CN219903644U - Composite material covering piece with foam sandwich structure - Google Patents
Composite material covering piece with foam sandwich structure Download PDFInfo
- Publication number
- CN219903644U CN219903644U CN202322367640.3U CN202322367640U CN219903644U CN 219903644 U CN219903644 U CN 219903644U CN 202322367640 U CN202322367640 U CN 202322367640U CN 219903644 U CN219903644 U CN 219903644U
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- CN
- China
- Prior art keywords
- foam sandwich
- density foam
- low
- flame
- sandwich
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- 239000006260 foam Substances 0.000 title claims abstract description 26
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 239000004620 low density foam Substances 0.000 claims abstract description 33
- 239000003063 flame retardant Substances 0.000 claims abstract description 32
- 239000004619 high density foam Substances 0.000 claims abstract description 30
- 239000010410 layer Substances 0.000 claims abstract description 29
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 22
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000004593 Epoxy Substances 0.000 claims abstract description 19
- 239000007787 solid Substances 0.000 claims abstract description 17
- 239000003365 glass fiber Substances 0.000 claims abstract description 10
- 239000011229 interlayer Substances 0.000 claims abstract description 10
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 9
- 239000004917 carbon fiber Substances 0.000 claims abstract description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 10
- 239000011180 sandwich-structured composite Substances 0.000 claims 6
- 239000002994 raw material Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000003892 spreading Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- -1 flame-retardant phenolic aldehyde Chemical class 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Abstract
The utility model discloses a composite material covering piece with a foam sandwich structure, which is characterized in that a composite layer is arranged between an inner skin and an outer skin; the composite layer comprises a solid interlayer at the periphery and a high-density foam sandwich and a low-density foam sandwich which are arranged at intervals inside; the high-density foam sandwich surrounds the low-density foam sandwich at the periphery, and the high-density foam sandwich forms a transverse middle reinforcing belt and a longitudinal middle reinforcing belt inside the low-density foam sandwich, and the low-density foam sandwich is divided into a plurality of square areas through the crossed arrangement of the middle reinforcing belts. The solid interlayer, the inner skin and the outer skin adopt a plurality of layers of flame-retardant epoxy glass fiber prepregs or flame-retardant epoxy carbon fiber prepregs. The high-density foam sandwich and the low-density foam sandwich are flame-retardant phenolic foam boards. The utility model has reasonable structure, and can meet the requirements of the rail transit vehicle on light weight, high strength and flame retardance of the interior covering piece on the basis of reducing unit price and improving integral strength by selecting and improving the raw materials.
Description
Technical Field
The utility model belongs to the technical field of composite material products, and particularly relates to a light flame-retardant sandwich structure composite material product.
Background
In many conventional rail transit vehicles, an aluminum alloy shell welded structure is required to be thickened or reinforced in the whole structure when welding, but the strength improvement mode is required to take a weight limit parameter as a design standard, namely, the whole weight of the material is controlled in unit volume.
In order to achieve the purpose of reducing the weight of the rail transit vehicle, the weight of the vehicle framework is reduced, meanwhile, the vehicle framework can be started from a covering part product, the existing improvement mode is two modes of material improvement or strength improvement, but the material improvement directly affects the material cost and manufacturing unit price of the whole product, and the structural improvement can restrict the manufacturing flow and efficiency of the product.
Therefore, aiming at the defects that the prior product is improved in the product material, the welding is difficult, the manufacturing efficiency is influenced, and the flame retardant efficiency of the improved product cannot be improved, the prior product is structurally improved, and is used as a research and development unit of the material industry, how to design a foam sandwich structure material with light material, easy forming and low unit price, so that the strength of the foam sandwich structure material can be effectively improved, and the manufacturing unit price can be reduced, which is a technical problem to be solved by a person in the art.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides the foam sandwich structure composite material covering part, which can meet the requirements of rail transit vehicles on high strength and high flame retardant coefficient of the interior covering part by adopting a combined structure design for raw materials.
In order to achieve the technical purpose, the utility model adopts the following scheme: a composite material covering piece with a foam sandwich structure comprises an inner skin and an outer skin, wherein a composite layer is arranged between the inner skin and the outer skin; the composite layer comprises a solid interlayer at the periphery and a high-density foam sandwich and a low-density foam sandwich which are arranged at intervals in the composite layer; the high density foam core peripherally surrounds the low density foam core.
