A bullet

Abstract

The invention discloses a bullet, and relates to the technical field related to bullets, including a cartridge case, one end of the cartridge case is connected to a bullet head, one end of the cartridge case is connected to a bottom edge, the cartridge case is made of high-strength thermoplastic resin, metal powder and reinforced fiber material through an injection molding process, a connection hole is opened at the tail edge of the cartridge case, and a connecting column is fixedly connected to one side edge of the bottom edge, and the production process of the cartridge case is: A: selecting materials, B: drying materials, C: preheating the mold, D: three-stage injection molding, E: injection pressure holding, F: cooling the mold, G: blowing out cold water, and H: opening the mold to take out the parts. The invention uses high-strength thermoplastic resin, metal powder and reinforced fiber material to make the cartridge case, which is convenient to carry, reduces the heat conducted to the chamber, and is conducive to continuous shooting. The cartridge case is made by injection molding, which is not only simple in process and convenient for mass production, but also has low material cost, thereby reducing production cost.

Description

Technical Field

[0001] The present invention relates to the technical field related to bullets, and in particular to a bullet. Background Art

[0002] A bullet is a weapon fired from a firearm. A bullet is generally composed of a bullet, a body, propellant, and a primer. After firing, the propellant burns to produce high-pressure gas to push the bullet out, and the empty cartridge case and empty primer are ejected from the barrel as the cartridge case.

[0003] The shells of existing bullets are mostly made of metal materials, which have the following disadvantages: the metal shells are heavy and inconvenient to carry, the metal conducts a lot of heat to the chamber, affecting the environment of the chamber and not conducive to continuous shooting, the shell manufacturing process is complicated, the materials are expensive, and the production cost is high.

[0004] Therefore, it is necessary to propose a bullet to solve the above problems. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a bullet that solves the problems of the existing metal cartridge case being heavy and inconvenient to carry, the metal conducting a lot of heat to the chamber which is not conducive to continuous shooting, and the cartridge case manufacturing process being complex, the materials being expensive, and the production cost being high.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A bullet comprises a cartridge case, one end of which is connected to a bullet head, one end of which is connected to a bottom edge, the cartridge case being made of high-strength thermoplastic resin, metal powder and reinforced fiber material by injection molding, the cartridge case comprising a cartridge head, a cartridge shoulder and a cartridge wall, one end of the cartridge head being provided with a cartridge opening, the inner side of the cartridge opening being fixedly connected with a metal ring, the inner side of the cartridge opening being fixedly connected with a metal layer, the middle part of the cartridge case being provided with an ignition hole, the edge of the cartridge case being provided with a connection hole, a side edge of the bottom edge being fixedly connected with a connection column, and the outer side of the middle part of the connection column being fixedly connected with an annular flange.

[0010] Optionally, the connecting hole is matched with the connecting column, and the annular flange is extrusion-connected to the connecting hole.

[0011] Optionally, a detonator is fixedly connected to the middle of the bottom edge, and the bottom edge is made of copper.

[0012] Optionally, the production process of the cartridge case is:

[0013] A: Selected materials: Choose high-strength thermoplastic resin, metal powder, and reinforced fiber materials as injection molding materials;

[0014] B: Drying materials: Place the injection molding materials in a drying oven and dry them at 70℃~90℃ for 1~3h to make the humidity less than 0.05%, and then use the automatic feeding system to continuously feed the materials;

[0015] C: Mold preheating: Install the injection mold on the injection molding machine, preheat the mold before production mold closing, set the preheating temperature to 80-100℃, set the temperature of the moving mold electric heating tube to 65-75℃, and then close the mold;

[0016] D: Three-stage injection molding: The injection molding machine injects into the mold. During injection, the pressure is divided into three injection stages for control. The first-stage screw switching position is adjusted to the point where the plastic melt passes through the runner and just enters 6% to 10% of the cavity by volume. The second-stage screw switching position is adjusted to the point where the plastic melt fills 75% to 85% of the cavity. The third-stage screw switching position is adjusted to the point where the plastic melt fills 98% to 99% of the cavity.

