Tobacco rod forming device

Abstract

The application provides a tobacco rod forming device, which comprises a base, a plurality of petals, a conveying device, a covering device and a heating mechanism. Each petal is movably installed on the base, and the plurality of petals are parallel and enclose a forming groove matching an outer diameter of a tobacco rod. The conveying device is configured to drive a paper tape and a base rod placed on the paper tape to enter the forming groove from an input end of the forming groove. The covering device is arranged at the input end and is configured to cover two sides of the paper tape onto the base rod and spray adhesive between the two sides of the paper tape to form a preliminary rod. The heating mechanism is configured to move through two adjacent petals in a radial direction of the forming groove to heat the adhesive, so that the preliminary rod forms the tobacco rod.

Description

Technical Field

[0001] At least one embodiment of this application relates to the field of cigarette manufacturing equipment, and more specifically, to a tobacco rod forming apparatus. Background Technology

[0002] Tobacco rods consist of an inner base rod and an outer paper strip. The base rod can be a tobacco tow rod, a filter fiber rod, or a composite functional rod, while the paper strip serves to fix the shape of the base rod, protect the internal materials, and provide visual identification. In related technologies, the forming cavities of tobacco rod forming devices have fixed-size structures, meaning a single set of equipment can only produce tobacco rods of one or a few specific diameters. When producing tobacco rods of different diameters is required, the machine must be stopped to disassemble and replace the entire forming cavity assembly. This not only interrupts production and reduces efficiency, but the frequent disassembly and assembly operations also easily cause wear and deformation of equipment components, affecting the equipment's lifespan and forming accuracy.

[0003] In related technologies, the heating mechanism is fixedly installed outside the forming cavity, and the heating position and range cannot be adjusted according to changes in the size of the forming cavity. When producing tobacco rods with smaller diameters, the distance between the heating mechanism and the paper strip is too large, resulting in insufficient heating of the adhesive, slow curing speed, and insufficient bonding strength. When producing tobacco rods with larger diameters, the distance between the heating mechanism and the paper strip is too small, which can easily lead to excessively high local temperatures, causing the paper strip to scorch or deform, affecting the appearance quality and performance of the tobacco rods. Summary of the Invention

[0004] To address at least one of the above-mentioned and other technical problems in the prior art, embodiments of this application provide a tobacco rod forming apparatus that can cure adhesive after wrapping paper tape onto base rods of different diameters to stably wrap the paper tape around the base rods to form tobacco rods of different outer diameters.

[0005] According to an embodiment of this application, a tobacco rod forming apparatus includes a base, multiple segments, a conveying device, a covering device, and a heating mechanism. Each segment is movably mounted on the base, and the multiple segments are parallel and form a forming groove that matches the outer diameter of the tobacco rod. The conveying device is configured to drive a paper tape and a base rod placed on the paper tape into the forming groove from the input end of the forming groove. The covering device is located at the input end and is configured to cover both sides of the paper tape onto the base rod and spray adhesive between the two sides of the paper tape to form a preliminary rod. The heating mechanism is configured to movably pass through two adjacent segments in the radial direction of the forming groove to heat the adhesive, thereby forming the preliminary rod into a tobacco rod.

[0006] According to an embodiment of this application, the tobacco rod forming apparatus further includes a driving component configured to drive the valve body to move radially along the forming groove, such that the inner diameter of the forming groove matches the outer diameter of the tobacco rod.

[0007] According to an embodiment of this application, each valve body includes a main body and a protrusion. Multiple main bodies form a molding groove, and the protrusion extends radially outward from the outer side of the main body opposite to the molding groove. The multiple valve bodies include multiple main valve bodies, a first upper valve body, and a second upper valve body. The multiple main valve bodies form the lower portion of the molding groove, and one end of the main body of each main valve body is aligned to form an input end. The first upper valve body and the second upper valve body are respectively located above the two upper edges of the lower portion of the molding groove. The first upper valve body and the second upper valve body serve as adjacent valve bodies and form an open space for the heating mechanism to enter.

[0008] According to an embodiment of this application, the heating mechanism includes a heating section, a first driving mechanism, and a controller. The heating section extends parallel to the axial direction of the forming groove. The first driving mechanism is mounted on a base. The controller is configured to control the first driving mechanism to move the heating section through an open space in a vertical direction to contact the preliminary rod, control the heating section to heat the preliminary rod to form a tobacco rod, and then control the first driving mechanism to detach the heating section from the tobacco rod.

[0009] According to an embodiment of this application, the heating element includes a heating body, a heating element, and a temperature sensor. The heating body extends parallel to the axial direction of the molding groove. The heating element is disposed inside the heating body. The temperature sensor is disposed inside the heating body and configured to detect the internal temperature of the heating body. The controller is further configured to adjust the heating power of the heating element according to the temperature detected by the temperature sensor.

[0010] According to an embodiment of this application, the inner edge of the main body of each of the first upper valve body and the second upper valve body is provided with a first limiting groove arranged at intervals in the axial direction of the forming groove, and the two valve bodies adjacent to the first upper valve body and the second upper valve body are respectively provided with limiting protrusions that cooperate with the first limiting groove.

[0011] According to an embodiment of this application, the drive assembly includes a second drive mechanism and two wrenches. Each wrench includes an arc-shaped portion with multiple connecting grooves. The two arc-shaped portions are arranged at intervals along the axial direction of the forming groove. The two ends of the protrusion can slide into the connecting grooves. The connecting grooves extend in the circumferential direction of the arc-shaped portion, and the distances between the two ends of the connecting grooves and the center of the forming groove are different. The second drive mechanism is configured to drive the two arc-shaped portions to rotate synchronously so that the connecting grooves drive the protrusions and the main body to move.

[0012] According to an embodiment of this application, the tobacco rod forming device further includes two opposing support frames, each support frame being mounted on a base, and each support frame having a plurality of radially extending second limiting grooves. The two ends of the protrusion pass through the second limiting grooves, and each segment also includes two connectors mounted at both ends of the protrusion, the connectors extending into connecting grooves, so that the second limiting grooves guide the protrusion to move radially, thereby causing the main body to move away from or towards the center of the forming groove to adjust the inner diameter of the forming groove.

[0013] According to an embodiment of this application, the ends of the main bodies of the first upper valve and the second upper valve, adjacent to the input end, are located downstream of the input end in the paper tape conveying direction. The covering device includes two covering mechanisms. One covering mechanism is formed at the end of the main body of the second upper valve adjacent to the input end. A plurality of main valves include mounting valves adjacent to the first upper valve. The other covering mechanism is mounted on the main body of the mounting valve and includes a covering body located at the input end.

[0014] According to an embodiment of this application, the coating apparatus further includes a gluing mechanism. The coating body has a radially penetrating notch to allow the gluing mechanism to apply glue through the notch when the coating body coats one side of the paper tape onto the base rod. The plurality of main flaps also include a support flap adjacent to the second upper flap. The portion of the sidewall of the main body of the support flap extends upward in a vertical plane at the input end and forms a support portion facing the notch. The support portion is adapted to prevent the portion of the paper tape extending radially outward from the lower part of the forming groove on the other side from moving radially outward during glue application by the gluing mechanism.

[0015] According to the tobacco rod forming apparatus of this application embodiment, multiple petals movably mounted on a base are provided, and the multiple petals together form a forming groove. The inner diameter of the forming groove is continuously adjustable by moving the petals along the radial direction of the forming groove. A covering device is set at the input end of the forming groove. The movement of the petals ensures that the covering device can accurately cover the paper strip onto base rods of different diameters, and adhesive is sprayed between the two sides of the paper strip to form preliminary rods of different outer diameters. As the conveying device drives the preliminary rod to continue moving away from the input end in the forming groove, the heating mechanism can heat the adhesive through two adjacent petals, so that the adhesive is cured and the paper strip stably wraps the base rod. The heating mechanism can move along the radial direction of the forming groove to ensure that the heating mechanism can maintain a suitable distance from the preliminary rod, so that the adhesive is uniformly and fully heated and cured, and the preliminary rod is formed into a tobacco rod. Furthermore, the movement of the petals allows the forming groove to be adapted to accommodate preliminary rods of different outer diameters, producing tobacco rods of different target diameters. Therefore, the tobacco rod forming device of this application can achieve continuous production of tobacco rods of different diameters without stopping the machine to replace parts, which improves production efficiency and equipment utilization, and enhances the forming quality and product qualification rate of tobacco rods. Attached Figure Description

[0016] The above and other objects, features and advantages of this application will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0017] Figure 1 A perspective view of a tobacco rod forming apparatus according to an embodiment of this application is shown schematically;

[0018] Figure 2 The illustration shows the removal Figure 1 A three-dimensional schematic diagram from a perspective behind the transmission device in the diagram;

[0019] Figure 3 Schematic illustration Figure 2 A three-dimensional schematic diagram of the device shown from another perspective;

[0020] Figure 4 The illustration shows the removal Figure 2 A three-dimensional schematic diagram from a perspective of the feeding mechanism in the middle;

[0021] Figure 5 The schematic diagram illustrates the principle of the paper tape wrapping process according to an embodiment of this application;

[0022] Figure 6 This schematically illustrates a perspective view of a combination of multiple valves and two covering mechanisms according to an embodiment of this application.

