JPWO2007126075A1 - Flying fireworks - Google Patents

Abstract

A firework fireball with less unburned material falling after launching is provided. A hollow spherical ball skin formed from a gunpowder composition comprising 80-95% by weight black powder and 20-5% by weight binder, and a star disposed along the inner surface of the ball skin A firework fireball including a split medicine filled inside the position of the star, a lead wire drawn outward from the filling portion of the split medicine, and an upper paper covering the outer surface of the skin. [Selection] Figure 2

Description

  The present invention relates to a flying fireworks ball, and more particularly to a flying firework ball with less unburned material falling after being fired.

  FIG. 1 of the accompanying drawings is a cross-sectional view showing the structure of a typical typical firework fireball. As shown in FIG. 1, the firework fireball is configured by combining a hollow spherical ball skin 10 (the ball skin 10 is a combination of two hollow hemispherical molded bodies 10a and 10b formed into a hollow hemispherical shape, The hollow hemispherical molded bodies 10 a and 10 b are fixed to each other by the upper paper 14), the star 11 arranged along the inner surface of the ball skin 10, and the split medicine filled inside the position of the star 11. 12, It is comprised from the conducting wire 13 pulled out from the filling part of the split medicine 12 outside. The firework fireball having such a structure ignites the lead wire 13 simultaneously with the launching, and when the ignition reaches the split medicine in the air, the split medicine 12 burns and explodes and bursts the ball skin 10. Due to the rupture of the ball skin 10, the stars 11 scatter while emitting a color fire, and a flower pattern is drawn in the air by the tracks.

  Since the firework fireball is usually fired outdoors, it is preferable that there is little generation of unburned matter falling on the ground after the firework (after the explosion of the firework fireball). However, in the conventional firework fireball, the ball skin (hollow hemispherical molded body) is manufactured by overlapping the paper, so that it is difficult to burn, and many pieces of the ball skin tend to fall to the ground without being burned. It is in. In addition, as for the split medicine, those in which black powder or potassium perchlorate-containing explosive composition is applied around granular materials such as rice crackers and cotton seeds are widely used. The husks and cotton seeds of the core material are difficult to burn and unburned matter is easily generated. For this reason, it has been studied to reduce the generation of unburned material by forming the ball skin and split medicine of flaming fireworks from combustible materials and burning the ball skin and split medicine in the air.

  Patent Literature 1 discloses a combustible ball skin mainly composed of nitrocellulose and kraft pulp.

  Patent Document 2 discloses a spherical hollow medicine having a porous outer skin formed from a composition mainly composed of nitrocellulose and / or a deformation having a hollow portion whose specific gravity is increased by deforming the hollow medicine. A medicine for launching fireworks made of medicine is disclosed.

  Patent Document 3 discloses a tubular body formed from a potassium perchlorate-containing explosive composition and a split medicine on which the surface is deformed so as to be bulky.

Patent Document 4 discloses a split medicine comprising a core made of a lump of biodegradable plastic foam and an explosive layer covering the surface of the core.
Japanese Patent Laid-Open No. 2-195198 Japanese Patent No. 2-195199 JP 2002-277195 A JP 2002-350097 A

By using the combustible ball skin disclosed in Patent Document 1 and the combustible split medicine disclosed in Patent Documents 2 to 4, generation of unburned fireworks after launching It is possible to reduce it. However, the ball skin containing kraft pulp disclosed in Patent Document 1 has a problem in that the kraft pulp may ignite when the ball skin burns, which may impair the appearance of the firework flower pattern. . The splitting agent having a hollow part disclosed in Patent Document 2 has a problem that it is difficult to form a combustible material into a spherical hollow, and industrial productivity is low. Compared with the split medicine which applied the explosive composition which applied the explosive composition to the conventional core material, the powder of the explosive composition currently disclosed by patent document 3 is contacting strongly mutually. For this reason, there is a problem that it takes a long time for the whole of the split medicine to burn and explode after ignition, and the force generated by the combustion explosion of the split medicine is weak. That is, the firework fireball filled with the splitting powder disclosed in Patent Document 3 is more fireworks than the conventional fireworking fireball filled with the splitting powder in which the explosive composition is applied to the core material. The flower pattern tends to be smaller. In the split medicine disclosed in Patent Document 4, there is a problem that the adhesion between the core material and the explosive layer is low, and the explosive layer may fall off the core material.
Accordingly, it is an object of the present invention to provide a novel fireworks ball that generates less unburned matter after launching without impairing the flower pattern of fireworks.

