A filter rod outer surface groove extrusion forming mechanism

Abstract

The patent provides a filter rod outer surface groove extrusion forming mechanism, comprising: a conveying module for conveying a paper tape along a predetermined path; a heating module arranged downstream of the conveying module for heating the paper tape; a forming module arranged downstream of the heating module for extrusion forming of the heated and softened paper tape, wherein the forming module comprises: a first forming wheel, the outer peripheral surface of which is provided with continuous grooves in the circumferential direction, and the grooves are linearly arranged along the axial direction; a second forming wheel, the outer peripheral surface of which is spaced apart and distributed with forming sections and blank sections in the circumferential direction; the first forming wheel and the second forming wheel are placed horizontally side by side, forming a gap for the paper tape to pass between them, and are respectively connected with a driving mechanism, the rotating speed of which can be independently controlled, so as to realize efficient processing of composite grooves, efficiently and accurately complete the groove processing of the filter rod paper tape, meet the various functional requirements in the production of filter rods, and at the same time ensure the processing quality and production efficiency.

Description

Technical Field

[0001] This patent relates to the field of new tobacco production equipment, specifically to a groove extrusion molding mechanism for the outer surface of a filter rod. Background Technology

[0002] In the filter rod production process, groove processing is a crucial step in realizing the multiple functions of the filter rod. Traditional filter rod groove processing equipment typically uses a single type of pressure roller, such as a continuous corrugated pressure roller or an intermittently convex pressure roller, to form grooves on the surface of the filter rod material. These pressure rollers can meet basic processing requirements, but in the production process, it is often necessary to perform composite processing of continuous linear grooves and periodically intermittent grooves at the same station to meet the multiple functional requirements of filter rod forming, such as flow guidance and enhanced friction. However, existing equipment has many limitations in performing such composite processing.

[0003] Furthermore, the materials used in filter rods (especially cellulose acetate paper) are quite rigid at room temperature, and directly pressing grooves can easily lead to problems such as burrs at the edges, material breakage, or uneven groove depth. Although some equipment is equipped with heating devices, there is a problem of uneven heating, which causes the material to soften excessively in the middle due to the large contact area, while the edges are not heated enough to form wrinkles during pressing. This uneven temperature distribution directly affects the quality of groove forming, resulting in defects such as fluctuations in the circumferential accuracy of the filter rod and abnormal distribution of vent holes. In severe cases, it can cause unstable filtration performance of the filter rod.

[0004] Furthermore, when the filter rod material enters the groove processing station, the traditional straight-line guide path makes it difficult to accurately control the tension and position of the material. Axial parallelism deviations between the guide rollers and the pressure roller assembly, as well as lateral offsets during material movement, can cause the groove position to deviate from the design trajectory, resulting in circumferential misalignment or axial discontinuity of the grooves on the filter rod surface. For example, when processing highly elastic polypropylene fiber materials, even minor vibrations in the guide mechanism can trigger tensile deformation of the material, causing inconsistencies in groove depth and spacing, ultimately affecting the physical strength and appearance quality of the filter rod. Utility Model Content

[0005] The purpose of this invention is to provide a groove extrusion molding mechanism for the outer surface of a filter rod. Its structure is simple. Through the design of the heating module and the molding module, it can achieve efficient and precise processing of a composite structure of continuous linear grooves and periodically spaced grooves on the same station. At the same time, it solves the problems of low production efficiency, processing accuracy deviation, uneven material heating and molding quality during high-speed production that exist in the prior art, and significantly improves the processing quality and production efficiency of the filter rod.

[0006] This patent provides the following technical solution:

[0007] A filter rod outer surface groove extrusion molding mechanism includes: a conveying module for conveying a paper strip along a predetermined path; a heating module disposed downstream of the conveying module for heating the paper strip; and a molding module disposed downstream of the heating module for extruding and molding the heated and softened paper strip. The molding module includes: a first molding wheel with continuous grooves along its outer circumferential direction on its outer surface, the grooves being linearly arranged along the axial direction; and a second molding wheel with molding sections and blank sections spaced apart along its outer circumferential direction on its outer surface. The first and second molding wheels are placed horizontally side-by-side, forming a gap between them for the paper strip to pass through, and are respectively connected to a drive mechanism, allowing independent control of their rotational speed.

[0008] Furthermore, the conveying module includes a paper guide roller.

[0009] Furthermore, the paper guide roller is made of metal.

