A pressing die for large bore inverted cone explosive grain

Abstract

The present application relates to a kind of pressing mould for large aperture band inverted cone explosive grain, including bottom punch, the bottom of the bottom punch is provided with ejector rod, the bottom punch is installed at the top end of ejector rod, the outside of the ejector rod is provided with limit sleeve, the top of the limit sleeve is provided with forming die sleeve, the middle part of the forming die sleeve is provided with forming cavity, and the forming cavity is used to press and form the grain workpiece, the inside of the forming cavity is provided with top punch for material pressing, and material is pressed and formed inside forming cavity by top punch and bottom punch, when pressing, the top of top punch is driven by driving force, and the top of the forming die sleeve can be installed with demoulding sleeve;It is difficult to eject for the grain column with conical structure in the prior art by using reverse ejecting mode, it is difficult to assemble due to the large size of the mould, and the grain column is easily damaged by sudden drop and collision with punch.

Description

Technical Field

[0001] This invention relates to the field of explosives production equipment technology, specifically to a pressing mold for large-diameter explosive charges with inverted cones. Background Technology

[0002] To ensure the safety of the compression molds for large-aperture propellant grains, the molds designed according to the principles of propellant compression mold design are extremely heavy, resulting in very high labor intensity when assembling the molds during the compression process. For propellant grains with a conical structure, a forward compression and reverse demolding method is generally used. Because the mold assembly platform is high off the ground, personnel cannot easily reverse the mold while standing on the ground; they need to climb onto the operating platform to do so. Furthermore, this design, when assembled with the demolding device, results in a total height far exceeding the height of the explosion-proof window. This makes it impossible to assemble the entire demolding device outside the explosion-proof room; some mold components require opening the explosion-proof door and entering the explosion-proof room for assembly. Moreover, this demolding method easily leads to sudden drops and damage to the propellant grains, as well as injuries from impacts with the punch.

[0003] To address the aforementioned shortcomings, a technical solution is provided. Summary of the Invention

[0004] The technical problem to be solved by this invention is as follows:

[0005] In the existing technology, the reverse demolding method is difficult for propellant columns with conical structures. The large size of the mold makes assembly difficult and can easily cause the propellant column to fall and be damaged by the punch.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A pressing die for a large-diameter explosive charge with an inverted cone shape includes a bottom punch, a ejector rod at the bottom of the bottom punch, the bottom punch being mounted on the top of the ejector rod, a limiting sleeve sleeved around the ejector rod, a forming die sleeve at the top of the limiting sleeve, and a forming cavity penetrating through the middle of the forming die sleeve. The forming cavity is used to press and shape the material into an explosive charge workpiece. A top punch, capable of being raised and lowered, is also provided inside the forming cavity to press the material. The top punch, in conjunction with the bottom punch, presses and shapes the material within the forming cavity. During pressing, the top of the top punch is driven by a driving force to press the material. During demolding, a demolding sleeve can be installed on the top of the forming die sleeve. Driven by the driving force, the demolding sleeve moves downwards, thereby demolding the workpiece.

[0008] Furthermore, both the bottom punch and the top punch are adapted to the forming cavity.

[0009] Furthermore, a worktable is provided at the bottom of the ejector rod, and a support plate is fixedly provided at the bottom of the ejector rod. The ejector rod is mounted on the worktable via the support plate, and the limiting sleeve is placed on the ejector rod via the support plate.

[0010] Furthermore, a mounting base is fixedly provided at the bottom of the bottom punch, and a mounting groove adapted to the mounting base is opened at the top of the ejector rod. The mounting base is snapped into and slidably disposed inside the mounting groove.

[0011] Furthermore, the limiting sleeve includes two symmetrically arranged and separable annular plates. The opposite sides of the two annular plates are fixed by snap-fitting. The two annular plates are spliced ​​together to form a limiting sleeve, and an opening is provided through the middle of the limiting sleeve.

[0012] Furthermore, the limiting sleeve has a fixing groove on each of the two annular plates facing away from each other, and a fixing handle can be installed inside the fixing groove.

[0013] Furthermore, the punch includes a punch head, one end of which is fixedly provided with a traction seat, and the end of the traction seat is fixedly connected with a traction handle by bolts, and the outer surface of the traction handle is provided with external threads.

[0014] Furthermore, the outer surface of the punch is provided with a plurality of venting grooves, which are arranged in a ring array on the outer side of the punch.

[0015] Furthermore, the bottom of the demolding sleeve is provided with a boss that matches the top of the molding sleeve, and the middle of the demolding sleeve is provided with an opening.

[0016] Furthermore, several pads are installed on the side of the limiting sleeve opposite to the forming mold sleeve.

