Device and method for preparing grain comprising medicinal cover

Abstract

The invention relates to the field of grain manufacturing, in particular to matching optimization design of a medicinal cover in the grain manufacturing process. The invention aims to provide the manufacturing device and method for manufacturing the grain containing the medicinal cover, an integrated synchronous compression molding method is adopted, interface gaps inevitably generated by traditional step-by-step manufacturing are thoroughly eliminated from the root of process, efficient and symmetrical transmission of detonation waves is achieved, and the quality of the grain containing the medicinal cover is improved. And the energy utilization rate of shaped charge, the stability of penetration power and the striking precision are obviously improved. According to the technical scheme, the device for preparing the grain containing the medicinal cover comprises a main die and a stamping body, the main die comprises an outer die sleeve and an inner die cavity located in the outer die sleeve, the device further comprises a bottom die, the bottom die comprises a bottom table and a cover abutting body, the cover abutting body is configured to be used for containing the medicinal cover, and the stamping body is used for stamping the medicinal cover. And the outer convex part is arranged on the bottom table and extends into the inner die cavity.

Description

Technical Field

[0001] This invention relates to the field of medicine column manufacturing, and more specifically to the optimized design of the medicine property cover in the medicine column manufacturing process. Background Technology

[0002] The pressing stage in explosives manufacturing refers to the process of compressing loose explosive powder into a charged pellet with a specific geometric shape under high pressure. Its core function is to release a large amount of energy in a very short time through a detonation reaction upon detonation, serving as a power source for other devices. A shaped charge liner is typically installed on one side of the explosive charge liner. The shaped charge liner is a cone-shaped, hemispherical, or other specially shaped liner made of a metal with good ductility and high density, such as copper or tantalum.

[0003] The combination of a propellant charge and a shaped charge liner is often referred to as a shaped charge, and it has a wide range of applications, including military and civilian fields. Examples include oil well perforation projectiles, mine blasting, rock breaking in specific situations, and pyrotechnic devices on spacecraft.

[0004] In existing technologies, the combination of explosive charges and shaped charge liner is usually achieved through a step-by-step processing and assembly process. This involves separately pressing loose explosive charges into predetermined sizes using a specialized mold. Simultaneously, a shaped charge liner is manufactured separately using machining methods such as turning or spinning. Finally, the pressed explosive charges are assembled together with the machined shaped charge liner.

[0005] However, shaped charge warheads manufactured using this process often exhibit shortcomings in both explosive power and accuracy during practical use. Specifically, on the one hand, the explosive jet may break into several segments or diverge, failing to converge into a concentrated, continuous, and sharp jet. This suboptimal jet significantly reduces the penetration depth to the target, and may even result in ineffective penetration. On the other hand, the explosive jet deviates from the theoretical axis, producing a random pitch or yaw angle. This jet deviation itself can also lead to failure to hit the intended target. Even within the same batch of products, performance varies greatly, and directional reliability cannot be guaranteed. Summary of the Invention

[0006] The purpose of this invention is to provide an apparatus and method for preparing a propellant charge containing a shaped charge. By adopting an integrated synchronous pressing molding method, the interface gaps that are inevitably produced by traditional step-by-step manufacturing are completely eliminated from the source of the process, so as to achieve efficient and symmetrical transmission of detonation waves and significantly improve the energy utilization rate, penetration power stability and strike accuracy of shaped charge.

[0007] The present invention is achieved through the following technical solution: an apparatus for preparing a drug column containing a drug veneer, comprising a main mold and a stamping body, the main mold comprising an outer mold sleeve and an inner mold cavity located inside the outer mold sleeve, and a bottom mold comprising a base platform and a shield body, the shield body being configured to place the drug veneer, and protruding outward from the base platform and extending into the inner mold cavity, the stamping body being configured to stamp the drug placed in the inner mold cavity, so that the drug column and the drug veneer are fitted together.

[0008] As a preferred embodiment of the present invention, the stamping body includes a limiting plate and a stamping column located below the limiting plate, the stamping column being used to extend into the inner mold cavity.

[0009] As a preferred embodiment of the invention, it further includes a limiting platform located above the main mold, the limiting platform including a guide channel through which the stamping column passes, the guide channel being configured in size and position to correspond to the inner mold cavity and to guide the movement of the stamping column.

