A mechanism for opening and closing a zipper bag packaging machine

Abstract

The application relates to a zipper bag opening and closing mechanism of a packaging machine and relates to the field of packaging machines. The mechanism comprises a placing part and an opening and closing part. The placing part comprises a placing frame, the upper end surface of the placing frame is provided with an opening, the vertical end surface of the two sides of the placing frame is provided with an opening, the rear end surface of the placing frame is fixed with a suction box at the opening, the end of the suction box is connected with a suction pump, the opening and closing part comprises a moving sliding frame, the moving sliding frame is symmetrically provided with two moving sliding frames, the two moving sliding frames are arranged on the two sides above the placing frame, an opening and closing double-end hydraulic cylinder is arranged between the two moving sliding frames, and the opening and closing double-end hydraulic cylinder is fixed on the adjacent end surfaces of the two moving sliding frames. The simplification of the execution element reduces the failure point, according to tests, the mechanism failure shutdown rate is reduced, the single continuous opening and closing operation time is reduced, the problem that the single element failure leads to the overall stagnation is completely solved, and the smoothness of the continuous opening and closing of the zipper bag is ensured.

Description

Technical Field

[0001] This application relates to the technical field of packaging machines, and in particular to an opening and closing mechanism for a zipper bag packaging machine. Background Technology

[0002] In the packaging industries of food, daily chemicals, and pharmaceuticals, zipper bags have become the mainstream packaging form for products such as snack foods, daily chemical products, and pharmaceuticals due to their advantages of resealability, moisture and dust protection, and ease of use. As the consumer market demands higher packaging efficiency and sealing performance, zipper bag packaging machines have upgraded from semi-automatic, manually assisted operation to fully automated continuous operation. Their core workflow includes bag making, feeding, sealing, opening and closing the bag opening, and finished product output. The opening and closing mechanism, as a key component controlling the precise separation and closure of the bag opening, directly determines the production efficiency and finished product qualification rate of the packaging machine. If the opening and closing mechanism cannot stably achieve bag opening separation, it will lead to subsequent material leakage during feeding; if the closing precision is insufficient, it will affect the sealing performance of the zipper bag, causing the product to become damp and deteriorate.

[0003] Currently, the opening and closing mechanism of mainstream zipper bag packaging machines generally adopts a composite structure design of vacuum suction cups and mechanical grippers. First, the vacuum suction cups adsorb the film on both sides of the zipper bag opening, and the cylinder drives the suction cups to move in the opposite direction to achieve initial separation of the bag opening. After the bag opening is opened to the preset width, the mechanical grippers clamp the two sides of the bag opening to keep the bag opening open to cooperate with the subsequent feeding process. After the feeding is completed, the grippers are released, and another set of cylinders drives the bag opening to close, completing the packaging process.

[0004] Regarding the aforementioned technologies, the inventors discovered that traditional opening and closing mechanisms require the simultaneous coordination of multiple actuators, including a vacuum system, two sets of cylinders, and position sensors. The timing of each actuator's actions must be strictly matched. It is necessary to first confirm that the suction cup is firmly attached before the cylinder can be activated to drive the suction cup to separate. Only after separation can the gripper be triggered to clamp. After the material is loaded, the gripper must be released before the bag opening can be closed. This multi-stage dependent control logic not only increases the programming complexity of the control system but also makes the entire mechanism prone to stalling due to the failure of a single component, affecting the smoothness of continuous opening and closing of zipper bags. Utility Model Content

[0005] To overcome the limitations of traditional opening and closing mechanisms that require simultaneous coordination of multiple actuators such as a vacuum system, two sets of cylinders, and position sensors, and where the timing of each actuator's actions must be strictly matched, such as confirming that the suction cup is firmly attached before activating the cylinder to drive the suction cup to separate, and triggering the gripper to clamp after separation; and after feeding, the gripper must be released before driving the bag opening to close, this multi-stage dependent control logic not only increases the programming complexity of the control system, but also makes it easy for the entire mechanism to stop due to the failure of a single component, affecting the smoothness of continuous opening and closing of zipper bags, this application provides an opening and closing mechanism for a zipper bag packaging machine.

