CN103240775B - Solid wood acoustical board and manufacturing method thereof - Google Patents
Solid wood acoustical board and manufacturing method thereof Download PDFInfo
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- CN103240775B CN103240775B CN201310182256.4A CN201310182256A CN103240775B CN 103240775 B CN103240775 B CN 103240775B CN 201310182256 A CN201310182256 A CN 201310182256A CN 103240775 B CN103240775 B CN 103240775B
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Abstract
The invention relates to a solid wood acoustical board. The solid wood acoustical board comprises fast growing wood battens and an adhesive for adhering the fast growing wood battens. The air-dry density of fast growing wood is below 0.6g/cm3. The solid wood acoustical board is characterized by being porous, and good sound-absorbing effect on medium-high frequency sound waves can be achieved without needing to manually open a hole or groove on the board. Not only are production processes and cost reduced, but also the board made of the fast growing wood with the air-dry density below 0.6g/cm3 has the advantages of being light and wide in applied fields.
Description
Technical field
The present invention relates to a kind of acoustical material, particularly a kind of Solid wood acoustical board and preparation method thereof.
Background technology
Sound-absorbing porous material has sound absorption mainly: porosint inside has countless micropore, through each other between hole, and communicated with the external world, when sound wave incident is to material surface by surface, a part reflects away at material surface, and another part then penetrates into material internal forward direction.For making porosint have best acoustically effective, sound-absorbing porous material usually has following architectural feature (1) material internal and has a large amount of micropore or gap, and hole is tiny and be uniformly distributed at material internal; (2) micropore of material internal interconnects, and sound absorption is not played in independent bubble and airtight gap; (3) micropore is outwardly open, makes sound wave be easy to enter in micropore.
China's Wooden sound-absorbing material obtains in recent years and develops rapidly, and according to statistics, we reach 1,000 ten thousand m by annual Wooden sound-absorbing material yield
2above.Beaver board is abatvoix more common in wood-base fibre and particle panel material, and beaver board is that density is at 0.4g/cm
3following fiberboard, the low and porous of this abatvoix density, has good sound-absorbing and heat-proof quality, is mainly used in the sound-absorbing structure of senior building (as theater etc.).The acoustical absorption coefficient NRC of this type of abatvoix can reach 0.5-0.7.But it is poor that wood fibre board has moisture resistance, intensity is low; And fiberboard glue amount is comparatively large, not environmentally.Wooden perforated plate basis conventional on market is in addition made for particieboard and fiberboard, although manufacture craft is relatively simple, shortcoming is that wood materials contains more tackifier, and environmental-protecting performance is general, and acoustical absorption coefficient is poor in medium-high frequency.
Along with the raising day by day of expanding economy and living standards of the people, people are also improving constantly wood materials demand, but world forest resources is increasingly deficient, and particularly the supply of natural high-quality large footpath level timber reduces increasingly, there is larger contradiction between timber supply and demand.Artificial forest, fast-growing woods are one of main paties alleviating timber supply and demand contradiction, but because fast growing wood footpath level is little, material is loosened, intensity is low, so purposes is very restricted.
Therefore, be necessary in fact to develop a kind of method utilizing fast growing wood to make Solid wood acoustical board, not only widen the application of fast growing wood, the more important thing is and solve the not good and more use tackifier of the high-frequency sound-absorbing effect of centering in prior art, be unfavorable for the technical matterss such as environmental protection.
Summary of the invention
In order to solve the problem in the middle of above-mentioned prior art, utilize fast growing wood material to loosen to be applicable to doing the feature of poriness acoustical material, Solid wood acoustical board is made after fast growing wood is processed, not only open up the usable range of fast growing wood, increase the use value of fast growing wood, and Solid wood acoustical board of the present invention has the performance of lightweight, porous, environmental protection, centering high frequency sound wave has good assimilation effect.
In order to realize foregoing invention object, the invention provides a kind of Solid wood acoustical board, it comprises fast growing wood flitch and for tackifier bonding between described fast growing wood flitch, and the air-dry density of described fast growing wood is at 0.6g/cm
3below.
