Novel sealing equipment

Abstract

The invention relates to novel sealing equipment, and belongs to the technical field of packaging bag sealing. The sealing assembly is arranged on the rack and used for sealing the plastic bag; the feeding assembly comprises a feeding straight roller, feeding inclined rollers and a feeding platform, the feeding straight roller is rotationally arranged on the rack, the axis of the feeding straight roller is perpendicular to the moving direction of a plastic bag to be sealed, the number of the feeding inclined rollers is two, the feeding inclined rollers are arranged in a splayed shape, the feeding inclined rollers are rotationally arranged on the rack, and the feeding platform is arranged on the rack. An included angle is formed between the axis of the feeding inclined roller and the moving direction of a plastic bag to be sealed, and the feeding platform is arranged on the rack in a sliding mode and located below the feeding straight roller and the feeding inclined roller; the dust removal assembly is arranged on the rack and used for eliminating dust and static electricity on a plastic bag to be sealed. The feeding table is located on the side of the rack and used for containing plastic bags to be sealed. Longitudinal pushing and transverse stretching flattening can be synchronously achieved in the plastic bag conveying process, and the problem that wrinkles are likely to be caused when a single roller is used for feeding is solved.

Description

Technical Field

[0001] This application relates to the technical field of sealing packaging bags, and in particular to a novel sealing device. Background Technology

[0002] With the continuous development of the commodity economy, the requirements for packaging of various products are also increasing. As a common packaging material, the sealing quality of plastic bags directly affects the airtightness and shelf life of products. Good sealing equipment can improve packaging efficiency, reduce production costs, and ensure the stability of product quality during circulation. Therefore, technological innovation in sealing equipment has always been a focus of the packaging industry.

[0003] Traditional plastic bag sealing operations typically employ a relatively simple method. The feeding process usually relies on manual placement of the plastic bag to the sealing position, or a single straight roller feeding device that uses the friction between the roller and the bag's surface to move the bag. If wrinkles appear on the surface of the plastic bag after it has been fed by a single straight roller and is about to enter the sealing area, it will affect the sealing quality and the aesthetics of the sealed area.

[0004] Therefore, a new sealing device is urgently needed. Summary of the Invention

[0005] To address the problem that wrinkles appear on the surface of plastic bags just before sealing, affecting the sealing quality and the aesthetics of the sealed area, this application provides a novel sealing device.

[0006] This application provides a novel sealing device, which adopts the following technical solution: A new type of sealing equipment includes: frame; A sealing assembly is mounted on the frame. The sealing assembly includes an upper sealing plate and a lower sealing plate. The upper sealing plate and the lower sealing plate are close to each other to compress the plastic bag. The lower sealing plate and / or the upper sealing plate are equipped with heating elements. A feeding assembly is mounted on the frame. The feeding assembly includes a feeding straight roller, a feeding inclined roller, and a feeding platform. The feeding straight roller is rotatably mounted on the frame, and its axis is perpendicular to the direction of movement of the plastic bag to be sealed. There are two feeding inclined rollers arranged in a figure-eight shape. The feeding inclined rollers are rotatably mounted on the frame, and their axes form an angle with the direction of movement of the plastic bag to be sealed. The outer edges of the feeding roller and the outer edges of the feeding inclined roller are simultaneously in contact with the outer surface of the plastic bag to be sealed. The feeding platform is slidably mounted on the frame and located below the feeding straight roller and the feeding inclined roller. A dust removal assembly is mounted on the frame. The dust removal assembly includes an ion air knife, which is located above the feeding platform and is used to remove dust and static electricity from the plastic bags to be sealed. The loading platform is located on the side of the frame and is used to hold plastic bags to be sealed.

