Longitudinal conveying and paper cutting device for special-shaped carton transparent paper

Abstract

The utility model discloses a longitudinal conveying and paper cutting device for special-shaped carton cellophane paper, a system is vertically arranged in a cubic mode, and the cellophane paper is conveyed from top to bottom to reach a cutting station and a wrapping station. The system is sequentially provided with a horseshoe opening cutting mechanism, a horseshoe opening cutting mechanism and a horseshoe opening cutting mechanism from top to bottom, the paper feeding mechanism is used for conveying transparent paper downwards through power provided by a paper feeding roller; the cutter mechanism is used for cutting off transparent paper through a transparent paper cutter which is transversely arranged; the vacuum conveying mechanism comprises a plurality of vacuum groove long conveying belts and vacuum groove short conveying belts which are vertically arranged, and transparent paper is adsorbed through negative pressure and conveyed downwards; according to the stretching mechanism, fan-shaped stretching rollers coaxially installed on the two sides make contact with the two corner areas of the transparent paper in the rotating process and expand outwards, and smooth stretching of the transparent paper is achieved. The whole system drives all the mechanisms to start and stop in sequence through a servo motor, and efficient and accurate transparent paper conveying and cutting are achieved.

Description

Technical Field

[0001] The utility model relates to the field of cigarette box packaging equipment and technology, mainly to a technology for wrapping cigarette strips with transparent paper, in particular to a longitudinal conveying and cutting device for transparent paper of special-shaped strip boxes. Background Art

[0002] In recent years, competition in the cigarette consumption market has become increasingly fierce, and the demand for special-shaped boxes has become increasingly strong. A system equipment that can longitudinally convey transparent paper for wrapping special-shaped boxes has emerged. In actual production, when using it to wrap special-shaped boxes, a large number of unqualified products with misaligned glass lines appear. Cigarettes using special-shaped boxes are usually high-end products with high quality requirements. A large number of unqualified products need to be manually dismantled and repackaged, which on the one hand requires a lot of manpower and material resources and causes waste. On the other hand, if a large number of unqualified products are not completely eliminated and flow into the market, consumers will question the company's high-end products, thereby affecting the company's brand image in the minds of consumers and causing immeasurable losses. Therefore, a utility model is urgently needed to provide a control method for a longitudinal conveying system of transparent paper for special-shaped boxes that can meet the actual needs of production.

[0003] The existing conveyor system primarily pulls the transparent paper into position, cuts it into individual sheets, matches it to the cigarette cartons to be wrapped, and then delivers it to the wrapping station. The control method for this process primarily involves two stages. In the first stage, the transparent paper is conveyed by the paper feed roller to the transparent paper cutting station for cutting. In the second stage, the cut transparent paper, under the negative pressure of the vacuum chamber and the conveyor belt, is conveyed to the wrapping station for packaging into custom-shaped cartons. However, this control method and process suffers from low yield rates. In actual production, a large number of defective products, such as misaligned drawstrings and wrinkled laminations, are observed, resulting in a high rejection rate. Products using custom-shaped cartons are generally high-end products with extremely high quality requirements. A large number of products with misaligned drawstrings are rejected and require reprocessing, which wastes manpower and materials and significantly reduces production efficiency. Furthermore, once these substandard products enter the market, they significantly impact the image and positioning of these high-end products in the minds of consumers, immeasurably impacting the high-quality development of the company. Utility Model Content

[0004] In order to solve the above-mentioned problems and reduce the occurrence of products with misaligned teeth in the glass strip drawing process, on the basis of making full use of existing resources, the present utility model aims to design and implement a set of control systems and methods for a longitudinal conveying system of transparent paper that can meet the needs of high-quality production. Based on the inventor's many experiments and summaries, it was found that the direct cause of the misalignment of the glass strip drawing line is that the transparent paper on the wrapping station is in an uneven state during packaging. Therefore, the present utility model changes the control method of the existing longitudinal conveying system of transparent paper, and changes the existing two-stage conveying stroke of transparent paper to only one stage of conveying stroke. The transparent paper is conveyed to the wrapping station and then cut. The transparent paper has been stretched and positioned before cutting, so the transparent paper still maintains a flat spread state after cutting. The present utility model greatly solves the problem of uneven transparent paper on the wrapping station, thereby greatly reducing the defect rate of cigarette strips with misaligned teeth, reducing a lot of manpower and material resources, ensuring product quality and safety, and achieving the goal of continuously improving product quality.

