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Method for soaking high-fall three-dimensional needling structure in low viscosity resin

A low-viscosity resin, high drop technology, used in other home appliances, home appliances, household components, etc., can solve the problems of uneven density, low resin viscosity, and large height drop between layers, achieving high degree of realization and technical difficulty. low effect

Active Publication Date: 2019-07-05
BEIJING SATELLITE MFG FACTORY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem of the present invention is: to overcome the deficiencies of the prior art, to provide a method for infiltrating a three-dimensional acupuncture structure with a low-viscosity resin, and to solve the process of infiltrating a low-viscosity resin with the reinforcement phase of a three-dimensional acupuncture structure. The height difference between the upper layers is large, and the resin viscosity is low, resulting in uneven density

Method used

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  • Method for soaking high-fall three-dimensional needling structure in low viscosity resin
  • Method for soaking high-fall three-dimensional needling structure in low viscosity resin
  • Method for soaking high-fall three-dimensional needling structure in low viscosity resin

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Embodiment 1

[0056] In the preparation of preform density 0.4g / cm 3 , when the three-dimensional needle-punched flat plate preform with a size of 500mm×500mm×80mm is used, the vertical dipping method is adopted, and the maximum height difference is 500mm. The phenolic resin with a glue content of 10% is dipped and diluted with ethanol. Use felt and vacuum bag film to wrap the workpiece, install a Φ10 aperture vacuum nozzle at a height of 300mm from the vertical upper side, and install a Φ30 aperture glue inlet interface at a distance of 300mm from the vertical lower side. Then the glue is injected and the glue inlet valve is closed. The whole is heated at 60°C, and after 4 hours of heat preservation, the bag is removed and placed vertically for resin drying and gel treatment. Then turn it over 180° to dip again, dry and solidify. Sampling at the highest point and the lowest point during the final product forming process, the density difference is 0.09g / cm 3 .

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Abstract

The invention relates to a method for soaking a high-fall three-dimensional needling structure in low viscosity resin. The method comprises the following steps that (1), the ratio of a low-viscosity thermal-insulation resin solution required by theoretical requirements is adjusted to obtain a compensation thermal-insulation resin solution; (2), the compensation thermal-insulation resin solution isadopted to soak the high-fall three-dimensional needling structure, and gelling and drying treatment of the resin are completed; (3), the three-dimensional needling structure after the gelling and drying treatment is turned over in the vertical direction to guarantee that the highest point and the lowest point of the three-dimensional needling structure are exchanged; and (4), the step (2) is repeated to compensate resin density in the three-dimensional needling structure to obtain a three-dimensional needling structure with uniform resin density. According to the method, the problem that inthe soaking process of a three-dimensional needling structure body wild phase in the low viscosity resin, density is not uniform due to the fact that the height fall between layers in the overall sizeconfiguration is large, and the viscosity of the resin is low.

Description

technical field [0001] The invention belongs to the technical field of forming low-density heat-insulating materials with a low-density three-dimensional needle-punched fiber structure as a reinforcing phase, and relates to a method for infiltrating a high-drop three-dimensional needle-punched structure with a low-viscosity resin to realize resin density compensation inside the structure. Development of thermal protection system for reversible spacecraft applied to the second cosmic speed. Background technique [0002] During the return and reentry process, the returnable spacecraft needs to experience high heat flow erosion, and the thermal protection system on the outer surface of the return aircraft is very important. With the continuous development of deep space exploration technology, returnable spacecraft has higher requirements for lightweight thermal protection system, surface structure stability and integrity. Integral molding of heat-resistant insulation materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/44B29C70/54B29L31/30
CPCB29C70/443B29C70/54B29L2031/3097
Inventor 张璇张明张幸红杨雷郑建虎关鑫张鹏飞孙天峰刘佳陶积柏宫顼张玉生赖小明黎昱靳志伟张辉
Owner BEIJING SATELLITE MFG FACTORY
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