[0007] By adopting the above technical solution and setting up a feeding assembly including a straight feeding roller and two inclined feeding rollers arranged in a figure-eight shape, longitudinal pushing and lateral stretching can be achieved simultaneously during the conveying of plastic bags. This effectively eliminates wrinkles on the bag surface caused by folding, stacking, or uneven conveying, ensuring a smooth and wrinkle-free sealing area. In conjunction with an ion air knife set above the feeding platform, dust and static charge on the surface of the plastic bag can be efficiently removed before sealing, preventing impurities from adhering or static interference from affecting the sealing fusion quality. The overall equipment layout is reasonable, realizing continuous automated operation from feeding, flattening, dust removal to sealing. This not only significantly improves the aesthetics and sealing reliability of the seal but also increases production efficiency and reduces quality fluctuations caused by manual intervention.

[0008] Optionally, the two feeding skew rollers have the same structure and are symmetrically arranged, and the two feeding skew rollers rotate at the same speed.

[0009] By adopting the above technical solution, and by designing the two feeding skew rollers to have the same structure, symmetrical arrangement and consistent rotation speed, it can be ensured that the lateral tensile force applied by the two rollers to the plastic bag has equal magnitude and opposite direction in the component force perpendicular to the conveying direction. This effectively flattens the wrinkles while preventing the plastic bag from shifting or twisting during the conveying process, ensuring that the bag always moves stably along the predetermined path, and further improving the consistency and alignment accuracy of the sealing position.

[0010] Optionally, the axis of the feeding straight roller and the axis of the feeding inclined roller are located in the same horizontal plane, and the outer diameter of the feeding straight roller and the outer diameter of the feeding inclined roller are the same.

[0011] By adopting the above technical solution, and by making the axes of the feeding straight roller and the feeding inclined roller on the same horizontal plane and using the same outer diameter design, the contact conditions between each roller and the surface of the plastic bag are consistent. This avoids uneven force or local stress concentration caused by differences in roller height or diameter, thereby making the plastic bag more uniform and stable in the process of conveying and flattening, further improving the flattening effect and reducing the risk of plastic bag deformation or damage.

[0012] Optionally, both the feeding straight roller and the feeding inclined roller are fitted with silicone sleeves or rubber sleeves.

[0013] By adopting the above technical solution, silicone or rubber sleeves are fitted on the surfaces of the feeding straight roller and the feeding inclined roller, which can significantly increase the coefficient of friction between the roller surface and the plastic bag, effectively preventing slippage during the conveying process and ensuring reliable transmission of pushing and stretching forces. At the same time, the soft and elastic sleeve material can adapt to plastic bags of different thicknesses and materials, providing gentle contact pressure and avoiding hard scratches or indentations on the bag surface, thus expanding the applicability of the equipment.

[0014] Optionally, the feeding assembly further includes a feeding base plate, a feeding bracket, a first feeding driver, and a feeding spring. The feeding base plate is disposed on the frame, the feeding bracket is slidably disposed on the feeding base plate, the first feeding driver is fixed on the feeding base plate and its output end is connected to the feeding bracket, one end of the feeding spring is connected to the feeding base plate and the other end is connected to the feeding bracket, and both the feeding straight roller and the feeding inclined roller are rotatably disposed on the feeding bracket.

[0015] By adopting the above technical solution and setting a pressure adjustment mechanism including a feeding base plate, a sliding feeding bracket, a first feeding driver, and a feeding spring, the entire feeding roller group has the ability to float and adjust vertically, and can automatically adjust the clamping force according to the actual thickness of the plastic bag. This design ensures that plastic bags of different thicknesses can obtain sufficient friction driving force and flattening force, while avoiding excessive stretching or damage to the plastic bags due to excessive pressure, thus realizing adaptive conveying and flattening of packaging materials of different specifications.

[0016] Optionally, the feeding assembly further includes a first driver, a second driver, and a third driver. The first driver is disposed on the feeding bracket and its output end is connected to the roller shaft of the feeding straight roller. The second driver and the third driver are both disposed on the feeding bracket and their output ends are respectively connected to the roller shafts of the two feeding inclined rollers.

[0017] By adopting the above technical solution, and by configuring independent drivers (first, second, and third drivers) for the feeding straight roller and the two feeding skew rollers respectively, independent and precise control of the speed of each roller is achieved. Operators can flexibly adjust the speed matching relationship between the straight roller and the skew roller according to the material, thickness, and flattening requirements of the plastic bag, optimize the synergistic effect of longitudinal conveying and transverse stretching, thereby achieving the best flattening quality while conveying efficiently, and enhancing the flexibility and adaptability of equipment process adjustments.

[0018] Optionally, the feeding assembly further includes a second feeding driver and a guide. The second feeding driver is fixed on the frame and its output end is connected to the feeding platform. The guide is located on the feeding platform and the frame and is used to guide the movement of the feeding platform.

[0019] By adopting the above technical solution, a second feeding driver and guide are added to drive the feeding platform to slide back and forth along the conveying direction of the plastic bag. This allows the platform to work in coordination with the rotating feeding roller above, providing full support and auxiliary propulsion for the plastic bag. This design effectively prevents the bag from sagging or deviating due to its own weight when the span is long, ensuring that the plastic bag remains flat and centered before entering the sealing station, thus improving the stability and positioning accuracy of the feeding process.

[0020] Optionally, the sealing assembly further includes a sealing base plate, a sealing bracket, a sealing driver, and a sealing spring. The sealing base plate is fixedly mounted on the frame, the sealing bracket is slidably mounted on the sealing base plate, the sealing driver is mounted on the sealing base plate and its output end is connected to the sealing bracket, the sealing driver is located below the sealing base plate, one end of the sealing spring is connected to the sealing base plate and the other end is connected to the sealing bracket, the lower sealing plate is mounted on the sealing base plate, the upper sealing plate is mounted on the sealing bracket, and the lower sealing plate is located directly below the upper sealing plate.

[0021] By adopting the above technical solution, the sealing assembly adopts a layout with a fixed sealing base plate, a sliding sealing bracket, a lower sealing driver, and a sealing spring. The structure is compact and the drive is stable. The sealing spring provides buffering and automatic reset functions, which allows the upper and lower sealing plates to adapt to slight unevenness in the sealing area of ​​the plastic bag during the pressing process, ensuring uniform distribution of heat pressure, thereby achieving a firm and neat sealing effect. At the same time, it reduces the impact load on the driving components and extends the service life of the equipment.

[0022] Optionally, the dust removal assembly further includes a dust removal bracket, which is mounted on the frame, and the ion air knife is mounted on the dust removal bracket.

[0023] By adopting the above technical solution and installing the ion air knife using an adjustable dust removal bracket, it is easy to adjust the installation position and air outlet angle of the air knife according to the passing height and width of the plastic bag. This ensures that the ion air can fully and evenly cover the surface of the bag, efficiently remove dust and neutralize static electricity, and provide a clean and static-free working environment for the subsequent heat sealing process, further improving the stability of the sealing quality and the cleanliness of the product appearance.

[0024] Optionally, the feeding straight roller, the feeding inclined roller, the ion air knife, and the sealing upper plate are arranged sequentially along the moving direction of the plastic bag to be sealed.

[0025] By adopting the above technical solution, the functional modules are arranged sequentially along the direction of plastic bag movement in the order of feeding straight roller → feeding inclined roller → ion air knife → sealing plate, forming a coherent and efficient process flow. The plastic bag is first conveyed by straight roller, then flattened by inclined roller, then dusted and destaticated, and finally enters the sealing station. The connection between each process is smooth and without interference. While ensuring that each function is fully utilized, the equipment layout is optimized, and efficient and high-quality continuous automated sealing operation is achieved.

[0026] In summary, this application includes at least one of the following beneficial technical effects: By employing a feeding assembly that includes a straight feeding roller and symmetrically arranged inclined feeding rollers in a figure-eight pattern, longitudinal propulsion and lateral stretching and flattening can be achieved simultaneously during the plastic bag conveying process, fundamentally eliminating the bag surface wrinkling problem easily caused by traditional single-roller feeding. Combined with ion air knife treatment for dust removal and static electricity elimination on the bag surface before sealing, the sealing area is ensured to be clean and flat, thereby significantly improving the sealing fusion quality and appearance neatness, and solving the technical problems of weak and unsightly seals caused by wrinkles in the prior art.

[0027] The feeding assembly automatically adjusts the clamping force according to the thickness of the plastic bag, preventing damage from excessive pressure or slippage from insufficient pressure. Each feeding roller is controlled by an independent driver, facilitating speed adjustment based on material characteristics and optimizing the flattening effect. The sealing assembly also adopts a compact design with spring buffer and a bottom-mounted driver, adapting to different bag types and sealing pressure requirements. The overall machine has a reasonable structure and flexible adjustments, making it widely applicable to the sealing of plastic bags of various materials, thicknesses, and specifications.

[0028] From feeding, conveying, flattening, dust removal to sealing, each functional module is arranged sequentially along the direction of plastic bag movement, ensuring a smooth and orderly process flow without the need for manual intervention in bag positioning and flattening. The equipment integrates a control cabinet and controller, enabling coordinated operation of all actuators. This significantly improves sealing efficiency while ensuring stable sealing quality. Operators only need to place and remove plastic bags, staying away from heat and moving parts, reducing labor intensity and operational risks, and meeting the automation and safety requirements of modern packaging production. Attached Figure Description

[0029] Figure 1 This is an isometric schematic diagram of a novel sealing device provided in this application; Figure 2 yes Figure 1 A schematic diagram of the structure after rotating by an angle; Figure 3 yes Figure 1 Top view; Figure 4 yes Figure 1 A structural diagram showing the structure after the loading platform has been concealed; Figure 5 yes Figure 4 Top view; Figure 6 yes Figure 4 A schematic diagram of the structure after rotating the first angle; Figure 7 yes Figure 4 A schematic diagram of the structure after rotating to the second angle.

[0030] In the picture: 1. Frame; 2. Sealing assembly; 3. Feeding assembly; 4. Dust removal assembly; 5. Loading platform; 21. Sealing top plate; 22. Sealing bottom plate; 23. Sealing base plate; 24. Sealing bracket; 25. Sealing actuator; 26. Sealing spring; 31. Feeding straight roller; 32. Feeding inclined roller; 33. Feeding platform; 34. Feeding base plate; 35. Feeding bracket; 36. First feeding driver; 37. Feeding spring; 38. Second feeding driver; 39. Guide component; 41. Ionizing air knife; 42. Dust removal bracket. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0032] This application discloses a novel sealing device.

[0033] refer to Figure 1 and Figure 2 A novel sealing device includes a frame 1, a sealing assembly 2, a feeding assembly 3, a dust removal assembly 4, and a loading platform 5. The sealing assembly 2, feeding assembly 3, and dust removal assembly 4 are all mounted on the frame 1. The sealing assembly 2 is used to seal plastic bags, the feeding assembly 3 is used to feed the plastic bags into the sealing assembly 2, and the dust removal assembly 4 is used to remove dust and static electricity from the plastic bags to be sealed.

[0034] refer to Figures 4 to 7The sealing assembly 2 includes a sealing upper plate 21, a sealing lower plate 22, a sealing base plate 23, a sealing bracket 24, a sealing driver 25, and a sealing spring 26. The sealing base plate 23 is fixedly mounted on the frame 1. The sealing driver 25 is fixed to the bottom surface of the sealing base plate 23. The sealing upper plate 21 is fixed to the top surface of the sealing base plate 23. The sealing bracket 24 is slidably mounted on the sealing base plate 23. The sealing driver 25 is fixed to the sealing base plate 23, and its output end is connected to the sealing bracket 24. The sealing bracket 24 reciprocates vertically with the aid of the sealing driver 25. The sealing lower plate 22 is fixed to the sealing bracket 24. The sealing upper plate 21 is located directly below the sealing lower plate 22. The sealing lower plate 22 reciprocates vertically relative to the sealing upper plate 21 with the aid of the sealing bracket 24, thereby allowing the sealing lower plate 22 and the sealing upper plate 21 to move closer or further apart. The sealing spring 26 is located between the sealing bracket 24 and the sealing base plate 23, and the sealing spring 26 is used to reset the sealing bracket 24.

[0035] When the upper sealing plate 21 and the lower sealing plate 22 approach each other, they will squeeze the opening of the plastic bag. Since the upper sealing plate 21 and the lower sealing plate 22 are equipped with heating elements, after the upper sealing plate 21 and the lower sealing plate 22 have finished squeezing the plastic bag, the heating elements will heat the opening of the plastic bag, thereby sealing the plastic bag.

[0036] To improve the overall compactness of the sealing equipment, the sealing actuator 25 is positioned below the sealing base plate 23. The sealing bracket 24 is divided into a lower sealing section and an upper sealing section. The lower sealing section of the sealing bracket 24 is located below the sealing actuator 25, and the upper sealing section is located above the lower sealing plate 22. A sealing connecting rod is provided between the lower and upper sealing sections of the sealing bracket 24. A sealing spring 26 is sleeved on the outside of the sealing connecting rod, with one end of the sealing spring 26 abutting between the upper sealing section of the sealing bracket 24 and the sealing base plate 23. This structure reduces the space occupied by the sealing assembly 2 and optimizes the layout.

[0037] refer to Figures 4 to 7The feeding assembly 3 includes a straight feeding roller 31, a skewed feeding roller 32, and a feeding platform 33. Both the straight feeding roller 31 and the skewed feeding roller 32 are rotatably mounted on the frame 1, while the feeding platform 33 is slidably mounted on the frame 1, located below the straight feeding roller 31 and the skewed feeding roller 32. The rotation axis of the straight feeding roller 31 is perpendicular to the direction of movement of the plastic bag to be sealed. There are two skewed feeding rollers 32 arranged in a figure-eight pattern, with their axes forming a certain angle with the direction of movement of the plastic bag. The rotation axes of the skewed feeding rollers 32 and the straight feeding roller 31 are parallel to the horizontal plane. Simultaneously, the outer edges of both the skewed feeding rollers 32 and the straight feeding roller 31 contact the surface of the plastic bag. The straight feeding roller 31 contacts the plastic bag first, followed by the skewed feeding roller 32. Because there are two feeding rollers 32 arranged in a figure-eight shape, and the rotation speed of the two feeding rollers 32 is set to be the same, it can be ensured that the component forces of the two feeding rollers 32 perpendicular to the direction of movement of the plastic bag are equal in magnitude and opposite in direction. Therefore, the plastic bag will not move in the direction perpendicular to the direction of movement. At the same time, it can also smooth out any wrinkles on the plastic bag, ensuring that the surface of the plastic bag is flat before sealing, thereby improving the sealing effect and appearance. The feeding platform 33 is slidably mounted on the frame 1. Therefore, the feeding platform 33 can transport the plastic bag to a certain extent, ensuring that the plastic bag will not fall during movement, and also improving the stability of the plastic bag during movement.

