JP2960640B2 - Damping metal plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an invention for preventing noise by preventing vibration of a metal plate and for obtaining nonflammable adhesiveness and corrosion resistance. Fields include members such as covers for various industrial machines, roofs, walls,
There are many fields of use for building materials such as floors, stairs, shutters, and shutters, various members for ships and vehicles, and cases for light electricity related cases.

[Problems to be solved by the invention]

Conventionally, metal plates have been used in many applications. In particular, thin products have high strength but can be reduced in weight, can be easily molded, and can be further improved in rigidity depending on the processed sectional shape.
It is widely used for various applications by utilizing many characteristics such as non-combustion and conductivity.

However, since the metal plate is easily corroded, easily vibrated, and hardly attenuated, it has a drawback that a large amount of sound is generated due to the vibration and that there are many high-frequency components that are unpleasant to humans. Further, from the viewpoint of combustion and heat insulation, the thermal conductivity is large and the surrounding temperature is quickly increased. Or, conversely, it has a property that it is difficult to obtain a heat insulating effect in that cooling is quickly caused.

In terms of the corrosion mentioned above, it can be improved by laminating a polymer, applying paint or plating, or using a metal itself as an alloy such as stainless steel. Although it is not enough, it is in a state where it is possible to take a satisfactory anticorrosion measure.

[0005] However, in the field relating to sound and vibration, the metal plate resonates when subjected to vibration by a vibrating source, generates a loud sound, and lasts for a long time. Met.

In order to solve the above-mentioned drawbacks, a restrained damping steel plate having a viscoelastic body interposed between metal plates has been put on the market for vehicles, light electric appliances, and parts related to building materials, and has been used, but has been deep drawn. However, it has not been widely used due to problems such as insufficient properties, difficulty in cutting, and insufficient weldability, and an increase in cost.

On the other hand, it is also considered that a gypsum board or styrofoam is bonded to a metal plate. However, since the metal plate is provided with a thickness several times that of the metal plate, the advantage of the thin metal is impaired. Conversely, it is inconvenient in terms of weight increase and incombustibility,
In addition, since the cost is greatly increased compared to the original metal plate, there has been a problem that versatility is lost.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem of the conventional metal plate, and to reduce the vibration attenuation,
An object of the present invention is to obtain a low-cost metal plate having a large decay rate, a small sound output, excellent nonflammability, high corrosion resistance, and low cost. In order to achieve this object, the vibration-damping metal plate of the present invention is provided on at least one side of the metal plate with an inorganic material having an inorganic content of 85% by weight or more after burning in a thickness equal to or greater than the thickness of the metal plate. It is characterized by the following.

For the purpose of firmly adhering to a metal plate, an adhesion improving material may be mixed in an inorganic material, an adhesion improving material may be provided in advance by coating or the like, or both of them may be performed. .

[0010] Further, a mesh material may be provided in or on the inorganic material, or an inorganic fibrous material may be provided on the surface of the inorganic material.

Further, an inorganic hollow material, an inorganic porous material, a substance having a thermal expansion property is mixed into the inorganic material, or an inorganic material containing the above-mentioned substance and having 85% by weight or more of inorganic material after burning. An inorganic material satisfying a certain condition may be provided on the surface of the inorganic material.

[0012]

As a result, it has been found that the vibration of the metal plate can be extremely reduced, and that the vibration can be rapidly attenuated. With this, the amount of sound generation is also extremely reduced and the background noise level is quickly reached.

[0013] In addition, in addition to the nonflammability due to the inorganic substance, especially in a system in which an adhesion improver is used in combination,
Not only is it excellent in adhesiveness, it is also excellent in corrosion resistance, and it is versatile enough in cost because it is mainly made of inorganic material,
It was confirmed that building materials that could not be used because of increased costs could be shared.

Further, by using a mesh material in or on the surface of the inorganic material, it is possible to prevent an accidental peeling accident, and in the case of a non-combustible mesh material, it is possible to prevent peeling in a fire. The thickness unevenness of the inorganic material at the time of construction on site can also be prevented.

