Cup opening curling device and paper cup machine

Abstract

The utility model relates to a cup opening curling device which is used in a paper cup machine and comprises a plurality of opening curling dies, the opening curling dies are arranged at intervals in the lateral direction, each opening curling die is provided with a forming concave part, and the forming concave parts are arranged on the opening curling dies. The plurality of edge rolling dies comprise a first edge rolling die positioned at an upstream station and a second edge rolling die positioned at a downstream station; the first driving device drives the plurality of opening rolling dies to do reciprocating motion relative to the cup opening of the paper cup; the second driving device drives the first opening rolling die and the second opening rolling die to rotate along the cup opening, and when the first driving device drives the opening rolling dies to move towards the cup opening, at least part of the cup opening is rolled by the opening rolling dies. According to the cup rim curling device, friction force between the die and paper is reduced, meanwhile, the problems that curled edges are wrinkled and curled rim openings are not uniform are solved, and rapid forming of paper cups is facilitated. In addition, the utility model further relates to a paper cup machine.

Description

Technical Field

[0001] This utility model relates to forming devices in paper cup manufacturing machinery, and specifically to a cup rim curling device for use in a paper cup machine. Furthermore, this utility model also relates to a paper cup machine including such a cup rim curling device. Background Technology

[0002] Currently, both domestic and international standards require disposable cups to be environmentally friendly and biodegradable. Paper cup machines are specialized equipment for producing paper cups, including disposable beverage cups, air-insulated double-walled cups, cold beverage cups, and instant noodle bowls, among other cups for the beverage and food industries.

[0003] From the perspective of paper cup manufacturing process, a paper cup can generally be divided into three parts: cup body, cup bottom, and cup rim. In the manufacturing process of the cup body, the following processes can be carried out in sequence: stacking and conveying cup body sheets (such as PE coated paper), heating of single-sided bonding areas, heating of double-sided bonding areas, shaping of the cup body film, and hot bonding of overlapping sealing edges, etc.

[0004] In the manufacturing process of the cup bottom, the following steps can be performed sequentially: feeding the cup bottom roll paper, punching out the cup bottom circular piece, forming the cup bottom into a bowl shape using a cup bottom stamping mold, and then placing it into the cup body manufacturing station. In the manufacturing process of the cup body and cup bottom rim, the following steps can be performed sequentially: initial shaping of the cup body and cup bottom, local heating of the three-rolled surfaces, bonding the inward rolled surface of the cup body to the outward rolled surface of the cup bottom using a cup bottom rolling mold, sealing the cup body and cup bottom using a cup bottom indentation mold, and then placing it into the cup rim manufacturing station.

[0005] In the process of making cup rim curling / rolling, the following steps can be performed sequentially: applying food-grade white oil to the unrolled area of ​​the cup rim, initial rolling with a first rolling mold, second rolling with a second rolling mold, final rolling with a third rolling mold, and online quality monitoring of the paper cup. Finally, the finished product can be output.

[0006] The rim-forming die is designed as a truncated cone with a concave arc at the cup rim. If it only moves horizontally towards the rim, it will directly press the rim, limiting the degree of curling. Furthermore, during this process, relatively soft paper is easily twisted, deformed, or damaged.

[0007] Existing technology has designed a ring of wool felt at the contact point between the rolling die and the cup rim, ensuring it is always moistened with food-grade white oil. This allows the cup rim to be lubricated by the white oil before being formed by concave extrusion, reducing friction between the die and the paper, facilitating forming, and solving the problems of wrinkling and uneven edges. However, because the rolling die only performs translational stamping, the edge curling often doesn't achieve a perfectly round shape, and may still cause paper distortion or damage.

[0008] Therefore, there is an urgent need to provide an improved cup rim curling device that can overcome one or more of the disadvantages of the prior art. Utility Model Content

[0009] In view of the above-mentioned problems of the prior art, the purpose of this utility model is to provide an improved cup rim curling device, which can be used for the curling operation of the rim of a paper cup, improve the curling effect, and avoid or at least partially reduce the twisting and deformation or damage of the paper.

