Automatic pressing mold for tubular initiating explosive

Abstract

The utility model belongs to the field of pyrotechnics processing technology discloses a kind of tubular pyrotechnics automatic medicine pressing mould, including base (4), support rod (6), spring (5), inner sleeve (7), die sleeve (3), guide sleeve (2), punch (1);The base (4) is internally hollow structure, its bottom is provided as threaded hole, the inner sleeve (7) is screwed into the threaded hole of base (4);The lower end of support rod (6) passes through base (4), and inserts the center step bore of inner sleeve (7);The lower end of support rod (6) is provided with annular flange, the annular flange is used to support on the step surface of inner sleeve (7);Spring (5) is sleeved on support rod (6).The utility model's technical scheme solves the problem that tubular pyrotechnics is caused by the limitation of mould to rely on manual medicine pressing, mould can adapt to automatic medicine pressing process, improve production efficiency, improve production intrinsic safety.

Description

Technical Field

[0001] This utility model belongs to the field of pyrotechnics processing technology, specifically relating to an automated compression mold for tubular pyrotechnics. Background Technology

[0002] Tubular pyrotechnics are unit pyrotechnics whose outer shell is tubular, and which are filled with initiating explosives, ignition explosives, or other explosives to perform the functions of initiation, detonation transmission, ignition, and ignition transmission. Tubular pyrotechnics mainly include percussion caps, flame detonators, detonating cords, ignition tubes, and delay tubes. These pyrotechnics are widely used in the detonation transmission sequence of fuse warheads, and are produced in large quantities. The tubular shell walls of these pyrotechnics are relatively thin, generally 0.25mm to 0.5mm, and the charging pressure is generally greater than 100MPa. After the explosive is loaded, a cover plate is needed to close the opening. If the semi-finished product with the charged explosive is directly demolded, the stress release will cause the shell wall to expand. If it is then put back into the mold and the cover plate is placed to close the opening, it is almost impossible to put it back into the mold. Pyrotechnics manufacturers generally use a continuous operation method of charging and closing the opening. By placing a shim under the mold during charging and removing the shim during closing, the upper end of the charged tubular shell protrudes above the mold, facilitating closure.

[0003] A typical tubular pyrotechnic charging mold consists of a base, an open gasket, a middle mold, a guide, and a punch. The base supports the tubular shell, the middle mold restricts its movement, and the guide and middle mold are positioned using axial and radial clearance fits. The open gasket is installed between the base and the middle mold to adjust the height of the tubular shell within the middle mold until it is flush with the mold's end face. After charging, the gasket is removed, and the middle mold is pressed down to eject the product. Alternatively, a thinner gasket can be used, making the upper end face of the tubular shell slightly higher than the mold's end face for easier closing. The open gasket adjustment process requires manual measurement and fitting, which is complex and difficult to automate.

[0004] With the increasing demand for safety development in the pyrotechnics industry and the advancement of automated manufacturing, domestic pyrotechnics manufacturers have developed a single-unit automated press for tubular pyrotechnics. The reason why the machine replaces the human in the pressing process and has not formed a continuous automated operation is that it is difficult to adjust the shims of the product at the height of the mold. Furthermore, tubular pyrotechnics are produced in large batches, generally tens of thousands of rounds, and manual or semi-automated pressing is inefficient and inherently unsafe. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The technical problem to be solved by this utility model is to provide a mold that can be adapted to a continuous automated pressing process.

[0007] (II) Technical Solution

[0008] To solve the above-mentioned technical problems, this utility model provides an automated compression mold for tubular pyrotechnic products, including a base 4, a support rod 6, a spring 5, an inner sleeve 7, a mold sleeve 3, a guide sleeve 2, and a punch 1;

[0009] The base 4 has an internal hollow structure with a threaded hole at its bottom. The inner sleeve 7 is screwed into the threaded hole of the base 4. The lower end of the support rod 6 passes through the base 4 and is inserted into the central stepped hole of the inner sleeve 7. The lower end of the support rod 6 is provided with an annular flange, which is used to support the inner sleeve 7 on the stepped surface. The spring 5 is sleeved on the support rod 6, and its two ends contact the annular flange of the support rod 6 and the top of the inner cavity of the base 4, respectively.

[0010] The mold sleeve 3 is positioned above the base 4, and the upper end of the support rod 6 is inserted into the central hole of the mold sleeve 3; the tube shell is positioned inside the central hole of the mold sleeve 3 and placed on the upper end face of the support rod 6; the support rod 6 can slide up and down in the mold sleeve 3; the guide sleeve 2 is positioned above the mold sleeve 3, and the punch 1 extends into the tube shell along the guide sleeve 2.

[0011] The spring is in a compressed state.

