Servo continuous vertical packaging machine

Abstract

The utility model relates to a kind of related technical fields of packaging machinery, specifically a kind of servo continuous vertical packaging machine, including rack, film material conveying mechanism for conveying film material is sequentially arranged on rack, film material guiding mechanism, for forming film material into tubular film material bag maker, for longitudinal heat sealing to tubular film material longitudinal heat sealing mechanism, for tubular film material is transversely heat sealed transverse heat sealing mechanism, and for the cutter mechanism for the bag body that heat sealing is completed is cut off;The utility model can reciprocate along vertical direction under the action of driving mechanism by transverse heat sealing mechanism, its up-down movement speed is equal to the speed of longitudinal heat sealing mechanism to drag tubular film material, so that transverse heat sealing action and longitudinal traction action are synchronized, replace the intermittent working mode that traditional vertical packaging machine must stop drawing film during transverse sealing, whole machine operating speed is no longer limited by transverse heat sealing link, realize continuous high-speed operation.

Description

Technical Field

[0001] This utility model relates to the technical field of packaging machinery, specifically a servo continuous vertical packaging machine. Background Technology

[0002] Vertical packaging machines are used to heat and soften plastic composite films to form bag-shaped packaging containers, and continuously complete bag making, filling, longitudinal sealing, transverse sealing and cutting on the same equipment. As downstream industries continue to increase their requirements for packaging speed, appearance quality and thick film adaptability, the structural rationality of the longitudinal sealing and transverse sealing mechanisms has become the key to restricting the overall performance of the machine.

[0003] Existing vertical packaging machines use either a series structure of independent traction wheels and independent longitudinal sealing wheels in their longitudinal sealing sections, which suffers from a lengthy mechanism and excessively high longitudinal sealing temperatures leading to shortened component lifespan; or a scheme using dual longitudinal sealing wheels in series (see CN217836338U), which can accommodate thick films but significantly increases space and cost; or a scheme that integrates heating and traction into the same pair of heating wheels (see CN209535632U), where the two wheels are passively pressed and manually separated only by a spring and an eccentric handle. This makes it difficult to accurately adapt to film materials of different thicknesses, and the two wheels cannot be separated in time after the machine stops, leaving residual heat acting on the film material for a long time, which can easily cause the film material to soften or even melt through, affecting the packaging quality of the next startup.

[0004] In the horizontal sealing section, the horizontal heat sealing action and the film pulling action of the traditional clamp-type vertical packaging machine are independent of each other. When the horizontal seal is closed, the film pulling must be stopped, and when the film is pulled, the horizontal sealing mold must be separated. The two are executed in time, and there is a significant pause in each bag production cycle, which limits the speed of the whole machine.

[0005] Existing technology proposes to make the entire transverse heat sealing mechanism reciprocate vertically, simultaneously completing the transverse sealing action during the downward movement (see CN111746872B for details). In this scheme, the transmission driving the transverse sealing mechanism to rise and fall consists of only two parts: a swing arm and a connecting rod. One end of the connecting rod is directly hinged to the transverse sealing frame, and the slider of the lifting guide rail is also directly fixed to the rear of the transverse sealing frame. Because there is no independent transmission intermediate component between the driving and driven components, the lateral force generated by the swing of the connecting rod acts directly between the transverse sealing frame and the guide rail. Under long-term high-speed operation, the sliding pair wears out rapidly, and the motion accuracy decreases. At the same time, its longitudinal sealing section still uses a single set of heating wheels and passive spring clamping, which cannot actively control the opening and closing of the longitudinal sealing elements, and the problem of residual heat during shutdown still exists.

[0006] In summary, how to achieve synchronous and continuous material feeding of horizontal sealing and film stretching, while further ensuring smooth movement of the horizontal sealing drive mechanism, decoupling of lateral force from vertical main load, and enabling the longitudinal sealing element to actively separate during shutdown to avoid residual heat damaging the film material, is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0007] The purpose of this invention is to provide a servo-driven continuous vertical packaging machine to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a servo continuous vertical packaging machine, comprising a frame, on which are sequentially arranged a film material conveying mechanism for conveying film material, a film material guiding mechanism, a bag maker for forming the film material into a tubular film material, a longitudinal heat sealing mechanism for longitudinally heat sealing the tubular film material, a transverse heat sealing mechanism for transversely heat sealing the tubular film material, and a cutting mechanism for cutting the heat-sealed bag; the transverse heat sealing mechanism is slidably disposed on the frame in the vertical direction, and the frame is provided with a sliding groove for the transverse heat sealing mechanism to slide up and down; it also includes a driving mechanism disposed in the inner cavity of the frame, the driving mechanism being used to drive the transverse heat sealing mechanism to reciprocate up and down in the vertical direction; when the transverse heat sealing mechanism moves downward under the drive of the driving mechanism, it performs a transverse heat sealing action on the tubular film material, and cooperates with the longitudinal heat sealing mechanism to convey the tubular film material downward.

[0009] Furthermore, the driving mechanism includes a servo motor, an eccentric mounting plate, an eccentric connecting rod, a spherical bearing connecting plate, a swing connecting plate, and several linear slide rails; the output shaft of the servo motor is fixedly connected to one end of the eccentric mounting plate, and both ends of the eccentric connecting rod are rotatably connected to the eccentric mounting plate and the spherical bearing connecting plate, respectively; the spherical bearing connecting plate is fixedly disposed on the rear side of the swing connecting plate, and the swing connecting plate is connected to the transverse heat sealing mechanism; the linear slide rail is disposed in the inner cavity of the frame, and the swing connecting plate is fixedly connected to the slider portion of the linear slide rail, so that the swing connecting plate can slide up and down along the linear slide rail.

