A three-layer multi-guide-pillar frame-type drug compression mold

Abstract

This utility model provides a three-layer, multi-guide-pillar frame-type drug-pressing mold, including a lower mold, a middle mold, and an upper mold. The lower mold has a lower punch on its bottom surface and at least three guide pillars distributed in different positions along its edge. Each guide pillar has a limiting groove that engages with the middle and upper molds. The limiting grooves include a first and second upper limiting groove located at the top of the guide pillar, and a first and second middle limiting groove located at the bottom of the guide pillar. The middle mold has a mold sleeve, and the upper mold has an upper punch. The middle and upper molds are sequentially arranged on the guide pillars from bottom to top. This drug-pressing mold is designed with a three-layer, multi-guide-pillar structure. Through a stepped engagement structure with multiple limiting grooves and elastic locking points, it achieves precise positioning and coordinated displacement of the upper and middle molds on the guide pillars, completing the automated process of drug loading, pressing, and mold removal. Simultaneously, it ensures zero-damage separation of the drug column (pass rate ≥99%), guaranteeing product quality.

Description

Technical Field

[0001] This utility model belongs to the field of powder compression molding die technology, specifically relating to a three-layer multi-guide column frame compression die for ammunition powder compression molding, which is suitable for automated production lines. Background Technology

[0002] Ammunition (explosives) needs to be pressed into shape using molds before use. Existing pressing molds mainly consist of a concave mold and a convex mold. When unmolding, the concave mold needs to be rotated 180° to separate the propellant column. This type of mold and pressing method has two major defects: (1) High propellant column breakage rate: The inversion separation causes damage to the propellant column structure, and the industry average pass rate is only 85%-90%; (2) It is difficult to automate: Manual unmolding takes ≥3 minutes per piece, which is inefficient and poses a great safety hazard, resulting in high production costs.

[0003] Chinese patent CN 216096391 U proposes a powder metallurgy molding die, including a fixed mold base and a moving mold base. The fixed mold base is inlaid with guide pillars, and the moving mold base is inlaid with guide sleeves. The mold is closed with the fixed mold base through the guide sleeves and guide pillars. It adopts a split design. After the raw material is formed in the molding module, the external force pushes the ejector block to drive the molding module to rise and move out of the cavity. At this time, the excitation coil on the left half of the molding module is energized to generate a magnetic repulsive force, thereby separating the right half of the cavity to a certain distance, so that demolding can be performed. However, this method has two major drawbacks: (1) The overall structure is complex and it needs to be energized during use, which is not suitable for explosives and poses a safety hazard; (2) After demolding, the product is located between the left half of the cavity and the right half of the cavity, which is difficult to remove and still requires manual intervention, thus failing to solve the problem of automated demolding. Summary of the Invention

[0004] In view of the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a three-layer multi-column frame-type drug pressing mold to achieve: (1) zero-damage separation of drug columns (pass rate ≥ 99%); (2) full-process automation (single piece time ≤ 30 seconds); (3) multi-specification compatibility (adapted to 5 types of drug column shapes / sizes).

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A three-layer, multi-guide-pillar frame-type compression mold includes a lower mold, a middle mold, and an upper mold. The lower mold has a lower punch on its bottom surface and at least three guide pillars distributed in different directions near its outer edge. Each guide pillar has a limiting groove that engages with the middle and upper molds. The limiting groove includes a first and second upper limiting groove located on the upper part of the guide pillar, and a first and second middle limiting groove located on the lower part of the guide pillar. The middle mold has at least one mold sleeve, and the upper mold has an upper punch matching the number of mold sleeves. The middle and upper molds are sequentially arranged on the guide pillars from bottom to top, and each mold has elastic locking points that engage with the limiting grooves of the guide pillars.

[0007] As a preferred embodiment of the utility model, the bottom surface of the lower die can be detachably installed with a lower punch, the number of lower punches matches the number of die sleeves, the lower punches extend into the die sleeves and combine with the die sleeves to form a drug loading cavity with a lower end sealed, and the shapes of the lower punches and upper punches are adapted to the shape of the drug column.

