Food box sealing machine

Abstract

The invention belongs to the technical field of carton sealing machines, and particularly relates to a food carton sealing machine which comprises a rack and further comprises a workbench used for containing and guiding a carton to be sealed with glue; the adhesive sealing mechanism is arranged on the workbench and used for attaching an adhesive tape to the carton; the adjusting mechanism is arranged on the workbench, connected with the glue sealing mechanism and used for controlling the height of the glue sealing mechanism; the device further comprises a maintaining structure arranged in the adhesive sealing mechanism, and the maintaining structure makes contact with the adhesive tape and is used for maintaining the tension degree of the adhesive tape in the adhesive tape attaching process. The device has the beneficial effects that continuous and adjustable jacking force can be provided for the adhesive tape through the elastic jacking assembly in the maintaining structure, self-adaptive adjustment is carried out according to the tension change of the adhesive tape, and the problem of loose stacking or excessive stretching of the adhesive tape in the conveying and attaching process is avoided.

Description

Technical Field

[0001] This application belongs to the field of carton sealing machine technology, and particularly relates to a food carton sealing machine. Background Technology

[0002] In the food processing industry, carton sealing machines are a type of equipment used in the food packaging process. They are mainly used to seal boxes containing food to achieve airtight protection of the food. With the development of automation in the food industry, various fully automatic and semi-automatic carton sealing machines have been widely used in production lines. Their workflow usually includes automatically feeding the carton, folding the lid, and finally sealing the box opening with tape.

[0003] Existing food carton sealing machines typically consist of a tape conveying and pressing mechanism comprised of guide rollers, pressure rollers, and a cutter. The tape is guided by the guide rollers, pressed against the carton surface by the pressure rollers, and finally cut by the cutter. However, existing sealing machines have issues with tape tension control. They cannot adequately compact the tape at the moment of cutting. Excessive tension leads to overstretching, causing the tape to spring back after cutting, resulting in curling and wrinkles at the tail end. Insufficient tension causes the tape to slack, leading to stacking during pressing, resulting in loose adhesion and wrinkles. Improvements are needed to address these issues. Summary of the Invention

[0004] The purpose of this application is to provide a food sealing machine that can solve the above-mentioned problems.

[0005] The purpose of this application is to provide a food sealing machine, including a frame, and further comprising: A workbench used to place and guide cartons to be sealed; The sealing mechanism, located on the workbench, is used to apply tape to the cardboard box; An adjustment mechanism is set on the workbench, connected to the sealing mechanism, and used to control the height of the sealing mechanism; It also includes a retaining structure located within the sealing mechanism, which contacts the tape and is used to maintain the tension of the tape during the tape application process.

[0006] The aforementioned food sealing machine uses a frame that provides the installation foundation for the entire equipment. The worktable is used to place and guide the cartons to be sealed. The sealing mechanism is used to attach the tape to the cartons. The adjustment mechanism can adjust the height of the sealing mechanism to adapt to cartons of different heights and specifications. It maintains contact between the structure and the tape and continuously maintains the tension of the tape. This solves the problem of improper tape tension control in existing sealing machines, avoids the tape from becoming loose and stacked or overstretched during the application process, and reduces the phenomenon of loose tape adhesion and wrinkling.

[0007] In this application, the workbench includes multiple rollers mounted on a frame. These rollers are rotatably mounted. The adjustment mechanism consists of vertical stands mounted on both sides of the frame. Each stand comprises a rotating handle, a screw, a slider, and a sliding frame. Rotating the handle and the screw causes the slider to move up and down, which in turn moves the sliding frame. The sealing mechanism is mounted on the sliding frame, allowing for height adjustment to accommodate cartons of different heights. The adjustment mechanism also includes clamping seats on both sides of the workbench. Each clamping seat contains guide belts that contact the sides of the cartons. These guide belts are driven by a motor, and both clamping seats can move simultaneously inward and outward to clamp the cartons and drive them to move via the guide belts.

[0008] The rotatable roller table reduces friction during carton movement, ensuring smooth transport. The adjustment mechanism, through a combination of a handle, screw, slider, and sliding frame, allows for height adjustment of the sealing mechanism. This convenient and stable adjustment ensures the sealing mechanism aligns with the openings of cartons of varying heights. The clamping seats on both sides of the worktable can move inwards and outwards simultaneously, allowing for flexible adjustment of the clamping distance to accommodate cartons of different widths. This provides stable clamping, preventing lateral shifting and wobbling during sealing and ensuring straight tape application. The guide belt, driven by a motor, transports the cartons at a uniform and stable speed, ensuring consistent tape application and preventing uneven tape stretching and wrinkles caused by inconsistent carton transport speeds. The guide belt also contacts the sides of the carton, further assisting in positioning and reducing offset. Combined with the clamping action, this ensures stability during sealing, effectively preventing tape application problems caused by unstable carton transport and inaccurate positioning.

