An automatic membrane docking device

Abstract

The application discloses an automatic film connecting device, which comprises a rack, two film winding rollers arranged in parallel on the rack and used for winding films, a film connecting unit comprising a film connecting seat, a first film connecting rod and a second film connecting rod, wherein the first film connecting rod and the second film connecting rod are arranged in parallel and slidably installed on the film connecting seat, fusing heating wires are arranged on the opposite sides of the first film connecting rod and the second film connecting rod, and fuse cutting heating wires are arranged on the sides of the first film connecting rod and the second film connecting rod close to the film winding rollers. When the first film connecting rod and the second film connecting rod are close to each other, the two films can be connected by the fusing heating wires, and one of the films can be cut by the fuse cutting heating wires. The main film and the standby film are connected by the fusing heating wires, so that the cutting difficulty and the waste film cutting problem caused by the material characteristics of the adhesive tape are avoided.

Description

Technical Field

[0001] This application relates to the technical field of automatic packaging equipment, and more particularly to an automatic film splicing device. Background Technology

[0002] Currently, most film wrapping machines on packaging production lines are designed to hold two rolls of film. When the roll of film being used is about to run out, it can quickly and seamlessly connect with another roll of spare film, thus avoiding production interruptions due to film changing operations. Specifically, by using pre-prepared spare film, it achieves automatic or semi-automatic film connection the instant the main film runs out, greatly shortening film changing time, ensuring continuous and stable operation of the production line, and bringing significant economic benefits to enterprises.

[0003] However, despite the excellent performance of dual-roll film feeding mechanisms in improving production line efficiency, existing film splicing technology remains a key factor restricting its further optimization and stable operation. Currently, the widely used film splicing method in the industry is to use adhesive tape to bond two rolls of film together. This traditional splicing method is still used mainly because it is relatively simple to operate and has a relatively low cost. However, from the perspective of actual production results, adhesive tape splicing has many undeniable drawbacks.

[0004] Specifically, the adhesive tape itself has a certain degree of flexibility and stickiness. When the splice reaches the center seal cutter along with the film, the cutter is often interfered with by the characteristics of the tape material during the cutting process. The tape's flexibility makes it prone to deformation or displacement during cutting, while its stickiness can cause adhesion between the cutter and the tape, severely affecting the cutter's normal cutting action. This cutting difficulty often results in the waste film breaking at the splice, not only wasting packaging materials and increasing production costs, but also causing short-term shutdowns of the production line, further disrupting the production rhythm and reducing production efficiency. In addition, after the waste film breaks, operators need to perform additional cleaning and re-splitting operations, which not only increases the intensity of manual labor, but may also cause other production problems due to untimely or improper operation, negatively impacting the stability of the entire packaging production line and product quality.

[0005] Therefore, developing a more reliable and efficient film splicing technology to overcome the drawbacks of existing tape splicing methods has become an important technical problem that urgently needs to be solved in the field of automated film wrapping machines for packaging production lines. Utility Model Content

[0006] The purpose of this utility model embodiment is to provide a solution that can solve the above-mentioned problems existing in the prior art.

[0007] To achieve the above objectives, this application adopts the following technical solution:

[0008] An automatic film splicing device includes a frame on which:

[0009] Two film-winding rollers, arranged parallel to each other on the left and right, are used to install the film.

[0010] The film splicing unit includes a film splicing base, a first film splicing rod, and a second film splicing rod. The first film splicing rod and the second film splicing rod are arranged parallel to each other and can be slidably mounted on the film splicing base. A fusion heating wire is respectively provided on the opposing sides of the first film splicing rod and the second film splicing rod, and a fusion heating wire is respectively provided on the side of the first film splicing rod and the second film splicing rod near the film winding roller.

[0011] When the first film-attaching rod and the second film-attaching rod are brought close to each other, the two films can be fused together by the fusion heating wire, and one of the films can be fused off by the fusion heating wire.

[0012] Optionally, the membrane mounting base is provided with a slide rail extending in the left-right direction, and the first membrane mounting rod and the second membrane mounting rod are respectively connected to a slider, which is slidably mounted on the slide rail.

