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Integrally-formed sandwich structure and production technology thereof

A sandwich structure and integrated technology, applied in the direction of synthetic resin layered products, layered products, metal layered products, etc., can solve the problems of easy layering of the surface layer and core material, low production efficiency, and insufficient impact resistance. Achieve good apparent size, good interface bonding, improve strength and impact resistance

Inactive Publication Date: 2020-04-10
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of low production efficiency, insufficient impact resistance, and easy delamination of the surface layer and core material in the sandwich structure in the prior art, the present invention provides an integrally formed sandwich structure and process

Method used

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  • Integrally-formed sandwich structure and production technology thereof

Examples

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Effect test

Embodiment 1

[0030] like figure 1 As shown, an integrally formed sandwich structure includes an upper layer 1, a strength layer, a core layer 3, a strength layer and a lower layer 5 arranged sequentially from top to bottom; the upper layer 1 and the lower layer 5 are surface-treated Aluminum alloy, the reinforcing material of the strength layer is looped fabric, the core layer 3 includes a three-dimensional hollow mesh cloth pre-shaped with a small amount of epoxy resin and a foam material filling the internal voids of the three-dimensional hollow mesh cloth.

[0031] An integrally formed sandwich structure process is prepared according to the following steps:

[0032] Step 1: arrange the aluminum alloy in the mold cavity, and fix it by vacuum adsorption of the mold, where the vacuum degree is 0.093MPa;

[0033] Step 2: Lay the loop fabric, three-dimensional hollow mesh cloth and loop fabric in sequence in the mold;

[0034] Step 3: Import the prepared foamed epoxy resin into the target ...

Embodiment 2

[0038] An integrally formed sandwich structure, including an upper layer 1, a strength layer, a core layer 3, a strength layer and a lower layer 5 arranged sequentially from top to bottom; the upper layer 1 and the lower layer 5 are PVC panels, and the reinforcement material for the strength layer is In the looped fabric, the core layer 3 includes a three-dimensional hollow mesh cloth that has been pre-shaped with a small amount of foamed epoxy resin and a foam material that fills the internal voids of the three-dimensional hollow mesh cloth.

[0039] An integrally formed sandwich structure process is prepared according to the following steps:

[0040] Step 1: arrange PVC panels in the mold cavity, and fix them by vacuum adsorption of the mold, where the vacuum degree is 0.095MPa;

[0041] Step 2: Lay the loop fabric, three-dimensional hollow mesh cloth and loop fabric in sequence in the mold;

[0042] Step 3: Import the prepared foamed epoxy resin into the target mold;

[0...

Embodiment 3

[0045] Embodiment 3: an integrally formed sandwich structure, including an upper layer 1, a strength layer, a core layer 3, a strength layer and a lower layer 5 arranged sequentially from top to bottom; the upper layer 1 and the lower layer 5 are non-woven felts, The reinforcing material of the strength layer is looped fabric, and the core layer 3 includes a three-dimensional hollow mesh cloth pre-shaped with a small amount of foamed epoxy resin and a foam material filling the internal voids of the three-dimensional hollow mesh cloth.

[0046] An integrally formed sandwich structure process is prepared according to the following steps:

[0047] Step 1: arrange the non-woven felt in the mold cavity, and fix it by vacuum adsorption of the mold, where the vacuum degree is 0.097MPa;

[0048] Step 2: Spread loop fabric, three-dimensional hollow mesh cloth, and loop fabric in sequence in the mold;

[0049] Step 3: Import the prepared foamed epoxy resin into the target mold;

[005...

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Abstract

The invention discloses an integrally-formed sandwich structure and a production technology thereof, and relates to the technical field of sandwich structures. The integrally-formed sandwich structurecomprises a surface layer, a strength layer and a core layer; the reinforcing material of the strength layer is a looped fabric; the core layer is composed of a three-dimensional hollow gridding cloth and a foam material filling gaps in the three-dimensional hollow gridding cloth; and the surface layer is made of a metal or nonmetal material. The production technology comprises the following steps: adsorbing the surface layer material in a mold cavity; then sequentially paving the looped fabric, the three-dimensional hollow gridding cloth and the looped fabric; and introducing epoxy resin into a target mold, curing, and demolding after curing is completed to obtain the sandwich structure. The sandwich structure obtained through the technology overcomes the defect that traditional sandwichstructures such as honeycombs and foam core materials are prone to layering, and has the outstanding advantages of simple process, convenience in operation, remarkable weight reduction, high impact resistance and the like.

Description

technical field [0001] The invention relates to the technical field of sandwich structures, in particular to an integrally formed sandwich structure and technology. Background technique [0002] Sandwich structure composite material is a structural form composed of high-strength surface layer and lightweight core material. It is generally a structure in which fiber-reinforced composite materials are used as the surface layer, and foam and honeycomb are used as the sandwich material. The sandwich structure not only makes full use of the advantages of high strength and light weight of fiber reinforced composite materials, but also cleverly uses the section moment of inertia obtained by the lightweight core material to achieve ideal structural performance. Due to its high specific strength, high specific stiffness, With the characteristics of significant weight reduction and other characteristics, the application fields of composite sandwich structures are becoming more and mo...

Claims

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Application Information

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IPC IPC(8): B32B15/20B32B15/14B32B5/02B32B27/38B32B27/12B32B27/30B32B5/26B32B33/00B29C44/06B29C44/12B29C44/08B29C44/60
CPCB29C44/06B29C44/08B29C44/12B29C44/60B32B5/02B32B5/022B32B5/18B32B5/245B32B5/26B32B15/14B32B15/20B32B27/12B32B27/304B32B33/00B32B2250/40B32B2266/0271B32B2307/558
Inventor 李华冠章月匡宁李红丽
Owner NANJING INST OF TECH
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