Vacuum bag taking machine for latex production line and its bag taking mechanism and packaging production line

Abstract

This utility model discloses a vacuum bag-grabbing machine for latex production lines, its bag-grabbing mechanism, and a packaging production line, belonging to the field of mechanical engineering technology. The bag-grabbing mechanism includes a fixed plate, a connecting plate, and a suction cup mounting plate connected by a guide assembly. At least eight vacuum suction cups are symmetrically arranged on both sides of the suction cup mounting plate, and each suction cup's pipeline is equipped with a vacuum logic valve for independent control. A placement plate is located below the suction cups, and three sides of the plate are equipped with brush damping components made of bristles of specific material, density, and friction coefficient, forming an enclosure with a baffle on one side. This utility model, through the synergistic design of independent control of multiple suction cups and brush damping, effectively solves the problems of unstable bag suction, easy suction of multiple bags, and low bag capacity in the enclosed area in existing technologies. It is particularly suitable for grasping large-diameter packaging bags from latex production lines that are prone to sticking together, significantly improving the bag-grabbing success rate and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering technology, specifically to a vacuum bag-removing machine for large-diameter packaging bags in latex production lines, its bag-removing mechanism, and a packaging production line. Background Technology

[0002] In the latex production industry, the level of automation in large-diameter packaging lines directly impacts production efficiency and costs. Currently, these production lines commonly use vacuum bag-grabbing machines for automatic bag gripping and loading. However, in practical applications, the core bag-grabbing mechanism still faces several technical bottlenecks that urgently need to be addressed. The primary problem lies in the insufficient stability of the suction effect. Due to the large size of latex packaging bags and their tendency to slightly stick or generate static electricity on their surfaces, traditional bag-grabbing mechanisms often struggle to reliably grip bags due to the limited number of suction cups and the inability to independently adjust the suction force. This easily leads to missed suction or malfunctions caused by gripping multiple bags at once. This not only results in frequent production line downtime but also requires operators to be on standby at all times to handle emergencies, placing additional pressure on production staffing and stable operation.

[0003] Secondly, the existing bag-picking mechanism's structural design also limits the capacity of the enclosed area for one-time bag loading; in order to ensure the success rate of picking up the bags, it is often necessary to reduce the number of stacked bags, thereby increasing the frequency of replenishment and indirectly reducing the overall production efficiency.

[0004] Therefore, the industry urgently needs a new bag-removing mechanism that can significantly improve the stability and reliability of bag removal and adapt to the specific working conditions of large latex bags, so as to fundamentally break through the limitations of existing technologies. Utility Model Content

[0005] This utility model mainly solves the technical problems of unstable bag suction, easy suction of multiple packaging bags at one time, and low production efficiency caused by the above problems, which result in a small number of bags being loaded into the enclosure area at one time. The specific technical solution is as follows:

[0006] This utility model provides a bag-removing mechanism for a latex line vacuum bag-removing machine, comprising:

[0007] A fixing plate installed on the telescopic rod of the cylinder of the vacuum bag removal machine;

[0008] A connecting plate vertically mounted on the fixing plate;

[0009] A suction cup mounting plate is disposed below the connecting plate, and a guide assembly is provided between the suction cup mounting plate and the connecting plate;

[0010] The guiding assembly includes a guide seat disposed on the bottom surface of the connecting plate and two guide rods that slide within the guide seat. The bottom ends of the guide rods are fixedly connected to the suction cup mounting plate via a connecting block, so that the extension and retraction of the drive cylinder between the guide rods causes the suction cup mounting plate to move up and down relative to the connecting plate under the guidance of the guiding assembly.

[0011] Several vacuum suction cups are symmetrically mounted on the suction cup mounting plate on both sides and connected to the vacuum system through pipelines. Each pipeline is equipped with a vacuum logic valve corresponding to it.

[0012] The cable chain mounting plate and the cable chain on the suction cup mounting plate are provided thereon, and the pipes and cables are laid inside the cable chain;

[0013] A placement plate is positioned below the vacuum suction cup. A baffle is provided on one side of the placement plate near the fixing plate, and brush damping assemblies are provided on the other three sides. The baffle and the three brush damping assemblies form an enclosed area for placing packaging bags.

