Elastic melt cut device for rotary reciprocating cross-sealing mechanism

Abstract

The application discloses a flexible melt cutting device for a rotary reciprocating transverse sealing mechanism, which comprises oppositely arranged first and second sealing assemblies, the first sealing assembly comprises a first sealer and a first melt cutting knife, and the second sealing assembly comprises a second sealer and a second melt cutting knife. A heating unit is arranged in the first sealer and / or the second sealer, the heating unit heats the sealing surface of the corresponding sealer, and the melt cutting knife is heated through heat conduction, so that the melt cutting knife has a hot melting function. The first melt cutting knife is elastically connected with the first sealer through an elastic connecting member, and generates elastic sliding displacement when bearing melt cutting bearing force, thereby realizing decoupling of the melt cutting bearing force and the sealing pressure. Through the synergistic effect of thermal coupling and elastic sliding, the application effectively avoids the tearing defect of the incision of the insert cutting knife caused by pollution, simultaneously solves the problem of mutual interference of pressure when the face sealing and the hot melt cutting are simultaneously performed, and significantly improves the sealing and cutting quality and the equipment operation stability.

Description

Technical Field

[0001] This application relates to the field of packaging machinery technology, and in particular to an elastic melting and cutting device for a rotary reciprocating horizontal sealing mechanism. Background Technology

[0002] This invention relates to the field of packaging machinery technology, specifically to an elastic melting and cutting device for a rotary reciprocating horizontal sealing mechanism. In packaging machinery, the rotary reciprocating horizontal sealing mechanism seals the packaging film by the relative rotation and meshing of upper and lower sealers, which is a surface sealing method. In existing rotary reciprocating horizontal sealing mechanisms, sealing and cutting are usually completed independently by different components. The sealing function is achieved by a sealer with a heating unit, while the cutting function is generally completed by a cutting blade (i.e., a toothed blade that uses mechanical shearing force to cut). However, the existing structure has obvious limitations in practical applications.

[0003] Because the sealing and cutting actions overlap in time, if the melting and cutting blade is rigidly fixed directly to the sealer, the huge melting and cutting force generated by the blade when cutting the packaging will be directly transmitted to the sealer, causing drastic fluctuations in sealing pressure and thus compromising the sealing quality of the surface seal. Therefore, most rotary reciprocating horizontal sealing mechanisms on the market are forced to adopt a purely mechanical shearing insert-cutting blade structure. However, the insert-cutting blade relies on the mechanical shearing force of the blade edge for cutting, making it extremely sensitive to the working environment. Once the contents of the packaging (such as sauce packets or seasoning packets in instant noodles) contaminate the teeth of the insert-cutting blade, the blade edge will become dull and the tooth shape will become irregular, resulting in severe irregular tearing defects at the cut, which seriously affects the appearance of the packaged product. In order to maintain a certain cutting effect, users have to frequently stop the machine to clean the contaminants on the insert-cutting blade, which seriously reduces production efficiency and the operational stability of the equipment. In addition, the traditional heating unit is only used to heat the sealing surface and does not generate thermal coupling with the cutting blade, so the cutting blade lacks thermal melting capability and cannot effectively improve the cutting quality through high-temperature melting.

[0004] Therefore, how to avoid the tearing defect caused by easy contamination of the cutting blade in the rotary reciprocating horizontal sealing mechanism, and effectively solve the interference of the hot melt cutting method on the sealing pressure, is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, this application provides an elastic melting and cutting device for a rotary reciprocating horizontal sealing mechanism, which can decouple the hot melting and cutting from the surface sealing pressure, and effectively avoid the tearing defects caused by the contamination of the cutting blade while ensuring the sealing quality.

[0006] This application is achieved through the following technical solution: An elastic melting and cutting device for a rotary reciprocating horizontal sealing mechanism includes a first sealing assembly and a second sealing assembly disposed opposite to each other. The first sealing assembly includes a first sealer and a first melting and cutting blade. The second sealing assembly includes a second sealer and a second melting and cutting blade. At least one of the first sealer and the second sealer is provided with a heating unit inside. The heating unit is used to heat the sealing surface of the corresponding sealer and to heat the first melting cutter and / or the second melting cutter through heat conduction, so that the first melting cutter and / or the second melting cutter have a heat melting function. Wherein, the first welding cutter is elastically connected to the first sealer through an elastic connecting member, so as to allow the first welding cutter to generate elastic sliding displacement relative to the first sealer when bearing welding and cutting force, and / or the second welding cutter is elastically connected to the second sealer through the elastic connecting member, so as to allow the second welding cutter to generate elastic sliding displacement relative to the second sealer when bearing welding and cutting force.

