CN2765749Y

CN2765749Y - Novel timbering of composite bamboo and wooden

Info

Publication number: CN2765749Y
Application number: CN 200520081053
Authority: CN
Inventors: 王传耀
Original assignee: Fujian Agriculture and Forestry University
Current assignee: Fujian Agriculture and Forestry University
Priority date: 2005-01-31
Filing date: 2005-01-31
Publication date: 2006-03-22
Anticipated expiration: 2015-01-31

Abstract

The utility model relates to novel timbering of composite bamboo and wood, which is formed by gluing and hot pressing plate materials which are provided with a plurality of layers. A surface layer, a middle layer and a bottom layer are made of bamboo materials; a sandwich layer which is clamped between the two bamboo materials is integrated by a wooden layer laminated material-a symmetrical equalization assembly of a lamination structure. The surface layer, the middle layer and the bottom layer are generally made of bamboo integrated materials; the sandwich layer generally uses fir intermediate cutting materials as raw materials; the bamboo materials are positioned on the surface layer and the bottom layer; when the composite structure is provided with 5 layers or more than 5 layers, the middle layer is added, therefore the utility model has the advantages of big hardness and big intensity; the core materials are positioned on a secondary middle layer, therefore the utility model has the advantages of strong glue performance, reduced density and increased utilization rate of the bamboo and the wood, and more than 20 percent material cost is decreased.

Description

A kind of bamboo wood new composite structural wood

Technical field the utility model relates to a kind of composite construction sheet material or square bar, particularly a kind of bamboo wood new composite structural wood.

The forest reserves of background technology China are extremely poor, with economy growth and extremely unbecoming to the demand growth of woodwork fast.For the needs that adapt to economic growth must be sought wood substitutes and the artificial fast-growing woods seeds of development.Abroad extensive use timber integrated timber and laminated timber in building trade.Bamboo wood or bamboo cord wood performance are better than similar wood-based product, are domestic bamboo converted products newly developed in recent years, once the market favor occurring being subjected to.But this series products still is in the development stage at present, and the difficult problem that still unresolved utilization rate of bamboo is not high, production efficiency is lower, production scale is less is demanded the industrially scalable development and use urgently.

Domestic wooden integrated timber commonly used mainly is the wooden boards that texture is parallel or scantlings make termination respectively on length or width or the limit spell shape becomes laminate, a kind of novel wooden material that stacked gummed forms on thickness direction again.

Domestic wooden laminated timber commonly used mainly forms through the splicing glue laminated with rift grain veneer (can add a small amount of face crossing).Usually thickness is 18--75mm, and length can not limit.Former size class all can utilize through being peeled into veneer at 10-20cm left and right sides quick-growing plantation small dimension wood, thinnings.Bamboo wood is through fragmentation or be peeled into thin slice and also can utilize.

The patent No. is 87203513 utility model patent " novel building sheet material ", has introduced superimposed the standing up of a kind of use bamboo chip and has done muscle, builds the novel building sheet material that forms with magnesia, for the comprehensive utilization of bamboo wood provides an outlet.

The patent No. is 00224919 utility model patent " a kind of composite board and composite floor board ", has introduced the real bamboo of a kind of composite material for decoration and composite wood floor, and its bottom is made by bamboo plywood, and surface layer is spliced by solid wood plate or real bamboo chip.Have wood substituted by bamboo, replace characteristics such as excellent material with bad material.

The summary of the invention the purpose of this utility model is: adopt bamboo plate or mao bamboon silk splicing glue laminated to become integrated timber to make dash board, make full use of speed and give birth to small dimension wood as core, through matched combined, make have high-performance, bamboo wood new composite structural wood cheaply.

A kind of bamboo wood new composite structural wood of the present utility model is formed by the hot pressing of multi-layered board gluing, it is characterized in that top layer, middle level and bottom are bamboo wood, and the sandwich layer that clips between two bamboo woods is wooden core.Bamboo wood new composite structural wood can be made bamboo-wood composite board, also can make the compound square bar of bamboo wood, and its top layer, middle level and bottom generally adopt bamboo matter integrated timber, is promptly formed by bamboo plate or mao bamboon silk splicing glue laminated.Clip wooden core between two bamboo woods, as laminated timber, particieboard, fiberboard; The wooden laminated timber of general employing is promptly formed by the stacked gummed of Wooden veneer.Wooden core is a raw material with the China fir thinnings generally.