[0010] Furthermore, the transverse heat-sealing mechanism includes a heat-sealing frame, in which two heat-sealing mounting plates are arranged in a relatively open manner. Each of the two heat-sealing mounting plates has a heat-sealing plate on its opposite side for heat-sealing the tubular film material. The bottom of the heat-sealing plate is connected to a gas clamping plate for venting gas from the bag.

[0011] Furthermore, the longitudinal heat-sealing mechanism includes an embossing heat-sealing assembly, an adjusting assembly, and a driving assembly; the embossing heat-sealing assembly includes two rotatably arranged rotating shafts and heat-sealing rings respectively sleeved on the two rotating shafts, the two heat-sealing rings being arranged opposite each other and capable of embossing and heat-sealing the tubular film material; the adjusting assembly includes a fixed connecting block and a movable connecting block, the two rotating shafts respectively passing through and rotatably arranged on the fixed connecting block and the movable connecting block; the adjusting assembly also includes a cylinder for driving the movable connecting block to move closer to or away from the fixed connecting block, so that the two heat-sealing rings can move closer to each other and press together during operation, and separate from each other when the machine stops.

[0012] Furthermore, the adjustment assembly also includes a limiting sleeve for limiting the moving distance of the moving connecting block, the limiting sleeve ensuring that the transmission between the two rotating shafts remains engaged at all times.

[0013] Furthermore, a heating element is provided inside the heat-sealing ring, and a rotary power supply device for continuously supplying power to the heating element is provided on the rotating shaft.

[0014] Furthermore, it also includes a film stretching and pressing mechanism, which includes a fixed clamping rod and a movable clamping rod arranged opposite to each other. The movable clamping rod can move closer to or further away from the fixed clamping rod to clamp the film material.

[0015] Furthermore, the cutting mechanism includes a lower cutting frame that is vertically adjustable and positioned on the front side of the frame, and the lower cutting frame contains a fixed cutting blade and a movable cutting blade that cooperate to cut the bag body.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] (1) The transverse heat sealing mechanism of this utility model can move up and down in the vertical direction under the action of the drive mechanism. Its up and down movement speed is equal to the speed of the longitudinal heat sealing mechanism pulling the cylindrical film material, so that the transverse heat sealing action and the longitudinal traction action are carried out synchronously. This replaces the intermittent working mode of traditional vertical packaging machine that must stop pulling the film during the transverse sealing period. The running speed of the whole machine is no longer limited by the transverse heat sealing link, and continuous high-speed operation is achieved.

[0018] (2) The adjustment component of the longitudinal heat sealing mechanism of this utility model adopts a cylinder to actively drive the moving connecting block, which can press the two heat sealing rings together with controllable pressure in the working state, and actively separate the two heat sealing rings from each other in the stopped state, so as to avoid the residual heat of the heating element being transferred to the cylindrical film material for a long time, causing the film material to soften or melt through.

[0019] (3) This utility model limits the maximum moving distance of the moving connecting block by using a limiting sleeve, so that the drive gears on the two rotating shafts can maintain reliable meshing in any working or stopping state, avoiding faults such as disengagement of the drive gears, interruption of the drive chain when starting up, or asynchronous speed of the two shafts due to excessive displacement of the moving connecting block.

[0020] (4) The present invention applies a continuous elastic clamping force to the adjusting mounting seat through the compression spring in the spring rod, so that the moving clamping rod and the fixed clamping rod can adaptively clamp cylindrical film materials of different thicknesses and materials. There is no need to adjust the clamping force separately for each type of film material, and when changing the film, you only need to manually pull the spring rod to quickly release the clamping. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a servo-driven continuous vertical packaging machine.

[0022] Figure 2 This is a schematic diagram of the longitudinal heat sealing mechanism of a servo continuous vertical packaging machine.

[0023] Figure 3 This is a schematic diagram of the film stretching and pressing mechanism of a servo continuous vertical packaging machine.

[0024] Figure 4 A top view of the heat sealing frame and heat sealing plate structure of a servo continuous vertical packaging machine;

[0025] Figure 5 This is a schematic diagram of the eccentric connecting rod, eccentric mounting plate, and eccentric swing connecting plate of a servo continuous vertical packaging machine.

[0026] Figure 6 This is a schematic diagram of the cutting mechanism of a servo continuous vertical packaging machine.