  The present invention relates to a hollow spherical ball skin formed from a gunpowder composition containing 80 to 95% by weight of black powder and 20 to 5% by weight of a binder, and a star disposed along the inner surface of the ball skin. And a fireworks fireball including a splitting agent filled inside the star position, a lead wire drawn out from the filling portion of the splitting agent, and an upper paper covering the outer surface of the ball skin.

The preferable aspect of the fireworks ball of the present invention is as follows.
(1) The binding agent for the skin is a polysaccharide.
(2) The gauze binder is a gauze.
(3) The thickness of the hull is in the range of 1 to 10% with respect to the inner diameter of the hull.
(4) Black powder particles are scattered on the inner surface of the ball skin.

(5) A split medicine is formed from spherical porous polymer beads having an average particle diameter of 1 to 5 mm having a hydrophilic adhesive coating layer on the surface, and an explosive layer covering the surface of the hydrophilic adhesive coating layer. Has been.
(6) The split adhesive hydrophilic adhesive coating layer is formed from a polyvinyl alcohol-containing adhesive or a vinyl acetate resin-containing adhesive.
(7) The split adhesive hydrophilic adhesive coating layer contains black powder.
(8) The split polymer porous polymer beads are expanded polystyrene beads.
(9) The explosive composition which forms the explosive layer of the split medicine contains an explosive composition containing potassium perchlorate.

  Most of the skin used in the firework fireball of the present invention is made of black powder, so it is easily ignited by the burning of the split powder, and the combustion speed after ignition is extremely fast. There is almost no flame. Therefore, in the firework fireball of the present invention using this ball skin, the ball skin is almost burned out in the air without impairing the appearance of the firework flower pattern, and the unburned material fall caused by the unburned ball skin Hardly occurs.

  A spherical porous polymer bead having an average particle diameter of 1 to 5 mm and having a hydrophilic adhesive coating layer on the surface, which is preferably used in the firework fireball of the present invention, and the surface of the hydrophilic adhesive coating layer The split agent formed from the explosive layer has a fine spherical porous polymer bead as a core material, and has a very fast burning rate after ignition. Therefore, the fireworks fireball using this split medicine is almost completely burned down in the air, so that almost no unburned material falls due to the split medicine. The split medicine using spherical porous polymer beads as the core material has high industrial productivity because the composition other than the core material is equivalent to the split medicine in which the explosive composition is applied to the conventional core material. Further, the time required from the ignition to the explosive explosion of the explosive layer and the force generated by the explosive explosion of the explosive layer are equivalent to those of the conventional split medicine in which the explosive composition is applied to the core material. Furthermore, since the explosive layer covers the spherical porous polymer beads via the hydrophilic adhesive coating layer, the explosive layer is unlikely to fall off the spherical porous polymer beads.

Hereinafter, the fireworks ball of the present invention will be described with reference to the accompanying drawings.
FIG. 2 is a cross-sectional view of an example of a firework fireball according to the present invention, and FIG. 3 is an enlarged cross-sectional view of the firework ball of the firework fireball shown in FIG. However, FIG. 3 shows an example in which black explosive particles are arranged in the form of dots on the inner surface of the ball skin. FIG. 4 is a diagram schematically showing a mold composed of a female mold and a male mold that can be advantageously used in the production of a hollow hemispherical molded body that forms the ball of the fireworks ball of the present invention. is there. Furthermore, FIG. 5 is a cross-sectional view of an example of a split medicine that can be advantageously used for the flying fireworks of the present invention.

