CN114211574A - Composite artificial board and manufacturing method thereof - Google Patents
Composite artificial board and manufacturing method thereof Download PDFInfo
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- CN114211574A CN114211574A CN202111560849.0A CN202111560849A CN114211574A CN 114211574 A CN114211574 A CN 114211574A CN 202111560849 A CN202111560849 A CN 202111560849A CN 114211574 A CN114211574 A CN 114211574A
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- 239000002131 composite material Substances 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 239000010410 layer Substances 0.000 claims abstract description 221
- 239000002023 wood Substances 0.000 claims abstract description 179
- 239000000843 powder Substances 0.000 claims abstract description 103
- 238000000034 method Methods 0.000 claims abstract description 69
- 229920001342 Bakelite® Polymers 0.000 claims abstract description 64
- 239000004637 bakelite Substances 0.000 claims abstract description 64
- 239000012792 core layer Substances 0.000 claims abstract description 48
- 230000008569 process Effects 0.000 claims abstract description 29
- 238000005096 rolling process Methods 0.000 claims abstract description 15
- 239000003292 glue Substances 0.000 claims description 93
- 238000007731 hot pressing Methods 0.000 claims description 57
- 239000000839 emulsion Substances 0.000 claims description 32
- 235000013312 flour Nutrition 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 238000000465 moulding Methods 0.000 claims description 18
- 108010073771 Soybean Proteins Proteins 0.000 claims description 16
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 16
- 239000011118 polyvinyl acetate Substances 0.000 claims description 16
- 235000019710 soybean protein Nutrition 0.000 claims description 16
- 238000007517 polishing process Methods 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 12
- 244000166124 Eucalyptus globulus Species 0.000 claims description 10
- 241000219000 Populus Species 0.000 claims description 10
- 238000005498 polishing Methods 0.000 claims description 9
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 8
- 235000018185 Betula X alpestris Nutrition 0.000 claims description 8
- 235000018212 Betula X uliginosa Nutrition 0.000 claims description 8
- 239000004640 Melamine resin Substances 0.000 claims description 8
- 229920000877 Melamine resin Polymers 0.000 claims description 8
- 241000124033 Salix Species 0.000 claims description 8
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 8
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 claims description 8
- 229920001568 phenolic resin Polymers 0.000 claims description 8
- 239000005011 phenolic resin Substances 0.000 claims description 8
- 239000004814 polyurethane Substances 0.000 claims description 8
- 229920002635 polyurethane Polymers 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 235000009508 confectionery Nutrition 0.000 claims description 6
- 229920005546 furfural resin Polymers 0.000 claims description 6
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 239000002356 single layer Substances 0.000 claims description 6
- 239000002344 surface layer Substances 0.000 claims description 6
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 5
- 235000011613 Pinus brutia Nutrition 0.000 claims description 5
- 241000018646 Pinus brutia Species 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 4
- 238000003892 spreading Methods 0.000 claims description 3
- 230000007480 spreading Effects 0.000 claims description 3
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 8
- 239000011094 fiberboard Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 239000011120 plywood Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 235000010204 pine bark Nutrition 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 229920000538 Poly[(phenyl isocyanate)-co-formaldehyde] Polymers 0.000 description 2
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Images
Classifications
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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
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
-
- 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
- B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
-
- 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
- B27N3/06—Making particle boards or fibreboards, with preformed covering layers, the particles or fibres being compressed with the layers to a board in one single pressing operation
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/02—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board the layer being formed of fibres, chips, or particles, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/13—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board all layers being exclusively wood
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
A composite artificial board and a manufacturing method thereof belong to the technical field of artificial board production and manufacturing. The laminated wood floor is divided into a three-layer structure or a five-layer structure, wherein the three-layer structure comprises an upper mixed bakelite powder layer, a middle core layer wood skin layer and a lower mixed bakelite powder layer, one surface of the middle core layer wood skin layer is connected with the upper mixed bakelite powder layer, the other surface of the middle core layer wood skin layer is connected with the lower mixed bakelite powder layer, the five-layer structure sequentially comprises an upper mixed bakelite powder layer, a lower mixed bakelite powder layer, a middle core layer wood skin layer, a near-end mixed bakelite wood chip layer and a near-end wood chip layer, the two sides of the middle core layer wood skin layer are respectively connected with the near-end mixed bakelite wood chip layer and the near-end wood chip layer, the near-end mixed bakelite powder layer is connected with the upper mixed bakelite powder layer, and the near-end wood chip layer is connected with the lower mixed bakelite powder layer. The invention can avoid the sawing process after continuous rolling, reduce the surface damage in the sawing process and effectively reduce the breakage rate of the plate.
