Cam link type ultrasonic end sealing mechanism for packaging machine

Abstract

This utility model relates to a cam-linkage type ultrasonic end-sealing mechanism for packaging machines, including a frame, an ultrasonic welding head mechanism and a bottom mold mechanism mounted on the frame. The ultrasonic welding head mechanism includes a left welding head turntable and a right welding head turntable, and also includes a welding head mounting beam. The two ends of the welding head mounting beam are connected to the corresponding welding head turntables via corresponding upper cam links. The upper cam link includes a rotating shaft whose axis extends left-right and is rotatably mounted on the corresponding welding head turntable. A mounting arm is fixed on the rotating shaft, and a posture adjustment cam is mounted on the rotating shaft. The posture adjustment cam has a cam shaft. A left cam plate is fixed on the left welding head turntable, and a right cam plate is fixed on the right welding head turntable. Cam grooves are respectively provided on the left and right cam plates. The cam shaft and the corresponding cam groove guide and move in a circumferential direction. The axis of the ultrasonic transducer extends radially along the turntable. This utility model is used to improve end-sealing efficiency by using at least two ultrasonic welding heads.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic end sealing of packaging bags, and in particular to a cam-linkage type ultrasonic end sealing mechanism for packaging machines. Background Technology

[0002] Traditional packaging machines mostly use heat sealing to achieve horizontal sealing and cutting. Horizontal sealing refers to the end sealing of the packaging bag. This sealing and cutting method is easily affected by a variety of external factors (such as temperature, pressure, and materials). In other words, heat sealing will lead to a reduction in the quality and efficiency of sealing and cutting.

[0003] Compared with traditional heat sealing methods, ultrasonic packaging has many advantages such as fast packaging speed, less thermal damage and wide applicability, which can significantly improve the quality and efficiency of packaging. However, the existing single-head reciprocating ultrasonic packaging requires the ultrasonic packaging head to retract after each packaging. When packaging again, the ultrasonic packaging head needs to advance to the vicinity of the packaging. In other words, this single-head reciprocating ultrasonic packaging sacrifices the time to retract to the previous package and still has a speed bottleneck. Utility Model Content

[0004] The purpose of this invention is to provide a cam-linkage type ultrasonic end-sealing mechanism for packaging machines, which improves end-sealing efficiency through at least two ultrasonic welding heads.

[0005] The technical solution of this utility model is as follows: A cam-linkage type ultrasonic end-sealing mechanism for a packaging machine includes a frame on which an ultrasonic welding head mechanism and a bottom mold mechanism are arranged vertically. The mechanism further includes: an ultrasonic welding head mechanism comprising a left welding head turntable and a right welding head turntable spaced apart, the left and right welding head turntables being driven synchronously by a turntable drive mechanism; the ultrasonic welding head mechanism also includes at least two ultrasonic welding heads and a welding head mounting beam for mounting the ultrasonic welding heads; the two ends of the welding head mounting beam are connected to the corresponding welding head turntables via corresponding upper cam linkages; the ultrasonic welding head includes an ultrasonic transducer, an amplitude transformer, and a welding part for cooperating with the bottom mold mechanism; the upper cam linkage includes an axis rotatably mounted on the corresponding welding head turntable along the left... A rotating shaft extends to the right, and a mounting arm, perpendicular to the rotating shaft, is fixed on the rotating shaft for mounting the end of the corresponding mounting beam. A posture adjustment cam is fixed at the end of the rotating shaft away from the mounting arm, and a cam shaft is provided at the end of the posture adjustment cam away from the rotating shaft. A left cam disk is fixed on the left welding head turntable, and a right cam disk is fixed on the right welding head turntable. The left and right cam disks are respectively provided with circumferentially closed cam grooves. The cam shaft and the corresponding cam groove guide and move in a circumferential direction. The axis of the ultrasonic transducer extends radially along the turntable. During the circumferential movement of the cam shaft along the cam groove, the ultrasonic transducer has an axis that extends vertically so that the welding part cooperates with the bottom mold mechanism to complete the welding station for sealing the packaging bag end.

