JPS609994B2 - Method for manufacturing cut-tube propellant - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a split tubular propellant in which "slits" are formed in the longitudinal direction.

This cut-tube propellant is generally used in tank guns, rocket guns, and other various guns, and is made by forming a single ``cut'' into a normal single-tube propellant. By forming this, the firing area of the tubular drug is widened, and the difference in combustion pressure and combustion speed between the inside and outside of the tube is eliminated. (Hereinafter, the cut-tube propellant is simply referred to as the cut-tube propellant). An object of the present invention is to provide a method for producing a large amount of split tubular drugs in a short period of time using molding dies of various shapes.

A first aspect of the present invention is a method for manufacturing a cut tube-shaped propellant by a drawing method, in which the forming die la is composed of a composite pin plate 9 and a die body 2a.

(2) The composite pin plate 9 is formed from a composite pin 12 and a medicine receiving plate 10.

'3} Composite pin 12 consists of inner hole forming pin 13 and split pin 1
4, and the composite pin 12 is integrated at one longitudinal side surface of the inner hole forming pin 13 and the longitudinal thin surface 25 of the split pin 14.

[4- The composite pin plate 9 is formed so that the center of the inner hole forming pin 13 on the cut surface 21 of the composite pin 12 coincides with the center of the cut surface 20 of the medicine receiving plate 10, and the two are integrated.

'51 The die body 2a shall have a shallow groove 8 formed in the length direction of the inner surface of the tube outer molding hole 3a.

{6' The forming die la is such that the composite pin plate 9 is set in the die body 2a by sliding the cutting pin tip 15 of the composite pin plate 9 into the shallow groove 8 of the die body 2a. A second invention is a method for producing a cut tube-shaped propellant, in which the forming die la is set in a drawing device, and a restraining agent is drawn into a cut tube shape. In the manufacturing method of '
1} The molding die lb consists of a die body 2b or a die body 2b and a medicine receiving plate 10. [2
1. The die main body 2b is integrated at one longitudinal side of the tube outer molding hole 3b and the cutting pin tip 15 of the composite pin 12.

'3- Composite pin 12 consists of inner hole forming pin 13 and split pin 1
4, and the composite pin 12 is integrated at the -side surface in the longitudinal direction of the inner hole forming pin 13 and the thin longitudinal surface 25 of the split pin 14.

A third aspect of the present invention is a method for producing a cut tube-shaped propellant, in which the forming die lb consisting of the above-mentioned molding die lb is set in a drawing device and a restraining agent is drawn into a cut tube shape. In the manufacturing method, [1] The molding die lc consists of a die body 2c or a die body 2c and a medicine receiving plate 10.

[2' The die main body 2c has a plurality of independent tube outer shell forming holes 3c, and the cutting pin tip 15 of the composite pin 12 is fixed to one side in the length direction of each of the tube outer shell forming holes 3c. The two are integrated.

'3' Composite pin 12 includes inner hole forming pin 13 and split pin 1
4, and the composite pin 12 is integrated at the -side surface of the inner hole forming pin 13 in the longitudinal direction and the longitudinal covering surface 25 of the split pin 14.

A fourth invention is a method for producing a cut tube-shaped propellant, in which the forming die lc consisting of the above-mentioned molding die lc is set in a drawing device and a restraining agent is drawn into a cut tube shape, and a fourth invention is a method for producing a cut tube-shaped propellant by a drawing method. In the manufacturing method of '11, the molding die ld consists of a die body 2d or a die body 2d and a medicine receiving plate 10.

[2} The die body 2d has a plurality of tangentially connected tube outer forming holes 3d, and the split pin tip 15 of the composite pin 12 is fixed to one side in the length direction of each tube outer forming hole 3d. The two are integrated in form.

'3' Composite pin 12 includes inner hole forming pin 13 and split pin 1
4, and the composite pin 12 is integrated at one longitudinal side surface of the inner hole forming pin 13 and the longitudinal thin surface 25 of the split pin 14.

In this method, the forming die ld consisting of the above-mentioned molding die ld is set in a drawing device, and the compressed material is stretched to form a plurality of molding charges whose outer surfaces are tangentially joined.

The drawings are perspective views and cut-away perspective views showing various forms of forming dies, drawing devices, and forming agents used to carry out the present invention.

