Cotton piece filling structure

Abstract

The invention discloses a cotton piece filling structure, and belongs to the field of cigarette production equipment, the cotton piece filling structure comprises a mounting rack, an incoming material drum wheel and a feeding drum wheel, the incoming material drum wheel and the feeding drum wheel are both mounted on the mounting rack, and the incoming material drum wheel is arranged above the feeding drum wheel; a shaping wheel disc is arranged below the feeding drum wheel and comprises a shaping cover and a positioning seat; the shaping cover is mounted on the mounting frame through a connecting rod, the shaping cover is located over the positioning seat, a rotating shaft is arranged below the positioning seat, and the shaping cover adjusts the appearance of the cotton piece by adjusting the temperature and the rotating speed of the cotton piece. The fibers are promoted to generate recovery stress through alternate cooling and heating treatment, and ordered and stretched external force guide is provided for the fibers in combination with specific mechanical movement of non-uniform rolling, so that the fluffy structure and the regular form of the fibers are actively recovered.

Description

Technical Field

[0001] This invention belongs to the field of cigarette production equipment, specifically relating to a cotton filling structure. Background Technology

[0002] In the cigarette filter rod production process, cellulose acetate tow (cotton component) undergoes multiple processes from opening and conveying to final shaping. During this process, the cotton component is inevitably and continuously subjected to the combined effects of airflow disturbance, friction from mechanical guides, and its own tension, resulting in gradual compaction and deformation of its fiber network structure. This physical deformation occurring during the conveying stage directly causes a decrease in the porosity and uneven cross-sectional shape within the cotton component, which is a significant cause of quality problems in the final filter rod product.

[0003] Existing technologies focus on preventing or mitigating deformation by optimizing opening, controlling tension, and eliminating static electricity, which is a form of passive protection. However, for structural compaction that has already occurred during the conveying process, existing production lines lack effective online intervention and repair methods, often resulting in some materials failing to meet subsequent process requirements and causing losses. Summary of the Invention

[0004] The purpose of this invention is to provide a cotton filling structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cotton filling structure, including a mounting frame, an infeed drum, and a feeding drum, wherein the infeed drum and the feeding drum are both mounted on the mounting frame, and the infeed drum is positioned above the feeding drum; The feeding drum is provided with a cotton part groove, and the bottom of the cotton part groove is provided with an air hole; The feeding drum is provided with a feeding groove, and the bottom of the feeding groove is provided with a movable air hole; Below the feeding drum is a shaping disc, which includes a shaping cover and a positioning seat; The shaping cover is mounted on the mounting bracket via a connecting rod. The shaping cover is located directly above the positioning seat, and a rotating shaft is provided below the positioning seat. The shaping cover adjusts the shape of the cotton piece by adjusting the temperature and rotation speed of the cotton piece.

[0006] Preferably, the lower end of the vent is connected to an air extraction pipe.

[0007] Preferably, the lower end of the movable vent is provided with a sealing rod, which can control the opening and closing of the movable vent by moving back and forth.

[0008] Preferably, the sealing rod is provided with a through hole, and the lower end of the through hole is connected to the second air extraction pipe.

[0009] Preferably, the cylinder is located on the side of the lowest end of the feeding drum, and the output shaft of the cylinder is directly opposite the side of the sealing rod at the lowest end of the feeding drum. The side of the sealing rod is provided with an extrusion head that is directly opposite the output shaft of the cylinder, and an elastic pad is provided below the extrusion head.

[0010] Preferably, the shaping cover is a 3 / 4 circular cover plate, and a material guide plate is provided above the shaping cover.

[0011] Preferably, the shaping cover includes a pre-cooling cover, a transition cover, and a heating cover. The pre-cooling cover is located at the lower end of the material discharge guide plate and does not obstruct the material discharge port of the material discharge guide plate. The transition cover is located between the pre-cooling cover and the heating cover.

[0012] Preferably, the inner side of the precooling cover is provided with a friction protrusion offset from the edge to the center, and the precooling cover is provided with a cooling structure. The inner side of the heating cover is provided with a friction protrusion that is offset from the center to the edge, and the heating cover is provided with a heating structure.

[0013] Preferably, the positioning seat is conical, and a cotton part positioning groove is provided on the side wall of the positioning seat. The distance between the positioning seat and the shaping cover is set according to the standard diameter of the cotton part. A spring pin is provided on the top of the cotton part positioning groove and installed on the positioning seat.