[0010] As a preferred embodiment of the present invention, the upper surface of the limiting platform is a flat contact surface, which is used to abut against the limiting plate, thereby limiting the maximum movement distance of the stamping body.

[0011] As a preferred embodiment of the present invention, the thickness of the limiting stage is configured to the rated stamping stroke of the stamping column.

[0012] As a preferred embodiment of the invention, it further includes a discharge seat for providing discharge space for the stamped propellant column and propellant cover.

[0013] As a preferred embodiment of the present invention, the ejector seat includes an ejector sleeve and an ejector cavity located in the ejector sleeve. The ejector seat is located below the main mold. The ejector seat is configured such that, under the downward pressing action of the stamping body, the drug cartridge and the drug hood fall into the ejector seat.

[0014] As a preferred embodiment of the present invention, the diameter of the dispensing cavity is larger than the diameter of the inner mold cavity.

[0015] A method for preparing a propellant column comprising a pharmacological shroud, the apparatus for preparing a propellant column comprising a pharmacological shroud described above, the method comprising:

[0016] Place the powdered medicine into the inner mold cavity;

[0017] Place the medicated shield on the shield body;

[0018] The stamping body completes the powder pressing action, so that the medicine column and the medicine cover are in contact;

[0019] Remove the drug cartridge and the drug-containing cover from the inner mold cavity.

[0020] As a preferred embodiment of the present invention, after the powder pressing action is completed, the bottom mold is removed and replaced with a drug ejector seat, and the pressing body is used to continue pressing down, so that the drug column and the drug cover are pressed into the drug ejector seat.

[0021] In summary, the present invention has the following beneficial effects:

[0022] 1. By setting up a bottom mold specifically for placing the propellant liner and extending into the mold cavity, integrated synchronous pressing of the propellant and the propellant liner is achieved within a sealed mold cavity. This fundamentally eliminates interface gaps caused by step-by-step processing, ensuring a perfect fit between the propellant charge and the propellant liner. This lays the structural foundation for the efficient and symmetrical transmission of the detonation wave, significantly improving the energy utilization rate and operational reliability of the final product.

[0023] 2. The stamping body adopts a structure of a limiting plate and a stamping column. The limiting plate ensures the stability of the stamping machine during pressurization and prevents eccentric loading. The stamping column accurately transmits the pressure to the powder, ensuring the uniformity of axial pressure during the formation of the powder, which is conducive to obtaining high-quality powder with consistent density and uniform structure.

[0024] 3. The limiting stage and its guide rails provide precise vertical guidance and positioning for the movement of the stamping column. This effectively prevents problems such as uneven propellant density, local stress concentration, or asymmetrical pressure on the propellant liner caused by punch offset during the stamping process, ensuring the repeatability of forming quality.

[0025] 4. By engaging with the upper surface of the limiting plate, a hard limit is achieved on the stamping stroke. This structure is simple and reliable, and can precisely control the final pressing pressure and propellant density, avoiding product performance fluctuations caused by over- or under-pressure, and ensuring the stability of the production process and the consistency of product batches.

[0026] 5. The thickness of the limiting stage is configured to match the rated stamping stroke, directly linking stroke control to key structural parameters. This design simplifies equipment debugging and calibration, and allows for the adaptation to different propellant column pressing requirements by replacing limiting stages of varying thicknesses, thus enhancing the process flexibility of the device.

[0027] 6. A dedicated ejection seat is provided, offering a controlled ejection space for the demolding process. This design modularizes the demolding function, separating the pressing station from the demolding station, avoiding complex ejection operations within the mold cavity, simplifying the process flow, and reducing the potential risk of damage to the molded propellant cartridges.

[0028] 7. By using a stamping process to continue pressing down to eject the propellant, the propellant cartridge and propellant liner assembly are smoothly lowered into the ejection cavity. This ensures that the propellant cartridge remains under pressure throughout the demolding process, effectively preventing shear stress on the fragile cartridge, especially at the interface, when ejected from the bottom, thus protecting the structural integrity of the molded product.

