Packaging cup sealing device

Abstract

A packaging cup sealing film device comprises a rack, a film transmission device, a film tension adjusting device, a packaging cup clamp, and a hot cutting device. The film tension adjusting device maintains the sealing film in a tension state. The film transmission device intermittently transmits the sealing film to above the packaging cup clamp and completes pre-alignment. The roller group installed on the lifting frame drives the sealing film in the tension state of the hot cutting processing area to move to the packaging cup clamp, so that the alignment holes on the sealing film are paired and aligned with the alignment pins on the packaging cup clamp. The hot cutting device synchronously hot cuts the sealing film and the cup body in the assembly hole after pairing and alignment. The film stripping device strips the sealing film and the packaging cup clamp. The device can realize high flatness of the sealing film, alignment accuracy between the pattern and the packaging cup, high pressing tightness between the sealing film and the packaging cup, and regularity of the sealing film edge. Meanwhile, the device has strong universality, can greatly reduce the difficulty of the debugging process, reduce the energy consumption of the device operation, and improve the operation efficiency.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment, and more specifically to a packaging cup sealing device. Background Technology

[0002] Using cups as containers is a common packaging method. To prevent spillage, sealing film is usually used to seal the cup opening, creating a closed structure. To increase product appeal and enhance consumer awareness, printed patterns, trademarks, and other information are often added to the sealing film. Currently, the packaging process for these cups involves mass production using packaging equipment. This equipment uses at least one cup holder and at least one film conveyor to move the sealing film in a reciprocating cycle. The sealing film is moved perpendicular to the cup, aligned, heat-sealed, and cut to complete the packaging process.

[0003] When evaluating the sealing effect of packaging equipment, the following indicators are usually considered: ① flatness of the sealing film, ② alignment accuracy between the pattern of the sealing film and the packaging cup, ③ heat sealing effect between the sealing film and the packaging cup, and ④ regularity of the sealing film edges.

[0004] Typically, to address the technical issues mentioned in points ① and ② above, existing technologies often use photoelectric sensors to detect positioning marks on the sealing film, combined with a film transport device and a film tension adjustment device for film transport and positioning. However, this method relies on photoelectric sensing signals to control the film transport device to stop the film transport, and then uses the film tension adjustment device to adjust the film tension. This process can lead to a certain difference between the actual movement of the sealing film and the pre-aligned position due to differences in stopping response speed and film tension. For packaging cups with a larger opening area, consumers are relatively accepting of slight deviations in the sealing film pattern and weaker film tension caused by these differences. However, for small packaging cups with an opening diameter of less than 5cm, even slight deviations in the sealing film can be noticed by consumers. Furthermore, the heat-pressing area at the edge of a smaller cup opening is smaller. Increasing the heat-pressing time or raising the heat-pressing temperature to improve the heat-sealing effect can easily lead to irregularities at the edge of the sealing film.

[0005] To solve the above-mentioned technical problems, the applicant disclosed a packaging cup sealing device with accurate sealing film alignment and high flatness through ZL201810430706.X. The device uses a pressing and aligning device located above the sealing film to press the sealing film downwards, causing the sealing film at both ends of the pressing and aligning device to move towards the pressing knife, thereby tightening the sealing film at both ends of the pressing knife. At the same time, the pattern can correspond to the packaging cup clamps at both ends of the pressing knife and achieve accurate alignment with the hot pressing device and the edge cutting device. Furthermore, the hot pressing device and the edge cutting device are adjustable, highly replaceable, and relatively convenient to maintain.

[0006] However, due to the performance differences of different batches of sealing film materials and the production process of different types of packaging cups, it is necessary to make relatively complicated adjustments to the flattening and alignment device, especially the pressing range and pressing force of the pressing knife. Furthermore, the precision requirements for each pressing of the pressing knife are high, so the equipment adjustment frequency is relatively high. Summary of the Invention

[0007] The technical objective of this invention is to provide a packaging cup sealing device that can achieve high flatness of the sealing film, accurate alignment between the pattern and the packaging cup, high pressure sealing between the sealing film and the packaging cup, and regularity of the sealing film edge. At the same time, the device is highly versatile and can significantly reduce the difficulty of the debugging process, reduce the energy consumption of the device and improve the operating efficiency.

