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Thermal forming method for rigid foam core material

A rigid foam and thermoforming technology, which is applied in the field of composite material manufacturing, can solve the problems of wasting materials and achieve the effect of solving waste materials

Inactive Publication Date: 2017-05-31
JIANGXI HONGDU AVIATION IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most manufacturers are adopting the PMI foam core material formed by mechanical processing on the PMI plate with sufficient thickness. The foam core material formed by this method can ensure the shape, but for parts with large curvature, it will greatly waste materials.

Method used

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Embodiment Construction

[0020] The present invention is described in detail below in conjunction with accompanying drawing:

[0021] A method for thermoforming a rigid foam core material, the steps of the method are as follows:

[0022] 1) Place the PMI foam board on the molding die 5 according to the theoretical position;

[0023] 2) Stick Airpad rubber 1 on both ends of the PMI foam board with pressure-sensitive tape to prevent the vacuum bag 2 from being sucked between the PMI foam board 4 and the mold, resulting in poor molding of the PMI foam;

[0024] 3) Lay a layer of air felt 3 on the foam board, seal the PMI foam with a vacuum bag 2 and a putty strip, and place a thermocouple on the edge of the air felt;

[0025] 4) Install the quick release nozzle on the mold;

[0026] 5) Connect the quick release nozzle on the mold to the vacuum equipment of the curing furnace through the vacuum pipeline, and then connect the thermocouple to the curing furnace;

[0027] 6) Raise the temperature to 190°C...

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Abstract

The invention relates to a thermal forming method for a rigid foam core material and belongs to the technical field of composite manufacturing. The thermal forming method mainly comprises the steps of putting a PMI foam board onto a female mold forming mold through a vacuum bag / curing oven forming technology; blocking the two ends of the PMI foam board with Airpad rubber; laying ventilated felt on the surface of the PMI foam board; then, pasting a vacuum bag; and forming the PMI board through bending by way of heating and vacuum extraction. According to the thermal forming method, the PMI foam core material is formed through the vacuum bag / curing oven forming technology, and the problem that when a machining forming mode is adopted, a great number of materials are wasted is solved.

Description

technical field [0001] The invention relates to a thermoforming method for a rigid foam core material, which belongs to the technical field of composite material manufacturing. Background technique [0002] Under the same density conditions, PMI foam is the foam core material with the highest strength and stiffness. Its high temperature creep resistance makes the foam suitable for high temperature curing resins and prepregs. After proper high-temperature treatment, PMI foam can meet the requirements of 190°C curing process for foam stability, and is suitable for sandwich structures co-cured with epoxy resin or BMI resin, such as aerospace structures, medical bed boards, high-speed trains, etc. . [0003] At present, most manufacturers are adopting the PMI foam core material formed by mechanical processing on the PMI plate with sufficient thickness. The foam core material formed by this method can ensure the shape, but for parts with large curvature, it will greatly waste m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C53/04B29C53/84B29C53/80
CPCB29C53/04B29C53/80B29C53/84B29C2791/006
Inventor 龚文马军鄢和庚高慧聪胡芳芝李跃王德盼刘影辛洪南李燕银郑美侠梁彦赵胜男徐清红胡静李冬青
Owner JIANGXI HONGDU AVIATION IND GRP
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