[0007] Furthermore, during the relative pressing process between the first sealer and the second sealer, the first welding cutter, under the pre-tightening force of the elastic connecting member, contacts the packaging film before the sealing surface of the first sealer, and / or the second welding cutter, under the pre-tightening force of the elastic connecting member, contacts the packaging film before the sealing surface of the second sealer.

[0008] By adopting the above technical solution, the heating unit heats the sealing surface of the corresponding sealer and heats the first or second melting and cutting blade through heat conduction, enabling the melting and cutting blade to have a heat-melting function. This completely avoids the irregular tearing defects caused by the packaging contents contaminating the blade edge when the traditional insert cutter relies on pure mechanical shearing force for cutting. At the same time, the melting and cutting blade is elastically connected to the sealer through an elastic connecting component. When bearing the melting and cutting force, it can generate elastic sliding displacement, separating the melting and cutting force from the sealing pressure system. This solves the prominent contradiction of mutual pressure interference when the surface sealing and heat-melting cutting are carried out simultaneously in the rotary reciprocating horizontal sealing mechanism, and significantly improves the stability and reliability of the sealing and cutting quality.

[0009] Optionally, the first welding cutter is elastically connected to the first sealer through the elastic connecting member, and during the relative pressing of the first sealer and the second sealer, the first welding cutter contacts the packaging film before the sealing surface of the first sealer under the pre-tightening force of the elastic connecting member; the second welding cutter is rigidly fixedly connected to the second sealer.

[0010] By adopting the above technical solution, one side of the welding blade is elastically connected to the sealer while the other side of the welding blade is rigidly fixed to the sealer, forming a flexible-rigid combination. This clearly defines the only flexible path for pressure release. Moreover, this modular arrangement of elastic connection and rigid fixation allows the assembly positions of the first sealing component and the second sealing component to be interchanged, adapting to the layout requirements of different packaging machine installation orientations and gravity offset directions. This significantly enhances the versatility of the equipment without changing the core function.

[0011] Optionally, the sealing surface of the first sealer is provided with a groove along the length direction in the middle, which is adapted to the first welding cutter. The first welding cutter is slidably connected in the groove, and the sliding surface of the first welding cutter abuts against the groove wall surface. The elastic connecting member is disposed in the groove. The sealing surface of the second sealer is provided with a mounting groove along the length direction in the middle, which is adapted to the second welding cutter. The second welding cutter is fixed in the mounting groove.

[0012] By adopting the above technical solution, a groove adapted to the first welding cutter is provided along the length direction in the middle of the sealing surface of the first sealer, so that the first welding cutter is slidably connected in the groove. At the same time, an installation groove is provided in the second sealer to fix the second welding cutter therein. The groove structure provides precise guidance and positioning for the elastic sliding of the welding cutter, effectively preventing the welding cutter from lateral deflection or torsion during the reciprocating high-frequency sliding process, ensuring the parallelism between the welding surface and the sealing surface, and thus ensuring the airtightness and flatness of the seal. The sliding surface of the first welding cutter abuts and fits against the groove wall to increase the heat conduction area between the first welding cutter and the first sealer, and at the same time improve the sliding guidance stability of the first welding cutter in the groove.

[0013] Optionally, both the first and second seals are provided with insertion holes arranged along the length direction. The insertion holes are used to place the heating unit. The insertion holes on the first seal are symmetrically arranged on both sides of the slide groove so that the heat generated by the heating unit is evenly transferred to the sealing surface of the first seal and the first welding cutter. The insertion holes on the second seal are symmetrically arranged on both sides of the mounting groove so that the heat generated by the heating unit is evenly transferred to the sealing surface of the second seal and the second welding cutter.

[0014] By adopting the above technical solution, insertion holes are set in the sealer along the length direction, and the insertion holes on the first sealer are symmetrically arranged on both sides of the slide groove. This allows the heat generated by the heating unit to be evenly conducted from both sides to the center of the slide groove, eliminating the temperature gradient caused by unilateral heating. This effectively avoids extreme conditions such as local overheating of the sealer or insufficient temperature of the cutting blade, ensuring the uniformity of heat distribution along the length direction of the entire sealing surface and the cutting blade, and significantly improving the uniformity of the sealing and cutting process.

[0015] Optionally, the first welding cutter is provided with an oval limiting hole, and the slide groove is provided with a limiting screw that is adapted to the oval limiting hole, and the limiting screw is slidably connected in the oval limiting hole.

