A triangular jelly double-sealing packaging machine and packaging method with rotary heat sealing

Abstract

This invention relates to the field of triangular jelly packaging machine technology, specifically to a triangular jelly double-sealing packaging machine and method with rotary heat sealing, comprising a heat sealing unit and a rotating unit; the heat sealing unit includes two heat sealing components arranged vertically, with the triangular jelly outer packaging passing through the two heat sealing components sequentially from top to bottom. The heat sealing patterns formed by the two components after heat sealing are different, and these patterns overlap to form the seal pattern at the outer opening of the heat-sealed triangular jelly packaging. The lines in the two heat sealing patterns do not overlap. This invention avoids the defect of insufficient heat sealing at the corners of the triangular jelly seal and reduces the probability of local cracking at the seal.

Description

Technical Field

[0001] This invention relates to the field of triangular jelly packaging machine technology, specifically to a triangular jelly double-sealing packaging machine and packaging method with rotary heat sealing. Background Technology

[0002] When packaging triangular jelly, heat sealing is mainly used. During the heat sealing process, the heat sealing knife needs to come into contact with the outer packaging of the triangular jelly and squeeze the outer packaging to heat seal it.

[0003] Chinese Patent Publication No. CN218662504U discloses a rotary heat-sealing mechanism for an automatic triangular jelly packaging machine, including a rotating frame and a lifting support frame fixed in the machine body. The lifting support frame is provided with a support plate for supporting the rotating frame. A sliding plate is provided on the side of the support plate facing the machine body. The support plate is provided with a through hole. A hollow rotating shaft matching the through hole is provided in the middle of the rotating frame. The rotating shaft is embedded in the through hole and enables the rotating frame to move in a circle along the axis of the through hole. A push connecting piece is fixed on the outer surface of the rotating shaft. A push cylinder is provided below the lifting support frame and fixed on the lifting support frame. The push rod of the push cylinder is connected and hinged to the push connecting piece and pushes the rotating frame to rotate back and forth.

[0004] The above-mentioned solution uses a single set of heat-sealing blades to heat-seal the outer packaging bag of the triangular jelly. The same outer packaging bag needs to be heat-sealed on both the top and bottom sides, with the heat-sealing directions perpendicular to each other. Because the top and bottom ends of the triangular jelly outer packaging are only subjected to a single heat seal, the seal is prone to insecure sealing. Furthermore, during the heat-sealing of the triangular jelly outer packaging bag, the outer packaging strap also needs to be pulled. To simplify the structure, the existing solution uses a single set of heat-sealing blades to lower the triangular jelly outer packaging during heat sealing. This causes the heat-sealed triangular jelly outer packaging bag to soften during the pulling process. Under stress, the seal of the triangular jelly outer packaging bag may stretch or break. This not only results in an insecure seal but also insufficient descent of the triangular jelly outer packaging bag, ultimately leading to inconsistent sizes of the produced triangular jelly outer packaging bags and a tendency for leakage. Summary of the Invention

[0005] To address the aforementioned issues, a rotary heat-sealing triangular jelly double-sealing packaging machine and method are provided. This method utilizes two sets of heat-sealing components, upper and lower, employing two non-overlapping heat-sealing patterns to form the final sealing pattern. The lines in these two patterns do not overlap, solving the problem of weak sealing caused by traditional single-stage heat sealing with a single heat-sealing blade. The upper heat-sealing component performs two preliminary heat seals by rotating 90 degrees, followed by a second heat seal from the lower component. The non-overlapping superposition of the two patterns significantly increases the contact area and friction between the heat-sealing layers, strengthening the interlayer bond. This avoids insufficient heat sealing at the corners of the triangular jelly and reduces the probability of localized cracking.

[0006] To address the problems of existing technologies, this invention provides a triangular jelly double-sealing packaging machine with rotary heat sealing, comprising a heat sealing unit and a rotating unit; the heat sealing unit includes heat sealing components, and two heat sealing components are provided, arranged vertically, with the triangular jelly outer packaging passing through the two heat sealing components sequentially from top to bottom, the heat sealing patterns formed by the two heat sealing components after heat sealing are different, and the two heat sealing patterns overlap to form the pattern at the seal of the triangular jelly outer packaging after heat sealing, and the lines in the two heat sealing patterns do not overlap.

[0007] Preferably, the textures formed after heat sealing of the two heat-sealing components are a mesh pattern and a straight plain pattern, respectively.