The high-density foam sandwich is characterized in that a transverse middle reinforcing belt and a longitudinal middle reinforcing belt are formed inside the low-density foam sandwich, and the low-density foam sandwich is divided into a plurality of square areas through the cross arrangement of the middle reinforcing belts.
The inner skin and the outer skin adopt a plurality of layers of flame-retardant epoxy glass fiber prepregs or flame-retardant epoxy carbon fiber prepregs.
The high-density foam sandwich is a flame-retardant phenolic foam board, and the density of the high-density foam sandwich is 800 kg/m.
The low-density foam sandwich is a flame-retardant phenolic foam board, and the density of the low-density foam sandwich is 210 kg/m.
The solid interlayer is a plurality of layers of flame-retardant epoxy glass fiber prepregs or flame-retardant epoxy carbon fiber prepregs.
The solid sandwich layer has a width of 10mm, a thickness equal to that of the high-density foam sandwich layer and the low-density foam sandwich layer, and is distributed on the periphery of the high-density foam sandwich layer and clamped between the inner skin and the outer skin.
Preferably, the product is produced and manufactured by an autoclave molding process, and the mold is a steel mold. And solidifying and forming the product in a high-temperature and high-pressure environment in the autoclave.
The utility model has the beneficial effects that: according to the utility model, the inner skin and the outer skin are arranged, and a composite layer is arranged between the inner skin and the outer skin; the composite layer comprises a solid interlayer at the periphery and a high-density foam sandwich and a low-density foam sandwich which are arranged at intervals inside; the high-density foam sandwich surrounds the low-density foam sandwich at the periphery, and the high-density foam sandwich forms a transverse middle reinforcing belt and a longitudinal middle reinforcing belt inside the low-density foam sandwich, and the low-density foam sandwich is divided into a plurality of square areas through the crossed arrangement of the middle reinforcing belts. The solid interlayer, the inner skin and the outer skin adopt a plurality of layers of flame-retardant epoxy glass fiber prepregs or flame-retardant epoxy carbon fiber prepregs. The high-density foam sandwich and the low-density foam sandwich are flame-retardant phenolic aldehyde foaming foam boards; after the structure is improved, the utility model has reasonable structure, and can meet the requirements of the rail transit vehicle on light weight, high strength and flame retardance of the interior covering piece on the basis of reducing unit price and improving integral strength by selecting raw materials and improving the structure.
Drawings
FIG. 1 is a schematic perspective view of the present utility model;
FIG. 2 is a schematic diagram of the internal structure of the present utility model;
FIG. 3 is a schematic view of the internal assembly structure of the present utility model;
FIG. 4 is an enlarged schematic view of the structure of the area A in FIG. 2;
FIG. 5 is an enlarged schematic view of the structure of the area B in FIG. 3;
reference numerals illustrate:
1. solid sandwich, 10, solid sandwich storage tank, 2, high density foam sandwich, 20, high density foam sandwich storage tank, 3, low density foam sandwich, 30, low density foam sandwich storage tank, 4, transverse reinforcement band, 5, longitudinal reinforcement band, 6, outer skin, 7, inner skin.
Detailed Description
The utility model is further illustrated by the following examples, which are given by way of illustration of specific construction and form of the utility model as shown in the accompanying drawings:
the composite covering piece with the foam sandwich structure comprises an inner covering 7 and an outer covering 6, wherein a composite layer is arranged between the inner covering 7 and the outer covering 6; the composite layer comprises a solid interlayer 1 at the periphery, a high-density foam sandwich 2 and a low-density foam sandwich 3 which are arranged at intervals in the composite layer; the high density foam core 2 peripherally encloses the low density foam core 3.
In order to further improve the overall strength, the high-density foam sandwich 2 forms a transverse reinforcing belt 4 and a longitudinal reinforcing belt 4 inside the low-density foam sandwich 3, and the transverse reinforcing belt 4 and the longitudinal reinforcing belt 4 are arranged in a crossing manner to divide the low-density foam sandwich 3 into a plurality of square areas. After the structure is arranged, the transverse reinforcing belt 4 and the longitudinal reinforcing belt 4 are arranged in a crossing way to form a framework structure.
Furthermore, the inner skin 7 and the outer skin 6 are made of a plurality of layers of flame-retardant epoxy glass fiber prepregs or flame-retardant epoxy carbon fiber prepregs, and are arranged on the upper surface and the lower surface of the composite layer in a bonding mode.