Fig. 1 is a cutaway perspective view showing an assembled view and an exploded view of a forming die la used in the first invention of the present invention, Fig. A is a perspective view showing a composite pin plate 9, and Fig. A cutaway perspective view, Figure C is a cutaway perspective view showing a state in which the composite pin plate 9 shown in Figure A is set in the die main body 2a shown in the opening view, that is, the forming die la. Figure 2 is the second
FIG. 3 is a cutaway perspective view showing forming dies lb, lc, and ld used in the third invention, and FIG. 4 is a cutaway perspective view showing forming dies lb, lc, and ld used in the fourth invention, respectively.

Figure 5 shows the plate support part 4 in Figure 2 and Figure 3 and Figure 4.
FIG. 6 is a partially cutaway perspective view of the drawing device, and FIG. 7 is a perspective view of the receiving plate 10 set in the first
Inner hole forming pin 1 of various forming dies shown in figures to figures 4
FIG. 3 is a perspective view of various shapes of cut-tube drugs that can be molded by changing the shapes of tube shell forming holes 3 and 3; A first aspect of the present invention is a method for manufacturing a cut tubular drug 17 using a forming die la shown in FIG.
Figure A shows the composite pin plate 9 shown in Figure A set in the die main body 2a shown in the Figure, and Figure C shows the set state.

The composite pin plate 9 shown in FIG. The inner 0-hole molded pin 13 and the split pin 14 are integrated to form a composite pin 12, and the composite pin 12 is further integrated with the medicine receiving plate 10. The drug receiving plate 1 of this composite pin plate 9 is a disc that can be detached from the plate support portion 4 of the die body 2a, and is generally provided with a plurality of drug press insertion holes 11. Further, the inner hole forming pin 13 in this composite pin plate 9 is a pin for forming an inner hole of the forming agent, and the cutting pin 14 is a pin for forming an inner hole of the forming agent as shown in FIGS. 6 and 7.
This pin is used to form the cut portion 18 of No. 7, and pins having various thicknesses are used depending on the cutting process of the cut portion 18 in the molding compound 17. However, if the thickness of the split pin 14 is made extremely thin, the split pin 14 will be cracked, destroyed, deformed, etc. due to the unevenness of the chemical pressure, making it impossible to mold the molding compound 17.

Conversely, if the thickness of the split pin 14 is increased, a molding compound with a U-shaped or semicircular cross section can be obtained.
The thickness of the split pin 14 to obtain a split tubular drug with an effective firing area is determined by the diameter of the inner hole forming pin 13, preferably from 1 to 3. A range of is good. This composite pin 1
2 is formed by integrating one longitudinal side surface of the inner hole forming pin 13 and the longitudinal thin surface 25 of the split pin 14, and this composite pin 12 is further integrated with the medicine receiving plate 10. The composite pin plate 9 shown in FIG.
The center of the inner hole forming pin 13 in the medicine receiving plate 1
The two are integrally formed so as to coincide at the center of the cut surface 20 of 0.

Integration of the inner hole forming pin 13 and cutting pin 14 in this compound pin 12, that is, the formation of the compound pin 12, or integration of the compound pin 12 and the medicine receiving plate 10 in the compound pin plate 9, that is, the formation of the compound pin 12, or the integration of the compound pin 12 and the drug receiving plate 10 in the compound pin plate 9 For example, they may be formed by directly molding them from the same material, or they may be joined by welding means such as silver solder, or they may be integrated by screwing.

