Heat sealing and cutting structure of cup-shaped container packaging production line

Abstract

A heat sealing and cutting structure of a cup-shaped container packaging production line comprises a heat sealing and cutting film device and at least one mold unit, the heat sealing and cutting film device is located above the mold unit, and the heat sealing and cutting structure is characterized in that the mold unit comprises a mold positioning flat plate and at least one mold, the mold positioning flat plate is used for being installed on a conveying mechanism, and the mold is arranged on the top face of the mold positioning flat plate; a through hole communicated with the mold is formed in the part, positioned on the inner side of the mold, of the mold positioning flat plate; the heat sealing and film cutting device comprises a heat sealing lifting mechanism and a film cutting lifting mechanism. As the structures of the heat-sealing film cutting device and the mold unit are improved, the edge of a processed finished film is closer to the edge of an opening of a cup-shaped container, the product quality is effectively improved, the number of the driving devices is only two, the energy utilization rate is high, the number of parts is reasonable, and the production cost is low. And moreover, the number of parts needing to be precisely matched is small, and the equipment cost and the production cost are effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cup container packaging production line's heat seal cutting structure. BACKGROUND

[0002] The cup container packaging production line usually adopts the heat seal and cutting device sleeved together and the mold arranged in the pit to cooperate to realize the vacuumizing and aerating of the cup container, and then the film is heat sealed to the top opening of the cup container and cut off. For example, the Chinese patent document with the authorization announcement number CN 220243652 U and the name "a new type of modified atmosphere packaging machine" discloses a packaging machine which comprises a base, the top of the base is fixedly connected with a rack through a plurality of stand columns, the top of the rack is fixedly connected with an electric cylinder, the output shaft of the electric cylinder is fixedly connected with a flat plate, the bottom of the flat plate is provided with a pressing frame and a heat seal film cutting mechanism, the corresponding place of the top of the base and the pressing frame is slidingly connected with a tray, the top surface of the tray is fixedly provided with a sealing ring, a plurality of molds are fixedly arranged in the tray. The heat seal film cutting mechanism comprises a plurality of mounting plates, the mounting plates correspond to the molds one by one, the bottom of the mounting plate is fixedly connected with a heat seal frame, and the inner side of the heat seal frame is fixedly connected with an electric heating wire, the top of the mounting plate is fixedly connected with a plurality of second guide columns, the outer wall of the second guide column is sleeved with a second spring, the outer side of the mounting plate is sleeved with a cutter, the top of the cutter is fixedly connected with a frame plate, and the top of the frame plate is fixedly connected with the flat plate through a plurality of fixed rods, and the top end of the second guide column is fixedly connected with a second limiting block after penetrating through the flat plate.

[0003] However, the applicant finds that the heat seal cutting structure of the packaging machine with the above structure is composed of the heat seal film cutting mechanism and the tray with a plurality of molds in the grooves (usually a plurality of). In order to facilitate vacuumizing and aerating, the spacing between the grooves of the tray and the molds is usually small, and the heat seal frame of the heat seal cutting structure and the cutter sleeved on the outer side are linked. This structure design makes the designer design the size of the cutter to be obviously larger than the size of the heat seal frame and smaller than the corresponding size of the tray in order to avoid the collision between the cutter and the inner wall of the groove of the tray on the outer side or the heat seal frame on the inner side, which leads to the fact that the edge of the film on the finished product obviously exceeds the edge of the cup container, and the edge quality of the film is poor, which is difficult to meet the demand of people for high-quality packaging of cup containers.

[0004] The Chinese patent document with the authorization publication number CN223341079U uses a lifting drive (usually a cylinder) to drive the lifting frame (and all components thereon) to descend, a second cylinder drives the first support plate to descend, thereby completing the insertion of the elastic compression assembly and the avoidance groove, and the sealing ring at the bottom of the compression block of the elastic compression assembly realizes the sealing of the cup mouth, then the cutter cuts off the film, and finally each first cylinder drives the corresponding heat sealing head to descend to complete heat sealing. The action is very complex (the descending process is divided into three actions, each completed by a different cylinder), each action requires precise control of the corresponding drive device, and the cup lifting also needs the push module (unpublished structure only disclosed action) below to realize. This scheme not only has an avoidance groove, but also a cutter limited by the inner heat sealing head, the outer elastic compression assembly (very complex structure, including compression block, sealing ring, third avoidance hole, etc.), and the heat insulation plate. The action is complex and each component needs precise cooperation, so the structure is very complex, the precision of multiple components cooperating with each other is high, the number of cylinders is very large, the equipment cost is high, a lot of energy is consumed, the processing steps are complex, the work efficiency is low and difficult to improve, and the range of applicable products is small.

