EP3601941B1 - Device for extracting a stuck cartridge from a reconditioning die - Google Patents

Description

The invention relates to a device for releasing cartridge cases stuck in a die according to claim 1.

From the DE 40 08 382 C2 a device according to the preamble of claim 1 is known.

• eine Stützplatte zum Halten der Matrize ausgerichtet mit ihrer Axialbohrung in der Zugrichtung und gesichert gegen eine Bewegung in der Zugrichtung in einer Matrizenbohrung,
• eine in der Zugrichtung gesehen mit einem Abstand vor der Stützplatte angeordneten Hebevorrichtung, an der ein entgegen der Zugrichtung ausgerichtetes Zugelement mit Haltemitteln angeordnet ist, wobei die Haltemittel eingerichtet sind, die Patronenhülse an einem der Hebevorrichtung gegenüberliegenden Ende des Zugelementes zu halten, und
• Antriebsmittel zum Auseinandertreiben der Stützplatte und der Hebevorrichtung in und/oder entgegen der Zugrichtung.

From the US 4,273,024A discloses a device for pulling a cartridge case in a pulling direction from an axial bore of a die, which, viewed from the axial bore, has an external thread on the outside for holding the die in a loading press, comprising:

• a support plate for holding the die aligned with its axial bore in the pull direction and secured against movement in the pull direction in a die bore,
• a lifting device which is arranged at a distance in front of the support plate, seen in the pulling direction, on which a pulling element which is oriented opposite to the pulling direction and has holding means is arranged, the holding means being set up to hold the cartridge case at an end of the pulling element which is opposite the lifting device, and
• Driving means for driving the support plate and the lifting device apart in and/or against the direction of traction.

From the US 5,621,957A device for pulling an arrowhead out of a tree trunk in a pulling direction is known, comprising a support plate aligned parallel to the tree trunk for holding a gripping element for the arrowhead and drive means for driving apart the support plate and the tree trunk in and/or counter to the pulling direction.

Sport shooters and hunters often load empty shell casings, which is next

NEW DESCRIPTION PAGE 1a (fair copy)

financial benefits, it also yields better results than factory-loaded ammunition. For processing empty cartridge cases is from the DE 10 2013 020 748 B3 a trimmer calibration device is already known, with which the inner and outer dimensions of cartridge cases are processed in a die body by means of a milling machine, which is also referred to as trimming. This is because the firing of a cartridge case usually leads to an increase in the diameter over its entire length and to a longitudinal expansion of the cartridge case.

From the DE 400 83 82 C2 a loading press for cartridge cases is known. the DE 10 2004 04 64 62 A1 describes a combined seating and trimming die for reloading cartridge cases. Also from the US3204518A and US2571272A the reloading of empty cartridge cases is known.

With all these devices, however, there is always the problem that the sleeves get stuck in the calibrated die and cannot be removed or can only be removed by force, whereby the die can be damaged and/or become unusable, which, in addition to great effort and annoyance, also means financial burdens brings.

In general, cartridge cases to be filled should be calibrated using a die before reloading. As said before, stuck cartridge cases present a bigger problem when they have to be removed from the calibrating tool, namely the die. In particular, when reshaping a cartridge case to a different size, there is a risk that the stuck cartridge case will be very difficult to remove, especially if the top edge of the cartridge case is damaged. This can occur as a result of material fatigue after repeated loading of the cartridges, but also as a result of inferior material, brass alloys being designed too softly or incorrect handling. But even if the edge of the case is undamaged, it often happens that the case cannot be removed from the die.

• Materialermüdung;
• nicht ausreichende Qualität der Messinglegierung;
• falsche oder nicht senkrechte Bohrung und damit Schrägstellung des Gewindes.

In practice, however, the removal of a tightly seated sleeve from the matrix often fails in the known devices. The reasons for this are:

• material fatigue;
• insufficient quality of brass alloy;
• Incorrect or non-perpendicular bore and thus skewing of the thread.

The force required to dislodge a stuck case from the die exceeds the loading capacity of the means used, usually ending in the set screw stripping the cartridge base threads. Removing the sleeve, which is then stuck, requires considerable effort and expense, with which the polished inner surface of the die is usually damaged and the die can therefore no longer be used or can only be used to a limited extent.

1. 1. Sicherheit des verwendeten Gewehrs/Pistole/Revolver und damit die Sicherheit der diese Geräte bedienender Personen
2. 2. Die Treffsicherheit der Geschosse, die ebenfalls in vielerlei Hinsicht ein absolut notwendiger Sicherheitsfaktor ist.

