Starting cartridge

Abstract

The utility model discloses a starting cartridge, which relates to the technical field of firework equipment and comprises a cartridge case, primer composition is filled at the bottom of the cartridge case, the top of the cartridge case shrinks and gathers towards the axial direction of the cartridge case to form an extrusion opening, a sealing element and a smoke agent which wrap the extrusion opening are arranged at the top of the cartridge case, and the smoke agent is filled in the cartridge case. The top of the cartridge case is extruded and gathered to form the extrusion opening, and the extrusion opening is wrapped by the sealing piece, so that the cartridge case is completely sealed, the sealing requirement for a smoke agent in the cartridge case is met, and the shelf life of the starting cartridge is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pyrotechnic equipment, and more particularly to a starting bullet. Background Art

[0002] Starting bombs are mainly used to start in sports competitions. They are usually filled with gunpowder and a small amount of metal powder. When the starting bomb is ignited, it will make a loud explosion and produce a small amount of smoke so that athletes and referees can clearly hear and see the starting signal.

[0003] The current starting bullet has a sealing gasket 5 installed inside the cartridge case 1 to seal and seal the smoke agent 2 inside the cartridge case 1. However, since the diameter of the sealing gasket 5 is 0.5 mm smaller than the inner diameter of the cartridge case 1, the sealing gasket 5 can only be pressed into the cartridge case 1 by manual plate stamping, and cannot be continuously processed by equipment, so the production efficiency is low. In addition, since the sealing gasket 5 is placed inside the cartridge case 1, the mouth end of the cartridge case 1 cannot be closed, and the gap at the mouth end is more than 4 mm. This can only ensure that the smoke agent 2 does not scatter outside the cartridge case 1, but cannot ensure that the smoke agent 2 is not damp.

[0004] In summary, how to provide a starting bullet that can be completely sealed to prevent the smoke agent 2 from getting wet is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a starting bullet that can be completely sealed to prevent the internal smoke agent 2 from getting wet, thereby increasing the shelf life of the starting bullet.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] A starting bullet, comprising:

[0008] A cartridge case, wherein the bottom of the cartridge case is filled with firing powder, the top of the cartridge case is contracted and gathered toward the axis of the cartridge case to form an extrusion opening, and a sealing member is provided on the top of the cartridge case to cover the extrusion opening;

[0009] A smoke agent fills the interior of the cartridge case and contacts the firing charge.

[0010] Furthermore, the present invention adopts a solidifiable firing powder as the firing powder.

[0011] Furthermore, in the present invention, an annular groove is provided at the bottom of the cartridge case, and the firing charge is located in the annular groove.

[0012] The present invention is further characterized in that the diameter of the extrusion port is less than 0.2 mm.

[0013] Further, in the present utility model, the filling height of the smoke agent is lower than the starting position where the top of the cartridge case shrinks and converges.

[0014] Further, in the present utility model, the sealing member is made of a solidifiable solution material.

[0015] Further, in the present utility model, the sealing member is made of a glue-like material.

[0016] Further, in the present utility model, the sealing member is a quick-drying sealant.

[0017] Further, in the present utility model, after the sealing member is placed on the top of the cartridge case, it is quickly solidified by blue light irradiation.

[0018] For the blank cartridge provided by the present utility model, during use, the percussion composition is filled at the bottommost part of the cartridge case, then the smoke agent is filled inside the cartridge case and contacts the percussion composition. After that, the top of the cartridge case is shrunk and converged towards the axis direction of the cartridge case to form a squeezing opening. The top of the cartridge case is provided with a sealing member that covers the squeezing opening. That is to say, the top of the cartridge case is squeezed and converged towards the central position through a mold, and finally a squeezing opening is formed at the topmost part. At this time, the diameter of the squeezing opening is very small, and it is covered by the sealing member, which completely seals the cartridge case and meets the sealing requirements for the smoke agent inside the cartridge case, greatly improving the shelf life of the blank cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0020] Figure 1 It is a schematic diagram of the design solution in the prior art;

[0021] Figure 2 It is a specific structural schematic diagram of the blank cartridge provided by the present utility model;

[0022] Figure 1 - Figure 2 Among them, the reference numerals include:

[0023] 1. Cartridge case; 2. Smoke agent; 3. Percussion composition; 4. Sealing member; 5. Sealing gasket; 6. Annular groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] The core of the present utility model is to provide a starting cartridge, which can achieve complete sealing, avoid the internal smoke agent 2 from getting damp, and improve the shelf life of the starting cartridge.