[0005] The Chinese patent document with the authorization publication number CN 209617660 U cannot realize vacuumizing, inflating and other processes of the cup because there is no upwardly protruding mold, only holes for hanging cups are provided on the cup holder, and each hole needs to be provided with a slot for downward insertion of the cutter (otherwise the cutter has insufficient descending distance and cannot cut off the film, as can be seen from Figure 2 The structure of each hole is provided with a separate mold plate and spring, which is essentially the same as the structure of the traditional heat sealing and cutting mechanism (without vacuumizing and inflating function), only the spring on the heat sealing head is replaced by a cylinder, and the integrated cutting structure is changed into a cutting unit with the same number of cups. The size of the cutter must be designed to be significantly larger than the size of the heat sealing head and smaller than the outer diameter of the slot, which results in the edge of the film on the finished product being significantly larger than the edge of the cup-shaped container, and the edge of the film being of poor quality, which is difficult to meet the demand of people for high-quality packaging of cup-shaped containers. Practical new type content

[0006] The purpose of the present utility model is to provide a heat sealing and cutting structure for a cup-shaped container packaging production line, which optimizes the structure of the heat sealing and film cutting device and the mold unit, greatly reduces the number of components, and effectively improves the work efficiency and energy utilization. The technical scheme adopted is as follows:

[0007] The heat sealing and cutting structure of a cup container packaging production line comprises a heat sealing and cutting film device and at least one mold unit, the heat sealing and cutting film device is located above the mold unit, and the mold unit comprises a mold positioning flat plate for being mounted to a conveying mechanism, at least one mold, and a through hole in a portion of the mold positioning flat plate located inside the mold and communicating with the mold; the heat sealing and cutting film device comprises a heat sealing lifting mechanism and a film cutting lifting mechanism, the heat sealing lifting mechanism comprises a first driving unit, a plurality of heat sealing heads, a film pressing plate, and a cushion plate, all the heat sealing heads are respectively mounted on the first driving unit, the first driving unit drives the heat sealing heads to lift, the film pressing plate and the cushion plate are respectively and liftably mounted at the bottom of the first driving unit, the film pressing plate is located above the cushion plate, the film pressing plate and the first driving unit are connected through a plurality of first elastic return elements, the cushion plate and the first driving unit are connected through a plurality of second elastic return elements, and a film passing space is formed between the film pressing plate and the cushion plate in an initial state; the film cutting lifting mechanism comprises a second driving unit, a driving frame, a plurality of film cutting rings, and a film cutting ring positioning plate, the second driving unit is mounted on the first driving unit, the driving frame is mounted on a second driving end of the second driving unit, the film cutting ring positioning plate is mounted at the bottom of the driving frame, and each film cutting ring is respectively mounted on the bottom surface of the film cutting ring positioning plate, the film cutting ring positioning plate is arranged between the lifting frame and the film pressing plate.

[0008] In a preferred embodiment, the first driving unit comprises a first driving element, a lifting frame, and a first positioning plate for connecting a support, the first driving element is mounted on the first positioning plate, the lifting frame is mounted on a first driving end of the first driving element, a plurality of vertical connecting rods are mounted at the bottom of the lifting frame, the cushion plate is slidably mounted at the bottom end of all the vertical connecting rods, the film pressing plate is liftably sleeved on all the vertical connecting rods and located above the cushion plate, and all the heat sealing heads are respectively mounted on the lifting frame.

[0009] In a more preferred embodiment, a plurality of guide columns are further mounted at the bottom of the lifting frame, the film pressing plate is slidably arranged on all the guide columns, and a first elastic return element is arranged on each of the guide columns, two ends of the first elastic return element are respectively connected to the lifting frame and the film pressing plate, and a second elastic return element is respectively mounted on each of the vertical connecting rods, two ends of the second elastic return element are respectively abutted against the lifting frame and the cushion plate. When the film is pressed, the first elastic return element drives the film pressing plate to move downward, the film located between the film pressing plate and the cushion plate is pressed onto the cushion plate and tightly pressed, and the space inside is sealed (for vacuumizing, inflating, heat sealing, etc.) to realize the sealing of the space inside (which has the cup container). After the processing is completed, the first elastic return element forces the film pressing plate to keep a distance from the lifting frame, and the second elastic return element forces the cushion plate to keep away from the film pressing plate, so that a gap is kept between the film pressing plate and the cushion plate (for allowing the film to pass). The first driving unit is responsible for the lifting of the lifting frame to realize the pressing and heat sealing. The second driving unit is responsible for driving the film cutting rings to lift to complete the film cutting.