Description
Technical Field
The invention relates to a composite artificial board and a manufacturing method thereof, belonging to the technical field of artificial board production and manufacturing.
Background
In a developing country with a large population and seriously deficient forest resources in China, the forest coverage rate is 18.12 percent, and the per-capita forest resource ownership rate is less than one tenth of the average level in the world. Along with the rapid development of national economy and the rapid improvement of the quality of life of people in China, the demand of wood becomes one of the most shortage resources in China.
Under the condition that the forest resources which can be harvested in the world are in shortage day by day, the remainder of a deep forest, a sub-small firewood, an artificial fast-growing high-yield forest and other resources are fully utilized, and the performance of the forest can reach the woody quality of perennial growth through manufacturing and processing so as to replace wood products of logs and large-diameter woods, thereby protecting natural forest resources and meeting different requirements of social development on forest products. The artificial board is the birth of this important scientific research result, and opens up the new generation of the kingdom of wood materials.
The production of plywood needs high-quality large-diameter timber, is restricted by resource reproducibility, and the supply resource is exhausted, and most countries in the world are under the consideration of ecological protection, so that the export of logs is limited, and the government controls the consumption by means of increasing consumption additional taxes and the like. The plywood is formed by compounding in a rotary cutting mode, so that the deformation influence caused by the tension of the wood is difficult to overcome. Therefore, the specific gravity of the production and consumption of the Chinese plywood is in a trend of decreasing year by year.
The production of the fiber board and the particle board takes 'minor and small' salaries as raw materials, is suitable for the characteristics of regeneration and quick growth of Chinese resources, and the supply also enjoys the support of national policies, so that the contradiction of resource supply is not outstanding. With the acceptance of the quality of fiber boards and particle boards, the improvement of product cost performance and the expansion of application fields, the production and consumption proportion of the fiber boards and the particle boards gradually rises, and the fiber boards and the particle boards also become mainstream of the wood market demand.
However, fiber boards and particle boards do have disadvantages in practical applications. Firstly, the static bending strength and the elastic modulus of the two boards are smaller than those of plywood, and secondly, the nail holding force of the boards is far smaller than that of the plywood. In practical application, the shaving boards smaller than 9mm are relatively rare in the market, the production difficulty is high, and the stiffness of the fiber boards smaller than 9mm is poor, so that the shaving boards and the fiber boards smaller than 9mm are rarely used as back boards in the furniture customization industry.
In 2021, few enterprises develop shaving boards with a thickness of less than 9mm, but the qualification rate of the produced boards needs to be further improved due to the reasons that the saw cutting damage rate is high after roll forming, the boards are easy to break after hot pressing and the like in the production process. In addition, the thin plate is easy to break off in the application process, and the nail-holding power is extremely low, so that the large-scale application is difficult to realize.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a composite artificial board and a manufacturing method thereof.
A composite artificial board is divided into three or five layers, wherein the three layers are upper mixed bakelite powder layer, middle core layer wood skin layer and lower mixed bakelite powder layer, one side of the middle core layer wood skin layer is connected with the upper mixed bakelite powder layer, the other side of the middle core layer wood skin layer is connected with the lower mixed bakelite powder layer,
the five-layer structure sequentially comprises an upper mixed bakelite powder layer, a lower mixed bakelite powder layer, a middle core layer wood skin layer, a near-end mixed bakelite wood chip layer and a near-end wood chip layer, wherein the two sides of the middle core layer wood skin layer are respectively connected with the near-end mixed bakelite wood chip layer and the near-end wood chip layer, the near-end mixed bakelite wood chip layer is connected with the upper mixed bakelite powder layer, and the near-end wood chip layer is connected with the lower mixed bakelite powder layer.
The upper glue-mixed wood powder layer and the lower glue-mixed wood powder layer of the three-layer structure are formed by directly hot-pressing wood powder on the surface of a middle core layer veneer after glue mixing.
