CN107556146A - A kind of solvent-free companding shaping mould of multi-perforated propellant and pressure stretch technique - Google Patents

A kind of solvent-free companding shaping mould of multi-perforated propellant and pressure stretch technique Download PDF

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Publication number
CN107556146A
CN107556146A CN201710767887.0A CN201710767887A CN107556146A CN 107556146 A CN107556146 A CN 107556146A CN 201710767887 A CN201710767887 A CN 201710767887A CN 107556146 A CN107556146 A CN 107556146A
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mould
solvent
pressure stretch
propellant
pressure
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CN201710767887.0A
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CN107556146B (en
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
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Xian Modern Chemistry Research Institute
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Xian Modern Chemistry Research Institute
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Abstract

The present invention discloses a kind of solvent-free pressure stretch mould of multi-perforated propellant and pressure stretch technique, mainly solves existing porous modified double base propellant and prepares problem.The mould of the present invention uses finish to be formed for the 45# steel turnery processings of 1.6 μm of modifier treatment, is completed using the mould, precompressed stretching process and the special soft material of common process pressure stretch.The present invention is applied to porous biradical and modified double base propellant powder charge.

Description

A kind of solvent-free companding shaping mould of multi-perforated propellant and pressure stretch technique
Technical field
The present invention relates to a kind of solvent-free companding shaping mould of propellant and technique, it is mainly used in the propellant of porous charges Powder column is molded, to meet the equipment Requirement of guided missile, rocket and its gas generator powder charge.
Background technology
Porous charges are the conventional powder charge Types of Medicine of gun propellant, due in porous charges forming process spice and mould it Between resistance it is larger, the pressure that press applies to the spice in cavity body of mould increases considerably, dangerous high, causes not having so far Realize the biradical and solvent-free companding shapings of modified double base propellant powder column more than three holes.Porous gun propellant generally use is molten The mobility of agent increase material is obtained and removes solvent after target powder charge again to reduce spice pressure in mould, but powder column size compared with Internal solvent is difficult to remove completely when big, therefore can not realize big size porous powder charge.Solid propellant typically uses more lists The form of hole tubulose or brush-shaped charge reaches the working effect of porous charges.But more powder charge inner/outer hole burning surfaces are held By chamber pressure it is difficult to design balance, powder column fragmentation is often resulted in before burning terminates, causes momentum to reduce, it is impossible to is met Requirement.
The content of the invention
In view of the shortcomings of the prior art and defect, the present invention provide a kind of porous mold and pressure stretch technique, can be achieved porous The solvent-free companding shaping of modified double base propellant powder charge.
In companding shaping experiment, analysis finds that the frictional resistance between material and mould is to cause material in safe pressure Under (be less than 12.5MPa) basic reason of VISCOUS FLOW can not occur, so, the frictional resistance reduced between material and mould is The basic point of research and innovation of the present invention.Mould finish is higher, and the frictional force between material and mould is smaller.The high material of hardness Mechanical processing process difficulty is big, but finish is easier to meet design requirement.Generally have the two of meta-alkalescence in propellant formulation The catalyst such as number centralite, lead salt, mantoquita, the frictional force between material and mould because the meta-alkalescence of material is changed, The porous modified double base propellant of solvent-free pressure stretch is caused to be difficult to be molded.In order to solve the problems, such as material and mold friction, this hair It is bright to have studied first under certain pressure and hot conditions, the frictional force between material mold material different from identical finish, It was found that finish is the 45# steel of 1.6 μm of modifier treatment, at 65-95 DEG C and under pressurization use condition, frictional force is minimum, therefore chooses Its material as mould.
According to common process, a large amount of companding shapings are carried out using above-mentioned mould and have tested, even if the close peace of pressure stretch load Full limiting pressure 15MPa does not also succeed.In test of many times, Flow of Goods and Materials state, the surface of the different parts from mould are found Finish is different, for this problem, using a kind of and close soft material of propellant material principal component, utilizes the spy of its good fluidity Point, carries out the pre- pressure stretch research close to actual service conditions, and drug pressure load only has 8-9MPa.Use the special soft pre- pressure stretch of material The mould crossed, its surface smoothness is consistent, carries out porous modified double base propellant powder charge pressure stretch, and experiment first use success is real The breakthrough of solvent-free pressure stretch complexity Charge is showed.
The present invention provides a kind of porous solvent-free companding shaping mould of modified double base propellant, including die holder and mould pin, mould Pin is made up of mould punch block and n root mould pins, is designed according to traditional dies and manufacture obtains, wherein n >=3;The mould uses light Cleanliness forms for the 45# steel turnery processings of 1.6 μm of modifier treatment.
The precompressed stretching process of the present invention is to realize material and each orientation frictional force of mould uniformly necessary link, using main Composition and the special soft material of the pre- pressure stretch of the close common process of modified double base propellant, pressure stretch can once be completed.Soft material quality hundred Divide than composition and be:58% nitrocotton, 17% dinitrotoluene (DNT), 17% dibutyl phthalate, 2% vaseline, in 3% No. two Determine agent and 3% calcium carbonate.Pressure stretch technique concrete operation step is:
(1) the special soft material of 80 DEG C~90 DEG C pre- pressure stretch are loaded into 85 DEG C~95 DEG C moulds, 3~5MPa, 8~15min of pressurize, It is forced into 10MPa~12MPa to extrude soft material, it is 8~11MPa to keep the speed stable drug balance pressure of drug;
(2) 80 DEG C~90 DEG C modified double base propellants are loaded into 85 DEG C~95 DEG C moulds, 3~5MPa, 8~15min of pressurize, 10MPa~12MPa is forced into, obtains porous modified double base propellant powder charge.
The advantage of the invention is that:The solvent-free pressure stretch that perforated sectional powder column can be achieved is molded safely, and its drug pressure is 8 ~11MPa, the pressure stretch safe pressure less than 12.5MPa, ensure that product quality ensures safety simultaneously.
Brief description of the drawings
Fig. 1 is the solvent-free companding shaping mould schematic diagram of propellant
Fig. 2 is the profile of mould pin
Fig. 3 a, Fig. 3 b are die holder top view and profile
Fig. 4 a, Fig. 4 b are respectively stereogram, the profile of four hole modified double base propellant objects
Embodiment
The present invention is further explained below by embodiment.
In embodiment, 45# steel of the finish for 1.6 μm of modifier treatment is used, routinely mold design and turnery processing obtain To the punch die of plum blossom-shaped four, schematic diagram is shown in Fig. 1, mould pin such as Fig. 2, die holder such as Fig. 3 a, Fig. 3 b, is prepared such as Fig. 4 a, Fig. 4 b institute Show propellant loading object.The pre- special soft material formula of pressure stretch is:58% nitrocotton, 17% dinitrotoluene (DNT), 17% adjacent benzene two Formic acid dibutyl ester, 2% vaseline, 3% dimethyldiphenylurea and 3% calcium carbonate.
Embodiment 1
The special soft material of the pre- pressure stretch of 80 DEG C~90 DEG C good heat insulations is loaded into 85 DEG C~95 DEG C moulds, 3~5MPa pressurizes 8~ 15min, it is forced into 10MPa~12MPa and extrudes soft material, it is 8~11MPa to keep the speed stable drug balance pressure of drug; After pre- pressure stretch terminates, 90 DEG C~95 DEG C of mold temperature is kept, by 80 DEG C~85 DEG C modified double base propellant 3MPa pressurize 10min, It is forced into 10MPa~12MPa, companding shaping.Drug balance pressure is 10.5MPa, and discharging pressure process is steady, and meeting safety will Ask, product grain surface is smooth, internal to visit that to penetrate observation structure closely knit through X-ray, meets the requirements.
Embodiment 2
The special soft material of the pre- pressure stretch of 80 DEG C~90 DEG C good heat insulations is loaded into 85 DEG C~95 DEG C moulds, 3~5MPa pressurizes 8~ 15min, it is forced into 10MPa~12MPa and extrudes soft material, it is 8~11MPa to keep the speed stable drug balance pressure of drug; After pre- pressure stretch terminates, 90 DEG C~95 DEG C of mold temperature is kept, by 80 DEG C~85 DEG C modified double base propellants in 3MPa pressurizes 10min, it is forced into 10MPa~12MPa companding shapings.Drug balance pressure is 11MPa, and discharging pressure process is steady, meets peace Complete to require, product grain surface is smooth, internal to visit that to penetrate observation structure closely knit through X-ray, meets the requirements.