[0008] Preferably, the packaging machine further includes a connecting frame and a buffer; the connecting frame is used to support the heat sealing unit, and the rotating unit drives the heat sealing unit to swing on the horizontal plane through the connecting frame; two buffers are provided, and the two buffers are respectively arranged on both sides of the connecting frame along the swing direction of the connecting frame.

[0009] Preferably, a longitudinal traction mechanism is provided at the upper part of the heat sealing unit. The longitudinal traction mechanism includes a clamping mechanism that can hold the triangular jelly outer packaging bag and a lifting unit that can drive the clamping mechanism to move in the vertical direction.

[0010] Preferably, the clamping mechanism includes two grippers arranged in a horizontal direction, and a limiting frame is provided above the clamping mechanism. The limiting frame has two crossbars that can limit the triangular jelly outer packaging bag. The arrangement direction of the two crossbars is parallel to the horizontal plane and perpendicular to the arrangement direction of the two grippers.

[0011] Preferably, a cutting mechanism is provided below the heat-sealing unit to cut the triangular jelly after heat sealing, and the cutting mechanism rotates synchronously with the heat-sealing unit.

[0012] Preferably, a longitudinal adjustment mechanism is provided on one side of the slitting mechanism. The longitudinal adjustment mechanism is used to drive the slitting mechanism to move in the vertical direction. The distance between the slitting mechanism and the lower heat sealing component is called the first gap. The distance of a single descent of the clamping mechanism is called the second gap. The first gap and the second gap are equal.

[0013] Preferably, the slitting mechanism includes a slitting blade and an abutment plate; the slitting blade is horizontally moved and positioned below the heat-sealing unit, and both the upper and lower end faces of the slitting blade are provided with pointed protrusions; the abutment plate is positioned on one side of the slitting blade head, and the heat-sealed triangular jelly outer packaging bag is located between the slitting blade and the abutment plate, and a slitting groove is provided on the abutment plate, which can be inserted into the slitting groove when the slitting blade moves.

[0014] Preferably, a discharge pipe is provided on the side of the abutment plate away from the slitting blade, and the discharge pipe is connected to the slitting groove.

[0015] This invention also relates to a method for double-sealing packaging of triangular jelly with rotary heat sealing, using a triangular jelly double-sealing packaging machine with rotary heat sealing, the specific steps of which are as follows:

[0016] S1. Adjust the descent traction and cutting amount of the outer packaging bag of the triangular jelly according to the required size of the triangular jelly to be produced, and then start the packaging machine;

[0017] S2. The triangular jelly outer packaging bag enters the heat sealing unit for heat sealing. The heat sealing component located on the upper side first performs two preliminary heat seals on the triangular jelly outer packaging bag. The extension directions of the two preliminary heat seals are perpendicular to each other, and the triangular jelly outer packaging bag is isolated into a separate package through preliminary heat sealing. The upper and lower ends of the separate package have heat sealing textures.

[0018] S3. After being heat-sealed by the upper heat-sealing component, the triangular jelly outer packaging bag descends to the position of the lower heat-sealing component and stops. It is then heat-sealed a second time by the lower heat-sealing component to form a heat-sealing pattern that combines mesh and straight plain textures.

[0019] S4. Cut the triangular jelly outer packaging bag after the second heat sealing.

[0020] The advantages of this invention compared to the prior art are:

[0021] 1. This invention uses two sets of heat-sealing components, one upper and one lower, employing two non-overlapping heat-sealing patterns to form the final sealing pattern. The lines in these two patterns do not overlap. This solves the problem of weak sealing caused by traditional single-set heat-sealing blades and single-pass heat sealing. The upper heat-sealing component first completes two preliminary heat seals by rotating 90 degrees, and then the lower heat-sealing component performs a second heat seal. The non-overlapping superposition of the two patterns significantly increases the contact area and friction between the heat-sealing layers, strengthening the interlayer bonding strength. This avoids the defect of insufficient heat sealing at the corners of triangular jelly seals and reduces the probability of localized cracking, preventing jelly leakage and packaging bag cracking during storage and transportation, thus ensuring the sealing safety of food packaging.

[0022] 2. The longitudinal traction mechanism precisely controls the rated distance of the packaging bag's descent through the clamping mechanism and lifting unit, avoiding the problems of heat seal layer stretching and breakage and residue adhesion caused by the traditional heat sealing knife also acting as a traction device; the buffers on both sides of the connecting frame weaken the inertial impact of 90-degree rotation, preventing the heat sealing unit from shaking and shifting, and can adapt to faster rotation speeds. Combined with the precise matching of the first and second gaps, it effectively ensures the size consistency of each triangular jelly package, meets the requirements of standardized production, and also provides a guarantee for the automated connection of downstream boxing and labeling processes.

