Packing bag preforming device

Abstract

The invention discloses a packaging bag pre-forming device which comprises a lifting driving unit, a conveying unit and a pre-forming unit. The heat sealing unit comprises a first pressing module and a second pressing module which are oppositely arranged, the first pressing module is connected with the lifting driving unit, the second pressing module is arranged on the base, and at least one of the first pressing module and the second pressing module is provided with a heater; the cutting unit comprises a cutting module and a base plate module which are oppositely arranged, the cutting module is connected with the lifting driving unit, and the base plate module is arranged on the base; the opening tearing unit comprises a tearing module and a bottom padding module which are oppositely arranged, the tearing module is connected with the lifting driving unit, and the bottom padding module is arranged on the base; the lifting driving unit can drive the first pressing module, the cutting module and the tearing module to synchronously ascend and descend, and heat sealing, opening cutting and opening tearing work can be synchronously completed. The three functions are integrated, the number of devices is greatly reduced, the purchasing cost of the devices is reduced, and meanwhile the overall size and the occupied space are remarkably reduced.

Description

Technical Field

[0001] The present application relates to the technical field of packaging equipment, and in particular to a packaging bag preforming device. Background Art

[0002] In the existing logistics and express packaging line process, pre-formed tubular film bags with continuous tear-off are a crucial component. Their quality and efficiency directly impact the smoothness of subsequent package packaging and the safety of packages during transportation. Currently, the operation of pre-formed tubular film bags with continuous tear-off consists of three key steps: hot-melt sealing the bag base, breaking the line at the cutting point to form the bag opening, and breaking the line at the tearing point to open the bag opening.

[0003] Heat-melting the bottom of a bag requires specialized hot-melt equipment. This equipment precisely controls temperature and pressure parameters to melt the bottom of the tubular film, creating a secure bottom and preventing packages from leaking out. Cutting the breakline to form the bag opening requires precise cutting of the breakline at a specific location on the tubular film using cutting equipment. Tearing the breakline to open the bag involves manually or using a specialized device to tear along the pre-cut breakline to open the bag when the package is ready to be loaded. This step requires precise cutting of the breakline and controlled tearing force.

[0004] However, the current technology for pre-forming and tearing tube film bags has significant flaws in its equipment configuration. Specifically, because the three steps mentioned above are independent of each other, three different devices are required to complete the corresponding operations. In terms of equipment complexity, the three devices each have independent control systems, transmission mechanisms, and operating procedures. The coordinated operation of the devices requires complex debugging and docking, which greatly increases the difficulty and technical requirements of operation. In terms of cost, purchasing three devices with different functions means high equipment procurement costs. Moreover, each device consumes electricity during operation and requires regular maintenance and replacement of parts. These long-term operating costs accumulate and impose a heavy financial burden on logistics companies. In terms of equipment size, the three devices each occupy a certain amount of space, and the overall layout requires a larger site to accommodate them. In a space-limited environment such as a logistics warehouse, the large-scale equipment layout not only takes up a large amount of valuable storage space but also may affect the smooth flow of logistics operations.

[0005] In summary, the existing technology for pre-forming and tearing bags made of tubular film in logistics and express packaging lines has defects such as complex equipment configuration, high cost, and large size. Summary of the Invention

[0006] The purpose of the embodiments of the present invention is to provide a packaging bag preforming device that can solve the above-mentioned problems existing in the prior art.

[0007] To achieve the above objectives, this application adopts the following technical solutions: A packaging bag preforming device, comprising: A frame, comprising a base and a mounting frame mounted on the base; A lifting drive unit is installed on the mounting frame; The heat sealing unit includes a first pressing module and a second pressing module arranged opposite to each other, the first pressing module is connected to the lifting drive unit, the second pressing module is arranged on the base, and at least one of the first pressing module and the second pressing module is provided with a heater; The cutting unit comprises a cutting module and a pad module which are arranged opposite to each other, wherein the cutting module is connected to the lifting drive unit, and the pad module is arranged on the base; The opening unit includes a tearing module and a bottoming module which are arranged opposite to each other, wherein the tearing module is connected to the lifting drive unit, and the bottoming module is arranged on the base; The lifting drive unit can drive the first pressing module, the cutting module and the tearing module to rise and fall synchronously, thereby achieving the synchronous completion of heat sealing, cutting and tearing operations.

[0008] Optionally, the tearing module includes a friction roller. When the friction roller cooperates with the bottom module to compress the packaging bag, the rotating friction roller can tear the bag open through friction.

[0009] Optionally, the tearing module includes a first base and a second base, the first base is connected to the lifting drive unit, and the second base is liftably mounted on the first base; Among them, the first seat body is equipped with a push-turn block; the friction roller is rotatably installed on the second seat body, and the friction roller is equipped with a shift block and a reset spring. When the friction roller descends to cooperate with the bottom module to press the packaging bag, the first seat body that continues to descend drives the push-turn block to descend, and the push-turn block pushes the friction roller to rotate through the shift block to realize tearing the opening; when the push-turn block moves upward relative to the shift block, the reset spring drives the shift block to rotate and reset.

[0010] Optionally, the shift block is connected to the friction roller via a one-way ratchet, so that the shift block can drive the friction roller to rotate via the one-way ratchet, and the shift block can rotate and reset independently relative to the friction roller.

[0011] Optionally, one end of the return spring is connected to the shift block, and the other end is connected to the second seat body, so as to drive the friction roller to rotate through the shift block.

[0012] Optionally, the second seat is installed with a limit block that cooperates with the shift block, and the limit block is used to limit the reset position of the shift block, so that the shift block is in a position that can be triggered by the push-turn block after being reset.

[0013] Optionally, the first base body includes a top fixing plate and a first vertical plate, the top fixing plate is connected to the lifting drive unit, and the first vertical plate is connected to the top fixing plate and extends vertically downward; the second base body includes a second vertical plate and two clamping plates connected to both ends of the second vertical plate, the clamping plates extend downward relative to the second vertical plate, and each of the clamping plates is installed with a bearing, and the two ends of the friction roller are respectively connected to the two bearings; A guide shaft is installed on the side of the first vertical plate close to the second vertical plate, and a slide is installed on the side of the second vertical plate close to the first vertical plate. The slide is slidably connected to the guide shaft to guide the lifting movement of the second base relative to the first base.

[0014] Optionally, the cutting module includes a serrated blade and a blade holder, and the blade holder is connected to the lifting drive unit, so that the lifting drive unit can drive the serrated blade to move up and down through the blade holder; the pad module is integrally formed on the base, and the pad module is provided with a knife avoidance groove corresponding to the serrated blade, and the knife avoidance groove is located between the second clamping module and the bottom pad module.

[0015] Optionally, the first pressing module includes a flexible pressing strip and a pressing strip seat, the pressing strip seat is connected to the lifting drive unit, so that the lifting drive unit can drive the flexible pressing strip to move up and down through the pressing strip seat; the second pressing module is integrally formed on the base, and the second pressing module is provided with a first mounting groove, and the heater is installed in the first mounting groove; Alternatively, the first pressing module comprises a heater seat and the heater, the heater seat is connected to the lifting drive unit, and the heater is installed on the heater seat; the second pressing module is integrally formed on the base, the second pressing module is provided with a first mounting groove, and a flexible pad is installed in the first mounting groove (121).

[0016] Optionally, the lifting drive unit includes a motor, a ball screw and a lifting plate. The motor is fixedly mounted on the frame and connected to the screw of the ball screw. The lifting plate is connected to the nut of the ball screw. The first clamping module, the cutting module and the tearing module are respectively connected to the lifting plate.