[0008] To achieve the above objectives, the present invention employs the following technical means:

[0009] A packaging cup sealing device includes a frame with a lifting frame, a film conveying device, a film tension adjusting device with at least one pair of rollers, a packaging cup clamp with several assembly holes, and a hot-press cutting device with a pressure driving device. The film tension adjusting device maintains the sealing film under tension. The film conveying device intermittently conveys the film to the packaging cup clamp and completes pre-alignment. The rollers installed on the lifting frame drive the tensioned sealing film in the hot-press cutting processing area to move towards the packaging cup clamp, so that the alignment holes on the sealing film are matched and aligned with the alignment pins on the packaging cup clamp. The hot-press cutting device performs synchronous hot-press cutting on the matched and aligned sealing film and the cup body in the assembly holes. The film peeling device peels the sealing film and the packaging cup clamp.

[0010] Furthermore, along the conveying direction of the sealing film, the film tension adjustment device includes a front static tension roller group, a front moving tension roller group, a rear moving tension roller group, and a rear static tension roller group arranged from front to back. The area between the front moving tension roller group and the rear moving tension roller group forms the hot pressing and cutting processing area. The front moving tension roller group and the rear moving tension roller group installed on the lifting frame drive the tensioned sealing film located in the hot pressing and cutting processing area to move towards the packaging cup clamp.

[0011] Furthermore, the front moving tension roller group consists of at least one set of front clamping rollers and at least one front moving roller driven by the front pushing mechanism, and the rear moving tension roller group consists of at least one set of rear clamping rollers and at least one rear moving roller driven by the rear pushing mechanism. When the front and rear pushing mechanisms drive the front and rear moving rollers to move, the front and rear moving rollers drive the tensioned sealing film located in the hot pressing and cutting processing area to move towards the packaging cup clamp.

[0012] Furthermore, the membrane transfer device drives the front clamping roller group and the rear clamping roller group, as well as the front static tensioning roller group or the rear static tensioning roller group, to rotate synchronously via a transmission toothed belt.

[0013] Furthermore, the hot pressing and cutting device includes a pressure driving device, a frame guide column, a pressing seat, a pressing and cutting template with several pressing and cutting template through holes, and several hot pressing columns that are guided and sleeved in the pressing and cutting template through holes. The pressure driving device installed on the frame drives the pressing seat to move along the frame guide column, so that the pressing and cutting template installed on the pressing seat moves toward the packaging cup clamp, and so that the die-cutting blades on the outer edge of each pressing and cutting template through hole are paired with the cutting grooves on the outer edge of each assembly hole for pressing and cutting, and so that each hot pressing column is guided to move toward each assembly hole along the pressing and cutting template through hole.

[0014] Furthermore, the pressing seat includes a fixed pressure plate and a dynamic pressure plate. The guide portion of each hot pressing column is fitted into the fixed pressure plate through hole of each fixed pressure plate, and the pressing portion is fitted into the dynamic pressure plate through hole of each dynamic pressure plate. The pressing portion partition is mounted on the dynamic pressure plate through hole, with its pressing surface not recessed into the through hole of the cutting template. A plurality of first spring members are fitted outside each hot pressing column, with their ends correspondingly abutting against the fixed pressure plate and the pressing portion partition. The cutting template is guided and connected to the dynamic pressure plate through a plurality of dynamic pressure plate guide columns. A plurality of second spring members are fitted onto each dynamic pressure plate guide column, with their ends correspondingly abutting against the dynamic pressure plate and the cutting template. Preferably, the pressing surface of the pressing portion is annular; more preferably, the pressing surface has a plurality of pressing lines protruding outward from the through hole of the cutting template.

[0015] Furthermore, a guide post and a guide hole are provided between the cutting template and the packaging cup clamp. The guide post template and the guide hole are separated from each other and form a space for the sealing film to be transported.

[0016] Furthermore, the film peeling device includes a peeling sheet and a peeling sheet driving mechanism. The peeling sheet is disposed between the sealing film and the packaging cup clamp and is suspended above the packaging cup clamp. The peeling sheet driving mechanism drives the peeling sheet to reciprocate from one end of the packaging cup clamp to the other end relative to the conveying direction of the sealing film.

[0017] Furthermore, a photoelectric positioning device is also provided to pre-align the sealing film.

