Starting mix preparation system and starting mix preparation method

Abstract

The invention provides a starting mix preparation system. The starting mix preparation system comprises a gas driving mechanism, a material quantifying mechanism, a mixing mechanism, an extrusion pelletizing device and a drying mechanism. The gas driving mechanism provides gas for the material quantifying mechanism and the medicine mixing mechanism, and the gas serves as gas driving force for driving materials to move. The material quantifying mechanism comprises a material storage device and a weighing device, the gas driving mechanism conveys single materials in the material storage device to the weighing device through gas driving force, and the weighing device measures and weighs the single materials according to a preset proportion and conveys the single materials to the medicine mixing mechanism. The explosive mixing mechanism is connected with the extrusion pelletizing device, and is used for mixing all the single materials to form initial starting mix and conveying the initial starting mix to the extrusion pelletizing device. And the extrusion pelletizing device is connected with the drying mechanism, extrudes the initial starting mix according to the preset size to form the starting mix with the target size, and conveys the starting mix to the drying mechanism. The drying mechanism is used for drying the starting mix with the target size to form the target starting mix.

Description

Technical Field

[0001] This application relates to the field of automotive airbag gas generator technology, specifically to a propellant preparation system and a propellant preparation method. Background Technology

[0002] The ignition propellant used in automotive airbag gas generators is a civilian pyrotechnic agent. Its function is to absorb the ignition energy of the ignition device, ignite it instantly, and release high-temperature and high-pressure gas to ignite the gas-generating propellant in the gas generator or break through the sealing plate of the compressed gas.

[0003] Commonly used propellants in the airbag generator industry include boron-based and pentaaminotetrazole-based propellants. The manufacture of boron-based and pentaaminotetrazole-based propellants involves different processes. Because boron-based propellants have relatively high sensitivity, their manufacturing process primarily uses wet mixing, and granulation is mostly manual, resulting in low production efficiency. In contrast, the manufacturing process of pentaaminotetrazole-based propellants is a dynamic mechanical process involving friction between the material and the mechanical structure. The higher mechanical sensitivity of these agents poses a greater safety risk during production. Furthermore, there is significant waste before and after stabilization and extrusion, resulting in a low yield.

[0004] Therefore, how to improve the manufacturing efficiency of propellant, as well as the stability and yield of the manufacturing process, has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] This application provides a propellant preparation system to address the issues in the prior art regarding how to improve the manufacturing efficiency of propellant, as well as the stability and yield of the manufacturing process.

[0006] This application provides a propellant preparation system, including: a gas driving mechanism, a material metering mechanism, a mixing mechanism, an extrusion pelletizing device, and a drying mechanism;

[0007] The gas driving mechanism is connected to the material metering mechanism and the drug mixing mechanism respectively, and is used to provide gas to the material metering mechanism and the drug mixing mechanism respectively, so as to use the gas as a gas driving force to drive the material movement;

[0008] The material metering mechanism includes multiple storage devices and multiple weighing devices. Each storage device is connected to the gas driving mechanism, and the storage devices and weighing devices are connected accordingly. The weighing devices are connected to the mixing mechanism. The gas driving mechanism uses gas driving force to transport the single material corresponding to the storage device to the corresponding weighing device. The weighing device weighs the corresponding single material according to a preset ratio and delivers each single material to the mixing mechanism.

[0009] The mixing mechanism is connected to the extrusion pelletizing device and is used to mix the individual materials by the gas driving force to form an initial ignition charge, and to transport the initial ignition charge to the extrusion pelletizing device.

[0010] The extrusion pelletizing device is connected to the drying mechanism. The extrusion pelletizing device extrudes the initial ignition charge according to the preset size to form ignition charge of the target size, and then conveys the ignition charge of the target size to the drying mechanism.

[0011] The drying mechanism is used to dry the target-sized ignition charge to form the target ignition charge.

[0012] Preferably, the gas drive mechanism includes multiple sets of air pump filter assemblies, each set of air pump filter assemblies including a filter device, a drive air pump, a first delivery pipeline and a second delivery pipeline;

[0013] The filter device is connected to the drive air pump through the first delivery pipeline, and the filter device is used to filter and purify the outside air and supply it to the drive air pump.

[0014] The driving air pump is connected to the storage device and the mixing mechanism through the second delivery pipeline. The driving air pump can generate gas as a driving force to move the material in the storage device and the mixed material in the mixing mechanism, so as to transport the individual material to the corresponding weighing device and mix the individual materials.

[0015] Preferably, the material metering mechanism further includes multiple suction heads and multiple third conveying pipelines, each suction head being connected to the storage device via the third conveying pipeline to suction various raw materials into the corresponding storage device.

[0016] Preferably, the storage device includes a storage tank, a feed valve, a level sensor, and a discharge pipeline;

[0017] The storage tank is used for storing materials;

[0018] The feed valve is located at the top of the storage tank and is connected to the second conveying pipeline;

[0019] The material level sensor includes a sensing end and a display end. The sensing end is disposed inside the storage tank, and the display end is disposed outside the storage tank. It is used to display the position and height of the single material in the storage tank as sensed by the sensing end.