[0014] In one embodiment, the brush damping assembly includes a brush body disposed on the placement plate, the brush body having bristles for contacting the surface of the packaging bag;

[0015] The bristles are made of nylon or conductive fiber with a density of 100 to 300 bristles per square centimeter. The length of the bristles extending out of the brush body (2) is 10 mm to 30 mm, and the dynamic friction coefficient μ with the surface of the packaging bag is 0.3 to 0.6.

[0016] In one embodiment, the number of vacuum suction cups is at least eight.

[0017] In one embodiment, the suction cup mounting plate has elongated mounting grooves symmetrically formed on both sides, and the connecting block is threaded with a fixing bolt that passes through the mounting groove. The fixing bolt can be tightly fitted with the bottom surface of the suction cup mounting plate to achieve locking.

[0018] In one embodiment, by loosening the fixing bolts and moving the position of the connecting block within the mounting groove, the horizontal position of the suction cup mounting plate relative to the connecting plate can be adjusted, with the adjustment stroke matching the length of the mounting groove.

[0019] This utility model also provides a vacuum bag removal machine, including the bag removal mechanism described above.

[0020] This utility model also provides a packaging production line, including the aforementioned vacuum bag removal machine.

[0021] This invention employs at least eight symmetrically arranged vacuum suction cups, each independently equipped with a vacuum logic valve, achieving precise and independent control of the suction force. This ensures that the mechanism provides sufficient and adjustable suction force when handling latex packaging bags of different sizes and weights, significantly improving the success rate and applicability of bag retrieval. Furthermore, by incorporating damping components composed of bristles of specific material, density, and friction coefficient on three sides of the placement plate, which, together with a side baffle, effectively enclose the suction cups, they can brush away and impede the following movement of lower-layer bags during suction cup operation. This fundamentally solves the problem of "double bags" or "multiple bags" sticking together, significantly reducing the bag retrieval failure rate. In addition, the adjustable design of the suction cup mounting plate through mounting grooves and bolts gives the mechanism excellent adaptability, allowing for quick adjustment to accommodate packaging bags of different specifications, improving the flexibility and changeover efficiency of the production line. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the bag-retrieving mechanism of this utility model;

[0023] Figure 2 This is a bottom view of the overall structure of the bag-retrieving mechanism of this utility model.

[0024] In the diagram: 1. Placement plate; 2. Brush body; 3. Packaging bag; 4. Fixing plate; 5. Cable chain; 6. Cable chain mounting plate; 7. Suction cup mounting plate; 8. Connecting plate; 9. Guide seat; 10. Guide rod; 11. Vacuum suction cup; 12. Mounting groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1:

[0027] This utility model provides a bag-retrieving mechanism for a latex vacuum bag-retrieving machine. The mechanism includes a fixed plate 4 serving as a mounting base. The fixed plate 4 is securely mounted to the end of the telescopic rod of the vacuum bag-retrieving machine's cylinder via mounting holes, allowing it to be driven by the cylinder for precise horizontal movement. On the upper surface of the fixed plate 4, a rectangular connecting plate 8 is vertically fixed with a set of high-strength bolts, providing robust support for subsequent components. Below the connecting plate 8, a suction cup mounting plate 7, primarily used for mounting a vacuum suction cup 11, is provided. A guide assembly is provided between the suction cup mounting plate 7 and the upper connecting plate 8.

[0028] Specifically, the guide assembly consists of a guide seat 9 and two smooth guide rods 10. The two guide seats 9 are located on both sides of the drive cylinder and are bolted together to form a whole. They are then bolted together and fixed to the center of the bottom surface of the connecting plate 8. The two guide rods 10 are parallel and slidably inserted into the through holes opened on the guide seat 9. The bottom ends of the guide rods 10 and the output shaft of the drive cylinder are fixed to a connecting block by welding or bolting. The connecting block is fixed to the upper surface of the suction cup mounting plate 7. The top ends of the guide rods 10 extend upward and penetrate the connecting plate 8. In this way, when the drive cylinder drives the suction cup mounting plate 7 to move as a whole, the suction cup mounting plate 7 can maintain extremely stable vertical linear movement relative to the connecting plate 8 under the precise sliding cooperation between the guide rods 10 and the guide seat 9, effectively preventing any form of swaying or jamming.

