Automobile sound insulation pad in multi-layer structure and manufacturing method thereof

A multi-layer structure and sound-insulating pad technology, applied in chemical instruments and methods, layered products, vehicle parts, etc., can solve problems such as high cost, heavy weight, and complicated process, and achieve the effect of strengthening overall noise reduction and strengthening absorption

Active Publication Date: 2012-07-04
SHANGHAI XINAN CAR DEADENING FELT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) EPDM+polyurethane composite structure

Method used

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  • Automobile sound insulation pad in multi-layer structure and manufacturing method thereof
  • Automobile sound insulation pad in multi-layer structure and manufacturing method thereof
  • Automobile sound insulation pad in multi-layer structure and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for manufacturing a sound-insulating pad for automobiles with a two-layer structure, the method comprising the following steps:

[0018] (1) Production of high-density sound insulation material: Mix 60kg of fabric, 30kg of melted fiber and 10kg of sponge particles. After combing and netting, place it in an oven and control the temperature at 160°C for heat setting treatment for 4 minutes. Then cut to obtain a density of 220kg / m 3 high-density sound insulation material;

[0019] (2) Control the temperature at 200°C, heat and soften the high-density sound insulation material, place it in a molding mold, and control the pressure at 150bar for mold clamping and pressing for 500s to obtain a layer of uniformly thick and high-density felt hard layer;

[0020] (3) Control the foaming mold temperature to be 55°C, place the high-density felt hard layer in the foaming mold, polyether: the ratio of isocyanate is controlled at 55% to obtain the foaming material, and the t...

Embodiment 2

[0022] A method for manufacturing a sound-insulating pad for automobiles with a three-layer structure, the method comprising the following steps:

[0023] (1) Production of high-density sound insulation material: Mix 60kg of fabric, 30kg of melted fiber and 10kg of sponge particles. After combing and netting, place it in an oven and control the temperature at 160°C for heat setting treatment for 4 minutes. Then cut to obtain a density of 220kg / m 3 high-density sound insulation material;

[0024] (2) Control the temperature at 200°C, heat and soften the high-density sound insulation material, place it in a molding mold, and control the pressure at 150bar for mold clamping and pressing for 500s to obtain a layer of uniformly thick and high-density felt hard layer;

[0025] (3) Control the temperature of the foaming mold to be 55° C., place the hard layer of high-density felt in the foaming mold, polyether: the ratio of isocyanate is controlled at 55% to obtain the foaming mater...

Embodiment 3

[0028] A method for manufacturing a sound-insulating pad for automobiles with a two-layer structure, the method comprising the following steps:

[0029] (1) Production of low-density sound-insulating materials: Mix 80kg of polyester staple fiber and 20kg of melted fiber, comb and form it into a net, then place it in an oven, control the temperature at 190°C for heat setting for 2 minutes, and then The cutting density is 70kg / m 3 and low-density sound insulation material with a thickness of 15mm;

[0030] (2) Production of high-density sound-insulating hard layer material: control the temperature of the oven at 230°C, place the low-density sound-insulating material in the oven and heat until it is fully softened, then place the low-density sound-insulating material on the forming mold, and the gap between the upper and lower molds of the mold is 5mm, then close the mold immediately, control the pressure at 200bar and press the mold for 150s, then open the mold and take out the...

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Abstract

The invention relates to an automobile sound insulation pad in a multi-layer structure and a manufacturing method thereof. The sound insulation pad is of the two-layer or three-layer structure and constituted by a felt hard layer sound insulation material with the density of 200-220kg/m<3> and a polyurethane soft sound insulation material with the density of 60-70kg/m<3> by self-bonding of polyurethane, and the manufacturing method comprises the following steps of getting the low-density sound insulation pad and the high-density sound insulation pad according to a conventional method, heating for softening, die-pressing a layer of the felt hard layer sound insulation material, then placing the hard layer sound insulation material in a foaming die, and performing surface foaming to get the automobile sound insulation pad in the multi-layer structure. Compared with the prior art, the automobile sound insulation pad in the multi-layer structure, disclosed by the invention, can play a role in absorbing and attenuating high-frequency and low-frequency noise and further play the role in reinforcing overall sound insulation and reducing noise, and the a high-density felt hard layer can further play the role of a framework.

Description

technical field [0001] The invention relates to an automobile sound-insulating pad and a manufacturing method thereof, in particular to a multi-layered automobile sound-insulating pad and a manufacturing method thereof. Background technique [0002] At present, the dash panel in the passenger compartment of the automobile industry mainly includes two structures: (1) Most of the parts are made of a single-layer uniform thickness material. Since the outer side of the front wall is the engine compartment, the engine will generate a lot of noise when it is working, and the noise is divided into two parts: high frequency and low frequency; the sound insulation pad made of single-layer structure can significantly absorb high frequency noise , Attenuation, but can only partially absorb low-frequency noise. (2) EPDM+polyurethane composite structure: heavy weight, high cost, complex process. Contents of the invention [0003] The object of the present invention is to provide a mu...

Claims

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Application Information

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IPC IPC(8): B60R13/08B32B15/14B32B15/20B32B27/12B32B27/40C08L75/04C08L75/08C08G18/48C08G101/00
Inventor 金军
Owner SHANGHAI XINAN CAR DEADENING FELT
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