[0006] The opening and closing mechanism of the zipper bag packaging machine provided in this application adopts the following technical solution: An opening and closing mechanism for a zipper bag packaging machine includes a placement component and an opening and closing component. The placement component includes a placement frame, with an opening on the upper end face and openings on both vertical ends of the placement frame. A suction box is fixed at the opening on the rear end face of the placement frame, and a suction pump is fixedly connected to the end of the suction box. The opening and closing component includes two movable slide frames, which are symmetrically arranged and respectively positioned on the upper sides of the placement frame. A double-headed hydraulic cylinder for opening and closing is arranged between the two movable slide frames and is fixed to the adjacent end faces of the two movable slide frames. Two opening and closing slide plates are symmetrically arranged between the two movable slide frames, and the two ends of the two opening and closing slide plates are slidably assembled onto the two movable slide frames. The output end of the double-headed hydraulic cylinder for opening and closing is fixed to the adjacent end faces of the two opening and closing slide plates, and an opening and closing toothed plate is fixed to the side of each of the two opening and closing slide plates near the placement frame. A support frame is arranged on the outer side of each of the two movable slide frames, and one end of the support frame is fixed to the outer wall of the placement frame.

[0007] By adopting the above technical solution, the placement frame is used to accommodate the items to be packaged, and its openings on both sides and the top facilitate the insertion and removal of items. The suction box and suction pump work together to remove air from the placement frame, creating a vacuum environment that helps improve packaging effectiveness. The movable sliding frame, acting as a sliding support, is fixed to the upper sides of the placement frame to ensure stable movement of the opening and closing mechanism. The dual-head hydraulic cylinder drives the opening and closing slide plate to open and close the top of the placement frame, thereby opening or closing the upper surface of the placement frame and achieving a sealed package of the items by the suction box. The opening and closing toothed plate enhances the sealing performance between the opening and closing slide plate and the placement frame. The support frame not only provides additional support but also allows the opening and closing mechanism to operate smoothly. After the suction pump evacuates the vacuum box, the air inside the placement frame is extracted, and then the dual-head hydraulic cylinder pushes the opening and closing slide plate closer to or further away from the placement frame, completing the packaging process.

[0008] Optionally, both sides of the outer wall of the placement frame are vertically fixed with mounting bases, and the mounting bases are locked in place by fixing screws.

[0009] By adopting the above technical solution, the placement frame achieves positional fixation and adjustment through vertically fixed seats on both sides of its outer wall. The fixed seats are securely locked to the external structure with screws, ensuring the stability of the placement frame in its fixed position. The placement frame is used to hold or fix other components or items. The design of the fixed seats provides a convenient installation and fixing method, while the fixing screws ensure the reliability and firmness of this fixing method.

[0010] Optionally, a discharge groove is provided through the bottom surface of the placement frame, and sliding grooves are provided on both sides of the discharge groove of the placement frame, and a pull-out slide plate is horizontally assembled in the sliding groove of the placement frame.

[0011] By adopting the above technical solution, the placement frame serves as the main container for carrying the components to be processed. The discharge groove on its bottom surface facilitates the discharge of waste or finished products after processing. The sliding grooves on both sides provide tracks for the sliding plate, allowing the sliding plate to move in and out horizontally, which facilitates the discharge of the zipper bag after filling.

[0012] Optionally, a mesh frame is vertically fixed at the front opening of the placement frame, and a pull-out hydraulic cylinder is horizontally fixed on the bottom surface of the mesh frame, with the output end of the pull-out hydraulic cylinder fixed on the pull-out slide plate.

[0013] By adopting the above technical solution, the mesh frame is located at the front opening of the placement frame, which serves as a support and prevents the components from accidentally sliding out during processing; the pull-out hydraulic cylinder drives the pull-out slide plate to move horizontally through the push and pull of its output end, realizing the rapid loading and unloading of components.

[0014] Optionally, a mesh is fixed at the opening of the suction box.

[0015] By adopting the above technical solution, the mesh is used to prevent the zipper bag from entering the suction box, and the negative pressure generated by the suction box ensures the stability of the zipper bag's opening and closing after the sealing process.

[0016] Optionally, a translational slide is fixed to the side of the movable slide close to the placement frame, and a screw hole seat is fixed to the end of the translational slide away from the movable slide.

[0017] By adopting the above technical solution, a translational slide is installed on the side of the movable slide close to the placement frame, thereby achieving overall horizontal movement. A threaded hole seat is fixed at the other end of the translational slide for threaded engagement with the translational screw.

[0018] Optionally, a slider is fixed to the other end of the support frame, and the slider is slidably assembled with the translation slide frame.

[0019] By adopting the above technical solution, a slider is installed at the other end of the support frame, which enables it to achieve smooth relative movement between the slider and the translational sliding frame.

[0020] Optionally, a translation motor is fixed on the other end face of the support frame, and the output end of the translation motor is fixed on the translation screw, and the translation screw is threadedly engaged with the screw hole seat.

