42 results about "Particle board" patented technology

The invention discloses a shaving board flatness and surface defect on-line detection device, and belongs to the technical field of shaving board optical detection.The shaving board flatness and surface defect on-line detection device comprises conveying roller equipment used for conveying shaving board bodies, a driving mechanism is erected on the conveying roller equipment, and a light adjusting mechanism is arranged in an outer shell of the driving mechanism; the light adjusting mechanism comprises a mounting frame, U-shaped frames and side frames, each U-shaped frame is provided with a first rotating shaft and a second rotating shaft, the two first rotating shafts are jointly wound with a first light-transmitting belt for adjusting illumination light, and the two second rotating shafts are jointly wound with a second light-transmitting belt for adjusting light colors. The light intensity can be automatically adjusted, shaving boards of different types and different roughness degrees can be adapted, the light intensity is adjusted to resist diffuse reflection or avoid overexposure, meanwhile, light colors are changed according to the defect types of the shaving boards and the color of the board surface, defect characteristics are enhanced, interference of wood dust is isolated, and the recognition precision is improved.

The utility model discloses a shaving board dedusting and drying device, which relates to the technical field of shaving board processing and comprises a supporting cylinder, two supporting plates are fixed at the bottom of the supporting cylinder, a dust collecting component is mounted at the bottoms of the two supporting plates, a driving motor and a drying component are mounted on the dust collecting component, and a support column is rotatably connected to the bottom of the inner side of the supporting cylinder through a bearing. The supporting column is driven by a driving motor, a supporting plate is fixed to the top end of the supporting column, and a plurality of bearing assemblies distributed in a circular array are installed at the top of the supporting plate. The shaving boards are lifted by the bearing assemblies, the supporting columns are driven by the driving motor to pull the supporting plate to rotate, the supporting plate drives the bearing assemblies and the shaving boards lifted on the bearing assemblies to rotate at the same time, the shaving boards can be helped to throw away dust attached to the surfaces of the shaving boards by means of centrifugal force, and self-purification is completed; the drying assembly is matched with the supporting cylinder to wrap the bearing assembly and the shaving board on the bearing assembly, and the shaving board is dried through hot air while the shaving board rotates.

The utility model relates to the technical field of particle board processing, in particular to a particle board processing device which comprises a belt type board cooling device, a plurality of groups of board cooling frames are distributed on a conveying belt on the belt type board cooling device in the length direction, and each group of board cooling frames is composed of a plurality of groups of board cooling rods in the width direction of the conveying belt. The grating platform is fixed at the front end of a rack of the belt type plate cooler; the intermittent pushing mechanism is also arranged at the front end of the rack of the belt type plate cooling device, and the intermittent pushing mechanism is composed of an intermittent upper swing assembly installed on the rack and a pushing wheel set installed at the front side end of the intermittent upper swing assembly; the pushing wheel set comprises a transverse shaft rotationally installed at the front end of the intermittent upper swing assembly and multiple sets of plate conveying wheels fixedly arranged on the transverse shaft in a sleeving mode, the intermittent upper swing assembly is used for intermittently driving the transverse shaft to swing upwards to be close to the bottom wall of the grating platform, and the upper middle portions of the plate conveying wheels extend out of gaps of the grating platform to make contact with the bottom wall of a particle plate. Particle plates are pushed in place after the plate feeding wheels rotate, and arrangement of a large number of rollers is replaced.

The utility model relates to the technical field of flatness detection, and discloses a shaving board flatness detection device which comprises a supporting table and further comprises a movable plate located above the supporting table. The plate body can be effectively fixed through the arranged fixing assembly, so that the conditions of displacement and the like of the plate body are avoided, the position of the plate body can be effectively adjusted and moved through the arranged adjusting assembly, and the plate body can be collected through the arranged collecting assembly. The device can effectively collect and process particle impurities adhered to the outside of the plate body, can effectively clean dust, particles and other impurities adhered to the outside of the plate body through the arranged scraping and cleaning assembly, thereby preventing the dust, particles and other impurities from affecting the flatness detection result of the plate body, and can effectively improve the flatness detection accuracy through the arranged mounting assembly. A worker can conveniently disassemble and replace the sticking roller, and the overall practicability of the device is further improved.