[0017] The beneficial effects of the present application are as follows: Compared with the traditional tube film pre-forming and tearing bag technology, which requires three separate devices to complete the three steps of heat-melting the bag bottom, cutting the line to form the bag opening, and tearing the line to open the bag opening, the packaging bag pre-forming device of the present application integrates these three functions into one device, greatly reducing the number of devices and reducing the equipment procurement cost. Due to the integration of the equipment, the overall size and occupied space are significantly reduced. In limited space environments such as logistics warehouses, it can save valuable storage space, improve space utilization, and help logistics companies achieve an efficient and intensive production model. In addition, the lifting drive unit drives multiple modules to rise and fall synchronously, realizing the simultaneous completion of heat sealing, cutting, and tearing, thereby simplifying the operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application is further described in detail below with reference to the accompanying drawings and examples.

[0019] Figure 1 This is a structural schematic diagram of a packaging bag preforming device according to an embodiment of the present application from one perspective; Figure 2 This is a structural schematic diagram of the packaging bag preforming device according to an embodiment of the present application from another perspective; Figure 3 This is an exploded schematic diagram of the packaging bag preforming device according to an embodiment of the present application; Figure 4 for Figure 3 An exploded schematic diagram of the structure shown; Figure 5 This is a schematic diagram of the structure of the packaging bag preforming device according to an embodiment of the present application after the frame is hidden; Figure 6 for Figure 5 a longitudinal cross-sectional view of the structure shown; Figure 7 for Figure 5 An exploded schematic diagram of the structure shown; Figure 8 for Figure 7 A schematic structural diagram of the structure shown from another perspective; Figure 9 This is a structural diagram of the first compression module in an embodiment of the present application; Figure 10 for Figure 9 A schematic structural diagram of the structure shown from another perspective; Figure 11 This is a schematic structural diagram of the cutting module according to an embodiment of the present application; Figure 12 This is a structural diagram of the tear-away module according to an embodiment of the present application; Figure 13 for Figure 12 A schematic structural diagram of the structure shown from another perspective; Figure 14 for Figure 12 An exploded schematic diagram of the structure shown; Figure 15 A cross-sectional view of the installation structure of the tear-away module according to an embodiment of the present application; Figure 16 This is a schematic diagram of the installation structure of the friction roller described in the embodiment of the present application; Figure 17 for Figure 16 An exploded schematic diagram of the structure shown; Figure 18 It is a continuous tearing bag structure processed and formed by the packaging bag preforming device of the embodiment of the present application.

[0020] In the picture: 1. Frame; 11. Mounting frame; 111. Crossbeam; 112. Vertical support plate; 1121. Guide rail; 12. Base; 121. First mounting slot; 122. Knife avoidance slot; 123. Second mounting slot; 2. Lifting drive unit; 21. Motor; 22. Ball screw; 23. Lifting plate; 3. First pressing module; 31. Beading seat; 32. Flexible beading; 33. First guide assembly; 34. First buffer spring; 4. Cutting module; 41. Serrated blade; 42. Knife seat; 43. Second guide assembly; 44. Second buffer spring; 5. Opening die Block; 51, friction roller; 511, shift block; 512, return spring; 513, bearing; 514, limit block; 52, first seat body; 521, first vertical plate; 522, top fixing plate; 53, second seat body; 531, second vertical plate; 532, clamping plate; 54, push-turn block; 551, guide shaft; 552, slide seat; 56, pressure transmission assembly; 561, limit strip; 562, limit rod; 563, limit nut; 564, limit seat; 565, first transfer spring; 566, second transfer spring; 6, punching unit; 7, bottom pad module. DETAILED DESCRIPTION

[0021] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0022] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0023] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0024] With the rapid rise of the e-commerce industry and the continuous expansion of logistics business, the processing volume of logistics express parcels is growing at an alarming rate. This trend has put forward more stringent requirements on the efficiency, cost and space utilization of logistics express packaging lines, prompting the entire industry to continuously seek technological breakthroughs and innovations to adapt to the increasingly fierce market competition.

[0025] In the existing logistics and express packaging line process, pre-formed tubular film bags with continuous tear-off are a crucial component. Their quality and efficiency directly impact the smoothness of subsequent package packaging and the safety of packages during transportation. Currently, the operation of pre-formed tubular film bags with continuous tear-off consists of three key steps: hot-melt sealing the bag base, breaking the line at the cutting point to form the bag opening, and breaking the line at the tearing point to open the bag opening.

[0026] Heat-melting the bottom of a bag requires specialized hot-melt equipment. This equipment precisely controls temperature and pressure parameters to melt the bottom of the tubular film, creating a secure bottom and preventing packages from leaking out. Cutting the breakline to form the bag opening requires precise cutting of the breakline at a specific location on the tubular film using cutting equipment. Tearing the breakline to open the bag involves manually or using a specialized device to tear along the pre-cut breakline to open the bag when the package is ready to be loaded. This step requires precise cutting of the breakline and controlled tearing force.

[0027] However, the current technology for pre-forming and tearing tube film bags has significant flaws in its equipment configuration. Specifically, because the three steps mentioned above are independent of each other, three different devices are required to complete the corresponding operations. In terms of equipment complexity, the three devices each have independent control systems, transmission mechanisms, and operating procedures. The coordinated operation of the devices requires complex debugging and docking, which greatly increases the difficulty and technical requirements of operation. In terms of cost, purchasing three devices with different functions means high equipment procurement costs. Moreover, each device consumes electricity during operation and requires regular maintenance and replacement of parts. These long-term operating costs accumulate and impose a heavy financial burden on logistics companies. In terms of equipment size, the three devices each occupy a certain amount of space, and the overall layout requires a larger site to accommodate them. In a space-limited environment such as a logistics warehouse, the large-scale equipment layout not only takes up a large amount of valuable storage space but also may affect the smooth flow of logistics operations.

[0028] In summary, the existing technology for pre-forming and tearing bags made of tubular film in logistics and express packaging lines has defects such as complex equipment configuration, high cost, and large size.

[0029] In order to overcome the above technical problems, such as Figures 1-4 As shown, an embodiment of the present application provides a packaging bag preforming device, comprising a frame 1, a lifting drive unit 2, a heat sealing unit, a cutting unit, and a tearing unit. The packaging bag preforming device provided in the present application is used to preform a long roll of film into multiple continuous tear-off bags, which can be torn along the point-break lines of the continuous tear-off bag to obtain multiple independent packaging bags. The heat sealing, cutting, and tearing operations are specifically designed. The packaging bags can be used to package various products, such as express packaging and product packaging.

[0030] In the specific structure, the frame 1 includes a base 12 and a mounting frame 11 installed on the base 12; the frame 1 serves as the basic supporting structure of the entire device, including the base 12 and the mounting frame 11 installed on the base 12. The base 12 provides a stable installation foundation for other units to ensure the stability of the device during operation; the mounting frame 11 is used to install the lifting drive unit 2 and other related units, and plays a role in bearing and positioning.

[0031] The lifting drive unit 2 is installed on the mounting frame 11 and is the power core of the device. It can drive the first compression module 3 of the heat sealing unit, the cutting module 4 of the incision unit, and the tearing module 5 of the tearing unit to rise and fall synchronously, providing power support for the simultaneous implementation of multiple processes of pre-forming the packaging bags.

[0032] The heat sealing unit includes a first pressing module 3 and a second pressing module arranged opposite to each other. The first pressing module 3 is connected to the lifting drive unit 2, and the second pressing module is arranged on the base 12. At least one of the first pressing module 3 and the second pressing module is provided with a heater. The first pressing module 3 is connected to the lifting drive unit 2 and can move up and down under the drive of the lifting drive unit 2. The second pressing module is arranged on the base 12 and maintains a fixed position. At least one of the first pressing module 3 and the second pressing module is provided with a heater. The heater generates heat, and when the two modules are pressed together, the bottom of the packaging bag is hot-melt sealed to form a heat-sealed strip at the bottom of the bag. The heater is generally a strip-shaped structure, which can be a heating wire, a heat-conducting strip with a heating element, or the like.