[0016] By adopting the above technical solution, an oblong limiting hole is set on the first welding cutter, and a limiting screw adapted to the oblong limiting hole is set in the slide groove, so that the limiting screw is slidably connected in the oblong limiting hole. The stroke limiting function of the oblong hole strictly constrains the elastic sliding distance of the welding cutter within the preset safety range. This ensures that the welding cutter can effectively retract and release pressure when bearing the welding and cutting load, and prevents the welding cutter from falling out of the slide groove or mechanically interfering with the surrounding structure due to excessive sliding. At the same time, the limiting screw forms an effective anti-torsion constraint on the welding cutter, ensuring the structural stability under high-speed rotation and reciprocating operation.

[0017] Optionally, it also includes a first crossbeam and a second crossbeam, wherein the first sealing component is detachably connected to the first crossbeam, and the second sealing component is detachably connected to the second crossbeam; the end face of the first crossbeam where it is assembled with the first sealing component is provided with spaced-apart support platforms; the bottom end of the first sealing component abuts against the support platforms, and a heat-blocking groove is formed between adjacent support platforms; the heat-blocking groove is used to reduce the contact area between the first sealing component and the first crossbeam to reduce heat conduction, and the heat-blocking groove forms a clearance space for the elastic connecting member to perform adjustment operations.

[0018] By adopting the above technical solution, spaced support platforms are set on the end face of the first crossbeam where it is assembled with the first sealing component. The bottom end of the first sealing component abuts against the support platforms, and a heat-blocking groove is formed between adjacent support platforms. This heat-blocking groove significantly reduces the thermal contact area between the sealing component and the crossbeam, effectively blocking the heat conduction and loss from the sealer and the cutting blade towards the crossbeam. This allows the high-temperature melting state of the cutting blade to be maintained stably and continuously, avoiding the problem of insufficient cutting temperature due to excessive heat loss. At the same time, the heat-blocking groove also naturally forms a clearance space for the elastic connecting component to be adjusted. The parameters of the internal elastic component can be adjusted without disassembling the entire sealing component, achieving a dual function of heat insulation and convenient maintenance.

[0019] Optionally, the elastic connecting member includes a connector and an elastic element; the upper end face of the connector is provided with a snap-fit ​​groove for the first or second welding cutter, the lower end face of the connector is provided with a stud, and an adjusting sleeve is threaded onto the stud; the bottom of the groove is provided with a clearance hole for the adjusting sleeve to pass through, and the first crossbeam is provided with a receiving groove adapted to the elastic element; the elastic element is sleeved on the stud and placed between the bottom of the receiving groove and the adjusting sleeve.

[0020] By adopting the above technical solution, the elastic connecting component adopts a structure combining a connector, stud, adjusting sleeve, and elastic element. The snap-fit ​​groove on the upper end face of the connector firmly engages with the melting and cutting blade, and the stud on the lower end face is threadedly engaged with the adjusting sleeve. The elastic element is sleeved on the stud and placed between the bottom of the receiving groove and the adjusting sleeve. The operator can precisely change the pre-compression amount of the elastic element by turning the adjusting sleeve, thereby achieving high-precision adjustment of the critical back pressure value of the melting and cutting blade. This allows the equipment to match the most suitable hot melt cutting pressure for packaging films of different materials and thicknesses, expanding the process application range of the equipment.

[0021] Optionally, the receiving groove is located between adjacent support platforms, the adjusting sleeve is exposed in the heat-blocking groove, and the width of the heat-blocking groove is configured to allow an external adjusting tool to extend into and rotate the adjusting sleeve.

[0022] By adopting the above technical solution, the receiving groove is set between adjacent support platforms, the adjusting sleeve is exposed in the heat blocking groove, and the width of the heat blocking groove is configured to allow external adjusting tools to be inserted and rotated. This structure makes full use of the space of the heat blocking groove as an adjustment operation window that does not require disassembly. Operators can directly make pressure fine adjustments during production breaks without lifting the crossbeam or disassembling the sealing components, which greatly shortens the downtime for adjustment and significantly improves the equipment's rapid response capability and maintenance efficiency during the production process.

[0023] Optionally, the connector is made of heat-insulating material.

[0024] By adopting the above technical solution, the connector is made of heat-insulating material, forming an effective thermal barrier between the cutting blade and the elastic element. This prevents the high temperature of the cutting blade from being transmitted to the elastic element and the beam, effectively preventing the elastic element from annealing and softening or experiencing elastic fatigue attenuation under continuous high-temperature conditions. This ensures that the elastic sliding mechanism maintains stable elastic characteristics and reset accuracy under long-term high-speed operation, significantly extending the service life and maintenance-free cycle of the core elastic element.

