One envelope of plastic hunting cartridge, made of one single piece. (Machine-translation by Google Translate, not legally binding)

MEMORY

Ρ "76,862 *

i lojn ηύην 1

Brief Summary of the Invention

The invention relates to a one-piece plastic hunting hoop enclosure.

This casing is obtained by first selecting a piece of biaxially oriented plastic tube having lateral walls of uniform diameter, orientation and thickness over its entire length, the latter having been chosen to be substantially greater than the length of the desired casing tube. can be manufactured by any of many well-known methods to produce-tube »

biaxially oriented, the plastic tube of the type known in the industry as a Reifenhauser tube is preferred, which has been found to be satisfactory for these purposes. The method and apparatus for manufacturing this tube are illustrated in the US Pat. No. 2,961,711, issued in favor of Liedrich.

Next, my part of the tube of Reifenhauser is warmed up, just enough to soften the tube and not so much that it softens its biaxial orientation. The treatment is controlled to assure that in this softened end part the biaxial orientation is retained, at least to a substantial degree when it is then placed inside a stamp and shaped into a hunting cartridge with a cartridge. opening for the capsule extending longitudinally therein.

It has been found that such a cartridge casing can be produced at a relatively cost

26012. fifteen

Hctjn pñtn, 2

2 below, because preoisa wands material since it can be made of a biaxialmonte oriented plastic tube that is easily and relatively inexpensive made with equipment of the type of Reifenhauser, well known and already widely used in the industry. If conformation equipment is needed it is relatively simple and economical. If the resolving product has a relatively high degree of resistance, both in its bib section and in its section of the beating wall. Since the bib has unusual strength, it can be made too low to increase the versatility of the envelope in terms of volume. In addition, since the shorts are enteri'ao, problems associated with hunting cartridges that have separate legs are avoided,

33re ve pe s or ip ci on of the Dib uj os

The Pig. 1 is a vertical section view: · · · · · · · 9 a piece of softened Reifenhauser tube, with a section supporting it; '· * · •

The Pig. 2 is a vertical section view φ-'Λ'.illustrates the tube of the Pig. 1 after the die was moved up to form the bib. •• / Λ *

The Pig. 3 illustrates a loaded envelope a5. «T £ • • • * po illustrated in Pig. two;

': rLa Pig. 4 is a vertical section view of: «p; piece of softened tube, immediately before forming a flanged shell that does not require a bushing me. tonic;

The Pig. 5 illustrates the tube of the Pig. 4 after habei 'been formed into a total flanged envelope

09031 • a • • 'í' ¡se - -Λ ·· -il © J «n <w,

<img file="ES265232U_D0001.tif" />

«» · #.

qent of plastic;

Pig, 6 illustrates a loaded envelope of the type illustrated in Pig. 5;

Irig, 7 illustrates a piece of softened tube supported on a mandrel;

the Pig. 8 illustrates the tube of the Pig, 7 after the pictures have formed the softened delivery in a cross-section;

the Pig. 9 illustrates the cup for the pellets of the Pig. 8 after the expulsion from the stamp;

the Pig. 10 illustrates a piece of peuser tube hauser with a length of 50 »8 mm from its softened end;

the Pig. 11 illustrates the molding "of the Pig, 10 being plugged in;

the. Pig, 12 illustrates the molding plugged in 0¾ the · * · * * * »_b»

Pig. 11 being formed exi a full bib; ',.' Λ^? ·· '&gt; ·&gt;

The l^?ig, 13 illustrates the constituent formed e »* la, · *^r * »+ ·

Pig. 12 being expelled; and • · · · · · the Pig. 14 illustrates the shell ejected by a metal head or bushing applied thereto, • z · · / ·

I · · ·?

Detailed Description of the Invention • - · · «· * · *

It is preferred that the polymer materials which are used here be of the crystalline type which, upon being worked, as by extrusion or stretching, undergoes crystalline orientation, the orientation of the crystalline structure along the main axis of a cube. hunting cartridge of such polymeric materials produces an increase

09031

<img file="ES265232U_D0002.tif" />

¢ 0 o the tensile strength along the eye of the tube. Stretching the tube in such a way creates a biaxial orientation.