[0038] The feeding assembly 3 also includes a feeding base plate 34, a feeding bracket 35, a first feeding driver 36, and a feeding spring 37. The feeding base plate 34 is fixed to the frame 1. The feeding bracket 35 is slidably mounted on the feeding base plate 34 and reciprocates vertically. The first feeding driver 36 is mounted on the bottom surface of the feeding base plate 34, which helps optimize the overall spatial layout of the sealing equipment. The output end of the first feeding driver 36 is connected to the feeding bracket 35, and the first feeding driver 36 provides the power for the feeding bracket 35 to move relative to the feeding base plate 34. The feeding bracket 35 includes a lower feeding part and an upper feeding part. A feeding connecting rod connects the upper feeding part and the lower feeding part. The upper feeding part is located above the frame 1, and the lower feeding part is located below the frame 1. The feeding spring 37 is sleeved on the outside of the feeding spring 37. One end of the feeding spring 37 abuts against the upper feeding part, and the other end abuts against the feeding base plate 34. The feeding spring 37 is used to provide reset power for the reset of the feeding bracket 35. Meanwhile, both the feeding straight roller 31 and the feeding inclined roller 32 are rotatably mounted on the upper part of the feeding assembly. Through the vertical movement of the feeding bracket 35, the feeding assembly 3 can appropriately compress plastic bags of different thicknesses (i.e., the feeding assembly 3 can adapt to the longitudinal pushing and lateral flattening of plastic bags of different thicknesses). This ensures that the moving force provided by the feeding straight roller 31 to the plastic bag is neither too large nor too small, and the flattening force (or spreading force) provided by the feeding inclined roller 32 to the plastic bag is also neither too large nor too small. This is because excessive force may increase the risk of the plastic bag tearing, while insufficient force will result in insufficient power or flattening force on the plastic bag. Insufficient power will reduce the moving speed of the plastic bag, thereby reducing sealing efficiency; insufficient flattening force will prevent the surface of the plastic bag from being fully spread out.

[0039] To ensure that the lateral stretching forces acting on the plastic bag are equal and opposite, the feeding skew rollers 32 are designed with identical structures. Simultaneously, the contact area between the feeding skew rollers 32 and the plastic bag is guaranteed to be exactly the same, or the projected area of ​​the feeding skew rollers 32 on the plastic bag is guaranteed to be exactly the same. Furthermore, to reduce production costs and facilitate maintenance, the feeding straight rollers 31 and the feeding skew rollers 32 are designed with identical structures and have the same outer diameter.

[0040] In order to match the power provided by the feeding straight roller 31 and the feeding skew roller 32 to the plastic bag, a first driver, a second driver and a third driver are respectively set on the upper feeding part of the feeding bracket 35. The first driver is used to drive the feeding straight roller 31 to rotate, and the second driver and the third driver are used to drive the two feeding skew rollers 32 to rotate. The output speed of the first driver, the second driver and the third driver can be adjusted according to the actual parameters to achieve the matching effect.

[0041] To increase the friction between the feeding straight roller 31 and the feeding inclined roller 32 and the plastic bag, and to prevent slippage, a silicone sleeve or a rubber sleeve is fitted over the outside of the feeding straight roller 31 and the feeding inclined roller 32. The surface of the silicone sleeve or rubber sleeve has evenly distributed protrusions to increase the pushing force and stretching force on the plastic bag, and to prevent slippage between the plastic bag and the feeding straight roller 31 and the feeding inclined roller 32.

[0042] Since the feeding platform 33 needs to reciprocate linearly on the frame 1, and the direction of movement is consistent with the direction of movement of the plastic bag, the feeding assembly 3 also includes a second feeding driver 38 and a guide 39. The second feeding driver 38 is mounted on the frame 1, and its output end is connected to the feeding platform 33. The guide 39 is located between the feeding platform 33 and the frame 1, and is used to reduce the friction force on the feeding platform 33 and improve the stability of its movement. The guide 39 is typically selected as a combination of a guide rail and a slider. The guide rail is mounted on the frame 1, and the slider is connected to the bottom surface of the feeding platform 33.

[0043] The dust removal assembly 4 includes an ion air knife 41 and a dust removal bracket 42. The dust removal bracket 42 is mounted on the frame 1 and positioned between the sealing assembly 2 and the feeding assembly 3. More precisely, the dust removal bracket 42 is located in front of the upper sealing plate 21 or the lower sealing plate 22, meaning that the plastic bag to be sealed first passes through the dust removal area before entering the sealing area. The ion air knife 41 is mounted on the dust removal bracket 42, with its outlet facing the plastic bag on the frame 1, used to blow away dust from the surface of the plastic bag and eliminate static electricity on the plastic bag.