The die main body 2a shown in the drawing is a molded part that forms the outer shell of the molding agent 17, and in the center of the rear end 6 of the die in the die main body 2a, there is a tube outer contour forming hole 3a that determines the outer shape of the molding agent 17. is penetrated in the length direction of the die body 2a. Furthermore, this tube outer molding hole 3a has “
A shallow groove 8 into which the split pin tip 15 of the composite pin plate 9 can fit and slide is formed in the length direction of the inner surface of the tube outer molding hole 3a. The shallow groove 8 formed in the tube outer molding hole 3a is for fixing the cutting pin tip end groove 5 of the composite pin plate 9, and by fixing the pin tip end 15 to the shallow groove 18, Composite pin plate 9 connects tube outer molding hole 3
rotational movement in the circumferential direction of a can be prevented. If the tube outer molding hole 3a does not have a shallow recess 18, when the pressure of the press-fitting drug is strongly applied to either side of the split pin 14 in the compound pin plate 9, the compound pin plate 9 The molding agent 17 tries to rotate to the side where the pressure is weaker, and as a result, the drawn and ejected forming agent 17 becomes "twisted," causing the cut portion 18 to become "jiggly" or even to be crushed. ``The composite pins 12 and split pins 14 of the composite pin plate 9 become 'twisted' or fall off, making them unusable. As described above, by providing the shallow groove 18 in the tube outer molding hole 3a and fixing the split pin 14, the composite pin plate 9 does not rotate, and the both sides of the split pin 14 are coated with an equal amount of powder. Pressure is applied, and a straight cut and molded drug 17 is obtained. As described above, the setting of the shallow groove 8 is an important requirement in the first invention.
The depth of the shallow groove 8 may be about 1 to 2 inches; if it is made too deep, there is no point in making it too deep, and the strength of that part of the die body 2a will be reduced. Also, this die body 2a
A plate support portion 4 that supports a drug receiving plate 10 is provided inside the front end 5 of the die, and a cup-shaped press-fit drug is inserted from the rear end of the plate support portion 4 toward the tube outer molding hole 3a. A confluence section 7 is formed.

Further, the die main body 2a has a die supporting portion 1 of the die holder 104 in the Sho elongation forming apparatus 1011 shown in FIG.
A die holding section 16 supported by 05 is provided.
As shown in Figure C, a composite pin plate 9 is set in the die main body 2a configured in this way to form a forming die la.

In this set, the splitting pin tip 15 of the composite pin plate 9 is slid along the shallow groove 8 provided in the tube outer molding hole 3a of the die body 2a, and the drug of the composite pin plate 9 is slid. The receiving plate 10 is fitted into the plate support part 4 of the die main body 2a.The molding die la set in this way is further set in the die holder 104 in the cylinder 102 of the molding apparatus 101 shown in FIG. A counterweight is charged into the cylinder 102 and the piston 103 is operated.

The retaining material pressed by the piston 103 is press-fitted through the drug press-fitting hole 11 of the drug receiving plate 10 in the forming die la to become each rod-shaped press-fitted drug, and the rod-shaped press-fitted drug is press-fitted into the press-fitted drug confluence section 7 of the die body 2a. , they join together to form a group of suppressive agents again, and this suppressive agent is further molded by filling the gap between the tube outer molding hole 3 and the composite pin 12, and the desired cut tube-shaped molded product is formed in the die body 2a. The molding agent 17 comes out from the rear under pressure. This shaped drug 17 is cut into a predetermined length, and subjected to air exposure and drying steps to obtain the desired cut-tubular drug.

FIG. 2 is a cutaway perspective view showing the molding die lb used in the second invention of the present invention, and the molding die lb has a composite pin plate shown in FIG. Only the composite pin 12 in 9 is integrated into the tube outer molding hole 3b, and a drug receiving plate 10 shown in FIG. 5 is further set.

The composite pin 12 integrated into the tube shell forming hole 3b in the forming die lb shown in FIG. 2 is formed in the same manner as the compound pin 12 shown in FIG. The composite pin 12 is integrated at one longitudinal side of the tube outer molding hole 3b and the cutting pin tip 15 of the composite pin 12.

In integrating the composite pin into the tube outer molding hole 3b,
In the tube outer molding hole 3b, a deeper "groove" similar to the shallow groove 8 formed in the die body 2a in FIG. It is best to join by fitting or welding such as silver solder. Alternatively, it is also possible to directly process the die body material into such a shape and integrally form it. The length of the composite pin 12 integrated into the tube outer molding hole 3b can be any length within the length range of the tube outer molding hole 3b, but In order to obtain the drug 17, it is desirable to use a tube having the same length as the tube outer molding hole 3b. The drug receiving plate 10 shown in FIG. 5 is set on the die main body 2b shown in FIG. 2 and used as the forming die lb, but it is possible to use only the die main body 2b as the forming die lb without using the drug receiving plate 10. I can do it. As in the previous example, this molding die lb is set in the drawing device 101 shown in FIG.
The desired cut-tube drug is obtained through each step of drying.

Furthermore, the third invention aims to provide a method for manufacturing a large amount of cut tube-shaped drugs in a short time by simultaneously molding a plurality of molded drugs 17, using a molding die lc shown in FIG. Achieved by

This molding die lc consists of a die main body 2c and a drug receiving plate 10, and the drug receiving plate 10 shown in FIG. 5 is set on the die main body 2c.

