CN107310011B - Isotropic wood particle board - Google Patents
Isotropic wood particle board Download PDFInfo
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- CN107310011B CN107310011B CN201710707326.1A CN201710707326A CN107310011B CN 107310011 B CN107310011 B CN 107310011B CN 201710707326 A CN201710707326 A CN 201710707326A CN 107310011 B CN107310011 B CN 107310011B
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- 239000002245 particle Substances 0.000 title claims abstract description 159
- 239000002023 wood Substances 0.000 title claims abstract description 108
- 239000000843 powder Substances 0.000 claims abstract description 138
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 48
- 238000003825 pressing Methods 0.000 claims abstract description 35
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 34
- 241000219000 Populus Species 0.000 claims abstract description 17
- 241000209140 Triticum Species 0.000 claims abstract description 17
- 235000021307 Triticum Nutrition 0.000 claims abstract description 17
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 17
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 17
- 239000004626 polylactic acid Substances 0.000 claims abstract description 17
- 239000010902 straw Substances 0.000 claims abstract description 17
- 238000007731 hot pressing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 33
- 230000006835 compression Effects 0.000 claims description 19
- 238000007906 compression Methods 0.000 claims description 19
- 238000013473 artificial intelligence Methods 0.000 claims description 7
- 238000005056 compaction Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 6
- 238000007723 die pressing method Methods 0.000 description 5
- 238000004080 punching Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Forests & Forestry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention discloses an isotropic wood particle board which is formed by mixing 45-50% of fast-growing poplar branch powder particles, 35-40% of wheat straw powder particles, 5-10% of calcium carbonate powder particles and 3-5% of polylactic acid in percentage by mass. The invention aims to provide an isotropic wood particle board, which is formed by hot-pressing six-sided bidirectional non-simultaneous pressing dies according to specific mass percentage by adopting fast-growing poplar branch powder particles, wheat straw powder particles, calcium carbonate powder particles and polylactic acid, so that the physical and mechanical properties of all parts of a product are uniform and consistent.
Description
Technical Field
The invention belongs to the field of new materials and material processing engineering, and particularly relates to an isotropic wood particle board.
Background
In the powder material science and technology molded product industry (particularly in the closed rigid molded product industry), products are molded in a unidirectional (or bidirectional) mode in the Y-axis direction generally, and the X-axis direction and the Z-axis direction are only restrained by a mold wall. The density distribution of the green compact of powder material obtained by means of this shaping is represented by: when one-way die pressing forming is carried out, the density of the pressed compact is distributed in a gradient way, one end of the density of the pressed compact is high, and the other end of the density of the pressed compact is low; when the two-way die pressing is formed, the density of the pressed compact is distributed in a parabolic manner, and the intermediate density of the pressed compact is the lowest. Therefore, the final physical and mechanical properties of each part of the product are difficult to obtain uniform in the die forming mode, whether the die forming mode is unidirectional or bidirectional, and finally the service performance of the product is reduced.
An effective method for obtaining isotropy of a powder material molded product is to perform bidirectional molding of the powder material from three directions of X, Y, Z with the aid of a special mold. Based on the forming thought, the scheme provides a six-face bidirectional non-simultaneous powder pressing material forming method, and finally an isotropic wood particle board is obtained. The six-side bidirectional non-simultaneous press forming method adopted by the invention is particularly suitable for hot press forming of the wood particle board with particularly high requirement on density uniformity, and is also suitable for press forming of powder metallurgy products.
Disclosure of Invention
The invention aims to provide an isotropic wood particle board, which is formed by hot-pressing six-sided bidirectional non-simultaneous pressing dies according to specific mass percentage by adopting fast-growing poplar branch powder particles, wheat straw powder particles, calcium carbonate powder particles and polylactic acid, so that the physical and mechanical properties of all parts of a product are uniform and consistent.
In order to realize the purpose, the invention adopts the technical scheme that: an isotropic wood particle board is formed by mixing 45-50% of fast-growing poplar branch powder particles, 35-40% of wheat straw powder particles, 5-10% of calcium carbonate powder particles and 3-5% of polylactic acid according to mass percentage; the isotropic wood particle board is formed by hot pressing through a six-sided bidirectional non-simultaneous pressing die.
Preferably, the six-face bidirectional non-simultaneous pressing die consists of a female die (1), an upper punch (2), a lower punch (3), a front punch (6), a rear punch (4), a left punch (7) and a right punch (5), the upper punch, the lower punch, the front punch, the rear punch, the left punch, the right punch, the front punch, the rear punch, the left punch, the rear punch, the right punch, the front punch, the rear punch, the.