[0010] Furthermore, the surface treatment is an anti-slip structure.

[0011] Furthermore, it is used to feed paper tape at a constant speed and tension.

[0012] Furthermore, the heating module includes a guide plate.

[0013] Furthermore, the guide plate has an arc-shaped surface and a built-in heating component.

[0014] Furthermore, the surface of the guide plate is coated with a coating with a low coefficient of friction.

[0015] Furthermore, the first forming wheel and the second forming wheel are detachably connected.

[0016] Furthermore, both the first forming wheel and the second forming wheel are made of cemented carbide material.

[0017] Furthermore, the heating assembly includes multiple sets of independently temperature-controlled heating elements.

[0018] Furthermore, it also includes tension detection sensors and position detection sensors to monitor the running tension and position information of the paper tape in real time.

[0019] This patent has the following beneficial effects:

[0020] First, this mechanism, through the coordinated design of the first and second forming wheels, enables the simultaneous processing of continuous linear grooves and periodically spaced grooves at the same workstation. This design effectively avoids the downtime and changeover time losses caused by the frequent mold changes required by traditional equipment to achieve different groove shapes, significantly improving production efficiency. Simultaneously, the composite processing of the two groove structures can meet multiple functional requirements of the filter rod, such as air conduction, friction enhancement, and positioning. For example, continuous linear grooves optimize the airflow uniformity of the filter rod, while spaced grooves enhance the bonding force between filter rod materials, providing technical support for improving the overall performance of the filter rod. Second, the guide plate of this mechanism adopts an arc-shaped design with a convex center, combined with multiple built-in independently temperature-controlled heating elements, ensuring uniform heating of the paper strip in the center and at the edges as it passes through, effectively controlling temperature deviation. This innovative design solves the problem of excessive softening in the center and insufficient heating at the edges caused by the difference in contact area in traditional flat heating plates, ensuring that the paper strip reaches a consistent softening state when entering the groove extrusion process. In actual production, this system significantly reduces defects such as burrs at the groove edges and material breakage, effectively improving the groove forming qualification rate and thus ensuring the stability of the filter rod's circumferential accuracy and appearance quality. Furthermore, this mechanism can adapt to high-speed production, balancing quality and efficiency. In high-speed production scenarios, the heating system, with its rapid heating and precise temperature control, can quickly bring the paper tape to the appropriate softening temperature, avoiding production speed limitations caused by insufficient heating efficiency. Simultaneously, the efficient extrusion molding design of the first and second forming rollers, combined with a stable conveyor module, maintains high-quality groove processing even at high speeds, effectively solving problems such as material carbonization and poor groove forming that easily occur in traditional equipment during high-speed production. This achieves a dual improvement in filter rod groove processing quality and production efficiency. Finally, this device is also equipped with tension and position sensors to monitor the paper tape's running tension and position in real time. When an abnormality is detected, it is automatically fed back to the control system. The control system adjusts parameters such as the guide roller's speed and the forming module's pressure to ensure the stability and accuracy of the processing, guaranteeing the continuity and consistency of filter rod production. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this patent, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this patent and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic side view of the assembly of the groove extrusion molding mechanism for the outer surface of the filter rod in this patent.

[0023] Figure 2This is a three-dimensional schematic diagram of the molding module in this patent;

[0024] Figure 3 This is a schematic diagram of a partial enlarged view A of the molding module in this patent;

[0025] Figure 4 This is a schematic diagram of a partially enlarged view (B) of the molding module in this patent.

[0026] The reference numerals in the attached figures are explained as follows:

[0027] Paper tape: 100

[0028] Paper guide roller: 300

[0029] First forming wheel: 400

[0030] Second forming wheel: 500

[0031] Guide paper: 600

[0032] Molding section: 510

[0033] Blank segment: 520

[0034] Continuous trench: 410 Detailed Implementation

[0035] The detailed features and advantages of this application are described below in the specific embodiments. The content of this description is sufficient to enable any person skilled in the art to understand the technical content of this application and implement it accordingly. Based on the specification, claims and drawings disclosed in this specification, a person skilled in the art can easily understand the related objectives and advantages of this application.

[0036] The present invention will now be described with reference to the accompanying drawings, in which similar reference numerals denote similar elements. While specific structures and arrangements are discussed, it should be understood that this is done merely for illustrative purposes. Those skilled in the art will recognize that other structures and arrangements can be used without departing from the spirit and scope of the present invention. It will be apparent to those skilled in the art that the present invention can also be used in a variety of other applications.

