Frangible bullet and its manufacturing method
First Claim
Patent Images
1. A method for producing a frangible bullet, comprising:
- providing a copper-based metal powder with a particle size distribution of more than 120 micrometers;
pressing the particles of the powder with the aid of an organic lubricant up to a density of more than 6.9 g/cm3, wherein the organic lubricant is a polymer selected from the group comprising polyethylenes, polyamides or polyvinyl alcohols, thereby favoring the cold welding of the particles; and
subjecting the pressed particles to an oxidative heat treatment thereby allowing physical bonds between polymer chains in the organic lubricant and oxygen as well as the growth of an oxidised layer on the pressed particles.
1 Assignment
0 Petitions
Accused Products
Abstract
This invention describes a frangible bullet made from particles of a copper-based metal powder with the aid of an organic lubricant, which have been pressed so that the pressed particles have a density of more than 6.9 g/cm3, where the composition has been treated with thermal oxidation.
33 Citations
8 Claims
-
1. A method for producing a frangible bullet, comprising:
-
providing a copper-based metal powder with a particle size distribution of more than 120 micrometers; pressing the particles of the powder with the aid of an organic lubricant up to a density of more than 6.9 g/cm3, wherein the organic lubricant is a polymer selected from the group comprising polyethylenes, polyamides or polyvinyl alcohols, thereby favoring the cold welding of the particles; and subjecting the pressed particles to an oxidative heat treatment thereby allowing physical bonds between polymer chains in the organic lubricant and oxygen as well as the growth of an oxidised layer on the pressed particles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification