CN112092844A - Light wide-temperature-range layered constraint damping noise reduction profile and preparation method thereof - Google Patents
Light wide-temperature-range layered constraint damping noise reduction profile and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 10
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/06—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/18—Layered products comprising a layer of natural or synthetic rubber comprising butyl or halobutyl rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
- B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
- B61D17/18—Internal lining, e.g. insulating
- B61D17/185—Internal lining, e.g. insulating for sound insulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Laminated Bodies (AREA)
Abstract
The invention belongs to the technical field of sectional materials, and provides a light wide-temperature-range layered constraint damping noise reduction sectional material and a preparation method thereof, wherein the sectional material comprises an aluminum plate or an aluminum sectional material, and IIR/EP layered constraint damping structures are respectively adhered to the upper surface and the lower surface of the aluminum plate or the aluminum sectional material; the layered constraint damping structure comprises N layers which are composed of IIR layers and EP layers, wherein N is an even number which is more than or equal to 4. The invention designs an IIR/EP layered constraint damping structure, which is compounded with a profile structure, so that the light wide-temperature-range layered constraint damping noise reduction profile is wide in applicable effective temperature range, the sound insulation of the profile is effectively improved, the sound radiation of the profile is reduced, the mass of the profile is reduced, and the noise reduction design of the light structure is facilitated.
Description
Technical Field
The invention relates to the technical field of sectional materials, in particular to a light wide-temperature-range layered constraint damping noise reduction sectional material and a preparation method thereof.
Background
The rail transit is a major artery of national economic construction, a national key infrastructure and a significant civil engineering, is one of the backbone and main transportation modes of a comprehensive transportation system, and has a very important position and effect in the national economic and social development. With the continuous improvement of train running speed and the increasing complexity of operation environment, vibration noise is taken as a core scientific problem and becomes a key factor for restricting the 'green environmental protection' and 'sustainable development' of rail transit.
The section bar is a main body structure of a rail transit vehicle body and plays an important role in controlling vibration noise. How to improve the sound insulation of the sectional material and reduce the vibration sound radiation of the sectional material has important significance for controlling the vehicle noise. Damping treatment is one of the most widely used and effective measures for reducing vibration and noise of the section bars. On one hand, the common water-based damping coating has higher density, and can obviously increase the mass of the section bar, which is contradictory to the light-weight design goal of vehicles; on the other hand, the region of China is wide, the temperature difference between the south and the north is extremely large, and the general damping material is difficult to keep high damping performance in a wider temperature range (such as minus 40 ℃ to 50 ℃), so that the environmental application adaptability is poor.
In the prior art, the patent name is a composite layer structure of a high and cold motor train unit body (patent publication number: CN203739894U), and at least the following defects exist:
(1) the device is only suitable for low-temperature environment, and the effective temperature range is too narrow;
(2) the traditional 'one-layer damping layer and one-layer constraint layer' constraint damping structure is adopted, and the damping is low;
(3) the whole quality of the actual structure is increased, and the design of light structure is not facilitated.
Disclosure of Invention
In order to solve the technical problem, the invention provides a light wide-temperature-range layered constraint damping noise reduction profile for a railway vehicle.
On one hand, the invention provides a light wide-temperature-range layered constraint damping noise reduction section bar, which comprises an aluminum plate or an aluminum section bar;
an IIR/EP layered constraint damping structure is respectively adhered to the upper surface and the lower surface of the aluminum plate or the aluminum profile;
the layered constraint damping structure comprises N layers, wherein the N layers are composed of IIR (Butyl rubber) layers and EP (Epoxy resin) layers, and N is an even number which is more than or equal to 4.
Preferably, N is 8.
Preferably, a first IIR layer is adhered to the upper surface of the aluminum plate or the aluminum profile, and a first EP layer is compounded on the first IIR layer;
compositing a second IIR layer over said first EP layer, compositing a second EP layer over said second IIR layer;
compositing a third IIR layer over said second EP layer, compositing a third EP layer over said third IIR layer;
and compounding a fourth IIR layer on the third EP layer, and compounding a fourth EP layer on the fourth IIR layer.
Preferably, a fifth IIR layer is adhered to the lower surface of the aluminum plate or the aluminum profile, and a fifth EP layer is compounded below the fifth IIR layer;
compounding a sixth IIR layer below the fifth EP layer, and compounding a sixth EP layer below the sixth IIR layer;
compounding a seventh IIR layer below the sixth EP layer, and compounding a seventh EP layer below the seventh IIR layer;
and compounding an eighth IIR layer below the seventh EP layer, and compounding an eighth EP layer below the eighth IIR layer.