[0029] To further enhance the adaptability and ease of adjustment of the mechanism, two elongated mounting grooves 12 are symmetrically machined on the suction cup mounting plate 7 near its two side edges. Tightly tightenable fixing bolts are threaded onto the connecting blocks in the aforementioned guide assembly. The threaded portion of these fixing bolts passes downwards through the mounting grooves 12 and is locked by engaging with a nut or by directly fitting tightly against the bottom surface of the suction cup mounting plate 7. When it is necessary to adjust the overall horizontal position of all vacuum suction cups 11 according to the actual size of the packaging bag 3, the operator simply loosens these two fixing bolts, allowing the entire suction cup mounting plate 7, along with all its components, to slide along the direction of the mounting grooves 12. After adjustment, the bolts are retightened. For example, the length of the mounting groove 12 can be designed to be 100mm, providing a sufficiently large adjustment stroke. M8 fixing bolts can be used to ensure the rigidity and stability of the connection after locking. The reset repeatability accuracy has been tested and can be controlled within 0.5mm, fully meeting the requirements for rapid production changeover on the production line.

[0030] As the core component for performing the bag-removing action, a total of eight vacuum suction cups 11 are divided into two groups, symmetrically arranged and fixedly installed on both sides of the lower surface of the suction cup mounting plate 7. This symmetrical layout helps to evenly distribute the suction force. Each vacuum suction cup 11 is connected to the central vacuum system of the vacuum bag-removing machine through an independent air pipe. More importantly, a high-response vacuum logic valve is installed in series on each of these air pipes. These vacuum logic valves receive instructions from the control system and can independently and precisely control the vacuum on / off of each vacuum suction cup 11. This allows the system to intelligently respond to abnormal situations such as local wrinkles or uneven suction surfaces that may occur on the packaging bag 3. For example, if a suction cup is pressed on a wrinkle of the packaging bag 3, resulting in a poor seal, its vacuum level will not reach the lower limit of the set range. The system determines that the suction cup has failed to adsorb. At this time, the control system will not interrupt the entire bag-removing process, but will issue an instruction to close only the vacuum logic valve on the specific suction cup's pipeline, causing it to stop working and abandon adsorption at that point. At the same time, the other seven suction cups that are adsorbing normally will continue to work. Because the suction cups are numerous and symmetrically arranged, even if one suction cup fails, the total suction force generated by the remaining suction cups is still sufficient to safely and stably lift a single packaging bag. For example, during the descent of the bag-lifting mechanism, if a suction cup contacts the protruding part of packaging bag 3 and forms a seal before the others, its vacuum level will rise rapidly and far exceed the set value. The system determines that this suction cup is about to "grip," which may cause stress concentration at that point during lifting, tearing the bag opening, or causing disturbance to the bag stack. As an optimization strategy, the control system can instruct a brief reduction in the opening degree of the logic valve of that suction cup or a brief pressure release to lower its vacuum level. After the other suction cups are in place, the normal operating pressure is restored, thereby achieving a balance of suction force among the suction cups. In this way, the system no longer relies on all suction cups working perfectly simultaneously. It can tolerate the failure of individual suction cups due to local anomalies, with the bag-lifting task completed by the other normally functioning suction cups, thus greatly improving the overall system reliability and suction success rate.

[0031] To organize and protect all these air pipes and control cables that power the vacuum logic valve, a cable chain mounting plate 6 is fixedly installed on the upper surface of the suction cup mounting plate 7, near the fixed plate 4. One end of a cable chain 5 made of engineering plastic is fixed to the cable chain mounting plate 6, and the other end is fixed to the machine frame. All air pipes and cables are placed in an orderly manner in the links of the cable chain 5. As the suction cup mounting plate 7 rises and falls, the cable chain 5 can bend and extend freely, effectively avoiding the tangling, wear and unnecessary pulling of the pipelines, and significantly extending their service life.

