Hot-pressing sealing device and sealing method for moisture-proof paper cup

Abstract

The invention relates to the technical field of hot-pressing sealing devices, in particular to a hot-pressing sealing device and sealing method for a moisture-proof paper cup, which comprises a base, a workbench is arranged at the upper end of the base, a placing rack is arranged on the workbench, and a bending mechanism is arranged at the upper end of the workbench and close to the placing rack. The bending mechanism is arranged, the end, provided with an inner cushion layer, of a cup body is further extruded in the direction of a paper cup mold through a shifting plate, the inner cushion layer is automatically placed on the inner side of the cup body, and an outer cushion layer is automatically placed on the outer side of the cup body; the splicing seams on the inner side and the outer side of the cup body are sealed, so that the exposed area of the splicing seams of the cup body is reduced, the possibility that the splicing seams of the cup body are unglued, damaged and leaked is reduced, the hot-pressing sealing effect of the cup body of the paper cup is improved, and the anti-leakage effect of the cup body of the paper cup is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of hot-press sealing devices, in particular to a hot-press sealing device and sealing method for moisture-proof paper cups. BACKGROUND

[0002] Hot-press sealing is a method of heating the material at the sealing position to make it reach a viscous flow state, and then applying pressure to make it stick. Generally, a hot-press sealing device or a hot-press sealing machine is used to complete the sealing. The hot-press sealing head is the actuator of the hot-press sealing. According to the structure of the hot-press sealing head and the heating method, the hot-press sealing method can be divided into several types, such as ordinary hot-press sealing, fuse sealing, pulse sealing, ultrasonic sealing, high-frequency hot sealing, and induction hot sealing. Different film characteristics require different hot sealing methods. For example, ultrasonic sealing and high-frequency hot sealing are more suitable for films that are easily deformed by heat. However, the most commonly used hot sealing method is ordinary hot-press sealing. Ordinary hot-press sealing can be further divided into several types, such as flat plate hot sealing, disc hot sealing, belt hot sealing, and sliding clamp sealing. Flat plate hot sealing is the most widely used method.

[0003] In view of the above related technologies, the existing paper cup hot-press equipment stacks one side of the unfolded surface of the cup body with the other side of the unfolded surface of the cup body, connects the beginning and the end of the cup body, and then splices the cup body into a cylindrical structure. Then, the hot-press equipment melts the glue on the surface of the spliced joint of the cup body, directly pastes the two ends of the cup body with the glue, and forms a mutual stacking structure at the spliced joint of the cup body. Then, the hot-press splicing of the paper cup is completed. However, this splicing process may cause the spliced joint of the paper cup to have problems such as spliced joint edge lifting, incomplete spliced joint pasting, and spliced joint misalignment. In addition, the above splicing process may be affected by external factors (such as moisture) during the storage of the paper cup, which may cause the spliced joint to have problems such as edge lifting and glue opening. In the subsequent use of the paper cup, the spliced joint of the cup body may easily leak, which greatly reduces the storage difficulty and use experience of the paper cup product. SUMMARY

[0004] In view of the above-mentioned shortcomings of the prior art, the present application provides a kind of hot-press sealing device for moisture-proof paper cup, including base, the upper end of the base is equipped with workbench, the workbench is equipped with rack, the upper end of the workbench and the position close to rack are equipped with bending mechanism, the upper end of the workbench and the position close to bending mechanism are equipped with pressure combination mechanism, the bending mechanism includes drive assembly fixed to the lower end of workbench, the reciprocating push rod is equipped on the drive assembly, the upper end of the reciprocating push rod is equipped with first rotary lever, the outer side of the first rotary lever and the position close to center are equipped with curved clamping plate, the lower end of the workbench and the position close to first rotary lever are equipped with first fixed frame, the inner side of the first fixed frame and the position close to curved clamping plate are equipped with first linkage assembly, the first linkage assembly is used to control curved clamping plate opening and closing, the outer side of the first linkage assembly is equipped with second linkage assembly, the upper end of the workbench and the position close to curved clamping plate are equipped with paper cup mould for processing paper cup body, the paper cup body includes cup body, the inner side wall of the cup body and the position close to joint seam are equipped with inner pad layer, the outer side wall of the cup body and the position close to joint seam are equipped with outer pad layer, the upper end of the workbench and the position close to paper cup mould are equipped with demoulding mechanism.

[0005] Further, the first linkage assembly includes first connecting rod rotatably connected to the reciprocating push rod, one end of the first connecting rod close to the reciprocating push rod is provided with a second rotary lever, the second rotary lever is inserted into the first fixed frame, one end of the first connecting rod away from the second rotary lever is provided with a second connecting rod, one end of the second connecting rod close to the curved clamping plate is provided with a first connecting seat, the first connecting seat is fixedly connected with the curved clamping plate, a limiting rod is inserted into the first connecting rod, and the inner side of one of the curved clamping plates and the position close to the edge are provided with a second linkage assembly.