[0020] The discharge pipe is located at the bottom of the storage tank and is connected to the weighing device.

[0021] Preferably, the weighing device includes a metering sensor, a proportioning adjustment valve, a material box, a release valve, and a fourth conveying pipeline;

[0022] The proportioning adjustment valve is connected to the discharge pipeline and the material box. The proportioning adjustment valve releases each of the individual materials in the discharge pipeline to the material box according to the preset proportion.

[0023] The metering sensor is located at the bottom of the material box. The metering sensor is used to weigh and determine whether the metering of the single material in the material box is compatible with the preset ratio metering, and to open the release valve when compatible.

[0024] The release valve is disposed between the material box and the fourth conveying pipeline;

[0025] The fourth delivery pipeline is connected to the material box and the mixing mechanism.

[0026] Preferably, the mixing mechanism includes: a mixing valve port, a mixing pressurizing air pump, and a mixing chamber tank;

[0027] Multiple fourth delivery pipelines converge at one end of the mixing valve port, and the other end of the mixing valve port is connected to the mixing pressurizing air pump and the mixing chamber tank, so as to transport the mixed material from the mixing valve port to the mixing chamber tank through the mixing pressurizing air pump. At the same time, the mixing pressurizing air pump is connected to the gas drive mechanism to mix the mixed material in the mixing chamber tank through the generated gas.

[0028] Preferably, the extrusion pelletizing device includes: an extrusion mechanism, a conveyor belt, multiple sets of blowers, a cooling assembly, a cutting assembly, and a vibrating screen;

[0029] The extrusion mechanism is connected to the mixing mechanism to extrude the initial ignition charge provided by the mixing mechanism.

[0030] Multiple sets of the blower, the cooling assembly, and the cutting assembly are arranged sequentially along the conveyor belt, and the extruded initial ignition propellant is sequentially conveyed to the blower, the cooling assembly, and the cutting assembly; the blower is used to dry the initial ignition propellant, the cooling assembly is used to cool the initial ignition propellant, and the cutting assembly is used to cut the initial ignition propellant;

[0031] The vibrating screen has holes of different sizes to screen the cut initial propellant according to the preset size.

[0032] Preferably, the extrusion mechanism includes: a servo press, a drive shaft, a pressing piston, a receiving cavity, a vacuum inlet, and an extrusion die;

[0033] The servo press is located at the top of the accommodating cavity;

[0034] The pressurizing piston is movably disposed within the accommodating cavity; the ignition propellant is housed within the accommodating cavity;

[0035] The drive shaft is connected to the drug-pressing piston and the servo press;

[0036] The extrusion die is disposed at the end of the receiving cavity;

[0037] The vacuum suction port is disposed on the wall of the accommodating cavity and is located close to the vacuum suction port.

[0038] Preferably, the device further includes a mixing mechanism disposed between the extrusion pelletizing device and the drying mechanism, the mixing mechanism being used to mix the propellant of the target size.

[0039] This application also provides a method for preparing a ignition source, applied to the aforementioned ignition source preparation system, comprising:

[0040] The material is conveyed to the material metering mechanism by the gas driving force generated by the gas driving mechanism;

[0041] The material metering mechanism weighs the corresponding single material according to the preset ratio, and then the single material is transported to the mixing mechanism and mixed under the drive of the gas driving force to form the initial ignition charge.

[0042] The initial propellant is fed to an extrusion pelletizing device to extrude the initial propellant according to a preset size to form a propellant of target size, and the propellant of target size is fed to a mixing mechanism.

[0043] The mixing mechanism mixes the target-sized propellant and conveys it to the drying mechanism.

[0044] The target-sized ignition charge is dried by the drying mechanism to form the target ignition charge.

[0045] Compared with the prior art, this application has the following advantages:

[0046] This application provides a propellant preparation system, including: a gas-driven mechanism, a material metering mechanism, a mixing mechanism, an extrusion pelletizing device, and a drying mechanism. The gas-driven mechanism is connected to both the material metering mechanism and the mixing mechanism, providing gas to both as the driving force for material movement. The material metering mechanism includes multiple storage devices and multiple weighing devices. Each storage device is connected to the gas-driven mechanism, and the storage devices and weighing devices are correspondingly connected. The weighing devices are also connected to the mixing mechanism. The gas-driven mechanism uses gas to transport individual materials from the corresponding storage devices to the corresponding weighing devices. The weighing devices weigh the corresponding individual materials according to a preset ratio and then convey each individual material to the mixing mechanism. The mixing mechanism is connected to the extrusion pelletizing device and uses gas to mix the individual materials to form an initial propellant, then conveys the initial propellant to the extrusion pelletizing device. The extrusion pelletizing device is connected to the drying mechanism. The extrusion pelletizing device extrudes the initial ignition transfer charge according to a preset size to form ignition transfer charge of the target size, and then conveys the ignition transfer charge of the target size to the drying mechanism. The drying mechanism is used to dry the ignition transfer charge of the target size to form the target ignition transfer charge.