[0009] Furthermore, the sealing mechanism includes a housing and a component disposed within the housing; The guiding section includes a rubber wheel for placing the conveyor belt and multiple guide rollers for guiding the conveyor belt. The guide rollers are arranged sequentially along the conveyor belt conveying path to guide the conveyor belt. The pressing part includes a first pressing wheel for pressing the tape onto the carton, the first pressing wheel contacting the surface of the carton to press the tape firmly and adhere it to the carton; The cutting section includes a cutter for cutting the tape, which is located downstream of the first pressure roller and cuts the tape after it has been applied. The guiding part, the pressing part, and the cutting part cooperate with each other and form a linkage structure through the connecting rod assembly, and the structure is mounted on the pressing part.

[0010] The outer casing protects the guiding, pressing, and cutting sections inside the sealing mechanism, ensuring the safety of the internal structure. The rollers in the guiding section hold the tape, ensuring it doesn't detach during transport. Multiple guide rollers arranged sequentially along the tape's transport path precisely guide the tape, preventing deviation or twisting and ensuring it travels smoothly along the preset path. The first pressing roller directly contacts the carton surface, tightly pressing the tape against it as the carton moves, enhancing adhesion and preventing later detachment.

[0011] The cutter, installed downstream of the first clamping roller, cuts the tape promptly after application, preventing excess tape residue or untimely cutting that could lead to tape stacking and wrinkling, ensuring a clean and neat box seal. The guiding section, clamping section, and cutting section form a linked structure via a linkage assembly, ensuring coordinated and synchronized action of each component. This makes the tape feeding, clamping, and cutting process smooth and orderly, preventing uneven tape stretching, misalignment, and wrinkling caused by asynchronous actions, thus improving sealing efficiency and quality. The retaining structure, installed on the clamping section, maintains tape tension as it is applied to the carton, ensuring the tape enters the clamping stage flat, further improving tape adhesion smoothness.

[0012] Furthermore: the retaining structure is disposed on the conveyor belt path between the guide and the pressing part, and includes a positioning plate, a baffle and an elastic support assembly; The positioning plate has baffles on both sides of the front, and there is a gap between the baffles and the positioning plate for the tape to pass through. A vertical groove is provided in the center of the positioning plate, and an elastic support assembly is provided on the back of the positioning plate. One end of the elastic support assembly is provided with a contact block. The contact block passes through the vertical groove and protrudes from the front of the positioning plate. The contact block supports the non-adhesive surface of the tape, so that the tape remains taut during the conveying process.

[0013] The retaining structure, positioned between the guide section and the pressing section, allows for adjustment of the tape's tension before it enters the pressing stage. This ensures the tape enters the pressing and attaching process with optimal tension, preventing attachment defects caused by tape slack or excessive stretching. The positioning plate provides a mounting base for the baffles and elastic support components. The gap between the double-sided baffles and the positioning plate limits the tape's lateral movement, preventing it from veering off course during transport.

[0014] The vertical groove in the center of the positioning plate provides movement space for the contact block, allowing it to pass smoothly through the positioning plate and contact the tape. The contact block supports the non-adhesive side of the tape, effectively maintaining the tape's tension without causing it to stick or become damaged due to contact with the adhesive side. This prevents tape adhesion from affecting conveying and bonding. The elastic support component continuously supports the tape with the contact block, keeping the tape taut at all times. This prevents the tape from becoming loose and stacked, which would result in poor adhesion. It also prevents the tape from being overstretched, causing it to spring back and wrinkle after cutting, ensuring the tape remains flat and wrinkle-free during conveying.

[0015] Furthermore, the elastic support assembly includes: Mounting base, fixed to the back of the positioning plate; An elastic element, one end of which is connected to a mounting base and the other end of which is connected to a contact block; The elastic element provides continuous elastic support to the contact block, ensuring that the contact block remains in contact with the non-adhesive surface of the tape.

[0016] The mounting base is fixed to the back of the positioning plate, providing mounting support for the elastic element and ensuring its stable function, preventing the elastic element from loosening and causing unstable support force. The elastic element provides continuous elastic support force to the contact block, ensuring that the contact block always adheres tightly to the non-adhesive surface of the tape. Slight shaking or tension changes during tape conveying will not cause the contact block to separate from the tape, ensuring consistent tension.

[0017] Meanwhile, the elastic element has excellent elasticity and stretching properties, enabling it to adaptively adjust the supporting force according to changes in tape tension. When the tape tension is too high, the elastic element is compressed, buffering and releasing excess tension to prevent the tape from being overstretched and springing back and wrinkling after cutting. When the tape tension is too low, the elastic element resets, pushing the contact block to further support the tape, supplementing tension and preventing the tape from slack and stacking, which would result in poor adhesion. This adaptive adjustment method can control the tape tension, solving the problem of inaccurate tape tension control in carton sealing machines and ensuring that the tape remains flat and taut throughout the entire conveying process.

