CN207274003U - A kind of composite porous automotive interior roof of high sound absorption qualities - Google Patents
A kind of composite porous automotive interior roof of high sound absorption qualities Download PDFInfo
- Publication number
- CN207274003U CN207274003U CN201721333843.9U CN201721333843U CN207274003U CN 207274003 U CN207274003 U CN 207274003U CN 201721333843 U CN201721333843 U CN 201721333843U CN 207274003 U CN207274003 U CN 207274003U
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- glued membrane
- punching
- sound absorption
- aperture
- glass mat
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Abstract
The utility model discloses a kind of composite porous automotive interior roof of high sound absorption qualities, its main feature is that, by lower non-woven fabrics（8）, lower punching glued membrane（7）, lower glass mat（6）, polyurethane foam board（5）, upper glass mat（4）, upper punching glued membrane（3）, upper non-woven fabrics（2）, fabric（1）Bonding forms from bottom to top；The lower punching glued membrane（7）With upper punching glued membrane（3）There is circular protrusions aperture on surface（9）；The circular protrusions aperture（9）30 60 μm of diameter, distribution density are 70,000 90000/square meter；The circular protrusions aperture（9）Raised one is facing to glass mat；Ceiling is installed to in-car, effectively increases the sound absorption qualities of ceiling, reduces interior space noise, driver can be made more intuitively to experience the comfort of motor space in driving procedure.
Description
Technical field：
Technical field of automotive trim is the utility model is related to, specifically a kind of high sound absorption qualities are composite porous
Automotive interior roof.
Background technology：
At present, existing automotive interior roof is by non-woven fabrics, glass mat, polyurethane foam board, glass mat, nothing
Woven fabric, fabric are bonded form in sequence, since ceiling area is big, have the function that to the sound absorption qualities of internal car noise it is important,
The sound absorption qualities of automotive interior roof directly determine the control effect of internal car noise.
Common ceiling with wet method, polyurethane sheet structure used is cellular semi-rigid foam plate, since density is low, percent opening
Height, causes longer wavelengths of sound wave to cannot pass through the energy expenditure of polyurethane hole wall, and shortwave directly through polyurethane foam board
Long acoustic wave energy consumption is not complete, phenomena such as causing echo in cockpit, reverberation.
Utility model content：
The purpose of the utility model is to overcome the deficiency of above-mentioned prior art, and it is porous compound to provide a kind of high sound absorption qualities
The automotive interior roof of material；Main existing automotive interior roof can not meet product to full frequency band（400-10000HZ）Height is inhaled
The requirement of sound performance.
The technical solution of utility model is：A kind of composite porous automotive interior roof of high sound absorption qualities, its is special
Part is, by lower non-woven fabrics, lower punching glued membrane, lower glass mat, polyurethane foam board, upper glass mat, upper punching
Glued membrane, upper non-woven fabrics, fabric are bonded form from bottom to top；The lower punching glued membrane and upper punching film surface have the circular protrusions small
Hole；30-60 μm of the circular protrusions hole diameter, distribution density are 70000-90000/square meter；The circular protrusions
Aperture it is raised one facing to glass mat.
Further, the punching glued membrane is the polyolefin film of grammes per square metre 40-80g/ square meters.
The composite porous automotive interior roof of a kind of high sound absorption qualities described in the utility model, by punching glued membrane
Several upper circular protrusions apertures are combined with glass mat, polyurethane foam board, make original completely unlimited polyurethane bee
Nest unit is changed into open middle, the porose semienclosed cellular unit in both sides, when Acoustic Wave Propagation is to polyurethane foam board, sound
Ripple enters polyurethane foam intralamellar part from aperture, due to punch glued membrane stop, sound wave can in cellular unit multiple reflections
The energy expenditure of sound wave is carried out, and effectively reduces and is reflected back the long sound wave of cockpit and short sound wave, greatly reduces driving
Noise in cabin.
A kind of composite porous automotive interior roof of high sound absorption qualities described in the utility model and prior art phase
Than with following good effect, 1, using punching glued membrane, increase while original polyurethane foam board open type honeycomb is kept
The semiclosed property in edge of polyurethane foam board, improves and pushes up by punching glued membrane and glass mat, the combination of polyurethane foam board
The sound absorption qualities of canopy, make ceiling have high sound absorption qualities；2nd, ceiling is installed to automotive interior, has very to the noise absorbent of cockpit
Big raising, hence it is evident that improve the comfort of environment inside car.
