Paulownia wood core material for laminated structure

A sandwich structure, paulownia wood technology, applied in the field of materials, can solve the problems of limited Balsa balsa resources, unrealistic import and high price, and achieve the effect of price advantage, low cost and wide range

Inactive Publication Date: 2008-07-09
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, Balsa balsa wood resources are limited and the

Method used

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  • Paulownia wood core material for laminated structure
  • Paulownia wood core material for laminated structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The Paulownia wood flat core material of the present invention adopts Paulownia wood resources, which are cut, sterilized, dried, and assembled into a whole piece of Paulownia wood flat board. After the assembly is completed, the wood fibers of the Paulownia wood core material 1 are perpendicular to the direction of the panel 2. The resin-based fiber panel 2 is formed by hand lay-up process on the upper and lower surfaces of the plate to form a sandwich structure plate of paulownia wood sandwich composite material.

Embodiment 2

[0027] The Paulownia wood flat core material of the present invention adopts Paulownia wood resources, which are cut, sterilized, dried, and assembled into a whole piece of Paulownia wood flat board. After the assembly is completed, the wood fibers of the Paulownia wood core material 1 are perpendicular to the direction of the panel 2. The upper and lower surfaces of the wood core material 1 are provided with pointed grooves 5 arranged orthogonally, and at the same time, circular perforations are arranged at the intersection of the grooves along the thickness direction of the Paulownia wood core material 1, and the resin is formed after pouring epoxy resin. The cylinder 6 is covered with panels 2 on both sides of the core material of the paulownia wood plate. The panels 2 are formed by curing two layers of four-axis glass fiber cloth and epoxy resin, and are prepared by vacuum injection molding process.

Embodiment 3

[0029] The paulownia wood profile board core material of the present invention adopts paulownia wood resources, which are cut, sterilized, dried, and assembled into a whole piece of paulownia wood flat board. The thickness direction of 1 is cut orthogonally to form a cutting seam 3, and a thin glass fiber felt 4 is pasted on one side thereof to form a core material of a Paulownia wood profile board that can be easily formed into a shell shape, and on both sides of the Paulownia wood profile board core material Both are laid with a sandwich structure panel 2, and the panel 2 is formed by curing three layers of biaxial glass fiber cloth and vinyl resin, and is prepared by a vacuum introduction molding process.

[0030] The preparation method of the above-mentioned paulownia wood flat board and profile board core material adopts manual or industrialized production, and the preparation process is as follows:

[0031] a. Paulownia wood is sterilized, dried, cut and assembled;

[0...

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PUM

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Abstract

The present invention discloses a paulownia wood core material used for sandwich structures, the material applied by the paulownia wood core material is paulownia wood, and the present invention is characterized in that the paulownia wood fibre of the paulownia wood core material (1) is vertical to the direction of the panels (2) of the sandwich structure, and the present invention is divided into a paulownia wood flat board core material and a paulownia wood profile board core material. Used for various forms of sandwich structures, such as a composite material sandwich structure, metal panel sandwich structure, etc., the present invention is characterized in strong compression-resistant and shearing-resistant capability, lightness, toughness, flame resistance, fatigue resistance, warp resistance and low cost, and mass production is easy.

Description

technical field [0001] The invention relates to a sandwich core material used in a sandwich structure, which can be used as a core material in various sandwich structure forms such as a composite material sandwich structure and a metal panel sandwich structure, and belongs to the field of materials. Background technique [0002] At present, sandwich structures such as composite sandwich structures and metal panel sandwich structures used in engineering fields at home and abroad mainly use aluminum honeycomb, paper honeycomb, plastic honeycomb, PVC foam, polyurethane foam, phenolic foam, aluminum foam, etc. as sandwich materials. Recently, Balsa balsa wood is used as the core material in wind blades and ships, and composite structural parts such as large wind blades and hulls are prepared by hand lay-up, vacuum bag, vacuum introduction and other molding processes. Balsa balsa wood is produced in Ecuador, South America. It is the wood with the smallest density in the world. Th...

Claims

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Application Information

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IPC IPC(8): B27D1/04B32B21/04
Inventor 刘伟庆方海万里
Owner NANJING UNIV OF TECH
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