[0006] Furthermore, the mounting arm extends radially along the turntable. The left end of the mounting beam is connected to the left mounting arm via the left connecting arm of the beam, and the right end of the mounting beam is connected to the right mounting arm via the right connecting arm of the beam. The mounting beam and the left and right connecting arms of the beam at both ends form a U-shaped structure. The ultrasonic welding head and the welding part are located on opposite sides of the mounting arm.

[0007] Furthermore, the cam groove includes a first arc segment and a second arc segment, which are connected by a transition arc segment. When the cam shaft is in the first arc segment, the axis of the ultrasonic transducer extends radially along the turntable. When the ultrasonic transducer is in the welding position, the cam shaft is located in the second arc segment.

[0008] Furthermore, the bottom mold mechanism includes bottom molds corresponding to the number of ultrasonic welding heads. The mechanism frame is equipped with a left bottom mold turntable and a right bottom mold turntable. The bottom molds are fixed on the bottom mold beam. The two ends of the bottom mold beam are set on the corresponding bottom mold turntables through the lower cam connecting rod. As the bottom molds rotate with the bottom mold turntables, each bottom mold cooperates with the welding part of the welding station in sequence to complete the ultrasonic sealing of the packaging bag.

[0009] Furthermore, the turntable drive mechanism drives the left welding head turntable and the left bottom mold turntable to rotate in opposite directions at the same speed, and the turntable drive mechanism drives the right welding head turntable and the right bottom mold turntable to rotate in opposite directions at the same speed.

[0010] Furthermore, a packaging bag cutter driven by a drive cylinder is also installed on the bottom mold beam.

[0011] The beneficial effects of this technical solution are as follows: During use, the left and right welding head turntables rotate at the same speed and in the same direction. The left and right welding head turntables rotate with the rotating shaft. At the same time, the camshaft on the attitude adjustment cam always cooperates with the cam groove on the corresponding cam plate to guide the movement, thereby controlling the angle of the rotating shaft, that is, controlling the angle of the mounting beam connected to the rotating shaft, and thus controlling the orientation of the ultrasonic welding head on the welding head mounting beam. This makes the axis of the ultrasonic transducer extend radially along the turntable, thereby reducing the vertical height of the ultrasonic welding head mechanism. At least two ultrasonic welding heads achieve sequential encapsulation as the welding head turntable rotates. Compared with single welding head reciprocating movement for encapsulation, unidirectional rotation can achieve faster encapsulation, thereby improving encapsulation efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the cam-linkage type ultrasonic end-sealing mechanism of this utility model; Figure 2 for Figure 1 A structural diagram from another perspective; Figure 3 for Figure 1 A diagram showing the attitude changes of the mounting arm during rotation. Figure 4 yes Figure 3 The attitude diagram of the mounting arm at its lowest position; Figure 5 This is a schematic diagram of the cooperation between the left cam disk and the upper cam connecting rod in this utility model; Figure 6 yes Figure 5 A three-dimensional image; Figure 7 yes Figure 5 A schematic diagram of the structure of the left-side cam disk; Figure 8 yes Figure 7 A three-dimensional image; Figure 9 yes Figure 1 The main view; Figure 10 yes Figure 9 Sectional view along axis AA; Figure 11 yes Figure 9 Usage status diagram; Figure 12 This is a schematic diagram of the fit between the mounting beam and the ultrasonic welding head in this utility model; Figure 13 This is a schematic diagram of the fit between the bottom mold and the bottom mold beam in this utility model; Figure 14 This is a schematic diagram of the structure of Embodiment 2 of the cam-linkage type ultrasonic end-sealing mechanism of this utility model; Figure 15 yes Figure 14 A structural diagram from another perspective; Figure 16 yes Figure 14 The main view; Figure 17 yes Figure 16 Sectional view along axis AA; Figure 18 yes Figure 16 Usage status diagram; Figure 19 This is a schematic diagram of the connection between the planetary gears and the transmission belt in Example 2; In the diagram: 1. Mechanism frame; 2. Right welding head turntable; 3. Ultrasonic welding head mechanism; 4. Welding section; 5. Ultrasonic transducer; 6. Right transmission belt; 7. Right bottom mold turntable; 8. Bottom mold mechanism; 9. Drive motor; 10. Left transmission belt; 11. Left welding head turntable; 12. Mounting arm; 13. Turntable bracket; 14. Wedge block; 15. Left cam plate; 16. Cam groove; 17. Attitude adjustment cam; 18. First arc segment; 19. Second arc segment; 20. Transition segment; 21. 21. Rotating shaft; 22. Left bottom mold turntable; 23. Bottom mold; 24. Left conveying mechanism; 25. Right conveying mechanism; 26. Left conveying trough; 27. Right conveying trough; 28. Planetary gear; 29. ​​Planetary gear transmission belt; 30. Central transmission wheel; 31. Attitude adjustment motor; 32. Central wheel; 33. Left second transmission belt; 34. Right second transmission belt; 35. Mounting beam; 36. Ultrasonic welding head; 37. Left connecting arm of beam; 38. Right connecting arm of beam; 39. Bottom mold beam. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0015] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0016] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0017] An embodiment of the cam-linkage type ultrasonic end-sealing mechanism for a packaging machine according to this utility model is as follows: Figures 1-13 As shown, It includes a frame 1, on which an ultrasonic welding head mechanism 3 and a bottom mold mechanism are arranged vertically. The ultrasonic welding head mechanism includes a welding part 4 and an ultrasonic transducer 5.

