CN117024226A - Method for controlling flow of casting liquid of granule casting propellant - Google Patents
Method for controlling flow of casting liquid of granule casting propellant Download PDFInfo
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- CN117024226A CN117024226A CN202310877286.0A CN202310877286A CN117024226A CN 117024226 A CN117024226 A CN 117024226A CN 202310877286 A CN202310877286 A CN 202310877286A CN 117024226 A CN117024226 A CN 117024226A
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- casting
- liquid
- propellant
- way valve
- flow
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- 238000005266 casting Methods 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 60
- 239000007788 liquid Substances 0.000 title claims abstract description 54
- 239000003380 propellant Substances 0.000 title claims abstract description 33
- 239000008187 granular material Substances 0.000 title claims description 15
- 239000011344 liquid material Substances 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000003814 drug Substances 0.000 claims description 6
- 238000009489 vacuum treatment Methods 0.000 claims description 5
- 229940079593 drug Drugs 0.000 claims description 2
- 239000008188 pellet Substances 0.000 claims 4
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000003860 storage Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
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Abstract
The application provides a method for controlling the flow of casting liquid of a grain casting propellant, which is characterized in that a discharge hole of a one-way valve is fixed at the other end of a hose, and a feed hole of the one-way valve is connected to a casting liquid container through the hose with a valve. The application aims at changing the characteristic of liquid filling gap flow in the double-propellant granulating and casting process, and adopts the principle of non-return flow of a portable one-way valve to enable casting liquid to flow and stop flow along the process requirement direction. The method can effectively improve the production efficiency, ensure the production safety, reduce the labor intensity of personnel and has important significance for the field.
Description
Technical Field
The application belongs to the technical field of propellant manufacturing, relates to a particle casting propellant, and in particular relates to a particle casting propellant casting liquid flow control method.
Background
The grain casting process has flexible charging form, can realize free charging, can conveniently realize shell bonding charging, has no limit on grain size, and can cast special-shaped grains with complex structures, thereby being widely applied to the preparation and production of modified double-base propellant charging. The process principle of the process is that casting liquid material flows from a storage tank into a mold of a casting tank through a pipeline by utilizing the difference of vacuum degree, so that the liquid material fills gaps among the liquid particles in the mold, and a solid-liquid mixture with higher uniformity is obtained.
The schematic diagram of the casting process is shown in fig. 1, and as can be seen from fig. 1, the casting pipeline is an important channel for connecting the casting mould and the liquid tank, and the casting liquid needs to flow through the casting pipeline to enter the mould to complete the casting operation. The main process flow is shown in fig. 2, and the specific operation is as follows:
firstly, before the casting operation starts, a casting pipeline is connected and fixed with a die bottom cover, and currently, personnel complete operation by means of copper wires and explosion-proof pliers, and the personnel and tools do not contact dangerous materials in the process.
Secondly, under the condition of man-machine isolation, the liquid material is pressed into a casting mould through a casting pipeline by the vacuum pressure difference between the liquid material tank and the casting tank, and in order to prevent incomplete plasticization of the medicine particles and influence the molding quality of the propellant, the casting height of the liquid material is usually about 1cm higher than the upper part of the medicine particles.
Thirdly, after the casting flow is finished, in order to prevent liquid material from flowing back, the pipeline at the end of the mould needs to be closed at first, and at present, operation is completed by personnel by means of copper wires and explosion-proof pliers, the liquid material pipeline is fastened by using the copper wires after 180-degree bending, and because casting liquid material exists in the pipeline, the extrusion effect of personnel on the liquid material exists in the fastening process, so that the risk of the process is high.
In the process of closing the pipeline, personnel need to enter a site, after the operation window of the casting tank is opened, the pipeline filled with casting liquid material is bent and fastened by using a tool, and the personnel possibly causes explosion of the material in the process of tightening the copper wire by pliers, so that the method has the problems of high safety risk, low efficiency, high labor intensity and the like.
In order to solve the above problems, the chinese patent application publication No. CN 108438296a provides an automatic tightening and cutting device and method for a binding belt, in which a motor is used to automatically tighten the binding belt, but the binding belt cannot be effectively installed and positioned, so that complete man-machine isolation of a pipeline sealing link of a granule casting propellant process is difficult to realize, mechanical stimulation to materials still cannot be avoided in the tightening process, and safety risks exist.
Disclosure of Invention
Aiming at the defects existing in the prior art, the application aims to provide a method for controlling the flow of casting liquid of a granule casting propellant, which solves the technical problem that the production efficiency of the control method in the prior art is to be further improved.
