Heat sealing device and heat sealing method

Abstract

The present invention relates to the field of packaging technology, and provides a heat sealing device and a heat sealing method. The heat sealing device includes: a supporting mechanism, including a compression sleeve; a cup holder assembly, including a template and a support holder, the template is provided with a through hole, the support holder is a ring structure and is coaxially arranged with the through hole, one end of the support holder is connected to the template in the axial direction, and the opening of the other end can be expanded or reduced, and is used to support the cup edge of the cup body to be heat sealed; the cup holder assembly can be moved to the top of the supporting mechanism, and move in the vertical direction to release the cup body into the compression sleeve; the heat sealing mechanism is located above the supporting mechanism, including a hot pressing piece, the hot pressing piece is correspondingly arranged with the compression sleeve, and the cup edge of the cup body can be pressed between the top of the compression sleeve and the hot pressing piece. The heat sealing device. The cup holder assembly of the heat sealing device can adapt to cup bodies of different sizes and specifications, without the need to replace the template and the support holder, which greatly shortens the disassembly and assembly time of the device and reduces the cost and management difficulty of the template.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging, and in particular to a heat sealing device and a heat sealing method. Background Art

[0002] Currently, in the production of cup-type foods, a heat-sealing device is usually used to press and seal a heat-sealing film to the cup rim, so that the interior space of the cup body is isolated from the outside world and the hygienic quality of the product is ensured.

[0003] The heat-sealing mechanism is located above the heat-sealing device, with the cups to be heat-sealed supported by a template. After food is filled, the template moves the cups beneath the heat-sealing mechanism, where the multiple heat-sealing heads move downward to press against the template. The heat-sealing film and the cup rim are pressed tightly between the heat-sealing mechanism and the template. The high-temperature heat-sealing heads melt the lower-temperature film beneath the heat-sealing film, causing the annular area of ​​the cup rim to bond with the melted low-temperature film, thus sealing the multiple cups.

[0004] However, because different cup sizes require corresponding templates, heat-sealing cups of varying sizes requires replacing the corresponding templates. The larger the product volume, the more templates need to be replaced, and the time-consuming assembly and disassembly of the templates affects production efficiency, increasing procurement costs and management complexity. Summary of the Invention

[0005] The present invention provides a heat sealing device and a heat sealing method, which are used to solve the problem in the prior art that the heat sealing device needs to replace different molds according to the size specifications of the product, resulting in low production efficiency, high mold costs and great management difficulty.

[0006] The present invention provides a heat sealing device, comprising:

[0007] A supporting mechanism including a compression sleeve;

[0008] The cup holder assembly includes a template and a support bracket. The template is provided with a through hole. The support bracket is an annular structure and is arranged coaxially with the through hole. One end of the support bracket is connected to the template in the axial direction, and the opening of the other end can be expanded or contracted to support the rim of the cup body to be heat-sealed. The cup holder assembly can move above the support mechanism and move in the vertical direction to release the cup body into the compression sleeve.

[0009] The heat sealing mechanism is located above the supporting mechanism and includes a heat pressing piece. The heat pressing piece is correspondingly arranged with the compression sleeve. The cup edge of the cup body can be compressed between the top end of the compression sleeve and the heat pressing piece.

[0010] According to a heat sealing device provided by the present invention, the support bracket includes: a connecting part and a plurality of elastic fingers, the connecting part is connected to the template, the plurality of elastic fingers are arranged at intervals along the circumference of the connecting part, the elastic fingers are inclined from one end of the connecting part toward the axis of the connecting part, the elastic fingers can be squeezed to change the inclination angle, and the end of the elastic finger away from the connecting part is used to support the cup edge of the cup body.

[0011] According to a heat sealing device provided by the present invention, the cup holder assembly further comprises: a fixing ring and an adjusting ring, the fixing ring, the adjusting ring and the through hole being coaxially arranged, the fixing ring being fixedly connected to the template, the adjusting ring being located on the inner side of the fixing ring, and the connecting portion being located between the fixing ring and the adjusting ring;

[0012] The fixing ring is provided with a first annular flange extending inwardly, and the elastic finger is located between the end of the adjustment ring and the first annular flange. The position of the adjustment ring relative to the fixing ring in its axial direction is adjustable, so that the elastic finger is deformed to change the tilt angle.

[0013] According to a heat sealing device provided by the present invention, the supporting mechanism also includes: a top plate and an elastic member, the top plate is located in the compression sleeve and is used to support the cup body; the top plate is connected to the bottom of the compression sleeve through the elastic member, so that the cup edge of the cup body can be separated from the top of the compression sleeve under the action of the elastic member.