[0023] 3. By integrating a synchronized slitting mechanism and an automatic waste discharge structure, production efficiency is improved. The slitting mechanism starts synchronously with the lower heat-sealing assembly. The slitting blade with pointed protrusions at the top and bottom directly forms an easy-tear opening while completing the packaging slitting, eliminating the need for a separate easy-tear opening processing step. The slitting groove of the abutment plate is connected to the discharge pipe, enabling automatic separation of slitting waste and preventing waste from mixing into the finished product. In addition, the synchronous operation of heat sealing and slitting eliminates the need for secondary stops for packaging bags, significantly shortening the processing cycle of a single product. This reduces the defective product rejection rate and raw material loss, while also improving the overall production line's scale production capacity and the market adaptability of the finished product. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of a triangular jelly double-sealing packaging machine with rotary heat sealing according to the present invention;

[0025] Figure 2 This is a three-dimensional schematic diagram of the safety door opening in a triangular jelly double-sealing packaging machine with rotary heat sealing according to the present invention.

[0026] Figure 3 This is a three-dimensional schematic diagram of the spatial distribution of the heat-sealing unit and the longitudinal traction unit in a triangular jelly double-sealing packaging machine with rotary heat sealing according to the present invention. Figure 1 ;

[0027] Figure 4 This invention relates to a triangular jelly double-sealing packaging machine with rotary heat sealing. Figure 3 A magnified view of a portion of point A in the middle;

[0028] Figure 5 This invention relates to a triangular jelly double-sealing packaging machine with rotary heat sealing. Figure 3 A magnified view of a portion of point B in the middle;

[0029] Figure 6 This is a three-dimensional schematic diagram of the spatial distribution of the heat-sealing unit and the longitudinal traction unit in a triangular jelly double-sealing packaging machine with rotary heat sealing according to the present invention. Figure 2 ;

[0030] Figure 7 This invention relates to a triangular jelly double-sealing packaging machine with rotary heat sealing. Figure 6 A magnified view of a portion of point C in the middle;

[0031] Figure 8 This is a three-dimensional schematic diagram of the spatial distribution of the heat-sealing unit and the cutting unit in a triangular jelly double-sealing packaging machine with rotary heat sealing according to the present invention. Figure 1 ;

[0032] Figure 9 This is a three-dimensional schematic diagram of the spatial distribution of the heat-sealing unit and the cutting unit in a triangular jelly double-sealing packaging machine with rotary heat sealing according to the present invention. Figure 2 ;

[0033] Figure 10 This invention relates to a triangular jelly double-sealing packaging machine with rotary heat sealing. Figure 9 A magnified view of a portion of point D in the middle;

[0034] Figure 11 This is a three-dimensional schematic diagram of the spatial distribution of the heat-sealing unit and the cutting unit in a triangular jelly double-sealing packaging machine with rotary heat sealing according to the present invention. Figure 3 .

[0035] The following are the labels in the diagram: 1. Heat sealing unit; 11. Heat sealing assembly; 2. Rotation unit; 21. Synchronous belt; 22. Synchronous pulley; 23. Synchronous ring; 24. Motor; 25. Second position sensor; 3. Connecting frame; 31. Buffer; 4. Longitudinal traction mechanism; 41. Clamping mechanism; 411. Gripper; 42. Lifting unit; 5. Limiting frame; 6. Cutting mechanism; 61. Cutting blade; 611. Pointed protrusion; 62. Abutment plate; 621. Cutting groove; 63. Discharge pipe; 7. Longitudinal adjustment mechanism; 8. Support; 9. Triangular jelly outer packaging bag; 91. Easy-tear opening. Detailed Implementation

[0036] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figures 1-6 A triangular jelly double-sealing packaging machine with rotary heat sealing includes a heat sealing unit 1 and a rotating unit 2. The heat sealing unit 1 includes heat sealing components 11. Two heat sealing components 11 are arranged vertically. The outer packaging of the triangular jelly passes through the two heat sealing components 11 from top to bottom. The heat sealing patterns formed by the two heat sealing components 11 after heat sealing are different. The two heat sealing patterns overlap to form the pattern at the seal of the outer packaging of the triangular jelly after heat sealing. The lines in the two heat sealing patterns do not overlap.

