Explosive lens forming mold

Abstract

The utility model relates to an explosive lens forming die which comprises a shaping cover, a single-hole funnel and an annular hole funnel, the shaping cover is a hollow circular truncated cone body, the interior of the shaping cover is divided into a first cavity and a second cavity by a cone-shaped partition plate, the top of the first cavity is provided with a circular filling port, and the top of the second cavity is provided with an annular filling port; the bottom of the single-hole funnel extends downwards to form a material leaking nozzle, and the material leaking nozzle can be connected with the circular filling port in an inserting manner; a plug is arranged in the center of the bottom of the annular hole funnel and connected with the inner wall of the annular hole funnel through a connecting rib, a plurality of fan-shaped material leakage holes are formed in the periphery of the plug, the plug corresponds to the circular filling port, and the fan-shaped material leakage holes correspond to the annular filling port. The explosive lens forming device is suitable for explosives with certain fluidity and plasticity, can be manufactured on a large scale through 3D printing, has the advantage of being low in manufacturing cost, reduces man-machine procedures in the explosive lens forming process, reduces process complexity, and improves safety in the manufacturing process.

Description

Technical Field

[0001] The utility model relates to the technical field of explosive detonation testing, in particular to an explosive lens forming mould. Background Art

[0002] Explosive lens is a commonly used planar detonation wave loading device in the field of shock wave physics and explosion mechanics research. Explosive lens is usually a combined charge structure of two types of explosives with high and low detonation velocities. By adjusting the shape of the charge, the point detonation effect of the detonator can be converted into a planar shock wave of the charge to achieve the flatness of the detonation wave loading. At present, the more mature combined explosive lens is pressed and formed by metal molds. The key to its pressing process is to accurately control the molding shape of high and low detonation velocity explosives, and at the same time require the charge to exceed the critical thickness of detonation to ensure a steady-state detonation reaction. The pressing process of the combined explosive lens has the disadvantages of great molding difficulty and high process risk, and the manufacturing cost and process complexity are relatively high. Utility Model Content

[0003] The utility model aims to provide an explosive lens forming mold, comprising a shaping cover, a single-hole funnel and a ring-hole funnel, which is suitable for casting-curing forming explosives or liquid explosives, can simplify the explosive lens forming process, improve the process safety factor in the manufacturing process, and reduce the manufacturing cost of the explosive lens.

[0004] The purpose of the utility model is achieved through the following technical solutions: a explosive lens forming mold, comprising a shaping cover, a single-hole funnel and an annular hole funnel, the shaping cover is a hollow truncated cone, the interior of the shaping cover is provided with a conical cylindrical partition, the conical cylindrical partition divides the interior of the shaping cover into a first cavity and a second cavity, the top of the first cavity is provided with a circular filling port, the top of the second cavity is provided with an annular filling port; a leakage nozzle extends downward from the bottom of the single-hole funnel, the leakage nozzle can be plug-connected with the circular filling port; a plug is provided at the bottom center of the annular hole funnel, the plug is connected to the inner wall of the annular hole funnel through connecting ribs, a plurality of fan-shaped leakage holes are provided around the plug, the plug is arranged corresponding to the circular filling port, and the fan-shaped leakage holes are arranged corresponding to the annular filling port.

[0005] In a preferred embodiment, the second cavity is located outside the first cavity, the first cavity is in a truncated cone shape, and the second cavity is in a conical cylinder shape.

[0006] In a preferred embodiment, the bottom diameter of the shaping cover is 100 mm, the height is 68.2 mm, and the angle between the side wall and the central axis is 68 degrees.

[0007] In a preferred embodiment, the shaping cover, the single-hole funnel and the annular hole funnel are all formed by PETG polymer material through 3D printing, and the shaping cover is light-transmissive.

[0008] In a preferred embodiment, the thickness of the conical cylindrical partition is not greater than 0.5 mm.

[0009] In a preferred embodiment, a columnar connection seat is provided on the top of the shaping cover, and the circular filling port and the annular filling port are arranged on the columnar connection seat.

[0010] In a preferred embodiment, a slot is provided at the bottom of the annular funnel, and the columnar connecting seat of the shaping cover can be plug-connected to the slot.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. The mold of the utility model is suitable for mixed explosives with certain fluidity and plasticity. It does not require a pressing molding process, reduces the man-machine process in the manufacturing process of the explosive lens, reduces the process complexity, and improves the safety of the manufacturing process.

[0013] 2. When the mold of the utility model is used to manufacture explosive lenses, since the slurry has good fluidity, the shape and size of the charge can be precisely controlled through spontaneous leveling and solidification after the slurry is added to the mold.

[0014] 3. Compared with the metal mold used for pressing and molding the combined explosive lens, the mold of the utility model has the advantages of lower manufacturing cost and mass production. At the same time, the use of 3D printing technology can ensure the processing accuracy of the thickness of the internal structure partition, solving the problem of traditional mechanical processing that is difficult to solve the processing difficulty of devices with complex internal structures.

