136 results about "Laminated veneer lumber" patented technology

The invention discloses a carbon fiber fabric reinforced poplar laminated veneer lumber structural element and a machining method thereof. The structural element is characterized in that the structural element is prepared by alternately laminating and bonding poplar rotary slices (1) and carbon fiber fabric (2), and the structural element fully exerts the advantages of carbon fiber fabric and Italian poplar laminated veneer lumber, greatly improves the mechanical property of an Italian poplar material and the added value and the technological content of poplar production, and greatly broadens the application of field of the Italian poplar through the control of the process flow. Moreover, the structural element can avoid the problems of common anchor failure, peeling breakage and the like when the carbon fiber fabric is adhered outside and exerts the strength of the carbon fiber fabric more fully, so that the structural element can be manufactured into a large-scale lumber structural element and solves the problem that the large-scale lumber structural element cannot be produced currently.

The invention discloses complete production equipment for laminated veneer lumbers, which comprise an abrasive belt slant milling machine, a glue spreading machine, a veneer performing press, a material storing table and a multilayer thermal press. The complete production equipment is characterized by arranging a telescopic feeder and a numerical control locating assembly machine in sequence between the glue spreading machine and the veneer performing press, and a movable cutting saw and a conveying roller are arranged in sequence between the veneer performing press and the material storing table, wherein the abrasive belt slant milling machine, the glue spreading machine, the telescopic feeder, the numerical control locating assembly machine, the veneer performing press, the movable cutting saw, the conveying roller, the material storing table and the multilayer thermal press are connected in sequence to form a production line through an operating platform. Compared with the traditional complete production equipment for laminated veneer lumbers, the invention saves equipment investment, the location of the lumbers is very accurate due to the adoption of the numerical control locating assembly machine, production efficiency and product quality are obviously improved, assembled veneers can be infinitely prolonged, the production field of the laminated veneer lumbers is widened, and meanwhile, the degree of automation is also obviously increased.

A water resistant structural board suitable for use in a wall system is disclosed. The structural board has water drainage channels on at least one of its surfaces to drain any water trapped behind the sealed wall system. The water drainage channels may be imparted into the structural board during or applied subsequent to a board production process, and the produced board is shipped to the construction site for a wall installation. When desired, the channeled surface of the structural board may be laminated, coated, or sprayed with a water resistant layer to further enhance the water resistant property of the board. A wall system including the disclosed structural board does not require a layer-by-layer installation of a component having water resistant property and a component having water drainage channel structure at a work site; therefore, labor cost and installation time may be reduced significantly. Examples of structural boards are oriented strand board, plywood, particle board, oriented strand lumber, dimensional lumber, fiberboard, wafer board, chipboard, laminated veneer lumber, and any substantially equivalent wood composite board known in art.

The invention relate to an artificial quick-growing natural plywood, which comprises a common plywood, a laminated veneer lumber, a blockboard, a wedge joint boardand and a technical wood. A dhesive obtained by chemically modifying a plant protein raw material is used for the invention, and the drying and dewatering are carried out after the steps of glue spreading and assembly in the process of processing the plate. The obtained plywood has a high bonding strength, no harmful gases such as aldehyde, beneze, etc., are discharged in the process of processing the plate and during the using period, and the waste plate does not cause the environmental contamination during the degradation in a natural environment. The artificial quick-growing natural plywood fundamentally terminates the harm done by the material selection and adhesives to the environments and the health of the human beings, realizes true production of environment-friendly artificial boards, and ensures that the artificial boards have the same natural properties as the saw log products made from raw wood both in process of production and use.

The invention relates to an impregnation densified veneer enhanced laminated veneer lumber and a manufacturing method of the impregnation densified veneer enhanced laminated veneer lumber, the impregnation densified veneer enhanced laminated veneer lumber structurally consists of an impregnation veneer or / and an impregnation densified veneer and a wood veneer, wherein the impregnation veneer or the impregnation densified veneer is used as the surface layer and the subsurface layer of a laminated veneer lumber plate blank or all layers of the plate blank and is used for increasing the modulus of elasticity and the static bending strength of the laminated veneer lumber. The impregnation densified veneer enhanced laminated veneer lumber has the advantages that: a thick veneer made of fast-growing wood is adopted as raw material to manufacture the impregnation densified veneer enhanced laminated veneer lumber, the intension is high, the dimensional stability is good, the physical mechanical property can meet the requirement of structural laminated veneer lumber standard in China, the impregnation densified veneer enhanced laminated veneer lumber can totally replace high-quality solid wood converted timber and can be used in a constructional engineering structure and used as a high class cement concrete framework, heavy electro machinery packing material and the like. The fast-growing wood is utilized effectively and comprehensively, nature timber resources are saved, the ecological environment is protected, the additional value of a product is increased, and the supply and demand contradiction to major diameter class nature timber in domestic market is remitted.

