Method for separating reconstituted tobacco sheet after slitting and separating apparatus therefor

Abstract

The application discloses a method for separating reconstituted tobacco sheets after slitting and a separating device thereof. The method is that qualified tobacco sheets and strip-shaped connected sheets pass through several parallel and self-rotating shaping rollers, so that the qualified tobacco sheets, longitudinal strip-shaped connected sheets and vertical strip-shaped connected sheets fall down from between the adjacent shaping rollers, the horizontal strip-shaped connected sheets are blocked by the shaping rollers and then change postures to be the vertical strip-shaped connected sheets falling vertically; the falling qualified tobacco sheets, longitudinal strip-shaped connected sheets and vertical strip-shaped connected sheets enter a strip-shaped fine roller belt which is composed of a plurality of parallel arranged fine rollers and moves in a horizontal plane perpendicular to the falling direction, the qualified reconstituted tobacco sheets pass through between the fine rollers and then fall into a downstream conveying device; the longitudinal strip-shaped connected sheets are blocked by the strip-shaped fine roller belt and then are laid on one fine roller or a plurality of fine rollers, the separated longitudinal strip-shaped connected sheets and vertical strip-shaped connected sheets are peeled off by a separator arranged at a rotating position of the strip-shaped fine roller belt, and finally the longitudinal strip-shaped connected sheets and vertical strip-shaped connected sheets fall into a collecting box, so that the separation and removal are realized.

Description

Technical Field

[0001] This invention relates to the field of tobacco waste recycling technology, specifically a method and device for separating reconstituted tobacco sheets after slicing. Background Technology

[0002] Reconstituted tobacco sheets are a method of recycling and reusing unusable parts of tobacco leaves during cigarette processing. Using various reconstitution techniques such as papermaking, slurry processing, and rolling, waste materials such as tobacco fragments, stems, tobacco dust, and ash sticks that cannot be effectively utilized in tobacco production are processed into thin sheets resembling re-dried tobacco leaves, which are then used in cigarette production. Reconstituted tobacco sheets are generally first made continuously in a single sheet, dried to a certain moisture content, and then slit into rhomboid or hexagonal shapes. Due to the influence of physical characteristics such as the uniformity of moisture content, thickness uniformity, and tension difference of the entire reconstituted tobacco sheet, as well as the performance of the slitter, a certain amount of reconstituted tobacco sheets cannot be completely slit into shape, resulting in a certain amount of strip-like sheets (these sheets have several main spatial distribution orientations, including horizontal, vertical, and longitudinal). These strips cause adverse effects such as material blockage and uneven distribution in subsequent processing steps, and affect the quality stability of cigarette processing. To ensure the quality of subsequent products, the continuous tobacco sheets must be separated from the slit reconstituted tobacco sheets, collected, and sliced ​​separately.

[0003] Currently, the main method for separating sheet materials is manual sorting, and some companies use vibrating screens, but the separation effect is limited and they are not widely used. This invention addresses the shortcomings of existing technologies by providing a separation method that is stable in performance, simple in structure, low in cost, and easy to retrofit into existing production lines, enabling stable operation in reconstituted tobacco sheet production lines.

[0004] CN201320488906.3 discloses a screening device for removing large pieces of reconstituted tobacco sheets. This novel screening device uses a commonly used conveyor trough as its base. The screening device is installed above the machine body according to the required width and angle, becoming an integral part of the conveyor trough. Normal-sized reconstituted tobacco sheets pass through the screen and enter the finished product outlet via the conveyor trough. Large pieces and continuous sheets adhere to the screen bars and converge at the diversion plate installed at the end of the screen bars, ultimately achieving large piece separation at the large piece outlet. Since continuous sheets generally move in the same direction as the screen bars when entering the screening device, they cannot adhere to the screen bars and cannot achieve effective separation. Furthermore, the vibrating conveyor consumes a large amount of energy and easily generates dust. Summary of the Invention

[0005] The purpose of this invention is to provide a method and apparatus for separating reconstituted tobacco sheets after slitting, in order to address the shortcomings of existing technologies, reduce the continuous sheet rate of reconstituted tobacco sheet products, improve the product qualification rate, and reduce problems such as material blockage and uneven material distribution in subsequent slitting processes.