[0012] The position of the tube shell in the mold is adjusted by adjusting the length of the inner sleeve screwed into the base. Once the position is determined, the inner sleeve is fixed with screws.

[0013] Furthermore, after the drug is pressed, the push rod on the automated equipment enters through the hole in the base, compresses the spring, and lifts the support rod. At the same time, the support rod lifts the tube shell that has been filled with the drug.

[0014] Furthermore, a notch is provided at the axial 1 / 5 position of the inner sleeve external thread.

[0015] Furthermore, the outer surface of the base is milled with an anti-rotation platform to facilitate the insertion of a fixture for directional control.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. It solves the problem of relying on manual pressing of explosives due to the limitations of molds for tubular pyrotechnic products. The mold can be adapted to automated pressing processes, which improves production efficiency and inherent safety.

[0019] 2. The support rod can be adjusted up and down by rotating the inner sleeve, so that the same set of molds can be compatible with the same diameter but different height tube shells for filling, thus improving the versatility of the molds.

[0020] 3. By adjusting the diameter of the support rod, the inner diameter of the base, the inner diameter of the mold sleeve, the inner diameter of the guide, and the diameter of the punch, while keeping the other structural dimensions unchanged, it is possible to adapt to the press-filling process of tube shells with different diameters, thus forming a series of molds with good versatility.

[0021] 4. A notch is designed at approximately 1 / 5 of the axial length of the inner sleeve's external thread to provide some elasticity, ensuring that the inner sleeve and base are pressed together after assembly, thus stably supporting the tube shell.

[0022] 5. By setting the length from the lower end face of the base to the upper end face of the guide sleeve to be uniform, it is convenient to use the pressure plate to press the guide sleeve tightly, avoiding floating medicine when pouring medicine and causing safety hazards; the design of the lower end face of the base to the lower edge of the groove on the outer surface of the middle mold is uniform, so that when the guide sleeve is demolded, the pressure plate on the equipment will press the middle mold, avoiding the middle mold being lifted when the guide sleeve is removed, which would cause operational failure. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a traditional tubular pyrotechnic propellant pressing mold.

[0024] Figure 2 This is a schematic diagram of an automated mold structure for tubular pyrotechnic products provided by this utility model;

[0025] Figure 3 This is a schematic diagram of the base structure of an automated mold for tubular pyrotechnic products provided by this utility model;

[0026] Figure 4 This is a schematic diagram of the inner sleeve structure of an automated mold for tubular pyrotechnic products provided by this utility model;

[0027] Figure 5 This is a schematic diagram of the structure of an automated mold for tubular pyrotechnic products—a mold sleeve provided by this utility model;

[0028] Figure 6 This is a schematic diagram of a support rod structure for an automated mold for tubular pyrotechnic products provided by this utility model;

[0029] Figure 7 This is a schematic diagram of a guide sleeve structure for an automated mold for tubular pyrotechnic products provided by this utility model;

[0030] Figure 8 This is a schematic diagram of the punch structure of an automated mold for tubular pyrotechnic products provided by this utility model;

[0031] In the diagram: 1-punch; 2-guide sleeve; 3-die sleeve; 4-base; 5-spring; 6-support rod; 7-inner sleeve. Detailed Implementation

[0032] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0033] The automated compression mold structure for tubular pyrotechnic devices provided in this embodiment is as follows: Figure 2As shown, the assembly includes a base, support rod, spring, inner sleeve, die sleeve, guide sleeve, and punch. The installation method involves inserting the larger end of the support rod into the inner sleeve, aligning the support rod with the inner hole of the base, and screwing the thread of the inner sleeve into the thread of the base. The height of the punch is adjusted by rotating the inner sleeve until the upper end face of the die sleeve, after the reinforcing cap is fitted, is flush with the upper end face of the die sleeve. Then, the fixing screws are tightened to secure the position of the inner sleeve. The assembly of the punch, inner sleeve, and base is done manually, and the parts are loaded onto the fixture. The assembly of the guide sleeve, reinforcing cap, and punch is completed by the internal grippers, suction nozzle, and robotic arm of the equipment. The die hole and shaft use a clearance fit, generally adopting the GB1800 basic hole system fit. It is recommended that the tolerance fit between the punch and guide sleeve be f7 / G7, the tolerance fit between the guide sleeve and die sleeve be f7 / F8, and the tolerance fit between the die sleeve and support rod be g6 / F7.

[0034] The base structure provided in this embodiment is as follows: Figure 3 As shown, the base is designed with a cylindrical stepped structure. A flattened square platform is milled on the outer surface of the lower cylinder to prevent rotation and facilitate the insertion of a fixture to control the direction. The base is designed with connecting threads to connect and position the inner sleeve. The base is designed with a through hole of the same nominal outer diameter as the tube shell, through which the support rod passes to support the tube shell.