[0010] More preferably, the first elastic return element is a first spring, and the second elastic return element is a second spring.

[0011] More preferably, the number of the mold, the film cutting ring, and the heat sealing head of the single mold unit is the same and one-to-one corresponding, and each film cutting ring is respectively installed on the bottom surface of the film cutting ring positioning plate and sleeved on the outside of the corresponding heat sealing head.

[0012] More preferably, the spacer plate is provided with a plurality of first through holes, the film pressing plate is provided with a plurality of second through holes, the number of the first through holes, the second through holes, and the film cutting ring is the same and one-to-one corresponding, and the film cutting ring passes through the corresponding first through hole and second through hole when the film cutting ring is lifted.

[0013] More preferably, the lifting frame comprises a first top plate, a plurality of vertical lifting rods, a downward pressing main plate, a second positioning plate, a spring plate, and a heat sealing head positioning plate, the first top plate is installed on the first driving end of the first driving unit, the top ends of all the vertical lifting rods are respectively connected to the first top plate, the bottom ends of all the vertical lifting rods are respectively connected to the downward pressing main plate after passing through the first positioning plate downward, the bottom surface of the downward pressing main plate is connected to the second positioning plate through a plurality of first connecting pieces, the bottom surface of the second positioning plate is connected to the spring plate through a plurality of second connecting pieces, the bottom surface of the spring plate is connected to the heat sealing head positioning plate through a plurality of third connecting pieces, and all the heat sealing heads are respectively installed on the heat sealing head positioning plate.

[0014] More preferably, the heat sealing head positioning plate is further respectively provided with a calibration plate on both sides, the calibration plate is provided with at least one calibration groove at the bottom end, and the top surface of the mold positioning plate is provided with a plurality of calibration taper blocks, the number of the calibration taper blocks of the same mold positioning plate and all the calibration grooves is the same and one-to-one corresponding, when the lifting frame is lowered and the two calibration plates respectively contact the top surface of the same mold positioning plate, all the calibration taper blocks of the mold positioning plate are respectively inserted into the corresponding calibration groove.

[0015] More preferably, the heat sealing head is installed on the heat sealing head positioning plate through a heat sealing spring.

[0016] More preferably, the driving frame comprises a second top plate and a plurality of driving rods, the second top plate is installed on the second driving end of the second driving unit, the top ends of all the driving rods are connected to the second top plate, and the bottom ends of all the driving rods are respectively extended downward and connected to the film cutting ring positioning plate after passing through the lifting frame.

[0017] The utility model has the beneficial effects that compared with the prior art, the structure of the heat-seal film cutting device and the mold unit is improved, two driving units are used to drive the film cutting ring, the heat-seal head and the mold unit respectively, the size of the film cutting ring can be designed to be closer to the mold, the edge of the finished product film is closer to the edge of the opening of the cup-shaped container, the quality of the product is effectively improved, the number of driving devices is only two, the energy utilization rate is high, the number of parts is reasonable, the number of parts needing precise cooperation is small, and the cost of the equipment and the production cost are effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structural schematic diagram of an embodiment of the utility model;

[0019] Figure 2 It is Figure 1 The structural schematic diagram of the mold unit of the embodiment shown;

[0020] Figure 3 It is Figure 1 The schematic diagram of the bottom of the heat-seal film cutting device of the embodiment shown;

[0021] Figure 4 It is Figure 1 The structural schematic diagram of the heat-seal lifting mechanism of the embodiment shown;

[0022] Figure 5 It is Figure 4 The schematic diagram of the bottom of the heat-seal film cutting device of the embodiment shown;

[0023] Figure 6 It is Figure 1 The structural schematic diagram of the film cutting lifting mechanism of the embodiment shown;

[0024] Figure 7 It is Figure 1 The structural schematic diagram of the film cutting lifting mechanism of the embodiment shown from another angle. DETAILED DESCRIPTION