Have been surprisingly found that, air-dry density is at 0.6g/cm
3following fast growing wood has the speciality of porous due to it, when not needing the good sound-absorbing effect that can realize centering high frequency sound wave when carrying out artificial perforate or fluting to plank.Not only reduce production process, reduce cost, and by air-dry density at 0.6g/cm
3the plank that following fast growing wood makes has light weight, application feature widely.
Preferably, the square section of described fast growing wood is in the outside surface of described abatvoix, and described square section is the tangent plane vertical with the trunk direction of fast growing wood.As shown in Figure 1, the outside surface of described abatvoix 23 refers to upper surface 22 and the lower surface (not shown) of abatvoix.
Preferably, the consumption of described tackifier is: when adopting single spreading, single spreading amount is 150 ~ 250g/m
2, as shown in Figure 1, between described fast growing wood flitch, during piece 21 place employing two-sided equal gluing, double spread amount is 200 ~ 300g/m
2, control the consumption of tackifier and can improve its adverse effect to environment and the mankind.
Because the veneer of gummed is thicker, and the flitch Thickness Ratio of gummed is comparatively large, conducts heat in a thickness direction slow, so preferred cold setting adhesive.Further, the example of described cold setting adhesive includes but not limited to white glue with vinyl, phenolics, polyurethane, isocyanates.
The trees kind that fast growing wood of the present invention refers to that growth is fast, becomes a useful person early, the period of felling in turn is short, the example of fast growing wood seeds of the present invention includes but not limited to: willow, China fir, eucalyptus, pine tree.Wherein the density of willow, China fir is little, and flow resistance is large, and wood transverse section has porous structure, large to medium-high frequency acoustical absorption coefficient; The air-dry density of eucalyptus is greater than 0.6g/cm
3, density is large, and flow resistance is little, is unfavorable for the absorption of medium-high frequency sound wave.In specific embodiments more of the present invention, preferred willow and China fir, the acoustically effective of its centering high frequency sound wave is better.
Preferably, the water percentage of described fast growing wood is 6wt%-15wt%, and the object controlling water percentage is to improve acoustical absorption coefficient, and water percentage is increased to more than 20% to be reduced the acoustical absorption coefficient of medium-high frequency.
Another object of the present invention is to the method for making providing a kind of Solid wood acoustical board, it comprises the steps:
1) raw material fast growing wood is the fast growing wood of bar shape, and described raw material fast growing wood cutting is obtained described fast growing wood flitch;
2) bonding by sticking with glue agent between described fast growing wood flitch, obtain described Solid wood acoustical board.
Wherein, described bar shape is nearly cylindrical shape or to be cut into rectangular-shaped or xsect be leg-of-mutton strip or other shape feasible arbitrarily.
In an embodiment of the present invention, the method for making of described Solid wood acoustical board, it comprises the steps:
1) raw material fast growing wood is the fast growing wood of bar shape, is carried out by described raw material fast growing wood cutting or obtain described fast growing wood flitch along square section cutting afterwards by radially bonding to two sections or multistage raw material fast growing wood along its square section;
2) described fast growing wood flitch is all placed along its square section towards the outside surface of described Solid wood acoustical board, and bonding by sticking with glue agent between described fast growing wood flitch, obtain described Solid wood acoustical board.Those skilled in the art will envision that, the surface pattern of the Solid wood acoustical board so obtained by year wheel rim or part year wheel rim form, as shown in Figure 1.
Preferably, above-mentioned method for making also comprises: 3) described plank nonwoven fabrics, color suede or corduroy are covered.Solid wood acoustical board after covering can strengthen sound-absorbing effect, can play decoration function again.
Advantage of the present invention at least comprises:
1. open up the usable range of fast growing wood, increase the use value of fast growing wood;
2. Solid wood acoustical board of the present invention has the performance of lightweight, environmental protection;
3. air-dry density used in the present invention is 0.6g/cm
3following fast growing wood light weight and porous are the sound-absorbing effect that perforate or fluting can realize centering high frequency sound wave without the need to people.
