KR20190142044A - Engine room separation wall for a vehicle with improved sound insulation and reduced weight - Google Patents

Abstract

Disclosed in the present invention is an engine room separation wall for a vehicle with an excellent sound insulation performance and a reduced weight. More specifically, the engine room separation wall for a vehicle comprises a base layer; adhesion layers formed on an upper side and a lower side of the base layer; a surface layer formed on one side of the base layer with the adhesion layer; and a metal layer formed on the other side of the base layer with the adhesion layer. The engine room separation wall for a vehicle having the above structure not only has an excellent sound insulation performance to reduce indoor noises, but also reduces a weight thereof to improve fuel efficiency.

Description

Engine room bulkhead with excellent sound insulation and improved weight {ENGINE ROOM SEPARATION WALL FOR A VEHICLE WITH IMPROVED SOUND INSULATION AND REDUCED WEIGHT}

The present disclosure relates to a vehicle engine compartment bulkhead having excellent sound insulation performance and improved weight, and more particularly, is interposed between the engine compartment and a dashboard of the vehicle to not only reduce indoor noise of the vehicle but also improve the weight of the vehicle. The present invention relates to a vehicle engine room bulkhead having excellent sound insulation and improved weight, which has an effect of improving fuel efficiency.

The vehicle engine compartment bulkhead effectively distributes the impact force from the collision of the vehicle to the panel connected through the barrier member to prevent the components (eg, battery, brake booster, engine, transmission, etc.) installed in the engine compartment from entering the vehicle's interior. In addition to the prevention, it serves to block the vibration or noise generated from the parts (particularly the engine and the transmission) from being transmitted to the vehicle interior through the dashboard.

The prior art related to the engine room partition wall is disclosed in Korean Patent Registration No. 10-0534428 "Bulkhead structure of the engine room", the partition member described in the prior art is bonded to the wheel apron panel at the front and lower ends A first joining part is formed, and a second joining part is joined to the rear lower panel at the rear part, and a third joining part is joined to the front cowl panel at the upper end part of the rear part and installed in the engine room of the vehicle.

The partition member described in the prior art is composed of a double partition structure by connecting the wheel apron panel, the dash lower panel and the front cowl panel separately from each other, so that parts such as batteries, brake boosters, engines and transmissions installed in the engine room It prevents the intrusion into the room from the collision of the vehicle, as well as the effect of preventing the inflow of noise indoors.

However, a conventional vehicle engine room partition wall is manufactured by injecting a synthetic resin, the sound insulation performance is reduced compared to the general vehicle interior materials, and the weight is too heavy, there was a problem of lowering the fuel economy of the vehicle.

Disclosed content is interposed between the engine room and the dashboard of the vehicle to not only reduce the indoor noise of the vehicle, but also to improve the fuel efficiency of the vehicle by improving the weight of the vehicle engine compartment partition having excellent sound insulation performance and weight To provide.

The disclosed contents include a substrate layer, an adhesive layer formed on upper and lower surfaces of the substrate layer, a surface layer formed on one surface of the substrate layer on which the adhesive layer is formed, and a metal layer formed on the other surface of the substrate layer on which the adhesive layer is formed. Excellent sound insulation performance, characterized in that made with respect to the vehicle engine room bulkhead is improved weight.

Preferably, the substrate layer is 2400 to 2800g / m ² made of resin felt, having a surface density or of 1000 to the area density of 2000g / m ² on the upper and lower surfaces of the resin felt having an area density of 200 to a 800g / m ² It can be made by laminating a fiber mixture having a.

More preferably, the resin felt may be made of one selected from the group consisting of thermosetting polyester, epoxy and phenol.

More preferably, the fiber mixture may be made by mixing polyamide and glass fibers in an amount of 1: 0.5 to 1.5 parts by weight.

Even more preferably, the pressure-sensitive adhesive layer may be made of 45 to 55 g / m ² of a thermosetting adhesive, or may be made of a hot melt film having a thickness of 25 to 35 μm.

Even more preferably, the surface layer may be composed of aramid fibers having a surface density of 140 to 160 g / m ² .

Even more preferably, the metal layer may be made of aluminum having a thickness of 150 to 250㎛.