The utility model belongs to the field of shaving board processing technology especially is a kind of shaving board cutting equipment, including processing table, the bottom of processing table is equipped with support seat, the upper end of processing table is equipped with two guide plates, two the guide plate between the common sliding connection has slide, the slide is equipped with cutting assembly in, one end of one guide plate is equipped with hydraulic cylinder, the telescopic end of hydraulic cylinder is connected with slide, the upper end of processing table is equipped with two sliding slot, and the positioning assembly is equipped on the processing table;Cutting assembly includes the limiting plate of being installed in slide, two sliding blocks are connected in the limiting plate on slidingly.The utility model is positioned to the middle part of the two sides of shaving board by the setting of positioning assembly, to ensure cutting stability;And by the setting of cutting assembly, the two sides of shaving board can be cut simultaneously, and the interval of two sides cutting is conveniently adjusted, cutting efficiency is improved, and flexibility is improved.

The invention relates to a method for manufacturing reusable concrete formwork panels and to a reusable concrete formwork panel in concrete casting. In order to provide a method for manufacturing concrete formwork panels which can be used multiple times and which is inexpensive to manufacture, and a concrete formwork panel, wherein the concrete formwork panel is also suitable for fair-faced concrete casting, a particle board or oriented strand board having two cover sides and side faces is first provided, a water-based two-component coating composition is then applied to at least one cover side in liquid form, wherein one component of the coating composition has a thermosetting carrier resin and the second component comprises at least one release agent component. Finally, the coated coating composition is cured in a hot press, thereby forming a closed coating on the particle board or oriented strand board.

1. Name of the product in this design: Toy (Power Particle Board). 2. Purpose of this design: This design is intended as a toy for children to play with. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The present application relates to the technical field of machine vision, and discloses a kind of based on machine vision's shaving board surface defect intelligent detection method and system, a kind of based on machine vision's shaving board surface defect intelligent detection method, comprising the following steps: step S101, determine the main direction of wood grain;Step S102, calculate and obtain harmonic ridge curvature index;Step S103, generate curvature field;Step S104, generate each pixel defect probability graph;Step S105, generate binary defect mask;Step S106, connected domain analysis outputs defect detection result.The present application locks the main direction of wood grain by frequency domain analysis, removes periodic texture interference using harmonic ridge curvature index, constructs anisotropic curvature field and applies rotated directional convolution kernel, and adaptively extracts features along the direction of wood grain, thereby distinguishing wood grain texture from real defects, reducing false positive rate and false negative rate.

The invention discloses a shaving board reinforced by a fiber reinforced polymer layer and a preparation method and application thereof, and belongs to the technical field of wood composite materials. The shaving board comprises a shaving board base material and an FRP layer bonded to at least one surface of the shaving board base material. Wherein the FRP layer is composed of carbon fiber cloth and epoxy resin; the thickness of the shaving board base material is 18 mm, the density is 0.64-0.72 g / cm < 3 >, and the surface density of the carbon fiber cloth is 300 g / m < 2 >. The bending strength of the prepared FRP-PB reaches 53.98 MPa under the standard condition, and the strength retention rate reaches 84.8% after high-humidity or heat-moisture treatment; under normal humidity, the creep quantity is lower than that of a common protection plate and is equivalent to that of an oriented strand board; after high-humidity treatment, the FRP-PB shows more excellent creep resistance than a common shaving board and an oriented shaving board; the invention is especially suitable for bathroom cabinets, kitchen cabinets and other furniture and building built-in components.

The invention relates to a copper plate particle detection method and system based on edge detection and dynamic region division, and belongs to the technical field of computer vision and metal material quality detection. Comprising the following steps: firstly, obtaining an original surface image of a copper plate containing a #-shaped steel belt, preprocessing the original surface image to obtain a de-noised grayscale image, and outputting an illumination normalized grayscale image through contrast-limited adaptive histogram equalization to eliminate illumination interference. Then, salient edges are extracted through edge detection to obtain a binary edge image, Hough transform is input to obtain a #-shaped steel belt linear equation, coordinates of intersection points are calculated, and a Sudoku area is divided; and extracting features of each sudoku region to obtain feature vectors, inputting the feature vectors into a multi-layer perceptron model for training, then using the feature vectors for particle detection of a new image, and outputting a result in combination with a dichotomy criterion. And finally, a result is transmitted to a programmable logic controller through an industrial Ethernet or serial port communication, and an execution mechanism is driven to paste distinguishing labels for the particle board and the good board respectively.

