A method of forming a composite filter rod and a composite filter rod forming apparatus

Abstract

The present application belongs to the technical field of tobacco processing, and discloses a composite filter rod forming method and a composite filter rod forming device. The composite filter rod forming method provided by the present application comprises the following steps: S1: performing slitting operation on raw material filter rods of at least two different materials to slit the raw material filter rods of different materials into multiple filter rod segments; S2: performing staggered arrangement on the multiple filter rod segments after slitting; S3: driving the multiple filter rod segments arranged in a staggered manner to move along a plane, and combining the filter rod segments of different materials in the axial direction of the filter rod segments during the movement to form a composite filter rod. The composite filter rod forming method provided by the present application realizes the combination of the filter rod segments during the movement of the filter rod segments along the plane, so that the filter rod segments are not affected by centrifugal force during the combination, the problem of rod dropping is avoided, the stability during the forming of the composite filter rod is improved, and the forming efficiency is also improved.

Description

Technical Field

[0001] This invention relates to the field of tobacco processing technology, and in particular to a method and apparatus for forming composite filter rods. Background Technology

[0002] In related technologies, composite filter rods are usually manufactured using a wheel-type composite molding method. Several drums are used to cut, assemble, and transport the filter rods in sequence. This causes the filter rods to move mostly in a circumferential direction during the molding process, making them susceptible to centrifugal force. Especially during the assembly of filter rods, the filter rods are prone to falling off under the action of centrifugal force, which greatly reduces the stability of the composite filter rod molding process and thus affects the molding efficiency of the composite filter rods.

[0003] Therefore, there is an urgent need for a composite filter rod forming method and a composite filter rod forming device to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a composite filter rod forming method and a composite filter rod forming device to avoid the problem of filter rod segments falling off due to centrifugal force during the assembly process, thereby improving the stability of the composite filter rod forming process and increasing the forming efficiency.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A method for forming a composite filter rod includes the following steps:

[0007] S1: Perform a cutting operation on at least two different types of raw material filter rods to cut the raw material filter rods of different materials into multiple filter rod segments;

[0008] S2: Arrange the multiple segments of the cut filter rod in a circumferentially staggered manner;

[0009] S3: Drive the multiple filter rod segments arranged in a staggered manner to move along the plane, and during the movement, combine the filter rod segments of different materials in the axial direction of the filter rod segments to form the composite filter rod.

[0010] As an alternative to the composite filter rod forming method, in step S3, the step of combining the filter rod segments of different materials along the axial direction of the filter rod segments during the movement includes the following steps:

[0011] S31: Along the moving direction of the filter rod segment, filter rod segments of different materials are received in sequence, and the position of the received filter rod segment along the axial direction of the filter rod segment is adjusted so that the latest received filter rod segment is inserted into the position to be assembled.

[0012] As an optional embodiment of the composite filter rod forming method, the step of combining the filter rod segments of different materials along the axial direction of the filter rod segments during the movement further includes the following steps:

[0013] S32: Adjust the position of the composite filter rod formed after combination along the axial direction of the composite filter rod so that the multiple composite filter rods are aligned along the axial direction of the composite filter rod.

[0014] As an alternative to the composite filter rod forming method, in step S31, the position of the filter rod segment along the axial direction of the filter rod segment is adjusted by a stop or wind force.

[0015] In step S32, the position of the composite filter rod along the axial direction is adjusted by a stop or by wind.

[0016] As an alternative to the composite filter rod forming method, in step S3, the filter rod segments are supported by multiple sequentially arranged bearing grooves and combined to form a composite filter rod. The filter rod segments of different materials fall into the same bearing groove sequentially along the moving direction of the filter rod segments.

[0017] As an alternative to the composite filter rod forming method, in step S1, the raw material filter rod is cut during the process of driving the raw material filter rod to perform a circular motion.

[0018] As an alternative to the composite filter rod forming method, in step S2, during the process of driving the multiple segments of the filter rod after being cut to perform circular motion, the circumferential staggered arrangement of the multiple segments of the filter rod is adjusted.

