A one-piece molding device for sealing the ignition element

Abstract

This utility model discloses a one-time forming device for closing the ignition element, belonging to the field of ammunition detonation technology. The device mainly includes a housing, a connecting push rod, a rectangular mold spring, a pre-forming punch, a final forming punch, and a closing die. The connecting push rod is connected to an external hydraulic press, the final forming punch is fixed to the connecting push rod, and the pre-forming punch is fixed to the housing. The rectangular mold spring is sleeved on the connecting push rod and positioned between the connecting push rod and the housing. During operation, the hydraulic press drives the connecting push rod downwards, and the spring force first pushes the housing and the pre-forming punch to complete the pre-forming of the ignition element; when the pressure exceeds the spring preload, the connecting push rod directly drives the final forming punch for final forming. This utility model integrates the pre-forming and final forming processes into a single press stroke, achieving a high degree of automation and significantly improving production efficiency; simultaneously, its step-by-step force application mechanism reduces the impact on the punch, extends the device's service life, and ensures consistent closing forming quality.

Description

Technical Field

[0001] This utility model relates to the field of ammunition blasting technology, and in particular to a one-time forming device for closing the opening of an ignition element. Background Technology

[0002] As a core component of ammunition, the reliability of the ignition element directly affects the ammunition's performance. During assembly, the ports of the ignition element housing are extruded and shaped using precision molds to tightly enclose the internal ignition propellant and other components, forming an effective mechanical seal. This sealing structure effectively isolates external moisture and impurities, preventing the ignition element from malfunctioning due to moisture, while ensuring it can withstand the high-pressure impact generated by the propellant gases.

[0003] Traditional ignition element finishing processes often employ two or more forming methods. This involves pre-forming the component using one set of molds and then transferring it to another set of molds for final forming. This multi-step process suffers from low production efficiency, cumbersome operation, and large footprint, making it unsuitable for high-volume, automated production.

[0004] To address the aforementioned issues, existing technologies have developed devices designed for one-step forming and closing. However, these devices often suffer from significant drawbacks: the closing punch experiences high impact forces during operation, leading to premature wear or damage and a short lifespan; furthermore, due to flawed structural design, the forming process exhibits poor stability and consistency, making it difficult to guarantee the uniformity of closing quality for each ignition element and posing safety hazards.

[0005] Therefore, there is an urgent need in this field for a one-time forming device for ignition element closing that can significantly improve production efficiency while ensuring long service life and high quality consistency. Utility Model Content

[0006] The purpose of this invention is to provide a one-time molding device for closing the ignition element. It aims to integrate the traditional pre-forming and final forming processes into a single pressurization stroke by optimizing the internal structure and transmission logic of the device, thereby automatically completing them sequentially. This solves the problems of low production efficiency, short mold life, and poor product quality consistency in the existing technology.

[0007] This utility model is achieved using the following technical solution: a one-time forming device for closing the ignition element, comprising a housing, a connecting push rod, a mold spring, a pre-forming punch, a final forming punch, and a closing die; the connecting push rod is used to connect to an external pressure mechanism; the mold spring is sleeved on the connecting push rod; the pre-forming punch is connected to the housing; the final forming punch is connected to the connecting push rod and is at least partially housed within the pre-forming punch; the closing die is used to set the ignition element; the connecting push rod is configured to sequentially drive the pre-forming punch and the final forming punch toward the closing die under external pressure, so as to perform closing processing on the ignition element set in the closing die.

[0008] Furthermore, the mold spring is a rectangular mold spring.

[0009] Furthermore, the connecting push rod is connected to the final forming punch via a thread.

[0010] Furthermore, the housing is connected to the preformed punch via a thread.

[0011] Furthermore, one end of the mold spring contacts the shoulder on the connecting push rod, and the other end contacts the inner end face of the housing.

[0012] Furthermore, the die-cutting mold has a cavity inside for accommodating and positioning the ignition element.

[0013] Furthermore, the external pressure mechanism is a hydraulic press.

[0014] The one-time forming device for closing the ignition element described in this utility model has the following advantages: This invention integrates the traditional separate two-stage finishing process into a single working stroke of a single device for automatic completion, eliminating intermediate transfer and repositioning steps, greatly shortening the processing time of a single workpiece, and is particularly suitable for large-scale continuous production, resulting in a qualitative improvement in production efficiency.

[0015] The device uses a mold spring as the core element for force transmission and conversion, forming a buffered, phased force application process. The pre-forming punch and the final forming punch do not bear the maximum impact load simultaneously, but act on the workpiece sequentially and smoothly, effectively reducing the wear and fatigue of the punch, significantly extending the service life of key vulnerable parts, and reducing equipment maintenance costs.

[0016] The mechanical structure ensures the sequence and force of the pre-forming and final forming stages. This mandatory action logic eliminates the uncertainty of human operation, guarantees the stability and repeatability of the closing process parameters of each ignition element, thereby ensuring a high degree of consistency in the closing forming quality of the product and improving the product's safety and reliability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. 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 the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; In the figure, 1-shell, 2-connecting push rod, 3-rectangular mold spring, 4-pre-forming punch, 5-final forming punch, 6-closing die, 7-ignition element. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Example