[0005] Specifically, the utility model is implemented as follows: a longitudinal conveying and cutting device for transparent paper for special-shaped boxes, the system is arranged vertically and cubically, and the transparent paper is conveyed downward from the top to the cutting station and the wrapping station. The system is arranged from top to bottom in the following order:

[0006] The horseshoe-shaped cutting mechanism is arranged transversely in the upper area in front of the paper feed guide plate. The horseshoe knife is mounted on a transversely arranged horseshoe knife rotating shaft. A transmission wheel is mounted on one end of the horseshoe knife rotating shaft. The transmission wheel is connected to the output end of the horseshoe knife motor mounted on the side plate of the bracket through a horseshoe knife conveyor belt. The horseshoe knife can rotate to cut the transparent paper passing downward along the paper feed guide plate into a horseshoe-shaped cut.

[0007] The paper feeding mechanism is arranged transversely in the lower area in front of the paper feeding guide, and the inner side surface of the paper feeding roller contacts the surface of the transparent paper passing downward along the paper feeding guide and provides power through rotation to continue feeding downward;

[0008] The cutter mechanism is arranged transversely in the area below the paper feed roller, and includes a transversely arranged transparent paper cutter. The transparent paper cutter rotates around an axis so that the blade can contact the transparent paper and cut the transparent paper.

[0009] The vacuum conveying mechanism is arranged in the area below the cutter mechanism, and includes a plurality of long vacuum slot conveyor belts and short vacuum slot conveyor belts arranged vertically. The long vacuum slot conveyor belts and the short vacuum slot conveyor belts can rotate in a circular manner downward in the longitudinal direction. The short vacuum slot conveyor belt is located between the long vacuum slot conveyor belts on both sides;

[0010] The stretching mechanism is arranged in the lower area in front of the vacuum conveying mechanism. Two fan-shaped stretching rollers are coaxially installed on the two side areas. They can contact the two corner areas of the transparent paper during rotation and generate an outward expansion force to expand the paper.

[0011] The wrapping station is located in the area formed between the long conveyor belts of the vacuum slot on both sides, below the short conveyor belt of the vacuum slot, and above the stretching mechanism. The upper half of the transparent paper is fixed under the adsorption of the long conveyor belt of the vacuum slot and the short conveyor belt of the vacuum slot, and the lower half expands outward under the rotation of the two fan-shaped stretching rollers to achieve stretching and flattening.

[0012] Furthermore, the vacuum conveying mechanism includes: a vacuum plate with a built-in cavity or airway, and vacuum holes connected to the inner cavity are opened on the surface on both sides and the top of the plate to form a vacuum groove negative pressure belt, a vacuum groove main transmission shaft is installed above the vacuum plate, and a vacuum groove passive transmission shaft is installed below; there are two long vacuum groove conveyor belts, and a number of small holes are opened partially or completely on the surface, which are respectively arranged longitudinally in the vacuum grooves on both sides of the vacuum plate, and are mounted on the vacuum groove main transmission shaft and the vacuum groove passive transmission shaft. They move in a circle with the rotation of the vacuum groove main transmission shaft, and can absorb transparent paper and move accordingly.

[0013] Furthermore, there are at least three short conveyor belts of the vacuum slot, which are longitudinally installed in the top area of ​​the vacuum plate, one end of which is installed on the passive transmission shaft of the vacuum slot, and the other end of which is installed on the follower roller in the slot opened on the upper part of the vacuum plate. Several small holes are also opened partially or completely on the short conveyor belt of the vacuum slot, and there is a square vacuum slot below it. The negative pressure belt of the vacuum slot provides negative pressure adsorption to the transparent paper through the small holes.