The invention discloses a manufacturing method of a laminated veneer lumber, which comprises the following steps of: 1) material preparation; 2) carbonization; 3) maintaining; 4) gluing and laying up; 5) cold pressing; 6) hot pressing; 7) edging and sawing; 8) and sanding and packaging. The manufacturing method of the laminated veneer lumber is simple, and the manufactured laminated veneer lumber has good size stability and high structural strength and is not easily deformed.

A method and apparatus of manufacturing glued laminated wood such as laminated veneer lumber (LVL) are disclosed. The glued laminated wood is made of a number of wood sheets such as veneer sheets which are laminated together by a hot press with a thermosetting adhesive into a continuous length of multiple-layered board of the glued laminated wood wherein wood sheets in each layer of the multiple-layered board are arranged in a staggered relation in the lengthwise direction of the board to wood sheets in an adjacent layer. The hot press has a pair of heating plates arranged substantially in facing relation to each other and an auxiliary heating plate disposed adjacent to one end of each heating plate. The auxiliary heating plate is adapted to press part of wood sheet which extends out beyond the above end of the heating plate.

A fiber reinforced composite laminate with fibers generally oriented along two major axes and having a polyurethane resin matrix suitable for reinforcing wood based substrates such as trailer / container flooring, glulams, plywood, particle boards, laminated veneer lumber, and oriented strand board, is provided. The laminate is produced by pulling the fibers through a resin injection box, where a polyurethane resin is injected into the box to wet the fibers. The polyurethane resin wetted fiber layer is then covered with a release media on the top and bottom sides of the layer. The sandwich of fiber, resin and release media is fed to a double belt press capable of applying pressure and heat to consolidate and cure the laminate. The laminate thus made can be thinner than 0.080 inch and provides excellent flatness compared to pultruded thin laminates.

The invention discloses a method for manufacturing an indoor environmentally-friendly flame retardant blockboard. The method comprises the following steps of: manufacturing brush wood and small-diameter wood into rectangular battens with the same thickness; arraying and bonding the rectangular battens to form coreboards through extrusion and surface sanding; obtaining poplar laminated veneer lumbers and fully immersing the poplar laminated veneer lumbers in the solution of water base flame retardant agents at the concentration of 20 percent for flame retardant treatment; drying the treated poplar laminated veneer lumbers and gluing on one side; covering the glued poplar laminated veneer lumbers on two side surfaces of the coreboard, and then performing cold pressing, hot pressing and sanding treatment; gluing and bonding poplar rotary cut skins on the two side surfaces of the sanded plates, and then performing ageing, the cold pressing, repairing, the hot pressing and polishing; and finally trimming the four sides of the polished plates and repairing cracks caused by trimming to obtain the finished flame retardant blockboard. The blockboard manufactured by the method has a good flame retardant property and a small number of influences on texture properties; moreover, the method has the advantages of simplicity, easy application, short production period, high efficiency and low cost.

The invention belongs to the technical field of wood processing and relates to a high-strength poplar laminated veneer lumber and a manufacturing method thereof. The high-strength poplar laminated veneer lumber is structurally formed by sequentially laminating and gluing poplar veneers, glass fiber cloth and carbon fiber cloth, the glass fiber cloth is arranged above the carbon fiber cloth, and the poplar veneers are arranged at the top and the bottom. The manufacturing method of the high-strength poplar laminated veneer lumber includes: preparation of poplar veneers, impregnation of the fiber cloth, gluing of the poplar veneers, assembly along textures, adding of the fiber cloth, staged hot pressing, cooling and reconditioning. By means of enhancement function of the two types of fiber cloth, strength of the laminated veneer lumber is improved, weather resistance is improved evidently, and the laminated veneer lumber is more stable in size. By adoption of staged hot pressing technique for twice staged hot pressing of the laminated veneer lumber, hot pressing period is shortened, productivity is improved, and improvement of mechanical property of the laminated veneer lumber is facilitated due to secondary hot pressing among part of layers.

