Method for the production of combustible ammunition containers and product thereof
First Claim
1. In a process for the manufacture of a combustible munitions container, wherein a hollow, water-permeable but fiber-impermeable, porous shape under suction is contacted with an aqueous suspension of nitrocellulose fibers, cellulose fibers, and synthetic resin binder material thereby forming a wet web, said web is pressed to remove free water, dried and hot-pressed to form a molded container, the improvements which comprise rotating said forming shape axially and contacting different longitudinal zones of said porous shape with a different aqueous suspension containing said fibers and said binder, the nitrocellulose fiber:
- cellulose fiber;
binder ratio in each said suspension being different from the ratio in each other suspension, whereby an ammunition container is produced which is non-uniform in its longitudinal composition.
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Abstract
A unitary combustible or explosive munitions container of uniform cross-section but of non-uniform linear composition is provided by depositing under suction two different fluid aqueous suspensions of fibrous propellant material and cellulose papermaking fibers on different touching zones of a hollow foraminous shape having an interior under vacuum, thereby forming a water-laid web on said shape, hot pressing the web to desired shape, and trimming the product to size. The process is suitable for the manufacture of cartridge cases and other ammunition containers.
20 Citations
18 Claims
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1. In a process for the manufacture of a combustible munitions container, wherein a hollow, water-permeable but fiber-impermeable, porous shape under suction is contacted with an aqueous suspension of nitrocellulose fibers, cellulose fibers, and synthetic resin binder material thereby forming a wet web, said web is pressed to remove free water, dried and hot-pressed to form a molded container, the improvements which comprise rotating said forming shape axially and contacting different longitudinal zones of said porous shape with a different aqueous suspension containing said fibers and said binder, the nitrocellulose fiber:
- cellulose fiber;
binder ratio in each said suspension being different from the ratio in each other suspension, whereby an ammunition container is produced which is non-uniform in its longitudinal composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 17, 18)
- cellulose fiber;
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14. A unitary ammunition container which is nonuniform is composition axially but which is uniform in composition transaxially, consisting essentially of a substantially completely combustible shell of a compressed and fused, uniformly interfelted, homogeneous mixture of propellant grade nitrocellulose fibers, cellulose papermaking fibers and a combustible binder therefor, the weight ratio of said nitrocellulose fibers to said cellulose papermaking fibers being between 90:
- 10 and 75;
25 at one end of said container and between 70;
30 and 50;
50 at the other end of said container. - View Dependent Claims (15)
- 10 and 75;
Specification