CN104276910B - A kind of gas generator propellant powder column restricting moulding process - Google Patents
A kind of gas generator propellant powder column restricting moulding process Download PDFInfo
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- CN104276910B CN104276910B CN201310306577.0A CN201310306577A CN104276910B CN 104276910 B CN104276910 B CN 104276910B CN 201310306577 A CN201310306577 A CN 201310306577A CN 104276910 B CN104276910 B CN 104276910B
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Abstract
A kind of gas generator propellant powder column restricting moulding process, comprises the following steps: the spacer identical with restricting thickness is pasted with bottom in the top 1) along powder column periphery; 2) restricting slip is poured in mould, degasification 30 ± 5min under vacuum tightness≤3mmHg condition; 3) powder column pasting spacer is put into mould, place metallic briquette at powder column top and powder column is sunk; 4) treat that restricting slip overflows, after complete wetting powder column, put into 55 ± 5 DEG C of oil bath curing oven 24-36h; 5) after the demoulding, to powder column integer.The present invention solves and adopts traditional pouring forming technology, and too thin because of restricting thickness, between coating mould and powder column gap is too little, during slip casting easy " bridging ", is difficult to shaping problem.The present invention makes powder column easily shaping with ultra-thin restricting, ensure that the homogeneity of restricting thickness simultaneously, is applicable to the Overmolded of ultra-thin restricting.
Description
Technical field
The present invention relates to a kind of restricting moulding technique of servo control mechanism gas generator propellant powder column.
Background technology
Composite solid gasifier has been widely used in the models such as space flight, aviation and missile armament as a kind of auxiliary power source, as servo control mechanism, starter etc.Composite solid gasifier is assembled primarily of parts such as portfire, housing, propellant powder columns.Propellant powder column is then made up of propellant charge and restricting, and the major function of restricting is restriction powder column combustion face, makes it to meet burning inner trajectory curve requirement.Therefore, restricting is except requiring to have except certain mechanical property, adhesiveproperties, and also require can not contain pore in manufacturing processed, thickness needs uniformity.
Conventional restricting manufacturing process is " casting ", propellant powder column by curing molding is fixed in mould, be cast in the gap of powder column and mould after degassed for restricting slime vacuum, but when adopting the method manufacture thickness to be less than the restricting of 1.0mm, because slip " bridging " cannot the reason such as natural levelling, the defect of product can increase considerably, and then is almost difficult to produce qualified product when the ultra-thin restricting of manufacture 0.5 ~ 0.6mm.
Summary of the invention
The object of the invention is to overcome the ultra-thin restricting of existing employing normal pouring manufacture technics, because between powder column and mould, gap is too small, slip easily " bridging ", cannot natural levelling, the macroscopic irregularity of product can increase considerably, cannot the deficiencies such as qualified product be produced, and a kind of gas generator propellant powder column restricting moulding process that effectively can ensure restricting thickness evenness is provided.
Technical solution of the present invention is: comprise the following steps:
1) spacer identical with restricting thickness is pasted with bottom in the top along powder column periphery;
2) restricting slip is poured in mould, degasification 30 ± 5min under vacuum tightness≤3mmHg condition;
3) powder column pasting spacer is put into mould, place metallic briquette at powder column top and powder column is sunk;
4) treat that restricting slip overflows, after complete wetting powder column, put into 55 ± 5 DEG C of oil bath curing oven 24-36h;
5) after the demoulding, to powder column integer.
Described spacer is the rubber sheet of long 10 ± 2mm, wide 2 ± 1mm; Described spacer is pasted onto top and the bottom of powder column side through tackiness agent.
Described spacer totally 8, uniform 4 of powder column periphery top, bottom powder column periphery uniform 4.
The weight of described metallic briquette is 1kg.
In circular arc bottom described powder column.
The present invention compared with prior art beneficial effect is:
(1) by shaping process of pressure injection, solve pouring forming technology when pouring into a mould ultra-thin restricting slip, because the gap between mould and powder column is too small, slip cannot levelling, the problem that visual appearance cannot ensure;
(2) adopt spacer location, make powder column degree of eccentricity less, ensure that the homogeneity of restricting thickness.
Accompanying drawing explanation
Fig. 1 is location of the present invention and confined state schematic diagram.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is view after pressure injection of the present invention.
Fig. 4 is powder column schematic diagram after integer.
In figure, 1, mould, 2, restricting slip, 3, powder column, 4, spacer, 5, metallic briquette, 6, upper integer line, 7, lower integer line, 8, restricting.
Embodiment
Embodiment 1
As shown in Figure 1, 2, the nitrile rubber (thickness 0.50 ± 0.01mm) identical with restricting design thickness is cut to and is about 10mm, the rectangle spacer 4 of wide about 2mm, 730 tackiness agent are adopted to be pasted on the position up and down (each uniform stickup 4, totally 8) of powder column side respectively.The restricting slip 2 prepared quantitatively is poured in mould 1, degasification 30min under vacuum tightness≤3mmHg condition, then the powder column pasting spacer is put into mould, the metallic briquette 5 of 1Kg is placed above, treat that powder column 3 sinks (as shown in Figure 3) completely, restricting slip puts into 55 ± 5 DEG C of oil bath curing oven 24 ~ 36h after overflowing complete wetting powder column, and result shows that restricting 8 visual appearance is good, the defects such as pore-free.After the demoulding, adopt lathe along upper integer line 6, lower integer line 7 by powder column integer to size.After integer, powder column as shown in Figure 4.
