Hollow filter rod forming device

Abstract

The invention discloses a hollow filter stick forming device, which comprises a high-pressure nozzle, a wire outlet cylinder, a wire outlet nozzle, a wire outlet nozzle and a wire outlet nozzle, the wire feeding part comprises a wire feeding section extending into the barrel cavity, a wire feeding section and a connecting rod, the wire feeding section comprises a first wire feeding channel and a mounting base used for mounting the second end of the connecting rod, and the wire feeding section comprises a second wire feeding channel communicated with the first wire feeding channel; an outlet of the second wire feeding channel is located in the barrel cavity, the cross sectional area of the outlet of the second wire feeding channel is smaller than that of an inlet of the first wire feeding channel, and the relative angle between the wire feeding section and the wire feeding section in the moving direction of the wire bundle can be adjusted. The wire feeding section is connected with the surface of the cavity wall of the cylinder cavity in a sealed mode, an annular cavity communicated with the air inlet is formed between the outer surface of the wire feeding section and the cylinder cavity, the size of the cross section area of the annular cavity is gradually reduced in the moving direction of the tows, and the relative position of the wire feeding section and the cylinder cavity can be adjusted in the moving direction of the tows.

Description

Technical Field

[0001] The invention relates to the technical field of cigarette equipment, and in particular to a hollow filter rod forming device. Background Art

[0002] In the filter rod production process, after the opener opens the tow, the high-pressure nozzle of the hollow filter rod forming device gathers the ribbon-shaped tow around the connecting rod connected to the core shaft to form a hollow bundled tow and uses high-pressure airflow to make the bundled tow fluffy. After the tow passes through the core shaft, it is formed by the steam component and the mold component to form a filter rod. The high-pressure nozzle of the existing hollow filter rod forming device, after a stable airflow is introduced, uses the airflow to fluff the tow, but cannot conveniently adjust the tow fluffing capacity according to different conditions of the tow, such as the thickness of the tow, the material of the tow, etc. Summary of the invention

[0003] The object of the present invention is to provide a hollow filter rod forming device having a high-pressure nozzle capable of conveniently adjusting the bulkiness of a tow.

[0004] The present invention discloses a hollow filter rod forming device, comprising:

[0005] High pressure nozzles, including:

[0006] A wire outlet drum, comprising a drum cavity and an air inlet provided on the drum wall and communicating with the drum cavity;

[0007] A wire feeding section, used for entering a wire bundle and outputting the wire bundle to the barrel cavity, comprises a wire feeding section extending into the barrel cavity, a wire feeding section located upstream of the wire feeding section along the moving direction of the wire bundle and connected to the wire feeding section, and a connecting rod having a first end connected to a core shaft forming a hollow cavity of a filter rod and passing through the wire feeding section, the wire feeding section comprises a first wire feeding channel and a mounting seat for mounting the second end of the connecting rod, the projection of the mounting seat on a plane perpendicular to the moving direction of the wire bundle is located in the middle of the first wire feeding channel, and the wire feeding section comprises a second wire feeding channel connected to the first wire feeding channel The outlet of the second wire feeding channel is located in the barrel cavity and its cross-sectional area is smaller than the cross-sectional area of ​​the inlet of the first wire feeding channel. The relative angle between the wire feeding section and the wire feeding section is adjustable around the moving direction of the wire bundle. The wire feeding section is sealed and connected to the wall surface of the barrel cavity, and an annular cavity connected to the air inlet is formed between the outer surface of the wire feeding section and the barrel cavity. Along the moving direction of the wire bundle, the cross-sectional area of ​​the annular cavity gradually decreases. Along the moving direction of the wire bundle, the relative position of the wire feeding section and the barrel cavity is adjustable.

[0008] In some embodiments, a first threaded connection structure is further provided between the wire feeding segment and the cavity wall surface of the barrel cavity, and the wire feeding segment adjusts its relative position with the barrel cavity along the moving direction of the wire bundle through the first threaded connection structure and realizes a sealed connection between it and the cavity wall surface.

[0009] In some embodiments, the outer surface of the wire feeding segment includes a tapered surface, and the cavity wall surface of the barrel cavity is a tapered surface coaxial with the outer surface of the wire feeding segment.

