A cigarette forming device for cigarettes having a polygonal cross section

Abstract

The utility model discloses a cigarette forming device that cigarette cross section is polygonal, including the casing, the inner wall below of casing is fixedly connected with the transverse plate, the top of transverse plate is fixedly connected with the lower mould, the upper mould is arranged above the lower mould, and the lower mould and the upper mould are provided with lower mould core and upper mould core, and the cigarette forming device that cigarette cross section is polygonal still includes conveying mechanism, and conveying mechanism sets up in the outside of transverse plate, and the replacement mechanism is provided with two groups. The utility model relates to cigarette processing technical field, and the cigarette forming device that cigarette cross section is polygonal, through the cooperation of slot, vertical hole, connecting lug, plug -in column, screw, vertical column, card bead and spring, realizes the replacement to upper mould core and lower mould core, solves the traditional mould core and is more integrated fixed structure, lacks special quick -release mechanism, and when the operation of replacing different specifications or shape's mould core is complicated and time -consuming long, still needs to debug the equipment after replacing, thereby reduced the problem of the use effect of forming mould.

Description

Technical Field

[0001] This utility model relates to the field of cigarette processing technology, specifically to a cigarette forming device with a polygonal cross-section. Background Technology

[0002] Cigarettes are tobacco products made by rolling tobacco into strips using cigarette paper. They are also known as paper cigarettes, cigarettes, or cigarette rolls. In the current tobacco market, most cigarette rolls have a cylindrical cross-section, with a homogenization rate of over 80%. Companies can only differentiate themselves by adjusting the length, thickness, or packaging of the cigarette rolls, which limits their market competitiveness. To meet the diverse needs of consumers, cigarette rolling equipment is needed to process cigarette rolls.

[0003] In traditional cigarette forming equipment, the cigarette is fed into the lower mold, and then the upper mold and lower mold are closed to press the cigarette, so that the cross-section of the cigarette is polygonal.

[0004] However, when processing different tobacco cross-sections, traditional mold cores are mostly integrated fixed structures, lacking dedicated quick-release mechanisms. Changing mold cores of different specifications or shapes is cumbersome and time-consuming, which is far from meeting the production needs of enterprises to quickly switch between multiple categories. After replacement, equipment debugging is also required, which reduces the effectiveness of the molding mold. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a cigarette forming device with a polygonal cross-section. It solves the problems of traditional mold cores being mostly integrated fixed structures, lacking dedicated quick-release mechanisms, and requiring cumbersome and time-consuming operations when changing mold cores of different specifications or shapes. After the change, the equipment also needs to be adjusted, thus reducing the effectiveness of the forming mold.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cigarette forming device with a polygonal cross-section, comprising a housing, a horizontal plate fixedly connected to the lower inner wall of the housing, a lower mold fixedly connected to the top of the horizontal plate, an upper mold disposed above the lower mold, and a lower mold core and an upper mold core disposed between the lower mold and the upper mold. The cigarette forming device with a polygonal cross-section further includes a conveying mechanism disposed outside the horizontal plate; two sets of changing mechanisms are provided, respectively disposed between the lower mold and the upper mold; and a positioning mechanism is disposed above the conveying mechanism. The conveying mechanism conveys the cigarettes, the changing mechanism quickly replaces the lower mold core and the upper mold core, and the positioning mechanism positions the conveyed cigarettes.

[0007] Preferably, the conveying mechanism includes a support column fixed to the top of the horizontal plate; a conveying roller rotatably connected to the inner wall of the support column via bearings; a conveyor belt rotatably connected to the outer wall of the conveying roller; a motor fixed to the outer wall of the support column via bolts, and an output shaft fixed to the end of the conveying roller; a feed pipe connected to the top of the housing, and extending to the top of the conveyor belt at its bottom; a discharge plate fixed to the side wall of the housing, and extending to the top of the side wall of the lower mold at its end; a pressure section disposed outside the upper mold; and an ejection section disposed below the lower mold; wherein, driven by the motor, the conveying roller causes the conveyor belt to rotate, conveying the cigarettes into the lower mold.