[0029] 8. The diameter of the ejection chamber is set to be larger than that of the mold cavity, creating ejection guide and clearance space. This structure ensures that the propellant assembly can smoothly and unobstructedly detach from the mold cavity, preventing scratches or edge chipping of the propellant surface caused by friction or jamming, and ensuring the integrity of the product's appearance and dimensions. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of Example 1, showing the initial state;

[0031] Figure 2 This is a schematic diagram of Example 1 after the powder has been pressed down;

[0032] Figure 3 This is a schematic diagram of Example 1 during the drug withdrawal stage;

[0033] Figure 4 This is a three-dimensional schematic diagram of the main mold and the bottom mold.

[0034] In the diagram: 1. Main mold, 11. Outer mold sleeve, 12. Inner mold cavity, 2. Bottom mold, 21. Bottom platform, 22. Abutment body, 3. Stamping body, 31. Limiting plate, 32. Stamping column, 4. Limiting platform, 41. Contact surface, 42. Guide channel, 5. Drug ejection seat, 51. Drug ejection sleeve, 52. Drug ejection cavity, a. Drug column, b. Drug cover. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings.

[0036] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0037] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made to the function and arrangement of the described elements without departing from the scope of this specification. Various processes or components may be appropriately omitted, substituted, or added to the examples. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with respect to some examples may be combined into other examples.

[0038] Example 1, a method for preparing a drug column containing a drug-containing shroud, which relies on hardware such as Figure 1 The apparatus shown is for preparing a column containing a medicament.

[0039] As described in the background section above, in existing technologies, the combination of explosive charges and shaped charge liner typically employs a step-by-step processing and assembly process. First, loose explosives are individually pressed into explosive charges of a predetermined size using a specialized mold. Simultaneously, a shaped charge liner is manufactured separately through machining. The pressed explosive charges and the machined shaped charge liner are then assembled together using adhesives, mechanical snap-fits, or other methods.

[0040] However, after being compressed under high pressure, the explosive particles inside the explosive charge are in a state of extremely high stress. For a period after compression, although the external pressure has been released, a physical process of stress relaxation and microstructural adjustment occurs within the material, macroscopically manifested as a slight increase in the size of the explosive charge. In a step-by-step manufacturing process, the explosive charge undergoes multiple stages after compression, including storage, handling, and testing, during which time its expansion process already occurs. When it is assembled with a pre-processed, dimensionally stable shaped charge liner, a tiny annular gap forms at the interface between the two.

[0041] Although this gap is imperceptible to the naked eye, it is enormous on a detonation physics scale. In shaped charge technology, even a micrometer-sized gap can cause serious damage to the performance of the weapon system through a series of chain reactions.

[0042] When a gap exists, the detonation wave must first propagate through a low-resistivity air medium. This process causes the wavefront shape of the detonation wave to change from an ideal plane or conical wave to an irregular shape as it propagates through the gap air. The shock wave pressure attenuates sharply as it propagates from a high-density medium to a low-density medium. When the attenuated shock wave then propagates back into the high-density medium, i.e., the shaped charge liner, its pressure amplitude is much lower than that at direct contact.

[0043] Based on the aforementioned physical mechanisms, shaped charge products with interface gaps will exhibit performance degradation, such as a significant decrease in penetration capability and poor strike accuracy and stability.

[0044] In this embodiment, the core value lies in eliminating this gap at the source through an integrated molding process, thereby ensuring that the shaped charge can achieve its theoretical maximum performance.

[0045] Figure 1 This diagram shows the fabrication apparatus in its initial state. The bottom mold 2 is smoothly fixed onto the press worktable, ensuring it is level. The bottom mold 2 includes a base 21 and a shield 22, the latter being a precisely machined protruding structure. The top shape of the shield 22 is adapted to the inner surface contour of the drug-eluting shield b; for example, if the drug-eluting shield b is conical, then the top of the shield 22 is also conical. This step is fundamental for subsequent precise positioning. Figure 4 As shown, the medicated shield b is placed on the shield body 22.

[0046] The main mold 1 consists of an outer mold sleeve 11 and an inner mold cavity 12. The dimensions of the inner mold cavity 12 are matched to the target diameter and height of the drug column a to be pressed. The main mold 1 is placed on the bottom mold 2, and the drug liner b and the shield 22 extend into the space of the inner mold cavity 12. The base 21 of the bottom mold 2 is completely fitted with the bottom surface of the main mold 1. The powdered drug is placed in the inner mold cavity 12, above the drug liner b.

