Paper cutting wheel of cigarette making machine and cigarette making machine

Abstract

The utility model belongs to the technical field of cigarette making machines, and discloses a paper cutting wheel of a cigarette making machine and the cigarette making machine. The paper cutting wheel of the cigarette making machine comprises a wheel body and a plurality of inserts, the inserts are fixed to the outer surface of the wheel body at equal intervals in the circumferential direction, and abutting faces are arranged at the front ends of the inserts and used for abutting against cigarette groups; two step grooves are oppositely formed in the abutting face of the insert and used for being correspondingly connected with two cigarette strips of a cigarette set in an abutting mode respectively. A plurality of adsorption holes are formed in the insert at intervals and used for adsorbing tipping paper. And when the tipping paper adsorbed on the insert is converged with the cigarette group, the abutting surface abuts against the cigarette group, and the two step grooves correspondingly abut against the two cigarette strips respectively. And through the arrangement of the step groove, the extrusion force on the two cigarette strips can be reduced, and the generation of piercing cigarettes is reduced. The length of the part, extending in the axial direction, of the abutting face between the two step grooves is larger than or equal to the width of the tipping paper, during bonding, the tipping paper cannot be bonded to the cigarette bars located in the step grooves, and the bonding quality and the follow-up rolling and rubbing quality of a cigarette set are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of cigarette making machines, in particular to a paper cutting wheel for a cigarette making machine and a cigarette making machine. Background Art

[0002] During the production process of the PROTOS cigarette-making machine, it is common for cigarettes to contain some tobacco stems due to the high stem content of the tobacco raw materials and incomplete stem removal of some parts of the tobacco feeder. When stem-containing cigarettes are squeezed during production, the tobacco stems will pierce the cigarette paper, resulting in the production of puncture cigarettes. During the filter installation stage of the PROTOS machine, a double filter and two single tobacco rods need to be brought together by a closing wheel to form a cigarette group. In the cigarette group, the two single tobacco rods are placed on both sides of a double filter. After that, one end of the tipping paper is bonded to the brought together cigarette group by a paper cutting wheel. The tipping paper is then rolled under the action of the cigarette rolling wheel and the cigarette rolling plate, completely covering the cigarette group with the tipping paper to form a double-length filter cigarette.

[0003] The gap between the existing paper cutting wheel and the closing wheel is smaller than the diameter of the cigarette group. When the tipping paper from the paper cutting wheel merges with the cigarette group on the closing wheel, one end of the tipping paper is squeezed against the cigarette group to achieve adhesion. In order to ensure the quality of adhesion and the subsequent rolling quality of the cigarette group, the squeezing force needs to be increased. However, if the squeezing force is too strong, the internal space of the cigarette group will become smaller, and the tobacco stems of the cigarette rods will pierce the cigarette paper, resulting in puncture smoke. Therefore, there is an urgent need to provide a paper cutting wheel for cigarette making machines that can reduce the generation of puncture smoke while ensuring the quality of adhesion and the subsequent rolling quality of the cigarette group. Utility Model Content

[0004] The purpose of the utility model is to provide a cigarette making machine paper cutting wheel and cigarette making machine, which can effectively reduce the squeezing of tobacco rods in the cigarette group by the paper cutting wheel and reduce the generation of punctured cigarettes while ensuring the bonding quality and the subsequent rolling quality of the cigarette group.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] In one aspect, a paper cutting wheel for a cigarette making machine is provided, comprising:

[0007] a wheel body configured to rotate on a frame of the cigarette making machine;

[0008] Multiple inserts are fixed on the outer surface of the wheel body at equal intervals in the circumferential direction, and the front end of the insert is provided with an abutment surface, which is used to abut with the cigarette group; the insert is provided with two step grooves at the abutment surface, and the two step grooves are respectively used to abut with the two cigarette rods of the cigarette group; the insert is also provided with multiple adsorption holes at intervals for adsorbing tipping paper; the length of the portion of the abutment surface between the two step grooves extending along the axial direction is greater than or equal to the width of the tipping paper.

[0009] In some possible implementations, the minimum gap between the outer surface of the insert and the bottom of the placement groove of the approaching wheel is A, the depth of the step groove is B, and the diameter of the tobacco rod is D, and the size relationship between the three is: A+B=D.

[0010] In some possible implementations, the step groove has a depth of 1.5 mm, and a circumferentially extending length of the step groove is 4 mm.

[0011] In some possible implementations, a guiding slope is provided at the junction of a portion of the abutting surface between two step grooves and the step groove.

[0012] In some possible embodiments, among the multiple adsorption holes, at least two of the adsorption holes are divided into a group, and the multiple groups of adsorption holes are distributed at intervals along the circumference of the insert, and the distance between two adjacent groups of adsorption holes gradually decreases from the front end of the insert to the rear end of the insert.