[0008] As a preferred embodiment of this utility model, the first upper limit groove is used to fix the upper mold in the initial state; the second upper limit groove is used to fix the upper mold in the molding state; the first middle limit groove is used to fix the middle mold in the demolding state; and the second middle limit groove is used to fix the middle mold in both the initial state and the molding state.

[0009] As a preferred embodiment of this utility model, the elastic locking point is a spring steel ball structure, which is engaged in the limiting groove to achieve positioning.

[0010] As a preferred embodiment of this utility model, the first upper limit groove and the second upper limit groove are disposed on the same guide post or on different guide posts, and the first middle limit groove and the second middle limit groove are disposed on the same guide post or on different guide posts. Limit grooves with the same function are distributed at least at the same height position of the three guide posts, that is, limit grooves with the same function are disposed at the same height position of the guide posts at least three different orientations.

[0011] As a preferred embodiment of the utility model, there are four guide pillars distributed at the four corners of the lower mold, and each guide pillar is provided with a first upper limit groove, a second upper limit groove, a first middle limit groove, and a second middle limit groove.

[0012] Advantages and beneficial effects of this utility model:

[0013] (1) The pressing mold provided by this utility model is designed as a three-layer multi-guide post structure. Through the stepped snap-fit ​​structure of multiple limiting grooves and elastic locking points, the upper mold and middle mold are accurately positioned and moved in linkage on the guide posts, completing the automated process of loading medicine → pressing medicine → demolding, which greatly improves production efficiency and reduces labor costs.

[0014] (2) The multi-guide column frame linkage of the pressing mold provided by this utility model, with the four corner guide columns synchronously guiding the displacement of the three-layer module, can avoid off-center load while positioning, guiding and bearing.

[0015] (3) The pressing mold provided by this utility model realizes stepped limiting mold release. The limiting groove (401-404) controls the mold release sequence. In the early stage, the medicine column is always in contact with the upper punch and the lower punch, and the medicine column is sent to the bottom of the mold sleeve (the medicine column is smoothly ejected by the lower punch). After that, the upper mold and the middle mold can be removed to remove the medicine column on the lower mold. This method can ensure that the medicine column is separated with zero damage (pass rate ≥99%), ensure product quality, and improve product pass rate.

[0016] (4) The lower punch, upper punch, and mold sleeve of the pressing mold provided by this utility model are detachable and replaceable. By changing the shape of the lower punch and upper punch, the production requirements of different shaped medicine columns can be met. At the same time, by adjusting the specifications and quantity of the mold sleeve, it can be adapted to different medicine column specifications, fully demonstrating the dual advantages of quick change and strong compatibility. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of the three-layer multi-guide column frame-type drug compression mold of this utility model (with the second upper limit groove hidden);

[0019] Figure 2 This is an exploded view of the three-layer multi-guide-column frame-type drug-pressing mold of this utility model;

[0020] Figure 3 This is the front view of the three-layer multi-guide-column frame-type drug-pressing mold of this utility model;

[0021] Figure 4 This is a cross-sectional view of the three-layer multi-guide-column frame-type drug-pressing mold of this utility model in its natural state;

[0022] Figure 5 This is a cross-sectional view of the three-layer multi-guide-column frame-type drug compression mold of this utility model in the compression state;

[0023] Figure 6 This is a cross-sectional view of the three-layer multi-guide-column frame-type drug-pressing mold of this utility model in the demolding state.

[0024] Reference numerals: lower mold 1, middle mold 2, upper mold 3, guide post 4, lower punch 101, mold sleeve 201, upper punch 301, first upper limit groove 401, second upper limit groove 402, first middle limit groove 403, second middle limit groove 404. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] like Figures 1 to 6 As shown, this embodiment provides a three-layer multi-guide-post frame-type drug-pressing mold, including a lower mold 1, a middle mold 2, and an upper mold 3; wherein, the bottom surface of the lower mold 1 is provided with a lower punch 101, and the lower mold 1 is provided with at least three guide posts 4 distributed in different directions near the outer edge; the middle mold 2 is provided with at least one mold sleeve 201; the upper mold 3 is provided with an upper punch 301 matching the number of mold sleeves 201; the guide posts 4 are provided with limiting grooves that engage with the middle mold 2 and the upper mold 3, and the middle mold 2 and the upper mold 3 are arranged sequentially on the guide posts 4 from bottom to top.