The high-density foam sandwich 2 is a flame-retardant phenolic foam board, and the density of the high-density foam sandwich is 800 kg/m; the low-density foam sandwich 3 is a flame-retardant phenolic foam board, and the density of the low-density foam sandwich is 4210 kg/m. The solid interlayer 5 is a plurality of layers of flame-retardant epoxy glass fiber prepregs or flame-retardant epoxy carbon fiber prepregs.
When the product is molded, a spreading chart of the spreading is generated according to the 3d data of the product, and the spreading design is carried out according to the drawing, wherein the specific spreading is as follows: the inner skin 7 and the outer skin 6 are respectively 4 layers of epoxy glass fiber twill prepregs, a flame-retardant phenolic foam board with the density of 800kg/m is sheared into a transverse reinforcing band 4 and a longitudinal reinforcing band 4 and are arranged in a crossing way to form a framework structure, a circle of flame-retardant phenolic foam board with the density of 800kg/m is wound around the periphery of the whole framework structure to form a high-density foam sandwich 2, a square area formed by the transverse reinforcing band 4 and the longitudinal reinforcing band 4 in a crossing way is filled with the flame-retardant phenolic foam board with the tiling density of 800kg/m, after tiling is finished, a circle of solid sandwich 1 consisting of 5 layers of flame-retardant epoxy glass fiber prepregs or flame-retardant epoxy carbon fiber prepregs is paved on the periphery, the width of the solid sandwich is 10mm, the thickness of the solid sandwich is equal to the thickness of the high-density foam sandwich 2 and the low-density foam sandwich 3, and then the composite layers are clamped between the inner skin 7 and the outer skin 6.
And (3) establishing a vacuum system, moving the tiled product and the mould into an autoclave, and curing the product at high temperature and high pressure in the autoclave. And cutting burrs of the product after molding to obtain the final required product.
After the structure is improved, the utility model can meet the requirements of the rail transit vehicle on light weight, high strength and flame retardance of the interior covering piece on the basis of reducing unit price and improving integral strength by selecting raw materials and improving the structure.
Claims (7)
1. The utility model provides a foam sandwich structure combined material covering, its characterized in that: the composite material comprises an inner skin and an outer skin, wherein a composite layer is arranged between the inner skin and the outer skin; the composite layer comprises a solid interlayer at the periphery and a high-density foam sandwich and a low-density foam sandwich which are arranged at intervals in the composite layer; the high density foam core peripherally surrounds the low density foam core.
2. A foam sandwich structured composite overlay as claimed in claim 1 wherein: the high-density foam sandwich is characterized in that a transverse middle reinforcing belt and a longitudinal middle reinforcing belt are formed inside the low-density foam sandwich, and the low-density foam sandwich is divided into a plurality of square areas through the cross arrangement of the middle reinforcing belts.
3. A foam sandwich structured composite cover as claimed in claim 1 or claim 2, wherein: the inner skin and the outer skin adopt a plurality of layers of flame-retardant epoxy glass fiber prepregs or flame-retardant epoxy carbon fiber prepregs.
4. A foam sandwich structured composite cover as claimed in claim 1 or claim 2, wherein: the high-density foam sandwich is a flame-retardant phenolic foam board, and the density of the high-density foam sandwich is 800 kg/m.
5. A foam sandwich structured composite cover as claimed in claim 1 or claim 2, wherein: the low-density foam sandwich is a flame-retardant phenolic foam board, and the density of the low-density foam sandwich is 210 kg/m.
6. A foam sandwich structured composite cover as claimed in claim 1 or claim 2, wherein: the solid interlayer is a plurality of layers of flame-retardant epoxy glass fiber prepregs or flame-retardant epoxy carbon fiber prepregs.
7. A foam sandwich structured composite cover as claimed in claim 1 or claim 2, wherein: the solid sandwich was 10mm wide and had a thickness equal to the thickness of the high density foam core and the low density foam core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322367640.3U CN219903644U (en) | 2023-09-01 | 2023-09-01 | Composite material covering piece with foam sandwich structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322367640.3U CN219903644U (en) | 2023-09-01 | 2023-09-01 | Composite material covering piece with foam sandwich structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219903644U true CN219903644U (en) | 2023-10-27 |
Family
ID=88433828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322367640.3U Active CN219903644U (en) | 2023-09-01 | 2023-09-01 | Composite material covering piece with foam sandwich structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219903644U (en) |
-
2023
- 2023-09-01 CN CN202322367640.3U patent/CN219903644U/en active Active
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