[0008] Preferably, the pressurizing part includes a hydraulic cylinder, which is bolted to the top of the inner wall of the housing, and the bottom output end is bolted to the top of the upper mold; a pipe is connected to the side wall of the upper mold; a pressure valve is fixed to the outer wall of the pipe; channels are respectively opened in the inner wall of the upper mold and the inner wall of the upper mold core; heating plates are respectively embedded in the inner wall of the lower mold and the inner wall of the upper mold; wherein, the hydraulic cylinder causes the upper mold and the lower mold to close, the pipe, pressure valve and channels pressurize the inside of the upper mold and the lower mold, and the heating plates heat the inside of the upper mold and the lower mold.

[0009] Preferably, the ejector portion includes a curved plate, which is fixed to the bottom of the horizontal plate near the lower mold; a first cylinder is fixed to the lower outer wall of the curved plate; an ejector pin is fixed to the top output end of the first cylinder, and the ends are respectively clearance-fitted to the inner wall of the lower mold and the inner wall of the lower mold core; wherein, driven by the first cylinder, the ejector pin ejects the formed cigarette.

[0010] Preferably, the replacement mechanism includes slots, which are respectively opened on the surface of the lower mold and the surface of the upper mold; vertical holes are respectively opened on the inner wall of the lower mold and the inner wall of the upper mold, and communicate with the slots; connecting ears are respectively fixed to the outer wall of the lower mold core and the outer wall of the upper mold core, and the outer wall is inserted into the inner wall of the slot; a plug is fixed to the inner wall of the connecting ear, and the outer wall is inserted into the inner wall of the vertical hole; a screw is threaded to the inner wall of the plug; the vertical post is attached to the bottom of the screw; a retaining ball is attached to the outer wall of the vertical post, and is respectively inserted into the inner wall of the lower mold and the inner wall of the upper mold; springs are respectively fixed to the bottom of the inner wall of the vertical hole and the bottom of the inner wall of the vertical post; wherein, when the screw is removed from the vertical post, the vertical post is reset by the spring, and the retaining ball is released, the connecting ears are driven by the upper mold core and the lower mold core to leave the slot.

[0011] Preferably, the positioning mechanism includes a first bracket, which is fixed to the top of the machine housing near the feed pipe; an infrared transmitter is fixed to the bottom of the first bracket by bolts; a second bracket is fixed to the top of the horizontal plate near the conveyor belt; a receiver is fixed to the top of the second bracket by bolts; a second cylinder is fixed to the top of the second bracket near the receiver by a connecting seat; and a disc is fixed to the output end of the second cylinder; wherein, the cigarettes on the conveyor belt surface are positioned by the cooperation of the infrared transmitter and receiver, and the cigarettes are reset by the second cylinder and the disc.

[0012] Beneficial effects

[0013] This utility model provides a cigarette forming device with a polygonal cross-section. It offers the following advantages: This polygonal cigarette forming device, through the cooperation of slots, vertical holes, connecting ears, inserts, screws, vertical columns, retaining beads, and springs, enables the replacement of the upper and lower mold cores. This solves the problems of traditional mold cores, which are mostly integrated fixed structures lacking dedicated quick-release mechanisms. Changing mold cores of different specifications or shapes is cumbersome and time-consuming, requiring equipment debugging after replacement, thus reducing the effectiveness of the forming mold.

[0014] By coordinating the first support, infrared transmitter, second support, receiver, second cylinder, and disc, the cigarette rolls on the conveyor belt are positioned, solving the problem that when the conveyor belt moves the cigarette rolls, the cigarette rolls may be vibrated by the conveyor belt and deviate, causing the cigarette rolls to fail to enter the lower mold core accurately, resulting in deviations in cigarette roll forming. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 Exploded view;

[0017] Figure 3 for Figure 2 A schematic diagram of the structure of the middle conveyor belt, the second support, and the second cylinder;

[0018] Figure 4 for Figure 1 Schematic diagram of the structure of the cross plate, hydraulic cylinder and feed pipe;

[0019] Figure 5 for Figure 4 A schematic diagram of the structure of the lower mold core, the second cylinder, and the horizontal plate;

[0020] Figure 6 for Figure 4 Schematic diagram of the upper and middle mold cores, pipes, and upper mold;

[0021] Figure 7 for Figure 5 A schematic diagram of the structure of the central vertical column, connecting lugs, and lower mold.