[0025] Optionally, a thermally conductive and lubricating layer is provided on the sliding mating surface of the first or second welding cutter. The thermally conductive and lubricating layer is any one of a graphite filler layer, a composite lubricating layer treated with polytetrafluoroethylene, or a copper-based self-lubricating composite material layer. The surface of the first or second welding cutter is provided with a receiving groove, which is arranged circumferentially along the thermally conductive and lubricating layer to collect the powder generated by the wear of the thermally conductive and lubricating layer.

[0026] By adopting the above technical solution, the thermally conductive lubricating layer provides excellent lubrication conditions for the high-frequency reciprocating sliding between the melting and cutting blade and the sealer, ensuring the smoothness of the sliding process. It also improves the heat transfer efficiency between the contact surfaces by utilizing the thermal conductivity of the material itself. At the same time, a accommodating groove is set on the surface of the melting and cutting blade along the circumference of the thermally conductive lubricating layer. The accommodating groove can actively receive and collect the powder particles generated by the thermally conductive lubricating layer during long-term friction and wear, avoiding the secondary pollution caused by solid lubricating powder falling into the packaging sealing area. While ensuring the dual functions of lubrication and heat conduction under high-temperature conditions, it effectively maintains the cleanliness of the sealing area and completely solves the problem of contaminating the contents of the packaging after the solid lubricating material wears out.

[0027] In summary, this application includes at least one of the following beneficial technical effects: This application uses a heating unit to conduct heat to the melting and cutting blade, enabling the melting and cutting blade to have a heat-melting function, thus avoiding the tearing defects of the cutting blade caused by contamination. At the same time, it uses elastic sliding displacement to decouple the melting and cutting force from the sealing pressure, thus solving the pressure interference problem when surface sealing and heat-melting cutting are performed simultaneously. This application, by setting a heat-blocking groove, reduces the contact area between the sealing component and the crossbeam, reduces heat conduction, and forms a clearance space for the elastic connecting component to perform adjustment operations, thus achieving the dual functions of heat insulation and convenient maintenance. This application, by setting up a thermally conductive lubricating layer and a retention groove, effectively maintains the cleanliness of the sealed area while ensuring the dual functions of lubrication and heat conduction under high-temperature conditions, thus solving the problem of contamination of the packaging contents after the wear of solid lubricating materials. Attached Figure Description

[0028] Figure 1 This is a front view structural schematic diagram of the rotary reciprocating horizontal sealing mechanism in Embodiment 1 of this application; Figure 2 This is a three-dimensional structural schematic diagram of the first sealing component in Embodiment 1 of this application; Figure 3 This is a three-dimensional structural schematic diagram of the first sealer in Embodiment 1 of this application; Figure 4 This is a three-dimensional structural schematic diagram of the first melting and cutting blade in Embodiment 2 of this application; Figure 5 This is a three-dimensional structural schematic diagram of the second sealing component in Embodiment 1 of this application; Figure 6 This is a schematic diagram of the arrangement structure of the elastic connection members in Embodiment 1 of this application; Figure 7 This is a schematic diagram of the elastic connecting member in Embodiment 1 of this application in the state of the packaging film being sealed; Figure 8This is a cross-sectional view of the first welding and cutting blade in Embodiment 2 of this application; Figure 9 This is a three-dimensional structural schematic diagram of the first sealer in Embodiment 2 of this application; Figure 10 This is a schematic diagram of the arrangement structure of the elastic connection members in Embodiment 3 of this application.

[0029] In the figure: 1. First sealing assembly; 11. First sealer; 111. Slide groove; 12. First welding cutter; 121. Oval limiting hole; 122. Thermally conductive lubricating layer; 123. Reception groove; 13. Elastic connecting member; 131. Connector; 1311. Snap-fit ​​groove; 1312. Stud; 132. Elastic element; 133. Adjusting sleeve; 14. Limiting screw; 2. Second sealing assembly; 21. Second sealer; 211. Mounting groove; 22. Second welding cutter; 3. First crossbeam; 31. Support platform; 32. Heat blocking groove; 33. Reception groove; 34. Positioning groove; 4. Second crossbeam; 5. Insertion hole; 6. Heating unit. Detailed Implementation

[0030] The technical solutions of various embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example 1

[0031] Reference Figure 1 and Figure 3 This application discloses an elastic melting and cutting device for a rotary reciprocating horizontal sealing mechanism, including a first sealing component 1 and a second sealing component 2 arranged opposite to each other. The first sealing component 1 is detachably connected to the first crossbeam 3 by fastening bolts. Specifically, the first crossbeam 3 is provided with a positioning groove 34, and the positioning groove 34 is provided with an adjusting screw hole 35 in the width direction. An adjusting screw is threaded into the adjusting screw hole 35 to adjust the installation position of the sealing component in the positioning groove, and finally locked and fixed by fastening bolts. Similarly, the second sealing component 2 and the second crossbeam 4 can also be assembled with the same structural form as the first sealing component 1 and the first crossbeam 3.

