Bio-based polymeric material spraying cylinder

Abstract

The utility model discloses a bio-based polymeric material firework cylinder, which belongs to the technical field of firework cylinders, and comprises a cylinder body, a first inner cavity and a second inner cavity are arranged in the cylinder body, a plug is arranged at one end of the first inner cavity, the other end of the first inner cavity is communicated with the second inner cavity, a fire spraying port is arranged on the plug, and the first inner cavity is communicated with the outside through the fire spraying port. The side wall thickness of the first inner cavity is greater than that of the second inner cavity; the second inner cavity is filled with mud bottom, and the first inner cavity is filled with firework effect powder; and the first inner cavity is connected with the fire spraying opening through a trumpet-shaped connecting opening. The firework barrel is used for solving the problem of barrel explosion when the firework barrel is set off.

Description

Technical Field

[0001] This utility model belongs to the field of fireworks tube technology, specifically a bio-based polymer material spray tube. Background Technology

[0002] Fireworks typically have a nozzle at one end of the tube, filled with pyrotechnic powder, and both ends of the powder are sealed. Once ignited by a fuse, the powder is ejected from the nozzle, creating a decorative firework pattern outside. Current firework tubes are made of rolled paper, in various shapes including cylindrical (also known as straight tubes), conical, or other irregular shapes. Because the paper rolling process requires gluing, the rolled tubes must be dried or sun-dried. A fuse and igniter must then be pressed into one end before further filling. Therefore, the entire tube manufacturing process is lengthy, and for manufacturers without drying equipment, production is significantly affected by weather conditions.

[0003] Patent application CN212362986U discloses an integrated plant fiber environmentally friendly firework tube with a flame nozzle. This firework tube is made using an integrated hot-pressing process, and the resulting firework tube does not require a subsequent drying process. However, after filling with firework effect powder and pressing the mud base, during the subsequent firing process, the internal pressure of the tube may become too high due to the strength of the tube sidewall or the size of the flame nozzle being too small, causing the firework to explode. However, simply increasing the size of the flame nozzle is not convenient for filling and transporting firework effect powder in actual production.

[0004] Meanwhile, existing sparklers cannot effectively insulate against heat after being set off because the sidewalls of the sparkler tube are not thick enough. As a result, the overall temperature of the sparkler tube is high after being set off. If users pick up the sparkler tube out of curiosity or other reasons after setting it off, there is a risk of the sparkler tube burning the user's fingers. Utility Model Content

[0005] To address the above problems, this invention provides a bio-based polymer material spray tube to solve the problem of fireworks tubes exploding during ignition.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A bio-based polymer material spray nozzle, characterized in that it comprises a cylinder body, the cylinder body having a first inner cavity and a second inner cavity inside, a plug at one end of the first inner cavity and the other end connected to the second inner cavity, a nozzle being provided on the plug, the first inner cavity being connected to the outside through the nozzle, the inner diameter of the first inner cavity being smaller than the inner diameter of the second inner cavity, and the sidewall thickness of the first inner cavity being greater than the sidewall thickness of the second inner cavity; the second inner cavity is used to fill a mud bottom, and the first inner cavity is used to fill firework effect powder; the first inner cavity and the nozzle are connected by a funnel-shaped connector.

[0008] As a further improvement to the above technical solution, the ratio between the radius of the flame nozzle and the inner diameter of the first inner cavity is 4:8-9.5; the ratio between the inner diameter of the first inner cavity and the thickness of the sidewall of the first inner cavity is 9:4.5-5.5.

[0009] As a further improvement to the above technical solution, the upper end of the flame nozzle is connected to the guide groove, and the guide groove is funnel-shaped.

[0010] As a further improvement to the above technical solution, the connection between the flame nozzle and the guide groove is made by rounded corners, and the connection between the flame nozzle and the first inner cavity is made by rounded corners.

[0011] As a further improvement to the above technical solution, the first inner cavity and the second inner cavity are connected by an arc-shaped connecting surface, wherein the two ends of the arc-shaped connecting surface are tangent to the side surface of the first inner cavity or the side surface of the second inner cavity, respectively.

[0012] As a further improvement to the above technical solution, a demolding rib is provided on the inner sidewall of the first inner cavity; the demolding rib is arranged in a ring shape, and the axis of the demolding rib is arranged in the same direction as the axis of the first inner cavity.

[0013] As a further improvement to the above technical solution, the shape of the cylinder is a cylindrical cylinder, a conical cylinder, or other irregularly shaped cylinder.

[0014] As a further improvement to the above technical solution, the cylinder, the first inner cavity, the second inner cavity, the flame nozzle, and the plug are integrated into a single structure through a molding process.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: Two inner cavities are provided inside the tube, one for filling with pyrotechnic effect powder and the other for filling with mud. The sidewall of the first inner cavity, filled with pyrotechnic effect powder, is thickened to prevent incomplete pressure release and potential explosion during ignition, thus avoiding injury. Furthermore, the funnel-shaped connection between the nozzle and the first inner cavity guides the gas generated after ignition and the propellant to be ejected, preventing excessive local pressure. Additionally, the thickened sidewall of the first inner cavity provides insulation, preventing burns from the pyrotechnic tube after ignition.

[0016] By controlling the dimensions such as the radius of the nozzle, the thickness of the first inner cavity sidewall, and the inner diameter of the first inner cavity, it can be ensured that the firework tube is not overfilled with fireworks gunpowder during the production process, while also avoiding the situation of the tube exploding due to insufficient strength of the tube sidewall or the inability of the nozzle to release pressure in time.

[0017] The demolding ribs provided on the side wall of the first inner cavity can further strengthen the side wall of the first inner cavity. At the same time, the demolding ribs facilitate the mold to take the cylinder out of the mother mold after hot pressing, making it easy to demold the cylinder. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of this utility model in half section.