[0014] Preferably, a limiting ring is provided on the outer side of the positioning seat, and a discharge groove is provided on the limiting ring at the end of the shaping cover.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: This invention utilizes the subtle changes in fiber elasticity at different temperatures, and induces the fiber to generate restorative stress through alternating hot and cold treatment. Combined with specific mechanical motion of non-uniform rolling, it provides the fiber with an external force to guide its orderly stretching, thereby actively restoring its fluffy structure and regular shape. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 for Figure 2 Enlarged view of the structure at point A inside; Figure 4 This is a structural diagram of the shaping wheel; Figure 5 for Figure 4 Enlarged view of the structure at point B inside; Figure 6 This is an exploded view of the feeding drum structure; Figure 7 This is a schematic diagram of the bottom structure of the shaping cover.

[0017] The attached diagram is labeled as follows: 1-Mounting frame; 2-Incoming material drum; 21-Cotton part groove; 22-Air hole; 221-Suction pipe one; 3-Feeding drum; 31-Feeding groove; 32-Movable air hole; 33-Blocking rod; 321-Extrusion head; 34-Cylinder; 322-Suction pipe two; 4-Shaping wheel; 41-Shaping cover; 411-Pre-cooling cover; 412-Transition cover; 413-Heating cover; 414-Friction boss one; 415-Friction boss two; 42-Positioning seat; 421-Cotton part positioning groove; 422-Spring needle; 43-Rotating shaft; 44-Limiting ring; 441-Discharge groove; 5-Discharge guide plate. Detailed Implementation

[0018] The following detailed description of the embodiments, with reference to the accompanying drawings, will further illustrate the specific implementation of the present invention, in order to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of the present invention.

[0019] like Figure 1-7 As shown, the present invention provides a cotton filling structure, including a mounting frame 1, an infeed drum 2 and a feeding drum 3. The infeed drum 2 and the feeding drum 3 are both mounted on the mounting frame 1, and the infeed drum 2 is positioned above the feeding drum 3. The feeding drum 2 is provided with a cotton part groove 21, and the bottom of the cotton part groove 21 is provided with an air hole 22; The feeding drum 3 is provided with a feeding groove 31, and the bottom of the feeding groove 31 is provided with a movable air hole 32; Below the feeding drum 3 is a shaping disc 4, which includes a shaping cover 41 and a positioning seat 42. The shaping cover 41 is mounted on the mounting bracket 1 via a connecting rod. The shaping cover 41 is located directly above the positioning seat 42. A rotating shaft 43 is provided below the positioning seat 42. The shaping cover 41 adjusts the shape of the cotton piece by adjusting the temperature and rotation speed of the cotton piece.

[0020] In this embodiment, the lower end of the air hole 22 is connected to the first suction pipe 221, which provides a continuous negative pressure to the feeding drum 2, achieving stable adsorption. The lower end of the movable air hole 32 is provided with a blocking rod 33, which can control the opening and closing of the movable air hole 32 by moving it back and forth. The blocking rod 32 has a through hole, the lower end of which is connected to the second suction pipe 222. The blocking rod 33 and the second suction pipe 222 provide controllable negative pressure to the feeding drum 3. When the blocking rod 33 moves forward to block the lower end of the movable air hole, the negative pressure is cut off, and the cotton is released; when the blocking rod moves backward, the air path connects to the second suction pipe through its through hole, generating adsorption force.

[0021] In this embodiment, the cylinder 34 is located on the lowest side of the feeding drum 3. The output shaft of the cylinder 34 is directly opposite the side of the sealing rod 32 at the lowest end of the feeding drum 3. The side of the sealing rod 32 is provided with an extrusion head 321 that is directly opposite the output shaft of the cylinder 34. An elastic pad is provided below the extrusion head 321. The cylinder 34 is used as the driving force to give the sealing rod 33 a lateral thrust. At this time, the through hole and the movable air hole 32 are disconnected, and no more suction force is generated. The extrusion head 321 is the direct action member, and the elastic pad buffers the impact force and resets the sealing rod 33.

[0022] In this embodiment, the shaping cover 41 is a 3 / 4 circular cover plate. A material guide plate 5 is provided above the shaping cover 41. During the process of the cotton piece being driven by the positioning seat 42 to roll once, it successively experiences three temperature zones: cooling, room temperature transition, and heating. Cooling causes the fibers to "tighten", and reheating causes the fibers to "soften and stretch". Combined with rolling, it promotes the reconstruction of the internal structure.

[0023] The 3 / 4 circular cover plate covers most of the circumference, forming a guide cavity that allows the cotton piece to complete the main repair process within it.