[0014] Furthermore, the paper feeding mechanism includes a paper feeding roller and a paper feeding roller pad roller located behind the paper feeding roller. The transparent paper passes between the paper feeding roller and the paper feeding roller pad roller, and can generate a conveying force as the paper feeding roller rotates, so that the transparent paper is conveyed downward. The surfaces of both ends of the paper feeding roller are provided with outward-expanding spiral textures, which are used to unfold the transparent paper flatly and convey it downward.

[0015] Furthermore, the cutter mechanism includes a transparent paper cutter motor, which is installed on the side plate of the bracket and connected to the transparent paper cutter through a transmission component, and can control the axial rotation of the transparent paper cutter to cut the transparent paper horizontally.

[0016] Furthermore, the stretching mechanism includes a stretching shaft, which is connected by a stretching roller motor. Two fan-shaped stretching rollers are installed on the stretching shaft, each including a fan-shaped shift block that rotates with the shaft. The two fan-shaped shift blocks are arranged obliquely to form a relative figure eight structure, which can contact the surface of the transparent paper during rotation and provide downward and outward force as it rotates, thereby stretching and flattening the transparent paper.

[0017] Furthermore, the driving motors of the horseshoe-shaped cutting mechanism, paper feeding mechanism, cutter mechanism, vacuum conveying mechanism and stretching mechanism are all servo motors, and can execute their respective start and stop in sequence: the horseshoe-shaped cutting mechanism can cut a horseshoe-shaped groove on the transparent paper by rotating; the driving motor of the paper feeding roller is started to convey the transparent paper downward; as the transparent paper moves downward, the transparent paper reaches the negative pressure belt of the vacuum slot; the driving motor of the vacuum conveying mechanism is started to adsorb the transparent paper on the long conveyor belt and the short conveyor belt of the vacuum slot and convey it downward to the wrapping station, and stops after reaching the position; after the transparent paper reaches the wrapping station, the negative pressure of the vacuum plate is interrupted, and the negative pressure belt can release the negative pressure, at which time the fan-shaped stretching roller is started, which can press the two lower ends of the transparent paper and pull it downward and outward to flatten it; the fan-shaped stretching roller stops rotating after completing stretching; the negative pressure of the vacuum plate is restored, which can make the negative pressure belt obtain negative pressure, and the transparent paper is flatly adsorbed on the vacuum plate, and the transparent paper cutter is started, and after rotating, the cutter blade cuts the transparent paper and resets.

[0018] Working principle of the utility model: The system of the utility model is mainly composed of five parts: the horseshoe-shaped cutting mechanism is used to cut a horseshoe-shaped edge on the transparent paper. The paper feeding mechanism transports the transparent paper downward through the paper feeding roller and the paper feeding roller pad roller, and flattens the transparent paper by stretching the spiral texture. The cutter mechanism uses a transparent paper cutter to cut the transparent paper horizontally. The vacuum conveying mechanism includes a long vacuum groove conveyor belt and a short vacuum groove conveyor belt, which absorbs the transparent paper through negative pressure and transports it downward. The stretching mechanism applies an outward opening force to the two corner areas of the transparent paper through the fan-shaped stretching roller to flatten it. The key step of the utility model is to change the existing two-stage conveying stroke into one stage to ensure that the transparent paper has been stretched and flattened before cutting. The entire flattening process is assisted by the on-off switching of negative pressure adsorption. Before stretching, the negative pressure is disconnected, and a fan-shaped stretching roller with an obliquely arranged fan-shaped shift block applies an outward force to the two corners of the transparent paper, further ensuring the flatness of the transparent paper. Before cutting, negative pressure adsorption is restored to fix the flattened transparent paper. At this time, after cutting, the transparent paper remains stretched, wrinkle-free, and precisely positioned. Throughout the entire method, precise control of the virtual spindle and servo motor ensures that each mechanism starts and stops in sequence, achieving efficient automated production. This system can significantly reduce the occurrence of products with misaligned glass lines and improve product quality and production efficiency.