[0025] As Figures 1-7As shown, the heat sealing and cutting structure of the cup container packaging production line in one embodiment of the present application comprises a heat sealing and cutting film device 1, at least one mold unit 2, the heat sealing and cutting film device 1 is located above the mold unit 2, the mold unit 2 comprises a mold positioning flat plate 201 for mounting to a conveying mechanism, at least one mold 202, the mold 202 is arranged on the top surface of the mold positioning flat plate 201 and protrudes upward, and the part of the mold positioning flat plate 201 located inside the mold 202 is provided with a through hole in communication with the mold 202; the heat sealing and cutting film device 1 comprises a heat sealing lifting mechanism 101 and a film cutting lifting mechanism 102, the heat sealing lifting mechanism 101 comprises a first driving unit 1011, a plurality of heat sealing heads 1012, a film pressing plate 1013, and a cushion plate 1014, the first driving unit 1011 comprises a first driving piece 10111, a lifting frame 10112, and a first positioning plate 10113 for connecting a support, the first driving piece 10111 is mounted on the first positioning plate 10113, the lifting frame 10112 is mounted on the first driving end 101111 of the first driving piece 10111, a plurality of vertical connecting rods 10115 are mounted at the bottom of the lifting frame 10112, the cushion plate 1014 is slidably mounted at the bottom end of all the vertical connecting rods 10115, the film pressing plate 1013 is slidably sleeved on all the vertical connecting rods 10115 and located above the cushion plate 1014, the film pressing plate 1013 and the cushion plate 1014 have a film passing space in the initial state, and all the heat sealing heads 1012 are respectively mounted on the lifting frame 10112; the film cutting lifting mechanism 102 comprises a second driving unit 1021, a driving frame 1022, a plurality of film cutting rings 1023, and a film cutting ring positioning plate 1024, the second driving unit 1021 is mounted on the lifting frame 10112, the driving frame 1022 is mounted on the second driving end 10211 of the second driving unit 1021, the film cutting ring positioning plate 1024 is mounted at the bottom of the driving frame 1022, and each film cutting ring 1023 is respectively mounted on the bottom surface of the film cutting ring positioning plate 1024; the film cutting ring positioning plate 1024 is arranged between the lifting frame 10112 and the film pressing plate 1013, a plurality of guide columns 10114 are further mounted at the bottom of the lifting frame 10112, the film pressing plate 1013 is slidably arranged on all the guide columns 10114, and a first compression spring 10117 is arranged on each of the guide columns 10114, the two ends of the first compression spring 10117 are respectively connected to the lifting frame 10112 and the film pressing plate 1013, a second compression spring 10116 is respectively mounted on each of the vertical connecting rods 10115, and the two ends of the second compression spring 10116 abut against the lifting frame 10112 and the cushion plate 1014. When pressing the film, the first compression spring 10117 drives the film pressing plate 1013 to move downward, presses the film located between the two (the film pressing plate 1013 and the cushion plate 1014) onto the cushion plate 1014 and tightens the film, thereby sealing the space (which has the cup container) inside to facilitate vacuumizing, inflating, heat sealing, etc.After the processing is completed, the first compression spring 10117 is responsible for forcing the platen 1013 to maintain a distance from the lifting frame 10112, and the second compression spring 10116 is responsible for forcing the pad plate 1014 to pull away from the platen 1013, so as to maintain a gap (allowing the film to pass) between the two. The first drive unit 1011 is responsible for the lifting of the lifting frame 10112, realizing the work of pressing, heat sealing, etc. The second drive unit 1021 is responsible for driving the film cutting ring 1023 to lift, completing the work of cutting the film.

[0026] As shown in Figures 3-7 , an alternative embodiment of the present application, the number of molds 202 of the single mold unit 2, the film cutting ring 1023, and the heat sealing head 1012 is the same and one-to-one correspondence, each film cutting ring 1023 is respectively sleeved outside the corresponding heat sealing head 1012.

[0027] As shown in Figure 5 , an alternative embodiment of the present application, the pad plate 1014 is provided with a plurality of first through holes 10141, and the platen 1013 is provided with a plurality of second through holes 10131, the number of the first through holes 10141, the second through holes 10131 and the film cutting ring 1023 is the same and one-to-one correspondence. When the film cutting ring 1023 is lifted, it passes through the corresponding first through hole 10141 and second through hole 10131.