[0037] In this specification and claims, several terms will be used, and unless otherwise indicated, these terms will be defined to have the following meanings:

[0038] The singular forms “a” and “the” include their corresponding plural forms. “At least one” means one or more, and “more” means two or more. “At least one of the following” or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can be expressed as: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0039] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural. Additionally, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects, but it can also represent an "and / or" relationship. Please refer to the context for a more accurate understanding.

[0040] In the description of this embodiment, it should be noted that the terms "upper," "lower," "inner," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "upstream" and "downstream" mentioned in the specification are defined according to the material transfer sequence in the production process, used to describe the relative positional relationship of each module in the processing sequence (e.g., the output of the "upstream" module is the input of the "downstream" module), and do not specifically refer to their absolute spatial orientation. The scope of protection of this utility model is defined by the appended claims and is not limited by the absolute spatial meaning of the aforementioned directional terms.

[0041] Unless otherwise indicated, the following abbreviations have the following meanings, and any other abbreviations used herein but not defined have their generally accepted standard meanings:

[0042] All other terms used herein for special definition are intended to have the general meaning understood by one of ordinary skill in the art, and in particular, meaning that one of ordinary skill in the art, upon reading the claims, specification and drawings of this patent, can directly and without doubt determine how the technical solution of this patent can be implemented.

[0043] Even if there are incomplete descriptions, omissions, or ambiguities in the grammar, words, punctuation, graphics, symbols, etc. of the claims, specification, and drawings of this patent, a person skilled in the art can still arrive at the only correct understanding by reading the claims, specification, and drawings as a whole without extensive reasoning or experimentation, and effectively exclude various incorrect interpretations that are not aimed at achieving the purpose of this patent.

[0044] Those skilled in the art would first choose to read the claims, specification, and drawings of this patent to reasonably interpret the terms; secondly, they would choose to refer to the relevant definitions in other documents published by the applicant before the filing date to reasonably interpret the terms; thirdly, they would choose the references cited in this patent to reasonably interpret the terms; and finally, they would choose to combine the technical dictionaries, technical manuals, reference books, textbooks, national or industry technical standards, etc., commonly used by those skilled in the art to reasonably interpret the terms.

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0046] See Figure 1 This is a schematic diagram of the groove extrusion molding mechanism for the outer surface of the filter rod. The device consists of a conveying module, a heating module, and a molding module arranged sequentially from bottom to top. The conveying module includes a guide roller 300, the heating module includes a guide plate 600, and the molding module includes a first molding wheel 400 and a second molding wheel 500 arranged in parallel.

[0047] The guide roller 300 is responsible for smoothly conveying the filter rod production paper strip 100 to the guide plate 600 at a constant speed and tension. The guide roller 300 is made of high-strength and wear-resistant metal, ensuring its durability and stability during long-term use. Its surface is specially treated for slip resistance. The axial position of the guide roller 300 can be finely adjusted via an adjustment mechanism, ensuring axial parallelism between the guide roller 300 and subsequent components (such as the first forming roller 400 and the second forming roller 500). By precisely adjusting the axial position of the guide roller 300, problems such as uneven paper strip 100 conveying or decreased processing accuracy caused by axial parallelism deviations between components can be effectively avoided, thus ensuring the processing quality and operating efficiency of the entire device.

[0048] The guide plate 600 has an arc-shaped structure with a central convex shape. This design ensures that the contact area and pressure between the paper strip 100 and the guide plate are consistent across the center and edges as the paper strip passes through it. Compared to traditional flat heating plates, this arc-shaped structure effectively solves the problem of excessive softening in the center and insufficient heating at the edges due to differences in contact area, thus achieving uniform heating of the paper strip 100. The heating assembly consists of multiple independently temperature-controlled heating elements, which can precisely adjust the heating temperature and time according to different materials and process requirements, ensuring the paper strip reaches a suitable softening state and providing a guarantee for subsequent groove forming. This ensures that the paper strip 100 reaches a consistent softening state when entering the groove extrusion process, significantly reducing defects such as burrs and material breakage at the groove edges, and improving the pass rate of groove forming. The surface of the guide plate 600 is coated with a low-friction coefficient coating. This coating reduces friction between the paper strip 100 and the guide plate, preventing damage to the paper strip during preheating. The low-friction coating not only extends the service life of the paper strip but also further improves the operating efficiency and stability of the entire device.