[0021] By adopting the above technical solution, a translation motor is installed on the other end face of the support frame. Its operation drives the translation screw to rotate. The translation screw passes through a screw hole seat and engages with it threadedly. At this time, the motor drives the screw to rotate, transmitting power through the thread, causing the moving slide frame to translate along the slider direction, thereby achieving precise adjustment and positioning of the entire device in the horizontal direction.

[0022] In summary, this application includes at least one of the following beneficial technical effects: By integrating power and simplifying the motion chain, the stability and smoothness of the opening and closing process are significantly improved. Traditional mechanisms require coordination of more than five sets of components, including vacuum suction cups, separation cylinders, gripper cylinders, and position sensors. This technology achieves opening and closing using only three core actuators: "negative pressure adsorption of the suction box, dual-head hydraulic cylinders for opening and closing, and translation motor." In the negative pressure adsorption stage, the negative pressure system composed of the suction box and the suction pump replaces the traditional vacuum suction cup. No additional adsorption detection sensors are needed. After negative pressure is formed, the zipper bag naturally adheres tightly to the back wall of the placement frame. The adsorption status can be intuitively judged by the negative pressure value, without the need for complex signal feedback. Opening and closing drive... In the opening and closing process, the dual-head hydraulic cylinders synchronously drive two opening and closing slide plates, replacing the independent drive of the traditional separate cylinders and gripper cylinders. This eliminates the need for timing matching between the two sets of cylinders. In the translation drive process, the translation motor drives the moving slide frame through the translation screw, replacing the combination of the traditional translation cylinder and position sensor. The action completion signal can be directly obtained through the motor encoder, eliminating the need for additional sensors. The simplification of the actuators reduces the number of failure points. According to tests, the downtime rate due to mechanism failure has decreased, and the duration of a single continuous opening and closing operation has been reduced. This completely solves the problem of overall stagnation caused by the failure of a single component, ensuring the smooth continuous opening and closing of the zipper bag. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram of the overall structure of the embodiment of this application in an exploded state; Figure 3 This is a schematic diagram of the structure of the placement component in the disassembled state according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the opening and closing component in the disassembled state according to an embodiment of this application; Figure 5 This is a schematic diagram of the movable slider in the exploded state according to an embodiment of this application.

[0024] Explanation of reference numerals in the attached drawings: 1. Placement component; 11. Placement frame; 111. Fixing base; 112. Fixing screw; 113. Slide groove; 114. Pull-out slide plate; 12. Suction box; 121. Mesh sheet; 13. Suction pump; 14. Mesh frame; 15. Pull-out hydraulic cylinder; 2. Opening and closing component; 21. Moving slide frame; 211. Translation slide frame; 212. Screw hole seat; 22. Opening and closing double-headed hydraulic cylinder; 23. Opening and closing slide plate; 24. Opening and closing toothed plate; 25. Support frame; 251. Slider; 252. Translation motor; 253. Translation screw. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the accompanying drawings.

[0026] This application discloses an opening and closing mechanism for a zipper bag packaging machine. (Refer to...) Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 An opening and closing mechanism for a zipper bag packaging machine includes a placement component 1 and an opening and closing component 2. The placement component 1 includes a placement frame 11, with an opening on the upper end face and openings on both vertical ends of the placement frame 11. A suction box 12 is fixed to the opening on the rear end face of the placement frame 11, and a suction pump 13 is fixedly connected to the end of the suction box 12. The opening and closing component 2 includes two movable slide frames 21, which are symmetrically arranged and respectively located on the upper sides of the placement frame 11. A double-headed hydraulic cylinder for opening and closing is arranged between the two movable slide frames 21. 22, and the opening and closing double-headed hydraulic cylinder 22 is fixed on the adjacent end faces of the two movable slide frames 21. Two opening and closing slide plates 23 are symmetrically arranged between the two movable slide frames 21, and the two ends of the two opening and closing slide plates 23 are respectively slidably assembled on the two movable slide frames 21. The output end of the opening and closing double-headed hydraulic cylinder 22 is fixed on the adjacent end faces of the two opening and closing slide plates 23. The opening and closing toothed plates 24 are fixed on the side of the two opening and closing slide plates 23 near the placement frame 11. Support frames 25 are provided on the outer side of the two movable slide frames 21, and one end of the support frame 25 is fixed on the outer wall of the placement frame 11.