[0027] In the diagram: 1. Frame; 2. Film material conveying mechanism; 3. Film material guiding mechanism; 4. Bag maker; 5. Longitudinal heat sealing mechanism; 51. Rotating shaft; 512. Mounting ring; 513. Heating ring; 514. Heat sealing ring; 52. Drive motor; 522. Transmission gear; 523. Drive gear; 53. Carbon brush mounting rod; 531. Carbon brush mounting bracket; 532. Heating tube; 533. Slip ring; 54. Connecting support plate; 541. Connecting support rod; 542. Fixed connecting block; 543. Limit sleeve; 544. Adjusting cylinder; 545. Moving connecting block; 6. Transverse heat sealing mechanism; 61. Heat sealing frame; 62. Heat sealing mounting plate; 63. Heat sealing plate; 64. 65. Clamping plate; 66. Opening and closing cylinder; 7. Guide rod; 8. Cutting mechanism; 71. Lower cutting frame; 72. Fixed cutting blade; 73. Moving cutting blade; 74. Adjusting frame; 75. Adjusting mounting plate; 76. Lead screw; 77. Lead screw sleeve; 78. Adjusting connecting block; 8. Film pulling and pressing mechanism; 81. Film pressing mounting plate; 82. Spring pull rod; 83. Adjusting mounting seat; 84. Guide rail plate; 85. Moving clamping rod; 86. Fixed clamping rod; 9. Sliding groove; 10. Drive mechanism; 101. Servo motor; 102. Eccentric mounting plate; 103. Eccentric connecting rod; 104. Spherical bearing connecting plate; 105. Swing connecting plate; 106. Linear slide rail. Detailed Implementation

[0028] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0029] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0030] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0031] See Figure 1 The servo continuous vertical packaging machine provided in this embodiment includes a frame 1, and a film material conveying mechanism 2, a film material guiding mechanism 3, a bag maker 4, a longitudinal heat sealing mechanism 5, a transverse heat sealing mechanism 6, a cutting mechanism 7, a film stretching and pressing mechanism 8, and a driving mechanism 10, all mounted on the frame 1. The frame 1 is the load-bearing component of the whole machine, and its interior has an inner cavity for accommodating the power transmission components. Its front side is used to install working components facing the operation side.

[0032] The film material conveying mechanism 2 is located at the top of the frame 1 and is used to continuously convey the roll of film material to the bag maker 4. The film material guiding mechanism 3 is also located at the top of the frame 1, between the film material conveying mechanism 2 and the bag maker 4. It is used to adjust the conveying path of the film material and to tension the film material to prevent wrinkles or deviations from occurring during the conveying process. Both the film material conveying mechanism 2 and the film material guiding mechanism 3 are conventional components of vertical packaging machines. Their specific structures can refer to various forms disclosed in the art. This embodiment does not make specific limitations on them.

[0033] The bag maker 4 is mounted on the frame 1 and located below the film material guiding mechanism 3. It is used to form the planar film material conveyed by the film material guiding mechanism 3 into a cylindrical film material with a longitudinal joint seam. Specifically, the bag maker 4 has a funnel-shaped forming inlet and a tubular forming outlet. When the film material passes around the outer surface of the bag maker 4, it gradually deforms from a planar shape into a cylindrical shape. The two longitudinal ends of the cylindrical film material overlap each other at the tubular forming outlet of the bag maker 4 to form a longitudinal joint seam.

[0034] The longitudinal heat sealing mechanism 5 is mounted on the frame 1 and located below the bag maker 4, and is used to heat seal the longitudinal joint of the tubular film material. The transverse heat sealing mechanism 6 is located on the front side of the frame 1 and below the longitudinal heat sealing mechanism 5, and is used to heat seal the tubular film material transversely to form the top and bottom seals of the packaging bag.

[0035] The cutting mechanism 7 is located on the front side of the frame 1 and below the transverse heat sealing mechanism 6. It is used to cut the bag body transversely after it has been heat sealed by the transverse heat sealing mechanism 6, so that the two adjacent bags are separated from each other.

[0036] The transverse heat sealing mechanism 6 is slidably mounted on the front side of the frame 1 in the vertical direction. During operation, the transverse heat sealing mechanism 6 can reciprocate linearly in the up and down direction relative to the frame 1.

[0037] To enable the slidable installation of the transverse heat sealing mechanism 6, a sliding groove 9 is provided on the front side of the frame 1 at the position corresponding to the transverse heat sealing mechanism 6. The sliding groove 9 extends vertically, and the part of the transverse heat sealing mechanism 6 connected to the frame 1 can pass through the sliding groove 9 and slide vertically within the sliding groove 9. The length of the sliding groove 9 in the vertical direction is not less than the stroke of the transverse heat sealing mechanism 6.

[0038] The drive mechanism 10 is located inside the frame 1. The input end of the drive mechanism 10 receives the rotational motion, and the output end of the drive mechanism 10 is connected to the transverse heat sealing mechanism 6. The drive mechanism 10 converts the rotational motion into linear reciprocating motion and outputs it to the transverse heat sealing mechanism 6, so that the transverse heat sealing mechanism 6 moves up and down in the vertical direction. The specific structural form of the drive mechanism 10 is not limited. Any mechanism that can convert rotational motion into vertical reciprocating motion can be used as the drive mechanism 10.

[0039] In addition to the crank-connecting rod structure in this technical solution, where the drive mechanism 10 adopts a crank-connecting rod structure including a servo motor 101, an eccentric mounting plate 102, an eccentric connecting rod 103, a spherical bearing connecting plate 104, a swing connecting plate 105, and a linear slide rail 106, in other embodiments, the drive mechanism 10 may also adopt a cam push rod structure, that is, a fixed motor drives the cam to rotate, and the cam pushes the push rod connected to the transverse heat sealing mechanism 6 to perform linear reciprocating motion in the vertical direction.

[0040] In other embodiments, the drive mechanism 10 may also adopt a gear and rack type structure or a lead screw and nut type structure, in which a fixed motor converts the rotational motion into the up-and-down reciprocating linear motion of the transverse heat sealing mechanism 6 via gear and rack transmission or lead screw and nut transmission. All of the above-mentioned structures belong to the known rotational-vertical motion conversion mechanisms in the art, and those skilled in the art can choose according to actual needs.