[0038] Existing technologies for heat-sealing triangular jelly outer packaging bags 9 generally employ a single heat-sealing blade. Since the triangular jelly outer packaging bag 9 needs to form two mutually perpendicular sealing surfaces, the single heat-sealing blade must heat-seal both ends of the bag separately, with the heat-sealing directions perpendicular to each other. Due to the limitation of the single heat-sealing blade configuration, the sealing of both ends of the packaging bag can only undergo a single heat-sealing operation. The heat conduction depth and pressure duration of a single heat seal often fail to meet the sealing strength standards required for food packaging. Especially at the corner joints of the triangular seal, insufficient heat sealing can easily lead to weak seals. Subsequent storage and transportation, if subjected to compression or bumps, can result in jelly leakage, packaging bag cracking, and other quality defects.

[0039] More importantly, the triangular jelly outer packaging bag 9 needs to be simultaneously pulled during the heat sealing process to achieve continuous operation of the production line. To simplify the equipment structure and reduce production line costs, the existing solution omits the independent pulling mechanism and instead relies on a single heat sealing knife to directly move the packaging bag downwards after completing the heat sealing action, thereby achieving process connection. However, the core function of the heat sealing knife is to melt and bond the packaging film through high temperature and high pressure. Its structural design and action logic are not adapted to the needs of the pulling operation. This leads to mutual interference between the heat sealing and pulling actions. Before the heat sealing surface is completely cured and formed, the heat sealing knife needs to start the pulling displacement. When the triangular jelly outer packaging bag 9 in the heat sealing state is pulled, the heat sealing position will experience tensile deformation and even breakage. This will not only damage the initially formed sealing layer, but also greatly increase the difficulty of matching the heat sealing temperature and the pulling speed. At the same time, some residue of the triangular jelly outer packaging bag 9 will stick to the heat sealing unit 1. In addition, because the deformation of the softened triangular jelly outer packaging bag 9 under stress is uncontrollable, the actual descent of each packaging bag deviates significantly, making it impossible to maintain stable conveying accuracy.

[0040] The aforementioned process defects ultimately trigger a series of chain reactions in production and quality. On one hand, due to inconsistent sags in individual packages, the resulting triangular jelly outer packaging bags exhibit significant size variations, failing to meet standardized production requirements and hindering the automated integration of downstream processes such as boxing and labeling. On the other hand, loose or broken seals directly cause leakage of the filling from the sealed gaps, resulting in direct waste of raw materials, pollution of production equipment and the surrounding environment, and increased cleaning and maintenance costs for the production line. Furthermore, products with incorrect dimensions or leakage must be rejected as defective, significantly increasing the defect rate, reducing overall production efficiency, and imposing additional raw material losses and rework costs on the company, severely restricting the large-scale, high-quality production of the triangular jelly packaging process.

[0041] To avoid the above situation, the existing triangular jelly packaging machine is optimized by adding a heat-sealing component 11. Two heat-sealing components 11 sequentially heat-seal the opening of the triangular jelly outer packaging bag 9. The two heat-sealing components 11 form overlapping patterns at the opening, and the lines in the corresponding heat-sealing patterns of the two heat-sealing components 11 do not overlap after overlapping. The specific structure and working process of this invention are as follows: First, the triangular jelly outer packaging bag 9 is pulled into the heat-sealing unit 1, so that the triangular jelly outer packaging bag 9 passes through the upper heat-sealing component 11 for heat sealing. The heat-sealing component 11 includes a heat-sealing knife and a drive structure. The drive structure can be hydraulic, pneumatic, or electric. Since the heat-sealing component 11 is existing technology, it will not be described in detail here. After the upper heat-sealing component 11 completes one heat seal on the triangular jelly outer packaging bag 9, it is released, and the triangular jelly outer packaging bag 9 descends a rated distance. The rated distance needs to be determined according to the actual size of the triangular jelly produced. The process of adjusting the size of the triangular jelly will be described below. When the triangular jelly outer packaging bag 9 stops descending, the rotating unit 2 drives the heat-sealing unit 1 to rotate 90 degrees. Then, the upper heat-sealing component 11 heat-seals the triangular jelly outer packaging bag 9 again. After the heat seal is completed, the triangular jelly packaging has been initially formed. As the triangular jelly outer packaging bag 9 continues to descend, the two ends of the initially formed triangular jelly packaging are successively heat-sealed a second time by the lower heat-sealing component 11. At this time, the triangular jelly is fully formed, and the sealing area of ​​the triangular jelly packaging has superimposed heat-sealing patterns. By using different patterns for the two heat seals, and the lines in the two heat-sealing patterns do not overlap, the contact area and friction between the heat-sealing layers are increased, the interlayer bonding strength is improved, and the probability of local cracking during heat sealing is also avoided.

