Paper gun barrel cutting machine for firecrackers and fireworks

Abstract

The utility model discloses a paper barrel cutting machine for firecrackers and fireworks, which relates to the technical field of firecracker production and comprises a cutting component, a pushing component and a supporting plate. The cutting assembly comprises a rotating shaft, a first circular blade, a second circular blade and a first driving structure. And the pair of second circular blades is arranged between the two adjacent first circular blades. The sum of the radius of the first circular blade and the diameter of the rolled strip is not larger than the sum of the radius of the second circular blade and 5 mm. The first driving structure drives the rotating shaft to rotate. The pushing assembly comprises a pushing plate and a second driving structure. The second driving structure is used for pushing the push plate to the rotating shaft, and the push plate is used for pushing the rolled strips to the rotating shaft. A first cutter groove used for avoiding the first circular blade and a second cutter groove used for avoiding the second circular blade are formed in the side, facing the rotating shaft, of the push plate. Compared with the prior art, friction between the blade and the roll strip is reduced, so that the cutting quality of the roll strip can be improved, and the cutting cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of firecracker production, in particular to a paper cartridge cutting machine for firecrackers and fireworks. Background Art

[0002] The production of roll strips is a key link in the production process of firecrackers. When producing roll strips, the clamping mechanism for fixing the roll strips and the circular blade for cutting the roll strips rotate on different axes respectively. The roll strips pass through the circular blade under the action of the clamping mechanism, so as to cut the roll strips into multiple paper cartridges. In order to improve the cutting efficiency, usually multiple circular blades with the same outer diameter are used to cut the roll strips simultaneously. However, with the increase in the number of circular blades, the friction force between the circular blades and the roll strips increases, resulting in the following problems:

[0003] 1. Obvious defects such as steps, triangles, and flats are extruded at the mouth of the paper cartridge;

[0004] 2. The required power and power consumption of the transmission mechanism increase significantly;

[0005] 3. The replacement frequency of the circular blades increases significantly;

[0006] 4. The clamping mechanism is complex and the maintenance cost is high.

[0007] The first problem above will greatly reduce the production efficiency of the subsequent process in the firecracker production process, affecting the quality and aesthetics of the finished product. The second to fourth problems will significantly increase the production cost. Content of the Utility Model

[0008] The purpose of the utility model is to provide a paper cartridge cutting machine for firecrackers and fireworks, so as to solve the problems existing in the above-mentioned prior art, improve the cutting quality of roll strips, and reduce the cutting cost.

[0009] To achieve the above purpose, the utility model provides the following scheme:

[0010] The utility model discloses a paper cartridge cutting machine for firecrackers and fireworks, including:

[0011] A cutting assembly for cutting roll strips into paper cartridges. The cutting assembly includes a rotating shaft, a blade, and a first driving structure. The blade includes a first circular blade and a second circular blade. The number of the first circular blades is multiple, and the multiple first circular blades are coaxially fixed on the rotating shaft. The second circular blades are arranged in pairs, and a pair of second circular blades are arranged between two adjacent first circular blades and coaxially fixed on the rotating shaft. The sum of the radius of the first circular blade and the diameter of the roll strip is not greater than the sum of the radius of the second circular blade and 5 mm. The first driving structure is used to drive the rotating shaft to rotate;

[0012] A pushing component for pushing a roll strip, the pushing component including a push plate and a second driving structure; the second driving structure is used to push the push plate towards the rotating shaft, and the push plate is used to push the roll strip towards the rotating shaft; a first knife groove and a second knife groove are provided on one side of the push plate facing the rotating shaft; the first knife groove is used to avoid the first circular blade, and the second knife groove is used to avoid the second circular blade;

[0013] A supporting plate, the supporting plate being used to support the roll strip pushed by the push plate.

[0014] Preferably, the firecracker and fireworks paper cartridge cutting machine further includes a guiding device, the guiding device extending between two adjacent blades and being used to guide out the paper cartridge stuck between two adjacent blades.

