82 results about "Medium density fiberboard" patented technology

The invention relates to the technical field of density fiberboard conveyors, in particular to an intelligent suspension conveying device for medium density fiberboard production, which comprises a suspension conveyor and two groups of lifting and clamping assemblies, the lifting and clamping assemblies are used for clamping and lifting boards, the suspension conveyor is used for suspending and conveying the boards, and the lifting and clamping assemblies are used for clamping and lifting the boards. The clamping and lifting assemblies are matched with the suspension conveyor, one side of the plate can be lifted to the suspension conveyor, the plate is conveyed in a vertical state in the suspension process, then the horizontal space of the plate can be converted into the vertical space, the plate can be conveyed in the vertical state, the plate can be conveyed in the vertical state, and therefore the plate can be conveyed in the vertical state, and the plate can be conveyed in the vertical state. And meanwhile, one suspension conveyor is matched with the two clamping and lifting assemblies, the clamping and lifting time needed by the clamping and lifting assemblies can be saved, after one plate is hooked, the next plate can be rapidly transferred and hooked, and the suspension space is fully utilized.

The present disclosure relates to an aqueous dispersion binding agent for use in the manufacture of medium density fiberboard (MDF) and high-density fiberboard (HDF). The aqueous binding agent comprises a polyol component, soy flour, a sulfite agent, a surfactant, and an anti-foam agent. The present disclosure also provides a method for making MDF and HDF using an aqueous binding agent.

The utility model discloses a noise reduction composite floor. The composite floor body comprises a surface layer, a first waterproof layer, a first noise reduction layer, a first strengthening layer, a second noise reduction layer, a second strengthening layer, a second waterproof layer and a bottom layer. The surface layer is made of stone plastic materials, the first waterproof layer and the second waterproof layer are polyurethane waterproof coating layers, the first strengthening layer and the second strengthening layer are made of medium-density fiberboards, and the bottom layer is made of thermoplastic polyester elastomer materials. The first noise reduction layer is composed of a first cork frame and a first noise reduction piece, and the first cork frame is provided with a first rectangular groove. The second noise reduction layer is composed of a second cork frame and a second noise reduction piece, and the second cork frame is provided with a second rectangular groove. According to the floor, through unique structural design and material combination, excellent noise reduction performance is achieved, and noise of different frequencies is effectively blocked; good waterproofness is achieved, and the floor can be prevented from being affected with damp; high strength and stability are achieved, and the device can adapt to various use scenes; the comprehensive performance is excellent, and the quality and the use comfort of indoor floor decoration are improved.

The invention provides medium-density fiberboard drying waste gas treatment equipment, and relates to the technical field of waste gas treatment, the medium-density fiberboard drying waste gas treatment equipment comprises a fixed seat, a bracket is fixedly mounted on the side of the fixed seat, a barrel body is fixedly mounted in the fixed seat, gas inlet pipes are fixedly mounted at the two ends of the barrel body, and a driving motor is fixedly mounted at one end of the barrel body. According to the invention, the movable cylinder is pushed to move by the air pressure of waste gas, the movement of the movable cylinder realizes the filtration of a filter point according to the thrust of the air pressure, the movable cylinder enters the fixed cylinder under the pushing of the air pressure, and the air outlet hole preferentially contacts with the 1 / 2 part of the filter plate for filtration; the gas filtered by the filter plate is secondarily adsorbed and filtered by water mist sprayed by the atomizing spray head, the gas pressure of the waste gas is reduced in the later period, the movable cylinder is shrunk by a half distance, and the gas outlet hole moves to the other half position for filtering.