[0023] Figure 7 Schematic illustration Figure 6 A three-dimensional schematic diagram of a valve body from one perspective;

[0024] Figure 8 Schematic illustration Figure 6 The right view;

[0025] Figure 9 Schematic illustration Figure 6 The left view;

[0026] Figure 10 Schematic illustration Figure 4 The right view;

[0027] Figure 11 The illustration shows the removal Figure 10 The front view behind the driving component in the middle;

[0028] Figure 12 Schematic illustration Figure 11 A cross-sectional view along the AA direction;

[0029] Figure 13A perspective view of a heating mechanism according to an embodiment of this application is shown schematically;

[0030] Figure 14 The illustration shows the removal Figure 6 A stereoscopic diagram from another perspective showing multiple main lobe bodies within the structure;

[0031] Figure 15 Schematic illustration Figure 4 A three-dimensional schematic diagram of the device shown from another perspective;

[0032] Figure 16 Schematic illustration in Figure 6 A three-dimensional schematic diagram from another perspective of the driving components;

[0033] Figure 17 Schematic illustration in Figure 6 A three-dimensional diagram from another perspective, including the base and support frame;

[0034] Figure 18 Schematic illustration Figure 15 An enlarged schematic diagram of part A shown;

[0035] Figure 19 Schematic illustration Figure 16 An enlarged schematic diagram of part B shown;

[0036] Figure 20 Schematic illustration Figure 17 An enlarged schematic diagram of section C shown;

[0037] Figure 21 This schematic diagram illustrates a partial perspective view of the elastic component and support frame according to an embodiment of this application;

[0038] Figure 22 The illustration shows the removal Figure 10 A schematic diagram of the second panel in the middle;

[0039] Figure 23 The illustration shows the removal Figure 10 A schematic diagram showing the wrench and the second drive mechanism in the middle;

[0040] Figure 24 Schematic illustration Figure 7 A three-dimensional schematic diagram of the main lobe from another perspective;

[0041] Figure 25 Schematic illustration Figure 24 A three-dimensional schematic diagram of the connector shown;

[0042] Figure 26 A perspective view of the mounting flap according to an embodiment of this application is shown schematically;

[0043] Figure 27 A perspective view of the covering body according to an embodiment of this application is shown schematically;

[0044] Figure 28 The illustration schematically shows a perspective view of the combination of a first upper valve, a second upper valve, a supporting valve, and two covering mechanisms according to an embodiment of this application.

[0045] Figure 29 Schematic illustration Figure 28 A three-dimensional schematic diagram of the supporting valve body from another perspective;

[0046] Figure 30 The illustration shows the removal Figure 14 A three-dimensional diagram from another perspective after the main body is covered;

[0047] Figure 31 Schematic illustration Figure 30 The holding mechanism shown is illustrated from another perspective in a three-dimensional diagram.

[0048] In the accompanying drawings, the meanings of the reference numerals are as follows:

[0049] 1. Base; 11. Base plate; 12. Support leg; 10. Feeding mechanism; 100. Conveying device; 101. Paper tape; 102. Base rod; 103. Receiving groove; 104. Conveyor belt; 105. Drive wheel; 106. Motor; 107. Guide block; 108. Robotic arm feeding end; 109. Guide roller; 110. Initial rod; 2. Petal body; 21. Forming groove; 211. Open space; 22. Main body; 23. Protrusion; 24. Connecting part 241. Connector; 242. Head; 243. First nut; 244. Second mounting hole; 245. Third mounting hole; 26. Main valve body; 27. Mounting valve body; 28. Supporting valve body; 29. ​​Support part; 20. Mounting part; 21. First mounting hole; 22. First upper valve body; 33. Second upper valve body; 44. First limiting groove; 55. Limiting protrusion; 66. Covering device; 77. Adhesive application mechanism; 88. Covering mechanism; 99. Covering Main body; 321, Notch; 33, Holding mechanism; 331, Mounting body; 332, Enclosing part; 4, Heating mechanism; 41, Heating part; 411, Heating body; 412, Heating element; 413, Temperature sensor; 42, Connecting part; 43, First drive mechanism; 431, Slide table; 432, Slider; 433, Electric cylinder; 44, Supporting component; 45, Connecting component; 5, Drive assembly; 51, Second drive mechanism; 511, Cylinder body; 5 12. Piston; 513. Connecting rod; 514. Mounting base; 52. Wrench; 521. Arc-shaped part; 522. Connecting groove; 523. Drive arm; 53. Elastic component; 531. Bolt; 532. Second nut; 533. Spring; 534. Fourth mounting hole; 6. Support frame; 61. Second limiting groove; 62. First plate; 621. First protrusion; 622. Second protrusion; 63. Second plate; 64. Connecting rod; 65. Connecting block. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0051] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The terms “comprising,” “including,” etc., as used herein indicate the presence of features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0052] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0053] When using expressions such as "at least one of A, B, and C," the expression should generally be interpreted in accordance with the meaning commonly understood by those skilled in the art. For example, "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or systems having A, B, and C. Similarly, when using expressions such as "at least one of A, B, or C," the expression should generally be interpreted in accordance with the meaning commonly understood by those skilled in the art. For example, "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or systems having A, B, and C.

[0054] It should also be noted that the directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," and "right," are only for reference to the directions in the accompanying drawings and are not intended to limit the scope of protection of this application. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted where they may cause confusion in understanding this application.

[0055] The tobacco rod forming apparatus provided in this application is applied to the rod forming process in the cigarette manufacturing industry. During the tobacco rod forming process, a pre-prepared base rod is composited with a paper strip used to wrap the base rod. The paper strip is then firmly wrapped around the entire outer surface of the base rod under uniform tension. The adhesive is then cured by heating to form a complete tobacco rod with a uniform diameter and a smooth appearance. The base rod, as a component of the tobacco rod, can be made of different materials depending on the product requirements. For example, the base rod used to form the combustion section of a cigarette can be made from shredded tobacco shreds through combing, gathering, and pressing to form a tobacco shred bundle; the base rod used to form the filter section of a cigarette can be made from cellulose acetate or polypropylene fiber tow to form a filter fiber rod; and the base rod used to form the composite functional section of a cigarette can integrate functional components such as flavor capsules, activated carbon particles, and flavor threads to impart a special aroma, taste, or filtering effect to the cigarette. The formed tobacco rod can be cut into different lengths as needed and used as a cigarette stick section, filter section, or composite functional section.

[0056] Most forming devices in related technologies employ fixed-size forming cavity structures, resulting in a single set of equipment only being able to produce tobacco rods of one or a few specific diameters. With the continuous development of the tobacco market and the increasing diversification of consumer demands, tobacco manufacturers need to frequently switch between producing tobacco rods of different diameters. However, each time production specifications are switched, the equipment must be stopped, and then professional technicians must disassemble and replace the entire forming cavity components, including the forming mold, guide plate, and heating block. This process takes several hours, impacting production efficiency and equipment utilization. Furthermore, frequent disassembly and assembly not only easily cause wear, deformation, and damage to equipment components, shortening the equipment's lifespan, but also make it difficult to ensure the coaxiality and fitting accuracy between newly installed components and existing components. This can easily lead to problems such as paper tape deviation, wrinkles, and base rod jamming during subsequent production, ultimately affecting the forming quality of the tobacco rods.

[0057] Furthermore, in related technologies, the heating mechanism often employs a fixed installation method, where the heating block is fixed at a specific location outside the forming cavity, with a constant distance between it and the central axis of the forming cavity. When producing tobacco rods of different diameters, the distance between the heating block and the adhesive layer on the paper strip changes. When producing smaller diameter tobacco rods, the increased distance between the heating block and the adhesive layer reduces the heat transferred from the heating block to the adhesive, resulting in insufficient heating and slower curing. This not only reduces production speed but also easily leads to weak adhesion of the paper strip, causing problems with glue separation at the joints during subsequent cutting, conveying, and packaging. When producing larger diameter tobacco rods, the decreased distance between the heating block and the adhesive layer results in excessive heat transferred from the heating block to the adhesive, leading to excessively high local temperatures. This not only causes the adhesive to over-cur and lose elasticity but also easily scorches or yellows the paper strip and may even cause thermal degradation of the tobacco shreds or fiber materials inside the rod, affecting the smoking flavor and performance of the tobacco rod.

[0058] Meanwhile, the coating and gluing mechanisms in related technologies are mostly fixed structures, which cannot be matched with adjustable forming cavities. When the inner diameter of the forming cavity changes, the coating trajectory and gluing position of the paper strip will also change accordingly. However, the fixed coating and gluing mechanisms cannot automatically adjust to these changes, easily leading to problems such as uneven paper strip coating, uneven tension on both sides, glue position deviation, and excessive or insufficient glue application. These problems can result in quality defects in tobacco rods, such as uneven diameter, rough surface, paper strip wrinkles, and excessively large or small gaps at the overlap, affecting the product's appearance quality and performance, reducing the product's pass rate and market competitiveness.

[0059] Figure 1 A perspective view of a tobacco rod forming apparatus according to an embodiment of this application is shown schematically. Figure 2 The illustration shows the removal Figure 1 A three-dimensional schematic diagram from a perspective behind the transmission device. Figure 3 Schematic illustration Figure 2 A three-dimensional schematic diagram of the device shown from another perspective. Figure 4 The illustration shows the removal Figure 2 A three-dimensional schematic diagram from the perspective of the feeding mechanism.