[0041] The film stretching and pressing mechanism 8 is located on the front side of the frame 1 and is used to clamp and press the tubular film material conveyed by the bag maker 4 to prevent the tubular film material from shifting laterally or loosening during the conveying process.

[0042] In this embodiment, combined with Figure 1 and Figure 5 The specific structure of the drive mechanism 10 is further described below. The drive mechanism 10 includes a servo motor 101, an eccentric mounting plate 102, an eccentric connecting rod 103, a joint bearing connecting plate 104, a swing connecting plate 105, and several linear slide rails 106.

[0043] The servo motor 101 is fixedly installed in the inner cavity of the frame 1. The output shaft of the servo motor 101 is arranged horizontally and faces the front of the frame 1. The eccentric mounting plate 102 is a circular plate-shaped component. A shaft hole that mates with the output shaft of the servo motor 101 is opened at the center of the eccentric mounting plate 102. The output shaft of the servo motor 101 passes through the shaft hole and is fixedly connected to the eccentric mounting plate 102, so that the eccentric mounting plate 102 can rotate synchronously with the output shaft of the servo motor 101.

[0044] An eccentric shaft is also provided on the eccentric mounting plate 102. The axis of the eccentric shaft is parallel to the axis of the output shaft of the servo motor 101. A predetermined eccentric distance is maintained between the axis of the eccentric shaft and the axis of the output shaft of the servo motor 101. The eccentric distance determines the up and down stroke of the subsequent transverse heat sealing mechanism 6.

[0045] One end of the eccentric connecting rod 103 has a first connecting hole, which is rotatably fitted onto the eccentric shaft of the eccentric mounting plate 102, allowing one end of the eccentric connecting rod 103 to rotate freely relative to the eccentric mounting plate 102 around the axis of the eccentric shaft. The other end of the eccentric connecting rod 103 has a second connecting hole, which is rotatably connected to the spherical bearing connecting plate 104. Specifically, the spherical bearing connecting plate 104 is provided with a spherical bearing, the inner ring of which mates with the second connecting hole of the eccentric connecting rod 103, and the outer ring of which is fixedly connected to the spherical bearing connecting plate 104. The spherical bearing enables a rotatable connection between the other end of the eccentric connecting rod 103 and the spherical bearing connecting plate 104.

[0046] The sway connecting plate 105 is located in the inner cavity of the frame 1 and is a plate-shaped component. The front side of the sway connecting plate 105 is fixedly connected to the rear end of the transverse heat sealing mechanism 6, and the rear side of the sway connecting plate 105 is fixedly connected to the spherical bearing connecting plate 104, so that the linear motion of the spherical bearing connecting plate 104 can be transmitted to the sway connecting plate 105, and then the sway connecting plate 105 drives the transverse heat sealing mechanism 6 to move in the vertical direction.

[0047] The linear slide rail 106 is fixedly installed in the inner cavity of the frame 1. Preferably, there are two linear slide rails 106. The two linear slide rails 106 extend vertically and are spaced apart horizontally so that the sway connecting plate 105 moves stably under the two linear slide rails 106.

[0048] Each linear slide rail 106 includes a slide rail portion fixed to the inner cavity of the frame 1 and a slider portion that can slide along the slide rail portion. The rear side of the sway connecting plate 105 is fixedly connected to the slider portions of the two linear slide rails 106, so that the sway connecting plate 105 can move in a straight line in the vertical direction along the two linear slide rails 106.

[0049] In some embodiments, the control system of the servo motor 101 can preset the target rotation speed corresponding to each revolution of the eccentric mounting plate 102 according to the requirements of the production bag length, so that the linear speed of the transverse heat sealing mechanism 6 in the downward phase is equal to the film traction linear speed of the longitudinal heat sealing mechanism 5, and returns to the position quickly at a higher speed in the upward phase.

[0050] In this embodiment, the following is combined with Figure 1 and Figure 4The specific structure of the transverse heat sealing mechanism 6 is further explained. The transverse heat sealing mechanism 6 includes a heat sealing frame 61, two heat sealing mounting plates 62, two heat sealing plates 63, and two air clamping plates 64.

[0051] The heat sealing frame 61 is a frame-like component. The rear end of the heat sealing frame 61 is fixedly connected to the front side of the sway connecting plate 105, so that the heat sealing frame 61 can move up and down in the vertical direction as a whole with the sway connecting plate 105. The inner cavity of the heat sealing frame 61 is used to accommodate two heat sealing mounting plates 62 and their driving components.

[0052] Two heat-sealing mounting plates 62 are respectively disposed at the left and right ends of the inner cavity of the heat-sealing frame 61. The two heat-sealing mounting plates 62 are arranged opposite each other and can move closer or further away from each other in the horizontal direction within the inner cavity of the heat-sealing frame 61 to respectively achieve clamping, sealing and releasing of the tubular film material. To guide the horizontal sliding of the two heat-sealing mounting plates 62, guide rods 66 are provided laterally at the front and rear ends of the inner cavity of the heat-sealing frame 61. Through holes are opened at the front and rear ends of the two heat-sealing mounting plates 62 respectively. The two heat-sealing mounting plates 62 are respectively sleeved on the two guide rods 66 through the through holes and slide along the guide rods 66.