[0017] The beneficial effects of this invention are:

[0018] In this invention, during molding, the ejector rod is first installed on the worktable via a support plate. Then, the bottom punch is installed on the top of the ejector rod through the cooperation of the mounting seat and the mounting groove. Next, two annular plates are joined together to form a limiting sleeve. Two pads are symmetrically installed on the top of the limiting sleeve, and the molding die is placed on the pads, thereby allowing material to be introduced into the molding cavity. Then, the top punch is placed inside the molding cavity. During pressing, the top of the top punch is driven by the driving force of the driving component, thereby pressing the material. The arrangement of several venting grooves facilitates venting during the pressing process, improving pressing safety. After removing the pads, the bottom punch and top punch achieve bidirectional force pressing of the propellant, increasing the molding density at the bottom of the propellant and thus improving the molding quality of the workpiece.

[0019] During demolding, the two annular plates are first separated by a fixed handle in the fixed groove, facilitating the removal of the limiting sleeve. A demolding sleeve is then installed on top of the forming mold sleeve. Driven by the driving component, the demolding sleeve moves the forming mold sleeve downwards, placing it outside the ejector rod. The protrusion prevents slippage when the driving component squeezes the demolding sleeve, improving demolding stability. The demolding sleeve is then separated, and the punch is separated by the traction handle and traction seat, followed by separation of the workpiece. Separating the mounting seat from the mounting groove allows the bottom punch to disengage from the ejector rod, facilitating workpiece demolding. This demolding method achieves reverse demolding, eliminating the need for reverse demolding of the mold sleeve, reducing worker labor intensity, increasing production efficiency, and minimizing damage to the propellant, thus improving product quality. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the overall structure during material pressing in this invention;

[0022] Figure 2 This is a schematic diagram of the workpiece demolding process in this invention;

[0023] Figure 3 This is a schematic diagram of the structure in this invention where the forming mold sleeve is squeezed to the outside of the ejector pin;

[0024] Figure 4 This is a schematic diagram of the top punch structure in this invention;

[0025] Figure 5 This is a schematic diagram of the installation structure of the bottom punch and the ejector pin in this invention;

[0026] Figure 6 This is a schematic diagram of the demolding sleeve in this invention.

[0027] In the diagram: 1. Bottom punch; 2. Ejection rod; 3. Limiting sleeve; 4. Forming mold sleeve; 5. Top punch; 6. Ejection sleeve; 7. Worktable; 8. Pad; 11. Mounting seat; 21. Mounting groove; 41. Forming cavity; 51. Punch; 52. Traction seat; 511. Vent groove; 521. Traction handle; 61. Boss. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-6 The present invention provides a technical solution:

[0030] A pressing die for a large-diameter explosive charge with an inverted cone shape includes a bottom punch 1. A ejector rod 2 is located at the bottom of the bottom punch 1, and the bottom punch 1 is mounted on the top of the ejector rod 2. A limiting sleeve 3 is sleeved around the outside of the ejector rod 2, and a forming die sleeve 4 is located on the top of the limiting sleeve 3. A forming cavity 41 is formed through the middle of the forming die sleeve 4. The forming cavity 41 is used to press and form the explosive charge workpiece. A top punch 5, which presses the material, is vertically and vertically mounted inside the forming cavity 41. The top punch 5, in conjunction with the bottom punch 1, presses the material inside the forming cavity 41. During pressing, the top of the top punch 5 is driven by a driving force to press the material. During demolding, a demolding sleeve 6 can be installed on the top of the forming die sleeve 4. The demolding sleeve 6, driven by the driving force, moves the forming die sleeve 4 downwards, facilitating demolding of the workpiece.

[0031] The driving component can be a hydraulic press or a hydraulic cylinder, or other components that can achieve top-down pressure.

[0032] Both the bottom punch 1 and the top punch 5 are adapted to the forming cavity 41, thereby preventing material leakage.

[0033] The bottom of the ejector rod 2 is provided with a worktable 7, and a support plate is fixedly provided at the bottom of the ejector rod 2. The ejector rod 2 is installed on the worktable 7 through the support plate, and the limiting sleeve 3 is placed on the ejector rod 2 through the support plate.

[0034] To facilitate the disengagement of the bottom punch 1 from the ejector rod 2, a mounting base 11 is fixedly provided at the bottom of the bottom punch 1. The top of the ejector rod 2 has a mounting groove 21 that matches the mounting base 11. The mounting base 11 is snapped into and slidably disposed within the mounting groove 21, thereby enabling the installation and removal of the bottom punch 1 from the ejector rod 2. In use, after the pressed workpiece is removed, the bottom punch 1 is disengaged from the ejector rod 2 by separating the mounting base 11 from the mounting groove 21, making it convenient to use.

