Packaging barrel sealing machine

Abstract

A packaging barrel sealing machine comprises a rack, a packaging barrel conveying device, a packaging barrel adding device, a film sucking and releasing device, a heat sealing device, a packaging barrel gland device and a packaging barrel withdrawing device, and is characterized in that the film sucking and releasing device comprises a film sucking and releasing assembly and a film sucking and releasing assembly height adjusting mechanism; the heat sealing device comprises at least one heat sealing head and a heat sealing head height adjusting mechanism; the packaging barrel cover pressing device comprises at least one cover pressing head and a cover pressing head height adjusting mechanism. The packaging barrel sealing machine further comprises an input device and a control circuit, the input device is electrically connected with the corresponding input end of the control circuit, and the film sucking and releasing assembly height adjusting mechanism, the heat sealing head height adjusting mechanism and the cover pressing head height adjusting mechanism are electrically connected with the corresponding output end of the control circuit. According to the utility model, the movement range of related parts in the film absorbing and releasing device, the heat sealing device and the packaging barrel gland device in the height direction can be quickly adjusted according to the height of the packaging barrel, so that the movement range is matched with the height of the packaging barrel.

Description

Technical Field

[0001] The utility model relates to a packaging machine, in particular to a packaging tube sealing machine. Background Art

[0002] At present, the cylindrical cans used for packaging crispy foods such as potato chips generally include a packaging tube, a bottom cover, a sealing film and a top cover. The packaging tube has a bottom opening and a top opening. The bottom cover seals the bottom opening of the packaging tube (the bottom cover is usually made of metal material), the sealing film seals the top opening of the packaging tube, and the top cover is buckled on the top opening to cover the outer edge of the sealing film and the top opening. In production, the sealing film is usually first sealed on the top opening of the packaging tube, and then the top cover is buckled on the top opening to close the top opening of the packaging tube, and then the material (such as crispy foods such as potato chips) is filled into the cavity of the packaging tube, and then the bottom cover is installed to seal the bottom opening of the packaging tube.

[0003] The existing packaging tube sealing machine for installing sealing film and top cover includes a frame, a packaging tube conveying device, a packaging tube adding device, a film suction and release device, a heat sealing device, a packaging tube capping device and a packaging tube exiting device. The packaging tube conveying device, the packaging tube adding device, the film suction and release device, the heat sealing device, the packaging tube capping device and the packaging tube exiting device are all installed on the frame, and the packaging tube adding device, the film suction and release device, the heat sealing device, the packaging tube capping device and the packaging tube exiting device are arranged in sequence from front to back along the conveying direction of the packaging tube conveying device.

[0004] Since different packaging tubes usually have different heights, and the film suction and release device, heat sealing device, packaging tube capping device and other devices are operated at the top of the packaging tube during production, it is necessary to adjust the range of motion of the film suction and release device, heat sealing device, and packaging tube capping device in the height direction according to the height of the packaging tube before production to match the height of the packaging tube. At present, when the packaging tube sealing machine needs to be used for the installation of sealing film and top cover of a packaging tube of another height, the staff needs to adjust and calibrate the overall height position of the film suction and release device, heat sealing device, and packaging tube capping device one by one, or adjust and calibrate the height position of its related components. The operation is relatively cumbersome, time-consuming and labor-intensive, and the work efficiency is low, which affects the normal production. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a packaging tube sealing machine, which can be suitable for the installation of sealing films and top covers of packaging tubes of various heights, and can quickly adjust the range of movement of relevant components in the film suction and release device, heat sealing device, and packaging tube capping device in the height direction according to the height of the packaging tube, so that it matches the height of the packaging tube, which is conducive to improving work efficiency. The technical solution adopted is as follows:

[0006] A packaging tube sealing machine comprises a frame, a packaging tube conveying device, a packaging tube adding device, a film suction and release device, a heat sealing device, a packaging tube capping device and a packaging tube exiting device, wherein the packaging tube conveying device is installed on the frame, and the packaging tube adding device, the film suction and release device, the heat sealing device, the packaging tube capping device and the packaging tube exiting device are arranged in sequence from front to back along the conveying direction of the packaging tube conveying device, and is characterized in that: the film suction and release device comprises a film suction and release assembly and a film suction and release assembly height adjustment mechanism capable of adjusting the movable range of the film suction and release assembly in the height direction; the heat sealing device comprises at least one heat sealing head and a heat sealing head height adjustment mechanism capable of adjusting the movable range of the heat sealing head in the height direction; the packaging tube capping device comprises at least one capping head and a capping head height adjustment mechanism capable of adjusting the movable range of the capping head in the height direction; the packaging tube sealing machine also comprises an input device and a control circuit, the input device is electrically connected to the corresponding input end of the control circuit, and the film suction and release assembly height adjustment mechanism, the heat sealing head height adjustment mechanism and the capping head height adjustment mechanism are electrically connected to the corresponding output end of the control circuit respectively.

[0007] The above-mentioned film suction and release assembly is a structure that can absorb and release the sealing film; the above-mentioned heat sealing head is a structure that can heat the sealing film to make it seal on the top opening of the packaging tube; the above-mentioned pressing head is a structure that can apply downward pressure to the top cover to make it buckle onto the top opening of the packaging tube.

[0008] When the packaging tube sealing machine of the utility model is working, the packaging tube adding device places the packaging tube on the packaging tube conveying device, and then the packaging tube conveying device conveys the packaging tube to the film suction and release device and the heat sealing device in sequence, and the sealing film is placed on the top opening of the packaging tube by the film suction and release device, and then the sealing film is heat-sealed on the top opening of the packaging tube by the heat-sealing head in the heat-sealing device; then, the packaging tube conveying device conveys the packaging tube to a position corresponding to the packaging tube capping device, and the capping head in the packaging tube capping device buckles the top cover onto the top opening of the packaging tube; finally, the packaging tube withdrawing device withdraws the packaging tube with the sealing film and the top cover installed from the packaging tube conveying device.

[0009] When the packaging tube sealing machine needs to be used for the installation of sealing film and top cover of a packaging tube of another height, after inputting or selecting a new packaging tube height value on the input device, the input device transmits the packaging tube height value information to the control circuit; after processing by the control circuit, a control signal is sent to the suction and release film assembly height adjustment mechanism, the heat sealing head height adjustment mechanism, and the pressure head height adjustment mechanism to operate, and the suction and release film assembly, the heat sealing head, and the pressure head are adjusted or reset in the height direction. The activity range is matched with the height of the new packaging tube, and then the packaging tube sealing machine can be produced normally. The above control circuit can be preset with a matching data table between various packaging tube heights and the activity range of each related component in the height direction. When in use, only the height data of the packaging tube needs to be input, and the control circuit can retrieve the corresponding matching data according to the matching data table to adjust or reset the activity range of each related component in the height direction.