[0047] This application's ignition propellant preparation system can be understood as solving the safety and production capacity issues in ignition propellant production. Within the same building area, it can expand production capacity several times or even ten times, while simultaneously increasing product yield and quality. Automatic weighing and mixing not only allows for traceability of the actual feeding of each material and batch, but also reduces labor costs and operational errors caused by human intervention, as well as occupational disease prevention and workshop environmental pollution. The gas-driven material movement not only achieves mixing efficiency several times higher than mechanical mixing, but also results in more uniform mixing. The semi-dry mixing process, compared to dry mixing, not only reduces safety risks but also allows for mixing more batches of products at once, balancing product quality and increasing production capacity. The use of a water bath forced-air drying oven avoids accidental combustion of materials due to excessively high temperatures, ensuring production safety while improving drying efficiency and increasing the quantity dried at one time. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of a propellant preparation system provided in the first embodiment of this application.

[0049] Figure 2 This is a schematic diagram of the gas-driven mechanism, material metering mechanism, and drug mixing mechanism provided in the embodiments of this application.

[0050] Figure 3 This is a schematic diagram of the extrusion pelletizing device provided in the embodiments of this application.

[0051] Figure 4This is a schematic diagram of the extrusion mechanism provided in the embodiments of this application.

[0052] Figure 5 This is a flowchart of a method for preparing a propellant according to the second embodiment of this application.

[0053] Figure label:

[0054] Gas-driven mechanism 1, filter device 11, drive air pump 12, first conveying pipeline 13, second conveying pipeline 14, dust removal device 15, material metering mechanism 2, suction head 21, third conveying pipeline 22, storage device 3, storage tank 31, weighing device 4, material box 41, fourth conveying pipeline 42, mixing mechanism 5, mixing pressurizing air pump 51, mixing chamber 52, extrusion pelletizing device 6, extrusion mechanism 61, servo press 611, drive shaft 612, pressing piston 613, accommodating chamber 614, vacuum suction port 615, extrusion die head 616, conveyor belt 62, blower 63, cooling assembly 64, cutting assembly 65, vibrating screen 66, mixing mechanism 7, drying mechanism 8, ignition powder 9. Detailed Implementation

[0055] Many specific details are set forth in the following description to provide a full understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below.

[0056] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] Commonly used propellants in the airbag generator industry include boron-based and pentaaminotetrazole-based propellants. The manufacture of boron-based and pentaaminotetrazole-based propellants involves different processes. Because boron-based propellants have relatively high sensitivity, their manufacturing process primarily uses wet mixing, and granulation is mostly manual, resulting in low production efficiency. In contrast, the manufacturing process of pentaaminotetrazole-based propellants is a dynamic mechanical process involving friction between the material and the mechanical structure. The higher mechanical sensitivity of these agents poses a greater safety risk during production. Furthermore, there is significant waste before and after stabilization and extrusion, resulting in a low yield.

[0059] Accordingly, this application provides a propellant preparation system, comprising: a gas-driven mechanism 1, a material metering mechanism 2, a mixing mechanism 5, an extrusion pelletizing device 6, and a drying mechanism 8. The gas-driven mechanism 1 is connected to both the material metering mechanism 2 and the mixing mechanism 5, providing gas to both mechanisms to drive the material movement. The material metering mechanism 2 includes multiple storage devices 3 and multiple weighing devices 4. Each storage device 3 is connected to the gas-driven mechanism 1, and the storage devices 3 and weighing devices 4 are correspondingly connected. The weighing devices 4 are connected to the mixing mechanism 5. The gas-driven mechanism 1 uses gas to transport individual materials from the corresponding storage devices 3 to the corresponding weighing devices 4. The weighing devices 4 weigh the corresponding individual materials according to a preset ratio and then convey each individual material to the mixing mechanism 5. The mixing mechanism 5 is connected to the extrusion pelletizing device 6 and uses gas to mix the individual materials to form an initial propellant, then conveys the initial propellant to the extrusion pelletizing device 6. The extrusion pelletizing device 6 is connected to the drying mechanism 8. The extrusion pelletizing device 6 extrudes the initial ignition transfer charge according to the preset size to form the ignition transfer charge of the target size, and then conveys the ignition transfer charge of the target size to the drying mechanism 8. The drying mechanism 8 is used to dry the ignition transfer charge of the target size to form the target ignition transfer charge.

[0060] This application's ignition propellant preparation system can be understood as solving the safety and production capacity issues in ignition propellant production. Within the same building area, it can expand production capacity several times or even ten times, while simultaneously increasing product yield and quality. Automatic weighing and mixing not only allows for traceability of the actual feeding of each material and batch, but also reduces labor costs and operational errors caused by human intervention, as well as occupational disease prevention and workshop environmental pollution. The gas-driven material movement not only achieves mixing efficiency several times higher than mechanical mixing, but also results in more uniform mixing. The semi-dry mixing process, compared to dry mixing, not only reduces safety risks but also allows for mixing more batches of products at once, balancing product quality and increasing production capacity. The use of a water bath forced-air drying oven avoids accidental combustion of materials due to excessively high temperatures, ensuring production safety while improving drying efficiency and increasing the quantity dried at one time.