A manufacturing method of a composite artificial board with a three-layer structure comprises the following steps: the middle wood veneer layer of the three-layer structure is connected with the upper and lower wood powder layers; the upper glue-mixed wood powder layer and the lower glue-mixed wood powder layer of the three-layer structure are formed by directly hot-pressing wood powder on the surface of a middle core layer veneer after glue mixing; comprises selecting wood skin, preparing composite board with three-layer structure comprising wood powder layer at upper and lower layers and wood skin at middle layer by mixing wood powder with glue, spreading, pre-pressing, hot-pressing and polishing,
the wood flour glue mixing process comprises the steps of feeding 40-100 meshes of wood flour into a glue mixer after metering, feeding glue into the glue mixer through a nozzle, forming glue mixing powder after high-speed mixing, paving,
paving, namely uniformly paving the bottom layer wood powder on a conveying belt according to the measurement, placing wood veneers on the conveying belt, continuously paving the upper layer powder, prepressing,
the prepressing process comprises the steps of adopting a shaving board production line for rolling process for molding, adopting a cold press for single-sheet or multi-sheet prepressing molding, preferably rolling molding, then hot pressing,
hot pressing process, which comprises hot pressing with single-layer or multi-layer press, and hot pressing with flat hot pressing line with hot pressing pressure of 5-10Mpa and hot pressing time of 1.0-2.0min/mm (calculated according to the thickness of the surface layer),
the middle core layer is wood veneer, or poplar veneer, eucalyptus veneer, pine veneer, willow veneer, birch veneer, ash bark, ice candy veneer, and scientific veneer, the wood veneer is long medium plate veneer, or spliced veneer,
polishing the surface of the composite board after the polishing process step and the hot pressing process step to obtain the three-layer composite artificial board,
the glue is one or more of water-based polyvinyl acetate emulsion, water-based acrylic emulsion, soybean protein glue, water-based polyurethane emulsion, urea-formaldehyde resin, phenolic resin, melamine resin, furfural resin, EVA resin, MDI and PDI, and the glue is preferably the soybean protein glue and the polyvinyl acetate emulsion.
A composite five-layer artificial board is prepared by sequentially hot pressing a mixed bakelite powder layer, an upper mixed-bakelite sawdust layer, a lower mixed-bakelite sawdust layer and a lower mixed-bakelite powder layer on the surface of a middle core layer veneer; comprises selecting wood veneer, preparing a composite board with five layers of structures including an upper glue-mixing wood powder layer, a lower glue-mixing wood powder layer, a middle core layer wood veneer layer, a near-end glue-mixing wood chip layer and a near-end wood chip layer in sequence through a wood powder glue-mixing process step, a wood chip glue-mixing process step, a paving process step, a pre-pressing process step, a hot-pressing process step and a polishing process step,
the wood flour glue mixing process comprises the steps of feeding 40-100 meshes of wood flour into a glue mixer after metering, feeding glue into the glue mixer through a nozzle, forming glue mixing powder after high-speed mixing, paving,
the sawdust glue mixing process comprises metering sawdust of more than 10 meshes, feeding into a glue mixer, feeding glue into the glue mixer through a nozzle, mixing at high speed to form glue-mixed sawdust, spreading,
paving, namely uniformly paving bottom layer wood flour on a conveying belt according to a certain amount, uniformly paving glue-mixed wood flour on the bottom layer wood flour, placing the glued wood skin on the glue-mixed wood flour, continuously paving an upper layer wood flour layer and a wood flour layer, prepressing,
the prepressing process comprises the steps of adopting a shaving board production line for rolling process for molding, adopting a cold press for single-sheet or multi-sheet prepressing molding, preferably rolling molding, then hot pressing,
hot pressing process, which comprises hot pressing with single-layer or multi-layer press or flat pressing line under 7-12Mpa for 1.0-2.0min/mm (calculated according to the thickness of the surface layer),
the middle core layer is wood veneer, or poplar veneer, eucalyptus veneer, pine veneer, willow veneer, birch veneer, ash bark, ice candy veneer, and scientific wood veneer, the wood veneer is long medium plate veneer, or spliced veneer,
polishing the surface of the composite board after the polishing process step and the hot pressing process step to obtain the five-layer composite artificial board,
the glue is one or more of water-based polyvinyl acetate emulsion, water-based acrylic emulsion, soybean protein glue, water-based polyurethane emulsion, urea-formaldehyde resin, phenolic resin, melamine resin, furfural resin, EVA resin, MDI and PDI, and the glue is preferably the soybean protein glue and the polyvinyl acetate emulsion.