[0013] Optionally, each end of the first and second membrane-connecting rods is connected to a slider, and two slide rails are correspondingly installed on the membrane-connecting seat.

[0014] Optionally, the membrane mounting base includes a base plate and two side plates symmetrically connected to the base plate.

[0015] The seat side plate located at the rear is fixedly connected to the frame, and the seat side plate located at the front is provided with a viewing window.

[0016] Optionally, the film splicing unit is disposed below the film winding roller, and a film exit guide roller is also disposed below the film splicing unit;

[0017] The base plate is provided with a film passage hole, through which the downward film output of the film roll can extend to the film output guide roller, and then be guided out of the film by the film output guide roller.

[0018] Optionally, the film-attaching unit further includes two telescopic cylinders mounted on the film-attaching seat. The first film-attaching rod and the second film-attaching rod are respectively connected to one of the telescopic cylinders, and the first film-attaching rod and the second film-attaching rod are driven to move closer or further apart by the telescopic cylinders.

[0019] Optionally, the frame is also equipped with two tensioning guide rollers, each corresponding to one of the two film rolls, which can be used to tension the film extending from the corresponding film roll.

[0020] Optionally, the frame is also equipped with a film exit guide roller, which is used to guide the film exit.

[0021] The film-exiting guide roller includes a laying guide roller, which is provided with a first thread and a second thread that are symmetrical about each other along the axial direction. The first thread and the second thread have opposite helical directions. The laying guide roller is used to lay out the film.

[0022] Optionally, the film exit guide roller may further include a pressing guide roller disposed near the laying guide roller. The pressing guide roller is located upstream of the laying guide roller in the film feeding direction, and the pressing guide roller increases the contact area between the laying guide roller and the film by pressing.

[0023] Optionally, the frame is also equipped with two photoelectric sensors corresponding to the two film rolls respectively, and the two photoelectric sensors are used to detect whether the film on the corresponding film roll is exhausted.

[0024] The beneficial effects of this application are as follows: Based on the automatic film splicing device provided by this utility model, compared with the traditional method of splicing film using adhesive tape, this device uses a fusion heating wire to fuse and connect the main film and the spare film, avoiding the difficulties in cutting and the problem of waste film breakage caused by the characteristics of adhesive tape. The fusion connection method is more robust and reliable, ensuring the stable operation of the spliced ​​film in subsequent packaging operations, reducing production failures caused by film splicing problems, and improving the overall stability of the packaging production line. During the film splicing process, the device can quickly and accurately complete the film splicing and fusion cutting actions without the need for complex manual film pulling and repositioning operations. This not only saves labor costs but also greatly shortens the film change time, reduces production delays caused by downtime for film change, improves the production efficiency of the packaging production line, and helps enterprises better meet market demands and enhance market competitiveness. Attached Figure Description

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

[0026] Figure 1 This is a schematic diagram of the automatic film splicing device described in the embodiments of this application;

[0027] Figure 2 for Figure 1 Enlarged view of region A in the middle;

[0028] Figure 3 for Figure 1 Enlarged view of region B in the middle;

[0029] Figure 4 This is a schematic diagram of the structure of the membrane unit described in the embodiment of this application;

[0030] Figure 5This is a schematic diagram of the film flow of the automatic film splicing device described in the embodiments of this application.

[0031] In the picture:

[0032] 1. Frame; 2. Film winding roller; 3. Film splicing unit; 311. First film splicing rod; 312. Second film splicing rod; 32. Fusion heating wire; 33. Fusion heating wire cut-off; 34. Slide rail; 35. Slider; 36. Film splicing seat; 361. Seat base plate; 3611. Film passage hole; 362. Seat side plate; 3621. Viewing window; 37. Telescopic cylinder; 4. Tensioning guide roller; 5. Film exit guide roller; 51. Laying guide roller; 52. Pressing guide roller; 6. Photoelectric sensor; 7. Film. Detailed Implementation

[0033] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] Currently, most film wrapping machines on packaging production lines are designed to hold two rolls of film. When the roll of film being used is about to run out, it can quickly and seamlessly connect with another roll of spare film, thus avoiding production interruptions due to film changing operations. Specifically, by using pre-prepared spare film, it achieves automatic or semi-automatic film connection the instant the main film runs out, greatly shortening film changing time, ensuring continuous and stable operation of the production line, and bringing significant economic benefits to enterprises.

