Forming device for heat insulation end socket air bag

Abstract

The invention discloses a heat insulation end socket air bag forming device which comprises an upper die and a lower die, and an air bag is arranged in a space defined by the upper die and the lower die. A middle mold is arranged between the air bag and the lower mold, and the middle mold is detachably connected with the lower mold; a detachable metal joint is arranged on the middle mold; and the heat insulating layer is filled in a space enclosed by the air bag, the lower die, the middle die and the metal joint. The sealing head is integrally formed in an air bag pressurization mode. In addition, the pressure of the air bag is uniform, and the device is more suitable for bonding forming of the root of an artificial debonding layer of the end socket at the equatorial line. Compared with compression molding, air bag forming has flexibility, integral forming of complex structural parts is easy to achieve, assembling and disassembling are easy, convenient and fast, cost is low, and a large amount of working hours can be saved. The forming device can achieve forming of various heat insulation end sockets, and is particularly suitable for forming of heat insulation end sockets of large-scale and ultra-large-scale solid rocket engines.

Description

technical field [0001] The invention belongs to the technical field of composite material forming and processing, in particular to an integrated forming device of aerospace thermal insulation material and metal material. Background technique [0002] The Chinese patent "A method of manufacturing a composite material thermal insulation head of a rocket motor casing", publication number CN112297461A published on 2021.02.02, discloses a method of manufacturing a composite thermal insulation head of a rocket motor casing, including the following steps: 1) Joints Production: Use carbon fiber prepreg to make joints through the layup curing process; 2) Prepare raw materials: use a cutting machine to cut the rubber sheet to be laid and chamfer; 3) Lay: in the lower mold from the bottom Lay the first rubber layer, the second rubber layer and the third rubber layer in sequence from the top, put the joints in the process of laying the first rubber layer, and put the joint between the p...

AI Technical Summary

Problems solved by technology

With the development of aerospace technology, the length-to-diameter ratio of solid rocket motor composite shells increases. In order to minimize the stress effect caused by the shrinkage of the grain, the root part of the artificial debonding layer of the head needs to be moved to the equator line. This goal is difficult to achieve with traditional axially pressurized monolithic molding techniques

In addition, with the development and production of large-scale filament winding shells, the overall molding method requires high investment costs for molding tooling and equipment

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