[0017] E: Injection holding pressure: The holding pressure is 70% to 80% of the maximum injection pressure, the speed is lower than the minimum injection pressure of each stage, and the time is maintained for 30s to 40s;

[0018] F: Cooling the mold: Use cooling water with a temperature of 20℃~24℃ to cool the mold, and use fully automatic system control technology to inject cooling water into the mold for cooling;

[0019] G: Blow out cold water: After cooling is completed, the system will blow in air to blow the cooling water in the mold water channel out of the mold;

[0020] H: Open the mold and take out the finished shell.

[0021] Optionally, the ratio of the high-strength thermoplastic resin, the metal powder and the reinforcing fiber is 5:1:1.

[0022] Optionally, the high-strength thermoplastic resin is composed of one or more materials selected from the group consisting of PE-polyethylene, PP-polypropylene, PVC-polyvinyl chloride, PS-polystyrene, and PA-polyamide.

[0023] Optionally, the metal powder is composed of one or more materials selected from the group consisting of copper, tin, manganese and chromium.

[0024] Optionally, the reinforcing fiber is composed of one or more materials selected from the group consisting of aramid fiber, glass fiber, carbon fiber, and boron fiber.

[0025] Optionally, in step D, the first-stage injection pressure is 80% to 90%, the injection speed is 15% to 20%, the second-stage injection pressure is 85% to 95%, the injection speed is 20% to 40%, and the third-stage injection pressure is 80% to 90%, the injection speed is 10% to 20%.

[0026] (III) Beneficial effects

[0027] The present invention provides a bullet having the following beneficial effects:

[0028] 1. The present invention utilizes high-strength thermoplastic resin, metal powder and reinforced fiber material to make the cartridge case, which not only reduces the weight of the bullet and facilitates carrying, but also greatly increases the proportion of composite materials, thereby reducing the heat conducted to the chamber and facilitating continuous shooting.

[0029] 2. The present invention not only facilitates the assembly of bullets through the matching arrangement of the connecting holes, the connecting columns and the annular flange, but also makes the cartridge case and the bottom edge more tightly connected, increases the reliability of the connection between the cartridge case and the bottom edge, and ensures the reliability of the composite material part and the metal part.

[0030] 3. The present invention utilizes injection molding technology to manufacture the cartridge case, which not only has a simple process and is convenient for mass production, but also has low material cost, thereby reducing production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional schematic diagram of the bullet structure of the present invention;

[0032] Figure 2 It is a cross-sectional schematic diagram of the bullet structure of the present invention;

[0033] Figure 3 It is a cross-sectional schematic diagram of the shell structure of the present invention;

[0034] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure at center A;

[0035] Figure 5 It is a process flow chart of the cartridge case structure of the present invention.

[0036] In the figure: 1, cartridge case; 11, case mouth; 12, case head; 13, case shoulder; 14, case wall; 15, connecting hole; 16, ignition hole; 17, metal ring; 18, metal layer; 2, warhead; 3, bottom edge; 31, detonator; 33, connecting column; 34, annular flange. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] According to Figure 1-5 As shown, the present invention provides a technical solution:

[0039] A bullet comprises a cartridge case 1, one end of the cartridge case 1 is connected to a bullet head 2, one end of the cartridge case 1 is connected to a bottom edge 3, the cartridge case 1 is made of high-strength thermoplastic resin, metal powder and reinforced fiber material through an injection molding process, the cartridge case 1 is made of high-strength thermoplastic resin, metal powder and reinforced fiber material, on the one hand, the weight of the bullet is reduced, and it is convenient to carry, on the other hand, the proportion of composite materials is greatly increased, thereby reducing the heat conducted to the chamber, which is conducive to continuous shooting, the cartridge case 1 comprises a shell head 12, a shell shoulder 13 and a shell wall 14, one end of the shell head 12 is provided with a shell opening 11, the inner side of the shell opening 11 is fixedly connected with a metal ring 17, by setting the metal ring 17, a metal layer 18 is fixedly connected to the shell wall 14 of the tail of the cartridge case 1, so that the outer side of the upper section of the cartridge case 1 is plastic, and the inner side is covered with metal, so that the direct contact with the bullet is achieved. The head is made of metal with good elasticity, so that the inner and outer sides of the lower section of the cartridge case 1 are plastic, and metal is wrapped in the middle, which improves the pulling force. A ignition hole 16 is opened in the middle of the tail of the cartridge case 1, and a detonator 31 is fixedly connected to the middle of the bottom edge 3. The bottom edge 3 is made of copper. A connecting hole 15 is opened at the edge of the tail of the cartridge case 1, and a connecting column 33 is fixedly connected to one side edge of the bottom edge 3. An annular flange 34 is fixedly connected to the outer side of the middle of the connecting column 33. The connecting hole 15 is adapted to the connecting column 33, and the annular flange 34 is squeezed and connected to the connecting hole 15. The matching arrangement between the connecting hole 15, the connecting column 33 and the annular flange 34 not only facilitates the assembly of the bullet, but also makes the cartridge case 1 and the bottom edge 3 more tightly, increases the reliability of the connection between the cartridge case 1 and the bottom edge 3, and ensures the reliability of the composite material part and the metal part.

[0040] Embodiment 1:

[0041] The production process of cartridge cases is:

[0042] A: Selected materials: High-strength thermoplastic resin, metal powder, and reinforcing fiber materials are selected as injection molding materials. The ratio of high-strength thermoplastic resin, metal powder, and reinforcing fiber is 5:1:1. The high-strength thermoplastic resin is composed of PE-polyethylene, PP-polypropylene, and PVC-polyvinyl chloride materials. The metal powder is composed of copper, tin, and manganese materials. The reinforcing fiber is composed of aramid fiber and glass fiber materials.

[0043] B: Drying materials: Place the injection molding materials in a drying oven at 70°C for 1 hour to make the humidity less than 0.05%, and then use the automatic feeding system to continuously feed the materials;

[0044] C: Mold preheating: Install the injection mold on the injection molding machine, preheat the mold before production mold closing, set the preheating temperature to 80℃, set the temperature of the moving mold electric heating tube to 65℃, and then close the mold;

[0045] D: Three-stage injection molding: The injection molding machine injects into the mold. During injection, the pressure is divided into three injection stages for control. The first-stage screw switching position is adjusted to the point where the plastic melt passes through the runner and just enters 6% of the cavity by volume. The second-stage screw switching position is adjusted to the point where the plastic melt fills 75% of the cavity. The third-stage screw switching position is adjusted to the point where the plastic melt fills 98% of the cavity. Among them, the first-stage injection pressure is 80% and the injection speed is 15%. The second-stage injection pressure is 85% and the injection speed is 20%. The third-stage injection pressure is 80% and the injection speed is 10%.

[0046] E: Injection holding pressure: The holding pressure is 70% of the maximum injection pressure, the speed is lower than the minimum injection pressure of each stage, and the time is maintained for 30s;

[0047] F: Cooling the mold: Use cooling water at a temperature of 20°C to cool the mold, and use fully automatic system control technology to inject cooling water into the mold for cooling;

[0048] G: Blow out cold water: After cooling is completed, the system will blow in air to blow the cooling water in the mold water channel out of the mold;

[0049] H: Open the mold and take out the finished shell.

[0050] Embodiment 2:

[0051] The production process of cartridge cases is:

[0052] A: Selected materials: High-strength thermoplastic resin, metal powder and reinforcing fiber materials are selected as injection molding materials. The ratio of high-strength thermoplastic resin, metal powder and reinforcing fiber is 5:1:1. High-strength thermoplastic resin is composed of PE-polyethylene, PVC-polyvinyl chloride and PA-polyamide materials. Metal powder is composed of copper and chromium materials. Reinforcing fiber is composed of glass fiber and carbon fiber materials.