[0014] According to a heat sealing device provided by the present invention, the supporting mechanism further includes: a driving member and a support beam, a plurality of the compression sleeves are installed on the support beam, and the driving end of the driving member is connected to the support beam for driving the support beam to move toward the hot pressing member.

[0015] According to a heat sealing device provided by the present invention, the heat sealing mechanism further includes: a bracket and a suspension beam, the suspension beam is installed on the bracket, a plurality of the hot pressing parts are fixed below the suspension beam, and the template is correspondingly provided with a plurality of the through holes; the supporting mechanism further includes a support beam, and a plurality of the compression sleeves are correspondingly installed on the support beam.

[0016] According to a heat sealing device provided by the present invention, the heat sealing mechanism also includes: multiple adjustment components, the adjustment components include a screw rod, a nut and a clamp, the screw rod is vertically passed through the bracket, the suspension beam is fixed to the lower end of the screw rod, the nut is threadedly connected to the screw rod, the clamp is openably and closably clamped to the screw rod, and the bracket is limited to be located between the nut and the clamp.

[0017] According to a heat sealing device provided by the present invention, the clamp includes: a first holding part, a second holding part and a fixing part, the first holding part and the second holding part are held on both sides of the screw rod and locked by the fixing part, and the inner side surfaces of the first holding part and the second holding part are provided with threads that match the external threads of the screw rod.

[0018] According to a heat sealing device provided by the present invention, the heat pressing member comprises:

[0019] A heating seat plate, a pressure block and a connecting column, wherein a heating element is provided in the heating seat plate, the heating seat plate and the suspension beam are spaced apart, the heating seat plate is fixedly connected to the suspension beam through the connecting column, and the pressure block is installed on the lower surface of the heating seat plate and is thermally connected to the heating seat plate.

[0020] The present invention also provides a heat sealing method for use with any of the above heat sealing devices, comprising the steps of:

[0021] Place the cup body to be heat-sealed on the cup holder assembly so that the rim of the cup body is supported by the support holder. After the cup body is filled, cover the cup body with a heat-sealing film;

[0022] Controlling the compression sleeve to move downward to a first position, controlling the cup holder assembly to translate to above the supporting mechanism, and then controlling the compression sleeve to move upward so that the cup body is supported in the compression sleeve;

[0023] Controlling the compression sleeve to move upward to a second position so that the cup edge and the heat-sealing film of the cup body are pressed tightly between the top end of the compression sleeve and the heat-pressing member;

[0024] The compression sleeve is controlled to move downward so that the cup edge of the cup body is supported on the support bracket again.

[0025] The heat-sealing device and method provided by the present invention utilize a support bracket with an expandable or contractible opening on a template. This support bracket can support the rims of cups of varying sizes, making the cup holder assembly adaptable to cups of varying sizes and specifications, thereby improving the versatility of the cup holder assembly. When sealing cups of varying sizes, the template and support bracket do not need to be replaced; only the compression sleeve on the support mechanism needs to be replaced. This significantly shortens assembly and disassembly time, improves production efficiency, and reduces template costs and management complexity. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is one of the structural diagrams of the heat sealing device provided by the present invention

[0028] Figure 2 This is the second structural schematic diagram of the heat sealing device provided by the present invention.

[0029] Figure 3 It is a schematic diagram of the positional relationship between the compression sleeve and the cup holder assembly in the heat sealing device provided by the present invention.

[0030] Figure 4 It is a structural schematic diagram of the support bracket in the heat sealing device provided by the present invention.

[0031] Figure 5 It is a schematic structural diagram of the clamp in the heat sealing device provided by the present invention.

[0032] Reference numerals:

[0033] 1. Support mechanism; 11. Compression sleeve; 12. Top plate; 13. Elastic member; 14. Positioning column; 15. Support beam; 16. Driving member; 2. Cup holder assembly; 21. Template; 22. Support bracket; 221. Connecting portion; 222. Elastic finger; 23. Fixing ring; 231. First annular flange; 232. First ring body; 233. Inner chamfer; 24. Adjusting ring; 241. Second ring body; 242. Second annular flange; 3. Heat sealer Structure; 31. Hot pressing part; 311. Heating seat plate; 3111. Heating element; 312. Pressing block; 32. Bracket; 321. Pillar; 322. Crossbeam; 33. Suspension beam; 34. Adjustment assembly; 341. Screw rod; 342. Nut; 343. Clamp; 3430. Thread; 3431. First holding part; 3432. Second holding part; 3433. Fixing part; 35. Cylinder; 4. Cup body; 41. Cup rim; 5. Heat-sealing film. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "first" and "second" are numbered for the purpose of clearly illustrating the product components and do not represent any substantial difference. The directions of "up", "down", "left" and "right" shall be based on the directions shown in the accompanying drawings. The terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances. In addition, "multiple" means two or more. "And / or" in the specification and claims means at least one of the connected objects, and the character " / " generally indicates that the related objects before and after are in an "or" relationship.