[0010] The input device may be a touch screen, which can be used to input data (such as the height of the packaging tube) and display the operating data of the packaging tube sealing machine.

[0011] In a preferred embodiment, the height adjustment mechanism of the suction and release film assembly includes a first lifting platform and at least one first servo lifting unit; the first servo lifting unit includes a first servo motor and a first lifting transmission mechanism, the first servo motor is electrically connected to the output end corresponding to the control circuit, the power output shaft of the first servo motor is transmission-connected to the power input end of the first lifting transmission mechanism; the power output end of the first lifting transmission mechanism is connected to the first lifting platform; the suction and release film assembly is installed on the first lifting platform. Multiple first servo lifting units can share one first servo motor, or they can be respectively equipped with one first servo motor. When the packaging tube sealing machine needs to be used for the installation of the sealing film and top cover of the packaging tube of another height, after inputting or selecting the new packaging tube height value on the input device (such as a touch screen), the input device transmits the packaging tube height value information to the control circuit; after the control circuit processes, it sends a control signal to drive the power output shaft of each first servo motor to rotate forward or reverse by a corresponding number of revolutions; each first servo motor then drives the first lifting platform and the suction and release film assembly to rise or fall by a corresponding distance through the first lifting transmission mechanism, so that the initial height position of the suction and release film assembly matches the new packaging tube height, so that the activity range of the suction and release film assembly in the height direction matches the new packaging tube height. The above control circuit can be preset with a matching data table between various packaging tube heights and the first servo motor. When in use, only the height data of the packaging tube needs to be input, and the control circuit can control the power output shaft of the first servo motor to rotate forward or reverse by a corresponding number of revolutions according to the matching data table.

[0012] Typically, the above-mentioned suction and release membrane assembly height adjustment mechanism also includes multiple first guide pillars, each of which is arranged in the vertical direction; a plurality of first guide sleeves are provided on the first lifting platform, the number of first guide sleeves is the same as that of the first guide pillars and they correspond one to one, the first guide sleeves are sleeved on the corresponding first guide pillars and can be lifted and lowered along the first guide pillars.

[0013] The above-mentioned film suction and placement assembly usually includes at least one suction cup and a suction cup position switching mechanism capable of switching the positions of the suction cups. The suction cup position switching mechanism switches the position of the suction cup between the sealing film storage device and the top of the packaging tube. After the suction cup sucks the sealing film from the sealing film storage device, the suction cup position switching mechanism sends the suction cup and the sealing film thereon to the top of the packaging tube, and places the sealing film on the opening at the top of the packaging tube.

[0014] In the preferred embodiment, the heat sealing head height adjustment mechanism includes a second lifting platform and at least one second servo lifting unit; the second servo lifting unit includes a second servo motor and a second lifting transmission mechanism, the second servo motor is electrically connected to the corresponding output end of the control circuit, and the power output shaft of the second servo motor is transmission-connected to the power input end of the second lifting transmission mechanism; the power output end of the second lifting transmission mechanism is connected to the second lifting platform; the heat sealing head is installed on the second lifting platform. Multiple second servo lifting units can share a second servo motor, or they can be configured with a second servo motor respectively. When the packaging tube sealing machine needs to be used for the installation of the sealing film and the top cover of the packaging tube of another height, after inputting or selecting a new packaging tube height value on the input device (such as a touch screen), the input device transmits the packaging tube height value information to the control circuit; after the control circuit processes, it sends a control signal to drive the power output shaft of each second servo motor to rotate forward or reverse for a corresponding number of revolutions; each second servo motor then drives the second lifting platform and the heat sealing head to rise or fall by a corresponding distance through the second lifting transmission mechanism, so that the initial height position of the heat sealing head matches the new packaging tube height, so that the activity range of the heat sealing head in the height direction matches the new packaging tube height. The above control circuit may be preset with a matching data table between various packaging tube heights and the second servo motor. When in use, only the height data of the packaging tube needs to be input, and the control circuit can control the power output shaft of the second servo motor to rotate forward or reverse the corresponding number of times according to the matching data table.

[0015] Typically, the above-mentioned heat sealing head height adjustment mechanism also includes multiple second guide pillars, each of which is arranged in the vertical direction; a plurality of second guide sleeves are provided on the second lifting platform, the number of second guide sleeves is the same as that of the second guide pillars and they correspond one to one, and the second guide sleeves are sleeved on the corresponding second guide pillars and can be lifted and lowered along the second guide pillars.

[0016] The above-mentioned heat sealing head usually includes a heating plate and a heating plate lifting mechanism capable of driving the heating plate to rise and fall. The heating plate is provided with a heating component (such as an electric heating component). When the packaging tube with a sealing film placed on the top opening reaches under the heat sealing head, the heating plate lifting mechanism drives the heating plate to descend and press the sealing film. The heating plate heats the sealing film and completes the heat sealing. After the heat sealing is completed, the heating plate lifting mechanism drives the heating plate to rise and reset.

[0017] The first lifting transmission mechanism and the second lifting transmission mechanism may both adopt a structure similar to a screw jack, or other transmission mechanisms may be adopted.

[0018] In a specific solution, the first lifting transmission mechanism includes a first housing, a first power input shaft, a first transmission gear set, a first power output shaft, a first lifting screw and a first lifting component. The first transmission gear set is installed in the first housing, the first power input shaft is rotatably installed on the first housing in the horizontal direction, the first power output shaft is rotatably installed on the first housing in the vertical direction, the first gear of the first transmission gear set is installed on the first power input shaft, the final gear of the first transmission gear set is installed on the first power output shaft, the lower end of the first lifting screw is connected to the upper end of the first power output shaft through a first coupling; the first lifting component is provided with a first screw hole that is screwed with the first lifting screw, the first lifting component constitutes the power output end of the first lifting transmission mechanism, and the first lifting component is installed on the first lifting platform. The first power input shaft of the first lifting transmission mechanism is connected to the power output shaft of the first servo motor by transmission, for example, by a coupling. In addition, a first base can be provided below the first housing, and the first housing is fixedly mounted on the first base.