[0018] Furthermore, several packaging cup clamps are combined to form a packaging cup clamp chain, and the clamp conveying device drives the packaging cup clamp chain to move in a cyclical stepping motion.

[0019] The present invention has at least the following advantages:

[0020] 1. By aligning the pre-aligned sealing film, the alignment holes of the sealing film are matched and engaged with the alignment pins of the packaging cup clamp, which enables a highly accurate alignment effect between the sealing film and the packaging cup clamp. This ensures that the printed pattern on the sealing film can be accurately matched with the packaging cup inside the packaging cup clamp during the alignment process. Preferably, a scheme with an interference fit between the alignment pin with a tapered head and the alignment hole of the sealing film is adopted, which can further ensure the tension effect and alignment accuracy of the aligned sealing film.

[0021] 2. The present invention provides an improved hot-press cutting device, which adopts a hot-pressing method by guiding the hot-pressing column relative to the pressing seat and the pressing template to perform hot-press cutting. This method can enclose the sealing film in the inner hole of the die-cutting knife and make the edge height of the sealing film uniform, without edge burrs or wrinkles. More preferably, by reasonably setting the shape of the pressing surface of the pressing part, the periphery of the sealing film after hot-pressing can be slightly retracted relative to the edge of the cup mouth, thereby effectively preventing the outer periphery of the sealing film from protruding out of the packaging cup and causing irregular folding.

[0022] 3. By using a pressure-driven device to perform a single pressing action to drive synchronous hot cutting, the operating efficiency of the equipment can be effectively improved. Furthermore, by setting up multiple sets of parallel packaging cup sealing devices and setting the packaging cup clamps in the form of a packaging cup clamp chain driven by a clamp conveyor, it can simultaneously perform hot cutting on the packaging cups and multiple sets of sealing films in multiple sets of packaging cup clamps. This not only significantly improves the operating efficiency of the equipment but also effectively saves the space occupied by the equipment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the invention from another angle;

[0025] Figure 3 This is a schematic diagram of the present invention with the packaging cup clamp, film feeding device, and front static tension roller group concealed.

[0026] Figure 4 yes Figure 3 Enlarged view of region A;

[0027] Figure 5 This is a cross-sectional schematic diagram of the present invention, omitting the dynamic pressure plate, spring component, and hot-pressing column. Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0031] like Figure 1-5 As shown, a packaging cup sealing device includes a frame 10 with a lifting frame 11, a film conveying device, a film tension adjusting device with at least one pair of rollers, multiple packaging cup clamps 30 with identical structures and each provided with multiple assembly holes 31, and a hot pressing and cutting device with a pressure driving device 41, wherein:

[0032] The film transport device consists of a film feeding device 21 located at the front end of the sealing film 50 in the transport direction and a film transport motor 22 located at the rear end of the sealing film 50 in the transport direction. The film transport device transports the sealing film 50 from the hot-pressing and cutting processing area 51 horizontally. Along the transport direction of the sealing film 50, the film transport motor 22, the front moving tension roller group 62, and the rear moving tension roller group 63 are mounted on the lifting frame 11. The film tension adjustment device includes a front stationary tension roller group 61, a front moving tension roller group 62, a rear moving tension roller group 63, and a rear stationary tension roller group 64 arranged from front to back. The film transport motor 22 drives each roller to rotate synchronously. The pressure drive device 41 of the hot-pressing and cutting device is installed on... On the frame 10, during the vertical movement and locking of the lifting frame 11 to its final position, the front stationary tension roller group 61, the front moving tension roller group 62, the rear moving tension roller group 63, and the rear stationary tension roller group 64 maintain the tension of the sealing film 50 and complete the height adjustment of the distance between the sealing film 50 and the packaging cup clamp 30. As the film feeding device 21 and the film transfer motor 22 transmit the sealing film 50, the sealing film 50 in the range from the front stationary tension roller group 61 to the rear stationary tension roller group 64 remains in a tensioned state, and the area between the front moving tension roller group 62 and the rear moving tension roller group 63 forms a hot pressing and cutting processing area 51 for the hot pressing and cutting process of the sealing film 50 and the packaging cup.

