Multi-station synchronous hot sealing device of bag making machine

Abstract

This utility model discloses a multi-station synchronous hot-pressing and sealing device for a bag-making machine, aiming to solve the problem of low production efficiency in a single station when the hot-pressing time is sufficient to ensure quality. The device includes a frame, a drive mechanism, a first hot-pressing and sealing mechanism, and at least one second hot-pressing and sealing mechanism. The second hot-pressing and sealing mechanism is mounted on the frame via symmetrically arranged vertical slide rails, a first slider, a horizontal slide rail, and a second slider. Its second lower hot-pressing component is fixed, while the position of the second upper hot-pressing component is adjustable. The drive mechanism is driven by the horizontal slide rail to achieve synchronous movement. By adjusting the distance between each station to an integer multiple of the bag length, this utility model enables the bag-making machine to simultaneously complete the hot-pressing and sealing of multiple bags and point-breaking within the pause interval after each feeding, thereby multiplying production efficiency without changing the individual hot-pressing time. The device has a reasonable structure, is easy to adjust, and is easily expandable to more stations.

Description

Technical Field

[0001] This utility model belongs to the technical field of bag making equipment, specifically relating to a hot-press sealing device for a bag making machine. This device achieves simultaneous sealing of multiple bags within one work cycle through multiple parallel workstations using synchronous hot pressing, thereby significantly improving production efficiency. Background Technology

[0002] In the intermittent production of roll-type plastic bags (such as garbage bags and food storage bags), the workflow of the bag-making machine is as follows: after the film material is folded in half, the feeding mechanism pulls it for one bag length and then pauses → the heat-sealing mechanism heat-seales the film material and simultaneously breaks it → the feeding mechanism restarts to pull the next bag length, and so on. Only one plastic bag can be produced per work cycle. Existing intermittent bag-making machines are usually equipped with only one set of heat-sealing mechanisms. Their production efficiency is directly limited by the operating frequency of the heat-sealing mechanism. Since heat sealing requires a certain holding time to ensure quality, this determines the minimum working cycle time of the machine, thus limiting further increases in production speed. To increase capacity, the working cycle must be accelerated, but this may lead to insufficient heat-sealing time and decreased sealing quality; or it may require investment in a more powerful and faster drive system, which is costly. Therefore, those skilled in the art have been seeking a solution that can effectively improve the production efficiency of intermittent bag-making machines without shortening the individual heat-sealing time or significantly increasing drive costs. Utility Model Content

[0003] The purpose of this invention is to overcome the efficiency bottleneck of existing bag-making machines in single-station production mode and provide a multi-station synchronous hot-pressing sealing device. This device arranges multiple hot-pressing stations side-by-side in the film material conveying direction and synchronizes their operation, simultaneously sealing and breaking multiple bags within one hot-pressing cycle, thereby increasing production efficiency many times over.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A multi-station synchronous hot-press sealing device for a bag making machine includes a frame, a drive mechanism, and a first hot-press sealing mechanism and at least one second hot-press sealing mechanism arranged in parallel.

[0006] The first hot-press sealing mechanism includes a first upper hot-press component and a first lower hot-press component, which are fixedly installed on the frame and driven by the drive mechanism to perform mold closing and mold opening movements in the vertical direction.

[0007] The frame has symmetrical vertical slide rails on its left and right sides, and each vertical slide rail is equipped with a first slider that can slide along it. A transverse slide rail is fixedly connected between the first sliders on both sides, and the extension direction of the transverse slide rail is consistent with the film conveying direction. A second slider that can slide along the transverse slide rail is equipped with it. The second hot-press sealing mechanism includes a second upper hot-press assembly and a second lower hot-press assembly. The second lower hot-press assembly is fixedly installed on the frame, and the second upper hot-press assembly is installed on the second slider.

[0008] The driving mechanism is connected to the transverse slide rail and is used to synchronously drive the transverse slide rail, the second slider, and the second upper hot-pressing component of the second hot-pressing sealing mechanism to move in the vertical direction, so that the first hot-pressing sealing mechanism and the second hot-pressing sealing mechanism can achieve precise synchronous hot-pressing operation.

[0009] Preferably, the upper hot-pressing components of both the first and second hot-pressing sealing mechanisms are integrated with a point-cutting cutter, which is used to complete the point-cutting separation between bags while hot-pressing and sealing.

[0010] Preferably, the transverse slide rail is provided with a locking component for locking the position of the second slider, so as to adjust and fix the distance between the two hot pressing stations to adapt to the production needs of different bag lengths.

