Heat sealing device and heat sealing method

Abstract

The invention relates to the technical field of packaging, and provides a heat sealing device and a heat sealing method. The heat sealing device comprises a bearing mechanism and a sealing mechanism, wherein the bearing mechanism comprises a pressing sleeve; the cup holder assembly comprises a template and a support holder, the template is provided with a through hole, the support holder is of an annular structure and is coaxial with the through hole, one axial upward end of the support holder is connected to the template, an opening in the other end of the support holder can be expanded or shrunk, and the support holder is used for bearing the cup edge of a cup body to be heat-sealed; the cup holder assembly can move to the position above the bearing mechanism and move in the vertical direction, and the cup body is released into the pressing sleeve. And the heat sealing mechanism is located above the bearing mechanism and comprises a hot pressing piece, the hot pressing piece and the pressing sleeve are correspondingly arranged, and the cup edge of the cup body can be pressed between the top end of the pressing sleeve and the hot pressing piece. The heat sealing device is provided. The cup stand assembly of the heat sealing device can be matched with cup bodies of different sizes and specifications, the template and the supporting bracket do not need to be replaced, the dismounting and mounting time of the device is greatly shortened, and the cost and management difficulty of the template are reduced.

Description

Technical Field

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

[0002] At present, in the production of cup foods, a heat sealing device is usually used to press and seal a heat sealing film and the edge of the cup, so that the internal space of the cup body is isolated from the outside world to ensure the sanitary quality of the product.

[0003] A heat sealing mechanism is provided on the upper part of the heat sealing device, and the cup body to be heat sealed is supported by the template. After the food filling is completed, the template drives the multiple cup bodies to move to the bottom of the heat sealing mechanism, and the multiple heat sealing heads on the heat sealing mechanism move downward to press against the template. The heat sealing film and the edge of the cup are pressed tightly between the heat sealing mechanism and the template. The high-temperature heat sealing head of the heat sealing mechanism melts the low-temperature film under the heat sealing film, causing the annular area of ​​the cup edge to bond with the melted low-temperature film, thereby achieving the sealing of multiple cup bodies.

[0004] However, since different cup sizes will have corresponding templates, when heat-sealing cups of different specifications, the templates of corresponding specifications need to be replaced. The larger the product volume, the more templates need to be replaced, and the disassembly and assembly of the templates takes a lot of time, which affects production efficiency and increases the procurement cost and management difficulty of the templates. 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 that the heat sealing device in the prior art needs to replace different molds according to the size specifications of the product, resulting in low production efficiency, high mold cost and great management difficulty.

[0006] The present invention provides a heat sealing device, comprising: A supporting mechanism, including a compression sleeve; The cup holder assembly comprises a template and a support holder, wherein the template is provided with a through hole, the support holder is an annular structure and is coaxially arranged with the through hole, one end of the support holder in the axial direction is connected to the template, 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 move to the top of the support 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 and comprises a heat pressing piece, wherein the heat pressing piece is arranged corresponding to 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 piece.

[0007] 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.

[0008] 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 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, the elastic finger is located between the end of the adjustment ring and the first annular flange, and 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.

[0009] According to a heat sealing device provided by the present invention, the supporting mechanism also includes: a top plate and an elastic member, wherein 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 end of the compression sleeve under the action of the elastic member.

[0010] According to a heat sealing device provided by the present invention, the supporting mechanism also includes: a driving member and a support beam, a plurality of the compression sleeves are installed 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.

[0011] According to a heat sealing device provided by the present invention, 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.

[0012] According to a heat sealing device provided by the present invention, the heat sealing mechanism also includes: a plurality of adjustment components, the adjustment components include a screw rod, a nut and a clamp, the screw rod is vertically penetrated 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.

[0013] 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 piece, the first holding part and the second holding part are held on both sides of the screw rod and locked by the fixing piece, and the inner side surfaces of the first holding part and the second holding part are provided with threads matching the external threads of the screw rod.

