32 results about "Glued laminated timber" patented technology

A method of manufacturing glued laminated wood such as laminated veneer lumber (LVL) is 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 wherein the end joints of the wood sheets are disposed in a staggered array. There is provided an initial base material having an end which is shaped in the form of a flight of steps including a series of alternate horizontal surface having a lengthwise dimension smaller than the length of the wood sheet and a vertical surface having a height corresponding to the wood sheet thickness, and the glued laminated wood board is formed extending from the end of such initial base material. The hot press includes a pair of heat plates each having an effective pressing area capable of covering the entire surface of the wood sheet. In hot pressing a wood sheet having on one surface thereof coated with adhesive, a board of the glued laminated wood in progress is placed and maintained for a predetermined length of time at a position where the entire top surface of the wood sheet is kept to be pressed from the top by one of the plates while the entire lower surface of the wood sheet is supported from the bottom by the other plate.

A method and an apparatus of wood pressing usable in manufacturing glued laminated wood such as laminated veneer lumber (LVL) using a number of wood veneer sheets are disclosed. A hot press used for wood pressing includes a pair of heating plates which are disposed one above the other and have pressing surfaces facing each other. The paired heating plates are both movable toward and away from each other. In operation, firstly one of the heating plates is moved toward the other heating plate to a position where the pressing surface of the one heating plate is spaced from a surface to which a veneer sheet is to be glued by a distance corresponding to the thickness of the veneer sheet. Then, the other heating plate is moved toward the one heating plate until a desired pressure is produced pressing.

The invention provides a method for manufacturing a glue laminated wood material in which wrinkles do not occur even in the case of press molded material. In a glue lamination step in which five or more wood sheets are layered in a layer structure and integrated into a single body with glue, layering in a layer structure is performed in a state such that a grain direction is the same for at least the top two and the bottom two of the wood sheets 1, and the grain direction of one of the wood sheets 2 in the middle is approximately orthogonal to the grain direction of the respective upper and lower two or more wood sheets.

The invention relates to a carbonized figure jointed glulam lumber and a manufacturing method. The carbonized figure jointed glulam lumber is a one-layer integrated board, or one or several layers of lateral battens laying in the sandwich layer and the integrated board with more than two layers is glued in parallel in the direction of thickness. Each layer of the integrated board is made of standard battens formed by gluing many short battens through finger-jointing and tenoning, and then the standard width is formed by gelatinizing on the side of the batten and gluing and joining in parallel. The process of the method includes: log truncation, sawing, carbonization, chopping, finger-jointing, repairing, sanding and repairing; second glue jointing: gelatinizing; testing, warehousing. The advantages are that part of the chemical and physical properties of wood are changed permanently; hydrophilic property of the lumber is reduced and the inner stress is eliminated completely; the color of the wood is darkened and the wood texture is clear; the contained resin inside the wood is removed so that the wood can be glued and finished; the drying operation is substituted by the high temperature carbonization technique; the carbonized figure jointed glulam lumber is of stable size and shape, of no craze and resin and of clear texture and good durability.

The present invention relates to a board complex having a polylactic acid (PLA) cover. The board complex comprises: a cover member having at least one layer containing a PLA resin; and a board formed beneath the cover member, wherein the material for the board is selected from a medium-density fibreboard (MDF), plywood, an asbestos-free cellulose fiber reinforced cement board, a magnesium board, glued laminated timber, a high density fiberboard (HDF), a particle board, ceramic tile, porcelain tile, a ceramic board and a click-fastened board.

The invention discloses a wooden veneer-gluing ventilation window. The window comprises a plurality of ventilation window accessories, each accessory comprises a blade, a vertical rod, a cross beam and a frame which are all made of poplar (or other cheap cork) glued-laminated timber / LVL internal core base materials, the outer surfaces of the base materials are coated with a layer of log rotary-cutwooden veneers, and an adhesive layer is connected between the log rotary-cut wooden veneers and the base materials. The wooden veneer-gluing ventilation window is simple in structure, the problem ofresource scarcity can be solved, and the demands of the customers can be met; by combining the base materials with the veneers, the nondeformable ventilation window can be made, the cost is greatly reduced, and the demands of the customers for ventilation windows made of valuable tree species are met.

The invention discloses a tanning agent myrica modified phenolic resin, and a preparation method and an application thereof. The tanning agent myrica modified phenolic resin is mainly prepared througha reaction of phenol, a formaldehyde solution, tanning agent myrica and a degrading agent, a mass ratio of the phenol to the formaldehyde solution is 1:(1.2-3.0), a mass ratio of the phenol to the tanning agent myrica is 1:(0.2-1.5), and a mass ratio of the tanning agent myrica to the degrading agent is 1:(0.1-0.4). The preparation method comprises: a primary reaction of the phenol and the formaldehyde solution, and a secondary reaction after the addition of the tanning agent myrica and the degrading agent. The tanning agent myrica modified phenolic resin is mixed with a curing agent and a filler to prepare a tanning agent myrica modified phenolic resin adhesive. The tanning agent myrica modified phenolic resin and its adhesive can reduce the use amount of the phenol, shorten the reactiontime, reduce the cost, shorten the curing time and prolong the working life of a glue solution on the premise of meeting national standards of Structural Glued Laminated Timber, and also have the advantages of low toxicity and environmental protection.

The present subject matter relates to a device for coupling two vertical components, comprising a girder made of wood, in particular glued laminated timber, and a connector for each end face of the girder for connecting the end faces to one of the vertical components each. Each connector has two fittings, one of which is mounted via one side on the respective end face of the girder and the other of which can be mounted via one side on the associated vertical component and which fittings can be brought via their other sides into abutment against one another. Further, each connector has two tensioning jaws, which grasp the fittings at diametrical ends and can be tensioned against one another by means of at least one tensioning element running approximately parallel to said other sides. The girder has a bottom chord made of steel, which bottom chord is anchored at each end face of the girder to the fitting mounted thereon. At least one tensioning member is provided for tensioning the bottom chord.

The invention provides a technology for manufacturing a structural glued laminated timber by adopting fast-growing poplars. The steps are as follows: firstly, selecting timber and cutting the timber into plates through an electric saw; secondly, coating a transparent water-based prime paint layer and a fire-retardant paint layer on the cut plates, and controlling the water content of the plates to range from 5% to 8% through fumigating; thirdly, planing the fumigated plates, and coating a ultraviolet light polymerization coating varnish layer and a water-based bright surface paint layer on the planed plates in sequence; fourthly, splicing the timber to form an assembly, and sending the assembly into a hot press to press the plates; fifthly, scissoring the pressed plates by using a cutting edge machine, mending, trimming and packing the plates, and then putting the plates into a warehouse. According to the invention, products have excellent corrosion resistance, snow and rain corrosion resistance, and water and oil resistance; the elastic modulus is 10000-12000 GPa, the bending strength reaches 12 MPa, the gloss is larger than or equal to 89, products have no yellow stains under the 100-110 DEG C / 1h condition, the inflaming retarding effect is excellent, and self-extinguish can be performed within 8 s; products are subjected to hard solidification under the irradiation of a high pressure mercury lamp of 500 W for 4-5 min, are ultraviolet light irradiation resistant, can be used widely, and can replace the conventional materials continuously.