The matrix rescue according to the current state of the art is unsafe and often fails for the reasons mentioned above. After an unsuccessful action, removing the sleeve on the tool is very time-consuming and can damage the expensive die, which means that it is often unsuitable for further use because its inner tolerances change. The calibration tolerances of a cartridge are extremely small, which has two main reasons:

1. 1. Safety of the rifle/pistol/revolver used and thus the safety of the people using these devices
2. 2. The accuracy of the projectiles, which is also an absolutely necessary safety factor in many respects.

It is therefore the object of the invention to provide a device with which cartridge cases that are stuck in a die can be safely removed without damaging the die as a result.

This object is achieved by the features specified in claim 1. Advantageous configurations and developments of the invention can be found in the dependent claims.

The basic idea of the invention is to arrange a support plate and a lifting plate at a distance from one another, with a die being screwed into the support plate, which die accommodates the fixed cartridge case to be treated. The die can be positioned opposite this plate using an external thread and optionally additionally fixed using a counter nut. The lifting plate and the support plate can be separated from each other by drive means. These drive means can be manual or electrically automated. According to the invention, the lifting plate and the support plate are separated from each other by drive means in the form of jack screws which are screwed into the support plate and thereby push the lifting plate away from the support plate. Furthermore, a pulling element with holding means is held on the lifting plate, which holds the cartridge case to be pulled out of the die on the lifting plate. If the lifting plate is now moved away from the support plate via the drive means, the die held on the support plate is also removed from the cartridge case held on the lifting plate. The lifting plate thus has a passive lifting function.

The pulling element with the holding means can comprise a thread as holding means, which is screwed into a case bottom of the cartridge case. In this way, the pulling element holds the cartridge case against the lifting plate and supports it there.

The two jacking screws for raising the jacking plate can be screwed in evenly, causing the jacking plate to move away from the support plate and pulling the cartridge case out of the die via the pulling screw in the case base. The die, in turn, is held in place on the support plate, as already explained. In this way, the tension element holding the cartridge case is functionally relieved, so that the power transmission to the case base can be configured in an optimal and trouble-free manner. Any existing drilling and minimum errors, such as a crooked hole, as well as material defects, quality problems only play a subordinate role. The specified device protects the matrix inside and outside. The support plate for holding the die can be made from simple and inexpensive materials.

An alternative, not belonging to the invention, to the above-mentioned lifting screws as drive means would be, for example, to simply press the support plate and the lifting plate apart with a vise. Alternatively, the backing plate could be held in a vise, with the jacking plate and backing plate then being forced apart using the jacking screws referred to above.

According to a further embodiment of the invention, the lifting plate and the support plate can be positioned relative to one another by means of guide columns, so that the plates cannot be rotated relative to one another and the handling of the die saver is facilitated in the fixed position of the plates. The lifting plate is displaceable along the guide columns relative to the support plate. Finally, it should also be pointed out that the screws for adjusting the distance between the plate and the lever plate can also be wing screws, so that the device can be operated without tools.

According to the invention, a device for pulling a cartridge case in a pulling direction from an axial bore of a die comprises an external thread on the outside as viewed from the axial bore for holding the die in a loading press comprises a support plate for holding the die aligned with its axial bore in the drawing direction and secured against movement in the drawing direction in a die bore, a lifting plate arranged at a distance in front of the support plate as seen in the drawing direction, on which a opposite to the pulling direction is arranged with holding means, the holding means being set up to hold the cartridge case at an end of the pulling element opposite the lifting plate, and drive means for driving the support plate and the lifting plate apart in and/or opposite to the pulling direction.

In a further development of the specified device, the holding means can comprise a thread which can be screwed into the cartridge case.

In an additional development of the specified device, the pulling element can be a screw with a screw head, which is screwed into the lifting plate in the opposite direction to the pulling direction.

According to the invention, the drive means comprise a jacking screw which is screwed in the pulling direction through the support plate and which is supported on the jacking plate, the jacking plate being movable in the pulling direction by screwing the jacking screw into the supporting plate, and a

seen from the jacking screw opposite to the die in the pulling direction, screwed through the supporting plate which is also supported on the jacking plate, the jacking plate being movable in the pulling direction by screwing the two jacking screws into the supporting plate.

In a further development of the specified device, the distance between the two jackscrews and the die bore can be the same as seen at right angles to the pulling direction.