[0053] Opening and closing cylinders 65 are respectively provided on the left and right sides of the heat sealing frame 61. The cylinder body of the opening and closing cylinder 65 is fixed on the heat sealing frame 61. The piston rod end of the opening and closing cylinder 65 is fixedly connected to the heat sealing mounting plate 62 located on the corresponding side of the two heat sealing mounting plates 62. Through the synchronous drive of the two opening and closing cylinders 65, the two heat sealing mounting plates 62 can move closer to each other to perform heat sealing action on the cylindrical film material, or move away from each other to release the cylindrical film material.

[0054] Two heat-sealing plates 63 are fixedly installed on the opposite sides of two heat-sealing mounting plates 62, and the two heat-sealing plates 63 are arranged opposite each other. The opposite sides of the two heat-sealing plates 63 are the working surfaces for actually performing the heat-sealing action. Heating elements and temperature sensors can be set on the working surfaces as needed to heat and seal the heat-sealed part of the cylindrical film material sandwiched between the two heat-sealing plates 63 when they are closed together. The specific forms of the heating elements and temperature sensors can refer to various forms disclosed in the art, and this embodiment does not specifically limit them.

[0055] Two air clamping plates 64 are respectively connected to the bottom of two heat sealing plates 63. The air clamping plates 64 are positioned below the working surface of the heat sealing plates 63. As the two heat sealing mounting plates 62 approach each other, the two air clamping plates 64 contact the tubular film material before the two heat sealing plates 63 and pre-compress the tubular film material. This squeezes the air in the bag cavity below the current transverse heat sealing position of the tubular film material from the top of the tubular film material, avoiding the problem of gas expansion inside the bag and air clamping at the sealing point when the two heat sealing plates 63 are closed and sealed, thus improving the quality and reliability of transverse heat sealing.

[0056] In this embodiment, combined with Figure 1 and Figure 2 The specific structure of the longitudinal heat sealing mechanism 5 is further explained. The longitudinal heat sealing mechanism 5 includes an embossing heat sealing component, an adjusting component, and a driving component. The embossing heat sealing component is a working part that performs the longitudinal heat sealing action. The adjusting component is an adjusting component that adjusts the working distance of the embossing heat sealing component. The driving component is a power component that drives the embossing heat sealing component to rotate continuously.

[0057] The embossing heat-sealing assembly includes two parallel rotating shafts 51 and two heat-sealing rings 514. The two rotating shafts 51 are arranged horizontally and spaced apart along the front-rear direction of the frame 1. The axes of the two rotating shafts 51 are parallel to each other. Each rotating shaft 51 has an installation ring 512 at its outer end. The inner cavity of the installation ring 512 is provided with a heating ring 513. The heating ring 513 has a heating element inside. The outer circumferential surface of the heating ring 513 is fitted with a heat-sealing ring 514. The heat-sealing ring 514 is an annular component with a certain thickness. The outer circumferential surface of the heat-sealing ring 514 is provided with longitudinally extending embossing teeth. The embossing teeth are used to emboss the surface of the longitudinal joint of the tubular film material to enhance the sealing strength while heat-sealing the longitudinal joint.

[0058] Two heat-sealing rings 514 are respectively set at the outer ends of the two rotating shafts 51. The two heat-sealing rings 514 are arranged opposite each other. The longitudinal joint of the tubular film material passes between the two heat-sealing rings 514 under the guidance of the bag maker 4. When the two heat-sealing rings 514 are pressed together, the longitudinal joint is clamped between the two heat-sealing rings 514. The longitudinal heat sealing is completed under the combined action of the heat transferred by the heating ring 513 and the embossed teeth of the two heat-sealing rings 514 meshing with each other.

[0059] The adjustment assembly is used to adjust the spacing between the two heat sealing rings 514. The adjustment assembly includes a connecting support plate 54, a fixed connecting block 542, a movable connecting block 545, and an adjusting cylinder 544. The connecting support plate 54 is a plate-shaped component, and there are two connecting support plates 54. The two connecting support plates 54 are respectively disposed at both ends of the front side of the frame 1 and are fixedly connected to the frame 1. The two connecting support plates 54 are arranged opposite to each other and spaced apart in the horizontal direction to form an installation space between them for accommodating the fixed connecting block 542 and the movable connecting block 545.

[0060] Both the fixed connecting block 542 and the movable connecting block 545 are block-shaped components. The fixed connecting block 542 is fixedly connected to both connecting support plates 54. The front and rear ends of the movable connecting block 545 are respectively set between the two connecting support plates 54 in a manner that allows it to slide horizontally. The direction of movement of the movable connecting block 545 relative to the fixed connecting block 542 is perpendicular to the axis of the two rotating shafts 51. The two rotating shafts 51 pass through the fixed connecting block 542 and the movable connecting block 545 respectively. The two rotating shafts 51 are rotatably connected to the fixed connecting block 542 and the movable connecting block 545 through bearings, so that the two rotating shafts 51 can rotate freely relative to the fixed connecting block 542 and the movable connecting block 545. The position of the rotating shaft 51 passing through the fixed connecting block 542 is fixed relative to the frame 1, and the position of the rotating shaft 51 passing through the movable connecting block 545 can move synchronously with the movable connecting block 545.