Claims (3)

1. a kind of solvent-free companding shaping mould of multi-perforated propellant, including die holder and mould pin, mould pin is by mould punch block and n root mould pin groups Into, design and manufacture according to traditional dies and obtain, wherein n >=3;It is characterized in that the mould uses finish as 1.6 μm The 45# steel turnery processings of modifier treatment form.
2. a kind of solvent-free pressure stretch technique of multi-perforated propellant, it is characterised in that the mould uses finish as 1.6 μm of quenched places The 45# steel turnery processings of reason form, and comprise the following steps that:
(1) 80 DEG C~90 DEG C pre- special soft material of pressure stretch are loaded into 85 DEG C~95 DEG C moulds, 3~5MPa, 8~15min of pressurize, pressurization Soft material is extruded to 10MPa~12MPa, it is 8~11MPa to keep the speed stable drug balance pressure of drug;
(2) 80 DEG C~90 DEG C modified double base propellants are loaded into 85 DEG C~95 DEG C moulds, 3~5MPa, 8~15min of pressurize, pressurization To 10MPa~12MPa, porous modified double base propellant powder charge is obtained.
3. solvent-free pressure stretch technique according to claim 2, it is characterised in that the pre- pressure stretch in the step (1) is special soft Material mass percent, which forms, is:58% nitrocotton, 17% dinitrotoluene (DNT), 17% dibutyl phthalate, 2% vaseline, 3% dimethyldiphenylurea and 3% calcium carbonate.
CN201710767887.0A 2017-08-31 2017-08-31 Solvent-free pressing and stretching forming die and pressing and stretching process for multi-hole propellant Active CN107556146B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020133956A1 (en) * 2018-12-29 2020-07-02 湖北航鹏化学动力科技有限责任公司 Porous gas-generating agent molded product and preparation process therefor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102584506A (en) * 2012-01-16 2012-07-18 南京理工大学 Modular smokeless firework emission ammunition with multi-hierarchy hole structure and preparation method for modular smokeless firework emission ammunition
CN105585395A (en) * 2016-02-26 2016-05-18 湖北三江航天红林探控有限公司 Automatic lift type drug pressing device
CN205653365U (en) * 2016-05-20 2016-10-19 泸州北方化学工业有限公司 Program control bar -shaped propellant powder forming die that ftractures

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102584506A (en) * 2012-01-16 2012-07-18 南京理工大学 Modular smokeless firework emission ammunition with multi-hierarchy hole structure and preparation method for modular smokeless firework emission ammunition
CN105585395A (en) * 2016-02-26 2016-05-18 湖北三江航天红林探控有限公司 Automatic lift type drug pressing device
CN205653365U (en) * 2016-05-20 2016-10-19 泸州北方化学工业有限公司 Program control bar -shaped propellant powder forming die that ftractures

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020133956A1 (en) * 2018-12-29 2020-07-02 湖北航鹏化学动力科技有限责任公司 Porous gas-generating agent molded product and preparation process therefor

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