[0018] The upper part of the mechanism frame is rotatably equipped with a left welding head turntable and a right welding head turntable 2, whose rotation axis extends in the left-right direction. The left and right welding head turntables 2 are driven synchronously by a turntable drive mechanism. Specifically, the left and right welding head turntables 2 are rotatably mounted on corresponding turntable supports 13. The turntable supports can be adjusted up and down. A wedge block 14 is provided at the bottom of the turntable support. The upper end of the wedge block is a pushing slope. The height of the turntable support can be adjusted by moving the wedge block back and forth. The upper end of the turntable support is positioned by being pushed by a screw. When it is necessary to raise the height of the turntable support, first loosen the screw, then adjust the height of the turntable support, and then tighten the screw.

[0019] The ultrasonic welding head mechanism also includes three ultrasonic welding heads 36 and welding head mounting beams 35 corresponding to each ultrasonic welding head 36. Each ultrasonic welding head 36 is mounted on its corresponding welding head mounting beam 35. In this embodiment, the two ends of the welding head mounting beam are connected to the corresponding welding head turntable via corresponding upper cam connecting rods. The upper cam connecting rod includes a rotating shaft 21 whose axis extends in the left-right direction and is rotatably mounted on the corresponding welding head turntable. Mounting arms 12, which are perpendicular to the rotating shaft and are mounted on the ends of the corresponding mounting beams, are fixed on the rotating shaft 21. The two ends of the welding head mounting beam are fixed to the corresponding mounting arms 12 by bolts.

[0020] An attitude adjustment cam 17 is fixed at the end of the rotating shaft away from the mounting arm 12. The end of the attitude adjustment cam 17 away from the rotating shaft is provided with a camshaft whose axis extends in the left and right direction. A left cam disk 15 is fixed on the left welding head turntable 11, and a right cam disk is fixed on the right welding head turntable 2. The left cam disk 15 and the right cam disk are respectively provided with circumferentially closed cam grooves 16. The camshaft extends into the corresponding cam groove 16. The camshaft and the corresponding cam groove guide and move in a circumferential direction. The axis of the ultrasonic transducer 5 extends radially along the turntable. During the circumferential movement of the camshaft along the cam groove, the ultrasonic transducer 5 has an axis that extends vertically so that the welding part cooperates with the bottom mold mechanism to complete the welding station for sealing the packaging bag end.