[0061] An adjusting cylinder 544 is mounted on one of the two connecting support plates 54. The piston rod end of the adjusting cylinder 544 faces and is connected to the moving connecting block 545. After compressed gas is introduced into the adjusting cylinder 544, the piston rod end of the adjusting cylinder 544 pushes the moving connecting block 545 to move horizontally closer to or further away from the fixed connecting block 542. This causes the heat sealing ring 514 on the rotating shaft 51 passing through the moving connecting block 545 to move closer to or further away from the heat sealing ring 514 on the rotating shaft 51 passing through the fixed connecting block 542, thereby adjusting the working distance between the two heat sealing rings 514.

[0062] In this embodiment, please refer to the accompanying drawings for details. Figure 2 This embodiment further describes the transmission and limiting structure of the longitudinal heat sealing mechanism 5. The drive assembly includes a drive motor 52, a transmission gear 522, and two drive gears 523. The drive motor 52 is fixedly installed in the inner cavity of the frame 1, and the transmission gear 522 is fixedly installed on the output shaft of the drive motor 52.

[0063] Two drive gears 523 are respectively sleeved on two rotating shafts 51 and rotate synchronously with the rotating shafts 51. The two drive gears 523 are located on the same side of the fixed connecting block 542 and the moving connecting block 545. The two drive gears 523 mesh with each other to achieve synchronous reverse rotation between the two rotating shafts 51. The drive gear 523 closer to the transmission gear 522 also meshes with the transmission gear 522, so that the power output by the drive motor 52 is transmitted to the drive gear 523 on that side through the transmission gear 522, and then transmitted to the drive gear 523 on the other side through the meshing between the two drive gears 523. This drives the two rotating shafts 51 and the two heat sealing rings 514 on them to rotate synchronously in opposite directions at the same speed, pulling the cylindrical film material downward in the vertical direction.

[0064] It should be noted that, since the adjusting cylinder 544 can drive the moving connecting block 545 to reciprocate horizontally relative to the fixed connecting block 542, the rotating shaft 51 passing through the moving connecting block 545 and the driving gear 523 on it also move horizontally. During this horizontal movement, there is a risk that the two driving gears 523 may disengage due to excessive horizontal displacement.

[0065] To avoid this situation, the adjustment assembly also includes a limiting sleeve 543 disposed on the connecting support rod 541. The connecting support rod 541 is horizontally disposed between the two connecting support plates 54 in the horizontal direction. Preferably, there is one connecting support rod 541 at the top and one at the bottom, which respectively pass through the fixed connecting block 542 and the movable connecting block 545. The fixed connecting block 542 and the movable connecting block 545 can move axially relative to the connecting support rod 541.

[0066] The limiting sleeve 543 is fitted onto the connecting support rod 541. The limiting sleeve 543 is located between the moving connecting block 545 and all adjacent connecting support plates 54. When the adjusting cylinder 544 drives the moving connecting block 545 to move away from the fixed connecting block 542, the side of the moving connecting block 545 facing the limiting sleeve 543 first abuts against the limiting sleeve 543. The limiting sleeve 543 limits the moving connecting block 545, ensuring that the maximum distance of the moving connecting block 545 from the fixed connecting block 542 will not affect the meshing of the two drive gears 523. Even when the adjusting cylinder 544 drives the moving connecting block 545 to separate the two heat sealing rings 514 in the stopped state, the two drive gears 523 still maintain a reliable meshing relationship, avoiding faults such as drive chain interruption and asynchronous speed of the two rotating shafts 51 due to the disengagement of the two drive gears 523.

[0067] In this embodiment, please refer to the accompanying drawings. Figure 2 The heating structure includes a heating tube 532, a collector ring 533, a carbon brush mounting rod 53, and a carbon brush mounting bracket 531. The heating tube 532 is disposed inside the heating ring 513 and electrically connected to the heating ring 513. The heating tube 532 provides heat to the heating ring 513, which then transfers the heat to the heat sealing ring 514 sleeved on its outer periphery, so that the surface temperature of the heat sealing ring 514 reaches the temperature required for longitudinal heat sealing of the cylindrical film material.

[0068] The collector ring 533 is sleeved on the surface of the rotating shaft 51. The collector ring 533 is located along the surface of the rotating shaft 51 and behind the drive gear 523. The collector ring 533 rotates synchronously with the rotating shaft 51. The internal conductive ring of the collector ring 533 is electrically connected to the heating tube 532.

[0069] The inner end of the carbon brush mounting rod 53 extends into the inner cavity of the frame 1. The outer end of the carbon brush mounting rod 53 is fixedly mounted on the rear side of the fixed connecting block 542 and the moving connecting block 545, respectively. A carbon brush mounting bracket 531 is fixed on the carbon brush mounting rod 53. The position of the carbon brush mounting bracket 531 corresponds to the position of the slip ring 533. An elastically pressed carbon brush is provided inside the carbon brush mounting bracket 531. The contact end of the carbon brush abuts against the outer peripheral surface of the slip ring 533 and maintains contact with the slip ring 533.

[0070] An external power source is connected to the carbon brush in the carbon brush mounting bracket 531 via a wire. The carbon brush transmits current to the collector ring 533 through sliding contact with the collector ring 533, and then the collector ring 533 transmits the current to the heating tube 532 via a wire, thereby providing a continuous and uninterrupted power supply to the heating tube 532 while the rotating shaft 51 continues to rotate.

