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A low specific pressure shaped explosive and its forming process

A technology of explosives and specific pressure, which is applied in the field of explosives and can solve the problems of explosive crystal fracture damage and safety that cannot meet the requirements of use.

Active Publication Date: 2021-08-20
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, although defects such as cracks and cavities are reduced in the high specific pressure forming process, it brings crystal fracture damage of explosives.
Therefore, the launch safety of HMX-based press-packed explosives cannot meet the requirements for high-speed launch of the anti-injury warhead of the rifled gun

Method used

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  • A low specific pressure shaped explosive and its forming process
  • A low specific pressure shaped explosive and its forming process
  • A low specific pressure shaped explosive and its forming process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1.1 The present invention is implemented with reference to the following mass percentage composition:

[0023]

[0024] 1.2 Preparation process

[0025] Step 1. Preparation of binder solution: Add 500ml of ethyl acetate to a 2L reaction kettle; add 80g of methyl vinyl silicone rubber and 15g of ethylene-vinyl acetate copolymer to ethyl acetate in sequence, at 50°C Stir at high temperature for 1 h until the methyl vinyl silicone rubber and ethylene-vinyl acetate copolymer are dissolved to obtain a binder solution.

[0026] Step 2. Heat the temperature of the kneading tank to 60°C, add 900g of HMX and 500ml of anhydrous ethyl acetate, stir for 15 minutes, add the solution obtained in step 1 and 5g of dioctyl sebacate, and heat up to 75°C , kneading for 20min. Discharge, obtain the explosive slurry after insensitive coating.

[0027] Step 3, granulation: naturally cool the explosive slurry obtained in step 2 to room temperature, volatilize the solvent under ventilate...

Embodiment 2

[0034] 2.1 The present invention is implemented with reference to the following mass percentage composition:

[0035]

[0036] 2.2 Preparation process

[0037] Step 1. Preparation of binder solution: Add 500ml of ethyl acetate to a 2L reaction kettle; add 55g of methyl vinyl silicone rubber and 20g of ethylene-vinyl acetate copolymer to ethyl acetate in turn, at a temperature of 60°C Stir under stirring for 1 h until the methyl vinyl silicone rubber and ethylene-vinyl acetate copolymer are dissolved to obtain a binder solution.

[0038] Step 2: Heat the temperature of the kneading tank to 60°C, add 920g of HMX and 500ml of anhydrous ethyl acetate, stir for 15 minutes, add the solution obtained in step 1 and 5g of dioctyl sebacate, and heat up to 85°C. Knead for 20min. Discharge, obtain the explosive slurry after insensitive coating.

[0039] Step 3, granulation: naturally cool the explosive slurry obtained in step 2 to room temperature, volatilize the solvent under venti...

Embodiment 3

[0046] 3.1 The present invention is implemented with reference to the following mass percentage composition:

[0047]

[0048] 3.2 Preparation process:

[0049] Step 1. Preparation of binder solution: Add 500ml of ethyl acetate to a 2L reaction kettle; add 80g of methyl vinyl silicone rubber and 30g of ethylene-vinyl acetate copolymer to ethyl acetate in turn, at a temperature of 50°C Stir under stirring for 1 h until the methyl vinyl silicone rubber and ethylene-vinyl acetate copolymer are dissolved to obtain a binder solution.

[0050] Step 2: Heat the temperature of the kneading tank to 60°C, add 880g of HMX and 500ml of anhydrous ethyl acetate, stir for 15 minutes, add the solution obtained in step 1 and 10g of dioctyl sebacate, and raise the temperature to 85°C. Knead for 20min. Discharge, obtain the explosive slurry after insensitive coating.

[0051] Step 3, granulation: naturally cool the explosive slurry obtained in step 2 to room temperature, volatilize the sol...

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Abstract

The invention discloses a low specific pressure molding explosive and its molding process. The components and mass percentages are composed of 88% to 92% of HMX, 2% to 3% of ethylene-vinyl acetate copolymer, and 5.5% of methyl vinyl silicone rubber. %~8%, dioctyl sebacate 0.5%~1%. The explosive modeling powder prepared by the invention can be molded under low specific pressure, and the anti-launch overload performance of the explosive charge is significantly improved. The invention mainly relates to a low-specific-pressure shaped explosive, which is mainly used for the charge of shells, and is especially suitable for the charge of the anti-injury warhead of a large-caliber rifled gun.

Description

technical field [0001] The invention belongs to the field of explosives, and in particular relates to a low-specific-pressure molded explosive and a molding process thereof, which are mainly used for charging artillery shells, and are especially suitable for charging a large-caliber rifled artillery anti-injury warhead. Background technique [0002] Artillery can be divided into rifled guns and smoothbore guns according to the barrel structure. Among them, rifled guns can effectively ensure the stability of projectiles and increase the range of fire. Therefore, most modern artillery are rifled guns. However, when rifled guns (especially large-caliber guns) are fired in the bore, the explosives in the projectiles must bear extremely high axial launch overload (about 300MPa), and at the same time bear the combined effects of radial overload and tangential overload, so , general high-energy explosives are difficult to withstand such a high launch overload, and it is easy to cau...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B25/34C06B21/00C06B23/00
CPCC06B21/0066C06B23/005C06B23/009C06B25/34
Inventor 董军王晓峰王伟力席鹏邢江涛谭波杜茂华黄亚峰杨雄赵凯
Owner XIAN MODERN CHEM RES INST
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