[0047] The modular cooperation between the bottom mold 2 and the main mold 1 enables rapid and precise mold assembly. The design of the shield 22 extending into the inner mold cavity 12 provides a stable and unique placement position for the drug shield b, ensuring the concentricity of the drug shield b and the inner mold cavity 12 from the source. This lays the foundation for the uniform pressing of the drug column a and the drug shield b in the future, and avoids interface gaps caused by misalignment.

[0048] Place the limiting table 4 on the upper surface of the main mold 1, and align the size and position of the guide channel 42 on it with the inner mold cavity 12.

[0049] Subsequently, the core pressing and forming operation is performed. The stamping column 32 of the stamped body 3 is passed through the guide channel 42 of the limiting platform 4, and its lower end gently contacts the surface of the loose explosive powder inside the inner mold cavity 12. Figure 2 As shown, the press is started, driving the stamping body 3 to press down at a constant speed. Under the precise constraint of the guide rail 42, the stamping column 32 moves vertically downward, applying pressure to the loose explosive. When the limiting plate 31 of the stamping body 3 is in complete contact with the flat contact surface 41 on the limiting platform 4, the pressing action stops, at which point the stamping column 32 has reached its rated stamping stroke. Under this pressure, the loose explosive is compacted into a dense explosive column a, and under sufficient pressure, it achieves a tight fit with the explosive liner b below.

[0050] The design of the limiting stage 4 and guide rail 42 provides crucial verticality assurance for the stamping process, effectively preventing uneven propellant density or excessive pressure on one side of the propellant shroud caused by punch misalignment. The hard contact limiting plate 31 and the contact surface 41 ensure constant stroke and final pressure for each press, guaranteeing high consistency between product batches and fundamentally improving the stability of the shaped charge's power and precision. Furthermore, when different product specifications and pressing formations are required, only the limiting stage 4 of different thicknesses needs to be adjusted, making the process convenient and quick.

[0051] After compression molding, the assembly of the drug column a and the drug-containing shield b must be safely removed. For example... Figure 3As shown, remove the limiting stage 4. Then, move the bottom mold 2 horizontally out from under the main mold 1. At this time, the combination of the drug cartridge a and the drug cover b is temporarily left in the inner mold cavity 12. Move the ejector seat 5 directly under the main mold 1 and fix it in position. The ejector cavity 52 of the ejector seat 5 has a diameter slightly larger than the diameter of the inner mold cavity 12. Start the press again and perform a small downward pressing action. The stamping body 3 moves down again, and the combination of the drug cartridge a and the drug cover b is smoothly and completely pushed into the ejector cavity 52 of the ejector seat 5. Finally, the final product is taken out from the ejector cavity 52.

[0052] The demolding process employs an independent ejector seat 5 and a pressing action using a stamping body, resulting in a smooth, pushing motion rather than a rigid ejection. This design ensures that the propellant grain a consistently bears axial pressure during demolding, effectively preventing shear stress at the interface between the propellant grain a and the propellant cap b that might occur when ejecting from the bottom, thus protecting the structural integrity of the molded body. The enlarged diameter of the ejector cavity 52 creates a natural clearance space, ensuring a smooth and unobstructed demolding process and preventing scratches or edge chipping of the propellant grain.

[0053] Furthermore, no additional powder removal equipment is needed during this process; the original stamping body 3 can still be used to remove the powder. On the other hand, the powder removal is from top to bottom, not bottom to top. This is because the propellant column a is made of powder, and although its internal structure is fixed after pressing, its mechanical strength is still lower than that of the metal propellant cover b, especially the interface area where the two are joined. If it is ejected upwards from the bottom mold 2, the force of the ejector rod will be directly applied to the propellant cover b. The propellant cover b is pushed upwards, while there is static friction between the propellant column a and the wall of the inner mold cavity 12, causing its movement to lag. This push and resistance will generate a huge shear stress (a force that causes the two parts of an object to tend to move relative to each other) at the interface between the propellant column a and the propellant cover b. This shear force can easily cause micro-cracks, peeling, or even the bottom of the propellant column a to break off, resulting in irreversible damage, at the not-yet-fully-cured pressed interface.