[0013] In some possible implementations, the insert is provided with a plurality of connection holes, the wheel body is correspondingly provided with a plurality of internal threaded holes, and the cigarette making machine paper cutting wheel further includes screws, which pass through the connection holes and are threadedly connected to the internal threaded holes.

[0014] In some possible implementations, a countersunk hole is provided at the entrance of the connecting hole.

[0015] In some possible implementations, an air inlet is provided on the end surface of the wheel body, the air inlet is used to allow gas to enter, and the adsorption hole is connected to the air inlet.

[0016] In some possible implementations, the insert is provided with a positioning groove, and the wheel body is correspondingly provided with a positioning pin, and the positioning pin is engaged with the positioning groove.

[0017] On the other hand, a cigarette making machine is provided, comprising a frame, a closing wheel and a cigarette making machine paper cutting wheel as described in any of the above schemes, wherein the closing wheel is rotatably arranged on the frame, and the wheel body is rotatably arranged on the frame in a direction opposite to the rotation direction of the closing wheel; the closing wheel is used to axially close two cigarette rods and a double filter to form a cigarette group, when the kraft paper adsorbed on the insert merges with the cigarette group, the abutting surface of the insert can abut against the cigarette group, and the two step grooves can respectively abut against the two cigarette rods of the cigarette group.

[0018] Beneficial effects of the utility model:

[0019] The present invention provides a paper cutting wheel for a cigarette making machine, comprising a wheel body and a plurality of inserts, wherein the wheel body is configured to be rotatably mounted on a frame of the cigarette making machine, and the plurality of inserts are fixed to the outer surface of the wheel body at equal intervals in the circumferential direction. When the tipping paper adsorbed on the insert meets the cigarette group, the abutting surface abuts against the cigarette group, and the two step grooves abut against the two cigarette rods respectively. By providing the step grooves, the squeezing force of the paper cutting wheel on the two cigarette rods can be reduced, thereby reducing the occurrence of punctured cigarettes. During bonding, the front end of the tipping paper covers the double filter and the two connections between the double filter and the two single cigarette rods. Since the length of the partial abutting surface between the two step grooves extending axially is greater than or equal to the width of the tipping paper, the tipping paper will not adhere to the cigarette rod located in the step groove, and the problem of loose bonding of the tipping paper will not occur, thereby ensuring the bonding quality and the subsequent rolling quality of the cigarette group. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of the insert involved in the present utility model (showing only the step groove);

[0021] Figure 2 It is a bottom view of the insert involved in the utility model;

[0022] Figure 3 This is a structural schematic diagram of the insert involved in the utility model from another perspective (only the step groove is shown);

[0023] Figure 4 The utility model is a schematic structural diagram of a paper cutting wheel, a cigarette group and a closing wheel of a cigarette making machine.

[0024] In the picture:

[0025] 10. Wheel body; 1. Insert; 2. Abutment surface; 3. Step groove; 4. Adsorption hole; 5. Connection hole; 6. Positioning groove;

[0026] 100, smoke group; 200, approach wheel. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0028] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0031] like Figures 1 to 4As shown, the present invention provides a paper cutting wheel for a cigarette making machine, comprising a wheel body 10 and a plurality of inserts 1. The wheel body 10 is configured to be rotatably mounted on a frame of the cigarette making machine. The plurality of inserts 1 are fixed to the outer surface of the wheel body 10 at equal intervals in the circumferential direction. The front end of the insert 1 is provided with an abutting surface 2, which is used to abut against the cigarette group 100. The insert 1 is provided with two step grooves 3 opposite to each other at the abutting surface 2, and the two step grooves 3 are respectively used to abut against two cigarette rods in the cigarette group 100. In this embodiment, the step grooves 3 are made by filing, which is convenient for processing. In addition, the insert 1 is also provided with a plurality of adsorption holes 4 at intervals for adsorbing tipping paper. The length of the portion of the abutting surface 2 extending axially between the two step grooves 3 is greater than or equal to the width of the tipping paper. When the tipping paper adsorbed on the insert 1 meets the cigarette group 100, the abutting surface 2 abuts against the cigarette group 100, and the two step grooves 3 abut against the two cigarette rods respectively. By providing the stepped groove 3, the squeezing force of the paper cutting wheel on the two cigarette rods can be reduced, thereby reducing the occurrence of punctured cigarettes. During bonding, the front end of the tipping paper covers the double filter and the two connections between the double filter and the two cigarette rods. Since the axial extension of the portion of the abutting surface 2 between the two stepped grooves 3 is greater than or equal to the width of the tipping paper, the tipping paper will not adhere to the cigarette rod located in the stepped groove 3, and the problem of loose tipping paper bonding will not occur, thereby ensuring the bonding quality and the subsequent rolling quality of the cigarette group 100.