[0022] In the diagram: 1. Housing; 2. Horizontal plate; 3. Lower mold; 4. Upper mold; 5. Upper mold core; 6. Lower mold core; 7. Changing mechanism; 71. Slot; 72. Vertical hole; 73. Connecting ear; 74. Insert post; 75. Screw; 76. Vertical column; 77. Clamping ball; 78. Spring; 8. Conveying mechanism; 81. Support column; 82. Conveying roller; 83. Conveying belt; 84. Motor; 85. Feed pipe; 86. Discharge plate; 87. Pressurizing section; 871. Hydraulic cylinder; 872. Pipe; 873. Pressure valve; 874. Channel; 875. Heating plate; 88. Ejector section; 881. Curved plate; 882. First cylinder; 883. Ejector pin; 9. Positioning mechanism; 91. First bracket; 92. Infrared transmitter; 93. Second bracket; 94. Receiver; 95. Second cylinder; 96. Disc. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Traditional mold cores are mostly integrated fixed structures, lacking dedicated quick-release mechanisms. Changing mold cores of different specifications or shapes is cumbersome and time-consuming. After replacement, the equipment also needs to be adjusted, which reduces the effectiveness of the molding mold.

[0025] In view of this, the present invention provides a cigarette forming device with a polygonal cross-section. Through the cooperation of slots, vertical holes, connecting ears, inserts, screws, vertical columns, retaining beads and springs, the upper and lower mold cores can be replaced. This solves the problem that traditional mold cores are mostly integrated fixed structures, lacking a dedicated quick-release mechanism. Changing mold cores of different specifications or shapes is cumbersome and time-consuming, and equipment debugging is required after replacement, thus reducing the effectiveness of the forming mold.

[0026] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The following mainly introduces the working principle and process.

[0027] Example 1: By Figure 1-7It is known that a cigarette forming device with a polygonal cross-section includes a housing 1, a horizontal plate 2 fixedly connected to the lower inner wall of the housing 1, a lower mold 3 fixedly connected to the top of the horizontal plate 2, an upper mold 4 disposed above the lower mold 3, and a lower mold core 6 and an upper mold core 5 disposed between the lower mold 3 and the upper mold 4. The cigarette forming device with a polygonal cross-section also includes a conveying mechanism 8, a changing mechanism 7, and a positioning mechanism 9. The conveying mechanism 8 is disposed outside the horizontal plate 2; two sets of changing mechanisms 7 are disposed, respectively between the lower mold 3 and the upper mold 4; and the positioning mechanism 9 is disposed above the conveying mechanism 8. The conveying mechanism 8 conveys the cigarettes, the changing mechanism 7 quickly replaces the lower mold core 6 and the upper mold core 5, and the positioning mechanism 9 positions the cigarettes being conveyed.

[0028] In the specific implementation process, it is worth noting that the lower mold 3 and upper mold 4, as well as the lower mold core 6 and upper mold core 5, are made of 304 food-grade stainless steel. The interior of the lower mold core 6 and upper mold core 5 is coated with a 0.2mm polytetrafluoroethylene buffer coating, which is suitable for 6-8mm cylindrical cigarettes and supports 4-8 side regular polygons. When the cigarette is being formed, the cigarette enters the lower mold core 6, causing the upper mold 4 to drive the upper mold core 5 to descend and close with the lower mold 3. The bottom of the upper mold 4 is fixed with a sealing gasket at the contact position with the lower mold 3. The sealing gasket is made of food-grade silicone, which supports the sealing between the upper mold 4 and the lower mold 3. A sealing ring is set between the lower mold 3 and the lower mold core 6, and a sealing ring is set between the upper mold 4 and the upper mold core 5. The sealing ring is made of food-grade silicone, which increases the sealing between the two, thereby forming the cigarette. The cigarette is conveyed by the conveying mechanism 8, and the lower mold core 6 and upper mold core 5 are quickly replaced by the changing mechanism 7. The cigarette is positioned by the positioning mechanism 9.

