Feeding and conveying device of injection part for visible cavity composite filter stick

Abstract

The invention relates to the technical field of production and manufacturing of special filter sticks for cigarettes, and provides a feeding and conveying device of an injection part for a visible cavity composite filter stick. A storage box; the spiral track structure is arranged in the vertical direction and comprises a climbing section and a material distributing section; the vibration disc is supported at the bottom of the spiral track structure and drives the spiral track structure to vibrate, so that the injection part on the spiral track structure spirally climbs upwards from the climbing section at the bottom to the material distribution section, the injection part is divided into multiple paths through the material distribution section and then continues to climb towards the top, and in the climbing movement process of the material distribution section, the injection part is separated from the material distribution section; single-row arrangement and posture correction of the injection parts in all the branches are completed through limiting and vibration of all the branches; and the plurality of conveying pipelines are correspondingly connected with the spiral tracks in the spiral track structure respectively, receive the injection parts conveyed by the spiral tracks respectively and transfer the injection parts to a next process device. The problems that the injection part feeding efficiency is low, and damage is likely to happen can be effectively solved.

Description

Technical Field

[0001] This invention relates to the field of special filter rod manufacturing technology for tobacco, and in particular to a feeding and conveying device for injection molding parts of a visible cavity composite filter rod. Background Technology

[0002] Currently, a variety of substances are added to the cavity of composite visible cavity filter rods, including inorganic clay particles, flavoring carrier particles, and injection components. These substances greatly improve the filtration efficiency of cigarette filters for harmful substances such as tar and nicotine, reduce the harm of cigarettes to the human body, and enhance the visual effect of cigarettes.

[0003] Using injection molded parts (rubber injection molded parts formed by an injection molding machine, which serve to enhance aesthetics and guide smoke after being inserted into the visible cavity filter rod) as the filler for the visible cavity filter rod places high demands on the molding equipment. From the feeding and transfer of the injection molded parts to the filling, precision and stability are required.

[0004] Currently, the feeding and conveying of the injection components added to traditional visible cavity composite filter rods mainly uses rough conveyor belts. During the feeding and conveying process, the injection components are prone to contact adhesion, posture deviation, and collisions, resulting in low feeding efficiency, chaotic feeding, and high damage rate. This fails to provide convenience for subsequent processes and leads to a decrease in overall production efficiency. Moreover, some damaged injection components can easily cause serious filter rod quality problems when entering the production stage, and they are not easy to detect and remove. This poses a serious quality hazard to the production of visible cavity injection filter rods, greatly increases the labor intensity of operators and quality inspectors, and reduces the production efficiency of visible cavity injection filter rods. Summary of the Invention

[0005] The purpose of this invention is to solve at least one technical problem in the background art and to provide a feeding and conveying device for injection molding of visible cavity composite filter rods.

[0006] To achieve the above objectives, the present invention provides a feeding and conveying device for injection molding parts of visible cavity composite filter rods, comprising: Negative pressure delivery assembly, providing injection components in the external suction structure; The storage bin receives the injection parts pumped and conveyed by the negative pressure conveying assembly; A spiral track structure receives the filling material provided by the storage bin. The spiral track structure is arranged vertically and includes a climbing section and a distributing section arranged from bottom to top. The vibratory feeder, supported at the bottom of the spiral track structure, drives the spiral track structure to vibrate, causing the injection parts on the spiral track structure to spirally climb from the bottom climbing section to the distribution section. After the injection parts are divided into multiple paths through the distribution section, they continue to climb towards the top. During the climbing motion in the distribution section, the injection parts are sorted and their posture is corrected in each path by limiting and vibrating each path. Multiple conveying pipes are connected to the corresponding spiral tracks in the spiral track structure, respectively receiving the injection components conveyed by each spiral track and transferring the injection components to the corresponding receiving pipe of the next device.

[0007] According to one aspect of the present invention, the climbing section is a single-track structure, the single-track structure comprising a single track and baffles disposed on the side of the single track; All injection components move upwards along a single track, and are confined on the track by baffles.

[0008] According to one aspect of the invention, the material distribution section includes: a plurality of injection molding limiting tracks; The limiting tracks of each injection part are arranged at intervals through hollowed-out gaps, the width of which is greater than the outer diameter of the injection part; The width of each of the aforementioned injection molding part limiting tracks is greater than the outer diameter of a single injection molding part and less than twice the outer diameter of a single injection molding part; Each of the aforementioned injection molding component limiting tracks includes a single-sided limiting segment and a double-sided limiting segment connected in sequence; The single-sided limiting section is close to the single track structure, and the double-sided limiting section is close to the conveying pipeline; A limiting baffle is provided on one side of the single-sided limiting section; Both sides of the double-sided limiting section are equipped with limiting baffles; The height of the limit baffle is greater than the outer diameter of the injection part.