The utility model discloses a medium density fiberboard processing wood chip screening machine which comprises a base, the base is connected with a screening assembly used for screening raw materials for medium density fiberboard processing wood chips, and the screening assembly comprises a screening piece which is installed on the base and used for screening out impurities in raw material mixtures, the screening part comprises a rotating cylinder rotationally connected to the right end of the upper side of the base, a filtering cylinder used for filtering impurities is installed on the left side of the rotating cylinder, and a recycling box used for receiving the impurities is placed on the portion, corresponding to the lower side of the filtering cylinder, of the upper side of the base. According to the wood chip screening machine for medium-density fiberboard processing, the air cylinder assembly is matched with the push plate, materials retained in the rotating cylinder and the filter cylinder are guided out, the material recovery rate is increased, and the water pump, the three-way valve, the corrugated pipe, the water spraying ring, the branch pipe and the water spraying strip are matched with one another, so that the inner wall and the outer surface of the filter cylinder are cleaned.

The utility model discloses a primary-secondary door leaf with an anti-deformation structure, which comprises a first door leaf used as a secondary door and a second door leaf used as a primary door, and laminated veneer lumber is arranged at the adjacent ends of the first door leaf and the second door leaf. The laminated veneer lumber and the hollow shaving board arranged on the side of the laminated veneer lumber are used as core materials of the first door leaf and the second door leaf; the front side and the rear side of the laminated veneer lumber and the hollow-core shaving board are respectively provided with a medium-density fiberboard, the outer surfaces of the medium-density fiberboards are coated with facing material layers, and edge sealing materials are arranged at the ends of the laminated veneer lumber and the hollow-core shaving board. The high-strength laminated veneer lumber is adopted as one part of the core plate, the overall strength of the door leaf is guaranteed, the other part of the core plate is made of the hollow-core shaving board, and gaps used for absorbing deformation are formed in the hollow-core shaving board. In addition, the medium-density fiberboards arranged on the surfaces of the laminated veneer lumber and the hollow-core shaving board are made of soft materials, small gaps exist in the medium-density fiberboards, and the anti-deformation effect can also be achieved.

A billiards table is disclosed comprising a synthetic slate that includes a top layer formed from a reinforcing fiber and a curing resin, and a support layer adhered to a bottom side of the top layer. A first frame structure is attached to a bottom side of the support layer. The support layer may include polyurethane foam or medium-density fiberboard. A heating element is attached to a bottom side of the support layer, and an insulating layer covers a bottom side of the heating element. A second frame structure supports the first frame structure and defines a cavity that contains a weight. The reinforcing fiber may be carbon fiber, and the curing resin may be epoxy-based, with a ratio of approximately 1:1 by weight. A plurality of legs may support both the first and second frame structures.

The invention discloses an anti-deformation door plate with a sound insulation function and a honeycomb structure and without a straightener, which comprises an aluminum honeycomb core plate, a first inner-layer medium-density fiberboard and a second inner-layer medium-density fiberboard, and the first inner-layer medium-density fiberboard and the second inner-layer medium-density fiberboard and the second inner-layer medium-density fiberboard are adhered to two sides of the aluminum honeycomb core plate in the thickness direction. The upper frame, the left frame, the lower frame and the right frame wrap the aluminum honeycomb core plate to form a plate-shaped structure, and a first outer-layer medium-density fiberboard and a second outer-layer medium-density fiberboard are bonded to the two thickness sides of the plate-shaped structure respectively. The door plate is an integrated door plate, paint spraying, handle adding, hinge adding and other treatment can be conducted on the door plate subsequently, the application range is wide, the sound insulation effect is good, high deformation resistance is achieved, and the door plate as high as 3000 mm can be manufactured while a straightener is not used.

The utility model relates to the technical field of solid waste utilization furnaces, and discloses a medium density fiberboard calcination solid waste utilization furnace which comprises a base, an installation seat is fixedly assembled on the top of the base, a heat preservation pipe is installed in an inner cavity of the installation seat, a water tank is fixedly assembled on the outer wall of the installation seat, and a water pump is fixedly assembled on the outer wall of the water tank. According to the medium density fiberboard calcination solid waste utilization furnace, a recycling box is arranged on the outer wall of a mounting base, smoke generated by incineration is guided into the recycling box through a smoke guide pipe, high-temperature and high-heat smoke makes contact with the outer wall of a heat conduction pipe, heat is transmitted to water in an inner cavity of the heat conduction pipe, the temperature of the water is increased, and then circulation is conducted through a heat preservation pipe; and a certain heat preservation effect is achieved on the outer wall of the mounting base through the heat pipe, heat in high-temperature and high-heat flue gas can be recycled, a certain heat preservation effect can also be achieved on the inner wall of the mounting base, and therefore the incineration bin can conduct incineration operation better.