[0010] In some embodiments, it also includes a second threaded connection structure provided between the wire feeding section and the wire feeding section, and the wire feeding section adjusts the relative angle of the moving direction of the wire bundle around the wire bundle and the wire feeding section through the second threaded connection structure.

[0011] In some embodiments, the first wire feed channel is a circular channel, the mounting seat is a cylindrical mounting seat located in the middle of the first wire feed channel, the wire feed section also includes a connecting portion connecting the cylindrical mounting seat and the wall of the first wire feed channel, the connecting portion includes a first surface and a second surface located on opposite sides connecting the cylindrical mounting seat and the wall of the first wire feed channel, the first surface and the second surface are both tangent to the outer surface of the cylindrical mounting seat and the wall of the first wire feed channel.

[0012] In some embodiments, the second wire feed channel is a conical channel.

[0013] In some embodiments, it also includes a pre-gathering component located upstream of the wire feeding section along the moving direction of the wire bundle, the pre-gathering component includes one or more pre-gathering mechanisms, the pre-gathering mechanism includes a frame and a pre-gathering component connected to the frame, the pre-gathering component includes a U-shaped component, and the U-shaped component is used to surround the wire bundle and apply pressure to the wire bundle before the wire bundle enters the first wire feeding channel.

[0014] In some embodiments, the pre-folding component further includes an intermediate component connected between the frame and the pre-folding component, and the pre-folding component is rotatably mounted on the intermediate component relative to the intermediate component.

[0015] In some embodiments, the intermediate component includes a first component connected to the frame and a second component that can slide relative to the first component, and the pre-folding member is rotatably and adjustably mounted on the second component relative to the second component.

[0016] In some embodiments, the pre-gathering component includes a plurality of pre-gathering mechanisms, and the plurality of pre-gathering mechanisms are arranged at intervals along the moving direction of the tow.

[0017] Based on the hollow filter rod forming device provided by the present invention, when the high-pressure nozzle gathers the filament bundle around the connecting rod to form a bundled filament bundle and fluffs the bundled filament bundle, the fluffing capacity can be adjusted according to different conditions of the filament bundle, so that the fluffing effect is more matched with the filament bundle, and the adjustment process is convenient and reliable.

[0018] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic structural diagram of a portion of a hollow filter rod forming device according to an embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a part of the high-pressure nozzle of a hollow filter rod forming device according to another embodiment of the present invention;

[0022] Figure 3 A schematic structural diagram of a part of the high-pressure nozzle of a hollow filter rod forming device according to another embodiment of the present invention;

[0023] Figure 4 A schematic cross-sectional view of a part of the structure of a high-pressure nozzle of a hollow filter rod forming device according to another embodiment of the present invention;

[0024] Figure 5 for Figure 4 An exploded view of a cross-sectional structure of the structure shown;

[0025] Figure 6 A schematic structural diagram of a part of the high-pressure nozzle of a hollow filter rod forming device according to another embodiment of the present invention;

[0026] Figure 7 A schematic structural diagram of a pre-folding mechanism of a hollow filter rod forming device according to another embodiment of the present invention;

[0027] Figure 8 for Figure 7 A schematic structural diagram of the structure shown from another angle. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0030] In the description of the present invention, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0033] When a hollow filter rod forming device in the prior art, such as a filter rod forming machine, produces a hollow filter rod, after an opener opens the filament bundle, the filament bundle is sent to a high-pressure nozzle for gathering and fluffing. A connecting rod connected to the core shaft and a mounting seat for installing the connecting rod are installed in the high-pressure nozzle, and the high-pressure nozzle cannot adjust the fluffing ability of the filament bundle.

[0034] like Figures 1 to 6 As shown, the hollow filter rod forming device of this embodiment includes a high-pressure nozzle 610. The high-pressure nozzle 610 includes a wire outlet cylinder 1 and a wire inlet portion.

[0035] The wire outlet drum 1 comprises a drum cavity and an air inlet arranged on the drum wall and connected to the drum cavity. The air inlet is connected to an air supply duct. The air supply duct inputs a high-pressure airflow and sends it into the drum cavity of the wire outlet drum 1 through the air inlet.

