CN112342807A - Method for preparing fiberboard - Google Patents
Method for preparing fiberboard Download PDFInfo
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- CN112342807A CN112342807A CN202011312969.4A CN202011312969A CN112342807A CN 112342807 A CN112342807 A CN 112342807A CN 202011312969 A CN202011312969 A CN 202011312969A CN 112342807 A CN112342807 A CN 112342807A
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- blank
- fibers
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- 239000011094 fiberboard Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims description 14
- 239000000835 fiber Substances 0.000 claims abstract description 73
- 238000007731 hot pressing Methods 0.000 claims abstract description 39
- 239000002023 wood Substances 0.000 claims abstract description 37
- 239000003292 glue Substances 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000005520 cutting process Methods 0.000 claims abstract description 19
- 239000012188 paraffin wax Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 14
- 238000005507 spraying Methods 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 235000019270 ammonium chloride Nutrition 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 238000010411 cooking Methods 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000012792 core layer Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 239000010409 thin film Substances 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 244000166124 Eucalyptus globulus Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
- D21B1/061—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods using cutting devices
-
- 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
- B27N1/00—Pretreatment of moulding material
- B27N1/02—Mixing the material with binding agent
- B27N1/0209—Methods, e.g. characterised by the composition of the agent
-
- 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
- B27N3/10—Moulding of mats
- B27N3/12—Moulding of mats from fibres
-
- 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
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C7/00—Digesters
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention relates to a preparation method of a fiber board, which comprises the following steps: selecting materials; preparing wood chips, and stewing and softening; preparing fibers, feeding the cooked wood chips into a hot mill for fiber separation, and simultaneously adding molten paraffin into the mill, wherein the application amount of the paraffin is 6-8 kg/m3(ii) a Glue mixing, namely spraying glue stock in a pipeline for spraying the fibers, wherein the application amount of the glue stock is 200-230 kg of adhesive and 1-2 kg of ammonium chloride added into the fiberboard every 1m, and the components are uniformly mixed and sprayed to obtain a mixed material; drying, reducing water content8 to 10 percent; molding and prepressing: carrying out plate blank forming on the dried fiber, then carrying out plate blank prepressing, heating when the blank plate is prepressed, and controlling the temperature of the prepressed blank plate to be 45-50 ℃; hot pressing: carrying out hot pressing on the pre-pressed plate blank, and cooling after the hot pressing to obtain a rough plate; cutting edges, stacking and sanding to obtain the fiber board. The preparation method of the fiberboard provided by the invention has the advantages of high internal bonding strength and smooth and flat routing surface.
Description
Technical Field
The invention relates to a fiber board, in particular to a preparation method of the fiber board.
Background
The fiberboard has the advantages of light weight, high strength, uniform texture, fine structure, smooth surface, sound and heat insulation and good dimensional stability, and is widely applied to furniture manufacture, interior decoration of buildings, vehicles and ships, shells of household appliances and the like. The engraving and milling plate is a medium-density fiberboard which has higher density, fine texture and uniform structure compared with a common fiberboard and can be used for engraving and milling or high-performance furniture. But the existing fiber board has low internal bonding strength, soft and rough routing surface and fluffy appearance.
Disclosure of Invention
In order to solve the problems, the invention provides a preparation method of a fiberboard with high internal bonding strength and smooth and flat routing surface, which has the specific technical scheme that:
the preparation method of the fiberboard comprises the following steps:
s101, selecting materials, wherein the ratio of miscellaneous trees to fast-growing trees is 1: 1-4;
s102, preparing wood chips, namely feeding the wood into a chipper for chipping to obtain the wood chips;
s103, cooking and softening, namely adding the wood chips into a cooking cylinder, cooking for 4-8 min at the temperature of 160-180 ℃ and the pressure of 0.7-0.9 MPa;
s104, preparing fibers, namely feeding the cooked wood chips into a hot mill for fiber separation, and simultaneously adding molten paraffin into the mill, wherein the paraffin application amount is 6-8 kg/m3；
S105, glue mixing, namely spraying glue stock in a pipeline for fiber spraying, wherein the application amount of the glue stock is that 200-230 kg of the glue stock and 1-2 kg of ammonium chloride are added into the fiber board for each 1m of thin film, and the components are uniformly mixed and then sprayed to obtain a mixed material;
s106, drying, namely feeding the mixed material into a dryer for drying, and reducing the water content of the fibers to 8-10%;
s107, forming and prepressing: carrying out plate blank forming on the dried fiber, then carrying out plate blank prepressing, heating when the blank plate is prepressed, and controlling the temperature of the prepressed blank plate to be 45-50 ℃;
s108, hot pressing: carrying out hot pressing on the pre-pressed plate blank, and cooling after the hot pressing to obtain a rough plate; the hot pressing process parameters are as follows: the temperature of a pressing plate is 180-190 ℃, the pressure is 1-3 MPa, and the time is 300-400 s, so that a rough plate is obtained;
s109, cutting edges, stacking and sanding, cutting edges of the rough board, stacking the boards after cutting the edges for 72-120 hours, and sanding to obtain the fiber board.
