High-performance plastic cartridge case and manufacturing method thereof

Abstract

The invention relates to the technical field of material manufacturing, in particular to a high-performance plastic cartridge case and a manufacturing method thereof. The manufacturing process mainly comprises the four steps of premixing, granulating, injection molding and demolding. Compared with a traditional cartridge case, the mass of the manufactured high-performance plastic cartridge case is reduced by 30% or above. According to the high-performance plastic cartridge case manufactured by the method, material innovation can be maintained, and meanwhile, good mechanical properties can be achieved. The manufacturing method is simple and has wide applicability.

Description

Technical Field

[0001] The invention relates to the technical field of material manufacturing, and in particular to a high-performance plastic cartridge case and a manufacturing method thereof. Background Art

[0002] With the rapid development of society and the upgrading of weapons, high-performance materials have emerged in the public's field of vision. In modern warfare, soldiers have to carry individual weapons and ammunition, communication equipment, support equipment and other combat loads to perform various combat missions. The combat load of soldiers is closely related to combat effectiveness and is the key to victory or defeat in war.

[0003] Under the current circumstances, developing new lightweight ammunition is the most effective way to reduce the load on soldiers. However, existing technologies have problems such as insignificant weight reduction effect or poor quality of products after weight reduction (it is impossible to maintain material consistency while having good mechanical properties).

[0004] Using high-performance engineering plastics as a substitute for traditional metal shells is one of the technical keys to lightweight ammunition and an inevitable trend in the development of lightweight ammunition. The application of high-performance engineering plastics in shells is a demand for lightweighting of current and future light weapons, and is of great significance for saving strategic metal materials, reducing the combat load of soldiers, and improving the sustainable shooting ability and survivability of soldiers. Summary of the invention

[0005] The technical problems of the present invention are:

[0006] The existing technology has problems such as the weight reduction effect is not obvious or the product quality after weight reduction is poor (it is impossible to maintain material consistency while having good mechanical properties).

[0007] The objects of the present invention are:

[0008] The present invention aims to provide a method for manufacturing a high-performance plastic cartridge case to meet market demand.

[0009] The technical solution of the present invention is:

[0010] In one aspect, the present invention provides a method for manufacturing a high-performance plastic cartridge case. The method comprises the following steps:

[0011] Step 1: Premixing: Premix CF (carbon fiber) and PEEK in a high-speed mixer in a certain ratio to make the two materials evenly mixed.

[0012] Step 2: Granulation: The fully mixed material is fed into a twin-screw extruder for extrusion and granulated by a pelletizer to obtain granules with uniform particle size.

[0013] Step 3: Injection molding. Put the particles with uniform particle size into the injection molding machine for injection molding test. The parameters of the injection molding machine are: barrel temperature: 385-410℃, mold temperature: 170-200℃, injection pressure: 115-130MPa, clamping pressure: 120-140MPa, holding pressure: 85-105MPa.

[0014] Step 4: Demolding: After the injection molded product reaches a certain temperature, demold it to obtain the desired product.

[0015] Preferably, in step 1: carbon fiber and polyetheretherketone are weighed according to a CF (carbon fiber) mass ratio of 20%-30%, and the weighed materials are mixed in a high-speed mixer to ensure the uniformity of the materials.

[0016] Preferably, in step 2: the particle size diameter of the granulated material is 4 mm to ensure the consistency of the particle size.

[0017] Preferably, in step 3: the parameters of the injection molding machine are: barrel temperature: 390° C., mold temperature: 180° C., injection pressure: 120 MPa, clamping pressure: 125 MPa, and holding pressure: 89 MPa.

[0018] Preferably, in step 3: the parameters of the injection molding machine are: barrel temperature: 395°C, mold temperature: 175°C, injection pressure: 125MPa, clamping pressure: 130MPa, and holding pressure: 92MPa.

[0019] Preferably, in step 3: the parameters of the injection molding machine are: barrel temperature: 400°C, mold temperature: 180°C, injection pressure: 124MPa, clamping pressure: 135MPa, holding pressure: 95MPa.

[0020] Preferably, in step 3: the parameters of the injection molding machine are: barrel temperature: 405°C, mold temperature: 190°C, injection pressure: 128MPa, clamping pressure: 138MPa, holding pressure: 98MPa.

[0021] On the other hand, the present invention provides a high-performance plastic cartridge case, which is manufactured using the above method.

[0022] The advantages and beneficial effects of the present invention are:

[0023] The high-performance shell material manufactured by the present invention can effectively reduce the weight of the shell and improve the combat capability of soldiers. The high-performance shell material manufactured by the present invention can maintain the consistency of the material while having good mechanical properties. The manufacturing method of the present invention is simple and has wide applicability. DETAILED DESCRIPTION

[0024] The embodiments described below are part of the embodiments of the present invention, but not all of them. 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.

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other, and the various embodiments may refer to and quote each other.

[0026] The present invention relates to the technical field of material manufacturing, and in particular to a method for manufacturing a high-performance plastic cartridge case. The manufacturing process is mainly achieved through four steps: premixing, granulation, injection molding, and demoulding. The high-performance plastic cartridge case manufactured by the present invention is more than 30% lighter than a traditional cartridge case. The high-performance plastic cartridge case manufactured by the present invention can have good mechanical properties while maintaining material innovation. The manufacturing method of the present invention is simple and has wide applicability.