Defined polymers, such as polyethylene and high density polypropylene having a high degree of crystallinity, ie, at least 60% to 70%, are especially preferred polymeric materials for use in this invention.

The most commonly used polymeric materials are polyethylene opolymer or ethylene-copolymerized copolymer with another definition, such as butene-1 or hoxen-1.

All the preferred polymeric materials described above are referred to herein in general as eristali plastics. us. Such crystalline plastics for carcass envelopes can be oriented by providing for this a piece of cylindrical tube of a piece of crystalline polymer.

<img file="ES265232U_D0003.tif" />

<img file="ES265232U_D0004.tif" />

ea. Such a tube, if desired, as here, can also be stretched in the radial direction, to greatly increase resistance in that direction as well. " 4·;

··· '.: ·

We use a high-density polyethylene tube made of a material that can be purchased under the identifi-

<img file="ES265232U_D0005.tif" />

Soltex Polymer Corporation, Houston, Texas (United States). The tube made of this material stretches so much -

<img file="ES265232U_D0006.tif" />

llnjH nftuv • 15 sidewalls are straight and of one thickness and one uniform orientation in their entirety, the ratio (R ^) of the final length after such work to the original length is preferably in the range of 4,365 - 8,150, and the ratio (R ^) of the final average of the inner circumference and of the outer circumference from such worked to the original average of the inner circle and outer circumference, is preferably comprised in the range of 1,056. - 1,219,

We have found that when a hunting cartridge according to our invention is formed, a substantial amount of biaxial orientation is retained within the shell section of the shell. Several tests carried out to date indicate that the average of the culotte of such a cartridge approaches 1,054 and the average of the R_c is close to 0.8537, when the walls of the tube from which the bib is formed have an R_L average of ascitisS &amp; a9 · · · · · · 9 · W 5.cent and an R_(; approximate average 1,14. The amount that is retained varies somewhat, depending on the thickness of the wall of the envelope and the configuration of the item. The margin of R that has been found up to I «a * fe L ·" cha of 1,003 - 1,141 and the margin of Rq found before the date of 0.8298 - 0.8639. *.? ·;

• · Ζ *

The envelopes of house cartridges are produced in the manner described herein above, and have improved characteristics, in particular with respect to volumetric capacity. We have manufactured by the previous methods wrappers of satisfactory cartridges with a depth of cuote that varies between 0,965 mm and 8,89 mm. When a larger volume is needed, we use an envelope that

O9 ° 31 its entire length and it has 4,365 - 8,150 and a va1,219.

The end part of the soff nfim has a height of 2,286 mm. Thickness of such a bo varied between 0.305 mm and 0.991 μm, depending on the desired properties, with the preferred thickness being 0.599 mm. The tube has thick walls and inner diameters and eternal unifowaes, and has been oriented biaxially in a uniform manner in ne a value of R ^ of approximately lor of R of approximately 1,056 G

In spite of the contraction of decision, the sections of culote conserve in a substantial degree their biaxial orientation, and by fool we produce asses of height, substantially smaller.

In Fig. 1, a piece of biaxially oriented tube of such crystalline plastic cut to a predetermined length greater than normal is illustrated, in preparation for forming a shell with an unusually thin, uni-shaped core thereof, the orre or actives · * »* · * · * ♦ uniform throughout its length, and its lateral walls ΤΒο&gt; η of a uniform thickness in its entirety. It can be manufactured according to the US patent. ηδ 3,103,170 devfíQ'r vington or with the patent for the USA. ne 2.561.711 di $ *. Diedricli, or it may be of the type of Reifenhauser biennium * * · · · · · · * known in commerce, the latter having been stretched;

* · · During its manufacture, essentially uniformly, both-Ζχζaxial and circumferentially. : ·; · · «·.

With reference to Fig. 1, the selected tube 20 is heated at one end while it is rotated, to soften the plastic and cause it to contract, as illustrated in 21. We prefer to use a water heater. Elliptical Infrared Line, mess type

09031

<img file="ES265232U_D0007.tif" />

Hnjw nftro.