When an inorganic hollow material, a porous material, or a substance having a thermal expansion property is mixed in the inorganic material or provided on the surface, a heat insulating effect can be exerted at the time of use, and the metal can be used in the event of a fire. The temperature rise to the plate can be prevented, and in the conventional metal plate, a flammable environment was created by quickly transferring heat to a wide area. However, according to the present invention, the area for the flammable environment is small, and the damage is smaller. be able to.

Further, when an inorganic fibrous material is provided on the surface of the inorganic material, the heat insulating effect is further improved, and a sound absorbing effect is produced in terms of sound. The effect of prevention occurs.

[0017]

Next, a damping metal plate of the present invention will be described with reference to the illustrated embodiment. FIG. 1 shows a first example of the damping metal plate of the present invention.
In the embodiment, an inorganic material 3 is provided on a metal plate 1 with an adhesion improving material 2 interposed therebetween. Metal plates are iron, aluminum,
Metals such as copper and lead, stainless steel, brass, duralumin and other alloys, galvanized steel plate, galvanium steel plate, etc., fluorine resin, acrylic resin, urethane resin, epoxy resin, vinyl chloride resin, chlorinated rubber, hypalon, etc. It may be one that has been painted or coated. Further, it may be formed in advance, or may have been already applied and mounted, or may be in the form of a flat plate, and can be widely used for most metal plates.

As the inorganic material, cement such as Portland cement, furnace cement, alumina cement, etc., or a hydraulic material such as gypsum or lime, alone or in combination, is used for sand, fly ash, talc, clay, calcium carbonate, metal hydroxide Stuff,
Metal oxides, borax, graphite, perlite, ground slag,
Inorganic fillers such as glass balloons, rubber powder, resin powder,
Foamed rubber and foamed resin powder, paper powder, wood wool, woody powder,
Organic powders such as cork powder, and various inorganic and organic fiber powders can be used.

Among the above-mentioned effects, in more detail, in order to improve heat insulation, inorganic porous rubber such as a glass balloon or an organic porous material such as plastic foam powder, wood powder, cork powder, or the like; An inorganic porous material such as pearlite is effective, and is particularly effective since the above-mentioned inorganic material and cork powder heat-expandable graphite hardly conduct heat during combustion.

Further, an emulsion or resin such as acrylic, EVA, vinyl acetate copolymer resin, vinyl chloride, epoxy, vinylidene chloride, urethane, butyl rubber, chloroprene rubber, etc. is added to the hydraulic substance as a polymer component, and the mixture is mixed to obtain an adhesive property. Although it is desirable to improve environmental barrier properties, from the viewpoint of flammability and cost, it is necessary that the polymer component and the organic substance should be 85% by weight or more of an inorganic material after combustion, and the average thickness is equal to that of a metal plate. It is necessary that a thickness equal to or greater than that be formed. That is, if the average thickness is thinner than the metal plate, sufficient vibration damping properties cannot be obtained, and there is a defect that the sound volume reduction effect and the background noise level cannot be reached quickly, but there is no difference in thickness at a very small portion. Alternatively, a continuous small uneven surface may be formed by coating with a mastic roller or the like.

Further, due to problems in coating workability and production, inorganic materials are usually used in the concrete industry to control the amount of water added, the flowability after kneading, and the curability.
If necessary, additives such as a water reducing agent, a fluidizing agent, an air entraining agent, a setting accelerator, a setting retarder, a thickener, and a water repellent may be used.

Next, the adhesion improver will be described. The adhesion improver may be provided in advance by directly applying it to a metal plate or the like, or may be used by being mixed with an inorganic material, and either may be used. In the case of, when used in the form of a solution based on butyl rubber or recycled butyl rubber, when used in an emulsion based on an acrylic resin or a copolymer thereof, in some cases, an epoxy resin is used as a base, all of which are dried or reacted An inorganic material may be provided later, or an inorganic material may be provided when it is not dried or unreacted. In particular, the latter uncoated and unreacted overcoating is likely to have a bad influence on the adhesive performance according to common sense, but in practice a good result is obtained. on the other hand,
In the case of butyl rubber, it is preferable to use a butyl rubber or recycled butyl rubber solution or a dispersion of butyl rubber or recycled rubber in sand beforehand, and further disperse cement, and use an acrylic resin or a copolymer thereof as a base. In such a case, it is preferable to use it by mixing it with water to be added in advance. In the case of using an epoxy resin as a base, it is preferable to mix and disperse in advance with sand, mix with cement, and add a curing agent or water. All of the above methods are means for efficiently dispersing a small amount of additives so that the inorganic material after combustion becomes 85% by weight or more, and always obtaining the same result.