[0044] refer to Figure 1 and Figure 2 The loading platform 5 is located in front of and parallel to the frame 1. Multiple stacked plastic bags awaiting sealing are placed on the loading platform 5. The plastic bags on the loading platform 5 are manually fed into the feeding assembly 3, eliminating the need for further operator intervention. This improves operator safety and ensures efficient and effective sealing of the plastic bags. Once the plastic bags are sealed and conveyed out of the frame 1 by the feeding assembly 3, the operator removes the sealed bags and replaces them with new bags. This process is repeated until all plastic bags are sealed.

[0045] In addition, the novel sealing equipment provided in this application also includes a control cabinet, which is equipped with a controller. The controller is electrically connected to the first feeding driver 36, the second feeding driver 38, the first driver, the second driver, and the third driver.

[0046] The implementation principle of a novel sealing device according to an embodiment of this application is as follows: The operator places the plastic bag to be sealed on the loading platform 5 and manually or automatically guides its front end into the feeding assembly 3 area. After starting the device, the first feeding driver 36 pushes the feeding bracket 35 downward, so that the feeding straight roller 31 and the two feeding inclined rollers 32 moderately press the surface of the plastic bag; the feeding platform 33, driven by the second feeding driver 38, slides forward along the guide member 39, working in conjunction with the rotating feeding roller above to achieve stable conveying of the plastic bag.

[0047] During this process, the feeding straight roller 31 provides the main driving force along the conveying direction, driving the plastic bag forward; when the two feeding inclined rollers 32 arranged symmetrically in a figure-eight shape rotate, the surfaces of the two rollers in contact with the plastic bag generate lateral forces pointing to both sides. Since the two rollers rotate at the same speed and have a symmetrical structure, these two lateral forces are equal in magnitude and opposite in direction, thus stretching and smoothing out any wrinkles that may exist on the surface of the plastic bag to both sides without causing the plastic bag to shift laterally, ensuring that the sealing area is flat and wrinkle-free.

[0048] After being flattened, the plastic bag continues to be conveyed forward. When it passes under the ion air knife 41, the ionized airflow sprayed by the air knife removes dust from the surface of the bag and neutralizes static charge, preventing impurities or static electricity from affecting the subsequent sealing quality. Subsequently, the plastic bag is accurately delivered to the sealing station.

[0049] The sealing actuator 25 pushes the sealing bracket 24 downward, bringing the upper sealing plate 21 and the lower sealing plate 22, which is fixed on the bottom sealing plate 23, closer together to press the opening of the plastic bag tightly. Simultaneously, the heating elements built into the upper sealing plate 21 and / or the lower sealing plate 22 heat up, causing the plastic bag opening to fuse under pressure, thus completing the seal. The sealing spring 26 provides cushioning during the pressing process and assists the sealing bracket 24 in resetting after sealing, preparing for the next sealing operation.

[0050] Throughout the process, each drive is coordinated and controlled by the controller to achieve fully automated continuous operation of feeding, flattening, dust removal, and sealing. Through the above-mentioned collaborative working mechanism, this equipment not only efficiently seals plastic bags but also significantly improves the appearance flatness and sealing reliability of the sealed area, making it suitable for packaging plastic bags of various thicknesses and materials.

[0051] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A novel sealing device, characterized in that, include: Rack (1); A sealing assembly (2) is provided on the frame (1). The sealing assembly (2) includes an upper sealing plate (21) and a lower sealing plate (22). The upper sealing plate (21) and the lower sealing plate (22) are close to each other to achieve compression of the plastic bag. The lower sealing plate (22) and / or the upper sealing plate (21) are equipped with heating elements. A feeding assembly (3) is mounted on the frame (1). The feeding assembly (3) includes a feeding straight roller (31), a feeding inclined roller (32), and a feeding platform (33). The feeding straight roller (31) is rotatably mounted on the frame (1). The axis of the feeding straight roller (31) is perpendicular to the direction of movement of the plastic bag to be sealed. There are two feeding inclined rollers (32) arranged in a figure-eight shape. The feeding inclined rollers (32) are rotatably mounted on the frame (1). The axis of the feeding inclined rollers (32) forms an angle with the direction of movement of the plastic bag to be sealed. The outer edge of the feeding roller and the outer edge of the feeding inclined roller (32) are in contact with the outer surface of the plastic bag to be sealed. The feeding platform (33) is slidably mounted on the frame (1) and located below the feeding straight roller (31) and the feeding inclined roller (32). A dust removal assembly (4) is mounted on the frame (1). The dust removal assembly (4) includes an ion air knife (41), which is located above the feeding platform (33) and is used to remove dust and static electricity from the plastic bags to be sealed. The loading platform (5) is located on the side of the frame (1) and is used to hold plastic bags to be sealed.