[0032] Reference Figure 2 and Figure 4The first sealing assembly 1 includes a first sealer 11 and a first welding cutter 12. A groove 111 adapted to the first welding cutter 12 is provided in the middle of the sealing surface of the first sealer 11 along its length. The first welding cutter 12 is slidably connected within the groove 111. The sliding surface of the first welding cutter 12 abuts against the groove wall of the groove 111 to increase the heat conduction area between the first welding cutter 12 and the first sealer 11, and simultaneously improve the sliding guidance stability of the first welding cutter 12 within the groove 111. The first sealer 11 has insertion holes 5 arranged along its length for placing a heating unit 6. The insertion holes 5 on the first sealer 11 are symmetrically arranged on both sides of the groove 111 to ensure that the heat generated by the heating unit 6 is evenly transferred to the sealing surface of the first sealer 11 and the first welding cutter 12.

[0033] Reference Figure 2 and Figure 4 The first welding cutter 12 is elastically connected to the first sealer 11 through an elastic connecting member 13; the elastic connecting member 13 is disposed in the slide groove 111; the first welding cutter 12 is provided with an oval limiting hole 121, and the slide groove 111 is provided with a limiting screw 14 adapted to the oval limiting hole 121, and the limiting screw 14 is slidably connected in the oval limiting hole 121; the cooperation between the oval limiting hole 121 and the limiting screw 14 restricts the sliding stroke of the first welding cutter 12 and prevents it from falling out of the slide groove 111.

[0034] Reference Figure 5 The second sealing assembly 2 includes a second sealer 21 and a second welding cutter 22. The sealing surface of the second sealer 21 has a mounting groove 211 along its length for fitting the second welding cutter 22. The second welding cutter 22 is fixed in the mounting groove 211 by fastening bolts. The second sealer 21 has insertion holes 5 arranged along its length for placing the heating unit 6. The insertion holes 5 on the second sealer 21 are symmetrically arranged on both sides of the mounting groove 211 to ensure that the heat generated by the heating unit 6 is evenly transferred to the sealing surface of the second sealer 21 and the second welding cutter 22.

[0035] Reference Figures 6 to 7Both the first seal 11 and the second seal 21 are equipped with heating units 6 inside. The heating units 6 are used to heat the sealing surfaces of the corresponding seals and to heat the first melting cutter 12 and the second melting cutter 22 through heat conduction, so that the first melting cutter 12 and the second melting cutter 22 have a heat-melting function. In this embodiment, the heating unit 6 is in the form of an electric heating tube, and the insertion hole 5 is a blind hole structure extending along the length of the seal. After the electric heating tube is inserted, it is connected to an external power source through a wire. The sealing surfaces of the first seal 11 and the second seal 21 are serrated surface structures that can interlock with each other. It should be noted that in other embodiments of this application, the heating unit 6 can also be provided inside only one of the first seal 11 and the second seal 21. The other seal and the melting cutter can obtain sufficient heat through the contact heat transfer between the first seal 11 and the second seal 21 in the pressed state and the large-area contact heat transfer between the melting cutter and the sliding mating surface of the corresponding seal, so that the melting cutter on the other side can also have a heat-melting function. This implementation method has certain advantages in reducing energy consumption and simplifying wiring.

[0036] Reference Figures 6 to 7 In this embodiment, the first melting and cutting blade 12 is made of copper alloy with a chromium-plated layer, which has a thermal conductivity of 380 W / m·K and a surface roughness Ra of 0.2-0.4μm, possessing efficient thermal conductivity and excellent anti-sticking performance; the second melting and cutting blade 22 is made of high-speed tool steel, which can withstand temperatures up to 450℃ and maintains sharpness well; the first sealer 11 and the second sealer 21 are both made of food-grade stainless steel 304, which can withstand temperatures up to 260℃ and possesses good corrosion resistance and structural stability; the sliding surface of the first melting and cutting blade 12 is coated with polytetrafluoroethylene, which has a coefficient of friction of 0.04~0.1, which can effectively reduce sliding resistance and prevent molten plastic from sticking together.