As described above, the vehicle engine room bulkhead having excellent sound insulation performance and improved weight is interposed between the engine room and the dashboard of the vehicle to not only reduce the noise of the vehicle, but also to improve the fuel efficiency of the vehicle by improving the weight. Effect.

1 is a partial cross-sectional view showing a cross section of a vehicle engine compartment partition having excellent sound insulation performance and improved weight manufactured through Example 1 disclosed.
Figure 2 is a partial cross-sectional view showing the cross section of the vehicle engine compartment partition is improved weight if the sound insulation performance is excellent through the disclosed Example 3.
3 is a photograph showing the omnibus speaker installed in the reverberation chamber measuring the sound insulation performance of the engine room partition wall having excellent sound insulation performance and improved weight.
Figure 4 is a schematic diagram showing a microphone (B & K Rotation Mic) is installed in the source room for measuring the sound insulation performance of the engine compartment partition wall having excellent sound insulation performance and improved weight.
FIG. 5 is a graph showing a db of a micro-measured sound source installed in a source room for measuring sound insulation performance of a vehicle engine room partition wall having excellent sound insulation performance and improved weight.
6 is applied to the partition along with the hood, the dash outer, tunnel outer, cowl top cover and weather strip so that the sound insulation performance of the vehicle engine room partition wall having excellent sound insulation performance and improved weight is implemented under the same conditions as the actual vehicle. Figures show foamed foam, panel seal, through-hole lead seal, other sealers and grommet applied.
FIG. 7 is a photograph showing a measurement room in which the sound insulation performance of the vehicle engine room partition wall having excellent sound insulation performance and improved weight is measured.

In the following, preferred embodiments of the present invention and the physical properties of each component will be described in detail, which is intended to explain in detail enough to be able to easily carry out the invention by one of ordinary skill in the art, This does not mean that the technical spirit and scope of the present invention is limited.

The vehicle engine room partition wall having excellent sound insulation performance and improved weight has a base layer 10, an adhesive layer 20 formed on upper and lower surfaces of the base layer 10, and the adhesive layer 20 formed thereon. The surface layer 30 formed on one surface of the substrate layer 10 and the metal layer 40 formed on the other surface of the substrate layer 10 on which the adhesive layer 20 is formed.

The base layer 10 is a layer that serves as a base material of the vehicle engine room partition wall having excellent sound insulation performance and improved weight, and is made of resin felt having a surface density of 2400 to 2800 g / m ² , or 1000 to 2000 g / m ² . It is preferable that the fiber mixture 20 having a surface density of 200 to 800 g / m ² is laminated on the upper and lower surfaces of the resin felt 11 having a surface density.

The base layer 10 made of the above material has excellent sound insulation performance and improves the sound insulation performance of the vehicle engine room partition wall with improved weight, and also improves mechanical properties while reducing the weight of the vehicle engine room, It plays a role of showing excellent sound insulation performance against noise with frequency.

At this time, the resin felt 11 is made of one selected from the group consisting of thermosetting polyester, epoxy and phenol, the fiber mixture 12 is that the polyamide and glass fibers are mixed by 1: 0.5 to 1.5 parts by weight It is preferable to use, since the polyamide serves as a binder for binding the resin felt 11 and the fiber mixture 12, since the glass fiber serves to improve the heat resistance of the base layer 10 In addition, the substrate layer 10 having improved heat resistance as well as sound insulation performance can be provided.

The adhesive layer 20 is formed on the upper and lower surfaces of the substrate layer 10, and is formed by coating a thermosetting adhesive, or made of a hot melt film, the substrate layer 10 and the surface layer 30 To bind.

When the adhesive layer 20 is formed of a thermosetting adhesive, the thermosetting adhesive is preferably coated in an amount of 45 to 55 g / m ^{2. When} the thermosetting adhesive is coated to less than 45 g / m ² , the base layer may be formed by external force or the like. 10 and the surface layer 30 may be peeled off, and if the thermosetting adhesive is coated in excess of 55g / m ² , the above effect is not greatly improved and the manufacturing cost is increased, It is not preferable because it increases thickness and weight excessively.

In this case, the thermosetting adhesive is not particularly limited as long as it exhibits properties that are cured upon heating, but any one may be used, but is preferably made of an epoxy adhesive.