[0019] A composite filter rod forming apparatus is provided, which processes the composite filter rod using the composite filter rod forming method described above. The composite filter rod forming apparatus includes:

[0020] At least two slitting drums, each of which is configured to drive the raw material filter rod of the corresponding material to rotate;

[0021] At least two cutting devices are provided, and each of the slitting drums is correspondingly provided with a cutting device, the cutting device being configured to slit the raw material filter rod on the corresponding slitting drum;

[0022] At least two staggered drums, each of the slitting drums is provided with a corresponding staggered drum, the staggered drum is used to receive the raw material filter rod after it has been slitted on the corresponding slitting drum, and the staggered drum drives the raw material filter rod after it has been slitted to rotate so that the multiple segments of the filter rod after it has been slitted are arranged in a staggered manner.

[0023] A translation drive device is configured to receive the misaligned filter rod segment and drive the misaligned filter rod segments to move along a plane.

[0024] As an optional solution for the composite filter rod forming device, at least two of the staggered drums are arranged sequentially along the moving direction of the filter rod segment, and the staggered drums are located above the translation drive device, which sequentially receives the filter rod segments conveyed by each of the staggered drums.

[0025] As an optional solution for the composite filter rod forming device, the translation drive device includes a translation drive assembly and multiple transmission plates. The multiple transmission plates are sequentially arranged on the conveying surface of the translation drive assembly along the conveying direction of the translation drive assembly. Multiple bearing grooves are spaced apart on the transmission plates along the conveying direction of the translation drive assembly. The bearing grooves are used to support the filter rod segments.

[0026] The beneficial effects of this invention are:

[0027] This invention provides a method for forming composite filter rods, comprising the following steps: S1: cutting at least two different types of raw material filter rods into multiple filter rod segments; S2: arranging the cut filter rod segments in a circumferentially staggered manner; S3: driving the staggered filter rod segments to move along a plane, and during the movement, combining the filter rod segments of different materials axially to form a composite filter rod. The composite filter rod forming method provided by this invention achieves the combination of filter rod segments during the plane-driven movement, ensuring that the filter rod segments are not affected by centrifugal force during the combination process, avoiding the problem of filter rod falling off, improving the stability of the composite filter rod forming process, and thus improving the forming efficiency.

[0028] The present invention also provides a composite filter rod forming device. By using the above-mentioned composite filter rod forming method to process composite filter rods, the filter rod segments are not affected by centrifugal force during the assembly process, thus avoiding the problem of rod falling off, improving the stability of the composite filter rod forming process, and thereby improving the forming efficiency. Attached Figure Description

[0029] Figure 1 This is a flowchart of the main process of the composite filter rod forming method provided in the embodiments of the present invention;

[0030] Figure 2 This is a detailed flowchart of the composite filter rod forming method provided in the embodiments of the present invention;

[0031] Figure 3 This is a schematic diagram of the composite filter rod forming device provided in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the composite filter rod forming process provided in an embodiment of the present invention.

[0033] In the picture:

[0034] 10. First raw material filter rod; 101. First filter rod section; 20. Second raw material filter rod; 201. Second filter rod section;

[0035] 30. Composite filter rod forming device; 1. Slitting drum; 2. Cutting device; 3. Offset drum; 4. Translation drive device; 41. Translation drive assembly; 42. Transmission plate; 421. Bearing groove; 5. Feeding assembly. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] In related technologies, composite filter rods are usually manufactured using a wheel-type composite molding method. Several drums are used to cut, assemble, and transport the filter rods in sequence. This causes the filter rods to move mostly in a circumferential direction during the molding process, making them susceptible to centrifugal force. Especially during the assembly of filter rods, the filter rods are prone to falling off under the action of centrifugal force, which greatly reduces the stability of the composite filter rod molding process and thus affects the molding efficiency of the composite filter rods.

