CN202429144U

CN202429144U - Automobile novel sound insulation pad

Info

Publication number: CN202429144U
Application number: CN2011203241035U
Authority: CN
Inventors: 李海涛; 张志豪; 韩光明
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2011-08-31
Filing date: 2011-08-31
Publication date: 2012-09-12
Anticipated expiration: 2021-08-31

Abstract

The utility model relates to an insulating element used in a vehicle, especially to an automobile novel sound insulation pad which comprises an upper non-woven fabric layer (1) and an intermediate layer (2) located under the non-woven fabric layer (1) and possessing sound insulation and absorption effects, a lower non-woven fabric layer (3) being stitched under the intermediate layer (2). According to the technical scheme, stitching package is performed on two surfaces of the sound insulation pad by employing non-woven fabric layers, thus for storage, dust can be avoided from being pasted onto the sound insulation pad and applying installation effects between the sound insulation pad and vehicle sheet metal members can be raised.

Description

The novel automobile sound insulating pad

Technical field

The utility model relates to the insulating element that uses in a kind of vehicle, relates in particular to a kind of novel automobile sound insulating pad.

Background technology

Vehicle noise insulation pad is as one of major part of car noise isolation processing; Take advantage of to drive and have very important effect aspect the traveling comfort guaranteeing automobile; Car noise mainly is divided into engine noise, noise of air, tire noise and body structure noise etc.; Weaken reduction in order to make this noise can access actv., existing sound insulating pad adopts multiple-structure more, at the sound absorbing layer that needs to lay the sound isolating layer with soundproof effect of sound insulating pad on the vehicle body panel beating at sound insulation position or have sound-absorbing effect; Lay the layer of non-woven fabric layer on its surface then, realized the reduction noise result.

China utility model patent CN201395107Y discloses a kind of bonnet sound insulating pad, and it comprises pad, and pad is made up of sound isolating layer and sound absorbing layer; Sound isolating layer is arranged on the sound absorbing layer top, and the sound isolating layer upper surface is laid with nonwoven layer, and the employing of its structure has characteristics such as soundproof effect is good, product strength is high, simple installation; But this technical scheme is owing to adopt the single-layer nonwoven layer, and therefore, sound insulating pad is when depositing; Dust etc. can be stained with in the stratiform surface that nonwoven layer is not set; Make this stratiform surface when laying to the vehicle panel beating, cause the not firm phenomenon of maybe can't fitting of applying, though and this structure sound isolating layer and sound absorbing layer are set, its noise reduction is not good.

Summary of the invention

Be to solve the deficiency that exists in the prior art, the utility model provides a kind of and can avoid sticking glutinous dust when depositing and cause and the vehicle panel beating not firm novel automobile sound insulating pad of fitting, and its noise reduction is better.

For realizing above-mentioned purpose, the novel automobile sound insulating pad of the utility model comprises nonwoven layer and is positioned at the nonwoven layer interlayer below, that have sound insulation and sound absorption that pressing has following nonwoven layer below interlayer.

As the qualification to aforesaid way, described interlayer is the single stratiform that body insulation and sound absorption materials mix system.

As the qualification to the utility model, described interlayer is made up of sound isolating layer and sound absorbing layer pressing.

Say that further above-mentioned sound isolating layer is 1:1 with the thickness of sound absorbing layer ratio.

Adopt technique scheme, because two surfaces of sound insulating pad all adopt nonwoven layer to carry out the pressing packing, when having avoided depositing, dust is sticky on the sound insulating pad, has improved the applying of sound insulating pad and vehicle sheet metal component effect is installed; Interlayer adopts body insulation and sound absorption materials to mix the single stratiform of system, makes the better compactness of integral structure, and the probability that breaks away from each other between each layer reduces; And adopt sound isolating layer and sound absorbing layer pressing to form structure interlayer; Make noise can layering weaken, absorb, especially with the thickness of sound isolating layer and sound absorbing layer than being 1:1, when making whole neat appearance again and alleviating overall weight; Make sound absorption factor at 1000HZ>0.88; 2000HZ>0.99,4000HZ>0.99, sound-absorbing effect is more excellent.

Description of drawings

Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done further to specify:

Fig. 1 is the structural representation of the utility model embodiment one;

Fig. 2 is the structural representation of the utility model embodiment two.

Among the figure: 1, go up nonwoven layer; 2, interlayer; 21, sound isolating layer; 22, sound absorbing layer; 3, following nonwoven layer.

The specific embodiment

The novel automobile sound insulating pad that the utility model relates to; It mainly is being to adopt two-layer nonwoven layer and the interlayer structure between this two-layer nonwoven layer on the basis of existing technology on structure design, through concrete structrual description the utility model is elaborated as follows below:

Embodiment one

Know by shown in Figure 1; The novel automobile sound insulating pad that present embodiment relates to; Comprise nonwoven layer 1 and be positioned at interlayer 2 nonwoven layer 1 below, that have sound insulation and sound absorption; Pressing has following nonwoven layer 3 below interlayer 2, and wherein, interlayer 2 is the single stratiform that body insulation and sound absorption materials mix system.

In the present embodiment, body insulation adopts the semi-solid preparation felt, and sound absorption materials adopts glass wool, and the two is by weight 1:1 mixing aftershaping; The compression-molded structures pressing that whole sound insulating pad adopts press or has a tubular electric heating element forms, and is example with the compression-molded structures pressing, earlier upper mould is heated to 210 ± 10 ℃, and counterdie is heated to 230 ± 10 ℃; To descend nonwoven fabrics to complete earlier, put the interlayer of mixed-forming, put nonwoven fabrics at last; Carry out mold pressing, pressure is 20MPA, and the dwell time is 60S; The taking-up product is put to stock mould and is finalized the design after the die sinking, requires surfacing, smooth, corrugationless, and the steel deflection is arranged.

Embodiment two

Known that by shown in Figure 2 present embodiment and embodiment one are basic identical, difference is that interlayer 2 is made up of sound isolating layer 21 and sound absorbing layer 22 pressings; And sound isolating layer 21 is 1:1 with the thickness ratio of sound absorbing layer 22, and wherein sound isolating layer 21 adopts the semi-solid preparation felts, and sound absorbing layer adopts glass wool; In use, because the material fiber length of above-mentioned two-layer employing and performance are different, glass wool more can sound-absorbing; The semi-solid preparation felt can better sound-absorbing and sound insulation, can make sound isolating layer 21 be adjacent to the vehicle body sheet metal component, and sound absorbing layer 22 is pressed close to noise source (like driving engine); Adopt this occupation mode; After noise is partially absorbed by sound absorbing layer 22 earlier, by sound isolating layer 21 sound-absorbings and sound insulation, make noise reduction better again.

Claims

1. a novel automobile sound insulating pad comprises nonwoven layer (1) and is positioned at nonwoven layer (1) interlayer (2) below, that have sound insulation and sound absorption, it is characterized in that: in interlayer (2) below pressing following nonwoven layer (3) is arranged.

2. novel automobile sound insulating pad according to claim 1 is characterized in that: described interlayer (2) is made up of sound isolating layer (21) and sound absorbing layer (22) pressing.

3. novel automobile sound insulating pad according to claim 2 is characterized in that: described sound isolating layer (21) is 1:1 with the thickness ratio of sound absorbing layer (22).