A plurality of independent tube shell forming holes 3c are formed in the die main body 2c of this forming die lc, and a split pin of the composite pin 12 is formed on one side in the length direction of each tube shell forming hole 3c. The tip 15 is fixed, and both the tube outer molding hole 3c and the composite pin 12 are integrated.

The molding die lc used in the third invention, that is, the molding die lc shown in FIG. The only difference between the two is the number of tube outer forming holes 3 formed, and the shape, forming means, and integration means of the composite pin 12 integrated into the tube outer forming hole 3c are as shown in Fig. 2. Everything is the same as in the case of the forming die lb in the example, and the die body 2c of this forming die lc can also be directly formed from its forming material into a shape in which the composite pin 12 is integrated into the tube outer molding hole 3c. .

The die main body 2c formed by these various means is set with the drug receiving plate 10 to form a forming die lc, and is placed in the drawing device 101 shown in FIG. 6 as in the first and second inventions. A die lc is set to draw and mold the incompatible drug, and the obtained molded drug 17 is cut, air-bleached, and dried to obtain the desired cut-tubular drug.

Furthermore, a fourth aspect of the present invention provides a method for producing a composite cut-tubular drug having a shape in which a plurality of cut-tube-shaped compounds are joined to each other at tangents to their outer shells.

FIG. 4 is a perspective view and a plan view showing the rear end of the molding die ld for forming the composite cut-tubular molding compound 17d, and the die main body 2d of the molding die ld.
has a plurality of tube outer molding holes 3d, and the tube outer molding holes 3d are tangentially joined to each other on one side of the outer periphery. (Tangential joining means that one side surface in the length direction of each tube outer molding hole 3d in the molding die ld, or the outer surface in the length direction of each molding agent 17d, is joined to each other at the tangent line.) The cutting pin tip of the compound pin 12 is fixedly integrated with one longitudinal side of each tube outer molding hole 3d of the die body 2d.

The composite pin 12 integrated into this tube outer molding hole 3d is
It is formed in the same manner as the composite pin 12 of the molding die in FIGS. 1, 2, and 3, and its tube outer molding hole 3d
The composite piston 12 is also integrated by the same means applied to the forming die shown in FIGS. 2 and 3. Further, the die main body 2d of the forming die ld can be directly formed from its forming material into a shape in which the composite pin 12 is integrated into the tube outer shell forming hole 3d. The die main body 2d formed by these various means is set as a forming die ld by setting the drug receiving plate 10 shown in FIG. is set to draw and form the suppressive drug, and the obtained molded drug 17d is cut, air-bleached, and dried to obtain the desired cut-tubular drug.

In addition, since the molding dies lc and ld used in the third and fourth inventions mold a plurality of molding agents, the size of the molding dies is such that the number of tube outer molding holes 3c and 3d increases. It gets bigger every time.

Therefore, when the forming dies lc, ld are set in the drawing apparatus 101 shown in FIG. 6, the die holder 104 may be replaced with one of a size matching the forming dies lc, ld. This molding die lc, ld
is used by setting the drug receiving plate 10 on the die bodies 2c and 2d, but these forming dies lc and l
d can also be used without setting the medicine receiving plate 10 and using the die bodies lc and ld as they are. FIG. 7 is a diagram showing examples of cut-tube drugs of various shapes. This can be obtained by processing the shape of the tube outer molding hole 3 to match the outer shape and inner hole shape of the cut tube-shaped drug.

Next, examples of this invention will be shown.

Example 1 A propellant composition 10k9 having the following composition was charged into a restraining machine,
A mixed solvent consisting of 55% ethanol and 45% acetone was added in an amount of 24% by weight based on the propellant composition, and the mixture was sealed at 37q0 for 5 hours to abate.

This suppressant was drawn and formed under a drawing pressure of 40k9/base using a drawing machine equipped with the following forming die. Propellant composition 3 Nitrocellulose (nitrogen content 13.15%) 54.1% Nitroglycerin 35.5% Ethyl centralite 1.6% Potassium perchlorate 7.6% Carbon black 1.2% Magnesium trioxide ( 0.5% magnesium stearate (relative to potassium perchlorate)
The 0.5% molding die is the first
I used one with the structure shown in the figure and a size similar to Tsujiko.