[0037] However, despite the excellent performance of dual-roll film feeding mechanisms in improving production line efficiency, existing film splicing technology remains a key factor restricting its further optimization and stable operation. Currently, the widely used film splicing method in the industry is to use adhesive tape to bond two rolls of film together. This traditional splicing method is still used mainly because it is relatively simple to operate and has a relatively low cost. However, from the perspective of actual production results, adhesive tape splicing has many undeniable drawbacks.

[0038] Specifically, the adhesive tape itself has a certain degree of flexibility and stickiness. When the splice reaches the center seal cutter along with the film, the cutter is often interfered with by the characteristics of the tape material during the cutting process. The tape's flexibility makes it prone to deformation or displacement during cutting, while its stickiness can cause adhesion between the cutter and the tape, severely affecting the cutter's normal cutting action. This cutting difficulty often results in the waste film breaking at the splice, not only wasting packaging materials and increasing production costs, but also causing short-term shutdowns of the production line, further disrupting the production rhythm and reducing production efficiency. In addition, after the waste film breaks, operators need to perform additional cleaning and re-splitting operations, which not only increases the intensity of manual labor, but may also cause other production problems due to untimely or improper operation, negatively impacting the stability of the entire packaging production line and product quality.

[0039] Therefore, developing a more reliable and efficient film-bonding technology to overcome the drawbacks of existing tape-bonding methods has become a crucial technical problem that urgently needs to be solved in the field of automated film wrapping machines for packaging production lines.

[0040] To overcome the above technical problems, such as Figures 1-5 As shown, this application provides an automatic film splicing device, including a frame 1, on which the following are mounted:

[0041] Two film-winding rollers 2, arranged parallel to each other on the left and right, are used to install the film;

[0042] The film splicing unit 3 includes a film splicing base 36, a first film splicing rod 311, and a second film splicing rod 312. The first film splicing rod 311 and the second film splicing rod 312 are arranged horizontally and horizontally and can be slidably mounted on the film splicing base 36. A fusion heating wire 32 is respectively provided on the opposing sides of the first film splicing rod 311 and the second film splicing rod 312, and a fusion heating wire 33 is respectively provided on the side of the first film splicing rod 311 and the second film splicing rod 312 near the film winding roller 2.

[0043] When the first film-attaching rod 311 and the second film-attaching rod 312 approach each other, the two films 7 can be fused together by the fusion heating wire 32, and one of the films 7 can be fused off by the fusion heating wire 33.

[0044] In the specific structure of the automatic film splicing device in this embodiment, two film rolls 2 are arranged in parallel left and right. This layout provides a basis for the simultaneous installation of the main film and the spare film, allowing the two film rolls to run orderly within the same device, facilitating subsequent film splicing operations. The film splicing unit 3 is the core part of the entire device, including a film splicing base 36, a first film splicing rod 311, and a second film splicing rod 312. The first film splicing rod 311 and the second film splicing rod 312 are also arranged in parallel left and right and can be slidably mounted on the film splicing base 36. This slidable design allows the film splicing rods to be flexibly adjusted in position as needed to achieve precise film splicing. A fusion heating wire 32 and a fusion cutting heating wire 33 are respectively set at specific positions on the film splicing rods. The fusion heating wire 32 is located on the opposite side of the two film splicing rods and is used to fuse the main film and the spare film together. The fusion cutting heating wire 33 is located on the side close to the film roll 2 and is used to cut off the excess of the main film. The layout and design of each component are closely centered around the film splicing function, resulting in a compact and reasonable structure.

[0045] The working principle of the automatic film splicing device in this embodiment is as follows:

[0046] Initial state: During normal packaging operations, the main film on the left film roll 2 is in use, and the spare film on the right film roll 2 is in standby state. At this time, the first film receiving rod 311 and the second film receiving rod 312 are in their initial positions, and no operation is performed on the main film or the spare film.

[0047] Membrane preparation: When it is detected that the left main membrane is about to be exhausted (in fact, there is still a part of the remaining material that has not passed through the membrane bonding unit 3), the staff pulls out the right spare membrane and attaches it to the main membrane. Then the main membrane continues to roll up to roll in the attached spare membrane.

