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Solvent-free companding and forming mold for porous propellant and companding process

A forming mold, solvent-free technology, applied in the direction of presses, manufacturing tools, offensive equipment, etc., can solve difficult problems and achieve the effect of ensuring product quality

Active Publication Date: 2018-01-09
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The machining process of materials with high hardness is difficult, but the smoothness is relatively easy to meet the design requirements

Method used

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  • Solvent-free companding and forming mold for porous propellant and companding process
  • Solvent-free companding and forming mold for porous propellant and companding process
  • Solvent-free companding and forming mold for porous propellant and companding process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Put the special soft material for pre-pressing and stretching that has been insulated at 80℃~90℃ into the mold at 85℃~95℃, hold the pressure at 3~5MPa for 8~15min, pressurize to 10MPa~12MPa to press out the soft material, and keep the drug delivery speed stable The equilibrium pressure of the medicine is 8~11MPa; after the pre-compression stretching, keep the mold temperature at 90℃~95℃, pressurize the modified double-base propellant at 80℃~85℃ at 3MPa for 10min, pressurize to 10MPa~12MPa, press Stretching. The equilibrium pressure of the drug discharge is 10.5MPa, and the pressure in the discharge process is stable, which meets the safety requirements. The surface of the drug column is smooth, and the internal structure is dense through X-ray detection, which meets the requirements.

Embodiment 2

[0020] Put the special soft material for pre-pressing and stretching that has been insulated at 80℃~90℃ into the mold at 85℃~95℃, hold the pressure at 3~5MPa for 8~15min, pressurize to 10MPa~12MPa to press out the soft material, and keep the drug delivery speed stable The equilibrium pressure of the medicine is 8-11MPa; after the pre-compression stretching, keep the mold temperature at 90°C-95°C, keep the modified double-base propellant at 80°C-85°C at 3MPa for 10min, and pressurize to 10MPa-12MPa Stretching. The equilibrium pressure of the drug discharge is 11MPa, and the pressure in the discharge process is stable, which meets the safety requirements. The surface of the product column is smooth, and the internal structure is dense through X-ray detection, which meets the requirements.

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Abstract

The invention discloses a solvent-free companding and forming mold for a porous propellant and a companding process, and mainly solves the existing problem of preparation of a porous modified dual-base propellant. The mold disclosed by the invention is machined by turning tempered steel 45# with the smoothness of 1.6 [mu]m, and the preparation is completed by using the mold, a pre-companding process and a conventional process through a soft material special for companding. The solvent-free companding and forming mold is applicable to porous dual-base and modified dual-base propellant filling.

Description

technical field [0001] The invention relates to a propellant solvent-free compression-stretching molding die and process, which are mainly used for forming propellant grains of porous grains to meet the equipment requirements of missiles, rockets and gas generators. Background technique [0002] Porous charge is a commonly used charge type for gun propellant. Due to the large resistance between the charge and the mold during the forming process of the porous charge, the pressure exerted by the press on the charge in the cavity of the mold increases greatly, which is dangerous. Due to the high stability, the solvent-free compression-stretching molding of double-base and modified double-base propellant grains with more than three holes has not been realized so far. Porous gun propellants usually use a solvent to increase the fluidity of the material to reduce the pressure of the material in the mold. After obtaining the target charge, the solvent is removed. However, when the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B25/22C06B21/00C06D5/06B30B15/02
Inventor 王江宁裴江峰宋秀铎谢波郑伟张军孙志刚袁志锋陈俊波
Owner XIAN MODERN CHEM RES INST
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