[0032] Directly below the vacuum suction cup 11, a placement plate 1 is provided to support the stack of packaging bags to be suctioned. This placement plate 1 is typically fixed to the machine frame by a bracket, and its position is relatively fixed. On the placement plate 1, a metal baffle is installed upright on the side near the fixed plate 4. This baffle is mainly used to longitudinally limit the stack of bags. On the other three sides of the placement plate 1, a set of brush damping assemblies is provided. Each set of brush damping assemblies includes a long strip brush body 2 fixed to the edge of the placement plate 1 by bolts, and a large number of soft bristles densely embedded in the brush body 2. These bristles are preferably made of anti-static nylon material or conductive fiber material, and their density can be set to 200 bristles per square centimeter. The effective length of the bristles extending out of the brush body 2 can be 20 mm. After surface treatment, the dynamic friction coefficient μ with the surface of common latex packaging bags 3 is maintained in the ideal range of 0.3 to 0.6, for example, 0.45. The metal baffle and the three sets of brush damping components together enclose a rectangular receiving area on the placement plate 1 for neatly stacking and placing the packaging bags 3.

[0033] The bag-picking mechanism operates as follows: In the initial state, several latex packaging bags 3 are stacked in the receiving area. The drive cylinder actuates, causing the entire suction cup mounting plate 7 and its vacuum suction cups 11 to move downwards until all vacuum suction cups 11 are in full contact with the surface of the topmost packaging bag 3. Subsequently, the vacuum system is activated, and each vacuum logic valve opens according to a preset program. The eight vacuum suction cups 11 simultaneously generate a strong suction force, firmly holding the topmost packaging bag 3. Next, the cylinder retracts, pulling the entire bag-picking mechanism upwards. At this time, the single bag that has been suctioned is lifted. During its detachment from the bag stack, the bristles on three sides gently scrape the surface of the bag below, using frictional resistance to effectively prevent a second bag from sticking in place, thus ensuring that only one bag is picked up at a time. Finally, the bag-picking mechanism moves to the bag-releasing station, the vacuum logic valve closes, the suction force disappears, and the bag is accurately released, completing one work cycle.

[0034] In summary, the bag-grabbing mechanism of this embodiment, by employing eight suction cups controlled by independent vacuum logic valves working in concert and combined with a brush damping assembly, successfully achieves stable and reliable single-bag gripping of large-diameter packaging bags from latex lines, completely solving the problems of leakage and double-bag failure. At the same time, its adjustable suction cup mounting plate design greatly enhances its adaptability to packaging bags of different specifications.

[0035] Example 2:

[0036] This second embodiment aims to protect a complete vacuum bag-retrieving machine that includes the bag-retrieving mechanism described in the first embodiment. In addition to the aforementioned bag-retrieving mechanism as its core execution component, this vacuum bag-retrieving machine necessarily includes a complete vacuum generation system, a mechanical transmission system for driving the bag-retrieving mechanism to perform multi-degree-of-freedom motion, and a centralized control electrical control system.

[0037] Specifically, the vacuum generation system typically includes a vacuum pump, a vacuum tank, gas processing components, and connecting pipelines. These pipelines connect to the vacuum logic valves on each vacuum suction cup 11 in the bag-picking mechanism, providing a stable and reliable vacuum source to the suction cups based on control signals. The mechanical transmission system typically includes at least one drive cylinder, as described in Embodiment 1, for driving the vertical movement of the bag-picking mechanism, and a drive unit for driving the entire bag-picking mechanism to reciprocate horizontally. This drive unit can be a servo motor-driven screw slide module or a cylinder-driven precision guide rail slider mechanism. Its purpose is to precisely transport the picked-up packaging bag 3 from the enclosed area to the next workstation, such as the bag-opening or bag-loading station. The electrical control system typically includes a programmable logic controller (PLC), a human-machine interface (HMI), various sensors such as position sensors and vacuum sensors, and pneumatic control components such as solenoid valves. It receives feedback signals from the sensors and sends precise control commands to the vacuum logic valves, drive cylinders, and servo motors, coordinating the automated operation of the entire bag-picking, bag-transferring, and bag-placing process. The bag-taking mechanism is securely mounted on the final execution end of the mechanical transmission system via its fixing plate 4, and the air pipes and cables on it are led back and connected to the air and electrical circuits of the whole machine via the drag chain 5.

