ACOUSTIC SCREEN PANEL EXECUTION METHOD AND THE ACOUSTIC SCREEN PANEL

Abstract: The acoustic screen panel in the form of a block of the insulating material fixed in a metal frame with a covering lattice, characteristic of the fact that the stone wool block (<u>1</u>) has a core (<u>2</u>) approximately equal to (0,4-0,8) of the block thickness and lower density, as well as two covering layers (<u>3</u>) of approximate equal thickness but higher density. The block (<u>1</u>) is covered on both sides with a mesh (<u>4</u>) of circa 1 mm in diameter, advisably polyurethane as well as with a mesh (<u>5</u>) of circa few millimeters in diameter, advisably polyurethane.

Description: Acoustic screen panel execution method and the acoustic screen panel The subject of the presented invention is the acoustic screen panel execution method and the acoustic screen panel executed using this method, applicable to acoustic cover constructions assembly, built along communication routes with high level of noise. In common solutions, the panel consists of a uniform homogeneous material, mostly of a mineral wool, module shaped and fixed in stiff frames with lattice, which is mounted on a cantilever construction. The uniform panel material has quite a low acoustic insulation and is not durable for the sake of dampness, accumulation of deposits and impurities, physical interference of insects and birds as well as it proves its low stiffness, requiring the use of stiff frames and lattices. The hereby presented solution eliminates disadvantages and inconveniences specified above. The essence of the invention, which is the acoustic screen panel execution method through shaping an insulating material block and fixing it in a frame equipped with covering lattice, lies in the fact that module shaped block of stone wool (density of 150kG/m ) superficially thickens on both sides (for circa 0,10-0,30) of block thickness until a higher density (of circa 10-30 %) than the initial density is reached. Then, a covering mesh is mounted on both sides. It is advisable to perform the thickening by pressing. The acoustic screen panel executed in accordance with the invention is characteristic of the fact that the insulating material block in the form of the stone wool has a core approximately equal to (0,4-0,8) of the block thickness and two covering layers of approximate equal thickness but higher density. The block is covered on both sides with a mesh of circa 1 mm in diameter, advisably polyurethane as well as with a mesh of circa few millimeters in diameter. Having applied the panel, the following technical and utilitarian results were obtained: 1. multiple acoustic insulation increase, owing to the use of the wave damping effect during penetration through different density centers and elimination of small empty spaces between wool fibers; 2. increase of the element stiffness and stability, allowing to consider the panel as a self-caring element, for mounting on cantilever construction; 3. panel durability increase, trough decreasing to minimum the panel dampness owing to the use of the water surface tension effect on the internal mesh; through pollen-proof protection, deposit accumulation protection, protection for physical interference of insects and birds, all of which is protected by both polyurethane meshes as well as layer stratification protection; 4. low production costs; 5. workmanship simplicity. The subject of the invention is presented in example executions below, on the drawing in turn, shows the panel in an example execution in cross section in plane perpendicular to its main surface. Example I Shaped block 1 of stone wool, density of 150 kG/m and thickness of circa 230 mm is pressed on both sides for about 40 mm deep, until the wool density of circa 180 kG/m is reached, and then, a covering mesh 4 and 5 is mounted on both sides and finally fixed in a frame 6 with lattice 7. Example II Shaped block 1 of stone wool, density of 140 kG/m and thickness of circa 200 mm is pressed on both sides for about 20 mm deep, until the wool density of 160 kG/m is reached, and then, a covering mesh 4 and 5 is mounted on both sides and finally fixed in a frame 6 with lattice 7. The panel executed in the way presented in examples above is a stone wool block i with a core 2 approximately (0,4-0,8) the thickness of the block I and a lower density as well as two covering layers 3 of approximate equal thickness but higher density. The block I is covered on both sides with a polyurethane mesh 4 of circa 1 mm in diameter. Over this mesh there is another polyurethane mesh 5 of circa 3 mm in diameter. The block I with meshes 4 and 5 is placed in a common frame 6 with lattice 7 and fixed to the screen construction elements, not shown on the enclosed figure.

Claims: Patent claims The acoustic screen panel execution method through shaping an insulating material block (!) and fixing it in a frame equipped with covering lattice, lies in the fact that module shaped block of stone wool (density of 150kG/m ) superficially thickens on both sides (for circa 0,10- 0,30) of block thickness until a higher density (of circa 10-30 %) than the initial density is reached and then, a covering meshes (4) and (5) are mounted on both sides. The method according to reservation no.l characteristic of the fact that the thickening is done by pressing. The acoustic screen panel in the form of a block of the insulating material fixed in a metal frame with a covering lattice, characteristic of the fact that the stone wool block (1) has a core (2) approximately equal to (0,4- 0,8) of the block thickness and lower density, as well as two covering layers (3) of approximate equal thickness but higher density and the block (I) is covered on both sides with a mesh (4) of circa 1 mm in diameter, advisably polyurethane as well as with a mesh (5) of circa few millimeters in diameter, advisably polyurethane.

Inventors: GRZELSKI MACIEJ, GRZELSKI, MACIEJ
Applicants: GRZELSKI MACIEJ, GRZELSKI, MACIEJ
Application year: 2000
Main classification: E01F8
IPC codes: E01F8