[0010] According to one aspect of the present invention, a cup rim curling device is provided, which can be used in a paper cup machine. The cup rim curling device may include: a plurality of rim curling dies arranged laterally spaced from each other, and each of the plurality of rim curling dies being provided with a forming recess, wherein the plurality of rim curling dies includes a first rim curling die positioned at an upstream station and a second rim curling die positioned at a downstream station of the first rim curling die; a first driving device that drives the plurality of rim curling dies to reciprocate in the axial direction relative to the rim of the paper cup; and a second driving device that drives the first rim curling die and the second rim curling die to rotate circumferentially along the rim of the cup, wherein as the first driving device drives the plurality of rim curling dies to move toward the rim of the cup, the rim of the cup is at least partially curled by the plurality of rim curling dies.

[0011] This cup rim curling device allows the cup rim to be formed into a curled edge under the action of a rotating curling mold. The concave rotation and extrusion molding reduces the friction between the mold and the paper, making the forming process easier. At the same time, it solves the problems of wrinkling and uneven curling edges, greatly improving the curling degree and making it more conducive to the rapid forming of paper cups.

[0012] According to the above aspects of the present invention, preferably, the second driving device may include: a first driver; a first driving wheel that can be connected to the first driver; and a second driving wheel that can be connected to the first driving wheel via a first belt, wherein the second driving wheel is connected to the first rolling die to drive the first rolling die to rotate.

[0013] This structure allows for power transmission via belt drive and allows for a distributed arrangement of drive wheels, making it easier to install, commission, and maintain the equipment.

[0014] According to the above aspects of the present invention, preferably, the second driving device may further include: a third driving wheel, the third driving wheel being connected to the first driving wheel via a second belt, wherein the third driving wheel is connected to the second rolling die to drive the second rolling die to rotate.

[0015] This arrangement can further improve the problems of wrinkling and unevenness of the rolled edges, and in particular, make the rolled edges as round as possible.

[0016] According to the above aspects of the present invention, preferably, the second driving device may further include: a tensioning wheel that supports and abuts against the second belt, the tensioning wheel being able to extend along the axial direction, such that as the multiple rolling dies are driven by the first driving device to reciprocate along the axial direction, the tensioning wheel is always in contact with the second belt.

[0017] By using this widened tension pulley, it can be ensured that as the second drive wheel moves, the second belt always slides on the tension pulley, thus ensuring that there is always tension to maintain power transmission.

[0018] According to the above aspects of the present invention, in order to avoid interference between the second drive wheel and the third drive wheel, preferably, the second drive wheel and the third drive wheel can be arranged spaced apart along the axial direction, so that the first belt and the second belt do not contact each other.

[0019] According to the above aspects of the present invention, as an alternative example and preferably, the second driving device may further include a third driving wheel connected to the second rolling die, the second driving wheel being connected to the third driving wheel via gear transmission or synchronous belt transmission to drive the third driving wheel to rotate.

[0020] According to the above aspects of the present invention, preferably, the first driving device may include: a second driver; a movable wall panel that can be connected to the second driver to be driven to reciprocate along the axial direction; and a driving sleeve that can be attached to the movable wall panel and carry a plurality of rolling dies, such that the plurality of rolling dies reciprocate along the axial direction.

[0021] This arrangement ensures that multiple rolling dies move synchronously, thereby ensuring a consistent and continuous assembly line production process.

[0022] According to the above aspects of the present invention, preferably, the cup rim curling device may further include: an outer cup body mold, which is positioned on the outer side of the cup body of the paper cup in the circumferential direction; an inner cup body mold, which is positioned on the inner side of the cup body of the paper cup in the circumferential direction and in front of a plurality of rim curling molds in the axial direction; and a cup bottom holding device, which is a vacuum holding device for holding the bottom of the paper cup by a vacuum suction cup.

[0023] This arrangement can stably and reliably hold the paper cup, ensuring that the cup body is not easily deformed during the rim rolling process, and improving the quality of the rim rolling.

[0024] According to the above aspects of the present invention, preferably, the cup rim curling device may further include: an air blowing device, the air blowing device including an air source and a supply channel, the supply channel being connected to the air source and opening at the front of the inner mold of the cup body to allow gas to be supplied to the paper cup.