  In FIG. 2, the firework fireball includes a hollow spherical ball skin 20 formed of a gunpowder composition containing a black powder and a binder, a star 21 arranged along the inner surface of the ball skin 20, a star And the upper sticker paper 24 covering the outer surface of the ball skin 20. The ball skin 20 is configured by combining two hollow hemispherical molded bodies 20a and 20b.

  As a black explosive which forms the ball skin 20, the well-known black explosive which contains potassium nitrate in the range of 50-80 mass%, the range of 3-30 mass% of sulfur, and the range of 10-40 mass% of charcoal. Can be used. It is preferable that the binder that forms the ball skin 20 is an organic substance that dissolves in water and improves the viscosity. The binder is preferably a polysaccharide. Examples of the polysaccharide used as the binder include galactomannan, konjac mannan, gum arabic, tragacanth gum, karaya gum, alginic acid, funori, agar, starch, cellulose, methylcellulose, ethylcellulose, hydroxyethylcellulose, carboxymethylcellulose. A preferred polysaccharide as a binder is galactomannan, and a particularly preferred galactomannan is guar gum. The blending ratio of the black powder and the binder is generally in the range of 80 to 95% by weight of the black powder, in the range of 20 to 5% by weight of the binder, and preferably in the range of 88 to 93% by weight of the black powder. The binder is in the range of 12-7% by weight.

  In consideration of the time and strength required for burning and burning, the ball skin 20 preferably has a thickness in the range of 1 to 10%, particularly preferably in the range of 3 to 8%, with respect to the inner diameter of the ball skin.

  As shown in FIG. 3, the ball skin 20 is preferably dotted with black powder particles 25 on the inner surface. Scattering the black powder particles 25 on the inner surface of the ball skin 20 results in an increase in the surface area of the inner surface of the ball skin, thereby speeding up the ignition of the ball skin and shortening the time required for burning and burning. be able to.

  The hollow hemispherical molded bodies 20a and 20b forming the ball of the firework fireball of the present invention are prepared by mixing black explosive, binder and water to prepare a hydrous explosive composition. After filling between a female concave part having a concave part and a male convex part having a hemispherical convex part, pressurization is carried out, and then the female mold and the male part are in this order hydrous explosive composition It can be produced by a method consisting of removing from the product and then drying to remove moisture.

  In the preparation of the hydrous explosive composition, the blending ratio of the black explosive and the binder is 100 parts by mass of the total amount of the two, and usually the black explosive is 80 to 95 parts by mass and the binder is 20 to 5 parts by mass It is a ratio. The mixing ratio of water is generally in the range of 5 to 30 parts by mass, preferably in the range of 10 to 30 parts by mass with respect to 100 parts by mass of the explosive composition (mixture of black explosive and binder). In preparing the hydrous explosive composition, it is preferable to first mix a black explosive and a binder to prepare a uniform mixture, and then mix water while confirming the viscosity of the mixture.

  The hydrous explosive composition is pressure-molded into a hollow hemisphere using a female mold 31 having a concave portion 32 recessed in a hemispherical shape and a male mold 33 having a convex portion 34 protruding in a hemispherical shape as shown in FIG. be able to. In order to facilitate the detachment of the female mold and the male mold from the hydrous explosive composition after pressure molding, the female mold 31 is disposed before the hydrous explosive composition 30 is disposed between the female mold 31 and the male mold 33. It is preferable to dispose a release sheet on the surface of the concave portion 32 and the surface of the convex portion 34 of the male mold 33. The release sheet disposed in the female mold 31 has higher releasability than the release sheet disposed in the male mold 33 so that the female mold 31 can be easily detached from the hydrous explosive composition earlier than the male mold 33. Is preferred. Specifically, it is preferable to arrange the resin sheet 35 on the female mold 31 side and the thin paper 36 on the male mold 33 side. As the resin sheet 35, a known resin sheet for packaging can be used, and examples thereof include a polyethylene sheet, a polypropylene sheet, a polyvinyl chloride sheet, and a polyvinylidene chloride sheet. Examples of the thin paper 36 include Japanese paper and craft paper.

