Novel environment-friendly die-casting spraying decoration outer cylinder structure
By using a die-cast, one-piece spraying cylinder structure and paper pulp and inorganic dust materials, the problems of unstable production and safety of spraying fireworks cylinders have been solved, achieving an environmentally friendly, stable, and safe spraying effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN HEXIN MACHINERY CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-26
AI Technical Summary
The existing structure of the outer tube of sparklers has problems such as unstable production, easy combustion, easy damage during transportation, and safety hazards. In addition, traditional materials are not environmentally friendly.
The material is made by mixing pulp, starch and inorganic dust and then molding it into one piece by die casting. The design and molding structure is simple, including an ignition chamber, a gunpowder chamber and a sealing layer. It avoids the defects of traditional paper tubes and uses solid gunpowder fuses and cast partitions to connect the channels.
It achieves efficient production, improved safety, enhanced environmental protection, stable spraying effect, avoids fire hazards, and is easy to operate.
Smart Images
Figure CN224285672U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fireworks structure technology, and in particular to a novel environmentally friendly die-cast spraying outer cylinder structure. Background Technology
[0002] Fountain fireworks, also known as ground-based fireworks, are a common type of fireworks. Their main effect is the spraying of sparks. They are usually placed on the ground and set off in a fixed manner. They are typically placed directly on the ground or on a fixed support and do not need to be launched into the air. They spray continuously, with sparks continuously spraying out from the top of the tube during the firing process, creating an effect similar to a fountain or waterfall.
[0003] The existing outer tube structure for making sparklers is mostly made of multi-layered cardboard, which is manually or mechanically pasted into a tube shape. After drying, the bottom of the outer tube is filled with soil and compacted to form a cavity for holding the propellant. Then, holes are punched in the bottom soil, a fuse is threaded through it, and the propellant and effect powder are loaded into the outer tube. See the instruction manual for details. Figure 1 .
[0004] The existing roll-fly outer tube, when used as a sparkler outer tube, has several drawbacks as follows:
[0005] 1. The process used is to roll paper tubes into outer tubes. Due to the glue and paper, the diameter of the rolled firework outer tubes can vary significantly. Furthermore, the paper-covered outer tubes require a long drying time, making production difficult in rainy weather. The mud layer at the bottom of the outer tube also takes time to dry completely, making production time-consuming and labor-intensive. During transport, the mud on the outer tubes and boxes can easily break, loosen, or cause the seals to become loose, leading to spillage of the explosives and loosening or even detachment of the fuse, affecting the firework's ignition effect.
[0006] 2. Although most fireworks are Class D fireworks that are set off at close range and are considered relatively low-risk products, their packaging material is mostly paper tubes. Prolonged spraying of fireworks can easily cause the paper tubes to burn, resulting in secondary hazards.
[0007] This utility model optimizes the design to address the above-mentioned problems and other possible improvements. Utility Model Content
[0008] The purpose of this utility model is to address the above problems by providing a new type of environmentally friendly die-cast fireworks outer cylinder structure. It has a simple structure, is easy to operate, can be integrally molded, mass-produced, has a good fireworks display effect, is environmentally friendly and pollution-free, does not pose a fire hazard, and has a stable fireworks display effect.
[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a novel environmentally friendly die-cast spray-painted outer cylinder structure, which is formed by die-casting a mixture of pulp, starch, and inorganic dust; it includes an outer cylinder body 1, an ignition chamber 4 at the top of the outer cylinder body 1, a gunpowder chamber 3 at the bottom of the outer cylinder body 1, a sealing layer 2 between the ignition chamber 4 and the gunpowder chamber 3, a connecting channel 7 in the middle of the sealing layer 2, the connecting channel 7 connecting the ignition chamber 4 and the gunpowder chamber 3; the volume of the ignition chamber 4 is much smaller than that of the gunpowder chamber 3, and the ignition chamber 4 is located at the upper position when used vertically; the upper part of the sealing layer 2 is provided with an arc-shaped convex sealing outer wall 22, with an inverted conical upper ignition chamber 6 in the middle, and a corresponding conical lower ignition chamber 5 below the sealing layer 2, the conical heads of the two chambers are connected; the lower ignition chamber 5 smoothly transitions downward to the arc-shaped convex inner sealing wall 21 above the gunpowder chamber 3.