[0025] After the edge rolling is completed, the mold assembly needs to be removed from the cup rim. Since the rolling mold is constantly rotating, in order to prevent the cup rim and the rolling mold from sticking together, the joint at the mandrel will blow air to the bottom of the cup, thus facilitating demolding.

[0026] According to the above aspects of the present invention, in order to further improve the efficiency and quality of the seam rolling, preferably, the plurality of seam rolling dies may further include a third seam rolling die, which is driven by a second driving device to rotate in the circumferential direction.

[0027] According to another aspect of the present invention, a paper cup machine is provided, which may include a cup rim curling device according to the above aspects.

[0028] The cup rim curling device of this utility model can significantly improve the quality and stability of paper cup rim curling, reduce cost waste, improve the production efficiency of users, and enhance product competitiveness.

[0029] Therefore, the cup-mouth curling device of this utility model can meet the usage requirements, overcome the shortcomings of the prior art, and achieve the intended purpose. Attached Figure Description

[0030] To further describe the cup-mouth curling device according to the present invention clearly, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. In the accompanying drawings:

[0031] Figure 1 This is a schematic flowchart of the cup rim process according to a non-limiting embodiment;

[0032] Figure 2 This is a schematic front view of a paper cup machine according to a non-limiting embodiment of the present invention;

[0033] Figure 3 This is a schematic perspective view of a paper cup machine according to a non-limiting embodiment of the present invention;

[0034] Figure 4 This is a schematic perspective view of a paper cup machine according to a non-limiting embodiment of the present invention, viewed from another direction.

[0035] Figure 5 This is a schematic perspective view of a cup-mouth curling device according to a non-limiting embodiment of the present invention;

[0036] Figure 6 This is a schematic perspective view of the cup-mouth curling device according to a non-limiting embodiment of the present invention, viewed from another direction.

[0037] Figure 7 This is a schematic cross-sectional view of a cup-mouth curling device according to a non-limiting embodiment of the present invention; and

[0038] Figure 8 The image shows a comparison of the seaming effect when the seaming die is not rotating and when the seaming die is rotating.

[0039] The above figures are for illustrative purposes only and are not drawn to scale.

[0040] The reference numerals in the figures are listed in the figures and embodiments:

[0041] 1000 - Paper Cup Machine, including:

[0042] 100-Cup mouth curling device, comprising:

[0043] 10 - Multiple seam dies, including:

[0044] 11A - Forming recess;

[0045] 11 - First volume die;

[0046] 12 - Second volume die;

[0047] 13 - Volume 3 dies;

[0048] 20 – First driving device, comprising:

[0049] 21 – Second drive;

[0050] 22 - Movable wall panels;

[0051] 23 - Drive sleeve;

[0052] 30 – Second drive unit, comprising:

[0053] 31 – First driver;

[0054] 32 – First drive wheel;

[0055] 33 – Second drive wheel;

[0056] 34 - First belt;

[0057] 35 - Third drive wheel;

[0058] 36 - Second belt;

[0059] 37 - Tensioner;

[0060] 40 - Cup body outer mold;

[0061] 50-cup body inner mold;

[0062] 60 - Cup bottom retaining device;

[0063] 70 - An air blowing device, comprising:

[0064] 71 - Gas source;

[0065] 72 – Supply Channel;

[0066] 200 - Paper Cup Spinner, including:

[0067] 300 - Paper cup handling station, including:

[0068] 301 - Insertion station;

[0069] 302 - Wet work area;

[0070] 303 - One roll workstation;

[0071] 304 - Two-roll workstation;

[0072] 305 - Three-roll workstation;

[0073] 306 - Inspection Station;

[0074] 307 - Output Station;

[0075] 400 - Paper cup output channel;

[0076] 2000 - Paper cups, including:

[0077] 2000A - Cup rim;

[0078] 2000B - Cup body;

[0079] 2000C - Cup bottom;

[0080] A – Axial direction;

[0081] C – Circumferential direction. Detailed Implementation

[0082] It should be understood that, unless explicitly stated otherwise, the present invention may employ various alternative orientations and sequences of steps. It should also be understood that the specific devices shown in the drawings and description are merely exemplary embodiments of the inventive concept disclosed and defined herein. Therefore, unless expressly stated otherwise, the specific orientations, directions, or other physical features involved in the various disclosed embodiments should not be considered limiting.