In addition, when the adhesive layer 20 is formed of a hot melt film, it is preferable to use a polyethylene hot melt film having a thickness of 25 to 35 μm. When the adhesive layer 20 is formed of a hot melt film, the base layer 10 ) And the surface layer 30 can be combined, and the sound insulation performance of the disclosed engine compartment partition wall can be further improved.

In this case, when the thickness of the hot melt film is less than 25 ㎛ may occur a phenomenon that the base layer 10 and the surface layer 30 is peeled off by an external force, when the thickness of the hot melt film exceeds 35 ㎛ It is not windy because the thickness and weight of the engine room bulkhead are excessively increased without significantly improving the effect.

The surface layer 30 is formed on one surface of the substrate layer 10 on which the adhesive layer 20 is formed, and preferably made of aramid fibers having a surface density of 140 to 160 g / m ² .

The surface layer 30 composed of the above-described surface density and components not only blocks noise generated in the engine room of the vehicle, but also exhibits excellent heat resistance and durability, and thus serves to improve sound insulation, heat resistance and durability of the engine compartment partition wall. .

If the surface density of the surface layer 30 is less than 140g / m ² , the above effect is insignificant, and if the surface density of the surface layer 30 exceeds 160g / m ² , the above effect is not greatly improved, but It is not preferable because the thickness and weight increase excessively.

The metal layer 40 is formed on the other surface of the base layer 10 on which the adhesive layer 20 is formed, and is made of aluminum having a thickness of 150 to 250 μm. The metal layer 40 made of aluminum exhibiting the thickness is Excellent sound insulation performance and serves to significantly improve the sound insulation performance of the engine room partition wall weight improved.

If the thickness of the metal layer 40 is less than 150㎛, the above effect is insignificant, and if the thickness of the metal layer 40 exceeds 250㎛, the weight and thickness of the vehicle engine room partition wall without significantly improving the effect Is not preferable because is excessively increased.

Hereinafter, a method of manufacturing a vehicle engine room partition wall having excellent sound insulation performance and improved weight, and the physical properties of the vehicle engine room partition wall manufactured through the manufacturing method will be described with reference to embodiments.

<Example 1>

A substrate layer is formed of a resin felt (thermosetting polyester) having a surface density of 2400 g / m ² and a thickness of 24 mm, and a gravure coating of a thermosetting adhesive (epoxy) is applied at 50 g / m ² on the upper and lower surfaces of the substrate layer. Forming a layer, and forming a surface layer of aramid fibers having a surface density of 150 g / m ² and a thickness of 2 millimeters on one surface of the substrate layer on which the adhesive layer was formed, and 200 on the other surface of the substrate layer on which the adhesive layer was formed. A laminate was prepared by forming a metal layer made of aluminum with a thickness of μm, and the prepared laminate was put into a compression mold heated to a mold surface temperature of 230 ° C. and hot formed for 110 seconds at a pressure of 100 tons, followed by a pressure of 100 tons. Cold forming was performed for 50 seconds to produce a vehicle engine room partition wall having a thickness of 4 millimeters.

<Example 2>

Proceed in the same manner as in Example 1, using a resin felt having a surface density of 2800g / m ² to prepare a vehicle engine room partition wall thickness of 4.4 millimeters.

<Example 3>

Example 1 but performed in the same manner, the fiber mixture with a surface density with 7 mm thickness of the upper and lower surfaces of the surface density and a 12 mm thick resin felt of 1300g / m ² (thermoplastic polyester) 800g / m ² ( A vehicle engine room partition wall having a thickness of 4 millimeters was prepared by applying a base layer formed by laminating polyamide and glass fibers in a 1: 1 weight part).

<Example 4>

Proceed in the same manner as in Example 1, the fiber mixture having a surface density of 1600g / m ² and a surface density of 800g / m ^{2 and} a 7mm thickness on the upper and lower surfaces of the resin felt (thermosetting polyester) of 12 mm thick ( A vehicle engine room partition wall having a thickness of 4 millimeters was prepared by applying a base layer formed by laminating polyamide and glass fibers in a 1: 1 weight part).

Example 5

Proceed in the same manner as in Example 1, a pressure-sensitive adhesive layer was formed of a polyester hot melt film of 30㎛ thickness to manufacture a vehicle engine room partition wall having a thickness of 4 millimeters.