[0010] Furthermore, the opening of the inner wall of the ignition chamber 4, i.e. the side wall 41 of the ignition chamber, is wider at the top and narrower at the bottom, and the inner wall has a taper; the angle N between the frontal projection plane of the inner wall of the ignition chamber 4 and the upper bottom surface is 80-86 degrees.
[0011] Furthermore, the vertical distance between the top end face of the upper ignition chamber 6 and the end face of the ignition chamber 4 is h, and the distance h is 0.5-3mm.
[0012] Furthermore, a gunpowder fuse for ignition is provided in the connecting channel 7 between the ignition chamber 4 of the outer cylinder and the sealing layer 2, and spark gunpowder is provided in the gunpowder chamber 3 of the outer cylinder, and the gunpowder fuse is connected to the spark gunpowder. The gunpowder fuse is solid. After the gunpowder is filled, the bottom of the outer cylinder is sealed with mud or paper.
[0013] Furthermore, the upper part of the connecting channel 7 is configured as an upper ignition chamber 6 with an inverted conical structure, and the lower part of the connecting channel 7 is configured as a lower ignition chamber 5 with a conical structure. A thin-layer cast partition is provided at the conical head between the two chambers to connect the channel 7. The partition needs to be opened to connect the two chambers during use.
[0014] The beneficial effects of this utility model are as follows: This utility model provides a new type of environmentally friendly die-casting spray cylinder structure, which is simple in structure, easy to operate, can be integrally molded, mass-produced, has a good fireworks display effect, is environmentally friendly and pollution-free, does not pose a fire hazard, and has a stable spray effect.
[0015] 1. New environmentally friendly materials are used. The outer tube structure of fireworks is formed by mixing pulp, starch and inorganic dust, mainly limestone powder, which facilitates one-piece molding. This makes the processing and production more efficient and convenient, and it is not affected by weather conditions, allowing for all-weather production.
[0016] 2. This utility model has a simple structure and is easy to operate. After mixing the pulp and limestone, it is molded into one piece, saving time and labor. It replaces the traditional manual operation process of paper tube making and clay sealing. Production can be arranged reasonably according to plan, without relying on weather factors and affecting the production progress.
[0017] 4. This utility model connects the gunpowder chamber and the ignition chamber by setting a channel plate on the connecting channel, replacing the traditional fuse. Standardized operation can avoid the situation of improper insertion of the fuse and also avoid damage to the fireworks due to loose fuse.
[0018] 5. The vertical distance h between the top end face of the upper ignition chamber and the end face of the ignition chamber in this utility model is 0.5-3mm, which can better prevent the spark flame from burning the ignition side wall of the paper roll in the case of the paper roll. The ignition side wall in this application is not easy to burn, and the ignition side wall is tapered.
[0019] 6. The opening of the inner wall of the ignition chamber of this utility model is larger at the top and smaller at the bottom, and the inner wall is tapered; the angle N between the frontal projection plane of the inner wall of the ignition chamber and the upper bottom plane is 80-86 degrees. This design improves the spraying effect of the spray. When the spray is sprayed out from the channel opening of the connecting channel and the flame is sprayed outward, the side wall with a large opening and a small bottom is less likely to come into contact with the spray.
[0020] 7. The arc-shaped, convex inner wall of the seal above the gunpowder chamber of this utility model allows the gunpowder sprayed inside the gunpowder chamber to react evenly, and the contact time between the fuse and the gunpowder in the gunpowder chamber through the channel is closer to the same. The distance between the gunpowder inside the arc-shaped top and the center point is closer to the same, and the recoil force of the burning agent is directed towards the outlet, so the burning agent is more complete and the spray pattern is more beautiful and longer-lasting. Attached Figure Description
[0021] Figure 1 This is a three-dimensional structural diagram of the outer tube of an existing paper roll firework and its main sectional view.
[0022] Figure 2 This is a three-dimensional structural diagram of the present invention.
[0023] Figure 3 for Figure 1 A half-section 3D schematic diagram.
[0024] Figure 4 for Figure 1 A bottom view diagram.
[0025] Figure 5 for Figure 1 Top view diagram.