[0036] The following combination Figure 1-Figure 5 The heat sealing device and heat sealing method of the present invention are described.

[0037] like Figure 1 and Figure 2 As shown, the heat sealing device provided by the embodiment of the present invention includes a supporting mechanism 1, a cup holder assembly 2 and a heat sealing mechanism 3. The supporting mechanism 1 includes a compression sleeve 11. The cup holder assembly 2 includes a template 21 and a support tray 22. The template 21 is provided with a through hole, and the support tray 22 is an annular structure and is coaxially arranged with the through hole. One end of the support tray 22 in the axial direction is connected to the template 21, and the opening at the other end can be expanded or reduced, and is used to support the cup rim 41 of the cup body 4 to be heat sealed. The cup holder assembly 2 can be moved to the top of the supporting mechanism 1, and move in the vertical direction to release the cup body 4 into the compression sleeve 11. The heat sealing mechanism 3 is located above the supporting mechanism 1. The heat sealing mechanism 3 includes a hot pressing piece 31, which is arranged corresponding to the compression sleeve 11, and the cup rim 41 of the cup body 4 can be pressed between the top of the compression sleeve 11 and the hot pressing piece 31.

[0038] In the heat-sealing device, the support mechanism 1 and the heat-sealing mechanism 3 are arranged at the heat-sealing station. The template 21 is provided with one or more through-holes, each of which houses a support 22 for supporting the cup body 4. The cup holder assembly 2 is used to move the filled cup body 4 to the heat-sealing station. After the support 22 of the cup holder assembly 2 is aligned with the compression sleeve 11 of the support mechanism 1, the cup body 4 is released into the compression sleeve 11. The support mechanism 1 and the heat-sealing mechanism 3 then move relative to each other in the vertical direction, pressing the rim 41 of the cup body 4 between the compression sleeve 11 and the heat-pressing element 31. The cup body 4 is then sealed by heating the heat-pressing element 31.

[0039] The template 21 is provided with a plurality of through holes, and a corresponding template 21 is provided with a plurality of support brackets 22, so that the cup holder assembly 2 can simultaneously support a plurality of cup bodies 4, and a single heat sealing operation can complete the sealing of a plurality of cup bodies, thereby improving production efficiency. Optionally, the plurality of through holes are arranged at intervals along a straight line. Figure 1 and Figure 2 The template 21 is provided with four transversely arranged through holes, so that one cup holder assembly 2 can support four cup bodies at the same time.

[0040] It is understood that the size of the opening at the end of the support bracket 22 away from the template 21 can be adjusted according to the size of the cup body 4, so that the cup rim 41 of the cup body 4 can be supported on the end of the support bracket 22 away from the template 21. The compression sleeve 11 is used to accommodate the cup body 4. The top end of the compression sleeve 11 is adapted to the size of the cup rim 41 of the cup body 4, and is used to support the cup body 4 and apply pressure to the cup rim 41 and the heat-sealing film 5.

[0041] The heat-sealing device provided in this embodiment of the present invention utilizes a support bracket 22 with an expandable or contractible opening on a template 21. This support bracket 22 can support the rims of cups 4 of varying sizes, enabling the cup holder assembly 2 to adapt to cups 4 of varying sizes and specifications, thereby enhancing the versatility of the cup holder assembly 2. When sealing cups 4 of varying sizes, there's no need to replace the template 21 and support bracket 22; only the compression sleeve 11 on the support mechanism 1 needs to be replaced. This significantly shortens assembly and disassembly time, improves production efficiency, and reduces the cost and management complexity of the template 21.

[0042] like Figure 4 As shown, in this embodiment of the present invention, the support bracket 22 includes a connecting portion 221 and a plurality of elastic fingers 222. The connecting portion 221 is connected to the template 21, and the plurality of elastic fingers 222 are spaced apart along the circumference of the connecting portion 221. The elastic fingers 222 are inclined from one end of the connecting portion 221 toward the axis of the connecting portion 221, and the elastic fingers 222 can be squeezed to change the angle of inclination. The end of the elastic fingers 222 away from the connecting portion 221 is used to support the cup rim 41 of the cup body 4.