[0015] 4. The shaping cover in the utility model has a certain light transmittance, which is convenient for the manufacturer to inspect the charge quality during the manufacturing process of the explosive lens, and also convenient for the user to observe the development, growth and propagation of the detonation wave in the explosive lens during the detonation test.

[0016] 5. The mold of the utility model is mainly used for the preparation and molding of plane wave loaded charge in explosive detonation test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the shaping cover in the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the single-hole funnel in the utility model;

[0019] Figure 3This is a schematic diagram of the structure of the annular hole funnel in the utility model;

[0020] Figure 4 It is a schematic diagram of the assembly of the shaping cover and the single-hole funnel in the utility model;

[0021] Figure 5 It is a schematic diagram of the assembly of the shaping cover and the annular hole funnel in the utility model. DETAILED DESCRIPTION

[0022] The following detailed description of the embodiments of the present invention is further described in detail in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the preferred embodiments described, and the scope of the present invention is defined by the claims.

[0023] In the description of the present invention, it should be noted that, unless otherwise specified, “plurality” means two or more; the terms “first”, “second”, etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0024] Embodiment 1

[0025] See also Figures 1 to 3 The present embodiment provides an explosive lens forming mold, comprising a shaping cover 1, a single-hole funnel 2 and an annular hole funnel 3. The shaping cover 1 is a hollow truncated cone, and a conical cylindrical partition 11 is arranged inside the shaping cover. The conical cylindrical partition 11 divides the interior of the shaping cover into a first cavity 12 and a second cavity 13. A circular filling port 14 is arranged at the top of the first cavity 12, and an annular filling port 15 is arranged at the top of the second cavity 13; a leakage nozzle 21 extends downward from the bottom of the single-hole funnel 2, and the leakage nozzle 21 can be plugged and connected with the circular filling port 14; a plug 31 is arranged at the bottom center of the annular hole funnel 3, and the plug 31 is connected to the inner wall of the annular hole funnel through a connecting rib 32. A plurality of fan-shaped leakage holes 33 are arranged around the plug 31, and the plug 31 is arranged corresponding to the circular filling port 14, and the fan-shaped leakage holes 33 are arranged corresponding to the annular filling port 15.

[0026] See also Figure 1In this embodiment, the shaping cover 1 is a double-layer structure, and the outer layer of the shaping cover 1 is composed of a circular bottom plate 16 and a large conical cylindrical side wall 17. The inner layer of the shaping cover 1 is a conical cylindrical partition 11 on the circular bottom plate 16, and the conical cylindrical partition 11 is coaxially arranged with the large conical cylindrical side wall 17. The inner side of the conical cylindrical partition 11 is the first cavity 12, and the outer side of the conical cylindrical partition 11 is the second cavity 13. The second cavity 13 is located on the outer side of the first cavity 12. The first cavity 12 is truncated cone-shaped, and the second cavity 13 is conical. The circular filling port 14 and the annular filling port 15 are flush. Low-explosion velocity explosive slurry is added to the first cavity 12 through the circular filling port 14, and high-explosion velocity explosive slurry is added to the second cavity 13 through the annular filling port 15. Low-explosion velocity explosive and high-explosion velocity explosive are relative.

[0027] In this embodiment, the bottom diameter of the shaping cover 1 is 100 mm, the height is 68.2 mm, and the angle between the large conical cylindrical side wall 17 and the central axis is 68 degrees.

[0028] See also Figure 2 In this embodiment, a leakage nozzle 21 extends from the bottom of the single-hole funnel 2, and a circular leakage hole is arranged at the center of the leakage nozzle 21, which is connected to the inner cavity of the single-hole funnel 2. The outer diameter of the leakage nozzle 21 is adapted to the inner diameter of the circular filling port 14.

[0029] See also Figure 3 In this embodiment, a leakage port is provided at the bottom of the annular hole funnel 3, and a plug 31 is provided at the center of the leakage port. The plug is cylindrical, and the cylindrical surface of the plug 31 is connected to the inner wall of the leakage port through a plurality of connecting ribs 32. The connecting ribs are arranged along the radial direction of the annular hole funnel to divide the leakage port into a plurality of fan-shaped leakage holes 33. The end face size of the plug 31 can ensure that the circular filling port 14 is completely covered.

[0030] In this embodiment, the shaping cover 1, the single-hole funnel 2 and the annular hole funnel 3 are all integrally formed by PETG polymer material through 3D printing. The shaping cover 1 has a certain light transmittance, which is convenient for observing the internal charge quality and the detonation wave generation process in the test through the mold. 3D printing technology belongs to the scope of the prior art and will not be described in detail here.

[0031] The mold of the utility model is manufactured by 3D printing technology, has low manufacturing cost, and can be manufactured in large quantities. The cost of 3D printing equipment can be controlled at about 2,000 yuan to 4,000 yuan.