[0006] Further, the second linkage assembly includes a push plate installed on the inner side of one of the curved clamping plates, the push plate is rotatably connected with the curved clamping plate, the outer side of the push plate and the position close to the first connecting seat are provided with a second connecting seat, one end of the second connecting seat is provided with a third connecting rod, one end of the third connecting rod is provided with a fourth connecting rod, the outer side of the third connecting rod and the position close to the fourth connecting rod are provided with a third connecting seat, the outer side of the fourth connecting rod and the position close to the center are provided with a fourth connecting seat, one end of the fourth connecting rod is provided with a fifth connecting rod, one end of the fifth connecting rod is provided with a fifth connecting seat, and the fifth connecting seat is fixedly installed on the outer side of the first connecting seat.

[0007] Further, the third connecting rod and the third connecting seat are rotatably connected by a torsion spring, the inner side wall of the push plate is flush with the inner side wall of the curved clamping plate, the distance between one end of the third connecting rod and the outer side wall of the curved clamping plate is greater than the distance between the other end of the third connecting rod and the outer side wall of the curved clamping plate, and the end of the third connecting rod with smaller distance from the outer side wall of the curved clamping plate is connected with the fourth connecting rod.

[0008] Further, the inner pad layer is fixedly attached to one end of the cup body close to the actuating plate after the cup body is unfolded, and the outer pad layer is fixedly attached to the other end of the cup body after the cup body is unfolded, and the width of the inner pad layer is greater than the width of the outer pad layer.

[0009] Further, the cup body sleeved on the paper cup mold is located below the pressing mechanism, the pressing mechanism comprises a second fixing frame, the second fixing frame is installed at the upper end of the workbench and close to the cup body, a heater is arranged at the outer side of the second fixing frame and close to the center and located directly above the cup body to be processed, a fixed plate is arranged at the lower end of the second fixing frame and close to the heater, a buffer rod is arranged at the lower end of the fixed plate, and a hot pressing head is arranged at the lower end of the buffer rod.

[0010] Further, the hot pressing head comprises a middle push rod, the lower end of the middle push rod is provided with a middle hot pressing plate, the two sides of the middle hot pressing plate are provided with side hot pressing plates, the two side hot pressing plates are symmetrically distributed about the middle hot pressing plate, the upper end of the side hot pressing plate is provided with a spring telescopic rod, the lower end surface of the side hot pressing plate is flush with the middle hot pressing plate, the outer side of the side hot pressing plate is provided with an elastic heat-resistant pad layer, and the elastic heat-resistant pad layer is sleeved on the outer side of the side hot pressing plate.

[0011] A sealing method of the hot pressing sealing device for the moisture-proof paper cup, comprising the following steps, S1. Attaching the pad layer, before hot pressing splicing the cup body, an outer pad layer is attached to one end of the unfolded surface of the cup body, and an inner pad layer is attached to the other end of the unfolded surface of the cup body, and then the cup body to be spliced is placed in the placing frame; S2. Cup body bending, the cup body to be spliced is laid on the workbench, the driving assembly controls the reciprocating push rod to reciprocate in the vertical direction, the reciprocating push rod drives the first connecting rod to swing, and then the first linkage assembly controls the opening and closing of the curved clamping plate, so that the curved clamping plate bends the cup body, and the inner side wall of the cup body can be attached to the outer side wall of the paper cup mold; S3. Cup body attachment, when the first linkage assembly drives the curved clamping plate to open and close, the circumferential rotation of the first connecting seat can control the movement of the second linkage assembly, the second linkage assembly controls the swinging of the actuating plate, and the curved clamping plate bends the cup body, and at the same time, the actuating plate can further push one end of the cup body with the inner pad layer, so that one end of the cup body with the inner pad layer is attached to the paper plate mold before the other end. S4. Hot pressing splicing, after the side hot pressing plate abuts against the cup body, the inner pad layer is located below the outer pad layer, the middle hot pressing plate continues to move downward, the middle hot pressing plate is inserted into the groove on the outer side wall of the paper cup mold, the elastic heat-resistant pad layer is attached to the outer side wall of the outer pad layer, and then the outer pad layer is completely embedded in the groove on the outer side wall of the cup body, so that the outer side wall of the outer pad layer is flush with the outer side wall of the cup body, and the hot pressing splicing of the cup body is completed.

[0012] Compared with the known prior art, the technical scheme provided by the application has the following beneficial effects: 1. The application sets the bending mechanism, and utilizes the linkage of the second linkage assembly and the first linkage assembly. In the process of extruding the cup body by the curved clamp plate, the end of the cup body with the inner pad layer is further extruded to the direction of the paper cup mold by the push plate, the inner pad layer is automatically placed on the inner side of the cup body, the outer pad layer is placed on the outer side of the cup body, the splicing seam on the inner and outer sides of the cup body is sealed, the area of the exposed splicing seam of the cup body is reduced, the possibility of the splicing seam of the cup body being opened and damaged and then leaking is reduced, the hot-press sealing effect of the paper cup body is improved, and the anti-leakage effect of the paper cup body is improved.