[0049] refer to Figures 2-4 The first forming wheel 400 and the second forming wheel 500 are horizontally arranged side-by-side above the guide plate 600, downstream of the guide plate throughout the process. A gap is formed between them for the paper strip 100 to pass through. The outer circumferential surface of the first forming wheel 400 has continuous grooves 410 distributed circumferentially. These grooves are uniformly and linearly distributed along the axis, creating continuous linear grooves after the paper strip 100 is extruded. The depth, width, and shape of the continuous grooves 410 can be customized according to the design requirements of the filter rod. For example, the continuous grooves 410 can be designed to be shallow and wide to form air channels for the filter rod; or they can be designed to be deep and narrow to enhance the structural strength of the filter rod. The surface of the second forming wheel 500 has forming sections 510 and blank sections 520 spaced circumferentially. The spacing, depth, and other parameters of these forming sections 510 can be adjusted according to actual needs. These are used to extrude spaced grooves onto the paper strip 100. Both forming wheels are detachably connected and interchangeable, allowing for adjustments based on different processing requirements. Differences in the left-right orientation and position of the first and second forming wheels result in variations in the tightness and depth of the paper tape grooves. Each forming wheel is connected to an independent drive motor, enabling precise speed control and synchronized operation to ensure the accuracy and quality of the groove processing. The first forming wheel 400 and the second forming wheel 500 are placed horizontally side-by-side, forming a gap between them for the paper tape 100 to pass through. Driven by the drive mechanism, the two forming wheels rotate independently, compressing the paper tape 100 through the groove structure on their respective surfaces, thus simultaneously completing the processing of continuous linear grooves and periodically spaced grooves at the same station. This collaborative working method not only improves production efficiency but also ensures the accuracy and quality of the groove processing.

[0050] During operation, the paper strip 100 is first conveyed by the guide roller 300 to the guide plate 600 for preheating and softening. It then enters the gap between the first forming roller 400 and the second forming roller 500, where, under the coordinated extrusion of the two forming rollers, both continuous linear grooves and periodically spaced grooves are simultaneously formed. The entire device is also equipped with tension and position sensors to monitor the running status of the paper strip 100 in real time and automatically feed this information back to the control system. By adjusting relevant parameters, the stability and accuracy of the processing are ensured. This structural layout and component design enable the device of this invention to significantly improve production efficiency and processing quality while meeting the multiple functional requirements of the filter rods.

[0051] Work process

[0052] In the filter rod outer surface groove extrusion molding mechanism of this utility model, the processing procedure is as follows:

[0053] Paper tape conveying: The paper tape 100 is smoothly conveyed to the guide plate 600 at a constant speed and tension by the guide roller 300. The guide roller 300 is made of metal with a surface treatment to prevent slippage, ensuring that the paper tape 100 can be stably conveyed to the next station. At the same time, the axial position of the guide roller 300 can be finely adjusted by the adjustment mechanism to ensure axial parallelism with subsequent components.

[0054] Preheating: After passing through the guide roller 300, the paper tape 100 enters the guide plate 600. The guide plate 600 has an arc-shaped structure with a central convex shape, and integrates multiple independently temperature-controlled heating elements. When the paper tape 100 passes through the guide plate 600, the heating components uniformly preheat the paper tape, bringing it to a suitable softening state. This arc-shaped structure design ensures uniform heating between the center and edges of the paper tape, effectively avoiding the problems of excessive softening in the center and insufficient heating at the edges caused by the difference in contact area in traditional flat heating plates.

[0055] Groove Forming: After preheating, the paper strip 100 passes through the guide plate 600 and enters the gap between the first forming wheel 400 and the second forming wheel 500 to begin extrusion forming. The outer circumferential surface of the first forming wheel 400 has continuous grooves 410 along the circumferential direction, and several continuous grooves 410 are linearly distributed along the axial direction, used to extrude continuous linear grooves on the paper strip 100. The outer circumferential surface of the second forming wheel 500 has forming sections 510 and blank sections 520 distributed at intervals along the circumferential direction. The forming sections contain groove structures, while the blank sections are smooth circumferences. The second forming wheel 500 is used to extrude spaced grooves on the paper strip 100. The first forming wheel 400 and the second forming wheel 500 are controlled by independent drive motors, enabling precise speed adjustment and synchronous operation. Driven by the drive mechanism, the first forming wheel 400 and the second forming wheel 500 rotate respectively, extruding the paper strip 100 through their respective surfaces, thereby simultaneously completing the processing of continuous linear grooves and periodically spaced grooves at the same station.