[0038] The vacuum bag-retrieving machine described in Embodiment 2 inherits all the excellent characteristics of Embodiment 1 in its core bag-retrieving mechanism, thus also possessing the advantages of high reliability, high stability, and high efficiency. It is particularly suitable for deployment on production lines in latex, chemical, and food industries that require the processing of large-sized, heavy packaging bags with easily sticky surfaces, significantly improving the automation level and production efficiency of the packaging process.

[0039] Example 3:

[0040] This embodiment aims to protect a packaging production line that includes one or more vacuum bag-picking machines as key automated bag-loading units, as described in Embodiment 2. These vacuum bag-picking machines are integrated into the complete production line, working collaboratively with upstream bag storage, downstream bag-opening devices, metering and filling devices, sealing devices, and conveying equipment to form a seamless automated production system. Within this system, the vacuum bag-picking machine is responsible for efficiently and accurately removing the packaging bag 3 from the enclosed area and transferring it to the subsequent workstation. Its superior bag-picking performance provides the most fundamental and crucial guarantee for the continuous, stable, and efficient operation of the entire production line, ultimately enabling this packaging production line to demonstrate comprehensive efficiency and reliability far exceeding that of traditional production lines when dealing with the packaging of special materials such as latex.

Claims

1. A bag taking mechanism of a latex thread vacuum bag taking machine, characterized in that, include: A fixing plate (4) is installed on the telescopic rod of the cylinder of the vacuum bag removal machine. A connecting plate (8) is vertically mounted on the fixing plate (4); A suction cup mounting plate (7) is disposed below the connecting plate (8), and a guide assembly is provided between the suction cup mounting plate (7) and the connecting plate (8); The guide assembly includes a guide seat (9) disposed on the bottom surface of the connecting plate (8) and two guide rods (10) that slide within the guide seat (9). The bottom ends of the guide rods (10) are fixedly connected to the suction cup mounting plate (7) via connecting blocks, so that the extension and retraction of the drive cylinder between the guide rods (10) causes the suction cup mounting plate (7) to move up and down relative to the connecting plate (8) under the guidance of the guide assembly. A plurality of vacuum suction cups (11) are symmetrically mounted on the suction cup mounting plate (7) on both sides and connected to the vacuum system through pipelines. Each pipeline is provided with a vacuum logic valve corresponding to it. The cable chain mounting plate (6) and the cable chain (5) are installed on the suction cup mounting plate (7), and the pipeline and cable are laid inside the cable chain; The placement plate (1) is located below the vacuum suction cup (11). A baffle is provided on the side of the placement plate (1) near the fixing plate (4), and brush damping components are provided on the other three sides. The baffle and the three brush damping components form an enclosed area for placing packaging bags.

2. The latex thread vacuum-take-out bag taking mechanism according to claim 1, characterized in that: The brush damping assembly includes a brush body (2) disposed on the placement plate (1), and the brush body (2) is provided with bristles for contacting the surface of the packaging bag (3); The bristles are made of nylon or conductive fiber with a density of 100 to 300 bristles per square centimeter. The length of the bristles extending out of the brush body (2) is 10 mm to 30 mm, and the dynamic friction coefficient μ between the bristles and the surface of the packaging bag (3) is 0.3 to 0.

6.

3. The latex thread vacuum-take-out bag taking mechanism according to claim 1, characterized in that: The number of vacuum suction cups (11) is at least eight.

4. The latex thread vacuum-take-out bag taking mechanism according to claim 1, characterized in that: The suction cup mounting plate (7) has elongated mounting grooves (12) symmetrically opened on both sides. The connecting block is threaded with a fixing bolt that passes through the mounting groove (12). The fixing bolt can be tightly fitted with the bottom surface of the suction cup mounting plate (7) to achieve locking.

5. The latex thread vacuum-take-out machine taking mechanism according to claim 4, characterized in that: By loosening the fixing bolts and moving the position of the connecting block within the mounting groove (12), the horizontal position of the suction cup mounting plate (7) relative to the connecting plate (8) can be adjusted, and the adjustment stroke is consistent with the length of the mounting groove (12).

6. Vacuum bagging machine, characterized in that Includes the bag-retrieving mechanism as described in any one of claims 1 to 5.

7. Packaging line, characterized in that Includes the vacuum bag removal machine as described in claim 6.

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