[0036] The wire feeding section is used to feed the wire bundle 600 and output the wire bundle 600 to the barrel cavity. In the embodiment shown in the figure, the wire bundle 600 is initially transported to the high-pressure nozzle as a flat ribbon-shaped wire bundle, gathered by the pre-gathering device, and then sent to the wire feeding section. After further gathering in the wire feeding section, it is output from the wire feeding section to the barrel cavity, and then output from the barrel cavity to the outside of the wire outlet barrel. After the high-pressure airflow enters the barrel cavity, it is output from the barrel cavity, and the wire bundle is fluffed outside the wire outlet barrel 1. Figure 1 As shown, the tow is formed into a ball-like fluffy shape.

[0037] The wire feeding section includes a wire feeding section 2 extending into the barrel cavity, a wire feeding section 3 located upstream of the wire feeding section 2 along the moving direction of the wire bundle 600 and connected to the wire feeding section 2, and a connecting rod 4. Figure 1In the embodiment shown, the direction is from right to left, that is, along the axial direction of the high-pressure nozzle, from the wire bundle inlet of the high-pressure nozzle to the direction of the wire bundle outlet (right and left are based on the left and right directions of the reader). The connecting rod 4 passes through the wire feeding section 2, and the first end of the connecting rod 4 is used to connect with the mandrel 620 that forms the hollow cavity of the filter rod. The wire feeding section 3 includes a first wire feeding channel 31 and a mounting seat 32 for mounting the second end of the connecting rod 4, and the second end of the connecting rod is mounted on the mounting seat 32. After entering the high-pressure nozzle, the wire bundle gradually gathers around the connecting rod, and then outputs the high-pressure nozzle in a circular shape that almost completely surrounds the connecting rod. After passing through the mandrel 620, it is sent into the steam component and the mold component in a nearly hollow circular shape to form a hollow filter rod. On a plane perpendicular to the moving direction of the wire bundle 600 (that is, the cross section of the high-pressure nozzle in the embodiment shown in the figure), the projection of the mounting seat 32 is located in the middle of the first wire feeding channel 31, so that the wire bundle can gradually gather towards the middle after entering the wire feeding section. The wire feeding segment 2 includes a second wire feeding channel 22 connected to the first wire feeding channel 31. The outlet of the second wire feeding channel 22 is located in the barrel cavity and its cross-sectional area is smaller than the cross-sectional area of ​​the inlet of the first wire feeding channel 31. The relative angle between the wire feeding segment 3 and the wire feeding segment 2 can be adjusted around the moving direction of the wire bundle 600. In the embodiment shown in the figure, the wire feeding segment 3 and the wire feeding segment 2 can rotate relative to each other around the axis of the high-pressure nozzle to adjust the relative angle between the two. The wire feeding segment 2 is sealed and connected to the wall surface of the barrel cavity, and an annular cavity 120 connected to the air inlet is formed between the outer surface of the wire feeding segment 2 and the barrel cavity. Along the moving direction of the wire bundle 600, the cross-sectional area of ​​the annular cavity 120 gradually decreases. Along the moving direction of the wire bundle 600, that is, the axial direction of the high-pressure nozzle in the embodiment shown in the figure, the relative position of the wire feeding segment 2 and the barrel cavity can be adjusted. When the relative position of the wire feeding segment 2 and the barrel cavity is adjusted along the axial direction of the high-pressure nozzle, as shown in the figure, Figure 4 and Figure 6 As shown, the length of the annular cavity 120 along the axis direction of the high-pressure nozzle is also adjusted, and the size of the cross section when the high-pressure airflow is output from the annular cavity also changes, so that the speed of the high-pressure airflow output to the outside of the wire barrel is also adjusted, so that the fluffing ability of the wire bundle can be adjusted. Since the relative angle between the wire feeding section 3 and the wire feeding section 2 in the moving direction of the wire bundle 600 can be adjusted, when the relative position of the wire feeding section 2 and the barrel cavity along the axis direction of the high-pressure nozzle is adjusted, the relative angle between the wire feeding section 3 and the wire feeding section 2 in the moving direction of the wire bundle 600 can be adjusted, so that the angular position of the wire feeding section 3 in the moving direction of the wire bundle 600 can be kept unchanged, and the wire bundle 600 entering the first channel will not be affected and can still smoothly enter the first channel, and finally a stable and reliable hollow filter rod is formed.