The invention provides a manufacturing method of an I-shaped wood laminated veneer lumber (LVL). The manufacturing method comprises the following steps: adjusting the water content of wood veneers to be 5-15%; coating a phenolic resin adhesive or urea-formaldehyde (UF) resin adhesive on the surfaces of the wood veneers, laminating and assembling the wood veneers in parallel along the grain, cold pressing to obtain a core strip board blank, and sawing the board blank into core strips with the width of 10-45cm; coating a phenolic resin adhesive on the surface of complete sheet veneers at even-numbered layers; assembling the veneers in parallel along the grain to obtain a face veneer of the LVL, and vertically placing the core strips on the face veneer to be taken as a core layer of the LVL; and hot-pressing the assembled board blank at the temperature of 150-180 DEG C and the pressure of 1.2-1.4 MPa for 15-35s / mm to finally obtain the I-shaped LVL. In the manufacturing method, anisotropy of wood is fully utilized so as to greatly improve the strength of the fast-growing wood LVL without increasing a reinforcing material, and the obtained product meets the requirements of the structural LVL standard in China. Therefore, the manufacturing method provided by the invention has the advantages of high utilization ratio of raw materials, short production cycle and low production energy consumption.

The invention provides high-strength thick laminated veneer lumber which is simple in structure, low in cost and excellent in mechanical property simultaneously. The high-strength thick laminated veneer lumber is formed by gluing, assembling, pressing and bonding a plurality of layers of veneers. Carbon fiber cloth is arranged between the first layer of veneer and the second layer of veneer, between the last first veneer and the last second veneer and between the two layers of medium veneers.

The invention disclose a manufacturing method for laminated veneer lumber of fir used in composites of wind blades, comprising the following steps: 1) fir sapwood dimension board is assembled to manufacture glulam wood beams which run in grain direction and are mutually parallel and glulam glue is painted among the glulam wood; 2) the glulam wood beams are sliced along radial direction into the laminated veneer lumber of fir with appropriate thickness; 3) the laminated veneer lumber of fir is steeped in and is coated with epoxy mixing dipping resin; 4) the laminated veneer lumber is assembled running in grain direction, which is glued through a hot press. The invention not only has the simple method, but also can produce a large quantity of laminated veneer lumber of fir that meets the requirements of the composites of the wind blades.

The invention discloses a method for manufacturing laminated veneer lumber by using wood to solve the problem that the laminated veneer lumber with high strength and simulated rich textures cannot be produced in the conventional methods. The method comprises the following steps of: (1) manufacturing the wood into veneers with the thickness of 0.3-5mm, and performing gum dipping and drying on the veneers, wherein the length and width dimensions of the veneers are the same as those of an internal mold of a mold, or the width dimension of the veneers is consistent with that of the internal mold and the length dimension of the veneers is a fraction of that of the internal mold; (2) superposing the veneers to obtain a blank, putting the blank into the internal mold of the mold, and ensuring that an included angle between a groove bottom and a groove wall is a fillet with the radius of R, wherein the R is more than or equal to 3mm and less than or equal to 20mm, the groove wall is provided with corresponding holes on the same horizontal plane, and the corresponding holes are matched with a pin; (3) pressing the blank in the internal mold of a movable mold of a press, making a pressing plate positioned below the corresponding holes, locking the internal mold by using the pin to penetrate the corresponding holes, and heating and curing the locked internal mold and the blank; and (4) cooling, detaching the pin, demolding the blank, ensuring that the exposed surface of the blank is provided with simulated annual rings, putting the blank in a natural environment, sheeting according to the annual rings of the blank, and ensuring that sheets have the simulated annul rings.

The invention discloses a parquet using laminated veneer lumber strip as base material and the production method thereof. The parquet is composed of a surface layer and base material or composed a surface layer, a bottom layer and base material there between. The base material is laminated veneer lumber strip which is manufactured by dividing the laminated veneer lumber into strips; In the dividing process, the sawing direction is perpendicular to the surface of the laminated veneer lumber while parallel with the fiber of the laminated veneer lumber; and the sawed surface while dividing is used as compounding surface to the surface layer. The parquet produced in the invention achieves the advantages of high size stability, excellent mechanical properties and low manufacturing cost.

