JPS61250325A - Heat-insulating sound absorbing material - Google Patents

Abstract

PURPOSE:To aim at improvement in heat-insulatability, sound-absorbability and strength, by installing a filmlike reinforced layer, made up of sticking a lot of metallic grains solidly and at intervals among them, in at least one surface of a molding body consisting of a matlike fiber body. CONSTITUTION:A molding body 1 is made up of applying a roller process to a lot of inorganic or organic fibers, forming a matlike fiber body there, and of forming this fiber body into such a form as being suitable for the application spot. And, a reinforced layer 2 is installed in one side of this molding body 1, and this reinforced layer 2 is formed into a filmlike form in a way of bonding adjacent metallic grains themselves solidly and having them stuck fast in the state that intervals are formed among a lot of these metallic grains. According to this method, the molding body 1 is formed with a lot of fibers and there is a large space between each of mutual fibers, so that very excellent heat- insulatability and sound-absorbability are securable and, what is more, strength on a surface of the molding body 1 is improvable.

Description

[Detailed description of the invention] The present invention aims to solve the following problems.

(Industrial Application Field) This invention relates to a heat-insulating sound-absorbing material used to surround a high-temperature and noisy object and block the heat emitted from it or absorb sound.

(Prior Art) As this type of heat-insulating and sound-absorbing material, a heat-insulating and sound-absorbing material formed by forming wool-like glass fibers into a desired shape is known.
Although it has high heat insulation and sound absorption properties, it has a weak mechanical strength and is easily damaged during use.

(Problems to be Solved by the Invention) This invention eliminates the above-mentioned conventional problems and provides a heat-insulating and sound-absorbing product that has high heat insulation and sound absorption properties, and has a high surface strength to prevent damage during use. The aim is to provide materials.

The configuration of the present invention is as follows.

(Means for Solving the Problems) The present invention takes the measures as described in the claims above, and its effects are as follows.

(Function) A molded body made of fibrous material has high heat insulation properties (and high sound absorption properties).Furthermore, the reinforcing layer attached to the surface of the molded body prevents damage to the surface of the molded body.

(Example) Below, drawings showing examples of the present application will be described. In FIGS. 1 and 2, 1 indicates a molded body.

This molded body is made of a large number of inorganic fibers such as glass fibers and ceramic fibers, and organic fabrics such as polyester, which are processed by roller processing, needling, etc. to form a cloak-like fibrous body, and the fibrous body is placed at the place of use. It is molded into a suitable shape. The above-mentioned forming is carried out by impregnating the surface layer or all layers of the above-mentioned mantle-like fibrous body with a well-known heat-resistant organic or inorganic binder, press-forming it, and heating it if necessary. . Reference numeral 2 denotes a reinforcing layer provided on one surface of the molded body 1, in which a large number of metal particles are bonded together by a well-known metal spraying method, and adjacent metal particles are integrally bonded to each other, with gaps being formed between the large number of metal particles. It is formed into a thin film by adhering it to the surface. The metals used include chromium, titanium, nickel, aluminum, copper, and other metals, and the state of adhesion thereof is similar to that of sintered metals. The reinforcing layer 2 is provided on the side of the molded body 1 that is more likely to receive damage, but it may be provided on both sides including the opposite side.

In the structure described above, since the molded body 1 is formed of a large number of fibers and there are large spaces between the fibers, it exhibits very high heat insulation and sound absorption properties, and one side of the molded body 1 Or, since the reinforcing layer 2 is provided on both sides, even if a force that causes trauma is applied to the surface provided with the reinforcing layer 2, the reinforcing layer 2 and the molded body 1 are prevented from being damaged by the force. . Even if the reinforcing layer 2 as described above is provided, since many gaps are formed between the many metal particles constituting the reinforcing layer 2, the above-mentioned heat insulating properties and sound absorbing properties are hardly impaired.

Next, FIG. 3 shows an example in which the above-mentioned heat-insulating and sound-absorbing material is used in an automobile muffler. In the figure, 3 is a case, 4 is a front exhaust pipe, 5 is a rear exhaust pipe, 6 is a partition wall, 7 is a communication pipe, and 8.9 is the above-mentioned heat-insulating and sound-absorbing material. This heat-insulating and sound-absorbing material 8.9 is provided with the above-mentioned reinforcing layer on its inner surface or on its inner and outer surfaces.

In such a case, from the front exhaust pipe 4 to the case 3
At the same time, the heat-insulating and sound-absorbing materials 8 and 9 exhibit great sound-absorbing properties against the high-temperature, high-pressure exhaust gas flowing into the interior, and at the same time, the inner surfaces of the heat-insulating and sound-absorbing materials 8 and 9 are prevented from being gouged by the high-temperature, high-pressure exhaust gas. things will be prevented.

Next, FIG. 4 shows an example in which the heat-insulating sound-absorbing material is used as a cover for an exhaust manifold of an engine. In FIG. Show. This manifold cover 12 is provided with the reinforcing layer on its outer surface. For things like this,
Even if pebbles thrown up by tires collide with the manifold cover 12 while the automobile is running, the manifold cover 12 is prevented from being damaged by the pebbles.

(Effects of the Invention) As described above, in the present invention, the molded body 1 is formed by molding a cloak-like fibrous body, so it has extremely high heat insulation and sound absorption properties. .

Moreover, a large number of metal particles are attached to one or both surfaces of the molded body 1 by thermal spraying in such a manner that adjacent metal particles are bonded together and gaps are formed between the large number of metal particles. Since the reinforcing layer 2 is formed in the form of a thin film, the strength of the surface of the molded body 1 is enhanced without greatly impeding the heat insulation and sound absorption properties of the molded body 1. This means that when this heat-insulating and sound-absorbing material is used in a muffler, the high temperature from the engine,
It has the effect of suppressing damage to the molded product caused by the gas while maintaining good sound absorption and heat insulation properties against high-pressure exhaust gas, and even when this heat-insulating and sound-absorbing material is used for the cover of the exhaust manifold, the above-mentioned Similarly, while maintaining good sound absorption and heat insulation properties, the cover can be effectively prevented from being damaged by pebbles flying around when the car is running.

[Brief explanation of drawings]

The drawings show examples of the present application, and FIG. 1 is a partially cutaway perspective view of the heat-insulating sound-absorbing material, FIG. 2 is an enlarged sectional view of the heat-insulating sound-absorbing material,
Figure 3 is a vertical sectional view showing the usage state of the muffler, Figure 4
The figure is an exploded perspective view showing how the exhaust manifold is used. 1... Molded body, 2... Reinforcement layer. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A large number of metal particles are applied to one or both sides of a molded product formed by molding a mat-like fibrous body by thermal spraying, with adjacent metal particles being integrally bonded to each other and gaps being left between the large number of metal particles. A heat insulating and sound absorbing material characterized by comprising a thin film-like reinforcing layer formed by adhering to the formed state.