[0043] The elastic fingers 222 are rigid, elastic components that possess both elastic deformation and resilience, while also being able to support the cup body 4. Optionally, the elastic fingers 222 and the connecting portion 221 are integrally formed. The elastic fingers 222 are thin sheets, with multiple elastic fingers 222 arranged to form a polygonal ring, thereby supporting and positioning the cup body 4.

[0044] When the elastic fingers 222 are squeezed inward by an external force, their tilt angle relative to the axis of the connecting portion 221 increases, causing the end of the elastic fingers 222 away from the connecting portion 221 to move radially inward, thereby narrowing the opening of the support bracket 22. In this case, other adjustment members can be used to apply an inward squeezing force to the elastic fingers 222. When the external force disappears, the elastic fingers 222 automatically return to their original tilt angle.

[0045] When the elastic finger 222 is squeezed outward by an external force, its inclination angle relative to the axis of the connecting portion 221 will become smaller, causing the end of the elastic finger 222 away from the connecting portion 221 to move radially outward, thereby expanding the opening of the support bracket 22. In this case, other adjusting parts can also be used to apply an outward squeezing force to the elastic finger 222. Alternatively, the elastic finger 222 can achieve the expansion of the opening with the help of the cup body 4 itself. Since the upper end size of some cup bodies 4 is larger than the lower end size, as long as the opening size formed by the multiple elastic fingers 222 in the natural state is appropriate, it can adapt to cup bodies 4 of various sizes without the help of other adjusting parts. At this time, the external force exerted on the elastic finger 222 is the squeezing force exerted outward by the cup body 4 itself. When the external force disappears, the elastic finger 222 automatically returns to its natural state with the original inclination angle.

[0046] like Figure 3 As shown, in this embodiment of the present invention, the cup holder assembly 2 further includes a fixed ring 23 and an adjustment ring 24. The fixed ring 23, the adjustment ring 24, and the through-hole are coaxially arranged. The fixed ring 23 and the adjustment ring 24 cooperate to form the adjustment member described in the above-mentioned embodiment. The fixed ring 23 is fixedly connected to the template 21, the adjustment ring 24 is located on the inner side of the fixed ring 23, and the connecting portion 221 is located between the fixed ring 23 and the adjustment ring 24. The fixed ring 23 is provided with a first annular flange 231 extending inward, and the elastic finger 222 is located between the end of the adjustment ring 24 and the first annular flange 231. The position of the adjustment ring 24 in its axial direction relative to the fixed ring 23 is adjustable, causing the elastic finger 222 to deform to change the tilt angle.

[0047] Specifically, the retaining ring 23 includes a first ring body 232, and a first annular flange 231 protruding from the inner side of the first ring body 232. The first ring body 232 is a cylindrical structure that is fixedly connected to the wall of the through hole. Optionally, the first annular flange 231 is located at the upper end of the first ring body 232. The first annular flange 231 and the first ring body 232 are integrally formed.

[0048] The adjustment ring 24 includes a second ring body 241 and a second annular flange 242. The second ring body 241 is a cylindrical structure and is spaced apart from the first ring body 232. The second annular flange 242 protrudes from the outer side of the second ring body 241 and is located at the lower end of the second ring body 241. The outer edge of the second annular flange 242 is slidably connected to the first ring body 232. The second annular flange 242 and the second ring body 241 are integrally formed.

[0049] The connecting portion 221 is located between the first ring body 232 and the second ring body 241 and is supported by the second annular flange 242. The top of the first ring body 232 is located below the first annular flange 231 and is staggered with respect to the first annular flange 231. An extrusion space is formed between the top of the first ring body 232 and the first annular flange 231, and the elastic fingers 222 are located within this extrusion space.

[0050] When the adjustment ring 24 moves upward relative to the fixed ring 23, the elastic fingers 222 are squeezed by the top of the adjustment ring 24 and the first annular flange 231, causing their angle of inclination toward the axis of the connecting portion 221 to increase, thereby reducing the opening size of the support bracket 22. When the adjustment ring 24 moves downward relative to the fixed ring 23, the elastic fingers 222 return to their natural state.

[0051] Optionally, an inner chamfer 233 is formed between the side of the first annular flange 231 facing the lower end of the first ring body 232 and the inner wall of the first ring body 232. In this way, the size of the opening of the support bracket 22 can be finely adjusted.

[0052] In this embodiment of the present invention, the cup holder assembly 2 further includes a positioning member (not shown). One of the fixed ring 23 and the adjustable ring 24 is axially defined with a plurality of first mounting holes, while the other is defined with a second mounting hole. The fixed ring 23 is mounted to the adjustable ring via a positioning member that penetrates either the first or second mounting holes.