[0009] According to one aspect of the invention, each of the injection molding limiting tracks further includes: a fully enclosed section; The fully enclosed section connects to the double-sided limiting section, receives the injection piece transmitted by the double-sided limiting section, and fully encloses and seals the injection piece; The fully enclosed section is a cylindrical structure, and its outer diameter is smaller than that of the double-sided limiting section.

[0010] According to one aspect of the present invention, the single track is provided with multiple arc-shaped shallow grooves, each arc-shaped shallow groove corresponding to each of the injection part limiting tracks, and the injection parts on the single track are initially divided by each arc-shaped shallow groove; The width of each arc-shaped shallow groove is less than the outer diameter of the injection part.

[0011] According to one aspect of the invention, the spiral track structure further includes: a plurality of injection molded paddles; Each of the aforementioned injection piece paddles is respectively disposed at the end of the single-sided limiting section near the double-sided limiting section; The working end of each of the injection piece paddles is supported on the limiting baffle and extends out of the limiting baffle above the gap.

[0012] According to one aspect of the present invention, the negative pressure conveying assembly includes: a negative pressure fan and a negative pressure fan pipe; one end of the negative pressure fan pipe is connected to the negative pressure fan, and the other end is disposed on the top of the storage tank; The negative pressure fan draws in the injection component and then transports it to the storage bin through the negative pressure fan pipe.

[0013] According to one aspect of the present invention, a photoelectric sensor for detecting the level of the injection piece is provided on the inner wall of the storage bin, and a gate is provided at the bottom of the storage bin. When the photoelectric sensor detects that the injection piece has reached the level, it gives a detection signal, and the control mechanism controls the gate to open and release the injection piece to the bottom of the climbing section of the lower spiral track structure according to the detection signal.

[0014] According to one aspect of the invention, the vibratory disk drives the helical track structure to perform elliptical micro-vibrations.

[0015] According to one aspect of the invention, one end of the conveying pipe is fitted onto the end of the fully enclosed section, and the conveying pipe is made of a transparent material.

[0016] According to one aspect of the present invention, a feeding and conveying device for injection molding components of a visible cavity composite filter rod includes: a negative pressure conveying assembly for suction of injection molding components provided in an external structure; a storage tank for receiving injection molding components suctioned and conveyed by the negative pressure conveying assembly; a spiral track structure for receiving injection molding components provided by the storage tank, the spiral track structure being arranged vertically and including a climbing section and a distributing section arranged from bottom to top; a vibrating plate supported at the bottom of the spiral track structure for driving the spiral track structure to vibrate, causing the injection molding components on the spiral track structure to spirally climb upward from the bottom climbing section to the distributing section, and continue to climb upward after being divided into multiple paths by the distributing section. During the climbing motion of the distributing section, the single-row arrangement and attitude correction of the injection molding components in each path are completed by the combination of limiting and vibration of each path; and multiple conveying pipes, respectively connected to each spiral track in the spiral track structure, respectively receiving the single-row arranged and attitude-corrected injection molding components conveyed by each spiral track, and transferring the injection molding components to the corresponding receiving pipe of the next device. This setup allows for complete automation from component retrieval, buffering, lifting, and sorting to distribution, significantly reducing labor intensity and reliance on human skill. The spiral track divides the components into multiple paths, simultaneously feeding them to the next process via multiple conveying pipes, greatly improving the overall production line's feeding efficiency and cycle time, and resolving the speed bottleneck issue of single-point feeding. The storage bin acts as a buffer unit, ensuring that even with brief interruptions in upstream feeding, the vibratory feeder and subsequent processes can continuously receive materials, guaranteeing production continuity.

[0017] According to one aspect of the present invention, the climbing section is a single-track structure, which includes a single track and baffles disposed on the side of the single track. All injection pieces move upward through the single track, and the baffles limit all injection pieces on the single track. Because the injection pieces released from the storage bin are initially loose, disordered, or even piled up, the single-track structure allows all injection pieces to move upward along a single path. The side baffles prevent the injection pieces from falling off the side during the vibration climbing process, and all injection pieces are collected and initially organized into a continuous material flow with the same direction. All injection pieces share the same upward channel, avoiding the uneven material supply problem that may exist in the initial section of multiple tracks (some tracks are empty, and some tracks are congested). The vibration energy is concentrated on one track, making the climbing drive more efficient and stable, and ensuring a continuous and abundant material flow from the storage bin to the distribution section.