[0019] Beneficial technical effects of the utility model:

[0020] (1) Improved the yield rate of wrapping film: By changing the two-stage conveying journey of transparent paper to one stage and completing the stretching and positioning before cutting, the flatness of the transparent paper on the wrapping station is ensured, thereby effectively reducing the problem of misalignment of the glass pulling line, improving product quality, reducing product defects caused by unevenness, and improving the appearance quality and consistency of the final product.

[0021] (2) Reduced labor and material costs: Automated control systems and methods reduce the need for manual intervention, lowering labor costs. They also reduce rework and scrap rates due to quality issues, saving raw materials and other resources.

[0022] (3) Good system reliability and stability: The use of servo motors and precise control methods makes the entire conveying and cutting process more stable and controllable. The system is flexible in design and can be adjusted and expanded according to different production requirements and processes to meet the packaging needs of products of different specifications and types. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural perspective view of the longitudinal paper conveying and cutting device for special-shaped transparent paper strips of the present invention;

[0024] Figure 2 This is an exploded schematic diagram of the structure of the longitudinal paper conveying and cutting device for special-shaped transparent paper strips of the present invention;

[0025] Figure 3 This is a structural schematic diagram of the transparent paper conveying section of the longitudinal paper conveying and cutting device for special-shaped transparent paper strips of the utility model;

[0026] Figure 4 A schematic diagram of the use state of the longitudinal paper conveying and cutting device for special-shaped transparent paper strips of the utility model;

[0027] Figure 5 This is a schematic diagram of the adsorption conveying principle of the vacuum conveying mechanism of the utility model;

[0028] Figure 6 This is a schematic diagram of the steps of unfolding the transparent paper by the stretching mechanism of the present invention;

[0029] Figure 7 This is a schematic diagram of the process steps when the stretching mechanism of the utility model cuts the transparent paper and wraps it with the cigarette box;

[0030] Figure 8 This is a schematic diagram of the stretching mechanism of the present invention when the transparent paper is being unfolded;

[0031] Figure 9 This is a three-dimensional diagram of the stretching mechanism of the utility model when cutting the transparent paper and wrapping it with the cigarette box;

[0032] in:

[0033] 1—Transparent paper;

[0034] 2 - horseshoe cutting mechanism, 21 - horseshoe knife, 22 - horseshoe knife motor, 23 - horseshoe knife conveyor belt, 24 - horseshoe knife shaft, 25 - transmission wheel;

[0035] 3—paper feeding mechanism, 31—paper feeding guide, 32—paper feeding roller, 33—paper feeding roller pad;

[0036] 4—cutter mechanism, 41—transparent paper cutter, 42—transparent paper cutter motor;

[0037] 5—vacuum conveying mechanism, 51—vacuum tank long conveyor belt, 52—vacuum tank short conveyor belt; 53—vacuum plate, 54—vacuum tank main transmission shaft, 55—vacuum tank passive transmission shaft;

[0038] 6 - stretching mechanism, 61 - fan-shaped stretching roller, 62 - stretching shaft, 63 - stretching roller motor, 64 - fan-shaped shifting block;

[0039] 7—Wrapping station. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0041] Example 1: A longitudinal paper-transporting and cutting device for special-shaped transparent paper strips

[0042] This system is a longitudinal conveying and cutting device for transparent paper 1 for special-shaped boxes. The system is arranged in a vertical cubical configuration. Transparent paper 1 is conveyed downward from the top, passing through a cutting station and a wrapping station 7. From top to bottom, the system comprises a horseshoe-shaped cutting mechanism 2, a paper feeding mechanism 3, a cutting mechanism 4, a vacuum conveying mechanism 5, and a stretching mechanism 6.

[0043] Main components and functions

[0044] 1. Horseshoe-shaped cutting mechanism 2: This mechanism is positioned horizontally in the upper area in front of the paper guide 31. The horseshoe-shaped cutter 21 rotates along its axis to regularly create horseshoe-shaped cuts at specific, evenly spaced locations along the drawstring of the transparent paper 1 as it passes downward along the paper guide 31. These cuts are the ends of the pre-embedded drawstrings on cigarette packaging for easy film removal. The horseshoe-shaped cutting mechanism 2 precisely cuts the desired shape into the transparent paper 1.