[0060] like Figures 1-4 As shown, the tobacco rod forming apparatus includes a base 1, multiple segments 2, a conveying device 100, a covering device 3, and a heating mechanism 4. Each segment 2 is movably mounted on the base 1, and the multiple segments 2 are parallel and form a forming groove 21 that matches the outer diameter of the tobacco rod. The conveying device 100 is configured to drive a paper strip 101 and a base rod 102 placed on the paper strip 101 into the forming groove 21 from the input end of the forming groove 21. The covering device 3 is located at the input end and is configured to cover both sides of the paper strip 101 onto the base rod 102 and spray adhesive between the two sides of the paper strip 101 to form a preliminary rod 110. The heating mechanism 4 is configured to movably pass through two adjacent segments 2 in the radial direction of the forming groove 21 to heat the adhesive, so that the preliminary rod 110 forms a tobacco rod.

[0061] In some exemplary embodiments, the tobacco rod forming apparatus provided in this application further includes a feeding mechanism 10. The feeding mechanism 10 has an arc-shaped receiving groove 103 to receive a paper strip 101 and a base rod 102 placed on the paper strip 101. The paper strip 101 is pressed into a U-shape by the groove wall of the receiving groove 103 to partially conform to the outer periphery of the base rod 102, and the opposite first and second sides of the paper strip 101 both extend from the receiving groove 103. A plurality of petals 2 extend parallel to the extending direction of the receiving groove 103 and form a forming groove 21 that is connected to and coaxial with the receiving groove 103. The conveying device 100 includes a conveyor belt 104 that passes through the receiving groove 103 and the forming groove 21 and is located at the bottom of the receiving groove 103 and the forming groove 21. The conveying device 100 also includes a paper storage tray and a guide roller 109. The paper strip 101 is wound around the paper storage tray, and the guide roller 109 is located at the feeding end of the receiving groove 103 away from the covering device 3. The paper strip 101 released from the paper storage tray passes around the guide roller 109 and then attaches to the conveyor belt 104 so that the conveyor belt 104 drives the paper strip 101 into the receiving groove 103. The robotic arm unloading end 108 is movably disposed above the feeding mechanism 10. The lower end of the robotic arm unloading end 108 is provided with multiple suction heads to pick up the base rods 102 from the storage bin of the base rods 102 and place the base rods 102 onto the surface of the paper strip 101 from top to bottom through the upper open area of ​​the receiving groove 103.

[0062] In some exemplary embodiments, the feeding mechanism 10 is positioned upstream of the input end of the forming trough 21 in the conveying direction of the paper tape 101. The receiving trough 103 extends along the conveying direction of the paper tape 101, and the cross-section of the receiving trough 103 is approximately semi-circular. The conveying device 100 also includes a guide block 107 disposed at the feeding end of the receiving trough 103 away from the covering device 3. This guide block 107 has a guide groove flush with the receiving trough 103. The opening width of the guide groove gradually decreases along the axial direction of the receiving trough 103 toward the feeding mechanism 10. The cross-section of the guide groove near the receiving trough 103 is adapted to the inlet cross-section of the receiving trough 103. After the planar paper tape 101, which bypasses the guide roller 109, enters the guide groove with the conveyor belt 104, the two sides of the paper tape 101 gradually bend upward under the constraint of the gradually rising side walls on both sides of the guide groove, so as to avoid the paper tape 101 from wrinkling or shifting left and right before entering the receiving trough 103. The transmission device 100 also includes a drive wheel 105, a motor 106, and a guide block 107 disposed on the discharge end of the forming trough 21 away from the feeding mechanism 10. This guide block 107 also has a guide groove. The conveyor belt 104 is wound around the drive wheel 105 and passes through the receiving trough 103, the forming trough 21, and the two guide grooves. The motor 106 is configured to drive the drive wheel 105 to rotate so that the conveyor belt 104 moves cyclically along the extension direction of the receiving trough 103 and the forming trough 21, so that the conveyor belt 104 drives the paper tape 101 and the base rod 102 to be output from the output end of the receiving trough 103, and then enter the forming trough 21 from the input end of the forming trough 21, and move towards the discharge end along the axial direction of the forming trough 21.

[0063] According to the above embodiments of this application, by setting the feeding mechanism 10, the base rod 102 and paper tape 101 can be pre-arranged and smoothly and accurately conveyed to the input end of the forming tank 21, providing a good foundation for subsequent coating and forming processes. The receiving tank 103 in the feeding mechanism 10 can pre-press the paper tape 101 into a U-shape, so that the middle part of the paper tape 101 is attached to the bottom of the base rod 102, and the two sides of the paper tape 101 extend upward, which facilitates the subsequent coating device 3 to coat the two sides of the paper tape 101 onto the upper surface of the base rod 102.

[0064] In some exemplary embodiments, the coating device 3 is positioned at the input end of the forming groove 21. During the process of the base rod 102 and paper strip 101 entering the forming groove 21, it bends both sides of the paper strip 101 and wraps it around the outer surface of the base rod 102. Simultaneously, it sprays adhesive between the overlapping areas of the paper strip 101, causing the paper strip 101 to adhere to the base rod 102, forming a preliminary rod 110. The heating mechanism 4 is positioned above the forming groove 21 and can move radially along the forming groove 21. It passes through the gap between two adjacent segments 2 and enters the interior of the forming groove 21 to heat and cure the adhesive on the preliminary rod 110, causing the paper strip 101 to firmly adhere to the base rod 102, forming a structurally complete and qualified tobacco rod product. Multiple petals 2 are movably mounted on the base 1 and together form a forming groove 21 that runs through the conveying direction of the base rod 102 and the paper tape 101. The cross-section of the forming groove 21 is approximately circular, which is used to accommodate and guide the base rod 102 and the paper tape 101 to pass through, and to prevent the base rod 102 and the paper tape 101 from moving radially, so as to ensure that they maintain the correct position and posture during the conveying process.

[0065] In some exemplary embodiments, the base 1 includes a base plate 11 and support legs 12. The base plate 11 is a long, strip-shaped plate structure made of a high-strength, high-rigidity metal material, such as stainless steel or aluminum alloy, to ensure sufficient load-bearing capacity and resistance to deformation, stably supporting the weight of the entire device and maintaining good flatness and stability during equipment operation. The support legs 12 are disposed at the bottom of the base plate 11 to support the base plate 11 on the ground and to adjust the levelness and height of the base plate 11. The number of support legs 12 is, for example, four to eight, evenly distributed at the bottom edge of the base plate 11 to ensure the stability of the support.

[0066] In some exemplary embodiments, such as Figure 4 As shown, after removing the conveying device 100 and the feeding mechanism 10, it can be seen more clearly that multiple petal bodies 2 are arranged parallel to each other along the axial direction of the forming groove 21, and the length direction of each petal body 2 is consistent with the axial direction of the forming groove 21. Multiple petal bodies 2 are evenly spaced along the circumferential direction of the forming groove 21, collectively forming a cylindrical forming groove 21. Each petal body 2 can move independently along the radial direction of the forming groove 21. When all petal bodies 2 move simultaneously towards the central axis of the forming groove 21, the inner diameter of the forming groove 21 decreases; when all petal bodies 2 move simultaneously away from the central axis of the forming groove 21, the inner diameter of the forming groove 21 increases. In this way, the inner diameter of the forming groove 21 can be continuously adjusted, allowing it to be matched with base rods 102, preliminary rods 110, and tobacco rods of different outer diameters.

[0067] In some exemplary embodiments, the number of valves 2 is, for example, five, six, seven, or eight. Each valve 2 is made of a high-strength, wear-resistant, and corrosion-resistant metal material, such as stainless steel or hard aluminum alloy, to ensure that it has sufficient strength and rigidity to withstand the friction and extrusion forces generated by the base rod 102 and the paper tape 101 during transport, while also having a long service life. The inner surface of the valve 2 is precision polished to have a high degree of smoothness, thereby reducing the friction between it and the paper tape 101 and preventing the paper tape 101 from being scratched or worn during transport.

[0068] According to the above embodiments of this application, by employing a structural design in which multiple radially movable petals 2 together form a forming groove 21, the inner diameter of the forming groove 21 is continuously adjustable. Compared with a fixed-size forming cavity, this structural design eliminates the need to stop the machine to replace parts. The inner diameter of the forming groove 21 can be quickly adjusted by driving the petals 2 to move, thereby adapting to the production needs of tobacco rods with different diameter specifications, improving production efficiency and equipment utilization. At the same time, the synchronous movement of multiple petals 2 ensures that the forming groove 21 maintains good roundness and coaxiality during adjustment, avoiding problems such as stick jamming of the base rod 102 and paper tape 101 deviation caused by deformation of the forming cavity, thus improving the forming quality of the tobacco rod.

[0069] Figure 5 The schematic diagram illustrates the principle of the paper tape wrapping process according to an embodiment of this application.

[0070] like Figure 5 As shown, the wrapping process of paper tape 101 is divided into four stages. Figure 5 Part (a) shows the preforming stage, in which the paper strip 101 is pressed into a U-shape in the receiving groove 103 of the feeding mechanism 10, the base rod 102 is placed at the bottom of the U-shaped paper strip 101, and the two sides of the paper strip 101 extend upward. Figure 5 Part (b) shows the first side covering stage, when the base rod 102 and the paper tape 101 are conveyed by the conveying device 100 to the input end of the forming tank 21, a covering mechanism 31 in the covering device 3 first bends the first side of the paper tape 101 and covers it to the upper surface of the base rod 102. Figure 5 Part (c) shows the adhesive application stage, after the first side of the paper tape 101 is wrapped onto the base rod 102, the adhesive application mechanism 30 immediately sprays adhesive onto the outer surface of the first side of the paper tape 101 and / or the inner surface of the second side. Figure 5 Part (d) shows the second side covering stage. After the adhesive is applied, another covering mechanism 31 in the covering device 3 bends the second side of the paper strip 101 and covers it onto the outer surface of the first side, so that the two sides of the paper strip 101 overlap. The adhesive glue bonds the two sides of the paper strip 101 together to form a preliminary rod 110.