[0061] Next, the propellant preparation system provided in this application will be described in detail with reference to the accompanying drawings. Among them, Figure 1 This is a schematic diagram of a propellant preparation system provided in the first embodiment of this application. Figure 2 This is a schematic diagram of the gas-driven mechanism, material metering mechanism, and drug mixing mechanism provided in the embodiments of this application. Figure 3 This is a schematic diagram of the extrusion pelletizing device provided in the embodiments of this application. Figure 4 This is a schematic diagram of the extrusion mechanism provided in the embodiments of this application.

[0062] First Embodiment

[0063] like Figures 1 to 4 As shown, this application provides a propellant preparation system, including: a gas-driven mechanism 1, a material metering mechanism 2, a mixing mechanism 5, an extrusion pelletizing device 6, and a drying mechanism 8. The gas-driven mechanism 1 is connected to both the material metering mechanism 2 and the mixing mechanism 5, providing gas to both mechanisms to drive the material movement. The material metering mechanism 2 includes multiple storage devices 3 and multiple weighing devices 4. Each storage device 3 is connected to the gas-driven mechanism 1, and the storage devices 3 and weighing devices 4 are correspondingly connected. The weighing devices 4 are connected to the mixing mechanism 5. The gas-driven mechanism 1 uses gas to transport the individual materials from the corresponding storage devices 3 to the corresponding weighing devices 4. The weighing devices 4 weigh the corresponding individual materials according to a preset ratio and then convey each individual material to the mixing mechanism 5. The mixing mechanism 5 is connected to the extrusion pelletizing device 6 and uses gas to mix the individual materials to form an initial propellant, then conveys the initial propellant to the extrusion pelletizing device 6. The extrusion pelletizing device 6 is connected to the drying mechanism 8. The extrusion pelletizing device 6 extrudes the initial ignition transfer charge according to the preset size to form the ignition transfer charge of the target size, and then conveys the ignition transfer charge of the target size to the drying mechanism 8. The drying mechanism 8 is used to dry the ignition transfer charge of the target size to form the target ignition transfer charge.

[0064] Specifically, in this embodiment, the gas-driven mechanism 1 includes multiple sets of air pump filter assemblies, which can be divided into two parts. One part is connected to the material metering mechanism 2, and the other part is connected to the mixing mechanism 5 to provide gas to the material metering mechanism 2 and the mixing mechanism 5, thereby using the gas to drive the material movement. Each set of air pump filter assemblies includes a filter device 11, a drive air pump 12, a first delivery pipeline 13, and a second delivery pipeline 14. Specifically, the filter device 11 is connected to the drive air pump 12 through the first delivery pipeline 13. The filter device 11 is used to filter and purify the outside air and provide it to the drive air pump 12, so that the gas provided by the drive air pump 12 is in a clean state, thereby improving the purity of the propellant produced. The driving air pump 12 is connected to the storage device 3 and the mixing mechanism 5 through the second conveying pipeline 14. The driving air pump 12 can generate gas as a driving force to move the material in the storage device 3 and the mixed material in the mixing mechanism 5, so as to transport the individual materials to the corresponding weighing device 4 and mix the individual materials.

[0065] In one example, the inner walls of the first conveying pipe 13 and the second conveying pipe 14 are provided with a layer of bubble film. This bubble film can effectively prevent material from accumulating and sticking to the wall, as well as prevent mechanical or metal collisions or friction between the material and the metal pipe or mixer, thereby reducing safety risks in production and facilitating cleaning.

[0066] In this embodiment, the gas-driven mechanism 1 further includes a dust removal device 15, which is connected to the material metering mechanism 2 and is used to remove and filter the dust in the suction chamber where the material metering mechanism 2 is located.

[0067] The material metering mechanism 2 includes multiple storage devices 3 and multiple weighing devices 4. Each storage device 3 is connected to the gas-driven mechanism 1. The storage devices 3 and weighing devices 4 are connected in a corresponding manner. In this embodiment, the storage devices 3 and weighing devices 4 are preferably connected in a one-to-one correspondence, so that each storage device 3 stores only one type of material (one component of the propellant), and each weighing device 4 weighs only one type of material. The weighing device 4 is connected to the mixing mechanism 5. The gas-driven mechanism 1 transports the single material from the corresponding storage device 3 to the corresponding weighing device 4 using gas driving force. The weighing device 4 weighs the corresponding single material according to a preset ratio and then conveys each single material to the mixing mechanism 5.