[0019] In a specific solution, the second lifting transmission mechanism includes a second housing, a second power input shaft, a second transmission gear set, a second power output shaft, a second lifting screw and a second lifting component. The second transmission gear set is installed in the second housing, the second power input shaft is rotatably installed on the second housing in the horizontal direction, the second power output shaft is rotatably installed on the second housing in the vertical direction, the first gear of the second transmission gear set is installed on the second power input shaft, the final gear of the second transmission gear set is installed on the second power output shaft, the lower end of the second lifting screw is connected to the upper end of the second power output shaft through a second coupling; a second screw hole that is screwed with the second lifting screw is provided in the second lifting component, the second lifting component constitutes the power output end of the second lifting transmission mechanism, and the second lifting component is installed on the second lifting platform. The second power input shaft of the second lifting transmission mechanism is connected to the power output shaft of the second servo motor by transmission, for example, by a coupling. In addition, a base can be provided below the second housing, and the second housing is fixedly mounted on the second base.

[0020] In the preferred embodiment, the capping head height adjustment mechanism includes a third lifting platform and a third servo lifting mechanism capable of driving the third lifting platform to lift and lower. The third servo lifting mechanism includes a third servo motor and a third lifting transmission mechanism. The third servo motor is electrically connected to the corresponding output end of the control circuit. The power output shaft of the third servo motor is transmission-connected to the power input end of the third lifting transmission mechanism. The power output end of the third lifting transmission mechanism is connected to the third lifting platform. The capping head is installed on the third lifting platform. When the packaging tube sealing machine needs to be used for the installation of the sealing film and the top cover of the packaging tube of another height, after inputting or selecting a new packaging tube height value on the input device (such as a touch screen), the input device transmits the packaging tube height value information to the control circuit. After processing by the control circuit, a control signal is sent to drive the power output shaft of the third servo motor to rotate forward or reversely by a corresponding number of revolutions. The third servo motor then drives the third lifting platform and the capping head to rise or fall by a corresponding distance through the third lifting transmission mechanism, so that the initial height position of the capping head matches the new packaging tube height, thereby matching the activity range of the capping head in the height direction with the new packaging tube height. Alternatively, when the packaging tube sealing machine needs to be used for the installation of the top cover of a packaging tube of another height, after inputting or selecting a new packaging tube height value on an input device (such as a touch screen), the input device transmits the packaging tube height value information to the control circuit; after processing by the control circuit, the number of forward and reverse rotations of the third servo motor is adjusted to adjust the range of motion of the third lifting platform and the capping head in the height direction to match the height of the packaging tube. The above control circuit may be preset with a matching data table between various packaging tube heights and the third servo motor. When in use, only the height data of the packaging tube needs to be input, and the control circuit can control the power output shaft of the second servo motor to rotate forward or reverse at a corresponding number of revolutions according to the matching data table.

[0021] The capping head height adjustment mechanism may adopt the same structure as the suction and release film assembly height adjustment mechanism and the heat sealing head height adjustment mechanism, or may adopt other structures.

[0022] In a more preferred solution, the third lifting transmission mechanism includes a horizontal rotating shaft, a left crank, a left connecting rod, a right crank, a right connecting rod, a plurality of guide columns and a plurality of guide sleeves; each guide column is fixedly mounted on the frame and is oriented up and down, each guide sleeve is fixedly mounted on the third lifting platform, the number of guide sleeves is the same as that of the guide columns and they correspond one to one, the guide sleeves are sleeved on the guide columns and can move up and down along the guide columns; the horizontal rotating shaft is rotatably mounted on the frame and is oriented left and right, the power output shaft of the third servo motor is transmission-connected to the horizontal rotating shaft, one end of the left crank is fixedly connected to the left end of the horizontal rotating shaft, the other end of the left crank is hinged to the upper end of the left connecting rod, the lower end of the left connecting rod is hinged to the third lifting platform, one end of the right crank is fixedly connected to the right end of the horizontal rotating shaft, the other end of the right crank is hinged to the upper end of the right connecting rod, and the lower end of the right connecting rod is hinged to the third lifting platform. Usually, the left crank and the right crank are parallel to each other, and the left connecting rod and the right connecting rod are parallel to each other. When the third servo motor is running, its power output shaft drives the horizontal shaft to rotate forward or reverse, and the horizontal shaft drives the left crank and the right crank to swing back and forth at a certain angle around the horizontal shaft; the left crank and the right crank drive the third lifting platform and each guide sleeve to lift and lower a certain distance along the guide column through the left connecting rod and the right connecting rod respectively. The third servo motor is used as the power source of the lifting mechanism to facilitate the accurate control of the stroke of the third lifting platform. When the packaging tube sealing machine needs to be used for the installation of the top cover of the packaging tube of another height, it is only necessary to adjust the number of forward and reverse rotations of the third servo motor and change the angle of the reciprocating swing of the left crank and the right crank around the horizontal shaft to adjust the lifting stroke of the third lifting platform and the capping head to match the height of the packaging tube. Setting two left and right sets of cranks and connecting rods can make the force on the third lifting platform more balanced.

[0023] In another more preferred solution, the third lifting transmission mechanism includes a horizontal shaft, a crank, a connecting rod, a plurality of guide columns and a plurality of guide sleeves; each guide column is fixedly mounted on the frame and moves up and down, each guide sleeve is fixedly mounted on the third lifting platform, the number of guide sleeves and guide columns is the same and one-to-one, the guide sleeve is sleeved on the guide column and can move up and down along the guide column; the horizontal shaft is rotatably mounted on the frame and moves left and right, the power output shaft of the third servo motor is connected to the horizontal shaft, one end of the crank is connected to the horizontal shaft, the other end of the crank is hinged to the upper end of the connecting rod, and the lower end of the connecting rod is hinged to the third lifting platform. The third servo motor is used as the power source of the lifting mechanism to facilitate the accurate control of the stroke of the third lifting platform. When the packaging tube sealing machine needs to be used for the top cover installation of a packaging tube of another height, it only needs to adjust the number of forward and reverse rotations of the third servo motor and change the angle of the reciprocating swing of the left crank and the right crank around the horizontal shaft to adjust the lifting stroke of the third lifting platform and the capping head to match the height of the packaging tube.