Embodiment 2
Be cut to by thickness 0.60 ± 0.01mm paracril and be about 10mm, the rectangle spacer of wide about 2mm, is pasted on powder column side with 730 tackiness agent.
The restricting slip prepared quantitatively is poured in mould, degasification 30min under vacuum tightness≤3mmHg condition, then the powder column pasting spacer is put into mould, the metallic briquette of 1Kg is placed above, treat that powder column sinks completely, restricting slip puts into 55 ± 5 DEG C of oil bath curing oven 24 ~ 36h after overflowing complete wetting powder column, and result shows that restricting visual appearance is good, the defects such as pore-free.Powder column two ends integer is excised by size on request.
Embodiment 3
Be cut to by thickness 0.70 ± 0.01mm paracril and be about 10mm, the rectangle spacer of wide about 2mm, is pasted on powder column side with 730 tackiness agent.
The restricting slip prepared quantitatively is poured in mould, degasification 30min under vacuum tightness≤3mmHg condition, then the powder column pasting spacer is put into mould, the metallic briquette of 1Kg is placed above, treat that powder column sinks completely, restricting slip puts into 55 ± 5 DEG C of oil bath curing oven 24 ~ 36h after overflowing complete wetting powder column, and result shows that restricting visual appearance is good, the defects such as pore-free.Powder column two ends integer is excised by size on request.
Claims (4)
1. a gas generator propellant powder column restricting moulding process, is characterized in that:
Comprise the following steps:
1) spacer identical with restricting thickness is pasted with bottom in the top along powder column periphery;
2) restricting slip is poured in mould, degasification 30 ± 5min under vacuum tightness≤3mmHg condition;
3) powder column pasting spacer is put into mould, place metallic briquette at powder column top and powder column is sunk;
4) treat that restricting slip overflows, after complete wetting powder column, put into 55 ± 5 DEG C of oil bath curing oven 24-36h;
5) after the demoulding, to powder column integer;
Described spacer is the rubber sheet of long 10 ± 2mm, wide 2 ± 1mm; Described spacer is pasted onto top and the bottom of powder column side through tackiness agent.
2. gas generator propellant powder column restricting moulding process according to claim 1, is characterized in that: described spacer 8, uniform 4 of powder column periphery top totally, bottom powder column periphery uniform 4.
3. gas generator propellant powder column restricting moulding process according to claim 1, is characterized in that: the weight of described metallic briquette is 1kg.
4. gas generator propellant powder column restricting moulding process according to claim 1, is characterized in that: in circular arc bottom described powder column.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310306577.0A CN104276910B (en) | 2013-07-22 | 2013-07-22 | A kind of gas generator propellant powder column restricting moulding process |
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| CN201310306577.0A CN104276910B (en) | 2013-07-22 | 2013-07-22 | A kind of gas generator propellant powder column restricting moulding process |
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| CN104276910A CN104276910A (en) | 2015-01-14 |
| CN104276910B true CN104276910B (en) | 2016-03-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645288A (en) * | 2018-05-11 | 2018-10-12 | 湖北航天化学技术研究所 | A kind of Double-working-condition gas generator propellant powder column |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762223A (en) * | 2016-12-18 | 2017-05-31 | 内蒙古航天红峡化工有限公司 | A kind of soft interlayer spacing shaped device of solid rocket motor grain |
| CN109400425B (en) * | 2018-10-25 | 2020-12-08 | 山西北方兴安化学工业有限公司 | Reverse casting die utensil of coating |
| CN109400424B (en) * | 2018-10-25 | 2020-10-09 | 山西北方兴安化学工业有限公司 | Method for coating tubular propellant grain by liquid medium |
| CN110118135B (en) * | 2019-05-22 | 2021-06-15 | 西安近代化学研究所 | Coating layer forming die |
| CN112062648B (en) * | 2020-09-25 | 2023-09-05 | 江南工业集团有限公司 | Grain surface coating device and method |
| CN114716287B (en) * | 2022-04-22 | 2023-04-28 | 湖北航天化学技术研究所 | Protective tool, grain structure and use method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1701858A (en) * | 2005-07-11 | 2005-11-30 | 北京理工大学 | Firework fuel gas driven high speed sprinkling device |
| CN101700427A (en) * | 2009-11-20 | 2010-05-05 | 陕西坚瑞消防股份有限公司 | Hot aerosol fire extinguisher with thermostable ablative-insulative layer and manufacture method |
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2013
- 2013-07-22 CN CN201310306577.0A patent/CN104276910B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1701858A (en) * | 2005-07-11 | 2005-11-30 | 北京理工大学 | Firework fuel gas driven high speed sprinkling device |
| CN101700427A (en) * | 2009-11-20 | 2010-05-05 | 陕西坚瑞消防股份有限公司 | Hot aerosol fire extinguisher with thermostable ablative-insulative layer and manufacture method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645288A (en) * | 2018-05-11 | 2018-10-12 | 湖北航天化学技术研究所 | A kind of Double-working-condition gas generator propellant powder column |
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| CN104276910A (en) | 2015-01-14 |
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