated surface 102 comprises a vertex angle 1025 and an intersection angle 1026, the vertex angle 1025 being 30-120 °, the intersection angle 1026 being 30-120 °, preferred values: the apex angle is 60 degrees and the intersection angle is 60 degrees.
Specifically, the vertex of the vertex angle 1025 is located on the same circumference as the vertex on the cross section of the side plane 101.
Example 3
A method for manufacturing large-section laminated wood, comprising the following steps of:
s1: preparing wood sections: cutting the small diameter wood into wood sections with the length of 50cm, and drying the wood sections to obtain standby wood sections, wherein the diameter of the small diameter wood is 5mm, and the water content of the standby wood sections obtained in the step S1 is 10%.
S2: processing the tooth-shaped polygon prism 1;
processing the spare wood sections by alloy cutter sawing equipment to obtain a tooth-shaped polygonal column 1;
s3: processing the half-tooth polygon prism 2;
symmetrically sawing the vertical planes of the two opposite side planes of the tooth-shaped polygon prism 1 obtained in the step S2 to obtain a half-tooth-shaped polygon prism 2;
s4: the molding process comprises the following steps: processing finger joints 3 on two end faces of the tooth-shaped polygon prism 1, coating glue on the finger joints 3 at the end part of the tooth-shaped polygon prism 1, lengthening by using a lengthening machine, and cutting into specification length by using a cut circular saw according to requirements after lengthening;
designing and combining the machining quantity according to the specification requirement; and then gluing the side plane 101 of the tooth-shaped polygonal column and the sawtooth surface 102 of the half-tooth-shaped polygonal column, assembling in a special frame, sending the assembled components into a cold press for unidirectional pressing after the assembling is finished, and curing the glue to obtain the large-section laminated wood.
Example 4
The present embodiment is further optimized on the basis of embodiment 3, as shown in fig. 5 and 6, specifically, the step S4 is a molding process: gluing a side plane 101 of the tooth-shaped polygon prism and a sawtooth surface 102 of the half-tooth-shaped polygon prism, splicing the tooth-shaped polygon prism 1 and the half-tooth-shaped polygon prism 2 coated with the glue end to end in a special frame to form a large-width panel, wherein splicing positions of adjacent tooth-shaped polygon prisms and/or half-tooth-shaped polygon prisms on the large-width panel are arranged in a staggered mode, then starting to perform a multilayer staggered stacking mode on a vertical surface of the large-width panel to obtain a large-section laminated wood, and splicing positions of the tooth-shaped polygon prisms on the adjacent large-width panel are arranged in a staggered mode; and (5) after the assembly is finished, sending the assembly into a cold press for unidirectional pressing, and curing the glue to obtain the large-section laminated wood.
Example 5
The embodiment is further optimized on the basis of embodiment 4, and particularly, the splicing positions of the tooth-shaped polygonal columns on the large-width panels of each non-adjacent layer are located on the same vertical line, so that the operation is facilitated, and the efficiency is improved.
Example 6
The embodiment is further optimized on the basis of the implementation 3, and specifically, the optimization is performed by the following steps of S1: preparing wood sections: cutting the small diameter wood into wood sections with the length of 60cm, and drying the wood sections to obtain standby wood sections, wherein the diameter of the small diameter wood is 7mm, and the water content of the standby wood sections obtained in the step S1 is 12%.
Example 7
The embodiment is further optimized on the basis of the implementation 3, and specifically, the optimization is performed by the following steps of S1: preparing wood sections: cutting the small diameter wood into wood sections with the length of 100cm, and drying the wood sections to obtain standby wood sections, wherein the diameter of the small diameter wood is 10mm, and the water content of the standby wood sections obtained in the step S1 is 15%.
Comparative example 1
The method comprises the steps of cutting small-diameter wood with the diameter of 10mm into regular hexagons by adopting the prior art, and performing bidirectional pressure molding on the small-diameter wood to obtain the large-section laminated wood.
The test pieces prepared in examples 3 to 7 and comparative example 1 and having a size of 50X 70mm were subjected to the performance test, and the test values are shown in Table 1;
(1) the water content is measured according to the GB/T17657-2013;
(2) measuring the dipping and stripping performance; soaking a test piece in a constant-temperature water tank at 10-25 ℃ for 6h, placing the test piece in an air convection drying box at 60 +/-3 ℃, drying the test piece to 95-100% before a test in a state of discharging moisture, measuring the peeling length (the peeling gap is less than 0.05mm and the peeling length is less than 3 mm) of the glue layer at two ends of the test piece, and then, according to the following formula, the peeling rate of two sections;
P＝L1/L0×100；
in the formula:
p represents a peel rate,%;
l1 represents the sum of the stripping lengths of the glue layers of the two sections of the test piece, and the unit is mm;
l0 represents the sum of the lengths of the rubber layers of the two sections of the test piece, and the unit is mm;
(3) formaldehyde emission measurement
(4) The formaldehyde emission measurement is carried out according to GB/T26899-2011;
(5) flexural strength measurements were performed in BG/T1936.1;
table 1 performance test values of test pieces of comparative examples 1 of grades 3 to 7 of examples 3
The samples of 3-7 are tested and analyzed according to indexes of dipping and stripping, water content and formaldehyde release amount, and all meet the national standard of LY/T1787-.