[0014] According to a heat sealing device provided by the present invention, the heat pressing member comprises: A heating seat plate, a pressing block and a connecting column, wherein a heating element is arranged inside 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 pressing block is installed on the lower surface of the heating seat plate and is thermally connected to the heating seat plate.

[0015] The present invention also provides a heat sealing method, which is used for any of the above heat sealing devices, comprising the steps of: Placing the cup body to be heat-sealed on the cup holder assembly so that the cup edge of the cup body is supported on the support holder, and after the filling of the cup body is completed, covering 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 move horizontally to above the supporting mechanism, and then controlling the compression sleeve to move upward so that the cup body is carried 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 compressed 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.

[0016] The heat sealing device and heat sealing method provided by the present invention provide a support bracket with an opening that can be expanded or reduced on the template, and the support bracket can support the cup edge of cup bodies of different sizes and specifications, so that the cup holder assembly can adapt to cup bodies of different sizes and specifications, thereby improving the versatility of the cup holder assembly. When sealing cup bodies of different sizes and specifications, there is no need to replace the template and the support bracket, and only the compression sleeve on the support mechanism needs to be replaced, which greatly shortens the assembly and disassembly time of the device, improves production efficiency, and reduces the cost and management difficulty of the template. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces 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 creative work.

[0018] Figure 1 This is one of the structural schematic diagrams of the heat sealing device provided by the present invention. Figure 2 This is the second structural schematic diagram of the heat sealing device provided by the present invention.

[0019] 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.

[0020] Figure 4 It is a schematic structural diagram of a support bracket in the heat sealing device provided by the present invention.

[0021] Figure 5 It is a schematic structural diagram of the clamp in the heat sealing device provided by the present invention.

[0022] Reference numerals: 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 holder; 221. Connecting part; 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, beam; 33, suspension beam; 34, adjustment component; 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 edge; 5, heat sealing film. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "first" and "second" are for the purpose of clearly explaining the numbering of 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, the meaning of "multiple" is 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 objects associated before and after are in an "or" relationship.

[0025] Combine the following Figure 1-Figure 5 The heat sealing device and the heat sealing method of the present invention are described.

[0026] 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 carry the cup rim 41 of the cup body 4 to be heat-sealed. The cup holder assembly 2 can move 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, and the hot pressing piece 31 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.

[0027] In the heat sealing device, the supporting mechanism 1 and the heat sealing mechanism 3 are arranged at the heat sealing station. One or more through holes are arranged on the template 21, and a supporting tray 22 for supporting the cup body 4 is arranged in the through hole. The cup holder assembly 2 is used to move the filled cup body 4 to the heat sealing station, so that the supporting tray 22 of the cup holder assembly 2 and the compression sleeve 11 of the supporting mechanism 1 are aligned up and down, and then the cup body 4 is released into the compression sleeve 11. Then, the supporting mechanism 1 and the heat sealing mechanism 3 move relative to each other in the vertical direction, so that the cup edge 41 of the cup body 4 is pressed between the compression sleeve 11 and the hot pressing piece 31, and the cup body 4 is sealed by heating the hot pressing piece 31.

[0028] The template 21 is provided with a plurality of through holes, and a corresponding template 21 is provided with a plurality of support holders 22, so that the cup holder assembly 2 can support a plurality of cup bodies 4 at the same time, and a 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.

[0029] It is understandable that the opening size of 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 edge 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, and the top end of the compression sleeve 11 is adapted to the size of the cup edge 41 of the cup body 4, and is used to support the cup body 4 and apply pressure to the cup edge 41 and the heat-sealing film 5.

[0030] The heat sealing device provided in the embodiment of the present invention provides a support tray 22 with an opening that can be expanded or reduced on the template 21. The support tray 22 can support the cup rim of the cup body 4 of different sizes, so that the cup holder assembly 2 can adapt to the cup body 4 of different sizes, thereby improving the versatility of the cup holder assembly 2. When sealing the cup body 4 of different sizes, there is no need to replace the template 21 and the support tray 22, and only the compression sleeve 11 on the support mechanism 1 needs to be replaced, which greatly shortens the assembly and disassembly time of the device, improves production efficiency, and reduces the cost and management difficulty of the template 21.