Aelo 5212 produced and marketed by the firm Research, inc. from Minneapolis, Minnesota, USA, Hot glycol and electric heating elements are examples of other heating media that can be used.

The softened end portion 21 is heated for a period of 9-14 seconds, until a temperature is reached, from ι87, δδθ to 190.6 °. The tube 20 is applied to the die 22, which has at its upper end a pin 24 for shaping the opening for the capsule, as illustrated, the die 22 having been moved up into the tube to a position to be applied. to the extra softened part 21 in preparation for the bib-forming process. It will be noted that the ex- trem diameter of the softened portion 21 of the tube 20 has returned to approximately the same size as the tube before it was oxyto- formed. This is commonly referred to as traction. '* »'.

* * · • · ·

In the Pig. 2 illustrates the section 22 extended "· · ·· upwardly within the fixed part 25 of the member of the • • • •«

tampa 26 to form a cross-sectional section 28 * · * · · · · * integral with the side walls 29 of the tube piece · # · pin 24 of the die 22 is received inside a mangyi ·· · «# to ejector 30 and forms an opening. 31 for the capsule. · • -'i * · * · "the transverse base 28, which is substantially more heavy * · · · · · ·

· «· · ·» That the side walls 29. ·· '. *

The shell is then ejected from the shell 26 through the ejector sleeve 30, with an annular peripheral flange 32 foi'med therein.

In the Pig. 3 the enclosure of the Pig is illustrated. 2 after a metal cap has been applied

O9 ° 31

<img file="ES265232U_D0008.tif" />

• 10

H®J «nfrnv 843 and the envelope has been loaded. Note that flange 32 is deformed and flares outward and fills flange 34.

There is a period of 0-10 seconds of re-run time and cooling immediately following the formation of the cross-section section 28, as shown in Fig. 2. The temperature of the stamps is approximately 60, OSO or 82.2SC and the base 28 is formed at pressures of approximately 130,055 ~ 140,600 g / mm ^, the die clearances used are approximately 0.010 mm to 0.127 mm.

The thickness of the tube wall can be from about 0.305 mm to 0.991 mm. The thick Sun culotte 28 for maximum volume is, preferably, about 2,286 mm, but we have produced envelopes with satisfactory culotes of only 0,965 mm thick, and we believe that they can become as thin as 0.762 mm. \ i »&lt;·.

\ · ··

In Fig. 4 e © illustrates a piece of pipe 39 / A © l * .. * · '• · · »

Reifenhauser of · an appropriate length to provide ^. * * * A fully plastic-wrapped envelope with an • • • • • • • • • larger batch. One end has been heated to provide a softened end portion 36. The tube 35 'has been applied to a die 38 having an opening pin for the capsule. . Rodeandq / to the die 38 there is a detaching sleeve 41, capable of mo ^ í^::

relative to that, and that moves with the same upon entering the die in the stamp 40.

In Fig. 5 the next step is illustrated, in which the die 38 is moved upwardly within the lower die member 42, the latter being made of mo09031

<img file="ES265232U_D0009.tif" />

. i?

llojn nftm.

Independently located and being positioned as illustrated by the movable upper stamping member 43, the troquol 38 and the tube 35 are applied thereto. SI stamping 38 and the two stamped 42 3 '43 cooperatively form the end 36 in a transverse crotch 44 integral with the side walls 48. The upper punch member 43 has an axial bore 45, within which the bladder 39 extends to provide an opening 46 for the centrally disposed capsule. The lower stamp 42 and the upper stamp 43 form a radial flange 47. This ejector flange 47 is grasped by the ejector mechanism to eject the envelope after firing.

Then, the upper die 4 3 3 'moves upwards, the lower leaflet 42 moves downwards, while the detaching sleeve 41 moves downwards,

Then the die is lowered 38 3^r the thin-walled walls 48 of the shell or sleeve 41 are applied to detach the shell from the die 38. \ *. W \ · · · ·

The built-up envelope has been shown loaded in the. Pig. 6, and avoids the need for casouillo -'- Tje tálico illustrated in the Pig. 3. ·.*·.'