[0006] To achieve the purpose of this invention, the following technical solution is adopted:

[0007] This invention provides a method for separating reconstituted tobacco sheets after slitting. The reconstituted tobacco sheets, after being slitted by a slitting machine, include qualified reconstituted tobacco sheets and strip-shaped sheets resulting from incomplete cutting. These strip-shaped sheets are categorized into longitudinal strip-shaped sheets, transverse strip-shaped sheets, and vertical strip-shaped sheets based on their direction relative to the shaping roller. The method for separating the qualified tobacco sheets and the strip-shaped sheets includes:

[0008] (I) After being cut, the qualified tobacco sheets and strips fall freely, passing through several parallel and rotating shaping rollers. The distance between each shaping roller is more than 1.5 times the diagonal length of the qualified reconstituted tobacco sheet. The rotation speed of the shaping rollers is adjusted so that the qualified tobacco sheets, longitudinal strips and vertical strips pass through the gaps between adjacent shaping rollers and fall. After being blocked by the shaping rollers, the transverse strips are laid flat on one or more shaping rollers, thus achieving the sorting of transverse strips. As the shaping rollers rotate, the transverse strips move to one side and fall vertically along the gaps between adjacent shaping rollers, or fall vertically after hitting the side wall. The transverse strips change their posture to vertical strips falling vertically, thus completing the reorientation of the transverse strips.

[0009] (II) The qualified reconstituted tobacco sheets, longitudinal strip sheets and vertical strip sheets falling from step (I) enter the fine roller belt, which is composed of multiple fine rollers arranged side by side and moves in a horizontal plane perpendicular to the direction of material falling. While the fine roller belt moves along the horizontal plane, the fine rollers can also rotate freely. The distance between adjacent fine rollers is more than 1.5 times the diagonal length of the qualified reconstituted tobacco sheets. The fine roller belt moves at a speed greater than or equal to the falling speed of the reconstituted tobacco sheets. The falling reconstituted tobacco sheets move vertically relative to the fine roller belt. The qualified reconstituted tobacco sheets pass through the gap between the fine rollers and fall into the downstream conveying equipment. Longitudinal strips are blocked by the thin roller belt and then laid flat on one or more thin rollers. Vertical strips are impacted by the thin rollers, changing their falling posture and either bending and hanging or laying flat on one or more thin rollers, thus separating the longitudinal and vertical strips. The separated longitudinal and vertical strips move to one side with the thin roller belt. At the turning point of the thin roller belt, some fall freely into the collection box, while the parts that are difficult to fall off the thin rollers are separated by a separator. Finally, the longitudinal and vertical strips fall into the collection box, achieving removal and separation.

[0010] The present invention discloses a method for separating reconstituted tobacco sheets after slicing, wherein: the fine roller belt is an annular belt or chain belt, each fine roller rotates freely, the diameter of the fine roller is less than or equal to 10 mm, and the spacing between the fine rollers is more than 1.5 times the diagonal length of the reconstituted tobacco sheet.

[0011] The present invention provides a method for separating reconstituted tobacco sheets after slicing, wherein the qualified reconstituted tobacco sheets are rhomboid or polygonal tobacco sheets.