[0042] Reference Figures 3-5 The textures formed after heat sealing of the two heat-sealing components 11 are a mesh pattern and a straight plain pattern, respectively.

[0043] In the actual heat sealing process, you can either heat seal the mesh pattern first and then heat seal the straight plain pattern, or you can heat seal the straight plain pattern first and then heat seal the mesh pattern, so that the mesh pattern and the straight plain pattern overlap, and the lines in the mesh pattern and the lines in the straight plain pattern do not overlap.

[0044] Reference Figure 11 The packaging machine also includes a connecting frame 3 and a buffer 31; the connecting frame 3 is used to support the heat sealing unit 1, and the rotating unit 2 drives the heat sealing unit 1 to swing on the horizontal plane through the connecting frame 3; there are two buffers 31, and the two buffers 31 are respectively set on both sides of the connecting frame 3 along the swing direction of the connecting frame 3.

[0045] Because the upper and lower sealing directions of the triangular jelly packaging are perpendicular to each other, the connecting frame 3 needs to rotate the heat-sealing unit 1 after each heat-sealing operation, with each rotation angle being 90 degrees. However, if the rotation speed is too fast, and the connecting frame 3 needs to stop quickly upon reaching the designated position, the heat-sealing unit 1 mounted on the connecting frame 3 will shake more. To improve the stability of the connecting frame 3 during rotation, buffers 31 are provided on both sides of the connecting frame 3 to reduce the inertia of the connecting frame 3 during rotation and prevent the heat-sealing unit 1 mounted on the connecting frame 3 from shaking during rotation. At the same time, due to the buffers 31, the connecting frame 3 in this invention can rotate faster than the traditional rotating frame while ensuring safety, resulting in a faster heat-sealing effect.

[0046] Reference Figure 2 and Figure 6 A longitudinal traction mechanism 4 is provided on the upper part of the heat sealing unit 1. The longitudinal traction mechanism 4 includes a clamping mechanism 41 that can clamp the triangular jelly outer packaging bag 9 and a lifting unit 42 that can drive the clamping mechanism 41 to move in the vertical direction.

[0047] When it is necessary to pull the triangular jelly outer packaging bag 9, the clamping mechanism 41 first clamps the triangular jelly outer packaging bag 9, and then the lifting unit 42 drives the clamping mechanism 41 to descend a rated distance. The lifting unit 42 can be a crank mechanism, a lead screw mechanism, etc. By setting a first position sensor on one side of the lifting unit 42, the descent position of the clamping mechanism 41 is detected by the first position sensor. When the first position sensor descends to the preset position, the clamping mechanism 41 releases the triangular jelly outer packaging bag 9, and then the lifting unit 42 drives the clamping mechanism 41 to rise and reset.

[0048] Reference Figure 3The clamping mechanism 41 includes two grippers 411 arranged in a horizontal direction. A limiting frame 5 is provided above the clamping mechanism 41. The limiting frame 5 has two horizontal bars that can limit the triangular jelly outer packaging bag 9. The arrangement direction of the two horizontal bars is parallel to the horizontal plane and perpendicular to the arrangement direction of the two grippers 411.

[0049] Before heat sealing, the triangular jelly outer packaging bag 9, filled with jelly, has a cylindrical structure. The distance between the two crossbars is the same as the outer diameter of the triangular jelly outer packaging bag 9 after filling with jelly. When the two grippers 411 are not gripping the triangular jelly outer packaging bag 9, the two grippers 411 have a limiting function on the triangular jelly outer packaging bag 9, and the triangular jelly outer packaging bag 9 can only move between the two grippers 411. The arrangement direction of the two grippers 411 on the clamping mechanism 41 is perpendicular to the arrangement direction of the two crossbars, realizing four-point limiting of the triangular jelly outer packaging bag 9 by the two grippers 411 and the two crossbars, ensuring that the triangular jelly can enter the heat sealing unit 1 smoothly and accurately.