[0028] As shown in Figures 5-7 , an alternative embodiment of the present application, the film cutting ring positioning plate 1024 is slidably sleeved on all guide columns 10114 and avoids all first compression springs 10117. Therefore, the film cutting ring positioning plate 1024 does not affect the extension of the first compression spring 10117.

[0029] As shown in Figure 4 , an alternative embodiment of the present application, the lifting frame 10112 includes a first top plate 101121, a plurality of vertical lifting rods 101122, a downward pressing main plate 101123, a second positioning plate 101124, a spring plate 101125, and a heat sealing head positioning plate 101126. The first top plate 101121 is installed on the first driving end 101111 of the first driving member 10111, the top ends of all vertical lifting rods 101122 are connected to the first top plate 101121, the bottom ends of all vertical lifting rods 101122 are connected to the downward pressing main plate 101123 after passing through the first positioning plate 10113 downward, the bottom surface of the downward pressing main plate 101123 is connected to the second positioning plate 101124 through a plurality of first connecting members 101127, the bottom surface of the second positioning plate 101124 is connected to the spring plate 101125 through a plurality of second connecting members 101128, the bottom surface of the spring plate 101125 is connected to the heat sealing head positioning plate 101126 through a plurality of third connecting members 101129, and all heat sealing heads 1012 are installed on the heat sealing head positioning plate 101126.

[0030] As shown in Figure 3 , 4 , in an alternative embodiment of the present application, the heat sealing head positioning plate 101126 is further provided with a calibration plate 1011261 on each side, and the bottom end of the calibration plate 1011261 is provided with at least one calibration slot 10112611, and the top surface of the mold positioning plate 201 is provided with a plurality of calibration taper blocks 203, the calibration taper blocks 203 of the same mold positioning plate 201 are the same in number as all the calibration slots 10112611 and one-to-one corresponding, when the lifting frame 10112 is lowered, the two calibration plates 1011261 respectively contact the top surface of the same mold positioning plate 201, and all the calibration taper blocks 203 of the mold positioning plate 201 are respectively inserted into the corresponding calibration slots 10112611.

[0031] As shown in Figure 4 ,

[0032] As shown in Figure 4 , 5 , in an alternative embodiment of the present application, the heat sealing head 1012 is installed on the heat sealing head positioning plate 101126 through the heat sealing spring 10121.

[0033] As shown in Figure 6 , 7 , in an alternative embodiment of the present application, the drive frame 1022 includes a second top plate 10221 and a plurality of drive rods 10222, the second top plate 10221 is installed on the second drive end 10211 of the second drive unit 1021, the top ends of all the drive rods 10222 are connected to the second top plate 10221, and the bottom ends of all the drive rods 10222 extend downward and pass through the lifting frame 10112 to connect the film cutting ring positioning plate 1024.

[0034] As shown in Figure 6 , 7 , in an alternative embodiment of the present application, the second drive unit 1021 is a second air cylinder, and the second drive end 10211 is a second piston shaft of the second air cylinder, and the second piston shaft extends upward and connects the drive frame 1022.

[0035] The working process of this embodiment will be introduced as follows: Figures 1-7

[0036] ​The initial state, the first piston of the first cylinder extends axially upward, so that the lifting frame 10112 is at the highest position, the second driving end 10211 of the second cylinder extends upward, so that the driving frame 1022 is at the highest position, at this time, the gap between the pad plate 1014 and the film pressing plate 1013 leaves a gap for the film to pass through. Before work, the heat sealing and film cutting structure needs to be installed on the cup container packaging production line, so that the film of the film conveying mechanism passes through the gap between the pad plate 1014 and the film pressing plate 1013, and the mold positioning plate 201 of each mold unit 2 is respectively installed on the conveying mechanism, and the first positioning plate 10113 of the heat sealing and film cutting device 1 is connected with the support, which is usually the wall of the machine frame or the factory building.