[0037] Reference Figures 6 to 7The elastic connecting member 13 includes a connector 131 and an elastic element 132. The upper end face of the connector 131 is provided with a snap-fit ​​groove 1311 for the first welding cutter 12. The snap-fit ​​groove 1311 and the first welding cutter 12 can be assembled with an interference fit, thus fixing the first welding cutter 12 in the snap-fit ​​groove 1311. The lower end face of the connector 131 is provided with a stud 1312. Similarly, the stud 1312 can be assembled with an interference fit in the insertion hole on the lower end face of the connector 131. An adjusting sleeve 133 is threaded onto the stud 1312. The bottom of the sliding groove 111 is provided with a clearance hole for the adjusting sleeve 133 to pass through, and the first crossbeam 3 is provided with a fitting adapted to the elastic element 132. The receiving groove 33; the elastic element 132 is sleeved on the stud 1312 and placed between the bottom of the receiving groove 33 and the adjusting sleeve 133. During the relative pressing process of the first seal 11 and the second seal 21, the first melting and cutting blade 12 contacts the packaging film before the sealing surface of the first seal 11 under the pre-tightening force of the elastic connecting member 13. The pre-compression amount of the elastic element 132 can be adjusted by rotating the adjusting sleeve 133 to set the critical back pressure value for the retraction of the first melting and cutting blade 12. The connector 131 is made of polyimide heat insulation material to prevent the heat of the melting and cutting blade from being transferred to the elastic element 132.

[0038] Reference Figures 6 to 7 The end face of the first crossbeam 3 that is assembled with the first sealing assembly 1 is provided with spaced support platforms 31; the bottom end of the first sealing assembly 1 abuts against the support platform 31, and a heat blocking groove 32 is formed between adjacent support platforms 31; the heat blocking groove 32 is used to reduce the contact area between the first sealing assembly 1 and the first crossbeam 3 to reduce heat conduction.

[0039] Reference Figures 6 to 7 An accommodating groove 33 for a positioning elastic element 132 is provided between adjacent support platforms 31, so that the adjusting sleeve 133 is exposed in the heat-blocking groove 32, and the width of the heat-blocking groove 32 is configured to allow an external adjusting tool to be inserted and rotated.

[0040] The implementation principle of this embodiment is as follows: During operation, the heating unit 6 is energized and generates heat. The heat is conducted to the sealing surface through the insertion holes 5 of the first sealer 11 and the second sealer 21. Simultaneously, the heat is efficiently transferred to the first and second sealers 12 and 22 through the contact and adhesion between the sliding surface of the first melting cutter 12 and the groove wall of the slide groove 111, enabling both to have a thermal melting function. After the packaging film enters the sealing area, the first sealing assembly 1 and the second sealing assembly 2 approach each other under the reciprocating rotational motion. During the relative pressing process of the first sealer 11 and the second sealer 21, the first melting cutter 12, under the pre-tightening force of the elastic element 132, contacts the packaging film before the sealing surface of the first sealer 11, and melts the packaging film using high temperature. As the pressing continues, the sealing surfaces of the first sealer 11 and the second sealer 21 gradually press the packaging film together. At this time, the cutting force borne by the first melting blade 12 gradually increases. When it exceeds the pre-tightening force of the elastic element 132, the elastic element 132 is compressed, and the first melting blade 12 slides back along the groove 111 in a direction away from the second melting blade 22, so as to smoothly transfer the subsequently applied system pressure to the sealing area between the first sealer 11 and the second sealer 21, thereby achieving pressure decoupling of melting and sealing in the same time zone. Example 2

[0041] Reference Figures 8 to 9 The difference between this embodiment and Embodiment 1 is that a thermally conductive lubricating layer 122 is provided on the sliding mating surface of the first melting and cutting blade 12. The thermally conductive lubricating layer 122 is any one of a graphite filler layer, a composite lubricating layer treated with polytetrafluoroethylene, or a copper-based self-lubricating composite material layer. A receiving groove 123 is provided on the surface of the first melting and cutting blade 12. The receiving groove 123 is arranged circumferentially along the thermally conductive lubricating layer 122 and is used to collect the powder generated by the wear of the thermally conductive lubricating layer 122.

[0042] Reference Figures 8 to 9 In this embodiment, the thermally conductive lubricating layer 122 is coated or embedded on the contact surface between the first welding cutter 12 and the slide groove 111. During the elastic sliding process, the thermally conductive lubricating layer 122 provides lubrication while transferring the heat of the first sealer 11 to the first welding cutter 12 through the contact surface, thereby enhancing the thermal coupling effect.