Accompanying drawing explanation
Fig. 1 is the perspective view of Solid wood acoustical board.
Embodiment
Below coordinating accompanying drawing and embodiments of the invention, setting forth the technological means that the present invention takes for reaching predetermined goal of the invention further.
Air-dry density described in the present invention is all intelligible terms of those skilled in the art; In the following embodiments, after choosing the concrete seeds (comprising the information such as its concrete place of production) of described fast growing wood, its air-dry density is by consulting pertinent texts or reference book is learnt.
Medium-high frequency sound wave of the present invention refers to the sound wave of frequency at 500HZ-5000HZ.
Acoustical absorption coefficient of the present invention refer to material absorb and through acoustic energy and the ratio of the total acoustic energy incided on material, represent with α.The material of α < 0.2 is reflecting material, and the material of α >=0.2 is only acoustical material.α is larger, and explanation sound-absorbing effect is better.
For making the present invention easier to understand, describe the present invention in detail below in conjunction with embodiment, these embodiments only play illustrative effect, are not limited to range of application of the present invention, NM specific experiment method in the following example, conveniently experimental technique carries out usually.
Embodiment
Embodiment 1: the making of Solid wood acoustical board
Be 0.6g/cm by density
3following fast growing wood, such as, after poplar cutting is slit into rectangular batten, radial bonding, then cut from end, after cutting, form multistage flitch; Described flitch is carried out edge is bonding forms Solid wood acoustical board, edge joint position normal temperature cured type tackifier, such as white glue with vinyl is carried out gluing.
Embodiment 2: a kind of making of willow abatvoix
Select Hebei to produce the willow in (place of production), its air-dry density is 0.35g/cm
3, water percentage is 10%, and as the solid wood material of this abatvoix, the concrete making step of this willow abatvoix is as follows:
1) after willow material being cut into rectangular parallelepiped wooden unit, radial bonding, then cut along square section from end, after cutting, form multistage willow flitch;
2) described willow flitch is all placed along its square section towards the outside surface of described willow abatvoix, and by bonding by white glue with vinyl between described fast growing wood flitch, obtain described Solid wood acoustical board.The outside surface of the abatvoix so obtained is made up of the square section of timber, and because wood transverse section has porous structure, therefore, the sound absorption qualities of this abatvoix is best;
3) the color suede of described plank is covered, thus can further improve its sound absorption qualities.
Embodiment 3: a kind of making of China fir abatvoix
Select Sichuan to produce the China fir in (place of production), its air-dry density is 0.38g/cm
3, water percentage is 10%, as the solid wood material of this abatvoix, according to the making step identical with embodiment 2, is only change into making tackifier with isocyanates, makes China fir abatvoix.
Comparative example 1: a kind of making of ashtree abatvoix
In a specific embodiment of the present invention, select Jilin to produce the ashtree timber in (place of production), its air-dry density is 0.66g/cm
3, water percentage is 10%, as the solid wood material of this abatvoix, with ashtree timber for starting material are according to the identical making step of embodiment 2, is only change into making tackifier with isocyanates, is made into ashtree abatvoix.
Embodiment 4: to the comparative study of medium-high frequency sound-absorbing effect
Adopt standing-wave-tube method to measure the acoustical absorption coefficient of material, test is undertaken by the guidance of GBJ88-85 " Code for measurement of soundabsorbing coefficient and specific acoustic inpedance of standingwave ".Willow abatvoix, China fir abatvoix and ashtree abatvoix centering high frequency sound wave (500-5000HZ) acoustical absorption coefficient measurement result made in above-described embodiment 2,3 and comparative example 1 are in table 1.
The comparison of the acoustical absorption coefficient of the abatvoix made by the various timber of table 1
| Embodiment | Abatvoix global density (g/cm 3） | Acoustical absorption coefficient α |
| Embodiment 2 | 0.36 | 0.75 |
| Embodiment 3 | 0.38 | 0.69 |
| Comparative example 1 | 0.66 | 0.25 |
For 0.6g/cm
3following fast growing wood, the abatvoix that such as willow or China fir make, not only quality is comparatively light, and centering high frequency sound wave sound-absorbing effect is good.
