Aug 5, 2025

US12379195 - Method for manufacturing an ammunition cartridge and ammunition cartridge

The present invention pertains to the field of the arms industry and metallurgy, and also to the fields of materials engineering and chemical engineering. More specifically, the present invention refers to a novel ammunition cartridge comprising reinforced polymer and the manufacturing process thereof. The ammunition cartridge serves for receiving the gunpowder so that explosion can occur inside the weapon barrel. The technology proposed reduces the quantity of components to be pre-manufactured and assembly processes on the product, producing a full cartridge, directly upon injecting the thermoplastic, and can also use bi-component injection. With this, the portion of the collar ring can be made entirely of fiber-reinforced polymer material, which reduces the weight of the item and is beneficial for the useful life of the weapon in the bolt region.

Assignee: COMPANHIA BRASILEIRA DE CARTUCHOS SERVIO NACIONAL DE APRENDIZAGEM INDUSTRIAL—DEPARTAMENTO REGIONAL DO RIO GRANDE DO SUL—SENAI/RS
Inventors: Andre Giacomini Dias Carmona, Andre Viegas Wentz, Andre Weijh, Claudio Wietky Junior, Frederico Eggers, Glaucio De Almeida Carvalho, Marcelo Moreno, Vinicius Cabreira
Filing date: 2022-09-08

ammunitionmanufacturingcartridge

The invention describes a method for manufacturing an ammunition cartridge using a reinforced polymer, which simplifies the assembly process and reduces the weight of the cartridge. This process includes creating a core and a metal insert, followed by injecting a molding material and recycling the core, resulting in a more efficient production of cartridges.

Claim 1

A method of manufacturing an ammunition cartridge comprising the following steps: (S 1 ) producing a core ( 6 ), said step (S 1 ) comprising the following substeps: (S 11 ) premanufacturing the core ( 6 ); (S 2 ) producing a metal insert ( 2 ), said step (S 2 ) comprising the following substeps: (S 21 ) obtaining the metal insert ( 2 ) by machining, injection, sintering or forming; (S 3 ) preparing an ammunition cartridge ( 1 ), said step (S 3 ) comprising the following substeps: (S 31 ) adding the core ( 6 ), produced according to the step (S 1 ), and the metal insert ( 2 ), produced according to the step (S 2 ), into a mold ( 7 ); (S 32 ) injecting a molding material into the mold ( 7 ), said mold ( 7 ) comprising the core ( 6 ) and the metal insert ( 2 ); (S 33 ) cooling and solidifying the molding material from step (S 32 ); (S 34 ) removing the mold ( 7 ), and obtaining an assemblage ( 8 ), said assemblage ( 8 ) comprising the ammunition cartridge ( 1 ) and the core ( 6 ) inserted inside said ammunition cartridge ( 1 ); and (S 36 ) removing the core ( 6 ) from the ammunition cartridge ( 1 ) by means that alter its structural integrity or the physical state of said core ( 6 ) from solid to liquid or to a gas, obtaining a core ( 6 ) in liquid or gaseous state; and obtaining the ammunition cartridge ( 1 ); (S 4 ) recycling the core ( 6 ) in liquid state, said step (S 4 ) comprising the following substeps; (S 41 ) pouring the core ( 6 ) in liquid state into a recipient; and (S 44 ) solidifying the core ( 6 ) in liquid state, obtaining the core ( 6 ), and returning the core ( 6 ) to step (S 11 ), wherein steps (S 1 ) and (S 2 ) occur in parallel, and wherein the core ( 6 ) is castable or consumable. (S 1 ) producing a core ( 6 ), said step (S 1 ) comprising the following substeps: (S 11 ) premanufacturing the core ( 6 ); (S 11 ) premanufacturing the core ( 6 ); (S 2 ) producing a metal insert ( 2 ), said step (S 2 ) comprising the following substeps: (S 21 ) obtaining the metal insert ( 2 ) by machining, injection, sintering or forming; (S 21 ) obtaining the metal insert ( 2 ) by machining, injection, sintering or forming; (S 3 ) preparing an ammunition cartridge ( 1 ), said step (S 3 ) comprising the following substeps: (S 31 ) adding the core ( 6 ), produced according to the step (S 1 ), and the metal insert ( 2 ), produced according to the step (S 2 ), into a mold ( 7 ); (S 32 ) injecting a molding material into the mold ( 7 ), said mold ( 7 ) comprising the core ( 6 ) and the metal insert ( 2 ); (S 33 ) cooling and solidifying the molding material from step (S 32 ); (S 34 ) removing the mold ( 7 ), and obtaining an assemblage ( 8 ), said assemblage ( 8 ) comprising the ammunition cartridge ( 1 ) and the core ( 6 ) inserted inside said ammunition cartridge ( 1 ); and (S 36 ) removing the core ( 6 ) from the ammunition cartridge ( 1 ) by means that alter its structural integrity or the physical state of said core ( 6 ) from solid to liquid or to a gas, obtaining a core ( 6 ) in liquid or gaseous state; and obtaining the ammunition cartridge ( 1 ); (S 31 ) adding the core ( 6 ), produced according to the step (S 1 ), and the metal insert ( 2 ), produced according to the step (S 2 ), into a mold ( 7 ); (S 32 ) injecting a molding material into the mold ( 7 ), said mold ( 7 ) comprising the core ( 6 ) and the metal insert ( 2 ); (S 33 ) cooling and solidifying the molding material from step (S 32 ); (S 34 ) removing the mold ( 7 ), and obtaining an assemblage ( 8 ), said assemblage ( 8 ) comprising the ammunition cartridge ( 1 ) and the core ( 6 ) inserted inside said ammunition cartridge ( 1 ); and (S 36 ) removing the core ( 6 ) from the ammunition cartridge ( 1 ) by means that alter its structural integrity or the physical state of said core ( 6 ) from solid to liquid or to a gas, obtaining a core ( 6 ) in liquid or gaseous state; and obtaining the ammunition cartridge ( 1 ); (S 4 ) recycling the core ( 6 ) in liquid state, said step (S 4 ) comprising the following substeps; (S 41 ) pouring the core ( 6 ) in liquid state into a recipient; and (S 44 ) solidifying the core ( 6 ) in liquid state, obtaining the core ( 6 ), and returning the core ( 6 ) to step (S 11 ), wherein steps (S 1 ) and (S 2 ) occur in parallel, and wherein the core ( 6 ) is castable or consumable. (S 41 ) pouring the core ( 6 ) in liquid state into a recipient; and (S 44 ) solidifying the core ( 6 ) in liquid state, obtaining the core ( 6 ), and returning the core ( 6 ) to step (S 11 ), wherein steps (S 1 ) and (S 2 ) occur in parallel, and wherein the core ( 6 ) is castable or consumable.

Google Patents

https://patents.google.com/patent/US12379195

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12379195