A cordless aw is provided with regenerative braking means that increases the number of repeated cuttings the saw is able to perform (x) per full discharge cycle of the battery pack, as compared to the number of repeated cuttings achievable by the same saw not employing a regenerative braking means (y) per full discharge cycle of the battery pack, such that x / y is approximately at least one of the following: i) 1.1 when cutting a Pressure-Treated (PT) lumber workpiece having a cross-sectional size of approximately 89 mm×89 mm±2 mm, ii) 1.15 when cutting a Spruce Pine Fir (SPF) lumber workpiece having a cross-sectional size of approximately 38 mm×89 mm±2 mm, or iii) 1.25 when cutting Medium Density Fiberboard (MDF) workpiece having a thickness of approximately 19 mm±1 mm and a width of approximately 76 mm±2 mm.

The present invention relates to a door panel comprising a stile (1) filled with rock wool and covered on both sides with mineral sodium silicate barrier or gypsum board, a door panel comprising MDF board (2) covered on both sides of the mineral sodium silicate barrier or gypsum board barrier, and a door comprising said door panel. The inventive door panel and door provide both fire resistance and acoustic insulation.

In the field of decorative floor coverings, decorative panels are known that have a core layer based on MDF (medium-density fiberboard) or HDF (high-density fiberboard) onto which a decorative substrate is bonded to give the panels the desired appearance. The invention relates to a panel, in particular a decorative panel, a floor panel, a ceiling panel, or a wall panel. The invention also relates to a floor covering consisting of a plurality of panels joined together.

The invention relates to a method and an apparatus for process-optimized manufacture of wooden boards, in particular fiberboards or MDF boards. In order to provide such a method and such an apparatus, which allow quality optimization and at the same time also continuous quality assurance, make it possible to determine the best possible control variables particularly easily and quickly, and additionally ensure continuous production with the lowest possible reject rate and the greatest possible process stability, according to the invention at least one process parameter, in particular the water content and / or the amount of adhesive applied to the fibrous material, is measured by near-infrared spectroscopy and the measured values of the at least one process parameter are transmitted to a control unit for process optimization and / or for process-optimized control of the method. The at least one process parameter is measured at one or more positions selected from a position during the provision of wood chips directly downstream of the lumberyard, in particular between the lumberyard and a subsequent wood-chip scrubber, and / or a position downstream of the provision of wood chips and during the boiling of the fibrous material, in particular between a wood-chip scrubber and a pre-boiler or a boiler, and / or a position directly downstream of the drying of the glued fibrous material, in particular between the dryer and a screen and / or the fiber bin, and / or a position on or in the fiber bin, in particular on a window of the fiber bin, and / or a position downstream of the spreading, in particular downstream of the spreading station and / or downstream of a molding machine, and / or upstream of a press for pressing the molded strand and / or in the region of the molding belt.

A panel, in particular wall, ceiling, furniture or floor panel, wherein the panel comprises: a support panel, such as a medium density fiber (MDF) panel, a high density fiber panel (HDF) or a particle panel; wherein the panel has at least one chamfer at least one edge; and a decorative printing layer applied to the panel and to the at least one chamfer.