[0029] Example 2: From Figure 1-5 As can be seen, the conveying mechanism 8 includes a support column 81, a conveyor roller 82, a conveyor belt 83, a motor 84, a feed pipe 85, a discharge plate 86, a pressurizing part 87, and an ejector part 88. The support column 81 is fixed to the top of the horizontal plate 2; the conveyor roller 82 is rotatably connected to the inner wall of the support column 81 via bearings; the conveyor belt 83 is rotatably connected to the outer wall of the conveyor roller 82; the motor 84 is fixed to the outer wall of the support column 81 via bolts, and its output shaft is fixed to the end of the conveyor roller 82; the feed pipe 85 is connected to the top of the housing 1, and its bottom extends above the conveyor belt 83; the discharge plate 86 is fixed to the side wall of the housing 1, and its end extends above the side wall of the lower mold 3; the pressurizing part 87 is located outside the upper mold 4; the ejector part 88 is located below the lower mold 3; wherein, driven by the motor 84, the conveyor roller 82 causes the conveyor belt 83 to rotate, conveying the cigarettes into the lower mold 3;

[0030] In the specific implementation process, it is worth noting that the motor 84 adopts the Panasonic A6 series servo motor MSMF042L1U2M. The connection between the motor 84 and the external controller adopts a dedicated servo power line and encoder line, which are respectively connected to the power interface and encoder interface of the PLC's matching servo drive module to achieve precise control of speed and position. The conveyor roller 82 is made of 304 stainless steel, and the conveyor belt 83 is made of food-grade PU material with arc grooves processed on its surface to limit the movement of cigarettes. The feed pipe 85 is made of food-grade PP material, and the discharge plate 86 is made of 304 stainless steel. The surface of the conveyor roller 82 is processed with anti-slip texture to increase the friction between it and the conveyor belt 83.

[0031] When conveying cigarettes, the worker puts the cigarettes into the feed pipe 85. At this time, the cigarettes at the bottom of the feed pipe 85 fall into the arc-shaped grooves on the surface of the conveyor belt 83. There are several arc-shaped grooves, which are evenly spaced. The worker starts the motor 84 through the controller. The motor 84 drives the conveyor roller 82 to rotate, and the conveyor roller 82 drives the conveyor belt 83 to rotate. The conveyor belt 83 thus moves the cigarettes. When each cigarette falls into the arc-shaped groove, the conveyor belt 83 conveys the cigarette to the lower mold 3. The cigarette moves to the lower mold core 6 through the left inclined plate of the lower mold 3. At this time, the controller stops the motor 84, and the conveyor belt 83 stops rotating to form the cigarette. When the formed cigarette is discharged from the inside of the machine casing 1 through the discharge plate 86, the controller starts the motor 84 again to continue conveying the cigarettes.

[0032] Furthermore, the pressurizing unit 87 includes a hydraulic cylinder 871, a pipe 872, a pressure valve 873, a channel 874, and a heating plate 875. The hydraulic cylinder 871 is bolted to the top of the inner wall of the housing 1, and its bottom output end is bolted to the top of the upper mold 4. The pipe 872 is connected to the side wall of the upper mold 4. The pressure valve 873 is fixed to the outer wall of the pipe 872. The channels 874 are respectively opened in the inner wall of the upper mold 4 and the inner wall of the upper mold core 5. The heating plate 875 is respectively embedded in the inner wall of the lower mold 3 and the inner wall of the upper mold 4. The hydraulic cylinder 871 causes the upper mold 4 and the lower mold 3 to close, the pipe 872, the pressure valve 873 and the channel 874 pressurize the interior of the upper mold 4 and the lower mold 3, and the heating plate 875 heats the interior of the upper mold 4 and the lower mold 3.