Preferably, the layer thickness ratio of the IIR layer to the EP layer is 1-3: 1 to 3.
Preferably, the total thickness of the IIR/EP layered constraint damping structure is 2-5 mm.
On one hand, the invention provides a preparation method of a light wide-temperature-range layered constraint damping noise reduction section, which comprises the following steps:
step one, crushing 100phr of IIR raw rubber by using a mixing roll for a first preset time;
secondly, adding 100-300 phr of PIB, HDCPD and CaCO into the mixing roll3Mixing the raw rubber with the crushed IIR raw rubber at a first preset temperature for a second preset time;
thirdly, placing the mixed IIR on a hot-pressing forming machine to be hot-pressed for a third preset time under the first preset condition;
step four, carrying out cold pressing treatment on the IIR subjected to the hot pressing treatment in the step three under a second preset condition;
fifthly, shearing the IIR obtained after the cold treatment in the step four to obtain an IIR with a single-layer structure;
sixthly, preparing an N-layer IIR/EP layered constraint damping structure by utilizing the self-adhesiveness of the IIR, wherein N is an even number which is more than or equal to 4;
and step seven, adhering the N layers of IIR/EP layered constraint damping structures prepared in the step six to the sectional material to obtain the light wide-temperature-range layered constraint damping noise reduction sectional material.
Preferably, the mixer is preheated according to a third preset condition before the first step.
Preferably, the N-layer IIR/EP layered constraint damping structure comprises 8 layers of IIR/EP.
Preferably, the total thickness of the IIR/EP layer-shaped constrained damping structure of the N layers is 2-5 mm, and the layer thickness ratio of the IIR layer to the EP layer is 1-3: 1 to 3.
Has the advantages that:
the invention provides a light wide-temperature-range layered constraint damping noise reduction section, which designs an IIR/EP layered constraint damping structure, and combines the IIR/EP layered constraint damping noise reduction section with a section structure, so that the light wide-temperature-range layered constraint damping noise reduction section has a wide applicable effective temperature range, the sound insulation of the section is effectively improved, the sound radiation of the section is reduced, the quality of the section is reduced, and the light-weight noise reduction design of the structure is favorably realized.
Drawings
1. Fig. 1 is a schematic structural diagram of a light wide-temperature-range layered constrained damping noise reduction profile provided in an embodiment of the present invention;
2. fig. 2 is a schematic flow chart of a method for manufacturing a light wide-temperature-range layered constrained damping noise reduction profile according to an embodiment of the present invention.
Best mode for carrying out the invention
In order to make the light wide-temperature range layered constraint damping noise reduction profile and the preparation method thereof provided by the present invention more clearly understood by those skilled in the art, the following detailed description will be made with reference to the accompanying drawings.
As shown in fig. 1, the invention provides a light wide-temperature-range layered constraint damping noise reduction section, which specifically comprises an aluminum plate or aluminum profile 9;
an IIR/EP layered constraint damping structure 100 is respectively adhered to the upper surface and the lower surface of the aluminum plate or the aluminum profile 9;
the layered constrained damping structure 100 includes N layers, which are formed of an IIR layer and an EP layer, where N is an even number equal to or greater than 4.
N ═ 8, that is, the light wide temperature range layered restraint damping noise reduction section bar is adhered with the IIR/EP layered restraint damping structure 100 containing 8 IIR/EP layers on the upper surface and the lower surface of the aluminum plate or aluminum section bar 9, specifically:
adhering a first IIR layer 1 to the upper surface of the aluminum plate or the aluminum profile 9, and compounding a first EP layer 2 on the first IIR layer 1;
compositing a second IIR layer 3 over said first EP layer 2 and a second EP layer 4 over said second IIR layer 3;
compositing a third IIR layer 5 over said second EP layer 4, compositing a third EP layer 6 over said third IIR layer 5;
a fourth IIR layer 7 is laminated on the third EP layer 6, and a fourth EP layer 8 is laminated on the fourth IIR layer 7.
Preferably, a fifth IIR layer 10 is adhered to the lower surface of the aluminum plate or the aluminum profile 9, and a fifth EP layer 11 is compounded below the fifth IIR layer 10;
compounding a sixth IIR layer 12 below the fifth EP layer 11, and compounding a sixth EP layer 13 below the sixth IIR layer 12;
compounding a seventh IIR layer 14 under the sixth EP layer 13, and compounding a seventh EP layer 15 under the seventh IIR layer 14;
an eighth IIR layer 16 is combined below the seventh EP layer 15, and an eighth EP layer 17 is combined below the eighth IIR layer 16.