The invention discloses a method for making a non-formaldehyde laminated veneer lumber from gum wood. The invention solves the problems of deformation and warpage which are easy to generate when the laminated veneer lumber is made from the gum wood mainly by carrying out drying, softening and assembling treatment on the gum wood and carrying out softening treatment on a gum wood veneer through a scientific and reasonable assembling mode, so that the laminated veneer lumber made from the gum wood has a stable structure and is difficult to warp. Not only can the construction of artificial forest be promoted, but also the wood product with high value can be provided for the society, the problem of reasonably and efficiently utilizing the small diameter-class gum wood in the artificial forest is solved, and the method has great significance under the current situations of shortage of wood resources and supply and demand contradiction.

The invention discloses a glass fiber reinforced laminated veneer lumber and a producing method thereof and aims to provide a light high-strength reinforced wood building material which has simple structure and can be processed and produced easily. The material comprises glass fiber products and wood veneers, and the glass fiber products are arranged between two veneers at the bottom layer of the laminated veneer lumber, wherein angular separation formed by the longitudinal and latitudinal fiber of the glass fiber products and the fiber of the veneers ranges from 0 to 90 degrees. The producing method of the glass fiber reinforced laminated veneer lumber comprises the following steps: spreading glue on veneers, wherein the glue selects phenol aldehyde resin, and the single spread is 120-220g / m<2>; assembling blanks along with the grain and adding a glass fiber reinforced layer, and then aging for 10-60 min; and hot-pressing at the temperature of 130DEC G-180 DEG C for 0.7-1.7 min / mm (veneer thickness), wherein the blank compression ratio is 10%-50%. The method can greatly improve the elastic modulus and the bending strength of the laminated veneer lumber.

The invention discloses glass fiber reinforcement poplar veneer laminated lumber and a production method thereof and aims at providing the glass fiber reinforcement poplar veneer laminated lumber which is simple in production method, high in material utilization rate, wide in application, low in cost, high in strength and excellent in performance and the production method of the glass fiber reinforcement poplar veneer laminated lumber. Poplar veneers are stacked and glued through adhesive agents to form the laminated lumber. The glass fiber reinforcement poplar veneer laminated lumber is characterized in that glass fiber cloth layers are respectively clamped between the poplar veneers of a first layer or a second layer or a third layer above or below the laminated lumber. The poplar veneers serve as raw materials, glass fiber cloth serves as a reinforcement material, and the glass fiber reinforcement poplar veneer laminated lumber manufactured through the laminating compounding method has high strength and excellent weather resistance. The glass fiber reinforcement poplar veneer laminated lumber can not only serve as structural veneer laminated lumber, but also provide a basis for high-grade laminates of structural laminated lumber manufactured with poplar, and accordingly an effective approach is opened up for utilizing low-quality lumber such as man-made forests to manufacture structural wooden engineering materials.

The invention provides a continuous forming system for a laminated veneer lumber (LVL), which is a novel equipment invention in the field of wood processing in China, can replace similar imported equipment to improve the processing and utilizing efficiency and quality of fast-grow forest woods. The system comprises a belt conveyer, a mobile forming head and a forming belt conveyer, and is mainly used for continuous lengthening and forming of each veneer of the laminated veneer lumber. The continuous forming system has the advantages of realizing continuous lengthening and forming to the veneer, overcomes the defect that the traditional process requires manual forming, improves the processing efficiency of forming, and reduces the manual cost of forming; in the forming process, the veneer can be accurately positioned and lengthened, and the joint of each veneer is regularly separated, so as to ensure that higher quality and strength of the laminated veneer lumber after forming to accord with the requirement of international laminated veneer lumber quality standard; and continuously lengthening and forming avoids material waste caused by multiple times of trimming of the laminated veneer lumber to improve the material utilization of the veneer.