This utility model discloses a heating and feeding device for a particleboard hot press, including a conveyor. A storage bin is provided on one side of the conveyor, and hydraulic push rods are fixedly installed on both sides of the bottom upper surface of the storage bin. In this utility model, the particleboard is placed on a feeding plate on an inclined plate. The second motor on the mounting plate is activated, driving a reciprocating screw to rotate. Through the use of a connecting block and a connecting groove, a first moving block is limited, allowing it to move on the reciprocating screw. Simultaneously, the movement of the first moving block moves the feeding plate at one end of the connecting block, thus conveying the particleboard into the storage bin. Activating the hydraulic push rod moves the top plate, ejecting the particleboard. Then, activating the electric cylinder moves the push plate, pushing the particleboard onto the conveyor. The conveyor then transports the particleboard into the hot press body, automatically feeding the particleboard.

The invention relates to a method and an apparatus for the process-optimized production of manufactured wood boards, in particular particle boards. In order to provide a method and an apparatus for the process-optimized production of manufactured wood products which make it possible to optimize quality while providing continuous quality assurance, which allow the best possible control variables to be determined particularly easily and quickly, and which also guarantee continuous production that results in the lowest possible wastage while maintaining the highest possible level of process stability, the invention provides the following: at least one process parameter, in particular the water content and / or the pH value, is measured in the course of the method by means of near-infrared spectroscopy and the measured values of the at least one process parameter are then sent to a control unit for process optimization and / or process-optimized control of the method, wherein the measurement of the at least one process parameter is taken at one or more positions, selected from: a position immediately upstream of the gluing, in particular between a dry raw chip hopper and the gluing station; a position immediately downstream of the gluing, in particular between the gluing station and a chip material distributor and / or a dispersing station; a position in the provision phase immediately downstream of a timber yard, in particular between the timber yard and a subsequent dryer; and / or a position in the provision phase immediately downstream of a dryer, in particular between the dryer and a sieving station and / or a dry raw chip hopper.

The present application relates to the technical field of shaving board preparation, and proposes a kind of flame-retardant shaving board and preparation method thereof, the preparation method of flame-retardant shaving board includes the following steps: step 1: under the protection atmosphere, raw materials such as isophorone diisocyanate, polycaprolactone diol are mixed to prepare prepolymer;Step 2: after the reaction of prepolymer and trimethylolpropane, modified polyurethane emulsion is obtained by emulsification;Step 3: dry shaving and emulsion are mixed, and hot-pressing is formed, to obtain flame-retardant shaving board.Have the advantage: the modified monomer of chemical synthesis in the application is reacted with isocyanate through hydroxyl group, and is chemically bonded into polyurethane adhesive, avoids the migration problem of various additives in traditional physical addition mode, effectively improves the flame-retardant performance, antibacterial characteristics and water resistance of the prepared shaving board.

The utility model discloses an anti-mildew log board, which relates to the technical field of log boards and comprises a base layer and an insect-proof layer. The top surface of the base layer is uniformly coated with a first adhesive layer, the bottom surface of the base layer is uniformly coated with a second adhesive layer, the base layer is formed by pressing oak wood chips and maple wood chips, the first adhesive layer and the second adhesive layer are both phenolic resin adhesives, the top surface of the first adhesive layer is bonded with a first reinforcing layer, the bottom surface of the second adhesive layer is bonded with a second reinforcing layer, and the top surface of the second adhesive layer is bonded with a second reinforcing layer. The first reinforcing layer and the second reinforcing layer are moisture absorption particle boards, the top surface of the first reinforcing layer is coated with a first anti-permeation layer, according to the anti-mildew log board, the anti-mildew effect of the log board can be improved through the synergistic effect of the nano-silver coating and the chitosan microcapsule slow-release preservative, and the anti-mildew effect of the log board is improved; the humidity balance of the log board can be guaranteed through the arranged breathable micropores, moisture permeation is effectively isolated through cooperation of the breathable micropores and the anti-permeation layer, and then the service life of the log board is prolonged.

This utility model relates to construction and is intended for the use of fiber cement boards in roofing systems as a rigid sheet base beneath a waterproofing layer. The roofing structure utilizes autoclave-dried fiber cement board, which provides increased moisture resistance, strength, and fire safety for the roofing system compared to cement-bonded particle boards. The roofing structure comprises a roof base, a thermal insulation layer, and a waterproofing layer, additionally containing a vapor barrier located between the base and the thermal insulation layer. It also further comprises a rigid autoclave-dried fiber cement board approximately 10 mm thick, with a surface treated with a bitumen primer, positioned between the thermal insulation and waterproofing layers.