[0053] Specifically, the fixing ring 23 is provided with a plurality of first mounting holes spaced axially, and the adjustment ring 24 is provided with a second mounting hole. Alternatively, the adjustment ring 24 is provided with a plurality of first mounting holes spaced axially, and the fixing ring 23 is provided with a second mounting hole. By adjusting the alignment of the different first mounting holes with the second mounting holes and then securing the fixing ring 23 and the adjustment ring 24 with a positioning member, the axial position of the adjustment ring 24 relative to the fixing ring 23 can be adjusted, thereby adjusting the size of the opening of the support bracket 22.

[0054] In this embodiment of the present invention, the support mechanism 1 further includes a top plate 12 and an elastic member 13. The top plate 12 is positioned within the compression sleeve 11 and is used to support the cup body 4. The top plate 12 is connected to the bottom of the compression sleeve 11 via the elastic member 13, allowing the rim 41 of the cup body 4 to separate from the top of the compression sleeve 11 under the action of the elastic member 13. The elastic member 13 may be a spring, a shrapnel, or other elastic member.

[0055] When the cup holder assembly 2 releases the cup body 4 into the compression sleeve 11, due to the presence of the elastic member 13, the cup rim 41 of the cup body 4 does not contact the top of the compression sleeve 11, but there is a certain distance between them, see Figure 1 When the compression sleeve 11 and the hot pressing piece 31 are close to each other, the elastic force of the elastic piece 13 is overcome, so that the cup edge 41 of the cup body 4 is pressed between the compression sleeve 11 and the hot pressing piece 31. Figure 2 .

[0056] After heat sealing, the compression sleeve 11 and the heat-pressing member 31 separate, and the cup rim 41 of the cup body 4 separates from the top of the compression sleeve 11 under the action of the elastic member 13, preventing the cup body 4 from locking with the compression sleeve 11. Furthermore, after heat sealing, the cup holder assembly 2 needs to move upward to re-support the cup body 4 and remove it. In this embodiment, the elastic member 13 separates the cup rim 41 from the compression sleeve 11, allowing the support bracket 22 to smoothly receive the cup rim 41 when it moves upward. In this embodiment, the width of the top of the compression sleeve 11 can be set to be greater than or equal to the width of the cup rim 41, which helps to increase the heat-sealing area between the heat-sealing film 5 and the cup rim 41, thereby improving the sealing effect.

[0057] Specifically, a positioning post 14 is provided at the bottom of the compression sleeve 11. The elastic member 13 is a spring, a portion of which is sleeved on the positioning post 14. The lower end of the spring is fixedly connected to the positioning post 14, and the upper end is fixedly connected to the top plate 12.

[0058] Furthermore, the support mechanism 1 includes a support beam 15, to which the compression sleeve 11 is mounted. Multiple compression sleeves 11 can be mounted on the support beam 15, corresponding one-to-one with the multiple support brackets 22 on the cup holder assembly 2. Optionally, multiple positioning posts 14 are fixed to the support beam 15, onto which the compression sleeve 11 is mounted. The positioning posts 14 facilitate installation and positioning of the compression sleeve 11, facilitating assembly and disassembly of the compression sleeve 11.

[0059] In an embodiment of the present invention, the supporting mechanism 1 further includes a driving member 16, the driving end of the driving member 16 is connected to the compression sleeve 11, and is used to drive the compression sleeve 11 to move toward the hot pressing member 31. The driving member 16 can be a linear driving member such as a linear cylinder or a hydraulic cylinder. Specifically, a plurality of compression sleeves 11 are installed on the support beam 15, and the driving end of the driving member 16 is connected to the support beam 15, and is used to drive the support beam 15 to move toward the hot pressing member 31. The driving member 16 simultaneously drives the plurality of compression sleeves 11 on the support beam 15 upward to cooperate with the plurality of hot pressing members 31, thereby realizing the sealing of the plurality of cup bodies 4.

[0060] In a conventional sealing device, multiple hot-pressing elements 31 are guided downward by a guide and positioning structure to press together the template, achieving heat-pressing sealing of multiple cups. However, because the template is a thin, easily deformed plate, the guide and positioning structure can cause gap deviations in the heat-sealing area, resulting in an incomplete and loose seal.

[0061] In the embodiment of the present invention, the hot pressing part 31 remains stationary, and the support beam 15 is driven to move upward by the driving part 16, thereby driving multiple compression sleeves 11 to cooperate with multiple hot pressing parts 31 to realize hot pressing sealing of multiple cup bodies 4. The problem of uneven sealing surface caused by deformation of the template 21 can be avoided. Since there is no need for a guide positioning structure, the gap deviation problem caused by the guide positioning structure can also be avoided, thereby improving the integrity and tightness of the heat seal.