[0013] 2. The application sets the pressing mechanism. In the process of hot-press sealing, the cup body is fixed and hot-pressed by the side heating plate, and the position close to the splicing seam on the outer side of the cup body is pressed by the middle heating plate. The recess capable of completely embedding the outer pad layer is formed at the position close to the splicing seam on the outer side of the cup body, the fitting area between the outer pad layer and the cup body is increased, the splicing part of the outer side wall of the cup body and the outer pad layer is smoother, the possibility of the edge of the outer pad layer being warped is reduced, and the hot-press sealing effect of the cup body is improved.

[0014] 3. The application sets the elastic heat-resistant pad layer. The elastic heat-resistant pad layer is sleeved on the outer side of the middle hot-press plate, so that the elastic heat-resistant pad layer can be deformed with the displacement of the middle hot-press plate. The cup body and the inner pad layer can be completely fitted in the recess on the paper plate mold by the elastic heat-resistant pad layer, the possibility of the cup body being damaged after being extruded is reduced, the high-temperature shaping effect of the recess on the cup body is improved, and the hot-press sealing effect of the pressing mechanism is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the application; Figure 2 It is a schematic diagram of the structure of the workbench in the embodiment of the application; Figure 3 It is a schematic diagram of the structure of the bending mechanism in the embodiment of the application; Figure 4 It is a schematic diagram of the structure of the curved clamp plate in the embodiment of the application; Figure 5 It is a schematic diagram of the structure of the first linkage assembly in the embodiment of the application; Figure 6 It is a schematic diagram of the structure of the second linkage assembly in the embodiment of the application; Figure 7 It is an enlarged view of A in the embodiment of the application; Figure 6 Figure 8 ​It is a structure schematic view of the pressing mechanism in the embodiment of the present application; Figure 9 It is a structure schematic view of the buffer rod in the embodiment of the present application; Figure 10 It is a structure schematic view of the hot pressing head in the embodiment of the present application; Figure 11 It is a structure schematic view of the paper cup body in the embodiment of the present application; Figure 12 It is a schematic view of the cup body splicing state in the embodiment of the present application.

[0016] In the figure: 1, machine base; 11, placing rack; 12, workbench; 2, bending mechanism; 21, driving assembly; 22, reciprocating push rod; 23, first fixed frame; 24, first rotating rod; 25, curved clamping plate; 26, first linkage assembly; 261, first connecting rod; 262, second rotating rod; 263, limiting rod; 264, second connecting rod; 265, first connecting seat; 27, second linkage assembly; 271, push plate; 272, second connecting seat; 273, third connecting rod; 274, third connecting seat; 275, fourth connecting rod; 276, fourth connecting seat; 277, fifth connecting rod; 278, fifth connecting seat; 28, paper cup mold; 3, pressing mechanism; 31, second fixed frame; 32, heater; 33, fixed plate; 331, buffer rod; 34, hot pressing head; 341, middle push rod; 342, spring telescopic rod; 343, middle hot pressing plate; 344, side hot pressing plate; 345, elastic heat-resistant cushion layer; 4, demolding mechanism; 5, paper cup body; 51, cup body; 52, inner cushion layer; 53, outer cushion layer. DETAILED DESCRIPTION

[0017] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings in the specification Figures 1-12 and specific embodiments.

[0018] Reference Figure 1 , Figure 2 , Figure 11 and Figure 12The application discloses a hot-press sealing device for moisture-proof paper cups, which comprises a machine base 1 for processing a paper cup body 5, a placing rack 11, a workbench 12, a bending mechanism 2, a pressing mechanism 3 and a demolding mechanism 4. The paper cup body 5 comprises a cup body 51, an inner pad layer 52 and an outer pad layer 53. The cup body 51 in an unfolded state is provided in a fan-shaped structure. The inner pad layer 52 is attached to one end of the cup body 51 in the unfolded state, one end of the inner pad layer 52 is attached to the inner side wall of the cup body 51, and the other end of the inner pad layer 52 is used for being attached to the other end of the cup body 51. The outer pad layer 53 is attached to the other end of the cup body 51 in the unfolded state, one end of the outer pad layer 53 is attached to the outer side wall of the cup body 51, and the other end of the outer pad layer 53 is used for being attached to the other end of the cup body 51. The inner pad layer 52 and the outer pad layer 53 are both provided in a waterproof and moisture-proof material. After the two ends of the cup body 51 are spliced and sealed, the outer pad layer 53 is attached to the outer side wall of the cup body 51 and is close to the splicing joint, the outer pad layer 53 seals the outer side of the splicing joint of the cup body 51, the inner pad layer 52 is attached to the inner side wall of the cup body 51 and is close to the splicing joint, and the inner pad layer 52 seals the inner side of the splicing joint of the cup body 51. The workbench 12 is fixedly installed at the upper end of the machine base 1 and is close to the edge. The placing rack 11 is fixedly installed at the upper end of the workbench 12 and is close to the edge, and the cup body 51 to be processed and in the unfolded state is placed at the inner side of the placing rack 11. The bending mechanism 2 is installed at the inner side of the machine base 1 and is close to the workbench 12, and the bending mechanism 2 is used for bending the cup body 51 of the paper cup body 5, facilitating splicing of the cup body 51 in the unfolded state, making the cup body 51 into a cylindrical structure and facilitating hot-press sealing splicing. The pressing mechanism 3 is installed at the upper end of the workbench 12 and is close to the bending mechanism 2, and is used for hot-press sealing treatment of the cup body 51 in the bent state. The demolding mechanism 4 is installed at the upper end of the workbench 12 and is close to the bending mechanism 2, and is used for demolding treatment of the spliced cup body 51.