[0018] According to one aspect of the present invention, the material distribution section includes: multiple injection molding limiting tracks; each injection molding limiting track is arranged at intervals through hollowed-out gaps, the width of which is greater than the outer diameter of the injection molding; the width of each injection molding limiting track is greater than the outer diameter of a single injection molding and less than twice the outer diameter of a single injection molding; each injection molding limiting track includes a single-sided limiting section and a double-sided limiting section connected in sequence; the single-sided limiting section is close to the single track structure, and the double-sided limiting section is close to the conveying pipe; a limiting baffle is provided on one side of the single-sided limiting section; limiting baffles are provided on both sides of the double-sided limiting section; the height of the limiting baffle is greater than the outer diameter of the injection molding. This design ensures that only correctly oriented and sized components remain stably on the respective component-limiting tracks during the vibration-climbing process. Any sideways, tilted, or stacked components will fall through the gaps into the lower single-track structure due to instability and have to climb again. The precise width of each component-limiting track ensures that individual components can pass smoothly on the track while preventing two components from getting stuck side-by-side or overlapping at both ends. This guarantees that after material distribution, each conveying pipe receives a uniformly spaced flow of individual components. At the beginning of the material distribution (i.e., the single-sided limiting section), a limiting baffle is provided on only one side, allowing the irregular side of the component to naturally contact the limiting baffle during vibration-climbing. The plate, guided by the baffles and under the action of vibration, begins to rotate and adjust in the preset direction. After the initial guidance, the injection part enters the double-sided limiting section, where the baffles on both sides form a guide channel to further fine-tune the already roughly correct posture and finally lock it completely. The height of the baffles ensures that the injection part is completely confined within the track to prevent it from jumping out. This design avoids congestion or damage caused by rigidly locking the injection parts with different postures at the entrance. It conforms to the dynamic characteristics of vibration feeding, and the correction process is smooth, natural, and has a high success rate. The above solution integrates the three major functions of diversion, screening, and correction into the same spiral climbing physical space. The structure is compact and does not require the addition of an independent screening machine or a complex correction mechanism.

[0019] According to one aspect of the present invention, each injection component limiting track further includes: a fully enclosed section; the fully enclosed section connects to the double-sided limiting sections, receives the injection component conveyed by the double-sided limiting sections, and performs axially fully enclosed vibration conveying of the injection component; the fully enclosed section is a cylindrical structure, and its outer diameter is smaller than that of the double-sided limiting sections. This configuration ensures that after the guidance of the single-sided limiting section and the shaping by the double-sided limiting sections, the injection component's posture is basically corrected. However, before entering the conveying pipe, there is still a risk of posture deviation at the last moment due to inertia, airflow, or minor vibrations. The cylindrical enclosed structure of the fully enclosed section physically eliminates this possibility, completely enclosing the injection component and depriving it of its degrees of freedom in any direction (especially rolling or tilting), achieving ultimate posture locking. In high-speed, continuous vibration conveying, especially at the cliff where the track connects to the pipe, there is a risk of the injection component flying out due to inertia. The fully enclosed structure forms a safe tunnel-like structure, completely preventing the injection component from bouncing or falling at the junction point. The possibility of misalignment is eliminated, ensuring a 100% handover capture rate. The fully enclosed section is the last section of the vibratory feeder-driven conveyor. The injection piece is still driven forward by vibration inside the cylindrical pipe, but its movement has changed from climbing on an open track to sliding within a restricted pipe. This design allows the injection piece to be safely introduced into the conveying pipe before it is completely separated from the vibration power source, achieving a smooth and impact-free transition from mechanical vibration conveying to possible pneumatic or gravity pipe conveying. Its outer diameter is smaller than that of the double-sided limiting section, allowing the entrance of the fully enclosed section to naturally gather the injection piece from the slightly wider limiting section, playing a guiding and centering role, enabling the injection piece to enter easily and accurately, avoiding possible scratches or jamming at the docking edges.

[0020] According to one aspect of the present invention, a single track is provided with multiple arc-shaped shallow grooves, each corresponding to a specific injection part limiting track. These grooves provide initial routing for the injection parts on the single track. The width of each arc-shaped shallow groove is less than the outer diameter of the injection part. This arrangement ensures that when the injection part flow reaches the distribution port of the distribution section, without these shallow grooves, all injection parts would accumulate at the bifurcation point, relying entirely on collisions and probability to enter different paths, easily causing blockages and chaos. In this embodiment, the multiple arc-shaped shallow grooves function similarly to pre-drawn guide lines or pre-set tracks. Under vibration, the injection parts naturally slide into the shallow groove that best matches their direction of travel. Each shallow groove corresponds to a formal injection part limiting track, thus achieving orderly pre-distribution. Since the pre-distribution is completed within a continuous, smooth shallow groove, rather than a sudden, hard bifurcation, the trajectory change of the injection part flow is smoother. This significantly reduces mutual collisions, bouncing, and hard scraping with the track edge of the injection parts at the moment of distribution, thereby reducing material jamming. This prevents damage to the injection molded parts. The width of each arc-shaped shallow groove is less than the outer diameter of the injection molded part, ensuring that only injection molded parts in a specific posture (usually a stable posture required by the design, such as lying flat) can have their projected width match the width of the shallow groove, thus allowing them to remain stably within the shallow groove. Injection molded parts in incorrect postures, such as standing on their side or tilting, may not be able to enter the shallow groove or may be extremely unstable after entering due to their excessively large effective width. This is equivalent to adding a preliminary screening checkpoint based on geometry before the formal material sorting and screening, which can lay the foundation for formal correction. Injection molded parts that can stably enter the corresponding shallow groove have already undergone a round of natural optimization and screening of their posture. When these pre-qualified injection molded parts enter the subsequent single / double-sided limiting section for precision correction, the success rate is higher, the required correction range is smaller, and the process is smoother.