The invention belongs to the field of wood processing and discloses a method for manufacturing curved laminated veneer lumber. By the method, a plurality of layers of veneers are parallelly assembled, glued and hot pressed along the grains according to the following conditions: a, each veneer has the same breadth size and the moisture content of lower than a fiber saturation point; b, loose sides and tension sides or front sides and back sides of all veneers are kept in the same direction during parallely assembling; and c, one or more parameters of the veneers, such as the moisture content, thickness and density are increased or reduced layer by layer. In the method, the conventional plane hot press can be directly used without a die, so the production cost is saved, and the production cycle is shortened. As the bending of a product is determined by the nature of the laminated veneer lumber and is not influenced by the action of external force, the problem of serious resilience is solved, and sustained bending of the laminated veneer lumber can be realized.

An aqueous water repellent useful in the treatment of substrates of lignocellulose-origin materials or the like is characterized by comprising the product of co-hydrolytic condensation of (A) 100 parts by weight of an organosilicon compound having the formula:(R1)a(OR2)bSiO(4-a-b) / 2  (1)wherein R1 is alkyl, R2 is alkyl, 0.75≦a≦1.5, 0.2≦b≦3 and 0.9<a+b≦4, and (B) 0.5-49 parts by weight of an amino-containing alkoxysilane having the formula:R3R4NR5—SiR6n(OR2)3-n  (2)wherein R3 and R4 are H or alkyl or aminoalkyl, R5 is a divalent hydrocarbon group, R6 is alkyl, and n is 0 or 1, or a partial hydrolyzate thereof in the presence of an organic acid or inorganic acid.

The invention discloses a manufacturing method of a whole-piece bamboo-bunch veneer and an overlong bamboo-bunch laminated veneer lumber. The method comprises the specific steps that a raw material is selected and pretreated; bamboo wood is conveyed to brooming rolling equipment in a rift grain direction; the conveyed bamboo wood is broomed, beaten and rolled by the equipment, and is subjected to devillicate treatment after a plurality of periods to be manufactured into bunchiness fibers with uniform specifications; bunchiness fiber units that are arranged tightly and orderly in the rift grain direction are discharged; the bunchiness fiber units are sewn or bonded to ensure that the bunchiness fiber units in the same row are connected together; a bamboo-bunch veneer is manufactured; the whole-piece bamboo-bunch veneer is manufactured; a plurality of whole-piece bamboo-bunch veneers are overlaid, assembled, and subjected to cold pressing and heat pressing treatment; and the finished overlong bamboo-bunch laminated veneer lumber is manufactured. The whole-piece bamboo-bunch veneer and the overlong bamboo-bunch laminated veneer lumber manufactured by the method are uniform in density; the raw material can be saved greatly on the premise that national standards are met; bamboo green and tabasheer in the raw bamboo wood can be kept; and bamboo wood consumption and waste of manpower and material resources caused by removing the bamboo green and the tabasheer in the prior art can be avoided.

The invention discloses a production method of laminated veneer lumber. The method comprises the following steps of: (1) preparing a single veneer; (2) coating and assembling; (3) intermittently prepressing; (4) interrupting an assembly plate; (5) thermally pressing; (6) trimming and sawing; (7) sanding; and (8) packaging and putting in a storehouse. The invention simplifies the original production process step, saves raw materials and equipment and reduces the power consumption. The production method can be adopted to save a lot of wood resources by avoiding longitudinally trimming both ends of a laminated veneer lumber blank, also strictly prevent single veneer seams of all layers from superposing, improve the quality of the laminated veneer lumber, save time and labor and improve the working efficiency by avoiding adjusting equipment because of the specification requirement in the production process.

The invention discloses a flame-retardant laminated veneer lumber wooden fireproof door and a manufacturing method thereof. The manufacturing method comprises the following steps of: manufacturing flame-retardant laminated veneer lumber by using low-grade fast growing wood; and manufacturing a door frame and a door leaf framework by using the flame-retardant laminated veneer lumber, wherein the door frame consists of a vertical frame and a horizontal frame through tenon combination; the door leaf framework consists of two edge horizontal keels, two edge vertical keels, a plurality of middle vertical keels and a plurality of middle horizontal keels through tenon combination; the longitudinal textures of the wood grain of the laminated veneer lumber are parallel to the length directions of the frames of the door frame and the keels of the door leaf framework, and an adhesive layer surface is vertical to the surface of the door leaf; the width of the frames of the door frame is 90 to 110mm, and the thickness is 40 to 50mm; and the width of the edge keels of the door leaf framework is 50 to 60mm, the width of the middle keels is 40 to 50mm, and the thickness of the door leaf framework is 35 to 40mm. The flame-retardant laminated veneer lumber wooden fireproof door is made of the low-grade fast growing wood, the use value of the low-grade wood is improved and natural forest resources are protected.