The invention discloses medium-density fiberboard hot-press forming equipment adopting a correction overlying mechanism, and particularly relates to the field of plate hot-press forming. The medium-density fiberboard hot-press forming equipment comprises a hot press, two sets of lifting sliding rails are symmetrically installed on the side wall of the hot press, and threaded rods are rotationally arranged in the lifting sliding rails; auxiliary mounting plates in sliding fit with the lifting sliding rails are in threaded connection with the outer walls of the threaded rods, a surface layer optimizing part for shaping the surface of the plate blank is arranged between the two sets of auxiliary mounting plates, and a permeation promoting part for promoting permeation of glue in the plate blank is arranged on one side of the shaping part. The pattern wheel periodically vibrates to promote uniform permeation of glue, the leveling roller and the lower alignment roller cooperatively flatten the surface and the edge of the plate blank, and the cleaning air pipe performs high-pressure dust removal, so that a correction overlying mechanism is formed, and the defects of glue agglomeration, surface concavo-convex, edge curling, impurity pollution and the like are effectively eliminated; the plate blank enters the hot-pressing process in a flat and dust-free state, and the quality stability of a finished product is comprehensively improved.

A floor board including a decorative surface layer applied to a substrate, where the substrate is optionally MDF or HDF material at a side edge thereof, and at least one side edge together with a side edge opposite thereto forming a first pair of opposite side edges of said substrate. The first pair of opposite side edges includes mechanical first and second coupling parts, respectively, allowing the floor board to be coupled at the respective side edges with a similar floor board. Also, a floor board covering consisting of a plurality of the floor boards and a method for manufacturing such floor boards.

This utility model discloses an aluminum-wood composite structure door, including an internal core panel. The core panel includes a first keel and a second keel. A first filler is provided on the inner side of the first and second keels, and a second filler is provided on the outer side of the first and second keels. A veneer laminate is provided on the outer side of the second filler. A multi-layer board is provided on the front and rear sides of the core panel, and a medium-density fiberboard is provided on the outer side of the multi-layer board. The side of the veneer laminate is sealed by a side edge sealing profile. This utility model improves the overall structural strength by setting an aluminum alloy keel inside the door panel, and setting the first filler, second filler, and veneer laminate on the inner and outer sides of the keel to form the core panel. At the same time, multi-layer boards and medium-density fiberboard are connected on the front and rear sides of the core panel through a composite process, and the side of the veneer laminate is sealed by a side edge sealing profile.

Birch bark product obtained after a layering process comprising the steps: (a) providing a birch cane bark, preferably as flat-pressed birch cane bark; b) optional pre-sorting and / or pre-formatting of said birch bark; c) brushing off the predominantly white side of the birch bark; d) formatting the birch bark obtained after step c) to a uniform width and / or length, preferably in the range of 30 to 70 cm, more preferably in the range of 40 to 60 cm width, even more preferably to a width of 50 cm, in order to obtain one or more bark panels; e) optionally sorting the bark panels after step d) to obtain a randomised or a specifically selected slice pattern according to bark quality, bark thickness, colour and / or pattern; f) aligning and cutting the bark panels according to step d) or e) to obtain uniform layers of bark panels, preferably with a length of 140 to 160 cm and a width of 40 to 60 cm, more preferably with a length of 150 cm and a width of 50 cm; g) coating each layer of bark board according to step f) with an epoxy resin, preferably an epoxy resin with an open time of about 1 to 3 hours, preferably about 2 hours, preferably such a one-sided coating of each layer of bark board according to step f); h) followed by curing the bark panels according to step g) so that the Shore hardness of the epoxy resin is approximately equal to the Shore hardness of the bark panels, preferably both Shore hardnesses are in the range of 55 to 65 A, more preferably about 60 A, even more preferably 60 A; i) transferring the coated bark panels after steps g) and h) into a device for gluing and pressing layer by layer, preferably about 10 to 15 layers per gluing and pressing step, and wherein the device comprises a wood-based material board, preferably comprising a knot-free solid wood or a medium-density fiberboard (MDF); j) followed by pressing the bark panel layers according to step i) with a pressing pressure in the range of 270 to 290 bar, preferably 275 to 285 bar, more preferably about 280 bar, even more preferably 280 bar, calculated on an area of ​​150 cm length and 50 cm width; k) curing the pressed bark panels after step j) for at least 18 hours, preferably at least 24 hours, more preferably at least 48 hours, followed by opening the bonding and pressing device for a further build-up of layers of the pressed bark panels; I) Repeating steps a) to k) until a minimum number of 100 glued and pressed bark panels is obtained, preferably at least 120 glued and pressed bark panels, more preferably at least 140 glued and pressed bark panels, in order to obtain a bark block.