[0027] The present invention proposes a method for manufacturing a high-performance plastic cartridge case. The method can maintain material consistency while having good mechanical properties. The method comprises the following steps:

[0028] Step 1: Premixing: Premix CF (carbon fiber) and PEEK in a high-speed mixer according to a certain ratio to make the two materials evenly mixed, wherein the content of CF (carbon fiber) is 30% and the rest is PEEK (polyetheretherketone).

[0029] Step 2: Granulation. The fully mixed material is fed into a twin-screw extruder for extrusion and granulated by a pelletizer to obtain granules with uniform particle size. The particle size is about 4 mm.

[0030] Step 3: Injection molding. Put the particles with uniform particle size into the injection molding machine for injection molding test. The parameters of the injection molding machine are: barrel temperature: 385-410℃, mold temperature: 170-200℃, injection pressure: 115-130MPa, clamping pressure: 120-140MPa, holding pressure: 85-105MPa.

[0031] Step 4: Demolding. After the injection molded product reaches a certain temperature, demould it to obtain the desired product. The temperature can be room temperature.

[0032] Implementation Cases:

[0033] ⑴ After the raw materials are prepared according to certain chemical composition and weight percentage, they are placed in a high-speed mixer and mixed evenly;

[0034] (2) Feed the fully mixed materials into a twin-screw extruder for extrusion and pelletize them into pellets using a pelletizer to obtain pellets with uniform particle size of about 4 mm.

[0035] ⑶Put the particles with uniform particle size into the injection molding machine for injection molding test. The parameters of the injection molding machine are: barrel temperature: 385-410℃, mold temperature: 170-200℃, injection pressure: 115-130MPa, clamping pressure: 120-140MPa, holding pressure: 85-105MPa.

[0036] (4) After the injection molded product reaches a certain temperature, demould it to obtain the desired product. The temperature can be room temperature.

[0037] ⑸ Apply the injection molded cartridge case to a certain type of bullet test to ensure that the index requirements are met.

[0038] It should be noted that the above-mentioned process operations can be applied in combination to different degrees. For the sake of simplicity, the implementation methods of various combinations are not described in detail. Technical personnel in this field can flexibly adjust the order of the above-mentioned operating steps according to actual needs, or flexibly combine the above-mentioned steps.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the field can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.

Claims

1. A method for manufacturing a high-performance plastic cartridge case, characterized in that: The following steps are involved: Step 1: Premixing: Premix CF (carbon fiber) and PEEK in a high-speed mixer in a certain ratio to make the two materials evenly mixed. Step 2: Granulation: The fully mixed material is fed into a twin-screw extruder for extrusion and granulated by a pelletizer to obtain granules with uniform particle size. Step 3: Injection molding. Put the particles with uniform particle size into the injection molding machine for injection molding test. The parameters of the injection molding machine are: barrel temperature: 385-410℃, mold temperature: 170-200℃, injection pressure: 115-130MPa, clamping pressure: 120-140MPa, holding pressure: 85-105MPa. Step 4: Demolding: After the injection molded product reaches a certain temperature, demold it to obtain the desired product.

2. The method according to claim 1, characterized in that In step 1: Carbon fiber and polyetheretherketone are weighed according to a CF (carbon fiber) mass ratio of 20%-30%, and the weighed materials are mixed in a high-speed mixer to ensure the uniformity of the materials.

3. The method according to claim 1, characterized in that In step 2: The particle size of the granulated material is 4mm in diameter to ensure the consistency of the particle size.

4. The method according to claim 1, characterized in that In step 3: The parameters of the injection molding machine are: barrel temperature: 390°C, mold temperature: 180°C, injection pressure: 120MPa, clamping pressure: 125MPa, and holding pressure: 89MPa.

5. The method according to claim 1, characterized in that In step 3: The parameters of the injection molding machine are: barrel temperature: 395°C, mold temperature: 175°C, injection pressure: 125MPa, clamping pressure: 130MPa, and holding pressure: 92MPa.

6. The method according to claim 1, characterized in that In step 3: The parameters of the injection molding machine are: barrel temperature: 400°C, mold temperature: 180°C, injection pressure: 124MPa, clamping pressure: 135MPa, and holding pressure: 95MPa.

7. The method according to any one of claims 1 to 6, characterized in that: In step 3: The parameters of the injection molding machine are: barrel temperature: 405°C, mold temperature: 190°C, injection pressure: 128MPa, clamping pressure: 138MPa, and holding pressure: 98MPa.

8. A high performance plastic cartridge case, characterized in that: Obtained by any one of the manufacturing methods of claims 1 to 7.

9. A high performance plastic cartridge case as claimed in claim 8, characterized in that: in: The product after demoulding is resistant to high temperatures, does not deform at 2000°C, and is corrosion-resistant.

10. A high performance plastic cartridge case as claimed in claim 8 or 9, characterized in that: in: After demoulding, the product has a tensile strength of ≥400Mpa.