[0035] The inner sleeve structure provided in this embodiment is as follows: Figure 4 As shown, the inner sleeve is connected to the base by an external thread. A notch is designed at about 1 / 5 of the axial position of the external thread to facilitate the clamping and fixing of the spring. A countersunk hole is provided inside to place the support rod. The hexagonal hole on the bottom surface is designed to facilitate the insertion of an inner wrench to screw the inner sleeve into and out of the base. A threaded hole is designed on the bottom surface for installing screws. After the inner sleeve is properly adjusted, the position of the inner sleeve in the base is fixed.

[0036] The mold structure provided in this embodiment is as follows: Figure 5 As shown, a robotic gripper structure is designed on the outside of the mold sleeve to cooperate with the robotic arm of the drug loading production line. The design is uniform. A step is provided on the upper end face of the mold sleeve for axial and radial positioning and cooperation with the guide sleeve. The inner hole size D of the mold sleeve is the same as the nominal outer diameter of the tube shell.

[0037] The support rod structure provided in this embodiment is as follows: Figure 6 As shown, the support rod mates with the inner holes of the mold sleeve, base, and inner sleeve, and the large end of the support rod is easy to insert into the inner hole of the mold sleeve; the nominal diameter of the support rod is the same as the nominal outer diameter of the tube shell; the length of the support rod is adjusted according to the assembly of the base, inner sleeve, and mold sleeve, and the inner sleeve should not exceed the end face of the base as part of the boundary design.

[0038] The guide sleeve structure provided in this embodiment is as follows: Figure 7As shown, the guide sleeve is matched with the punch and the die set. The upper part of the guide sleeve is matched with the gripper of the robot arm. The structural dimensions are uniformly designed to match the gripping structure of the robot arm. The nominal size of the inner hole of the guide sleeve is consistent with the nominal size of the inner hole of the tube shell. The internal steps are designed for axial and radial positioning matching with the die sleeve.

[0039] The punch structure provided in this embodiment is as follows: Figure 8 As shown, the punch and guide sleeve are designed with the upper part of the punch fitting with the gripper of the robotic arm. The dimensions of the punch are uniformly designed to match the gripping structure of the robotic arm. The nominal outer diameter of the punch is consistent with the nominal inner diameter of the tube shell.

[0040] The automated compression mold for tubular pyrotechnics in this embodiment has been applied in the design of automated compression molds for tubular pyrotechnics such as detonators, percussion caps, and reinforcing caps, verifying that the mold can achieve automatic lifting and closing of the opening and demolding functions.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An automatic powder pressing die for tubular initiating explosive, characterized by comprising: The device comprises a base (4), a support rod (6), a spring (5), an inner sleeve (7), a die sleeve (3), a guide sleeve (2) and a punch (1). The base (4) is internally hollow, and its bottom is provided with a threaded hole, the inner sleeve (7) is screwed into the threaded hole of the base (4), the lower end of the support rod (6) passes through the base (4) and is inserted into the center stepped hole of the inner sleeve (7), the lower end of the support rod (6) is provided with an annular flange for supporting on the stepped surface of the inner sleeve (7), and the spring (5) is sleeved on the support rod (6) and in contact with the annular flange of the support rod (6) and the top of the inner cavity of the base (4) respectively. The die sleeve (3) is arranged above the base (4), the upper end of the support rod (6) is inserted into the middle hole of the die sleeve (3), the tube shell is arranged in the middle hole of the die sleeve (3) and placed on the upper end surface of the support rod (6), the support rod (6) can slide up and down in the die sleeve (3), the guide sleeve (2) is arranged above the die sleeve (3), and the punch (1) extends into the tube shell along the guide sleeve (2).

2. The automatic powder pressing die for tubular initiating explosive as claimed in claim 1, wherein The spring is in a compressed state.

3. The automatic powder pressing die for tubular initiating explosive as claimed in claim 1, wherein The length of the inner sleeve screwed into the base is adjusted, and then the position of the tube shell in the die sleeve is adjusted, and the position is fixed by using a screw after being determined.

4. The automatic powder pressing die for tubular initiating explosive as claimed in claim 1, wherein After the pressing of the medicine is completed, the automatic equipment enters the top rod from the hole of the base, compresses the spring to lift the support rod, and the support rod simultaneously lifts the tube shell filled with the medicine.

5. The automatic tubular pyrotechnic press powder mold according to claim 1, wherein The outer thread of the inner sleeve is provided with an opening at 1 / 5 of the axial position.

6. The automatic tubular pyrotechnic press powder mold according to claim 1, wherein The outer surface of the base is milled with an anti-rotation table to facilitate the control of the direction of the fixture.

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