[0026] Please refer to Figure 2 , a starting cartridge, including a cartridge case 1 and a smoke agent 2. The bottom of the cartridge case 1 is filled with a percussion cap 3. The top of the cartridge case 1 shrinks and converges towards the axis of the cartridge case 1 to form a squeezing opening. A sealing member 4 covering the squeezing opening is provided at the top of the cartridge case 1. The smoke agent 2 is filled inside the cartridge case 1 and contacts the percussion cap 3.

[0027] It should be noted that in the embodiments of the present utility model, a special mold is used for the shrinkage and convergence of the top of the cartridge case 1. The general mold is an external fancy core-removing punch. Through the counterpunching of the mold and the cartridge case 1, the shrinkage and convergence of the top of the cartridge case 1 are realized to form a squeezing opening. At the same time, the diameter of the finally formed squeezing opening is less than 0.2 mm, reducing the difficulty of further sealing the squeezing opening by the sealing member 4.

[0028] In addition, the specific structure of the above-mentioned external fancy core-removing punch includes a punch rod and a punch head. The punch head is fixedly connected to the punch rod. The punch head is provided with a groove, and a number of protrusions are arranged in an array along the axis of the punch rod inside the groove. The protrusions adopt a wedge-shaped structure.

[0029] Optionally, in some embodiments, the sealing member 4 can be a sealing sleeve made of rubber material, and it is sleeved on the top end of the cartridge case 1 to close the squeezing opening.

[0030] In other embodiments, the sealing member 4 adopts a curable solution material, such as wax and glue materials, both of which have curability, or a melted metal solution. The cooling and solidification characteristics can also be used to seal the top of the cartridge case 1. By dripping on the top of the cartridge case 1 in a liquid state, it can ensure complete coverage of the squeezing opening and can adapt to the shape after the top of the cartridge case 1 converges. After it solidifies, the complete sealing of the cartridge case 1 is achieved.

[0031] During use, the firing charge 3 is filled at the bottom of the cartridge case 1, and then the smoke agent 2 is filled into the interior of the cartridge case 1 and contacts the firing charge 3. Thereafter, the top of the cartridge case 1 is shrunk and gathered toward the axis of the cartridge case 1 to form an extrusion port. A sealing member 4 covering the extrusion port is provided on the top of the cartridge case 1. That is to say, the top of the cartridge case 1 is squeezed and gathered toward the center position through a mold, and finally an extrusion port is formed at the top. At this time, the diameter of the extrusion port is very small, and it is covered by the sealing member 4, which completely closes the cartridge case 1, meets the sealing requirements for the smoke agent 2 inside the cartridge case 1, and greatly improves the shelf life of the starting bullet.

[0032] Optionally, in order to avoid the situation where the firing bullet fails due to the change in the position of the firing charge 3, in some embodiments, the firing charge 3 adopts a solidifiable firing charge 3. Specifically, the firing charge 3 is initially in liquid state and is added with solidifying glue. Therefore, when the firing charge 3 enters the bottom of the cartridge case 1, it will automatically solidify, and the grip between the solidifying glue and the inner wall of the cartridge case 1 is used to achieve the purpose of fixing the position of the firing charge 3.

[0033] Optionally, in order to improve the firmness of the position fixation of the firing charge 3, in some embodiments, an annular groove 6 is provided at the bottom of the cartridge case 1, and the firing charge 3 is located in the annular groove 6. That is to say, by expanding the annular groove 6 with a diameter larger than the diameter of the cartridge case 1 at the bottom of the cartridge case 1, when the firing charge 3 solidifies inside the annular groove 6, the position of the firing charge 3 can be fixed with greater firmness.

[0034] In other embodiments, a pin punch may be used on the side wall of the cartridge case 1 near the bottom to punch out a number of fixing protrusions on the side wall of the cartridge case 1 , and the propellant 3 will cover the several fixing protrusions. After solidification, the fixing protrusions have the effect of fixing the propellant 3 .

[0035] In other embodiments, a number of positioning rods can be installed at the bottom of the cartridge case 1 by welding or other means, and the positioning rods are fixedly connected to the bottom of the cartridge case 1 or the side wall of the cartridge case 1, and the propellant 3 is submerged in the positioning rods. Therefore, when the propellant 3 is solidified, the purpose of fixing the position of the propellant 3 is achieved.