[0083] Figure 1 This is a schematic flowchart of the cup rim process according to a non-limiting embodiment.

[0084] As shown in the figure, a paper cup 2000 typically includes a cup mouth 2000A, a cup body 2000B, and a cup bottom 2000C.

[0085] As an example, the process of using a paper cup machine 1000 to roll the edge of cup 2000A can include the following steps: first, applying food-grade white oil to the unrolled edge of cup 2000A; initial rolling using the first rolling mold; second rolling using the second rolling mold; and final rolling using the third rolling mold. It can be seen that the rim of paper cup 2000 undergoes three independent rolling processes during production, highlighting the importance of edge rolling in the paper cup manufacturing process.

[0086] According to the inventive concept of this utility model, a cup rim curling device 100 is provided, which can be used in a paper cup machine 1000.

[0087] Figure 2 This is a schematic front view of a paper cup machine 1000 according to a non-limiting embodiment of the present invention; and Figure 3 and 4 This is a schematic perspective view of a paper cup machine 1000 according to a non-limiting embodiment of the present invention, viewed from different directions.

[0088] As shown in the figure, the paper cup machine 1000 may include a cup rim curling device 100, a paper cup turntable 200, a paper cup operating station 300, and a paper cup output channel 400, etc.

[0089] The cup rim curling device 100 may include a plurality of rim curling dies for curling or rolling the rim 2000A of the paper cup 2000, and will be described in more detail below with reference to the accompanying drawings.

[0090] The paper cup turntable 200 can carry one or more paper cups 2000, and is used to deliver the paper cups 2000 to the corresponding operating stations by rotating the paper cup turntable 200. Specifically, the paper cup operating station 300 may mainly include: an insertion station 301, a wetting station 302, a one-roll station 303, a two-roll station 304, a three-roll station 305, an inspection station 306, and an output station 307. The output station 307 can be connected to the paper cup output channel 400 to transport the rolled paper cups 2000 to the next process.

[0091] Multiple roll dies 10 may be arranged laterally spaced from each other, and each of the multiple roll dies 10 is provided with a forming recess 10A (see...). Figure 8 ).like Figure 2 As shown, the plurality of rolling dies 10 may include a first rolling die 11 located at an upstream station and a second rolling die 12 located at a downstream station of the first rolling die. The upstream station may be a single-rolling station 303, while the downstream station may be a double-rolling station 304.

[0092] In addition, multiple rolling dies 10 can be a third rolling die 13, which can be positioned at the third rolling station 305 downstream of the second rolling station 304.

[0093] In this way, as the paper cup turntable 200 rotates counterclockwise, the paper cup 2000 can rotate sequentially to the first roll station 303, the second roll station 304, and the third roll station 305 to achieve an independent three-stage edge-rolling process.

[0094] Figure 5 and 6 These are schematic perspective views of the cup-rim curling device 100 according to a non-limiting embodiment of the present invention, viewed from different directions. Figure 7 This is a schematic cross-sectional view of a cup-mouth curling device 100 according to a non-limiting embodiment of the present invention.

[0095] As shown in the figure, the first driving device 20 may mainly include a second driver 21, a movable wall panel 22, and a driving sleeve 23.

[0096] The second actuator 21 can be a linear actuator, such as a pneumatic, hydraulic, or electric motor, to provide driving force. The movable wall plate 22 can be connected to the second actuator 21 to be driven to reciprocate along the axial direction A. The drive sleeve 23 can be attached to the movable wall plate 22 and carry multiple rolling dies 10, causing the multiple rolling dies 10 to reciprocate along the axial direction A, such as... Figure 7 As illustrated in the diagram.

[0097] In this way, the first driving device 20 can drive multiple rim-rolling dies 10 to reciprocate relative to the cup opening 2000A of the paper cup 2000 in the axial direction A, and as the first driving device 20 drives the multiple rim-rolling dies 10 to move toward the cup opening 2000A, the cup opening is at least partially rolled by the multiple rim-rolling dies 10.