[0021] The mounting arm 12 extends radially along the turntable. The left end of the mounting beam is connected to the left mounting arm via the left side connecting arm 37, and the right end of the mounting beam is connected to the right mounting arm via the right side connecting arm 38. The mounting beam 35 and the left side connecting arm 37 and the right side connecting arm 38 at both ends of the beam form a U-shaped structure.

[0022] The cam groove includes a first arc-shaped segment 18 and a second arc-shaped segment 19. The first arc-shaped segment 18 and the second arc-shaped segment 19 are connected by a transition arc-shaped segment 20. One end of the transition arc-shaped segment 20 is connected to the lower end of the first arc-shaped segment 18, and the other end of the transition arc-shaped segment 20 is connected to the lower end of the second arc-shaped segment 19. When the camshaft is in the first arc-shaped segment, the axis of the ultrasonic transducer extends radially along the turntable. When the ultrasonic transducer is in the welding position, the camshaft is located in the second arc-shaped segment. Figure 5 As shown, the length extension direction of the mounting arm 12 is consistent with the axial extension direction of the ultrasonic transducer. Figure 5In a clockwise direction, the camshafts connected to the two upper mounting arms mate with the first arc segment 18. The first arc segment has the same radius. The extension direction of the mounting arm, i.e. the extension direction of the axis of the ultrasonic transducer, is consistent with the radial direction of the left welding head turntable. As the mounting arm rotates clockwise with the left welding head turntable, the camshaft connected to the mounting arm enters the transition arc segment 20. After the position of the mounting arm is raised, it is lowered again, so that the mounting arm carrying the ultrasonic transducer can move downward in a vertical posture and dock with the corresponding bottom mold, thereby completing the ultrasonic sealing of the packaging bag.

[0023] The bottom mold mechanism includes bottom molds 23 corresponding to the number of ultrasonic welding heads. A left bottom mold turntable 22 and a right bottom mold turntable 7 are mounted on the mechanism frame. The bottom molds 23 are fixed to the bottom mold beam 39. Both ends of the bottom mold beam 39 are mounted on the corresponding bottom mold turntables via lower cam connecting rods. As the bottom molds rotate with the turntables, each bottom mold sequentially engages with the welding section of the welding station to complete the ultrasonic sealing of the packaging bag. The turntable drive mechanism drives the left welding head turntable and the left bottom mold turntable to rotate in opposite directions at the same speed, and the turntable drive mechanism drives the right welding head turntable and the right bottom mold turntable to rotate in opposite directions at the same speed. A packaging bag cutter driven by a drive cylinder is also mounted on the bottom mold beam. After the packaging bag is sealed, the drive cylinder drives the packaging bag cutter upwards to cut the packaging bag. A cutter groove is located in the middle of the bottom mold, and the packaging bag cutter is positioned within the cutter groove.

[0024] In this embodiment, the lower cam link is configured in the same way as the upper cam link, and will not be described in detail here.

[0025] In this embodiment, the turntable drive mechanism drives the left welding head turntable and the left bottom mold turntable to rotate in opposite directions at the same speed, and the turntable drive mechanism drives the right welding head turntable and the right bottom mold turntable to rotate in opposite directions at the same speed.

[0026] The turntable drive mechanism includes a drive motor 9. The left welding head turntable 11 and the left bottom mold turntable 22 are connected by a left transmission belt 10, and the right welding head turntable 2 and the right bottom mold turntable 7 are connected by a right transmission belt 6. The mechanism frame is equipped with reversing wheels for the left and right transmission belts 10 and 6 to rotate around and change direction. The output end of the drive motor is connected to a drive shaft whose rotation axis extends in the left-right direction. The left and right transmission belts are connected to the pulleys at both ends of the drive shaft.

