PMI (polymethacrylimide) foam sandwich aircraft radar cover and manufacturing method thereof

A radome and foam technology, which is applied to other home appliances, frameless domes, home appliances, etc., can solve the problems of difficult foam interlayer molding, poor wave transmission performance, and high defective rate, so as to eliminate The foam density and thickness change is large, the foam thickness change is small, and the rigidity is good

Active Publication Date: 2017-05-31
SICHUAN TIANYUAN MACHINERY CO LTD OF 081 ELECTRONICS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the concave radome is thermoformed with a whole piece of PMI foam plate, the foam interlayer molding process is difficult, easy to be damaged, and the rate of defective products is high, and the density and thickness of the foam after molding will change, making the wave transmission performance worse.

Method used

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  • PMI (polymethacrylimide) foam sandwich aircraft radar cover and manufacturing method thereof
  • PMI (polymethacrylimide) foam sandwich aircraft radar cover and manufacturing method thereof
  • PMI (polymethacrylimide) foam sandwich aircraft radar cover and manufacturing method thereof

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Effect test

Embodiment 1

[0023] like Figure 1 to Figure 4 As shown, an embodiment of the present invention includes: a concave cover body 1 and a flange ring 2, the concave surface cover body 1 is composed of a skin layer 3, a cover body adhesive layer 10 and a first sandwich layer 4, and the skin layer 3 includes The upper skin 31 and the lower skin 32, the skin layer 3 adopts glass fiber prepreg, and the first sandwich layer 4 adopts PMI foam; the flange ring 2 is bonded by the flange skin 9 and the flange layer 11 and the second sandwich layer 5, the flange skin layer 9 is made of glass fiber prepreg, the flange adhesive layer 11 is made of epoxy film, and the second sandwich layer 5 is made of PMI foam, so The flange ring 2 is an annular body with a triangular radial section, and the flange ring 2 is provided with an adhesive surface 6 that matches the upper edge of the concave cover body 1; the bonding of the flange ring 2 The surface 6 is bonded to the upper edge of the concave cover body 1 . ...

Embodiment 2

[0032] like Figure 1 to Figure 4 Shown, the product of the second embodiment of the present invention is the same as embodiment 1. Considering the connection between the product and the aircraft fuselage, the product of this embodiment adds a pre-embedded metal connector. After the overall processing of the product is completed, the metal connector can be drilled and tapped.

[0033] A kind of manufacture method of PMI foam interlayer aircraft radome, comprises the steps:

[0034] Step 1. Preparation of materials and molds: Prepare glass fiber prepreg, PMI foam, epoxy film, cover body molding mold 7, flange ring molding mold 12, foam cutting mold, and choose ZG35 material for the mold material;

[0035] Step 2. Processing of the flange ring: conventional milling and processing into flange foam blanks. Considering the connection between this product and the aircraft fuselage, metal connectors need to be pre-embedded. In this embodiment, the following steps are added: in the f...

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PUM

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Abstract

A PMI (polymethacrylimide) foam sandwich aircraft radar cover comprises a concave cover body and a flange ring, wherein the concave cover body and the flange ring consist of a skin layer, a cover body adhering layer and a PMI sandwich layer. A manufacturing method of the PMI foam sandwich aircraft radar cover comprises the process steps of flange foam blank milling molding, cover body PMI foam blank block molding and skin adhering molding and curing. The product provided by the invention has the advantages of light weight, high rigidity and signal stability, and completely can meet electrical property, mechanical property and environment-resistant property test index requirements required by design. According to the PMI foam sandwich block molding process, the variable quantity of foam thickness is small after thermal molding and bending of flat foam, so the electrical property requirement of the radar cover is met to the greatest extent, and the wave transmission property becomes poor due to large variable quantity of foam density and thickness after molding by the integral molding process is effectively avoided.

Description

technical field [0001] The present invention relates to an aircraft radome and a manufacturing method thereof, in particular to a polymethacrylimide (PMI) foam interlayer radome and a manufacturing method thereof. Background technique [0002] Aircraft radomes usually use single-layer thin-walled glass fiber composite materials and honeycomb sandwich glass fiber composite materials. The single-layer thin-walled glass fiber composite radome is heavy and easy to deform; the honeycomb sandwich glass fiber composite material is due to the anisotropy of the honeycomb, and the signal becomes poor when the signal is incident at a large angle. [0003] Chinese patent 201610251585.3 titled "A Preparation Method for Thin-Wall Foam Sandwich Structure Composite Radome" discloses a method for manufacturing a foam sandwich structure radome. Wherein the foam layer is processed by a whole piece of foam, which wastes more than 90% of the material, and the processing time is long and the cos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D25/00
CPCB29D25/00Y02T50/40
Inventor 赵晓东罗小敏林静易洪林吴明泰
Owner SICHUAN TIANYUAN MACHINERY CO LTD OF 081 ELECTRONICS GRP
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