2. The novel sealing device according to claim 1, characterized in that: The two feeding skew rollers (32) have the same structure and are symmetrically arranged, and the two feeding skew rollers (32) rotate at the same speed.

3. The novel sealing device according to claim 2, characterized in that: The axis of the feeding straight roller (31) and the axis of the feeding inclined roller (32) are located in the same horizontal plane, and the outer diameter of the feeding straight roller (31) and the outer diameter of the feeding inclined roller (32) are the same.

4. The novel sealing device according to claim 3, characterized in that: Both the feeding straight roller (31) and the feeding inclined roller (32) are covered with silicone sleeves or rubber sleeves.

5. A novel sealing device according to claim 4, characterized in that: The feeding assembly (3) further includes a feeding base plate (34), a feeding bracket (35), a first feeding driver (36), and a feeding spring (37). The feeding base plate (34) is mounted on the frame (1). The feeding bracket (35) is slidably mounted on the feeding base plate (34). The first feeding driver (36) is fixed on the feeding base plate (34) and its output end is connected to the feeding bracket (35). One end of the feeding spring (37) is connected to the feeding base plate (34), and the other end is connected to the feeding bracket (35). The feeding straight roller (31) and the feeding inclined roller (32) are both rotatably mounted on the feeding bracket (35).

6. A novel sealing device according to claim 5, characterized in that: The feeding assembly (3) further includes a first driver, a second driver and a third driver. The first driver is disposed on the feeding bracket (35) and its output end is connected to the roller shaft of the feeding straight roller (31). The second driver and the third driver are both disposed on the feeding bracket (35) and their output ends are respectively connected to the roller shafts of the two feeding inclined rollers (32).

7. A novel sealing device according to claim 6, characterized in that: The feeding assembly (3) further includes a second feeding driver (38) and a guide (39). The second feeding driver (38) is fixed on the frame (1) and its output end is connected to the feeding platform (33). The guide (39) is located on the feeding platform (33) and the frame (1) and is used to guide the movement of the feeding platform (33).

8. A novel sealing device according to any one of claims 1-7, characterized in that: The sealing assembly (2) further includes a sealing base plate (23), a sealing bracket (24), a sealing driver (25), and a sealing spring (26). The sealing base plate (23) is fixedly mounted on the frame (1). The sealing bracket (24) is slidably mounted on the sealing base plate (23). The sealing driver (25) is mounted on the sealing base plate (23) and its output end is connected to the sealing bracket (24). The sealing driver (25) is located below the sealing base plate (23). One end of the sealing spring (26) is connected to the sealing base plate (23), and the other end is connected to the sealing bracket (24). The sealing lower plate (22) is mounted on the sealing base plate (23), and the sealing upper plate (21) is mounted on the sealing bracket (24). The sealing lower plate (22) is located directly below the sealing upper plate (21).

9. A novel sealing device according to any one of claims 1-7, characterized in that: The dust removal assembly (4) also includes a dust removal bracket (42), which is mounted on the frame (1), and the ion air knife (41) is mounted on the dust removal bracket (42).

10. A novel sealing device according to any one of claims 1-7, characterized in that: Looking along the direction of movement of the plastic bag to be sealed, the feeding straight roller (31), the feeding inclined roller (32), the ion air knife (41) and the sealing upper plate (21) are arranged in sequence.

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