[0021] According to one aspect of the present invention, the spiral track structure further includes: multiple injection piece deflectors; each injection piece deflector is respectively disposed at the end of the single-sided limiting section near the double-sided limiting section; the working end of each injection piece deflector is supported on the limiting baffle and extends out of the limiting baffle above the gap. This arrangement allows the injection piece to be in a critical stage from initial guidance to complete shaping at the end of the transition from the single-sided limiting section to the double-sided limiting section. The gap and baffle edge at this point are geometric abrupt change points and high-risk areas for jamming. A very small number of injection pieces may fail to fully enter the track due to accidental vibration or incorrect posture, instead straddling the tracks on both sides of the gap or leaning against the baffle edge. The working end of the injection piece deflector is precisely located above this point, continuously and gently pushing these straddling or hanging pieces away from the dangerous position during vibration, causing them to either fall completely into the correct track or fall out of the gap, thereby actively preventing jamming and completely eliminating injection pieces with abnormal posture.

[0022] According to one aspect of the present invention, a photoelectric sensor for detecting the level of the injection piece is provided on the inner wall of the storage bin, and a gate is provided at the bottom of the storage bin. When the photoelectric sensor detects that the injection piece has reached the level, it gives a detection signal. The control mechanism controls the gate to open and release the injection piece to the bottom of the climbing section of the lower spiral track structure according to the detection signal. In this embodiment, because the feeding rhythm of the negative pressure feeding is usually inconsistent with the optimal processing rhythm of the vibratory feeder, the storage bin acts as a buffer container, allowing the front end to continuously or intermittently feed material when the storage bin is not full. The vibratory feeder takes material from the bottom of the bin according to its own stable rhythm. The control of the photoelectric sensor and the gate realizes on-demand material release, perfectly decoupling the two links, so that they can operate independently in the most efficient way. By setting a reasonable material point, the amount of injection piece released by the gate each time is relatively fixed. This ensures that the material at the inlet of the vibratory feeder is always maintained within an ideal range, neither too much (causing inlet congestion) nor too little (causing insufficient supply). This is an important prerequisite for the stable and efficient operation of the vibratory feeder.

[0023] According to one aspect of the present invention, a vibratory feeder drives a helical track structure to perform elliptical micro-vibration. The direction angle of the elliptical micro-vibration (i.e., the angle between the major axis of the ellipse and the horizontal plane) is configured to match the helix angle of the helical track structure to generate optimal driving force along the tangential direction of the track. This direction angle can be adjusted according to the material, shape, and friction coefficient of the injection part and the track surface to ensure stable conveying of the injection part in the climbing section and effective attitude correction and screening in the sorting section. This setup ensures that in the material distribution section, the injection pieces are guided and corrected by the limiting baffles. The elliptical micro-vibration prevents the injection pieces from being forced through the limiting area. Instead, through continuous, directional micro-movements, the pieces make gentle and frequent contact with the baffles, thus being smoothly and naturally kneaded into the correct posture. Large or disordered vibrations, on the other hand, can cause the injection pieces to violently collide with the baffles, making correction impossible and even causing damage. The slot screening function in the material distribution section relies entirely on vibration. The elliptical micro-vibration allows qualified injection pieces to move forward stably, while injection pieces with abnormal postures produce vibration responses that differ from normal movement (such as larger swaying amplitudes), making them more prone to instability and falling into the gaps. Inappropriate vibration patterns can disrupt this screening mechanism. Micro-vibration ensures that the entire conveying process is gentle. The pre-distribution of injection pieces in the arc-shaped shallow trough and the final conveying in the fully enclosed section both require this smooth drive to avoid jamming, jumping, and surface scratches.

[0024] According to one aspect of the present invention, one end of the conveying pipe is fitted onto the end of the fully enclosed section, and the conveying pipe is made of a transparent material. This arrangement allows for a seamless connection from vibration conveying (actively driven) to pipe conveying (usually passive sliding or pneumatically assisted); the fitting method ensures continuity and airtightness at the interface, and after the component exits from the fully enclosed section, which is the ultimate attitude lock, it directly enters the conveying pipe, completely avoiding attitude deflection, tumbling, or collision that may occur during free fall, perfectly continuing the results of all previous correction and finishing work. Attached Figure Description

[0025] Figure 1 This schematic diagram shows a front view of a feeding and conveying device for injection molded parts for visible cavity composite filter rods according to an embodiment of the present invention. Figure 2 The diagram schematically shows a top view of a feeding and conveying device for injection molding of a visible cavity composite filter rod according to an embodiment of the present invention. Detailed Implementation

[0026] The invention will now be discussed with reference to exemplary embodiments. It should be understood that the described embodiments are merely intended to enable those skilled in the art to better understand and thus implement the invention, and are not intended to imply any limitation on the scope of the invention.