The invention has the advantages that the combination mode mainly aims to ensure that the longitudinal load strength of the particle board or the density board is not high and the board breaking phenomenon is easy to occur in the production process of the thin board; and secondly, after the sandwich uses the veneer, the sawing process after continuous rolling is not used, so that the surface damage in the sawing process is reduced, and the breakage rate of the plate can be effectively reduced.
Drawings
A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein the accompanying drawings are included to provide a further understanding of the invention and form a part of this specification, and wherein the illustrated embodiments of the invention and the description thereof are intended to illustrate and not limit the invention, as illustrated in the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the structure of the present invention.
FIG. 2 is a schematic diagram of the structure of the present invention.
The invention is further illustrated with reference to the following figures and examples.
Detailed Description
It will be apparent that those skilled in the art can make many modifications and variations based on the spirit of the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element, component or section is referred to as being "connected" to another element, component or section, it can be directly connected to the other element or section or intervening elements or sections may also be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art.
The following examples are further illustrative in order to facilitate the understanding of the embodiments, and the present invention is not limited to the examples.
Example 1: as shown in fig. 1, a composite artificial board includes an upper mixed bakelite powder layer 1, a lower mixed bakelite powder layer 2, a middle core layer 3, and the middle core layer 3 is a wood skin layer.
One side of the middle core layer 3 is connected with the upper mixed bakelite powder layer 1, the other side of the middle core layer 3 is connected with the lower mixed bakelite powder layer 2, and the middle core layer 3 is connected between the upper mixed bakelite powder layer 1 and the lower mixed bakelite powder layer 2.
The upper mixed bakelite powder layer 1 and the lower mixed bakelite powder layer 2 are formed into a compact wood layer with the density of more than 650kg/m3 through 40-200 meshes of wood powder, mixing with glue, performing cold pressing and hot pressing, and polishing to obtain the wood layer with the thickness of 0.01-1.5 mm.
The glue can be one or more of water-based polyvinyl acetate emulsion, water-based acrylic emulsion, soybean protein glue, water-based polyurethane emulsion, urea-formaldehyde resin, phenolic resin, melamine resin, MDI and PMDI, and the soybean protein glue and the polyvinyl acetate emulsion are preferred.
The middle core layer 3 is made of poplar bark, eucalyptus bark, birch bark, willow bark, oak bark, pine bark, etc., preferably eucalyptus bark and poplar bark.
Example 2: as shown in fig. 2, a composite artificial board comprises an upper mixed bakelite powder layer 1, a lower mixed bakelite powder layer 5, a middle core layer wood skin layer 3, a near-end mixed bakelite sawdust layer 2 and a near-end sawdust layer 4 on both sides of the near end of the wood layer.
One side of the middle core layer 3 is connected with the near-end glue-mixing wood chip layer 2 and then connected with the upper glue-mixing wood powder layer 1, and the other side of the middle core layer 3 is connected with the near-end wood chip layer 4 and then connected with the lower glue-mixing wood powder layer 5 to form a stable structure.
The upper mixed bakelite powder layer 1 and the lower mixed bakelite powder layer 5 are formed by mixing 40-200-mesh wood powder and 10-mesh wood chips in the mixed bakelite powder layer 2 and 4, forming a compact five-layer structure with the density of more than 650kg/m3 through cold pressing and hot pressing processes, and polishing the wood layer to the thickness of 0.01-3 mm.
The glue can be one or more of water-based polyvinyl acetate emulsion, water-based acrylic emulsion, soybean protein glue, water-based polyurethane emulsion, urea-formaldehyde resin, phenolic resin, melamine resin, MDI and PMDI, and the soybean protein glue and the polyvinyl acetate emulsion are preferred.
The middle core layer 3 is made of poplar bark, eucalyptus bark, birch bark, willow bark, oak bark, pine bark, etc., preferably eucalyptus bark and poplar bark.