[0038] In the hollow filter rod forming device of this embodiment, when the high-pressure nozzle 610 gathers the filament bundle 600 around the connecting rod 4 to form the bundled filament bundle 600 and fluffs the bundled filament bundle 600, the fluffing ability can be adjusted according to different conditions of the filament bundle 600, so that the fluffing effect is more matched with the filament bundle 600, and the adjustment process is convenient and reliable.

[0039] In some embodiments, Figures 4 to 6 As shown, the hollow filter rod forming device also includes a first threaded connection structure 51 provided between the wire feeding section 2 and the cavity wall surface of the barrel cavity, and the wire feeding section 2 adjusts its relative position with the barrel cavity along the moving direction of the wire bundle 600 and realizes its sealed connection with the cavity wall surface through the first threaded connection structure 51. In the embodiment shown in the figure, the first threaded connection structure 51 includes an internal thread provided on the cavity wall surface of the barrel cavity and an external thread provided on the outer surface of the wire feeding section 2 that cooperates with the above-mentioned internal thread. The relative position between the wire feeding section 2 and the barrel cavity along the moving direction of the wire bundle can be conveniently adjusted by rotating the wire feeding section 2. At the same time, the first threaded connection structure 51 forms a comb-teeth sealing structure between the wire feeding section 2 and the barrel cavity, which can form an effective sealing connection and form a seal for the high-pressure airflow entering the barrel cavity.

[0040] In some embodiments, Figure 4 As shown, the outer surface of the wire feeding section 2 includes a conical surface, and the wall surface of the barrel cavity is a conical surface coaxial with the outer surface of the wire feeding section 2. This embodiment can form a conical annular cavity between the wire feeding section and the barrel cavity, and when passing through the annular cavity, the flow rate of the high-pressure airflow can be stably increased, and the flow rate of the high-pressure airflow can also be conveniently adjusted.

[0041] In some embodiments, as shown in the figure, the hollow filter rod forming device also includes a second threaded connection structure 52 provided between the wire feed segment 3 and the wire feeding segment 2, and the wire feed segment 3 adjusts the relative angle between the moving direction of the wire bundle 600 and the wire feeding segment 2 through the second threaded connection structure 52. The structure of the second threaded connection structure 52 is similar to the first threaded connection structure 51, and in the embodiment shown in the figure, it includes an external thread provided on the wire feed segment 3 and an internal thread provided on the wire feeding segment 2 that cooperates with the external thread. In the embodiment shown in the figure, a threaded hole 53 is also provided on the wire feed segment 3, which is used to install a top wire to press the surface of the wire feeding segment 2, so as to press and lock the relative angle position of the adjusted wire feed segment 3 and the wire feeding segment 2.

[0042] In some embodiments, Figures 2 to 3As shown, the first wire feeding channel 31 is a circular channel, and the wall surface of the first wire feeding channel 31 is a cylindrical surface. The mounting seat 32 is a cylindrical mounting seat 32 located in the middle of the first wire feeding channel 31. As shown in the figure, the outer surface of the cylindrical mounting seat 32 is a cylindrical surface, and the cylindrical mounting seat 32 also includes a cylindrical mounting hole for mounting the second end of the connecting rod. The wire feeding section 3 also includes a connecting portion 33 connecting the cylindrical mounting seat 32 and the wall of the first wire feeding channel 31. The connecting portion 33 includes a first surface 331 and a second surface 332 located on opposite sides connecting the cylindrical mounting seat 32 and the wall of the first wire feeding channel 31. The first surface 331 and the second surface 332 are both tangent to the outer surface of the cylindrical mounting seat 32 and the wall of the first wire feeding channel 31 at the same time, so that a waist-shaped hole is formed between the cylindrical mounting seat 32, the connecting portion 33 and the wall of the first wire feeding channel 31. When the wire bundle in this embodiment enters the first wire feeding channel 31, it enters from the waist-shaped hole and gradually gathers around the cylindrical mounting seat 32. Since the first surface 331 and the second surface 332 are both tangent to the outer surface of the cylindrical mounting seat 32 and the wall of the first wire feeding channel 31 at the same time, the wire bundle can enter the first wire feeding channel more smoothly and can be gathered more evenly and effectively.