[0027] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment".

[0028] Figure 1 This schematic diagram shows a front view of a feeding and conveying device for injection molded parts for visible cavity composite filter rods according to an embodiment of the present invention. Figure 2 This schematic diagram shows a top view of a feeding and conveying device for injection molded parts with visible cavity composite filter rods according to an embodiment of the present invention. Figure 1 As shown, in this embodiment, the feeding and conveying device for the injection molding of the visible cavity composite filter rod includes: Negative pressure delivery assembly 1, with the injection component provided in the external suction structure; Storage box 2 receives the injection parts sucked and conveyed by negative pressure conveying component 1; The spiral track structure 3 receives the injection parts provided by the storage box 2. The spiral track structure is arranged in a vertical direction and includes a climbing section 6 and a material distribution section 7 arranged from bottom to top. Vibratory plate 4, supported at the bottom of spiral track structure 3, drives spiral track structure 3 to vibrate, causing the injection part on spiral track structure 3 to spirally climb from the bottom climbing section to the material distribution section. After the injection part is divided into multiple paths through the material distribution section, it continues to climb towards the top. During the climbing movement in the material distribution section, the single-row arrangement and posture correction of the injection part in each path are completed by combining the limit of each path with vibration. Multiple conveying pipes 5 are respectively connected to the corresponding spiral tracks in the spiral track structure, receiving the finished injection parts that have been sorted and corrected in a single row from each spiral track, and transferring the injection parts to the corresponding receiving pipe of the next device. This setup allows for complete automation from injection part intake, buffering, lifting, sorting to distribution, significantly reducing labor intensity and reliance on human skill. The injection parts are divided into multiple paths by the material distribution sections of the spiral tracks and simultaneously transported to the next process (such as...) via multiple conveying pipes. Figure 1 The intermittent feeding device greatly improves the overall feeding efficiency and cycle time of the production line, and solves the speed bottleneck problem of single-point feeding; the storage box, as a buffer unit, ensures that even if there is a short interruption in the front-end feeding, the vibratory feeder and subsequent processes can continue to obtain materials, thus ensuring the continuity of production.

[0029] In this embodiment, the injection part is cylindrical in shape and has a spiral smoke guide groove on its outer wall.

[0030] Furthermore, according to one embodiment of the present invention, the climbing section 6 is a single-track structure, which includes a single track and baffles disposed on the side of the single track; the upper layer of the spiral single track gradually narrows compared to the lower layer. All injection pieces ascend along a single track, with baffles confining them to the track. Since the injection pieces released from storage bin 2 are initially loose, disordered, or even piled up, the single-track structure ensures all pieces move upwards along a single path. Side baffles prevent pieces from falling during the vibratory ascent, gathering and initially organizing them into a continuous, directional material flow. All pieces share the same ascending channel, avoiding the uneven material supply issues that may exist in the initial stages of multi-track systems (some tracks are empty, others are congested). Vibrational energy is concentrated on a single track, making the ascent drive more efficient and stable, ensuring a continuous and abundant material flow from the storage bin to the distribution section.

[0031] Furthermore, according to one embodiment of the present invention, the material distribution section 7 includes: a plurality of injection molding limiting tracks 8; Each injection part limiting track 8 is arranged at intervals through hollowed-out gaps 9, and the width of the gaps 9 is greater than the outer diameter of the injection part; The width of each injection molding part limiting track 8 is greater than the outer diameter of a single injection molding part but less than twice the outer diameter of a single injection molding part; Each injection component limiting track 8 includes a single-sided limiting section and a double-sided limiting section connected in sequence; The single-sided limiting section is close to the single-track structure, and the double-sided limiting section is close to the conveying pipeline 5; A limiting baffle 16 is provided on one side of the single-sided limiting section; Both sides of the double-sided limiting section are provided with limiting baffles 16; The height of the limiting baffle is greater than the outer diameter of the injection piece. This design ensures that during the vibration climbing process, only injection pieces with correct posture and qualified dimensions can stably remain on the respective injection piece limiting tracks 8. Any sideways, tilted, or stacked injection pieces will fall from the gap 9 into the lower single-track structure due to instability and have to climb again. The precise setting of the width of each injection piece limiting track 8 ensures that a single injection piece can pass smoothly on the track while preventing two injection pieces from being stuck on the track side by side or overlapping at both ends. This ensures that after material distribution, each conveying pipe receives a uniformly spaced flow of single pieces. At the beginning of material distribution (i.e., the single-sided limiting section), a limiting baffle is provided on only one side, so that during the vibration climbing process, the irregular side of the injection piece will naturally contact the limiting baffle. The baffles guide and vibrate the material, causing it to rotate and adjust in a preset direction. After initial guidance, the part enters the double-sided limiting section, where the two baffles form a guide channel to further fine-tune the already roughly correct posture and finally lock it completely. The height of the baffles ensures that the part is completely confined within the track to prevent it from jumping out. This design avoids congestion or damage caused by rigidly locking parts with different postures at the entrance, conforms to the dynamic characteristics of vibration feeding, and the correction process is smooth, natural, and has a high success rate. The above solution integrates the three functions of diversion, screening, and correction into the same spiral climbing physical space, with a compact structure that eliminates the need for additional independent screening machines or complex correction mechanisms.