Example 3: as shown in fig. 1 and 2, a composite artificial board has a three-layer or five-layer structure, wherein the three-layer structure includes an upper wood powder layer, a middle core layer wood skin layer, and a lower wood powder layer, one side of the middle wood skin layer is connected with the upper adhesive-coated wood powder layer, the other side of the middle core layer is connected with the lower adhesive-coated wood powder layer, and the wood skin middle core layer is connected between the upper adhesive-coated wood powder layer and the lower adhesive-coated wood powder layer; the five-layer structure sequentially comprises an upper mixed bakelite powder layer, a lower mixed bakelite powder layer, a middle core layer wood skin layer, a near-end mixed bakelite wood chip layer and a near-end wood chip layer, wherein the two sides of the middle core layer wood skin layer are connected with the mixed bakelite wood chip layer, and the wood chip layer is connected with the mixed bakelite powder layer to form the stable five-layer structure. The method comprises the steps of selecting a proper wood veneer, and manufacturing a total three-layer or five-layer structure through a wood powder glue mixing process step (the five-layer structure is the wood powder and wood dust glue mixing process step), a paving process step, a pre-pressing process step, a hot pressing process step and a polishing process step. The invention has the advantages that the combination mode mainly aims to ensure that the longitudinal load strength of the particle board or the density board is not high and the board breaking phenomenon is easy to occur in the production process of the thin board; and secondly, after the sandwich uses the veneer, the sawing process after continuous rolling is not used, so that the surface damage in the sawing process is reduced, and the breakage rate of the plate can be effectively reduced.
Example 4: as shown in fig. 1 and 2, a method for manufacturing a composite artificial board with a three-layer structure comprises the following steps: the middle wood veneer layer of the three-layer structure is connected with the upper and lower wood powder layers; the upper glue-mixed wood powder layer and the lower glue-mixed wood powder layer of the three-layer structure are formed by directly hot-pressing wood powder on the surface of a middle core layer veneer after glue mixing; the method comprises the steps of selecting wood veneers, and manufacturing the composite board by the steps of a wood powder glue mixing process step, a paving process step, a prepressing process step, a hot pressing process step and a polishing process step, wherein the composite board is totally composed of three layers, the upper layer and the lower layer are both wood powder layers, and the middle core layer is the wood veneer.
The wood flour glue mixing process comprises the steps that wood flour of 40-100 meshes is metered and then enters a glue mixer, meanwhile, glue enters the glue mixer through a nozzle, glue mixing powder is formed after high-speed mixing, and then paving is carried out.
Paving, namely uniformly paving the bottom layer wood powder on a conveying belt according to the measurement, placing wood veneers on the conveying belt, continuously paving the upper layer powder, and pre-pressing.
The prepressing process comprises the steps of adopting a shaving board production line for rolling and molding, adopting a cold press for single-sheet or multi-sheet prepressing and molding, preferably rolling and molding, and then carrying out hot pressing.
Hot pressing process, which adopts a single-layer or multi-layer press for hot pressing, or adopts a flat-pressing hot-pressing line for hot pressing, wherein the hot pressing pressure is controlled at 5-10Mpa, and the hot pressing time is 1.0-2.0min/mm (calculated according to the thickness of the surface layer).
The middle core layer is wood veneer, such as poplar veneer, eucalyptus veneer, pine veneer, willow veneer, birch veneer, ash bark, ice candy veneer, scientific veneer, etc., and the wood veneer can be a long medium plate veneer or a spliced veneer.
Polishing the surface of the composite board after the polishing process step and the hot pressing process step to obtain the three-layer composite artificial board.
The glue is one or more of water-based polyvinyl acetate emulsion, water-based acrylic emulsion, soybean protein glue, water-based polyurethane emulsion, urea-formaldehyde resin, phenolic resin, melamine resin, furfural resin, EVA resin, MDI, PDI and the like, and the glue is preferably the soybean protein glue and the polyvinyl acetate emulsion.