[0043] The implementation principle of this embodiment is as follows: During the high-frequency reciprocating sliding of the first melting and cutting blade 12 along the slide groove 111, the thermally conductive lubricating layer 122 effectively reduces the sliding friction resistance, ensures the sensitivity of elastic retraction, and avoids pressure decoupling failure due to friction jamming; at the same time, the thermally conductive lubricating layer 122 has good thermal conductivity, further improving the heat transfer efficiency from the heating unit 6 to the first melting and cutting blade 12 via the first sealer 11; during long-term use, the powder particles generated by the gradual wear of the thermally conductive lubricating layer 122 are received and collected by the retention groove 123, preventing powder from falling into the packaging sealing area and contaminating the packaging contents. The retention groove 123 is arranged circumferentially along the thermally conductive lubricating layer 122, forming a physical isolation barrier to ensure the cleanliness of the sealing area. Example 3

[0044] Reference Figure 10 The difference between this embodiment and Embodiment 1 is that both the first sealing component 1 and the second sealing component 2 adopt an elastic connection structure. That is, the first melting and cutting blade 12 is elastically connected to the first sealer 11 through the first elastic connecting member, and the second melting and cutting blade 22 is elastically connected to the second sealer 21 through the second elastic connecting member. During the relative pressing process of the first sealer 11 and the second sealer 21, the first melting and cutting blade 12 contacts the packaging film before the sealing surface of the first sealer 11 under the pre-tightening force of the corresponding elastic connecting member, and the second melting and cutting blade 22 contacts the packaging film before the sealing surface of the second sealer 21 under the pre-tightening force of the corresponding elastic connecting member.

[0045] In this embodiment, the structures of the first seal 11 and the second seal 21 are both as described in Embodiment 1, i.e., both have a groove 111 in the middle of their sealing surfaces, and the elastic connecting member 13 is disposed in the corresponding groove 111. Correspondingly, the first crossbeam 3 and the second crossbeam 4 are both provided with a support platform 31 and a heat-blocking groove 32 as described in Embodiment 1. The heating unit 6 can be disposed inside one or both of the first seal 11 and the second seal 21. When the heating unit 6 is disposed on only one side, the melting and cutting blade on the other side obtains heat through contact heat transfer between the seals and the contact heat transfer between the melting and cutting blade and the sliding mating surface of the seal.

[0046] The implementation principle of this embodiment is basically the same as that of Embodiment 1, except that both sides adopt an elastic sliding structure, and the melting and cutting force is absorbed and released by the elastic elements 132 on both sides. After the packaging film enters the sealing area, the first melting and cutting blade 12 and the second melting and cutting blade 22, under their respective pre-tightening forces, contact the packaging film before the corresponding sealing surface and simultaneously perform heat melting and cutting from both sides. As the pressing continues, when the melting and cutting force borne by the melting and cutting blades on both sides exceeds the pre-tightening force of their respective elastic elements 132, the melting and cutting blades on both sides simultaneously retract in a direction away from each other, smoothly transferring the system pressure between the sealing surfaces of the first sealer 11 and the second sealer 21. This double-sided elastic connection scheme is suitable for scenarios with a wider sealing area or higher requirements for sealing pressure uniformity, and can further reduce the load on the single-sided elastic structure and extend the service life of the elastic elements.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this application.

Claims

1. An elastic sealing device for a rotary reciprocating horizontal sealing mechanism, comprising a first sealing assembly (1) and a second sealing assembly (2) disposed opposite to each other, characterized in that, The first sealing assembly (1) includes a first sealer (11) and a first welding cutter (12); the second sealing assembly (2) includes a second sealer (21) and a second welding cutter (22). At least one of the first seal (11) and the second seal (21) is provided with a heating unit (6). The heating unit (6) is used to heat the sealing surface of the corresponding seal and to heat the first melting cutter (12) and / or the second melting cutter (22) through heat conduction, so that the first melting cutter (12) and / or the second melting cutter (22) have a heat melting function. Wherein, the first melting and cutting blade (12) is elastically connected to the first sealer (11) through the elastic connecting member (13) so as to allow the first melting and cutting blade (12) to generate elastic sliding displacement relative to the first sealer (11) when bearing melting and cutting force, and / or the second melting and cutting blade (22) is elastically connected to the second sealer (21) through the elastic connecting member (13) so as to allow the second melting and cutting blade (22) to generate elastic sliding displacement relative to the second sealer (21) when bearing melting and cutting force; and during the process of the first sealer (11) and the second sealer (21) being pressed together, the first melting and cutting blade (12) contacts the packaging film before the sealing surface of the first sealer (11) under the pre-tightening force of the elastic connecting member (13), and / or the second melting and cutting blade (22) contacts the packaging film before the sealing surface of the second sealer (21) under the pre-tightening force of the elastic connecting member (13).

2. The elastic melting and cutting device for a rotary reciprocating horizontal sealing mechanism according to claim 1, characterized in that, The first melting and cutting blade (12) is elastically connected to the first sealer (11) through the elastic connecting member (13), and during the process of the first sealer (11) and the second sealer (21) being pressed together, the first melting and cutting blade (12) contacts the packaging film before the sealing surface of the first sealer (11) under the pre-tightening force of the elastic connecting member (13); the second melting and cutting blade (22) is rigidly fixedly connected to the second sealer (21).