[0012] The apparatus for implementing the method of separating reconstituted tobacco sheets after slicing according to the present invention includes: a material box, shaping rollers, a fine roller belt, a scraper, a collection box, a conveyor, and a shaping roller motor. The material box is installed directly above the fine roller belt, and the collection box is placed below one side of the fine roller belt. Several parallel shaping rollers are mounted in a plane at the center of the material box. One end of each shaping roller extends out of the material box and is driven to rotate by the shaping roller motor. The fine roller belt includes: a chain, sprockets, a shaft, a sprocket motor, fine rollers, and connecting rods. One chain is mounted between two sprockets to form a conveyor chain. Two conveyor chains are placed parallel to each other. Several connecting rods are evenly fixed between the two chains, and a fine roller is mounted on each connecting rod. The material box rotates freely on the connecting rod. A shaft is installed between the two corresponding sprockets. The shaft is driven by the sprocket motor to make the fine roller belt rotate. The bottom of the material box is directly opposite the sprocket conveying surface composed of two chains and several fine rollers. The conveyor is installed in the space enclosed by four sprockets and two chains and extends out of this space. The conveying direction of the shaping roller is perpendicular to the conveying direction of the fine roller belt, and the conveying direction of the fine roller belt is perpendicular to the conveying method of the conveyor. The rhomboid and hexagonal tobacco sheets and some strip-shaped sheets in the material box fall from between the shaping rollers into the sprocket conveying surface, and then fall from between the fine rollers into the conveyor. Reconstituted tobacco sheets with a diagonal length of more than twice and strip-shaped sheets that are not completely cut fall from between the shaping rollers into the sprocket conveying surface, and then fall from one side of the fine roller belt into the collection box.

[0013] The apparatus for implementing the method of separating reconstituted tobacco sheets after slicing according to the present invention, wherein the spacing between each shaping roller is 1.5 to 2 times the diagonal length of the qualified reconstituted tobacco sheet.

[0014] The apparatus for implementing the method of separating reconstituted tobacco sheets after slicing according to the present invention, wherein the spacing between each fine roller is 1.5 to 2 times the diagonal length of the qualified reconstituted tobacco sheet.

[0015] An apparatus for implementing the method of separating reconstituted tobacco sheets after slicing according to the present invention, wherein: the material box is composed of an inverted cone shape and a straight cylinder shape, and a plurality of shaping rollers are installed at the junction of the inverted cone shape and the straight cylinder shape, and the plurality of shaping rollers are parallel to the sprocket conveying surface.

[0016] An apparatus for implementing the method of separating reconstituted tobacco sheets after slicing according to the present invention, wherein the fine roller has a diameter of 5-10 mm.

[0017] An apparatus for implementing the method of separating reconstituted tobacco sheets after slicing according to the present invention, wherein: the scraper is inclined on one side of the fine roller strip, and the angle between it and the conveying surface of the sprocket is 60° to 75°.

[0018] The reconstituted tobacco sheet separation process after slicing in this invention has the following advantages:

[0019] (1) Simple structure, stable operation, and easy maintenance;

[0020] (2) The separated flakes can be fully utilized after processing, resulting in a high product yield;

[0021] (3) Low operating costs. Attached Figure Description

[0022] Figure 1 This is a front cross-sectional schematic diagram of a reconstituted tobacco sheet slicing and continuous sheet separation device according to the present invention;

[0023] Figure 2 yes Figure 1 A side view diagram.

[0024] exist Figure 1 and Figure 2 In the diagram, number 1 is material bin 1; number 2 is shaping roller; number 3 is chain; number 4 is sprocket; number 5 is rotating shaft; number 6 is sprocket motor; number 7 is fine roller; number 8 is scraper; number 9 is collection box; number 10 is conveyor; number 11 is shaping roller motor; and number 12 is connecting rod. Detailed Implementation

[0025] This invention discloses a method for separating reconstituted tobacco sheets after slitting. The reconstituted tobacco sheets, after being slitted by a slitting machine, comprise qualified tobacco sheets and strip-shaped strands resulting from incomplete slitting. The qualified tobacco sheets are rhomboid or polygonal in shape. The strip-shaped strands are categorized into longitudinal strip-shaped strands, transverse strip-shaped strands, and vertical strip-shaped strands based on their direction relative to the shaping roller. The method includes:

[0026] (I) After slitting, qualified tobacco sheets and strip-shaped sheets fall freely, passing through several parallel and rotating shaping rollers. The distance between each shaping roller is more than 1.5 times the diagonal length of the qualified reconstituted tobacco sheet. The rotation speed of the shaping rollers is adjusted so that qualified tobacco sheets, longitudinal strip-shaped sheets and vertical strip-shaped sheets pass through the gaps between adjacent shaping rollers and fall. After being blocked by the shaping rollers, the transverse strip-shaped sheets are laid flat on one or more shaping rollers, thus achieving the sorting of transverse strip-shaped sheets. As the shaping rollers rotate, the transverse strip-shaped sheets move to one side and fall vertically along the gaps between adjacent shaping rollers, or fall vertically after hitting the side wall. The transverse sheets change their posture to vertically falling vertical sheets, thus completing the reorientation of the transverse strip-shaped sheets.

[0027] (II) The qualified tobacco sheets, longitudinal strips, and vertical strips falling from step (I) enter a fine roller belt that moves in a horizontal plane perpendicular to the direction of material falling. This fine roller belt is composed of multiple parallel fine rollers. The fine roller belt is either a ring belt or a chain belt. Each fine roller rotates freely. The diameter of the fine rollers is less than or equal to 10 mm, and the distance between the fine rollers is at least 1.5 times the diagonal length of the reconstituted tobacco sheet. While the fine roller belt moves along the horizontal plane, the fine rollers also rotate freely. The distance between adjacent fine rollers is at least 1.5 times the diagonal length of the qualified reconstituted tobacco sheet. The fine roller belt moves at a speed greater than or equal to the falling speed of the reconstituted tobacco sheet. The falling reconstituted tobacco sheet moves perpendicular to the fine roller belt. In the process, qualified reconstituted tobacco sheets pass through the gaps between the fine rollers and fall into the downstream conveying equipment. The longitudinal strip-shaped sheets are blocked by the fine roller belt and then laid flat on one or more fine rollers. The vertical strip-shaped sheets are impacted by the fine rollers and change their falling posture, bending and hanging or laying flat on one or more fine rollers, thus achieving the separation of the longitudinal and vertical strip-shaped sheets. The separated longitudinal and vertical strip-shaped sheets move to one side with the fine roller belt. At the turning point of the fine roller belt, some fall freely into the collection box, while the parts that are difficult to fall off the fine rollers are separated by the separator. Finally, the longitudinal and vertical strip-shaped sheets fall into the collection box, achieving the removal and separation.

[0028] like Figure 1 and Figure 2 As shown, the apparatus for implementing the method of separating reconstituted tobacco sheets after slicing according to the present invention includes: a material box 1 installed directly above the fine roller belt, a collection box 9 placed below one side of the fine roller belt, and several parallel shaping rollers 2 installed in a plane in the center of the material box 1. One end of each shaping roller 2 extends out of the material box 1 and is driven to rotate by a shaping roller motor 11. The fine roller belt includes: a chain 3, a sprocket 4, a rotating shaft 5, a sprocket motor 6, a fine roller 7, and a connecting rod 12. One chain 3 is installed between two sprockets 4 to form a conveyor chain. The two conveyor chains are placed parallel to each other. Several connecting rods 12 are evenly fixed between the two chains 3. A fine roller 7 is fitted on each connecting rod 12 and rotates freely on the connecting rod 12. A rotating shaft 5 is installed between the two corresponding sprockets 4. The rotating shaft 5 is driven by the sprocket motor 6 to make the fine roller belt rotate. The bottom of the material box 1 is directly opposite the sprocket conveying surface composed of two chains 3 and several fine rollers 7. The conveyor 10 is installed in the space enclosed by four sprockets 4 and two chains 3 and extends out of the space. The shaping roller 2 is perpendicular to the conveying direction of the fine roller belt. The conveying direction of the fine roller belt is perpendicular to the conveying method of the conveyor 10. The rhomboid and hexagonal tobacco sheets and some strip-shaped sheets in the material box 1 fall from between the shaping rollers 2 into the sprocket conveying surface, and then fall from between the fine rollers 7 into the conveyor 10. Reconstituted tobacco sheets with a diagonal length of more than twice and strip-shaped sheets that are not completely cut fall from between the shaping rollers 2 into the sprocket conveying surface, and then fall from one side of the fine roller belt into the collection box 9.