[0026] Figure 6 for Figure 5 Schematic diagram of sectional view AA.
[0027] Figure 7 for Figure 6 A magnified view of a portion of point B in the middle.
[0028] Figure 8 This is a physical sample image of the product of this utility model (a product sample has been made and tested to be usable and effective).
[0029] The text labels in the diagram represent: 80, outer cylinder of the roll; 81, roll paper; 82, ignition chamber of the roll; 83, bottom mud layer; 84, channel hole; 85, gunpowder chamber of the roll; 86, ignition side wall of the roll;
[0030] 1. Outer cylinder body; 2. Sealing layer; 21. Inner wall of the seal; 22. Outer wall of the seal; 3. Gunpowder chamber; 4. Ignition chamber; 41. Side wall of the ignition chamber; 5. Lower ignition chamber; 6. Upper ignition chamber; 7. Connecting channel;
[0031] h is the vertical distance between the top end face of the ignition head and the end face of the ignition chamber. Detailed Implementation
[0032] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.
[0033] The embodiments of this utility model will be further described below with reference to the accompanying drawings:
[0034] Figure 1 The existing fireworks outer tube structure is a roll outer tube 80, which is formed by manually or mechanically rolling layers of paper roll 81 after applying glue. After completion, the roll outer tube 80 needs time to dry. The bottom of the roll outer tube 80 is provided with a bottom mud layer 83, which is generally formed by manually or mechanically pressing and compacting soil to form a partition, dividing the roll outer tube 80 into a roll ignition chamber 82 and a roll gunpowder chamber 85. A channel hole 84 is provided on the bottom mud layer 83, which is used to insert the ignition fuse. In this case, when the roll ignition side wall 86 is burning and spraying fireworks, the temperature of its side wall is high and the duration is long, and the roll outer tube is more likely to cause secondary dangers due to combustion.
[0035] like Figures 2-7As shown, the specific structure of this utility model is as follows: a novel environmentally friendly die-cast spray-painted outer cylinder structure, which is made by uniformly mixing pulp, starch and inorganic dust, and then integrally die-casting; it includes an outer cylinder body 1, the top of the outer cylinder body 1 is provided with an ignition chamber 4, the bottom of the outer cylinder body 1 is provided with a gunpowder chamber 3, a sealing layer 2 is provided between the ignition chamber 4 and the gunpowder chamber 3, and a connecting channel 7 is provided in the middle of the sealing layer 2, the connecting channel 7 connecting the ignition chamber 4 and the gunpowder chamber 3; the volume of the ignition chamber 4 is much smaller than that of the gunpowder chamber 3, and the ignition chamber 4 is located at the upper position when used vertically; the upper part of the sealing layer 2 is provided with an arc-shaped convex sealing outer wall 22, the middle part of which is a conical upper ignition chamber 6, and the lower part of the sealing layer 2 is provided with a conical lower ignition chamber 5, the conical heads of the two chambers are connected; the lower ignition chamber 5 smoothly transitions downward to the arc-shaped convex sealing inner wall 21 above the gunpowder chamber 3.
[0036] See Figure 6 , Figure 7 Preferably, the opening of the inner wall of the ignition chamber 4, i.e. the side wall 41 of the ignition chamber, is wider at the top and narrower at the bottom, and the inner wall has a taper; the angle N between the frontal projection plane of the inner wall of the ignition chamber 4 and the upper bottom surface is 80-86 degrees.
[0037] The outer cylinder structure is integrally formed, and the inner wall of the ignition chamber has a larger opening at the top and a smaller opening at the bottom, with a tapered inner wall. The angle N between the frontal projection plane of the inner wall of the ignition chamber and the upper bottom surface is 80-86 degrees. This design enhances the spraying effect of the sparkler. When the sparkler is sprayed out from the channel opening of the connecting channel and the flame is sprayed outward, the side wall with a larger opening and a smaller bottom is less likely to come into contact with the sparkler, making it less likely to ignite, thus making the ignition safer.
[0038] See Figure 6 , Figure 7 Preferably, the vertical distance between the top end face of the upper ignition chamber 6 and the end face of the ignition chamber 4 is h, and the distance h is 0.5-3mm.