[0018] Furthermore, the linkage assembly includes: The first rod is located at one end of the outer casing, with one end hinged to the outer casing and the other end connected to the first pressure wheel; The second rod is located at the other end of the housing. One end of the rod is hinged to the housing, and the other end is equipped with a second pressure wheel for compacting the last part of the tape. A linkage component is installed between the first rod and the second rod to connect the first rod and the second rod. The second rod is connected to a return spring, and the other end of the return spring is installed inside the housing via a positioning bolt.

[0019] The linkage assembly enables coordinated and consistent action of all components, ensuring smooth and continuous tape feeding, pressing, and cutting processes, and avoiding tape adhesion defects caused by asynchronous actions of different components. The first rod is hinged at one end to the outer casing and connected to the first pressing roller at the other end, ensuring that the first pressing roller is always tightly pressed against the carton surface. It adaptively adjusts its angle according to the flatness of the carton surface, preventing unevenness that could lead to inadequate tape pressing and poor adhesion. The second rod is hinged at one end to the outer casing and fitted with a second pressing roller at the other end, providing secondary pressing of the tape at the end and the final section. This solves the problems of insufficient tape pressing, lifting, and wrinkling at the tail end of existing carton sealing machines, further enhancing the adhesion between the tape tail and the carton, and ensuring a tight overall tape adhesion.

[0020] Simultaneously, a linkage connects the first and second rods, synchronizing their movements. When the first pressure wheel moves and adjusts its position with the carton, the linkage drives the second pressure wheel to adjust synchronously, ensuring the tape is evenly pressed throughout the entire process and preventing localized inadequate pressing. A return spring connects to the second rod and is fixed inside the casing by a positioning bolt, providing continuous elastic pressure to the second pressure wheel. This ensures the second pressure wheel remains in contact with the carton surface. After sealing, the return spring resets the second rod, preparing it for the next sealing operation and preventing misalignment or wrinkling of the tape caused by the second rod's position, further improving sealing stability.

[0021] Furthermore, the linkage includes a linkage rod, the two ends of which are hinged to a first rod body and a second rod body respectively, and the linkage rod is composed of two spaced plates, with the first rod body and the second rod body located between the two plates.

[0022] The linkage rod is hinged at both ends to the first and second rods respectively, enabling linkage between the two rods and ensuring synchronized movement to prevent jamming. The linkage rod consists of two spaced-apart plates, with both the first and second rods positioned between them. This structure limits and protects the first and second rods, preventing lateral shifting or wobbling during linkage. It ensures the first and second pressure rollers move synchronously, guaranteeing even compression of the tape throughout and preventing issues like loose adhesion and wrinkling caused by inadequate localized compression. Furthermore, the two-plate structure enhances the linkage rod's structural strength and prevents contact with other components.

[0023] Furthermore, the cutting portion includes: The cutter arm is hinged to the housing of the sealing mechanism, and the cutter is mounted on the cutter arm; The cutter spring, connected between the cutter arm and the housing, provides a return force to the cutter arm, keeping the cutter pressed down when not in operation; The cutter arm has a contact end at the other end away from the cutter spring, which contacts the carton. After the carton contacts the contact end, the cutter arm is lifted. After the tape is applied, the contact end separates from the carton, and the cutter arm, under the action of the cutter spring, drives the cutter downward to cut the tape.

[0024] The cutter arm is hinged to the housing, allowing for flexible rotation to ensure the cutter can effectively cut the tape, preventing uneven cuts and excess tape residue caused by cutter misalignment. The cutter, mounted on the cutter arm, moves up and down with the arm's rotation, cutting the tape promptly after application to ensure neat packaging. A cutter spring provides a return force to the cutter arm, keeping the cutter pressed down when not in use, ensuring it is always ready to cut and preventing tape from being missed due to delayed cutter return.

[0025] In this application, the cutter arm is lifted when the contact end of the cutter arm contacts the carton, thus lifting the cutter and preventing it from prematurely cutting the tape during carton transport, ensuring that the tape adheres completely to the carton surface. After the tape is adhered and the contact end separates from the carton, the cutter arm, under the elastic force of the cutter spring, drives the cutter downward to quickly cut the tape. The cutting action is precise and rapid, preventing the tape from being overstretched and wrinkled due to springback. At the same time, it ensures a flat cut surface, preventing the tape tail from curling up and not adhering tightly due to uneven cutting. This solves the tape adhesion defects caused by inaccurate cutter action and untimely cutting in existing carton sealing machines, further improving the sealing quality.

