KR100266856B1 - Foamed aluminium sound-absorbing panel with fiber adhered to and producing method thereof - Google Patents

Abstract

PURPOSE: A foam aluminum sound absorption panel combined with a fiber string and a manufacturing method thereof are provided to improve a sound absorption efficiency in a wide frequency band by coating with a fiber string on the surface of the foam aluminum sound absorption panel. CONSTITUTION: A foam aluminum sound absorption panel changes a closed bubble into an opened bubble(12) by the rolling process. A panel(10) has the opened bubble(12) and soaks in a water tank(14) which is filled with a water. An impurity is removed from the foam aluminum panel(10) with an ultrasonic waves. The moisture remaining in the foam aluminum panel(10), is dried in the heating furnace. An adhesive agent(20) is coated on the surface of the foam aluminum panel(10). A powder of a fiber string(30) is injected on the adhesive agent(20) by means of the electrostatic generator(32). The fiber string(30) is coated on the foam aluminum panel(10). The foam aluminum panel(10) is preheated and dried in the dryer. The adhesive agent(20) is hardened on the surface of the foam aluminum panel(10).

Description

Foamed aluminum sound-absorbing panel combined with fiber yarn and manufacturing method thereof

(Technology)

The present invention relates to a foamed aluminum sound-absorbing panel in which fiber yarns are bonded, and a method of manufacturing the same. More specifically, the present invention relates to a building finishing material and an industrial sound-absorbing material that require sound absorption by bonding fiber yarns to a surface of a foamed aluminum panel having open bubbles. It relates to a foamed aluminum sound absorbing panel that can be used and a method of making the same.

(Background)

In everyday life, undesired sound, ie noise, is generated by various factors such as the operation of various mechanical equipment, the operation of transportation means such as automobiles, railways, subways, aircrafts, the construction of heavy equipment, or the operation of various acoustic devices. It is ready. These noises personally cause hearing loss, headaches, anxiety, etc., and cause harm to health, and in an industrial site, create a poor working environment and generate vibrations, resulting in deterioration of productivity and product quality.

Therefore, the noise sources should be designed to generate as little noise as possible, and if the noise is inevitably generated, measures should be taken to prevent the noise from propagating outside.

The need for sound insulation is almost all around, such as workplaces, roadsides, railroads, airports, construction sites, heavy equipment, communal dwellings such as apartments or offices, concert halls or theaters, indoor sports facilities, and various recreational facilities. It is required for living environment.

As a conventional soundproofing method, various soundproofing materials made of a material having sound absorption or soundproofing performance are used, and soundproof structures such as soundproof walls, partitions, soundproof rooms, and finishing materials for sound treatment are absorbed and propagated. Blocking paths is widely used.

In general, the soundproofing materials widely used include various materials such as general building materials such as wood or concrete, synthetic resin materials such as polyurethane, polyethylene or polyester, inorganic fiber materials such as glass wool or rock wool, and metal materials such as metal perforated plates. And single or combination thereof.

The sound insulation material may vary depending on the place and purpose of use, but it has excellent sound absorption and sound insulation in a wide frequency range, excellent mechanical properties (durability, etc.), and thermal properties (non-flammability, flame retardancy, etc.), but the manufacturing cost is low and construction is easy. It would be desirable to be simple.

However, conventional sound insulation materials do not meet the requirements of some of the various requirements described above, and present significant problems in applying them to the construction of sound insulation facilities. For example, soundproofing materials made of wood or plastic resin are weak to heat and vulnerable to fire. Glass wool and rock wool have a problem of causing environmental pollution, and aluminum plates are not sufficiently capable of preventing noise. There is a limit. In addition, conventional soundproofing materials other than metal materials are almost impossible to recycle, generating a lot of garbage.

Accordingly, an object of the present invention is to provide excellent sound absorption performance in a wide range of frequencies, not to cause pollution, and to be recycled. It is to provide a non-flammable, ultra-light weight soundproof material that can be used as a sound absorbing material in an industrial field.

Another object of the present invention is to provide a soundproofing material having an improved sound absorption performance capable of absorbing low-frequency noise as well as high-frequency noise.

1 is a view showing a method of manufacturing a foamed aluminum sound absorbing panel in which fiber yarns according to the present invention is bonded

Figure 2 is a perspective view of a foamed aluminum sound absorbing panel combined with a fiber yarn according to the present invention,

3 is a cross-sectional view of FIG.

* Description of the symbols for the main parts of the drawings *

1: foamed aluminum sound absorbing panel with fiber yarn

10: foamed aluminum panel 12: air bubbles

20: adhesive 30: fiber yarn

An object of the present invention described above is to coat the fiber yarn on at least one side of the foamed aluminum panel with open bubbles, the noise in the low frequency region is absorbed by the open bubbles of foamed aluminum and the noise in the high frequency region is coated fiber It is achieved by a foamed aluminum sound-absorbing panel in which fiber yarns are adapted to be absorbed by yarns.