[0062] In this embodiment of the present invention, the heat sealing mechanism 3 further includes a bracket 32 ​​and a suspension beam 33. The suspension beam 33 is mounted on the bracket 32, and multiple hot pressing members 31 are fixed below the suspension beam 33. The template 21 is provided with multiple corresponding through holes. The support mechanism 1 further includes a support beam 15, on which multiple compression sleeves 11 are mounted.

[0063] The suspension beam 33 can be mounted on the bracket 32 ​​via a linear drive member such as a cylinder 35 or a hydraulic cylinder to adjust the vertical height of the suspension beam 33. When the compression sleeve 11 needs to be replaced, the suspension beam 33 can be moved upward by the drive member to facilitate the replacement operation.

[0064] Specifically, the bracket 32 ​​includes two pillars 321 and a crossbeam 322. The two pillars 321 are located on either side of the supporting mechanism 1. The crossbeam 322 is connected between the two pillars 321 and is located above the supporting mechanism 1. The suspension beam 33 is installed below the crossbeam 322. Multiple hot-pressed parts 31 are fixed below the suspension beam 33, integrating the multiple hot-pressed parts 31 into an integral structure.

[0065] Optionally, the support 321 is provided with an external thread and is threaded with two nuts. The support 321 is passed through the crossbeam 322, and the two nuts are provided on both sides of the crossbeam 322 to clamp the crossbeam 322. In this way, a detachable connection is achieved between the crossbeam 322 and the support 321, and the height and level of the crossbeam 322 can be adjusted by the nuts.

[0066] In some optional embodiments, the suspension beam 33 is stationary, and the driving member drives the support beam 15 upward to perform sealing, that is, the hot pressing sealing is achieved by moving the compression sleeve 11 toward the hot pressing member 31.

[0067] In this embodiment of the present invention, the hot press 31 includes a heating plate 311, a pressing block 312, and a connecting column (not shown). A heating element 3111 is disposed within the heating plate 311. The heating plate 311 is spaced apart from the suspension beam 33 and is fixedly connected to the suspension beam 33 via the connecting column. The pressing block 312 is mounted on the lower surface of the heating plate 311 and is thermally connected to the heating plate 311.

[0068] The heating element 3111 can be an electric heating tube embedded within the heating base plate 311. The cross-sectional dimensions of the connecting column are much smaller than the dimension of the side of the heating base plate 311 facing the suspension beam 33. The connecting column secures the heating base plate 311 to the suspension beam 33 and maintains a certain distance between the heating base plate 311 and the suspension beam 33, preventing the temperature of the heating base plate 311 from transferring upward. The temperature of the heating base plate 311 is transmitted to the pressing block 312 below, ensuring a uniform temperature distribution throughout the pressing block 312.

[0069] Optionally, the pressing block 312 can be detachably mounted on the heating base plate 311, for example, by fixing the pressing block 312 and the heating base plate 311 with countersunk bolts. The cup bodies 4 of different sizes can be adapted by replacing the pressing blocks 312 of different sizes.

[0070] like Figure 1 or Figure 2 As shown, in an optional embodiment, the heat sealing mechanism 3 further includes multiple adjustment assemblies 34. The adjustment assemblies 34 include a screw 341, a nut 342, and a clamp 343. The screw 341 extends vertically through the bracket 32, and the suspension beam 33 is fixed to the lower end of the screw 341. The nut 342 is threadedly connected to the screw 341, and the clamp 343 is openably and closably mounted on the screw 341. The bracket 32 ​​is positioned between the nut 342 and the clamp.

[0071] Specifically, a screw rod 341 extends vertically through the crossbeam 322 of the bracket 32. A nut 342 is positioned above the crossbeam 322, and a clamp 343 is positioned below the crossbeam 322. The crossbeam 322 is clamped between the nut 342 and the clamp 343. The nut 342 restricts downward movement of the screw rod 341 relative to the crossbeam 322, while the clamp 343 restricts upward movement of the screw rod 341 relative to the crossbeam 322. The two-way limiting action of the nut 342 and the clamp 343 ensures a secure fixation between the suspension beam 33 and the bracket 32.

[0072] The suspension beam 33 is connected to the crossbeam 322 via screws 341 of multiple adjustment assemblies 34. The levelness of the suspension beam 33, and thus the levelness of the multiple hot-pressed parts 31, can be adjusted by adjusting the position of the nuts 342 and clamps 343 of the adjustment assemblies 34 on the screws 341. During adjustment, the clamps 343 are opened to release the limit, and then the knob nuts 342 are used to adjust the position. Once the position is in place, the clamps 343 are closed to secure the parts. The openable and retractable design of the clamps 343 facilitates leveling.

