Frangible portion for a high strength polymer-based cartridge casing and manufacturing method

Abstract

A high strength polymer-based cartridge casing can include a first end having a mouth and a neck extending away from the mouth. Next, a shoulder extends below the neck and away from the first end. The cartridge can have a frangible portion capable of being split upon discharge of a projectile. A projectile can be disposed in the mouth.

What is claimed is: 
     
         1 . A high strength polymer-based cartridge casing inclosing a volume, comprising:
 a first end having a mouth;   a neck extending away from the mouth;   a shoulder extending below the neck and away from the first end;   a bullet configured to impact a target and disposed in the mouth; and   a frangible portion capable of being split upon discharge of the projectile;   wherein the split of the frangible portion prevents a second projectile from being disposed in the mouth, and   wherein at least the mouth, the neck, the shoulder and the frangible portion are formed of at least one polymer.   
     
     
         2 . The high strength polymer-based cartridge casing of  claim 1 , wherein the frangible portion comprises at least one of, cut-outs, a reduced material wall thickness of the neck, scallops, and perforated seams. 
     
     
         3 . A method of making a high strength polymer-based cartridge casing comprising the steps of:
 molding a component using a polymer, comprising:
 a first end having a mouth; and 
 a second end opposite the first end; 
   molding a neck extending away from the mouth;   molding a shoulder extending below the neck and away from the first end; and   forming a frangible portion disposed on the neck, comprising a weakened portion the neck capable of being split upon discharge of a projectile and the projectile disposed in the mouth.   
     
     
         4 . The method of making a high strength polymer-based cartridge casing of  claim 3 , wherein the step of forming the frangible portion, further comprises forming at least one of, cut-outs, a reduced material wall thickness of the neck, scallops, and perforated seams.