[0056] Real-time monitoring and adjustment: Throughout the processing, the tension and position sensors equipped with the device monitor the running tension and position of the paper tape 100 in real time. Once an abnormal tension is detected, the control system automatically adjusts parameters such as the rotation speed of the guide roller 300 and the pressure of the first forming roller 400 and the second forming roller 500. The position sensors constantly detect the edge position of the paper tape. If a deviation is detected, the control system immediately adjusts the axial position of the first forming roller 400 and the second forming roller 500 to ensure the stability and accuracy of the processing.

[0057] Subsequent processes: The processed paper tape 100 is smoothly conveyed to the filter rod forming machine for the subsequent filter rod rolling forming process, and finally a filter rod product with the required groove structure is formed.

[0058] Through the above working process, the groove extrusion molding mechanism for the outer surface of the filter rod of this utility model can efficiently and accurately complete the groove processing of the filter rod paper tape, meet the multiple functional requirements in filter rod production, and at the same time ensure processing quality and production efficiency.

[0059] Industrial applicability:

[0060] First, this mechanism, through the coordinated design of the first and second forming wheels, enables the simultaneous processing of continuous linear grooves and periodically spaced grooves at the same workstation. This design effectively avoids the downtime and changeover time losses caused by the frequent mold changes required by traditional equipment to achieve different groove shapes, significantly improving production efficiency. Simultaneously, the composite processing of the two groove structures can meet multiple functional requirements of the filter rod, such as air conduction, friction enhancement, and positioning. For example, continuous linear grooves optimize the airflow uniformity of the filter rod, while spaced grooves enhance the bonding force between filter rod materials, providing technical support for improving the overall performance of the filter rod. Second, the guide plate of this mechanism adopts an arc-shaped design with a convex center, combined with multiple built-in independently temperature-controlled heating elements, ensuring uniform heating of the paper strip in the center and at the edges as it passes through, effectively controlling temperature deviation. This innovative design solves the problem of excessive softening in the center and insufficient heating at the edges caused by the difference in contact area in traditional flat heating plates, ensuring that the paper strip reaches a consistent softening state when entering the groove extrusion process. In actual production, this device significantly reduces defects such as burrs at the groove edges and material breakage, effectively improving the groove forming qualification rate and thus ensuring the stability of the filter rod's circumferential accuracy and appearance quality. Furthermore, this mechanism can adapt to high-speed production, balancing quality and efficiency. In high-speed production scenarios, the heating module, with its rapid heating and precise temperature control, can quickly bring the paper tape to the appropriate softening temperature, avoiding production speed limitations caused by insufficient heating efficiency. Simultaneously, the efficient extrusion molding design of the first and second forming rollers, combined with a stable conveyor module, maintains high-quality groove processing even at high speeds, effectively solving problems such as material carbonization and poor groove forming that easily occur in traditional equipment during high-speed production. This achieves a dual improvement in filter rod groove processing quality and production efficiency. Finally, this device is also equipped with tension and position sensors to monitor the paper tape's running tension and position in real time. When an abnormality is detected, it is automatically fed back to the control system. The control system adjusts parameters such as the guide roller's speed and the forming module's pressure to ensure the stability and accuracy of the processing, guaranteeing the continuity and consistency of filter rod production.

[0061] In the several embodiments provided in this application, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed.

[0062] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0063] In this specification, references to "an embodiment" or "a specific implementation" mean that a particular feature, structure, or characteristic described in connection with that embodiment / specific implementation is included in at least one embodiment / specific implementation of the present invention.

[0064] Therefore, the phrase "in one embodiment / specification" appearing in various places in this specification does not necessarily refer to the same embodiment / setting, but rather to possible. Furthermore, specific features, structures, or characteristics may be combined in one or more embodiments / settings in any suitable manner, as may be understood by those skilled in the art from this disclosure.