[0050] Reference Figure 6 , Figure 7 and Figure 9 Below the heat-sealing unit 1, there is also a cutting mechanism 6 for cutting the triangular jelly after heat sealing. The cutting mechanism 6 rotates synchronously with the heat-sealing unit 1.

[0051] The triangular jelly, after heat sealing, is cut into individual pieces by a cutting mechanism 6. A support 8 is located below the connecting frame 3, and the connecting frame 3 passes through the support 8 to connect with the cutting mechanism 6. The rotating unit 2 includes a synchronous belt 21, a synchronous pulley 22, a synchronous ring 23, a motor 24, and a second position sensor 25. The synchronous pulley 22 is located on one side of the connecting frame 3, and the synchronous ring 23 is fitted onto the connecting frame 3. Both ends of the synchronous belt 21 are fitted onto the synchronous pulley 22 and the synchronous ring 23, respectively, and are engaged in transmission with them. The motor 24 is located at the end of the synchronous pulley 22 and is used to drive the synchronous pulley 22 to rotate. A second position sensor 25 is located on one side of the synchronous pulley 22. The second position sensor 25 is used to detect the rotation angle of the synchronous pulley 22. Since the ratio of the diameter of the synchronous pulley 22 to the diameter of the synchronous ring 23 is constant, the rotation angle of the synchronous ring 23 can be detected.

[0052] Reference Figure 8 and Figure 11 A longitudinal adjustment mechanism 7 is provided on one side of the slitting mechanism 6. The longitudinal adjustment mechanism 7 is used to drive the slitting mechanism 6 to move in the vertical direction. The distance between the slitting mechanism 6 and the lower heat sealing assembly 11 is called the first gap. The distance of the clamping mechanism 41 in a single descent is called the second gap. The first gap and the second gap are equal.

[0053] The size of the triangular jelly outer packaging bag 9 varies depending on the size of the triangular jelly produced. The distance the triangular jelly outer packaging bag 9 descends in a single descent during transport determines the size of the triangular jelly. Therefore, the size of the triangular jelly can be changed by adjusting the single descent distance of the clamping mechanism 41. To improve efficiency, the heat sealing unit 1 and the cutting mechanism 6 are activated simultaneously each time the triangular jelly outer packaging bag 9 stops descending. This ensures that the first and second distances between the cutting mechanism 6 and the lower heat sealing component 11 are equal, guaranteeing the accuracy of the cutting process. Furthermore, it eliminates the need for the triangular jelly outer packaging bag 9 to stop twice due to cutting, thus improving production efficiency.

[0054] Reference Figure 10 The slitting mechanism 6 includes a slitting blade 61 and an abutment plate 62. The slitting blade 61 is horizontally movably positioned below the heat-sealing unit 1, and both the upper and lower end faces of the slitting blade 61 are provided with pointed protrusions 611. The abutment plate 62 is positioned on one side of the blade head of the slitting blade 61, and the heat-sealed triangular jelly outer packaging bag 9 is located between the slitting blade 61 and the abutment plate 62. A slitting groove 621 is provided on the abutment plate 62, and the slitting blade 61 can be inserted into the slitting groove 621 when it moves.

[0055] By providing a cutting groove 621 on the abutment plate 62, the cutting blade 61 can insert into the cutting groove 621 during movement, ensuring that the triangular jelly outer packaging bag 9 located between the cutting blade 61 and the abutment plate 62 can be completely cut without any partial connection, eliminating the need for subsequent manual separation. Simultaneously, because the cutting blade 61 has pointed protrusions 611 at both the top and bottom, an easy-tear opening 91 is left at the seal of the triangular jelly packaging after cutting, facilitating the tearing of the triangular jelly during subsequent consumption. No additional process is needed to process the easy-tear opening 91 on the triangular packaging, thus improving work efficiency.

[0056] Reference Figure 8 A discharge pipe 63 is provided on the side of the abutment plate 62 away from the slitting blade 61, and the discharge pipe 63 is connected to the slitting groove 621.

[0057] When the slitting blade 61 cuts the triangular jelly outer packaging bag 9, the cut-off waste material will fall through the slitting groove 621 into the discharge pipe 63 and be discharged, thus separating the waste material from the triangular jelly packaging and preventing the waste material from mixing with the triangular jelly packaging.