[0073] Further, if Figure 5 As shown, the clamp 343 includes a first holding portion 3431, a second holding portion 3432, and a fixing member 3433. The first holding portion 3431 and the second holding portion 3432 hold the screw rod 341 on both sides and are locked by the fixing member 3433. The inner side surfaces of the first holding portion 3431 and the second holding portion 3432 are provided with threads 3430 that mate with the external threads of the screw rod 341.

[0074] Specifically, one end of the first holding portion 3431 is rotatably connected to one end of the second holding portion 3432. The fixing member 3433 is inserted through the other end of the first holding portion 3431 and the other end of the second holding portion 3432 to secure them. The threads of the first holding portion 3431 and the second holding portion 3432 cooperate with the external threads of the screw rod 341 to axially secure the clamp 343 and the screw rod 341.

[0075] The present invention also provides a heat sealing method for use with the heat sealing device described in any of the above embodiments. The heat sealing method includes the following steps:

[0076] Step S1 , placing the cup body 4 to be heat-sealed on the cup holder assembly 2 , with the rim 41 of the cup body 4 supported on the support 22 , and after the cup body 4 is filled, covering the cup body 4 with a heat-sealing film 5 .

[0077] Step S2 , controlling the compression sleeve 11 to move downward to the first position, controlling the cup holder assembly 2 to move horizontally to above the supporting mechanism 1 , and then controlling the compression sleeve 11 to move upward so that the cup body 4 is supported in the compression sleeve 11 .

[0078] Step S3 , controlling the compression sleeve 11 to move upward to the second position, so that the cup rim 41 of the cup body 4 and the heat-sealing film 5 are compressed between the top of the compression sleeve 11 and the heat-pressing member 31 .

[0079] Step S4 , controlling the compression sleeve 11 to move downward, so that the cup edge 41 of the cup body 4 is supported on the support bracket again.

[0080] After the cup body 4 is filled, the cup holder assembly 2 moves toward the supporting mechanism 1 while the pressing sleeve 11 is controlled to move downward to the first position. Specifically, the driving member 16 drives the support beam 15 downward, causing the pressing sleeve 11 to switch to the first position to avoid the cup holder assembly 2 moving horizontally. After the cup holder assembly 2 moves to the top of the supporting mechanism 1, the supporting mechanism 1 moves upward again. Figure 1 After moving up to a certain height, the compression sleeve 11 is passed through the support bracket 22 , and the support bracket 22 is located outside the compression sleeve 11 and expands accordingly. The cup body 4 is separated from the cup holder assembly 2 and is received by the compression sleeve 11 .

[0081] Continue to control the compression sleeve to move up to the second position, so that the cup rim 41 of the cup body 4 and the heat sealing film 5 are pressed between the compression sleeve 11 and the hot pressing member 31. Under the high temperature heating of the hot pressing member 31, the heat sealing film 5 and the cup body 4 are heat-sealed.

[0082] After heat sealing is complete, the support beam 15 is driven downward by the driver 16, releasing the pressure from the compression sleeve 11 and the heat-pressing element 31. Once it reaches a certain position, the compression sleeve 11 is released from the support bracket 22. The outwardly expanded portion of the support bracket 22 is deformed and restored, and the rim 41 of the cup body 4 is once again received by the support bracket 22. The cup holder assembly 2 can then continue to translate to remove the sealed cup body 4.

[0083] Before step S1 , it is also included to confirm whether the specifications of the compression sleeve 11 on the supporting mechanism 1 are consistent with the specifications of the packaged cup body 4 . If they are inconsistent, the compression sleeve 11 needs to be replaced with a suitable one.

[0084] Before step S1, it is also necessary to confirm whether the opening size of the support bracket 22 is suitable for the packaged cup body 4. If not, the opening size of the support bracket 22 needs to be adjusted. Specifically, by adjusting the axial position of the adjustment ring 24 relative to the fixing ring 23, the inclination angle of the elastic finger 222 relative to the axis of the connecting portion 221 is adjusted, thereby adjusting the opening size of the support bracket 22 so that the support bracket 22 is compatible with the cup rim 41 of the packaged cup body 4.