Next, a second embodiment of the present invention will be described. FIG. 2 shows a second embodiment of the vibration-damping metal plate of the present invention,
In this embodiment, an inorganic material 3 is provided on one surface of a metal plate 1 via an adhesion improving material 2, a mesh 4 is provided in the inorganic material 3, and the inorganic material 3 is directly provided on the other surface of the metal plate 1. It has become. The mesh member provided on the damping metal plate of this embodiment will be described. The net-like material referred to in the present invention also includes a structure in which the intersections of the thread-like material and the thread-like material are not necessarily integrated, but also a structure in which the cloth or the thread-like material only intersects, that is, such a structure can sufficiently exhibit its purpose. Things. The mesh is buried in the inorganic material or provided on the surface of the inorganic material.The purpose of the net is to prevent peeling in the event of a long-term vibration or impact on an overhanging or vertical surface in case of a peeling accident. , In case of fire.

Next, a third embodiment of the present invention will be described. FIG. 3 shows a third embodiment of the vibration-damping metal plate of the present invention,
In this embodiment, an inorganic material 3 is provided directly on one side of a metal plate 1,
The configuration is such that the inorganic fibrous material 5 is provided thereon.
The inorganic fibrous material provided on the damping metal plate of this embodiment will be described. The present invention was originally intended to further reduce vibration and sound generated from a metal plate provided with an inorganic material. However, purchasing a countermeasure with a product having many functions is more effective. That is, if only the metal plate is used to cover the compressor of the sound source, the metal plate serving as the cover is vibrated through the compressor mount to generate noise. Therefore, using a metal plate provided with an inorganic material according to the present invention reduces noise from the metal plate,
If the operating noise of the compressor is loud, the reduction of the operating noise of the compressor may still be insufficient. In such a case, by providing the inorganic fibrous material on the surface of the inorganic material provided on the metal plate, the amount of reduction in the operating noise of the compressor can be further increased. That is, the inorganic fibrous material can also exert the effect as a sound absorbing material and, when in contact with a vibrating part, as a vibration insulating material.

Next, the application of the present invention will be briefly described. The present invention may be roughly divided into a case where it is constructed on site and a case where it is manufactured in a factory in advance. In the case of construction on site, spraying with a ricin gun or the like, mastic roller or ironing is possible, and the construction method can be properly used according to the size and shape of the object. On the other hand, when pre-manufactured in a factory, an inorganic material is sprayed or applied to a pre-formed metal plate directly or by treating it with an adhesion improver, and cured and cured in a heating / humidifying tank or at room temperature to cure the product. I do. As described above, construction and manufacturing can be performed very easily.

[Experimental Example] Next, an experimental example by a performance comparison test on an embodiment of the vibration-damping metal plate of the present invention will be described. 1. Specimen 1t × 300 W × 600 L Iron plate, 1t ×
Iron plate with dimensions of 70W × 70L, 1t × 15W × 20
The composition of the inorganic material used in the following experimental examples was applied to an iron plate having a size of 0 L using a mastic roller and dried at room temperature for 14 days. 2. Mixing of inorganic materials used in experimental examples

Experimental Example 1 * 1 Melment F10M manufactured by Hoechst Gosei Co., Ltd. * 2 Acquisset 301 manufactured by Nippon Shokubai Chemical Co., Ltd.

Experimental Example 2 * 1 Melment F10M manufactured by Hoechst Gosei Co., Ltd. * 2 Movinyl LP-3600 manufactured by Hoechst Gosei Co., Ltd.

