KR20210100395A - Noise and vibration absorption panel and its manufacturing method - Google Patents

Abstract

The present invention relates to a sound absorption panel for reducing noise and vibration, which is attached to a vehicle or a building to promote noise and vibration reduction, and a manufacturing method thereof. According to the present invention, the sound absorption panel for reducing noise and vibration can be not only used for the interior of a vehicle, but also be applied to public facilities such as theaters, music rooms, auditoriums, general offices, residential houses, and the like to effectively absorb noise or vibration. Instead of existing synthetic resin materials or aluminum metal materials, eco-friendly pampas grass or reeds, which can be easily collected, is pulverized and used, thereby promoting lightweight of a material and reducing production cost. Moreover, when used in a vehicle, fire-resistant treatment is performed in the sound absorption panel, and thus generation of fire and toxic gas due to heating can be minimized. The method comprises a preparation step, a pulverization step, a mixing step, a press molding step, a drying step, a dipping step, a re-drying step, a lamination step, and a finishing step.

Description

Noise and vibration absorption panel and its manufacturing method

The present invention relates to a sound-absorbing panel that can be attached to a vehicle or a building to reduce noise or vibration, and a method for manufacturing the same.

In order to effectively respond to environmental problems such as global warming caused by air pollution around the world, efforts are being made to protect the environment by strengthening emission regulations such as carbon dioxide, fine dust, and automobile exhaust gas, led by OECD countries. This is also the case when manufacturing sound-absorbing panels used in buildings or automobiles. In general, sound-absorbing panels or sound-insulating panels used in automobiles or buildings are manufactured using polyester resin felt, PET felt, and perform. are doing In particular, in order to minimize vibration and friction noise according to the dynamic power unit and control heat generation in the driving unit, the durability and efficiency of automobiles need to be improved compared to sound-absorbing panels installed in static buildings. That is, as in the perforated sound-absorbing panel using the application number 10-2013-0006808 using the polyester compression board, the base plate of the fiber material using the polyester compression board; A polyester compression board that is laminated and attached to the upper surface of the base plate, and formed through a plurality of sound-absorbing holes in the thickness direction; and a decorative plate having a plurality of through-holes respectively corresponding to the sound-absorbing holes to be laminated and attached to the upper surface of the polyester compression board; In order to replace it with ashes, in the eco-friendly sound-absorbing panel using recycled materials in Application No. 10-2017-0163423, the pulp, which is an aggregate of cellulose fibers obtained through mechanical or chemical methods from wood or other fiber plants, is used to form interior walls or Provided is an eco-friendly sound-absorbing panel using a recycled material that can finish the ceiling, but in the case of the invention, the fire-resistance performance and NVH (noise, vibration and harshness) control efficiency in terms of the material or structure of the sound-absorbing panel was limited.

In order to improve this, the present invention is to provide a sound-absorbing panel for reducing noise and vibration and a method for manufacturing the same by manufacturing by combining a fireproof laminated intermediate part between carbon fiber panels and applying it to a building or vehicle.

The present invention relates to a sound-absorbing panel and a method for manufacturing the same, and to provide a sound-absorbing panel capable of reducing noise and vibration and a method for manufacturing the same.

In order to solve the above problem,

The present invention includes a preparation step (S1) of collecting at least one of reeds or silver grass;

A grinding step (S2) of cutting and pulverizing the reed or silver grass collected in the preparation step (S1) to produce a pulverized product;

a mixing step (S3) of mixing the pulverized product produced in the pulverization step (S2) with a binder to prepare a mixture;

Compression molding step (S4) of producing a compression molded product to be manufactured by compressing and molding the mixture prepared in the mixing step (S3);

a drying step (S5) of drying the compression molding produced in the compression molding step (S4) to produce a dry layer;

a dipping step (S6) of dipping the dried layer produced in the drying step (S5) into a refractory material or dye to produce a refractory layer;

a re-drying step (S7) of drying the refractory layer produced in the dipping step (S6) to produce a re-drying layer;

a lamination step (S8) of stacking the re-drying layers produced in the re-drying step (S7) with each other to produce an intermediate lamination part;

to the completion step (S9) of manufacturing the finished product 100 by combining the carbon fiber panels on the upper and lower surfaces of the middle part of the lamination produced in the lamination step (S8); It is solved by providing a method for manufacturing a sound-absorbing panel that is configured.