[0033] The cutting unit includes a cutting module 4 and a pad module that are relatively arranged. The cutting module 4 is connected to the lifting drive unit 2, and the pad module is arranged on the base 12; the cutting module 4 is connected to the lifting drive unit 2 and can be lifted and lowered therewith; the pad module is arranged on the base 12 to provide cutting support for the packaging bag. The cutting module 4 and the pad module cooperate to cut a point break line on the packaging bag to form a point break line incision.

[0034] The tearing opening unit includes a tearing module 5 and a bottoming module 7 that are relatively arranged. The tearing opening module 5 is connected to the lifting drive unit 2, and the bottoming module 7 is arranged on the base 12; the tearing opening module 5 is connected to the lifting drive unit 2 and can be lifted and lowered synchronously; the bottoming module 7 is arranged on the base 12 to provide support for the tearing operation of the tearing opening module 5. The tearing opening unit is used to open one side of the packaging bag based on the point-break line opening to form an opening that is convenient for loading.

[0035] The lifting drive unit 2 can drive the first pressing module 3, the cutting module 4 and the tearing module 5 to rise and fall synchronously, thereby completing the heat sealing, cutting and tearing operations synchronously.

[0036] Specifically, in the device of this embodiment, the heat sealing unit, the cutting unit and the tearing unit are arranged in sequence. During the operation, the packing bag to be torn open is the current bag body. Figure 18 The specific workflow is as follows: (1) The lifting drive unit 2 moves downward: The lifting drive unit 2 drives downward once, driving the first pressing module 3, the cutting module 4 and the tearing module 5 to move downward simultaneously; (2) Heat sealing operation: During the descent process, the first pressing module 3 and the second pressing module of the heat sealing unit approach each other and press each other, the heater generates heat, and the bottom of the next packing bag is heat-sealed to prepare for the subsequent packing operation; (3) Cutting operation: The cutting module 4 of the cutting unit cooperates with the pad module during the downward process to cut the current packing bag, cut out a dotted line, and form a dotted line incision. This operation enables the packing bag to be easily opened later.

[0037] (4) Opening operation: After the cutting unit completes the point-break line cutting, the tearing module 5 opens one side of the packaging bag based on the point-break line opening to form an opening. This opening provides convenient conditions for the subsequent machine to automatically load the goods into the packaging bag.

[0038] The cutting unit is located between the heat-sealing unit and the tear-off unit. These two units can be used to compress the tubular film, keeping it taut, before the cutting module 4 cuts the film. Therefore, the cutting unit 4 can be set to lag behind the compression of the heat-sealing unit and the tear-off unit. Furthermore, since the tear-off operation must be performed after the cutting operation is completed, the tear-off operation can be delayed after the tear-off unit compresses the tubular film, specifically after the cutting is completed.

[0039] In summary, the packaging bag preforming device provided in this embodiment has at least the following beneficial effects: (1) Equipment integration, reducing costs and space occupation: The traditional tube film preforming and tearing bag technology requires the installation of three devices to complete the three steps of hot-melt sealing the bag bottom, cutting the line to form the bag opening, and tearing the line to open the bag opening. Each device has an independent drive system, control system and transmission mechanism, which makes the equipment complex and costly. The packaging bag preforming device of the present application uses a lifting drive unit 2 to synchronously drive the three working units to operate, which greatly simplifies the overall structure of the device and reduces the number of drive components, control components and transmission components, thereby significantly reducing the equipment procurement cost. For example, there is no need to equip each process with a separate motor 21, reducer and other drive equipment, nor is there a need to design a complex multi-device collaborative control system, saving a lot of hardware costs. Due to the integration of equipment, the overall size and occupied space are significantly reduced. In limited space environments such as logistics warehouses, it can save valuable storage space and improve space utilization, which is conducive to logistics companies to achieve efficient and intensive production models.

[0040] (2) Simplified operation and improved efficiency: In traditional technology, the three devices are operated independently, requiring operators to master the use of different devices respectively. The coordinated operation between the devices requires complex debugging and docking, which makes the operation difficult and inefficient. The present device uses the lifting drive unit 2 to drive multiple modules to rise and fall synchronously, achieving the simultaneous completion of heat sealing, cutting and tearing, thus simplifying the operation process.

[0041] (3) Good synergy and quality assurance: In this device, the heat sealing unit, the cutting unit, and the tearing unit are arranged in sequence and work synchronously, and the synergy between the units is good. While the heat sealing unit is preparing for the next bag, the cutting unit and the tearing unit operate on the current bag in turn, ensuring the accuracy and stability of each process.

[0042] (4) Easy maintenance and management: The integrated device structure makes equipment maintenance and management more convenient. Due to the reduction in the number of devices, maintenance personnel do not need to inspect and maintain multiple devices separately. They only need to focus on the overall operation of the device and the status of each module. When a device fails, the scope of troubleshooting is relatively small, and the fault point can be located and repaired more quickly, which reduces equipment downtime, improves equipment availability and reliability, and reduces the operating costs of logistics companies.

[0043] In one embodiment, referring to Figure 12 The tearing module 5 includes a friction roller 51. When the friction roller 51 cooperates with the bottom module 7 to press the packing bag, the rotating friction roller 51 can tear the bag open through friction.

[0044] Among them, the friction roller 51, as the core executive component of the tearing module 5, has the characteristic of being rotatable. The design of its surface material is crucial for generating sufficient friction to tear open the packing bag. The surface is preferably made of a material with a certain degree of roughness to increase the friction coefficient between the packing bag and ensure that the packing bag can be effectively driven during rotation.

[0045] The bottom module 7 is arranged on the base 12 to provide stable support and matching surface for the friction roller 51. When the friction roller 51 moves downward and presses the packing bag with the bottom module 7, the bottom module 7 plays the role of fixing the other side of the packing bag, so that the friction force generated by the rotation of the friction roller 51 can be concentrated on a specific part of the packing bag, thereby realizing accurate tearing operation along the point-break line incision on the bag body.

[0046] During the specific operation, the lifting drive unit 2 drives the tearing module 5 downward, causing the friction roller 51 to gradually approach and eventually cooperate with the bottom module 7 to compress the bag. At this point, the bag is stably clamped between the friction roller 51 and the bottom module 7, ready for the subsequent tearing operation. The friction roller 51 then begins to rotate. Due to the friction between its surface and the bag, the rotating friction roller 51 causes one side of the bag to move with it, while the other side of the bag is fixed by the bottom module 7. Under the action of friction, the bag is gradually torn open at the dotted line incision, forming a tearing opening that is convenient for loading.

[0047] In this embodiment, when the friction roller 51 cooperates with the bottom module 7 to press the packing bag, the force can be accurately concentrated on the dotted line incision. The friction force generated by the rotating friction roller 51 is uniform and stable, so that the packing bag is evenly torn open at the dotted line opening, avoiding problems such as skewed opening and incomplete tearing due to uneven force, ensuring the accuracy and consistency of the opening, and providing convenient conditions for subsequent automatic loading of the machine.

[0048] The structural design utilizes a friction roller 51 as the core component of the tearing module 5. This relatively simple structure reduces the number of components compared to some complex mechanical tearing mechanisms, thus reducing the complexity and failure rate of the device. Furthermore, the simple structure simplifies the manufacturing and assembly of the device, thereby improving production efficiency and reducing costs. This simple structure also makes maintenance and replacement of the friction roller 51 and its associated components relatively easy. If, during long-term use, the friction roller 51 wears or develops other faults, maintenance personnel can quickly disassemble and replace it, eliminating the need for complex commissioning and repair work, thus reducing maintenance time and costs.