  The hollow hemispherical hydrous explosive composition obtained as described above, after opening a hole for inserting a conductor, is dried by sunlight or the like to remove moisture. As a method for interspersing black powder particles on the inner surface of the hollow hemispherical molded body made of the explosive composition thus obtained, for example, an aqueous dispersion of black powder is applied to the inner surface of the hollow hemispherical molded body. A drying method can be used.

  In the firework fireball of the present invention, the split medicine 22 has a spherical porous polymer bead 41 having an average particle diameter of 1 to 5 mm having a hydrophilic adhesive coating layer 42 on the surface, as shown in FIG. It is preferable to use a split agent formed of an explosive layer 44 covering the surface of the hydrophilic adhesive coating layer.

  The spherical porous polymer beads 41 are preferably expanded polystyrene beads.

  The hydrophilic adhesive coating layer 42 is provided to improve the adhesion between the spherical porous polymer beads 41 and the explosive layer 44 and to prevent the spherical porous polymer beads 41 from being charged. The hydrophilic adhesive coating layer 42 is preferably formed from a polyvinyl alcohol-containing adhesive or a vinyl acetate resin-containing adhesive. The amount of the adhesive forming the hydrophilic adhesive coating layer 42 is preferably in the range of 5 to 100 parts by mass, and in the range of 10 to 50 parts by mass with respect to 100 parts by mass of the spherical porous polymer beads. Is particularly preferred.

  The hydrophilic adhesive coating layer 42 preferably contains a black powder 43 in a dispersed state in order to improve ignitability. The amount of the black explosive 43 is preferably in the range of 500 to 5000 parts by mass, particularly preferably in the range of 500 to 3000 parts by mass with respect to 100 parts by mass of the adhesive.

  The explosive forming the explosive layer 44 is preferably a potassium perchlorate-containing explosive composition. The potassium perchlorate-containing explosive composition contains potassium perchlorate in the range of 40-60 mass%, potassium nitrate in the range of 15-30 mass%, carbon material in the range of 10-30 mass%, and paste material in the range of 1-10. It is preferable that it is a composition contained in the ratio used as the range of the mass%. The content of the explosive forming the explosive layer 44 is preferably in the range of 50 to 95% by mass, and particularly preferably in the range of 70 to 95% by mass with respect to the entire split agent.

  The particle diameter of the split agent is preferably in the range of 1.5 to 20 times, and preferably in the range of 2 to 10 times that of the spherical porous polymer beads of the core material.

  In the split medicine, spherical porous polymer beads are put into a stirring granulator, and while the beads are stirred, an aqueous solution of a water-soluble adhesive is sprayed on the beads. A step of attaching a water-soluble adhesive aqueous solution and black powder to the surface, and then taking out from the agitation granulator and drying to obtain polymer beads with a hydrophilic adhesive coating layer, and the hydrophilic adhesive coating layer The charged polymer beads are put into an agitation granulator, the potassium perchlorate-containing explosive composition is added while stirring the beads, and the potassium perchlorate-containing explosive composition is formed on the surface of the hydrophilic adhesive coating layer. Can be produced by a method comprising a step of forming a gunpowder layer.

  As the split medicine 22, in addition to the above split powder, a powder powder in which black powder is applied to a core material such as rice husk or cottonseed, or a split medicine in which the entire split powder is formed from an explosive composition can be used. Japanese Patent Laid-Open No. 2002-277195 discloses a split medicine in which the entire split medicine is formed from an explosive composition.

  In the flying fireworks of the present invention, the star 21 may be a known star used for ordinary flying fireworks. A star is generally a granular material composed of a core material and at least one flame colorant layer formed around the core material. As the core material, spherical porous polymer beads having an average particle diameter of 1 to 5 mm can be used in the same manner as the above-mentioned split medicine. Since the spherical porous polymer beads used as the core material have a high burning rate after ignition, the generation of unburned matter due to stars can be reduced.