[0071] In some exemplary embodiments, the paper strip 101 is made of special cigarette forming paper, possessing certain strength, toughness, and air permeability, capable of firmly wrapping the base rod 102 while ensuring smooth passage of smoke. The width of the paper strip 101 is determined according to the diameter of the base rod 102, for example, 1.1 to 1.3 times the circumference of the base rod 102, to ensure sufficient overlap on both sides of the paper strip 101 for a firm bond. The adhesive used is, for example, food-grade hot melt adhesive or water-based adhesive, characterized by being non-toxic, odorless, having high bonding strength, and fast curing speed, thus meeting the process requirements for tobacco rod forming.

[0072] According to the above embodiments of this application, by adopting a step-by-step wrapping process of first wrapping the first side, then applying adhesive, and finally wrapping the second side, precise coordination of wrapping and adhesive application of the paper strip 101 is achieved. Compared with the process of applying adhesive before wrapping or wrapping before applying adhesive, this process avoids the problems of premature drying and curing of the adhesive, rubbing off, or contamination in the process of applying adhesive before wrapping, and also avoids the problems of insufficient adhesive application and bonding strength in the process of wrapping before applying adhesive, which cannot apply adhesive to the inner overlapping surface of the paper strip 101. It can ensure that the adhesive is accurately applied to the overlapping surface of the paper strip 101, and the wrapping of the second side is completed immediately before the adhesive dries, thereby obtaining a good bonding effect and improving the structural stability and quality reliability of the tobacco rod.

[0073] According to the above embodiments of this application, by setting multiple petals 2, such as seven petals 2, that can be movably installed on the base 1, and by having multiple petals 2 together form a forming groove 21, the inner diameter of the forming groove 21 can be continuously adjusted by moving the petals 2 along the radial direction of the forming groove 21. The covering device 3 is set at the input end of the forming groove 21. The movement of the petals 2 ensures that the covering device 3 can accurately cover the paper tape 101 onto the base rods 102 of different diameters, and the adhesive is sprayed between the two sides of the paper tape 101 to form preliminary rods 110 of different outer diameters. As the conveying device 100 drives the preliminary rod 110 to continue moving away from the input end within the forming groove 21, the heating mechanism 4 can heat the adhesive through two adjacent segments 2, causing the adhesive to solidify so that the paper tape 101 stably wraps around the base rod 102. The heating mechanism 4 can move radially along the forming groove 21, ensuring that the heating mechanism 4 maintains a suitable distance from the preliminary rod 110, allowing the adhesive to be heated and solidified uniformly and sufficiently, thus forming the preliminary rod 110 into a tobacco rod. Furthermore, the movement of the segments 2 allows the forming groove 21 to adapt to accommodate preliminary rods 110 with different outer diameters, producing tobacco rods with different target diameters. Therefore, the tobacco rod forming apparatus of this application can achieve continuous production of tobacco rods of different diameters without stopping the machine to replace parts, improving production efficiency and equipment utilization, and enhancing the forming quality and product qualification rate of the tobacco rods.

[0074] Figure 6 The illustration schematically shows a perspective view of a combination of multiple lobes and two covering mechanisms according to an embodiment of the present application. Figure 7 Schematic illustration Figure 6 The diagram shown is a three-dimensional representation of a valve from one perspective. Figure 8 Schematic illustration Figure 6 The right view. Figure 9 Schematic illustration Figure 6 The left view. Figure 10 Schematic illustration Figure 4 The right view. Figure 11 The illustration shows the removal Figure 10 The front view after the driver component in the middle. Figure 12 Schematic illustration Figure 11 A cross-sectional view along the AA direction.

[0075] like Figures 6-12 As shown, the tobacco rod forming apparatus also includes a drive assembly 5, which is configured to drive the valve bodies 2 to move radially along the forming groove 21, such that the inner diameter of the forming groove 21 matches the outer diameter of the tobacco rod. Each valve body 2 includes a main body 22 and a protrusion 23. Multiple main bodies 22 surround the forming groove 21, and the protrusion 23 extends radially outward from the outer side of the main body 22 opposite to the forming groove 21. The multiple valve bodies 2 include multiple main valve bodies 25, a first upper valve body 26, and a second upper valve body 27. The multiple main valve bodies 25 form the lower portion of the forming groove 21, and one end of the main body portion 22 of the multiple main valve bodies 25 is aligned to form an input end. The first upper valve body 26 and the second upper valve body 27 are respectively located above the two upper edges of the lower portion of the forming groove 21. The first upper valve body 26 and the second upper valve body 27 serve as two adjacent valve bodies 2 and form an open space 211 for the heating mechanism 4 to enter.

[0076] According to an embodiment of this application, the heating mechanism 4 includes a heating part 41, a first driving mechanism 43, and a controller. The heating part 41 extends axially parallel to the forming groove 21. The first driving mechanism 43 is mounted on the base 1. The controller is configured to control the first driving mechanism 43 to drive the heating part 41 through the open space 211 in a vertical direction to contact the preliminary rod 110, control the heating part 41 to heat the preliminary rod 110 to form a tobacco rod, and then control the first driving mechanism 43 to drive the heating part 41 to detach from the tobacco rod.

[0077] In some exemplary embodiments, such as Figure 6 and Figure 7As shown, each petal 2 includes a main body 22 and a protrusion 23. The main body 22 is elongated, and its length direction is aligned with the axial direction of the forming groove 21. The inner surface of the main body 22 is an arc surface, and the inner surfaces of multiple main bodies 22 together form the groove wall of the forming groove 21. The two side walls connecting the inner and outer walls of the main body 22 are non-parallel, so that the width of the cross-section taken in the extending direction of the main body 22 gradually increases radially outward along the forming groove 21, ensuring that the main body 22 has sufficient strength and rigidity. The protrusion 23 extends radially outward integrally from the outer surface of the main body 22 opposite to the forming groove 21. The length of the protrusion 23 is less than the length of the main body 22, and the cross-sectional shape of the protrusion 23 is approximately rectangular.

[0078] In some exemplary embodiments, such as Figure 8 and Figure 9 As shown, the plurality of valves 2 includes a plurality of main valves 25, a first upper valve 26, and a second upper valve 27. The plurality of main valves 25 form the lower portion of the forming groove 21, and one end of the main body portion 22 of the plurality of main valves 25 is aligned to form the input end of the forming groove 21. The number of main valves 25 is, for example, four to six; for example, when the number of valves 2 is seven, the number of main valves 25 is five. The plurality of main valves 25 are evenly distributed at intervals on the semicircle of the lower half of the forming groove 21, for bearing the weight of the base rod 102 and the paper tape 101, and for radially constraining their lower half. The first upper valve 26 and the second upper valve 27 are respectively located above the two upper edges of the lower part of the forming groove 21, symmetrically arranged on both sides of the central axis of the forming groove 21. The first upper petal 26 and the second upper petal 27 serve as two adjacent petals 2 that allow the heating part 41 to pass radially through. Their inner surfaces are also arc-shaped, forming the wall of the complete forming groove 21 together with the inner surface of the main petal 25. A certain gap is left between the first upper petal 26 and the second upper petal 27, forming an open space 211 for the heating mechanism 4 to enter. Thus, the open space 211 is formed directly above the forming groove 21, allowing the heating mechanism 4 to move up and down along the radial direction (vertical direction) of the forming groove 21 from above. The width of the open space 211 is slightly larger than the width of the heating part 41 of the heating mechanism 4, to ensure that the heating part 41 can smoothly pass through the open space 211 into the interior of the forming groove 21, while not being too large to affect the radial constraint effect of the forming groove 21 on the initial rod 110.

[0079] According to the above embodiments of this application, by dividing the multiple petals 2 into a main petal 25, a first upper petal 26, and a second upper petal 27, and forming an open space 211 between the first upper petal 26 and the second upper petal 27, it is ensured that the molding groove 21 has a complete groove wall structure, which can effectively constrain the base rod 102 and the preliminary rod 110. It also provides a channel for the heating mechanism 4 to enter the interior of the molding groove 21, allowing the heating mechanism 4 to directly heat and cure the adhesive on the preliminary rod 110, thus improving heating efficiency and heating uniformity. Simultaneously, the first upper petal 26 and the second upper petal 27 can also move radially synchronously with the other petals 2, ensuring that the position and size of the open space 211 can be adjusted according to the change in the inner diameter of the molding groove 21, matching the heating part 41 of the heating mechanism 4.

[0080] Figure 13 A perspective view of a heating mechanism according to an embodiment of this application is shown schematically.

[0081] like Figure 13 As shown, the heating unit 41 includes a heating body 411, a heating element 412, and a temperature sensor 413. The heating body 411 extends axially parallel to the molding groove 21. The heating element 412 is disposed inside the heating body 411. The temperature sensor 413 is disposed inside the heating body 411 and is configured to detect the internal temperature of the heating body 411. The controller is further configured to adjust the heating power of the heating element 412 according to the temperature detected by the temperature sensor 413.