In order to solve the technical problems, the application adopts the following technical scheme:
a method for controlling the flow of casting liquid of granular casting propellant features that a one-way valve is used to control the flow of casting liquid.
Specifically, the method comprises the following steps:
and step one, fixing the assembled mould in a casting tank, and fixing one end of a section of hose with the length of 3-5 cm on a tail pipe of a mould bottom cover.
And step two, fixing a discharge hole of the one-way valve at the other end of the hose, and connecting a feed hole of the one-way valve to a casting liquid container through the hose with the valve.
And step three, closing a casting pipeline switch, and respectively carrying out vacuum treatment on the casting tank and the liquid container for 4 hours.
And step four, reducing the vacuum degree in the liquid container according to the technical specification requirements, opening a casting pipeline switch, and closing the casting pipeline switch after the casting liquid is filled in the medicine granule bed.
And fifthly, recovering the pressure in the casting tank and the liquid container to the atmospheric pressure, cutting off the hose below the feed inlet of the one-way valve, and transferring the casting mould to the next process.
The application also has the following technical characteristics:
preferably, the one-way valve is a portable one-way valve.
Preferably, the inner diameter of the hose is in the range of 12mm to 24mm. The method is suitable for the granule casting propellant casting process with various casting flow rates.
Preferably, the inner diameter of the feed inlet of the one-way valve is 8 mm-20 mm; the outer diameter of the one-way valve is in the range of 12 mm-24 mm, and is matched with the inner diameter of the hose. The method is suitable for one-way valve structures of various types.
Preferably, the inner diameter of the die ranges from 40mm to 500mm. The method is suitable for the casting process of the grain casting propellant with various common sizes.
Specifically, the forming process of the granule casting propellant is a gap filling casting process, and casting liquid enters the mould from the bottom under the driving of pressure so as to fill gaps among the medicine granule beds.
Compared with the prior art, the application has the following technical effects:
the method adopts a one-way valve structure to realize the flow control of casting liquid, and provides a subversion thinking for the man-machine isolation process design of the pipeline sealing link of the granule casting propellant casting process.
The method of the application can effectively improve the production efficiency, ensure the production safety, reduce the labor intensity of personnel and has important significance for the field.
Aiming at changing the characteristic of liquid filling gap flow in the double-propellant granulating and casting process, the application adopts the principle of non-return flow of the portable one-way valve to enable the casting liquid to flow and stop flow along the process requirement direction.
The method disclosed by the application can be applied to the process and equipment design of a man-machine isolation process model machine, and is beneficial to the realization of an automatic particle casting propellant forming process.
Drawings
Fig. 1 is a schematic diagram of a casting process.
Fig. 2 is a schematic diagram of the casting process operation.
The following examples illustrate the application in further detail.
Detailed Description
All the materials and equipment in the present application are, unless otherwise specified, all materials and equipment known in the art.
The application has the following overall technical concept: the application provides a casting liquid flow control method based on a one-way valve structure. Firstly, the action principle of the one-way valve for preventing the liquid material from flowing back is that the film is non-return, the characteristic that the casting process liquid material only flows unidirectionally under the drive of pressure difference is highly matched, and the gravity of the liquid material in the die after casting can be utilized to realize sealing; secondly, the one-way valve membrane is made of plastic materials such as polyvinyl chloride, friction generated in the switching process is small, extrusion action on liquid materials is hardly generated, and safety risk is relatively low; in addition, the check valve is small in size, low in cost and easy to replace, is convenient to embed into a casting pipeline, can complete functions without matching an external structure, and can be transported to a subsequent station along with a die. Based on the characteristics, the casting liquid material flow control method has good pipeline sealing effect and process matching performance.
The following specific embodiments of the present application are provided, and it should be noted that the present application is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical scheme of the present application fall within the protection scope of the present application.
Example 1:
the embodiment provides a method for controlling the flow of casting liquid of a particle casting propellant, which comprises the following steps:
step one, fixing the assembled phi 40mm accompanying sample mould in an accompanying sample casting tank, and fixing one end of a section of latex hose with the length of 3cm on a tail pipe of a mould bottom cover.
And step two, a portable one-way valve discharge port with the outer diameter of 8mm of the pipeline is inserted into and fixed at the other end of the hose, and the one-way valve feed port is inserted into a beaker containing casting liquid material through the hose with the valve.