[0098] The second driving device 30 can drive the first rolling die 11 and the second rolling die 12 to rotate along the circumferential direction C of the cup mouth 2000A.

[0099] As an example, the second drive unit 30 may mainly include a first driver 31, a first drive wheel 32, a second drive wheel 33, and a third drive wheel 35.

[0100] The first driver 31 may be, for example, a drive motor, the output shaft of which may be connected to the first drive wheel 32. The first drive wheel 32 may be a pulley and may drive the second drive wheel 33 and the third drive wheel 35 via belts respectively.

[0101] Specifically, the second drive wheel 33 can be connected to the first drive wheel 32 via the first belt 34, and the third drive wheel 35 can be connected to the first drive wheel 32 via the second belt 36. The second drive wheel 33 and the third drive wheel 35 can be arranged spaced apart along the axial direction A, so that the first belt 34 and the second belt 36 do not contact each other.

[0102] like Figure 6 As can be seen more clearly, the second drive wheel 33 can be connected to the first rolling die 11 to drive the first rolling die 11 to rotate, while the third drive wheel 35 is connected to the second rolling die 12 to drive the second rolling die 12 to rotate.

[0103] In this way, both the first die 11 and the second die 12 have a rotating function and are driven by the same driver, making the structure more compact and allowing the first die 11 and the second die 12 to rotate at the same speed.

[0104] Additionally, as shown in the figure and in a preferred embodiment, both the first belt 34 and the second belt 36 are V-belts to form a V-belt drive. A crucial point is adjusting to a suitable tension. Therefore, after adjusting the angle of supports such as the motor bracket and ensuring the tension of the first belt 34, the second drive unit 30 may also include a tensioning pulley 37 that supports and abuts against the second belt 36. The tensioning pulley 37 may be a widened tensioning pulley to ensure that as the second die 12 moves, the second belt 36 (V-belt) always slides on the tensioning pulley, maintaining a constant tension for power transmission.

[0105] For example, the tensioner 37 may have a smooth guide surface and extend along the axial direction A, such that as the plurality of rolling dies 10 are driven by the first drive device 20 to reciprocate along the axial direction A, the tensioner 37 is always in contact with the second belt 36.

[0106] The first belt 34 and the second belt 36 are shown as V-shaped belts in the accompanying drawings; however, in alternative embodiments, the first belt 34 and the second belt 36 may also be synchronous belts, etc.

[0107] For example, as an alternative embodiment of belt drive, the second drive wheel 33 can be connected to the third drive wheel 35 via gear drive or synchronous belt drive to drive the third drive wheel 35 to rotate.

[0108] In a preferred embodiment, the third die 13 can also be driven by the first drive device 20 to rotate in the circumferential direction C. In this case, another pulley or gear transmission system can also be provided.

[0109] At this time, the three sets of molds are fixed on the same movable wall plate 22 and make frequent reciprocating motions. The first rolling die 11 and the second rolling die 12 are connected to their respective pulleys and rotate with the rotation of the motor. Therefore, the motion trajectories of the first rolling die 11 and the second rolling die 12 form a compound motion.

[0110] In addition, such as Figure 7As schematically shown, the cup rim curling device 100 may also include an outer cup mold 40, an inner cup mold 50, and a cup bottom holding device 60.

[0111] The outer mold 40 can be positioned along the circumferential direction C on the outside of the cup body 2000B of the paper cup 2000. The inner mold 50 can be positioned along the circumferential direction C on the inside of the cup body 2000B of the paper cup 2000, and positioned in front of the plurality of rim-sealing molds 10 in the axial direction A. The outer mold 40 and the inner mold 50 can each have a circular outline to conform to the shape of the cup body 2000B of the paper cup 2000, thereby holding the paper cup 2000 more firmly without deforming it.

[0112] The cup bottom holding device 60 can be a vacuum holding device used to hold the bottom 2000C of the paper cup 2000 by means of a vacuum suction cup.

[0113] Continue to refer to Figure 7 The cup rim curling device 100 may also include an air blowing device 70. This air blowing device 70 may include an air source 71 and a supply channel 72. The air source 71 may be, for example, a compressed air source or a blower. The supply channel 72 may be connected to the air source 71 and has an opening at the front of the inner mold 50 of the cup body to allow gas to be supplied to the paper cup 2000.