[0027] In use, the left and right welding head turntables rotate at the same speed and in the same direction, the left and right bottom mold turntables rotate at the same speed and in the same direction, and the left welding head turntable and left bottom mold turntable rotate in opposite directions at the same speed. To address the issue of the long axial length of the ultrasonic transducer, in this embodiment, the main structure of the ultrasonic transducer 5 and the ultrasonic welding head extends radially along the welding head turntable by the movement of the camshaft along the corresponding cam groove. This saves the overall height space of the machine. In addition, it can also adapt to end sealing of products with shorter package lengths. The shorter the package length, the shorter the ultrasonic arm. However, the total length of the amplitude transformer and transducer of current ultrasonic manufacturers is limited. As the camshaft moves from the transition arc segment 20 to the first arc segment 17, the welding part of the ultrasonic welding head at the lowest position moves downward, and the bottom mold 23 at the highest position moves upward. The welding part cooperates with the bottom mold to clamp the packaging bag between them, thereby completing the ultrasonic welding seal. Then, the packaging bag cutter on the bottom mold moves upward to complete the cutting of the packaging bag. In other embodiments of this utility model, the packaging bag cutter may be omitted. In this case, the packaging bags are sealed at the end to form a series of packaging bags, which are then cut at other workstations.

[0028] The packaging machine of this invention uses a cam-linkage type ultrasonic end-sealing mechanism in conjunction with a packaging bag conveying mechanism, such as... Figure 11 As shown, the packaging bag conveying mechanism includes a left conveying mechanism 24 and a right conveying mechanism 25 capable of relatively cyclical operation. The left conveying mechanism includes multiple left conveying grooves 26 spaced apart circumferentially; the right conveying mechanism includes multiple right conveying grooves 27 spaced apart circumferentially. Each left conveying groove 26 is used in conjunction with its corresponding right conveying groove 27 to clamp the packaging bag and convey it in the front-back direction to the cam-linkage ultrasonic end-sealing mechanism of the packaging machine to complete the ultrasonic end-sealing of the packaging bag. In this utility model, the welding head turntable and the bottom mold turntable rotate in one direction, and each ultrasonic welding head sequentially completes the sealing of the corresponding part of the packaging bag. Compared with the reciprocating movement of a single welding head to achieve packaging segment sealing, it can significantly improve the sealing efficiency.

[0029] Example 2 of a cam-linkage type ultrasonic end-sealing mechanism for a packaging machine Figures 14-19 As shown, the difference between Embodiment 2 and Embodiment 1 is that the bottom mold mechanism in this embodiment is different from the bottom mold mechanism in Embodiment 1.

[0030] In this embodiment, the bottom mold mechanism includes a bottom mold corresponding to the number of ultrasonic welding heads. Planetary gears 28 corresponding to the number of bottom molds are rotatably arranged on the left bottom mold turntable and the right bottom mold turntable 7. The bottom mold is installed on the bottom mold crossbeam, and the two ends of the bottom mold crossbeam are connected to the corresponding planetary gears 28. The planetary gears of the same bottom mold turntable are connected to each other through the planetary gear transmission belt 29. The bottom mold has a bottom mold mating surface that mates with the corresponding welding head. During the rotation of the bottom mold with the left bottom mold turntable and the right bottom mold turntable, the bottom mold mating surface faces upward.

[0031] A central wheel 32 is rotatably mounted on the center of the left and right bottom mold turntables. The central wheel 32 is connected to the corresponding planetary gears by a transmission belt 29. A transmission wheel 30 is fixed coaxially on the central wheel 32. The attitude adjustment mechanism is connected to the central wheel on the left bottom mold turntable via the left second transmission belt 33 and the left transmission wheel. The attitude adjustment mechanism is also connected to the central wheel on the right bottom mold turntable 7 via the right second transmission belt 34 and the right central wheel.

[0032] In this embodiment, the attitude adjustment mechanism includes an attitude adjustment motor 31, which is connected to the left second transmission belt 33 and the right second transmission belt 34 via a transmission shaft.