[0054] As described above, in this embodiment, pressure is applied downwards from above using the stamping body 3, with the force applied to the top of the propellant column a. The propellant column a, as a whole, evenly transmits the pressure to the propellant cover b, propelling it downwards together. During this process, the propellant column a and the propellant cover b move synchronously, with no tendency for relative movement between them. Therefore, no shear stress is generated at the interface, perfectly protecting the pressing results and ensuring the integrity of the product structure.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. Furthermore, the terms "vertical," "horizontal," "front," and "rear," etc., mentioned in the embodiments of the present invention indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These are merely for the convenience of describing the present invention 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. Therefore, they should not be construed as limitations on the present invention. It should be further noted that, unless otherwise explicitly specified and limited, terms such as "install," "connect," "join," and "fix" in the description should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0056] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An apparatus for preparing a drug column containing a medicament, comprising a main mold (1) and a stamping body (3), said main mold (1) comprising an outer mold sleeve (11) and an inner mold cavity (12) located inside said outer mold sleeve (11), characterized in that: It also includes a bottom mold (2), which includes a base (21) and a shield (22). The shield (22) is configured to place a medicated shield (b) and protrudes outward from the base (21) and extends into the inner mold cavity (12). The stamping body (3) is configured to stamp the powder placed in the inner mold cavity (12) so that the medicated column (a) fits against the medicated shield (b).

2. The apparatus for preparing a drug column comprising a drug liner according to claim 1, characterized in that: The stamping body (3) includes a limiting plate (31) and a stamping column (32) located below the limiting plate (31), the stamping column (32) being used to extend into the inner mold cavity (12).

3. The apparatus for preparing a drug column comprising a drug liner according to claim 2, characterized in that: It also includes a limiting platform (4) located above the main mold (1), the limiting platform (4) including a guide channel (42) through which the stamping column (32) passes, the guide channel (42) being configured to be sized and positioned to correspond to the inner mold cavity (12) and to provide guidance for the movement of the stamping column (32).

4. The apparatus for preparing a drug column comprising a drug liner according to claim 3, characterized in that: The upper surface of the limiting platform (4) is a flat contact surface (41), which is used to contact the limiting plate (31) to limit the maximum movement distance of the stamping body (3).

5. The apparatus for preparing a drug column comprising a drug liner according to claim 4, characterized in that: The thickness of the limiting platform (4) is configured to be the rated stamping stroke of the stamping column (32).

6. The apparatus for preparing a drug column comprising a drug liner according to claim 1, characterized in that: It also includes a drug ejector seat (5) for providing a drug ejection space for the stamped drug column (a) and drug cover (b).

7. The apparatus for preparing a drug column comprising a drug liner according to claim 6, characterized in that: The ejector seat (5) includes an ejector sleeve (51) and an ejector cavity (52) located in the ejector sleeve (51). The ejector seat (5) is located below the main mold (1). The ejector seat (5) is configured such that, under the pressing action of the stamping body (3), the drug column (a) and the drug cover (b) fall into the ejector seat (5).

8. The apparatus for preparing a drug column comprising a drug liner according to claim 7, characterized in that: The diameter of the discharge cavity (52) is larger than the diameter of the inner mold cavity (12).

9. A method for preparing a pharmacopoeia comprising a pharmacopoeia, comprising the apparatus for preparing a pharmacopoeia comprising a pharmacopoeia as described in any one of claims 1-8, characterized in that: The method includes: The powder is placed into the inner mold cavity (12); Place the medicated shield (b) on the shield body (22); The stamping body (3) completes the powder pressing action, so that the medicine column (a) and the medicine cover (b) are in contact; Remove the drug column (a) and the drug cover (b) from the inner mold cavity (12).

10. The method for preparing a drug column comprising a drug liner according to claim 9, characterized in that: After the powder pressing action is completed, the bottom mold (2) is removed and replaced with the drug ejector seat (5). The stamping body (3) is used to press down, so that the drug column (a) and the drug cover (b) are pressed into the drug ejector seat (5).

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