And step three, closing a casting pipeline switch, and respectively carrying out vacuum treatment on the casting tank and the liquid container for 4 hours under the pressure of-0.095 MPa.
And step four, the environmental pressure of the liquid container is increased to-0.035 MPa, a casting pipeline switch is opened, and the casting pipeline switch is closed after the liquid is filled into the drug granule bed.
And fifthly, restoring the pressure in the casting tank and the liquid container to the atmospheric pressure, cutting off the hose below the feed inlet of the one-way valve, and transferring the casting mold to the next process.
The technological operation condition shows that the grain casting propellant casting liquid flow control method based on the check valve can effectively avoid the pipe binding operation of the grain casting propellant accompanying sample, and the check valve is free from blockage and leakage in the technological process.
Example 2:
the embodiment provides a method for controlling the flow of casting liquid of a particle casting propellant, which comprises the following steps:
and step one, fixing the assembled phi 158mm product mould in a product casting tank, and fixing one end of a section of PVC hose with the length of 5cm on a tail pipe of a mould bottom cover.
And step two, a portable one-way valve discharge port with the outer diameter of 12mm of the pipeline is inserted into and fixed at the other end of the hose, and the one-way valve feed port is inserted into a storage tank containing casting liquid material through the hose with a valve.
And step three, closing a casting pipeline switch, and respectively carrying out vacuum treatment on the casting tank and the liquid storage tank for 4 hours under the pressure of-0.095 MPa.
And step four, the pressure in the liquid storage tank is increased to-0.035 MPa, a casting pipeline switch is opened, and the casting pipeline switch is closed after the liquid filling bed is filled with casting liquid.
And fifthly, recovering the pressure in the casting tank and the liquid storage tank to the atmospheric pressure, cutting off the hose below the feed inlet of the one-way valve, and transferring the casting mold to the next process.
The technological operation condition shows that the method for controlling the flow of the casting liquid of the granule casting propellant based on the one-way valve can effectively avoid the pipe-binding operation of the medium-sized product of the granule casting propellant, and the one-way valve has no blockage and no leakage in the technological process.
Example 3:
the embodiment provides a method for controlling the flow of casting liquid of a particle casting propellant, which comprises the following steps:
step one, fixing an assembled phi 360mm cored product mould in a product casting pit, and fixing one end of a section of PVC hose with the length of 5cm on an oil inlet pipe orifice at the top of a mould core.
And step two, a portable one-way valve discharge port with the outer diameter of 12mm of the pipeline is inserted into and fixed at the other end of the hose, and the one-way valve feed port is inserted into a storage tank containing casting liquid material through the hose with a valve.
And step three, closing a casting pipeline switch, and respectively carrying out vacuum treatment on the casting pit and the liquid storage tank for 4 hours under the pressure of-0.095 MPa.
And step four, the pressure in the liquid storage tank is increased to-0.035 MPa, a casting pipeline switch is opened, and the casting pipeline switch is closed after the liquid filling bed is filled with casting liquid.
And fifthly, recovering the pressure in the casting pit and the liquid storage tank to the atmospheric pressure, cutting off the hose above the feed inlet of the one-way valve, and transferring the casting mould to the next working procedure.
The technological operation condition shows that the method for controlling the flow of the casting liquid of the granule casting propellant based on the one-way valve can effectively avoid the pipe-binding operation of the large-scale cored product of the granule casting propellant, and the one-way valve is free from blockage and leakage in the technological process.
Claims (7)
1. A method for controlling the flow of casting liquid of granular casting propellant is characterized in that a one-way valve is adopted to realize the flow control of casting liquid.
2. A method of controlling the flow of a casting liquid of a pellet casting propellant as claimed in claim 1, comprising the steps of:
fixing the assembled mould in a casting tank, and fixing one end of a section of hose with the length of 3-5 cm on a tail pipe of a mould bottom cover;
fixing a discharge hole of a one-way valve at the other end of the hose, and connecting a feed hole of the one-way valve to a casting liquid container through the hose with a valve;
step three, closing a casting pipeline switch, and respectively carrying out vacuum treatment on the casting tank and the liquid container for 4 hours;
step four, reducing the vacuum degree in the liquid material container according to the technical specification requirements, opening a casting pipeline switch, and closing the casting pipeline switch after the casting liquid material fills the drug particle bed;
and fifthly, recovering the pressure in the casting tank and the liquid container to the atmospheric pressure, cutting off the hose below the feed inlet of the one-way valve, and transferring the casting mould to the next process.