Preferably, the tree ages of the miscellaneous trees and the fast-growing trees in the step S101 are 3-5 years, and the storage time after felling is 30-60 days.
Preferably, in the step S104, the fibers with the particle size of more than 200 meshes account for 5-10% of the total fiber weight, the fibers with the particle size of 150-200 meshes account for 30-50% of the total fiber weight, and the fibers with the particle size of 100-150 meshes account for 20-30% of the total fiber weight.
Preferably, in the step S108, the sealing curve in the hot pressing process is adjusted to make the sealing peak value be 1050-1100 kg/m3The peak density is ensured to be above 90% of the average density of the core layer.
Preferably, the inlet temperature of the dryer in the step S106 is 180 to 200 ℃, and the outlet temperature is 50 to 60 ℃.
Preferably, in the step S108, the hot pressing is divided into three sections, the pressure of the three sections is 3MPa, 2 MPa and 1 MPa in sequence, and the time is 100-150S.
Preferably, the water content of the slab in the step S107 is 8.3-8.7%.
Compared with the prior art, the invention has the following beneficial effects:
the preparation method of the fiberboard provided by the invention has the advantages of high internal bonding strength and smooth and flat routing surface.
Detailed Description
The present invention will now be further described with reference to examples.
Example one
The preparation method of the fiberboard comprises the following steps:
s101, selecting materials, wherein the ratio of miscellaneous trees to fast-growing trees is 1: 1;
s102, preparing wood chips, namely feeding the wood into a chipper for chipping to obtain the wood chips;
s103, cooking and softening, namely adding the wood chips into a cooking cylinder, cooking for 4min at the temperature of 160 ℃ and the pressure of 0.7 MPa;
s104, preparing fibers, namely feeding the cooked wood chips into a hot mill for fiber separation, and simultaneously adding molten paraffin into the mill, wherein the paraffin application amount is 6kg/m3；
S105, glue mixing, namely spraying glue stock in a pipeline sprayed by the fibers, wherein the application amount of the glue stock is that 200kg of the glue stock and 1kg of ammonium chloride are added into the fiber board every 1m, and the components are uniformly mixed and then sprayed to obtain a mixed material;
s106, drying, namely feeding the mixed material into a dryer for drying, and reducing the water content of the fibers to 8%;
s107, forming and prepressing: carrying out plate blank forming on the dried fiber, then carrying out plate blank prepressing, heating when the blank plate is prepressed, and controlling the temperature of the prepressed blank to be 45 ℃;
s108, hot pressing: carrying out hot pressing on the pre-pressed plate blank, and cooling after the hot pressing to obtain a rough plate; the hot pressing process parameters are as follows: pressing the plate at 180 ℃ under 1-3 MPa for 300-400 s to obtain a rough plate;
s109, cutting edges, stacking and sanding, cutting edges of the rough board, stacking the boards after cutting the edges for 72-120 hours, and sanding to obtain the fiber board.
In the step S101, the tree ages of the miscellaneous trees and the fast-growing trees are 3-5 years, and the storage time after felling is 30-60 days.
In the step S104, the fibers larger than 200 meshes account for 5-10% of the total fiber weight, the fibers of 150-200 meshes account for 30-50% of the total fiber weight, and the fibers of 100-150 meshes account for 20-30% of the total fiber weight.
In step S108, the sealing curve in the hot pressing process is adjusted to enable the sealing peak value to be 1050-1100 kg/m3The peak density is ensured to be above 90% of the average density of the core layer.
In the step S106, the inlet temperature of the dryer is 180-200 ℃, and the outlet temperature of the dryer is 50-60 ℃.
In the step S108, the hot pressing is divided into three sections, the pressure of the three sections is 3MPa, 2 MPa and 1 MPa in sequence, and the time is 100-150S.