[0011] Preferably, the transverse slide rail may also be provided with an additional second slider, and a third hot-press sealing mechanism or an upper hot-press assembly of a hot-press sealing mechanism may be installed, thereby enabling synchronous production at more workstations by expanding the number of second sliders.

[0012] The drive mechanism that enables the first and second hot-press sealing mechanisms to move synchronously can take various forms known in the art. For example, it can be a common power source (such as a drive shaft) that drives the first hot-press sealing mechanism through a first transmission component (such as a drive arm) and simultaneously drives the transverse slide rail through a second transmission component (such as another drive arm); or it can be two independent drive components (such as cylinders or electric cylinders) that are controlled separately but synchronized through circuits or programs.

[0013] The beneficial effects of this utility model are:

[0014] 1. Increased production efficiency: Through multi-station synchronous operation, multiple finished bags can be generated at the same time with each hot pressing action. Compared with traditional single-station equipment, the production efficiency is theoretically increased several times under the same working cycle.

[0015] 2. Ensure sealing quality: Since the hot pressing time at each station is exactly the same as in the single-station mode, the original hot pressing process parameters are fully inherited, and the sealing strength and quality are fully guaranteed. There is no need to sacrifice quality in pursuit of speed.

[0016] 3. Flexible adjustment and multi-purpose: The distance between each hot pressing station can be steplessly adjusted through the horizontal slide rail and the second slider, so as to accurately match the production requirements of bags of different sizes, greatly enhancing the versatility of the equipment.

[0017] 4. High scalability and cost-effectiveness: By simply adding hot pressing components and utilizing a slide rail adjustment system, and using the original drive mechanism for synchronous drive, a significant increase in production capacity can be achieved at a relatively low hardware cost. It is also easy to expand to three or more workstations, and the modification and maintenance costs are controllable.

[0018] 5. Smooth operation and high precision: The combination of vertical slide rails arranged symmetrically on the left and right with the first slider supports and guides the horizontal slide rail, ensuring the stability of the upper hot pressing component and its alignment with the lower hot pressing component during the up and down movement of the second hot pressing sealing mechanism, thereby improving the consistency of hot pressing sealing quality. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model.

[0020] Figure 2 This is a left-side view of Embodiment 1 of the present invention.

[0021] Figure 3 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0022] The diagram shows: 1. Frame; 2. First hot-press sealing mechanism; 21. First upper hot-press assembly; 22. First lower hot-press assembly; 3. Second hot-press sealing mechanism; 31. Second upper hot-press assembly; 32. Second lower hot-press assembly; 4. Vertical slide rail; 5. First slider; 6. Horizontal slide rail; 7. Second slider; 8. Drive mechanism; 9. Third hot-press sealing mechanism; 91. Third upper hot-press assembly; 92. Third lower hot-press assembly. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1

[0027] like Figures 1-2 As shown, the device in this embodiment is installed on the frame 1 of an intermittent bag-making machine. The first hot-press sealing mechanism 2 is fixedly installed by a bracket, and its first upper hot-press assembly 21 and first lower hot-press assembly 22 are driven by the drive mechanism 8.

[0028] The drive mechanism (8) is used to provide synchronous driving force. As one possible implementation, the drive mechanism (8) may include a drive shaft that is connected to both the first hot-press sealing mechanism (2) and the transverse slide rail (6) via a link or drive arm to ensure their synchronous movement.

[0029] To achieve synchronization and adjustability of the second workstation, vertical slide rails 4 are symmetrically arranged on the left and right sides of the frame 1. The first slider 5 is fixedly connected to the horizontal slide rail 6. The horizontal slide rail 6 is connected to the output end of the drive mechanism 8, and can move up and down along the vertical slide rail 4 under its drive via the first slider 5. The second slider 7 is fitted onto the horizontal slide rail 6 and can slide along it, and is fixed by bolts or other locking devices. The second upper hot-pressing component 31 of the second hot-pressing sealing mechanism 3 is installed on the second slider 7, and its second lower hot-pressing component 32 is fixed to the frame 1.