[0045] 2. Paper Feed Mechanism 3: This is located horizontally in the lower area in front of the paper guide 31. The inner side of the paper feed roller 32 contacts the surface of the transparent paper 1 as it passes downward along the paper guide 31. Its rotation provides power to continue conveying the transparent paper 1 downward. The rollers 32 are designed with outward-flashing spiral patterns on both ends to help flatten and convey the transparent paper 1 downward.

[0046] 3. Cutter Mechanism 4: This is located horizontally below the paper feed roller 32. It includes a horizontally arranged transparent paper cutter 41. The cutter mechanism 4 rotates around its axis, causing the blade to contact and cut the transparent paper 1. Cutter Mechanism 4 is driven by a servo motor, ensuring precision and consistency in the cutting process.

[0047] 4. Vacuum conveying mechanism 5: This is located in the area below the cutter mechanism 4. It includes several vertically arranged long vacuum groove conveyor belts 51 and short vacuum groove conveyor belts 52. These conveyor belts can rotate downward in a circular manner in the longitudinal direction, and the short vacuum groove conveyor belt 52 is located between the long vacuum groove conveyor belts 51 on both sides. The vacuum plate 53 has a built-in cavity or airway, and a vacuum hole connected to the inner cavity is opened on the surface to form a vacuum groove negative pressure belt. The surface of the long vacuum groove conveyor belt 51 and the short vacuum groove conveyor belt 52 has a number of small holes, which provide negative pressure adsorption to the transparent paper 1 through these small holes, keeping it close to the conveyor belt in the vacuum groove, so that it can run with the conveyor belt, achieving a constant speed and direction of downward conveyance.

[0048] 5. Stretching mechanism 6: Located in the lower, forward area of ​​the vacuum conveyor mechanism 5. Two fan-shaped stretching rollers 61 are coaxially mounted on the sides. These rollers contact the corners of the transparent paper 1 during rotation, creating an outward-expanding force. The stretching mechanism 6, with its fan-shaped shifting blocks 64 arranged diagonally, forms a figure-eight structure. During rotation, these rollers contact the surface of the transparent paper 1, applying a downward and outward force as the paper rotates, stretching and flattening the paper 1.

[0049] 6. Wrapping Station 7: Located between the long vacuum trough conveyor belts 51 on both sides, below the short vacuum trough conveyor belt 52, and above the stretching mechanism 6. The upper half of the transparent paper 1 is fixed by the suction of the long vacuum trough conveyor belts 51 and the short vacuum trough conveyor belts 52. The flattening and stretching operation is performed before cutting. The vacuum trough disconnects the negative pressure suction, allowing the transparent paper 1 to droop naturally. The upper end is fixed by the conveyor rollers, and the lower half is stretched outward by the rotation of the two fan-shaped stretching rollers 61 to achieve flattening. The negative pressure suction is then restarted, and the transparent paper 1 is cut, completing a one-step process. Wrapping Station 7 is the core area of ​​the entire system. Here, the transparent paper 1 is precisely positioned and stretched, and is taken away from the center area by the horizontally entering strip box to be wrapped and coated at the next station.

[0050] Example 2: In order to achieve a better wrapping effect of the special-shaped strip box transparent paper 1 and reduce the rate of misalignment of the glass pulling line, the utility model, based on the transparent paper 1 conveying and cutting functions of the system in Example 1, also provides a control method for the longitudinal conveying system of the special-shaped strip box transparent paper 1, the control method specifically comprising the following steps:

[0051] First, create a virtual spindle with a phase range of 0°-360°;

[0052] Second, the host industrial computer reads the virtual spindle phase information;

[0053] Third, the host industrial computer controls the start and stop of each servo motor by obtaining the spindle phase information. The specific process includes the following:

[0054] ① The transparent paper 1 is conveyed to the wrapping station 7. When the main shaft phase is 40°, the vacuum slot motor starts to start, driving the long vacuum slot conveyor belt 51. As the long conveyor belt moves, the negative pressure belt acquires negative pressure. When the main shaft phase is 65°, the paper feed roller 32 motor starts to start to convey the transparent paper 1 downward. As the transparent paper 1 moves downward, it reaches the vacuum slot negative pressure belt. The negative pressure belt suctions the transparent paper 1 onto the long vacuum slot conveyor belt 51, and the paper 1 moves downward along with the long vacuum slot conveyor belt 51. When the main shaft phase reaches 275°, the paper feed roller 32 stops. The transparent paper 1 is conveyed 280 mm downward by the combined action of the paper feed roller 32 and the vacuum slot, arriving at the wrapping station 7. At the same time, when the main shaft phase is 60° and the horseshoe knife 21 motor phase is 50°, the horseshoe knife 21 cuts the wire. When the transparent paper 1 is conveyed to the wrapping station 7, the phase of the motor of the fan-shaped stretching roller 61 runs from 0° to 249°, and the fan-shaped stretching roller (61) enters the pre-stretching station.

[0055] ② Negative pressure belt negative pressure release. When the spindle phase is 275 degrees, the host industrial computer controls the solenoid valve to close, and the negative pressure in the vacuum tank negative pressure belt is released.

[0056] ③ The fan-shaped spreader roller 61 spreads the transparent paper 1. As the main axis phase moves from 275° to 325°, the fan-shaped spreader roller 61 operates from the pre-spreading station to spread the transparent paper 1. As the main axis phase moves from 325° to 360°, the fan-shaped spreader roller 61 compresses the transparent paper 1 to ensure its flatness before packaging.

[0057] ④ The negative pressure belt regains negative pressure. When the spindle phase is 325°, the host industrial computer controls the solenoid valve to open, and the vacuum tank negative pressure belt regains negative pressure, adsorbing the stretched transparent paper 1 on the vacuum plate 53 to ensure the flatness of the transparent paper 1 before packaging.

[0058] ⑤ Transparent paper cutter 41 completes cutting of transparent paper 1. As the spindle phase moves from 0° to 360°, the phase of transparent paper cutter motor 42 also moves from 0° to 360°. When the spindle phase reaches 360°, transparent paper cutter 41 cuts transparent paper 1, resulting in a glass cutout with a size of 328 mm by 280 mm (length by width).

[0059] ⑥ The push plate pushes the cigarette strips into the mold box for formation.

[0060] It should be understood that the above-described specific embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.

Claims

1. A longitudinal paper conveying and cutting device for special-shaped transparent paper strips, characterized in that The system is arranged in a vertical cubic configuration, with the transparent paper (1) being transported downward from the top to the cutting station and the wrapping station (7). The system is arranged from top to bottom in the following order: The horseshoe-shaped cutting mechanism (2) is arranged transversely in the upper area in front of the paper feed guide (31), and the horseshoe knife (21) is mounted on the horseshoe knife rotating shaft (24) arranged transversely. A transmission wheel (25) is mounted on one end of the horseshoe knife rotating shaft (24), and the transmission wheel (25) is connected to the output end of the horseshoe knife motor (22) mounted on the side plate of the bracket through the horseshoe knife conveyor belt (23); so that the horseshoe knife (21) can cut the transparent paper (1) passing downward along the paper feed guide (31) into a horseshoe-shaped opening by rotating; A paper feeding mechanism (3) is arranged transversely in a lower area in front of the paper feeding guide (31), wherein the inner side surface of the paper feeding roller (32) contacts the surface of the transparent paper (1) passing downward along the paper feeding guide (31) and provides power through rotation to continue feeding downward; A cutter mechanism (4) is arranged transversely in an area below the paper feed roller (32), and includes a transversely arranged transparent paper cutter (41). The transparent paper cutter (41) rotates about an axis so that a blade can contact the transparent paper (1) and cut the transparent paper (1). A vacuum conveying mechanism (5) is arranged in the area below the cutter mechanism (4), and includes a plurality of vacuum slot long conveyor belts (51) and vacuum slot short conveyor belts (52) arranged vertically. The vacuum slot long conveyor belts (51) and the vacuum slot short conveyor belts (52) can rotate in a circular manner downward in the longitudinal direction. The vacuum slot short conveyor belts (52) are located between the vacuum slot long conveyor belts (51) on both sides. The stretching mechanism (6) is arranged in the lower area in front of the vacuum conveying mechanism (5), and two fan-shaped stretching rollers (61) are coaxially installed on the two side areas, which can contact the two corner areas of the transparent paper (1) during rotation and form an outward expansion force to expand outward; The wrapping station (7) is located in an area formed between the long vacuum trough conveyor belts (51) on both sides, below the short vacuum trough conveyor belt (52), and above the stretching mechanism (6). The upper half of the transparent paper (1) is fixed under the adsorption of the long vacuum trough conveyor belt (51) and the short vacuum trough conveyor belt (52), and the lower half is stretched outward under the rotation of the two fan-shaped stretching rollers (61) to achieve stretching and flattening.