Experimental Examples 3, 4, 5 * 1 AER 331 manufactured by Asahi Kasei Kogyo Co., Ltd. * 2 DER 732 manufactured by Asahi Dow Chemical Co., Ltd. * 3 BECKOPOXSPEZ HAEH 6 manufactured by Hoechst Gosei Co., Ltd.
23 HAEH 623W

Experimental Example 6 Note 1 Adjusted according to the following formulation. * 2 Vinegar / veova copolymer resin manufactured by Hoechst Synthetic Co., Ltd. * 3 Organic component of Hayakawa Rubber 60wt%

3. Test Method 1) Acoustic Characteristics As shown in FIG. 4, two specimens each coated with the inorganic material shown in the formulation of the experimental example were suspended by two suspension threads 6 attached to the suspension holes 7 as shown in FIG. As shown in FIG. 5, a weight 10 suspended by a thread 6 is placed at a point 1/3 of the longitudinal direction at the center of the short side direction of the sample from the 90 ° direction (FIG. 4).
Then, the microphone 11 is set at a position of 1.2 m in height at a position 1 m away from the opposite side of the excitation, and a precision sound level meter 12, a frequency analyzer 13, The noise level was measured via the recorder 14. Comparative Example 1
The amount of improvement from the iron plate alone shown in (1) is shown. In addition, as a decay time, a time for reducing the maximum sound volume by 20 dB was measured.

2) Vibration Suppression A test specimen coated with each of the inorganic materials shown in the formulation of the experimental example by the measuring apparatus shown in FIG. The loss coefficient was measured from the response characteristics. A non-contact type electromagnetic transducer 16 and a non-contact type capacitive transducer 17 are attached to the complex elastic modulus measuring device 15, and the non-contact type electromagnetic transducer 16 is directly connected to the 2ch FET analyzer 19. The contact capacitive transducer 17 is connected via a preamplifier 18. At the time of measurement, a vibration is generated from the non-contact type electromagnetic transducer 16 to vibrate the test body 9, the response characteristics of the test body 9 are detected by the non-contact type capacitive transducer 17, and amplified by the preamplifier 18. The received signal is received by the 2ch FET analyzer 19 and measured.

3) Adhesiveness Attachment of 5 cm × 4 cm was attached to the center of both sides of the specimens coated with the inorganic materials shown in the formulation of the experimental example with epoxy adhesive, and vertical uniaxial tension was applied. The value obtained by dividing the adhesive stress by 5.times.4 cm @ 2 was defined as the adhesive strength.

4) Corrosion resistance A scratch mark reaching the iron plate was placed at the center of the test specimen coated with the inorganic material shown in the formulation of the experimental example.
The salt spray test shown in JIS-K-5400 was performed for 500 hours, and the degree of rusting was visually observed.ふ indicates that no swelling or peeling due to rusting was observed, and rusting was within 5 mm from the scratch mark, and x was otherwise.

5) Combustibility Using the sample after measuring the acoustic characteristics, the sample was continuously heated with a gas burner for 10 minutes and was not burned, and the sample was not burned, and the sample was burnt.

[0036]

[Table 1]

Next, based on Table 1, the test results of the embodiment of the damping metal plate of the present invention will be considered. Experimental example 1
This is an example in which the inorganic material shown in Experimental Example 1 was directly applied to an iron plate with a mastic roller and dried. The amount of improvement in the amount of sound production is 15 dB (A), and the attenuation is reduced to 70% of that when no processing is performed. In addition, the loss coefficient is 0.15, which indicates that it is very effective for sound and vibration. The adhesive strength is large and 5.7 kgf / cm ^2,
The corrosion resistance was also good. Also, the flame resistance was good.

Experimental Example 2 is an example in which the inorganic material shown in Experimental Example 2 was directly applied to an iron plate with a mastic roller and dried, and an inorganic porous material and a heat-expandable material were mixed therein. The amount of improvement in the amount of sound production is 13 dB (A), and the attenuation is reduced to 60% when no processing is performed. Also, the loss factor is 0.11,
Highly effective for sound and vibration. The adhesive strength was sufficient at 5.3 kgf / cm2, and the corrosion resistance was also good. Also, the flame resistance was good.