[0027] By adopting the above technical solution, the placement frame 11 is used to accommodate the items to be packaged, and the openings on its sides and top surface facilitate the insertion and removal of the items. The suction box 12 and the suction pump 13 work together to remove air from the placement frame 11, creating a vacuum environment, which helps improve the packaging effect. The movable sliding frame 21, as a sliding support, is fixed on both sides above the placement frame 11 to ensure stable movement of the opening and closing components. The opening and closing double-headed hydraulic cylinder 22 drives the opening and closing slide plate 23 to achieve the opening and closing action on the top of the placement frame 11, thereby opening or closing the top surface of the placement frame 11, thus achieving the sealing and packaging of the items by the suction box 12. The opening and closing toothed plate 24 enhances the sealing performance of the contact surface between the opening and closing slide plate 23 and the placement frame 11. The support frame 25 not only provides additional support but also enables the opening and closing components to perform smooth opening and closing actions. In terms of working principle, after the suction pump 13 draws a vacuum through the suction box 12, the air in the placement frame 11 is extracted. Then, the opening and closing double-headed hydraulic cylinder 22 pushes the opening and closing slide plate 23 to move closer to or away from the placement frame 11 to complete the sealing action.

[0028] Reference Figure 3The placement frame 11 has vertically fixed mounting bases 111 on both sides of its outer wall, and the mounting bases 111 are locked in place by fixing screws 112. The placement frame 11 achieves positional fixation and adjustment through the vertically fixed mounting bases 111 on both sides of its outer wall. The mounting bases 111 are firmly locked to the external structure by screws 112, ensuring the stability of the placement frame 11 in its fixed position. The placement frame 11 is used to hold or fix other components or items. The design of the mounting bases 111 provides a convenient installation and fixing method, while the fixing screws 112 ensure the reliability and firmness of this fixing method.

[0029] Reference Figure 3 A discharge trough is formed through the bottom surface of the placement frame 11, and horizontal sliding grooves 113 are formed on both sides of the discharge trough. A pull-out slide plate 114 is horizontally assembled in the sliding grooves 113 of the placement frame 11. The placement frame 11 serves as the main container for holding the components to be processed. The discharge trough on its bottom surface facilitates the discharge of waste or finished products after processing. The sliding grooves 113 on both sides provide tracks for the sliding of the pull-out slide plate 114, allowing the pull-out slide plate 114 to move horizontally in and out, facilitating the discharge of zipper bags after filling. A wire mesh frame 14 is vertically fixed at the front opening of the placement frame 11, and a pull-out hydraulic cylinder 15 is horizontally fixed on the bottom surface of the wire mesh frame 14. The output end of the pull-out hydraulic cylinder 15 is fixed to the pull-out slide plate 114. The mesh frame 14 is located at the front opening of the placement frame 11, which serves as a support and prevents the components from accidentally sliding out during processing; the pull-out hydraulic cylinder 15 drives the pull-out slide plate 114 to move horizontally through the push and pull of its output end, realizing the rapid loading and unloading of components.

[0030] Reference Figure 3 A mesh 121 is fixed at the opening of the suction box 12. The mesh 121 is used to prevent the zipper bag from entering the suction box 12, and the negative pressure generated by the suction box 12 ensures the stability of the zipper bag's opening and closing after it is sealed.

[0031] Reference Figure 4 and Figure 5A sliding slide 21 is fixed to the side of the movable slide 21 closest to the placement frame 11, and a screw seat 212 is fixed to the end of the sliding slide 21 away from the movable slide 21. The sliding slide 211 is installed on the side of the movable slide 21 closest to the placement frame 11, and the horizontal movement of the whole is achieved through it. A screw seat 212 is fixed to the other end of the sliding slide 211 for threaded engagement with the translation screw. A slider 251 is fixed to the other end of the support frame 25, and the slider 251 is slidably assembled with the sliding slide 211. A slider 251 is installed on the other end of the support frame 25, which allows it to achieve smooth relative movement between the slider and the sliding slide 211. A translation motor 252 is fixed to the other end face of the support frame 25, and the output end of the translation motor 252 is fixed to the translation screw 253, and the translation screw 253 is threadedly engaged with the screw seat 212. A translation motor 252 is installed on the other end face of the support frame 25. Its operation drives the translation screw 253 to rotate. The translation screw 253 passes through the screw hole seat 212 and is threadedly engaged with it. At this time, the motor drives the screw to rotate, and the power is transmitted through the thread, which drives the moving slide frame 21 to move in the direction of the slider 251, thereby realizing the precise adjustment and positioning of the entire device in the horizontal direction.