2. The longitudinal paper-cutting device according to claim 1, characterized in that: The vacuum conveying mechanism (5) comprises: The vacuum plate (53) has a built-in cavity or airway, and has vacuum holes on both sides and the top of the plate surface that communicate with the inner cavity to form a vacuum groove negative pressure belt. A vacuum tank main transmission shaft (54) is installed above the vacuum plate (53), and a vacuum tank passive transmission shaft (55) is installed below the vacuum plate (53); The long conveyor belts (51) of the vacuum groove are two in number, and a plurality of small holes are opened partially or completely on the surface. The belts are longitudinally arranged in the vacuum grooves on both sides of the vacuum plate (53), and are mounted on the main transmission shaft (54) of the vacuum groove and the passive transmission shaft (55) of the vacuum groove. The belts move in a circular manner with the rotation of the main transmission shaft (54) of the vacuum groove, and can absorb the transparent paper (1) and move accordingly.

3. The longitudinal paper-cutting device according to claim 2, characterized in that: There are at least three short conveyor belts (52) of the vacuum slot, which are longitudinally mounted on the top area of ​​the vacuum plate (53), one end of which is mounted on the passive transmission shaft (55) of the vacuum slot, and the other end of which is mounted on a follower roller in a slot opened on the upper part of the vacuum plate (53). A plurality of small holes are also opened partially or entirely on the short conveyor belts (52) of the vacuum slot, and a square vacuum slot is formed below the short conveyor belts. The negative pressure belt of the vacuum slot provides negative pressure adsorption to the transparent paper (1) through the small holes.

4. The longitudinal paper-cutting device according to claim 1, characterized in that: The paper feeding mechanism (3) comprises a paper feeding roller (32) and a paper feeding roller pad roller (33) located behind the paper feeding roller (32). The transparent paper (1) passes between the paper feeding roller (32) and the paper feeding roller pad roller (33). The paper feeding roller (32) generates a conveying force as the paper feeding roller (32) rotates, so that the transparent paper (1) is conveyed downward. The surfaces of both ends of the paper feeding roller (32) are provided with outwardly expanding stretching spiral textures, which are used to flatten the transparent paper (1) and convey it downward.

5. The longitudinal paper-cutting device according to claim 1, characterized in that: The cutter mechanism (4) comprises a transparent paper cutter motor (42), which is mounted on a side plate of the bracket and connected to the transparent paper cutter (41) via a transmission component, and can control the axial rotation of the transparent paper cutter (41) to cut the transparent paper (1) horizontally.

6. The longitudinal paper-cutting device according to claim 1, characterized in that: The stretching mechanism (6) includes a stretching shaft (62) connected by a stretching roller motor (63), and two fan-shaped stretching rollers (61) are mounted on the stretching shaft (62). Each fan-shaped stretching roller includes a fan-shaped shifting block (64) that rotates with the shaft. The two fan-shaped shifting blocks (64) are arranged obliquely to form a relative figure-eight structure. The fan-shaped shifting blocks (64) can contact the surface of the transparent paper (1) during rotation and provide a downward and outward force with the rotation, thereby stretching and flattening the transparent paper (1).

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