[0024] In order to simplify the structure of the whole machine, it is preferred to use the same capping head to realize the sucking and capping operations. In a specific scheme, the above-mentioned packaging tube capping device also includes a capping head mounting plate and a capping head mounting plate translation mechanism that can drive the capping head mounting plate to reciprocate and translate, and the capping head mounting plate translation mechanism is installed on the third lifting platform; the capping head includes a capping and capping cylinder, a suction cup seat, a suction cup and a capping component, the capping and capping cylinder is a double-headed cylinder, the cylinder body of the capping and capping cylinder is installed on the capping head mounting plate and is in an up-and-down direction, the piston rod of the capping and capping cylinder is provided with a first gas channel, the suction cup seat and the capping component are both installed at the lower end of the piston rod of the capping and capping cylinder, the suction cup seat and the capping component are installed on the suction cup seat, and the suction cup seat is provided with a second gas channel, the second gas channel connects the cavity of the suction cup with the lower end of the first gas channel, and the capping component is on the outside of the suction cup. When the third servo lifting mechanism drives the third lifting platform to rise and fall, the capping head mounting plate translation mechanism, the capping head mounting plate and the capping head rise and fall together with the third lifting platform. The upper end of the first gas channel is used to connect with the vacuum pumping device, and the vacuum pumping device can evacuate the cavity of the suction cup through the first gas channel and the second gas channel. When performing the capping work, the capping head mounting plate translation mechanism drives the capping head mounting plate and the capping head to translate to the top of the cap storage mechanism, and then the suction capping cylinder drives the suction cup to descend, so that the suction cup contacts the upper surface of the top cover, the cavity of the suction cup is evacuated, the suction cup wall is deformed and close to the top cover, and the top cover is sucked; then the suction capping cylinder drives the suction cup to rise and take out the top cover from the cap storage mechanism; then the capping head mounting plate translation mechanism drives the capping head mounting plate, the capping head and the top cover to translate together, so that the capping head and the top cover reach the top of the packaging tube together; then the third servo lifting mechanism drives the third lifting platform to descend, and the capping head mounting plate, the capping head and the top cover descend together with the third lifting platform; after the top cover is aligned with the top of the packaging tube, the suction capping cylinder drives the suction cup to rise and take out the top cover from the packaging tube; The capping cylinder drives the capping component, the suction cup and the top cover thereon to descend, and the capping component presses down the corresponding top cover so that the top cover is buckled on the top of the corresponding packaging tube, thereby completing the installation of the top cover, and then the air flows through the first air flow channel and the second air flow channel into the cavity of the suction cup to release the vacuum suction of the suction cup on the top cover; or, after the top cover is aligned with the top of the packaging tube, the air flows through the first air flow channel and the second air flow channel into the cavity of the suction cup to release the vacuum suction of the suction cup on the top cover, and the top cover is released and overlapped on the top opening of the packaging tube, and then the suction capping cylinder drives the capping component to descend, and the capping component presses down the corresponding top cover so that the top cover is buckled on the top of the corresponding packaging tube, thereby completing the installation of the top cover. After completing the installation of the top cover, the suction capping cylinder can drive the capping component to rise and reset, and the third servo lifting mechanism drives the third lifting platform, the capping head mounting plate, and the capping head to rise and reset together, completing a round of suction capping action.

[0025] In addition, when it is not necessary to use the same capping head to realize the capping and capping operations (for example, a capping and placing mechanism is used to realize the taking and placing of the top cap, and a packaging tube capping device is used to perform the capping operation), the packaging tube capping device can adopt other specific structures, for example: the capping head is directly installed on the third lifting platform. In this case, the capping head includes a capping component, and the capping component is fixedly installed on the third lifting platform; or the capping head includes a capping cylinder and a capping component, the cylinder body of the capping cylinder is installed on the third lifting platform and is in an up-and-down direction, and the capping component is installed at the lower end of the piston rod of the capping cylinder.

[0026] The above-mentioned packaging tube conveying device, packaging tube adding device, suction and release film assembly, heat sealing head, and packaging tube exiting device can all adopt existing technologies. Usually, the above-mentioned packaging tube conveying device includes an annular conveyor belt (the annular conveyor belt can be replaced by an annular chain) and multiple templates installed on the annular conveyor belt. Each template is arranged at equal intervals on the annular conveyor belt. The template is provided with multiple packaging tube positioning blocks. The opening at the lower end of the packaging tube can be sleeved on the packaging tube positioning block to realize the positioning of the packaging tube. The packaging tube adding device and the packaging tube exiting device can adopt a robot, which can clamp the packaging tube, transfer it from one position and place it to another position.

[0027] The utility model can be applicable to the installation of sealing films and top covers of packaging tubes of various heights, and can quickly adjust the movable range of relevant components in the film suction and release device, the heat sealing device and the packaging tube capping device in the height direction according to the height of the packaging tube, so as to match the height of the packaging tube, which is beneficial to improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the utility model;

[0029] Figure 2 yes Figure 1 A top view of the packaging tube sealing machine shown;

[0030] Figure 3 It is a structural schematic diagram of the height adjustment mechanism of the suction and discharge film assembly in the preferred embodiment of the utility model;

[0031] Figure 4 It is a structural schematic diagram of the heat sealing head height adjustment mechanism in the preferred embodiment of the utility model;

[0032] Figure 5 It is a structural schematic diagram of the packaging tube capping device in the preferred embodiment of the utility model;

[0033] Figure 6 yes Figure 5 A left side view of the packaging tube capping device shown;

[0034] Figure 7yes Figure 5 A top view of the packaging tube capping device shown;

[0035] Figure 8 It is a structural schematic diagram of the capping head in the preferred embodiment of the utility model. DETAILED DESCRIPTION

[0036] refer to Figure 1 and Figure 2 The packaging tube sealing machine comprises a frame 1, a packaging tube conveying device 2, a packaging tube adding device 3, a film suction and release device 4, a heat sealing device 5, a packaging tube capping device 6 and a packaging tube exiting device 7. The packaging tube conveying device 2 is installed on the frame 1, and the packaging tube adding device 3, the film suction and release device 4, the heat sealing device 5, the packaging tube capping device 6 and the packaging tube exiting device 7 are arranged in sequence from front to back along the conveying direction of the packaging tube conveying device 2. The suction and release film device 4 includes a suction and release film assembly 41 and a suction and release film assembly height adjustment mechanism 42 capable of adjusting the movable range of the suction and release film assembly 41 in the height direction; the heat sealing device 5 includes at least one heat sealing head 51 and a heat sealing head height adjustment mechanism 52 capable of adjusting the movable range of the heat sealing head 51 in the height direction; the packaging tube capping device 6 includes at least one capping head 61 and a capping head height adjustment mechanism 62 capable of adjusting the movable range of the capping head in the height direction; the packaging tube sealing machine also includes an input device and a control circuit, the input device is electrically connected to the corresponding input end of the control circuit, and the suction and release film assembly height adjustment mechanism 42, the heat sealing head height adjustment mechanism 52, and the capping head height adjustment mechanism 62 are respectively electrically connected to the corresponding output ends of the control circuit.

[0037] In this embodiment, the input device is a touch screen. In addition to being used to input data (such as the height of the packaging tube), the touch screen can also display the operating data of the packaging tube sealing machine.

[0038] The packaging tube sealing machine of this embodiment includes two heat sealing devices 5, which heat-seal the sealing film in two steps.