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 application belongs to the technical field of wood sawing, and particularly discloses a wood sawing device for high-deformation-resistance shaving board processing and a method thereof, which comprises a frame body and a moving structure, the lower part of the moving structure is connected with a cutting saw and an auxiliary saw, the cutting saw cooperates with the auxiliary saw to saw the high-deformation-resistance shaving board, the structure of the auxiliary saw is the same as that of the cutting saw, the auxiliary saw comprises a connecting shell fixed to the lower part of the moving structure, a saw blade is rotatably arranged in the connecting shell, a transmission motor for rotating the saw blade is fixed to the connecting shell, and the thickness of the saw blade in the auxiliary saw is smaller than that of the saw blade in the cutting saw. The auxiliary saw with different thickness and the cutting saw are arranged, and are matched with a pressing wheel, double dust collection and a displacement sensor for monitoring, so that the problems of panel separation and edge collapse burr caused by stress transmission during sawing of the veneer shaving board in the background art are effectively solved, the sawing path is optimized, the graded efficient dust removal is realized, and the sawing precision and the equipment operation stability are improved.

The invention discloses a steel belt hot press for shaving board preparation, and relates to the field of shaving board preparation, the steel belt hot press comprises an upper press and a workbench, the back faces of the upper press and the workbench are connected with a main frame, a hydraulic station is arranged in the middle of the inner side of the upper press, and hydraulic telescopic rods are arranged on the two sides of the hydraulic station; and an upper pressing plate is arranged at the bottom of the hydraulic telescopic rod, a placing plate is arranged at the position, close to the bottom of the upper pressing plate, of the top of the workbench, and a lower pressing plate is arranged at one end of the placing plate. And real-time identification and intelligent judgment on the surface cracks of the shaving board are realized. And the control module analyzes the fracture form and the edge gray scale based on a deep learning algorithm, and automatically outputs a control signal to drive the electric control telescopic rod to complete the linkage action. The system realizes closed-loop control of identification, judgment and elimination, and manual detection errors are avoided.

The invention relates to the technical field of plate processing, in particular to a shaving board drawer curved surface closed processing device based on an environment-friendly coating system.The shaving board drawer curved surface closed processing device comprises a workbench, a fixed clamp and a movable hanging bracket, and the movable hanging bracket moves in the length direction of a shaving board clamped by the fixed clamp; a lifting seat capable of vertically lifting is arranged at the top of the movable hanging bracket, a horizontal scraping plate and a side scraping plate are arranged on one side of the lifting seat, and the lifting seat lifts in the vertical direction in the moving process of the movable hanging bracket to keep the gap between the horizontal scraping plate and the top of the shaving board consistent; according to the technical scheme, putty is continuously and quantitatively extruded to the surface of the shaving board through the putty extrusion unit, the flowing range of the putty is effectively restrained through cooperation of the horizontal scraping plate and the side scraping plate, and the thickness of a filling layer is accurately controlled through dynamic lifting adjustment of the lifting base; the problem that the thickness of putty is not uniform due to a special-shaped curved surface is solved while the special-shaped notch of the shaving board is comprehensively sealed, and the situation that a concave area is insufficient in filling or accumulation at a convex position is too thick is effectively avoided.

A full-automatic chamfering device for furniture plates comprises a conveying table and two grinding roller sets, the first grinding roller set and the second grinding roller set make contact with the side edges of the plates in sequence for grinding in the plate conveying direction, the first grinding roller set comprises at least one first grinding roller set, and each first grinding roller set comprises two first grinding rollers distributed on the upper side and the lower side of the plates; the first polishing roller set comprises at least one set of first polishing rollers, the first polishing rollers are configured to make contact with the upper side edge and the lower side edge of the plate to conduct polishing, and the second polishing rollers are configured to make contact with the side edges of the plate to conduct polishing in the horizontal direction. A two-step grinding method that the first grinding roller set with the inclined 45-degree angle is matched with the second grinding roller set in the horizontal direction is adopted, traditional one-time vertical powerful cutting is decomposed into progressive grinding, the single-time grinding amount and cutting impact are effectively reduced, and the problems of layering, cracking and edge breakage which are likely to happen to a multi-layer plate, a particle plate and the like are fundamentally solved.