[0033] In the specific implementation process, it is worth noting that pressure valve 873 adopts an SMC high-precision pressure valve, model IR2020-02BG. The connection between pressure valve 873 and the external controller uses a 0-10V analog signal line, which is connected to the PLC's analog output module to complete the closed-loop regulation of pressure parameters. Pressure valve 873 is connected to an external dry and clean compressed air source. The pressurized air source is connected to the mold cavity through pipe 872. Hydraulic cylinder 871 adopts CDS1BN250-50. The connection between hydraulic cylinder 871 and the external controller is achieved by connecting a wire to the coil end of the corresponding solenoid directional valve. The control end of the solenoid directional valve is then connected to the PLC's digital output module. The extension and retraction of hydraulic cylinder 871 is controlled by the PLC output signal. Pipe 872 is made of 304 stainless steel seamless pipe. Pressure valve 873 is connected to pipe 872 through a sealing flange and bolts. Heating plate 875 is made of silicone rubber. The XH-JR-150W heating element, equipped with a K-type thermocouple (temperature measurement accuracy ±0.5℃), achieves a constant temperature of 35-40℃ inside the molding die. The heating plate 875 is connected to the external controller via a solid-state relay and analog signal feedback. The power input terminal of the heating plate 875 is connected to the output terminal of the Omron G3NA-210B solid-state relay via a wire. The control terminal of the solid-state relay is connected to the digital output module of the PLC. The PLC outputs pulse signals to adjust the on / off duration of the heating plate 875. The K-type thermocouple is connected to the analog input module of the PLC via a compensating wire to collect the mold cavity temperature signal in real time and feed it back to the controller, forming a closed-loop control. When the temperature is below 35℃, the PLC drives the solid-state relay to conduct, and the heating plate 875 starts heating. When the temperature reaches 40℃, the solid-state relay is disconnected, and heating stops. Ultimately, a constant temperature accuracy of ±1℃ is achieved in the cavity, providing temperature assurance for the molding stability of polygonal cigarettes.

[0034] During the cigarette forming process, the operator activates the heating plate 875 via the controller to heat the interior of the lower mold 3 and the upper mold 4, maintaining a constant temperature of 35-40℃ inside the lower mold 3 and the upper mold 4. After the upper mold 4 and the lower mold 3 are closed, the operator activates the external air compressor and pressure valve 873 to apply trapezoidal pressure to the upper mold 4 and the lower mold 3. The initial pressure is 0.3MPa, the holding pressure is 0.6MPa, and the internal pressure of the forming mold after pressure release is 0.1MPa, thus forming the cigarette.

[0035] Furthermore, the ejector part 88 includes a curved plate 881, a first cylinder 882, and an ejector pin 883. The curved plate 881 is fixed to the bottom of the horizontal plate 2 near the lower mold 3. The first cylinder 882 is fixed to the lower outer wall of the curved plate 881. The ejector pin 883 is fixed to the top output end of the first cylinder 882, and its ends are respectively clearance-fitted to the inner wall of the lower mold 3 and the inner wall of the lower mold core 6. The ejector pin 883, driven by the first cylinder 882, ejects the formed cigarette.

[0036] In the specific implementation process, it is worth noting that the first cylinder 882 adopts CDJ2B16-50Z. The connection between the first cylinder 882 and the external controller is to connect the coil of the matching electromagnetic reversing valve with a wire. The control terminal of the electromagnetic reversing valve is connected to the digital output module of the PLC. The cylinder is driven by the PLC signal. The ejector pin 883 adopts SKD61 hot work die steel.

