A monopartite filter rod particle adding device

Abstract

The application belongs to the technical field of cigarette making machines, and discloses a one-component filter rod particle adding device, which comprises a particle adding device and a tobacco tongue, a water-drop-shaped filament separator is arranged in the cavity of the tobacco tongue, a plurality of up-and-down through holes are uniformly distributed around the edge of a material taking disc, the material taking disc is rotatably and horizontally arranged on a base by being driven by a motor, a bin is arranged above the material taking disc, the bottom of the bin is open and is in contact connection with part of the material taking holes of the material taking disc, a pneumatic conveying pipe is vertically arranged, the bottom of the pneumatic conveying pipe is open and extends into the tobacco tongue behind the filament separator, the pneumatic conveying pipe is divided into two sections, the opening positions of the pipe cavities between the two sections correspond to the material taking holes and are respectively in contact connection with the upper and lower end surfaces of the material taking disc, the top of the pneumatic conveying pipe is connected with a high-pressure air source through a three-way pipe, and the three-way pipe is connected with the pipe cavity of the lower section of the pneumatic conveying pipe through a bypass pipe. The device can meet the cigarette production demand of adding functional particles into filter cores in a specific position in a quantitative and buried manner.

Description

Technical Field

[0001] This invention relates to the field of cigarette machinery technology, and in particular to a device for adding particles to a single filter rod. Background Technology

[0002] To meet the demand for adding adsorption, filtration, and flavoring functions to cigarettes, one common practice in cigarette manufacturing is to add functional particles such as activated carbon and flavorings to the filter rod. For example, a traditional single-element activated carbon granule filter rod involves adding activated carbon granules to the annular space between the filter core and the forming paper covering it. The advantage of this method is its simplicity and ease of production. However, its drawbacks are also obvious: the granules cannot be added quantitatively, and they are distributed at the edges. During inhalation, the main stream of smoke flows through the filter core, limiting the contact between the smoke and the granules and preventing them from fully utilizing their function. Furthermore, the filter rod is prone to granule leakage near the lip after receiving a cigarette.

[0003] Patent application CN111280478A discloses a "cavity forming and particle adding device." In its technical solution, during the functional particle adding process, particles are transferred multiple times within a rotating wheel using both negative and positive pressure airflow. Because the rotating wheel is constantly rotating, a complete seal cannot be achieved at the junction of the suction port and the metering port, causing particles to overflow at these junctions. These overflowing particles easily fall into random locations within the fiber bundle, ultimately leading to unstable particle addition and unclean filter rods in the production process.

[0004] Patent application CN217837566U discloses a "particle adding device for a cavity filter rod". The device in this patent application uses gravity to add functional particles to the filter rod. This device is only suitable for situations where a cavity has already been reserved in the filter rod, and is mainly used for adding functional particles between segments of a multi-element filter rod. It is not suitable for adding functional particles to a single-element filter rod where the fiber bundle is continuous. Summary of the Invention

[0005] The purpose of this invention is to provide a single-element filter rod particle adding device to meet the cigarette production requirements of quantitatively embedding functional particles into specific locations of the filter element.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A granule adding device for a single-element filter rod includes a granule adding device and a tobacco tongue. The tobacco tongue has a teardrop-shaped fiber separator inside its cavity. The granule adding device includes a feeding tray, a base, a hopper, and a pneumatic conveying pipe. The feeding tray is a circular disc with several vertically penetrating feeding holes evenly distributed around its edge. The feeding tray is rotatably mounted horizontally on the base by a motor. The hopper is positioned above the feeding tray, with an opening at the bottom that contacts and connects to some of the feeding holes on the feeding tray. The pneumatic conveying pipe is vertically positioned, with an opening at the bottom that extends into the tobacco tongue behind the fiber separator. The pneumatic conveying pipe is divided into upper and lower sections, with the opening of the cavity between the two sections corresponding to the feeding holes and respectively contacting and connecting to the upper and lower end faces of the feeding tray. The top of the pneumatic conveying pipe is connected to a high-pressure air source via a T-junction, and the T-junction is connected to the cavity of the lower section of the pneumatic conveying pipe via a bypass pipe.

[0008] Optionally, the tow separator is fixed inside the cavity of the cigarette tongue by a vertical rod.

[0009] Optionally, the lower section of the air delivery pipe includes an inner sleeve and an outer sleeve. The inner sleeve is fixed at the top, and the outer sleeve is fitted over the lower end of the inner sleeve and locked with screws.

[0010] Optionally, the connection between the outer sleeve and the inner sleeve is provided with an expanded section cavity, and the inner diameter of the expanded section cavity and the bypass pipe are both larger than the inner diameter of the upper and lower sections of the air delivery pipe.

