Bonding forming method of silicone rubber soft mold pressing heat insulation layer

A molding method and a technology for a thermal insulation layer, which are applied in the field of bonding and molding of a silicone rubber soft mold pressurized thermal insulation layer, can solve the problems of slow expansion speed of the soft mold, uncontrollable expansion pressure of the soft mold, low compactness of the thermal insulation layer, etc. Forming cost, saving air cost, and consistent contact pressure

Inactive Publication Date: 2019-02-26
西安长峰机电研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is more common in the field of composite material FRP and plastic molding, but there are few reports on the molding of solid rocket motor adiabatic shells. Compared with FRP materials, the main problem is that the soft mold expands during the heating and

Method used

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  • Bonding forming method of silicone rubber soft mold pressing heat insulation layer
  • Bonding forming method of silicone rubber soft mold pressing heat insulation layer
  • Bonding forming method of silicone rubber soft mold pressing heat insulation layer

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0022] The present invention is aimed at the free-loading powder column thermal insulation shell with high requirements on the surface accuracy of the thermal insulation layer, such as figure 1 For the structure shown, the molding plan is as follows: firstly, the required heat insulation layer is preformed by tooling, that is, the shape, structure, thickness, etc. meet the design requirements, but the heat insulation layer is not vulcanized; then the preformed heat insulation layer sleeve is pasted in the combustion chamber shell , a tooling molded with silicone rubber material with a high expansion coefficient, as a pressurized medium, pressurized and vulcanized under the temperature conditions required for the vulcanization of the heat insulation layer; the molding process...

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Abstract

The invention provides a bonding forming method of a silicone rubber soft mold pressing heat insulation layer. The method comprises the following steps: firstly preforming a required non-vulcanized heat insulation layer through a tool, wherein a shape, a structure, thickness and the like of the preformed heat insulation layer meet design requirements; pasting the preformed heat insulation layer ina housing of a combustion chamber, and performing pressing vulcanization under a temperature condition required by vulcanization of the heat insulation layer by taking a tool formed by a silicone rubber material with a high expansion coefficient as a pressing medium. The method can improve compactness of the heat insulation layer, ensures a high precision molding surface and thickness of the heatinsulation layer and lowers the production cost.

Description

technical field [0001] The invention relates to a method for bonding and forming a heat insulating layer. Background technique [0002] The heat insulation layer is an important part of the heat-resistant structure of the solid rocket motor. It plays the role of preventing the temperature in the combustion chamber of the engine from reaching its structural integrity, and bears the responsibility of resisting high temperature, high gas flow and particle erosion. Common thermal insulation layer bonding methods generally include patch vulcanization bonding method and preform / vulcanization bonding method, and the more common pressurization methods in the thermal insulation layer vulcanization process are airbag pressurization and vacuum autoclave pressurization. The airbag pressurization is suitable for engines that do not require high dimensional accuracy of the heat insulation layer, such as the wall-mounted pouring engine. The specific operation is to cut the heat insulation ...

Claims

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Application Information

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IPC IPC(8): B29C35/02B29C65/48
CPCB29C35/02B29C65/48
Inventor 秦锋张新航张方雒鹏科包乐张崇耿
Owner 西安长峰机电研究所
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