A five-beam four-column oil press's grain column pressing and die withdrawing device

Abstract

This invention provides a drug column pressing and demolding device for a five-beam four-column hydraulic press. It includes a hydraulic press body (1), a drug column mold (4) on the hydraulic press body (1), an upper punch (4a) inside the drug column mold (4), and a pressing and demolding component corresponding to and cooperating with the drug column mold (4) on the hydraulic press body (1). The invention is characterized by: a lower mold groove (8) corresponding to the drug column mold (4) on the hydraulic press body (1), an adjusting pad ring (9) connected to the lower mold groove (8), and a drug ejector assembly (11) on the lower mold groove (8). This invention has a simple structure, is easy to use, reduces the number of times the mold pad needs adjustment, facilitates adjustment of the pressing stroke when pressing drug columns, and improves the consistency of drug column forming. The device can also press drug columns unidirectionally, thus expanding the pressing range of drug columns.

Description

Technical fields:

[0001] This invention relates to the field of ammunition warhead charge preparation, and more particularly to a charge pressing and demolding device for a five-beam four-column hydraulic press. Background technology:

[0002] Warhead loading refers to the process of processing explosives into propellant grains of a specific shape, strength, and density, and then pressing them into the warhead. Because pressed propellant grains have high density and high yield, the pressing method is widely used in China. Pressing methods are divided into unidirectional and bidirectional pressing, and the commonly used pressing equipment is a hydraulic press. Hydraulic presses are mainly divided into unidirectional and bidirectional presses. For propellant grains with a large length-to-diameter ratio, bidirectional pressing can reduce the axial density difference of the propellant grain, increase the overall density of the propellant grain, and improve its yield. Five-beam four-column hydraulic presses are convenient to operate, highly efficient, and facilitate automation of propellant grain pressing, so they are often used for propellant grain pressing.

[0003] like Figure 1 As shown, the existing pressing and demolding device of the five-beam four-column hydraulic press has the following shortcomings: 1. When pressing the medicated powder with a convergence angle, the forming position of the small end in the mold body is fixed. Therefore, the height of the lower slide positioning column assembly 2 needs to be adjusted multiple times (because there is a gap between the lower slide moving positioning column and the lower plane of the fixed beam, the height of the adjusting column can only be roughly calculated first). Moreover, replacing the adjusting column 1 in the lower slide positioning column assembly 2 requires entering the press cellar, which poses certain safety hazards.

[0004] 2. Due to the large distance between the sliding block positioning post assembly 2 and the pressing mold assembly 3, the fixed beam 4 will undergo a small amount of elastic deformation during the pressing of the drug cartridge. This will cause a slight change in the forming position of the small end a of the drug cartridge within the mold body 5. The small end of the drug cartridge may vary slightly between different batches (e.g., bending the fixed beam 4 downward will result in a smaller straight segment at the small end of the drug cartridge; bending the fixed beam 4 upward will result in the small end of the drug cartridge becoming thicker, while the height of the drug cartridge will become shorter), which will have a certain impact on the performance of the drug cartridge.

[0005] 3. The medicament column cannot be pressed in one direction, otherwise the fixed beam may be damaged; 4. The upper and lower slider positioning column assemblies 2 and 6 on the fixed beam 4 affect the handling of the mold and other issues. Summary of the Invention:

[0006] The present invention aims to overcome the shortcomings of the prior art by providing a device for pressing and demolding the propellant charge in a five-beam four-column hydraulic press.

[0007] This application provides the following technical solution:

[0008] A drug cartridge pressing and demolding device for a five-beam four-column hydraulic press includes a hydraulic press body, a drug cartridge mold body on the hydraulic press body, a lower punch, a drug cartridge, and an upper punch arranged sequentially from bottom to top within the drug cartridge mold body, and a movable demolding component assembly corresponding to and cooperating with the drug cartridge mold body on the upper slide of the hydraulic press body. The device is characterized by: a mold base connected to the drug cartridge mold body on the fixed beam of the hydraulic press body; a lower mold base on the lower slide of the hydraulic press body; a lower mold groove corresponding to and cooperating with the lower punch on the lower mold base; a height adjusting washer connected to the lower mold groove; and a drug ejector assembly corresponding to and cooperating with the lower mold groove movably mounted on the fixed beam.