Provided are a continuous flat pressing surface layer flame-retardant particle board and a preparation method thereof, which can reduce the burning growth rate index of the flame-retardant particle board and the influence of the flame retardant on the surface bonding strength of the particle board. The method comprises: simultaneously atomizing and applying, to raw material particles, 10-15% of the mass of the particles of a melamine modified urea-formaldehyde resin adhesive and 0.5-0.8% of the mass of the particles of a sodium hydroxide aqueous solution with a concentration of 0.4-0.6 mol / L to obtain pretreated surface layer particles, and blending the surface layer particles with a surface layer flame retardant PAP-Mg-Zn at a mass ratio of 100:15-17 to obtain flame-retardant surface layer particles; and laying the flame-retardant surface layer particles and core layer particles in a manner that the surface layer particles are in the upper and lower layers and the core layer particles are in the middle layer, and then continuously flat pressing the board blank at a hot pressing speed of 220-250 mm / s to obtain the continuous flat pressing surface layer flame-retardant particle board. The structural formula of PAP-Mg-Zn is as follows.

The invention discloses a particle board surface defect identification method and system based on a twin network and supervised comparative learning, and the method comprises the steps: (1) collecting a particle board surface image, carrying out the preprocessing, constructing a small sample data set containing various defects, and dividing the small sample data set into a training set and a test set; (2) constructing an improved twin supervised contrast network model, wherein the model comprises a feature extraction backbone network, an LDFPN and a classification contrast learning head; (3) training the twin supervised comparison network model by using the training set, and adopting joint optimization of cross entropy classification loss and supervised comparison loss during training; and (4) performing defect identification and classification on the shaving board surface image by using the trained twin supervision comparison network model. The method and the system aim at solving the problems of low particle board surface defect identification accuracy and weak model generalization ability under the condition of small samples, efficient and accurate automatic quality detection is realized, and the method and the system have the potential of real-time deployment on a production line.

The invention relates to a composite filler reinforced polyurethane adhesive shaving board and a preparation method thereof. A polyurethane adhesive is prepared from raw materials including polyol, isocyanate, filler and paraffin emulsion. The filler is a blend of kaolin and microcrystalline cellulose, the kaolin is helpful to improve the mechanical properties of the adhesive through physical filling and chemical effects, and the microcrystalline cellulose and the polyurethane adhesive generate strong hydrogen bond interaction to form a tight network structure. And the mechanical strength of the polyurethane adhesive shaving board is improved.

This utility model relates to the field of sawing device technology, and discloses a lubricated and heat-dissipating particleboard sawing device, including a cutting mechanism, a conveying mechanism, and a supporting mechanism. The cutting mechanism is located at the upper end of the supporting mechanism, and the conveying mechanism is located inside the supporting mechanism. The cutting mechanism includes a sliding frame, a rotating frame is fixedly connected to the lower end of the sliding frame, a first motor sleeve is fixedly connected to the upper end of the sliding frame, a first motor is fixedly connected to the inner wall of the first motor sleeve, a belt is provided at the output end of the first motor, a rotating shaft is driven through the inner wall of the belt, and a cutting tool is fixedly connected to the surface of the rotating shaft. This utility model achieves a more stable sawing operation for particleboard by using a sliding frame to move the cutting tool while simultaneously cutting the particleboard by spraying a heat-dissipating and lubricating medium from two nozzles on both sides. This further improves the practicality of the device.

This utility model discloses a heating device for a particleboard laying machine, including a heating chamber and a drive roller. Beneficial effects: This utility model, by employing an internal heating plate and a liftable distribution plate, allows for efficient particleboard laying heating. During heating, the drive motor rotates the drive roller, which in turn rotates the laying belt, conveying the particleboard material. Subsequently, a blower generates flowing air, which enters the distribution plate. The internal heating pipes activate, heating the air and creating hot air that blows onto the particleboard material. Simultaneously, the internal heating wires within the heating plate activate, heating the bottom of the particleboard through heat transfer. This bidirectional simultaneous heating improves heating speed and efficiency. The evenly and densely distributed air outlets ensure high uniformity of air blowing and heating, further enhancing work efficiency. Furthermore, the operator can activate the first electric cylinder to extend and retract, adjusting the distance between the air outlets and the particleboard material, thereby regulating the heating temperature. The structure is simpler and more convenient to use.