Preferably, the layer thickness ratio of the IIR layer to the EP layer is 1-3: 1 to 3.
Preferably, the total thickness of the IIR/EP layered constraint damping structure is 2-5 mm.
For example, when N is 8, that is, the layered constraint damping structure 100 provided in the embodiment of the present invention has 8 layers, each including 4 IIR layers and 4 EP layers, where the thickness of each IIR layer is 0.25mm, the thickness of each EP layer is 0.25mm, and the layer thickness ratio of the two layers is 1:1, the total thickness of the layered restraining and damping structure 100 is 2 mm. Of course, the above description is not intended to limit the embodiments of the present invention.
As shown in fig. 2, an embodiment of the present invention provides a preparation method of a light wide-temperature-range layered constrained damping noise reduction profile, specifically including the following steps:
step one, crushing 100phr of IIR raw rubber by using a mixing roll for a first preset time, wherein the first preset time can be set according to actual needs, such as 10 min;
secondly, adding 100-300 phr of PIB, HDCPD and CaCO into the mixing roll3Mixing the raw rubber and the crushed IIR raw rubber at a first preset temperature for a second preset time, wherein the first preset temperature can be set according to actual needs, such as 130 ℃, and the second preset time can be set according to actual needs, such as 120 min;
thirdly, placing the mixed IIR on a hot-pressing forming machine, and hot-pressing the mixed IIR for a third preset time under a first preset condition, wherein the first preset condition can be set according to actual needs, such as 90 ℃ and 10MPa, and the third preset time can be set according to actual needs, such as 5 min;
step four, performing cold pressing treatment on the IIR subjected to the hot pressing treatment in the step three under a second preset condition, wherein the second preset condition can be set according to actual needs, such as cold pressing to room temperature under 10 MPa;
fifthly, shearing the IIR obtained after the cold treatment in the step four to obtain an IIR with a single-layer structure;
sixthly, preparing an N-layer IIR/EP layered constraint damping structure by utilizing the self-adhesiveness of the IIR, wherein N is an even number which is more than or equal to 4;
and step seven, adhering the N layers of IIR/EP layered constraint damping structures prepared in the step six to the sectional material to obtain the light wide-temperature-range layered constraint damping noise reduction sectional material.
Preferably, the mixer is preheated according to a third preset condition before the step one, and the third preset condition can be set according to actual needs, for example, the mixer is preheated at 130 ℃ for 10 min.
Preferably, the N-layer IIR/EP layered constraint damping structure comprises 8 layers of IIR/EP.
Preferably, the total thickness of the IIR/EP layer-shaped constrained damping structure of the N layers is 2-5 mm, and the layer thickness ratio of the IIR layer to the EP layer is 1-3: 1 to 3.
The specific implementation mode can be as follows:
(1) preheating a mixing roll at 130 ℃ for 10min, cutting 100phr (parts per grains of rubber) IIR raw rubber with the content of IIR raw rubber into sheets, putting the sheets into the mixing roll and crushing for 10 min;
(2) 100phr of PIB (Polyisobutylene), HDCPD (hydrogenated dicyclopentadiene resin) and 200phr of CaCO3(Calcium carbonate) was added to the mixer and mixed at 130 ℃ for 120 min;
(3) weighing a certain amount of mixed IIR, placing the IIR on a hot-press forming machine, hot-pressing for 5min at 90 ℃ and 10MPa, and then cold-pressing to room temperature under the same pressure for forming, so that the light wide-temperature-range layered constraint damping noise reduction profile is wide in applicable effective temperature range;
(4) setting the total thickness of IIR/EP to be 2mm, the total layer number to be 8 layers and the layer thickness ratio to be 1:1, cutting IIR and EP with the single-layer thickness of 0.25mm, and preparing a multi-layer IIR/EP constrained damping structure by utilizing the self-adhesion type of the IIR;
(5) prefabricating a section bar needing noise reduction treatment, wherein the thickness of an upper panel and a lower panel of the section bar is reduced by 2mm compared with the original structure;
(6) and (3) sticking the prepared layered IIR/EP constrained damping structure to the profile processed in the step (5) by using the self-adhesion of the IIR to obtain the light wide-temperature-range layered constrained damping noise reduction profile.
Simulation calculation analysis results show that when the original thickness of the upper and lower panels of the profile is 3mm, the whole thickness of the profile is kept unchanged, the upper and lower panels are thinned by 2mm, and then the light wide-temperature-range layered constraint damping structure (2mm) is adhered to the upper and lower surfaces of the profile, so that the sound insulation quantity of the profile can be improved by 3.0dB, the sound radiation of the profile can be reduced by 2.7dB, and the mass of the profile can be reduced by 14.4% under the condition that the total thickness is unchanged.