[0026] Furthermore, the pressing part also includes a brush disposed at the bottom of the outer shell. The brush is fixedly installed on the outer shell of the sealing mechanism, and the bristles of the brush are in contact with the tape attached to the surface of the carton. After the tape is pressed and cut, the brush presses and compacts the tape three times as the carton moves.

[0027] The brush is fixedly installed at the bottom of the casing, continuously providing a compacting effect. It avoids direct contact between the brush bristles and the tape adhered to the carton surface, ensuring tape compaction without damaging either the tape or the carton. This prevents tape breakage or wrinkling caused by overly rigid compaction components. After the tape is pressed and cut, the brush, moving with the carton, applies three more pressure strokes to the tape, further eliminating gaps between the tape and the carton. This solves the problem of insufficient tape compaction and gaps in existing carton sealing machines, resulting in loose adhesion and enhancing the bond between the tape and the carton, preventing tape detachment later.

[0028] The third contact and compaction gradually removes air between the tape and the carton, ensuring that the tape adheres tightly to the carton surface throughout the process. It also smooths out any slight wrinkles that may appear on the tape surface, further improving the flatness of the tape adhesion and solving the problem of tape wrinkling.

[0029] The beneficial effects of this application are: 1. By maintaining the elastic support components in the structure, a continuous and adjustable support force can be provided to the tape, which can be adaptively adjusted according to the changes in tape tension, avoiding the problems of loose stacking or excessive stretching of the tape during the conveying and bonding process; 2. By rotating the handle in conjunction with the screw, slider and other structures, the height of the sealing mechanism can be conveniently and stably adjusted to adapt to cartons of different heights. At the same time, the combination of the clamping seat and the guide belt can achieve stable clamping and uniform conveying of the cartons, avoiding carton deviation and uneven conveying. 3. The linkage assembly ensures that the guiding part, pressing part and cutting part move in unison, ensuring that the tape conveying, pressing and cutting process is smooth and orderly. At the same time, the multiple compaction effects of the second pressing wheel and the brush further improve the flatness of the tape adhesion and prevent the tape from lifting or wrinkling. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the adhesive to be sealed according to the present invention; Figure 3 This is a schematic diagram of the sealing process of the present invention; Figure 4 A schematic diagram of the sealing mechanism of this invention; Figure 5 It is a picture Figure 4 A magnified view of A in the middle.

[0031] The reference numerals in the figure are as follows: 100, workbench; 200, sealing mechanism; 210, outer shell; 220, guide part; 221, rubber wheel; 222, guide roller; 230, pressing part; 231, first pressing wheel; 232, brush; 240, cutting part; 241, cutter; 242, cutter arm; 243, cutter spring; 244, contact end; 250, linkage assembly; 251, first rod; 252, second rod; 253, second pressing wheel; 254, linkage rod; 255, return spring; 300, adjusting mechanism; 400, retaining structure; 410, positioning plate; 420, baffle; 430, elastic support assembly; 431, mounting base; 432, elastic element; 440, vertical groove; 450, contact block. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0033] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0034] The food sealing machine provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios. Example 1:

[0035] like Figures 1 to 4 As shown in the figure, this application provides a food sealing machine, including a frame, and further comprising: Workbench 100 is used to place and guide cartons to be sealed. A sealing mechanism 200 is set on a workbench 100 and is used to apply tape to a carton. An adjustment mechanism 300 is mounted on the workbench 100, connected to the sealing mechanism 200, and used to control the height of the sealing mechanism 200. It also includes a retaining structure 400 disposed within the sealing mechanism 200, which contacts the tape and is used to maintain the tension of the tape during tape application.

[0036] In some embodiments of this application, such as Figure 1 As shown, the above-mentioned food sealing machine uses a frame that provides the installation foundation for the entire equipment. The worktable 100 is used to place and guide the cartons to be sealed. The sealing mechanism 200 is used to attach the tape to the cartons. The adjusting mechanism 300 can adjust the height of the sealing mechanism 200 to adapt to cartons of different heights. The structure 400 is kept in contact with the tape and maintains the tape tension. This solves the problem of improper tape tension control in existing sealing machines, avoids the tape from becoming loose and stacked or overstretched during the application process, and reduces the phenomenon of loose tape adhesion and wrinkling.

[0037] In this application, the workbench 100 includes multiple rollers mounted on a frame. The rollers are rotatably mounted. The adjustment mechanism 300 consists of vertical stands mounted on both sides of the frame. Each stand comprises a rotating handle, a screw, a slider, and a sliding frame. By rotating the handle, the slider moves up and down due to the rotation of the screw, thereby moving the sliding frame. The sealing mechanism 200 is mounted on the sliding frame, thereby adjusting its height to accommodate cartons of different heights. The adjustment mechanism 300 also includes clamping seats on both sides of the workbench 100. Guide belts that contact the sides of the cartons are installed within the clamping seats. The guide belts are driven to rotate by a motor, and both clamping seats can move simultaneously inward and outward, thus clamping the cartons and driving them to move via the guide belts.