[0033] In normal operation, the output shaft of the attitude adjustment motor 31 is locked, and the planetary gears are driven by the central gear with the same number of teeth. The bottom mold always maintains a vertical posture. The ultrasonic welding head, rotated to the lowest position, cooperates with the bottom mold to complete the end sealing of the packaging bag. As the packaging bag continues to be conveyed, each ultrasonic welding head rotates in sequence to complete the ultrasonic sealing of the corresponding packaging bag. The rotation direction of the left and right welding head turntables is consistent and continuous, which can improve the sealing efficiency. That is to say, in Example 1, the bottom mold achieves attitude assurance through a cam linkage, while in Example 2, the bottom mold achieves attitude assurance through a planetary differential gear system.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A cam link type ultrasonic end sealing mechanism for a packaging machine, comprising a mechanism frame, an ultrasonic horn mechanism and a bottom die mechanism arranged on the mechanism frame in an up-down arrangement, characterized in that, Also includes: The ultrasonic welding head mechanism includes a left welding head turntable and a right welding head turntable spaced apart on the left and right sides. The left and right welding head turntables are driven synchronously by a turntable drive mechanism. The ultrasonic welding head mechanism also includes at least two ultrasonic welding heads and a welding head mounting beam for mounting the ultrasonic welding heads. The two ends of the welding head mounting beam are connected to the corresponding welding head turntables via corresponding upper cam connecting rods. The ultrasonic welding head includes an ultrasonic transducer and a welding part for cooperating with the bottom mold mechanism. The upper cam connecting rod includes a rotating shaft whose axis extends in the left-right direction and is rotatably mounted on the corresponding welding head turntable. A welding part is fixed on the rotating shaft and is perpendicular to the rotating shaft for mounting the corresponding welding head turntable. The mounting arm is installed at the end of the mounting beam. A posture adjustment cam is fixed at the end of the rotating shaft away from the mounting arm. A cam shaft is provided at the end of the posture adjustment cam away from the rotating shaft. A left cam disk is fixed on the left welding head turntable, and a right cam disk is fixed on the right welding head turntable. The left and right cam disks are respectively provided with circumferentially closed cam grooves. The cam shaft and the corresponding cam groove guide and move in a circumferential direction. The axis of the ultrasonic transducer extends radially along the turntable. During the circumferential movement of the cam shaft along the cam groove, the ultrasonic transducer has an axis that extends vertically so that the welding part cooperates with the bottom mold mechanism to complete the welding station for sealing the packaging bag end.

2. The ultrasonic end seal mechanism of claim 1, wherein: The mounting arm extends radially along the turntable. The left end of the mounting beam is connected to the left mounting arm via the left connecting arm of the beam, and the right end of the mounting beam is connected to the right mounting arm via the right connecting arm of the beam. The mounting beam and the left and right connecting arms of the beam at both ends form a U-shaped structure. The ultrasonic welding head and the welding part are located on opposite sides of the mounting arm.

3. The ultrasonic end seal mechanism of claim 1, wherein: The cam groove includes a first arc segment and a second arc segment. The first arc segment and the second arc segment are connected by a transition arc segment. When the cam shaft is in the first arc segment, the axis of the ultrasonic transducer extends radially along the turntable. When the ultrasonic transducer is in the welding position, the cam shaft is located in the second arc segment.

4. The ultrasonic end seal mechanism of any of claims 1-3, wherein: The bottom mold mechanism includes bottom molds corresponding to the number of ultrasonic welding heads. The mechanism frame is equipped with a left bottom mold turntable and a right bottom mold turntable. The bottom molds are fixed on the bottom mold beam. The two ends of the bottom mold beam are set on the corresponding bottom mold turntables through the lower cam connecting rod. As the bottom molds rotate with the bottom mold turntables, each bottom mold cooperates with the welding part of the welding station in sequence to complete the ultrasonic sealing of the packaging bag.

5. The ultrasonic end seal mechanism of claim 4, wherein: The turntable drive mechanism drives the left welding head turntable and the left bottom mold turntable to rotate in opposite directions at the same speed, and the turntable drive mechanism drives the right welding head turntable and the right bottom mold turntable to rotate in opposite directions at the same speed.

6. The ultrasonic end seal mechanism of claim 4, wherein: The bottom mold beam is also equipped with a packaging bag cutter driven by a drive cylinder.

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