[0033] In this embodiment, by using multiple alignment holes 52 arranged at fixed intervals on the edge of the sealing film 50, and in conjunction with the positioning of the photoelectric sensor 211 and the sealing film sensing mark 53 on the film feeding device 21, the film transmission device can intermittently transmit the sealing film 50 at a fixed distance above the packaging cup clamp 30. Whenever the photoelectric sensor 211 senses the sealing film sensing mark 53, the pattern printed on the sealing film 50 moves to align with each assembly hole 31, thus completing the pre-alignment of the sealing film 50.

[0034] The individual packaging cup clamps 30 are combined to form a packaging cup clamp chain. The packaging cup clamp chain is driven by a clamp conveying device so that the packaging cup clamps 30 move in a cyclical stepping motion below the sealing film 50. After each stepping motion, the packaging cup clamp 30 delivers the packaging cups to be sealed in each assembly hole 31 to below the hot pressing and cutting processing area 51. At this time, the multiple alignment pins 32 provided on the packaging cup clamp 30 are exactly matched in size and position with the alignment holes 52 of the sealing film 50 within the hot pressing and cutting processing area 51.

[0035] The film tension adjustment device maintains the sealing film 50 under tension. The film transfer device intermittently transfers the film to the packaging cup clamp 30 and completes pre-alignment. At this time, the alignment hole 52 of the sealing film 50 and the alignment pin 32 of the packaging cup clamp 30 are aligned with each other. The front tension roller group 62 and the rear tension roller group 63 drive the packaging cup clamp 30, which is in a tensioned state in the hot pressing and cutting processing area 51, to move vertically downward, so that the alignment hole 52 is fitted into the alignment pin 32. To further improve the accuracy and smoothness of the alignment process, preferably, the top of the alignment pin 32 is tapered and the base is columnar, and the alignment hole 52 and the base form an interference fit. After the pre-alignment is completed, if the alignment hole 52 and the alignment pin 32 are slightly offset, the top of the tapered alignment pin 32 can correct the misalignment of the alignment hole 52. When the alignment hole 52 and the base of the alignment pin 32 are matched and fitted, the accuracy can be greatly improved.

[0036] With the assistance of the alignment pins 32 and alignment holes 52 that are matched in size and aligned in position, the pattern printed on the sealing film 50 can be accurately aligned with each packaging cup in the packaging cup clamp 30. This avoids the problems of the existing technology that only uses photoelectric sensors as the positioning device for the sealing film 50, which have unstable braking response speed and film tension differences, resulting in deviations between the actual movement of the sealing film 50 and the pre-aligned position. In addition, the equipment operates stably with this alignment method and does not require complicated debugging.

[0037] After the sealing film 50 and the packaging cup clamp 30 are aligned, the hot-press cutting device is driven by the pressure driving device 41, allowing for simultaneous hot-press cutting of the sealing film 50 and the packaging cup at the locations of multiple assembly holes 31. Based on this embodiment, each packaging cup clamp 30 is provided with 48 assembly holes 31 with an opening diameter of 4cm, which can efficiently and properly complete the above-mentioned process. The deviation between the preset sealing position and the actual sealing position of the sealing film 50 pattern does not exceed 0.05mm.

[0038] After the hot-pressing and cutting process, the sealing film 50 and the packaging cup clamp 30 are in a fitted state due to the alignment hole 52 and the alignment pin 32. At this time, the film peeling device 70 peels the sealing film 50 and the packaging cup clamp 30. In this embodiment, the film peeling device 70 includes a peeling plate 71 and a peeling plate driving cylinder 72. The peeling plate 71 is disposed between the sealing film 50 and the packaging cup clamp 30 and extends horizontally along the moving direction of the packaging cup clamp 30 chain and is suspended above the packaging cup clamp 30. The peeling plate driving cylinder 72 drives the peeling plate 71 to move back and forth from one end of the packaging cup clamp 30 to the other end relative to the conveying direction of the sealing film 50. Therefore, after the hot pressing and cutting process is completed, the peeling sheet 71 can slide relative to the sealing film 50 and drive the alignment holes 52 of the sealing film 50 to disengage from the alignment pins 32. After the sealing film 50 and the packaging cup clamp 30 are separated, the peeling sheet drive cylinder 72 drives the peeling sheet 71 to reset. At this time, the film transfer device continues to drive the sealing film 50 to move, and the sealing film 50 is collected by the external film collection device. In the tensioned state, the sealing film 50 moves to the hot pressing and cutting processing area 51 again. At the same time, when the next packaging cup clamp 30 drives the unsealed packaging cup to the processing station, the above process is repeated to complete the next round of hot pressing and cutting process.