[0021] like Figure 1As shown, this utility model embodiment provides a one-time forming device for closing the ignition element, mainly composed of a housing 1, a connecting push rod 2, a rectangular mold spring 3, a pre-forming punch 4, a final forming punch 5, and a closing mold 6. The closing mold 6 is used to position the ignition element 7, which includes the housing port and internal components. One end of the connecting push rod 2 is provided with an external thread for threaded connection with the pressure rod of the hydraulic press; the other end of the connecting push rod 2 is fixedly connected to the final forming punch 5 by a thread. The housing 1 has a hollow internal structure. One end of the housing 1 is threadedly connected to the pre-forming punch 4, and the other end of the housing 1 is slidably fitted with the connecting push rod 2, allowing the connecting push rod 2 to move axially within the housing 1. The rectangular mold spring 3 is sleeved on the outside of the connecting push rod 2. One end of the rectangular mold spring 3 contacts the shoulder of the connecting push rod 2, and the other end of the rectangular mold spring 3 contacts the inner end face of the housing 1. The rectangular mold spring 3 has a preload for buffering and transmitting force. The pre-forming punch 4 is located at the front end of the housing 1. The pre-forming punch 4 and housing 1 are connected and fixed together by threads, with the punch head facing the closing die 6. The final forming punch 5 is located inside the pre-forming punch 4 and is connected to the connecting push rod 2 by threads. The final forming punch 5 can slide axially within the inner cavity of the pre-forming punch 4. The closing die 6 is fixedly installed on the external support structure. The closing die 6 has a cavity inside to accommodate and position the ignition element 7. The closing portion of the ignition element 7 faces the pre-forming punch 4 and the final forming punch 5. The end face of the pre-forming punch 4 contacts the closing portion of the ignition element 7 during movement, and the end face of the final forming punch 5 also contacts the closing portion of the ignition element 7 during movement.

[0022] The device operates based on the pressure provided by the hydraulic press, and is divided into two stages: pre-forming and final forming. When the hydraulic press starts, the press rod moves downward, pushing the connecting push rod 2 downward. The connecting push rod 2 transmits force to the housing 1 through the rectangular mold spring 3. Due to the pre-pressure of the rectangular mold spring 3, the housing 1 and the pre-forming punch 4 move downward as a whole. In this stage, the pre-forming punch 4 first contacts the closing part of the ignition element 7 and performs preliminary extrusion deformation on the housing port, causing plastic deformation of the closing part of the ignition element 7, gradually encasing the internal components. When the pre-forming punch 4 moves to contact the upper end face of the closing mold 6, the pre-forming punch 4 stops moving, completing the pre-forming process of the ignition element 7.

[0023] As the hydraulic press pressure continues to increase, when the pressure exceeds the preload of the rectangular mold spring 3, the connecting push rod 2 overcomes the spring force and continues to move downward, compressing the rectangular mold spring 3. The connecting push rod 2 drives the final forming punch 5 to move downward, extending from the inner cavity of the pre-forming punch 4 and contacting the closing part of the ignition element 7. The final forming punch 5 performs a secondary extrusion on the pre-formed closing part, further deforming it to the final formed state, forming a tight mechanical seal structure. When the final forming punch 5 moves to contact the inner step of the pre-forming punch 4, it stops moving, completing the final forming process of the ignition element 7. Afterward, the hydraulic press is depressurized, and the connecting push rod 2 resets under the rebound action of the rectangular mold spring 3, causing the final forming punch 5 to retract into the pre-forming punch 4. At the same time, the housing 1 and the pre-forming punch 4 rise as a whole, the device returns to its initial position, and the ignition element 7 can be removed from the closing mold 6.

[0024] Through the aforementioned structural design, this one-step forming device exhibits significant technical advantages. Firstly, the device integrates the traditional two-step sealing process into a single operation, achieving pre-forming and final forming in continuous motion, greatly improving production efficiency and making it suitable for mass production. Secondly, the use of a rectangular mold spring 3 as a force transmission and buffer element avoids direct impact. The contact surfaces of the pre-forming punch 4 and the final forming punch 5 experience uniform force during movement, reducing wear and extending the device's service life. Simultaneously, based on the mature two-step sealing principle, it ensures consistent sealing quality. The sealing portion of the ignition element 7 effectively isolates moisture and impurities and withstands the high-pressure impact of propellant gases. Furthermore, the device has a compact structure and reliable connections. Threaded connections and sliding fits ensure the precision and stability of movement, reducing maintenance requirements. Therefore, this device surpasses traditional processes in efficiency, lifespan, and reliability, meeting the high requirements of ignition element manufacturing in the field of ammunition detonation.

[0025] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A one-piece molding device for closing the end of an ignition element, characterized in that, The device includes a housing (1), a connecting push rod (2), a mold spring (3), a pre-forming punch (4), a final forming punch (5), and a closing die (6); the connecting push rod (2) is used to connect to an external pressure mechanism; the mold spring (3) is sleeved on the connecting push rod (2); the pre-forming punch (4) is connected to the housing (1); the final forming punch (5) is connected to the connecting push rod (2) and is at least partially housed within the pre-forming punch (4); the closing die (6) is used to house an ignition element (7); the connecting push rod (2) is configured to sequentially drive the pre-forming punch (4) and the final forming punch (5) toward the closing die (6) under external pressure to perform closing processing on the ignition element (7) housed within the closing die (6).

2. The one-time forming device for closing the ignition element according to claim 1, characterized in that, The mold spring (3) is a rectangular mold spring.

3. The one-time forming device for closing the ignition element according to claim 1, characterized in that, The connecting push rod (2) and the final forming punch (5) are connected by threads.

4. The one-time forming device for closing the ignition element according to claim 1, characterized in that, The housing (1) and the preformed punch (4) are connected by threads.

5. A one-time forming device for closing the end of an ignition element according to claim 1, characterized in that, One end of the mold spring (3) is in contact with the shoulder on the connecting push rod (2), and the other end is in contact with the inner end face of the housing (1).

6. A one-time forming device for closing the end of an ignition element according to claim 1, characterized in that, The closing mold (6) has a cavity inside for accommodating and positioning the ignition element (7).

7. A one-time forming device for closing the end of an ignition element according to claim 1, characterized in that, The external pressure mechanism is a hydraulic press.

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