A kind of bamboo wood of the utility model new composite structural wood is a sandwich construction, adopts integrated-laminated structure symmetrical equilibrium combination.For example, when bamboo wood new composite structural wood is seven layers of combination, have top layer, bottom and 2 middle levels, 3 sandwich layers; When bamboo wood new composite structural wood is five layers of combination, have top layer, bottom and 1 middle level, 2 sandwich layers; When bamboo wood new composite structural wood is three layers of combination, have top layer, bottom and 0 middle level, 1 sandwich layer, promptly there is not the middle level on the structure.The rest may be inferred for the bamboo wood new composite structural wood of more multi-layered combination.Bamboo wood new composite structural wood is generally combined by 3～11 layers bamboo matter integrated timber and wooden laminated timber.

The advantage of a kind of bamboo wood new composite structural wood of the present utility model: adopt integrated-laminated structure symmetrical equilibrium combination, its top layer adopts bamboo plate to become integrated timber along fiber parallel width assembly glue or length direction splicing glue laminated, has high-intensity characteristics on the physical mechanics.Theory of mechanics according to composite, sheet material is done the time spent at the plus load that is subjected to the vertical panel face, bending stress is mainly born by the material near the top layer, and sandwich layer mainly bears the shear stress effect, and the material that intensity is big can bear bending stress more greatly more greatly apart from the sheet metal thickness center.Bamboo wood is in top layer (structure is set up the middle level more than 5 layers or 5 layers), has the good characteristics of the big intensity of hardness; Wooden core is in time middle level, and it is strong to have gummed power, can reduce the advantage of density.

In addition, wooden core and middle layer material are raw material with China fir thinnings and mao bamboon silk generally, have inexpensively, improve comprehensive utilization ratio, the advantage that reduces cost.The utilization rate of bamboo of various artificial bamboo boards is according to statistics: bamboo wood laminate about 50%; Bamboo mat, bamboo plywood 45%～50%; Bamboo plywood 35%～40%; The direct utilization rate of bamboo wood only was 20%～25% during the bamboo floor produced.Bamboo wood new composite structural wood of the present utility model can be brought up to the utilization rate of bamboo wood more than 80%, also utilize cheap China fir thinnings to be core, can reduce cost of material more than 20%, for China's bamboo wood industrial expansion has brought opportunity, " wood substituted by bamboo ", " winning wood with bamboo " serve as to alleviate the nervous situation of China's wood supply to have brought into play extremely long-pending effect.

Appended drawings is a bamboo wood new composite structural wood schematic diagram.

The specific embodiment is in order fully to disclose a kind of bamboo wood new composite structural wood of the present utility model, and existing is example with five layers of bamboo wood new composite structural wood, is illustrated in conjunction with the accompanying drawings.

A kind of bamboo wood new composite structural wood adopts integrated-laminated structure symmetrical equilibrium combination as shown in drawings: the integrated timber that top layer 1 becomes with bottom 5 employing bamboo plate splicing glue laminateds; Near top layer 1 be sandwich layer 2, adopt the Wooden veneer laminated timber; The integrated timber that middle level 3 adopts mao bamboon silk splicing glue laminated to become; Near bottom 5 be sandwich layer 4, adopt the Wooden veneer laminated timber; It is raw material that laminated veneer lumber adopts the China fir thinnings, forms with rift grain veneer or face crossing splicing glue laminated; Whole composite bamboo-timber structure material is that the hot pressing of each layer gluing is formed.

The structure of bamboo wood new composite structural wood is analogized more than five layers.

Claims

1, a kind of bamboo wood new composite structural wood is formed by the hot pressing of multi-layered board gluing, it is characterized in that top layer, middle level and bottom are bamboo wood, and the sandwich layer that clips between two bamboo woods is wooden core.

2, a kind of bamboo wood new composite structural wood according to claim 1 is characterized in that core formed of wood adopts wooden laminated timber.

3, a kind of bamboo wood new composite structural wood according to claim 1 is characterized in that top layer, middle level and bottom adopt bamboo matter integrated timber.

4, a kind of bamboo wood new composite structural wood according to claim 2 is characterized in that sandwich layer is a raw material with the China fir thinnings.