[0058] Reference Figures 1-11 This invention also relates to a method for double-sealing packaging of triangular jelly with rotary heat sealing, using a triangular jelly double-sealing packaging machine with rotary heat sealing. The specific steps are as follows:

[0059] S1. Adjust the descent traction and cutting amount of the triangular jelly outer packaging bag 9 according to the required size of the triangular jelly to be produced, and then start the packaging machine;

[0060] S2. The triangular jelly outer packaging bag 9 enters the heat sealing unit 1 for heat sealing. The heat sealing component 11 located on the upper side first performs two preliminary heat seals on the triangular jelly outer packaging bag 9. The extension directions of the two preliminary heat seals are perpendicular to each other, and the triangular jelly outer packaging bag 9 is isolated into a separate package through preliminary heat sealing. The upper and lower ends of the separate package have heat sealing textures.

[0061] S3. The triangular jelly outer packaging bag 9, after being heat-sealed by the upper heat-sealing component 11, descends to the position of the lower heat-sealing component 11 and stops. It is then heat-sealed a second time by the lower heat-sealing component 11 to form a heat-sealing pattern that combines mesh and straight plain weave.

[0062] S4. Cut the triangular jelly outer packaging bag into 9 parts after the second heat sealing.

[0063] Working principle: Operators adjust the descent and cutting amounts of the triangular jelly outer packaging bag 9 according to the preset dimensions of the triangular jelly to be produced. On one hand, by adjusting the stroke of the lifting unit 42 in the longitudinal traction mechanism 4, the second distance of a single descent of the clamping mechanism 41 is determined. This distance directly determines the basic size of a single triangular jelly package. On the other hand, the longitudinal adjustment mechanism 7 is operated to move the cutting mechanism 6 vertically, changing the size of the first distance. This ensures that the first and second distances between the cutting mechanism 6 and the lower heat-sealing component 11 are consistent, guaranteeing that subsequent heat-sealing and cutting processes can be synchronously connected. Once all parameters are adjusted, the entire packaging machine can be started, entering a continuous production process.

[0064] After the triangular jelly outer packaging bag 9 completes the initial feeding and jelly filling, it will first enter the heat sealing unit 1 for preliminary heat sealing. Before entering the heat sealing unit 1, the cylindrical outer packaging bag filled with jelly will first pass through the four-point limit frame 5 and the clamping mechanism 41: the two horizontal bars of the limit frame 5 are adapted to the outer diameter of the jelly bag, and the two claws 411 of the clamping mechanism 41 are arranged perpendicular to the horizontal bars. The double limit ensures that the packaging bag is accurately fed into the upper heat sealing component 11. The drive structure of the upper heat sealing component 11 will first drive the heat sealing knife to complete the first heat sealing. After the heat sealing is completed, the heat sealing component 11 is released, and the clamping mechanism 41 of the longitudinal traction mechanism 4 will clamp the packaging bag and lower it a rated distance and stop. Then, the rotating unit 2 drives the heat sealing unit 1 to rotate 90 degrees through the connecting frame 3. The buffers 31 on both sides will weaken the rotational inertia of the connecting frame 3 to prevent the heat sealing unit 1 from shaking and deviating. After the heat sealing unit 1 is stable, the upper heat sealing component 11 will perform a second heat sealing on the packaging bag. The two heat seals extend in perpendicular directions, which not only separates the continuous outer packaging bags into individual packages to be formed, but also forms basic heat seal patterns at the top and bottom of each package, laying a solid foundation for the subsequent secondary sealing.

[0065] The triangular jelly outer packaging bag 9, after initial heat sealing, will continue to descend under the drive of the longitudinal traction mechanism 4 until it reaches the working position of the lower heat sealing component 11 and stops, then enters the secondary heat sealing process. The lower heat sealing component 11 will perform secondary heat pressing on the sealed area of ​​the packaging, and its heat sealing pattern will overlap with the pattern formed by the upper heat sealing component 11.

[0066] After the secondary heat-sealing process is completed, the triangular jelly outer packaging bag 9 will immediately enter the cutting process to achieve the final shaping of the finished product. The cutting mechanism 6 starts synchronously with the lower heat-sealing component 11, and the cutting blade 61 moves horizontally towards the abutment plate 62. The pointed protrusions 611 on its upper and lower end faces are inserted into the cutting groove 621 of the abutment plate 62 along with the cutting blade 61, which not only ensures that the continuous packaging is completely cut into independent units, but also forms an easy-tear opening 91 at the seal, eliminating the need for an additional easy-tear opening 91 processing step. During the cutting process, the cut packaging waste will pass through the cutting groove 621 and enter the discharge pipe 63 connected to it, realizing the automatic separation of waste and finished product.