In the step S107, the water content of the plate blank is 8.3-8.7%.
102, after preparing the wood chips, the wood chips are sent to a screening machine for screening, and impurities such as unqualified wood chips, barks, gravels and the like are removed.
The paraffin wax added in step S104 can be uniformly attached to the fiber surface, while the millstone can be effectively lubricated.
Example two
The preparation method of the fiberboard comprises the following steps:
s101, selecting materials, wherein the ratio of miscellaneous trees to fast-growing trees is 1: 2;
s102, preparing wood chips, namely feeding the wood into a chipper for chipping to obtain the wood chips;
s103, cooking and softening, namely adding the wood chips into a cooking cylinder, cooking for 8min at the temperature of 180 ℃ and under the pressure of 0.9 MPa;
s104, preparing fibers, namely feeding the cooked wood chips into a hot mill for fiber separation, and simultaneously adding molten paraffin into the mill, wherein the application amount of the paraffin is 8kg/m3；
S105, glue mixing, namely spraying glue stock in a pipeline sprayed by the fibers, wherein the application amount of the glue stock is 230kg of the glue stock and 2kg of ammonium chloride added into the fiber board every 1m, and uniformly mixing and spraying the components to obtain a mixed material;
s106, drying, namely feeding the mixed material into a dryer for drying, and reducing the water content of the fibers to 8-10%;
s107, forming and prepressing: carrying out plate blank forming on the dried fiber, then carrying out plate blank prepressing, heating when the blank plate is prepressed, and controlling the temperature of the prepressed blank plate to be 50 ℃;
s108, hot pressing: carrying out hot pressing on the pre-pressed plate blank, and cooling after the hot pressing to obtain a rough plate; the hot pressing process parameters are as follows: pressing the plate at 190 ℃ under 1-3 MPa for 300-400 s to obtain a rough plate;
s109, cutting edges, stacking and sanding, cutting edges of the rough board, stacking the boards after cutting the edges for 72-120 hours, and sanding to obtain the fiber board.
In the step S101, the tree ages of the miscellaneous trees and the fast-growing trees are 3-5 years, and the storage time after felling is 30-60 days.
In the step S104, the fibers larger than 200 meshes account for 5-10% of the total fiber weight, the fibers of 150-200 meshes account for 30-50% of the total fiber weight, and the fibers of 100-150 meshes account for 20-30% of the total fiber weight.
In step S108, the sealing curve in the hot pressing process is adjusted to enable the sealing peak value to be 1050-1100 kg/m3The peak density is ensured to be above 90% of the average density of the core layer.
In the step S106, the inlet temperature of the dryer is 180-200 ℃, and the outlet temperature of the dryer is 50-60 ℃.
In the step S108, the hot pressing is divided into three sections, the pressure of the three sections is 3MPa, 2 MPa and 1 MPa in sequence, and the time is 100-150S.
In the step S107, the water content of the plate blank is 8.3-8.7%.
EXAMPLE III
The preparation method of the fiberboard comprises the following steps:
s101, selecting materials, wherein the ratio of miscellaneous trees to fast-growing trees is 1: 3;
s102, preparing wood chips, namely feeding the wood into a chipper for chipping to obtain the wood chips;
s103, cooking and softening, namely adding the wood chips into a cooking cylinder, cooking for 5min at 175 ℃ and 0.8 MPa;
s104, preparing fibers, namely feeding the cooked wood chips into a hot mill for fiber separation, and simultaneously adding molten paraffin into the mill, wherein the application amount of the paraffin is 7kg/m3；
S105, glue mixing, namely spraying glue stock in a pipeline for fiber spraying, wherein the application amount of the glue stock is that 215kg of the glue stock and 1.5kg of ammonium chloride are added into the fiberboard for every 1m, and the components are uniformly mixed and then sprayed to obtain a mixed material;
s106, drying, namely feeding the mixed material into a dryer for drying, and reducing the water content of the fiber to 9%;
s107, forming and prepressing: carrying out plate blank forming on the dried fiber, then carrying out plate blank prepressing, heating when the blank plate is prepressed, and controlling the temperature of the prepressed blank plate to be 48 ℃;
s108, hot pressing: carrying out hot pressing on the pre-pressed plate blank, and cooling after the hot pressing to obtain a rough plate; the hot pressing process parameters are as follows: pressing the plate at 188 ℃ under 1-3 MPa for 300-400 s to obtain a rough plate;
s109, cutting edges, stacking and sanding, cutting edges of the rough board, stacking the boards after cutting the edges for 72-120 hours, and sanding to obtain the fiber board.