Comparative Example 1

An injection chamber was formed by mixing 70 parts by weight of polyamide and 30 parts by weight of glass fiber to 100 parts by weight of barium sulfate to form an engine room partition having the same shape as that of the engine room partition wall manufactured in Example 1 and having a thickness of 3 millimeters. Prepared.

The weight of the engine room partition wall manufactured through Examples 1 to 5 and Comparative Example 1 is shown in Table 1 below.

TABLE 1

As shown in Table 1 above, it can be seen that the engine room partition wall manufactured through the disclosed Examples 1 to 5 is significantly reduced in weight compared to the engine room partition wall manufactured through Comparative Example 1.

In addition, it is shown in Table 2 below by measuring the sound insulation rate of the engine room partition wall is excellent in the sound insulation performance and the weight is improved through the Examples 1 to 5 and Comparative Example 1.

{However, the sound insulation rate was measured by using an engine room and a reverberation chamber.

One omnibus speaker was installed as shown in FIG. 2 below, and five microphones (B & K Rotation Mic) were installed as shown in FIG. 3 below to measure the sound source of the source room.

In addition, as shown in Figure 4 below, as a result of measuring the sound source of the five microphones installed during the speaker operation was confirmed that the 110db.

Implementing conditions of the engine room are as shown in Figure 5 below to implement the same conditions as the actual vehicle, the partitions manufactured in Examples 1 to 2 and Comparative Example 1 the hood, the dash outer, tunnel outer, cowl top cover and weather strip And foamed members, panel seal, through-hole lead seal, and other sealers and grommet.

The measurement of the sound insulation rate was made in the measurement room as shown in FIG. 6 below, and all panel sealers were applied and finished except for DHPE Dash (panel sealing, through hole lead sealing, other sealers and grommet applications, and sound absorbing materials). Measured later.}

TABLE 2

As shown in Table 2 above, it can be seen that the vehicle engine compartment bulkhead manufactured through the disclosed Examples 1 to 5 exhibits a similar sound insulation rate in all frequency bands with the engine compartment bulkhead manufactured through Comparative Example 1.

Therefore, the disclosed vehicle engine room partition wall having excellent sound insulation performance and improved weight may not only reduce indoor noise of the vehicle due to excellent sound insulation performance, but also improve weight and improve fuel efficiency of the vehicle.

10; Substrate layer
11; Resin felt
12; Fiber blend
20; Adhesive layer
30; Surface layer
40; Metal layer

Claims (7)

Base layer;
An adhesive layer formed on upper and lower surfaces of the base layer;
A surface layer formed on one surface of the base layer on which the adhesive layer is formed; And
A vehicle engine room partition wall having excellent sound insulation performance and improved weight, comprising: a metal layer formed on the other surface of the base layer on which the adhesive layer is formed.
The method according to claim 1,
The base layer fiber mixture having a 2400 to the resin felt made or, from 1000 to the upper and lower surfaces of the resin felt having an area density of 2000g / m ² 200 to surface density of 800g / m ² having a surface density of 2800g / m ² The vehicle engine room partition wall is excellent in sound insulation performance, characterized in that is made by stacking the weight.
The method according to claim 2,
The resin felt is a vehicle engine room partition wall having excellent sound insulation and improved weight, characterized in that made of one selected from the group consisting of thermosetting polyester, epoxy and phenol.
The method according to claim 2,
The fiber mixture is a vehicle engine room partition wall having excellent sound insulation and improved weight, characterized in that the polyamide and glass fibers are mixed in a weight portion of 1: 0.5 to 1.5.
The method according to claim 1,
The pressure-sensitive adhesive layer is made by coating the thermosetting pressure-sensitive adhesive 45 to 55g / m ² , or 25 to 35㎛ thickness of the vehicle engine room partition wall is excellent sound insulation performance, characterized in that made of a hot melt film.
The method according to claim 1,
The surface layer is a vehicle engine room partition wall having excellent sound insulation and improved weight, characterized in that made of aramid fibers having a surface density of 140 to 160g / m ² .
The method according to claim 1,
The metal layer is a vehicle engine room partition wall having excellent sound insulating performance, characterized in that made of aluminum having a thickness of 150 to 250㎛.

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