[0053] B: Drying materials: Place the injection molding materials in a drying oven at 80°C for 2 hours to make the humidity less than 0.05%, and then use the automatic feeding system to continuously feed the materials;

[0054] C: Mold preheating: Install the injection mold on the injection molding machine, preheat the mold before production mold closing, set the preheating temperature to 90℃, set the temperature of the moving mold electric heating tube to 70℃, and then close the mold;

[0055] D: Three-stage injection molding: The injection molding machine injects into the mold. During injection, the pressure is divided into three injection stages for control. The first-stage screw switching position is adjusted to the point where the plastic melt passes through the runner and just enters 8% of the cavity by volume. The second-stage screw switching position is adjusted to the point where the plastic melt fills 80% of the cavity. The third-stage screw switching position is adjusted to the point where the plastic melt fills 99% of the cavity. Among them, the first-stage injection pressure is 85% and the injection speed is 18%. The second-stage injection pressure is 90% and the injection speed is 30%. The third-stage injection pressure is 85% and the injection speed is 15%.

[0056] E: Injection holding pressure: The holding pressure is 75% of the maximum injection pressure, the speed is lower than the minimum injection pressure of each stage, and the time is maintained for 35s;

[0057] F: Cooling the mold: Use cooling water at a temperature of 22°C to cool the mold, and use fully automatic system control technology to inject cooling water into the mold for cooling;

[0058] G: Blow out cold water: After cooling is completed, the system will blow in air to blow the cooling water in the mold water channel out of the mold;

[0059] H: Open the mold and take out the finished shell.

[0060] Embodiment three:

[0061] The production process of cartridge cases is:

[0062] A: Selected materials: High-strength thermoplastic resin, metal powder, and reinforcing fiber materials are selected as injection molding materials. The ratio of high-strength thermoplastic resin, metal powder, and reinforcing fiber is 5:1:1. The high-strength thermoplastic resin is composed of PP-polypropylene, PVC-polyvinyl chloride, and PA-polyamide materials. The metal powder is composed of manganese and chromium materials. The reinforcing fiber is composed of carbon fiber and boron fiber materials.

[0063] B: Drying materials: Place the injection molding materials in a drying oven at 90°C for 3 hours to make the humidity less than 0.05%, and then use the automatic feeding system to continuously feed the materials;

[0064] C: Mold preheating: Install the injection mold on the injection molding machine, preheat the mold before production mold closing, set the preheating temperature to 100℃, set the temperature of the moving mold electric heating tube to 75℃, and then close the mold;

[0065] D: Three-stage injection molding: The injection molding machine injects into the mold. During injection, the pressure is divided into three injection stages for control. The first-stage screw switching position is adjusted to the point where the plastic melt passes through the runner and just enters 10% of the cavity volume. The second-stage screw switching position is adjusted to the point where the plastic melt fills 85% of the cavity. The third-stage screw switching position is adjusted to the point where the plastic melt fills 99% of the cavity. Among them, the first-stage injection pressure is 90% and the injection speed is 20%. The second-stage injection pressure is 95% and the injection speed is 40%. The third-stage injection pressure is 90% and the injection speed is 20%.

[0066] E: Injection holding pressure: The holding pressure is 80% of the maximum injection pressure, the speed is lower than the minimum injection pressure of each stage, and the time is maintained for 40s;

[0067] F: Cooling the mold: Use cooling water at a temperature of 24°C to cool the mold, and use fully automatic system control technology to inject cooling water into the mold for cooling;

[0068] G: Blow out cold water: After cooling is completed, the system will blow in air to blow the cooling water in the mold water channel out of the mold;

[0069] H: Open the mold and take out the finished shell.

[0070] The bullet shells can be manufactured by the above three groups of embodiments, among which the bullet shells manufactured by the second group of embodiments have the best effect. The present invention adopts the injection molding process to manufacture the shell 1, which is not only simple in process and convenient for mass production, but also has low material cost, thereby reducing production cost.