In the step S101, the tree ages of the miscellaneous trees and the fast-growing trees are 3-5 years, and the storage time after felling is 30-60 days.
In the step S104, the fibers larger than 200 meshes account for 5-10% of the total fiber weight, the fibers of 150-200 meshes account for 30-50% of the total fiber weight, and the fibers of 100-150 meshes account for 20-30% of the total fiber weight.
In step S108, the sealing curve in the hot pressing process is adjusted to enable the sealing peak value to be 1050-1100 kg/m3The peak density is ensured to be above 90% of the average density of the core layer.
In the step S106, the inlet temperature of the dryer is 180-200 ℃, and the outlet temperature of the dryer is 50-60 ℃.
In the step S108, the hot pressing is divided into three sections, the pressure of the three sections is 3MPa, 2 MPa and 1 MPa in sequence, and the time is 100-150S.
In the step S107, the water content of the plate blank is 8.3-8.7%.
Example four
The preparation method of the fiberboard comprises the following steps:
s101, selecting materials, wherein the ratio of miscellaneous trees to fast-growing trees is 1: 4;
s102, preparing wood chips, namely feeding the wood into a chipper for chipping to obtain the wood chips;
s103, cooking and softening, namely adding the wood chips into a cooking cylinder, cooking for 6min at the temperature of 166 ℃ and the pressure of 0.86 MPa;
s104, preparing fibers, namely feeding the cooked wood chips into a hot mill for fiber separation, and simultaneously adding molten paraffin into the mill, wherein the application amount of the paraffin is 8kg/m3；
S105, glue mixing, namely spraying glue stock in a pipeline for fiber spraying, wherein the application amount of the glue stock is 225kg of adhesive and 1.6kg of ammonium chloride are added into the fiber board every 1m, and the components are uniformly mixed and then sprayed to obtain a mixed material;
s106, drying, namely feeding the mixed material into a dryer for drying, and reducing the water content of the fiber to 9.3%;
s107, forming and prepressing: carrying out plate blank forming on the dried fiber, then carrying out plate blank prepressing, heating when the blank plate is prepressed, and controlling the temperature of the prepressed blank plate to be 47 ℃;
s108, hot pressing: carrying out hot pressing on the pre-pressed plate blank, and cooling after the hot pressing to obtain a rough plate; the hot pressing process parameters are as follows: pressing the plate at 183 ℃, under 1-3 MPa for 300-400 s to obtain a rough plate;
s109, cutting edges, stacking and sanding, cutting edges of the rough board, stacking the boards after cutting the edges for 72-120 hours, and sanding to obtain the fiber board.
In the step S101, the tree ages of the miscellaneous trees and the fast-growing trees are 3-5 years, and the storage time after felling is 30-60 days.
In the step S104, the fibers larger than 200 meshes account for 5-10% of the total fiber weight, the fibers of 150-200 meshes account for 30-50% of the total fiber weight, and the fibers of 100-150 meshes account for 20-30% of the total fiber weight.
In step S108, the sealing curve in the hot pressing process is adjusted to enable the sealing peak value to be 1050-1100 kg/m3The peak density is ensured to be above 90% of the average density of the core layer.
In the step S106, the inlet temperature of the dryer is 180-200 ℃, and the outlet temperature of the dryer is 50-60 ℃.
In the step S108, the hot pressing is divided into three sections, the pressure of the three sections is 3MPa, 2 MPa and 1 MPa in sequence, and the time is 100-150S.
In the step S107, the water content of the plate blank is 8.3-8.7%.
The performance test of the plate is carried out, and the test result is shown in the table I.
| Density kg/m3 | Internal bond strength MPa | Static bending strength MPa | Surface bonding strength MPa | Water absorption swelling ratio% | |
| Example one | 792 | 1.5 | 37.15 | 1.6 | 4.2 |
| Example two | 783 | 1.42 | 36.32 | 1.44 | 4.8 |
| EXAMPLE III | 777 | 1.38 | 33.21 | 1.26 | 5.2 |
| Example four | 786 | 1.29 | 34.56 | 1.35 | 4.5 |
The fast-growing wood can be eucalyptus. When the wood shavings are sliced, the tree species with similar material properties and density are selected as much as possible, so that the deformation degree is approximate, and the deformation is prevented.
