US 11,287,229 B1 · Process for preparing foam celluloid parts

Abstract

The present invention is directed to a process for making combustible foam celluloid munition parts having high aspect ratios, different densities or having an insert embedded into the foam celluloid munition part. The process for making such foam celluloid munition part requires pre-soaking dry particles of celluloid, placing the celluloid particles into a munition part mold, exposing the celluloid particles to high heat and pressure until the celluloid particles expand and fuse into the shape of the mold. Varying the density or the size of the celluloid particles used in the process produces munition parts having different densities. In addition, the placement of inserts into the particles prior to exposure to high heat and pressure produces munition parts having inserts that are useful for identification and tracking of such parts.

Claims16

Dependent claims

A method for making a foam celluloid munition part containing an embedded insert comprised of:

exposing dry solid celluloid particles to a physical blowing agent at a pressure of 40 psi to about 10,000 psi to pre-soak the dry celluloid particles;
transferring the pre-soaked celluloid particles into a munition part mold;
placing an insert into the munition part mold containing pre-soaked the celluloid particles;
exposing the munition part mold containing the pre-soaked celluloid particles and an insert to an elevated temperature and pressure, wherein the celluloid particles expand and fuse around the insert thereby embedding the insert and forming the foam celluloid munition part;
removing the foam celluloid munition part containing the embedded insert from the munition part mold.

2 more elements

Dependencies are inferred from the claim text.

Process for preparing foam celluloid parts

Life of this patent

Process for preparing foam celluloid parts

Life of this patent

Abstract

Claims16