[0048] Film splicing and melting: As the spare film passes through the film splicing unit 3, the first film splicing rod 311 and the second film splicing rod 312 approach each other and simultaneously press the overlapping portion of the main film and the spare film. At this time, the fusion heating wires 32 on both sides start to heat up, causing the contact area of ​​the main film and the spare film to fuse together, thereby connecting the two rolls of film. At the same time, the melting heating wire 33 on the first film splicing rod 311 on the left also heats up (conversely, when the roll of film on the right is about to be exhausted, the melting heating wire 33 on the second film splicing rod 312 on the right heats up), melting off the remaining portion of the main film, completing the film splicing operation.

[0049] Subsequent operations: After the film splicing is completed, the staff installs a new roll of film on the left film roll 2 as a spare film for the next film splicing. The entire device is then restored to its initial standby state, waiting for the next film splicing operation when the main film is exhausted.

[0050] In summary, based on the automatic film splicing device provided in this embodiment, compared to the traditional method of splicing film using adhesive tape, this device uses a fusion heating wire 32 to fuse the main film and the spare film together, avoiding the cutting difficulties and waste film breakage problems caused by the characteristics of adhesive tape. The fusion connection method is more robust and reliable, ensuring the stable operation of the spliced ​​film 7 in subsequent packaging operations, reducing production failures caused by splicing problems, and improving the overall stability of the packaging production line. During the splicing process, the device can quickly and accurately complete the splicing and fusion actions without the need for complex manual film pulling and repositioning operations. This not only saves labor costs but also significantly shortens film changeover time, reduces production delays caused by downtime for film changes, improves the production efficiency of the packaging production line, and helps enterprises better meet market demands and enhance market competitiveness.

[0051] In one embodiment, reference is made to Figure 3 The membrane mounting base 36 is provided with a slide rail 34 extending in the left and right direction. The first membrane mounting rod 311 and the second membrane mounting rod 312 are respectively connected to sliders 35, and the sliders 35 are slidably mounted on the slide rail 34.

[0052] The cooperation of slide rail 34 and slider 35 provides a stable sliding track for the film splicing rod, enabling precise control of its movement distance and position. This significantly improves splicing accuracy, ensuring that the main film and spare film are perfectly aligned during fusion, reducing problems such as film misalignment and incomplete sealing caused by splicing deviations, and improving packaging quality. Furthermore, this sliding structure makes the movement of the film splicing rod smoother, reducing the impact of mechanical vibration or shaking on the overall stability of the device. During long-term operation, the stable structure ensures the reliability and durability of the splicing device, reducing the probability of malfunctions and minimizing maintenance costs and downtime.

[0053] In one embodiment, the two ends of the first film-attaching rod 311 and the second film-attaching rod 312 are respectively connected to a slider 35, and two slide rails 34 are correspondingly installed on the film-attaching seat 36.

[0054] The structural design of the double-ended slider 35 and the two slide rails 34 makes the film splicing rod more stable during the sliding and splicing process. It can accurately align and press the overlapping parts of the main film and the spare film. This stable splicing state can ensure that the fusion heating wire 32 heats the film 7 evenly, making the fusion between the two rolls of film stronger and reducing the problem of film 7 separation or leakage caused by poor splicing, which greatly improves the quality and sealing of the packaging.

[0055] In one embodiment, the membrane mounting base 36 includes a base plate 361 and two side plates 362 symmetrically connected to the base plate 361.

[0056] The seat side plate 362 located on the rear side is fixedly connected to the frame 1, and the seat side plate 362 located on the front side is provided with a viewing window 3621.

[0057] The film-coating base 36 consists of a base plate 361 and two side plates 362 symmetrically connected to the base plate 361. This three-plate structure is simple and stable. The base plate 361 provides a basic support for the entire film-coating base 36, ensuring that the film-coating unit 3 can be stably installed on the frame 1. The two side plates 362 further enhance the structural strength of the film-coating base 36, while also protecting and positioning the internal components. To further improve reliability, a reinforcing strip is connected between the top sides of the two side plates 362 to form a more stable frame structure.