[0065] Similarly, it should be understood that in the above description of exemplary embodiments / specific implementations of this utility model, various features of this utility model are sometimes combined in a single embodiment / specific implementation or its figures and description, with the aim of simplifying the disclosure and aiding in the understanding of one or more of the various utility aspects. However, except for expressly stated instructions to the contrary or obvious technical contradictions or exclusions, the method of description in this patent should not be construed as reflecting an intention that the claimed utility model claims more features than are expressly stated in each claim. Rather, the utility aspect reflected in the claims lies in not all features of a single foregoing disclosed embodiment / specific implementation. Therefore, the claims following the detailed description are expressly incorporated herein by reference, and each claim exists independently as a separate embodiment / specific implementation of this utility model.

[0066] Furthermore, while some embodiments / specific implementations described herein include, but are not limited to, other features included in other embodiments / specific implementations, combinations of features from different embodiments / specific implementations are intended to fall within the scope of this invention and form different embodiments / specific implementations, as will be understood by those skilled in the art. For example, in the following claims, any embodiment / specific implementation of any claim can be used in any combination.

[0067] The terms and expressions used in this specification are for illustrative purposes and not for limitation. The use of these terms and expressions is not intended to exclude any equivalents of the features or portions thereof shown and described, but rather to allow for various modifications that may be made within the scope of the claims of this invention.

[0068] Therefore, it should be understood that although the present invention has been specifically disclosed through preferred embodiments, exemplary embodiments and optional features, those skilled in the art may take variations or modifications of the concepts disclosed in this specification, and such variations and modifications are therefore considered to be within the scope of the present invention as defined by the appended claims.

[0069] The specific embodiments given in this specification are examples of useful implementations of this utility model. It will be obvious to those skilled in the art that this utility model can be implemented using many variations of the equipment, equipment components, and method steps disclosed in this specification.

[0070] The foregoing description of specific embodiments has fully disclosed the general features of this invention, enabling others to easily modify and / or adapt such embodiments for various applications by applying knowledge within the scope of the art, without excessive experimentation or deviation from the general concept of this invention. Therefore, based on the teachings and guidance provided herein, it is intended that such modifications and alterations be included within the meaning and scope of equivalents of the disclosed embodiments. It should be understood that the wording or terminology used herein is for descriptive purposes and not intended to be limiting; thus, the wording or terminology in this specification will be interpreted by those skilled in the art based on the foregoing teachings and guidance.

[0071] Furthermore, the scope of this invention should not be limited to any of the exemplary embodiments described above, but only to the appended claims and their equivalents.

Claims

1. A groove extrusion molding mechanism for the outer surface of a filter rod, characterized in that, include: The conveying module is used to convey paper tape along a predetermined path; A heating module, located downstream of the conveying module, is used to heat the paper tape; A forming module, disposed downstream of the heating module, is used to extrude and form the heated and softened paper tape, wherein the forming module includes: The first forming wheel has continuous grooves on its outer circumferential surface, and the grooves are arranged linearly along the axial direction. The second forming wheel has forming sections and blank sections distributed at intervals along the circumferential direction on its outer circumferential surface. The first forming wheel and the second forming wheel are placed horizontally side by side, forming a gap between them for the paper tape to pass through, and are respectively connected to the drive mechanism, so that the rotation speed can be controlled independently.

2. The filter rod outer surface groove extrusion molding mechanism according to claim 1, characterized in that, The conveying module includes a paper guide roller.

3. The filter rod outer surface groove extrusion molding mechanism according to claim 2, characterized in that, The paper guide roller is made of metal and has a non-slip surface treatment, used to convey the paper strip at a constant speed and tension.

4. The filter rod outer surface groove extrusion molding mechanism according to claim 1, characterized in that, The heating module includes a guide plate with an arc-shaped surface and a built-in heating component.

5. The filter rod outer surface groove extrusion molding mechanism according to claim 4, characterized in that, The surface of the guide plate is coated with a low coefficient of friction.

6. The filter rod outer surface groove extrusion molding mechanism according to claim 4, characterized in that, The first forming wheel and the second forming wheel are detachably connected.

7. The filter rod outer surface groove extrusion molding mechanism according to claim 6, characterized in that, Both the first forming wheel and the second forming wheel are made of cemented carbide material.

8. The filter rod outer surface groove extrusion molding mechanism according to claim 7, characterized in that, The heating assembly includes multiple sets of independently temperature-controlled heating elements.

9. The filter rod outer surface groove extrusion molding mechanism according to claim 1, characterized in that, It also includes tension detection sensors and position detection sensors to monitor the running tension and position information of the paper tape in real time.

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