[0024] In this embodiment, the heating cover 413 has a heating structure, and the pre-cooling cover 411 has a cooling structure. The shaping cover 41 includes a pre-cooling cover 411, a transition cover 412, and a heating cover 413. The pre-cooling cover is located at the lower end of the material guide plate 5 and does not obstruct the material discharge port of the material guide plate 5. The transition cover 412 is located between the pre-cooling cover 411 and the heating cover 413. The pre-cooling cover 411 and the heating cover 413 respectively integrate a cooling element such as a semiconductor cooling chip or a refrigerant channel and a heating element such as a heating rod or a hot air hole to achieve active temperature control of the cotton parts.

[0025] In this embodiment, the inner side of the precooling cover 411 is provided with a friction boss 414 offset from the edge to the center, and the inner side of the heating cover 413 is provided with a friction boss 415 offset from the center to the edge.

[0026] In this embodiment, friction bosses 414 and 415 form a structure for achieving variable-speed rolling. The asymmetrical bosses periodically change the contact position of the cotton component, thereby changing its rotational speed. This variable-speed rolling can more effectively break up and straighten tangled fibers. Friction boss 414, which is offset from the edge to the center, can make the rolling speed of the cotton component go from fast to slow. The initial fast speed can help the cotton component cool down evenly, and the later slow speed can reduce the impact of centrifugal force on the cotton component fibers during rolling. Friction boss 415, which is offset from the center to the edge, can make the rotational speed of the cotton component gradually increase during the heating process. This can coordinate with the heating and drive the internal cotton component fibers to create gaps with the fastest rolling speed.

[0027] In this embodiment, the positioning seat 42 is conical, and a cotton part positioning groove 421 is provided on the side wall of the positioning seat 42. The distance between the positioning seat 42 and the shaping cover 41 is set according to the standard diameter of the cotton part. A spring pin 422 is provided on the top of the cotton part positioning groove 421 and mounted on the positioning seat 42. A limiting ring 44 is provided on the outer side of the positioning seat 42, and a discharge groove 441 is provided on the limiting ring 44 at the end of the shaping cover 41. The conical design of the positioning seat 42 makes the cotton part tend to automatically center when it rolls on it. At the same time, according to the different linear velocities caused by the distance between the beginning and end of the cotton part and the center of the cone, the position design of the friction boss 1 414 and friction boss 2 415 is used to realize the variation of the rolling speed of the cotton part. The spring pin is triggered when the positioning seat 42 rotates to the position of the discharge groove 441. The triggering process can be performed by a photoelectric switch or a touch switch, pushing the cotton part out of the cotton part positioning groove 421 and out of the shaping wheel 4 to enter the next filling station.

[0028] Working principle: Cylindrical cotton parts from the previous process are fed into the cotton part groove 21 of the continuously rotating feeding drum 2. Air holes 22 at the bottom of the groove generate a constant negative pressure through an air extraction pipe 221, firmly adhering and fixing the cotton parts. When the feeding drum 2 carrying the cotton parts rotates to its closest position to the feeding drum 3, the two grooves align. Through precise synchronous control between the drums, the cotton parts are smoothly transferred into the feeding groove 31 of the feeding drum 3 under the action of negative pressure.

[0029] The feeding drum 3 rotates carrying the cotton piece. The movable air hole 32 at the bottom of its groove is connected to the suction pipe 222 through a through hole on the sealing rod 33, maintaining negative pressure to ensure the cotton piece does not fall off during transport. When the feeding drum 3 rotates to its lowest point, the cylinder 34 actuates, its output shaft pushing the extrusion head 321, which in turn pushes the sealing rod 33 forward. This action blocks the connection between the movable air hole 32 and the suction pipe, instantly eliminating the negative pressure. The cylinder's thrust is transmitted through the extrusion head and the elastic pad, cutting off the negative pressure while simultaneously providing a slight lateral thrust to the cotton piece, ensuring it completely detaches from the groove. Under gravity, the detached cotton piece, guided by the dropping guide plate 5, accurately falls into the cotton piece positioning groove 421 of the shaping disc 4, which is waiting below.