[0031] like Figure 4 As shown, in the 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 arranged at intervals along the circumference of the connecting portion 221. The elastic fingers 222 are arranged to be 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 inclination angle. The end of the elastic finger 222 away from the connecting portion 221 is used to support the cup edge 41 of the cup body 4.

[0032] The elastic finger 222 is a hard structural member with a certain elasticity, which has both elastic deformation and elastic recovery capabilities and is sufficient to carry the cup body 4. Optionally, the elastic finger 222 and the connecting portion 221 are integrally formed. The elastic finger 222 is a thin sheet structure, and a plurality of elastic fingers 222 are arranged to form a polygonal ring to support and position the cup body 4.

[0033] When the elastic finger 222 is squeezed inward by an external force, its inclination angle relative to the axis of the connecting portion 221 will increase, so that the end of the elastic finger 222 away from the connecting portion 221 moves radially inward, thereby reducing 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 finger 222. When the external force disappears, the elastic finger 222 automatically returns to the original natural state of the inclination angle.

[0034] 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, so that the end of the elastic finger 222 away from the connecting portion 221 moves 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 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 on the elastic finger 222 is the squeezing force of the cup body 4 itself on it. When the external force disappears, the elastic finger 222 automatically returns to its natural state with the original inclination angle.

[0035] like Figure 3 As shown, in the embodiment of the present invention, the cup holder assembly 2 further includes a fixing ring 23 and an adjusting ring 24. The fixing ring 23, the adjusting ring 24 and the through hole are coaxially arranged. The fixing ring 23 and the adjusting ring 24 cooperate to form the adjusting member described in the above embodiment. The fixing ring 23 is fixedly connected to the template 21, the adjusting ring 24 is located on the inner side of the fixing ring 23, and the connecting portion 221 is located between the fixing ring 23 and the adjusting ring 24. The fixing ring 23 is provided with a first annular flange 231 extending inwardly, and the elastic finger 222 is located between the end of the adjusting ring 24 and the first annular flange 231. The position of the adjusting ring 24 relative to the fixing ring 23 in its axial direction is adjustable, so that the elastic finger 222 is deformed to change the tilt angle.

[0036] Specifically, the fixing ring 23 has a first ring body 232, and a first annular flange 231 is convexly arranged on the inner side of the first ring body 232. The first ring body 232 is a cylindrical structure, which is fixedly connected to the hole 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.

[0037] The adjustment ring 24 has 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 is convexly arranged on 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.

[0038] 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 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 finger 222 is located in the extrusion space.

[0039] When the adjusting ring 24 moves upward relative to the fixing ring 23, the elastic fingers 222 are squeezed by the top of the adjusting ring 24 and the first annular flange 231, so that the inclination angle of the elastic fingers 222 pointing to the axis of the connecting portion 221 becomes larger, thereby reducing the opening size of the support bracket 22. When the adjusting ring 24 moves downward relative to the fixing ring 23, the elastic fingers 222 return to their natural state.

[0040] 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 fine adjustment of the opening size of the support bracket 22 can be achieved.

[0041] In the embodiment of the present invention, the cup holder assembly 2 further includes a positioning member (not shown in the figure). One of the fixing ring 23 and the adjusting ring 24 is provided with a plurality of first mounting holes along the axial direction, and the other is provided with a second mounting hole. The fixing ring 23 is mounted on the adjusting ring by means of a positioning member penetrating any of the first mounting holes and the second mounting holes.

[0042] Specifically, a plurality of first mounting holes are arranged at intervals along the axial direction on the fixing ring 23, and a second mounting hole is arranged on the adjusting ring 24. Alternatively, a plurality of first mounting holes are arranged at intervals along the axial direction on the adjusting ring 24, and a second mounting hole is arranged on the fixing ring 23. By adjusting different first mounting holes to be opposite to the second mounting holes, and then fixing the fixing ring 23 and the adjusting ring 24 by the positioning member, the axial position of the adjusting ring 24 relative to the fixing ring 23 is adjusted, and the opening size of the support bracket 22 is adjusted.