[0114] As an example, the sequence of mold actions for rolling the cup rim 2000A from a straight edge to a rolled edge using the cup rim curling device 100 according to this utility model can be performed as follows:

[0115] First, after the cup bottom 2000C and cup body 2000B are crimped and embossed, they are fixed by the cup bottom holding device 60, for example, with the aid of a vacuum suction cup. The outer surface of the cup body 2000B is positioned inside the outer mold 40. At this time, the cup rim curling device 100 can be located away from the cup rim 2000A, and the multiple curling dies 10 rotate continuously under the drive of the second drive wheel 33 and the third drive wheel 35.

[0116] Next, the cup body 2000B remains stationary, while the drive sleeve 23 of the cup rim curling device 100, together with the movable wall plate 22, is moved by the second driver 21. Under the action of the movable wall plate 22, multiple curling dies 10 move towards the cup rim 2000A, generating a displacement X (e.g., ...). Figure 7 (As shown). At this time, the inner mold 50 and multiple rim-rolling molds 10 can move simultaneously toward the cup opening 2000A. The inner mold 50 is in position first, engaging with the outer mold 40 to position the entire paper cup 2000 in the circumferential direction C, preparing for the next step of rim-rolling and ensuring the concentricity of the paper cup 2000 and the mold assembly. Then, the cup opening 2000A is rolled up by the rotating rim-rolling molds.

[0117] Finally, after the edge curling is completed, the mold assembly needs to be detached from the cup rim 2000A, which can be achieved using the air blowing device 70. For example, compressed gas is supplied to the inside of the cup bottom 2000C via the air source 71 and the supply channel 72. Since at least one of the multiple edge curling dies 10 is always rotating, this prevents the cup rim 2000A from sticking to the curling die, facilitating demolding.

[0118] Figure 8 This shows a comparison of the seaming effect when the seaming die is not rotating and when the seaming die is rotating. For example... Figure 8 As illustrated in the diagram, compared to a structure where the rolling die does not rotate, rotating the rolling die significantly improves the curling degree of the cup rim and achieves a better rounding effect.

[0119] The rim of the 2000A cup underwent three independent edge-rolling processes during manufacturing, demonstrating the significant importance of this rolling technique. Specifically:

[0120] 1. From a technical perspective, this curled design increases the strength of the paper cup, making it less prone to deformation when gripped, thus improving its durability.

[0121] 2. The rolled edge design prevents the paper cup from cracking in the middle during use, ensuring the structural integrity of the paper cup.

[0122] 3. The rolled edge design prevents the paper from cutting your mouth during use, avoiding burns when drinking hot beverages and improving user comfort.

[0123] 4. When collecting and packing paper cups, they are often stacked and bundled together. The rolled edge design makes it easy to remove the cups.

[0124] 5. Extending to the actual use of beverage cups, coffee cups, and instant noodle bowls, the rollable design facilitates the need for lids or sealing films on the cup opening, thus achieving diversified product functions.

[0125] The terms “upstream,” “downstream,” “left,” and “right,” used herein to indicate orientation or direction, and the terms “first,” “second,” etc., used to indicate sequence, are merely to enable those skilled in the art to better understand the concept of the present invention as shown in the preferred embodiments, and are not intended to limit the present invention. Unless otherwise stated, all sequences, orientations, or directions are used only to distinguish one element / component / structure from another, and unless otherwise stated, do not indicate any particular order, sequence of operations, direction, or orientation. For example, in an alternative embodiment, “first die-cutting die” may be “second die-cutting die,” and “first drive device” may instead refer to “second drive device.”

[0126] Additionally, as used herein, the terms “paper cup” or “cup” can refer to various cup-shaped products having a predetermined shape, including but not limited to disposable beverage cups, air-insulated double-walled cups, cold beverage cups, and instant noodle bowls.

[0127] In summary, the cup-mouth curling device 100 according to the embodiments of this utility model overcomes the shortcomings of the prior art and achieves the intended utility model objective.