Panel for wall or ceiling cladding or floor covering, comprising a carrier layer (10) of HDF or MDF, onto which a decorative layer of plastic is applied, wherein the decorative layer (16) consists of a PVC-free and polyolefinic material, in particular PP or PET, with a wear layer (18) covering the decorative layer (16), which consists of PET or a polyolefinic transparent polymer, and with a damping layer (14) between the decorative layer (16) and the carrier layer (10), wherein the damping layer (14) consists of a wood-plastic compound material, and with a counter-tension layer (12) consisting of cork or polymer foam.

The invention relates to the technical field of high polymer materials, and particularly discloses anti-yellowing polyester resin for an MDF plate and a preparation method of the anti-yellowing polyester resin. An antioxidant unit and a formaldehyde reactive unit are simultaneously bonded on a molecular chain of the polyester resin through covalent bonds, and the two functional units are connected to a polyester main chain through flexible chain segments. The preparation method comprises the following steps: firstly, synthesizing a difunctional linking agent of which one end contains an antioxidant group, the other end contains a formaldehyde reactive group and the middle is connected by a flexible chain segment; and carrying out melt polycondensation reaction on the coupling agent serving as an end-capping reagent or a comonomer, polyhydric alcohol and polybasic acid to obtain the target resin. The problems of migration, loss and failure caused by traditional physical addition of small-molecule auxiliaries are fundamentally solved, so that when the obtained polyester resin is used for an MDF plate facing coating, lasting and efficient hot-pressing yellowing resistance and weather yellowing resistance can be provided, the free formaldehyde release amount of a plate can be continuously captured and reduced, and the service life of the plate is prolonged. The decorative property and the environment-friendly property are both improved.

The invention belongs to the technical field of organic compounds and artificial boards, and relates to a whitening agent, a preparation method thereof and application of the whitening agent in whitening type medium density fiberboards, the whitening agent comprises the following components by mass percent: 2-5% of hydrogen peroxide, 0.2-0.6% of sodium silicate, 0.5-1.5% of sodium hydroxide, 0.1-0.4% of water-soluble stilbene fluorescent whitening agent and the balance of water. The preparation method comprises the following steps: sequentially adding the components into water at 60-65 DEG C, stirring and dissolving, and keeping the temperature at 60 DEG C for later use. When being applied, the cleaning agent is added in a wood chip washing process, the mass of the cleaning agent is 1-1.5% of the total mass of cleaning water for the first time, and 0.05-0.08% of the cleaning agent is supplemented per hour subsequently. According to the whitening agent, through the synergistic effect of chemical oxidation and physical color complementing, the whiteness of a fiberboard reaches 31-36 (only 14 in a conventional process), the physical and chemical properties meet the GB / T 11718-2021 standard, and the whitening agent is environmentally friendly, free of residues, simple to prepare and apply, suitable for industrial continuous production and capable of remarkably improving the added value of products.

The utility model discloses a sound insulation door, including door frame and door board, the door board with door frame rotatable connection, the door board is composite layer structure, from outside to inside is in proper order: panel, sound insulation heat preservation gasket, medium density fiberboard and fiber sound absorption board, the panel, sound insulation heat preservation gasket and medium density fiberboard symmetry setting in the both sides of fiber sound absorption board, the door board still includes multilayer damping glue for connecting each material layer. The utility model has beneficial effect in that, through setting up the door board as composite layer structure, has good sound insulation performance, light in weight, and conveniently opens and shuts.