  In the firework fireball of the present invention, the upper sticker paper 24 can be a known paper material used for ordinary firework fireworks such as kraft paper.

[Example 1]
(1) Production of hollow hemispherical molded body After mixing 126.3 g of black powder (potassium nitrate 97.2 g, sulfur 9.7 g, charcoal 19.4 g) and 12.2 g of guar gum to obtain a uniform mixture, 31.5 g was added little by little to prepare 170 g of a hydrous explosive composition.
A female die having a concave portion with a hemispherical shape with a diameter of 11 cm was prepared. The concave surface of the female die was covered with a resin sheet, and 170 g of the hydrous explosive composition was placed on the resin sheet. Next, a male mold having a convex portion protruding in a hemispherical shape having a diameter of 10 cm is prepared, the surface of the convex portion of the male mold is covered with thin paper, and the male mold is placed on the female concave portion. Pressure was applied at the convex part of the mold. Subsequently, the female mold and the male mold were separated in this order, the water-containing hollow hemispherical molded body was taken out, and the resin sheet and the thin paper adhered to the surface were peeled off. Next, the water-containing hollow hemispherical molded body was dried in the sun to produce a hollow hemispherical molded body composed of a black powder and a binder. Finally, an aqueous dispersion of black gunpowder was applied to the inner surface of the hollow hemispherical molded body using a brush, dried in the sun, and the black gunpowder was scattered on the inner surface of the hollow hemispherical molded body. .

  Two hydrous hollow hemispherical shaped bodies were produced. Regarding one of the two hollow hemispherical molded bodies, before drying the water-containing hollow hemispherical molded body in the sun, a cylindrical rod is pierced at the bottom to provide a hole for inserting a lead wire. I opened it.

(2) Manufacture of split medicine 2 kg of cotton seed (core material) is put into a stirring granulator, and while stirring the cotton seed, a potassium perchlorate-containing explosive composition (potassium perchlorate 51% by mass) 10 kg of potassium nitrate, 23 mass% of hemp charcoal, 22 mass% of hemp charcoal, and 4 mass% of rice paste) were attached to the surface of cotton seeds to produce an explosive.

(3) Manufacture of a star By a conventional method, a polystyrene was produced by using a foam polystyrene bead having an average particle diameter of 2 mm as a core material, and adding a flame colorant to this to form a flame color layer.

(4) Manufacture of flying fireworks ball The stars produced in (3) above are arranged on the inner surfaces of the two hollow hemispherical shaped bodies produced in (1), and then the above ( The split medicine produced in 2) was filled. In addition, the conducting wire was inserted into the hollow hemispherical molded body with the conducting wire insertion hole before placing the star. The hollow hemispherical molded body filled with the star and the split medicine was quickly combined into a spherical shape, and the periphery of the hollow hemispherical molded body was fastened with an upper paper to produce a fireworks fireball as shown in FIG.

(5) Evaluation When the firework fireball manufactured as described above was fired, the stars burned normally in the air, and a flower pattern was formed. On the other hand, there was no flaming due to burning of the skin. Moreover, when the surrounding ground surface after the launch of the firework fireworks was observed, no unburned product of the ball skin was found.

[Example 2]
(1) Manufacture of hollow hemispherical molded bodies In the same manner as in Example 1 (1), two hollow hemispherical molded bodies were manufactured.

(2) Manufacture of split medicine 270 g of expanded polystyrene beads having an average particle diameter of 2 mm are put into a stirring granulator, and while stirring the beads, 250 mL of a vinyl acetate resin emulsion adhesive aqueous solution having a concentration of 22% by mass is added to the beads. After spraying, 500 g of black powder was added. After visually confirming that all beads were covered with black powder, stirring was stopped, removed from the stirring granulator, dried, and foamed with a water-soluble adhesive layer containing black powder Polystyrene beads were obtained.