[0039] The vertical distance h between the top end face of the upper ignition chamber and the end face of the ignition chamber is 0.5-3mm, which can better prevent the spark flame from burning onto the ignition side wall of the paper roll in the case of paper roll burning. The ignition chamber side wall in this application is not easy to burn, and the ignition chamber side wall is tapered.
[0040] Preferably, a gunpowder fuse for ignition is provided in the connecting channel 7 between the ignition chamber 4 of the outer cylinder and the sealing layer 2, and spark gunpowder is provided in the gunpowder chamber 3 of the outer cylinder, and the gunpowder fuse is connected to the spark gunpowder. The gunpowder fuse is solid. After the gunpowder is filled, the bottom of the outer cylinder is sealed with mud or paper.
[0041] In addition, the arc-shaped, convex inner wall of the seal above the gunpowder chamber of this utility model allows the sprayed gunpowder in the gunpowder chamber to react evenly, and the contact time between the fuse and the gunpowder in the gunpowder chamber through the channel is closer to the same. The distance between the gunpowder inside the arc-shaped top and the center point is closer to the same, and the recoil force of the burning agent is directed towards the outlet, so the burning agent is more complete and the spray pattern is more beautiful and longer-lasting.
[0042] Preferably, the upper part of the connecting channel 7 is configured as an upper ignition chamber 6 with an inverted conical structure, and the lower part of the connecting channel 7 is configured as a lower ignition chamber 5 with a conical structure. A thin-layer cast partition is provided at the conical head between the two chambers to connect the channel 7. The partition needs to be opened to connect the two chambers during use.
[0043] The purpose of setting up casting partitions is to prevent the upper and lower ignition chambers from sticking to the mold during demolding, which could lead to manufacturing defects; at the same time, it maintains the integrity of the product and facilitates its flow and forming.
[0044] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0045] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this utility model, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.
Claims
1. A novel environmentally friendly die-cast spray-painted outer cylinder structure, characterized in that, It is made by mixing pulp, starch and inorganic dust, and then molding it into one piece by die casting; it includes an outer cylinder body, an ignition chamber at the top of the outer cylinder body, a gunpowder chamber at the bottom of the outer cylinder body, a sealing layer between the ignition chamber and the gunpowder chamber, and a connecting channel in the middle of the sealing layer, the connecting channel connecting the ignition chamber and the gunpowder chamber; The volume of the ignition chamber is much smaller than that of the gunpowder chamber, and the ignition chamber is located at the upper position when used vertically. The sealing layer is provided with an arc-shaped, convex sealing outer wall above it, with an inverted conical upper ignition chamber in the middle, and a conical lower ignition chamber below the sealing layer. The conical heads of the two chambers are connected. The lower ignition chamber smoothly transitions downwards to the arc-shaped, upward-convex inner wall of the sealing opening above the gunpowder chamber.
2. The novel environmentally friendly die-cast spray-painted outer cylinder structure according to claim 1, characterized in that, The opening of the inner wall of the ignition chamber is wider at the top and narrower at the bottom, and the inner wall is tapered; the angle N between the orthographic projection plane of the inner wall of the ignition chamber and the upper bottom surface is 80-86 degrees.
3. The novel environmentally friendly die-cast spray-painted outer cylinder structure according to claim 1, characterized in that, The vertical distance between the top end face of the upper ignition chamber and the end face of the ignition chamber is h, and the distance h is 0.5-3mm.
4. The novel environmentally friendly die-cast spray-painted outer cylinder structure according to claim 1, characterized in that, The ignition chamber of the outer cylinder and the connecting channel between the sealing layer are provided with a gunpowder fuse for ignition. The gunpowder chamber of the outer cylinder is provided with sparking gunpowder, and the gunpowder fuse is connected to the sparking gunpowder. The gunpowder fuse is solid. After the gunpowder is filled, the bottom of the outer cylinder is sealed with mud or paper.
5. The novel environmentally friendly die-cast spray-painted outer cylinder structure according to claim 1, characterized in that, The upper part of the connecting channel is configured as an inverted conical upper ignition chamber, and the lower part of the connecting channel is configured as a conical lower ignition chamber. A thin-layer cast partition is provided at the conical head between the two chambers. The cast partition needs to be opened to connect them during use.