[0028] In this embodiment, the shapes of the lower punch 101 and the upper punch end are designed according to the shape of the pressed and formed propellant (the shapes of the lower punch and the upper punch end are adapted to the shape of the propellant), and are bullet-shaped, round-headed, or flat-headed. The number of lower punches 101 matches the number of mold sleeves 201, and they extend into the mold sleeves 201 to form a loading cavity (not marked) with a lower end sealed.

[0029] Furthermore, such as Figure 2As shown, in this embodiment, the lower die 1 is provided with a lower assembly hole (unmarked), and the lower punch 101 is detachably mounted on the lower assembly hole; the middle die 2 is provided with a middle assembly hole (unmarked), and the die sleeve 201 is detachably mounted on the middle assembly hole; the upper die 3 is provided with an upper assembly hole (unmarked), and the upper punch 301 is detachably mounted on the upper assembly hole; this method allows for easy replacement of the upper punch, lower punch, and die sleeve according to the required size or shape of the propellant, so that the die can meet the needs of propellant of different specifications and shapes.

[0030] Furthermore, such as Figure 1 , Figure 2 As shown, in this embodiment, the lower mold 1, the middle mold 2, and the upper mold 3 are all rectangular structures, and there are four guide pillars 4, which are distributed at the four corners of the lower mold 1.

[0031] It should be noted that the number of guide pillars is not limited in this embodiment, as long as the number of guide pillars is greater than or equal to three, to ensure the stability of the middle mold and the upper mold installation; in actual operation, the number of guide pillars can be increased as needed, of course, four are preferred.

[0032] Furthermore, such as Figures 4 to 6 As shown, in this embodiment, the guide post is provided with a first upper limit groove 401 and a second upper limit groove 402 near the upper part, and a first middle limit groove 403 and a second middle limit groove 404 near the lower part. The first upper limit groove 401 is used to fix the upper mold 3 in the initial state; the second upper limit groove 402 is used to fix the upper mold 3 in the molding state; the first middle limit groove 403 is used to fix the middle mold in the demolding state; and the second middle limit groove 404 is used to fix the middle mold in both the initial state and the molding state.

[0033] In this embodiment, the first upper limit groove 401 and the second upper limit groove 402 are disposed on the same guide post 4 or on different guide posts 4, and the first middle limit groove 403 and the second middle limit groove 404 are disposed on the same guide post 4 or on different guide posts 4. Of course, it is necessary to ensure that the limit grooves with the same function are distributed at the same height position of the three guide posts, that is, the guide posts 4 at least in three different directions are provided with limit grooves with the same function at the same height position, so as to ensure that the middle mold 2 and the upper mold 3 can be stably engaged in the designated position of the guide post 4.

[0034] It should be noted that in this embodiment, the specific number of the first upper limit groove 401, the second upper limit groove 402, the first middle limit groove 403, and the second middle limit groove 404, and the guide pillars on which they are located, can be adjusted according to the number of guide pillars. For example, when there are four guide pillars 4, the above four types of limit grooves can be set on each guide pillar 4 at the same time. That is, the guide pillar 4 is provided with the first upper limit groove 401 and the second upper limit groove 402, which are engaged with the upper mold 3, from top to bottom near the upper part. The guide pillar 4 is provided with the first middle limit groove 403 and the second middle limit groove 404, which are engaged with the middle mold 2, from top to bottom near the lower part. Of course, the above four types of limit grooves can also be selectively set on different guide pillars by adding guide pillars. This application does not limit the arrangement of the above four types of limit grooves.