[0030] The shaping wheel 4 is activated, causing the cotton piece to begin rotating. The cotton piece first enters the area below the pre-cooling cover 411. Its internal cooling structure evenly cools the cotton piece. Cooling reduces the mobility of the acetate fiber molecular chain segments, causing the fibers to "tighten" and generate inward elastic recovery stress, preparing for subsequent stretching. The friction boss 414 contacts the cotton piece. Because the positioning seat 42 is conical, the linear velocity of the front end of the cotton piece is greater than that of the rear end. Under the combined effect of this speed difference and the boss, the rolling speed of the cotton piece decreases. The initial rapid rolling helps to evenly dissipate heat; the later slow speed reduces the interference of centrifugal force on the internal fiber structure, allowing the cooling and shrinkage effect to be more complete and stable. The cotton piece leaves the pre-cooling zone and briefly runs in a transitional area without active temperature control, allowing the temperature field to tend to be uniform, preparing for the next heating step. The cotton piece then enters the area below the heating cover 413. Its internal heating structure gently heats the cotton piece. Heating softens the fibers and increases their elasticity. Under the shrinkage stress generated by the initial cooling, the fibers are easier to stretch and rearrange. Friction boss 2 (415) contacts the cotton component. Combined with the linear velocity difference of the conical base, the rolling speed of the cotton component gradually increases. This accelerated rolling generates increasingly stronger centrifugal force and internal shear force, which more effectively disperses and combs the fibers, which have become more active due to heating, promoting the regeneration and expansion of internal voids.

[0031] The cotton piece, having completed a full rotation of repair, rotates with the positioning seat 42 to the opening at the end of the shaping cover 41. When the cotton piece positioning groove 421, where the cotton piece is located, rotates to the discharge groove 441, the spring pin 422 mounted on the positioning seat 42 is triggered, its tip extending to gently push the repaired cotton piece out of the cotton piece positioning groove. The pushed-out cotton piece leaves the shaping disc through the discharge groove 441 and falls into the downstream conveying device, ready to enter the final filling process.

[0032] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A cotton filling structure, characterized in that: It includes a mounting frame (1), a feeding drum (2) and a feeding drum (3), both of which are mounted on the mounting frame (1), with the feeding drum (2) positioned above the feeding drum (3); The feeding drum (2) is provided with a cotton part groove (21), and the bottom of the cotton part groove (21) is provided with an air hole (22). The feeding drum (3) is provided with a feeding groove (31), and the bottom of the feeding groove (31) is provided with a movable air hole (32). Below the feeding drum (3) is a shaping disc (4), which includes a shaping cover (41) and a positioning seat (42). The shaping cover (41) is mounted on the mounting bracket (1) via a connecting rod. The shaping cover (41) is located directly above the positioning seat (42). A rotating shaft (43) is provided below the positioning seat (42). The shaping cover (41) adjusts the shape of the cotton piece by adjusting the temperature and rotation speed of the cotton piece.

2. The cotton filling structure according to claim 1, characterized in that: The lower end of the vent (22) is connected to the first air extraction pipe (221).

3. The cotton filling structure according to claim 1, characterized in that: The lower end of the movable air hole (32) is provided with a sealing rod (33), which can control the opening and closing of the movable air hole (32) by moving back and forth.

4. The cotton filling structure according to claim 3, characterized in that: The sealing rod (32) is provided with a through hole, and the lower end of the through hole is connected to the second air extraction pipe (322).

5. The cotton filling structure according to claim 1, characterized in that: The cylinder (34) is located on the side of the lowest end of the feeding drum (3). The output shaft of the cylinder (34) is directly opposite the side of the sealing rod (32) at the lowest end of the feeding drum (3). The side of the sealing rod (32) is provided with an extrusion head (321) that is directly opposite to the output shaft of the cylinder (34). An elastic pad is provided below the extrusion head (321).

6. The cotton filling structure according to claim 1, characterized in that: The shaping cover (41) is a 3 / 4 circular cover plate, and a material guide plate (5) is provided above the shaping cover (41).

7. The cotton filling structure according to claim 6, characterized in that: The shaping cover (41) includes a pre-cooling cover (411), a transition cover (412) and a heating cover (413). The pre-cooling cover is located at the lower end of the material guide plate (5) and does not block the material discharge port of the material guide plate (5). The transition cover (412) is located between the pre-cooling cover (411) and the heating cover (413).

8. The cotton filling structure according to claim 7, characterized in that: The inner side of the precooling cover (411) is provided with a friction boss (414) offset from the edge to the center, and the precooling cover (411) is provided with a cooling structure. The inner side of the heating cover (413) is provided with a friction boss (415) offset from the center to the edge, and the heating cover (413) is provided with a heating structure.

9. The cotton filling structure according to claim 1, characterized in that: The positioning seat (42) is conical, and a cotton part positioning groove (421) is provided on the side wall of the positioning seat (42). The distance between the positioning seat (42) and the shaping cover (41) is set according to the standard diameter of the cotton part. A spring needle (422) is installed on the top of the cotton part positioning groove (421) on the positioning seat (42).

10. The cotton filling structure according to claim 1, characterized in that: The positioning seat (42) is provided with a limiting ring (44) on its outer side, and a discharge groove (441) is provided on the limiting ring (44) at the end of the shaping cover (41).

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