[0020] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0021] In the diagram: 1. Cylinder; 2. First inner cavity; 21. Plug; 22. Connection port; 3. Second inner cavity; 4. Flame nozzle; 5. Guide groove; 6. Arc-shaped connection surface; 7. Demolding rib. Detailed Implementation

[0022] 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 embodiments. The description in this part is only exemplary and explanatory, and should not be used to limit the protection scope of this utility model in any way.

[0023] Example 1:

[0024] A bio-based polymer material spray nozzle, characterized in that it comprises a cylinder body, the cylinder body having a first inner cavity and a second inner cavity inside, a plug at one end of the first inner cavity and the other end connected to the second inner cavity, a nozzle being provided on the plug, the first inner cavity being connected to the outside through the nozzle, the inner diameter of the first inner cavity being smaller than the inner diameter of the second inner cavity, and the sidewall thickness of the first inner cavity being greater than the sidewall thickness of the second inner cavity; the second inner cavity is used to fill a mud bottom, and the first inner cavity is used to fill firework effect powder; the first inner cavity and the nozzle are connected by a funnel-shaped connector.

[0025] As a preferred embodiment of the above, the ratio between the radius of the flame nozzle and the inner diameter of the first inner cavity is 4:8-9.5; the ratio between the inner diameter of the first inner cavity and the thickness of the sidewall of the first inner cavity is 9:4.5-5.5.

[0026] As a preferred embodiment of the above, the upper end of the flame nozzle is connected to the guide groove, and the guide groove is funnel-shaped.

[0027] As a preferred embodiment of the above, the connection between the flame nozzle and the guide groove is made by rounded corners, and the connection between the flame nozzle and the first inner cavity is made by rounded corners.

[0028] As a preferred embodiment of the above, the first inner cavity and the second inner cavity are connected by an arc-shaped connecting surface, wherein the two ends of the arc-shaped connecting surface are tangent to the side surface of the first inner cavity or the side surface of the second inner cavity, respectively.

[0029] As a preferred embodiment of the above, a demolding rib is provided on the inner sidewall of the first inner cavity; the demolding rib is arranged in a ring shape, and the axis of the demolding rib is arranged in the same direction as the axis of the first inner cavity.

[0030] As a preferred embodiment of the above, the shape of the cylinder is a cylindrical cylinder, a conical cylinder, or other irregularly shaped cylinder.

[0031] As a preferred embodiment of the above, the cylinder, the first inner cavity, the second inner cavity, the flame nozzle, and the plug are formed into an integrated structure through a molding process.

[0032] The cylinder provided in this embodiment is processed as follows: gelatinized starch, starch, plant fiber, and kaolin powder are put into a mixer and stirred. Water is added during the stirring process to obtain a paste-like biodegradable bio-based polymer material. The material is placed into a mold made from the cylinder as described in this embodiment and hot-pressed at high temperature (refer to the production process of fireworks molding assembly) to form a cylinder. Firework effect powder is filled into the prepared cylinder in a known manner, and a fuse is inserted into the injection nozzle. The fuse is inserted before the firework effect powder is filled. The second inner cavity at the bottom of the cylinder is sealed with mud. The mud filling position must extend beyond the arc-shaped connecting surface to the lower part of the first inner cavity to form a spray.

[0033] 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.

[0034] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only used to help understand the method and core ideas of this utility model.

[0035] The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principle 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 bio-based polymeric material spray gun, characterized in that, The device includes a cylindrical body, which has a first inner cavity and a second inner cavity inside. One end of the first inner cavity is provided with a plug, and the other end is connected to the second inner cavity. The plug is provided with a flame nozzle. The first inner cavity is connected to the outside through the flame nozzle. The inner diameter of the first inner cavity is smaller than the inner diameter of the second inner cavity, and the sidewall thickness of the first inner cavity is greater than the sidewall thickness of the second inner cavity. The second inner cavity is used to fill the mud bottom, and the first inner cavity is used to fill the firework effect powder. The first inner cavity and the flame nozzle are connected by a funnel-shaped connector.

2. The bio-based polymeric material spray gun according to claim 1, characterized in that, The ratio between the radius of the flame nozzle and the inner diameter of the first inner cavity is 4:8-9.5; the ratio between the inner diameter of the first inner cavity and the thickness of the sidewall of the first inner cavity is 9:4.5-5.

5.

3. The bio-based polymeric material spray gun according to claim 1 or 2, characterized in that, The upper end of the flame nozzle is connected to a guide groove, which is funnel-shaped.

4. The bio-based polymeric material spray gun according to claim 3, characterized in that, The flame nozzle is connected to the guide groove by a rounded corner, and the flame nozzle is connected to the first inner cavity by a rounded corner.

5. The bio-based polymeric material spray gun according to claim 1, characterized in that, The first inner cavity and the second inner cavity are connected by an arc-shaped connecting surface, wherein the two ends of the arc-shaped connecting surface are tangent to the side surface of the first inner cavity or the side surface of the second inner cavity, respectively.

6. The bio-based polymeric material spray gun according to claim 4, characterized in that, The inner wall of the first inner cavity is provided with a release rib; the release rib is arranged in a ring shape, and the axis of the release rib is arranged in the same direction as the axis of the first inner cavity.

7. The bio-based polymeric material spray gun according to claim 6, characterized in that, The cylinder can be cylindrical, conical, or other irregularly shaped.

8. The bio-based polymer spray gun according to claim 6, characterized in that, The cylinder, the first inner cavity, the second inner cavity, the flame nozzle, and the plug are formed into an integrated structure through a molding process.

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