Manufacturing method for composite launch vehicle engine shell

Abstract

The invention discloses a manufacturing method for a composite launch vehicle engine shell. The manufacturing method comprises the following steps: (1) mold assembly is conducted, specifically, a coremold device is assembled; (2) a gypsum layer is smeared, specifically, gypsum is evenly smeared on the surface of a section assembly, and extra gypsum is scraped through a scraping plate assembly, and a molded surface is obtained; (3) a product is paved with a layer, specifically, the surface of the gypsum is paved with the layer, and after solidification, the product is obtained; and (4) the product is demolded, specifically, as for the core mold device in the product, a core mold is dismantled according to the sequence of a large-end shaft sleeve, a small-end shaft sleeve, a core shaft, a connecting rod, a large-end locking flange, a small-end locking flange, a large-end section, a middle section and a small-end section. The product is easy to demold, and the inner surface of the product is not damaged.

Description

technical field [0001] The invention relates to a shell of a rocket engine, in particular to a core mold device. Background technique [0002] The launch vehicle motor casing is used to load gunpowder. It has high requirements for the internal shape and size of the product. The internal shape and size affect the filling of the gunpowder and the performance of the rocket. Therefore, the internal shape of the product must be guaranteed. Surface and size have always been a key. [0003] In the past, the launch vehicle engine shells were all made of stamped metal materials. Now that there are composite materials with specific strength, specific modulus, light weight and designability, we need to reconsider the use of composite materials for launch vehicle engine shells. How the material is manufactured. [0004] For the molding of composite launch vehicle engine shells, there are now all-metal split mandrel molding and all-gypsum mandrel molding. For the all-metal split mandr...

AI Technical Summary

Problems solved by technology

For the all-metal split mandrel, because the metal splits are in direct contact with the product, a little carelessness in the release mode will damage the inner heat-insulating rubber surface of the product; and the full-gypsum mandrel is too thick because the plaster mandrel is too thick, if the shell size is large The internal moisture is not easy to dissipate, and the gypsum may crack when the product is pressurized and solidified, and serious collapse will occur

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