[0071] It is understood that the heating element of the longitudinal heat-sealing mechanism 5 can also adopt electromagnetic induction heating, that is, a fixed excitation coil is set outside the heating ring 513, and the heating ring 513 itself is directly heated as an induction heating element, thereby eliminating sliding contact elements such as the slip ring 533 and the carbon brush mounting bracket 531, further improving the reliability and service life of the power supply system. Those skilled in the art can select a suitable heating method according to actual needs.

[0072] This embodiment mainly describes the structure of the film stretching and pressing mechanism 8. Please refer to the accompanying drawings for details. Figure 1 and Figure 3 The film pressing mounting plate 81 is set on the front side of the frame 1 and is fixedly connected to the frame 1. The fixed clamping rod 86 is set at one end of the front side of the film pressing mounting plate 81. The position of the fixed clamping rod 86 is fixed relative to the film pressing mounting plate 81. The fixed clamping rod 86 extends horizontally and its extension direction is towards the bag maker 4.

[0073] The adjusting mounting base 83 is located at the other end of the front side of the film-forming mounting plate 81. The adjusting mounting base 83 can slide horizontally relative to the film-forming mounting plate 81, moving closer to or further away from the fixed clamping rod 86. To guide the horizontal sliding of the adjusting mounting base 83, guide rails 84 are horizontally provided at the top and bottom of the front side of the film-forming mounting plate 81. The guide rails 84 extend horizontally and are L-shaped. The top and bottom of the adjusting mounting base 83 are located on the inner walls of the two guide rails 84, respectively. Therefore, the adjusting mounting base 83 can only move horizontally in a straight line along the extension direction of the guide rails 84.

[0074] The movable clamping rod 85 is disposed in the inner cavity of the adjusting mounting base 83. The movable clamping rod 85 extends in the horizontal direction, and its extension direction is the same as that of the fixed clamping rod 86. The extension direction of the movable clamping rod 85 is towards the other side of the bag maker 4. The movable clamping rod 85 moves closer to or further away from the fixed clamping rod 86 in the horizontal direction along with the adjusting mounting base 83.

[0075] A spring rod 82 is laterally disposed at the other end of the front side of the pressure film mounting plate 81. One end of the spring rod 82 is connected to the adjustment mounting base 83. A compression spring is disposed inside the spring rod 82 and arranged along its axial direction. The compression spring applies an elastic force to the adjustment mounting base 83 in the direction of the fixed clamping rod 86. This elastic force pushes the movable clamping rod 85 toward the fixed clamping rod 86, so that the movable clamping rod 85 and the fixed clamping rod 86 jointly clamp the cylindrical film material passing between them with a preset pressure.

[0076] When the operator needs to manually release the clamping force on the cylindrical membrane material during membrane replacement or debugging, the spring rod 82 is pulled, compressing the spring and pulling the adjusting mounting seat 83 away from the fixed clamping rod 86. This creates sufficient gap between the moving clamping rod 85 and the fixed clamping rod 86 to allow the new membrane material to be inserted. After the membrane material is inserted, the external force on the adjusting mounting seat 83 is released. Under the elastic force of the spring in the spring rod 82, the adjusting mounting seat 83 automatically returns to its original position, causing the moving clamping rod 85 to press against the fixed clamping rod 86 again and clamp the cylindrical membrane material with a preset pressure. The membrane pulling and pressing mechanism 8 can adaptively adapt to membrane materials of different thicknesses and materials, eliminating the need for individual clamping force adjustments for each type of membrane material, thus improving the equipment's versatility and ease of use.

[0077] For details regarding the cutting mechanism 7 in this embodiment, please refer to the accompanying drawings. Figure 6 The lower cutter frame 71 is a frame-shaped component. The lower cutter frame 71 is located on the front side of the frame 1 and below the transverse heat sealing mechanism 6. The lower cutter frame 71 can be adjusted in position relative to the frame 1 in the vertical direction.

[0078] The fixed cutting blade 72 is fixedly installed at one end of the inner cavity of the lower cutting blade frame 71, with the cutting edge of the fixed cutting blade 72 facing the other end of the inner cavity of the lower cutting blade frame 71. The movable cutting blade 73 is rotatably installed at the other end of the inner cavity of the lower cutting blade frame 71, and the cutting edge of the movable cutting blade 73 can rotate with its center of rotation facing the cutting edge of the fixed cutting blade 72 when rotating.

[0079] When the cutting action is performed, the moving cutting blade 73 rotates around the rotation center towards the blade of the fixed cutting blade 72 under the action of the motor. The blades of the moving cutting blade 73 and the fixed cutting blade 72 make interlocking contact to cut the tubular film material that has been transversely heat-sealed between the two, so that the tubular film material is cut into two adjacent and separate bags.

[0080] The adjustment frame 74 is located on the front side of the frame 1 and is fixedly connected to the frame 1. The inner cavity of the adjustment frame 74 extends vertically.

[0081] The adjusting mounting plate 75 is disposed in the inner cavity of the adjusting frame 74. The adjusting mounting plate 75 can slide up and down relative to the adjusting frame 74 in the vertical direction. The inner side of the adjusting mounting plate 75 is fixedly connected to one end of the lower cutting frame 71. The lower cutting frame 71 moves vertically along with the adjusting mounting plate 75.

[0082] The lead screw 76 is vertically disposed in the inner cavity of the adjusting frame 74. The lower end of the lead screw 76 is rotatably supported at the bottom of the inner cavity of the adjusting frame 74. The lower end of the lead screw 76 extends out of the top of the adjusting frame 74 and is connected to a fixed motor or a hand-cranked operating wheel.