[0019] Before hot-press sealing processing, the outer pad layer 53 is attached to one end of the cup body 51, the inner pad layer 52 is attached to the other end of the cup body 51, the outer pad layer 53 is located on one side of the cup body 51, and the inner pad layer 52 is located on the other side of the cup body 51. Then, the cup body 51 plates to be hot-press spliced and sealed are stacked in the inner side of the placing rack 11, the cup body 51 plates to be processed are sequentially conveyed to the bending mechanism 2 and the pressing mechanism 3, the cup body 51 is bent by the bending mechanism 2, the cup body 51 after bending is hot-press sealed by the pressing mechanism 3, the cup body 51 is spliced into a cylindrical structure, and the spliced cup body 51 is demolded by the demolding mechanism, facilitating subsequent processing of the cup body 51.

[0020] Reference Figures 2 to 6 The bending mechanism 2 comprises a driving assembly 21, a reciprocating push rod 22, a first fixing frame 23, a first rotating rod 24, a curved clamping plate 25, a first linkage assembly 26, a second linkage assembly 27 and a paper cup mold 28.

[0021] The driving assembly 21 is fixedly installed in the interior of the base 1 and close to the workbench 12, for controlling the displacement of the reciprocating push rod 22. The reciprocating push rod 22 is installed at the displacement end of the driving assembly 21, and can make reciprocating displacement in the vertical direction under the driving of the driving assembly 21. The first fixed frame 23 is fixedly installed at the lower end of the workbench 12 and close to the reciprocating push rod 22. The first rotating rod 24 is inserted into the inner side of the first fixed frame 23, and the two vertical plates of the first fixed frame 23 are symmetrically distributed about the first rotating rod 24. The two first rotating rods 24 are symmetrically distributed about the reciprocating push rod 22. The curved clamping plates 25 are fixedly installed at the outer side of the first rotating rod 24 and close to the edges, and the curved clamping plates 25 swing about the first rotating rod 24 as the fulcrum. The first linkage assembly 26 is installed at the inner side of the first fixed frame 23 and close to the first rotating rod 24. The second linkage assembly 27 is installed at the inner side of the first fixed frame 23 and close to the first linkage assembly 26. The paper cup mold 28 is fixedly installed at the upper end of the workbench 12 and close to the curved clamping plates 25, and the two curved clamping plates 25 are symmetrically distributed about the paper cup mold 28.

[0022] The first linkage assembly 26 comprises a first connecting rod 261, a second rotating rod 262, a limiting rod 263, a second connecting rod 264 and a first connecting seat 265. The second rotating rod 262 is inserted into the first connecting rod 261 and close to the edge, and the second rotating rod 262 is rotationally connected with the first fixed frame 23, and the first connecting rod 261 swings about the second rotating rod 262 as the fulcrum. The end of the first connecting rod 261 close to the second rotating rod 262 is rotationally connected with the reciprocating push rod 22 through a hinge, and the displacement of the reciprocating push rod 22 in the vertical direction can drive the first connecting rod 261 to swing about the second rotating rod 262 as the fulcrum. The limiting rod 263 is inserted into the outer side of the first connecting rod 261 and close to the center, for limiting the swing range of the first connecting rod 261. The second connecting rod 264 is rotationally installed at the end of the first connecting rod 261 away from the second rotating rod 262. The first connecting seat 265 is rotationally installed at the end of the second connecting rod 264 away from the first connecting rod 261, and the first connecting seat 265 is fixedly installed on the outer side wall of the curved clamping plate 25. By controlling the displacement of the reciprocating push rod 22, the first connecting rod 261 is driven to swing, and then through the linkage of the first connecting rod 261 and the second connecting rod 264, the curved clamping plate 25 is driven to swing about the first rotating rod 24 as the fulcrum, and then the two curved clamping plates 25 on both sides of the paper cup mold 28 are opened and closed, so that the curved clamping plate 25 can bend the cup body 51, and then the inner side wall of the cup body 51 can be attached to the outer side wall of the paper cup mold 28, so as to facilitate the cup body 51 to form a cylindrical structure, and then assist the pressing mechanism 3 to perform hot pressing sealing treatment on the cup body 51, and realize the splicing of the cup body 51.