[0037] When working, the following work is sequentially performed:

[0038] 1. One mold unit 2 is conveyed below the heat sealing and film cutting device 1;

[0039] 2. The first piston shaft of the first cylinder is retracted, driving the lifting frame 10112 to descend, until the two alignment plates 1011261 respectively contact the top surface of the mold positioning plate 201 of the mold unit 2, at which time all the alignment taper blocks 203 of the mold positioning plate 201 are respectively inserted into the corresponding alignment grooves 10112611, and at the same time, the following actions are completed: the pad plate 1014 contacts the top surface of the mold positioning plate 201, then the lifting frame 10112 continues to descend, driving the film pressing plate 1013 to move downward, pressing the film between the two to the pad plate 1014 and tightly pressing the film, realizing the sealing of the space on the inner side, then all the heat sealing heads 1012 descend and contact the film on the mold 202, heat sealing the cup container in the mold 202;

[0040] 3. The second piston shaft of the second cylinder is retracted, driving the driving frame 1022 to descend, and all the film cutting rings 1023 move downward to cut the film;

[0041] 4. The second piston shaft of the second cylinder is extended, driving the driving frame 1022 to ascend to the original position;

[0042] 5. The first piston shaft of the first cylinder is extended, driving the lifting frame 10112 to ascend to the original position.

[0043] Then the mold unit 2 is sent away, and the next mold unit 2 is conveyed below the heat sealing and film cutting device 1. In this way, the sealing of the cup container can be continuously completed.

[0044] The embodiment improves the structure of the mold unit 2 (sets the mold 202 on the top surface of the mold positioning flat plate 201 and protrudes upward, so that there is no restriction outside the mold 202, so that the cutting film ring 1023 can be designed without considering the collision with the structure of the mold unit 2 located outside the mold 202), and two driving units are respectively used to drive the cutting film ring 1023, the heat sealing head 1012 and the mold unit 2 to cooperate, so that the action of the cutting film ring 1023 and the heat sealing head 1012 can be accurately controlled, so that the action of the cutting film ring 1023 and the heat sealing head 1012 is more accurate, and the size of the cutting film ring 1023 can be designed to be closer to the mold 202, and the edge of the finished film is closer to the edge of the cup-shaped container opening, effectively improving the quality of the product. The tray provided in the mold unit 2 is removed and replaced by the pad 1014, and the pad 1014 and the pressing film plate 1013 are arranged at the bottom of the lifting frame 10112, so that they can cooperate with each other, and the film passing space is maintained between them in the non-working state. When working, the pad 1014 abuts against the top surface of the mold positioning flat plate 201, and the pressing film plate 1013 presses the film onto the pad 1014 to form a sealed space in each first through hole 10141 of the pad 1014, facilitating vacuumizing, inflating and other operations. After the work is completed, the lifting frame 10112 rises, and they are automatically returned to the original position under the action of the first compression spring 10117 and the second compression spring 10116, respectively, and the film passing space appears between them, facilitating the film conveying and passing between them. Moreover, the producer can adjust the processing steps according to the needs to adapt to the needs of production. The structure is reasonable, and the driving device is two cylinders. Only a few parts such as the cutting film ring 1023 and the heat sealing head 1012 have high precision requirements, which effectively improves the work efficiency and energy utilization rate, greatly reduces the equipment cost and production cost.

[0045] In addition, it should be noted that the specific embodiments described in the specification, the name of each part and the like can be different, and any equivalent or simple change made according to the structure, features and principles of the utility model patent concept is included in the protection scope of the utility model patent. The person skilled in the art of the utility model can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as it does not deviate from the structure of the utility model or exceed the scope defined by the present claims, which should belong to the protection scope of the utility model.

Claims

1. A heat seal cutting structure of a cup container packaging production line, comprising a heat seal cutting film device and at least one mold unit, the heat seal cutting film device being located above the mold unit, characterized in that: The mold unit comprises a mold positioning plate for mounting on a conveying mechanism, at least one mold, the mold being arranged on the top surface of the mold positioning plate and protruding upward, and a portion of the mold positioning plate inside the mold being provided with through holes in communication with the mold; the heat sealing and film cutting device comprises a heat sealing lifting mechanism and a film cutting lifting mechanism, the heat sealing lifting mechanism comprising a first driving unit, a plurality of heat sealing heads, a film pressing plate and a backing plate, all the heat sealing heads being respectively mounted on the first driving unit, the first driving unit driving the heat sealing heads to lift, the film pressing plate and the backing plate being respectively and liftably mounted on the bottom of the first driving unit, the film pressing plate being located above the backing plate, the film pressing plate and the first driving unit being connected by a plurality of first elastic return elements, the backing plate and the first driving unit being connected by a plurality of second elastic return elements, and the film pressing plate and the backing plate having a film passing space in the initial state; the film cutting lifting mechanism comprises a second driving unit, a driving frame, a plurality of film cutting rings and a film cutting ring positioning plate, the second driving unit being mounted on the first driving unit, the driving frame being mounted on the second driving end of the second driving unit, the film cutting ring positioning plate being mounted on the bottom of the driving frame, each film cutting ring being respectively mounted on the bottom surface of the film cutting ring positioning plate, and the film cutting ring positioning plate being arranged between the lifting frame and the film pressing plate.