The invention provides a glued board aldehydeless starch gum and a preparation method. The starch gum of the invention is made of the material components with the weight portions of 100 portions of starch, 0.4-1.2 portions of alkali, 1-3 portions of oxidant, 0.5-1 portions of initiator, 8-20 portions of grafting agent and 0.2-0.5 portions of preservative. In the preparation method, starch suspension liquid is obtained; alkali is added for activating the suspension liquid; pH value is adjusted; oxidizer is selected for oxidizing the activated starch suspension liquid; the initiator is introduced; polymer monomeric compound is adopted for grafting. The product of the invention has the advantages of nontoxic and harmless performance, low price, biodegradable performance and environmental protection. With good adhesion property, the glued board aldehydeless starch gum is especially applied to press poplar glued boards and laminated veneer lumbers. The adhesion strength accords with the national standard requirement. Belonging to the aldehydeless environmental protection adhesive, the glued board aldehydeless starch gum can play a positive role in promoting the industrialized and development of abundant poplar fast growing areas (such as northern Jiangsu).

The invention relates to a packaging type corrugated enhanced laminated veneer lumber and a manufacturing method thereof, wherein the packaging type corrugated enhanced laminated veneer lumber structurally comprises a wood veneer and glass fiber cloth, wherein the wood veneer is applied with phenolic resin or urea resin, single spreading is 150-220g / m<2>, the spread wood veneer is assembled with the grain and put in a gum-dipped glass fiber cloth, the warp-direction fiber of the glass fiber cloth is parallel to the fiber direction of the wood veneer, the glass fiber cloth is used as secondary surface layers of the upper side and the lower side of the laminated veneer lumber after being gum-dipped and dried and used for improving elastic modulus and rupture modulus, and the laminated veneer lumber is in a corrugated shape and manufactured by a mould pressing method. The invention has the advantages that quick-growing wood veneers are used as raw materials to manufacture the packaging type corrugated enhanced laminated veneer lumber, once moulding forming is carried out, and the packaging type corrugated enhanced laminated veneer lumber has high strength and good dimension stability, can substitute the existing solid pallet and plywood combined pallets, is applied to the package and transportation fields. The quick-growing wood is utilized, thus reducing logging of natural timber resources and protecting ecological environment.

Most processes currently being proposed and / or used for the production of lignin from kraft or soda black liquors are capable of producing two main types of lignin: high residual content (HRC) lignin and low residual content (LRC) lignin. Surprisingly, it was discovered that HRC lignin, is a suitable ingredient in alkaline adhesives, particularly wood adhesives of the phenolic type (e.g. resole resins). This biomaterial is environmentally green and remarkably low cost, which makes it an industrially viable material to be used as a novel and major ingredient in phenolic adhesives for the manufacture of exterior grade plywood, laminated veneer lumber, oriented strand board (OSB) and other wood products—this was successfully demonstrated in a number of laboratory experiments as well as several different mill trials. The composition, preparation and application of such wood adhesives are hereby disclosed.

The invention discloses a carbon fiber cloth reinforced poplar laminated veneer lumber and a making method thereof, relates to a laminated veneer lumber and a preparation method thereof, and aims to solve the problems that the mechanical strength of the conventional poplar laminated veneer lumber is low, an interface bonding capability of carbon fibers and lumber is poor, and delamination is easily caused. The carbon fiber cloth reinforced poplar laminated veneer lumber is made from seven poplar veneers and two pieces of carbon fiber cloth, and sequentially comprises a poplar veneer I, one surface-treated carbon fiber cloth, a poplar veneer II, a poplar veneer III, a poplar veneer IV, a poplar veneer V, a poplar veneer VI, the other surface-treated carbon fiber cloth and a poplar veneer VII from top to bottom. The preparation method comprises the following steps: firstly pre-treating the carbon fiber cloth, then gluing, and finally thermally-pressing to obtain the carbon fiber cloth reinforced poplar laminated veneer lumber. According to the invention, the carbon fiber cloth reinforced poplar laminated veneer lumber and the preparation method thereof can be obtained.