[0083] The lead screw sleeve 77 is threadedly engaged with the lead screw 76, and the lead screw sleeve 77 is fixedly connected to the outer side of the adjusting mounting plate 75. The inner cavity of the adjusting frame 74 is also provided with adjusting connecting blocks 78 that are respectively connected to the upper and lower ends of the lead screw sleeve 77. The outer side of the adjusting connecting block 78 is slidably connected to the inner wall of the adjusting frame 74 to prevent the lead screw sleeve 77 from rotating with the lead screw 76.

[0084] When it is necessary to adjust the position of the lower cutter frame 71 in the vertical direction, rotate the lead screw 76, and the lead screw sleeve 77 moves in the vertical direction along the lead screw 76. The lead screw sleeve 77 drives the lower cutter frame 71 to move up and down in the vertical direction through the adjustment mounting plate 75, thereby realizing the position adjustment of the fixed cutter 72 and the moving cutter 73 in the vertical direction relative to the transverse heat sealing mechanism 6. It can adapt to tubular film materials of different bag length specifications, so that the cutting position of the cutter mechanism 7 always corresponds to the position where the transverse heat sealing mechanism 6 completes the transverse heat sealing, ensuring that the two bags after cutting have complete top and bottom seals.

[0085] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0086] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A servo-driven continuous vertical packaging machine, comprising a frame, wherein the frame is sequentially provided with a film material conveying mechanism for conveying film material, a film material guiding mechanism, a bag maker for forming the film material into a tubular shape, a longitudinal heat-sealing mechanism for longitudinally heat-sealing the tubular film material, a transverse heat-sealing mechanism for transversely heat-sealing the tubular film material, and a cutting mechanism for cutting the heat-sealed bag; characterized in that, The transverse heat sealing mechanism is slidably mounted on the frame in the vertical direction, and the frame has a sliding groove for the transverse heat sealing mechanism to slide up and down; it also includes a drive mechanism disposed in the inner cavity of the frame, the drive mechanism being used to drive the transverse heat sealing mechanism to reciprocate up and down in the vertical direction; when the transverse heat sealing mechanism moves downward under the drive mechanism, it performs a transverse heat sealing action on the cylindrical film material, and works with the longitudinal heat sealing mechanism to convey the cylindrical film material downward.

2. The servo-driven continuous vertical packaging machine according to claim 1, characterized in that, The driving mechanism includes a servo motor, an eccentric mounting plate, an eccentric connecting rod, a spherical bearing connecting plate, a swing connecting plate, and several linear slide rails. The output shaft of the servo motor is fixedly connected to one end of the eccentric mounting plate, and both ends of the eccentric connecting rod are rotatably connected to the eccentric mounting plate and the spherical bearing connecting plate, respectively. The spherical bearing connecting plate is fixedly disposed on the rear side of the swing connecting plate, and the swing connecting plate is connected to the transverse heat sealing mechanism. The linear slide rails are disposed in the inner cavity of the frame, and the swing connecting plate is fixedly connected to the slider portion of the linear slide rails, so that the swing connecting plate can slide up and down along the linear slide rails.

3. A servo-driven continuous vertical packaging machine according to claim 1 or 2, characterized in that, The transverse heat-sealing mechanism includes a heat-sealing frame, in which two heat-sealing mounting plates are arranged in a relatively open manner. Each of the two heat-sealing mounting plates has a heat-sealing plate on its opposite side for heat-sealing the tubular film material. The bottom of the heat-sealing plate is connected to a gas clamping plate for venting gas from the bag.

4. A servo-driven continuous vertical packaging machine according to claim 1, characterized in that, The longitudinal heat-sealing mechanism includes an embossing heat-sealing assembly, an adjusting assembly, and a driving assembly. The embossing heat-sealing assembly includes two rotatably arranged rotating shafts and heat-sealing rings respectively sleeved on the two rotating shafts. The two heat-sealing rings are arranged opposite each other and can emboss and heat-seal the cylindrical film material. The adjusting assembly includes a fixed connecting block and a movable connecting block. The two rotating shafts pass through and are rotatably arranged on the fixed connecting block and the movable connecting block, respectively. The adjusting assembly also includes an adjusting cylinder for driving the movable connecting block to move closer to or further away from the fixed connecting block, so that the two heat-sealing rings can move closer to each other and press together during operation, and separate from each other when the machine stops.

5. A servo-driven continuous vertical packaging machine according to claim 4, characterized in that, The adjustment assembly also includes a limiting sleeve for limiting the moving distance of the moving connecting block, the limiting sleeve ensuring that the transmission between the two rotating shafts remains engaged at all times.

6. A servo-driven continuous vertical packaging machine according to claim 4, characterized in that, A heating element is provided inside the heat-sealing ring, and a rotary power supply device for continuously supplying power to the heating element is provided on the rotating shaft.

7. A servo-driven continuous vertical packaging machine according to claim 1, characterized in that, It also includes a film stretching and pressing mechanism, which includes a fixed clamping rod and a movable clamping rod arranged opposite to each other. The movable clamping rod can move closer to or further away from the fixed clamping rod to clamp the film material.

8. A servo-driven continuous vertical packaging machine according to claim 1, characterized in that, The cutting mechanism includes a lower cutting frame that is vertically adjustable and positioned at the front of the frame. The lower cutting frame contains a fixed cutting blade and a movable cutting blade that work together to cut the bag.

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