Preferably, the method for forming the wood particle board comprises the following steps:
1) powder filling, namely mixing the fast-growing poplar branch powder particles, the wheat straw powder particles, the calcium carbonate powder particles and the polylactic acid in proportion to obtain quantitative loose wood powder particles, and filling the loose wood powder particles into a female die cavity;
2) compressing the loose wood powder particles up and down to be equal to the height of the front, the back, the left and the right punches to obtain primary pressed blanks of the wood powder particles;
3) performing front-back two-way compression on the primary pressed blank of the wood powder particles on the basis of the step 2) to enable the width of the pressed blank to be equal to the width of the left and right punches, and obtaining a secondary pressed blank of the wood powder particles;
4) and (3) performing left-right bidirectional pressing, and performing left-right bidirectional compression on the wood powder particle secondary pressed blank on the basis of the step 3) to obtain the final wood powder particle pressed blank.
Preferably, the density difference of the parts of the wood particle board is less than 0.01g/cm 3.
Preferably, the forming method performs bidirectional pressing on the powder body in three dimensions of up-down, front-back and left-right, and is realized according to the sequence of up-down, front-back and left-right.
Preferably, the step 2), the step 3) and the step 4) are implemented by controlling an artificial intelligence module.
The invention has the beneficial effects that: (1) the density difference of each part of the powder material compact obtained by six-sided bidirectional non-simultaneous hot die pressing is 0.05-0.15g/cm from the conventional one-dimensional (such as Z axis) bidirectional pressing density difference level3Increasing the concentration to 0.01-0.02g/cm3Thereby realizing the isotropy target of the powder material molded product. The forming method is not only suitable for wood particle boards, but also suitable for die pressing of powder metallurgy materials and other powder materials. (2) The isotropic wood particle board obtained by six-sided bidirectional non-simultaneous hot die pressing has good toughness, high hardness, no cracking, no deformation and no moisture absorption, and is an ideal structural material in the fields of home hardcover, high-grade furniture and industry.
Drawings
Fig. 1 is a schematic view of a molding die in a powder charging process, wherein (a) is a schematic view of a main view, and (b) is a schematic view of a top view.
Fig. 2 is a schematic view of an up-down bidirectional pressing process, wherein (a) is a schematic view of a front view and (b) is a schematic view of a top view.
FIG. 3 is a schematic diagram of a front-back bi-directional pressing process, wherein (a) is a schematic diagram of a front view and (b) is a schematic diagram of a top view.
Fig. 4 is a schematic diagram of a left-right bidirectional pressing process, wherein (a) is a schematic diagram of a front view, and (b) is a schematic diagram of a top view.
The text labels in the figures are represented as: 1. a female die; 2. punching by an upper die; 3. punching a lower die; 4. punching a rear die; 5. punching a right die; 6. front stamping; 7. punching a left die; 10. loose wood powder particles; 20. primary pressed compact of wood powder particles; 30. secondary pressing blanks of wood powder particles; 40. and (3) pressing the wood powder particles into a compact.
Detailed Description
The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
The following are specific examples
Example 1
An isotropic wood particle board, comprising, in weight percent: is prepared by mixing 45 percent of fast-growing poplar branch powder particles, 40 percent of wheat straw powder particles, 10 percent of calcium carbonate powder particles and 5 percent of polylactic acid.
The wood particle plate is formed by hot press of a six-sided bidirectional non-simultaneous pressing die, the forming die comprises a female die (1), an upper punch (2), a lower punch (3), a front punch (6), a rear punch (4), a left punch (7) and a right punch (5), the upper punch, the lower punch, the front punch, the rear punch, the left punch, the right punch, the front punch, the rear punch, the left punch.
The forming method of the wood particle board comprises the following steps:
1) powder filling, namely mixing the fast-growing poplar branch powder particles, the wheat straw powder particles, the calcium carbonate powder particles and the polylactic acid in proportion to obtain quantitative loose wood powder particles, and then filling the loose wood powder particles into a female die cavity;
2) the loose wood powder particles are compressed up and down to be equal to the front, back, left and right punches in height, and primary pressed blanks of the wood powder particles with higher density are obtained; (precision grade: the height of the green compact is 0.1-0.15mm higher than that of the front, back, left and right dies), as shown in figure 2;
3) performing front-back two-way compression on the primary pressed blank of the wood powder particles on the basis of the step 2), so that the width of the pressed blank is equal to the width of a left punch and a right punch, the density of the pressed blank is further improved, and a secondary pressed blank of the wood powder particles is obtained; (precision grade: the green compact width is 0.1-0.15mm wider than the left and right punches) as shown in FIG. 3;
4) and (3) performing left-right bidirectional compression, namely performing left-right bidirectional compression on the wood powder particle secondary pressed blank on the basis of the step 3) to enable the length size of the pressed blank to reach the standard, and obtaining the final wood powder particle pressed blank, wherein the step is shown in figure 4.