[0041] To solve the above problems, such as Figure 1 As shown, this embodiment provides a method for forming a composite filter rod, which includes the following steps:

[0042] S1: Perform a cutting operation on at least two different types of raw material filter rods to cut the raw material filter rods of different materials into multiple filter rod segments;

[0043] S2: Arrange the circumferentially staggered filter rod segments after slicing;

[0044] S3: Drive the staggered multi-segment filter rods to move along the plane, and during the movement, filter rods of different materials are combined in the axial direction of the filter rods to form a composite filter rod.

[0045] The composite filter rod forming method provided in this embodiment combines the filter rod segments during the process of driving the filter rod segments to move along the plane. This ensures that the filter rod segments are not affected by centrifugal force during the combination process, avoids the problem of the rods falling off, improves the stability of the composite filter rod forming process, and thus improves the forming efficiency.

[0046] Optionally, in this embodiment, as Figure 2 As shown, in step S3, the process of assembling filter rod segments of different materials along the axial direction of the filter rod segments during the movement includes the following steps:

[0047] S31: Along the moving direction of the filter rod segment, filter rod segments of different materials are received in sequence, and the position of the received filter rod segment along the axial direction of the filter rod segment is adjusted so that the latest received filter rod segment is inserted into the position to be assembled.

[0048] The above setup, by timely adjusting the axial position of the received filter rod segment, provides sufficient space for the next received filter rod segment, ensuring that the latest received segment falls precisely into the assembly position, thus completing the assembly of the entire composite filter rod. Furthermore, during the movement of the filter rod segments, different material filter rod segments are received sequentially, ensuring that different material filter rod segments fall sequentially into the assembly position, thereby completing the assembly of the composite filter rod and effectively improving production efficiency.

[0049] Optionally, such as Figure 2As shown, the assembly of filter rod segments of different materials along the axial direction during the movement also includes the following steps:

[0050] S32: Adjust the position of the composite filter rods formed after combination along the axial direction of the composite filter rods so that the multiple composite filter rods are aligned along the axial direction of the composite filter rods.

[0051] The above setup not only ensures the tight connection of each filter rod segment in the composite filter rod assembly, but also allows multiple composite filter rods to be output neatly, facilitating further processing of the composite filter rods.

[0052] Optionally, in step S31, the position of the filter rod segment along its axial direction is adjusted by a stop or by airflow. Specifically, when adjusting the position of the filter rod segment along its axial direction by a stop, the stop is installed at a position along the path of the filter rod segment during its movement, and a guide ramp is provided on the stop so that the filter rod segment is guided by the guide ramp during its movement, thereby adjusting the position of the filter rod segment along its axial direction. When adjusting the position of the filter rod segment along its axial direction by airflow, a blower or suction nozzle is installed at a position along the path of the filter rod segment during its movement, and the position of the filter rod segment along its axial direction is adjusted by the blowing force of the blower or the suction force generated by the suction nozzle.

[0053] Optionally, in step S32, the axial position of the composite filter rod is adjusted by using blocks or airflow. Specifically, when adjusting the axial position of the composite filter rod by blocks, alignment blocks are provided on both sides of the composite filter rod along its axial direction, and each alignment block has a guide slope on the side facing the composite filter rod. The guide slope is inclined towards the side of the composite filter rod along its moving direction, thereby ensuring that during the conveying process, the two guide slopes work together to guide the composite filter rod to be centered and aligned. When adjusting the axial position of the composite filter rod by airflow, a blower or suction nozzle is installed at the position along the composite filter rod's movement path, and the axial position of the composite filter rod is adjusted by the blowing force of the blower or the suction force generated by the suction nozzle.

[0054] Optionally, refer to Figure 3As shown, in step S3, filter rod segments of different materials are received by multiple sequentially arranged bearing grooves 421 and combined to form a composite filter rod. These segments fall sequentially into the same bearing groove 421 along the moving direction of the filter rod segments. By ensuring that the filter rod segments of different materials that make up a composite filter rod fall sequentially into the same bearing groove 421, not only is the stability of the bearing and conveying of the filter rod segments ensured, preventing the problem of rods falling off during assembly, but the assembly of filter rod segments of different materials can also be completed directly during the conveying process, improving production efficiency. Furthermore, by ensuring that the filter rod segments of different materials that make up a composite filter rod fall sequentially into the same bearing groove 421, the composite filter rod can be directly produced by twisting and forming, which is more efficient than the rolling forming technology using a forming machine in related technologies.

