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Mandrel for manufacturing solid rocket engine and forming method of mandrel

A technology for solid rockets and motors, applied in the field of mandrels for manufacturing solid rocket motors and their molding, which can solve the problems of limited life and high cost of sand mandrels, and achieve the effects of small mass, easy operation, and reduced input costs

Inactive Publication Date: 2020-05-01
湖北航聚科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the problems raised in the background technology, to provide a core mold for solid rocket motor manufacturing and its molding method, the core mold as a production mold for solid rocket motors, can solve the high cost of the current sand core mold, Due to problems such as limited life, the core mold of the present invention has the characteristics of low cost, convenient construction and recyclable use

Method used

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  • Mandrel for manufacturing solid rocket engine and forming method of mandrel
  • Mandrel for manufacturing solid rocket engine and forming method of mandrel
  • Mandrel for manufacturing solid rocket engine and forming method of mandrel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Cut the required glass fiber cloth according to the size of the mandrel, and spray silane coupling agent on the glass fiber cloth, such as KH550, KH560, KH570, etc. Weigh methyl vinyl silicone rubber and carbon black at a weight ratio of 10:1, stir evenly, add curing agent, such as dicumyl hydrogen peroxide, and evenly scrape the silicone rubber after adding dicumyl hydrogen peroxide On the surface of the inner wall of the female mold, the glass fiber cloth sprayed with silane coupling agent is closely attached to the inner surface of the mold after the silicone rubber is scraped to obtain a structure in which a layer of glass fiber cloth and a layer of silicone rubber are bonded. The next layer of glue can be applied until the structure of two layers of glass fiber cloth and three layers of silicone rubber interlaced is formed. Finally, the female mold and tooling are spliced ​​and assembled.

[0024] The main body of the glass fiber cloth is subjected to a tensile te...

Embodiment 2

[0033] Cut the required silicone rubber cloth according to the size of the mandrel, and spray the silane coupling agent on the silicone rubber cloth. Weigh methyl vinyl silicone rubber and carbon black at a weight ratio of 10:1, stir evenly, add dicumyl hydrogen peroxide, and evenly scrape the silicone rubber after adding dicumyl hydrogen peroxide on the inner wall of the female mold On the surface, the silicone rubber cloth sprayed with silane coupling agent is closely attached to the inner surface of the mold after scraping the silicone rubber, and after a layer of silicone rubber cloth and a layer of silicone rubber layer are bonded, the next step can be started. One layer of glue is applied until the structure of two layers of silicone rubber cloth and three layers of silicone rubber layers is formed, and finally the mold and tooling are spliced ​​and assembled.

[0034] The main body of the silicone rubber cloth is subjected to a tensile test, and the shear strength test ...

Embodiment 3

[0043] Cut the required aramid cloth according to the size of the mandrel, and spray the silane coupling agent on the aramid cloth. Weigh methyl vinyl silicone rubber and carbon black at a weight ratio of 10:1, stir evenly, add dicumyl hydrogen peroxide, and evenly scrape the silicone rubber after adding dicumyl hydrogen peroxide on the inner wall of the female mold On the surface, the aramid cloth sprayed with silane coupling agent is closely attached to the inner surface of the mold after the silicone rubber is scraped to form a structure in which a layer of aramid cloth and a layer of silicone rubber are bonded, and then the next step can be started. One layer of glue is applied until a structure of two layers of aramid cloth and three layers of silicone rubber is formed, and finally the mold and tooling are spliced ​​and assembled.

[0044] The tensile test of the aramid cloth body and the shear strength test of the shear sample of the interlaced bonding structure of two l...

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Abstract

The invention discloses a mandrel for manufacturing a solid rocket engine and a forming method of the mandrel. A mandrel body is formed by splicing and assembling a female die and a tool; a reinforcement layer adheres to the inner surface of the female die; the reinforcement layer is formed by at least one reinforcement fabric layer and at least two silicone rubber layers in a staggered adhering manner, wherein the innermost layer and the outermost layer of the reinforcement layer are both the silicone rubber layers, and the reinforcement fabric layer is a two-dimensional or three-dimensionalbraided fabric, and is used for improving the strength of the reinforcement layer; and each silicone rubber layer is composed of silicone rubber and a silicone rubber reinforcing agent, the mass percentage of the silicone rubber is 70%-90%, and the mass percentage of the silicone rubber reinforcing agent is 10%-30%. According to the mandrel for manufacturing the solid rocket engine and the formingmethod of the mandrel, the gastightness of the mandrel of the solid rocket engine is guaranteed through the silicone rubber layers, the reinforcement fabric easy to deform is adopted for maintainingthe size and the outline face of the mandrel, and due to the combined use of the reinforcement fabric and the silicone rubber, the air bag mandrel has excellent gastightness and an intact outline size.

Description

technical field [0001] The invention belongs to the technical field of manufacturing solid rocket motors, and in particular relates to a mandrel for manufacturing solid rocket motors and a molding method thereof. Background technique [0002] The solid rocket motor composite shell is formed by wet winding. The winding process is to wind the continuous carbon fiber impregnated with resin glue solution to the mandrel under certain tension control in the way of longitudinal winding, hoop winding, etc., and then cured. , demoulding, and obtain the finished product of the solid rocket motor case. During filament winding molding, the mandrel is the most important supporting structure, and the dimensional accuracy and apparent quality of the shell are related to the mandrel. At present, the core mold used in the manufacture of solid rocket motor shells is silica sand core mold, but with the continuous improvement of engine manufacturing technology, the diameter and charge of the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/00B29C33/38B29C33/40B29C70/30
CPCB29C33/00B29C33/3842B29C33/40B29C70/30B29C2033/385
Inventor 陈海亚肖勇钟志文周睿余明敏赵飞马宝合曾杰周超
Owner 湖北航聚科技股份有限公司
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