The density difference of each part of the wood particle board is less than 0.01g/cm3。
The forming method carries out bidirectional pressing on the powder body in three dimensions of up-down, front-back and left-right, and is realized according to the sequence of up-down, front-back and left-right.
The six-surface bidirectional non-simultaneous pressing process is controlled and implemented by an artificial intelligence module.
Example 2
An isotropic wood particle board, comprising, in weight percent: is prepared by mixing 50 percent of fast-growing poplar branch powder particles, 35 percent of wheat straw powder particles, 10 percent of calcium carbonate powder particles and 5 percent of polylactic acid.
The wood particle plate is formed by hot press of a six-sided bidirectional non-simultaneous pressing die, the forming die comprises a female die (1), an upper punch (2), a lower punch (3), a front punch (6), a rear punch (4), a left punch (7) and a right punch (5), the upper punch, the lower punch, the front punch, the rear punch, the left punch, the right punch, the front punch, the rear punch, the left punch.
The forming method of the wood particle board comprises the following steps:
1) powder filling, namely mixing the fast-growing poplar branch powder particles, the wheat straw powder particles, the calcium carbonate powder particles and the polylactic acid in proportion to obtain quantitative loose wood powder particles, and then filling the loose wood powder particles into a female die cavity;
2) the loose wood powder particles are compressed up and down to be equal to the front, back, left and right punches in height, and primary pressed blanks of the wood powder particles with higher density are obtained; (precision grade: the height of the green compact is 0.1-0.15mm higher than that of the front, back, left and right dies), as shown in figure 2;
3) performing front-back two-way compression on the primary pressed blank of the wood powder particles on the basis of the step 2), so that the width of the pressed blank is equal to the width of a left punch and a right punch, the density of the pressed blank is further improved, and a secondary pressed blank of the wood powder particles is obtained; (precision grade: the green compact width is 0.1-0.15mm wider than the left and right punches) as shown in FIG. 3;
4) and (3) performing left-right bidirectional compression, namely performing left-right bidirectional compression on the wood powder particle secondary pressed blank on the basis of the step 3) to enable the length size of the pressed blank to reach the standard, and obtaining the final wood powder particle pressed blank, wherein the step is shown in figure 4.
The density difference of each part of the wood particle board is less than 0.01g/cm3。
The forming method carries out bidirectional pressing on the powder body in three dimensions of up-down, front-back and left-right, and is realized according to the sequence of up-down, front-back and left-right.
The six-surface bidirectional non-simultaneous pressing process is controlled and implemented by an artificial intelligence module.
Example 3
An isotropic wood particle board, comprising, in weight percent: is prepared by mixing 50 percent of fast-growing poplar branch powder particles, 40 percent of wheat straw powder particles, 7 percent of calcium carbonate powder particles and 3 percent of polylactic acid.
The wood particle plate is formed by hot press of a six-sided bidirectional non-simultaneous pressing die, the forming die comprises a female die (1), an upper punch (2), a lower punch (3), a front punch (6), a rear punch (4), a left punch (7) and a right punch (5), the upper punch, the lower punch, the front punch, the rear punch, the left punch, the right punch, the front punch, the rear punch, the left punch.
The forming method of the wood particle board comprises the following steps:
1) powder filling, namely mixing the fast-growing poplar branch powder particles, the wheat straw powder particles, the calcium carbonate powder particles and the polylactic acid in proportion to obtain quantitative loose wood powder particles, and then filling the loose wood powder particles into a female die cavity;
2) the loose wood powder particles are compressed up and down to be equal to the front, back, left and right punches in height, and primary pressed blanks of the wood powder particles with higher density are obtained; (precision grade: the height of the green compact is 0.1-0.15mm higher than that of the front, back, left and right dies), as shown in figure 2;
3) performing front-back two-way compression on the primary pressed blank of the wood powder particles on the basis of the step 2), so that the width of the pressed blank is equal to the width of a left punch and a right punch, the density of the pressed blank is further improved, and a secondary pressed blank of the wood powder particles is obtained; (precision grade: the green compact width is 0.1-0.15mm wider than the left and right punches) as shown in FIG. 3;
4) and (3) performing left-right bidirectional compression, namely performing left-right bidirectional compression on the wood powder particle secondary pressed blank on the basis of the step 3) to enable the length size of the pressed blank to reach the standard, and obtaining the final wood powder particle pressed blank, wherein the step is shown in figure 4.