More specifically, an object of the present invention is based on a foamed aluminum panel having an open bubble prepared by rolling a foamed foamed aluminum foam to convert a closed bubble into an open bubble, and having the open bubble The at least one side of the foamed aluminum panel is achieved by a foamed aluminum sound-absorbing panel in which fiber yarns formed by bonding fiber yarns with an adhesive.

The foamed aluminum sound-absorbing panel in which the fiber yarns are bonded comprises the steps of: rolling a foamed aluminum panel having a plurality of bubbles to convert closed bubbles into open bubbles; Washing the foamed aluminum panel with the open bubbles; Drying the washed foamed aluminum panel; Applying an adhesive to at least one surface of the dried foamed aluminum panel; Generating a static electricity while preheating the foamed aluminum panel to which the adhesive is applied, and electrostatically bonding the generated static yarn to the surface of the adhesive to coat the fiber yarn on the foamed aluminum panel; And preheating the foamed aluminum panel coated with the fiber yarn to cure the adhesive.

The foamed aluminum panel having a plurality of open bubbles used as a base material for the foamed aluminum sound absorbing panel according to the present invention is formed by foaming aluminum to form a plurality of open bubbles. In the foamed aluminum panel having open bubbles, aluminum metal is melted in a mold equipped with a heater and a stirrer, a viscosity increasing agent is added to maintain a proper viscosity, and then a foaming agent is added to form bubbles. After producing foamed aluminum by a known aluminum foaming process, the foamed aluminum is rolled to produce a method of converting closed bubbles into open bubbles.

The term "open bubble" here means that the bubbles formed in the foamed aluminum are open rather than closed. Most of the bubbles of foamed aluminum produced by conventional methods are closed so that each bubble forms a closed space. Since foamed aluminum having bubbles in the closed space does not sufficiently exhibit the effect of the bubbles absorbing sound waves, the foamed aluminum does not exhibit sufficient sound insulation performance for the purpose of the present invention. Accordingly, in the present invention, the foamed aluminum is lightly rolled by a rolling mill to burst the closed bubbles and convert them into open (opened) bubbles.

Hereinafter, with reference to the accompanying drawings will be described in detail a foamed aluminum sound-absorbing panel with a fiber yarn according to the present invention. The following embodiments merely illustrate the foamed aluminum sound-absorbing panel in which the fiber yarns according to the present invention are bonded, but are not intended to limit the scope of the present invention.

1 is a view showing a method of manufacturing a foamed aluminum sound-absorbing panel combined with fiber yarns according to the present invention, Figure 2 is a perspective view of a foamed aluminum sound-absorbing panel is bonded fiber yarns according to the present invention, Figure 3 is a cross-sectional view of FIG.

With reference to Figure 1 will be described a method of manufacturing a foamed aluminum sound absorbing panel is bonded fiber yarns according to the present invention.

In the first step of manufacturing the foamed aluminum sound-absorbing panel 1 in which the fiber yarns according to the present invention are bonded, the foamed aluminum panel is rolled to convert bubbles in the closed state into open bubbles.

Rolling the foamed aluminum panel 10 to convert the closed bubble into an open bubble 12 is achieved by, for example, pressing the foamed aluminum panel in the thickness direction to reduce the thickness of the panel 10 by 20-30%. . The rolling reduction can be appropriately adjusted according to the use, thickness, etc. of the foamed aluminum panel, but it should be such that the bubble 12 is not compressed and disappeared by increasing the rolling amount excessively. The foamed aluminum panel thus produced becomes porous including a large number of open bubbles, and at least 90% of the total volume becomes an ultra-light absorption panel made of bubbles.

The second step is to clean the foamed aluminum panel 10 with open bubbles 12. The present cleaning process is a pretreatment step of removing impurities to ensure that the fiber yarn 30 adheres well to the surface of the foamed aluminum 10 in a series of subsequent fiber yarn bonding processes, wherein the foamed aluminum panel 10 is cleaned. Although the method is not particularly limited, it is preferable to apply an ultrasonic wave 18 to the aluminum panel 10 immersed in the water tank 14 containing water 16 to remove impurities by vibration.

The three step process is a process of drying the washed foamed aluminum panel (10). When the water introduced in the washing process remains in the foamed aluminum panel 10, the fiber yarn 30 may be unsafely bonded to the panel 10 in a subsequent process, thereby causing peeling of the fiber yarn 30. Therefore, it is preferable to completely remove the moisture remaining in the panel 10 in a heating furnace such as a drying furnace.

Step 4 is a process of applying the adhesive 20 to at least one surface of the dried foamed aluminum panel 10. The adhesive that can be used in the present invention is not particularly limited as long as it can adhere various fiber yarns to the aluminum metal surface, for example, natural and inorganic adhesives such as water-soluble sodium silicate, casein, gum arabic, SBR, NBR, NBR Rubber adhesives such as latex, polyurethane adhesives, formaldehyde adhesives such as resol type phenol resins, and polymerization adhesives such as polyvinyl acetate or styrene adhesives may be used. desirable.