[0068] Furthermore, in this embodiment, the storage device 3 includes a storage tank 31, an inlet valve, a level sensor, and a discharge pipe. The storage tank 31 is used for storing materials. The inlet valve is located at the top of the storage tank 31 and connected to the second conveying pipe 14. The level sensor includes a sensing end and a display end; the sensing end is located inside the storage tank 31, and the display end is located outside the storage tank 31, used to display the position and height of a single material sensed by the sensing end within the storage tank 31. The discharge pipe is located at the bottom of the storage tank 31 and connected to the weighing device 4. In one example, the inner wall of the storage tank 31 and the inner wall of the discharge pipe are each provided with a layer of bubble film.

[0069] In this embodiment, the weighing device 4 includes a metering sensor, a proportioning adjustment valve, a material container 41, a release valve, and a fourth conveying pipeline 42. The proportioning adjustment valve is connected to the discharge pipeline and the material container 41, and releases each individual material from the discharge pipeline to the material container 41 according to a preset proportion. The inner wall of the material container 41 is lined with a bubble film. The metering sensor is located at the bottom of the material container 41 and is used to weigh and determine whether the metering of each individual material in the material container 41 matches the preset proportion, and opens the release valve when it matches. The release valve is located between the material container 41 and the fourth conveying pipeline 42, which connects the material container 41 and the mixing mechanism 5 to convey the weighed individual materials from the material container 41 to the mixing mechanism 5. In one example, the inner wall of the fourth conveying pipeline is lined with a bubble film.

[0070] In this embodiment, the material metering mechanism 2 further includes multiple suction heads 21 and multiple third conveying pipes 22. Each suction head 21 is connected to the storage device 3 through the third conveying pipe 22 to suck various raw materials into the corresponding storage device 3. In one example, the inner wall of the third conveying pipe is provided with a layer of bubble film.

[0071] In this embodiment, the mixing mechanism 5 includes a mixing valve port, a mixing pressurizing air pump 51, and a mixing chamber tank 52. Multiple fourth delivery pipelines 42 converge at one end of the mixing valve port, and the other end of the mixing valve port is connected to the mixing pressurizing air pump 51 and the mixing chamber tank 52. The mixing pressurizing air pump 51 delivers the mixture from the mixing valve port to the mixing chamber tank 52. Simultaneously, the mixing pressurizing air pump 51 is connected to a gas drive mechanism 1 to mix the mixture in the mixing chamber tank 52 using the generated gas.

[0072] In one example, the mixing mechanism 5 further includes a rotating chamber, a rotating shaft, and a drive motor. The rotating chamber is movably disposed within the mixing chamber tank 52, and the rotating shaft is connected to the rotating chamber and the drive motor, so that the drive motor drives the rotating shaft to rotate the rotating chamber. Mechanical rotation is used as an alternative to facilitate the mixing of various individual materials within the rotating chamber.

[0073] In this embodiment, the mixing of the propellant material employs automatic weighing and feeding. The material movement is driven by a cyclone (gas-driven force) formed by high-speed gas flow. This movement allows the materials to interweave, resulting in rapid and uniform mixing. Simultaneously, during material transport and mixing, the inner walls of both the pipelines and the mixing chamber 52 are covered with 1-2mm air bubbles. This prevents material from impacting the pipeline or mixing chamber walls, reducing safety risks during transport and mixing, and preventing material residue and accumulation in the transport pipelines.

[0074] The mixing mechanism 5 is connected to the extrusion pelletizing device 6, and is used to mix the individual materials by gas driving force to form the initial ignition charge, and to transport the initial ignition charge to the extrusion pelletizing device 6. The extrusion pelletizing device 6 extrudes the initial ignition charge according to a preset size to form the ignition charge of the target size.

[0075] Specifically, in this embodiment, the extrusion pelletizing device 6 includes: an extrusion mechanism 61, a conveyor belt 62, multiple sets of blowers 63, a cooling assembly 64, a cutting assembly 65, and a vibrating screen 66. The extrusion mechanism 61 is connected to the mixing mechanism 5 to extrude the initial ignition-promoting powder provided by the mixing mechanism 5. The multiple sets of blowers 63, the cooling assembly 64, and the cutting assembly 65 are sequentially arranged along the conveyor belt 62, and the extruded initial ignition-promoting powder is sequentially conveyed to the blowers 63, the cooling assembly 64, and the cutting assembly 65. The blowers 63 are used to dry the initial ignition-promoting powder, the cooling assembly 64 is used to cool the initial ignition-promoting powder, and the cutting assembly 65 is used to cut the initial ignition-promoting powder. The vibrating screen 66 has holes of varying sizes to screen the cut initial ignition-promoting powder according to a preset size.

[0076] Furthermore, in this embodiment, the extrusion mechanism 61 includes: a servo press 611, a drive shaft 612, a propellant piston 613, a receiving cavity 614, a vacuum suction port 615, and an extrusion die 616. The servo press 611 is disposed at the top of the receiving cavity 614. The propellant piston 613 is movably disposed within the receiving cavity 614, where the propellant is contained, and the propellant piston 613 can extrude the propellant. The drive shaft 612 is connected to the propellant piston 613 and the servo press 611, driving the propellant piston 613 to reciprocate under the drive of the servo press 611. The extrusion die 616 is disposed at the end of the receiving cavity 614. The vacuum suction port 615 is disposed on the wall of the receiving cavity 614 and is positioned close to the wall. The vacuum suction port 615 can evacuate the receiving cavity 614.