3. The elastic melting and cutting device for a rotary reciprocating horizontal sealing mechanism according to claim 2, characterized in that, The sealing surface of the first sealer (11) is provided with a groove (111) adapted to the first melting cutter (12) along the length direction in the middle of the sealing surface. The first melting cutter (12) is slidably connected in the groove (111), and the sliding surface of the first melting cutter (12) abuts against the groove wall surface of the groove (111). The elastic connecting member (13) is provided in the groove (111). The sealing surface of the second sealer (21) is provided with a mounting groove (211) adapted to the second melting cutter (22) along the length direction in the middle of the sealing surface. The second melting cutter (22) is fixed in the mounting groove (211).

4. The elastic melting and cutting device for a rotary reciprocating horizontal sealing mechanism according to claim 3, characterized in that, Both the first seal (11) and the second seal (21) are provided with insertion holes (5) arranged along the length direction. The insertion holes (5) are used to place the heating unit (6). The insertion holes (5) on the first seal (11) are symmetrically arranged on both sides of the slide groove (111) so that the heat generated by the heating unit (6) is evenly transferred to the sealing surface of the first seal (11) and the first melting and cutting blade (12). The insertion holes (5) on the second seal (21) are symmetrically arranged on both sides of the mounting groove (211) so that the heat generated by the heating unit (6) is evenly transferred to the sealing surface of the second seal (21) and the second melting and cutting blade (22).

5. The elastic melting and cutting device for a rotary reciprocating horizontal sealing mechanism according to claim 3, characterized in that, The first melting and cutting blade (12) is provided with an oval limiting hole (121), and the sliding groove (111) is provided with a limiting screw (14) that is adapted to the oval limiting hole (121). The limiting screw (14) is slidably connected in the oval limiting hole (121).

6. The elastic melting and cutting device for a rotary reciprocating horizontal sealing mechanism according to claim 3, characterized in that, It also includes a first crossbeam (3) and a second crossbeam (4), the first sealing component (1) is detachably connected to the first crossbeam (3), and the second sealing component (2) is detachably connected to the second crossbeam (4); the end face of the first crossbeam (3) where it is assembled with the first sealing component (1) is provided with spaced support platforms (31); the bottom end of the first sealing component (1) abuts against the support platform (31), and a heat-blocking groove (32) is formed between adjacent support platforms (31); the heat-blocking groove (32) is used to reduce the contact area between the first sealing component (1) and the first crossbeam (3) to reduce heat conduction, and the heat-blocking groove (32) forms a clearance space for the elastic connecting member (13) to perform adjustment operations.

7. The elastic melting and cutting device for a rotary reciprocating horizontal sealing mechanism according to claim 6, characterized in that, The elastic connecting member (13) includes a connector (131) and an elastic element (132); the upper end face of the connector (131) is provided with a snap-fit ​​groove (1311) for the first welding cutter (12) or the second welding cutter (22), and the lower end face of the connector (131) is provided with a stud (1312), and an adjusting sleeve (133) is threaded onto the stud (1312); the bottom of the groove (111) is provided with a clearance hole for the adjusting sleeve (133) to pass through, and the first crossbeam (3) is provided with a receiving groove (33) adapted to the elastic element (132); the elastic element (132) is sleeved on the stud (1312) and placed between the bottom of the receiving groove (33) and the adjusting sleeve (133).

8. The elastic melting and cutting device for a rotary reciprocating horizontal sealing mechanism according to claim 7, characterized in that, The receiving groove (33) is located between adjacent support platforms (31), the adjusting sleeve (133) is exposed in the heat-blocking groove (32), and the width of the heat-blocking groove (32) is configured to allow an external adjusting tool to extend into and rotate the adjusting sleeve (133).

9. The elastic melting and cutting device for a rotary reciprocating horizontal sealing mechanism according to claim 7, characterized in that, The connector (131) is made of heat-insulating material.

10. The elastic welding and cutting device for a rotary reciprocating horizontal sealing mechanism according to claim 1, characterized in that, A thermally conductive lubricating layer (122) is provided on the sliding mating surface of the first melting cutter (12) or the second melting cutter (22). The thermally conductive lubricating layer (122) is any one of a graphite filler layer, a composite lubricating layer treated with polytetrafluoroethylene, or a copper-based self-lubricating composite material layer. A receiving groove (123) is provided on the surface of the first melting cutter (12) or the second melting cutter (22). The receiving groove (123) is arranged along the circumference of the thermally conductive lubricating layer (122) and is used to collect the powder generated by the wear of the thermally conductive lubricating layer (122).

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