[0085] Before step S1, it is also included to confirm whether the horizontality of the suspension beam 33 meets the heat sealing requirements. If not, its horizontality is adjusted by the adjustment component 34 so that the multiple hot pressing parts 31 and the multiple compression sleeves 11 can be reliably compressed to ensure the integrity and tightness of the sealing of each cup body 4.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A heat sealing device, characterized in that: include: A supporting mechanism including a compression sleeve; The cup holder assembly includes a template and a support bracket. The template is provided with a through hole. The support bracket is an annular structure and is arranged coaxially with the through hole. One end of the support bracket is connected to the template in the axial direction, and the opening of the other end can be expanded or contracted to support the rim of the cup body to be heat-sealed. The cup holder assembly can move above the support mechanism and move in the vertical direction to release the cup body into the compression sleeve. A heat sealing mechanism is located above the supporting mechanism and includes a heat pressing member. The heat pressing member is correspondingly arranged with the compression sleeve, and the cup edge of the cup body can be compressed between the top end of the compression sleeve and the heat pressing member. The support bracket includes: a connecting portion and a plurality of elastic fingers, wherein the connecting portion is connected to the template, the plurality of elastic fingers are arranged at intervals along the circumference of the connecting portion, the elastic fingers are inclined from one end of the connecting portion toward the axis of the connecting portion, the elastic fingers can be squeezed to change the inclination angle, and the end of the elastic finger away from the connecting portion is used to support the cup edge of the cup body; The cup holder assembly further includes: a fixing ring and an adjusting ring, wherein the fixing ring, the adjusting ring and the through hole are coaxially arranged, the fixing ring is fixedly connected to the template, the adjusting ring is located on the inner side of the fixing ring, and the connecting portion is located between the fixing ring and the adjusting ring; The fixing ring is provided with a first annular flange extending inwardly, and the elastic finger is located between the end of the adjustment ring and the first annular flange. The position of the adjustment ring relative to the fixing ring in its axial direction is adjustable, so that the elastic finger is deformed to change the tilt angle.

2. The heat sealing device according to claim 1, characterized in that The supporting mechanism also includes: a top plate and an elastic member, the top plate is located in the compression sleeve and is used to support the cup body; the top plate is connected to the bottom of the compression sleeve through the elastic member, so that the cup edge of the cup body can be separated from the top of the compression sleeve under the action of the elastic member.

3. The heat sealing device according to claim 1, characterized in that The supporting mechanism further includes: a driving member and a support beam, a plurality of the compression sleeves are mounted on the support beam, and a driving end of the driving member is connected to the support beam for driving the support beam to move toward the hot pressing member.

4. The heat sealing device according to claim 1, characterized in that The heat sealing mechanism also includes: a bracket and a suspension beam, the suspension beam is installed on the bracket, a plurality of the hot pressing parts are fixed below the suspension beam, and the template is correspondingly provided with a plurality of the through holes; the supporting mechanism also includes a support beam, and a plurality of the compression sleeves are correspondingly installed on the support beam.

5. The heat sealing device according to claim 4, characterized in that: The heat sealing mechanism also includes: multiple adjustment components, the adjustment components include a screw rod, a nut and a clamp, the screw rod is vertically passed through the bracket, the suspension beam is fixed to the lower end of the screw rod, the nut is threadedly connected to the screw rod, the clamp is openably and closably clamped to the screw rod, and the bracket is limited between the nut and the clamp.

6. The heat sealing device according to claim 5, characterized in that: The clamp includes: a first holding part, a second holding part and a fixing part. The first holding part and the second holding part are held on both sides of the screw rod and locked by the fixing part. The inner side surfaces of the first holding part and the second holding part are provided with threads that match the external threads of the screw rod.

7. The heat sealing device according to claim 4, characterized in that The hot pressing part comprises: A heating seat plate, a pressure block and a connecting column, wherein a heating element is provided in the heating seat plate, the heating seat plate and the suspension beam are spaced apart, the heating seat plate is fixedly connected to the suspension beam through the connecting column, and the pressure block is installed on the lower surface of the heating seat plate and is thermally connected to the heating seat plate.

8. A heat sealing method, used for the heat sealing device according to any one of claims 1 to 7, characterized in that: Including steps: Place the cup body to be heat-sealed on the cup holder assembly so that the rim of the cup body is supported by the support holder. After the cup body is filled, cover the cup body with a heat-sealing film; Controlling the compression sleeve to move downward to a first position, controlling the cup holder assembly to translate to above the supporting mechanism, and then controlling the compression sleeve to move upward so that the cup body is supported in the compression sleeve; Controlling the compression sleeve to move upward to a second position so that the cup edge and the heat-sealing film of the cup body are pressed tightly between the top end of the compression sleeve and the heat-pressing member; The compression sleeve is controlled to move downward so that the cup edge of the cup body is supported on the support bracket again.

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