[0032] See also Figure 4 The single-hole funnel 2 is assembled with the shaping cover 1, and the leakage nozzle 21 of the single-hole funnel 2 is inserted into the circular filling port 14 of the shaping cover 1. The low-detonation-velocity explosive slurry is injected into the first cavity 12 of the shaping cover 1 through the leakage nozzle 21, and the first cavity 12 is filled, and the single-hole funnel 2 is removed.

[0033] See also Figure 5 The annular funnel 3 is assembled with the shaping cover 1, and the high-explosive-velocity explosive slurry is injected into the second cavity 13 of the shaping cover 1 through the fan-shaped leakage hole 33, and fills the second cavity 13, and the annular funnel 3 is removed.

[0034] The flow state of the slurry in the mold is observed through the shaping cover 1, and the slurry is placed in a pouring tank for vacuum exhaust, and then the overflow of the circular filling port 14 and the annular filling port 15 of the shaping cover 1 is cleaned, and then part of the slurry is added again. This process is repeated to ensure that the slurry fills the entire shaping cover 1, and finally the shaping cover 1 is placed in an oven to solidify the slurry in the shaping cover 1.

[0035] In this embodiment, the thickness of the conical cylindrical partition 11 is not greater than 0.5 mm.

[0036] In this embodiment, a columnar connection seat 18 is provided on the top of the shaping cover 1 , and the circular filling port 14 and the annular filling port 15 are arranged on the columnar connection seat 18 .

[0037] In this embodiment, a slot 34 is provided at the bottom of the annular hole funnel 3, and the cylindrical connection seat 18 of the shaping cover can be plugged and connected with the slot 34. The annular hole funnel and the shaping cover can also be connected by threads, that is, an internal thread is provided on the inner side wall of the slot 34, and an external thread is provided on the outer cylindrical surface of the cylindrical connection seat 18.

[0038] The use of the mold to form the explosive lens reduces the human-machine process in the manufacturing process, reduces the process complexity, and improves the safety of the manufacturing process.

[0039] When the mold is used to manufacture explosive lenses, the slurry has good fluidity. After the slurry is added to the mold, it can achieve precise control of the shape and size of the charge through spontaneous leveling and solidification.

[0040] Compared with the metal mold used for pressing and molding the combined explosive lens, this mold has the advantages of lower manufacturing cost and mass production. At the same time, the use of 3D printing technology can ensure the processing accuracy of the thickness of the internal structure partition, solving the problem that traditional mechanical processing is difficult to solve the processing difficulty of devices with complex internal structures.

[0041] The mold has a certain light transmittance, which is convenient for the manufacturer to inspect the charge quality during the manufacturing process of the explosive lens, and is also convenient for the user to observe the development, growth and propagation of the detonation wave in the explosive lens during the detonation test.

[0042] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An explosive lens forming mold, characterized in that: The invention comprises a shaping cover (1), a single-hole funnel (2) and an annular hole funnel (3); the shaping cover (1) is a hollow truncated cone; a conical cylindrical partition (11) is provided inside the shaping cover; the conical cylindrical partition (11) divides the inside of the shaping cover into a first cavity (12) and a second cavity (13); a circular filling port (14) is provided at the top of the first cavity (12); and an annular filling port (15) is provided at the top of the second cavity (13); the bottom of the single-hole funnel (2) extends downward; A material leakage nozzle (21) is provided, and the material leakage nozzle (21) can be plugged and connected with the circular filling port (14); a plug (31) is provided at the bottom center of the annular hole funnel (3), and the plug (31) is connected to the inner wall of the annular hole funnel through a connecting rib (32); a plurality of fan-shaped material leakage holes (33) are provided around the plug (31), and the plug (31) is arranged corresponding to the circular filling port (14), and the fan-shaped material leakage holes (33) are arranged corresponding to the annular filling port (15).

2. The explosive lens forming mold according to claim 1, characterized in that: The second cavity (13) is located outside the first cavity (12); the first cavity (12) is in the shape of a truncated cone, and the second cavity (13) is in the shape of a conical cylinder.

3. The explosive lens forming mold according to claim 1, characterized in that: The bottom diameter of the shaping cover (1) is 100 mm, the height is 68.2 mm, and the angle between the side wall and the central axis is 68 degrees.

4. The explosive lens forming mold according to claim 1, characterized in that: The shaping cover (1), the single-hole funnel (2) and the annular hole funnel (3) are all formed by 3D printing of a PETG polymer material, and the shaping cover is light-transmissive.

5. The explosive lens forming mold according to claim 1, characterized in that: The thickness of the conical cylindrical partition (11) is not greater than 0.5 mm.

6. The explosive lens forming mold according to claim 1, characterized in that: A columnar connection seat (18) is provided on the top of the shaping cover (1), and the circular filling port (14) and the annular filling port (15) are arranged on the columnar connection seat (18).

7. The explosive lens forming mold according to claim 6, characterized in that: A slot (34) is provided at the bottom of the annular funnel (3), and the columnar connecting seat (18) of the shaping cover can be plug-connected with the slot (34).

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