[0015] Preferably, the first driving structure includes a first motor, and an output shaft of the first motor is connected to the rotating shaft to drive the rotating shaft to rotate.

[0016] Preferably, the second driving structure includes a second motor, a crank and connecting rod mechanism, and a guiding platform; the second motor is used to drive the crank of the crank and connecting rod mechanism to rotate, and the connecting rod of the crank and connecting rod mechanism is hinged to the push plate to push the push plate to slide on the guiding platform; the guiding platform has a guide rail, and the guide rail is used to guide the push plate.

[0017] Preferably, the second driving structure further includes a driving pulley, a driven pulley, and a transmission belt; the driving pulley is fixed on the output shaft of the second motor, and the driving pulley is in transmission connection with the driven pulley through the transmission belt; a first end of the connecting rod is hinged to an eccentric position of the driven pulley, and a second end of the connecting rod is hinged to the push plate.

[0018] Preferably, the rotating shaft is horizontally arranged, the guiding direction of the guide rail is perpendicular to the rotating shaft, and the included angle between the guiding direction of the guide rail and the horizontal plane is not greater than 15°.

[0019] Preferably, the push plate includes a plurality of push plate units, and the plurality of push plate units are linearly distributed along a direction parallel to the rotating shaft, and two adjacent push plate units are detachably and fixedly connected.

[0020] Preferably, both the first circular blade and the second circular blade are key-connected to the rotating shaft.

[0021] Preferably, spacer blocks are arranged between two adjacent first circular blades, between two adjacent second circular blades, and between an adjacent first circular blade and the second circular blade, and the spacer blocks are slidably sleeved on the rotating shaft.

[0022] Preferably, the outer sides of the first circular blades at both ends of the rotating shaft are locked by nuts, and the nuts are threadedly connected to the rotating shaft.

[0023] The utility model has achieved the following technical effects compared with the prior art:

[0024] When the first circular blade and the second circular blade perform cutting actions respectively, since the number of blades performing cutting actions simultaneously is small, the friction between the blade and the strip can be reduced. On the other hand, after the paper cartridge between a pair of second circular blades is cut off and leaves its original position first, the second circular blade only contacts the remaining strip on one side, and the second circular blade has a space for elastic deformation. When the first circular blade cuts the remaining strip, the first circular blade axially presses the strip, and the strip axially presses the second circular blade, causing the second circular blade to elastically deform under the axial pressing of the strip, so as to reduce the compression amount per unit length of the strip by increasing the length of the strip, and further reduce the friction between the strip and the first circular blade. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic diagram of the paper cartridge cutting machine for firecrackers and fireworks in the embodiment of the present invention;

[0027] Figure 2 It is a top view of the paper cartridge cutting machine for firecrackers and fireworks in the embodiment of the present invention.

[0028] In the figure: 1 - driven pulley; 2 - first motor; 3 - first circular blade; 4 - second circular blade; 5 - driving pulley; 6 - connecting rod; 7 - push plate; 8 - strip; 9 - guide rail; 10 - support plate; 11 - feeder. Detailed Embodiment

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0030] The purpose of the present utility model is to provide a cutting machine for paper cartridges of firecrackers and fireworks, so as to solve the problems existing in the above-mentioned prior art, improve the cutting quality of the rolled strips, and reduce the cutting cost.

[0031] In order to make the above-mentioned objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Refer to Figure 1 , Figure 2 , this embodiment provides a cutting machine for paper cartridges of firecrackers and fireworks, including a cutting assembly, a pushing assembly, and a supporting plate 10.

