Forming device of extruded type micro explosive column

Abstract

The invention discloses a forming device of an extruded type micro explosive column, which comprises a push rod, an extruding cylinder, a bolt, an upper cover, a lower cover and a propellant forming die. The explosive column forming principle of the device is that the push rod is rotated forward,a certain pressure is formed in the extruding cylinder and paste propellant on the die is extruded into the hole of the die. The slow rotating push of the push rod is used to completely and accurately control the pressure in the extruding cylinder. The use of the gas extrusion solves the problems of providing the micro solid engine with the micro explosive column of complete structure and free filling, the device is of simple and small structure, and ordinary machining just can meet the demands.

Description

Technical field [0001] The invention relates to a solid propellant molding device, in particular to an extrusion type micro-grain molding device. It belongs to the technical field of solid rocket motors and is suitable for small and trace propellants and related products filled in micro solid rocket motors. Background technique [0002] As an excellent power system for micro-satellites, the micro-solid propulsion system based on MEMS technology has become a hot spot favored by researchers at home and abroad, and has good application prospects. One of the important tasks in the research of micro-solid propulsion system is how to fill the micro-solid engine combustion chamber with propellant. The diameter of the combustion chamber of the micro-solid engine based on MEMS technology ranges from sub-millimeter to millimeter. When propellant is filled into the hole or chamber with such a small diameter / depth, capillary phenomenon will appear in the chamber. The common method is to put...

AI Technical Summary

Problems solved by technology

[0005] The "vacuum filter press" device developed by Professor Shen Ruiqi's research group can better solve the pouring problem of tiny drug columns, but there are still some shortcomings: the drug and binder become a suspension liquid under the dissolution of an organic solvent, and not only When the organic solvent is pumped into the filter layer, part of the medicament and binder will be lost, which will cause the formulation of the propellant to change

[0006] The disadvantage of the filling method designed by Professor C Rossi and others is that the diameter of the combustion chamber of the micro-engine is less than one millimeter, and it is difficult to process the conversion head that can extend into the combustion chamber of the micro-engine, and the process is complicated

In addition, a pressure device is required to press the pasty GAP propellant into the conversion head, and the structure of the device is complicated

This method is similar to the vacuum casting method in large solid motors to make grains, and cannot produce free-loading grains

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