[0055] Optionally, refer to Figure 3 and Figure 4 As shown, in step S1, the raw material filter rod is cut during the circular motion of the filter rod, thereby shortening the path of the filter rod and making the layout more compact and reasonable.

[0056] Optionally, in step S2, during the process of driving the cut filter rod segments to perform circular motion, the circumferential staggered arrangement of the filter rod segments is adjusted to make the layout more compact and reasonable.

[0057] like Figure 3 and Figure 4 As shown, this embodiment also provides a composite filter rod forming device 30. The composite filter rod forming device 30 processes composite filter rods using the above-described composite filter rod forming method. The composite filter rod forming device 30 includes a translation drive device 4, at least two slitting drums 1, at least two cutting devices 2, and at least two misaligned drums 3. Each slitting drum 1 is configured to drive the corresponding material filter rod to rotate. Each slitting drum 1 is correspondingly provided with a cutting device 2, which is configured to slit the corresponding material filter rod on the slitting drum 1. Each slitting drum 1 is correspondingly provided with a misaligned drum 3, which is used to receive the slitted material filter rod on the corresponding slitting drum 1. The misaligned drum 3 drives the slitted material filter rod to rotate so that the slitted multiple filter rod segments are misaligned. The translation drive device 4 is configured to receive the misaligned filter rod segments and drive the misaligned multiple filter rod segments to move along a plane (from left to right in the figure).

[0058] The composite filter rod forming device 30 provided in this embodiment processes composite filter rods using the above-described composite filter rod forming method, so that the filter rod segments are not affected by centrifugal force during the assembly process, avoiding the problem of rod falling off, improving the stability of the composite filter rod forming process, and thus improving the forming efficiency.

[0059] Optionally, in this embodiment, at least two staggered drums 3 are arranged sequentially along the moving direction of the filter rod segment, and the staggered drums 3 are located above the translation drive device 4. The translation drive device 4 sequentially receives the filter rod segments transported by each staggered drum 3, thereby ensuring that the translation drive device 4 sequentially receives filter rod segments of different materials during the process of driving the filter rod segments to move, ensuring that filter rod segments of different materials fall sequentially into the position to be combined, thereby completing the combination of composite filter rods.

[0060] It should be noted that the specific structure and working principle of the slitting drum 1 driving the raw material filter rods in circular motion are existing technologies and will not be described in detail here. It should also be noted that the specific structure and working principle of the staggered arrangement of the slitting filter rod segments caused by the misaligned drum 3 driving the slitting raw material filter rods in rotation are existing technologies and will not be described in detail here.

[0061] Optionally, the slitting drum 1 can be set to rotate clockwise or counterclockwise, and the misaligned drum 3 can also be set to rotate clockwise or counterclockwise, as long as the rotation directions of the slitting drum 1 and the misaligned drum 3 are opposite. In this embodiment, the slitting drum 1 is set to rotate clockwise, the misaligned drum 3 is set to rotate counterclockwise, and the translation drive device 4 drives the composite filter rod to move from left to right.

[0062] Optionally, in this embodiment, as Figure 4 As shown, the translation drive device 4 includes a translation drive assembly 41 and multiple transmission plates 42. The multiple transmission plates 42 are sequentially arranged on the conveying surface of the translation drive assembly 41 along the conveying direction of the translation drive assembly 41. Multiple bearing grooves 421 are spaced apart on the transmission plates 42 along the conveying direction of the translation drive assembly 41. These bearing grooves 421 are used to support filter rod segments. This arrangement ensures that filter rod segments of different materials forming a composite filter rod fall sequentially into the same bearing groove 421, guaranteeing the stability of the filter rod segment support and conveying, preventing rod drop during assembly, and enabling the direct assembly of filter rod segments of different materials during conveying, thus improving production efficiency. Furthermore, by ensuring that filter rod segments of different materials forming a composite filter rod fall sequentially into the same bearing groove 421, subsequent composite filter rod production can be directly achieved through twisting and forming, which is more efficient than the rolling forming technology using a forming machine in related technologies.