[0039] refer to Figure 3In this embodiment, the film suction and release assembly height adjustment mechanism 42 includes a first lifting platform 421 and at least one first servo lifting unit; the first servo lifting unit includes a first servo motor 422 and a first lifting transmission mechanism, the first servo motor 422 is electrically connected to the corresponding output end of the control circuit, the power output shaft of the first servo motor 422 is transmission-connected to the power input end of the first lifting transmission mechanism; the power output end of the first lifting transmission mechanism is connected to the first lifting platform 421; the film suction and release assembly 41 is installed on the first lifting platform 421. Multiple first servo lifting units can share one first servo motor, or they can be respectively configured with one first servo motor. The first lifting transmission mechanism includes a first housing 423, a first power input shaft 424, a first transmission gear set, a first power output shaft 425, a first lifting screw 426 and a first lifting component 427. The first transmission gear set is installed in the first housing 423, the first power input shaft 424 is rotatably installed on the first housing 423 along the horizontal direction, the first power output shaft 425 is rotatably installed on the first housing 423 along the vertical direction, the first-stage gear of the first transmission gear set is installed on the first power input shaft 424, the final-stage gear of the first transmission gear set is installed on the first power output shaft 425, the lower end of the first lifting screw 426 is connected to the upper end of the first power output shaft 425 through a first coupling 428; the first lifting component 427 is provided with a first screw hole 429 screwed with the first lifting screw 426, the first lifting component 427 constitutes the power output end of the first lifting transmission mechanism, and the first lifting component 427 is installed on the first lifting platform 421. The power input shaft of the first lifting transmission mechanism is connected to the power output shaft of the first servo motor by transmission, for example, by a coupling. In addition, a first base 4210 is provided below the first housing 423 , and the first housing 423 is fixedly mounted on the first base 4210 .

[0040] The height adjustment mechanism of the suction and release film assembly may also include a plurality of first guide pillars, each of which is arranged in a vertical direction; a plurality of first guide sleeves are arranged on the first lifting platform, the number of the first guide sleeves is the same as that of the first guide pillars and they correspond one to one, the first guide sleeves are sleeved on the corresponding first guide pillars and can be lifted and lowered along the first guide pillars. Through the cooperation between the first guide sleeves and the first guide pillars, the first lifting platform can be guided to be lifted and lowered smoothly.

[0041] The film suction and release assembly 41 may include at least one suction cup and a suction cup position switching mechanism capable of switching the positions of the suction cups. The suction cup position switching mechanism switches the position of the suction cup between the sealing film storage device and the top of the packaging tube. After the suction cup sucks the sealing film from the sealing film storage device, the suction cup position switching mechanism delivers the suction cup and the sealing film thereon to the top of the packaging tube, and places the sealing film on the opening at the top of the packaging tube. The film suction and release assembly may adopt existing technology, and no further detailed description is given here.

[0042] refer to Figure 4In this embodiment, the heat sealing head height adjustment mechanism 52 includes a second lifting platform 521 and at least one second servo lifting unit; the second servo lifting unit includes a second servo motor 522 and a second lifting transmission mechanism, the second servo motor 522 is electrically connected to the corresponding output end of the control circuit, the power output shaft of the second servo motor 522 is drivingly connected to the power input end of the second lifting transmission mechanism; the power output end of the second lifting transmission mechanism is connected to the second lifting platform 521; the heat sealing head 51 is installed on the second lifting platform 521. Multiple second servo lifting units can share one second servo motor, or they can be respectively equipped with one second servo motor. The second lifting transmission mechanism includes a second housing 523, a second power input shaft 524, a second transmission gear set, a second power output shaft 525, a second lifting screw 526 and a second lifting component 527. The second transmission gear set is installed in the second housing 523, the second power input shaft 524 is rotatably installed on the second housing 523 along the horizontal direction, the second power output shaft 525 is rotatably installed on the second housing 523 along the vertical direction, the first-stage gear of the second transmission gear set is installed on the second power input shaft 524, the final-stage gear of the second transmission gear set is installed on the second power output shaft 525, the lower end of the second lifting screw 526 is connected to the upper end of the second power output shaft 525 through a second coupling 528; the second lifting component 527 is provided with a second screw hole 529 screwed with the second lifting screw 526, the second lifting component 527 constitutes the power output end of the second lifting transmission mechanism, and the second lifting component 527 is installed on the second lifting platform 521. The power input shaft of the second lifting transmission mechanism is connected to the power output shaft of the second servomotor by transmission, for example, by a coupling. In addition, a second base 5210 is provided below the second housing 523 , and the second housing 523 is fixedly mounted on the second base 5210 .

[0043] The heat sealing head height adjustment mechanism may also include multiple second guide pillars, each of which is arranged in the vertical direction; the second lifting platform is provided with multiple second guide sleeves, the number of second guide sleeves is the same as that of second guide pillars and they correspond one to one, the second guide sleeves are sleeved on the corresponding second guide pillars and can be lifted and lowered along the second guide pillars.

[0044] The heat sealing head 51 includes a heating plate and a heating plate lifting mechanism capable of driving the heating plate to rise and fall. The heating plate is provided with a heating component (such as an electric heating component). When the packaging tube with a sealing film placed on the top opening reaches below the heat sealing head, the heating plate lifting mechanism drives the heating plate to descend and press the sealing film. The heating plate heats the sealing film and completes heat sealing. After the heat sealing is completed, the heating plate lifting mechanism drives the heating plate to rise and reset. The heat sealing head can adopt existing technology, which will not be described in more detail here.

[0045] refer to Figures 5 to 7In this embodiment, the capping head height adjustment mechanism 62 includes a third lifting platform 621 and a third servo lifting mechanism capable of driving the third lifting platform 621 to lift and lower. The third servo lifting mechanism includes a third servo motor 622 and a third lifting transmission mechanism. The third servo motor 622 is electrically connected to the output end corresponding to the control circuit. The power output shaft of the third servo motor 622 is transmission-connected to the power input end of the third lifting transmission mechanism; the power output end of the third lifting transmission mechanism is connected to the third lifting platform 621; the capping head 61 is installed on the third lifting platform 621. The third lifting transmission mechanism includes a horizontal shaft 623, a left crank 624, a left connecting rod 625, a right crank 626, a right connecting rod 627, a plurality of guide posts 628 and a plurality of guide sleeves 629; each guide post 628 is fixedly mounted on the frame 1 and is in an up-and-down direction, each guide sleeve 629 is fixedly mounted on the third lifting platform 621, the number of guide sleeves 629 and guide posts 628 is the same and corresponds one to one, the guide sleeves 629 are sleeved on the guide posts 628 and can move up and down along the guide posts 628; the horizontal shaft 623 is rotatably mounted on the frame 1 and is oriented left and right. The power output shaft of the third servo motor 622 is drivingly connected to the horizontal shaft 623. One end of the left crank 624 is fixedly connected to the left end of the horizontal shaft 623. The other end of the left crank 624 is hinged to the upper end of the left connecting rod 625. The lower end of the left connecting rod 625 is hinged to the third lifting platform 621. One end of the right crank 626 is fixedly connected to the right end of the horizontal shaft 623. The other end of the right crank 626 is hinged to the upper end of the right connecting rod 627. The lower end of the right connecting rod 627 is hinged to the third lifting platform 621. The left crank 624 and the right crank 626 are parallel to each other, and the left connecting rod 625 and the right connecting rod 627 are parallel to each other. When the third servo motor 622 is running, its power output shaft drives the horizontal rotating shaft 623 to rotate forward or reverse, and the horizontal rotating shaft 623 drives the left crank 624 and the right crank 626 to swing back and forth around the horizontal rotating shaft 623 at a certain angle; the left crank 624 and the right crank 626 respectively drive the third lifting platform 621 and each guide sleeve 629 to rise and fall a certain distance along the guide column 628 through the left connecting rod 625 and the right connecting rod 627.