[0032] Furthermore, according to one embodiment of the present invention, each injection component limiting track 8 further includes: a fully enclosed section (extending into the delivery pipe 5, not shown in the figure); The fully enclosed section connects to the double-sided limiting section, receives the injection part transmitted by the double-sided limiting section, and vibrates and transports the injection part in a fully enclosed axial direction. The fully enclosed section is a cylindrical structure with an outer diameter smaller than that of the double-sided limiting sections. This design ensures that after guidance from the single-sided limiting section and shaping by the double-sided limiting sections, the component's posture is largely corrected. However, before entering the conveying pipe 5, there is still a risk of final posture deviation due to inertia, airflow, or minor vibrations. The cylindrical enclosed structure of the fully enclosed section physically eliminates this possibility. It completely encloses the component, depriving it of any degree of freedom in any direction (especially rolling or tilting), achieving ultimate posture locking. In high-speed, continuous vibration conveying, especially at the abrupt junction where the track meets the pipe, there is a risk of the component flying out due to inertia. The fully enclosed structure forms a safe tunnel-like structure, completely preventing the component from bouncing or falling at the junction point. The possibility of misalignment or drop ensures a 100% handover capture rate. The fully enclosed section is the last section of the vibratory feeder-driven conveyor. The injection piece is still driven forward by vibration inside the cylindrical pipe, but its movement has changed from climbing on an open track to sliding within a restricted pipe. This design allows the injection piece to be safely introduced into the conveying pipeline before it is completely separated from the vibration power source, achieving a smooth and impact-free transition from mechanical vibration conveying to possible pneumatic or gravity pipeline conveying. Its outer diameter is smaller than that of the double-sided limiting section, allowing the entrance of the fully enclosed section to naturally gather the injection piece from the slightly wider limiting section, playing a guiding and centering role, enabling the injection piece to enter easily and accurately, avoiding possible scratches or jamming at the docking edges.

[0033] Furthermore, according to one embodiment of the present invention, a single track is provided with multiple arc-shaped shallow grooves 15, each arc-shaped shallow groove corresponding to each of the aforementioned injection part limiting tracks, and the injection parts on the single track are initially divided by each arc-shaped shallow groove; The width of each arc-shaped shallow groove is less than the outer diameter of the injection piece. This design ensures that when the injection piece flow reaches the distribution port of the distribution section 7, without shallow grooves, all injection pieces would accumulate at the branching point, relying entirely on collisions and probability to enter different paths, easily causing blockages and chaos. The multiple arc-shaped shallow grooves in this embodiment function similarly to pre-drawn guide lines or pre-set tracks. Under vibration, the injection piece will naturally slide into the shallow groove that best matches its direction of travel. Each shallow groove corresponds to a formal injection piece limiting track 8, thus achieving orderly pre-distribution. Since the pre-distribution is completed within a continuous, smooth shallow groove, rather than a sudden, hard branching, the trajectory change of the injection piece flow is more gradual. This significantly reduces mutual collisions, bouncing, and hard scraping with the track edge of the injection pieces at the moment of distribution, thereby reducing material jamming. Risks and damage to the injection molded parts; the width of each arc-shaped shallow groove is less than the outer diameter of the injection molded part, which ensures that only injection molded parts in a specific posture (usually a stable posture required by the design, such as lying flat) can have their projected width match the width of the shallow groove, thus remaining stably in the shallow groove. Injection molded parts in incorrect postures such as standing on their side or tilting may not be able to enter the shallow groove or may be extremely unstable after entering due to their excessively large effective width. This is equivalent to adding a preliminary screening checkpoint based on geometry before the formal material sorting and screening, which can lay the foundation for formal correction. The injection molded parts that can stably enter the corresponding shallow groove have already undergone a round of natural optimization and screening of their posture. When these pre-qualified injection molded parts enter the subsequent single / double-sided limiting section for precision correction, the success rate is higher, the required correction range is smaller, and the process is smoother.