2. The hot-seal cutting structure of a cup container packaging line according to claim 1, characterized by: The first driving unit comprises a first driving element, a lifting frame and a first positioning plate for connecting a support, the first driving element being mounted on the first positioning plate, the lifting frame being mounted on the first driving end of the first driving element, a plurality of vertical connecting rods being mounted on the bottom of the lifting frame, the backing plate being slidably mounted on the bottom ends of all the vertical connecting rods, and the film pressing plate being liftably sleeved on all the vertical connecting rods and located above the backing plate, all the heat sealing heads being respectively mounted on the lifting frame.

3. The hot-seal cutting structure of a cup container packaging line according to claim 2, characterized by: The bottom of the lifting frame is further provided with a plurality of guide columns, the film pressing plate is slidably arranged on all the guide columns, and all the guide columns are provided with first elastic return elements, the two ends of each first elastic return element being respectively connected to the lifting frame and the film pressing plate, each vertical connecting rod is provided with a second elastic return element, and the two ends of each second elastic return element abut against the lifting frame and the backing plate.

4. The hot-seal cutting structure of a cup container packaging line according to claim 1, wherein: The number of the mold, the film cutting ring and the heat sealing head of the single mold unit is the same and one-to-one correspondence, each film cutting ring is respectively mounted on the bottom surface of the film cutting ring positioning plate and sleeved on the outside of the corresponding heat sealing head.

5. The hot-seal cutting structure of a cup container packaging line according to claim 1, wherein: The backing plate is provided with a plurality of first through holes, the film pressing plate is provided with a plurality of second through holes, and the number of the first through holes, the second through holes and the film cutting rings is the same and one-to-one correspondence.

6. The heat-seal cutting structure of a cup container packaging line according to any one of claims 2 to 5, wherein: The lifting frame comprises a first top plate, a plurality of vertical lifting rods, a lower pressing main plate, a second positioning plate, a spring plate and a heat sealing head positioning plate, the first top plate being mounted on the first driving end of the first driving element, the top ends of all the vertical lifting rods being respectively connected to the first top plate, the bottom ends of all the vertical lifting rods being respectively connected to the lower pressing main plate after passing through the first positioning plate downward, the bottom surface of the lower pressing main plate being connected to the second positioning plate through a plurality of first connecting elements, the bottom surface of the second positioning plate being connected to the spring plate through a plurality of second connecting elements, the bottom surface of the spring plate being connected to the heat sealing head positioning plate through a plurality of third connecting elements, and all the heat sealing heads being respectively mounted on the heat sealing head positioning plate.

7. The hot-seal cutting structure of a cup container packaging line according to claim 6, characterized by: The heat sealing head positioning plate is also provided with a calibration plate on each side, the calibration plate is provided with at least one calibration slot at the bottom end, the top surface of the mold positioning plate is provided with a plurality of calibration taper blocks, the calibration taper blocks of the same mold positioning plate are the same in number as all the calibration slots and one-to-one corresponding.

8. The hot-seal cutting structure of a cup container packaging line according to claim 2, wherein: The first driving member is a first cylinder, the first driving end is a first piston shaft of the first cylinder, the first piston shaft extends upward and is connected with the lifting frame; the second driving unit is a second cylinder, the second driving end is a second piston shaft of the second cylinder, the second piston shaft extends upward and is connected with the driving frame.

9. The hot-seal cutting structure of a cup container packaging line according to claim 1, wherein: The heat sealing head is installed on the heat sealing head positioning plate through a heat sealing spring.

10. The hot-seal cutting structure of a cup container packaging line according to claim 1, wherein: The driving frame comprises a second top plate and a plurality of driving rods, the second top plate is installed on the second driving end of the second driving unit, the top ends of all the driving rods are connected with the second top plate, and the bottom ends of all the driving rods extend downward and are connected with the film cutting ring positioning plate after penetrating through the lifting frame.

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