[0037] After the cigarette roll is formed, the upper mold 4 leaves the lower mold 3. The controller starts the first cylinder 882, which drives the ejector pin 883 to eject the cigarette roll inside the lower mold core 6. At this time, the conveyor belt 83 transports the next cigarette roll to the lower mold 3 and pushes the formed cigarette roll onto the discharge plate 86. The controller controls the first cylinder 882 to retract, so that the ejector pin 883 returns to its initial position, thus ejecting the formed cigarette roll out of the lower mold core 6.

[0038] Furthermore, the replacement mechanism 7 includes a slot 71, a vertical hole 72, a connecting lug 73, a pin 74, a screw 75, a vertical pin 76, a retaining bead 77, and a spring 78. The slot 71 is respectively formed on the surface of the lower mold 3 and the surface of the upper mold 4; the vertical hole 72 is respectively formed on the inner wall of the lower mold 3 and the inner wall of the upper mold 4, and communicates with the slot 71; the connecting lug 73 is respectively fixed to the outer wall of the lower mold core 6 and the outer wall of the upper mold core 5, and the outer wall is inserted into the inner wall of the slot 71; the pin 74 is fixed to the inner wall of the connecting lug 73, and the outer wall is inserted into the vertical hole 75. The inner wall of hole 72; screw 75 is threaded to the inner wall of insert 74; vertical post 76 is attached to the bottom of screw 75; retaining ball 77 is attached to the outer wall of vertical post 76 and is respectively inserted into the inner wall of lower mold 3 and upper mold 4; spring 78 is respectively fixed to the bottom of the inner wall of vertical hole 72 and the lower part of the inner wall of vertical post 76; wherein, screw 75 is moved away from vertical post 76, vertical post 76 is reset by spring 78, and the retaining ball 77 is released, so that connecting ear 73 is driven away from slot 71 by upper mold core 5 and lower mold core 6;

[0039] In the specific implementation process, it is worth noting that the back of the housing 1 is connected to a baffle by bolts, the top of the screw 75 is provided with a hexagonal slot, the connecting lug 73 and the insert 74 are made of 304 stainless steel, the screw 75 is made of M8×20 internal hexagon screw, the vertical column 76 is made of 45 steel, the retaining ball 77 is made of bearing steel GCr15, and the spring 78 is made of 65Mn. The staff regularly replaces the spring 78 and easily worn parts.

[0040] When replacing the upper mold core 5 and the lower mold core 6, the worker first removes the baffle. Then, the worker inserts a wrench into the slot and rotates the wrench to rotate the screw 75, causing the screw 75 to move away from the vertical column 76. At the same time, the spring 78 returns, causing the vertical column 76 to reset. At this time, the worker moves the upper mold core 5 and the lower mold core 6. The retaining bead 77 is pressed back into the insert post 74 by the upper mold 4 and the lower mold 3, releasing the upper mold core 5 and the lower mold core 6 from their fixation and removing them. The replacement upper mold core 5 and the lower mold core 6 are then inserted into the upper mold 4 and the lower mold 3. At this time, the connecting ear 73 is inserted into the slot 71. The connecting ear 73 drives the insert post 74 to be inserted into the vertical hole 72, causing the screw 75 to rotate in the opposite direction, causing the vertical column 76 to descend and press the retaining bead 77, causing the retaining bead 77 to be inserted into the corresponding retaining hole of the upper mold 4 and the lower mold 3, thus fixing the replacement upper mold core 5 and the lower mold core 6.

[0041] Furthermore, the positioning mechanism 9 includes a first bracket 91, an infrared transmitter 92, a second bracket 93, a receiver 94, a second cylinder 95, and a disc 96. The first bracket 91 is fixed to the top of the housing 1 near the feed pipe 85; the infrared transmitter 92 is fixed to the bottom of the first bracket 91 by bolts; the second bracket 93 is fixed to the top of the horizontal plate 2 near the conveyor belt 83; the receiver 94 is fixed to the top of the second bracket 93 by bolts; the second cylinder 95 is fixed to the top of the second bracket 93 near the receiver 94 by a connecting seat; and the disc 96 is fixed to the output end of the second cylinder 95. The infrared transmitter 92 and receiver 94 work together to position the cigarettes on the surface of the conveyor belt 83, and the second cylinder 95 and disc 96 reset the cigarettes.