[0035] The limiting sleeve 3 includes two symmetrically arranged and separable annular plates. The two annular plates are fixed on opposite sides by snap-fit. The two annular plates are spliced ​​together to form the limiting sleeve 3. The limiting sleeve 3 has an opening in the middle to facilitate wrapping and supporting the ejector rod 2.

[0036] The limiting sleeve 3 has a fixing groove on one side of each of the two annular plates facing away from each other. A fixing handle can be installed inside the fixing groove, which makes it easy to separate and merge the two annular plates, thus improving the convenience of operation.

[0037] The punch 5 includes a punch 51, one end of which is fixedly provided with a traction seat 52. The end of the traction seat 52 is fixedly connected with a traction handle 521 by bolts. The outer surface of the traction handle 521 is provided with external threads, so as to facilitate the traction and lifting of the punch 51 by the traction handle 521, thereby improving the demolding efficiency.

[0038] The outer surface of the punch 51 is provided with a plurality of venting grooves 511, which are arranged in a ring array on the outside of the punch 51. The arrangement of the plurality of venting grooves 511 facilitates the venting of air during the pressing process and improves the pressing safety.

[0039] The bottom of the demolding sleeve 6 is provided with a boss 61 that matches the top of the forming mold sleeve 4. The boss 61 is provided to facilitate the driving component to squeeze the demolding sleeve 6 to demold and avoid slippage with the forming mold sleeve 4, thereby improving the demolding stability. The demolding sleeve 6 has an opening in the middle, which facilitates the passage of the punch 5 during demolding.

[0040] To improve the material pressing effect, several pads 8 are installed on the side of the limiting sleeve 3 opposite to the forming mold sleeve 4. By setting the pads 8, after the pads 8 are removed before demolding, the bottom punch 1 and the top punch 5 can achieve bidirectional force pressing on the drug column, which improves the forming density of the drug column bottom and thus improves the forming quality of the workpiece.

[0041] During operation, the ejector rod 2 is first installed on the worktable 7 via the support plate. Then, the bottom punch 1 is installed on the top of the ejector rod 2 through the cooperation of the mounting base 11 and the mounting groove 21. Next, the two annular plates are joined together to form a limiting sleeve 3. Two pads 8 are symmetrically installed on the top of the limiting sleeve 3, and the forming mold sleeve 4 is placed on the pads 8, thereby allowing material to be introduced into the forming cavity 41. Then, the top punch 5 is placed inside the forming cavity 41. During pressing, the top of the top punch 5 is driven by the driving force of the driving component, thereby pressing the material. The arrangement of several venting grooves 511 facilitates venting during the pressing process of the punch 51, improving pressing safety. After removing the pads 8, the bottom punch 1 and the top punch 5 achieve bidirectional force pressing of the precipitate, increasing the forming density at the bottom of the precipitate, thereby improving the forming quality of the workpiece.

[0042] During demolding, the two annular plates are first separated by the fixed handle fixed in the fixed groove, which facilitates the removal of the limiting sleeve 3. Then, the demolding sleeve 6 is installed on the top of the forming mold sleeve 4. The demolding sleeve 6 moves the forming mold sleeve 4 downward under the drive of the driving component, so that the forming mold sleeve 4 moves to the outside of the ejection rod 2. The boss 61 is set to prevent slippage between the driving component and the forming mold sleeve 4 when the demolding is squeezed by the demolding component, thus improving the demolding stability. At this time, the demolding sleeve 6 is separated, and the punch 51 is separated by the traction handle 521 in conjunction with the traction seat 52. Then, the workpiece is separated to complete the demolding of the workpiece. By separating the mounting seat 11 from the mounting groove 21, the bottom punch 1 is disengaged from the ejection rod 2, which facilitates the demolding of the workpiece. Through this demolding method, reverse demolding is achieved without the need to reverse the mold sleeve for demolding, which reduces the labor intensity of workers, improves production efficiency, and makes the catalytic cylinder less likely to be damaged, thus improving product quality.

[0043] Working principle:

[0044] In use, during molding, the ejector rod 2 is first installed on the worktable 7 via a support plate. Then, the bottom punch 1 is installed on the top of the ejector rod 2 through the cooperation of the mounting base 11 and the mounting groove 21. Next, two annular plates are joined together to form a limiting sleeve 3. Two pads 8 are symmetrically installed on the top of the limiting sleeve 3, and the molding die sleeve 4 is placed on the pads 8, thereby allowing material to be introduced into the molding cavity 41. Then, the top punch 5 is placed inside the molding cavity 41. During pressing, the top of the top punch 5 is driven by the driving force of the driving component, thereby pressing the material. The arrangement of several venting grooves 511 facilitates venting during the pressing process of the punch 51, improving pressing safety. After removing the pads 8, the bottom punch 1 and the top punch 5 achieve bidirectional force pressing of the propellant, increasing the molding density at the bottom of the propellant, thereby improving the molding quality of the workpiece.