[0011] Optionally, the top surface of the material receiving tray is provided with a suction pipe connected to a negative pressure generating device at the position where the material receiving hole is in an unloaded state.

[0012] Optionally, the bottom end of the suction pipe is closed and has several suction ports close to the top surface of the material receiving tray.

[0013] Optionally, the bottom of the suction tube is provided with bristles.

[0014] The beneficial effects of this invention are:

[0015] The single-element filter rod particle adding device provided by this invention can insert functional particles into the middle position of the filter element, allowing for direct addition of functional particles to the single-element filter rod. The embedded functional particles are concentrated in one position, resulting in a large contact surface with the flue gas, thus better utilizing their performance. This device can be used as an independent unit directly connected to a molding machine, producing filter rods with concentrated and fixed-volume particles stacked at a fixed position on the filter tip, preventing particle overflow. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the uni-element filter rod particle adding device provided by the present invention;

[0018] Figure 2 This is a three-dimensional structural schematic diagram of the unary filter rod particle adding device provided by the present invention;

[0019] Figure 3 This is a cross-sectional view of the material handling tray position in this invention;

[0020] Figure 4 This is a schematic diagram of the structure of the cigarette tongue in this invention.

[0021] In the picture:

[0022] 1. Smoke tongue; 2. Tow separator; 3. Feeding tray; 4. Base; 5. Hopper; 6. Air conveying pipe; 7. Feeding hole; 8. Motor; 9. T-connector; 10. Bypass pipe; 11. Vertical rod; 12. Inner sleeve; 13. Outer sleeve; 14. Screw; 15. Expansion section cavity; 16. Suction pipe; 17. Suction port; 18. Brush bristles. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0024] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0027] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] like Figures 1 to 4As shown, this invention provides a uni-element filter rod particle adding device, including a particle adding device and a tobacco tongue 1. The tobacco tongue 1 has a teardrop-shaped fiber separator 2 inside its cavity. The particle adding device includes a feeding tray 3, a base 4, a hopper 5, and an air delivery pipe 6. The feeding tray 3 is a disc, and several vertically penetrating feeding holes 7 are evenly distributed around its edge. The feeding tray 3 is rotatably and horizontally mounted on the base 4 by a motor 8. The hopper 5 is positioned above the feeding tray 3. The base 4 forms an end-face sealing connection with the bottom surface of the feeding tray 3, at least at the top surface corresponding to the position of the hopper 5. The bottom of the hopper 5 is open and connected to the feeding tray. Part of the material receiving hole 7 is connected to the feed plate 3. When the material receiving hole 7 rotates to the bottom of the hopper 5, the granular material in the hopper 5 will fall into the material receiving hole 7. The air conveying pipe 6 is set vertically. The bottom of the air conveying pipe 6 is open and extends into the tobacco tongue 1 behind the tow separator 2. The air conveying pipe 6 is divided into upper and lower sections. The opening position of the cavity between the two sections corresponds to the material receiving hole 7 and is connected to the upper and lower end faces of the material receiving plate 3 respectively. The top of the air conveying pipe 6 is connected to the high-pressure air source through a three-way pipe 9. The three-way pipe 9 is connected to the cavity of the lower section of the air conveying pipe 6 through a bypass pipe 10. The opening position of the cavity between the two sections is the lower port of the cavity of the upper section of the air conveying pipe 6 and the upper port of the cavity of the lower section of the air conveying pipe 6. The motor 8 can drive the material receiving plate 3 to rotate through belt drive or sprocket drive. The motor 8 can be, but is not limited to, a servo motor or a stepper motor.

[0029] During operation, the tobacco bundle is pneumatically conveyed within the tobacco tongue 1. At the tobacco bundle separator 2, it is dispersed outwards, creating an opening at the top that allows particles to enter the bundle. The feeding disc 3 rotates under the drive of the motor 8, and the feeding hole 7 picks up material from the hopper 5. When it rotates to the position of the pneumatic conveying pipe 6, the upper and lower sections of the pipe are connected, and the particles in the feeding hole 7 are rapidly carried into the tobacco bundle by high-pressure air. The bypass pipe 10, connecting the lower section of the pneumatic conveying pipe 6 to the three-way pipe 9, acts as a connector when the upper and lower sections of the pipe are closed. After the pneumatic conveying pipe 6 is connected via the feeding hole 7, the material can be quickly delivered into the tobacco tongue 1.

[0030] In some embodiments, the tow separator 2 is fixed inside the cavity of the tobacco tongue 1 by a vertical rod 11. An opening for the functional particles to enter is formed just behind the vertical rod 11. The height of the vertical rod 11 is adjustable, and by adjusting the height of the vertical rod 11, the height of the tow separator 2 can be changed to adjust the distribution position of the added particles.