[0043] In the embodiment of the present invention, the supporting mechanism 1 further includes a top plate 12 and an elastic member 13. The top plate 12 is located in 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 through the elastic member 13, so that the cup edge 41 of the cup body 4 can be separated from the top of the compression sleeve 11 under the action of the elastic member 13. Among them, the elastic member 13 can be an elastic member such as a spring or a shrapnel.

[0044] 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 edge 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, see Figure 2 .

[0045] After heat sealing, the compression sleeve 11 and the heat pressing member 31 are separated, and the cup edge 41 of the cup body 4 is separated from the top of the compression sleeve 11 under the action of the elastic member 13, which can prevent the cup body 4 and the compression sleeve 11 from being locked. In addition, after heat sealing, the cup holder assembly 2 needs to move up to support the cup body 4 again and remove the cup body. In this embodiment, the cup edge 41 and the compression sleeve 11 are separated by the elastic member 13, so that the support holder 22 can smoothly receive the cup edge 41 when moving up. 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 edge 41, which is conducive to increasing the heat sealing area between the heat sealing film 5 and the cup edge 41 and improving the sealing effect.

[0046] Specifically, a positioning column 14 is provided at the bottom of the compression sleeve 11. The elastic member 13 is a spring, and a part of the spring is sleeved on the positioning column 14. The lower end of the spring is fixedly connected to the positioning column 14, and the upper end of the spring is fixedly connected to the top plate 12.

[0047] Furthermore, the supporting mechanism 1 further includes a supporting beam 15, and the compression sleeve 11 is mounted on the supporting beam 15. A plurality of compression sleeves 11 can be mounted on the supporting beam 15, corresponding one to one with the plurality of support brackets 22 on the cup holder assembly 2. Optionally, a plurality of positioning columns 14 are fixed on the supporting beam 15, and the compression sleeve 11 is sleeved on the positioning columns 14, and the installation and positioning of the compression sleeve 11 are realized by the positioning columns 14, so that the installation and removal of the compression sleeve 11 can be facilitated.

[0048] In the 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.

[0049] In the conventional sealing device, the multiple hot pressing parts 31 are respectively moved downward under the guidance of the guide positioning structure to be pressed and matched with the template to achieve the hot pressing and sealing of multiple cup bodies. Among them, since the template is a thin plate-like part and is easy to deform, the guide positioning structure will cause the gap deviation in the heat sealing area, thus causing the problem of incomplete and loose sealing.

[0050] In the embodiment of the present invention, the hot pressing member 31 remains stationary, and the support beam 15 is driven to move upward by the driving member 16, thereby driving multiple compression sleeves 11 to cooperate with multiple hot pressing members 31 to achieve 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.

[0051] In the 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 a plurality of hot pressing parts 31 are fixed below the suspension beam 33. The template 21 is provided with a plurality of through holes. The supporting mechanism 1 further includes a support beam 15, and a plurality of compression sleeves 11 are mounted on the support beam 15.

[0052] The suspension beam 33 can be installed on the bracket 32 ​​through 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 up by the drive member to facilitate the replacement operation.

[0053] Specifically, the bracket 32 ​​includes two pillars 321 and a crossbeam 322. The two pillars 321 are arranged on both sides 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. A plurality of hot pressing parts 31 are fixed below the suspension beam 33, and the plurality of hot pressing parts 31 are integrated into an integral structure.

[0054] 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 respectively provided on both sides of the crossbeam 322 to clamp the crossbeam 322. In this way, a detachable connection between the crossbeam 322 and the support 321 is achieved, and the height and levelness of the crossbeam 322 can be adjusted by the nuts.

[0055] 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 .