The foregoing detailed description of the embodiments of the present invention has been presented for the purpose of illustrating the principles and implementations of the present invention, and the description of the embodiments is only provided to assist understanding of the core concepts of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. The utility model provides a wide temperature domain stratiform restraint damping of light section bar of making an uproar falls, includes aluminum plate or aluminium alloy, its characterized in that:
an IIR/EP layered constraint damping structure is respectively adhered to the upper surface and the lower surface of the aluminum plate or the aluminum profile;
the layered constraint damping structure comprises N layers which are composed of IIR layers and EP layers, wherein N is an even number which is more than or equal to 4.
2. The lightweight wide temperature range layered constrained damping noise reduction profile of claim 1, wherein N-8.
3. The light wide-temperature-range layered constrained damping noise reduction profile according to claim 2, wherein:
adhering a first IIR layer to the upper surface of the aluminum plate or the aluminum profile, and compounding a first EP layer on the first IIR layer;
compositing a second IIR layer over said first EP layer, compositing a second EP layer over said second IIR layer;
compositing a third IIR layer over said second EP layer, compositing a third EP layer over said third IIR layer;
and compounding a fourth IIR layer on the third EP layer, and compounding a fourth EP layer on the fourth IIR layer.
4. The light wide temperature range layered constrained damping noise reduction profile according to claim 2 or 3, characterized in that:
adhering a fifth IIR layer to the lower surface of the aluminum plate or the aluminum profile, and compounding a fifth EP layer below the fifth IIR layer;
compounding a sixth IIR layer below the fifth EP layer, and compounding a sixth EP layer below the sixth IIR layer;
compounding a seventh IIR layer below the sixth EP layer, and compounding a seventh EP layer below the seventh IIR layer;
and compounding an eighth IIR layer below the seventh EP layer, and compounding an eighth EP layer below the eighth IIR layer.
5. The light wide-temperature-range layered constraint damping noise reduction profile as claimed in claim 1, wherein the layer thickness ratio of the IIR layer to the EP layer is 1-3: 1 to 3.
6. The light wide-temperature-range layered constraint damping noise reduction profile as claimed in claim 1, wherein the total thickness of the IIR/EP layered constraint damping structure is 2-5 mm.
7. A preparation method of a light wide-temperature-range layered constraint damping noise reduction section is characterized by comprising the following steps:
step one, crushing 100phr of IIR raw rubber by using a mixing roll for a first preset time;
secondly, adding 100-300 phr of PIB, HDCPD and CaCO into the mixing roll3Mixing the raw rubber with the crushed IIR raw rubber at a first preset temperature for a second preset time;
thirdly, placing the mixed IIR on a hot-pressing forming machine to be hot-pressed for a third preset time under the first preset condition;
step four, carrying out cold pressing treatment on the IIR subjected to the hot pressing treatment in the step three under a second preset condition;
fifthly, shearing the IIR obtained after the cold treatment in the step four to obtain an IIR with a single-layer structure;
sixthly, preparing an N-layer IIR/EP layered constraint damping structure by utilizing the self-adhesiveness of the IIR, wherein N is an even number which is more than or equal to 4;
and step seven, adhering the N layers of IIR/EP layered constraint damping structures prepared in the step six to the sectional material to obtain the light wide-temperature-range layered constraint damping noise reduction sectional material.
8. The method for preparing a light-weight wide-temperature-range layered constraint damping noise reduction profile as claimed in claim 6, wherein the mixer is preheated according to a third preset condition before the first step.
9. The preparation method of the light wide-temperature-range layered constraint damping noise reduction profile according to claim 7 or 8, wherein the N-layer IIR/EP layered constraint damping structure comprises 8 layers of IIR/EP.
10. The preparation method of the light wide-temperature-range layered constraint damping noise reduction profile as claimed in claim 7 or 8, wherein the total thickness of the N layers of IIR/EP layered constraint damping structure is 2-5 mm, and the layer thickness ratio of the IIR layer to the EP layer is 1-3: 1 to 3.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114015377A (en) * | 2021-11-19 | 2022-02-08 | 四川大学 | Wide-temperature-range gradient multilayer self-adhesion type constrained damping material and preparation method thereof |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114015377A (en) * | 2021-11-19 | 2022-02-08 | 四川大学 | Wide-temperature-range gradient multilayer self-adhesion type constrained damping material and preparation method thereof |
| CN114015377B (en) * | 2021-11-19 | 2022-08-19 | 四川大学 | Wide-temperature-range gradient multilayer self-adhesion type constrained damping material and preparation method thereof |
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