[0031] In some embodiments, the lower section of the air delivery pipe 6 includes an inner sleeve 12 and an outer sleeve 13. The inner sleeve 12 is fixed at the top, and the outer sleeve 13 is fitted over the lower end of the inner sleeve 12 and locked by a screw 14. The lower end opening of the air delivery pipe 6 is located on the outer sleeve 13, and the depth of the air delivery pipe 6 inserted into the tobacco tongue 1 can be adjusted by moving the outer sleeve 13 up and down.

[0032] Optionally, an enlarged section cavity 15 is provided at the connection between the outer sleeve 13 and the inner sleeve 12. The inner diameter of the enlarged section cavity 15 and the bypass pipe 10 are both larger than the inner diameter of the upper and lower sections of the air conveying pipe 6, thereby forming a Venturi effect in the cavity of the air conveying pipe 6, which accelerates the material conveying to the smoke tongue 1 after connection.

[0033] In some embodiments, the top surface of the feeding tray 3 is provided with a suction pipe 16 connected to a negative pressure generating device at the position where the feeding hole 7 is in an unloaded state. The suction pipe 16 suctions dust from the unloaded feeding hole 7, and the negative pressure generating device provides negative pressure suction to the suction pipe 16. The bottom surface of the hopper 5 may be provided with a partition to reduce the ineffective contact area between the granular material and the feeding tray 3, thereby reducing the diameter of the suction pipe 16.

[0034] Optionally, the bottom of the suction pipe 16 is closed and has several suction ports 17 close to the top surface of the material tray 3. The diameter of the suction ports 17 is small, which can generate strong suction and improve the dust collection effect. The bottom of the suction pipe 16 is provided with bristles 18, which can brush up the dust adhering to the surface of the material tray 3. The suction ports 17 of the suction pipe 16 can be made into a nipple shape to get closer to the material tray 3 and improve the dust collection effect.

[0035] The single-element filter rod particle adding device provided by this invention can insert functional particles into the middle position of the filter element, allowing for direct addition of functional particles to the single-element filter rod. The embedded functional particles are concentrated in one position, resulting in a large contact surface with the flue gas, thus better utilizing their performance. This device can be used as an independent unit directly connected to a molding machine, producing filter rods with concentrated and fixed-volume particles stacked at a fixed position on the filter tip, preventing particle overflow.

[0036] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A uni-element filter rod particle adding device, comprising a particle adding device and a tobacco tongue, characterized in that, The cigarette tongue has a teardrop-shaped tow separator inside its cavity. The granule adding device includes a feeding tray, a base, a hopper, and a pneumatic conveying pipe. The feeding tray is a disc with several vertically penetrating feeding holes evenly distributed around its edge. The feeding tray is rotatably mounted horizontally on the base by a motor. The hopper is located above the feeding tray and has an opening at the bottom that contacts and connects with some of the feeding holes on the feeding tray. The pneumatic conveying pipe is vertically arranged and has an opening at the bottom that extends into the cigarette tongue behind the tow separator. The pneumatic conveying pipe is divided into upper and lower sections, with the opening of the pipe cavity between the two sections corresponding to the feeding holes and respectively contacting and connecting with the upper and lower end faces of the feeding tray. The top of the pneumatic conveying pipe is connected to a high-pressure air source through a T-junction, and the T-junction is connected to the lower section of the pneumatic conveying pipe through a bypass pipe.

2. The uni-element filter rod particle adding device according to claim 1, characterized in that, The fiber separator is fixed inside the cavity of the cigarette tongue by a vertical rod.

3. The uni-element filter rod particle adding device according to claim 1, characterized in that, The lower section of the air delivery pipe includes an inner sleeve and an outer sleeve. The inner sleeve is fixed at the top, and the outer sleeve is fitted over the lower end of the inner sleeve and locked with screws.

4. The uni-element filter rod particle adding device according to claim 3, characterized in that, The connection between the outer sleeve and the inner sleeve is provided with an expanded section cavity, and the inner diameter of the expanded section cavity and the bypass pipe are both larger than the inner diameter of the upper and lower sections of the air delivery pipe.

5. The uni-element filter rod particle adding device according to claim 1, characterized in that, The top surface of the material receiving tray is provided with a suction pipe connected to a negative pressure generating device at the position where the material receiving hole is in an unloaded state.

6. The uni-element filter rod particle adding device according to claim 5, characterized in that, The bottom of the suction pipe is closed and has several suction ports close to the top surface of the material receiving tray.

7. The uni-element filter rod particle adding device according to claim 5, characterized in that, The bottom of the suction tube is equipped with bristles.

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