[0063] Optionally, in this embodiment, the translation drive component 41 can be a belt conveyor component. Since the specific structure and working principle of the belt conveyor component are existing technologies, they will not be described in detail here.

[0064] It should be noted that the cutting device 2 includes multiple cutters, which are arranged at intervals along the axial direction of the raw material filter rods on the corresponding cutting drum 1. As the raw material filter rods rotate, they pass through the multiple cutters and are cut into multiple filter rod segments. It should be noted that when the raw material filter rods need to be cut into N filter rod segments, the cutting device 2 needs to include N-1 cutters, where N is a positive integer greater than 1.

[0065] In addition, the composite filter rod forming device 30 provided in this embodiment also includes a feeding component 5. Each slitting drum 1 is correspondingly provided with a feeding component 5, which is used to transport the raw material filter rod of the corresponding material to the corresponding slitting drum 1. Optionally, the feeding component 5 is in the form of a feeding trough.

[0066] This embodiment uses a composite filter rod composed of two different materials as an example for illustration:

[0067] Reference Figure 3 and Figure 4 As shown, the composite filter rod forming device 30 includes a translation drive device 4, two slitting drums 1, two cutting devices 2, two staggered drums 3, and two feeding assemblies 5. The feeding assembly 5 on the left conveys the first raw material filter rod 10 to the corresponding slitting drum 1 on the left. During the rotation of the first raw material filter rod 10 driven by the slitting drum 1, it is cut into multiple first filter rod segments 101 by multiple cutters in the corresponding cutting device 2. The staggered drum 3 on the left receives the first filter rod segments 101 after slitting and drives the first filter rod segments 101 to be staggered during rotation. The first filter rod 20 is fed to the translation drive device 4. The feeding assembly 5 on the right side feeds the second raw material filter rod 20 to the corresponding cutting drum 1 on the right side. During the rotation of the second raw material filter rod 20 driven by the cutting drum 1, it is cut into multiple segments 201 by multiple cutters in the corresponding cutting device 2. The staggered drum 3 on the right side receives the segmented second filter rod 201 and drives the segmented second filter rod 201 to be staggered during the rotation and fed to the translation drive device 4, so that the first filter rod segment 101 and the second filter rod segment 201 are combined into a composite filter rod.

[0068] For example, the length of the first raw material filter rod 10 is 88mm, and the length of the second raw material filter rod 20 is 96mm. To cut the first raw material filter rod 10 into six segments, five cutters are needed on the corresponding cutting device 2. The lengths of the six segments 101 after cutting are 11mm, 11mm, 22mm, 22mm, 11mm, and 11mm respectively. To cut the second raw material filter rod 20 into four segments, three cutters are needed on the corresponding cutting device 2. The length of the four segments 201 after cutting is 24mm. The staggered drum 3 on the left drives the staggered arrangement of the cut segments 101 during rotation and conveys them to the translation drive device 4. Each bearing groove in the translation drive device 4... Each of the 421 sections carries three first filter rod segments 101 arranged axially at intervals. The lengths of each segment along the axial direction are 11mm, 22mm, and 11mm respectively. The staggered drum 3 on the right side drives the slit second filter rod segments 201 to be staggered during rotation. When the segments are conveyed to the translation drive device 4, a 24mm long second filter rod segment 201 falls between two adjacent first filter rod segments 101 along the axial direction, ensuring that the total length of the composite rod after assembly is 92mm. The filter rod segments along their axial direction are, in order, a 11mm long first filter rod segment 101, a 24mm long second filter rod segment 201, a 22mm long first filter rod segment 101, a 24mm long second filter rod segment 201, and an 11mm long first filter rod segment 101.