[0046] The packaging tube capping device 6 also includes a capping head mounting plate 63 and a capping head mounting plate translation mechanism capable of driving the capping head mounting plate 63 to reciprocate and translate. The capping head mounting plate translation mechanism is installed on the third lifting platform. In this embodiment, the capping head mounting plate translation mechanism includes a capping head mounting plate translation cylinder 64 and two guide blocks 65. The two guide blocks 65 are installed on the third lifting platform 621 and are arranged side by side left and right. The guide blocks 65 are provided with guide grooves 651 which are parallel to the capping head mounting plate translation cylinder 64; a transverse connecting strip 66 and two guide strips 67 are provided on the capping head mounting plate 63. The two guide strips 67 are arranged side by side left and right, and the two ends of the transverse connecting strip 66 are respectively connected to the two guide strips 67; the two guide strips 67 correspond one by one to the two guide grooves 651, and the guide strips 67 are in the corresponding guide grooves 651 and slide in cooperation with the guide grooves 651; the cylinder body of the capping head mounting plate translation cylinder 64 is installed on the third lifting platform 621 in the horizontal direction, and the piston rod of the capping head mounting plate translation cylinder 64 is connected to the transverse connecting strip 66.

[0047] refer to Figure 8The capping head 61 includes a suction capping cylinder 611, a suction cup seat 612, a suction cup 613 and a capping component 614. The suction capping cylinder 611 is a double-headed cylinder. The cylinder body 6111 of the suction capping cylinder 611 is installed on the capping head mounting plate 63 and is in an up-and-down direction. A first gas channel 615 is provided in the piston rod 6112 of the suction capping cylinder 611. The suction cup seat 612 and the capping component 614 are both installed at the lower end of the piston rod 6111 of the suction capping cylinder 611. The suction cup 613 is installed on the suction cup seat 612. A second gas channel 616 is provided in the suction cup seat 612. The second gas channel 616 connects the cavity of the suction cup 613 with the lower end of the first gas channel 615. The capping component 614 is located outside the suction cup 613. When the third servo lifting mechanism drives the third lifting platform 621 to rise and fall, the capping head mounting plate translation mechanism, the capping head mounting plate 63 and the capping head 61 rise and fall together with the third lifting platform 621. The upper end of the first gas channel 615 is used to communicate with the vacuum pumping device, and the vacuum pumping device can vacuum the cavity of the suction cup 613 through the first gas channel 615 and the second gas channel 616. When the capping work is performed, the capping head mounting plate translation mechanism drives the capping head mounting plate 63 and the capping head 61 to translate to the top of the cap storage mechanism, and then the suction capping cylinder 611 drives the suction cup 613 to descend, so that the suction cup 613 contacts the upper surface of the top cover 9, the cavity of the suction cup 613 is evacuated, the suction cup wall is deformed and close to the top cover, and the top cover 9 is sucked; then the suction capping cylinder 611 drives the suction cup 613 to rise, and the top cover 9 is taken out of the cap storage mechanism; then the capping head mounting plate translation mechanism drives the capping head mounting plate 63, the capping head 61 and the top cover to translate together, so that the capping head and the top cover reach the top of the packaging tube together; then the third servo lifting mechanism drives the third lifting platform 621 to descend, and the capping head mounting plate 63, the capping head 61 and the top cover 9 descend together with the third lifting platform 621; after the top cover 9 is aligned with the top of the packaging tube 8, the suction capping cylinder 61 The capping component 614, the suction cup 613 and the top cover 9 thereon are driven to descend, and the capping component 614 presses down the corresponding top cover 9 so that the top cover 9 is buckled on the top of the corresponding packaging tube 8, thereby completing the installation of the top cover 9. Subsequently, the air flows through the first air flow channel 615 and the second air flow channel 616 into the cavity of the suction cup 613, and the vacuum suction force of the suction cup on the top cover 9 is released. Alternatively, after the top cover 9 is aligned with the top of the packaging tube 8, the air flows through the first air flow channel 615 and the second air flow channel 616 into the cavity of the suction cup 613, and the vacuum suction force of the suction cup 613 on the top cover 9 is released, and the top cover 9 is released and overlapped on the top opening of the packaging tube 8. Subsequently, the capping cylinder 611 drives the capping component 614 to descend, and the capping component 614 presses down the corresponding top cover 9 so that the top cover 9 is buckled on the top of the corresponding packaging tube 8, thereby completing the installation of the top cover 9.After completing the installation of the top cover, the capping cylinder 611 can drive the capping component 614, the suction cup seat 612 and the suction cup 613 to rise and reset, and the third servo lifting mechanism drives the third lifting platform 621, the capping head mounting plate 63, and the capping head 61 to rise and reset together, completing a round of capping and capping actions.

[0048] refer to Figure 1 and Figure 2 The packaging tube conveying device 2 includes an endless conveyor belt 21 and a plurality of templates 22 mounted on the endless conveyor belt. The templates 22 are arranged at equal intervals on the endless conveyor belt 21. The templates 22 are provided with a plurality of (e.g., six) packaging tube positioning blocks 23. The bottom opening of the packaging tube 8 can be sleeved on the packaging tube positioning blocks 23. The endless conveyor belt can be replaced by an endless chain.

[0049] The number of suction cups in the film suction and release assembly, the number of heat sealing heads in the heat sealing device, and the number of capping heads in the packaging tube capping device are usually consistent with the number of packaging tube positioning blocks 23 on the template 22, for example, all of which are six. The packaging tube conveying device 2 moves forward one step at a time, the film suction and release device sucks and releases the sealing film on the six packaging tubes at the same time, the heat sealing device heat seals the six packaging tubes at the same time, and the packaging tube capping device caps the six packaging tubes at the same time.