[0067] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A method for double-sealing packaging of triangular jelly with rotary heat sealing, comprising a triangular jelly double-sealing packaging machine with rotary heat sealing, characterized in that: The machine includes a heat-sealing unit (1) and a rotating unit (2); the heat-sealing unit (1) includes a heat-sealing component (11), and there are two heat-sealing components (11) arranged vertically. The triangular jelly outer packaging passes through the two heat-sealing components (11) from top to bottom. The heat-sealing patterns formed by the two heat-sealing components (11) after heat sealing are different. The two heat-sealing patterns overlap to form the pattern at the seal of the triangular jelly outer packaging after heat sealing. The lines in the two heat-sealing patterns do not overlap. The heat-sealing patterns formed by the two heat-sealing components (11) after heat sealing are a mesh pattern and a straight plain pattern, respectively. The packaging machine also includes a connecting frame (3) and a buffer (31); the connecting frame ( 3) Used to receive the heat sealing unit (1), the rotating unit (2) drives the heat sealing unit (1) to swing on the horizontal plane through the connecting frame (3); two buffers (31) are provided, and the two buffers (31) are respectively set on both sides of the connecting frame (3) along the swing direction of the connecting frame (3); the upper part of the heat sealing unit (1) is provided with a longitudinal traction mechanism (4), the longitudinal traction mechanism (4) includes a clamping mechanism (41) that can clamp the triangular jelly outer packaging bag (9) and a lifting unit (42) that can drive the clamping mechanism (41) to move in the vertical direction; the clamping mechanism (41) includes two jaws (411) arranged in the horizontal direction, and the clamping mechanism (41) is used to receive the heat sealing unit (1). A limiting frame (5) is provided above the heat sealing unit (1). The limiting frame (5) has two horizontal bars that can limit the triangular jelly outer packaging bag (9). The arrangement direction of the two horizontal bars is parallel to the horizontal plane and perpendicular to the arrangement direction of the two grippers (411). A cutting mechanism (6) is also provided below the heat sealing unit (1) to cut the triangular jelly after heat sealing. The cutting mechanism (6) rotates synchronously with the heat sealing unit (1). A longitudinal adjustment mechanism (7) is provided on one side of the cutting mechanism (6). The longitudinal adjustment mechanism (7) is used to drive the cutting mechanism (6) to move in the vertical direction. The distance between the cutting mechanism (6) and the lower heat sealing component (11) is called the first distance. The distance that the clamping mechanism (41) descends in a single step is called the second spacing, and the first spacing is equal to the second spacing; the cutting mechanism (6) includes a cutting blade (61) and an abutment plate (62); the cutting blade (61) is horizontally moved and positioned below the heat sealing unit (1), and the upper and lower end faces of the cutting blade (61) are provided with pointed protrusions (611); the abutment plate (62) is positioned on one side of the cutting blade (61), and the heat-sealed triangular jelly outer packaging bag (9) is located between the cutting blade (61) and the abutment plate (62). A cutting groove (621) is provided on the abutment plate (62), and the cutting blade (61) can be inserted into the cutting groove (621) when it moves; the specific steps are as follows: S1. Adjust the descent traction and cutting amount of the triangular jelly outer packaging bag (9) according to the required size of the triangular jelly to be produced, and then start the packaging machine; S2. The triangular jelly outer packaging bag (9) enters the heat sealing unit (1) for heat sealing. The heat sealing component (11) located on the upper side first performs two preliminary heat seals on the triangular jelly outer packaging bag (9). The extension directions of the two preliminary heat seals are perpendicular to each other. The triangular jelly outer packaging bag (9) is isolated into a separate package through preliminary heat sealing. The upper and lower ends of the separate package have heat sealing textures. S3. After being heat-sealed by the upper heat-sealing component (11), the triangular jelly outer packaging bag (9) descends to the position of the lower heat-sealing component (11) and stops. It is then heat-sealed a second time by the lower heat-sealing component (11) to form a heat-sealing pattern that combines mesh and straight plain weave. S4. Cut the triangular jelly outer packaging bag (9) after the second heat sealing is completed.

2. The method for double-sealing packaging of triangular jelly with rotary heat sealing according to claim 1, characterized in that, A discharge pipe (63) is provided on the side of the abutment plate (62) away from the slitting blade (61), and the discharge pipe (63) is connected to the slitting groove (621).

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