  770 g of the obtained polystyrene foam beads with water-soluble adhesive coating layer were put into a stirring granulator, and while stirring the beads, a potassium perchlorate-containing explosive composition (potassium perchlorate 51 mass%, potassium nitrate) 10 kg) of 23 mass%, hemp charcoal 22 mass%, rice paste 4 mass%) was added to the surface of the beads to deposit a potassium perchlorate-containing explosive composition to form an explosive layer on the beads. . The obtained granulated molded product (warm medicine) had an average particle diameter of 4 mm.

(3) Manufacture of a star By a conventional method, a polystyrene was produced by using a foam polystyrene bead having an average particle diameter of 2 mm as a core material, and adding a flame colorant to this to form a flame color layer.

(4) Manufacture of flying fireworks ball The stars produced in (3) above are arranged on the inner surfaces of the two hollow hemispherical shaped bodies produced in (1), and then the above ( The split medicine produced in 2) was filled. In addition, the conducting wire was inserted into the hollow hemispherical molded body with the conducting wire insertion hole before placing the star. The hollow hemispherical molded body filled with the star and the split medicine was quickly combined into a spherical shape, and the periphery of the hollow hemispherical molded body was fastened with an upper paper to produce a fireworks fireball as shown in FIG.

(5) Evaluation When the firework fireball manufactured as described above was fired, the stars burned normally in the air, and a flower pattern was formed. Flames due to the burning of the skin were not seen, and the size of the flower pattern was equivalent to that of the firework fireball produced in Example 1. Moreover, when the surrounding ground surface after the launch of the firework fireworks was observed, no unburned product of the ball skin and the split medicine was found.

It is sectional drawing which shows an example of the conventional flying fireworks ball. It is sectional drawing which shows an example of the fireworks ball according to this invention. FIG. 3 is an enlarged cross-sectional view of a firework firework ball shown in FIG. It is a figure which shows roughly the metal mold | die of the structure which consists of a female type | mold and a male type | mold which can be advantageously used for manufacture of the hollow hemispherical molded object of this invention. It is sectional drawing which shows an example of the split medicine of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Ball skin 10a, 10b Hollow hemispherical molded body 11 Star 12 Split medicine 13 Fire wire 14 Top paper 20 Tail skin 20a, 20b Hollow hemispherical molded body 21 Star 22 Warp medicine 23 Lead wire 24 Top paper 25 Black powder particle 30 Hydroponic composition Object 31 Female mold 32 Concavity 33 Male mold 34 Convex 35 Resin sheet 36 Thin paper 41 Spherical porous polymer beads 42 Hydrophilic adhesive coating layer 43 Black explosive 44 Explosive layer

Claims (10)

  A hollow spherical skin formed from a gunpowder composition comprising 80-95% by weight black powder and 20-5% by weight binder, a star disposed along the inner surface of the skin, A firework fireball including a split medicine filled inside a position, a lead wire drawn out from a filling portion of the split medicine, and an upper cover paper covering an outer surface of the skin.   The fireworks ball according to claim 1, wherein the binding agent for the skin is a polysaccharide.   The fireworks ball according to claim 2, wherein the binding agent for the skin is guar gum.   The fireworks ball according to claim 1, wherein the thickness of the hull is in the range of 1 to 10% with respect to the inner diameter of the hull.   The firework fireball according to claim 1, wherein black powder particles are scattered on the inner surface of the skin.   The split medicine is formed of spherical porous polymer beads having an average particle diameter of 1 to 5 mm having a hydrophilic adhesive coating layer on the surface, and an explosive layer covering the surface of the hydrophilic adhesive coating layer. Item 1. Firework fireballs according to item 1.   The fireworks ball according to claim 6, wherein the hydrophilic adhesive coating layer of the split medicine is formed of a polyvinyl alcohol-containing adhesive or a vinyl acetate resin-containing adhesive.   The sparkling fireball according to claim 6, wherein the hydrophilic adhesive coating layer of the split medicine contains a black powder.   The fireworks ball according to claim 6, wherein the split polymer porous polymer beads are expanded polystyrene beads.   The explosive fireball according to claim 6, wherein the explosive layer of the split medicine is formed from a potassium perchlorate-containing explosive composition.

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