[0069] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for forming a composite filter rod, characterized in that, Includes the following steps: S1: Perform a cutting operation on at least two different types of raw material filter rods to cut the raw material filter rods of different materials into multiple filter rod segments; S2: Arrange the multiple segments of the cut filter rod in a circumferentially staggered manner; S3: Drive the multiple filter rod segments arranged in a staggered manner to move along the plane, and during the movement, combine the filter rod segments of different materials in the axial direction of the filter rod segments to form the composite filter rod.

2. The composite filter rod forming method according to claim 1, characterized in that, In step S3, the process of assembling the filter rod segments of different materials along the axial direction of the filter rod segments during movement includes the following steps: S31: Along the moving direction of the filter rod segment, filter rod segments of different materials are received in sequence, and the position of the received filter rod segment along the axial direction of the filter rod segment is adjusted so that the latest received filter rod segment is inserted into the position to be assembled.

3. The composite filter rod forming method according to claim 2, characterized in that, The step of assembling the filter rod segments of different materials along the axial direction during the movement further includes the following steps: S32: Adjust the position of the composite filter rod formed after combination along the axial direction of the composite filter rod so that the multiple composite filter rods are aligned along the axial direction of the composite filter rod.

4. The composite filter rod forming method according to claim 3, characterized in that, In step S31, the position of the filter rod segment along the axial direction is adjusted by a stop or wind force; In step S32, the position of the composite filter rod along the axial direction is adjusted by a stop or by wind.

5. The method for forming composite filter rods according to any one of claims 1 to 4, characterized in that, In step S3, the filter rod segments are received by multiple sequentially arranged bearing grooves (421) and combined to form a composite filter rod. The filter rod segments of different materials fall into the same bearing groove (421) in sequence along the moving direction of the filter rod segments.

6. The method for forming composite filter rods according to any one of claims 1 to 4, characterized in that, In step S1, the raw material filter rod is cut during the circular motion of the filter rod.

7. The method for forming composite filter rods according to any one of claims 1 to 4, characterized in that, In step S2, during the process of driving the multiple segments of the filter rod to perform circular motion, the circumferential misalignment of the multiple segments of the filter rod is adjusted.

8. A composite filter rod forming device, characterized in that, The composite filter rod is processed using the composite filter rod forming method according to any one of claims 1 to 7, wherein the composite filter rod forming apparatus comprises: At least two slitting drums (1), each of the slitting drums (1) being configured to drive the raw material filter rod of the corresponding material to rotate; At least two cutting devices (2), each of the slitting drums (1) is provided with a corresponding cutting device (2), and the cutting device (2) is configured to slit the raw material filter rod on the corresponding slitting drum (1); At least two staggered drums (3), each of the cutting drums (1) is provided with a staggered drum (3), the staggered drum (3) is used to receive the cut raw material filter rod on the corresponding cutting drum (1), and the staggered drum (3) drives the cut raw material filter rod to rotate so that the multiple cut filter rod segments are staggered; Translation drive device (4), which is configured to receive the misaligned filter rod segment and drive the misaligned filter rod segments to move along the plane.

9. The composite filter rod forming device according to claim 8, characterized in that, At least two of the misaligned drums (3) are arranged sequentially along the moving direction of the filter rod segment, and the misaligned drums (3) are located above the translation drive device (4), which sequentially receives the filter rod segments transported by each of the misaligned drums (3).

10. The composite filter rod forming device according to claim 8, characterized in that, The translation drive device (4) includes a translation drive assembly (41) and a plurality of transmission plates (42). The plurality of transmission plates (42) are arranged sequentially on the transmission surface of the translation drive assembly (41) along the transmission direction of the translation drive assembly (41). A plurality of bearing grooves (421) are spaced apart on the transmission plates (42) along the transmission direction of the translation drive assembly (41). The bearing grooves (421) are used to support the filter rod segments.

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