In yet another further development of the specified device, at least one jacking screw or all jacking screws can be wing screws. As an alternative or in addition, the lifting screw or also all of the lever screws can be aligned in the guide direction.

In yet another further development of the specified device, the two lifting screws and die hole can be arranged along a straight line in a plan view of the support plate and the lifting plate in the pulling direction.

In an additional development, the specified device can include a lock nut that can be screwed onto the external thread of the die in order to fix the die on the support plate. In this case, the lock nut can optionally be arranged on a side of the support plate facing away from the lifting plate.

In a further additional development of the specified device, the support plate and the lifting plate can be held out against one another in the pulling direction.

In a preferred development of the specified device, the guide can comprise at least one linear rail on which the lifting plate and the support plate are held so that they can be displaced in relation to one another. Particularly preferably, the guide can include at least four linear rails, which are arranged point-symmetrically to the die bore. At least one linear rail can be attached to the support plate or the lifting plate.

• Figur 1 eine Vorrichtung zum Ziehen einer Patronenhülse aus einer Matrize gemäß einem ersten Ausführungsbeispiel;
• Figur 2 eine Vorrichtung zum Ziehen einer Patronenhülse aus einer Matrize gemäß einem zweiten Ausführungsbeispiel;
• Figur 3 eine Vorrichtung zum Ziehen einer Patronenhülse aus einer Matrize gemäß einem dritten Ausführungsbeispiel;
• Figur 4 eine Vorrichtung zum Ziehen einer Patronenhülse aus einer Matrize gemäß einem vierten Ausführungsbeispiel; und
• Figur 5 eine Draufsicht auf die Vorrichtung der Figur 4.

The invention is explained in more detail below using exemplary embodiments in connection with the drawing. It shows:

• figure 1 a device for drawing a cartridge case from a die according to a first embodiment;
• figure 2 a device for drawing a cartridge case from a die according to a second embodiment;
• figure 3 a device for drawing a cartridge case from a die according to a third embodiment;
• figure 4 a device for drawing a cartridge case from a die according to a fourth embodiment; and
• figure 5 a top view of the device figure 4 .

The same reference symbols in the individual figures designate the same parts and are only described once.

figure 1 shows a device 2 for drawing a cartridge case 4 from a die 6, as for example from the DE 10 2013 020 748 B3 is, according to a first embodiment. Such matrices 6 are used in the field of shooting and hunting when refilling empty cartridges in loading presses and are well known per se. A more detailed description of the structure of the matrix 6 should therefore be dispensed with.

In a manner known per se, the die 6 has a central axial bore into which a cartridge case 4 can be pressed for trimming and calibrating. However, if the cartridge case 4 gets stuck in the central bore and can no longer be easily pulled out, the die 6 with the cartridge case 4 stuck in it is unusable. The base 8 of the cartridge case 6 generally protrudes from the die 6 so that the base 8 of the die 6 protrudes. This is where the device 2 described below comes into play with the idea of rescuing such a die 6 by pulling out the cartridge case 4 stuck in it in a pulling direction 10 .

The device 2 has a support plate 12 arranged normal to the pulling direction 10 and a lifting plate 14 arranged normal to the pulling direction 10, both of which are arranged at a predetermined plate spacing 16 from one another as seen in the pulling direction 10.

The support plate 12 has a die bore 18 running in the pulling direction 10 with an internal thread not shown in the figures, into which the die 6 can be screwed with an external thread 20 which is formed on the die 6 in a manner known per se. The die 6 is screwed into the support plate 12 with the bottom 8 of the cartridge case 4 directed towards the lifting plate 14 . The die 6 in a state screwed into the support plate 12 according to this specification is shown in the figures.

The lifting plate 14 has a tension screw bore 22 running in the direction of tension 10 with an internal thread which is also not shown in the figures. A tension screw 24 arranged concentrically to the external thread 20 of the die 6 is screwed into this tension screw hole 22 counter to the direction of tension 10 . An end of the tension screw 24 viewed against the direction of tension 10 is also screwed into the base 8 of the cartridge case 4 . For this purpose, if the tension screw 10 is not designed as a corresponding tapping screw, a corresponding bottom bore 26 can be formed or cut through the bottom 8 of the cartridge case 4 in advance. The pulling screw 24 is used as a pulling means for pulling the cartridge case 24, a holding means in the form of a screw thread being formed on the pulling means. A gripper, for example, can be used as an alternative means of traction.