[0056] In the embodiment of the present invention, the hot pressing member 31 includes a heating seat plate 311, a pressing block 312 and a connecting column (not shown in the figure). A heating member 3111 is arranged inside the heating seat plate 311. The heating seat plate 311 is spaced apart from the suspension beam 33, and the heating seat plate 311 is fixedly connected to the suspension beam 33 through the connecting column. The pressing block 312 is installed on the lower surface of the heating seat plate 311 and is thermally connected to the heating seat plate 311.

[0057] The heating element 3111 may be an electric heating tube embedded in the heating seat plate 311. The cross-sectional dimension of the connecting column is much smaller than the dimension of the side of the heating seat plate 311 facing the suspension beam 33. The heating seat plate 311 and the suspension beam 33 are fixed by the connecting column, and a certain interval is maintained between the heating seat plate 311 and the suspension beam 33, so as to prevent the temperature of the heating seat plate 311 from being transferred upward. The temperature of the heating seat plate 311 is transferred to the pressing block 312 below, so that the temperature is evenly distributed on the pressing block 312.

[0058] Optionally, the pressing block 312 can be detachably mounted on the heating seat plate 311, for example, by fixing the pressing block 312 and the heating seat plate 311 with countersunk bolts. The cup bodies 4 of different sizes can be adapted by replacing the pressing blocks 312 of different sizes.

[0059] like Figure 1 or Figure 2 As shown, in an optional embodiment, the heat sealing mechanism 3 further includes a plurality of adjustment components 34. The adjustment component 34 includes a screw rod 341, a nut 342 and a clamp 343. The screw rod 341 is vertically penetrated in the bracket 32, and the suspension beam 33 is fixed to the lower end of the screw rod 341. The nut 342 is threadedly connected to the screw rod 341, and the clamp 343 can be opened and closed and is clamped on the screw rod 341. The bracket 32 ​​is limited between the nut 342 and the clamp.

[0060] Specifically, the screw rod 341 is vertically inserted into the cross beam 322 of the bracket 32. The nut 342 is located above the cross beam 322, and the clamp 343 is located below the cross beam 322, and the cross beam 322 is clamped between the nut 342 and the clamp 343. The nut 342 limits the screw rod 341 from moving downward relative to the cross beam 322, and the clamp 343 limits the screw rod 341 from moving upward relative to the cross beam 322. Through the two-way limiting of the nut 342 and the clamp 343, the suspension beam 33 and the bracket 32 ​​are reliably fixed.

[0061] The suspension beam 33 is connected to the cross beam 322 through the screw rods 341 of the multiple adjustment components 34. The horizontality of the suspension beam 33 can be adjusted by adjusting the positions of the nuts 342 and the clamps 343 of the multiple adjustment components 34 on the screw rods 341, thereby adjusting the horizontality of the multiple hot pressing parts 31. During the adjustment process, the limit is released by opening the clamps 343, and then the adjustment is performed by turning the knob nuts 342. After the adjustment is in place, the clamps 343 are closed to complete the fixation. The openable and closable design of the clamps 343 facilitates the adjustment of the horizontality.

[0062] Furthermore, 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 are held on both sides of the screw rod 341 and 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 match the external threads of the screw rod 341.

[0063] Specifically, one end of the first holding portion 3431 is rotatably connected to one end of the second holding portion 3432, and 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 fix the two. 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 achieve axial fixation of the clamp 343 and the screw rod 341.

[0064] The embodiment of the present invention further provides a heat sealing method, which is used in the heat sealing device described in any of the above embodiments. The heat sealing method comprises the following steps: Step S1 , placing the cup body 4 to be heat-sealed on the cup holder assembly 2 , so that the cup rim 41 of the cup body 4 is supported on the support holder 22 , and after the filling of the cup body 4 is completed, covering the cup body 4 with a heat-sealing film 5 .

[0065] Step S2 , controlling the compression sleeve 11 to move downward to the first position, controlling the cup holder assembly 2 to move horizontally to the top of 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 .

[0066] Step S3 , controlling the compression sleeve 11 to move upward to the second position, so that the cup edge 41 of the cup body 4 and the heat-sealing film 5 are compressed between the top end of the compression sleeve 11 and the heat-pressing member 31 .

