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Method for molding phenolic panel honeycomb sandwich structural member

A technology of honeycomb interlayer and molding method, which is applied in the field of molding of phenolic panel honeycomb sandwich structure, can solve the problems of good ablation resistance, bulging, debonding, etc., achieve good heat insulation and ablation resistance, improve structural rigidity, Good effect of ablation resistance

Active Publication Date: 2017-05-03
HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the technical problems of difficulty in molding when phenolic resin is used in honeycomb sandwich structure panels in the prior art, easy deformation, debonding, and bulging after molding by providing a molding method for honeycomb sandwich structural parts of phenolic panels, and can be molded Large-sized honeycomb sandwich structure, no deformation, no debonding, no bulging after forming, good ablation resistance

Method used

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  • Method for molding phenolic panel honeycomb sandwich structural member
  • Method for molding phenolic panel honeycomb sandwich structural member
  • Method for molding phenolic panel honeycomb sandwich structural member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] S1: preparing phenolic resin prepreg; the resin content of the phenolic resin prepreg is 28%, and the volatile matter content is 2%; the phenolic resin prepreg adopts quartz fiber cloth / phenolic resin prepreg;

[0073] S2: Manufacture the mold of honeycomb sandwich structure shape, and mold is single-sided mold, adopts steel material, and guarantees 0.5MPa airtight test and does not leak;

[0074] S3: Inner skin and frame pre-curing

[0075] S3.1, preheating the mold at 40°C and keeping it warm for 40min;

[0076] S3.2, cutting the phenolic resin prepreg into the required size and shape, laying the inner skin and frame on the mold, and laying the layers to the required thickness and weight;

[0077] S3.3, spread breathable material on the surface of inner skin and frame, and wrap vacuum bag;

[0078] S3.4, evacuate the mold and the laminated vacuum product in the autoclave, and pre-cure under pressure; wherein, the pre-curing temperature is 120°C, time is 2h, and the ...

Embodiment 2

[0101] S1: prepare a phenolic resin prepreg; the resin content of the phenolic resin prepreg is 32%, and the volatile matter content is 4%; the phenolic resin prepreg adopts alkali-free glass fiber cloth / phenolic resin prepreg;

[0102] S2: Manufacture the mold of honeycomb sandwich structure shape, and mold is single-sided mold, adopts steel material, and guarantees 0.5MPa airtight test and does not leak;

[0103] S3: Inner skin and frame pre-curing

[0104] S3.1, preheating the mold at 60°C and keeping it warm for 20 minutes;

[0105] S3.2, cutting the phenolic resin prepreg into the required size and shape, laying the inner skin and frame on the mold, and laying the layers to the required thickness and weight;

[0106] S3.3, spread breathable material on the surface of inner skin and frame, and wrap vacuum bag;

[0107] S3.4, evacuate the mold and the laminated vacuum product in the autoclave, and pre-cure under pressure; wherein, the pre-curing temperature is 130°C, time...

Embodiment 3

[0130] S1: preparing phenolic resin prepreg; the resin content of the phenolic resin prepreg is 36%, and the volatile matter content is 6%; the phenolic resin prepreg adopts high silica glass fiber cloth / phenolic resin prepreg;

[0131] S2: Manufacture the mold of the shape of the honeycomb sandwich structure, the mold is a single-sided mold, made of aluminum, and ensures that the 0.5MPa airtight test does not leak;

[0132] S3: Inner skin and frame pre-curing

[0133] S3.1, preheat the mold at 80°C and keep it warm for 10 minutes;

[0134] S3.2, cutting the phenolic resin prepreg into the required size and shape, laying the inner skin and frame on the mold, and laying the layers to the required thickness and weight;

[0135] S3.3, spread breathable material on the surface of inner skin and frame, and wrap vacuum bag;

[0136] S3.4, evacuate the mold and the laminated vacuum product in the autoclave, and pre-cure under pressure; wherein, the pre-curing temperature is 140°C, ...

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Abstract

The invention discloses a method for molding a phenolic panel honeycomb sandwich structural member and belongs to the technical field of composite material molding. The phenolic panel honeycomb sandwich structural member comprises inner covering skin, outer covering skin, a frame, a honeycomb, a reinforcing fiber prepreg tape reinforcing layer, an inner glue film layer and an outer glue film layer. The method comprises preparing a phenolic resin prepreg cloth, preparing a mold having the honeycomb sandwich structure shape, pre-curing the inner covering skin and the frame, paving a reinforcing fiber prepreg tape through bonding the reinforcing fiber prepreg tape to the surface of the pre-molded inner covering skin to obtain the reinforcing fiber prepreg tape reinforcing layer, carrying out honeycomb installation and pre-curing, pre-curing the outer covering skin, assembling a product through paving the outer covering skin layer, integrally curing the assembled product and carrying out demolding. The method can mold a large-size honeycomb sandwich structure. The molded honeycomb sandwich structure does not deform, lose viscidity and produce bulge, has the size, weight and shape satisfying design requirements and has good ablation resistance.

Description

technical field [0001] The invention relates to the technical field of composite material molding, in particular to a molding method for a phenolic panel honeycomb sandwich structure. Background technique [0002] The honeycomb sandwich structure has excellent properties such as high specific strength, heat insulation and sound insulation, and is widely used in aerospace and civil industries for load-bearing structural parts that require light weight. However, ordinary metal panels, wood panels, plastic panels, and epoxy FRP panels have poor ablation resistance, and are prone to ablation damage in certain strong ablation environments in the aerospace field, affecting the normal operation of the product. The ablation resistance of the phenol molded panel is good, but the phenolic resin for ablation releases more small molecular substances when it is cured, and it is difficult to form, so it is rarely used in the panel of the honeycomb sandwich structure; the rigidity of the h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D7/01B29C70/34B29C65/50
CPCB29C65/50B29C66/02245B29C70/34B29D7/01
Inventor 杨恒常明阳陈娓陈伟
Owner HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL
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