In order to be able to screw the tension screw 22 to the lifting plate 14 , the tension screw can have a screw head 28 at its end opposite the cartridge case 4 . In an analogous manner, a lock nut 30 can be screwed onto its external thread 20 and braced against the support plate 12 in order to increase the mechanical retention of the die 6 .

In the manner described above, the support plate 12 and the lifting plate 14 are mechanically held against one another via the die 6 and the cartridge case 4 held therein. To the To pull the cartridge case 4 out of the die 6 in the pulling direction 10, the support plate 12 and the lifting plate 14 only have to be moved apart in or against the pulling direction 10, which could be done with suitable drive means, such as a vice, not shown in detail.

In the present embodiment, the drive means is embodied with a first jacking screw 32 and a second jacking screw 34 threaded respectively through a first jacking screw hole 36 and a second jacking screw hole 38 through the support plate 12 in the pulling direction 10 . The two jacking screws 32, 34 are arranged in a point-symmetrical manner with the die bore 18 as the center of symmetry with respect to one another.

The lifting screws 32, 34 are screwed into the support plate 12 to such an extent that a front end seen in the pulling direction 10 touches the lifting plate 14. In this state, the lifting plate 14 can be removed from the support plate 12 by screwing the jacking screws 32, 34 further into the jacking screw bores 36, 38, so that the above-mentioned plate spacing 16 increases and the cartridge case 4 is pulled out of the die 6. Thumbscrews should preferably be used as the jackscrews 32, 34 because they can be operated without a wrench. However, it is not necessary, so the jackscrews 32, 34 can also be designed with screw heads 35, which are moved with a suitable wrench.

When using the device 2 to pull the cartridge case 4 out of the die 6, the support plate 12 should always be as parallel as possible to the lifting plate 14 in order to avoid tilting of all the screws acting in the device 2. On the one hand, this is ensured by the above-mentioned point-symmetrical arrangement of the jacking screws 32, 34, so that the jacking screws 32, 34 and the die bore 18 are arranged on a common line as seen in a plan view of the device 2 in the pulling direction 10 are. However, the aforementioned lock nut 30 also effectively avoids canting as an alternative or in addition.

In the device 2 according to the embodiment of figure 2 the lock nut 18 is omitted as an example. This is easily possible because the die 6 is positively guided with its external thread 20 in the internal thread 6 of the support plate 5 in the pulling direction and is also fixed if the pitch of the external thread 20 is sufficiently low.

In the device 2 according to figure 3 the jackscrews 32, 34 are screwed into the lever plate 14 counter to the pulling direction 10. Although the device 2 can figure 3 not so easy to set up on a base such as a table, although the die 6 does not interfere with the turning of the jackscrews 32, 34. The selection of the execution of the device 2 according to 2 or 3 should be application dependent.

In the figures 4 and 5 is a further development of the device 2 based on the device 2 of FIG figure 3 shown. The development shown can, however, also readily in the devices 2 of figures 1 and 2 to implement.

In the device 2 of figures 4 and 5 1, the lifting plate 14 is held relative to the support plate 12 by a guide independent of the aforesaid screws. The guide includes four linear rails, which are designed as four guide columns 40 in the present embodiment. Each guide column 40 has a hexagonal head 42 at its front and rear end, seen in the pulling direction 10 , which can either be designed in one piece with the guide column 40 or screwed onto the guide column 40 as a nut. Viewed in relation to the die bore 18 , the guide columns 40 are arranged point-symmetrically to one another.

The guide columns 40 can be fixed to the support plate 12 or the lifting plate 14 , while the corresponding other lifting plate 14 or support plate 12 can slide along the guide columns 40 . Although in the Figures 1 to 3 not shown, guide columns 40, as already mentioned, can also be installed in these exemplary embodiments.

In use, the device 2 can be used, for example, as follows:
First, the bottom hole 26 is drilled into the bottom 8 of the cartridge case 4 fixed in the die 6 . A thread is then cut into the bottom bore 26 of the cartridge case 2 with a tap. Thereafter, the tension screw 24 is guided through the tension screw hole 22 of the lifting plate 14 and screwed into the cut thread of the bottom hole 26 of the cartridge case 2 . Then the two jackscrews 32, 34 in the corresponding jackscrew bores 36 either on the support plate 12 in the figures 1 and 2 or on the lifting plate 14 in the Figures 3 and 4 screwed in and the die 6 is stabilized with its external thread 8 in the die bore 8 . Here, the support plate 12 can preferably be fixed in a vise. Then the two jacking screws 32, 34 are screwed in evenly so that they rest on the jacking plate 14 in figure 1 and 2 or the support plate 12 in 3 and 4 support and move the lifting plate 14 away from the support plate 12 in and/or counter to the pulling direction 10. As a result, the cartridge case 4 is pulled out of the die 6 by the tension screw 24 . Once the cartridge case 4 has been freed from the die 6, the tension screw 24 is removed from the bottom 8 of the cartridge case 4 and the die 6 can be reused.