In addition, the present invention is a stacked intermediate portion; a carbon fiber panel joined to the upper and lower ends of the middle part of the lamination; It is solved by providing a sound-absorbing panel that is configured.

The present invention relates to a sound-absorbing panel manufactured using reeds or silver grass and a method for manufacturing the same, and is not only used in automobile interiors, but also applied to public facilities such as theaters, music rooms, auditoriums, etc., general offices or residential houses. This makes it possible to effectively absorb noise or vibration, and instead of the existing synthetic resin material or aluminum metal material, by crushing and using an eco-friendly pampas grass or reed that can be easily collected, the weight of the material was reduced and the production cost was reduced, Moreover, when used in automobiles, there is an advantage in that it is fire-resistant, so that it is possible to minimize the generation of fire and toxic gas due to heating.

In addition, in the present invention, when the pulverized material is compressed or the re-drying layer is laminated, an interspace portion is formed to achieve effective sound absorption, thereby minimizing resonance that may occur in a residential space or a vehicle interior. It has the effect of dramatically reducing road friction and wind noise.

1 is a flowchart for a method for manufacturing a sound-absorbing panel.
Figure 2 is a schematic diagram for the configuration of the sound-absorbing panel.
Figure 3 is a real photograph of the middle part of the stacking of the sound-absorbing panel.
4 is an exemplary view in which the sound-absorbing panel is applied to a vehicle.

Hereinafter, it will be described in more detail with reference to the accompanying drawings.

Prior to this, terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention, and do not represent all of the technical spirit of the present invention, so at the time of the present application, they can be replaced It should be understood that various equivalents and modifications may be made.

The present invention relates to a method for manufacturing a sound-absorbing panel,

Broadly, the preparation step (S1) and; grinding step (S2) and; a mixing step (S3); Compression molding step (S4) and; drying step (S5) and; a dipping step (S6); Re-drying step (S7) and; Lamination step (S8) and; to the completion step (S9); It relates to a method for manufacturing a sound-absorbing panel comprising.

in more detail

A preparation step (S1) of collecting at least one of reeds or silver grass;

A grinding step (S2) of cutting and pulverizing the reeds or silver grass collected in the preparation step (S1) to a length of 250 to 350 mm and a diameter of 0.5 to 2 mm to produce a pulverized product (S2);

a mixing step (S3) of mixing the pulverized product produced in the pulverization step (S2) with 0.1 to 0.3 kg of binder per 1 m3 to prepare a mixture;

A compression molding step (S4) of producing a compression molded product having a thickness of 1 to 3 mm by compressing and molding the mixture prepared in the mixing step (S3);

a drying step (S5) of drying the compression molded product produced in the compression molding step (S4) at room temperature for 40 to 50 hours to produce a dry layer;

a dipping step (S6) of dipping the dried layer prepared in the drying step (S5) into a refractory material or dye for 10 to 30 seconds to produce a refractory layer;

a re-drying step (S7) of drying the refractory layer produced in the dipping step (S6) at room temperature for 40-50 hours to produce a re-dried layer;

a lamination step (S8) of stacking 5 to 20 re-drying layers (10a) produced in the re-drying step (S7) to each other to produce a 10-30 mm-thick stacked middle part;

to the completion step (S9) of manufacturing a finished product by bonding the carbon fiber panel 20 so as to seal the upper and lower surfaces of the intermediate layer 10 manufactured in the lamination step (S8); It is solved by providing a method for manufacturing a sound-absorbing panel that is configured.