[0043] In some embodiments, Figure 4 and Figure 6 As shown, the second wire feeding channel 22 is a conical channel. In this embodiment, when the wire bundle passes through the second wire feeding channel 22, the wire bundle can be gathered more evenly, and the gathering effect of the wire bundle is improved.

[0044] In some embodiments, Figure 1 and Figure 7 , Figure 8As shown, the hollow filter rod forming device also includes a pre-folding component 63 located upstream of the wire feeding section 3 along the moving direction of the wire bundle 600. The pre-folding component 630 includes more than one pre-folding mechanism 7, and the pre-folding mechanism 7 includes a frame and a pre-folding component connected to the frame. The frame can be set to be connected to the high-pressure nozzle, or it can be set without being connected to the high-pressure nozzle, and the frame is set separately. The pre-folding component includes a U-shaped component 73, and the U-shaped component 73 is used to surround the wire bundle 600 and apply pressure to the wire bundle 600 before the wire bundle 600 enters the first wire feeding channel 31. In the embodiment shown in the figure, when the wire bundle is transported to the high-pressure nozzle, it is transported in a flat belt form, and its cross section is approximately a straight line. If the pre-folding component is not provided, the folding effect of the wire bundle when passing through the high-pressure nozzle may not be good enough, and it may not be possible to completely wrap the core shaft 360 degrees when wrapping the core shaft, and there may be a "gap" extending along the axial direction in the circumferential direction, that is, there is a situation where the wrapping is not tight, and the formed filter rod product is easy to cause pipe wall cracks that are not easy to find. A pre-gathering component is provided. Before the filament bundle enters the high-pressure nozzle, the U-shaped member 73 surrounds the filament bundle 600 and applies pressure to the filament bundle 600. The size of the filament bundle 600 in the width direction becomes smaller. The filament bundle 600 is surrounded and squeezed by the U-shaped member 73 in the width direction. Thus, the contour in the width direction is gathered toward the center of the U-shaped member. The filament bundle enters the high-pressure nozzle after being pre-gathered, which can improve the gathering effect and better wrap the core shaft when passing through the core shaft.

[0045] In some embodiments, the pre-gathering member 630 further includes an intermediate member connected between the frame and the pre-gathering member, and the pre-gathering member is mounted on the intermediate member so as to be rotatable and adjustable relative to the intermediate member. As shown in the figure, the pre-gathering member is rotatable and adjustable relative to the intermediate member, that is, the U-shaped member 73 can adjust the angle of the surrounding tow, for example, Figure 1 , 7 In the embodiment shown in FIG. 8 , one end of the U-shaped member 73 is connected to the middle member, for example, by hinges, and the U-shaped member 73 adjusts the angle between the U-shaped member 73 and the cross section of the tow by rotating its end relative to the middle member, thereby adjusting the pre-gathering effect on the tow. This embodiment can adjust the pre-gathering effect according to the different conditions of the tow, and achieve better matching pre-gathering of tows of different types, thicknesses, etc.

[0046] In some embodiments, Figure 7 , 8 As shown, the middle component includes a first component 71 connected to the frame and a second component 72 that can slide relative to the first component 71, and the pre-folding member is rotatably adjusted relative to the second component 72. Through the relative sliding of the first component 71 and the second component 72, the U-shaped member 73 can be contacted at different positions of the tow, and the pre-folding process can be further adjusted.