[0036] Optionally, in order to avoid the smoke agent 2 from overflowing when the top of the cartridge case 1 is squeezed, the filling height of the smoke agent 2 is limited. In some embodiments, the filling height of the smoke agent 2 is lower than the starting position of the shrinkage and gathering of the top of the cartridge case 1, thereby avoiding the smoke agent 2 from overflowing when the top of the cartridge case 1 is folded.

[0037] In the above embodiments, in order to further reduce the possibility of the smoke agent 2 overflowing, after filling the smoke agent 2, a rubber sheet can be placed above the smoke agent 2. The rubber sheet can position the smoke agent 2 and further avoid the overflow of the smoke agent 2 when gathering the top of the cartridge case 1.

[0038] Optionally, in order to improve the sealing effect of the extrusion opening, the seal 4 is made of a glue-like material. Specifically, the seal 4 is made of a quick-drying sealant. After the top of the cartridge case 1 is gathered, a drop of quick-drying sealant is dripped on the top of the cartridge case 1 and is quickly dried by blue light irradiation, achieving solidification within 3 seconds, thereby completely sealing the cartridge case 1, completely avoiding the moisture absorption of the smoke agent 2, greatly improving the service life of the blank cartridge, and having a low production cost at the same time.

[0039] Specifically, the production process of this blank cartridge is as follows: The cartridge case 1 enters the rotating disk through the vibrating funnel. At the first station, it is detected whether there is primer 3 in the cartridge case 1, and the cartridge case 1 without primer 3 is removed; at the second station, the smoke agent 2 is added; at the third station, it is detected whether the smoke agent 2 is added in place, and the cartridge case 1 without or lacking the smoke agent 2 is removed; at the fourth station, an external fancy core collecting punch is used to gather the mouth end of the cartridge case 1 from top to bottom; at the fifth station, it is detected whether the cartridge case 1 after core collecting is damaged, and the damaged ones are removed; at the sixth station, a drop of quick-drying sealant is dripped at the mouth end of the cartridge case 1; at the seventh station, the sealant is irradiated with blue light to ensure that it dries within 3 seconds.

[0040] That is to say, the key point of the embodiment of the present utility model is: The primer 3 is filled at the bottom of the cartridge case 1, then the smoke agent 2 is filled inside the cartridge case 1 and contacts the primer 3. After that, the top of the cartridge case 1 is shrunk and gathered towards the axis direction of the cartridge case 1 to form an extrusion opening. A seal 4 covering the extrusion opening is provided at the top of the cartridge case 1. That is to say, the top of the cartridge case 1 is squeezed and gathered towards the center position through a mold, and finally an extrusion opening is formed at the top. At this time, the diameter of the extrusion opening is very small, and it is completely covered by the seal 4, that is, the cartridge case 1 is completely sealed, meeting the sealing requirements for the smoke agent 2 inside the cartridge case 1, and greatly improving the shelf life of the blank cartridge.

[0041] In this specification, the various embodiments are described in a progressive manner. The key point of each embodiment is the difference from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0042] The above has introduced in detail a starting pistol provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A starting pistol, characterized in that, Comprising: A cartridge case (1), the bottom of the cartridge case (1) being filled with percussion primer (3), the top of the cartridge case (1) being contracted and converged towards the axis of the cartridge case (1) to form a squeezing opening, and a seal (4) covering the squeezing opening being provided at the top of the cartridge case (1); A smoke agent (2), the smoke agent (2) filling the interior of the cartridge case (1) and being in contact with the percussion primer (3).

2. A starting pistol according to claim 1, characterized in that, The percussion primer (3) is a curable percussion primer.

3. A starting pistol according to claim 2, characterized in that, An annular groove (6) is provided at the bottom of the cartridge case (1), and the percussion primer (3) is located in the annular groove (6).

4. The starting pistol according to claim 3, characterized in that, The diameter of the squeezing opening is less than 0.2 mm.

5. A starting pistol according to claim 4, characterized in that, The filling height of the smoke agent (2) is lower than the starting position of the contraction and convergence at the top of the cartridge case (1).

6. A starting pistol according to any one of claims 1-5, characterized in that, The seal (4) is made of a curable solution material.

7. A starting pistol according to claim 6, characterized in that, The seal (4) is made of a glue-like material.

8. A starting pistol according to claim 7, characterized in that, The seal (4) is a quick-drying sealant.

9. A starting pistol according to claim 8, characterized in that, After the seal (4) is placed on the top of the cartridge case (1), it is rapidly cured by blue light irradiation.

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