[0038] The rotatable roller table 100 reduces friction during carton movement, ensuring smooth transport. The adjustment mechanism 300, through a combination of a rotating handle, screw, slider, and sliding frame, adjusts the height of the sealing mechanism 200. This provides convenient and stable operation, ensuring the sealing mechanism 200 aligns with the openings of cartons of different heights. The clamping seats on both sides of the worktable 100 can move inward and outward simultaneously, allowing for flexible adjustment of the clamping distance based on carton widths. This ensures stable clamping of the carton, preventing lateral shifting or wobbling during sealing and guaranteeing the straightness of the tape application. The guide belt is driven by a motor to rotate, which can drive the carton to be transported at a uniform and stable speed, so that the tape application process is carried out at a uniform speed. This avoids uneven tape stretching and wrinkles caused by uneven carton transport speed. At the same time, the guide belt contacts the two sides of the carton to further assist in the positioning of the carton and reduce carton deviation. Together with the clamping action of the clamping seat, it ensures the stability of the carton during the sealing process and effectively avoids problems with tape application caused by unstable carton transport and inaccurate positioning of the carton sealing machine. Example 2:

[0039] This application provides a food sealing machine, which, in addition to the above-mentioned technical features, also includes the following technical features.

[0040] like Figures 2 to 4 As shown, the sealing mechanism 200 includes a housing 210 and a component disposed within the housing 210; The guide section 220 includes a rubber wheel 221 for placing the tape and a plurality of guide rollers 222 for guiding the tape. The guide rollers 222 are arranged sequentially along the tape conveying path to guide the tape. The pressing part 230 includes a first pressing wheel 231 for pressing the tape onto the carton. The first pressing wheel 231 contacts the surface of the carton and presses the tape firmly onto the carton. The cutting section 240 includes a cutter 241 for cutting the tape. The cutter 241 is located downstream of the first pressure roller 231 and cuts the tape after it has been applied. The guide part 220, the pressing part 230 and the cutting part 240 cooperate with each other and form a linkage structure through the linkage assembly 250, and the retaining structure 400 is installed on the pressing part 230.

[0041] In this embodiment, the outer shell 210 protects the guide section 220, pressing section 230, and cutting section 240 inside the sealing mechanism 200, ensuring the safety of the internal structure. The rubber roller 221 in the guide section 220 holds the tape, ensuring it does not detach during transport. Multiple guide rollers 222 arranged sequentially along the tape transport path precisely guide the tape, preventing it from deviating or twisting during transport and ensuring it is always transported smoothly along the preset path. The first pressing roller 231 directly contacts the surface of the carton, pressing the tape tightly against the carton surface as it moves, enhancing the adhesion between the tape and the carton and preventing the tape from detaching later.

[0042] The cutter 241 is installed downstream of the first pressure roller 231, and can cut the tape promptly after it is applied, avoiding excess tape residue or tape stacking and wrinkling caused by untimely cutting, thus ensuring the neatness of the sealed box. The guide part 220, the pressure part 230, and the cutter 240 form a linkage structure through the linkage assembly 250, so that the actions of each component are coordinated and synchronized, making the tape feeding, pressure, and cutting process smooth and orderly, avoiding problems such as uneven tape stretching, misalignment, and wrinkling caused by asynchronous actions of each component, thus improving sealing efficiency and sealing quality. The retaining structure 400 is installed on the pressure part 230, and can continuously maintain the tension of the tape as it is about to be applied to the carton, ensuring that the tape enters the pressure stage in a flat state, further improving the flatness of tape application. Example 3:

[0043] This application provides a food sealing machine, which, in addition to the above-mentioned technical features, also includes the following technical features.

[0044] like Figures 2 to 5 As shown, the retaining structure 400 is disposed on the tape conveying path between the guide part 220 and the pressing part 230, and includes a positioning plate 410, a baffle 420 and an elastic support assembly 430. The positioning plate 410 has baffles 420 on both sides of its front side, and there is a gap between the baffles 420 and the positioning plate 410 for the tape to pass through. The positioning plate 410 has a vertical groove 440 in the center. The elastic support assembly 430 is located on the back of the positioning plate 410. One end of the elastic support assembly 430 is provided with a contact block 450. The contact block 450 passes through the vertical groove 440 and protrudes from the front of the positioning plate 410. The contact block 450 supports the non-adhesive surface of the tape, so that the tape remains taut during the conveying process.