[0047] In some embodiments, Figure 1As shown, the pre-gathering component 630 includes a plurality of pre-gathering mechanisms 7, and the plurality of pre-gathering mechanisms 7 are arranged at intervals along the moving direction of the yarn bundle 600, so as to realize the step-by-step pre-gathering of the yarn bundle and improve the pre-gathering effect.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A hollow filter rod forming device, characterized in that: include: High pressure nozzles, including: A wire outlet drum, comprising a drum cavity and an air inlet provided on the drum wall and communicating with the drum cavity; A wire feeding section, used for entering a wire bundle and outputting the wire bundle to the barrel cavity, comprises a wire feeding section extending into the barrel cavity, a wire feeding section located upstream of the wire feeding section along the moving direction of the wire bundle and connected to the wire feeding section, and a connecting rod having a first end connected to a core shaft forming a hollow cavity of a filter rod and passing through the wire feeding section, the wire feeding section comprises a first wire feeding channel and a mounting seat for mounting the second end of the connecting rod, the projection of the mounting seat on a plane perpendicular to the moving direction of the wire bundle is located in the middle of the first wire feeding channel, and the wire feeding section comprises a second wire feeding channel connected to the first wire feeding channel The outlet of the second wire feeding channel is located in the barrel cavity and its cross-sectional area is smaller than the cross-sectional area of ​​the inlet of the first wire feeding channel. The relative angle between the wire feeding section and the wire feeding section is adjustable around the moving direction of the wire bundle. The wire feeding section is sealed and connected to the wall surface of the barrel cavity, and an annular cavity connected to the air inlet is formed between the outer surface of the wire feeding section and the barrel cavity. Along the moving direction of the wire bundle, the cross-sectional area of ​​the annular cavity gradually decreases. Along the moving direction of the wire bundle, the relative position of the wire feeding section and the barrel cavity is adjustable.

2. The hollow filter rod forming device according to claim 1, characterized in that: It also includes a first threaded connection structure provided between the wire feeding section and the cavity wall surface of the barrel cavity, and the wire feeding section adjusts its relative position with the barrel cavity along the moving direction of the wire bundle through the first threaded connection structure and realizes its sealed connection with the cavity wall surface.

3. The hollow filter rod forming device according to claim 2, characterized in that: The outer surface of the wire feeding segment includes a tapered surface, and the cavity wall surface of the barrel cavity is a tapered surface coaxial with the outer surface of the wire feeding segment.

4. The hollow filter rod forming device according to claim 1, characterized in that: It also includes a second threaded connection structure provided between the wire feeding section and the wire feeding section, and the wire feeding section adjusts the relative angle of the moving direction of the wire bundle around the wire bundle and the wire feeding section through the second threaded connection structure.

5. The hollow filter rod forming device according to claim 4, characterized in that: The first wire feed channel includes a circular channel, the mounting seat is a cylindrical mounting seat located in the middle of the first wire feed channel, the wire feed section also includes a connecting portion connecting the cylindrical mounting seat and the wall of the first wire feed channel, the connecting portion includes a first surface and a second surface located on opposite sides connecting the cylindrical mounting seat and the wall of the first wire feed channel, the first surface and the second surface are both tangent to the outer surface of the cylindrical mounting seat and the wall of the circular channel.

6. The hollow filter rod forming device according to claim 1, characterized in that: The second wire feeding channel is a conical channel.

7. The hollow filter rod forming device according to claim 1, characterized in that: It also includes a pre-gathering component located upstream of the wire feeding section along the moving direction of the wire bundle, the pre-gathering component includes more than one pre-gathering mechanism, the pre-gathering mechanism includes a frame and a pre-gathering component connected to the frame, the pre-gathering component includes a U-shaped component, and the U-shaped component is used to surround the wire bundle and apply pressure to the wire bundle before the wire bundle enters the first wire feeding channel.

8. The hollow filter rod forming device according to claim 7, characterized in that: The pre-folding component further comprises an intermediate component connected between the frame and the pre-folding component, and the pre-folding component is rotatably and adjustably mounted on the intermediate component relative to the intermediate component.

9. The hollow filter rod forming device according to claim 8, characterized in that: The intermediate component comprises a first component connected to the frame and a second component which can slide relative to the first component, and the pre-folding member is rotatably and adjustably mounted on the second component relative to the second component.

10. The hollow filter rod forming device according to claim 7, characterized in that: The pre-gathering component comprises a plurality of pre-gathering mechanisms, and the plurality of pre-gathering mechanisms are arranged at intervals along the moving direction of the tow.

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