[0009] Based on the above technical solutions, the following further technical solutions are also possible:

[0010] The ejector assembly includes a pair of slide rails connected to the bottom of a fixed beam, a movable trolley mounted on the slide rails, a through hole corresponding to the lower mold groove on the trolley plate, a set of wing bases on the trolley plate, a support wing hinged to each wing base, an overlapping platform at one end of the support wing, an ejector that overlaps with the overlapping platform, push rods distributed at the top of the ejector corresponding to the upper punch, and conical platforms extending from the bottom of the ejector corresponding to the lower mold groove.

[0011] The aforementioned mold release component includes a pair of second slide rails on the upper slide block, a slide block connected to the second slide rails (6a) via pulleys, a pressure plate on the slide block corresponding to the center hole of the medicine column mold body to be fitted, a pair of release plates on the slide block corresponding to the upper end face of the medicine column mold body, and a telescopic cylinder on the upper slide block that is connected and fitted to the slide block.

[0012] The diameter of the through hole is larger than the diameter of the lower mold base.

[0013] Advantages of the invention:

[0014] This invention features a simple structure and is easy to use, reducing the number of times the mold pads need adjustment. It also facilitates adjustment of the pressing stroke during pill compression, resulting in better consistency in pill formation. Furthermore, the device can compress pills unidirectionally, expanding the compression range. In particular, the bidirectional pressing avoids damage to the fixed beam and eliminates the need for upper and lower slider positioning column assemblies in existing technologies, making the handling of the pill mold and the formed pills much more convenient. Attached image description:

[0015] Figure 1 This is a schematic diagram of the structure of a five-beam four-column hydraulic press when pressing pharmaceutical columns in the prior art;

[0016] Figure 2 This is a schematic diagram of the structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the pharmaceutical column before compression in this invention;

[0018] Figure 4 This is a schematic diagram of the end of the compression of the pharmaceutical column in this invention;

[0019] Figure 5 This is a schematic diagram of the preparation for mold removal according to the present invention;

[0020] Figure 6 This is a schematic diagram after the mold removal process of the present invention;

[0021] Figure 7 yes Figure 2 Enlarged view of direction A in the image;

[0022] Figure 8 yes Figure 6 Enlarged view in direction B;

[0023] Figure 9 This is a schematic diagram of the structure of the depressurization mold assembly in this invention;

[0024] Figure 10 yes Figure 5 A schematic diagram of the structure of the mobile trolley's platform and the medicine dispensing device. Detailed implementation method:

[0025] For easy viewing in Figure 3-6 The slide rail 11a and the wheels of the trolley 11b in the dispensing device assembly 11, as well as the telescopic cylinder that pulls the trolley, are not shown.

[0026] like Figure 2-10 As shown, a medicated powder pressing and demolding device for a five-beam four-column hydraulic press includes a hydraulic press body 1, which includes an upper beam 1a, a fixed beam 10 and a lower beam 1b arranged sequentially. The fixed beam 10 is fixedly connected to the middle of a set of columns 1c.

[0027] An upper slider 5 is installed on the column 1c between the fixed beam 10 and the upper beam 1a, and a lower slider 2 is installed on the column 1c between the lower beam 1b and the fixed beam 10. Upper and lower hydraulic presses (not shown) are installed on both the upper beam 1a and the lower beam 1b, respectively, and are connected to the upper slider 5 and the lower slider 2, thereby driving the upper slider 5 and the lower slider 2 to move up and down along the column 1c.

[0028] A mold base 3 is connected to the countersunk mounting hole 10a of the fixed beam 10. A medicine column mold body 4 is fixedly connected to the mold base 3 by a pressure plate 3a. A central hole 3b is provided on the mold base 3, which communicates with the mounting hole 10a and the inner mold cavity of the medicine column mold body 4.