[0045] In this embodiment, the retaining structure 400 is positioned between the guide portion 220 and the pressing portion 230, allowing adjustment of the tape's tension before it enters the pressing stage. This ensures the tape enters the pressing and attaching process with optimal tension, preventing attachment defects caused by tape slack or excessive stretching. The positioning plate 410 provides a mounting base for the baffle 420 and the elastic support assembly 430. The gap between the double-sided baffles 420 and the positioning plate 410 limits the tape's lateral movement, preventing it from veering off course during transport.

[0046] The vertical groove 440 in the center of the positioning plate 410 provides movement space for the contact block 450, allowing the contact block 450 to pass smoothly through the positioning plate 410 and contact the tape. The contact block 450 supports the non-adhesive surface of the tape, effectively maintaining the tape's tension without causing the tape to stick or become damaged due to contact with the adhesive surface, thus preventing tape adhesion from affecting conveying and bonding effects. The elastic support component 430 drives the contact block 450 to continuously support the tape, keeping the tape taut at all times. This prevents the tape from becoming loose and stacked, resulting in poor adhesion, and also prevents the tape from being overstretched, causing it to spring back and wrinkle after cutting, ensuring that the tape is flat and wrinkle-free during conveying.

[0047] Furthermore, the resilient support assembly 430 includes: Mounting base 431 is fixed to the back of positioning plate 410; The elastic element 432 has one end connected to the mounting base 431 and the other end connected to the contact block 450; The elastic element 432 provides a continuous elastic support force to the contact block 450, so that the contact block 450 always remains in contact with the non-adhesive surface of the tape.

[0048] Mounting base 431 is fixed to the back of positioning plate 410, providing mounting support for elastic element 432, ensuring that elastic element 432 can function stably, and preventing loosening of elastic element 432 that would lead to unstable supporting force. Elastic element 432 provides continuous elastic supporting force to contact block 450, ensuring that contact block 450 always fits tightly against the non-adhesive surface of the tape, and will not separate from the tape due to slight shaking or tension changes during tape conveying, thus ensuring the continuity of tension effect.

[0049] Meanwhile, the elastic element 432 has excellent elasticity and extensibility, enabling it to adaptively adjust the supporting force according to changes in tape tension. When the tape tension is too high, the elastic element 432 is compressed, buffering and releasing excess tension to prevent the tape from being overstretched and causing it to spring back and wrinkle after cutting. When the tape tension is too low, the elastic element 432 resets, pushing the contact block 450 to further support the tape, supplementing the tension and preventing the tape from slack and stacking, resulting in poor adhesion. This adaptive adjustment method can control the tape tension, solving the problem of inaccurate tape tension control in carton sealing machines and ensuring that the tape remains flat and taut throughout the entire conveying process. Example 4:

[0050] This application provides a food sealing machine, which, in addition to the above-mentioned technical features, also includes the following technical features.

[0051] like Figures 2 to 4 As shown, the linkage assembly 250 includes: The first rod 251 is disposed at one end of the outer shell 210, with one end hinged to the outer shell 210 and the other end connected to the first pressure wheel 231; The second rod 252 is located at the other end of the housing 210. One end of the rod is hinged to the housing 210, and the other end is equipped with a second pressure wheel 253 for compacting the last part of the tape. A linkage component is disposed between the first rod 251 and the second rod 252 to connect the first rod 251 and the second rod 252; The second rod 252 is connected to a return spring 255, and the other end of the return spring 255 is installed in the housing 210 by a positioning bolt.

[0052] In this embodiment, the linkage assembly 250 enables coordinated and consistent operation of all components, ensuring smooth and continuous tape feeding, pressing, and cutting processes, and avoiding tape adhesion defects caused by asynchronous operation of components. The first rod 251 is hinged at one end to the outer shell 210 and connected to the first pressing wheel 231 at the other end, ensuring that the first pressing wheel 231 is always tightly fitted to the carton surface. Its angle is adaptively adjusted according to the flatness of the carton surface, preventing unevenness from causing inadequate localized tape pressing and poor adhesion. The second rod 252 is hinged at one end to the outer shell 210 and fitted with a second pressing wheel 253 at the other end, enabling secondary pressing of the tape at the end and the final portion, solving the problems of insufficient tape pressing, easy lifting, and wrinkling at the tail of the tape in existing carton sealing machines, further enhancing the adhesion between the tape tail and the carton, and ensuring overall tight tape adhesion.

[0053] Simultaneously, the linkage connects the first rod 251 and the second rod 252, synchronizing their movements. When the first pressure roller 231 moves and adjusts its position with the carton, the linkage drives the second pressure roller 253 to adjust synchronously, ensuring that the tape is evenly pressed throughout the entire process and avoiding localized inadequate pressing. The return spring 255 connects to the second rod 252 and is fixed inside the housing 210 by a positioning bolt. It provides continuous elastic pressing force to the second pressure roller 253, ensuring that the second pressure roller 253 always adheres to the carton surface. After the sealing operation is completed, it drives the second rod 252 to return to its original position, preparing for the next sealing operation and preventing the second rod 252 from shifting position, which could cause misalignment or wrinkling of the tape, further improving the stability of the sealing process.