[0049] In one embodiment, referring to Figure 12-17 The tearing module 5 includes a first base 52 and a second base 53. The first base 52 is connected to the lifting drive unit 2, and the second base 53 can be lifted and installed on the first base 52. Among them, the first seat body 52 is equipped with a push-turn block 54; the friction roller 51 can be rotatably installed on the second seat body 53, and the friction roller 51 is equipped with a shift block 511 and a return spring 512. When the friction roller 51 descends to cooperate with the bottom module 7 to press the packing bag, the first seat body 52 that continues to descend drives the push-turn block 54 to descend, and the push-turn block 54 pushes the friction roller 51 to rotate through the shift block 511 to realize tearing the opening; when the push-turn block 54 ascends relative to the shift block 511, the return spring 512 drives the shift block 511 to rotate and reset.

[0050] The first base 52 serves as a bridge connecting the entire module to the external lift drive unit 2, playing a key role in transmitting the lift drive force. The second base 53 is mounted on the first base 52 in a scalable manner, providing a stable mounting base for the friction roller 51 and enabling relative movement between the push-and-turn block 54 and the friction roller 51, thereby enabling the push-and-turn block 54 to rotate the friction roller 51.

[0051] The working principle of the tearing module 5 of this embodiment is based on the principles of mechanical transmission and elastic reset. Through the coordinated action of the lifting drive unit 2, the first base 52, the push-rotating block 54, the friction roller 51, the shifting block 511 and the reset spring 512, the bag opening function is achieved. The specific working process is as follows: (1) Descending and compacting stage: The lifting drive unit 2 is started, driving the first base body 52 to move downward. Since the second base body 53 is installed on the first base body 52 in a liftable manner, and the friction roller 51 is installed on the second base body 53, when the friction roller 51 has not yet released the packaging bag, the entire module follows and moves downward.

[0052] (2) Opening stage: When the friction roller 51 descends to cooperate with the bottom module 7 and presses the bag, the bag is fixed between the friction roller 51 and the bottom module 7, preparing for the subsequent opening operation. At this time, the second seat 53 (friction roller 51) temporarily stops descending due to the resistance of the bag and the bottom module 7. Then, as the first seat 52 continues to descend, the push-turn block 54 on the first seat 52 contacts the shift block 511 on the friction roller 51 and generates an interaction force. The push-turn block 54 pushes the friction roller 51 to rotate through the shift block 511. The friction force on the surface of the friction roller 51 acts on the bag, causing the bag to be torn open under the action of the friction force, thereby achieving the opening function.

[0053] (3) Reset phase: After the opening operation is completed, the lifting drive unit 2 drives the first base 52 upward, and the push-rotating block 54 moves upward with the first base 52, generating an upward movement relative to the shifting block 511. At this time, the shifting block 511 is no longer pushed by the push-rotating block 54, and the return spring 512, under the elastic force, rotates the shifting block 511 in the opposite direction, restoring the shifting block 511 to its initial position; then, the first base 52 drives the entire second base 53 (including the friction roller 51) upward, preparing for the next opening operation.

[0054] This embodiment, through a clever design, utilizes the driving force of the lifting drive unit 2 to indirectly drive the rotation of the friction roller 51. This eliminates the need for a separate drive source for the friction roller 51. This design reduces the number of components and simplifies the overall structure, making the module more compact and lightweight, and facilitating installation and maintenance. Furthermore, the simple structure reduces the probability of failure and improves device reliability. Furthermore, since no separate drive device, such as a drive motor 21, is required for the friction roller 51, the manufacturing cost of the device is significantly reduced. The simple structure also reduces the processing and assembly costs of components, as well as subsequent maintenance and replacement costs. This has significant economic benefits for large-scale production and application.

[0055] On the other hand, the movement of the entire tearing module 5 is closely coordinated with the movement of the lifting drive unit 2, and the rotation and reset of the friction roller 51 are achieved through mechanical transmission. This design makes the movement of the various components more coordinated and unified, avoiding the problem of asynchronous movement that may occur due to the independent control of multiple drive sources. During the packaging process, it can ensure the accuracy and stability of the tearing operation, improving the packaging quality and efficiency. The design of the reset spring 512 realizes the automatic reset function of the friction roller 51. After a tearing operation is completed, the friction roller 51 can automatically return to its initial position under the action of the reset spring 512, without the need for manual intervention, providing convenience for continuous packaging operations. This automated design improves production efficiency and reduces the workload and labor intensity of manual operations.

[0056] In one embodiment, the shift block 511 is connected to the friction roller 51 via a one-way ratchet, so that the shift block 511 can drive the friction roller 51 to rotate via the one-way ratchet, and the shift block 511 can rotate and reset independently relative to the friction roller 51.

[0057] Specifically, the shift block 511 can only drive the friction roller 51 to rotate in one direction. The advantage of this is that when the push-turn block 54 pushes the shift block 511 to rotate downward, the friction roller 51 can be driven to rotate, and the rotation direction can just use the friction force to tear the packaging bag open; when the push-turn block 54 moves upward, the return spring 512 will drive the shift block 511 to reverse and reset, and the friction roller 51 will not be driven to reverse during the reversal of the shift block 511, that is, the friction roller 51 remains stationary during the process, which can avoid the problem that the reversed friction roller 51 applies reverse friction to the packaging bag and accidentally deforms or tears the packaging bag.

[0058] In one embodiment, one end of the return spring 512 is connected to the shifting block 511 , and the other end is connected to the second seat 53 , so as to drive the friction roller 51 to rotate through the shifting block 511 .

[0059] After the friction roller 51 descends to engage the bottom module 7 and compress the bag, the first base 52 continues to descend, and the push-rotating block 54, via the shifting block 511, pushes the friction roller 51 to rotate, achieving the opening operation. During this process, the return spring 512 is stretched or compressed (depending on its initial installation state), storing elastic potential energy. During the upward phase (reset), the first base 52 drives the push-rotating block 54 upward, separating it from the shifting block 511 and no longer applying force to the shifting block 511. At this point, the return spring 512 releases its stored elastic potential energy, driving the shifting block 511 to rotate in the opposite direction, returning it to its initial position and preparing for the next opening operation.

[0060] In this embodiment, the second base 53 provides mounting support for the friction roller 51 and is a fixed structural portion within the module relative to the friction roller 51. The shift block 511 is fixed to the friction roller 51 and rotates with it, and the return spring 512 connects the two. This cleverly utilizes the existing components and space within the module, eliminating the need for additional complex transmission or support structures, making the overall structure compact and saving space. It is particularly suitable for packaging scenarios that require a certain device size. This connection method is relatively simple during the manufacturing and assembly process. It only requires reliably fixing the two ends of the return spring 512 to the shift block 511 and the second base 53, respectively, reducing the difficulty and cost of assembly. At the same time, the simple connection structure reduces the potential for loosening, falling off, and other problems that may occur due to too many connecting components, thereby improving the reliability of the structure.

[0061] In one embodiment, referring to Figure 16 The second seat body 53 is equipped with a limit block 514 that cooperates with the shift block 511. The limit block 514 is used to limit the reset position of the shift block 511, so that the shift block 511 is in a position that can be triggered by the push-turn block 54 after being reset.

[0062] During the reset process, after completing one opening operation, the lifting drive unit 2 drives the first base 52 and the push-rotating block 54 upward, and the push-rotating block 54 separates from the shifting block 511. The shifting block 511 is no longer pushed by the push-rotating block 54. At this time, the reset spring 512 releases its elastic potential energy, driving the shifting block 511 to rotate in the opposite direction, causing the shifting block 511 to begin to reset. During the reset process of the shifting block 511, the shifting block 511 gradually approaches the limit block 514 installed on the second base 53. When the shifting block 511 moves to a specific position, the blocking surface of the limit block 514 contacts the shifting block 511, preventing the shifting block 511 from moving further, thereby confining the shifting block 511 to this position. This position is carefully designed to ensure that after the shifting block 511 is reset, it is in a position where it can be triggered by the push-rotating block 54 during the next downward movement. When the lifting drive unit 2 drives the first seat body 52 and the push-turn block 54 downward for the next time, the push-turn block 54 can accurately contact the reset shift block 511, and push the shift block 511 and the friction roller 51 to rotate again, realizing a new round of tearing action, and this cycle is repeated to form a continuous and stable mechanical motion cycle.