Example 5: as shown in fig. 1 and 2, a manufacturing method of a composite type five-layer structure artificial board includes hot-pressing a mixed bakelite powder layer, an upper mixed bakelite sawdust layer, a lower mixed bakelite sawdust layer and a lower mixed bakelite powder layer on the surface of a middle core layer veneer in sequence; the method comprises the steps of selecting wood veneers, and manufacturing the composite board by a wood powder glue mixing process step, a wood chip glue mixing process step, a paving process step, a pre-pressing process step, a hot pressing process step and a polishing process step, wherein the composite board is formed by five layers of structures, namely an upper glue mixing wood powder layer, a lower glue mixing wood powder layer, a middle core layer wood veneer layer, a near-end glue mixing wood chip layer and a near-end wood chip layer.
The wood flour glue mixing process comprises the steps that wood flour of 40-100 meshes is metered and then enters a glue mixer, meanwhile, glue enters the glue mixer through a nozzle, glue mixing powder is formed after high-speed mixing, and then paving is carried out.
The sawdust glue mixing process comprises the steps that sawdust of more than 10 meshes is metered and then enters a glue mixer, meanwhile, glue enters the glue mixer through a nozzle, glue mixing sawdust is formed after high-speed mixing, and then the sawdust is paved.
And paving, namely uniformly paving the bottom layer wood flour on a conveying belt according to the measurement, uniformly paving the glue-mixed wood flour on the bottom layer wood flour, placing the glued wood skin on the glue-mixed wood flour, continuously paving the upper layer wood flour and the wood flour layer, and prepressing.
The prepressing process comprises the steps of adopting a shaving board production line for rolling and molding, adopting a cold press for single-sheet or multi-sheet prepressing and molding, preferably rolling and molding, and then carrying out hot pressing.
Hot pressing process, which adopts a single-layer or multi-layer press for hot pressing, or adopts a flat-pressing hot-pressing line for hot pressing, wherein the hot pressing pressure is controlled at 7-12Mpa, and the hot pressing time is 1.0-2.0min/mm (calculated according to the thickness of the surface layer).
The middle core layer is made of wood bark, such as poplar bark, eucalyptus bark, pine bark, willow bark, birch bark, ash bark, ice candy bark, scientific wood bark, long medium plate veneer or spliced veneer.
Polishing the surface of the composite board after the polishing process step and the hot pressing process step to obtain the five-layer composite artificial board.
The glue is one or more of water-based polyvinyl acetate emulsion, water-based acrylic emulsion, soybean protein glue, water-based polyurethane emulsion, urea-formaldehyde resin, phenolic resin, melamine resin, furfural resin, EVA resin, MDI, PDI and the like, and the glue is preferably the soybean protein glue and the polyvinyl acetate emulsion.
As described above, although the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that many modifications are possible without substantially departing from the spirit and scope of the present invention. Therefore, such modifications are also all included in the scope of protection of the present invention.
Claims (4)
1. A composite artificial board is characterized by being divided into three or five layers, wherein the three layers are an upper mixed bakelite powder layer, a middle core layer wood skin layer and a lower mixed bakelite powder layer, one surface of the middle core layer wood skin layer is connected with the upper mixed bakelite powder layer, the other surface of the middle core layer wood skin layer is connected with the lower mixed bakelite powder layer,
the five-layer structure sequentially comprises an upper mixed bakelite powder layer, a lower mixed bakelite powder layer, a middle core layer wood skin layer, a near-end mixed bakelite wood chip layer and a near-end wood chip layer, wherein the two sides of the middle core layer wood skin layer are respectively connected with the near-end mixed bakelite wood chip layer and the near-end wood chip layer, the near-end mixed bakelite wood chip layer is connected with the upper mixed bakelite powder layer, and the near-end wood chip layer is connected with the lower mixed bakelite powder layer.
2. The composite artificial board according to claim 1, wherein the upper and lower adhesive-coated wood powder layers of the three-layer structure are directly hot-pressed on the surface of the middle core veneer after the wood powder is adhesive-coated.