[0082] In some exemplary embodiments, such as Figures 10-13 As shown, the heating mechanism 4 includes a heating section 41, a first drive mechanism 43, and a controller (not shown). The heating section 41 extends parallel to the axial direction of the forming groove 21, and its length matches the extension length of the open space 211, enabling uniform heating of the entire length of the initial rod 110. The first drive mechanism 43 is mounted on the base 1 and is used to drive the heating section 41 to move up and down along the radial direction of the forming groove 21. The controller is electrically connected to the first drive mechanism 43 and the heating section 41 and is used to control the operation of the first drive mechanism 43 and the heating power of the heating section 41. A connecting section 42 extends from the side of the heating section 41 away from the forming groove 21, and the first drive mechanism 43 drives the connecting section 42 to move the heating section 41 in a reciprocating linear motion in the vertical direction.

[0083] In some exemplary embodiments, the heating element 41 includes a heating body 411, a heating element 412, and a temperature sensor 413. The heating body 411 is a long, strip-shaped block structure made of a metal material with good thermal conductivity, such as copper or aluminum alloy, to ensure that heat can be quickly and evenly transferred to the adhesive layer on the initial rod 110. The heating body 411 extends parallel to the axial direction of the forming groove 21, and the thickness of the heating body 411 in the axial direction perpendicular to the forming groove 21 decreases vertically downwards, so that the lower end of the heating body 411 can smoothly pass through the top opening of the forming groove 21 to contact the initial rod 110, and avoids interference with the movement of the flap 2.

[0084] In some exemplary embodiments, the heating element 412 is disposed inside the heating body 411 and extends along the length of the heating body 411. The heating element 412 can be an electric heating element, a ceramic heating element, or an infrared heating element, such as an electric heating element, because electric heating elements have advantages such as fast heating speed, high temperature control accuracy, and long service life. The temperature sensor 413 is also disposed inside the heating body 411, close to the lower surface of the heating body 411, for real-time detection of the internal temperature of the heating body 411. The temperature sensor 413 can be a thermocouple, a resistance temperature detector (RTD), or a thermistor, such as a thermocouple, because thermocouples have advantages such as wide temperature measurement range, high accuracy, and good stability.

[0085] In some exemplary embodiments, the first drive mechanism 43 includes a slide table 431, a slider 432, and an electric cylinder 433. The slide table 431 is vertically arranged and mounted on the base 1 via a support member 44. The slider 432 is slidably mounted on the slide table 431 and can move up and down along the slide table 431. The electric cylinder 433 is mounted on the top of the slide table 431, and its output shaft is connected to the slider 432 for driving the slider 432 to move up and down along the slide table 431. The heating unit 41 is fixedly connected to the slider 432 via a connecting part 42 and a connecting member 45. When the slider 432 moves up and down, it drives the heating unit 41 to move up and down synchronously. In some embodiments, the electric cylinder can be replaced by a pneumatic cylinder or a hydraulic cylinder.

[0086] In some exemplary embodiments, the support member 44 is an L-shaped integrally molded plate, including a horizontal mounting part and a vertical support part. The horizontal mounting part is a rectangular plate structure with four elongated mounting holes spaced apart along its length. Bolts pass through the elongated mounting holes to secure the horizontal mounting part to the upper surface of the base 1. The elongated mounting holes allow the support member 44 to be finely adjusted along the axial direction of the molding groove 21 to ensure the coaxiality of the heating part 41 and the molding groove 21. The vertical support part is arranged perpendicularly to the horizontal mounting part. The height of the vertical support part is greater than the total height of the slide table 431, and the width is greater than the width of the slide table 431. The side wall of the vertical support part facing the molding groove 21 is a flat mounting surface. The slide table 431 is secured to this mounting surface by bolts. Two reinforcing ribs extending vertically are provided on the side wall of the vertical support part away from the slide table 431. The reinforcing ribs are integrally connected to the upper surface of the horizontal mounting part to enhance the bending stiffness of the support member 44 and prevent the heating part 41 from shaking during movement and heating.

[0087] In some exemplary embodiments, the connecting component 45 is a rectangular block structure made of aluminum alloy. The first side of the connecting component 45 is fitted against the end face of the connecting part 42 facing away from the heating part 41. Two threaded holes are spaced apart on the first side. Bolts pass through the corresponding through holes on the connecting part 42 and are screwed into the threaded holes to securely connect the connecting component 45 to the connecting part 42. The second side of the connecting component 45 is fitted against the end face of the slider 432 facing the forming groove 21. Four threaded holes are provided on the second side in a rectangular arrangement. Bolts pass through the corresponding through holes on the slider 432 and are screwed into the threaded holes to securely connect the connecting component 45 to the slider 432. Both the upper and lower end faces of the connecting component 45 are flat and parallel to the horizontal direction. All four corners are rounded to prevent scratching operators during installation and operation. The connecting component 45 is made of heat-insulating material such as aluminum alloy, which can ensure sufficient connection strength and effectively block the heat generated by the heating part 41 from being transferred to the first drive mechanism 43, preventing the electric cylinder 433 and the slider 432 from deteriorating or being damaged due to excessive temperature.

[0088] In some exemplary embodiments, the controller is configured to control the first drive mechanism 43 to move the heating part 41 vertically through the open space 211 to contact the preliminary rod 110, control the heating part 41 to heat the preliminary rod 110 to form a tobacco rod, and then control the first drive mechanism 43 to move the heating part 41 away from the tobacco rod. Specifically, when the preliminary rod 110 enters the heating area, the controller first controls the electric cylinder 433 to drive the slider 432 downward, driving the heating part 41 through the open space 211 between the first upper petal 26 and the second upper petal 27 into the forming groove 21, until the lower surface of the heating body 411 contacts the outer surface of the preliminary rod 110; then, the controller controls the heating tube 412 to be energized and heat up to cure the adhesive on the preliminary rod 110; when the heating time reaches a preset value and the adhesive is cured, the controller controls the electric cylinder 433 to drive the slider 432 upward, driving the heating part 41 away from the tobacco rod and back to the initial position, waiting for the next preliminary rod 110 to enter the heating area.

[0089] Simultaneously, the controller is further configured to adjust the heating power of the heating element 412 based on the temperature detected by the temperature sensor 413. Specifically, the temperature sensor 413 detects the internal temperature of the heating body 411 in real time and sends the temperature signal to the controller. The controller compares the detected temperature with a preset target temperature. If the detected temperature is lower than the target temperature, the controller increases the heating power of the heating element 412, raising the temperature of the heating body 411. If the detected temperature is higher than the target temperature, the controller decreases the heating power of the heating element 412, lowering the temperature of the heating body 411. Through this temperature control method, the temperature of the heating body 411 can be precisely controlled within the preset target temperature range, ensuring that the adhesive achieves a suitable heating and curing effect and avoiding the impact on bonding quality due to excessively high or low temperatures.

[0090] According to the above embodiments of this application, by employing a radially movable heating mechanism 4 and installing a heating tube 412 and a temperature sensor 413 inside the heating section 41, precise heating and temperature control of the adhesive on the preliminary rod 110 are achieved. Compared with a fixed heating mechanism, this heating mechanism 4 can adjust the heating position according to the change in the inner diameter of the forming groove 21, ensuring that the heating body 411 can contact the outer surface of the preliminary rod 110, so that the adhesive is heated and cured evenly and fully. At the same time, the closed-loop temperature control method can accurately control the heating temperature within a suitable range, avoiding the problem of scorching the paper tape 101 or the base rod 102 due to excessive temperature, and also avoiding the problem of insufficient curing of the adhesive and insufficient bonding strength due to excessively low temperature, thereby improving the bonding quality and product qualification rate of tobacco rods.

[0091] Figure 14The illustration shows the removal Figure 6 A stereoscopic diagram from another perspective behind multiple main lobe bodies.

[0092] like Figure 14 As shown, the inner edge of the main body 22 of each of the first upper valve body 26 and the second upper valve body 27 is provided with a first limiting groove 28 arranged at intervals in the axial direction of the forming groove 21, and the two valve bodies 2 adjacent to the first upper valve body 26 and the second upper valve body 27 in the main valve body 25 are respectively provided with limiting protrusions 29 that cooperate with the first limiting groove 28.

[0093] In some exemplary embodiments, an open space 211 is formed between the first upper valve body 26 and the second upper valve body 27. A plurality of first limiting grooves 28 are spaced apart on the sidewalls of the main body portions 22 of the first upper valve body 26 and the second upper valve body 27 opposite to the open space 211. A limiting protrusion 29 is a block-shaped structure protruding upward from the upper edge of the main body portion 22 of the main valve body 25. The shape and size of the limiting protrusion 29 are adapted to the first limiting grooves 28. The limiting protrusion 29 extends into the first limiting grooves 28 to prevent relative axial movement of the first upper valve body 26 and the second upper valve body 27 relative to the main valve body 25. When the initial rod 110 is axially conveyed within the forming groove 21, the outer surface of the paper tape 101 can contact the inner wall of the forming groove 21 uniformly and smoothly, avoiding scratching, pulling, wrinkling, damage, or overlap displacement of the paper tape 101 due to misalignment of the inner wall.

