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Acoustical board under subway seat

A technology for sound-absorbing panels and seats, which is applied in railway car bodies, railway car body parts, transportation and packaging, etc. Good effect, improve sound absorption effect, improve the effect of working life

Inactive Publication Date: 2018-03-20
JIANGSU PIVOT NEW DECORATIVE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the micro-perforated opening form of this micro-perforated sound-absorbing panel can only be applied to aluminum alloy or galvanized steel with a thickness of 0.8-1mm and a low hardness, which makes the micro-perforated sound-absorbing panel soft and cannot reach certain Due to the pressure resistance requirements of specific use environments, it is urgent to develop microporous sound-absorbing panels made of harder metal plates
However, the material of the hard metal plate is hard, and the service life of the mold is low when the needle punching process is used, and it needs to be replaced frequently, which cannot realize mass production

Method used

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  • Acoustical board under subway seat
  • Acoustical board under subway seat
  • Acoustical board under subway seat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] see Figure 4 , the shape of the depression 2 is a quadrilateral, that is, a rectangle. The quadrilateral includes two long sides and two short sides. At the two long sides of the rectangle, the front of the plate 1 to the front of the depression 2 is an arc transition, and the two short sides of the rectangle The blocking part 3 from the front of the plate 1 to the bottom surface of the depression 2 forms a facade, two micro-perforations 4 are formed on the lower side of the facade, and two micro-perforations 4 are formed corresponding to one depression 2, and the cross-sectional shape of the micro-perforation 4 is convex. Point to the semicircle on the back of the board. The plate 1 has a thickness of 0.7 mm, a length of the long side of 3 mm, and a length of 2 mm of the short side, the width of the micro-perforation 4 is 0.04 mm, and the height of the micro-perforation 4 is 0.02 mm. The perforation rate is 0.52%, the horizontal spacing a is 4mm, and the longitudinal...

Embodiment 2

[0041] see Figure 5 , the shape of the depression 2 is hexagonal, and the hexagon includes three long sides and three short sides. At the three long sides of the hexagon, the front of the plate 1 to the front of the depression 2 is an arc transition, and the three short sides of the hexagon The blocking part 3 from the front of the plate 1 to the bottom surface of the depression 2 forms a facade, three micro-perforations 4 are formed on the lower side of the facade, and three micro-perforations 4 are formed corresponding to one depression 2, and the cross-sectional shape of the micro-perforation 4 is a convex surface Point to the semicircle on the back of the board. The plate thickness is 0.7mm, the length of the long side is 6mm, the length of the short side is 2mm, the width of the micro-perforation 4 is 0.04mm, and the height of the micro-perforation 4 is 0.02mm. The perforation rate is 0.35%, the horizontal spacing a is 6mm, and the longitudinal spacing b is 9mm.

Embodiment 3

[0043] see Image 6 , the shape of the depression 2 is an octagon, and the octagon includes four long sides and four short sides. At the four long sides of the octagon, the front of the board plate 1 to the front of the depression 2 is an arc transition, and the four short sides of the octagon are The front of the plate 1 at the edge reaches the barrier part 3 of the bottom surface of the depression 2 to form a facade, four micro-perforations 4 are formed on the lower side of the facade, four micro-perforations 4 are formed corresponding to one depression 2, and the cross-sectional shape of the micro-perforation 4 is a convex surface Point to the semicircle on the back of the board. The plate 1 has a thickness of 0.7 mm, a length of the long side of 4 mm, a length of the short side of 2 mm, the width of the micro-perforation 4 is 0.04 mm, and the height of the micro-perforation 4 is 0.02 mm. The perforation rate is 0.25%, the horizontal spacing a is 12mm, and the longitudinal...

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Abstract

The invention relates to a sound-absorbing panel under a subway seat, which is characterized in that it is bent from a micro-perforated sound-absorbing panel, and the bent sound-absorbing panel under a subway seat includes a transverse section, a first The oblique section, the second oblique section, and the third oblique section, the unbent micro-perforated sound-absorbing panel includes a flat board body, and the front side of the board body (1) facing the back side is provided with uniformly arranged depressions (2) , the depression (2) is provided with micro-perforations (4) on multiple sides in the horizontal direction, the micro-perforations (4) also form the sound channel there, and the bottom of the depression (2) forms a blocking portion (3) . The sound-absorbing panel under the subway seat of the present invention has the advantages of no need to cooperate with sound-absorbing paper, good sound-absorbing effect, high hardness of the panel itself, applicable to occasions with special pressure resistance requirements, and capable of mass production.

Description

technical field [0001] The invention relates to a sound-absorbing panel under a subway seat. Background technique [0002] With the continuous improvement of people's quality of life and the increasing awareness of environmental protection, their requirements for the living environment are also gradually increasing. The problem of noise control has attracted the attention of governments and scientific and technological workers in various countries. Various sound-absorbing materials are widely used in noise control. The noise problem of the subway ride environment has also received attention from all parties. [0003] Control the perforation diameter of the common perforated plate to less than 1mm to form a micro-perforated plate. At this point, the micro-perforated panel itself already has sufficient acoustic resistance, and at the same time has a sufficiently low mass acoustic reactance to form a broadband sound absorber without adding any porous material. With the devel...

Claims

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Application Information

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IPC IPC(8): B61D17/18
CPCB61D17/185
Inventor 赵维
Owner JIANGSU PIVOT NEW DECORATIVE MATERIALS
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