In addition, the present invention is a stacked intermediate portion; a carbon fiber panel joined to the upper and lower ends of the middle part of the lamination; It is made up of sound-absorbing panels.

As an example

In the present invention, after producing a pulverized product by pulverizing silver grass or reed in the pulverizing step (S1) and mixing it with a binder in the mixing step (S3) to prepare a mixture, in the compression molding step (S4), a thickness of 1 to 3 mm It is possible to produce a compression molded product with an average density of 0.7 to 0.9 kg/㎥ by compression with Can be immersed in a refractory treatment or color treatment, and the re-dried layer produced by re-drying the color-treated or fire-resistant fire-resistant layer is laminated to a thickness of 10 to 30 mm in the lamination step (S8) to form an intermediate layer of lamination In addition, by bonding carbon fiber panels to the upper and lower surfaces of the middle part of the lamination, a finished product can be manufactured.

In addition, the present invention can be applied to the interior of a building or automobile, in particular, it can be used for wheel fenders or indoor ceilings of automobiles, and as shown in FIG. do.

In addition, when the sound-absorbing panel of the present invention is applied to a vehicle, as shown below, the internal noise is significantly reduced.

As described above, the present invention has been described with specific matters such as specific components and limited embodiments and drawings, but these are provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments, Various modifications and variations are possible from these descriptions by those of ordinary skill in the art to which the present invention pertains.

Accordingly, the spirit of the present invention should not be limited to the described embodiments, and not only the claims to be described later, but also all those with equivalent or equivalent modifications to the claims will fall within the scope of the present invention.

10. Lamination middle part
10a. rebuild layer
20. Carbon Fiber Panel

Claims (5)

In the sound-absorbing panel manufacturing method,
A preparation step (S1) of collecting one or more of reeds or silver grass;
A grinding step (S2) of cutting and pulverizing the reed or silver grass collected in the preparation step (S1) to produce a pulverized product;
a mixing step (S3) of mixing the pulverized product produced in the pulverization step (S2) with a binder to prepare a mixture;
Compression molding step (S4) of compressing and molding the mixture prepared in the mixing step (S3), compressing it to a thickness of 1 to 3 mm, and producing a compression molded article having an average density of 0.7 to 0.9 kg/m3;
A drying step (S5) of drying the compression molding produced in the compression molding step (S4) to produce a dry layer;
a dipping step (S6) of dipping the dried layer produced in the drying step (S5) into a refractory material to produce a refractory layer;
a re-drying step (S7) of drying the refractory layer produced in the dipping step (S6) to produce a re-drying layer (10a);
a lamination step (S8) of stacking the re-drying layers produced in the re-drying step (S7) with each other to produce the lamination intermediate portion 10;
to the completion step (S9) of manufacturing a finished product by combining the carbon fiber panels 20 so as to seal the upper and lower surfaces of the middle part of the lamination produced in the lamination step (S8); A method of manufacturing a sound-absorbing panel, characterized in that it is configured.
The method of claim 1,
In the dipping step (S6), the sound-absorbing panel manufacturing method, characterized in that by dipping the dry layer to the dye, color processing can be performed.

The method of claim 1,
In the drying step (S5) or the re-drying step (S7), the sound-absorbing panel manufacturing method, characterized in that the drying layer or the re-drying layer is dried at 40 to 50 degrees at room temperature, respectively.
A sound-absorbing panel, characterized in that produced by the method of any one of claims 1 to 3.
In the sound-absorbing panel,
After pulverizing pampas grass or reeds, a laminated middle part composed of a plurality of re-dried layers manufactured through mixing, compression molding and drying or re-drying; a carbon fiber panel joined to the upper and lower surfaces of the middle part of the lamination; It is composed of a sound-absorbing panel characterized in that it is coupled to and attached to a building or vehicle.

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