[0039] To further enhance the controllability of the front moving tension roller group 62 and the rear moving tension roller group 63, making them suitable for applications of various sealing film 50 materials with different tensions, this embodiment sets the front moving tension roller group 62 to consist of a set of front clamping rollers 621 and a front movable roller 622 driven by a front pushing mechanism, and the rear moving tension roller group 63 to consist of a set of rear clamping rollers 631 and a rear movable roller 632 driven by a rear pushing mechanism. The front clamping roller group 621 and the rear clamping roller group 631 are axially connected to the upper side of the lifting frame 11. The front pushing mechanism includes a front pushing cylinder 623, a front slide rail 624, and a front roller shaft seat 625, and the rear pushing mechanism includes a rear pushing cylinder 633, a rear slide rail 634, and a rear roller shaft seat 635. The front pushing cylinder 623 and the front slide rail 624 are fixed to the lifting frame 11. Located below the front clamping roller group 621, the rear pushing cylinder 633 and the rear slide rail 634 are fixed to the lifting frame 11 and located below the rear clamping roller group 631; the front movable roller 622 is axially connected to the front roller shaft seat 625 driven by the front pushing cylinder 623 and sliding along the front slide rail 624, and the rear movable roller 632 is axially connected to the rear roller shaft seat 635 driven by the rear pushing cylinder 633 and sliding along the rear slide rail 634. The sealing film 50, which is tensioned and horizontally output after being adjusted by the front movable tensioning roller group 62, folds down and forward after passing through the clamping seam outlet of the front clamping roller group 621 and wraps around the front roller surface of the front movable roller 622, extends and wraps around the rear roller surface of the rear movable roller 632, then folds up and forward and enters through the clamping seam inlet of the rear clamping roller group 631, and then is horizontally tensioned and transmitted to the rear static tensioning roller group 64.

[0040] With this configuration, when the front pushing mechanism and the rear pushing mechanism push the front movable roller 622 and the rear movable roller 632 in opposite directions, the sealing film 50 can be kept in a stopped state because the front static tension roller group 61 to the front clamping roller group 621 and the rear static tension roller group 64 to the rear clamping roller group 631 can maintain the sealing film 50 in a stopped state. Meanwhile, the sealing film 50 rolls along the axes of the front movable roller 622 and the rear movable roller 632 in a tensioned state. At this time, the range of the hot pressing and cutting processing area 51 is reduced, so the front clamping roller group 621 to the axis of the front movable roller 622 and the rear clamping roller group 631 to the rear movable roller 632... The horizontal distance of the sealing film 50 on the two axes is converted into a vertical distance, so that the front movable roller 622 and the rear movable roller 632 drive the tensioned sealing film 50 located in the hot pressing and cutting processing area 51 to move towards the packaging cup clamp 30, thereby enabling the sealing film 50 to be smoothly aligned with the assisted alignment pin 32 and alignment hole 52. This solution is particularly suitable for sealing film 50 materials with relatively low tensile strength, and can effectively increase the working frequency of the pressure drive device 41 driving the hot pressing and cutting device, thereby effectively improving the equipment operating efficiency.

[0041] Furthermore, in this embodiment, the film transport motor 22 on the lifting frame 11 drives the rear clamping roller group 631 via the first transmission toothed belt 651, the rear clamping roller group 631 drives the front clamping roller group 621 via the second transmission toothed belt 652, and the rear static tensioning roller group 64 to rotate synchronously via the third transmission toothed belt 653. Combined with the multiple film tension adjustment structures in the front static tensioning roller group 61, when sealing the film 50, the film transport motor 22 drives the transmission toothed belt, which can drive the rollers of the front static tensioning roller group 61, the front clamping roller group 621, the rear clamping roller group 631, and the rear static tensioning roller group 64 to rotate synchronously; and by retaining the front static tensioning roller... Group 61 is an indirect transmission method that uses the sealing film 50 for traction, rather than direct drive by a toothed belt. Under the condition that the front static tension roller group 61 to the front clamping roller group 621 and the rear static tension roller group 64 to the rear clamping roller group 631 can maintain the synchronous stop state of the sealing film 50, a certain tension adjustment margin can be left for the transmission of the sealing film 50 by adjusting the tension of each roller in the front static tension roller group 61. Furthermore, when the sealing film 50 experiences abnormal slight deviation due to mechanical vibration during equipment operation, the abnormal deviation of the sealing film 50 can be reduced by adjusting the tension and position of the sealing film 50 by the front static tension roller group 61.