[0077] The specific operation is as follows: The mixed initial ignition charge (dry state) is transferred to the extrusion mechanism 61, and a measured amount of deionized water is added for kneading, forming a dough-like consistency. The extrusion mechanism 61 has both heating and cooling functions, ensuring the kneading temperature to improve the plasticity of the ignition charge dough while preventing excessive temperature during kneading, which could lead to safety risks. The kneaded initial ignition charge (dough) is manually added to the accommodating cavity 614 of the extrusion mechanism 61. The pressing piston 613 moves downward, and the accommodating cavity 614 is simultaneously evacuated to remove air between or within the initial ignition charge (dough), preventing excess air from affecting the stability and continuity of the extrusion. After evacuation, the pressing piston 613 moves downward at a set speed to ensure a stable extrusion speed. After extrusion, the pressing piston 613 moves upward, and the remaining agent in the accommodating cavity 614 is manually removed (reworked kneading can be reused for extrusion). At the same time, new initial ignition charge (dough) is added, and the extrusion process is repeated. The cavity 614 has both heating and cooling functions in its wall. This is to ensure the plasticity of the agent during extrusion while also preventing the temperature from getting too high during the extrusion process, which could lead to safety risks.

[0078] In one example, the extrusion die 616 of the propellant is an annular discharge port formed by multiple small holes, which is threaded onto the receiving cavity 614. The diameter of the small holes is determined according to the outer diameter of the propellant, thus forming a propellant strip. The number of small holes should be as large as possible without the propellant strips touching or overlapping on the conveyor belt 62, ensuring both extrusion continuity and maximizing production capacity. The extruded propellant strips are arranged side by side on the conveyor belt 62, and the running speed of the conveyor belt 62 is basically the same as the speed of the extruded propellant, ensuring that the propellant strips remain straight during the transfer process. The blower 63 on the conveyor belt 62 cools the propellant strips, removing moisture from the surface of the propellant strips to achieve a surface-dry state. The propellant strips are conveyed to the cutting assembly 65 for automatic cutting into pellets, which then automatically enter a vibrating screen to screen out long pellets and fine powder, while the intermediate particles are automatically collected. After being sieved, the ignition particles (i.e., the target size ignition powder) are then divided into trays and sent to the drying room to dry most of the moisture.

[0079] In this embodiment, a mixing mechanism 7 is also included, which is disposed between the extrusion pelletizing device 6 and the drying device 8. The mixing mechanism 7 is used to mix the propellant of the target size to ensure the consistency of the batch. In one example, the mixing mechanism 7 includes a V-type mixer.

[0080] After mixing, the target-sized propellant is divided into trays and placed into the drying mechanism 8. The drying mechanism 8 includes a water bath drying oven, which dries the target-sized propellant. During drying, the temperature and time of the water bath drying oven are strictly controlled to ensure that the moisture content of the target-sized propellant is less than 0.1%.

[0081] The dried target-size ignition transfer powder is called the target ignition transfer powder. It is then placed in a plastic bag and vacuum-sealed, ensuring the seal is airtight to prevent moisture absorption during long-term storage. After passing inspection, the sealed target ignition transfer powder can be stored in the warehouse for later use.

[0082] This application provides a propellant preparation system, including: a gas-driven mechanism 1, a material metering mechanism 2, a mixing mechanism 5, an extrusion pelletizing device 6, and a drying mechanism 8. The gas-driven mechanism 1 is connected to both the material metering mechanism 2 and the mixing mechanism 5, providing gas to both mechanisms to drive the material movement. The material metering mechanism 2 includes multiple storage devices 3 and multiple weighing devices 4. Each storage device 3 is connected to the gas-driven mechanism 1, and the storage devices 3 and weighing devices 4 are correspondingly connected. The weighing devices 4 are connected to the mixing mechanism 5. The gas-driven mechanism 1 uses gas to transport individual materials from the corresponding storage devices 3 to the corresponding weighing devices 4. The weighing devices 4 weigh the corresponding individual materials according to a preset ratio and then convey each individual material to the mixing mechanism 5. The mixing mechanism 5 is connected to the extrusion pelletizing device 6 and uses gas to mix the individual materials to form an initial propellant, then conveys the initial propellant to the extrusion pelletizing device 6. The extrusion pelletizing device 6 is connected to the drying mechanism 8. The extrusion pelletizing device 6 extrudes the initial ignition transfer charge according to the preset size to form the ignition transfer charge of the target size, and then conveys the ignition transfer charge of the target size to the drying mechanism 8. The drying mechanism 8 is used to dry the ignition transfer charge of the target size to form the target ignition transfer charge.