[0058] The viewing window 3621 on the front side panel 362 utilizes the light transmittance of transparent materials (such as glass, plastic, etc.), allowing operators to directly observe the sliding of the splicing rod inside the splicing unit 3, the mating of the thin film 7, and the operation of the fusion heating wire 32 and the fusion cutting heating wire 33 without opening the splicing seat 36. Operators can monitor the splicing progress and quality in real time through the viewing window 3621, promptly identifying and adjusting any potential problems.

[0059] In one embodiment, the film-attaching unit 3 is disposed below the film-winding roller 2, and a film-exiting guide roller 5 is also disposed below the film-attaching unit 3;

[0060] The base plate 361 is provided with a film passage hole 3611, through which the film of the film roll 2 extends downward to the film exit guide roller 5, and is then guided out of the film by the film exit guide roller 5.

[0061] The film exit guide roller 5 is positioned below the film receiving unit 3, forming a film 7 transport path from top to bottom consisting of the film winding roller 2, the film receiving unit 3, and the film exit guide roller 5, which facilitates the smooth flow of the film 7. At the same time, this layout makes full use of the vertical space of the frame 1, making the entire device structure more compact.

[0062] The base plate 361 is provided with a film passage hole 3611. This design provides a channel for the downward film exit of the film roll 2. The film 7 on the film roll 2 can smoothly extend to the film exit guide roller 5 through the film passage hole 3611, ensuring the continuous transmission of the film 7 within the device. The shape and size of the film passage hole 3611 should be reasonably designed according to the width and thickness of the film 7 to ensure that the film 7 can pass through smoothly without being subjected to excessive compression or friction.

[0063] During the packaging process, the film 7 on the film roll 2 exits downwards under its own tension and the traction force of the subsequent packaging equipment. The film 7 first passes through the film passage hole 3611 on the base plate 361, and then reaches the film exit guide roller 5. The film exit guide roller 5 guides the film 7 forward through its own rotation, conveying the spliced ​​film 7 to the subsequent packaging process. When the main film is about to run out and a splicing operation is required, the splicing unit 3 splices and melts the main film and the spare film below the film roll 2. After splicing is completed, the film 7 continues to be conveyed through the film passage hole 3611 and the film exit guide roller 5. The entire splicing and conveying process works together to ensure the continuity of the packaging operation.

[0064] In one embodiment, the film-attaching unit 3 further includes two telescopic cylinders 37 mounted on the film-attaching seat 36. The first film-attaching rod 311 and the second film-attaching rod 312 are respectively connected to one of the telescopic cylinders 37, and the first film-attaching rod 311 and the second film-attaching rod 312 are driven to move closer or further apart by the telescopic cylinders 37.

[0065] In this device, by controlling the timing and pressure of inflating and deflating the two telescopic cylinders 37, the synchronous or asynchronous movement of the first film-attaching rod 311 and the second film-attaching rod 312 can be achieved. When film-attaching operation is required, the piston rods of the two telescopic cylinders 37 are extended simultaneously, driving the first film-attaching rod 311 and the second film-attaching rod 312 to move closer to each other; after film-attaching is completed, the piston rods are retracted, causing the film-attaching rods to separate from each other.

[0066] The telescopic cylinder 37 has high motion precision and stability, and can accurately control the movement distance and speed of the film splicing rod. Driven by the telescopic cylinder 37, the film splicing rod can quickly and accurately reach the predetermined film splicing position, and can maintain stable pressure during the film splicing process, thereby improving the quality and reliability of film splicing and reducing problems such as film misalignment and poor sealing caused by inaccurate film splicing.

[0067] In one embodiment, the frame 1 is also equipped with two tensioning guide rollers 4, which correspond to the two film rolls 2 respectively. The tensioning guide rollers 4 can be used to tension the film 7 extending from the corresponding film roll 2.

[0068] The tension guide roller 4 is installed on the frame 1 and is positioned in a suitable location in the film exit path of the film roll 2. Its specific position should be designed according to the transport route of the film 7, the layout of the packaging equipment, and the required tension level to ensure that the film 7 can smoothly pass through the tension guide roller 4 after extending from the film roll 2 and obtain an ideal tension state. When the film 7 becomes slack or uneven in tension during transport, the corresponding tension guide roller 4 can be adjusted in time to ensure that the film 7 always maintains an appropriate tension state so that the subsequent film splicing unit 3 can accurately and stably perform the film splicing operation.