[0050] The following is a brief description of the working principle of this packaging tube sealing machine:

[0051] When the packaging tube sealing machine is working, the packaging tube adding device 3 places the packaging tube 8 on the packaging tube conveying device 2, and then the packaging tube conveying device 2 conveys the packaging tube 8 to the film suction and release device 4 and the heat sealing device 5 in sequence, and the sealing film is placed on the top opening of the packaging tube 8 by the film suction and release device 4 The suction and release film assembly 41 in the film suction and release device 4, and then the sealing film is heat-sealed on the top opening of the packaging tube 8 by the heat sealing head 51 in the heat sealing device 5; then, the packaging tube conveying device 2 conveys the packaging tube 8 to a position corresponding to the packaging tube capping device 6, and the capping head 61 in the packaging tube capping device 6 buckles the top cover 9 onto the top opening of the packaging tube 8; finally, the packaging tube withdrawing device 7 withdraws the packaging tube 8 installed with the sealing film and the top cover from the packaging tube conveying device 2.

[0052] When the packaging tube sealing machine needs to be used for the installation of sealing film and top cover of packaging tube 8 of another height, after inputting or selecting the new packaging tube height value on the input device (touch screen), the input device transmits the packaging tube height value information to the control circuit; after processing by the control circuit, a control signal is sent to the suction and release film assembly height adjustment mechanism 42, the heat sealing head height adjustment mechanism 52, and the pressure head height adjustment mechanism 62 to operate, and the suction and release film assembly 41, the heat sealing head 51, and the pressure head 61 are adjusted or reset in the height direction to match the new packaging tube height, and then the packaging tube sealing machine can be produced normally. Specifically:

[0053] The control circuit sends a control signal to drive the power output shaft of each first servo motor 422 to rotate forward or reverse a corresponding number of revolutions; each first servo motor 422 then drives the first lifting platform 421 and the suction and release film assembly 41 to rise or fall a corresponding distance through the first lifting transmission mechanism, so that the initial height position of the suction and release film assembly 41 matches the new packaging tube height, thereby matching the range of movement of the suction and release film assembly 41 in the height direction with the new packaging tube height.

[0054] The control circuit sends a control signal to drive the power output shaft of each second servo motor 522 to rotate forward or reverse a corresponding number of times; each second servo motor 522 then drives the second lifting platform 521 and the heat sealing head 51 to rise or fall a corresponding distance through the second lifting transmission mechanism, so that the initial height position of the heat sealing head 51 matches the new packaging tube height, thereby making the range of movement of the heat sealing head 51 in the height direction match the new packaging tube height.

[0055] The control circuit adjusts the number of forward and reverse rotations of the third servo motor 622, and changes the angle of the reciprocating swing of the left crank 624 and the right crank 626 around the horizontal rotating shaft 623, so as to adjust the range of motion of the third lifting platform 621 and the capping head 61 in the height direction (i.e., the lifting stroke size) to match the height of the packaging tube.

[0056] The control circuit may be preset with a matching data table between various packaging tube heights and the first servo motor, the second servo motor, and the third servo motor. When in use, only the height data of the packaging tube needs to be input, and the control circuit can retrieve the corresponding matching data according to the matching data table, control the power output shaft of the first servo motor, the second servo motor, and the third servo motor to rotate forward or reverse the corresponding number of times, and adjust or reset the movable range of each related component in the height direction.

[0057] In other embodiments, the third lifting transmission mechanism may also include a horizontal rotating shaft, a crank, a connecting rod, a plurality of guide columns and a plurality of guide sleeves; each guide column is fixedly mounted on the frame and moves up and down, each guide sleeve is fixedly mounted on the third lifting platform, the number of guide sleeves and guide columns is the same and one-to-one, the guide sleeve is sleeved on the guide column and can move up and down along the guide column; the horizontal rotating shaft is rotatably mounted on the frame and moves left and right, the power output shaft of the third servo motor is connected to the horizontal rotating shaft, one end of the crank is connected to the horizontal rotating shaft, the other end of the crank is hinged to the upper end of the connecting rod, and the lower end of the connecting rod is hinged to the third lifting platform. The third servo motor is used as the power source of the lifting mechanism to facilitate the accurate control of the stroke of the third lifting platform. When the packaging tube sealing machine needs to be used for the top cover installation of a packaging tube of another height, it is only necessary to adjust the number of forward and reverse rotations of the third servo motor and change the angle of the reciprocating swing of the left crank and the right crank around the horizontal rotating shaft to adjust the lifting stroke of the third lifting platform and the capping head to match the height of the packaging tube.

[0058] In other embodiments, when it is not necessary to use the same capping head to realize the capping and capping operations (for example, a capping and placing mechanism is used to realize the taking and placing of the top cap, and a packaging tube capping device is used to perform the capping operation), the packaging tube capping device may also adopt other specific structures, for example: the capping head is directly mounted on the third lifting platform. In this case, the capping head may adopt a capping component fixedly mounted on the mounting plate of the capping head; or the capping head includes a capping cylinder and a capping component, the cylinder body of the capping cylinder is mounted on the third lifting platform and is in an up-and-down direction, and the capping component is mounted on the lower end of the piston rod of the capping cylinder.

[0059] In other embodiments, the capping head height adjustment mechanism may also adopt the same structure as the suction and release membrane assembly height adjustment mechanism and the heat sealing head height adjustment mechanism.

Claims

1. A packaging tube sealing machine, comprising a frame, a packaging tube conveying device, a packaging tube adding device, a film suction and release device, a heat sealing device, a packaging tube capping device and a packaging tube exiting device, wherein the packaging tube conveying device is installed on the frame, and the packaging tube adding device, the film suction and release device, the heat sealing device, the packaging tube capping device and the packaging tube exiting device are arranged in sequence from front to back along the conveying direction of the packaging tube conveying device, characterized in that: The suction and release film device includes a suction and release film assembly and a suction and release film assembly height adjustment mechanism capable of adjusting the movable range of the suction and release film assembly in the height direction; the heat sealing device includes at least one heat sealing head and a heat sealing head height adjustment mechanism capable of adjusting the movable range of the heat sealing head in the height direction; the packaging tube capping device includes at least one capping head and a capping head height adjustment mechanism capable of adjusting the movable range of the capping head in the height direction; the packaging tube sealing machine also includes an input device and a control circuit, the input device is electrically connected to the corresponding input end of the control circuit, and the suction and release film assembly height adjustment mechanism, the heat sealing head height adjustment mechanism, and the capping head height adjustment mechanism are respectively electrically connected to the corresponding output ends of the control circuit.