The density difference of each part of the wood particle board is less than 0.01g/cm3。
The forming method carries out bidirectional pressing on the powder body in three dimensions of up-down, front-back and left-right, and is realized according to the sequence of up-down, front-back and left-right.
The six-surface bidirectional non-simultaneous pressing process is controlled and implemented by an artificial intelligence module.
Example 4
An isotropic wood particle board, comprising, in weight percent: is prepared by mixing 50 percent of fast-growing poplar branch powder particles, 40 percent of wheat straw powder particles, 5 percent of calcium carbonate powder particles and 5 percent of polylactic acid.
The wood particle plate is formed by hot press of a six-sided bidirectional non-simultaneous pressing die, the forming die comprises a female die (1), an upper punch (2), a lower punch (3), a front punch (6), a rear punch (4), a left punch (7) and a right punch (5), the upper punch, the lower punch, the front punch, the rear punch, the left punch, the right punch, the front punch, the rear punch, the left punch.
The forming method of the wood particle board comprises the following steps:
1) powder filling, namely mixing the fast-growing poplar branch powder particles, the wheat straw powder particles, the calcium carbonate powder particles and the polylactic acid in proportion to obtain quantitative loose wood powder particles, and then filling the loose wood powder particles into a female die cavity;
2) the loose wood powder particles are compressed up and down to be equal to the front, back, left and right punches in height, and primary pressed blanks of the wood powder particles with higher density are obtained; (precision grade: the height of the green compact is 0.1-0.15mm higher than that of the front, back, left and right dies), as shown in figure 2;
3) performing front-back two-way compression on the primary pressed blank of the wood powder particles on the basis of the step 2), so that the width of the pressed blank is equal to the width of a left punch and a right punch, the density of the pressed blank is further improved, and a secondary pressed blank of the wood powder particles is obtained; (precision grade: the green compact width is 0.1-0.15mm wider than the left and right punches) as shown in FIG. 3;
4) and (3) performing left-right bidirectional compression, namely performing left-right bidirectional compression on the wood powder particle secondary pressed blank on the basis of the step 3) to enable the length size of the pressed blank to reach the standard, and obtaining the final wood powder particle pressed blank, wherein the step is shown in figure 4.
The density difference of each part of the wood particle board is less than 0.01g/cm3。
The forming method carries out bidirectional pressing on the powder body in three dimensions of up-down, front-back and left-right, and is realized according to the sequence of up-down, front-back and left-right.
The six-surface bidirectional non-simultaneous pressing process is controlled and implemented by an artificial intelligence module.
Example 5
An isotropic wood particle board, comprising, in weight percent: is prepared by mixing 48 percent of fast-growing poplar branch powder particles, 38 percent of wheat straw powder particles, 10 percent of calcium carbonate powder particles and 4 percent of polylactic acid.
The wood particle plate is formed by hot press of a six-sided bidirectional non-simultaneous pressing die, the forming die comprises a female die (1), an upper punch (2), a lower punch (3), a front punch (6), a rear punch (4), a left punch (7) and a right punch (5), the upper punch, the lower punch, the front punch, the rear punch, the left punch, the right punch, the front punch, the rear punch, the left punch.
The forming method of the wood particle board comprises the following steps:
1) powder filling, namely mixing the fast-growing poplar branch powder particles, the wheat straw powder particles, the calcium carbonate powder particles and the polylactic acid in proportion to obtain quantitative loose wood powder particles, and then filling the loose wood powder particles into a female die cavity;
2) the loose wood powder particles are compressed up and down to be equal to the front, back, left and right punches in height, and primary pressed blanks of the wood powder particles with higher density are obtained; (precision grade: the height of the green compact is 0.1-0.15mm higher than that of the front, back, left and right dies), as shown in figure 2;
3) performing front-back two-way compression on the primary pressed blank of the wood powder particles on the basis of the step 2), so that the width of the pressed blank is equal to the width of a left punch and a right punch, the density of the pressed blank is further improved, and a secondary pressed blank of the wood powder particles is obtained; (precision grade: the green compact width is 0.1-0.15mm wider than the left and right punches) as shown in FIG. 3;
4) and (3) performing left-right bidirectional compression, namely performing left-right bidirectional compression on the wood powder particle secondary pressed blank on the basis of the step 3) to enable the length size of the pressed blank to reach the standard, and obtaining the final wood powder particle pressed blank, wherein the step is shown in figure 4.