3. The method of claim 2, wherein the check valve is a portable check valve.
4. The method of controlling the flow of a casting liquid of a pellet casting propellant as claimed in claim 1, wherein the inner diameter of the hose is in the range of 12mm to 24mm.
5. The method for controlling the flow of casting liquid of the granule casting propellant as claimed in claim 4, wherein the inner diameter of the feed inlet of the one-way valve is 8 mm-20 mm; the outer diameter of the one-way valve is in the range of 12 mm-24 mm, and is matched with the inner diameter of the hose.
6. The method of controlling the flow of a casting liquid of a pellet casting propellant as claimed in claim 1, wherein the inner diameter of the die is in the range of 40mm to 500mm.
7. The method of claim 1, wherein the forming process of the pellet propellant is a gap-filling casting process, and the casting liquid is forced from the bottom into the mold to fill the gaps between the beds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310877286.0A CN117024226A (en) | 2023-07-17 | 2023-07-17 | Method for controlling flow of casting liquid of granule casting propellant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310877286.0A CN117024226A (en) | 2023-07-17 | 2023-07-17 | Method for controlling flow of casting liquid of granule casting propellant |
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| Publication Number | Publication Date |
|---|---|
| CN117024226A true CN117024226A (en) | 2023-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310877286.0A Pending CN117024226A (en) | 2023-07-17 | 2023-07-17 | Method for controlling flow of casting liquid of granule casting propellant |
Country Status (1)
| Country | Link |
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| CN (1) | CN117024226A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2577548A1 (en) * | 1985-02-14 | 1986-08-22 | Poudres & Explosifs Ste Nale | PROCESS AND PLANT FOR THE PRODUCTION OF PROPERGOL BLOCKS BY THE MOLDING METHOD |
| US4653568A (en) * | 1983-03-17 | 1987-03-31 | Fabraze, Inc. | Foundry process and apparatus, including mixing investment composition under vacuum |
| JPH04128004A (en) * | 1990-09-20 | 1992-04-28 | Toto Ltd | Pressure casting molding method |
| CN105081276A (en) * | 2014-05-23 | 2015-11-25 | 戴姆勒股份公司 | Low-pressure casting device and method for operating a low-pressure casting device |
| CN105889555A (en) * | 2016-06-30 | 2016-08-24 | 西安近代化学研究所 | Normally closed pneumatic pipe clamp |
| US20170209920A1 (en) * | 2016-01-22 | 2017-07-27 | Denso Corporation | Vacuum die casting apparatus |
| CN109016105A (en) * | 2017-06-09 | 2018-12-18 | 上海邦聚工程材料技术有限公司 | A kind of wear-resistant ceramic prefabricated component pouring device and casting process |
-
2023
- 2023-07-17 CN CN202310877286.0A patent/CN117024226A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4653568A (en) * | 1983-03-17 | 1987-03-31 | Fabraze, Inc. | Foundry process and apparatus, including mixing investment composition under vacuum |
| FR2577548A1 (en) * | 1985-02-14 | 1986-08-22 | Poudres & Explosifs Ste Nale | PROCESS AND PLANT FOR THE PRODUCTION OF PROPERGOL BLOCKS BY THE MOLDING METHOD |
| JPH04128004A (en) * | 1990-09-20 | 1992-04-28 | Toto Ltd | Pressure casting molding method |
| CN105081276A (en) * | 2014-05-23 | 2015-11-25 | 戴姆勒股份公司 | Low-pressure casting device and method for operating a low-pressure casting device |
| US20170209920A1 (en) * | 2016-01-22 | 2017-07-27 | Denso Corporation | Vacuum die casting apparatus |
| CN105889555A (en) * | 2016-06-30 | 2016-08-24 | 西安近代化学研究所 | Normally closed pneumatic pipe clamp |
| CN109016105A (en) * | 2017-06-09 | 2018-12-18 | 上海邦聚工程材料技术有限公司 | A kind of wear-resistant ceramic prefabricated component pouring device and casting process |
Non-Patent Citations (2)
| Title |
|---|
| 谭惠民: "北京理工大学教育基金会·教授文库 固体推进剂化学与技术", vol. 1, 30 September 2015, 北京理工大学出版社, pages: 389 - 394 * |
| 鲍延年;冯梅;: "熔铸装药弹体后处理设备设计研究", 兵工自动化, no. 04, 15 April 2010 (2010-04-15) * |
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