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Multilayer-structure sound-proof and heat-proof cushion used for automotive engine cabin and manufacture method thereof

A technology of engine compartment and multi-layer structure, applied in chemical instruments and methods, layered products, vehicle parts, etc., can solve the problems of general sound insulation and heat insulation effect, high temperature, heavy parts weight, etc., and achieve good sound insulation and heat insulation effect, enhance overall sound insulation, and reduce weight

Active Publication Date: 2014-08-27
SHANGHAI XINAN CAR DEADENING FELT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the engine in the engine compartment will produce a lot of noise and high temperature when it is working, the parts made of the above materials are heavy, the sound insulation effect is average, and the glass fiber has a great pollution to the environment.
(2) Composite structure of resin powder + cotton fiber: heavy weight, high cost, complex process

Method used

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  • Multilayer-structure sound-proof and heat-proof cushion used for automotive engine cabin and manufacture method thereof
  • Multilayer-structure sound-proof and heat-proof cushion used for automotive engine cabin and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of manufacture method of the sound-insulation and heat-insulation pad of automobile engine room of a kind of 3-layer structure, the structure of the sound-insulation heat-insulation pad that manufactures is as follows figure 1 As shown, the method includes the following steps:

[0024] (1) Production of flame retardant polyurethane foam layer:

[0025] ① Control the temperature of the foaming environment at 23°C;

[0026] ② Mix graphite powder and polyether in a weight ratio of 1:10, and control the mixing time to 30 minutes to obtain a mixture of graphite powder and polyether;

[0027] ③Put the mixture of isocyanate, graphite powder and polyether into the foaming machine respectively, adjust the weight ratio of isocyanate, graphite powder and polyether to 1:1, mix at 28°C, and mature for 30 minutes;

[0028] ④ Slice after foaming and aging, control the slice thickness to 20mm, and store for 24 hours after slicing;

[0029] (2) Compression molding:

[0030] ①...

Embodiment 2

[0035] A kind of manufacture method of sound-insulation and heat-insulation mat for automobile engine room of a kind of 4-layer structure, the structure of the sound-insulation and heat-insulation mat that manufactures is as follows figure 2 As shown, the method includes the following steps:

[0036] (1) Production of flame retardant polyurethane foam layer:

[0037] ① Control the temperature of the foaming environment at 23°C;

[0038] ② Mix graphite powder and polyether in a weight ratio of 1:10, and control the mixing time to 30 minutes to obtain a mixture of graphite powder and polyether;

[0039] ③Put the mixture of isocyanate, graphite powder and polyether into the foaming machine respectively, adjust the weight ratio of isocyanate, graphite powder and polyether to 1:1, mix at 28°C, and mature for 30 minutes;

[0040] ④ Slice after foaming and aging, control the slice thickness to 20mm, and store for 24 hours after slicing;

[0041] (2) Compression molding:

[0042]...

Embodiment 3

[0048] A method for manufacturing a sound-insulating and heat-insulating mat for an automobile engine compartment with a 3-layer structure, the method comprising the following steps:

[0049] (1) Production of flame retardant polyurethane foam layer:

[0050] ① Control the temperature of the foaming environment at 20°C;

[0051] ② Mix graphite powder and polyether in a weight ratio of 1:8, and control the mixing time to 40 minutes to obtain a mixture of graphite powder and polyether;

[0052] ③Put the mixture of isocyanate, graphite powder and polyether into the foaming machine respectively, adjust the weight ratio of isocyanate, graphite powder and polyether to 1:1, mix at 25°C, and mature for 40 minutes to obtain a density of 13kg / m 3 flame retardant polyurethane layer;

[0053] ④ Slice after foaming and aging, control the slice thickness to 15mm, and store for 24 hours after slicing;

[0054] (2) Compression molding:

[0055] ①After 24 hours of foaming and slicing, the ...

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Abstract

The invention relates to a multilayer-structure sound-proof and heat-proof cushion used for an automotive engine cabin and a manufacture method thereof. The sound-proof and heat-proof cushion is in a three-layer structure, wherein the upper surface layer and the lower surface layer are non-woven fabrics of which the density is 100g / cm<2>, and the middle layer is a flame-retardant polyurethane layer of which the density is 13-18kg / m<3>; graphite powder, polyether and isocyanate are mixed and sliced to obtain a flame-retardant polyurethane foaming layer; and then, the polyurethane foaming layer and the non-woven fabrics are placed in a forming die and are pressed to obtain the multilayer-structure sound-proof and heat-proof cushion used for the automotive engine cabin. Compared with the prior art, the multilayer-structure sound-proof and heat-proof cushion can play roles in absorbing and attenuating high-frequency and low-frequency noise so as to play a role in enhancing the integral sound-proof and noise-reduction effect. Compared with the existing structure, the multilayer-structure sound-proof and heat-proof cushion has the advantage that the weight of parts is lowered by 70%.

Description

technical field [0001] The invention relates to a sound-insulating and heat-insulating pad and a manufacturing method thereof, in particular to a multi-layer structure sound-insulating and heat-insulating pad for an automobile engine compartment and a manufacturing method thereof. Background technique [0002] At present, the dash panel in the engine compartment of the automobile industry mainly includes two structures: (1) Most of the parts are made of resin powder and glass fiber materials. Since the engine in the engine compartment will generate a lot of noise and high temperature when it is working, the parts made of the above-mentioned materials are heavy, the sound insulation and heat insulation effect is average, and the glass fiber has a great pollution to the environment. (2) Composite structure of resin powder+cotton fiber: heavy weight, high cost and complex process. Contents of the invention [0003] The objective of the present invention is exactly to provide...

Claims

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Application Information

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