[0094] Figure 15 Schematic illustration Figure 4 A three-dimensional schematic diagram of the device shown from another perspective. Figure 16 Schematic illustration in Figure 6 This is a three-dimensional diagram from another perspective, including the driver components. Figure 17 Schematic illustration in Figure 6 A three-dimensional diagram from another perspective, including the base and support frame. Figure 18 Schematic illustration Figure 15 An enlarged schematic diagram of part A shown. Figure 19 Schematic illustration Figure 16 An enlarged schematic diagram of part B is shown. Figure 20 Schematic illustration Figure 17 An enlarged schematic diagram of section C is shown. Figure 21 A perspective view of a portion of the structure of the elastic component and support frame according to an embodiment of this application is shown schematically. Figure 22 The illustration shows the removal Figure 10 A schematic diagram of the second panel in the diagram. Figure 23 The illustration shows the removal Figure 10 A schematic diagram showing the wrench and the second drive mechanism. Figure 24Schematic illustration Figure 7 A three-dimensional schematic diagram of the main lobe from another perspective. Figure 25 Schematic illustration Figure 24 A three-dimensional schematic diagram of the connector shown.

[0095] like Figures 15-25 As shown, the drive assembly 5 includes a second drive mechanism 51 and two wrenches 52. Each wrench 52 includes an arc-shaped portion 521 with multiple connecting grooves 522. The two arc-shaped portions 521 are arranged at intervals along the axial direction of the forming groove 21. The two ends of the protrusion 23 can slide into the connecting groove 522. The connecting groove 522 extends in the circumferential direction of the arc-shaped portion 521, and the distance between the two ends of the connecting groove 522 and the center of the forming groove 21 is different. The second drive mechanism 51 is configured to drive the two arc-shaped portions 521 to rotate synchronously so that the connecting groove 522 drives the protrusion 23 and the main body portion 22 to move.

[0096] According to an embodiment of this application, the tobacco rod forming device further includes two opposing support frames 6, each support frame 6 being mounted on the base 1, and each support frame 6 having a plurality of radially extending second limiting grooves 61. The two ends of the protrusion 23 pass through the second limiting grooves 61, and each petal 2 also includes two connectors 24 mounted at both ends of the protrusion 23. The connectors 24 extend into a connecting groove 522, causing the second limiting grooves 61 to guide the protrusion 23 to move radially, thereby causing the main body 22 to move away from or towards the center of the forming groove 21 to adjust the inner diameter of the forming groove 21.

[0097] In some exemplary embodiments, such as Figure 10 , Figure 11 and Figure 12As shown, the drive assembly 5 includes a second drive mechanism 51 and two wrenches 52. The second drive mechanism 51 is mounted on the side of the base 1 and provides driving force to drive the two wrenches 52 to rotate synchronously. Each wrench 52 includes an arc-shaped portion 521 and a drive arm 523. The arc-shaped portion 521 is a roughly semi-circular plate-like structure, and its central axis coincides with the central axis of the forming groove 21. The arc-shaped portion 521 is provided with a plurality of connecting grooves 522, the number of which is equal to the number of petal bodies 2, and they are fitted one-to-one onto the ends of the protrusions 23 of the petal bodies 2. The connecting grooves 522 extend obliquely in the circumferential direction of the arc-shaped portion 521, and the distances between the two ends of the connecting groove 522 and the center of the forming groove 21 are different. Specifically, the distance between the end of the connecting groove 522 near the outer periphery of the arc-shaped portion 521 and the center of the forming groove 21 is larger, and the distance between the end of the connecting groove 522 near the inner periphery of the arc-shaped portion 521 and the center of the forming groove 21 is smaller. The drive arm 523 is a long, rod-shaped structure. The first end of the drive arm 523 is integrally connected to the outer peripheral sidewall of the arc-shaped part 521, and the second end is connected to the second drive mechanism 51. The two arc-shaped parts 521 are arranged at intervals along the axial direction of the forming groove 21, respectively located at both ends of the multiple petioles 2, to ensure that the two ends of the petioles 2 can be moved synchronously and to prevent the petioles 2 from tilting.

[0098] In some exemplary embodiments, the second drive mechanism 51 includes a cylinder 511, a piston 512, a connecting rod 513, and a mounting base 514. The cylinder 511 is fixedly mounted on the side of the base 1 via the mounting base 514. The cylinder 511 can be a pneumatic cylinder or a hydraulic cylinder. The piston 512 is slidably mounted inside the cylinder 511, with one end extending out of the cylinder 511 and connected to the middle of the connecting rod 513. The connecting rod 513 is arranged parallel to the axial direction of the forming groove 21, and both ends of the connecting rod 513 are rotatably connected to the second ends of the drive arms 523 of the two wrenches 52, respectively. When the cylinder 511 drives the piston 512 to extend or retract, the piston 512 drives the connecting rod 513 to move in a direction perpendicular to the axial direction of the forming groove 21. The connecting rod 513 then drives the two drive arms 523 to swing synchronously, and the swinging of the drive arms 523 in turn drives the two arc-shaped portions 521 to rotate synchronously around the central axis of the forming groove 21.

[0099] In some exemplary embodiments, when the arcuate portion 521 rotates in one direction, the groove wall of the connecting groove 522 applies a radially inward force to the end of the protrusion 23 of the petal 2, pushing the petal 2 towards the central axis of the forming groove 21, thereby reducing the inner diameter of the forming groove 21. When the arcuate portion 521 rotates in the opposite direction, the groove wall of the connecting groove 522 applies a radially outward force to the end of the protrusion 23 of the petal 2, pulling the petal 2 away from the central axis of the forming groove 21, thereby increasing the inner diameter of the forming groove 21. By controlling the extension length of the piston 512, the rotation angle of the arcuate portion 521 can be precisely controlled, thereby precisely controlling the size of the inner diameter of the forming groove 21 to match the outer diameter of the tobacco rod to be produced.

[0100] According to the above embodiments of this application, by employing a drive assembly 5 structure consisting of a second drive mechanism 51 and two wrenches 52, the synchronous radial movement of multiple petal bodies 2 and the precise adjustment of the inner diameter of the forming groove 21 are achieved. By using a single second drive mechanism 51 to simultaneously drive two wrenches 52 to rotate synchronously, it is possible to ensure that the movement of all petal bodies 2 is consistent, thus maintaining good roundness and coaxiality of the forming groove 21 during adjustment.

[0101] In some exemplary embodiments, reference is made to Figure 11 As shown, the tobacco rod forming device also includes two opposing support frames 6, each support frame 6 mounted on the base 1 and located at both ends of the protrusions 23 of multiple leaflets 2. Each support frame 6 is provided with multiple radially extending second limiting grooves 61, the number of which is equal to the number of leaflets 2, corresponding one-to-one for the two ends of the protrusions 23 of the leaflets 2 to pass through. The second limiting groove 61 is an elongated through hole extending radially along the forming groove 21, the width of which is adapted to the width of the protrusion 23, and can constrain and guide the movement direction of the protrusion 23.

[0102] In some exemplary embodiments, reference is made to Figure 16 As shown, the wrench 52 also includes a drive arm 523 integrally connected to the outer peripheral sidewall of the arcuate portion 521, such as... Figure 17 As shown, the support frame 6 includes a first plate 62 and a second plate 63. Both the first plate 62 and the second plate 63 are arranged parallel to each other, perpendicular to the axial direction of the forming groove 21. (Refer to...) Figure 18 As shown, the top and bottom of the support frame 6 extend toward the arcuate portion 521 to form a second protrusion 622. The two second protrusions 622 are located on the side of the support frame 6 near the drive arm 523 so that the drive arm 523 passes through the two second protrusions 622 and extends to the outside of the support frame 6, so that the two second protrusions 622 can block and limit the swing stroke of the drive arm 523.

[0103] In some exemplary embodiments, reference is made to Figure 20 As shown, the support frame 6 also includes multiple connecting rods 64, which extend along the axial direction of the forming groove 21. Each connecting rod 64 has its two ends connected to two opposing first plates 62, thereby enhancing the overall strength and rigidity of the support frame 6. (Refer to...) Figure 21 As shown, the connecting block 65 is used to connect the first plate 62 and the second plate 63. The second limiting groove 61 is formed on the first plate 62, extending radially outward from the edge of the central through hole of the first plate 62 to the middle position of the first plate 62.

[0104] like Figures 18 to 21 As shown, the tobacco rod forming device also includes multiple elastic components 53, which are respectively disposed on the first plate 62 of the support frame 6 and correspond to each petal 2. The elastic components 53 are used to apply a radially outward elastic force to the petal 2, so that the connector 24 of the petal 2 abuts against the inner wall of the connecting groove 522 of the wrench 52, eliminating the gap between the connector 24 and the connecting groove 522, preventing the petal 2 from shaking or being impacted during movement, and improving the stability and accuracy of the inner diameter adjustment of the forming groove 21.

[0105] In some exemplary embodiments, a second limiting groove 61 is formed in the support frame 6 and communicates with the central through hole of the support frame 6. The main body portion 22 of the plurality of petal bodies 2 passes through the support frame 6 and the central through hole of the arcuate portion 521. A plurality of first protrusions 621 are formed protruding from the side of the support frame 6 away from the arcuate portion 521. The number of first protrusions 621 is the same as the number of petal bodies 2. Each first protrusion 621 extends to face the outer side of the end of the protrusion 23 of a corresponding petal body 2 so that the elastic component 53 can be elastically connected to the first protrusion 621 and abut against the end of the protrusion 23.