[0035] In this embodiment, the upper mold 3 and the middle mold 2 are provided with elastic locking points (not shown) at the positions that contact the limiting groove. The elastic locking points are engaged in the limiting groove. The elastic locking points can adopt existing structures, such as spring steel ball structures. This application does not limit the specific form of the elastic locking points. Any elastic locking point of any form or structure that can be engaged in the limiting groove and can be disengaged from the limiting groove under the action of external force is acceptable. It is not a key point of this application and will not be described in detail.

[0036] To enable those skilled in the art to clearly understand the entire pressing process of the three-layer multi-guide-column frame-type pressing mold, the following is a detailed explanation. Figures 4 to 6 A detailed introduction is provided, including the following steps:

[0037] Step 1. First, remove the upper mold 3 and load the ammunition into the loading chamber;

[0038] Step 2. Install the upper mold 3 onto the guide post 4. The upper mold 3 is engaged in the first upper limit groove 401 of the guide post 4. At this time, the upper punch 301 extends into the mold sleeve 201 (e.g., Figure 4 );

[0039] Step 3. Fix the middle mold 2, drive the upper mold 3 to move along the guide post 4 to the second upper limit groove 402, or simultaneously drive the lower mold 1 to move upward, that is, pressure can be applied unidirectionally or bidirectionally during the molding process. At this time, the middle mold 2 is engaged in the second upper limit groove (e.g., Figure 5 );

[0040] Step 4. After molding is completed, the middle mold 2 remains stationary, while the lower mold 1 and upper mold 3 move downwards synchronously. The upper punch 301, the propellant cartridge, and the lower punch 101 move downwards synchronously, delivering the propellant cartridge to the lowest end of the mold sleeve 201. The middle mold 2 moves relative to the guide post 4 and engages in the first limiting groove 403 of the guide post (e.g., ...). Figure 6 );

[0041] Step 5. Remove the upper mold 3 and the middle mold 2 in sequence. At this time, the medicine stick will remain on the lower punch 101. You can directly remove the medicine stick.

[0042] The above describes specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A three-layer multi-stem frame press powder die characterized by, The device includes a lower die, a middle die, and an upper die. The lower die has a bottom punch on its bottom surface and at least three guide posts distributed in different directions near its outer edge. The guide posts have limiting grooves that engage with the middle die and the upper die. The limiting grooves include a first upper limiting groove and a second upper limiting groove located on the upper part of the guide post, and a first middle limiting groove and a second middle limiting groove located on the lower part of the guide post. The middle die has at least one mold sleeve, and the upper die has an upper punch that matches the number of mold sleeves. The middle die and the upper die are arranged sequentially from bottom to top on the guide posts, and each has elastic locking points that engage with the limiting grooves of the guide posts.

2. The three-layer multi-stem frame press powder die according to claim 1, characterized in that, The lower die bottom surface can be detachably installed with a lower punch. The number of lower punches matches the number of die sleeves. The lower punches extend into the die sleeves and combine with the die sleeves to form a drug loading cavity with a lower end seal. The shapes of the lower punches and upper punches are adapted to the shape of the drug column.

3. The three-layer multi-stem frame powder charge die of claim 1, wherein, The first upper limit groove is used to fix the upper mold in the initial state; the second upper limit groove is used to fix the upper mold in the molding state; the first middle limit groove is used to fix the middle mold in the demolding state; the second middle limit groove is used to fix the middle mold in both the initial state and the molding state.

4. The three-layer multi-stem frame powder charge die of claim 1, wherein, The elastic locking point is a spring steel ball structure, which is engaged in the limiting groove to achieve positioning.

5. The three-layer multi-stem frame press powder die of claim 3, wherein, The first upper limit groove and the second upper limit groove are disposed on the same guide post or on different guide posts, and the first middle limit groove and the second middle limit groove are disposed on the same guide post or on different guide posts. Limit grooves with the same function are distributed at the same height position on the three guide posts.

6. A three-layer multi-stem frame powder charge die according to claim 5, characterized in that, The guide pillars are four in number and distributed at the four corners of the lower mold. Each guide pillar is provided with a first upper limit groove, a second upper limit groove, a first middle limit groove, and a second middle limit groove.

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