The above is only the preferred embodiments of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, not departing from the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (8)
1. one kind for absorbing the Solid wood acoustical board of medium-high frequency sound wave, it is characterized in that, described abatvoix comprises fast growing wood flitch and for tackifier bonding between described fast growing wood flitch, the square section of described fast growing wood is in the outside surface of described abatvoix, described square section is the tangent plane vertical with the trunk direction of fast growing wood, and the air-dry density of described fast growing wood is at 0.6g/cm
3below.
2. Solid wood acoustical board as claimed in claim 1, it is characterized in that, described fast growing wood is willow or China fir.
3. Solid wood acoustical board as claimed in claim 1, it is characterized in that, the single spreading amount of described tackifier is 150 ~ 250g/m
2.
4. Solid wood acoustical board as claimed in claim 3, it is characterized in that, described tackifier is cold setting adhesive.
5. Solid wood acoustical board as claimed in claim 4, it is characterized in that, described cold setting adhesive is white glue with vinyl, phenolics, polyurethane, isocyanates or its combination in any.
6. Solid wood acoustical board as claimed in claim 1, it is characterized in that, the water percentage of described fast growing wood is 6wt%-15wt%.
7. the method for making of Solid wood acoustical board according to any one of claim 1-6, is characterized in that, comprise the steps:
1) raw material fast growing wood is the fast growing wood of bar shape, is carried out by described raw material fast growing wood cutting or obtain described fast growing wood flitch along square section cutting afterwards by radially bonding to two sections or multistage raw material fast growing wood along its square section;
2) described fast growing wood flitch is all placed along its square section towards the outside surface of described Solid wood acoustical board, and bonding by sticking with glue agent between described fast growing wood flitch, obtain described Solid wood acoustical board.
8. method for making as claimed in claim 7, is characterized in that, also comprise the steps:
3) described abatvoix nonwoven fabrics, color suede or corduroy are covered.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310182256.4A CN103240775B (en) | 2013-05-16 | 2013-05-16 | Solid wood acoustical board and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310182256.4A CN103240775B (en) | 2013-05-16 | 2013-05-16 | Solid wood acoustical board and manufacturing method thereof |
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| CN103240775A CN103240775A (en) | 2013-08-14 |
| CN103240775B true CN103240775B (en) | 2015-04-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0063715A1 (en) * | 1981-04-20 | 1982-11-03 | Nissan Motor Co., Ltd. | Sound insulating plate |
| CN2537093Y (en) * | 2002-04-15 | 2003-02-19 | 张华君 | Composite wooden sound board with oblique malce-up core |
| CN102110433A (en) * | 2009-12-29 | 2011-06-29 | 沈金祥 | Piano sound board and manufacturing method thereof |
| CN202138006U (en) * | 2011-07-11 | 2012-02-08 | 窦观一 | Multilayer reinforced soundproof board made from fast-growing trees replacing nuclear power and petroleum |
| CN102674792A (en) * | 2012-05-31 | 2012-09-19 | 广州市棕宝纤维制品有限公司 | Plant fiber fireproofing silencing plate |
-
2013
- 2013-05-16 CN CN201310182256.4A patent/CN103240775B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0063715A1 (en) * | 1981-04-20 | 1982-11-03 | Nissan Motor Co., Ltd. | Sound insulating plate |
| CN2537093Y (en) * | 2002-04-15 | 2003-02-19 | 张华君 | Composite wooden sound board with oblique malce-up core |
| CN102110433A (en) * | 2009-12-29 | 2011-06-29 | 沈金祥 | Piano sound board and manufacturing method thereof |
| CN202138006U (en) * | 2011-07-11 | 2012-02-08 | 窦观一 | Multilayer reinforced soundproof board made from fast-growing trees replacing nuclear power and petroleum |
| CN102674792A (en) * | 2012-05-31 | 2012-09-19 | 广州市棕宝纤维制品有限公司 | Plant fiber fireproofing silencing plate |
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| CN103240775A (en) | 2013-08-14 |
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