[0032] Alternatively, as Figure 4 As shown, the minimum gap between the outer surface of the insert 1 and the bottom of the placement groove of the approaching wheel 200 is A, the depth of the step groove 3 is B, and the diameter of the tobacco rod is D. The relationship between the three is: A + B = D. When the gap between the outer surface of the insert 1 and the bottom of the placement groove of the approaching wheel 200 is at its minimum, the squeezing force on the tobacco rod is maximum. The sum of the minimum gap A and the depth B of the step groove 3 is equal to the diameter D of the tobacco rod. This ensures that when the gap between the outer surface of the insert 1 and the bottom of the placement groove of the approaching wheel 200 is at its minimum, the squeezing force on the tobacco rod by the paper cutting wheel is zero, thereby further reducing the generation of puncture smoke. Optionally, in this embodiment, the depth of the step groove 3 is 1.5 mm, and the circumferential length of the step groove 3 is 4 mm. For a tobacco rod with a diameter of 7.7 mm, the minimum gap between the outer surface of the insert 1 and the bottom of the placement groove of the approaching wheel 200 is 6.2 mm, and the depth of the step groove 3 is 1.5 mm, which can make the extrusion force of the cigarette machine paper cutting wheel on the tobacco rod 0. The length of the step groove 3 extending along the circumferential direction is 4 mm. When the front end of the kraft paper is bonded to the cigarette group 100, the middle position of the cigarette group 100 can basically be squeezed and bonded, and the extrusion and bonding effect is better.

[0033] Optionally, a guide slope is provided at the junction of the partial abutment surface 2 between the two step grooves 3 and the step groove 3. The front end of the tipping paper covers the double filter and the two connections between the double filter and the two cigarette rods. The cigarette rods are bent at the junction of the partial abutment surface 2 between the two step grooves 3 and the step groove 3. This arrangement can reduce the degree of bending of the cigarette rods and reduce the generation of puncture smoke.

[0034] Optionally, among the multiple adsorption holes 4, at least two adsorption holes 4 are divided into one group, and the multiple groups of adsorption holes 4 are distributed at intervals along the circumference of the insert 1, and the distance between two adjacent groups of adsorption holes 4 gradually decreases from the front end of the insert 1 to the rear end of the insert 1. Specifically, in the present embodiment, fourteen adsorption holes 4 are divided into one group, and six groups of adsorption holes 4 are distributed at intervals along the circumference of the insert 1. With such an arrangement, when the front end of the tipping paper is bonded to the cigarette group 100, it can be ensured that the rear end of the tipping paper is tightly adsorbed on the insert 1. In other embodiments, the multiple groups of adsorption holes 4 are distributed at equal intervals along the circumference of the insert 1 on the insert 1, so as to achieve adsorption of the tipping paper. In addition, in the present embodiment, the length of the adsorption area formed by the multiple adsorption holes 4 extending axially along the insert 1 is equal to the width of the tipping paper, and the adsorption effect on the tipping paper is better.

[0035] Optionally, the insert 1 is provided with a plurality of connecting holes 5, and the wheel body 10 is correspondingly provided with a plurality of internal threaded holes, and the paper cutting wheel of the cigarette making machine further comprises screws, which pass through the connecting holes 5 and are threadedly connected to the internal threaded holes. With such an arrangement, the insert 1 is firmly fixed. Specifically, the insert 1 is provided with six connecting holes 5, two connecting holes 5 form a group, and each group of connecting holes 5 is distributed at equal intervals along the axial direction of the insert 1. In other embodiments, the outer peripheral surface of the wheel body 10 is concavely provided with a snap-fit ​​groove, and the insert 1 is provided with a protrusion, which is snap-fitted with the snap-fit ​​groove to fix the insert 1 on the wheel body 10. Optionally, in this embodiment, a countersunk hole is provided at the entrance of the connecting hole 5 to avoid interference with the tipping paper.

[0036] Optionally, the end surface of the wheel body 10 is provided with air inlet holes for admitting gas, and the adsorption holes 4 are connected to the air inlet holes. In this embodiment, twelve inserts 1 are fixed to the outer surface of the wheel body 10 at equal intervals along the circumference. There are thirty-six air inlet holes, three inlet holes in a group, and twelve groups of air inlet holes are evenly spaced along the same circumference on the end surface of the wheel body 10. The twelve groups of air inlet holes correspond one-to-one to the twelve inserts 1.