The above embodiments only describe the best mode of use of the existing equipment, and similar common mechanical means are used to replace the elements in the present embodiments, which fall into the protection scope.
Claims (10)
1. A large-section laminated wood manufactured by small-diameter wood is characterized in that: the laminated wood comprises a laminated wood body, wherein the laminated wood body is a cuboid and is formed by combining and gluing a tooth-shaped polygonal column (1) and a half-tooth-shaped polygonal column (2), the tooth-shaped polygonal column (1) comprises an opposite side plane (101) and a sawtooth surface (102) which are parallel to each other and have the same diameter length, the sawtooth surface (102) comprises an upper sawtooth surface and a lower sawtooth surface which are oppositely arranged, the upper sawtooth surface comprises a first sawtooth surface (1021) and a second sawtooth surface (1022), the lower sawtooth surface comprises a third sawtooth surface (1023) and a fourth sawtooth surface (1024), and the first sawtooth surface (1021) and the third sawtooth surface (1023) are consistent in structure; the second sawtooth surface (1022) and the fourth sawtooth surface (1024) are consistent in structure;
the semi-tooth-shaped polygon prism (2) is obtained by symmetrically cutting the vertical plane of two opposite side planes (101) of the tooth-shaped polygon prism (1).
2. A large-section laminated wood made of small-diameter wood according to claim 1, wherein: at least three odd numbers of sawteeth are arranged on the upper sawtooth surface and/or the lower sawtooth surface.
3. A large-section laminated wood made of small-diameter wood according to claim 1, wherein: the serrated surface (102) comprises a vertex angle (1025) and an intersection angle (1026), the vertex angle (1025) being 30-120 °, and the intersection angle (1026) being 30-120 °.
4. A large-section laminated wood made of small-diameter wood according to claim 1, wherein: the vertex of the vertex angle (1025) and the vertex on the section of the side plane (101) are positioned on the same circumference.
5. A method for manufacturing a large-section laminated wood by using small-diameter wood is characterized by comprising the following steps of: comprises the following steps:
s1: preparing wood sections: cutting the small wood diameter into wood sections with the length of 50-100cm, and drying the wood sections to obtain standby wood sections;
s2: processing the tooth-shaped polygon prism (1);
processing the spare wood sections by alloy cutter sawing equipment to obtain a tooth-shaped polygonal column (1);
s3: processing the half-tooth polygon prism (2);
symmetrically sawing and cutting vertical planes of two opposite side planes of the tooth-shaped polygon prism (1) obtained in the step S2 to obtain a half-tooth-shaped polygon prism (2);
s4: the large-section laminated wood is prepared by adopting a molding process.
6. The method for manufacturing large-section glued wood by using small-diameter wood according to claim 5, wherein the method comprises the following steps: the step S4 molding process: processing finger tenons (3) on two end faces of the tooth-shaped polygon prism (1), gluing the finger tenons (3) on the end part of the tooth-shaped polygon prism (1), then adopting a lengthening machine to perform lengthening, and cutting into specification length by a cut circular saw according to requirements after the lengthening;
designing and combining the machining quantity according to the specification requirement; and then gluing the side plane (101) of the tooth-shaped polygonal column and the sawtooth surface (102) of the half-tooth-shaped polygonal column, assembling in a special frame, sending the assembled components into a cold press for unidirectional pressing after the assembling is finished, and curing the glue to obtain the large-section laminated wood.
7. The method for manufacturing large-section glued wood by using small-diameter wood according to claim 5, wherein the method comprises the following steps: the step S4 molding process comprises the following steps: gluing side planes (101) of the tooth-shaped polygon prisms and sawtooth surfaces (102) of the half-tooth-shaped polygon prisms, splicing the tooth-shaped polygon prisms (1) and the half-tooth-shaped polygon prisms (2) coated with the glue end to end in a special frame to form a large-width panel, staggering splicing positions of the adjacent tooth-shaped polygon prisms and/or the half-tooth-shaped polygon prisms on the large-width panel, starting to perform multilayer staggered stacking on a vertical surface of the large-width panel to obtain large-section laminated wood, and staggering splicing positions of the tooth-shaped polygon prisms on the adjacent large-width panel; and (5) after the assembly is finished, sending the assembly into a cold press for unidirectional pressing, and curing the glue to obtain the large-section laminated wood.
8. The method for manufacturing large-section laminated wood by using small-diameter wood according to claim 7, wherein the method comprises the following steps: and the splicing positions of the tooth-shaped polygonal columns on the large-width panels of each non-adjacent layer are positioned on the same vertical line.
9. The method for manufacturing large-section laminated wood by using small-diameter wood according to claim 8, wherein the method comprises the following steps: the diameter of the small-diameter wood is 5-10 mm.
10. The method for manufacturing large-section laminated wood by using small-diameter wood according to claim 9, wherein the method comprises the following steps: the water content of the standby wood sections in the step S1 is 10-15%.
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| CN114851325A (en) * | 2022-04-19 | 2022-08-05 | 柳州市悟新木工机械有限公司 | Production method of hexagonal integrated flitch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114633333A (en) * | 2022-02-08 | 2022-06-17 | 泰州市龙洋木业有限公司 | Large-section hexagonal prism laminated wood pressurizing and gluing process |
| CN114851325A (en) * | 2022-04-19 | 2022-08-05 | 柳州市悟新木工机械有限公司 | Production method of hexagonal integrated flitch |
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