[0069] In one embodiment, combined with Figure 3 The frame 1 is also equipped with a film exit guide roller 5, which is used to guide the film exit.

[0070] The film-exiting guide roller 5 includes a flattening guide roller 51, which is provided with a first thread and a second thread that are symmetrical about each other along the axial direction. The first thread and the second thread have opposite helical directions. The flattening guide roller 51 is used to flatten and unfold the film 7.

[0071] The film exit guide roller 5 provides forward guidance for the film 7 through its own rotational motion. When the film 7 is transferred from the film receiving unit 3 or other upstream components, it will come into contact with the film exit guide roller 5. Under the action of the friction force on the surface of the guide roller, the film 7 will move forward with the rotation of the guide roller, thereby achieving the purpose of guiding the film out.

[0072] Importantly, the first and second threads on the laying guide roller 51 have opposite helical directions. When the laying guide roller 51 rotates, due to the special structure of the threads, it generates frictional and tensile forces on the film 7 in different directions. Specifically, the first and second threads apply forces to both sides of the film 7, causing the film 7 to be subjected to a force that unfolds to both sides during transport. This unfolds the film 7, which might otherwise have wrinkles or curls, ensuring that the film 7 enters the subsequent packaging stage in a flat state. The laying guide roller 51 can unfold the film 7, effectively reducing wrinkles, bubbles, and other problems that occur during the packaging process, making the packaged product look more beautiful and flat. At the same time, the flat film 7 can better fit the packaged material, improving the sealing and protection of the packaging, thereby extending the product's shelf life and improving the overall quality of the product.

[0073] In one embodiment, the film exit guide roller 5 further includes a pressing guide roller 52 disposed near the laying guide roller 51. The pressing guide roller 52 is located upstream of the laying guide roller 51 in the film feeding direction. The pressing guide roller 52 increases the contact area between the laying guide roller 51 and the film 7 by pressing.

[0074] As the film 7 passes under the pressure roller 52, the pressure roller 52, under its own weight or external pressure, presses the film 7 against the laying roller 51. Since the pressure roller 52 is located upstream of the laying roller 51 in the film feeding direction, the film 7 is already under a certain pressure before entering the area of ​​the laying roller 51, allowing the film 7 to make more full contact with the surface of the laying roller 51 when it reaches the laying roller 51, thus increasing the contact area.

[0075] The laying guide roller 51 uses its special threaded structure to lay and unfold the film 7, while the pressing guide roller 52 increases the contact area to ensure that the film 7 is more effectively subjected to the force of the threads on the laying guide roller 51. Working together, the pressing guide roller 52 provides good contact conditions for the laying guide roller 51, enabling the laying guide roller 51 to complete the laying and unfolding of the film 7 more stably and efficiently. This avoids insufficient contact that could result in some areas of the film 7 not being effectively laid, thereby further improving packaging quality.

[0076] In one embodiment, the frame 1 is further equipped with two photoelectric sensors 6, each corresponding to one of the two film rolls 2. The two photoelectric sensors 6 are used to detect whether the film on the corresponding film roll 2 is exhausted.

[0077] Under normal operating conditions, the film roll 2 has sufficient film 7. The light beam emitted by the photoelectric sensor 6 is blocked or reflected by the film 7, and the receiver receives a stable light signal, outputting a corresponding electrical signal indicating that the film roll is not exhausted. As the packaging operation progresses, the film 7 on the film roll 2 gradually decreases. When the film roll is about to be exhausted or completely exhausted, the light beam emitted by the photoelectric sensor 6 is no longer effectively blocked or reflected by the film 7. The light signal received by the receiver changes, and thus outputs a different electrical signal, indicating that the film roll on the corresponding film roll 2 has been exhausted. The electrical signal output by the photoelectric sensor 6 is transmitted to the control system of the packaging equipment. The control system analyzes and processes these signals, determines the film exhaustion status according to the preset program, and makes corresponding control decisions, such as triggering an alarm or switching to a spare film.