[0033] The cutting assembly is used to cut the rolled strip 8 into paper cartridges, and includes a rotating shaft, a blade, and a first driving structure. The blade includes a first circular blade 3 and a second circular blade 4. The number of the first circular blades 3 is multiple, and the multiple first circular blades 3 are coaxially fixed on the rotating shaft. The second circular blades 4 are arranged in pairs, and a pair of second circular blades 4 are arranged between two adjacent first circular blades 3 and are coaxially fixed on the rotating shaft. The sum of the radius of the first circular blade 3 and the diameter of the rolled strip 8 is not greater than the sum of the radius of the second circular blade 4 and 5 mm. The first driving structure is used to drive the rotating shaft to rotate.

[0034] The pushing assembly is used to push the rolled strip 8, and includes a pushing plate 7 and a second driving structure. The second driving structure is used to push the pushing plate 7 towards the rotating shaft, and the pushing plate 7 is used to push the rolled strip 8 towards the rotating shaft. The side of the pushing plate 7 facing the rotating shaft is provided with a first knife groove and a second knife groove. The first knife groove is used to avoid the first circular blade 3, and the second knife groove is used to avoid the second circular blade 4. The depths of the first knife groove and the second knife groove can be the same or different, as long as they can play a role in avoiding the corresponding blades.

[0035] The supporting plate 10 is used to support the rolled strip 8 pushed by the pushing plate 7.

[0036] The working principle of the cutting machine for paper cartridges of firecrackers and fireworks in this embodiment is as follows:

[0037] During the process of the blade cutting the rolled strip 8, the blade occupies a part of the space originally belonging to the rolled strip 8, thereby axially compressing the rolled strip 8. When the length of the rolled strip 8 and the thickness of a single blade remain unchanged, the more the number of blades, the greater the compression amount corresponding to the rolled strip 8 per unit length, and the normal pressure between the blade and the rolled strip 8 is positively correlated with this compression amount. Therefore, the more the number of blades performing the cutting action simultaneously, the greater the normal pressure between the blade and the rolled strip 8, and the greater the frictional force. When the frictional force increases to a certain range, the problems mentioned in the background art will occur.

[0038] In this embodiment, without changing the total number of blades, by adjusting the time sequence of blade cutting, the friction between the blade and the strip 8 is reduced, thereby solving various problems caused by excessive friction between the blade and the strip 8.

[0039] Specifically, in this embodiment, the blade includes a second circular blade 4 with a relatively large radius and a first circular blade 3 with a relatively small radius. The second circular blade 4 cuts the strip 8 before the first circular blade 3. Due to the dimensional relationship between the radii of the first circular blade 3 and the second circular blade 4, the cutting processes of the two do not overlap in time.

[0040] Therefore, when the first circular blade 3 and the second circular blade 4 perform cutting actions respectively, since the number of blades performing cutting actions simultaneously is small, the friction between the blade and the strip 8 can be reduced.

[0041] On the other hand, after the paper cartridge between a pair of second circular blades 4 is cut off and leaves its original position first, the second circular blade 4 only contacts the remaining strip 8 on one side, and the second circular blade 4 has room for elastic deformation. When the first circular blade 3 cuts the remaining strip 8, the first circular blade 3 axially squeezes the strip 8, and the strip 8 axially squeezes the second circular blade 4, causing the second circular blade 4 to elastically deform under the axial squeezing of the strip 8, so as to reduce the compression amount per unit length of the strip 8 by increasing the length of the strip 8, and further reduce the friction between the strip 8 and the first circular blade 3.

[0042] As a possible example, in this embodiment, the paper cartridge cutting machine for firecrackers and fireworks further includes a feeder 11 located below the rotating shaft. The feeder 11 extends into the space between adjacent two blades and is used to guide out the paper cartridge stuck between adjacent two blades.

[0043] It should be noted that most of the paper cartridges fly backward downward at the moment of being cut off, and a small part of the paper cartridges are stuck between adjacent two blades. The stuck paper cartridges contact the feeder 11 during the rotation with the blades and are pushed out from between adjacent two blades by the feeder 11.

[0044] When it is said that the feeder 11 in this embodiment is located below the rotating shaft, it means that the main part of the feeder 11 is located below the rotating shaft. In actual use, the upper end of the feeder 11 can extend to the position between adjacent two blades in front of the rotating shaft. The inclined section in this embodiment is preferably an inclined section in the shape of an arc, and an inclined straight section can also be selected.