In short, the invention thus provides a simple way of removing stuck cartridge cases from a die.

Claims (13)

1. Device (2) for drawing a cartridge case (4) in a drawing direction (10) from an axial bore of a die (6), which, as seen from the axial bore, has an external thread (20) on the outside for holding the die (6) in a loading press, comprising:

   - a support plate (12) for holding the die (6) aligned with its axial bore in the pulling direction (10) and secured against movement in the pulling direction (10) in a die bore (18),

   - a lifting device (14) arranged at a distance (16) in front of the support plate (12) as seen in the pulling direction (10), on which lifting device (14) a pulling element (24) with holding means is arranged, which pulling element (24) is aligned opposite the pulling direction (10), the holding means being arranged to hold the cartridge case (4) at an end of the pulling element (24) opposite the lifting device (14), and

   - drive means (32, 34) for driving the support plate (12) and the lifting device (14) apart in and/or against the direction of pull (10), wherein the lifting device (14) is a lifting plate standing parallel to the support plate (12), characterized in that the drive means (32, 34) comprise a lifting screw (32, 34) which is screwed through the supporting plate (12) or the lifting plate (14) in the direction of traction (10) and which is correspondingly supported on the lifting plate (14) or the supporting plate (12), the lifting plate (14) or the supporting plate (12), respectively, being driven by screwing the lifting screw (32, 34) into the supporting plate (12), 34) into the supporting plate (12) or the lifting plate (14), respectively, the lifting plate (14) or the supporting plate (12), respectively, being movable in the pulling direction (10) by screwing the lifting screw (32, 34) into the supporting plate (12) or the lifting plate (14), respectively, the drive means (32, 34) comprising, viewed from the lifting screw (32, 34) opposite the die (6), a further lifting screw (34, 34) which is screwed through the supporting plate (12) or the lifting plate (14) in the pulling direction (10), 32) which is supported on the lifting plate (14) or the supporting plate (12), the lifting plate (14) or the supporting plate (12) being movable in the pulling direction (10) by screwing the two lifting screws (34, 32) into the supporting plate (12) or the lifting plate (14).
2. Device (2) according to claim 1, wherein the retaining means comprise a thread which can be screwed into the cartridge case (4).
3. Device (2) according to claim 1 or 2, wherein the pulling element (24) is a screw with a screw head which is screwed into the lifting plate (14) against the pulling direction.
4. Device (2) according to one of the claims, wherein a distance of both lifting screws (32, 34) from the die bore (6) as seen at right angles to the pulling direction (10) is equal.
5. Device (2) according to any one of the preceding claims, wherein the lifting screw (32, 34) is a wing screw.
6. Device (2) according to any one of the preceding claims, wherein the lifting screw is aligned in the pulling direction (10).
7. Device (2) according to any one of the preceding claims, wherein the two lifting screws (32, 34) and die bore (6) are arranged along a straight line in a plan view of the support plate (12) and the lifting plate (14) in the pulling direction (10).
8. Device (2) according to any one of the preceding claims, comprising a lock nut (30) screwable onto the external thread of the die (6) for fixing the die (6) to the support plate (12).
9. Device (2) according to claim 8, wherein the lock nut (30) is arranged behind the support plate (12) as seen in the direction of pull (10).
10. Device (2) according to one of the preceding claims, wherein the support plate (12) and the lifting plate (14) are held (40) guided against each other in the pulling direction (10).
11. Device (2) according to claim 10, wherein the guide (40) comprises at least one linear rail on which the lifting plate (14) and the supporting plate (12) are held so as to be displaceable relative to one another.
12. Device (2) according to claim 10 or 11, wherein the guide (40) comprises at least four linear rails which are arranged point-symmetrically with respect to the die bore (6).
13. Device (2) according to claim 11 or 12, wherein at least one linear rail is fixed to the support plate (12) or the lifting plate (14).

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