[0067] 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.

[0068] After the filling of the cup body 4 is completed, the cup holder assembly 2 moves toward the supporting mechanism 1, and the pressing sleeve 11 is controlled to move down to the first position. Specifically, the driving member 16 drives the support beam 15 to move down, so that the pressing sleeve 11 switches to the first position to avoid the cup holder assembly 2 that moves 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 inserted into the support bracket 22 , and the support bracket 22 is located outside the compression sleeve 11 and expands accordingly, and the cup body 4 is separated from the cup holder assembly 2 and is received by the compression sleeve 11 .

[0069] Continue to control the compression sleeve to move up to the second position, so that the cup edge 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 is heat-sealed and connected with the cup body 4.

[0070] After the heat sealing is completed, the driving member 16 drives the support beam 15 to move downward, and the pressing force of the pressing sleeve 11 and the heat pressing member 31 is released. When the pressing sleeve 11 reaches a certain position, it is separated from the support bracket 22, and the part of the support bracket 22 that expands outward is deformed and restored, and the cup edge 41 of the cup body 4 is again received by the support bracket 22. After that, the cup holder assembly 2 can continue to translate to remove the encapsulated cup body 4.

[0071] 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 packaging cup body 4 . If they are inconsistent, the compression sleeve 11 needs to be replaced with a matching one.

[0072] Before step S1, it is also included 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, the inclination angle of the elastic finger 222 relative to the axis of the connecting portion 221 is adjusted by adjusting the axial position of the adjusting ring 24 relative to the fixing ring 23, thereby adjusting the opening size of the support bracket 22 so that the support bracket 22 is adapted to the cup edge 41 of the packaged cup body 4.

[0073] Before step S1, it also includes confirming whether the horizontality of the suspension beam 33 meets the heat sealing requirements. If not, the horizontality is adjusted by adjusting the adjustment component 34 so that multiple hot pressing parts 31 and multiple compression sleeves 11 can be reliably compressed to ensure the integrity and tightness of the sealing of each cup body 4.

[0074] 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 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 comprises a template and a support holder, wherein the template is provided with a through hole, the support holder is an annular structure and is coaxially arranged with the through hole, one end of the support holder in the axial direction is connected to the template, 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 move to the top of the support 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 and comprises a heat pressing piece, wherein the heat pressing piece is arranged corresponding to 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 piece.

2. The heat sealing device according to claim 1, characterized in that: 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 fingers away from the connecting part is used to support the cup edge of the cup body.

3. The heat sealing device according to claim 2, characterized in that: 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, the elastic finger is located between the end of the adjustment ring and the first annular flange, and 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.

4. The heat sealing device according to claim 1, characterized in that: The supporting mechanism also includes: a top plate and an elastic member, wherein the top plate is located inside 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.

5. 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.

6. 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.

7. The heat sealing device according to claim 6, characterized in that: The heat sealing mechanism also includes: a plurality of adjustment components, the adjustment components including 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.

8. The heat sealing device according to claim 7, characterized in that: The clamp includes: a first holding part, a second holding part and a fixing piece. The first holding part and the second holding part are held on both sides of the screw rod and locked by the fixing piece. The inner side surfaces of the first holding part and the second holding part are provided with threads matching with the external threads of the screw rod.

9. The heat sealing device according to claim 6, characterized in that: The hot pressing part comprises: A heating seat plate, a pressing block and a connecting column, wherein a heating element is arranged inside 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 pressing block is installed on the lower surface of the heating seat plate and is thermally connected to the heating seat plate.

10. A heat sealing method, used in the heat sealing device according to any one of claims 1 to 9, characterized in that: Includes steps: Placing the cup body to be heat-sealed on the cup holder assembly so that the cup edge of the cup body is supported on the support holder, and after the filling of the cup body is completed, covering 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 move horizontally to above the supporting mechanism, and then controlling the compression sleeve to move upward so that the cup body is carried 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 compressed 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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