[0045] As a possible example, in this embodiment, the first driving structure includes a first motor 2. The output shaft of the first motor 2 is connected to the rotating shaft to drive the rotating shaft to rotate. However, the actual implementation manner is not limited to this. For example, a transmission structure such as a speed reducer can also be provided between the first motor 2 and the rotating shaft.

[0046] As a possible example, in this embodiment, the second drive structure includes a second motor, a crank-connecting rod mechanism and a guide platform. The second motor is used to drive the crank of the crank-connecting rod mechanism to rotate, and the connecting rod 6 of the crank-connecting rod mechanism is hinged to the push plate 7 to push the push plate 7 to slide on the guide platform. The guide platform has a guide rail 9, which is used to guide the push plate 7. The crank-connecting rod mechanism converts the rotational motion output by the second motor into a linear reciprocating sliding of one end of the push plate 7 contacting the coil 8, thereby realizing continuous processing. However, the actual implementation is not limited to this. For example, the second drive structure can be a cylinder, and the piston rod of the cylinder is fixedly connected to the push plate 7 to drive the push plate 7 to slide reciprocatingly in a straight line. The second drive structure can also take the rotating shaft on the adjacent machine as the power, and is connected to the push plate 7 through the connecting rod 6 of the crank-connecting rod mechanism to drive the push plate 7 to slide reciprocatingly in a straight line.

[0047] As a possible example, in this embodiment, the second driving structure further includes a driving pulley 5, a driven pulley 1 and a transmission belt. The driving pulley 5 is fixed to the output shaft of the second motor, and the driving pulley 5 is connected to the driven pulley 1 through a transmission belt. The first end of the connecting rod 6 is hinged to the eccentric position of the driven pulley 1, and the second end of the connecting rod 6 is hinged to the push plate 7. When the push plate 7 encounters a jam, the transmission belt can slip, thereby providing a certain degree of safety. The diameter of the driven pulley 1 is preferably larger than the diameter of the driving pulley 5 to achieve a deceleration function.

[0048] As a possible example, in this embodiment, the shaft is horizontally arranged, the guide direction of the guide rail 9 is perpendicular to the shaft, and the angle between the guide direction of the guide rail 9 and the horizontal plane is not greater than 15°. It should be noted that the shape of the end of the push plate 7 that contacts the roll strip 8 should be such that the roll strip 8 that contacts with the push plate 7 is parallel to the shaft. Exemplarily, the end of the push plate 7 that contacts the roll strip 8 can be a vertical plane or a circular arc groove with an opening toward the shaft.

[0049] As a possible example, in this embodiment, the push plate 7 includes a plurality of push plate units, which are arranged in a straight line in a direction parallel to the rotation axis, and two adjacent push plate units are detachably fixedly connected. According to the different lengths of the coil 8, a corresponding number of push plate units can be selected for combination to improve the flexibility of the processing process.

[0050] As a possible example, in this embodiment, the first circular blade 3 and the second circular blade 4 are both connected to the rotating shaft key. The first circular blade 3 and the second circular blade 4 can be slid along the rotating shaft to achieve position adjustment, installation and removal.

[0051] As a possible example, in this embodiment, spacer blocks are provided between adjacent first circular blades 3, between adjacent second circular blades 4, and between adjacent first circular blades 3 and second circular blades 4. The spacer blocks are slidably sleeved on the rotating shaft. According to the different sizes of the paper cartridges to be produced, spacer blocks of corresponding lengths can be selected to improve the flexibility of the processing. However, the actual implementation is not limited to this. For example, the adjacent two blades can also be positioned by the shaft shoulders of the rotating shaft.

[0052] As a possible example, in this embodiment, the outer sides of the first circular blades 3 at both ends of the rotating shaft are locked by nuts, and the nuts are threadedly connected to the rotating shaft. The position of the nuts can be adjusted flexibly to meet different processing requirements.