[0045] During demolding, the two annular plates are first separated by the fixed handle fixed in the fixed groove, which facilitates the removal of the limiting sleeve 3. Then, the demolding sleeve 6 is installed on the top of the forming mold sleeve 4. The demolding sleeve 6 moves the forming mold sleeve 4 downward under the drive of the driving component, so that the forming mold sleeve 4 moves to the outside of the ejection rod 2. The boss 61 is set to prevent slippage between the driving component and the forming mold sleeve 4 when the demolding is squeezed by the demolding component, thus improving the demolding stability. At this time, the demolding sleeve 6 is separated, and the punch 51 is separated by the traction handle 521 in conjunction with the traction seat 52. Then, the workpiece is separated to complete the demolding of the workpiece. By separating the mounting seat 11 from the mounting groove 21, the bottom punch 1 is disengaged from the ejection rod 2, which facilitates the demolding of the workpiece. Through this demolding method, reverse demolding is achieved without the need to reverse the mold sleeve for demolding, which reduces the labor intensity of workers, improves production efficiency, and makes the catalytic cylinder less likely to be damaged, thus improving product quality.

[0046] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A pressing die for a large-diameter explosive charge with an inverted cone shape, comprising a bottom punch (1), characterized in that, The bottom of the bottom punch (1) is provided with a ejector rod (2), the bottom punch (1) is installed at the top of the ejector rod (2), the ejector rod (2) is sleeved with a limiting sleeve (3), the top of the limiting sleeve (3) is provided with a forming mold sleeve (4), the middle of the forming mold sleeve (4) is provided with a forming cavity (41), the forming cavity (41) is used to press the material to form a drug column workpiece, the inside of the forming cavity (41) is provided with a top punch (5) for pressing the material, the top punch (5) cooperates with the bottom punch (1) to press the material inside the forming cavity (41), during pressing, the top of the top punch (5) is driven by the driving force of the driving component to press the material, during demolding, the top of the forming mold sleeve (4) is installed with a demolding sleeve (6), the demolding sleeve (6) is driven by the driving component to move the forming mold sleeve (4) downward, thereby demolding the workpiece.

2. A pressing mold for large-diameter explosive charges with inverted cones according to claim 1, characterized in that, Both the bottom punch (1) and the top punch (5) are adapted to the forming cavity (41).

3. A pressing mold for large-diameter explosive charges with inverted cones according to claim 1, characterized in that, The bottom of the ejector rod (2) is provided with a worktable (7), and a support plate is fixedly provided at the bottom of the ejector rod (2). The ejector rod (2) is installed on the worktable (7) through the support plate, and the limiting sleeve (3) is placed on the ejector rod (2) through the support plate.

4. A pressing mold for large-diameter explosive charges with inverted cones according to claim 1, characterized in that, The bottom of the punch (1) is fixedly provided with a mounting base (11), and the top of the ejector rod (2) is provided with a mounting groove (21) that is compatible with the mounting base (11). The mounting base (11) is snapped into and slidably disposed inside the mounting groove (21).

5. A pressing mold for large-diameter explosive charges with inverted cones according to claim 1, characterized in that, The limiting sleeve (3) includes two symmetrically arranged and separable annular plates. The two annular plates are fixed on opposite sides by snap-fitting. The two annular plates are spliced ​​together to form the limiting sleeve (3). The limiting sleeve (3) has an opening in the middle.

6. A pressing mold for large-diameter explosive charges with inverted cones according to claim 5, characterized in that, The limiting sleeve (3) has a fixing groove on one side of each of the two annular plates facing away from each other, and a fixing handle is installed inside the fixing groove.

7. A pressing mold for large-diameter explosive charges with inverted cones according to claim 1, characterized in that, The punch (5) includes a punch (51), one end of which is fixedly provided with a traction seat (52), and the end of the traction seat (52) is fixedly connected with a traction handle (521) by bolts. The outer surface of the traction handle (521) is provided with external threads.

8. A pressing mold for large-diameter explosive charges with inverted cones according to claim 7, characterized in that, The outer surface of the punch (51) is provided with a plurality of exhaust grooves (511), and the plurality of exhaust grooves (511) are arranged in a ring array on the outside of the punch (51).

9. A pressing mold for large-diameter explosive charges with inverted cones according to claim 1, characterized in that, The bottom of the demolding sleeve (6) is provided with a boss (61) that matches the top of the molding sleeve (4), and the middle of the demolding sleeve (6) is provided with an opening.

10. A pressing mold for large-diameter explosive charges with inverted cones according to claim 1, characterized in that, Several pads (8) are installed on the side of the limiting sleeve (3) opposite to the forming mold sleeve (4).

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