In the Pig. 3 illustrates an envelope loaded with the capsule 49 and the propellant 50 in the downward position.^r'e buckshot of acer.cqfrf,

· · •. · · That have been illustrated because their current use creates 1ε · .ηβ · * 'C ** cessity of a larger volume.

In the Pig. 6 the hunting cartridge is shown with formed in the Pigs. 4-5, with a capsule 53 and propellant 54 in position behind one. 55 cup for shot that has been made according to our invention. Tam30 are illustrated

09031

Hojt »ηί, πν fine steel pellets 56.

In Xa Pig, 7 does not illustrate a piece of tube 60 applied to the. mandrel 61 after an end portion 62 thereof has been softened, in preparation to the entrance of the lower member 64 of the stamp 63, preparatory to the formation of a rate for shot from thereon.

In the Pig, 8 a movable member 65 of the stamp 63 with an ejector pin 66 is illustrated. When the mandrel 61 is moved up, it forms the integral culmination 67 with the side walls 68 and an annular flange 69 is formed in the cullet section 67 to function as a seal, as illustrated in the Pigs. . 3 and 6.

In the Pig. 9 the mandrel 6-j is removed and the ejector pin 66 is lowered to eject the finished pellet rate. The section of the crotch 67 and the side sections 68 of such a cup for pellets are both._F Ved essentially biaxially. Because of this, these parts readily support the greatest efforts and pressures.

4 · · · occur when shooting. Its increased resistance protects · · · · against the penetration of the steel shot 52,57 into the side networks and thus prevents the prob

Vf more ballistic currents and damage.

· &lt;7

In the Pig. 10 a block 70 simil8f is illustrated^,'p * e ^:The longest such tube in the die 71 after being turned while heating its end by simile means for approximately 15 seconds until it reaches a temperature of 190.650, in preparation for the confoi our favorite envelope foxma. Da source

09031 ηύηι, 11 I of heat is concentrated in only the upper 2,362 mm of the tube and is gradually lowered to maintain the same distance between it and the end of the tube, as the upper end of the latter contracts 3 'to form a molding 72, it is enough that today they have been softened approximately 50.8 mm of tube,

In the Pig. 11 shows the outer stamp 73 cooperating with the inner stamp 74 and plugging in only the main part of the soft molding 72 inside .... '. .

the walls 75, leaving a substantial amount of the molding disposed away from the end of the supporting side walls 75 ending in 76.

Ib la Pig. 12 illustrate the die 71 and ln tempo, 74 forming the culvert section 77, with the tang 78 extending into the axial bore of the die. 74 and forming therein opening 79 for the capsule. The axial dimension of the plugged part is approximately 4.5 ^ X * ^ m, w · · · while the axial dimension of the delivery does not plug in approximately · 3,048 mm. .¾

In FIG. 13, the stamp 74 is shown below the envelope when descending into stamp 73, "

after the die has been removed. 71. In the Pig. l4 &lt;Mpe • »* * illustrates the envelope after it has been applied to the metal cap 80.

· - »

.. · *

We use substantially the same materials, tubes, heaters, die clearances and pressures, to manufacture each of the previous enclosures. If more plastic is used, a slightly higher heating time will be necessary. Stop, make the envelope of the Pig. 14, we prefer an axial dimension of 7.62 mm, with the part

<img file="ES265232U_D0010.tif" />

I

-chopper gives approximately 4,572 mm but, of course, you can use thicker or thinner culotes, depending on the

are needed.

By the above methods, one-piece plastic wraps are produced with integral culottes. They have fewer failures in the side walls or in the ferrules, they are simple and economical production, and they have a greater volumetric capacity,

In considering this invention, it should be remembered that the present disclosure is illustrative only and that the scope of the invention will be determined by the appended claims.

• 9 * * * S * * R »·

9 9 • · 9 * '· · &lt;

*&gt; · * · '«9 · · • * · ·······································

09031

Ρ »/

Itajn no.

± 5