[0023] When the cup body 51 of the paper cup is subjected to the hot-press sealing process, the plate piece of the cup body 51 is conveyed to the workbench 12 and close to the position of the bending mechanism 2, the plate piece of the cup body 51 is located directly below the paperboard mold, and the displacement end of the driving assembly 21 drives the reciprocating push rod 22 to reciprocate in the vertical direction. When the reciprocating push rod 22 is displaced downward, the reciprocating push rod 22 drives the first connecting rod 261 to swing through the connection of one end of the reciprocating push rod 22 and the first connecting rod 261, the first connecting rod 261 swings around the second rotating rod 262 as the fulcrum, and then the first connecting rod 261 drives the second connecting rod 264 to move, so that the second connecting rod 264 can drive the first connecting seat 265 and the curved clamping plate 25 to move, and the curved clamping plate 25 swings around the first rotating rod 24 as the fulcrum. Therefore, when the reciprocating push rod 22 is displaced downward, the two curved clamping plates 25 swing synchronously. The end of the curved clamping plate 25 away from the first rotating rod 24 synchronously approaches the direction of the paper cup mold 28, and then the curved clamping plate 25 is folded. In the process of folding, the curved clamping plate 25 pushes the plate piece of the cup body 51 to fit with the outer side wall of the paper cup mold 28, the cup body 51 is surrounded by the outer side wall of the paperboard mold to form a cylindrical structure, and then the pressure mechanism 3 is used to heat-press seal the position of the splicing seam of the cup body 51, and the plate piece of the cup body 51 is spliced into a cylindrical structure.

[0024] Reference Figure 5 , Figure 6 and Figure 7The second linkage assembly 27 comprises a toggle plate 271, a second connecting seat 272, a third connecting rod 273, a third connecting seat 274, a fourth connecting rod 275, a fourth connecting seat 276, a fifth connecting rod 277 and a fifth connecting seat 278. A U-shaped through slot is formed in the position close to the edge of one of the curved clamping plates 25, the toggle plate 271 is rotatably installed in the U-shaped through slot formed in the curved clamping plate 25, and the toggle plate 271 can rotate on the inner side of the curved clamping plate 25. The second connecting seat 272 is fixedly installed on the outer side wall of the toggle plate 271 in the position close to the edge, and the second connecting seat 272 is located on the side surface of the toggle plate 271 away from the paperboard mold. The third connecting rod 273 is rotatably installed at one end of the second connecting seat 272 away from the toggle plate 271, and the third connecting rod 273 is rotatably connected with the second connecting seat 272. The third connecting seat 274 is rotatably installed on the outer side of the third connecting rod 273 in the position close to the center through a torsional spring, and the third connecting rod 273 is rotatably connected with the third connecting seat 274. One end of the third connecting seat 274 away from the third connecting rod 273 is fixedly connected with the outer side wall of the curved clamping plate 25. The fourth connecting rod 275 is rotatably installed at one end of the third connecting rod 273 close to the third connecting seat 274, and the fourth connecting rod 275 is rotatably connected with the third connecting rod 273. The third connecting rod 273 is divided into two parts with the third connecting seat 274 as a dividing point, the part between the third connecting seat 274 and the second connecting seat 272 is defined as the major axis of the third connecting rod 273, and the part between the fourth connecting rod 275 and the third connecting seat 274 is defined as the minor axis of the third connecting rod 273. The swing path of the end of the major axis is longer than that of the end of the minor axis. The small-amplitude swing of the minor axis can drive the major axis to swing with large amplitude. In the initial state, the torsional spring makes the third connecting rod 273 in an inclined state, and the torsional spring controls the third connecting rod 273 to exert a pushing force on the lower end of the toggle plate 271, so that the inner side wall of the toggle plate 271 is flush with the inner side wall of the curved clamping plate 25. The fourth connecting seat 276 is fixedly installed on the outer side wall of the first connecting seat 265, one end of the fourth connecting seat 276 is rotatably connected with the fourth connecting rod 275, and the fourth connecting rod 275 can swing with the connecting point of the fourth connecting rod 275 and the fourth connecting seat 276 as a fulcrum. The fifth connecting rod 277 is rotatably installed at one end of the fourth connecting rod 275 away from the third connecting rod 273. The fifth connecting seat 278 is fixedly installed on the outer side wall of the second connecting rod 264, and one end of the fifth connecting seat 278 is rotatably connected with the fifth connecting rod 277. Thus, the second connecting rod 264 drives the fifth connecting seat 278 to move in the circumferential direction when swinging, the fifth connecting seat 278 drives the fifth connecting rod 277 to displace, thereby driving the fourth connecting rod 275 to swing, the swing of the fourth connecting rod 275 drives the third connecting rod 273 to swing, the torsional spring is deformed, thereby the swing of the third connecting rod 273 drives the toggle plate 271 to swing, the toggle plate 271 swings and inclines, and the upper end of the toggle plate 271 swings toward the direction of the paperboard mold.