[0042] In the specific implementation process, it is worth noting that the infrared transmitter 92 adopts an Omron through-beam sensor E3Z-LS61. The connection method between the infrared transmitter 92 and the external controller is to connect the signal line to the digital input module of the PLC to transmit the working status signal of the transmitter to the controller. The receiver 94 adopts an Omron through-beam sensor E3Z-LS61R. The connection method between the receiver 94 and the external controller is to connect the signal line to the digital input module of the PLC to feed back the position signal of the cigarette blocking the beam to the controller. The second cylinder 95 adopts a CDJ2B10-20Z. The connection method between the second cylinder 95 and the external controller is to connect the wire to the coil of the corresponding solenoid valve. The control terminal of the solenoid valve is connected to the digital output module of the PLC. The second cylinder 95 is extended and retracted through the PLC signal to complete the cigarette reset action.

[0043] When the conveyor belt 83 moves the cigarettes, the infrared emitter 92 emits rays. If the cigarettes deviate, the rays emitted by the infrared emitter 92 on one side are blocked, and the corresponding receiver 94 cannot receive the rays. The receiver 94 triggers a positioning signal and feeds it back to the PLC. The controller immediately sends a command to stop the conveyor belt 83 and drives the corresponding second cylinder 95 to extend, driving the disc 96 to move. When the cigarette is pushed to the designated position, the center of the cigarette coincides with the beam axis. The receiver 94 resumes receiving the beam signal and feeds it back to the controller. The PLC then controls the second cylinder 95 to retract, and the conveyor belt 83 restarts, smoothly conveying the precisely positioned cigarettes to the lower mold 3, thus achieving the positioning of the cigarettes on the conveyor belt 83.

[0044] Understandably, since cigarettes consist of a roll and a butt, and these two parts have different elasticity and expansion coefficients, directly applying pressure could easily cause them to burst or spring back, leading to molding failure. Therefore, when molding different cigarettes, the lower mold core 6 and upper mold core 5 inside the lower mold 3 and upper mold 4 can be set at angled positions where they contact the cigarette roll, making the butt contact position higher than the roll contact position. This ensures uniform pressure across the entire cigarette roll. Different internal specifications of the lower mold core 6 and upper mold core 5 may be selected depending on the specific cigarette processing requirements, to accommodate the molding needs of different cigarette sizes.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cigarette forming device with a polygonal cross-section, comprising a housing (1), characterized in that: A horizontal plate (2) is fixedly connected to the lower part of the inner wall of the housing (1), a lower mold (3) is fixedly connected to the top of the horizontal plate (2), an upper mold (4) is provided above the lower mold (3), and a lower mold core (6) and an upper mold core (5) are provided between the lower mold (3) and the upper mold (4). The cigarette forming device with a polygonal cross-section further includes: The conveying mechanism (8) is located outside the horizontal plate (2); The replacement mechanism (7) is provided in two sets, and is respectively located between the lower mold (3) and the upper mold (4); A positioning mechanism (9) is disposed above the conveying mechanism (8); The cigarettes are conveyed by the conveying mechanism (8), the lower mold core (6) and the upper mold core (5) are quickly replaced by the changing mechanism (7), and the cigarettes are positioned by the positioning mechanism (9).

2. The cigarette forming device with a polygonal cross-section according to claim 1, characterized in that: The conveying mechanism (8) includes: Support column (81) is fixed to the top of the horizontal plate (2); The conveyor roller (82) is rotatably connected to the inner wall of the support column (81) via a bearing; The conveyor belt (83) is rotatably connected to the outer wall of the conveyor roller (82); The motor (84) is bolted to the outer wall of the support column (81), and its output shaft is bolted to the end of the conveyor roller (82); The feed pipe (85) is connected to the top of the housing (1) and extends to the top of the conveyor belt (83); The discharge plate (86) is fixed to the side wall of the housing (1) and its end extends above the side wall of the lower mold (3); The pressure section (87) is disposed on the outside of the upper mold (4); An ejector portion (88) is disposed below the lower mold (3); The conveyor roller (82) drives the motor (84) to rotate the conveyor belt (83) and transport the cigarettes to the lower mold (3).