[0063] Based on this embodiment, the limit block 514 can accurately limit the reset position of the shift block 511, ensuring that the shift block 511 is in the same position after each reset. This enables the push-turn block 54 to accurately trigger the shift block 511 the next time it goes down, avoiding operation errors or jamming caused by inaccurate reset position of the shift block 511, and improving the working accuracy and reliability of the entire tearing module 5.

[0064] In one embodiment, referring to Figure 13-15, and also includes a pressure transmission component 56, which includes a pressure transmission spring. The pressure transmission spring connects the first seat body 52 and the second seat body 53; after the friction roller 51 contacts the packaging bag, the downward pressure of the first seat body 52 is further transmitted to the second seat body 53 through the pressure transmission spring, so that the friction roller 51 further presses the packaging bag.

[0065] Specifically, the friction roller 51 is mounted on the second base 53 and always moves up and down with the second base 53. After the friction roller 51 descends and contacts the packing bag (the bottom of which is supported by the bottom module 7), the friction roller 51 stops descending. Since the second base 53 is mounted on the first base 52 in a liftable manner, the first base 52 will only continue to descend relative to the second base 53. The pressure applied by the friction roller 51 to the packing bag is only provided by the second base 53 and the gravity of the friction roller 51. Under normal circumstances, this pressure is not enough to press the packing bag firmly enough. As a result, when the cutting module 4 presses down to cut the packing bag, the packing bag will not be accurately cut due to its slackness. At the same time, the rotation of the friction roller 51 cannot exert enough friction to tear the bag open.

[0066] To this end, in this embodiment, a pressure transmission assembly 56 with a pressure transmission spring is specially provided, and the pressure transmission spring connects the first seat body 52 (which can be directly connected or indirectly connected) and the second seat body 53 (which can also be directly connected or indirectly connected), so that when the friction roller 51 contacts the packaging bag and stops descending, the first seat body 52 that continues to descend can continue to apply downward pressure to the second seat body 53 through the pressure transmission spring, and the second seat body 53 transmits the downward pressure to the friction roller 51, thereby gradually increasing the pressure applied by the friction roller 51 on the packaging bag, so as to enhance the degree of compression of the packaging bag and increase the friction between the friction roller 51 and the packaging bag.

[0067] In one embodiment, referring to Figure 14 and Figure 15The pressure transmission assembly 56 further includes a limit bar 561, a limit rod 562, a limit nut 563 and a limit seat 564. The pressure transmission spring includes a first transmission spring 565 and a second transmission spring 566. The limit bar 561 is horizontally arranged between the first seat body 52 and the second seat body 53. The limit rod 562 is fixedly connected to the limit bar 561 and extends upward through the crossbeam plate 111 of the mounting frame 11 and then connected to the limit nut 563. The limit bar 5 61 and the limit rod 562 can move up and down relative to the cross beam plate 111, and the limit nut 563 can contact the top surface of the cross beam plate 111 to limit the downward limit position of the limit bar 561; the limit seat 564 is fixed to the second seat body 53; the upper end of the first transfer spring 565 abuts the first seat body 52, and the lower end abuts the limit bar 561, the upper end of the second transfer spring 566 abuts the limit bar 561, and the lower end abuts the limit seat 564.

[0068] In this embodiment, the limit isolation of the limit bar 561 can adjust the pressure transmitted by the pressure transmission spring to the second seat body 53, thereby preventing the friction roller 51 from exerting too much pressure on the packaging bag and causing excessive friction, which in turn can cause the packaging bag to be torn open excessively and damage the packaging bag.

[0069] Specifically, when the friction roller 51 moves downward and contacts the packing bag, the limiting nut 563 has not yet contacted the cross beam 111, and the limiting bar 561 still has room to continue to move downward. The first seat body 52 that continues to move downward transmits the downward force to the limiting bar 561 through the first transfer spring 565 and pushes the limiting bar 561 to move downward. The limiting bar 561 that continues to move downward continues to transmit the downward force to the second seat body 53 through the second transfer spring 566. In this process, the pressure of the friction roller 51 on the packing bag gradually increases. When the pressure transmission component 56 moves downward until the limiting nut 563 contacts the cross beam 111, the limiting rod 562 and the limiting bar 561 move downward. The downward freedom is restricted, the limit bar 561 stops descending, the limit bar 561 and the limit seat 564 (the second seat body 53) remain relatively stationary, and the compression amount of the second transfer spring 566 remains unchanged, so the pressure applied by the friction roller 51 to the packaging bag remains unchanged (the pressure value can be adjusted by adjusting the installation height of the limit nut 563). Moreover, at this time, the first seat body 52 can continue to descend relative to the second seat body 53, the first transfer spring 565 continues to be compressed, and the first seat body 52 that continues to descend can continue to drive the push-turn block 54 downward, so that the push-turn block 54 can continue to push the shift block 511 to drive the friction roller 51 to rotate.

[0070] As can be seen from the above, the pressure transmission component 56 of this embodiment can also adjust and control the pressure applied by the friction roller 51 to the packaging bag to meet the optimal working conditions. Moreover, when the regulated pressure limit value is reached, the push-turn block 54 can continue to move downward. This ensures that in the process of the push-turn block 54 driving the friction roller 51 to rotate and tear the opening, the friction force between the friction roller 51 and the packaging bag remains unchanged, avoiding the problem of uncertainty caused by the continuous change of friction force during the tearing process, affecting the quality of the tearing opening or even damaging the packaging bag.

[0071] In one embodiment, combining Figure 12-15 The first base body 52 includes a top fixing plate 522 and a first vertical plate 521. The top fixing plate 522 is connected to the lifting drive unit 2. The first vertical plate 521 is connected to the top fixing plate 522 and extends vertically downward. The second base body 53 includes a second vertical plate 531 and two clamping plates 532 connected to both ends of the second vertical plate 531. The clamping plates 532 extend downward relative to the second vertical plate 531, and each of the clamping plates 532 is installed with a bearing 513. The two ends of the friction roller 51 are respectively connected to the two bearings 513. A guide shaft 551 is installed on the side of the first vertical plate 521 close to the second vertical plate 531, and a slide 552 is installed on the side of the second vertical plate 531 close to the first vertical plate 521. The slide 552 can be slidably connected to the guide shaft 551 to guide the lifting movement of the second base body 53 relative to the first base body 52.

[0072] In the specific structure, the first vertical plate 521 is perpendicularly connected to the top fixing plate 522 and extends downward, providing the primary structural support for the entire first base 52. It not only connects to the top fixing plate 522 but also houses a guide shaft 551, a crucial component for guiding the movement of the second base 53. Its verticality and dimensional accuracy significantly impact the stability of the system. The second vertical plate 531 forms the main frame of the second base 53, connecting the two clamping plates 532 and providing a mounting base for the friction roller 51 and its bearing 513. The guide shaft 551 is mounted on the side of the first vertical plate 521 near the second vertical plate 531, providing a guide track for the lifting and lowering motion of the second base 53. Its surface requires high smoothness and straightness to reduce friction and wear when the slide 552 slides. The slide 552 is installed on the side of the second vertical plate 531 close to the first vertical plate 521 and is slidably connected to the guide shaft 551. The design of the slide 552 must ensure good cooperation with the guide shaft 551, enabling stable and smooth sliding, and at the same time having a certain wear resistance.

[0073] The cooperation between the guide shaft 551 and the slide seat 552 provides precise guidance for the lifting movement of the second seat body 53, greatly improving the accuracy and stability of the movement.