[0025] In the process of the curved clamping plate 25 pushing the cup body 51, the relative rotation of the second connecting rod 264 and the first connecting seat 265 will drive the fifth connecting rod 277 to rotate, the fifth connecting rod 277 pushes the fourth connecting rod 275, and the fourth connecting rod 275 rotates with the connecting point of the fourth connecting seat 276 and the fourth connecting rod 275 as the fulcrum. The end of the fourth connecting rod 275 connected with the third connecting rod 273 will press the third connecting rod 273, so that the end of the third connecting rod 273 connected with the fourth connecting rod 275 swings towards the curved clamping plate 25. In turn, the end of the third connecting rod 273 connected with the second connecting seat 272 swings away from the curved clamping plate 25. When the third connecting rod 273 drives the second connecting seat 272 to swing away from the curved clamping plate 25, the push plate 271 moves with the second connecting seat 272, the lower end of the push plate 271 swings towards the second connecting seat 272, and at the same time, the upper end of the push plate 271 swings towards the paper cup mold 28. At this time, the upper end of the push plate 271 protrudes to the inner side of the curved clamping plate 25, and in turn, the part of the cup body 51 in contact with the push plate 271 further approaches the paper cup mold 28. The inner pad layer 52 is pasted at the end of the cup body 51 in contact with the push plate 271, so that the inner pad layer 52 contacts the outer side wall of the paper cup mold 28 earlier than the outer pad layer 53, and therefore, the inner pad layer 52 will be located below the outer pad layer 53 when the cup body 51 is folded. The inner pad layer 52 can be pasted on the inner side wall of the cylindrical structure surrounded by the cup body 51, and the outer pad layer 53 can be pasted on the outer side wall of the cylindrical structure surrounded by the cup body 51.

[0026] Reference Figure 2 , Figure 3 , Figure 8 , Figure 9 and Figure 10The pressing mechanism 3 comprises a second fixed frame 31, a heater 32, a fixed plate 33, buffer rods 331 and a hot pressing head 34. The second fixed frame 31 is fixedly installed at the upper end of the workbench 12 and close to the paper cup mold 28. The heater 32 is fixedly installed at the inner side of the second fixed frame 31 and close to the center. The buffer rods 331 are fixedly installed at the lower end of the heater 32 and close to the edge, and a plurality of buffer rods 331 are uniformly distributed along the circumference of the heater 32. The fixed plate 33 is fixedly installed at the lower end of the buffer rods 331, and the heater 32 and the fixed plate 33 are spaced apart to allow the buffer rods 331 to extend and retract. The hot pressing head 34 comprises a middle push rod 341, a spring telescopic rod 342, a middle hot pressing plate 343, a side hot pressing plate 344 and an elastic heat-resistant pad layer 345. The middle push rod 341 is fixedly installed at the lower end of the fixed plate 33 and close to the center, and a plurality of middle push rods 341 are uniformly distributed along the length direction of the fixed plate 33. The middle hot pressing plate 343 is fixedly installed at the lower end of the middle push rod 341. The spring telescopic rod 342 is fixedly installed at the lower end of the fixed plate 33 and close to the edge, and a plurality of spring telescopic rods 342 are uniformly distributed along the length direction of the fixed plate 33. The side hot pressing plate 344 is fixedly installed at the lower end of the spring telescopic rod 342. The two side hot pressing plates 344 are symmetrically distributed about the middle hot pressing plate 343. The elastic heat-resistant pad layer 345 is sleeved on the outer side of the side hot pressing plate 344, and the middle hot pressing plate 343 and the side hot pressing plate 344 are located on the inner side of the elastic heat-resistant pad layer 345. The middle hot pressing plate 343 can be fitted into the groove on the outer side wall of the paperboard mold.