3. The cigarette forming device with a polygonal cross-section according to claim 2, characterized in that: The pressurizing section (87) includes: The hydraulic cylinder (871) is bolted to the top of the inner wall of the housing (1), and the bottom output end is bolted to the top of the upper mold (4); Pipe (872) is connected to the side wall of the upper mold (4); Pressure valve (873) is fixed to the outer wall of the pipe (872); Channels (874) are respectively opened on the inner wall of the upper mold (4) and the inner wall of the upper mold core (5); Heating plates (875) are respectively embedded in the inner wall of the lower mold (3) and the inner wall of the upper mold (4); The upper mold (4) and the lower mold (3) are closed by the hydraulic cylinder (871), the upper mold (4) and the lower mold (3) are pressurized by the pipe (872), the pressure valve (873) and the channel (874), and the upper mold (4) and the lower mold (3) are heated by the heating plate (875).

4. The cigarette forming device with a polygonal cross-section according to claim 2, characterized in that: The ejector portion (88) includes: The curved plate (881) is fixed to the bottom of the horizontal plate (2) on the side near the lower mold (3); The first cylinder (882) is fixed to the lower part of the outer wall of the curved plate (881); Ejector pin (883) is fixed to the top output end of the first cylinder (882), and its ends are respectively clearance-fitted to the inner wall of the lower mold (3) and the inner wall of the lower mold core (6); The ejector pin (883) pushes out the formed cigarette roll under the drive of the first cylinder (882).

5. The cigarette forming device with a polygonal cross-section according to claim 1, characterized in that: The replacement mechanism (7) includes: Slots (71) are respectively opened on the surface of the lower mold (3) and the surface of the upper mold (4); Vertical holes (72) are respectively opened on the inner wall of the lower mold (3) and the inner wall of the upper mold (4), and are connected to the slot (71). Connecting ears (73) are respectively fixed to the outer wall of the lower mold core (6) and the outer wall of the upper mold core (5), and the outer wall is inserted into the inner wall of the slot (71); The insert (74) is fixed to the inner wall of the connecting ear (73), and its outer wall is inserted into the inner wall of the vertical hole (72); The screw (75) is threaded to the inner wall of the insert (74); The vertical column (76) is attached to the bottom of the screw (75); The bead (77) is attached to the outer wall of the vertical column (76) and is respectively inserted into the inner wall of the lower mold (3) and the inner wall of the upper mold (4); Springs (78) are respectively fixed to the bottom of the inner wall of the vertical hole (72) and the bottom of the inner wall of the vertical column (76); In this process, the screw (75) is disengaged from the vertical column (76), the vertical column (76) is reset by the spring (78), and the fixing of the retaining bead (77) is released, so that the connecting ear (73) is driven by the upper mold core (5) and the lower mold core (6) to leave the slot (71).

6. The cigarette forming device with a polygonal cross-section according to claim 2, characterized in that: The positioning mechanism (9) includes: The first bracket (91) is fixed to the top of the housing (1) on the side near the feed pipe (85); An infrared emitter (92) is bolted to the bottom of the first bracket (91); The second bracket (93) is fixed to the top of the cross plate (2) on the side near the conveyor belt (83); The receiver (94) is bolted to the top of the second bracket (93); The second cylinder (95) is fixed to the top of the second bracket (93) near the receiver (94) via a connecting seat; The disc (96) is fixed to the output end of the second cylinder (95); The cigarette rolls on the surface of the conveyor belt (83) are positioned by the cooperation of the infrared transmitter (92) and the receiver (94), and the cigarette rolls are reset by the second cylinder (95) and the disc (96).

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