[0029] Inside the inner cavity of the pharmacopoeia mold 4, a lower punch 4c, a pharmacopoeia 4b, and an upper punch 4a are placed sequentially from bottom to top. The lower end of the punch 4c extends into the mounting hole 10a. A lower die base 1d is connected to the lower slide block 2, and a lower die groove 8 is connected to the lower die base 1d. The lower die groove 8, lower punch 4c, mounting hole 10a, center hole 3b, pharmacopoeia mold 4, and upper punch 4a are coaxially distributed.

[0030] A lower die base 1d is connected to the lower slide block 2, and a lower die groove 8 is connected to the lower die base 1d. The lower die groove 8 is coaxially distributed with the punch rod of the lower punch 4c. When the lower slide block 2 rises, the punch rod of the lower punch 4c inserts into the lower die groove 8, and the lower punch 4c presses the medicine column 4b upward under the push of the lower die groove 8. A height adjustment shim 9 is connected to the groove opening of the lower die groove 8. When processing different models of products, by connecting height adjustment shims 9 of different heights to the groove opening of the lower die groove 8, the forming position of the medicine column is controlled when pressing the medicine column.

[0031] A movable pressing and unpressing die assembly 6, corresponding to and cooperating with the pharmacopoeia mold body 4, is connected to the upper slider 5. The unpressing die assembly 6 includes a second slide rail 6a made of channel steel, which is horizontally distributed. A movable component consisting of a slider 6c and a set of pulleys 6b is provided on the second slide rail 6a. A cylinder 6f, which connects and cooperates with this movable component, is connected to the upper slider 5. The cylinder's output rod extends and retracts, driving the movable component to move along the second slide rail 6a. A pressing plate 6d, corresponding to the center hole of the pharmacopoeia mold body 4, is connected to the lower surface of the slider 6c on one side of the pressing plate 6d. A pair of unpressing plates 6e are connected to the lower surface of the slider 6c on one side of the pressing plate 6d, with the lower end faces of the unpressing plates 6e corresponding to the end faces of the pharmacopoeia mold body 4 on both sides of the upper punch 4a.

[0032] A dispensing device assembly 11, corresponding to and cooperating with the lower mold groove 8, is provided on the lower surface of the fixed beam 10. Two pairs of lifting rods 11h are connected to the lower surface of the fixed beam 10 in the dispensing device assembly 11. A slide rail 11a is connected to the lower end of each pair of lifting rods 11h, and the two slide rails 11a are distributed in parallel. A movable trolley 11b is mounted on the two slide rails 11a. A through hole 11c, corresponding to and cooperating with the lower mold groove 8, is provided on the trolley plate of the trolley 11b. The diameter of the through hole 11c is larger than the diameter of the upper end of the lower mold base 1d, so that the upper end of the lower mold base 1d can pass through the through hole 11c.

[0033] Four wing bases 11d are evenly distributed on the outer side of the through hole 11c on the vehicle plate. A supporting wing 1e is hinged to each wing base 11d, and an arc-shaped overlapping platform 1f is provided at one end of the supporting wing 1e. A discharge device 1g is provided. At the top of the discharge device 1g, there are push rods 1h corresponding to the upper punch 4a. At the bottom of the discharge device 1g, a conical platform 1t extends downward and corresponds to the lower die groove 8. A ring platform 1k extends outward from the outer edge of the discharge device 1g below the push rods 1h and overlaps with the overlapping platform 1f. The discharge device 1g, push rods 1h, conical platform 1t, and ring platform 1k are all integrally machined.

[0034] A telescopic cylinder (not shown in the figure) is connected to the lower surface of the fixed beam 10. The end of the output rod of the telescopic cylinder is connected to the platform of the moving trolley 11b. The telescopic cylinder extends and retracts, driving the moving trolley 11b along the slide rail 11a. The output rod of the telescopic cylinder and the lower mold base 1d are mutually offset.

[0035] Work process:

[0036] Before pressing the drug cartridge: First, place the lower punch 4c, the drug cartridge 4b ​​to be pressed, and the upper punch 4a into the inner mold cavity of the drug cartridge mold body 4 in sequence. Then, start the cylinder to pull the pressing mold assembly 6 to the pressing position. At this time, the lower end of the pressing platen 6d corresponds to the upper punch 4a.

