Grating structure reinforced foam sandwich composite material preparation method based on secondary forming

A grid structure and composite material technology, applied in the field of sandwich structure composite material preparation, can solve problems such as low cost and high precision, and achieve the effects of low manufacturing cost, simple assembly and mature technological process.

Pending Publication Date: 2022-03-04
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology

[0006] In view of this, the purpose of the present invention is to provide a method for preparing a grid structure-reinforced foam sandwich composite based on overmolding, so as to solve the problem that there is no such novel composite sandwich structure as a grid structure-reinforced foam sandwich composite. Low-cost high-precision preparation method problem

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  • Grating structure reinforced foam sandwich composite material preparation method based on secondary forming
  • Grating structure reinforced foam sandwich composite material preparation method based on secondary forming
  • Grating structure reinforced foam sandwich composite material preparation method based on secondary forming

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preparation example Construction

[0034] Preparation method of lattice structure reinforced foam sandwich composites based on overmolding, see figure 2 , mainly including the following steps:

[0035] S1. Auxiliary tooling processing: Design and process the shape and size of the auxiliary tooling sub-component 1 according to the configuration of the target composite grid structure 2. The schematic diagram of the auxiliary tooling sub-component is as follows figure 1 shown;

[0036] S2. Upright assembly of auxiliary tooling sub-components: according to the configuration of the target composite grid structure 2, the bottoms of several upright auxiliary tooling sub-components 1 are bonded to the mold 7, and the several auxiliary tooling sub-components 1 are parallel to each other. Set at intervals; when bonding the auxiliary tooling sub-components 1, the bottom of the auxiliary tooling sub-components 1 is all or partially coated with adhesive, glue or double-sided adhesive tape; then the surface of each auxilia...

Embodiment 1

[0049] Embodiment 1 is a lattice structure reinforced foam sandwich composite material in which the smallest repeating unit of the lattice structure has an isosceles trapezoidal cross-section, wherein the dimensions of the isosceles trapezoid are 20mm for the upper bottom, 66.2mm for the lower bottom, and 40mm for the height.

[0050] The length of the upper panel is 1245mm, the length of the lower panel is 1295mm, the width and thickness of the upper and lower panels are the same, respectively 1070mm and 2.7mm; the length and thickness of the grid structure are 1070mm and 0.25mm respectively; The number is 29, the length is 1070mm, the cross-sectional size is 20mm for the upper bottom, 66.2mm for the lower bottom, and 40mm high.

[0051] The cross-section of auxiliary tooling sub-components is isosceles trapezoidal, the number is 29, the length is 1070mm, the cross-sectional size is 20mm for the upper bottom, 66.2mm for the lower bottom, and 40mm in height, the distance betwee...

Embodiment 2

[0064] Embodiment 2 is a grid structure reinforced foam sandwich composite material in which the smallest repeating unit of the grid structure has an isosceles trapezoidal cross section, wherein the size of the isosceles trapezoid is 20 mm for the upper bottom, 66.2 mm for the lower bottom, and 40 mm high.

[0065] The length of the upper panel is 1245mm, the length of the lower panel is 1295mm, the width and thickness of the upper and lower panels are the same, respectively 1070mm and 2.7mm; the length and thickness of the grid structure are 1070mm and 0.25mm respectively; The number is 29, the length is 1070mm, the cross-sectional size is 20mm for the upper bottom, 66.2mm for the lower bottom, and 40mm high.

[0066] The cross-section of auxiliary tooling sub-components is isosceles trapezoidal, the number is 29, the length is 1070mm, the cross-sectional size is 20mm for the upper bottom, 66.2mm for the lower bottom, and 40mm in height, the distance between adjacent auxiliary...

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Abstract

The invention provides a preparation method of a grid structure reinforced foam sandwich composite material based on secondary forming, which adopts a secondary forming mode, namely, a first step of prefabricating a composite material grid structure, a second step of filling a foam core material, paving an upper panel and a lower panel, and then adopting a conventional composite material forming process for integral forming. The process amplification is easily realized, and the process risk is obviously reduced; the thickness and shape of the grating structure can be accurately controlled through a simple auxiliary tool, and the problems that in the forming process of the grating structure reinforced foam sandwich composite material, the size of an interlayer preformed body is difficult to accurately control, and the overall stability and quality consistency of a product are poor are fundamentally solved; meanwhile, through the geometric configuration design of the sub-components of the auxiliary tool and the design of the distance between the adjacent sub-components, the preparation of the reinforced foam sandwich composite materials with different types of grid structures can be realized; in addition, the auxiliary tool is easy to operate, low in manufacturing cost, large in design margin, easy to assemble and capable of being quickly assembled and disassembled, and the preparation efficiency of the preformed body is remarkably improved.

Description

technical field [0001] The invention relates to a preparation method of a sandwich structure composite material, in particular to a preparation method of a grid structure reinforced foam sandwich composite material based on secondary molding, which is mainly used in a grid structure reinforced foam sandwich composite material, especially a large-sized lattice Low cost and high quality molding of grid structure reinforced foam sandwich composites. Background technique [0002] Traditional foam sandwich composite materials are composed of upper and lower composite material panels with high strength and modulus and low-density foam sandwich materials between the upper and lower panels, which have high specific strength and specific stiffness; at the same time, low density The foam sandwich material has the functions of fire prevention, heat insulation, sound insulation and energy absorption. Therefore, the traditional foam sandwich composite material has become a typical struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54B29C44/12B29C44/18B29C44/34B29C44/56
CPCB29C70/342B29C70/54B29C44/1228B29C44/18B29C44/34B29C44/56
Inventor 朱俊宋金鹏桂林崔进
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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