[0032] The implementation principle of the opening and closing mechanism of a zipper bag packaging machine according to an embodiment of this application is as follows: First, vertically insert the zippered bag that needs to be opened into the placement frame 11 of the placement component 1. Then, start the suction pump 13 on the suction box 12. Air enters the suction box 12 and generates negative pressure at the opening. The negative pressure causes the zippered bag to stick tightly to the inner rear wall of the placement frame 11. Then, the opening and closing double-headed hydraulic cylinder 22 in the opening and closing component 2 is activated to pull the two opening and closing slide plates 23 to move towards each other in the two moving slide frames 21, causing the opening and closing toothed plates 24 on the two opening and closing slide plates 23 to close tightly. The translation motor 252 on the starting support frame 25 drives the translation screw 253 to rotate, driving the translation slide frame 211 on the moving slide frame 21 to slide towards the placement frame 11 on the slider 251, so that the closed opening and closing toothed plates 24 are inserted into the opening of the zipper bag. Then, the opening and closing double-headed hydraulic cylinder 22 is activated to extend, pushing the two opening and closing slide plates 23 to move towards each other in the two moving slide frames 21, causing the opening and closing toothed plates 24 on the two opening and closing slide plates 23 to open and close, opening the zipper bag and filling it with materials. Finally, the hydraulic cylinder 15 is activated to drive the sliding plate 114 to slide, opening the discharge chute at the bottom of the placement frame 11 and discharging the filled zipper bag.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An opening and closing mechanism for a zipper bag packaging machine, characterized in that, The device includes a placement component (1) and an opening / closing component (2). The placement component (1) includes a placement frame (11), the upper end face of which is open, and the vertical end faces on both sides of the placement frame (11) are also open. A suction box (12) is fixed at the opening on the rear end face of the placement frame (11), and a suction pump (13) is fixedly connected to the end of the suction box (12). The opening / closing component (2) includes a movable slide frame (21), two movable slide frames (21) are symmetrically arranged, and the two movable slide frames (21) are respectively arranged on the upper sides of the placement frame (11). A double-headed hydraulic cylinder (22) is arranged between the two movable slide frames (21). The opening and closing double-headed hydraulic cylinder (22) is fixed on the adjacent end faces of the two movable slide frames (21). Two opening and closing slide plates (23) are symmetrically arranged between the two movable slide frames (21), and the two ends of the two opening and closing slide plates (23) are respectively slidably assembled on the two movable slide frames (21). The output end of the opening and closing double-headed hydraulic cylinder (22) is fixed on the adjacent end faces of the two opening and closing slide plates (23). The two opening and closing slide plates (23) are fixed with opening and closing tooth plates (24) on the side near the placement frame (11). The outer sides of the two movable slide frames (21) are provided with support frames (25), and one end of the support frame (25) is fixed on the outer wall of the placement frame (11).

2. The opening and closing mechanism of a zipper bag packaging machine according to claim 1, characterized in that: The outer walls of the placement frame (11) are vertically fixed with mounting bases (111) on both sides, and the mounting bases (111) are locked and fixed by fixing screws (112).

3. The opening and closing mechanism of a zipper bag packaging machine according to claim 1, characterized in that: The bottom surface of the placement frame (11) is provided with a discharge groove, and both sides of the discharge groove of the placement frame (11) are provided with horizontal sliding grooves (113), and a pull-out slide plate (114) is horizontally slidably assembled in the sliding groove (113) of the placement frame (11).

4. The opening and closing mechanism of a zipper bag packaging machine according to claim 3, characterized in that: A mesh frame (14) is vertically fixed at the front opening of the placement frame (11), and a pull-out hydraulic cylinder (15) is horizontally fixed on the bottom surface of the mesh frame (14), and the output end of the pull-out hydraulic cylinder (15) is fixed on the pull-out sliding plate (114).

5. The opening and closing mechanism of a zipper bag packaging machine according to claim 1, characterized in that: A mesh (121) is fixed at the opening of the suction box (12).

6. The opening and closing mechanism of a zipper bag packaging machine according to claim 1, characterized in that: The movable slide frame (21) is fixed with a translation slide frame (211) on the side near the placement frame (11), and a screw hole seat (212) is fixed at the end of the translation slide frame (211) away from the movable slide frame (21).

7. The opening and closing mechanism of a zipper bag packaging machine according to claim 6, characterized in that: The other end of the support frame (25) is fixed with a slider (251), and the slider (251) is slidably assembled with the translation slide frame (211).

8. The opening and closing mechanism of a zipper bag packaging machine according to claim 7, characterized in that: A translation motor (252) is fixed on the other end face of the support frame (25), and the output end of the translation motor (252) is fixed on the translation screw (253), and the translation screw (253) is threaded through the screw hole seat (212).

Images