[0083] This application's ignition propellant preparation system can be understood as solving the safety and production capacity issues in ignition propellant production. Within the same building area, it can expand production capacity several times or even ten times, while simultaneously increasing product yield and quality. Automatic weighing and mixing not only allows for traceability of the actual feeding of each material and batch, but also reduces labor costs and operational errors caused by human intervention, as well as occupational disease prevention and workshop environmental pollution. The gas-driven material movement not only achieves mixing efficiency several times higher than mechanical mixing, but also results in more uniform mixing. The semi-dry mixing process, compared to dry mixing, not only reduces safety risks but also allows for mixing more batches of products at once, balancing product quality and increasing production capacity. The use of a water bath forced-air drying oven avoids accidental combustion of materials due to excessively high temperatures, ensuring production safety while improving drying efficiency and increasing the quantity dried at one time.

[0084] Second Embodiment

[0085] This application provides a method for preparing a ignition source, applied to the ignition source preparation system described above. For example... Figure 5 As shown, Figure 5 This is a flowchart of a method for preparing a propellant according to the second embodiment of this application.

[0086] In this embodiment, a method for preparing a ignition propellant includes the following steps, specifically:

[0087] Step 501: The material is conveyed to the material metering mechanism by the gas driving force generated by the gas driving mechanism.

[0088] Step 502: The material metering mechanism weighs the corresponding single material according to the preset ratio, and the single material is transported to the mixing mechanism and mixed under the drive of the gas driving force to form the initial ignition charge.

[0089] Step 503: The initial propellant is fed to an extrusion pelletizing device to extrude the initial propellant according to a preset size to form a propellant of target size, and the propellant of target size is fed to a mixing mechanism.

[0090] Step 504: The target-sized propellant is mixed and transported to the drying mechanism through the mixing mechanism.

[0091] Step 505: The target-sized ignition propellant is dried by the drying mechanism to form the target ignition propellant.

[0092] This application provides a method for preparing ignition propellants, which can solve the safety and production capacity problems in ignition propellant production. Within the same building area, production capacity can be increased several times or even ten times. Simultaneously, with the increase in production capacity, product yield and quality rate can be improved. Automatic weighing and mixing not only allows for traceability of the actual feeding of each material and each batch, but also reduces labor costs and operational errors caused by manual labor, as well as occupational disease prevention and workshop environmental pollution. The gas-driven force that moves the materials not only increases mixing efficiency several times over mechanical mixing, but also results in more uniform mixing. The semi-dry mixing process, compared to dry mixing, not only reduces safety risks but also allows for mixing more batches of products at once, balancing product quality and increasing production capacity. Using a water bath forced-air drying oven avoids accidental combustion of materials due to excessive temperature, ensuring production safety while improving drying efficiency and increasing the quantity dried at one time.

[0093] It should be noted that although several structures, components, or units for implementing the relevant functions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the specific embodiments of this application, the features and functions of two or more structures, components, or units described above can be embodied in one structure, component, or unit. Conversely, the features and functions of one structure, component, or unit described above can be further divided and embodied by multiple components, structures, or units.

[0094] Furthermore, although the various components of the components or apparatus in this application and the mounting arrangements between them are described in a specific order in the accompanying drawings, this does not require or imply that the components or apparatus must be designed according to that specific component or mounting arrangement, or that all the components shown must be included to achieve the desired result. Additional or alternative components may be omitted, multiple components may be combined into one component to achieve the corresponding function, and / or a component may be decomposed into multiple components to achieve the corresponding function, etc.

[0095] Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of this application. Therefore, the scope of protection of this application should be determined by the scope defined in the claims of this application.

Claims

1. A system for producing a transfer charge, characterized by The application relates to a gas-driven material quantitative mixing device for preparing a target size transfer fire agent, which comprises a gas driving mechanism, a material quantitative mechanism, a mixing mechanism, an extruding and pelletizing device and a drying mechanism. The gas driving mechanism is connected with the material quantitative mechanism and the mixing mechanism respectively, and is used for providing gas to the material quantitative mechanism and the mixing mechanism respectively, so as to use the gas as a gas driving force for driving the material to move. The material quantitative mechanism comprises a plurality of material storage devices and a plurality of weighing devices, each of the material storage devices is connected with the gas driving mechanism, the material storage devices and the weighing devices are connected correspondingly, and the weighing devices are connected with the mixing mechanism; the gas driving mechanism transports single material corresponding to the material storage devices to the corresponding weighing devices through the gas driving force, the weighing devices measure the corresponding single material according to a preset proportion, and each single material is transported to the mixing mechanism. The mixing mechanism is connected with the extruding and pelletizing device, and is used for mixing each single material to form an initial transfer fire agent through the gas driving force, and then the initial transfer fire agent is transported to the extruding and pelletizing device. The extruding and pelletizing device is connected with the drying mechanism, and is used for extruding the initial transfer fire agent according to a preset size to form a target size transfer fire agent, and then the target size transfer fire agent is transported to the drying mechanism. The drying mechanism is used for drying the target size transfer fire agent to form a target transfer fire agent. The gas driving mechanism comprises a plurality of gas pump filtering assemblies, each of the gas pump filtering assemblies comprises a filtering device, a driving gas pump, a first conveying pipeline and a second conveying pipeline.