Length of the die body Length from the front end of the 43 willow die to the die holder Diameter of the front end of the 17 side die Length from the rear end of the 3 side die to the die holder Diameter of the rear end of the 26 willow die
14.5 Diameter of side pipe outer molding hole
5. Length of the narcissistic tube outer molding hole
Diameter of 26-hole forming pin
2. Length of proboscis inner hole forming pin
Length of 26 side split pin
Inside the 38 skin cutting pin
2.5 side split pin thickness
1. In the shallow groove
1. The depth of the enemy's shallow groove 1
．． Diameter of revenge plate 24
Thickness of the willow receiving plate 5 Diameter of the injection hole 4 Number of side injection holes 5 The composite pin consisting of the internal hole molded pin and the split pin was fabricated from the same material and integrated by welding with silver solder.

In addition, the composite pin is inserted perpendicularly into a pre-drilled hole in the drug receiver plate so that the center of the inner hole molded pin is the center of the plane of the drug receiver plate, and is welded with silver solder to integrate the compound pin plate. - Formed.

The molding agent drawn and molded using the above-mentioned drawing device was cut into 7 pieces and exposed to the wind at room temperature for 2 hours.
It was dried for 4 hours in a constant temperature room.

As a result of conducting a combustion test using a closed pump for this desiccant, desired test results were obtained. Example 2 Draw molding was carried out using a molding die having the structure shown in FIG.

The molding die used was the same shape and size as that used in Example 1. However, the composite pin had the same length as the tube outer molding hole, and the tip of the pin was embedded in the shallow groove of the tube outer molding hole and welded with silver solder to integrate it. In addition, the same suppressive drug used in Example 1 was used. The above-mentioned molding die was set in a drawing device, and the compensating agent was drawn and formed in the same manner as in Example 1, and then cut and
Wind exposed and dry.

A combustion test was conducted on this desiccant using a closed pump, and the same test results as for the desiccant in Example 1 were obtained. Example 3 Drawing molding was carried out using a molding die having the structure shown in FIG.

The sizes of the molding dies are as follows. Length of the die body Length from the front end of the 43 rib die to the die holder Diameter of the front end of the 17 skin die
Length from the rear end of the 4-ring die to the die holding part Diameter of the rear end of the 26-rib die
Diameter of 19 holes
5. Length of auxiliary hole
2 Length from the front end of the lateral forming hole to the die holding part 11 Inner diameter of the auxiliary hole front end forming part
Length of 1 kalpa compound piso
Shape of the two-pronged composite pin Same as that in Example 2 This above-mentioned forming die was set in the drawing device shown in Fig. 5, and the same operation as in Example 1 was carried out. The medicine was drawn, cut, air-bleached, and dried.

As a result of conducting a combustion test using a closed pump for this dry medicine, desired test results were obtained. Example 4 Drawn molding was carried out using a molding die having the structure shown in FIG.

The size of the molding die was the same as that used in Example 3. However, the molding holes were processed into a tangential joint type with three holes. In addition, the same suppressive drug used in Example 1 was used. The above-mentioned molding die was set in the drawing apparatus shown in FIG. 5, and the incompatible drug was drawn in the same manner as in Example 1, cut, air-bleached, and dried.

As a result of conducting a combustion test using a closed pump for this dry medicine, desired test results were obtained. As described above, the present invention has an extremely great feature that it is possible to produce a large amount of cut tube-shaped drugs in a short time by using molding dies of various shapes.

The molding die of the present invention can be used to reuse molding dies that have been commonly used in the past, so there is no need to newly manufacture these molding dies, which has a great advantage.

[Brief explanation of the drawing]