The utility model relates to the technical field of artificial boards, and discloses a combined medium-density fiberboard which comprises a medium-density fiberboard body, a connecting strip is arranged on one side of the medium-density fiberboard body in a protruding mode, a connecting groove matched with the connecting strip in an inserted mode is formed in the other side of the medium-density fiberboard body, and at least one first clamping strip is arranged on the upper surface of the connecting strip. At least one second clamping strip is arranged on the lower surface of the connecting strip, a first clamping groove connected with the first clamping strip in a matched mode is correspondingly formed in the upper surface of the connecting groove, a second clamping groove connected with the second clamping strip in a matched mode is correspondingly formed in the lower surface of the connecting groove, an inserting groove is formed in the middle of the connecting strip, and an inserting strip matched with the inserting groove is arranged in the middle of the connecting groove. According to the utility model, two plates can be quickly spliced and combined, the mounting is more convenient, the mounting efficiency is improved, the plates are not easy to fall off, the stability and tightness are ensured, and the mounting quality is ensured.

The present application relates to a device (1) for processing a narrow side (2) of a wood-based panel (3), in particular a particleboard or MDF panel, comprising an application device (4) with at least one application element (5) for applying a wax (6) to a narrow side surface (7) of the narrow side (2), a processing element (8) for processing the wax (6) previously applied to the narrow side surface (7) and a guiding device (9) for guiding the application element (5) and / or the processing element (8) on the narrow side surface (7) in a direction parallel to a longitudinal axis (10) of the narrow side (2).The processing element (8) has a contact surface (11) on its underside, which is designed and configured to come into direct contact with the narrow side surface (7) during a processing operation in which the wax (6) previously applied to the narrow side surface (7) is processed, thereby distributing the wax (6) on the narrow side surface (7) and preferably incorporating it at least into an upper wood-based material layer (12) of the wood-based panel (3) adjacent to the narrow side surface (7), wherein the processing element (8) can be guided on the narrow side surface (7) by means of the guide device (9) during the processing operation in such a way that the contact surface (11) of the processing element (8) can come into contact with the narrow side surface (7) over the entire length of the narrow side (2).

The invention discloses an anti-static flame-retardant floor based on graphene and a production process thereof, and relates to the technical field of building materials. The anti-static flame-retardant floor based on graphene is prepared by taking a medium-density fiberboard as a base material and coating slurry, the slurry is prepared from the following raw materials in parts by weight: 1 to 1.5 parts of graphene powder, 6 to 12 parts of modified nano silicon dioxide, 18 to 28 parts of modified epoxy resin, 3 to 5 parts of carbon black, 2 to 3 parts of dodecyl trimethyl ammonium chloride, 9 to 16 parts of aluminum hydroxide, 6 to 13 parts of magnesium hydroxide, 7 to 11 parts of ammonium polyphosphate, 4 to 6 parts of pentaerythritol, 5 to 8 parts of melamine, 5 to 7 parts of ethylenediamine and 1 to 1.5 parts of a silane coupling agent KH-550. 0.4-0.7 part of an organic silicon defoaming agent, 3-5 parts of sodium lignin sulfonate and 10-20 parts of deionized water. Graphene is adopted to enhance the anti-static and flame-retardant properties, and a dispersion and curing process is innovated to improve the stability; the material has the characteristics of wear resistance and temperature change resistance and is wide in application scene; the production process is optimized, and the consistency and quality of products are guaranteed; the material is environment-friendly, and has both practicability and economical efficiency.

In the field of decorative floor coverings, decorative panels are known to have a core layer based on MDF (Medium Density Fiberboard) or HDF (High Density Fiberboard) onto which a decorative substrate is bonded to give the panels the desired appearance. The invention relates to a panel, in particular a decorative panel, a floor panel, a ceiling panel, or a wall panel. The invention also relates to a floor covering consisting of a plurality of interlocking panels.

A waterborne external release agent for producing ligno-cellulose composites such as oriented strand board (OSB), particle board (PB) and medium density fiberboard (MDF), which employ isocyanate-based adhesives such as pMDI is provided. The release agent as a formulation includes effective amounts of at least one tertiary ethoxylated fatty amine, effective amounts at least one of an acidic alkyl phosphate ester and an acidic phosphate ester ethoxylate, or combinations thereof, with the balance water. The formulation can also include a defoamer and a nonionic surfactant. The formulation can be applied to mats and / or metal platens when making the ligno-cellulosic composites, wherein the effective amounts of the at least one tertiary ethoxylated fatty amine and the at least one of an acidic alkyl phosphate ester and an acidic phosphate ester ethoxylate, or combinations thereof provide improved release properties, corrosion inhibition for metal surfaces, and minimum film build up when making ligno-cellulosic composites.