The density difference of each part of the wood particle board is less than 0.01g/cm3。
The forming method carries out bidirectional pressing on the powder body in three dimensions of up-down, front-back and left-right, and is realized according to the sequence of up-down, front-back and left-right.
The six-surface bidirectional non-simultaneous pressing process is controlled and implemented by an artificial intelligence module.
The experimental comparison of example 5 of the present invention resulted in the following table:
| one-way pressing | Two-way pressing | The invention (three-dimensional bidirectional pressing: up-down, front-back, left-right bidirectional pressing) | |
| Green compact density distribution | Is distributed in gradient | Is distributed in a parabola shape | Uniformity |
| Difference in density | Large (> 0.2 g/cm)3） | Larger (> 0.1 g/cm)3） | Minute (< 0.02 g/cm)3） |
| Low density part | One end of the pressed compact | Middle part of pressed compact | Center point of green compact |
From the above table, it is clear that the wood particle board obtained by the present invention is more uniform than the existing press forming method.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (5)
1. An isotropic wood particle board is characterized by being formed by mixing 45-50% of fast-growing poplar branch powder particles, 35-40% of wheat straw powder particles, 5-10% of calcium carbonate powder particles and 3-5% of polylactic acid in percentage by mass; the isotropic wood particle board is formed by hot pressing through a six-sided bidirectional non-simultaneous pressing die;
the forming method of the wood particle board comprises the following steps:
1) powder filling, namely mixing the fast-growing poplar branch powder particles, the wheat straw powder particles, the calcium carbonate powder particles and the polylactic acid in proportion to obtain quantitative loose wood powder particles, and filling the loose wood powder particles into a female die cavity;
2) compressing the loose wood powder particles up and down to be equal to the height of the front, the back, the left and the right punches to obtain primary pressed blanks of the wood powder particles;
3) performing front-back two-way compression on the primary pressed blank of the wood powder particles on the basis of the step 2) to enable the width of the pressed blank to be equal to the width of the left and right punches, and obtaining a secondary pressed blank of the wood powder particles;
4) and (3) performing left-right bidirectional pressing, and performing left-right bidirectional compression on the wood powder particle secondary pressed blank on the basis of the step 3) to obtain the final wood powder particle pressed blank.
2. The isotropic wood particle board as claimed in claim 1, wherein the six-sided bidirectional non-simultaneous pressing die is composed of a female die (1), an upper punch (2), a lower punch (3), a front punch (6), a rear punch (4), a left punch (7) and a right punch (5), and the upper and lower punches are as wide as the front and rear punches, the front and rear left and right punches are as wide as the wood powder particle primary compact, the wood powder particle secondary compact, the wood powder particle compact, and the left and right punches are as wide as the wood powder particle secondary compact, the wood powder particle compact.
3. The isotropic wood particle board of claim 1, wherein the density difference between the various portions of the wood particle board is less than 0.01g/cm3。
4. An isotropic wood particle board as claimed in claim 1 wherein the forming process is carried out by bi-directional compaction of the powder body in all three dimensions, top to bottom, front to back and left to right, in the order of top to bottom, front to back and left to right.
5. The isotropic wood particle board of claim 1, wherein the steps 2), 3) and 4) are performed by artificial intelligence module control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710707326.1A CN107310011B (en) | 2017-08-17 | 2017-08-17 | Isotropic wood particle board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710707326.1A CN107310011B (en) | 2017-08-17 | 2017-08-17 | Isotropic wood particle board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107310011A CN107310011A (en) | 2017-11-03 |
| CN107310011B true CN107310011B (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710707326.1A Active CN107310011B (en) | 2017-08-17 | 2017-08-17 | Isotropic wood particle board |
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| CN100593462C (en) * | 2008-02-29 | 2010-03-10 | 上海大学 | Water-soluble polyalcohol, polyisocyanic acid ester and stalk fibrous composite material and preparation thereof |
| CN107030840B (en) * | 2017-05-27 | 2020-06-30 | 湖北中能木业有限公司 | Method for manufacturing artificial board by using wood leftover materials and straws |
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| US4385955A (en) * | 1981-09-08 | 1983-05-31 | Detroit Gasket | Method of forming contoured fiberglass sheet |
| KR100543369B1 (en) * | 1998-01-07 | 2006-01-20 | 엔바이로 보드 코퍼레이션 | Fiber panel manufacturing method and apparatus |
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