[0106] In some exemplary embodiments, each elastic component 53 includes a bolt 531, a second nut 532, and a spring 533. The bolt 531 extends perpendicularly to the protrusion 23, passes through the first protrusion 621, and engages with a fourth mounting hole 534 provided on the outer side of the protrusion 23 away from the molding groove 21. The second nut 532 is threadedly engaged with the bolt 531 on the outer side of the first protrusion 621 away from the protrusion 23. The spring 533 is sleeved on the bolt 531 and located between the first protrusion 621 and the second nut 532. By rotating the second nut 532 to move it away from or towards the center of the molding groove 21, the compression of the spring 533 can be adjusted, thereby adjusting the magnitude of the elastic force applied by the elastic component 53 to the flap 2 to adapt to different working conditions and requirements.

[0107] According to the above embodiments of this application, by setting the elastic component 53, the transmission gap between the valve body 2 and the wrench 52 can be effectively eliminated, improving the accuracy and stability of the inner diameter adjustment of the forming groove 21. When the wrench 52 rotates and drives the valve body 2 to move inward, the valve body 2 needs to overcome the elastic force of the elastic component 53, which makes the movement of the valve body 2 more stable and slow, avoiding impact and vibration caused by excessive movement speed; when the wrench 52 rotates and drives the valve body 2 to move outward, the elastic force of the elastic component 53 will push the valve body 2 to move synchronously with the wrench 52, ensuring that the valve body 2 will not lag behind the movement of the wrench 52 due to inertia or friction, thereby improving the response speed and accuracy of the inner diameter adjustment of the forming groove 21.

[0108] like Figures 22 to 25 As shown, the two ends of the protrusion 23 of the valve body 2 pass through the second limiting groove 61 on the first plate 62. Each valve body 2 also includes two connectors 24 installed at both ends of the protrusion 23. One end of the connector 24 is fixedly connected to the end of the protrusion 23, and the other end extends into the connecting groove 522 on the arc-shaped part 521 of the wrench 52. When the arc-shaped part 521 rotates, the groove wall of the connecting groove 522 drives the connector 24 to move, and the connector 24 in turn drives the protrusion 23 to slide along the second limiting groove 61, so that the main body 22 moves away from or toward the center of the forming groove 21, thereby adjusting the inner diameter of the forming groove 21. The side wall of the second limiting groove 61 constrains the movement direction of the protrusion 23, ensuring that the protrusion 23 can only move in the radial direction of the forming groove 21, and cannot circumferentially wobble or tilt, thereby ensuring the adjustment accuracy and stability of the forming groove 21.

[0109] In some exemplary embodiments, the connector 24 can extend into the corresponding connector groove 522 so that when the arcuate portion 521 rotates, the connector groove 522 drives the connector 24 to move, and the connector 24 drives the protrusion 23 and the main body portion 22 to move synchronously. During this process, the extension direction of the second limiting groove 61 is consistent with the radial direction of the forming groove 21, and the opening width of the second limiting groove 61 is consistent with the width of both ends of the protrusion 23 so that the groove wall of the second limiting groove 61 blocks the protrusion 23 from moving circumferentially along the forming groove 21, so that the protrusion 23 slides in the extension direction of the second limiting groove 61. Therefore, when the arcuate portion 521 rotates, each petal 2 is driven to move radially inward or outward toward the forming groove 21, thereby expanding or shrinking the inner diameter of the forming groove 21.

[0110] In some exemplary embodiments, the connector 24 includes a head 241 and a screw portion (not shown). The head 241 is a cylindrical structure with a diameter adapted to the width of the connecting groove 522 of the wrench 52, allowing it to roll or slide within the connecting groove 522. The screw portion extends axially from one end of the head 241 and has external threads. The two ends of the protrusion 23 of the flap 2 are respectively provided with a second mounting hole 243 and a third mounting hole 244, which are coaxially connected. The diameter of the second mounting hole 243 is larger than the diameter of the third mounting hole 244, forming a stepped hole. The screw portion of the connector 24 passes through the third mounting hole 244 and extends into the second mounting hole 243. The first nut 242 enters the interior of the third mounting hole 244 and is threadedly connected to the screw portion, fixing the connector 24 to the end of the protrusion 23.

[0111] The installation structure of this connector 24 is simple and reliable, and it is easy to install and disassemble. When the connector 24 wears out due to long-term use, it can be easily replaced without replacing the entire valve body 2, thus reducing the maintenance cost of the equipment. At the same time, the cylindrical head 241 can roll within the connecting groove 522, converting sliding friction into rolling friction, reducing friction and wear, and improving transmission efficiency and service life.

[0112] Figure 26 A perspective view of the mounting flap according to an embodiment of this application is shown schematically. Figure 27 A perspective view of the covering body according to an embodiment of this application is shown schematically. Figure 28 The illustration schematically shows a perspective view of a combination of a first upper valve, a second upper valve, a supporting valve, and two covering mechanisms according to an embodiment of this application. Figure 29 Schematic illustration Figure 28 A three-dimensional schematic diagram of the supporting valve from another perspective. Figure 30 The illustration shows the removal Figure 14 A three-dimensional schematic diagram from another perspective after the main body is covered. Figure 31 Schematic illustration Figure 30 The holding mechanism shown is illustrated from another perspective in a three-dimensional diagram.

[0113] like Figures 26-31 As shown, the ends of the main body portions 22 of the first upper petal 26 and the second upper petal 27 adjacent to the input end are located downstream of the input end in the conveying direction of the paper tape 101. The covering device 3 includes two covering mechanisms 31. One covering mechanism 31 is formed at the end of the main body portion 22 of the second upper petal 27 adjacent to the input end. A plurality of main petal bodies 25 include mounting petal bodies 251 adjacent to the first upper petal body 26. The other covering mechanism 31 is mounted on the main body portion 22 of the mounting petal body 251 and includes a covering body 32 located at the input end.

[0114] According to an embodiment of this application, the coating device 3 further includes a gluing mechanism 30. The coating body 32 is provided with a radially penetrating notch 321 so that the gluing mechanism 30 can apply glue through the notch 321 when the coating body 32 coats one side of the paper tape 101 onto the base rod 102. The plurality of main flaps 25 also include a support flap 252 adjacent to the second upper flap 27. The portion of the side wall of the main body 22 of the support flap 252 located at the input end extends upward in a vertical plane and forms a support portion 253 facing the notch 321. The support portion 253 is adapted to prevent the portion of the paper tape 101 extending radially outward from the lower part of the forming groove 21 on the other side from applying glue when the gluing mechanism 30 applies glue.

[0115] In some exemplary embodiments, such as Figure 26 and Figure 27 As shown, the portion of the main body 22 of the mounting body 251 near the side wall of the first upper valve 26 at the input end extends circumferentially toward the first upper valve 26 along the forming groove 21 to form a mounting portion 254. The mounting portion 254 has multiple first mounting holes 255 for fixing the covering mechanism 31 to the mounting portion 254 using bolts 531. The covering body 32 has through holes corresponding to the first mounting holes 255. Bolts 531 pass through the through holes and the first mounting holes 255 to fix the covering body 32 to the mounting portion 254. The inner surface of the covering body 32 is arc-shaped, and the end facing the output end moves axially away from the output end towards the central axis of the forming groove 21. A notch 321 radially penetrates the covering body 32 and is located at the center of the covering body 32.

[0116] like Figure 28 As shown, the ends of the main body portions 22 of the first upper petal 26 and the second upper petal 27 adjacent to the input end are located downstream of the input end in the conveying direction of the paper tape 101. That is, the length of the main body portions 22 of the first upper petal 26 and the second upper petal 27 is shorter than the length of the main body portion 22 of the main petal 25, and their input end ends are closer to the discharge end of the forming groove 21 than the input end end of the main petal 25, which facilitates the installation of the coating device 3.

[0117] In some exemplary embodiments, the covering device 3 includes two covering mechanisms 31 and an adhesive applicator 30. One covering mechanism 31 is formed at the end of the main body portion 22 of the second upper valve body 27 adjacent to the input end and is integrally formed with the second upper valve body 27. The other covering mechanism 31 is mounted on the main body portion 22 of the mounting valve body 251 and includes a covering body 32 located at the input end. The mounting valve body 251 is the main valve body 25 adjacent to the first upper valve body 26 among a plurality of main valve bodies 25, and the end of its main body portion 22 adjacent to the input end extends upward to form a mounting portion 254. The covering mechanism 31 is mounted on the mounting portion 254 by fasteners such as bolts 531.

[0118] In some exemplary embodiments, the inner walls of the two covering mechanisms 31 facing the forming groove 21 are formed as arcuate walls matching the outer diameter of the base rod 102. The ends of the two covering mechanisms 31 facing the output end move axially away from the output end towards the central axis of the forming groove 21, so as to sequentially guide the first and second sides of the paper tape 101 output from the output end to gradually cover the base rod 102. When the base rod 102 and the paper tape 101 enter from the input end of the forming groove 21, the two sides of the paper tape 101 contact the arcuate walls of the two covering mechanisms 31 respectively. Under the guidance of the arcuate walls, the two sides of the paper tape 101 gradually bend and cover the outer surface of the base rod 102. The covering body 32 is provided with a radially penetrating notch 321, and the shape of the notch 321 is approximately rectangular. Specifically, the covering body 32 located on the mounting petal 251 first covers the first side of the paper strip 101 onto the upper surface of the base rod 102. While the covering body 32 is covering the first side of the paper strip 101 onto the base rod 102, the adhesive application mechanism 30 can spray adhesive through the notch 321 onto the outer surface of the first side and / or the inner surface of the second side of the paper strip 101. The covering mechanism 31 located on the second upper petal 27 then covers the second side of the paper strip 101 onto the outer surface of the first side, and then the covering process of the paper strip 101 is completed.