[0030] Working process: After being folded in half, the film material is intermittently pulled by the feeding mechanism (not shown in the figure). Each time it is fed, the film material advances a distance of two bag lengths and then stops. At this time, the drive mechanism 8 is activated, driving the first upper hot-pressing component 21 and the first lower hot-pressing component 22 of the first hot-pressing sealing mechanism 2 to close the mold via the crank connecting rod. At the same time, the transverse slide rail 6 is driven to move downward along the vertical slide rail 4 via the first slider 5, thereby driving the second slider 7 and the second upper hot-pressing component 31 to move downward and close the mold with the second lower hot-pressing component 32. This allows the first and second hot-pressing sealing mechanisms to synchronously heat-press the film material. Since the two stations are separated by a distance (one bag length), this synchronous hot-pressing action simultaneously forms two sealing lines and a break line at the middle point on the film material, thus producing two independent bags at once. After the hot pressing is completed, the drive mechanism 8 drives all upper hot-pressing components to return to their positions, and the feeding mechanism is activated again, repeating the cycle.

[0031] Spacing adjustment: When it is necessary to change the length of the production bag, simply loosen the locking bolt of the second slider 7, move it along the transverse slide rail 6, so that the center distance between the two heat pressing stations is equal to the new bag length, and then tighten it again.

[0032] Example 2

[0033] like Figure 3 As shown, based on Embodiment 1, to achieve higher production capacity, another second slider 7 is added to the transverse slide rail 6, and the third upper hot-pressing assembly 91 of the third hot-pressing sealing mechanism 9 is installed on it. Correspondingly, the third lower hot-pressing assembly 92 of the third hot-pressing sealing mechanism 9 is fixedly installed on the frame 1. The distance between the three hot-pressing stations (first, second, and third) is adjusted to the bag length. In this configuration, the feeding mechanism feeds three bag lengths at a time. The drive mechanism 8 can produce three bags simultaneously with one synchronous hot-pressing action. This structure clearly demonstrates the easy scalability of this device.

[0034] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A multi-station synchronous hot-press sealing device for a bag-making machine, comprising a frame (1), a first hot-press sealing mechanism (2) disposed on the frame (1), and a driving mechanism (8), wherein the first hot-press sealing mechanism (2) comprises a first upper hot-press component (21) and a first lower hot-press component (22), and the driving mechanism (8) drives the first upper hot-press component (21) and the first lower hot-press component (22) of the first hot-press sealing mechanism (2) to perform mold closing and mold opening movements in the vertical direction, characterized in that: It also includes at least one second hot-press sealing mechanism (3); vertical slide rails (4) are symmetrically arranged on the left and right sides of the frame (1), and a first slider (5) that can slide along each vertical slide rail (4) is mounted on each side; a transverse slide rail (6) is fixedly installed between the first sliders (5) on both sides, and the extension direction of the transverse slide rail (6) is consistent with the film material conveying direction; a second slider (7) that can slide along the transverse slide rail (6) is mounted on the transverse slide rail (6); the second hot-press sealing mechanism (3) includes a second upper hot-press assembly (31) and a second lower hot-press assembly (32), the second lower hot-press assembly (32) is fixedly installed on the frame (1), and the second upper hot-press assembly (31) is installed on the second slider (7); The driving mechanism (8) is configured to simultaneously drive the first hot-press sealing mechanism (2) to perform mold closing and mold opening movements, and simultaneously drive the transverse slide rail (6) and its second slider (7) and the second upper hot-press assembly (31) to move in the vertical direction, so that the first hot-press sealing mechanism (2) and the second hot-press sealing mechanism (3) can perform synchronous hot-pressing operations. The distance between the first hot-press sealing mechanism (2) and the second hot-press sealing mechanism (3) in the film material conveying direction is adjustable and suitable to be adjusted to adapt to the bag length of the plastic bag to be prepared, so that the device can simultaneously complete the hot-pressing sealing of two bags in one working cycle of intermittent bag making.

2. The multi-station synchronous hot-press sealing device according to claim 1, characterized in that: The first upper hot-pressing assembly (21) of the first hot-pressing sealing mechanism (2) integrates a bit-cutting knife.

3. The multi-station synchronous hot-press sealing device according to claim 1, characterized in that: The second upper hot-pressing assembly (31) of the second hot-pressing sealing mechanism (3) integrates a bit-cutting knife.

4. The multi-station synchronous hot-press sealing device according to claim 1, characterized in that: The transverse slide rail (6) is provided with a locking component for locking the position of the second slider (7).

5. The multi-station synchronous hot-press sealing device according to claim 1, characterized in that: At least two second sliders (7) are provided on the transverse slide rail (6), and an upper hot pressing component of an additional hot pressing sealing mechanism is installed on each second slider (7). A lower hot pressing component of the additional hot pressing sealing mechanism is fixedly installed on the frame (1) to realize the synchronous operation of three or more hot pressing stations.

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