2. The transfer charge preparation system of claim 1, wherein The filtering device is connected with the driving gas pump through the first conveying pipeline, and is used for filtering and purifying external air and providing the driving gas pump with the air. The driving gas pump is connected with the material storage devices and the mixing mechanism through the second conveying pipeline, and can generate gas as a gas driving force for driving the material in the material storage devices and the mixed material in the mixing mechanism to move, so as to transport the single material to the corresponding weighing device and mix each single material. The material quantitative mechanism further comprises a plurality of material suction heads and a plurality of third conveying pipelines, each of the material suction heads is connected with the material storage devices through the third conveying pipelines, so as to suck various raw materials to the corresponding material storage devices.

3. The transfer charge preparation system of claim 1, wherein The material storage device comprises a material storage tank, a feeding valve, a material level sensor and a discharging pipeline.

4. The transfer charge preparation system of claim 1, wherein The material storage tank is used for storing materials. The feeding valve is arranged at the top of the material storage tank and is connected with the second conveying pipeline. The material level sensor comprises a sensing end and a display end, the sensing end is arranged in the interior of the material storage tank, and the display end is arranged in the exterior of the material storage tank and is used for displaying the position height of the single material sensed by the sensing end in the material storage tank. The discharging pipeline is arranged at the bottom of the material storage tank and is connected with the weighing device. The weighing device comprises a metering sensor, a proportion adjustment valve, a material placing box, a releasing valve and a fourth conveying pipeline.

5. The transfer charge preparation system of claim 4, wherein ​ The proportioning adjusting valve is connected between the discharging pipeline and the material placing box, and releases each single material in the discharging pipeline to the material placing box according to the preset proportioning; The metering sensor is arranged at the bottom of the material placing box, and is used for weighing and determining whether the metering of the single material in the material placing box is adapted to the preset proportioning, and opening the release valve when the metering is adapted; The release valve is arranged between the material placing box and the fourth conveying pipeline; The fourth conveying pipeline is connected between the material placing box and the medicine mixing mechanism.

6. The transfer charge preparation system of claim 5, wherein The medicine mixing mechanism comprises a mixing valve port, a mixing pressurized air pump and a mixing cavity tank. A plurality of fourth conveying pipelines converge at one end of the mixing valve port, and the other end of the mixing valve port is connected to the mixing pressurized air pump and the mixing cavity tank, so that the mixed material of the mixing valve port is conveyed to the mixing cavity tank by the mixing pressurized air pump, and the mixing pressurized air pump is connected to the gas driving mechanism to mix the mixed material of the mixing cavity tank by the generated gas.

7. The transfer charge preparation system of claim 1, wherein The extrusion and granulation device comprises an extrusion mechanism, a conveying belt, a plurality of air blowers, a cooling assembly, a cutting assembly and a vibrating screen. The extrusion mechanism is connected to the medicine mixing mechanism to extrude the initial priming powder provided by the medicine mixing mechanism. A plurality of air blowers, a cooling assembly and a cutting assembly are arranged along the conveying belt in sequence, and the extruded initial priming powder is conveyed to the air blowers, the cooling assembly and the cutting assembly in sequence; the air blowers are used to dry the initial priming powder, the cooling assembly is used to cool the initial priming powder, and the cutting assembly is used to cut the initial priming powder. The vibrating screen is provided with holes of different sizes to screen the cut initial priming powder according to the preset size.

8. The transfer charge preparation system of claim 7, wherein The extrusion mechanism comprises a servo press, a driving shaft, a medicine pressing piston, a containing cavity, a vacuum suction port and an extrusion die head. The servo press is arranged at the top of the containing cavity. The medicine pressing piston is movably arranged in the containing cavity, and the priming powder is contained in the containing cavity. The driving shaft is connected to the medicine pressing piston and the servo press. The extrusion die head is arranged at the end of the containing cavity. The vacuum suction port is arranged on the wall of the containing cavity.

9. The transfer charge preparation system of claim 1, wherein, The mixing mechanism is arranged between the extrusion and granulation device and the drying mechanism, and is used to mix the target size priming powder.

10. A method for preparing a transfer charge, applied to the system for preparing a transfer charge according to any one of claims 1 to 9, characterized in that, The gas driving force formed by the gas driving mechanism is used to convey the material to the material metering mechanism; The material metering mechanism is used to weigh and determine the corresponding single material according to the preset proportioning, and convey each single material to the medicine mixing mechanism to be mixed under the driving of the gas driving force to form the initial priming powder; The initial priming powder is conveyed to the extrusion and granulation device to be extruded according to the preset size to form the target size priming powder, and the target size priming powder is conveyed to the mixing mechanism. ​ The target size priming mixture is mixed and delivered to the drying mechanism through the mixing mechanism; The target size priming mixture is dried to form the target priming through the drying mechanism.

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