The invention discloses a straw composite silent wooden door and a preparation method thereof, and belongs to the technical field of wooden door manufacturing. The wood door sequentially comprises a straw core layer, a wood frame layer, a micro-foaming adhesive layer and a covering layer from inside to outside. Wherein the straw core layer is formed by compounding and curing straw or wheat straw and an improved magnesium oxychloride inorganic adhesive, and the curing degree is 65-70%; the wooden frame layer is formed by splicing quadrilateral or equihexagonal unit blocks processed by small-diameter Chinese fir or poplar; and the covering layer is a medium-density fiberboard and a facing material or a facing plywood. The improved magnesium oxychloride adhesive is prepared from light calcined magnesia, anhydrous magnesium chloride, deionized water, phosphoric acid, nano silicon dioxide and highland barley straw ash according to a specific ratio. The preparation method comprises the three steps of straw core layer preparation, composite door core plate preparation and finished product composite door preparation. The formaldehyde-free improved magnesium oxychloride adhesive is adopted, the formaldehyde release amount is smaller than or equal to 0.1 mg / L, and the straw utilization rate reaches 90% or above; through the synergistic effect of the porous structure of the straw core layer and the micro-foaming adhesive layer, the sound insulation amount is larger than or equal to 35 dB and is increased by 40% or above compared with a traditional wooden door; due to the wood frame and straw core layer composite structure, the static bending intensity of the core plate is larger than or equal to 18 MPa, and the internal bonding strength is larger than or equal to 0.8 MPa; the production cost is reduced by 30%-40% compared with that of a solid wood door, and the composite material can be widely applied to the fields of indoor silence doors and environment-friendly home building materials.

This project aims to provide a novel and useful method for extracting essential oils, while also promoting the effective utilization of peeled cores. [Solution] The method for extracting essential oils comprises a grinding step of grinding wood raw material to obtain a pulverized product, a distillation step of distilling the pulverized product to obtain a distillate, a separation step of separating the distillate into essential oil and aromatic distilled water, and a water removal step of removing trace amounts of water contained in the essential oil obtained in the separation step. In the water removal step, it is preferable to remove frozen water by cooling the essential oil obtained in the separation step to a temperature below the freezing point of water and higher than the freezing point of the essential oil components. It is preferable to use the peeled core 4 remaining after obtaining veneers 3 continuously with a rotary lathe as the wood raw material. The high-purity essential oil obtained by the present invention can be used for the same purposes as in the conventional method, and the pulverized product after essential oil extraction can be reused alone or mixed with other materials in the manufacture of wood fiberboard such as MDF or wood board such as particleboard.

The utility model discloses a medium density fiberboard convenient to install, which comprises a plurality of board single bodies connected end to end, a first board body is connected to the board single body positioned at one end, and a second board body is connected to the board single body positioned at the other end; limiting assemblies are installed between the adjacent plate single bodies, between the plate single bodies and the first plate body and between the plate single bodies and the second plate body. Buckling assemblies are arranged on one side of the single plate body and one side of the first plate body, and second mounting tables matched with the buckling assemblies in a clamped mode are arranged on the other side of the single plate body and one side of the second plate body; the limiting assembly comprises a buckle plate located at the top of the buckling assembly and a bottom plate clamped with the buckle plate, and the bottom plate is located at the bottom of the buckling assembly. According to the medium-density fiberboard convenient to install, the problems that in the splicing installation process of an existing medium-density fiberboard, the splicing structure is complex, or the fiberboard needs to be cut into a complex shape, so that the machining process is tedious and difficult, the machining efficiency is low, and the splicing process is complex and inconvenient are solved.