[0027] When the curved clamping plate 25 pushes the plate of the cup body 51, the second fixed frame 31 drives the hot pressing head 34 to displace downward. Since the end of the cup body 51 with the inner gasket 52 is in contact with the outer side wall of the paper cup mold 28 earlier than the other end due to the pushing of the actuating plate 271, the elastic heat-resistant gasket 345 on the outer side of the hot pressing head 34 will first contact the end of the cup body 51 with the outer gasket 53. The elastic heat-resistant gasket 345 displaces downward along with the second fixed frame 31, and then abuts the cup body 51 against the outer side wall of the paperboard mold. At this time, the inner gasket 52 abuts against the outer side wall of the paperboard mold, the two ends of the cup body 51 are connected at the upper end of the inner gasket 52, the inner gasket 52 abuts against the inner side wall of the cup body 51, and the outer gasket 53 abuts against the outer side wall of the cup body 51. The hot pressing head 34 continues to displace downward, at this time, the side hot pressing plate 344 abuts against the outer gasket 53, and the spring telescopic rod 342 is compressed. While the middle pushing rod 341 and the middle hot pressing plate 343 continue to displace downward, the middle hot pressing plate 343 is embedded into the rectangular groove on the outer side wall of the paper cup mold 28, the elastic heat-resistant gasket 345 is deformed by being extruded by the middle hot pressing plate 343, so that the outer side wall of the elastic heat-resistant gasket 345 completely adheres to the surface of the outer gasket 53. When the elastic heat-resistant gasket 345 is embedded into the groove on the outer side wall of the paper cup mold 28, the position of the cup body 51 near the splicing joint on the outer side is bent, and then a U-shaped groove matching the paperboard mold is extruded on the outer side of the cup body 51, and the outer gasket 53 can be completely embedded into the U-shaped groove on the outer side wall of the cup body 51. The outer side wall of the outer gasket 53 is flush with the exposed part of the outer side wall of the cup body 51. The middle hot pressing plate 343 and the side hot pressing plate 344 are heated by the heater 32, the high-temperature part of the cup body 51 is high-temperature shaped, the inner gasket 52 is melted and adhered to the other end of the cup body 51, and the outer gasket 53 is melted and adhered to the other end of the cup body 51. The inner gasket 52, the outer gasket 53 and the cup body 51 form a closely adhered whole.

[0028] A hot pressing sealing method based on the above-mentioned hot pressing sealing device for moisture-proof paper cups, comprising the following steps: S1. Attaching gaskets, before hot pressing and splicing the cup body 51, adhering the outer gasket 53 to one end of the unfolded surface of the cup body 51, adhering the inner gasket 52 to the other end of the unfolded surface of the cup body 51, and then placing the cup body 51 to be spliced in the placing frame 11; S2. Bending the cup body 51, placing the cup body 51 to be spliced on the workbench 12, controlling the reciprocating pushing rod 22 to reciprocate in the vertical direction by the driving assembly 21, driving the first connecting rod 261 to swing, and then controlling the opening and closing of the curved clamping plate 25 by the first linkage assembly 26, so that the curved clamping plate 25 bends the cup body 51, and the inner side wall of the cup body 51 can adhere to the outer side wall of the paper cup mold 28; S3. The cup body 51 is attached, and when the first linkage assembly 26 drives the curved clamping plate 25 to open and close, the circumferential rotation of the first connecting seat 265 can control the movement of the second linkage assembly 27, the second linkage assembly 27 controls the swing of the toggle plate 271, and when the curved clamping plate 25 bends the cup body 51, the toggle plate 271 can further push one end of the cup body 51 with the inner gasket layer 52, so that one end of the cup body 51 with the inner gasket layer 52 is attached to the paper cup mold before the other end; S4. Hot pressing splicing, after the side heat pressing plate 344 abuts against the cup body 51, the inner gasket layer 52 is located below the outer gasket layer 53, the middle heat pressing plate 343 continues to move downward, the middle heat pressing plate 343 is inserted into the groove on the outer side wall of the paper cup mold 28, and the elastic heat-resistant gasket layer 345 is attached to the outer side wall of the outer gasket layer 53, so that the outer gasket layer 53 is completely embedded in the groove on the outer side wall of the cup body 51, the outer side wall of the outer gasket layer 53 is flush with the outer side wall of the cup body 51, and the hot pressing splicing of the cup body 51 is completed.

[0029] A hot pressing sealing and reinforcing process of a moisture-proof paper cup: through the side heat pressing plate and the middle heat pressing plate 343 inside the hot pressing head 34, the outer side wall of the cup body 51 is segmentedly extruded and close to the splicing joint, a U-shaped groove is bent out on the outer side wall of the cup body 51 and close to the splicing joint, the outer gasket layer 53 is completely embedded in the groove on the outer side wall of the cup body 51, the splicing joint of the cup body 51 is sealed by the outer gasket layer 53, the area of the protrusion of the outer side wall of the cup body 51 is reduced, the possibility of the splicing joint of the cup body 51 being warped is reduced, the possibility of the splicing joint of the cup body 51 being cracked and opening is reduced, and the moisture-proof and leakage-proof effect of the cup body 51 is improved. Similarly, the inner gasket layer 52 is attached to the inner side wall of the cup body 51 and close to the splicing joint, and the area of the exposure of the splicing joint of the cup body 51 is also reduced, and the possibility of the splicing joint of the cup body 51 being cracked and opening is reduced.