[0053] In the present utility model, specific examples are used to illustrate the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A paper cannon tube cutting machine for firecrackers and fireworks, characterized in that: include: A cutting assembly for cutting a roll into paper cannon tubes, the cutting assembly comprising a rotating shaft, a blade and a first driving structure, the blade comprising a first circular blade and a second circular blade; the number of the first circular blades is multiple, and the multiple first circular blades are coaxially fixed on the rotating shaft; the second circular blades are arranged in pairs, a pair of the second circular blades is arranged between two adjacent first circular blades, and are coaxially fixed on the rotating shaft; the sum of the radius of the first circular blade and the diameter of the roll is not greater than the sum of the radius of the second circular blade and 5 mm; the first driving structure is used to drive the rotating shaft to rotate; A pushing assembly for pushing the coil, the pushing assembly comprising a pushing plate and a second driving structure; the second driving structure is used to push the pushing plate toward the rotating shaft, and the pushing plate is used to push the coil toward the rotating shaft; a first knife groove and a second knife groove are provided on one side of the pushing plate facing the rotating shaft; the first knife groove is used to avoid the first circular blade, and the second knife groove is used to avoid the second circular blade; A support plate is used to support the coil pushed by the push plate.

2. The paper cannon tube cutting machine for firecrackers and fireworks according to claim 1, characterized in that: It also includes a material guide, which extends between two adjacent blades and is used to guide the paper cannon tube stuck between the two adjacent blades.

3. The paper cannon tube cutting machine for firecrackers and fireworks according to claim 1, characterized in that: The first driving structure includes a first motor, and an output shaft of the first motor is connected to the rotating shaft to drive the rotating shaft to rotate.

4. The paper cannon tube cutting machine for firecrackers and fireworks according to claim 1, characterized in that: The second driving structure includes a second motor, a crank-connecting rod mechanism and a guide platform; the second motor is used to drive the crank of the crank-connecting rod mechanism to rotate, and the connecting rod of the crank-connecting rod mechanism is hinged to the push plate to push the push plate to slide on the guide platform; the guide platform has a guide rail, and the guide rail is used to guide the push plate.

5. The paper cannon tube cutting machine for firecrackers and fireworks according to claim 4, characterized in that: The second driving structure also includes a driving pulley, a driven pulley and a transmission belt; the driving pulley is fixed on the output shaft of the second motor, and the driving pulley and the driven pulley are connected through the transmission belt; the first end of the connecting rod is hinged to the eccentric position of the driven pulley, and the second end of the connecting rod is hinged to the push plate.

6. The paper cannon tube cutting machine for firecrackers and fireworks according to claim 4, characterized in that: The rotating shaft is arranged horizontally, the guiding direction of the guide rail is perpendicular to the rotating shaft, and the angle between the guiding direction of the guide rail and the horizontal plane is not greater than 15°.

7. The paper cannon tube cutting machine for firecrackers and fireworks according to claim 1, characterized in that: The push plate includes a plurality of push plate units, the plurality of push plate units are distributed in a straight line along a direction parallel to the rotating shaft, and two adjacent push plate units are detachably fixedly connected.

8. The paper cannon tube cutting machine for firecrackers and fireworks according to claim 1, characterized in that: The first circular blade and the second circular blade are both connected to the rotating shaft key.

9. The paper cannon tube cutting machine for firecrackers and fireworks according to claim 8, characterized in that: A spacer block is arranged between two adjacent first circular blades, between two adjacent second circular blades, and between the first circular blade and the second circular blade, and the spacer block is slidably sleeved on the rotating shaft.

10. The paper cannon tube cutting machine for firecrackers and fireworks according to claim 9, characterized in that: The outer sides of the first circular blades at both ends of the rotating shaft are locked by nuts, and the nuts are threadedly connected to the rotating shaft.

Images