CN201931663U - Heat-insulation sound-adsorption damping gasket for vehicle - Google Patents

Abstract

The utility model relates to an automobile inner structure, in particular to a heat-insulation sound-adsorption damping gasket for a vehicle. The heat-insulation sound-adsorption damping gasket for the vehicle is characterized by comprising a damping layer, a sound adsorption layer and a heat insulation layer, wherein the damping layer is made of butyl rubber; the sound adsorption layer is made of melamine resin; the heat insulation layer is made of a metal aluminium foil; the damping layer is adhered to the sound adsorption layer; and the sound adsorption layer is adhered to the heat insulation layer. The heat-insulation sound-adsorption damping gasket for the vehicle can effectively adsorb sound, insulate heat and carry out damping and vibration reduction.

Description

Heat insulation, sound absorption and damping pads for automobiles

technical field

The utility model relates to an automobile internal structure, in particular to a heat-insulating, sound-absorbing and damping pad for automobiles.

Background technique

Noise, vibration and comfort are comprehensive technical indicators to measure the level of modern automobile manufacturing. At present, the functions of sound-absorbing, sound-insulating, vibration-reducing, and sealing materials used in vehicles are relatively simple. Most of the sound-absorbing materials are polyurethane or fiber materials, which cannot exert excellent damping effects, and rubber damping materials have poor weakening effects on medium and high-frequency noise. For example, the Chinese patent announcement number is: CN2604758Y, a sound-absorbing panel disclosed on February 25, 2004. It is composed of a sound-absorbing layer and a support plate. There is a layer of non-woven fabric, the sound-absorbing layer is fixed on the support plate by nails, and a layer of wax is coated around the sound-absorbing layer. Although this patent structure is simple, sound-absorbing effect is good. But it does not have the effect of damping vibration and heat insulation.

Contents of the invention

The utility model mainly aims at the problem that the existing pads have only single function of sound absorption, sound insulation, and vibration reduction, and provides a heat-insulating, sound-absorbing, and damping pad for automobiles that can effectively absorb sound, heat insulation, and damp vibration.

The purpose of this utility model is mainly achieved through the following scheme: a heat-insulating and sound-absorbing damping pad for automobiles, the heat-insulating and sound-absorbing damping pad for automobiles includes a damping layer made of butyl rubber and a sound-absorbing pad made of melamine resin. layer and a heat-insulating layer made of metal aluminum foil, the damping layer is bonded to the sound-absorbing layer, and the sound-absorbing layer is bonded to the heat-insulating layer. Due to the high value of the damping factor of the butyl rubber material itself, the damping layer made of butyl rubber can suppress the low-frequency vibration noise generated by the excitation of the body sheet metal. The melamine resin material has good heat resistance, especially the acoustic performance of the material at high temperature, and the melamine resin material has excellent sound absorption and heat resistance, and is light in weight. Thermal properties, so the sound-absorbing layer made of melamine resin can effectively absorb sound. The material itself of the metal aluminum foil has a small heat transfer coefficient and can insulate heat well, so the heat insulation layer made of the metal aluminum foil can reduce the heat transferred to the passenger compartment. Due to the protective effect of the metal aluminum foil surface, the material is not easy to mildew and has good durability. Bonding the damping layer, sound-absorbing layer and heat-insulating layer in the car body in sequence can effectively achieve the effects of damping and vibration reduction, sound-absorbing and heat-insulating, and improve the comfort of the car.

Preferably, the thickness of the damping layer is 1.2mm-2mm. The value of the damping factor of the butyl rubber material itself is relatively high. From the perspective of saving material and space, the thickness of the damping layer is set at 1.2 mm to 2 mm, which is sufficient to achieve the function of damping and vibration reduction.

Preferably, the thickness of the sound-absorbing layer is 5 mm to 10 mm. The material of the sound-absorbing layer is melamine resin, and the material density is only 9Kg/m ³ . From the perspective of saving materials and space, the thickness of the sound-absorbing layer is set at 5mm-10mm, which is sufficient to realize the sound-absorbing function.

