WORKABLE THERMO-ACOUSTIC WOOD BOARD

Abstract

Board of natural or composed wood that improves the thermo-acoustic and vibrational properties of the original raw material, and it is used in various ways as constructive part of internal and external finishing (doors, windows, panels, party wall, supports, etc. . . . ). The wood boards are made by two or more incisions along the longitudinal direction, continuous and/or discontinuous, belonging to planes which are parallel and/or inclined to each other. The single incision lies on a plane which is parallel and/or inclined compared to the different surfaces of the bar. In the created cracks, suitable acoustic insulating, soundproof or sound-blocking materials are inserted that improve further the final soundproofing and even the thermal insulation.

Description

TECHNICAL FIELD

The current invention deals with a board of natural or composed wood (chipboard, MDF, plywood, oriented strand board, glued laminated timber, etc. . . . ) which improves the thermo-acoustic and vibrational properties of the original raw material, and it is used in various way as constructive element for the internal and external finishing.

BACKGROUND ART

The wood boards known till now, are used in the various constructive elements in the original state, and for this they have the disadvantage of having poor insulating properties against acoustic pollution.

Noise pollution is a problem particularly felt by the public opinion, and it is an essential parameter to determine the life's quality of a person. Noise pollution means: “the introduction of noise in the living or external environment so as to cause annoyance or disturbance to the rest and to the human activities, danger to the human health, deterioration of ecosystems, of material assets, of monuments, of living or external environment or so as to interfere with the legitimate uses of those environments.”

DISCLOSURE OF THE INVENTION

To improve the acoustic-insulating power of the wood, which quantifies its ability to reduce the transmission of incident sound on it, you operate directly on the main component, that is the wood. The sonic waves are propagated more easily through rigid materials and surfaces rigidly linked.

The invention modifies the property of rigidity of the wood board, through the execution of two (FIG. 1) or more cuts (FIG. 2) along the longitudinal direction of the bar. The cuts truncate the cohesion of wood fibres, producing a discontinuity, which reduces the rigidity of the component.

In the created cracks, suitable acoustic insulating, soundproof or sound-blocking (FIG. 10 letter A) materials (metals, textiles, plastics, rubber, mineral wool, synthetic fibres, etc. . . . ) are inserted that improve further the final acoustic insulation.

Indeed the use of these materials, which have different physical properties (density, elasticity, heat capacity, etc. . . . ) compared to wood, limits the transmission of additional frequencies of propagated acoustic waves.

In addition, the filling of cracks regains a small part of the structural strength, lost because of the mentioned cuts, and improves the total thermal resistance.

The heat transfer coefficient is the amount of heat moved in a direction perpendicular to a surface of unit area, because of a temperature gradient, in unit time and under steady state conditions.

The materials inserted in the cracks have often heat transfer coefficient lower than those of wood, and therefore improve slightly the global thermal insulation of the bar.

The tangential components of the incident sonic waves arrive, at a certain point, to coincide with the frequencies of bending resonance of the component, so that on the output face of this there are not only the sonic waves, which were able to pass, but also those caused from resonant vibrations of the element.

Instead, the modified wood board changes the resonant frequency of the structure and does not amplify the output vibrations.

Reference terminology:

• • Length of cut: longitudinal direction of the bar;
  • Width of cut: transverse direction perpendicular to the surface of the bar;
  • Depth of cut: transverse direction parallel to the surface of the bar.

The wood boards are made by two (FIG. 1) or more incisions (FIG. 2) along the longitudinal direction, continuous and/or discontinuous, belonging to planes which are parallel to each other (FIGS. 1 and 3) and/or inclined (FIG. 4).

The single incision lies on a plane which is parallel (FIGS. 1 and 2) and/or inclined (FIGS. 3 and 4) compared to the different surfaces of the bar.

The cut of a surface is long as the entire wood board (FIG. 5) or it is formed by several cracks (FIG. 6) of different length, width and height, belonging to the same plane (FIG. 6), and/or to several planes parallel to each other (FIG. 7) and/or to several planes inclined to each other (FIG. 8).

The height of the cracks of the wood bar has equal or unequal thickness compared with the height of the cuts made on the same side and/or on different sides of the wood bar.

The width of the cracks of the wood bar has equal or unequal depth compared with the width of the cuts made on the same side and/or on different sides of the wood bar.

The cuts affect the structural strength of the wood board that still remains suitable as a constructive element for internal and external finishing, except to withstand structural loads.

In fact, empirical tests have showed that the wood board keeps a good resistance to the applied loads, suitable for applications such as the construction of party walls and the execution of supports for different uses.

The area of application of the current invention is the construction sector, in which the find belongs to the class of basic semi-finished, and it can be used both as a finished element (FIG. 10), and as a structural component for the support of other elements.

The wood board is workable, in order to obtain frames (FIG. 10) and other products, with the usual machines and tools existing in the timber industry.

The wood bar is used alone (FIG. 5), or it is assembled in a modular way (FIG. 9), matching the various elements to form a continuous wood panel.

The current invention is used in various ways as constructive part of internal and external finishing, with the intention of improving the thermo-acoustic and vibrational insulation; for examples the wood board is used as component for the production of doors, overhead doors, windows, skylights, shutters, panels, party wall, supports, etc. . . . , which are some of the possible applications, however they do not cover all the possible uses.

BRIEF DESCRIPTION OF DRAWINGS

Explanations of the figures:

FIGS. 1, 2, 3 and 4—sections of the wood board with two or more incisions;

FIG. 5—wood bar with continuous and parallel cuts;

FIG. 6—wood bar with discontinuous incisions belonging to the same plane;

FIG. 7—wood board with discontinuous incisions belonging to parallel planes;

FIG. 8—wood board with discontinuous incisions and belonging to inclined planes;

FIG. 9—example of assembled modular element;

FIG. 10—example of a frame.

Claims

1. The board of natural or composed wood (chipboard, MDF, plywood, oriented strand board, glued laminated timber, etc.... ) characterized by two or more incisions along the longitudinal direction, continuous and/or discontinuous, belonging to planes that are parallel and/or inclined to each other, where suitable materials are inserted.

2. The wood board according to claim 1 characterized in that the single incision lies on a plane that is parallel and/or inclined in relationship to the different surfaces of the bar.

3. The wood board according to claim 1 characterized in that the cut of a surface is long as the entire wood board or it is formed by several cracks of different length, width and height, belonging to the same plane and/or to several planes parallel to each other and/or to several planes inclined to each other.

4. The wood board according to claim 1 characterized in that the height of the cracks of the wood bar has equal or unequal thickness compared with the height of the cuts made on the same side and/or on different sides of the wood bar.

5. The wood board according to claim 1 characterized in that the width of the cracks of the wood bar has equal or unequal depth compared with the width of the cuts made on the same side and/or on different sides of the wood bar.

6. The wood board according to claim 1 characterized in that the insertion in the fissures of suitable acoustic insulating, soundproof or sound-blocking materials (metals, textiles, plastics, rubber, mineral wool, synthetic fibres, etc.... ) that improves further the final thermo-acoustic insulation.

7. The wood board according to claim 1 characterized in that her workability in order to obtain frames and other products, with the usual machines and tools existing in the timber industry.

8. The wood board according to claim 1 characterized in that the possible marketing both as a simple basic semi-finished product and as a worked finished element.

9. The wood board according to claim 1 characterized in that the use both as single component and as a modular component, performed matching the various elements to form a continuous wood panel.