3. A manufacturing method of a composite artificial board with a three-layer structure comprises the following steps: the middle wood veneer layer of the three-layer structure is connected with the upper and lower wood powder layers; the upper glue-mixed wood powder layer and the lower glue-mixed wood powder layer of the three-layer structure are formed by directly hot-pressing wood powder on the surface of a middle core layer veneer after glue mixing; the method is characterized by comprising the steps of selecting wood veneers, preparing the composite board by a wood powder glue mixing process step, a paving process step, a prepressing process step, a hot pressing process step and a polishing process step, wherein the composite board is formed by three layers in total, the upper layer and the lower layer are both wood powder layers, the middle core layer is the wood veneer,
the wood flour glue mixing process comprises the steps of feeding 40-100 meshes of wood flour into a glue mixer after metering, feeding glue into the glue mixer through a nozzle, forming glue mixing powder after high-speed mixing, paving,
paving, namely uniformly paving the bottom layer wood powder on a conveying belt according to the measurement, placing wood veneers on the conveying belt, continuously paving the upper layer powder, prepressing,
the prepressing process comprises the steps of adopting a shaving board production line for rolling process for molding, adopting a cold press for single-sheet or multi-sheet prepressing molding, preferably rolling molding, then hot pressing,
hot pressing process, which comprises hot pressing with single-layer or multi-layer press, and hot pressing with flat hot pressing line with hot pressing pressure of 5-10Mpa and hot pressing time of 1.0-2.0min/mm (calculated according to the thickness of the surface layer),
the middle core layer is wood veneer, or poplar veneer, eucalyptus veneer, pine veneer, willow veneer, birch veneer, ash bark, ice candy veneer, and scientific veneer, the wood veneer is long medium plate veneer, or spliced veneer,
polishing the surface of the composite board after the polishing process step and the hot pressing process step to obtain the three-layer composite artificial board,
the glue is one or more of water-based polyvinyl acetate emulsion, water-based acrylic emulsion, soybean protein glue, water-based polyurethane emulsion, urea-formaldehyde resin, phenolic resin, melamine resin, furfural resin, EVA resin, MDI and PDI, and the glue is preferably the soybean protein glue and the polyvinyl acetate emulsion.
4. A composite five-layer artificial board is prepared by sequentially hot pressing a mixed bakelite powder layer, an upper mixed-bakelite sawdust layer, a lower mixed-bakelite sawdust layer and a lower mixed-bakelite powder layer on the surface of a middle core layer veneer; the method is characterized by comprising the steps of selecting wood veneers, manufacturing the composite board by a wood powder glue mixing process step, a wood chip glue mixing process step, a paving process step, a pre-pressing process step, a hot pressing process step and a polishing process step, wherein the composite board is formed by five layers of structures which are an upper glue mixing wood powder layer, a lower glue mixing wood powder layer, a middle core layer wood skin layer, a near end glue mixing wood chip layer and a near end wood chip layer in sequence,
the wood flour glue mixing process comprises the steps of feeding 40-100 meshes of wood flour into a glue mixer after metering, feeding glue into the glue mixer through a nozzle, forming glue mixing powder after high-speed mixing, paving,
the sawdust glue mixing process comprises metering sawdust of more than 10 meshes, feeding into a glue mixer, feeding glue into the glue mixer through a nozzle, mixing at high speed to form glue-mixed sawdust, spreading,
paving, namely uniformly paving bottom layer wood flour on a conveying belt according to a certain amount, uniformly paving glue-mixed wood flour on the bottom layer wood flour, placing the glued wood skin on the glue-mixed wood flour, continuously paving an upper layer wood flour layer and a wood flour layer, prepressing,
the prepressing process comprises the steps of adopting a shaving board production line for rolling process for molding, adopting a cold press for single-sheet or multi-sheet prepressing molding, preferably rolling molding, then hot pressing,
hot pressing process, which comprises hot pressing with single-layer or multi-layer press or flat pressing line under 7-12Mpa for 1.0-2.0min/mm (calculated according to the thickness of the surface layer),
the middle core layer is wood veneer, or poplar veneer, eucalyptus veneer, pine veneer, willow veneer, birch veneer, ash bark, ice candy veneer, and scientific wood veneer, the wood veneer is long medium plate veneer, or spliced veneer,
polishing the surface of the composite board after the polishing process step and the hot pressing process step to obtain the five-layer composite artificial board,
the glue is one or more of water-based polyvinyl acetate emulsion, water-based acrylic emulsion, soybean protein glue, water-based polyurethane emulsion, urea-formaldehyde resin, phenolic resin, melamine resin, furfural resin, EVA resin, MDI and PDI, and the glue is preferably the soybean protein glue and the polyvinyl acetate emulsion.
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