[0034] Furthermore, according to one embodiment of the present invention, the spiral track structure 3 further includes: a plurality of injection molded paddles 10; Each injection component paddle 10 is respectively located at the end of the single-sided limiting section near the double-sided limiting section; The working end of each injection piece lever 10 is supported on the limiting baffle and extends above the gap 9. This arrangement ensures that at the end of the transition from the single-sided limiting section to the double-sided limiting section, the injection piece is in a critical stage from initial guidance to complete shaping. The gap and the edge of the baffle at this point are geometric abrupt change points and high-risk areas for jamming. A very small number of injection pieces may fail to fully enter the track due to accidental vibration or incorrect posture, instead straddling the tracks on both sides of the gap or leaning against the edge of the baffle. The working end of the injection piece lever is located precisely above this point, and can continuously and gently push these straddling or hanging parts away from the dangerous position during vibration, so that they either fall completely into the correct track or fall out of the gap, thereby actively preventing jamming and completely eliminating injection pieces with abnormal posture.

[0035] Furthermore, according to one embodiment of the present invention, the negative pressure conveying assembly 1 includes: a negative pressure fan 11 and a negative pressure fan pipe 12; one end of the negative pressure fan pipe 12 is connected to the negative pressure fan 11, and the other end is disposed on the top of the storage box 2; The negative pressure fan 11 picks up the injection parts and then transports them to the storage box 2 through the negative pressure fan pipe 12.

[0036] Furthermore, according to one embodiment of the present invention, a photoelectric sensor 13 for detecting the level of the injection piece is provided on the inner wall of the storage tank 2, and a gate is provided at the bottom of the storage tank 12. When the photoelectric sensor 13 detects that the injection piece has reached the level, it gives a detection signal. The control mechanism controls the gate to open and release the injection piece to the bottom of the climbing section of the lower spiral track structure according to the detection signal. In this embodiment, because the feeding rhythm of the negative pressure feeding is usually inconsistent with the optimal processing rhythm of the vibratory feeder, the storage tank, as a buffer container, allows the front end to continuously or intermittently feed material when the storage tank is not full, while the vibratory feeder takes material from the bottom of the tank according to its own stable rhythm. The control of the photoelectric sensor and the gate realizes on-demand material release, perfectly decoupling the two links, so that they can operate independently in the most efficient way. By setting a reasonable material point, the amount of injection piece released by the gate each time is relatively fixed, which ensures that the material at the inlet of the vibratory feeder is always maintained within an ideal range, neither too much (causing inlet congestion) nor too little (causing insufficient supply). This is an important prerequisite for the stable and efficient operation of the vibratory feeder.

[0037] Furthermore, according to one embodiment of the present invention, the vibratory feeder drives the helical track structure to perform elliptical micro-vibration. In this embodiment, the direction angle of the elliptical micro-vibration (i.e., the angle between the major axis of the ellipse and the horizontal plane) is configured to match the helix angle of the helical track structure to generate optimal driving force along the tangential direction of the track; this direction angle can be adjusted according to the material, shape, and friction coefficient of the injection part and the track surface to ensure that the injection part can be stably conveyed in the climbing section and that effective attitude correction and screening can be achieved in the sorting section. This setup ensures that in the material distribution section, the injection pieces are guided and corrected by the limiting baffles. The elliptical micro-vibration prevents the injection pieces from being forced through the limiting area. Instead, through continuous, directional micro-movements, the pieces make gentle and frequent contact with the baffles, thus being smoothly and naturally kneaded into the correct posture. Large or disordered vibrations, on the other hand, can cause the injection pieces to violently collide with the baffles, making correction impossible and even causing damage. The slot screening function in the material distribution section relies entirely on vibration. The elliptical micro-vibration allows qualified injection pieces to move forward stably, while injection pieces with abnormal postures produce vibration responses that differ from normal movement (such as larger swaying amplitudes), making them more prone to instability and falling into the gaps. Inappropriate vibration patterns can disrupt this screening mechanism. Micro-vibration ensures that the entire conveying process is gentle. The pre-distribution of injection pieces in the arc-shaped shallow trough and the final conveying in the fully enclosed section both require this smooth drive to avoid jamming, jumping, and surface scratches.

[0038] Furthermore, according to one embodiment of the present invention, one end of the conveying pipe 5 is fitted onto the end of the fully enclosed section, and the conveying pipe is made of a transparent material. This arrangement allows for a seamless connection from vibration conveying (actively driven) to pipe conveying (usually passive sliding or pneumatically assisted); the fitting method ensures continuity and airtightness at the interface, and after the injection component exits from the fully enclosed section, which is the ultimate attitude lock, it directly enters the conveying pipe, completely avoiding attitude deflection, tumbling, or collision that may occur during free fall, perfectly continuing the results of all previous correction and finishing work.

[0039] Furthermore, such as Figure 1 As shown, the injection molded parts conveyed by the above-mentioned visible cavity composite filter rod injection molded parts feeding and conveying device of the present invention can finally be conveyed through the conveying pipe 5 to Figure 1 The intermittent feeding device 14 shown in the figure then conveys the injection components one by one to fill and install them into the visible cavity composite filter rod for tobacco. The other end of each conveying pipe 5 is connected to the corresponding feed pipe on the intermittent feeding device 14.