[0054] Furthermore, the linkage includes a linkage rod 254, the two ends of which are hinged to the first rod body 251 and the second rod body 252 respectively, and the linkage rod 254 is composed of two spaced plates, with the first rod body 251 and the second rod body 252 both located between the two plates.

[0055] The linkage rod 254 is hinged at both ends to the first rod 251 and the second rod 252, respectively, enabling linkage between the first rod 251 and the second rod 252 and ensuring synchronized movement to prevent jamming. The linkage rod 254 consists of two spaced-apart plates, with both the first rod 251 and the second rod 252 positioned between them. This structure limits and protects the first and second rods 251 and 252, preventing them from shifting or wobbling during linkage. This ensures that the movements of the first and second pressure rollers 231 and 253 remain synchronized, guaranteeing uniform compression of the tape throughout and preventing issues like incomplete adhesion and wrinkling caused by localized insufficient compression. Furthermore, the two-plate structure enhances the structural strength of the linkage rod 254 and prevents contact with other components. Example 5:

[0056] This application provides a food sealing machine, which, in addition to the above-mentioned technical features, also includes the following technical features.

[0057] like Figures 2 to 4 As shown, the cutting portion 240 includes: The cutter arm 242 is hinged to the housing 210 of the sealing mechanism 200, and the cutter 241 is mounted on the cutter arm 242; The cutter spring 243 is connected between the cutter arm 242 and the housing 210, and is used to provide a return spring force for the cutter arm 242 so that the cutter 241 remains pressed down when it is not working. The cutter arm 242 has a contact end 244 at the other end away from the cutter spring 243, which contacts the carton. After the carton contacts the contact end 244, the cutter arm 242 is lifted. After the tape is applied, the contact end 244 separates from the carton. Under the action of the cutter spring 243, the cutter arm 242 drives the cutter 241 to move downward and cut the tape.

[0058] In this embodiment, the cutter arm 242 is hinged to the housing 210 and can rotate flexibly, ensuring that the cutter 241 can perform the tape cutting action and preventing uneven tape cutting and excess tape residue caused by the positional deviation of the cutter 241. The cutter 241 is mounted on the cutter arm 242 and moves up and down with the rotation of the cutter arm 242, enabling timely cutting after the tape is applied, ensuring the neatness of the sealed box. The cutter spring 243 provides a return force to the cutter arm 242, keeping the cutter 241 pressed down when not in operation, ensuring that the cutter 241 is always in a ready-to-cut state, and preventing the tape from not being cut in time due to the cutter 241 not returning in time.

[0059] In this application, when the contact end 244 on the cutter arm 242 contacts the carton, the cutter arm 242 is lifted, thereby lifting the cutter 241. This prevents the cutter 241 from prematurely cutting the tape during carton conveying, ensuring that the tape is completely adhered to the carton surface. After the tape is adhered and the contact end 244 separates from the carton, the cutter arm 242, under the elastic force of the cutter spring 243, drives the cutter 241 downward to quickly cut the tape. The cutting action is precise and rapid, preventing the tape from being overstretched and causing it to spring back and wrinkle. At the same time, it ensures a flat cut surface, preventing the tape tail from curling up and not adhering tightly due to uneven cutting. This solves the tape adhesion defects caused by the inaccurate action and untimely cutting of the cutter 241 in existing carton sealing machines, further improving the sealing quality. Example 6:

[0060] This application provides a food sealing machine, which, in addition to the above-mentioned technical features, also includes the following technical features.

[0061] like Figures 2 to 4 As shown, the pressing part 230 also includes a brush 232 disposed at the bottom of the housing 210. The brush 232 is fixedly installed on the housing 210 of the sealing mechanism 200, and the bristles of the brush 232 are in contact with the tape attached to the surface of the carton. In this process, after the tape is pressed and cut, the brush 232 presses the tape against it three times as the carton moves.

[0062] In this embodiment, the brush 232 is fixedly installed at the bottom of the housing 210, continuously providing a compaction effect. This prevents the brush bristles from contacting the tape adhered to the carton surface, ensuring tape compaction without damaging the tape or carton. It also avoids tape breakage or wrinkling due to excessive stiffness of the compaction components. After the tape is pressed and cut, the brush 232 performs three abutments and compactions on the tape as the carton moves, further eliminating gaps between the tape and the carton. This solves the problem of insufficient tape compaction and gaps in existing carton sealing machines, resulting in loose adhesion, enhancing the adhesion between the tape and the carton, and preventing the tape from detaching later.