[0037] During the pressing of the drug cartridge: Start the hydraulic press, which drives the upper slide block 5 to press down and the lower slide block 2 to push up. At this time, the pressing platen 6d presses down on the upper punch 4a, and the lower mold groove 8 pushes up the lower punch 4c, squeezing the drug cartridge 4b ​​from both the top and bottom directions. This causes the drug cartridge 4b ​​to be squeezed and formed in the inner mold cavity of the drug cartridge mold body 4. After the set holding time is reached, the upper slide block moves up, causing the pressing platen 6d in the demolding component assembly 6 to separate from the upper punch 4a by a small distance. At the same time, the lower slide block 2 resets.

[0038] Demolding preparation: The cylinder is activated to move the pressure plate 6d away from the top of the upper punch, causing the lower end face of the demolding plate 6e to move above the end faces of the pyrotechnic die body 4 on both sides of the upper punch 4a. At the same time, the telescopic cylinder is activated to pull the moving trolley 11b into place, making the through hole 11c coaxial with the center hole 3b.

[0039] During demolding: The hydraulic press is started, causing the demolding platen 6e to press against the upper surface of the pill mold body 4. Then, the lower mold groove 8 pushes the pill ejector 1g from bottom to top. The ejector rod 1h of the pill ejector 1g pushes the punch rod of the lower punch 4c to eject the formed pill 4b out of the pill mold body 4. At this time, one end of the support wing 1e is flipped up by the action of the upper end of the lower mold base 1d and rests on the outer wall of the upper end of the lower mold base 1d.

[0040] After the mold is removed: the upper slide block 5 returns to its original position, then the upper punch is moved away to remove the molten metal.

Claims

1. A drug cartridge pressing and demolding device for a five-beam four-column hydraulic press, comprising a hydraulic press body (1), a drug cartridge mold body (4) provided on the hydraulic press body (1), a lower punch (4c), a drug cartridge (4b) and an upper punch (4a) arranged sequentially from bottom to top inside the drug cartridge mold body (4), and a movable pressing and demolding component assembly (6) corresponding to and cooperating with the drug cartridge mold body (4) provided on the upper slide block (5) of the hydraulic press body (1), characterized in that: A mold base (3) is provided on the fixed beam (10) of the hydraulic press body (1) to cooperate with the drug cartridge mold body (4). A lower mold base (1d) is provided on the lower slide block (2) of the hydraulic press body (1). A lower mold groove (8) corresponding to the lower punch (4c) is provided on the lower mold base (1d). A height adjustment pad (9) is connected to the lower mold groove (8). A drug ejector assembly (11) corresponding to the lower mold groove (8) is movably set on the fixed beam (10). The drug ejector assembly (11) includes a pair of slide rails (11a) connected to the bottom of the fixed beam (10). A movable trolley (11b) is mounted on the pair of slide rails (11a). A through hole (11c) corresponding to the lower mold groove (8) is provided on the trolley plate (11b). A set of wing bases (11d) is provided on the trolley plate (11b). Each wing base (11d) has The upper hinge has a support wing (1e), and an overlap platform (1f) is provided at one end of the support wing (1e). A drug ejector (1g) is provided to form an overlap corresponding to the overlap platform (1f). A push rod (1h) is provided at the top of the drug ejector (1g) to correspond to the upper punch (4a). A conical platform (1t) extends from the bottom of the drug ejector (1g) to correspond to the lower mold groove (8). The ejector assembly (6) includes a pair of second slide rails (6a) on the upper slide block (5). A slider (6c) is connected to the second slide rails (6a) by a pulley (6b). A pressure plate (6d) is provided on the slider (6c) to correspond to the center hole of the drug column mold body (4) to be fitted. A pair of ejector plates (6e) are also provided on the slider (6c) to correspond to the upper end face of the drug column mold body (4). A telescopic cylinder (6f) is provided on the upper slide block (5) to connect and cooperate with the slider (6c).

2. The grain pressing and ejection device of a five-beam four-column oil hydraulic press according to claim 1, characterized in that: The diameter of the through hole (11c) is larger than the diameter of the lower mold base (1d).

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