[0029] The spacing between each shaping roller 2 and the spacing between each fine roller 7 are 1.5 to 2 times the diagonal length of the qualified reconstituted tobacco sheet; the diameter of the fine roller 7 is 5-10 mm. The material box 1 is composed of an inverted conical shape and a straight cylindrical shape, with several shaping rollers 2 installed at the junction of the inverted conical and straight cylindrical shapes, and these shaping rollers 2 are parallel to the sprocket conveying surface. The scraper 8 is inclined on one side of the fine roller strip, and the angle between it and the sprocket conveying surface is 60° to 75°.

[0030] The working principle of this invention is as follows: The tobacco sheets and transverse strip-shaped sheets are separated by the flatly arranged shaping rollers 2. The transverse strip-shaped sheets are redirected to vertical strip-shaped sheets by the rollers' rotation. The falling tobacco sheets move perpendicularly to the horizontally moving fine roller belt, passing between the fine rollers 7. The longitudinal strip-shaped sheets are blocked by the fine roller belt and then laid flat on one or more fine rollers. The vertical strip-shaped sheets are impacted by the fine rollers 7 on the belt, changing their posture to bend and hang or lay flat on one or more subsequent fine rollers 7, moving to one side with the belt, thus achieving the separation of the tobacco sheets and the strip-shaped sheets. Finally, the strip-shaped sheets on the belt are separated from the fine roller belt by the scraper 8.

[0031] The above description only discloses specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or modifications that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for separating reconstituted tobacco sheet after slitting, the reconstituted tobacco sheet after being slit by a slitter comprises: The application relates to a method for separating qualified reconstituted tobacco sheets and strip-shaped connected sheets caused by incomplete cutting, and the strip-shaped connected sheets are classified into longitudinal strip-shaped connected sheets, transverse strip-shaped connected sheets and vertical strip-shaped connected sheets according to their directions relative to the shaping rollers. The method steps for separating the qualified reconstituted tobacco sheets and the strip-shaped connected sheets comprise: (1) the cut qualified tobacco sheets and the strip-shaped connected sheets freely fall through a plurality of parallel and self-rotating shaping rollers, the spacing between the shaping rollers is 1.5 to 2 times the diagonal length of the qualified tobacco sheets, the rotating speed of the shaping rollers is adjusted so that the qualified tobacco sheets, the longitudinal strip-shaped connected sheets and the vertical strip-shaped connected sheets pass through the adjacent shaping rollers and fall, the transverse strip-shaped connected sheets are blocked by the shaping rollers and are laid on one or more shaping rollers, thereby realizing the separation of the transverse strip-shaped connected sheets; the transverse strip-shaped connected sheets move to one side along with the self-rotation of the shaping rollers, fall vertically along the gap between the adjacent shaping rollers, or fall vertically after colliding with the side wall, the posture of the transverse strip-shaped connected sheets is changed into the vertical posture of the vertical strip-shaped connected sheets, and the direction of the transverse strip-shaped connected sheets is changed; 2. A method of separating the connected pieces after slitting the reconstituted sheet according to claim 1, characterized in that: (2) the qualified tobacco sheets, the longitudinal strip-shaped connected sheets and the vertical strip-shaped connected sheets falling from step (1) enter a fine roller strip moving in a horizontal plane perpendicular to the falling direction and composed of a plurality of parallel fine rollers, the fine rollers rotate freely along with the movement of the fine roller strip in the horizontal plane, the spacing between the adjacent fine rollers is 1.5 to 2 times the diagonal length of the qualified reconstituted tobacco sheets, the fine roller strip moves at a speed greater than or equal to the falling speed of the reconstituted tobacco sheets, the falling reconstituted tobacco sheets make vertical relative movement relative to the fine roller strip, the qualified reconstituted tobacco sheets pass through the fine rollers and fall into the downstream conveying equipment; the longitudinal strip-shaped connected sheets are blocked by the fine roller strip and are laid on one or more fine rollers, the vertical strip-shaped connected sheets change the falling posture after being impacted by the fine rollers, and are bent and hung or laid on one or more fine rollers, thereby realizing the separation of the longitudinal strip-shaped connected sheets and the vertical strip-shaped connected sheets; the separated longitudinal strip-shaped connected sheets and vertical strip-shaped connected sheets move to one side of the fine roller strip, part of the longitudinal strip-shaped connected sheets and the vertical strip-shaped connected sheets freely fall into the collection box at the turning position of the fine roller strip, and the part of the longitudinal strip-shaped connected sheets and the vertical strip-shaped connected sheets hung on the fine rollers are stripped by the separator, so that the longitudinal strip-shaped connected sheets and the vertical strip-shaped connected sheets fall into the collection box and are separated; the qualified tobacco sheets are rhombic or hexagonal tobacco sheets. The fine roller strip adopts a ring-shaped strip, and each fine roller rotates freely, and the diameter of the fine roller is less than or equal to 10 mm.