Preferably, the thickness of the heat insulation layer is 0.8mm-1.2mm. The surface of the metal aluminum foil has a protective effect, the material is not easy to mildew, and has good durability. From the perspective of saving materials and space, the thickness of the heat insulation layer is set at 0.8mm to 1.2mm, which is sufficient to realize the heat insulation function.

Therefore, the heat-insulating and sound-absorbing damping pad for automobiles of the present utility model has the following advantages: 1. The damping layer made of butyl rubber can suppress the low-frequency vibration noise generated by the excitation of the body sheet metal, and has a good damping and vibration reduction effect; 2. The sound-absorbing layer made of melamine resin has a good sound-absorbing effect; 3. The heat-insulating layer made of metal aluminum foil itself has a small thermal conductivity coefficient, which can well insulate heat and has a good heat-insulating effect.

Description of drawings

Accompanying drawing 1 is a kind of structural representation of the utility model.

Illustration: 1-damping layer, 2-sound-absorbing layer, 3-heat insulation layer, 4-exterior sheet metal.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

As shown in FIG. 1 , a heat-insulating and sound-absorbing damping pad for automobiles is composed of a damping layer 1 , a sound-absorbing layer 2 and a heat-insulating layer 3 bonded in sequence. The damping layer 1 is made of butyl rubber, with a thickness of 1.2mm-2mm, preferably 1.5mm; the sound-absorbing layer 2 is made of melamine resin, with a thickness of 5mm-10mm, preferably 8mm; the heat-insulating layer 3 is Made of metal aluminum foil, the thickness is 0.8mm~1.2mm, preferably 0.8mm. Due to the viscosity of butyl rubber itself, one side of the damping layer 1 is bonded to the inner side of the outer sheet metal 4 of the vehicle body through its own viscosity, and the other side of the damping layer 1 is bonded to one side of the sound-absorbing layer 2 through its own viscosity. . The other side of the sound-absorbing layer 2 is bonded to the heat-insulating layer 3 through an acrylic adhesive.

Due to the high value of the damping factor of the butyl rubber material itself, the value of the damping factor at room temperature is above 0.2, so its damping effect is excellent. Stretching, compression, shearing, etc., so that the system converts part of the elastic energy into irreversible thermal energy. The damping layer 1 made of butyl rubber can achieve the purpose of damping and vibration reduction. The heat resistance of the melamine resin material is better, especially the acoustic performance of the material is strong at high temperature, and the density of the material is only 9Kg/m ³ , which is much smaller than that of polyurethane. The porous structure of the melamine resin is more conducive to the frictional loss of sound wave energy, and the sound-absorbing layer 2 made of the melamine resin has a good sound-absorbing effect. The thermal conductivity coefficient of the metal aluminum foil itself is small, which can well insulate heat and reduce the heat transferred to the passenger compartment. Moreover, due to the protective effect of the aluminum foil surface, the material is not easy to mildew and has good durability. The heat insulation layer made of metal aluminum foil instead of non-woven fabric has good heat insulation effect and is not easy to mildew. The pad is compounded by damping material, attracting material and heat insulating material, which greatly improves the comfort of the car.

It should be understood that this embodiment is only used to illustrate the utility model but not to limit the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.

Claims (4)

1. A heat-insulating and sound-absorbing damping pad for automobiles, characterized in that the heat-insulating and sound-absorbing damping pads for automobiles comprise a damping layer (1) made of butyl rubber, a sound-absorbing layer (2) made of melamine resin and metal The heat insulation layer (3) made of aluminum foil, the damping layer (1) is bonded to the sound-absorbing layer (2), and the sound-absorbing layer (2) is bonded to the heat-insulation layer (3). 2. The heat-insulating, sound-absorbing and damping pad for automobiles according to claim 1 or 2, characterized in that the thickness of the damping layer (1) is 1.2mm-2mm. 3. The heat-insulating, sound-absorbing and damping pad for automobiles according to claim 1 or 2, characterized in that the thickness of the sound-absorbing layer (2) is 5mm-10mm. 4. The heat-insulating, sound-absorbing and damping pad for automobiles according to claim 1 or 2, characterized in that the thickness of the heat-insulating layer (3) is 0.8mm-1.2mm.