[0042] To further improve the hot pressing and cutting effect, the hot pressing and cutting device in this embodiment includes, in addition to the pressure driving device 41 and the frame guide column 42, a pressing seat 43, a pressing and cutting template 44, and hot pressing columns 45. The pressing and cutting template 44 has pressing and cutting template through holes 441 corresponding to 48 assembly holes 31. The 48 hot pressing columns 45 are guided and sleeved in the pressing and cutting template through holes 441. Each hot pressing column 45 can be independently electrically heated through its built-in heating device, which enables more accurate thermal control of the hot pressing column 45; pressure driving... The device 41 drives the pressing seat 43 to move along the frame guide column 42, so that the pressing and cutting template 44 installed on the pressing seat 43 moves towards the packaging cup clamp 30, and the die-cutting blade 442 on the outer edge of the through hole 441 of each pressing and cutting template is paired with the cutting groove 311 on the outer edge of each assembly hole 31 for pressing and cutting. In this embodiment, the die-cutting blade 442 and the cutting groove 311 are both teardrop-shaped, and the pressing surface 452 of the hot pressing column 45 is annular. Each hot pressing column 45 is guided to move along the through hole 441 of the pressing and cutting template towards each assembly hole 31.

[0043] Compared to existing hot-press cutting devices, the hot-press cutting device in this embodiment can complete the hot-press cutting action in the same pressing step in one pressing action by using the pressing and cutting template 44 and the hot-pressing column 45 on the pressing seat 43, in the sequence of sealing film die-cutting and sealing film cup mouth hot pressing. By matching and pressing the die-cutting blade 442 on the outer edge of the pressing and cutting template through the through hole 441 with the blade groove 311 on the outer edge of each assembly hole 31, the die-cut sealing film 50 can be made into a circular shape with a detachable tongue, and the sealing film 50 is surrounded in the inner hole of the die-cutting blade 442; at the same time, the heat transfer of the hot-pressing column 45 to the pressing and cutting template through the through hole 441 causes the temperature of the die-cutting blade 442 to rise, so that the edge of the sealing film 50 can be neatly cut without producing burrs; and under the pressing of the hot-pressing column 45 in the pressing and cutting template through the through hole 441, the hot pressing accuracy of the sealing film 50 and the cup mouth edge can be ensured.

[0044] To further improve the hot pressing effect of the hot pressing and cutting device, this embodiment also makes the following optimizations: the pressing seat 43 includes a fixed pressure plate 431 and a moving pressure plate 432; the guide part of each hot pressing column 45 is fitted into the fixed pressure plate through hole 433 of each fixed pressure plate 431; the pressing part 451 is fitted into the moving pressure plate through hole 434 of each moving pressure plate 432; the partition of the pressing part 451 is placed in the moving pressure plate through hole 434 and the pressing surface 452 is not recessed into the pressing and cutting template through hole 441; a plurality of first spring members 461 are fitted onto the outside of each hot pressing column 45 and their two ends abut against the fixed pressure plate 431 and the moving pressure plate 432 respectively. The cutting template 44 is guided and connected to the moving pressure plate 432 by a number of moving pressure plate guide posts 433. On the outer periphery between the moving pressure plate 432 and the cutting template 44, a number of moving pressure plate guide posts 433 are symmetrically and evenly arranged. The second spring member 462 is fitted on each moving pressure plate guide post 433 and its two ends abut against the moving pressure plate 432 and the cutting template 44 respectively. The lower edge of the moving pressure plate guide post 433 passes through the through hole of the cutting template 44 and cooperates with the guide post 471 and the guide hole 472 between the packaging cup clamp 30. The guide post 471 template and the guide hole 472 are separated from each other and form a space for the sealing film 50 to be transported.

