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Combustible cartridge case/box slurry formula and preparation method of combustible cartridge case/box

A cartridge and formula technology, which is applied in the directions of non-explosive filler/gelling agent/thickener, explosives processing equipment, non-explosive/non-thermal agent components, etc., can solve the problem of poor heat resistance, high hygroscopicity and poor flexibility and other problems, to achieve the effect of improving heat resistance time and energy, reducing moisture absorption rate and high precision

Active Publication Date: 2022-02-08
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of raw materials and preparation methods, the current preparation of combustible cartridges requires the design and processing of molding molds, and the flexibility of the preparation process is poor. Combustible cartridges are generally in the shape of simple cylinders, and the products have poor heat resistance and low energy. High hygroscopicity
[0004] Syal[Syal R K,Narr P S.Cook Off Study of Combustible Cartridge Cases[J].Defence Science Journal,2013,42(2):113-116.] studied the heat resistance and self-ignition time of combustible cartridges, the experiment It was found that the self-ignition time of the uncoated combustible cartridge was only 1.1s when the test temperature was 245°C, while the maximum spontaneous combustion time of the coated combustible cartridge was only 4s, indicating that the combustible cartridge with nitrocellulose as the main component poor heat resistance

Method used

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  • Combustible cartridge case/box slurry formula and preparation method of combustible cartridge case/box
  • Combustible cartridge case/box slurry formula and preparation method of combustible cartridge case/box
  • Combustible cartridge case/box slurry formula and preparation method of combustible cartridge case/box

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The formula of the present embodiment is as follows: 100 parts of epoxy acrylic resin, 3 parts of TPO photoinitiator, 40 parts of 2-(2-ethoxyethoxy) ethyl acrylate reactive diluent, RDX crystal (average particle size 30 μm) 100 copies. The preparation steps are as follows:

[0030] (1) Mix all the components with a stirrer in the dark for 1 hour at a speed of 200 rpm;

[0031] (2) Pour the uniformly mixed material into the trough of the SLA 3D printer (Form 3SLA printer of model formlabs), and the laser wavelength of the printer is 405nm;

[0032] (3) Select the model of the combustible cartridge to print (generate the model in the cura software), such as figure 1 As shown, use SLA3D printer to print;

[0033] (4) Remove the printed cartridge from the forming platform and clean it with ethanol or glycerin;

[0034] (5) Place the cartridge under a UV curing lamp for 3 hours of light.

Embodiment 2

[0036] Different from Example 1, the formula of this embodiment is as follows: 60 parts of epoxy acrylic resin, 40 parts of polyurethane acrylic resin, 3 parts of TPO-L photoinitiator, 50 parts of trimethylolpropane triacrylate reactive diluent 152 parts of RDX crystals (average particle size 50 μm).

[0037] The difference between the preparation process and Example 1 is that the model is as figure 2 Shown is a combustible cartridge for a solid propellant motor igniter.

Embodiment 3

[0039] Different from Example 1, the mass ratio of this example is as follows: 50 parts of epoxy acrylic resin, 50 parts of epoxy acrylic resin, 4 parts of TPO-L photoinitiator, 2-(2-ethoxyethoxy ) 40 parts of ethyl acrylate reactive diluent, 20 parts of trimethylolpropane triacrylate reactive diluent, 246 parts of RDX crystal (average particle size 70 μm).

[0040] The difference between the preparation process and Example 1 is that the model is as image 3 Shown is a combustible cartridge for countersunk ammunition.

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Abstract

The invention provides a combustible cartridge case / box slurry formula and a preparation method of a combustible cartridge case / box. The formula comprises 100 parts of acrylic resin, 1-4 parts of a photoinitiator, 40-100 parts of a reactive diluent and 100-246 parts of explosive crystals, wherein the explosive crystals are one or a mixture of 1, 3, 5-trinitro-1, 3, 5-triazacyclohexane and 1, 3, 5, 7-tetranitro-1, 3, 5, 7-tetraazacyclooctane, the acrylic resin is epoxy acrylic resin, polyurethane acrylic resin or a mixture of the epoxy acrylic resin and the polyurethane acrylic resin, the photoinitiator is one or a mixture of 2, 4, 6-trimethylbenzoyl phenyl phosphonic acid ethyl ester and 4, 6-trimethylbenzoyl-diphenyl phosphine oxide, and the reactive diluent is one or a mixture of 2-(2-ethyoxyl ethyoxyl) ethyl acrylate and trimethylolpropane triacrylate. The formula provided by the invention can be used for 3D printing preparation. The powder force of the prepared combustible cartridge case / box reaches 845 J / g, the 5s explosion point is 356.6 DEG C, the spontaneous combustion resistance temperature at the temperature of 245 DEG C is larger than 300 s, and the hygroscopicity under the conditions that the temperature is 25 DEG C and the relative humidity is 89% is 0.5%.

Description

technical field [0001] The invention relates to combustible cartridge / box technology, in particular to a combustible cartridge / box slurry formula and related preparation method suitable for 3D printing technology. Background technique [0002] Combustible cartridges / boxes include combustible cartridges and combustible cartridges, both of which are made of combustible materials and are used to hold propellant powder or solid rocket motor igniter ignition powder. During launch or ignition, the combustible cartridge / box can be All burnt without leaving a residue. [0003] The main energy component used in the manufacture of combustible cartridges / boxes in the prior art is nitrocellulose, and the method used is mainly the preparation method of suction filtration molding. Due to the limitation of raw materials and preparation methods, the current preparation of combustible cartridges requires the design and processing of molding molds, and the flexibility of the preparation proc...

Claims

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Application Information

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IPC IPC(8): C06B25/34C06B23/00C06B21/00B33Y10/00B33Y70/00
CPCC06B25/34C06B23/001C06B21/0033B33Y10/00B33Y70/00
Inventor 杨伟涛胡睿杨建兴李曼曼肖霞梁磊
Owner XIAN MODERN CHEM RES INST
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