[0063] The third contact and compaction gradually removes air between the tape and the carton, ensuring that the tape adheres tightly to the carton surface throughout the process. It also smooths out any slight wrinkles that may appear on the tape surface, further improving the flatness of the tape adhesion and solving the problem of tape wrinkling.

[0064] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0065] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A food sealing machine, comprising a frame, characterized in that: Also includes: Workbench (100) for placing and guiding cartons to be sealed; A sealing mechanism (200) is provided on a workbench (100) for applying tape to a carton; An adjustment mechanism (300) is provided on the workbench (100), connected to the sealing mechanism (200), and used to control the height of the sealing mechanism (200); It also includes a retaining structure (400) disposed within the sealing mechanism (200), which contacts the tape and is used to maintain the tension of the tape during tape application.

2. The food sealing machine according to claim 1, characterized in that: The sealing mechanism (200) includes a housing (210) and a component disposed within the housing (210); The guide section (220) includes a rubber wheel (221) for placing the conveyor belt and a plurality of guide rollers (222) for guiding the conveyor belt. The guide rollers (222) are arranged sequentially along the conveyor belt conveying path to guide the conveyor belt. The pressing part (230) includes a first pressing wheel (231) for pressing the tape onto the carton. The first pressing wheel (231) contacts the surface of the carton and presses the tape firmly and adheres it to the carton. The cutting section (240) includes a cutter (241) for cutting the tape. The cutter (241) is located downstream of the first pressure roller (231) and cuts the tape after it has been applied. The guide part (220), the pressing part (230) and the cutting part (240) cooperate with each other and form a linkage structure through the linkage assembly (250), and the retaining structure (400) is installed on the pressing part (230).

3. A food sealing machine according to claim 2, characterized in that: The retaining structure (400) is disposed on the conveyor belt path between the guide (220) and the clamping part (230), and includes a positioning plate (410), a baffle (420) and an elastic support assembly (430); The positioning plate (410) has baffles (420) on both sides of its front side, and a gap is left between the baffles (420) and the positioning plate (410) for the tape to pass through. A vertical groove (440) is provided in the center of the positioning plate (410). An elastic support assembly (430) is provided on the back of the positioning plate (410). A contact block (450) is provided at one end of the elastic support assembly (430). The contact block (450) passes through the vertical groove (440) and protrudes from the front of the positioning plate (410). The contact block (450) supports the non-adhesive surface of the tape, so that the tape remains taut during the conveying process.

4. A food sealing machine according to claim 3, characterized in that: The elastic support assembly (430) includes: Mounting base (431) is fixed to the back of positioning plate (410); An elastic element (432) has one end connected to a mounting base (431) and the other end connected to a contact block (450); The elastic element (432) provides a continuous elastic support force to the contact block (450), so that the contact block (450) always remains in contact with the non-adhesive surface of the tape.

5. A food sealing machine according to claim 4, characterized in that: The linkage assembly (250) includes: The first rod (251) is disposed at one end of the outer shell (210), with one end hinged to the outer shell (210) and the other end connected to the first pressure wheel (231); The second rod (252) is located at the other end of the housing (210), with one end hinged to the housing (210) and the other end equipped with a second pressure wheel (253) for compacting the last part of the tape. A linkage component is disposed between the first rod (251) and the second rod (252) for connecting the first rod (251) and the second rod (252); The second rod (252) is connected to a return spring (255), and the other end of the return spring (255) is installed inside the housing (210) by a positioning bolt.

6. A food sealing machine according to claim 5, characterized in that: The linkage component includes a linkage rod (254), the two ends of which are hinged to a first rod body (251) and a second rod body (252) respectively. The linkage rod (254) is composed of two spaced plates, with the first rod body (251) and the second rod body (252) located between the two plates.

7. A food sealing machine according to claim 6, characterized in that: The cutting portion (240) includes: The cutter arm (242) is hinged to the housing (210) of the sealing mechanism (200), and the cutter (241) is mounted on the cutter arm (242); A cutter spring (243) is connected between the cutter arm (242) and the housing (210) to provide a return force to the cutter arm (242) so that the cutter (241) remains pressed down when not in operation; The cutter arm (242) is provided with a contact end (244) at the other end away from the cutter spring (243) to contact the carton. After the carton contacts the contact end (244), the cutter arm (242) is lifted. After the tape is applied, the contact end (244) separates from the carton. Under the action of the cutter spring (243), the cutter arm (242) drives the cutter (241) to move downward to cut the tape.

8. A food sealing machine according to claim 7, characterized in that: The pressing part (230) also includes a brush (232) disposed at the bottom of the outer shell (210). The brush (232) is fixedly installed on the outer shell (210) of the sealing mechanism (200), and the bristles of the brush (232) are in contact with the tape attached to the surface of the carton. In this process, after the tape is pressed and cut, the brush (232) presses the tape against the carton three times as the carton moves.

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