FIGS. 1, 2, 3, and 4 are perspective views and cutaway views of a forming die used in each embodiment of the present invention, shown exploded and assembled. FIG. 5 is a perspective view of a drug receiving plate, FIG. 6 is a cutaway perspective view of a drawing device used to carry out each embodiment of the present invention, and FIG. 7 is a perspective view of a drug receiving plate. FIG. 4 is a perspective view of cut tubular propellants having various shapes that can be formed by changing the shapes of the inner forming pin and the tube outer forming hole of the forming die shown in FIG. 4; la, lb, lc, ld...molding die, 2a, 2b, 2c, 2d...die body, 3
a, 3b, 3c, 3d... Pipe outer shell forming hole, 4.
...Plate support part, 5...Dice front end, 6...
...Dice rear end, 7...Press-in medicine confluence section, 8...
... Shallow groove, 9... Composite pin plate, 10.
...Medicine receiving plate, 11...Medical pressure insertion hole, 12...Compound pin, 13...Inner hole forming pin L 14...Cut Pin, 15...
- Cutting pin tip, 16...Dice holding part, 17a,
17b, 17c, 17d...molding agent, 18...
Cutting portion, 20...Composite pin cutting surface, 21...
...Medicine receiving plate cut surface, 25..., split pin thin surface, 101...... Drawing forming device, 102...
...Cylinder, 103...Piston, 104...
...Dice holder, 105...Dice support part. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Scope of Claims] 1. In the method for producing a cut tube-shaped propellant by drawing, (1) the forming die 1a is composed of a composite pin plate 9 and a die main body 2a. (2) The composite pin plate 9 is formed from a composite pin 12 and a medicine receiving plate 10. (3) Composite pin 12 consists of inner hole forming pin 13 and split pin 1
4, and the composite pin 12 is integrated at one longitudinal side surface of the inner hole forming pin 13 and the longitudinal thin surface 25 of the split pin 14. (4) The composite pin plate 9 is formed so that the center of the inner hole forming pin 13 at the cut surface 21 of the composite pin 12 coincides with the center of the cut surface 20 of the medicine receiving plate 10, and the two are integrated. (5) The die body 2a has a shallow groove 8 formed in the longitudinal direction of the inner surface of the tube outer molding hole 3a. (6) The forming die 1a is such that the composite pin plate 9 is set in the die body 2a by sliding the cutting pin tip 15 of the composite pin plate 9 into the shallow groove 8 of the die body 2a. The forming die 1a consisting of
1. A method for producing a split tube-shaped propellant, which comprises setting the powder in a drawing device and drawing the kneaded powder into a split tube shape. 2
In the method for producing a cut tube-shaped propellant by the drawing method, (1) the forming die 1b consists of a die body 2b or a die body 2b and a drug receiving plate 10; (2) The die body 2b has one longitudinal side surface of the tube outer molding hole 3b and the cutting pin tip 1 of the composite pin 12.
5, the two are integrated. (3) Composite pin 12 consists of inner hole forming pin 13 and split pin 1
4, and the composite pin 12 is integrated at one longitudinal side surface of the inner hole forming pin 13 and the longitudinal thin surface 25 of the split pin 14. A method for producing a cut tube-shaped propellant, characterized in that the forming die main body 1b consisting of the above-mentioned forming die body 1b is set in a drawing device and the kneaded powder is drawn into a cut tube shape. 3. In the method for producing a cut tube-shaped propellant by drawing, (1) the forming die 1c is composed of a die body 2c or a die body 2c and a drug receiving plate 10; (2) The die body 2c has a plurality of independent tube outer shell forming holes 3c, and the split pin tip 15 of the composite pin 12 is fixed to one side in the length direction of each tube outer shell forming hole 3c. The two are integrated. (3) Composite pin 12 consists of inner hole forming pin 13 and split pin 1
4, and the composite pin 12 is integrated at one longitudinal side surface of the inner hole forming pin 13 and the longitudinal thin surface 25 of the split pin 14. A method for manufacturing a split tube-shaped propellant, characterized in that the forming die 1c comprising the above-mentioned forming die 1c is set in a drawing device to draw and form the kneaded powder into a split tube shape. 4. In the method for producing a cut tube-shaped propellant by drawing, (1) the forming die 1d consists of a die body 2d or a die body 2d and a drug receiving plate 10; (2) The die body 2d has a plurality of tangentially connected tube outer forming holes 3d, and the cutting pin and tip 15 of the composite pin 12 are fixed to one side in the length direction of each of the tube outer forming holes 3d. The two are integrated in a way. (3) Composite pin 12 consists of inner hole forming pin 13 and split pin 1
4, and the composite pin 12 is integrated at one longitudinal side surface of the inner hole forming pin 13 and the longitudinal thin surface 25 of the split pin 14. A method for manufacturing a cut tube-shaped propellant, characterized in that the forming die 1d comprising the above-mentioned forming die 1d is set in a drawing device to draw the kneaded powder and form it into a plurality of shaped powders whose outer surfaces are tangentially joined.