The fiber comes out from the drying pipeline, and along with the transport of each pipeline, the continuous decline of fiber moisture content and temperature leads to the prepressing effect of mating formation poor, and slab thickness is greater than 90mm basically. Through heating the pre-compaction, the temperature of the plate blank after the pre-compaction is paved is basically maintained at about 47 ℃, the water content is basically maintained at about 8.5%, and the thickness of the plate blank is basically controlled at 6-7 mm, so that the closing time of a press can be shortened, the thickness of a pre-solidified layer of the plate surface is well reduced, the cost is reduced, and the quality of the plate surface is improved.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, which shall fall within the scope of the appended claims.
Claims (7)
1. The preparation method of the fiberboard is characterized by comprising the following steps:
s101, selecting materials, wherein the ratio of miscellaneous trees to fast-growing trees is 1: 1-4;
s102, preparing wood chips, namely feeding the wood into a chipper for chipping to obtain the wood chips;
s103, cooking and softening, namely adding the wood chips into a cooking cylinder, cooking for 4-8 min at the temperature of 160-180 ℃ and the pressure of 0.7-0.9 MPa;
s104, preparing fibers, namely feeding the cooked wood chips into a hot mill for fiber separation, and simultaneously adding molten paraffin into the mill, wherein the paraffin application amount is 6-8 kg/m3；
S105, glue mixing, namely spraying glue stock in a pipeline for fiber spraying, wherein the application amount of the glue stock is that 200-230 kg of the glue stock and 1-2 kg of ammonium chloride are added into the fiber board for each 1m of thin film, and the components are uniformly mixed and then sprayed to obtain a mixed material;
s106, drying, namely feeding the mixed material into a dryer for drying, and reducing the water content of the fibers to 8-10%;
s107, forming and prepressing: carrying out plate blank forming on the dried fiber, then carrying out plate blank prepressing, heating when the blank plate is prepressed, and controlling the temperature of the prepressed blank plate to be 45-50 ℃;
s108, hot pressing: carrying out hot pressing on the pre-pressed plate blank, and cooling after the hot pressing to obtain a rough plate; the hot pressing process parameters are as follows: the temperature of a pressing plate is 180-190 ℃, the pressure is 1-3 MPa, and the time is 300-400 s, so that a rough plate is obtained;
s109, cutting edges, stacking and sanding, cutting edges of the rough board, stacking the boards after cutting the edges for 72-120 hours, and sanding to obtain the fiber board.
2. The method of manufacturing a fiberboard of claim 1,
in the step S101, the tree ages of the miscellaneous trees and the fast-growing trees are 3-5 years, and the storage time after felling is 30-60 days.
3. The method of manufacturing a fiberboard of claim 1,
in the step S104, the fibers larger than 200 meshes account for 5-10% of the total fiber weight, the fibers of 150-200 meshes account for 30-50% of the total fiber weight, and the fibers of 100-150 meshes account for 20-30% of the total fiber weight.
4. The method of manufacturing a fiberboard of claim 1,
in the step S108, the sealing curve in the hot pressing process is adjusted to enable the sealing peak value to be 1050-1100 kg/m3The peak density is ensured to be above 90% of the average density of the core layer.
5. The method of manufacturing a fiberboard of claim 1,
in the step S106, the inlet temperature of the dryer is 180-200 ℃, and the outlet temperature of the dryer is 50-60 ℃.
6. The method of manufacturing a fiberboard of claim 1,
in the step S108, the hot pressing is divided into three sections, the pressure of the three sections is 3MPa, 2 MPa and 1 MPa in sequence, and the time is 100-150S.
7. The method of manufacturing a fiberboard of claim 1,
and in the step S107, the water content of the plate blank is 8.3-8.7%.
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| CN202011312969.4A CN112342807A (en) | 2020-11-20 | 2020-11-20 | Method for preparing fiberboard |
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| CN202011312969.4A CN112342807A (en) | 2020-11-20 | 2020-11-20 | Method for preparing fiberboard |
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| CN112342807A true CN112342807A (en) | 2021-02-09 |
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| CN202011312969.4A Pending CN112342807A (en) | 2020-11-20 | 2020-11-20 | Method for preparing fiberboard |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112976218A (en) * | 2021-02-27 | 2021-06-18 | 田宁刚 | Manufacturing method of medium density fiberboard |
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