[0045] Based on this configuration, when the die-cutting blades 442 of the cutting template 44 installed at the lower end of the dynamic pressure plate 432 complete the die-cutting of the sealing film 50, the hot pressing column 45 simultaneously presses the cut sealing film 50 and the edge of the cup mouth within the through hole 441 of the cutting template, effectively preventing wrinkling of the hot-pressed part of the sealing film 50. More preferably, the pressing lines 453 below the adjustable pressing surface 452 protrude outward from the through hole 441 of the cutting template, which can press the sealing film 50 through the pressing lines 453 and the outer edge of the assembly hole 31 before the die-cutting blades 442 cut the sealing film 50. The sealing film 50 and the edge of the cup are clamped and pressed first to achieve pressing and positioning and light heat pressing between the sealing film 50 and the packaging cup. Compared with heat pressing using only the flat pressing surface 452, it can achieve heat pressing and sealing of the sealing film 50 with a narrower cup edge. It is especially suitable for sealing small packaging cups. It can also prevent the sealing film 50 from shifting to the packaging cup during the die cutting process due to insufficient sharpness of the die cutting blade 442 after long-term operation of the equipment. This can effectively improve the operating stability of the equipment.

[0046] When the pressure driving device 41 drives the fixed pressure plate 431 to move downward, under the action of the first and second spring members 462, the moving pressure plate 432 outputs elastic force to make the cutting template 44 continue to move downward, so that the die-cutting blade 442 cuts the sealing film 50. Furthermore, the first and second spring members 462 are respectively located inside the moving pressure plate 432 and on the outer periphery of the cutting template 44. While providing shock absorption and buffering effects, the first spring member 461 and the second spring member 462 make the pressure of the pressing template on the sealing film 50 uniform, and the cutting effect is more consistent for packaging cups with multiple die-cutting positions.

[0047] As the distance between the dynamic pressure plate 432 and the fixed pressure plate 431 shortens under the drive of the pressure driving device 41, the first spring member 461 applies an elastic force to the partition of each pressing part 451; thereby, the pressing lines 453 are pressed down further, causing thermal deformation of the edge of the cup mouth, and the die-cut sealing film 50 is pressed by the pressing surface 452 of the hot pressing column 45 and the pressing lines 453, so that the sealed packaging cup formed by hot pressing and cutting can form a shape with regular and burr-free edges of the sealing film 50 and recessed into the edge of the cup mouth.

[0048] After the sealing film 50 is hot-pressed and cut, the pressure drive device 41 drives the hot-pressing and cutting device to reset. At this time, the film peeling device 70 separates the excess material of the sealing film 50 from the packaging cup clamp 30, the film taking device winds up the excess material of the packaging film, and the clamp conveying device drives the chain of the packaging cup clamp 30 to move until the sealing film 50 is in a taut state and moves to the hot-pressing and cutting processing area 51 again. At the same time, when the next packaging cup clamp 30 moves the unsealed packaging cup to the processing station, the next round of process can be executed again, that is, the next hot-pressing and cutting process of the packaging cup can be carried out.

[0049] Compared to existing sealing films where the edge of the sealing film 50 is exposed on the packaging cup, this design not only gives the sealed packaging cup a neat appearance but also ensures that the sealing film 50 is fully stretched and the sealing effect is firm. Furthermore, when the tongue is pulled open, the separation line of the sealing film 50 is narrower than the edge of the cup rim, resulting in better ease of opening. In this embodiment, taking the assembly hole 31 with an opening diameter of 4cm as an example, combined with double-circular pressing lines 453 with diameters of 4.1cm and 4.2cm and a depth of 0.15mm, and an annular pressing surface 452 with an inner diameter of 4cm and an outer diameter of 4.6cm for the pressing part 451, it can achieve stable heat sealing of the 4.6mm wide cup rim edge. The edge of the sealing film 50 is recessed inward by approximately 0.3-0.5mm relative to the cup rim edge, and the edge of the sealing film 50 is neat and burr-free.