[0040] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this application.

[0041] It should be understood that the sequence number of each step in the invention and its embodiments does not absolutely imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

Claims

1. A feeding and conveying device for injection molded parts of visible cavity composite filter rods, characterized in that, include: Negative pressure delivery assembly, providing injection components in the external suction structure; The storage bin receives the injection parts pumped and conveyed by the negative pressure conveying assembly; A spiral track structure receives the filling material provided by the storage bin. The spiral track structure is arranged vertically and includes a climbing section and a distributing section arranged from bottom to top. The vibratory feeder, supported at the bottom of the spiral track structure, drives the spiral track structure to vibrate, causing the injection parts on the spiral track structure to spirally climb from the bottom climbing section to the distribution section. After the injection parts are divided into multiple paths through the distribution section, they continue to climb towards the top. During the climbing motion in the distribution section, the injection parts are sorted and their posture is corrected in each path by limiting and vibrating each path. Multiple conveying pipes are connected to the corresponding spiral tracks in the spiral track structure, respectively receiving the injection components conveyed by each spiral track and transferring the injection components to the corresponding receiving pipe of the next device.

2. The feeding and conveying device for injection molded parts of the visible cavity composite filter rod according to claim 1, characterized in that, The climbing section is a single-track structure, which includes a single track and baffles disposed on the side of the single track; All injection components move upwards along a single track, and are confined on the track by baffles.

3. The feeding and conveying device for injection molded parts of the visible cavity composite filter rod according to claim 2, characterized in that, The material distribution section includes: multiple injection molding component limiting tracks; The limiting tracks of each injection part are arranged at intervals through hollowed-out gaps, the width of which is greater than the outer diameter of the injection part; The width of each of the aforementioned injection molding part limiting tracks is greater than the outer diameter of a single injection molding part and less than twice the outer diameter of a single injection molding part; Each of the aforementioned injection molding component limiting tracks includes a single-sided limiting segment and a double-sided limiting segment connected in sequence; The single-sided limiting section is close to the single track structure, and the double-sided limiting section is close to the conveying pipeline; A limiting baffle is provided on one side of the single-sided limiting section; Both sides of the double-sided limiting section are equipped with limiting baffles; The height of the limit baffle is greater than the outer diameter of the injection part.

4. The feeding and conveying device for injection molded parts of the visible cavity composite filter rod according to claim 3, characterized in that, Each of the aforementioned injection molding component limiting tracks also includes: a fully enclosed section; The fully enclosed section connects to the double-sided limiting section, receives the injection piece transmitted by the double-sided limiting section, and fully encloses and seals the injection piece; The fully enclosed section is a cylindrical structure, and its outer diameter is smaller than that of the double-sided limiting section.

5. The feeding and conveying device for injection molded parts of the visible cavity composite filter rod according to claim 4, characterized in that, One end of the conveying pipe is fitted onto the end of the fully enclosed section, and the conveying pipe is made of a transparent material.

6. The feeding and conveying device for injection molded parts of visible cavity composite filter rods according to claim 3, characterized in that, The single track is provided with multiple arc-shaped shallow grooves, each arc-shaped shallow groove corresponding to the limiting track of each injection part, and the injection parts on the single track are initially divided by each arc-shaped shallow groove; The width of each arc-shaped shallow groove is less than the outer diameter of the injection part.

7. The feeding and conveying device for injection molded parts of visible cavity composite filter rods according to claim 3, characterized in that, The spiral track structure also includes: multiple injection molded paddles; Each of the aforementioned injection piece paddles is respectively disposed at the end of the single-sided limiting section near the double-sided limiting section; The working end of each of the injection piece paddles is supported on the limiting baffle and extends out of the limiting baffle above the gap.

8. The feeding and conveying device for injection molded parts of visible cavity composite filter rods according to claim 1, characterized in that, The negative pressure conveying assembly includes: a negative pressure fan and a negative pressure fan pipe; one end of the negative pressure fan pipe is connected to the negative pressure fan, and the other end is located on the top of the storage box; The negative pressure fan draws in the injection component and then transports it to the storage bin through the negative pressure fan pipe.

9. The feeding and conveying device for injection molded parts of visible cavity composite filter rods according to claim 1, characterized in that, The inner wall of the storage box is equipped with a photoelectric sensor for detecting the level of the injection piece. The bottom of the storage box is equipped with a gate. When the photoelectric sensor detects that the injection piece has reached the level, it gives a detection signal. The control mechanism controls the gate to open and release the injection piece to the bottom of the climbing section of the spiral track structure below according to the detection signal.

10. The feeding and conveying device for injection molded parts of visible cavity composite filter rods according to any one of claims 1-9, characterized in that, The vibratory plate drives the spiral track structure to perform elliptical micro-vibrations.

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