Brief description of the drawings：
Fig. 1 is the configuration schematic diagram of the utility model；
Fig. 2 is circular protrusions small structure schematic diagram on the punching glued membrane of the utility model；
Fig. 3 is that sound wave propagates diagram intention in polyurethane foam board.
Embodiment：
For a better understanding and implementation, providing specific embodiment below in conjunction with the accompanying drawings describes the utility model in detail；Institute
It is only used for explaining the utility model for embodiment, is not intended to limit the scope of the utility model.
Embodiment 1, referring to Fig. 1,2, selects the polyolefin film of grammes per square metre 40-80g/ square meters as punching glue according to the design needs
It is circular protrusions aperture greatly that film, i.e., upper punching glued membrane 3 and lower punching glued membrane 7, upper punching glued membrane 3 and 7 surface of lower punching glued membrane, which have,
9,30-60 μm of 9 diameter of circular protrusions aperture, distribution density is 70000-90000/square meter；By lower non-woven fabrics 8, lower punching glue
Film 7, lower glass mat 6, polyurethane foam board 5, upper glass mat 4, upper punching glued membrane 3, upper non-woven fabrics 2, fabric 1 are under
And upper placement, circular protrusions aperture 9 is raised on lower punching glued membrane 7 one is facing to lower glass mat 6, on upper punching glued membrane 3
Circular protrusions aperture 9 it is raised one facing to upper glass mat 4；By molding, eight layer materials are bonded together, form this
A kind of composite porous automotive interior roof of high sound absorption qualities of utility model.
A kind of composite porous automotive interior roof of high sound absorption qualities of the utility model, referring to Fig. 3, circle in use
The one of shape protrusion aperture protrusion makes original open polyurethane cellular unit be changed into semiclosed property bee facing to glass mat
Nest unit, when sound wave passes to punching glued membrane, sound wave enters glass mat and polyurethane foam board by aperture, and sound wave is in poly- ammonia
Multiple reflections consumed energy is carried out in ester cystosepiment, and greatly reduces the acoustic wave energy for returning to cockpit, so as to form high suction
Sound performance.
Claims (2)
1. the composite porous automotive interior roof of a kind of high sound absorption qualities, it is characterised in that by lower non-woven fabrics（8）, lower beat
Hole glued membrane（7）, lower glass mat（6）, polyurethane foam board（5）, upper glass mat（4）, upper punching glued membrane（3）, upper nothing
Woven fabric（2）, fabric（1）Bonding forms from bottom to top；The lower punching glued membrane（7）With upper punching glued membrane（3）Surface has circular convex
Play aperture（9）；The circular protrusions aperture（9）30-60 μm of diameter, distribution density are 70000-90000/square meter；It is described
Circular protrusions aperture（9）Raised one is facing to glass mat.
A kind of 2. composite porous automotive interior roof of high sound absorption qualities according to claim 1, it is characterised in that
The punching glued membrane is the polyolefin film of grammes per square metre 40-80g/ square meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721333843.9U CN207274003U (en) | 2017-10-17 | 2017-10-17 | A kind of composite porous automotive interior roof of high sound absorption qualities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721333843.9U CN207274003U (en) | 2017-10-17 | 2017-10-17 | A kind of composite porous automotive interior roof of high sound absorption qualities |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207274003U true CN207274003U (en) | 2018-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721333843.9U Active CN207274003U (en) | 2017-10-17 | 2017-10-17 | A kind of composite porous automotive interior roof of high sound absorption qualities |
Country Status (1)
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| CN (1) | CN207274003U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107599522A (en) * | 2017-10-17 | 2018-01-19 | 烟台正海合泰科技股份有限公司 | A kind of composite porous automotive interior roof of high sound absorption qualities |
-
2017
- 2017-10-17 CN CN201721333843.9U patent/CN207274003U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107599522A (en) * | 2017-10-17 | 2018-01-19 | 烟台正海合泰科技股份有限公司 | A kind of composite porous automotive interior roof of high sound absorption qualities |
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