[0078] The photoelectric sensor 6 monitors the film roll depletion status in real time. When the film roll is depleted, the control system can automatically activate an alarm to remind staff to replace the film in time, thus avoiding problems such as packaging interruption and product quality issues caused by the sudden depletion of the film roll.

[0079] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, 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 application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0080] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0081] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0082] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. An automatic film splicing device, characterized in that, Includes a frame (1), on which are mounted: Two film-winding rollers (2) are arranged parallel to each other on the left and right sides, respectively for installing film; The film splicing unit (3) includes a film splicing seat (36), a first film splicing rod (311) and a second film splicing rod (312). The first film splicing rod (311) and the second film splicing rod (312) are arranged in parallel to each other and can be slidably installed on the film splicing seat (36). A fusion heating wire (32) is respectively provided on the opposing sides of the first film splicing rod (311) and the second film splicing rod (312). A fusion heating wire (33) is respectively provided on the side of the first film splicing rod (311) and the second film splicing rod (312) near the film winding roller (2). When the first film-attaching rod (311) and the second film-attaching rod (312) approach each other, the two films (7) can be fused together by the fusion heating wire (32), and one of the films (7) can be fused off by the fusion heating wire (33).

2. The automatic film splicing device according to claim 1, characterized in that, The membrane mounting base (36) is provided with a slide rail (34) extending in the left and right direction. The first membrane mounting rod (311) and the second membrane mounting rod (312) are respectively connected to sliders (35), and the sliders (35) are slidably mounted on the slide rail (34).

3. The automatic film splicing device according to claim 2, characterized in that, The first membrane receiving rod (311) and the second membrane receiving rod (312) are respectively connected to a slider (35) at both ends, and two slide rails (34) are correspondingly installed on the membrane receiving seat (36).

4. The automatic film splicing device according to claim 2, characterized in that, The membrane mounting base (36) includes a base plate (361) and two side plates (362) symmetrically connected to the base plate (361); The seat side plate (362) located on the rear side is fixedly connected to the frame (1), and the seat side plate (362) located on the front side is provided with a viewing window (3621).

5. The automatic film splicing device according to claim 4, characterized in that, The film-attaching unit (3) is located below the film-winding roller (2), and a film-exiting guide roller (5) is also located below the film-attaching unit (3); The base plate (361) is provided with a film passage hole (3611). The film exiting downwards from the film roll (2) can extend through the film passage hole (3611) to the film exit guide roller (5), and then be guided out of the film by the film exit guide roller (5).

6. The automatic film splicing device according to claim 2, characterized in that, The film-attaching unit (3) further includes two telescopic cylinders (37) mounted on the film-attaching seat (36). The first film-attaching rod (311) and the second film-attaching rod (312) are respectively connected to one of the telescopic cylinders (37). The telescopic cylinders (37) drive the first film-attaching rod (311) and the second film-attaching rod (312) to move closer or further apart.

7. The automatic film splicing device according to claim 1, characterized in that, The frame (1) is also equipped with two tensioning guide rollers (4) that correspond to the two film winding rollers (2) respectively. The tensioning guide rollers (4) can be used to tension the film (7) extending from the corresponding film winding roller (2).

8. The automatic film splicing device according to claim 1, characterized in that, The frame (1) is also equipped with a film exit guide roller (5), which is used to guide the film exit. The film-exiting guide roller (5) includes a flattening guide roller (51), which is provided with a first thread and a second thread that are symmetrical about each other along the axial direction. The first thread and the second thread have opposite helical directions. The flattening guide roller (51) is used to flatten and unfold the film (7).

9. The automatic film splicing device according to claim 8, characterized in that, The film exit guide roller (5) also includes a pressing guide roller (52) disposed near the laying guide roller (51). The pressing guide roller (52) is located upstream of the laying guide roller (51) in the film feeding direction. The pressing guide roller (52) increases the contact area between the laying guide roller (51) and the film (7) by pressing.

10. The automatic film splicing device according to claim 1, characterized in that, The frame (1) is also equipped with two photoelectric sensors (6) corresponding to the two film rolls (2) respectively. The two photoelectric sensors (6) are used to detect whether the film on the corresponding film roll (2) is exhausted.

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