[0119] In some exemplary embodiments, such as Figure 28 and Figure 29 As shown, the side wall of the main body 22 of the support petal 252, located at the input end, extends upward in a vertical plane to form a support portion 253. The inner surface of the support portion 253 is a vertical plane, opposite to the notch 321 on the covering body 32. When the glue application mechanism 30 applies glue to the paper tape 101 through the notch 321, the inner surface of the support portion 253 abuts against the outer surface of the paper tape 101 on the other side, preventing the paper tape 101 from moving radially outward, thereby improving the glue application quality and bonding effect.

[0120] According to the above embodiments of this application, by setting the coating device 3 at the input end of the forming groove 21 and making the coating mechanism 31 move synchronously with the petal body 2, it is ensured that the coating mechanism 31 can accurately coat the paper strip 101 onto the base rods 102 of different diameters. When the inner diameter of the forming groove 21 changes, the coating mechanism 31 will move radially synchronously with the petal body 2, and the distance between it and the central axis of the base rod 102 will also change accordingly, thereby maintaining a suitable coating distance and angle with the base rods 102 of different diameters, ensuring that the coating of the paper strip 101 is flat and the tension is uniform. At the same time, by setting a notch 321 on the coating body 32 for the glue coating mechanism 30 to pass through, and setting a support part 253 on the opposite side, the synchronous and precise cooperation of glue coating and coating is realized, avoiding the problems of glue position deviation and uneven glue coating, improving the bonding quality of the paper strip 101 and the forming effect of the tobacco rod.

[0121] like Figure 28 As shown, the covering body 32 is axially aligned with the main body 22 of the first upper petal 26. The thickness of each covering mechanism 31 in the circumferential direction of the forming groove 21 is greater than the thickness of the main body downstream of the corresponding covering mechanism 31 in the conveying direction of the paper tape 101. The covering device 3 also includes a holding mechanism 33, which is located downstream of the covering body 32 in the conveying direction of the paper tape 101. A recessed portion is formed at the position of the covering body 32 opposite to the covering mechanism 31 on the second upper petal 27. The recessed portion is provided with a through hole corresponding to the first mounting hole 255 so that the holding mechanism 33 can be bolted on. Figure 30 As shown, the retaining mechanism 33 is opposite to the covering mechanism 31 on the second upper valve body 27, and one side of the retaining mechanism 33 is flush with the side wall of the first upper valve body 26 facing the open space 211. Figure 31 As shown, the retaining mechanism 33 includes a mounting body 331 and an enclosure portion 332. The mounting body 331 is mounted on the covering body 32 by bolts 531, wherein the bolts 531 pass sequentially through corresponding through holes on the covering body 32 and the first mounting hole 255 on the mounting flap 251. The enclosure portion 332 extends radially inward from one side of the mounting body 331, and the lower surface of the enclosure portion 332 is an arcuate surface. The retaining mechanism 33 is used to continue applying pressure to the first side of the paper tape 101 after the adhesive is applied, so that the outer side of the second side is pressed against the arcuate wall of the covering mechanism 31 to cover and adhere the second side to the outer side of the first side.

[0122] The embodiments of this application have been described above. However, these embodiments are merely illustrative and not intended to limit the scope of this application. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of this application is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this application, and all such substitutions and modifications should fall within the scope of this application.

Claims

1. A tobacco rod forming device, characterized in that, include: Base (1); Multiple valves (2), each valve (2) is movably mounted on the base (1), the multiple valves (2) are parallel and form a forming groove (21) that matches the outer diameter of the tobacco rod. The transmission device (100) is configured to drive the paper tape (101) and the base rod (102) placed on the paper tape (101) from the input end of the forming groove (21) into the forming groove (21). The wrapping device (3), located at the input end, is configured to wrap both sides of the paper tape (101) onto the base rod (102) and spray adhesive between the two sides of the paper tape (101) to form a preliminary rod (110). The heating mechanism (4) is configured to move movably through the two adjacent petals (2) in the radial direction of the forming groove (21) to heat the adhesive, so that the preliminary rod (110) forms a tobacco rod.

2. The tobacco rod forming apparatus according to claim 1, characterized in that, It also includes a drive assembly (5) configured to drive the petal (2) to move radially along the forming groove (21) such that the inner diameter of the forming groove (21) matches the outer diameter of the tobacco rod.

3. The tobacco rod forming apparatus according to claim 2, characterized in that, Each of the valve bodies (2) includes a main body (22) and a protrusion (23), the plurality of main bodies (22) forming the molding groove (21), and the protrusion (23) extending radially outward from the outer side of the main body (22) opposite to the molding groove (21); Multiple valves (2) include: Multiple main lobe bodies (25) form the lower portion of the forming groove (21), and one end of the main body portion (22) of the multiple main lobe bodies (25) is aligned to form the input end; and The first upper valve (26) and the second upper valve (27) are located above the two upper edges of the lower part of the forming groove (21), respectively. The first upper valve (26) and the second upper valve (27) serve as two adjacent valves (2) and form an open space (211) for the heating mechanism (4) to enter.

4. The tobacco rod forming apparatus according to claim 3, characterized in that, The heating mechanism (4) includes: The heating part (41) extends axially parallel to the forming groove (21); A first drive mechanism (43) is mounted on the base (1); and The controller is configured to control the first drive mechanism (43) to drive the heating part (41) through the open space (211) to move vertically to contact the preliminary rod (110), control the heating part (41) to heat the preliminary rod (110) to form the tobacco rod, and then control the first drive mechanism (43) to drive the heating part (41) to detach from the tobacco rod.

5. The tobacco rod forming apparatus according to claim 4, characterized in that, The heating element (41) includes: The heating body (411) extends axially parallel to the forming groove (21); Heating element (412) is disposed inside the heating body (411); A temperature sensor (413) is disposed inside the heating body (411) and configured to detect the temperature inside the heating body (411). The controller is further configured to adjust the heating power of the heating tube (412) according to the temperature detected by the temperature sensor (413).

6. The tobacco rod forming apparatus according to claim 3, characterized in that, The inner edge of the main body (22) of each of the first upper valve body (26) and the second upper valve body (27) is provided with a first limiting groove (28) spaced apart in the axial direction of the forming groove (21). The two valve bodies (2) of the main valve body (25) adjacent to the first upper valve body (26) and the second upper valve body (27) are respectively provided with limiting protrusions (29) that cooperate with the first limiting groove (28).

7. The tobacco rod forming apparatus according to claim 3, characterized in that, The drive assembly (5) includes a second drive mechanism (51) and two wrenches (52). Each wrench (52) includes an arc-shaped portion (521) with multiple connecting grooves (522). The two arc-shaped portions (521) are arranged axially spaced in the forming groove (21). The two ends of the protrusion (23) are slidably inserted into the connecting groove (522). The connecting groove (522) extends in the circumferential direction of the arc-shaped portion (521), and the distance between the two ends of the connecting groove (522) and the center of the forming groove (21) is different. The second drive mechanism (51) is configured to drive the two arc-shaped portions (521) to rotate synchronously so that the connecting groove (522) drives the protrusion (23) and the main body (22) to move.

8. The tobacco rod forming apparatus according to claim 7, characterized in that, It also includes two opposing support frames (6), each of which is mounted on the base (1), and each of which is provided with a plurality of radially extending second limiting grooves (61). The two ends of the protrusion (23) pass through the second limiting groove (61). Each of the petals (2) also includes two connectors (24) installed at both ends of the protrusion (23). The connectors (24) extend into the connecting groove (522), so that the second limiting groove (61) guides the protrusion (23) to move in the radial direction and drives the main body (22) to move away from or toward the center of the forming groove (21) to adjust the inner diameter of the forming groove (21).

9. The tobacco rod forming apparatus according to claim 3, characterized in that, The ends of the main body portions (22) of the first upper petal (26) and the second upper petal (27) adjacent to the input end are located downstream of the input end in the conveying direction of the paper tape (101); The covering device (3) includes two covering mechanisms (31), one of which is formed at the end of the main body (22) of the second upper valve (27) adjacent to the input end, and the plurality of main valves (25) include mounting valves (251) adjacent to the first upper valve (26), and the other covering mechanism (31) is mounted on the main body (22) of the mounting valve (251) and includes a covering body (32) located at the input end.

10. The tobacco rod forming apparatus according to claim 9, characterized in that, The covering device (3) further includes a glue application mechanism (30), and the covering body (32) is provided with a radially penetrating notch (321) so that the glue application mechanism (30) can apply glue through the notch (321) when the covering body (32) covers one side of the paper strip (101) onto the base rod (102); The plurality of main valve bodies (25) also include a support valve body (252) adjacent to the second upper valve body (27), wherein the portion of the side wall of the main body (22) of the support valve body (252) located at the input end extends upward in a vertical plane and forms a support portion (253) facing the notch (321), the support portion (253) being adapted to prevent the portion of the paper tape (101) extending from the lower part of the forming groove (21) on the other side from moving radially outward when the glue coating mechanism (30) applies glue.

Images