[0074] In this embodiment, guide shaft 551 and slide 552 are installed between two vertical plates, fully utilizing the space between the vertical plates and avoiding the need for additional guide structures on the outside of the device. This design effectively controls the width of the entire structure and reduces unnecessary space occupation. For example, in production environments with high space requirements, this compact structural design can make equipment easier to install and arrange, improving space utilization.

[0075] In one embodiment, the bottom module 7 is a flexible strip fixed on the base 12 .

[0076] The slats are made of a flexible material, which imparts a degree of elasticity and deformability. Compared to rigid materials, flexible materials are more adaptable to varying external forces and contact conditions. They can deform to a certain degree when subjected to pressure or friction without easily breaking. Because of their elasticity, the flexible slats can accommodate a variety of packaging materials, such as plastic film and paper packaging. For thinner plastic films, the flexible slats can deform slightly to increase friction and prevent slippage. For thicker paper packaging, they also provide sufficient support and friction for effective opening. The bottom pad module 7 can be made of rubber, plastic, or other materials.

[0077] In another embodiment, the bottom module 7 is a roller structure with both ends rotatably mounted on the base 12 .

[0078] In one embodiment, a second installation slot 123 is provided on the base 12 , and the bottom module 7 is embedded in the second installation slot 123 .

[0079] During operation, the tearing module 5 will be affected by various external forces, such as the rotational force of the friction roller 51, the pulling force of the packing bag, etc. The embedded bottom module 7 is tightly combined with the base 12 and can better resist the interference of these external forces and maintain its own position stable.

[0080] In one embodiment, referring to Figure 11 The cutting module 4 includes a serrated blade 41 and a blade seat 42. The blade seat 42 is connected to the lifting drive unit 2, so that the lifting drive unit 2 can drive the serrated blade 41 to move up and down through the blade seat 42; the pad module is integrally formed on the base 12, and the pad module is provided with a knife avoidance groove 122 corresponding to the serrated blade 41, and the knife avoidance groove 122 is located between the second clamping module and the bottom pad module 7.

[0081] The unique serrated structure of the serrated blade 41 is the key to its ability to quickly form a dotted line cut. When the serrated blade 41 is driven downward by the lifting drive unit 2 to cut the bag, each serration cuts into the bag material in turn. Due to the shape and arrangement of the serrations, the blade does not completely sever the bag at once, but instead forms a series of small, spaced cuts in the material. The material between these small cuts remains connected, thus forming a dotted line cut. The blade holder 42 serves as the mounting carrier for the serrated blade 41, securing and supporting the blade. It is connected to the lifting drive unit 2 and can accurately transmit the power of the lifting drive unit 2 to the serrated blade 41, ensuring that the blade can move up and down according to the predetermined trajectory.

[0082] The pad module and the base 12 are integrally formed to enhance the stability and strength of the entire structure. This design avoids the loosening or displacement problems caused by the loose connection between the pad module and the base 12, and ensures that the pad module can always provide stable support for the packaging bag during the cutting process. The knife avoidance groove 122 is provided to provide sufficient movement space for the blade when the serrated blade 41 descends for cutting, to avoid the blade colliding with the pad module and damaging the blade or pad. The knife avoidance groove 122 is located between the second pressing module and the bottom pad module 7. This layout enables the cutting operation to be carried out when the packaging bag is effectively compressed, thereby improving the accuracy and quality of the cutting.

[0083] When the packaging bag needs to be cut, the lifting drive unit 2 starts working, driving the serrated blade 41 upward or downward to the initial preparation position through the knife holder 42. At this time, the positions on both sides of the knife avoidance groove 122 on the packaging bag are respectively pressed and fixed (pressed by the heat sealing unit and the tearing unit respectively), and the knife avoidance groove 122 on the pad module is exactly aligned with the cutting path of the serrated blade 41. The lifting drive unit 2 continues to drive the knife holder 42 and the serrated blade 41 to move downward, and the serrated blade 41 gradually cuts into the packaging bag. Since the two sides of the packaging bag are firmly pressed, the serrated blade 41 can smoothly complete the cutting action and cut the packaging bag. After the cutting is completed, the lifting drive unit 2 drives the serrated blade 41 to return to the initial position and wait for the next cutting operation.

[0084] In this embodiment, when cutting the bag, the compression effect of the heat-sealing unit and the tearing unit on both sides is utilized to keep the bag flat and fixed during the cutting process, reducing the cutting deviation caused by the shaking or deformation of the bag, thereby improving the cutting accuracy and consistency. The design of the knife avoidance groove 122 effectively protects the serrated blade 41 and the pad module. During the cutting process, the blade can smoothly enter the knife avoidance groove 122, avoiding direct contact with the pad module, reducing blade wear and damage, and extending the service life of the blade. At the same time, it also prevents the pad module from being scratched or damaged by the blade, ensuring the flatness and stability of the pad module.

[0085] In one embodiment, referring to Figure 7 The cutting module 4 also includes a second guide component 43 and a second buffer spring 44. The knife seat 42 is connected to the lifting drive unit 2 through the second guide component 43. The second guide component 43 guides the linear lifting and lowering of the knife seat 42; the second buffer spring 44 is arranged between the knife seat 42 and the lifting drive unit 2. When the serrated blade 41 descends and an accidental collision occurs, the second buffer spring 44 can be compressed to absorb energy.

[0086] The second guide assembly 43 typically consists of a guide post and a sliding sleeve. The sliding sleeve is fixed to the lift drive unit 2, and the guide post is mounted on the tool holder 42. It cooperates with the sliding sleeve and can slide freely up and down along the sliding sleeve. When the lift drive unit 2 drives the tool holder 42 up and down, the guide post moves linearly along the sliding sleeve. Due to the guiding effect of the sliding sleeve, the tool holder 42 can only move along the linear direction specified by the sliding sleeve, thus ensuring the accuracy of the linear movement of the tool holder 42.

[0087] The second buffer spring 44 is generally a coil spring with a certain elastic coefficient and stroke. One end of the spring is mounted on the knife holder 42, and the other end is mounted on the corresponding part of the lifting drive unit 2. Under normal circumstances, the second buffer spring 44 is in a natural state or a slightly pre-compressed state, which does not affect the normal lifting movement of the knife holder 42. When the serrated blade 41 is accidentally impacted during its descent, the impact force is transmitted to the second buffer spring 44 through the knife holder 42. At this time, the second buffer spring 44 will be further compressed, converting the impact energy into elastic potential energy of the spring, thereby reducing the impact of the impact force on the equipment. When the impact force disappears, the spring will return to its original state, ready for the next cutting.

[0088] In one embodiment, referring to Figure 9-10 The first clamping module 3 includes a flexible pressure strip 32 and a pressure strip seat 31. The pressure strip seat 31 is connected to the lifting drive unit 2, so that the lifting drive unit 2 can drive the flexible pressure strip 32 to move up and down through the pressure strip seat 31; the second clamping module is integrally formed on the base 12, and the second clamping module is provided with a first installation groove 121, and the heater is installed in the first installation groove 121.

[0089] During the bag cutting and heat-sealing process, the primary function of the first compression module 3 is to stabilize and compress the bag prior to cutting and heat-sealing. The flexible contact of the flexible pressure strips 32 ensures sufficient pressure on the bag to secure it while preventing damage from excessive pressure, thus ensuring precise cutting and effective heat-sealing. The flexible pressure strips 32 are made of a flexible material, such as rubber or silicone. These materials exhibit excellent flexibility and elasticity, allowing them to deform during compression, thereby conforming to the bag's surface and accommodating bags of varying shapes and thicknesses, ensuring uniform compression.