Step 5 is a process of applying the fiber yarn 30 to the surface of the panel 10, the adhesive 20 is applied, the fiber yarn 30 is to be attached to the adhesive 20 by using electrostatic attraction , By the adhesive force of the adhesive (20). Specifically, after the panel 10 is preheated, high-pressure static electricity is applied by the static electricity generating device 32, and the diluted fiber yarn powder is charged into the static electricity generating device 32 to impart static electricity. The fiber yarn powder is sprayed and coated on the adhesive 20 of the panel 10 moving at a predetermined speed.

As the fiber yarn 30 that can be used, natural fibers such as cotton, silk, wool, or chemicals such as nylon, rayon, polypropylene fiber, polyurethane fiber, acrylic fiber, acetate fiber, glass fiber, carbon fiber, polyester fiber, etc. Fiber, etc., and the fiber is used by grinding into a fine powder shape.

The coating thickness of the fiber yarn 30 can be adjusted to the required level by adjusting the moving speed of the panel 10 during the coating operation, the size of the fiber yarn, and the applied electrostatic voltage. In addition, since the color of the finally finished panel 1 is determined by the color of the fiber yarn 30 used, the color of the fiber yarn 30 is changed according to the use purpose and location of the panel 1 in this process. Choose appropriately.

The last six steps is a process to cure the adhesive 20 so that the fiber yarn 30 is fixed. That is, by preheating and drying the panel 10 coated with the fiber yarn 30 in a preheatable drying furnace to cure the adhesive 20, the foamed aluminum panel 1 for preventing noise is coated with the fiber yarn 30. Is completed.

In the foamed aluminum sound absorbing panel 1 of the present invention manufactured by the above method, as shown in FIGS. 2 and 3, the adhesive 20 is formed on one surface of the foamed aluminum panel 10 in which the bubbles 12 are formed. ) Has a configuration in which the fiber yarn 30 is coated and bonded.

The soundproofing material of the foamed aluminum sound-absorbing panel 1 coated with the fiber yarn according to the present invention is attenuated low frequency noise of 500 Hz or less by the open bubble 12 of the foamed aluminum panel 10, and at the same time, the bonded fiber yarn Since 30 reduces the reflection of high frequency noise and absorbs sound, the sound absorption effect in the wide range of audible frequencies is excellent.

The foamed aluminum sound absorbing panel coated with the fiber yarn according to the present invention is installed in a factory, office, residential building, railway, automobile, ship, aircraft, soundproof room, performance hall, broadcasting studio, gymnasium, etc. It can be used as walls (ceilings, floors), partitions, and finishing materials requiring various acoustic treatments.

The foamed aluminum sound-absorbing panel coated with the fiber yarn according to the present invention described above has the following effects. First, it has excellent sound absorption performance in a wide frequency range. Second, since the foam aluminum is used as the base material, it is light in weight, easy to process and handle, and excellent in durability. Third, the recycling can not only cause pollution but also save resources. Fourth, because it is nonflammable, it does not emit toxic gas in case of fire. Fifth, the shielding effect of electromagnetic waves harmful to the human body is excellent. Sixth, it is possible to produce a variety of designs by the fiber yarn bonded to the foamed aluminum panel and to exhibit a smooth texture can be used as a final interior finishing material.

Claims (3)

Rolling a foamed aluminum panel having a plurality of bubbles to convert closed bubbles into open bubbles; Washing the foamed aluminum panel with the open bubbles; Drying the washed foamed aluminum panel; Applying an adhesive to at least one surface of the dried foamed aluminum panel; Generating a static electricity while preheating the foamed aluminum panel to which the adhesive is applied, and electrostatically bonding the generated static yarn to the surface of the adhesive to coat the fiber yarn on the foamed aluminum panel; And preheating the foamed aluminum panel coated with the fiber yarn to cure the adhesive. Method for producing a foamed aluminum sound-absorbing panel is bonded fiber yarns comprising a. The method of claim 1, wherein the fiber yarn coating on the foamed aluminum panel having the open air bubbles, the high-pressure static electricity generated in the foamed aluminum panel by a static electricity generating means in the state of preheating the foamed aluminum panel, After generating the static electricity by the means for generating static electricity to the fiber yarn powder, the manufacturing method of the foamed aluminum sound-absorbing panel combined with the fiber yarn, characterized in that the fiber yarn powder is sprayed and coated while moving the foamed aluminum panel at a constant speed. Based on a foamed aluminum panel having an open bubble manufactured by rolling a foamed foamed aluminum to convert a closed bubble into an open bubble, the fiber on at least one side of the foamed aluminum panel with the open bubble Foamed aluminum sound-absorbing panel combined with a fiber yarn, characterized in that the yarn is bonded to the adhesive.