In Experimental Examples 3 to 5, the inorganic material shown in Experimental Example 3 was directly applied to an iron plate, and in Experimental Example 4, a glass fiber net was placed directly on the iron plate immediately after the inorganic material was applied. This is an example in which an inorganic material was further applied thereon.
Is an example in which rock wool was attached and dried immediately after the inorganic material was applied, as in Experimental Example 3. Experimental example 3
The epoxy resins used in Nos. 1 to 5 are also examples in which they are mixed in an inorganic agent as an adhesion improver.

The amount of improvement in the amount of sound produced in Experimental Examples 3 to 5 is 14 to 17 dB.
(A), the attenuation is reduced to 50% to 65% as compared with the non-treatment, and the loss coefficient is 0.13 to 0.18, which indicates that the effect is very high. The adhesive strength was represented in Experimental Example 3, but 7.4
kgf / cm ² was very good. In addition, the corrosion resistance was good as determined in Experimental Examples 3 and 4. The combustion resistance was also good.

Experimental Example 6 shows an example in which the butyl regenerated rubber solution described in Note 1 of Experimental Example 6 was previously applied to an iron plate as an adhesion improving material, dried, and then the inorganic material of Experimental Example 6 was applied. . The amount of improvement in the amount of sound production was 18 dB (A), and the attenuation was reduced to about 40% compared with the case where no processing was performed. 0.22 loss factor
It turns out that it is very effective. Adhesion strength is 6.9
kgf / cm ² , which was sufficient, and the corrosion resistance was very good although some rust was observed on the cross cut. The combustion resistance was also good.

Comparative Example 1 was a single iron plate, and was used for confirming various performances. Comparative Example 2 shows an example in which the residue of combustion is as small as 80 wt% and the average coating thickness is as thin as 0.8. The noise is little improved, the combustion is easy, and the corrosion resistance is blistering and peeling around the scratch mark. And
This departs from the purpose of the present invention.

[0043]

As described in detail above, the present invention can be applied in various ways depending on the situation, and can have not only vibration and sound but also functions such as adhesion, corrosion prevention, combustion, and heat insulation, and can be more durable. A low-cost, versatile vibration-damping metal plate can be provided in consideration of the characteristics and safety in the event of a fire.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of a first embodiment of a damping metal plate of the present invention.

FIG. 2 is a cross-sectional view showing a configuration of a second embodiment of the damping metal plate of the present invention.

FIG. 3 is a sectional view showing a configuration of a third embodiment of the damping metal plate of the present invention.

FIG. 4 is a diagram showing a state in which two test bodies for testing the acoustic characteristics of the damping metal plate of the present invention are suspended.

FIG. 5 is a side view of FIG. 4 showing the overall configuration of the testing device for acoustic characteristics of the damping metal plate of the present invention.

FIG. 6 is a diagram showing the overall configuration of a test apparatus for testing the damping performance of a damping metal plate according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 metal plate 2 adhesion improving material 3 inorganic material 4 mesh material 5 inorganic fiber material 6 hanging thread 7 hanging hole 8 excitation point 9 test body 10 weight 11 microphone 12 precision sound level meter 13 frequency analyzer 14 recorder 15 complex elastic modulus Measuring device 16 Non-contact electromagnetic transducer 17 Non-contact capacitive transducer 18 Preamplifier 19 2ch FFT analyzer

Claims (5)

(57) [Claims] 1. A vibration-damping metal plate provided with an inorganic material having an inorganic content of 85% by weight or more after combustion on at least one surface of the metal plate at a thickness equal to or greater than the thickness of the metal plate. 2. The method according to claim 1, wherein the inorganic material is mixed with an adhesion improving material for firmly adhering to a metal plate, and / or the adhesion improving material is previously provided by application or the like in order to firmly adhere to the metal plate. The damping metal plate according to claim 1. 3. The vibration-damping metal plate according to claim 1, wherein a mesh is provided in or on the inorganic material. 4. An inorganic material in which an inorganic hollow material, an inorganic porous material, or a material having a thermal expansion property is mixed into the inorganic material, or contains 85% by weight or more of an inorganic material after combustion. 2. The vibration-damping metal plate according to claim 1, wherein an inorganic material satisfying the following condition is provided on the surface of the inorganic material. 3. 5. The vibration-damping metal plate according to claim 1, wherein an inorganic fibrous material is provided on the surface of the inorganic material.