[0071] In summary: the bullet uses high-strength thermoplastic resin, metal powder and reinforced fiber material to make the shell 1, which not only reduces the weight of the bullet and is convenient to carry, but also greatly increases the proportion of composite materials, thereby reducing the heat conducted to the chamber, which is conducive to continuous shooting. The matching arrangement between the connecting hole 15, the connecting column 33 and the annular flange 34 not only facilitates the assembly of the bullet, but also makes the shell 1 and the bottom edge 3 more secure, increases the reliability of the connection between the shell 1 and the bottom edge 3, and ensures the reliability of the composite material part and the metal part. The shell 1 is made by injection molding technology, which is not only simple in process and convenient for mass production, but also has low material cost, thereby reducing production cost.

[0072] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A process for producing a bullet, the bullet comprising a cartridge case (1), one end of the cartridge case (1) being connected to a bullet head (2), and one end of the cartridge case (1) being connected to a bottom edge (3), characterized in that: The cartridge case (1) is made of high-strength thermoplastic resin, metal powder and reinforced fiber material through an injection molding process. The cartridge case (1) comprises a cartridge head (12), a cartridge shoulder (13) and a cartridge wall (14). A cartridge opening (11) is provided at one end of the cartridge head (12). A metal ring (17) is fixedly connected to the inner side of the cartridge opening (11). A metal layer (18) is fixedly connected to the inner side of the cartridge wall (14) at the rear of the cartridge case (1). A ignition hole (16) is provided at the middle of the rear of the cartridge case (1). A connecting hole (15) is provided at the edge of the rear of the cartridge case (1). A connecting column (33) is fixedly connected to the edge of one side of the bottom edge (3). An annular flange (34) is fixedly connected to the outer side of the middle of the connecting column (33). The production process of the cartridge case is as follows: A: Selected materials: high-strength thermoplastic resin, metal powder, and reinforcing fiber material are selected as injection molding materials, wherein the ratio of the high-strength thermoplastic resin, metal powder, and reinforcing fiber is 5:1:1, the high-strength thermoplastic resin is composed of one or more materials selected from PE-polyethylene, PP-polypropylene, PVC-polyvinyl chloride, PS-polystyrene, and PA-polyamide, the metal powder is composed of one or more materials selected from copper, tin, manganese, and chromium, and the reinforcing fiber is composed of one or more materials selected from aramid fiber, glass fiber, carbon fiber, and boron fiber; B: Drying materials: Place the injection molding materials in a drying oven and dry them at 70℃~90℃ for 1~3h to make the humidity less than 0.05%, and then use the automatic feeding system to continuously feed the materials; C: Mold preheating: Install the injection mold on the injection molding machine, preheat the mold before production mold closing, set the preheating temperature to 80-100℃, set the temperature of the moving mold electric heating tube to 65-75℃, and then close the mold; D: Three-stage injection molding: The injection molding machine injects into the mold, and the pressure is divided into three injection stages during injection. The first-stage screw switching position is adjusted to the plastic melt passing through the runner and just entering the cavity by 6% to 10% of the volume, the second-stage screw switching position is adjusted to the plastic melt filling the cavity by 75% to 85%, and the third-stage screw switching position is adjusted to the plastic melt filling the cavity by 98% to 99%. Among them, the first-stage injection pressure is 80% to 90%, the injection speed is 15% to 20%, the second-stage injection pressure is 85% to 95%, the injection speed is 20% to 40%, and the third-stage injection pressure is 80% to 90%, and the injection speed is 10% to 20%; E: Injection holding pressure: The holding pressure is 70% to 80% of the maximum injection pressure, the speed is lower than the minimum injection pressure of each stage, and the time is maintained for 30s to 40s; F: Cooling the mold: Use cooling water with a temperature of 20℃~24℃ to cool the mold, and use fully automatic system control technology to inject cooling water into the mold for cooling; G: Blow out cold water: After cooling is completed, the system will blow in air to blow the cooling water in the mold water channel out of the mold; H: Open the mold and take out the finished shell.

2. The production process of a bullet according to claim 1, characterized in that: The connecting hole (15) is matched with the connecting column (33), and the annular flange (34) is extrusion-connected to the connecting hole (15).

3. The production process of a bullet according to claim 1, characterized in that: A detonator (31) is fixedly connected to the middle of the bottom edge (3), and the bottom edge (3) is made of copper.

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