The invention relates to a formaldehyde-free environment-friendly adhesive, a formaldehyde-free environment-friendly shaving board and a preparation method of the formaldehyde-free environment-friendly shaving board, and the formaldehyde-free environment-friendly adhesive comprises the following components in parts by weight: 85-90 parts of glycosyl resin composition main glue and 10-15 parts of a curing agent, the preparation method of the glycosyl resin composition main glue comprises the following steps: preparing the following raw materials in parts by weight: 30-40 parts of cane sugar, 10-15 parts of urea, 50-60 parts of water, 2-3 parts of sodium hydroxide, 2-5 parts of tannin, 0.2-0.5 part of a silane coupling agent and 0.1-0.2 part of gas-phase nano silicon dioxide; the preparation process comprises the following steps: adding water into a reactor, then adding cane sugar, urea and tannin, uniformly stirring, heating to 50 DEG C, adding sodium hydroxide after the materials are completely stirred and dissolved, heating to 90-95 DEG C, reacting for 3 hours, cooling to 60 DEG C, adjusting the pH value to 5.5-6.5, adding a silane coupling agent, adding gas-phase nano silicon dioxide, keeping the temperature for 1 hour, cooling and discharging for later use; and the curing agent is liquid polymerized MDI.

The invention discloses a crushing device for recycling plastic particle plates, which comprises a crushing shell and two crushing rollers in the crushing shell, a plurality of crushing heads are arranged on the two crushing rollers, and a motor and a blanking frame connected with the two crushing rollers are mounted on the crushing shell. A discharging frame used for discharging plastic particle plates is located on the shaping frame, the cross section of the discharging frame is of a splayed structure, a large opening of the discharging frame is communicated with the feeding box, and a discharging pulley is movably connected to the end, facing the opening, of the discharging frame and located on the inner wall of the discharging frame. Two sections of connecting rods or two L-shaped locking rods are adsorbed through a magnetic adsorption body, the problem of interference is avoided, a damage frame can drive a damage telescopic rod to move downwards through an arranged stroke sliding groove, so that the effect of pushing a plate is achieved, an arranged return spring enables the damage frame to return to the original position after the damage telescopic rod shrinks, and the damage frame is prevented from being damaged. The next use is convenient.

The utility model discloses a fixing device for chipboard production, which is applied to a chipboard body, a top fixing plate and a bottom fixing plate are respectively arranged at the top end and the bottom end of the chipboard body, side plates are arranged on the sides of the chipboard body, the fixing device further comprises a transverse supporting assembly and a reinforcing piece, and the transverse supporting assembly comprises a transverse plate. A connecting piece is arranged at the end part of the transverse plate; by means of the design of the bottom fixing plate, the transverse supporting assembly and the reinforcing piece, when the shaving board body is fixedly wrapped by the top fixing plate, the side edge plates and the bottom fixing plate, the transverse plate supports the middle of the shaving board body, meanwhile, the reinforcing plate further reinforces and supports the transverse plate, downward bending of the shaving board body is reduced, and the shaving board body is prevented from being damaged. And through penetrating connection of the clamping blocks and the clamping grooves, the clamping blocks can prevent the clamping blocks at the ends of the transverse plates from being separated from the bottom fixing plate under the clamping action of the shaving board body and the bottom fixing plate.

The present invention aims to effectively utilize peeled cores and provides a new and useful method for extracting essential oils. [Solution] This essential oil extraction method comprises the following steps: a preparation step of preparing the peeled core 4 remaining after cutting a log 1 to continuously obtain veneers 3; a crushing step of crushing the peeled core to obtain a crushed material; a distillation step of distilling the crushed material to obtain a distillate; and a separation step of separating the distillate into essential oil and aromatic distilled water. It is preferable that the method further comprises a water removal step of removing minute amounts of water contained in the essential oil obtained in the separation step. The essential oil obtained by this method can be used in the same applications as conventional methods, and the crushed material after essential oil extraction can be reused alone or mixed with other materials in the production of wood fiberboards such as MDF and wood boards such as particle board.

The application belongs to the field of wood adhesives, and discloses a kind of urea-formaldehyde resin with ultra-low free formaldehyde by using cysteine as formaldehyde trapping agent as well as a preparation method and application thereof.The urea-formaldehyde resin with ultra-low free formaldehyde comprises the following raw materials in mass fraction: 30-40 wt% 100-200 parts of formaldehyde aqueous solution, 30-100 parts of urea, 0.1-5 parts of melamine and 0.1-5 parts of cysteine.A urea-formaldehyde resin adhesive with good stability and ultra-low free formaldehyde content is prepared by using cysteine as formaldehyde trapping agent through a synthesis process of "weak base-weak acid-weak base".The urea-formaldehyde resin adhesive synthesized by the application has good adhesive properties, good pre-pressing performance and long storage stability, reduces the amount of melamine used, uses green and environmentally friendly amino acid as formaldehyde trapping agent, reduces production cost, and is suitable for the production and processing of plywood, particle board and medium density fiberboard.