[0037] Optionally, in the present embodiment, the material of the insert 1 is hard alloy with high hardness. In addition, the insert 1 is provided with a positioning groove 6, and the wheel body 10 is correspondingly provided with a positioning pin, which is clamped with the positioning groove 6 to position the installation of the insert 1.

[0038] The present invention also provides a cigarette-making machine, comprising a frame, a drawing-together wheel 200, and a paper-cutting wheel. The drawing-together wheel 200 is rotatably mounted on the frame, and the wheel body 10 is rotatably mounted on the frame in a direction opposite to the rotation of the drawing-together wheel 200. The drawing-together wheel 200 is used to axially draw two tobacco rods and a double filter together to form a cigarette group 100. When the tipping paper adsorbed on the insert 1 meets the cigarette group 100, the abutting surface 2 of the insert 1 can abut against the cigarette group 100, and the two stepped grooves 3 can respectively abut against the two tobacco rods in the cigarette group 100. While ensuring the quality of bonding and subsequent rolling of the cigarette group 100, the cigarette-making machine can effectively reduce the squeezing of the tobacco rods in the cigarette group 100 by the paper-cutting wheel and reduce the generation of punctured cigarettes.

[0039] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A paper cutting wheel for a cigarette making machine, characterized in that: include: A wheel body (10) is configured to be rotatably mounted on a frame of a cigarette making machine; A plurality of inserts (1) are fixed to the outer surface of the wheel body (10) at equal intervals in the circumferential direction; a front end of each insert (1) is provided with an abutting surface (2), and the abutting surface (2) is used to abut against a cigarette group (100); the insert (1) is provided with two step grooves (3) at the abutting surface (2), and the two step grooves (3) are respectively used to abut against two cigarette rods of the cigarette group (100); the insert (1) is also provided with a plurality of adsorption holes (4) at intervals, and is used to adsorb tipping paper; the length of the portion of the abutting surface (2) between the two step grooves (3) extending in the axial direction is greater than or equal to the width of the tipping paper.

2. The paper cutting wheel for cigarette making machine according to claim 1, characterized in that: The minimum gap between the outer surface of the insert (1) and the bottom of the placement groove of the approaching wheel (200) is A, the depth of the step groove (3) is B, and the diameter of the tobacco rod is D. The size relationship between the three is: A+B=D.

3. The paper cutting wheel for cigarette making machine according to claim 2, characterized in that: The depth of the step groove (3) is 1.5 mm, and the length of the step groove (3) extending in the circumferential direction is 4 mm.

4. The paper cutting wheel for cigarette making machine according to claim 1, characterized in that: A guiding slope is provided at the junction of a portion of the abutting surface (2) between the two step grooves (3) and the step groove (3).

5. The paper cutting wheel for cigarette making machine according to claim 1, characterized in that: Among the plurality of adsorption holes (4), at least two of the adsorption holes (4) are grouped together, and the plurality of groups of adsorption holes (4) are spaced apart along the circumference of the insert (1), and the distance between two adjacent groups of adsorption holes (4) gradually decreases from the front end of the insert (1) to the rear end of the insert (1).

6. The paper cutting wheel for cigarette making machine according to any one of claims 1 to 5, characterized in that: The insert (1) is provided with a plurality of connection holes (5), the wheel body (10) is correspondingly provided with a plurality of internal threaded holes, and the cigarette making machine paper cutting wheel further comprises screws, which pass through the connection holes (5) and are threadedly connected to the internal threaded holes.

7. The paper cutting wheel for cigarette making machine according to claim 6, characterized in that: A countersunk hole is provided at the entrance of the connecting hole (5).

8. The paper cutting wheel for cigarette making machine according to any one of claims 1 to 5, characterized in that: An air inlet is provided on the end surface of the wheel body (10), the air inlet being used to allow gas to enter, and the adsorption hole (4) is connected to the air inlet.

9. The paper cutting wheel for cigarette making machine according to any one of claims 1 to 5, characterized in that: The insert (1) is provided with a positioning groove (6), and the wheel body (10) is correspondingly provided with a positioning pin, and the positioning pin is engaged with the positioning groove (6).

10. A cigarette making machine, characterized in that: The invention comprises a frame, a closing wheel (200) and a paper cutting wheel of a cigarette making machine according to any one of claims 1 to 9, wherein the closing wheel (200) is rotatably arranged on the frame, and the wheel body (10) is rotatably arranged on the frame in a direction opposite to the rotation direction of the closing wheel (200); the closing wheel (200) is used to axially close two cigarette rods and a double filter to form a cigarette group (100); when the tipping paper adsorbed on the insert (1) merges with the cigarette group (100), the abutting surface (2) of the insert (1) can abut against the cigarette group (100), and the two step grooves (3) can respectively abut against the two cigarette rods of the cigarette group (100).

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