Combined mold and method for preparing casting type explosives and powders

A technology of combining molds and explosives, used in explosives, explosives processing equipment, offensive equipment, etc., can solve the problems of low efficiency, introduced air holes, and large loss, and achieve the effect of improving manufacturing efficiency

Active Publication Date: 2021-05-07
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is: the efficiency of using the flattening process is low, and the flatness of the surface of the general scraped surface is not good, and it is easy to introduce pores in the product by using the flattening process
And it can only be casted in one piece. When manufacturing hollow sheets and round tubes, cutting and bonding are required, which is not efficient and consumes a lot

Method used

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  • Combined mold and method for preparing casting type explosives and powders
  • Combined mold and method for preparing casting type explosives and powders
  • Combined mold and method for preparing casting type explosives and powders

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Clamping Mold Casting Manufacturing of Hollow Tablets

[0053] Goal: To manufacture 3mm thick butylated hydroxybutyrate hollow thin slices, the thin slice size is 200mm*165mm, and the central round hole size is Ф120mm.

[0054] Step 1, manufacture and degass the hydroxybutylated propellant slurry, use 85% solid content HTPB propellant formula, the basic composition of the formula is HTPB binder system: oxidant AP:Al=15:68:17. The components are weighed according to the general pharmaceutical process of butyl-hydroxyl propellant, and fully mixed with a vertical planetary mixer to obtain pourable butyl-hydroxyl propellant slurry. The general vacuum casting process using composite propellants in e.g. figure 2 Vacuum pour 2kg of slurry in the slurry holding mold 1 to complete the degassing of the slurry;

[0055] Step 2, mold clamping and counterflow molding: the figure 1 The counterflow molding die 3 shown is pressed into the figure 2 In the slurry containing mold 1 ...

Embodiment 2

[0058] Pressurized Countercurrent Pouring Manufacturing of Hollow Tablets

[0059] Objective: To manufacture 3mm thick pouring polyether fracturing agent hollow sheets with a size of 180mm*200mm.

[0060] Step 1, making polyether gas-generating drug slurry and degassing, using 80% solid content polyether gas-generating drug formula, the basic composition of the formula is: polyether adhesive system: mixed nitrate plasticizer: oxidizing agent AP: nitric acid Ammonium = 8:12:55:25. The components are weighed according to the general pharmaceutical process of the composite propellant, and fully mixed with a vertical planetary mixer to obtain a pourable polyether gas-generating drug slurry. The general vacuum casting process using composite propellants in e.g. Figure 5 Vacuum pour 3kg of slurry in the pressurized extrusion pouring tank shown to complete the degassing of the slurry;

[0061] Step 2 pressurized counterflow molding: press Figure 5 The method shown properly conn...

Embodiment 3

[0064] Countercurrent Pouring Manufacturing of Silver-embedded Rods

[0065] Objective: To manufacture high-burning-rate HTPB propellant round bar-shaped silver-embedded medicine rod: the diameter of the medicine rod is Ф7mm, the length is 150mm, and the diameter of the silver-embedded wire is Ф0.3mm.

[0066] Step 1, preset silver wire. similar figure 1 For the counter-flow molding mold shown, the drug mold cavity in the counter-flow molding mold is manufactured as a series of semicircular butt joints with a diameter of 7 mm, and silver wire positioning holes are reserved at both ends of the mold, and the counter-flow molding mold is preset with Ф0.3mm silver wire, and tension the silver wire;

[0067] Step 2: Manufacture high burning rate hydroxybutylene propellant slurry and degas;

[0068] Step 3: Pressurized counterflow molding: press Figure 5 The method shown properly connects the lower opening of the pressurized extrusion pouring tank 4 and the counterflow molding ...

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Abstract

The invention discloses a combined mold for preparing casting type explosives and powders, which comprises a reverse flow forming mold and a cartridge type mold, the reverse flow forming mold comprises a hollow shell and a bottom opening arranged at the bottom of the shell, and the reverse flow forming mold can be directly a combined body of the cartridge type mold; the explosive type mold is provided with a hollow mold cavity and openings formed in the two ends of the mold cavity; one or more explosive-shaped section molds are contained in a shell of the countercurrent forming mold, and an opening in one end of each explosive-shaped section mold is in butt joint with an opening in the bottom of the countercurrent forming mold; and under the action of external pressure, slurry without gas in advance under a vacuum condition is upwards injected into a cavity of the explosive type mold through an opening in the bottom of the countercurrent forming mold, and the cavity of the explosive type mold is filled with the slurry. The combined mold is suitable for batch pouring of explosives and powders of various complex fine types.

Description

technical field [0001] The invention relates to the technical field of explosive processing methods and equipment, in particular to a combined mold and method for preparing pouring-type explosives. Background technique [0002] The molding method of pouring type propellant and explosive is to use the viscous slurry to solidify and form by vacuum pouring into the charge cavity of the charge through a vacuum pouring system. Because the pouring slurry often has a certain viscosity, when the cavity size of the drug charge is small or has a special shape, direct pouring will often cause bridges in the pouring slurry, so that the slurry cannot fill the cavity of the charge. Therefore, direct vacuum casting cannot be used for mass production of complex drug types with special shapes such as large-area sheets, special-shaped hollow sheets, slender rods, tubes, and slender drug strips embedded with metal wires. [0003] It is very useful in some occasions for large-area flakes, spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B21/00C06D5/00C06C5/08
CPCC06B21/0058C06D5/00C06C5/08
Inventor 吉志强姚南周重洋李忠友程迪高扬王英英
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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