LT5117B - Plastic cartridge case and device for the production thereof - Google Patents

Abstract

The invention relates to weapons engineering and concerns hunting and sporting plastic cartridge cases. The aim of the invention is to improve the ballistic properties and resistance of the article and to reduce production costs. The inventive cartridge case is embodied in the form of thin-walled cylinder provided with an external cylinder wall and an internal wall embodied in the form of three conical sections whose extension and taper are successively increase away from the bottom of the cylinder, said bottom being provided with a percussion cap hole. Said plastic cartridge case comprises a thin-walled diaphragm which divides the cavity of the cylinder from the percussion cap. The thickness of said diaphragm ranges from 0.2 to 0.5 mm. The inventive device for producing said plastic cartridge case comprises a casing mould embodied in the form of a matrix forming the outer surface of the cartridge case, a semimartix provided with a filler hole and forming the bottom of the cylinder, and a core male

Description

The invention relates to the field of weapon technology, and more specifically to hunting and sporting patrons with plastic guilloche.

Known plastic magazine for hunting and sporting patrons in the form of a thin-walled 10-piece sleeve with a cylindrical outer wall with a capsule opening at its bottom (English Patent No. 161422, F42B5 / 30, publ.1969).

From this source is known a device for making a plastic patron core, which has a mold and a distribution block with spill holes.

The main drawback of a known deep gully is its low resistance - 15 gully breaks down upon firing. The geometry of the inner surface of the core and its manufacturing technology do not guarantee its resistance as defects occur during casting.

These drawbacks are not known from the plastic patron bore whose inner wall of the sleeve is made of three conical parts, which are increasing in length and taper from the bottom. (Certificate of Useful Model RU No. 11882, F 42B 5/30, 1999 - Nearest Analogue).

The same source describes a deep core production facility.

The disadvantage of this cavity is that when the cartridge is refilled, powder particles can enter the interior of the capsule lighter, causing damage to the ignition process and. as a consequence, the dispersion of patron parameters.

The drawback of the die making device is that the presence of the cylindrical finger on the punch 25 causes the punch to deflect from the axis of the matrix in the process of flooding the working mass and, as a consequence, damage to the die geometry and decrease its resistance.

The technical challenge to which the invention is directed is to increase ballistic performance and product resistance while maintaining a low cost of production.

This problem is solved by providing a thin-walled sleeve-shaped plastic cartridge holder 30 with a cylindrical outer wall and an inner wall made in the form of three tapered portions with increasing length and taper from the base of the sleeve, which further has a thin-walled baffle separating bushing cavity and capsule-igniter mounting cavity. The thickness of the diaphragm diaphragm is selected within the range of 0.2 - 0.5 mm.

In a plastic cartridge core-making machine having a mold formed from a matrix forming the outer surface of the core, a semi-matrix with a tapered inlet opening forming the bottom of a bushing, and a hollow cylindrical cap molded on a semi-matrix an orifice and forming a circular inlet nozzle with a pouch.

Fig. 1 is a longitudinal section through the core; Fig. 2 is a sectional view of the core production unit. The recess is a sleeve l having an inner surface 2 made of three tapered parts. Capsule opening 4 made in borehole 3 4. Compensation groove made inside bushing (about opening 4) 5. Outer bore 3 making concentric opening 4 [recess 6. partition of bushing and capsule-igniter cavity partition 7.

The core production device consists of a matrix 8, a semi-matrix 9 and a pouch 10. A semi-matrix is provided with a hollow cylindrical finger II forming a closed capsule opening. An annular pouring nozzle 12 is formed between the surface of the finger ll and the surface of the pouch 10.

The acorn is produced this way. The plastic from the distribution block (not shown in the drawing) is fed into the cylindrical opening 9 of the semi-matrix, further it enters the cavity 11 of the finger and through the injection nozzle 12 into the cavity forming the mold. The cavity is filled evenly throughout the volume, thus avoiding defects. Removing the fabricated core from the mold removes the redundant part of the casting, leaving a gap between the core cavities.

The acorn produced in this way has the following advantages.

Gill resistance characteristics are increased. The separation of the cavities - the capsule and the combustion chamber - allows the ballistic characteristics of the cartridge to be improved by eliminating the influence of gunpowder on the burning intensity of the capsule and improving the firing process. Experiments have shown that the thickness of the baffle should be chosen within the range of 0.2 - 0.5 mm. The described dowel has increased resistance characteristics, low cost production, and allows several times to narrow the range of barrel pressure and shot velocity parameters of the primed cartridge.

Claims (1)

DEFINITION OF INVENTION l. Thin-walled sleeve-shaped plastic cartridge holder with a cylindrical outer 5 wall and inner wall in the form of three tapered portions with increasing length and taper from the base of the bushing, which has a hole for the capsule-igniter, characterized in that it additionally has a baffle separating the bushing and the capsule-igniter mounting hole having a thickness of 0 , 2 - 0.5 mm. I0 2. Plastic cartridge die-forming machine having a mold formed from a die forming die face, a half die with a tapered die opening, forming a bottom of a sleeve, and a punch forming an inner die face, characterized in that the die die is hollow. a finger forming a closed capsular opening and with a pouch I5 forming an annular nozzle.