[0128] While the preferred embodiments of the present invention have been described above, those skilled in the art should recognize that the examples described are merely illustrative and should not be construed as limiting the present invention. Therefore, various modifications and variations can be made to the present invention within the spirit and scope of the claims, and all such modifications and variations will fall within the scope claimed by the present invention.

Claims

1. A cup rim curling device (100) for use in a paper cup machine (1000), characterized in that, The cup-rim curling device (100) includes: A plurality of rolling dies (10) are arranged laterally spaced from each other, and each of the plurality of rolling dies (10) is provided with a forming recess (10A), wherein the plurality of rolling dies (10) includes a first rolling die (11) positioned at an upstream station and a second rolling die (12) positioned at a downstream station of the first rolling die. A first driving device (20) drives the plurality of sealing dies (10) to reciprocate in the axial direction (A) relative to the rim (2000A) of the paper cup (2000); and The second driving device (30) drives the first rolling die (11) and the second rolling die (12) to rotate along the circumferential direction (C) of the cup mouth (2000A). As the first driving device (20) drives the plurality of rolling dies (10) to move toward the cup mouth (2000A), the cup mouth is at least partially rolled by the plurality of rolling dies (10).

2. The cup-mouth curling device (100) according to claim 1, characterized in that, The second drive unit (30) includes: First driver (31); A first drive wheel (32), the first drive wheel being coupled to the first driver (31); and The second drive wheel (33) is connected to the first drive wheel (32) via a first belt (34). The second drive wheel (33) is connected to the first rolling die (11) to drive the first rolling die to rotate.

3. The cup-mouth curling device (100) according to claim 2, characterized in that, The second drive device (30) further includes a third drive wheel (35), which is connected to the first drive wheel (32) via a second belt (36), wherein the third drive wheel (35) is connected to the second rolling die (12) to drive the second rolling die (12) to rotate.

4. The cup-mouth curling device (100) according to claim 3, characterized in that, The second drive device (30) further includes a tensioning wheel (37) that bears against the second belt (36), the tensioning wheel extending along the axial direction (A) such that as the plurality of rolling dies (10) are driven by the first drive device (20) to reciprocate along the axial direction (A), the tensioning wheel (37) is always in contact with the second belt (36).

5. The cup-mouth curling device (100) according to claim 4, characterized in that, The second drive wheel (33) and the third drive wheel (35) are arranged spaced apart along the axial direction (A) such that the first belt (34) and the second belt (36) do not contact each other.

6. The cup-mouth curling device (100) according to claim 3, characterized in that, The second drive device (30) further includes a third drive wheel (35) connected to the second rolling die (12). The second drive wheel (33) is connected to the third drive wheel (35) via gear transmission or synchronous belt transmission to drive the third drive wheel to rotate.

7. The cup-rim curling device (100) according to any one of claims 1-6, characterized in that, The first driving device (20) includes: Second drive (21); A movable wall panel (22), the movable wall panel being coupled to the second driver (21) to be driven to reciprocate along the axial direction (A); and A drive sleeve (23) is attached to the movable wall panel (22) and carries the plurality of rolling dies (10) such that the plurality of rolling dies (10) reciprocate along the axial direction (A).

8. The cup-rim curling device (100) according to any one of claims 1-6, characterized in that, The cup-rim curling device (100) further includes: A cup body outer mold (40) is positioned along the circumferential direction (C) on the outside of the cup body (2000B) of the paper cup (2000); A cup body inner mold (50) is positioned along the circumferential direction (C) inside the cup body (2000B) of the paper cup (2000) and in the axial direction (A) in front of the plurality of rim-sealing molds (10); and A cup bottom holding device (60), which is a vacuum holding device, is used to hold the bottom (2000C) of the paper cup (2000) by means of a vacuum suction cup.

9. The cup-mouth curling device (100) according to claim 8, characterized in that, The cup rim curling device (100) further includes an air blowing device (70), which includes an air source (71) and a supply channel (72), the supply channel being connected to the air source (71) and having an opening at the front of the inner mold (50) of the cup body to allow gas to be supplied to the paper cup (2000).

10. A paper cup machine (1000), characterized in that, The paper cup machine includes a cup rim curling device (100) according to any one of claims 1-9.

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