[0050] The present invention and its embodiments have been described above. This description is not restrictive, and the embodiments shown throughout are only one of the embodiments of the present invention. The actual structure is not limited to this. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A packaging cup sealing film apparatus comprising a machine frame having a lifting frame, a film transfer device, a film peeling device, a film tension adjusting device having at least one pair of roller sets, a packaging cup clamp having a plurality of assembly holes, a hot press cutting device having a pressure driving device, characterized in that: The film transmission device intermittently transmits the film to above the packaging cup clamp under the maintenance of the film tension adjusting device in a tension state, and completes pre-alignment, the roller group installed on the lifting frame drives the sealing film in the hot-pressing cutting processing area to move to the packaging cup clamp, so that the alignment holes on the sealing film are aligned with the alignment pins on the packaging cup clamp, and the hot-pressing cutting device synchronously cuts the sealing film and the cup body in the assembly hole after alignment. The film stripping device strips the sealing film and the packaging cup clamp. The film tension adjusting device comprises front static tension roller groups, front dynamic tension roller groups, rear dynamic tension roller groups and rear static tension roller groups arranged from front to back along the film transmission direction, the area between the front dynamic tension roller groups and the rear dynamic tension roller groups forms the hot-pressing cutting processing area, and the front dynamic tension roller groups and the rear dynamic tension roller groups installed on the lifting frame drive the sealing film in the hot-pressing cutting processing area to move to the packaging cup clamp. The front dynamic tension roller groups are composed of at least one front clamping roller group and at least one front movable roller driven by a front push mechanism, and the rear dynamic tension roller groups are composed of at least one rear clamping roller group and at least one rear movable roller driven by a rear push mechanism, the front and rear push mechanisms drive the front and rear movable rollers to move, so that the front and rear movable rollers drive the sealing film in the hot-pressing cutting processing area to move to the packaging cup clamp. The hot-pressing cutting device comprises a pressure driving device, a rack guide column, a pressing seat, a cutting die with a plurality of cutting die hole, and a plurality of hot-pressing columns which are one-to-one guided in the cutting die hole, the pressure driving device installed on the rack drives the pressing seat to move along the rack guide column, so that the cutting die installed on the pressing seat moves to the packaging cup clamp, the die cutting knives outside each cutting die hole are aligned with the cutting slot outside each assembly hole for cutting, and each hot-pressing column moves to each assembly hole along the cutting die hole. The pressing seat comprises fixed pressing plates and movable pressing plates, the guide parts of the hot-pressing columns are one-to-one guided in the fixed pressing plate holes of the fixed pressing plates, and the pressing parts are one-to-one guided in the movable pressing plate holes of the movable pressing plates, the pressing part partitions are one-to-one arranged in the movable pressing plate holes and the pressing surfaces are not concave in the cutting die hole, a plurality of first spring members are one-to-one guided outside the hot-pressing columns and the two ends are correspondingly abutted with the fixed pressing plates and the pressing part partitions, the cutting die is guided and connected with the movable pressing plates through a plurality of movable pressing plate guide columns, and a plurality of second spring members are guided in the movable pressing plate guide columns and the two ends are correspondingly abutted with the movable pressing plates and the cutting die.

2. The apparatus of claim 1, wherein: The film transmission device drives the front clamping roller groups and the rear clamping roller groups, and the front static tension roller groups or the rear static tension roller groups to synchronously rotate through the transmission toothed belt.

3. The apparatus of claim 1 wherein: The cutting die and the packaging cup clamp are provided with guide columns and guide holes, the guide columns and the guide holes are separated from each other and form a space through which the sealing film can be transmitted.

4. A packaging cup sealing film apparatus as claimed in any one of the claims 1-3, characterized in that: The film stripping device comprises a stripping sheet and a stripping sheet driving mechanism, the stripping sheet is arranged between the sealing film and the packaging cup clamp and suspended above the packaging cup clamp, and the stripping sheet driving mechanism drives the stripping sheet to reciprocate along the packaging cup clamp from one end to the other end relative to the transmission direction of the sealing film.

5. A packaging cup sealing film apparatus as claimed in any one of claims 1-3, characterized in that: Photoelectric positioning device is arranged, and the photoelectric positioning device performs pre-alignment on the sealing film.

6. The packaging cup sealing film apparatus as claimed in any one of claims 1 to 3, characterized in that: The plurality of packaging cup clamps are combined with each other to form a packaging cup clamp chain belt, and the clamp conveying device drives the packaging cup clamp chain belt to move in a circulating and stepping manner.

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