3. Apparatus for carrying out the method of separating reconstituted tobacco sheet into individual pieces after slitting the sheet, comprising: The material box (1), the shaping roller (2), the fine roller strip, the scraper (8), the collecting box (9), the conveyor (10) and the shaping roller motor (11), the material box (1) is installed above the fine roller strip, the collecting box (9) is placed below the fine roller strip side, characterized in that: a plurality of parallel shaping rollers (2) are installed in the central plane of the material box (1), one end of each shaping roller (2) extends out of the material box (1) and is driven to rotate by the shaping roller motor (11), the fine roller strip includes: chain (3), sprocket (4), shaft (5), sprocket motor (6), fine roller (7) and connecting rod (12), a chain (3) is installed between two sprockets (4) to form a conveying chain, two conveying chains are placed in parallel alignment, a plurality of connecting rods (12) are evenly fixed between the two chains (3), a fine roller (7) is sleeved on each connecting rod (12), the fine roller (7) freely rotates on the connecting rod (12), a shaft (5) is installed between the corresponding two sprockets (4), the shaft (5) is driven by the sprocket motor (6) to drive the fine roller strip to run, the material box (1) is opposite to the sprocket conveying surface composed of two chains (3) and a plurality of fine rollers (7), the conveyor (10) is installed in the space surrounded by four sprockets (4) and two chains (3) and extends from the space, the shaping roller (2) is perpendicular to the conveying direction of the fine roller strip, the conveying direction of the fine roller strip is perpendicular to the conveying direction of the conveyor (10), the diamond, hexagonal tobacco sheet and part of the strip-shaped connecting pieces in the material box (1) fall between the shaping rollers (2) into the sprocket conveying surface, the qualified reconstituted tobacco sheet falls between the fine rollers (7) into the conveyor (10), and part of the strip-shaped connecting pieces falls from one side of the fine roller strip into the collecting box (9).

4. The apparatus of claim 3, wherein: The material box (1) is composed of an inverted cone and a straight cylinder, and the plurality of shaping rollers (2) are installed at the junction of the inverted cone and the straight cylinder, and the plurality of shaping rollers (2) are parallel to the sprocket conveying surface.

5. The apparatus of claim 4, wherein: The fine roller (7) has a diameter of 5-10 mm.

6. The apparatus of claim 5, wherein: The scraper (8) is inclined on one side of the fine roller strip, and the included angle between the scraper (8) and the sprocket conveying surface is 60° to 75°.

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