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Forming method of large-size and large-thickness rigid aerogel component

A molding method and aerogel technology, applied in coating and other directions, can solve the problems of insufficient structural design, difficult operation, time-consuming and cost-intensive processing, etc., to improve stability and uniformity, prolong service life, and avoid mold production. rust effect

Inactive Publication Date: 2020-11-03
CHANGSHA RONGLAN MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex structure of the new type of aircraft and other parts, such as the cabin, and the need to withstand vibration during use, the flexible airgel thermal insulation felt has serious powder loss, poor vibration performance, and is difficult to use. Therefore, there is an urgent need for a certain shape. Rigid airgel insulation material can ensure that the airgel profile fits well with the metal cabin profile, and can withstand harsh requirements such as vibration and impact during use
Most of the existing airgel components are formed by first positioning the shaped fiber body through a molding mold, then passing the sol into the mold through a special impregnation device, and then impregnating the shaped fiber body with the sol, but due to the existing molding Insufficient structural design of the mold can easily lead to unstable molding of airgel components, which can easily lead to uneven thickness, cracking, and poor roughness of airgel components, and at the same time, the utilization rate of sol is low; and the existing The current airgel member forming method also has relatively large deficiencies, such as difficult operation, time-consuming and cost-intensive processing

Method used

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  • Forming method of large-size and large-thickness rigid aerogel component
  • Forming method of large-size and large-thickness rigid aerogel component
  • Forming method of large-size and large-thickness rigid aerogel component

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Effect test

Embodiment 1

[0029] Such as figure 1 As shown, a method for forming a large-size, large-thickness rigid airgel member according to the present invention comprises the following steps:

[0030] (1) Preparation: prepare forming mold 1, vacuum impregnation device 2, shaped fiber body 3, several flexible cotton felts, autoclave, sol; Figure 1 to Figure 10 As shown, the forming die 1 includes a punch body 11, a die body 12, two positioning pins 13, and several locking bolts 14. The punch body 11 and the die body 12 are made of carbon steel or die steel or stainless steel or Made of aluminum alloy, and galvanized or Cr-plated on the surface of the punch body 11 and the die body 12, the lower surface of the punch body 11 is provided with a punch part 111, and the lower surface of the punch body 11 There is an annular first trimming groove 112 on the top, and the first trimming groove 112 surrounds the punch part 111, and the first guide groove 113 and the second guide groove 113 are respectivel...

Embodiment 2

[0052] A large-size, large-thickness rigid airgel member forming method described in the present invention,

[0053] Such as figure 2 As shown, the arc-shaped airgel insulation component to be prepared adopts the following dimensions: thickness 40mm, arc length at one end 450mm, arc length at one end 400mm, length 400mm, and the surface accuracy of the product is required to be ±0.2mm; the arc-shaped airgel The shape of the insulation and figure 2 The shape of the medium-setting fiber bodies 3 is the same.

[0054] Step 1: Design a set of forming molds for rigid airgel components impregnated with SiO2 sol according to product drawings;

[0055] Described mold adopts Q235 carbon steel, surface Cr plating;

[0056] The structure of the forming die is exactly the same as that of the forming die 1 in Embodiment 1, and the forming die also includes a male die body 11, a female die body 12, two positioning pins 13, and several locking bolts 14;

[0057] The diameter of each di...

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Abstract

The invention relates to a forming method of a large-size and large-thickness rigid aerogel component. The forming method comprises the following steps: a forming mold, a vacuum impregnation device, ashaped fiber body, a plurality of flexible cotton felts, a high-pressure kettle and sol are prepared; the shaped fiber body is arranged in the forming mold, and the vacuum impregnation device is added into a sol barrel; the forming mold is arranged on the vacuum impregnation device; the vacuum impregnation device is started for impregnation treatment; the forming mold is placed in the high-pressure kettle for supercritical drying; and the formed aerogel component is taken out and trimmed. By means of the method, the large-size and large-thickness rigid aerogel component can be manufactured very conveniently, the situations of uneven thickness, cracking, poor roughness and the like are avoided, the manufacturing quality of the aerogel component can be effectively improved, special vacuum impregnation equipment is not needed in the impregnation process, the method also has the advantages of simple operation, high sol dipping efficiency, high sol utilization rate, high processing efficiency, low cost and the like, and the method has more obvious advantages when being used for processing components with larger sizes.

Description

technical field [0001] The invention relates to a method for forming an airgel component. Background technique [0002] As a new type of high-efficiency thermal insulation material, airgel has the characteristics of high temperature resistance, light weight, good mechanical properties and molding properties, and has shown broad application prospects in the aerospace field. Due to the complex structure of the new type of aircraft and other parts, such as the cabin body, and the need to withstand vibration during use, the flexible airgel thermal insulation felt has serious powder loss, poor vibration performance, and is difficult to use. Therefore, there is an urgent need for a certain shape. The rigid airgel insulation material can ensure that the airgel profile fits well with the metal cabin profile, and can withstand harsh requirements such as vibration and impact during use. Since most of the existing airgel components are formed by first positioning the shaped fiber body...

Claims

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Application Information

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IPC IPC(8): B29C70/44B29C33/30B29C33/38B29C37/00
CPCB29C33/30B29C33/38B29C37/0092B29C70/443
Inventor 高庆福李勇李思武杨斌熊熙
Owner CHANGSHA RONGLAN MACHINERY
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