2. The packaging tube sealing machine according to claim 1, characterized in that: The input device adopts a touch screen.

3. The packaging tube sealing machine according to claim 1, characterized in that: The height adjustment mechanism of the suction and release film assembly includes a first lifting platform and at least one first servo lifting unit; the first servo lifting unit includes a first servo motor and a first lifting transmission mechanism, the first servo motor is electrically connected to the corresponding output end of the control circuit, and the power output shaft of the first servo motor is transmission-connected to the power input end of the first lifting transmission mechanism; the power output end of the first lifting transmission mechanism is connected to the first lifting platform; the suction and release film assembly is installed on the first lifting platform; The heat sealing head height adjustment mechanism includes a second lifting platform and at least one second servo lifting unit; the second servo lifting unit includes a second servo motor and a second lifting transmission mechanism, the second servo motor is electrically connected to the corresponding output end of the control circuit, and the power output shaft of the second servo motor is transmission-connected to the power input end of the second lifting transmission mechanism; the power output end of the second lifting transmission mechanism is connected to the second lifting platform; the heat sealing head is installed on the second lifting platform.

4. The packaging tube sealing machine according to claim 3, characterized in that: The first lifting transmission mechanism comprises a first housing, a first power input shaft, a first transmission gear set, a first power output shaft, a first lifting screw and a first lifting component, the first transmission gear set is installed in the first housing, the first power input shaft is rotatably installed on the first housing in a horizontal direction, the first power output shaft is rotatably installed on the first housing in a vertical direction, the first-stage gear of the first transmission gear set is installed on the first power input shaft, the final-stage gear of the first transmission gear set is installed on the first power output shaft, the lower end of the first lifting screw is connected to the upper end of the first power output shaft through a first coupling; the first lifting component is provided with a first screw hole screwed with the first lifting screw, the first lifting component constitutes the power output end of the first lifting transmission mechanism, and the first lifting component is installed on the first lifting platform; The second lifting transmission mechanism includes a second housing, a second power input shaft, a second transmission gear set, a second power output shaft, a second lifting screw and a second lifting component. The second transmission gear set is installed in the second housing, the second power input shaft is rotatably installed on the second housing in a horizontal direction, and the second power output shaft is rotatably installed on the second housing in a vertical direction. The first-stage gear of the second transmission gear set is installed on the second power input shaft, and the final-stage gear of the second transmission gear set is installed on the second power output shaft. The lower end of the second lifting screw is connected to the upper end of the second power output shaft through a second coupling; a second screw hole screwed with the second lifting screw is provided in the second lifting component. The second lifting component constitutes the power output end of the second lifting transmission mechanism, and the second lifting component is installed on the second lifting platform.

5. The packaging tube sealing machine according to claim 1, characterized in that: The capping head height adjustment mechanism includes a third lifting platform and a third servo lifting mechanism capable of driving the third lifting platform to lift and lower. The third servo lifting mechanism includes a third servo motor and a third lifting transmission mechanism. The third servo motor is electrically connected to the output end corresponding to the control circuit. The power output shaft of the third servo motor is transmission-connected to the power input end of the third lifting transmission mechanism; the power output end of the third lifting transmission mechanism is connected to the third lifting platform; and the capping head is installed on the third lifting platform.

6. The packaging tube sealing machine according to claim 5, characterized in that: The third lifting transmission mechanism includes a horizontal rotating shaft, a left crank, a left connecting rod, a right crank, a right connecting rod, a plurality of guide columns and a plurality of guide sleeves; each guide column is fixedly mounted on the frame and runs up and down, each guide sleeve is fixedly mounted on the third lifting platform, the number of guide sleeves is the same as that of guide columns and they correspond one to one, the guide sleeves are sleeved on the guide columns and can move up and down along the guide columns; the horizontal rotating shaft is rotatably mounted on the frame and runs left and right, the power output shaft of the third servo motor is transmission-connected to the horizontal rotating shaft, one end of the left crank is fixedly connected to the left end of the horizontal rotating shaft, the other end of the left crank is hinged to the upper end of the left connecting rod, the lower end of the left connecting rod is hinged to the third lifting platform, one end of the right crank is fixedly connected to the right end of the horizontal rotating shaft, the other end of the right crank is hinged to the upper end of the right connecting rod, and the lower end of the right connecting rod is hinged to the third lifting platform.

7. The packaging tube sealing machine according to claim 5, characterized in that: The third lifting transmission mechanism includes a horizontal rotating shaft, a crank, a connecting rod, a plurality of guide columns and a plurality of guide sleeves; each guide column is fixedly mounted on the frame and extends up and down, each guide sleeve is fixedly mounted on the third lifting platform, the number of guide sleeves is the same as that of guide columns and they correspond one to one, the guide sleeves are sleeved on the guide columns and can move up and down along the guide columns; the horizontal rotating shaft is rotatably mounted on the frame and extends left and right, the power output shaft of the third servo motor is transmission-connected to the horizontal rotating shaft, one end of the crank is connected to the horizontal rotating shaft, the other end of the crank is hinged to the upper end of the connecting rod, and the lower end of the connecting rod is hinged to the third lifting platform.

8. The packaging tube sealing machine according to any one of claims 5 to 7, characterized in that: The packaging tube capping device also includes a capping head mounting plate and a capping head mounting plate translation mechanism capable of driving the capping head mounting plate to reciprocate and translate, and the capping head mounting plate translation mechanism is installed on the third lifting platform; the capping head includes a capping suction and capping cylinder, a suction cup seat, a suction cup and a capping component, the capping suction and capping cylinder is a double-headed cylinder, the cylinder body of the capping suction and capping cylinder is installed on the capping head mounting plate and is in an up and down direction, a first gas channel is provided in the piston rod of the capping suction and capping cylinder, the suction cup seat and the capping component are both installed at the lower end of the piston rod of the capping suction and capping cylinder, the suction cup is installed on the suction cup seat, and a second gas channel is provided in the suction cup seat, the second gas channel connects the cavity of the suction cup with the lower end of the first gas channel, and the capping component is located outside the suction cup.

9. The packaging tube sealing machine according to any one of claims 5 to 7, characterized in that: The capping head comprises a capping component, and the capping component is fixedly mounted on the third lifting platform.

10. The packaging tube sealing machine according to any one of claims 5 to 7, characterized in that: The capping head comprises a capping cylinder and a capping component. The cylinder body of the capping cylinder is installed on the third lifting platform and is oriented up and down. The capping component is installed at the lower end of the piston rod of the capping cylinder.

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