[0090] The second clamping module is integrally formed on the base 12. Its main purpose is to provide a stable installation position for the heater and cooperate with the first clamping module 3 during the heat sealing process to apply uniform pressure to the part of the packaging bag to be heat-sealed, so that the heat generated by the heater can be effectively transferred to the packaging bag, thereby achieving reliable heat sealing. The integrated design makes the second clamping module and the base 12 become a whole, which enhances the stability and reliability of the structure, reduces the problems such as looseness and displacement that may occur due to the connection of components, and ensures the position accuracy of the second clamping module during long-term use. A first mounting groove 121 is provided on the second clamping module to provide a special installation space for the heater. The size and shape of the mounting groove match the heater, which can ensure that the heater is firmly installed and maintains a stable position during the heat sealing process, which is conducive to the uniform transfer of heat.

[0091] When it is necessary to cut and heat-seal the packing bag, the lifting drive unit 2 is started, and the flexible pressure strip 32 is driven downward by the pressure strip seat 31. The flexible pressure strip 32 gradually approaches the packing bag and contacts the surface of the packing bag. As it continues to descend, the flexible pressure strip 32 is deformed, exerting a certain pressure on the packing bag, and pressing the packing bag against the work platform. During the cutting and heat-sealing process, the flexible pressure strip 32 always remains in a compressed state to prevent the packing bag from moving or deforming. The heater is installed in the first mounting slot 121 of the second pressing module and is connected to a power source. When heat sealing is required, the heater is powered on and generates heat, transferring heat to the part of the packing bag in contact with it. At the same time, the first pressing module 3 and the second pressing module cooperate with each other to apply pressure to the part of the packing bag to be heat-sealed, so that the upper and lower layers of the packing bag melt and combine under the action of heat and pressure to achieve heat sealing.

[0092] In another embodiment, the first clamping module 3 includes a heater seat and the heater, the heater seat is connected to the lifting drive unit 2, and the heater is installed on the heater seat; the second clamping module is integrally formed on the base 12, and the second clamping module is provided with a first installation groove 121, and a flexible pad is installed in the first installation groove 121.

[0093] In this embodiment, the heater is arranged on the first pressing module 3 which follows the lifting and lowering movement of the lifting drive unit 2, and the second pressing module is correspondingly arranged as a flexible pad structure. The cooperation of the two can also achieve stable heat sealing work.

[0094] In one embodiment, referring to Figure 7 The first clamping module 3 also includes a first guide assembly 33 and a first buffer spring 34. The pressure bar seat 31 is connected to the lifting drive unit 2 through the first guide assembly 33. The first guide assembly 33 guides the linear lifting of the pressure bar seat 31; the first buffer spring 34 is arranged between the pressure bar seat 31 and the lifting drive unit 2. The first buffer spring 34 can be compressed to absorb energy to avoid damage to the heater below caused by rigid impact.

[0095] In the first pressing module 3, the pressure strip seat 31 needs to perform precise linear lifting and lowering motion with the lifting drive unit 2 to ensure that the flexible pressure strip 32 can be accurately pressed on the specified position of the packaging bag. The design of the first guide component 33 is to provide precise guidance for the linear lifting of the pressure strip seat 31 to prevent the pressure strip seat 31 from offsetting, shaking or tilting during the lifting process, thereby improving the accuracy and stability of the pressing and ensuring the quality of the heat sealing process.

[0096] Under normal circumstances, the first buffer spring 34 is in a natural state or a slightly pre-compressed state, and does not affect the normal lifting and lowering movement of the beading seat 31. When the beading seat 31 descends to press the packaging bag, if an abnormal situation occurs and the beading seat 31 is about to have a rigid impact with the underlying components, the beading seat 31 will continue to move downward, compressing the first buffer spring 34. At this time, the first buffer spring 34 converts the impact energy into elastic potential energy, reducing the impact force on the heater and other components. When the impact force disappears, the spring will return to its original state, allowing the beading seat 31 to return to its normal working position.

[0097] In one embodiment, a punching unit 6 is further included which is installed on one side of the pressure strip seat 31. The punching unit 6 can rise and fall synchronously with the pressure strip seat 31. When it falls, it can punch an exhaust hole on the packaging bag to facilitate the discharge of internal air from the subsequently formed packaging bag.

[0098] During the shaping and subsequent use of packaging bags, exhausting internal air is a crucial step. If the air inside the packaging bag cannot be effectively exhausted, it may occupy a large space when stacked, increasing storage costs. During transportation, air sloshing may cause the packaging bag to be unstable or even damaged. When filling materials, the presence of air can also affect the filling density and accuracy. Therefore, the design of a punching unit 6 installed on the side of the pressure bar seat 31 and capable of synchronously rising and falling to create exhaust holes in the packaging bag can effectively solve these problems and improve the performance and convenience of the packaging bag.

[0099] When punching a bag, the lift drive unit 2 lowers the hold-down bar seat 31. Simultaneously, because the punch unit 6 is attached to the side of the hold-down bar seat 31 via a connecting structure, it also descends synchronously with the hold-down bar seat 31. When the punching needle of the punch unit 6 contacts the bag, its sharp tip penetrates the bag material, forming a vent hole in the bag. The punch unit 6 rises and falls synchronously with the hold-down bar seat 31, eliminating the need for additional positioning and adjustment steps. This ensures that the punching position precisely matches the position of the pressing, cutting, or heat-sealing process, improving the overall accuracy and consistency of the bag processing.

[0100] In one embodiment, the lifting drive unit 2 includes a motor 21, a ball screw 22 and a lifting plate 23. The motor 21 is fixedly mounted on the frame 1 and connected to the screw of the ball screw 22. The lifting plate 23 is connected to the nut of the ball screw 22. The first clamping module 3, the cutting module 4 and the tearing module 5 are respectively connected to the lifting plate 23.

[0101] The motor 21 is used as a power source, and the ball screw 22 converts the motor's rotational motion into linear motion, thereby driving the lifting plate 23 to move vertically. Since the first compression module 3, the cutting module 4, and the tearing module 5 are all connected to the lifting plate 23, they can rise and fall synchronously with the lifting plate 23, completing a series of operations such as compression, cutting, and tearing of the packaging bag.

[0102] The motor 21 is the power source of the entire lifting drive unit 2. It can output stable rotational torque to power the movement of the ball screw 22. A servo motor 21 or a stepper motor 21 is typically used. These two types of motors 21 offer advantages such as high control precision, fast response speed, and smooth operation, meeting the packaging equipment's requirements for precise control of lifting movements. The ball screw 22 consists of a screw and a nut, with balls mounted between the nut and the screw. The rolling of the balls achieves relative motion between the screw and the nut. Compared to traditional sliding screws, the ball screw 22 offers advantages such as high transmission efficiency, low friction, and minimal wear, significantly improving the energy efficiency and service life of the lifting drive unit 2. The ball screw 22 is manufactured with high precision, enabling precise linear motion transmission and ensuring the precise positioning of the lifting plate 23, thereby ensuring that the first compression module 3, the cutting module 4, and the tearing module 5 can accurately act on the designated locations of the packaging bag. The lifting plate 23 is a key component that connects the nut of the ball screw 22 and each functional module. It must possess sufficient strength and rigidity to withstand the weight of each module, as well as the inertial and impact forces generated during the lifting process, ensuring the stability of the entire structure. Because each functional module is connected to the same lifting plate 23, the synchronous lifting of the lifting plate 23 enables the coordinated operation of multiple modules, avoiding the asynchronous operation that may occur when each module is driven independently, and improving the operational stability and reliability of the equipment.

[0103] During operation, when it is necessary to drive the lifting plate 23 to descend, the control system sends a command to the motor 21, and the motor 21 starts to rotate. The rotation of the motor 21 drives the screw of the ball screw 22 connected to it to rotate. Since the nut is fixedly connected to the lifting plate 23 and the nut is restricted by the lifting plate 23 and cannot rotate, the nut will move linearly downward along the screw. As the nut descends, the lifting plate 23 also descends, thereby driving the first pressing module 3, cutting module 4, and tearing module 5 fixed on the lifting plate 23 to descend together. When reaching the predetermined position, each module completes the operations of pressing, cutting, and tearing the packaging bag respectively. After completing the operation, the control system controls the motor 21 to rotate in the opposite direction, and through the transmission of the ball screw 22, the lifting plate 23 drives each module to rise and reset, preparing for the next operation.

[0104] In one embodiment, Figures 1-4 The mounting frame 11 includes two upright vertical support plates 112 and a horizontal crossbeam plate 111. The bottom ends of the two vertical support plates 112 are fixedly connected to the base 12, and the top ends are connected to the crossbeam plates 111 to form a stable frame. The motor 21 is fixedly installed on the crossbeam plates 111, and each unit is installed in the space surrounded by the frame, so that the lifting drive unit 2 can stably drive each unit module to lift and lower in a coordinated manner.

[0105] The frame structure, consisting of two vertical support plates 112 and a crossbeam plate 111, has high strength and rigidity, and can withstand large external forces, ensuring the stability of the equipment during operation. Even when lifting at high speeds or under heavy loads, the mounting frame 11 will not experience significant deformation or shaking, thereby ensuring the normal operation of each unit module. The stable mounting frame 11 structure provides a precise motion reference for the lifting drive unit 2 and each unit module, so that the relative position and motion relationship between each unit module can be highly consistent. This helps to improve the overall operating accuracy of the packaging equipment and ensure that operations such as compacting, cutting, and tearing the packaging bag can be carried out accurately.

[0106] In one embodiment, guide rails 1121 are respectively provided on the facing sides of the two vertical support plates 112, and the ends of the first clamping module 3, the cutting module 4 and the tearing module 5 are respectively connected to the guide rails 1121 in a sliding manner, and the guide rails 1121 are used to guide the stable lifting and lowering of each module.

[0107] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other positions or relationships are used solely for ease of description and simplified operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0108] In this specification, reference to terms such as "one embodiment" or "example" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0109] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0110] The technical principles of the present application have been described above in conjunction with specific embodiments. These descriptions are intended solely to explain the principles of the present application and are not to be construed in any way as limiting the scope of protection of the present application. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present application without inventive effort, and such implementations will fall within the scope of protection of the present application.

Claims

1. A packaging bag preforming device, characterized in that: include: A frame (1) comprising a base (12) and a mounting frame (11) mounted on the base (12); A lifting drive unit (2) is mounted on the mounting frame (11); The heat sealing unit comprises a first pressing module (3) and a second pressing module which are arranged opposite to each other, wherein the first pressing module (3) is connected to the lifting drive unit (2), the second pressing module is arranged on the base (12), and at least one of the first pressing module (3) and the second pressing module is provided with a heater; A cutting unit comprising a cutting module (4) and a backing plate module arranged opposite to each other, wherein the cutting module (4) is connected to the lifting drive unit (2), and the backing plate module is arranged on the base (12); The tearing opening unit comprises a tearing module (5) and a bottoming module (7) arranged opposite to each other, wherein the tearing module (5) is connected to the lifting drive unit (2), and the bottoming module (7) is arranged on the base (12); The lifting drive unit (2) can drive the first pressing module (3), the cutting module (4) and the tearing module (5) to rise and fall synchronously, thereby achieving the synchronous completion of heat sealing, cutting and tearing operations.

2. The packaging bag preforming device according to claim 1, characterized in that: The tearing module (5) comprises a friction roller (51). When the friction roller (51) cooperates with the bottom module (7) to press the packing bag, the rotating friction roller (51) can tear the bag open through friction.

3. The packaging bag preforming device according to claim 2, characterized in that: The tear-off module (5) comprises a first base (52) and a second base (53), wherein the first base (52) is connected to the lifting drive unit (2), and the second base (53) is liftably mounted on the first base (52); The first seat (52) is provided with a push-turn block (54); the friction roller (51) is rotatably mounted on the second seat (53), and the friction roller (51) is provided with a shift block (511) and a return spring (512). When the friction roller (51) descends to cooperate with the bottom module (7) to press the packing bag, the first seat (52) that continues to descend drives the push-turn block (54) downward, and the push-turn block (54) pushes the friction roller (51) to rotate through the shift block (511) to realize the tearing opening; when the push-turn block (54) ascends relative to the shift block (511), the return spring (512) drives the shift block (511) to rotate and return to its original position.

4. The packaging bag preforming device according to claim 3, characterized in that: The shift block (511) is connected to the friction roller (51) via a one-way ratchet, so that the shift block (511) can drive the friction roller (51) to rotate via the one-way ratchet, and the shift block (511) can rotate and reset independently relative to the friction roller (51).

5. The packaging bag preforming device according to claim 3, characterized in that: One end of the return spring (512) is connected to the shift block (511), and the other end is connected to the second seat (53), so as to drive the friction roller (51) to rotate through the shift block (511).

6. The packaging bag preforming device according to claim 3, characterized in that: The second seat (53) is provided with a limit block (514) cooperating with the shift block (511), and the limit block (514) is used to limit the reset position of the shift block (511), so that the shift block (511) is in a position capable of being triggered by the push-turn block (54) after being reset.

7. The packaging bag preforming device according to claim 3, characterized in that: The first base body (52) includes a top fixing plate (522) and a first vertical plate (521), wherein the top fixing plate (522) is connected to the lifting drive unit (2), and the first vertical plate (521) is connected to the top fixing plate (522) and extends vertically downward; the second base body (53) includes a second vertical plate (531) and two clamping plates (532) connected to both ends of the second vertical plate (531), wherein the clamping plates (532) extend downward relative to the second vertical plate (531), and each of the clamping plates (532) is installed with a bearing (513), and the two ends of the friction roller (51) are respectively connected to the two bearings (513); A guide shaft (551) is installed on the side of the first vertical plate (521) close to the second vertical plate (531), and a slide seat (552) is installed on the side of the second vertical plate (531) close to the first vertical plate (521). The slide seat (552) can be slidably connected to the guide shaft (551) to guide the lifting movement of the second base body (53) relative to the first base body (52).

8. The packaging bag preforming device according to claim 1, characterized in that: The cutting module (4) includes a serrated blade (41) and a blade holder (42), and the blade holder (42) is connected to the lifting drive unit (2), so that the lifting drive unit (2) can drive the serrated blade (41) to move up and down through the blade holder (42); the pad module is integrally formed on the base (12), and the pad module is provided with a knife avoidance groove (122) corresponding to the serrated blade (41), and the knife avoidance groove (122) is located between the second pressing module and the bottom pad module (7).

9. The packaging bag preforming device according to claim 1, characterized in that: The first pressing module (3) comprises a flexible pressure strip (32) and a pressure strip seat (31), the pressure strip seat (31) being connected to the lifting drive unit (2), so that the lifting drive unit (2) can drive the flexible pressure strip (32) to move up and down through the pressure strip seat (31); the second pressing module is integrally formed on the base (12), the second pressing module is provided with a first installation groove (121), and the heater is installed in the first installation groove (121); Alternatively, the first pressing module (3) comprises a heater seat and the heater, the heater seat is connected to the lifting drive unit (2), and the heater is mounted on the heater seat; the second pressing module is integrally formed on the base (12), the second pressing module is provided with a first mounting groove (121), and a flexible pad is mounted in the first mounting groove (121).

10. The packaging bag preforming device according to claim 1, characterized in that: The lifting drive unit (2) comprises a motor (21), a ball screw (22) and a lifting plate (23); the motor (21) is fixedly mounted on the frame (1) and connected to the screw rod of the ball screw (22); the lifting plate (23) is connected to the nut of the ball screw (22); the first pressing module (3), the cutting module (4) and the tearing module (5) are respectively connected to the lifting plate (23).

Images