[0030] The working principle of the embodiment of the application is as follows: Before the cup body 51 is hot pressed and sealed, a part of the inner gasket layer 52 is pasted on one end of the cup body 51, a part of the outer gasket layer 53 is pasted on the other end of the cup body 51, and the processed cup body 51 plate is stacked on the inner side of the placing rack 11; In the hot-pressing sealing process, the plate of the cup body 51 is conveyed to the lower side of the paperboard mold. The driving assembly 21 drives the reciprocating push rod 22 to move downward, and then the first connecting rod 261 and the second connecting rod 264 are moved. The second connecting rod 264 drives the curved clamping plate 25 to swing, so that the curved clamping plate 25 swings, and then the two curved clamping plates 25 can be gathered to the direction of the paperboard mold. The curved clamping plate 25 pushes the cup body 51 to adhere to the outer side wall of the paperboard mold. When the second connecting rod 264 moves, the third connecting rod 273 is pushed by the second connecting rod 264, and then the fourth connecting rod 275 and the fifth connecting rod 277 are moved, and then the toggle plate 271 is driven to rotate. The end of the cup body 51 with the inner gasket 52 is further pushed to the direction of the paperboard mold by the rotation of the toggle plate 271, so that it contacts the paper cup mold 28 before the outer gasket 53. The second fixed frame 31 drives the hot-pressing head 34 to displace to the direction of the paperboard mold. The elastic heat-resistant gasket 345 extrudes the outer gasket 53, so that the outer gasket 53 extrudes the cup body 51 downward, and the cup body 51 extrudes the inner gasket 52 downward. After the side hot-pressing plate 344 abuts against the outer gasket 53, the spring telescopic rod 342 is compressed, and the middle hot-pressing plate 343 continues to displace to the direction of the paper cup mold 28. The middle hot-pressing plate 343 is inserted into the groove on the outer side wall of the paper cup mold 28, and then a groove is bent out at the position on the outer side of the cup body 51 close to the splicing joint. The outer gasket 53 is completely embedded in the groove on the outer side of the cup body 51. The high-temperature part of the cup body 51 is high-temperature shaped by the heater 32, and the outer gasket 53 and the inner gasket 52 are melted by high temperature, so that the inner gasket 52, the outer gasket 53 and the cup body 51 form a tightly adhered and sealed whole. Finally, the demolding mechanism is used for demolding the paper cup body.

[0031] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A heat-sealing device for moisture-proof paper cups, comprising a base (1), wherein a worktable (12) is provided at the upper end of the base (1), and a placement rack (11) is provided on the worktable (12), characterized in that, A bending mechanism (2) is provided at the upper end of the workbench (12) and near the placement rack (11). A pressing mechanism (3) is provided at the upper end of the workbench (12) and near the bending mechanism (2). The bending mechanism (2) includes a drive assembly (21) fixed to the lower end of the workbench (12). A reciprocating push rod (22) is provided on the drive assembly (21). A first rotating rod (24) is provided at the upper end of the reciprocating push rod (22). A curved clamping plate (25) is provided on the outer side of the first rotating rod (24) and near the center. A first fixing frame (23) is provided at the lower end of the workbench (12) and near the first rotating rod (24). A curved clamping plate (25) is provided on the inner side of the first fixing frame (23) and near the curved clamping plate (25). A first linkage component (26) is provided at position 25. The first linkage component (26) is used to control the opening and closing of the curved clamp (25). A second linkage component (27) is provided on the outside of the first linkage component (26). A paper cup mold (28) for processing the paper cup body (5) is provided at the upper end of the workbench (12) and near the curved clamp (25). The paper cup body (5) includes a cup body (51). An inner pad (52) is provided on the inner side wall of the cup body (51) and near the splice seam. An outer pad (53) is provided on the outer side wall of the cup body (51) and near the splice seam. A demolding mechanism (4) is provided at the upper end of the workbench (12) and near the paper cup mold (28).

2. The heat-sealing device for a moisture-proof paper cup according to claim 1, characterized in that, The first linkage assembly (26) includes a first connecting rod (261) rotatably connected to the reciprocating push rod (22). The first connecting rod (261) has a second rotating rod (262) at one end near the reciprocating push rod (22). The second rotating rod (262) is inserted into the first fixed frame (23). The first connecting rod (261) has a second connecting rod (264) at one end away from the second rotating rod (262). The second connecting rod (264) has a first connecting seat (265) at one end near the curved clamp (25). The first connecting seat (265) is fixedly connected to the curved clamp (25). A limit rod (263) is inserted into the first connecting rod (261). A second linkage assembly (27) is provided on the inner side of one of the curved clamps (25) near the edge.

3. The heat-sealing device for a moisture-proof paper cup according to claim 2, characterized in that, The second linkage component (27) includes a toggle plate (271) installed inside one of the curved clamps (25). The toggle plate (271) is rotatably connected to the curved clamps (25). A second connecting seat (272) is provided on the outer side of the toggle plate (271) and near the first connecting seat (265). A third connecting rod (273) is provided at one end of the second connecting seat (272). A fourth connecting rod (275) is provided at one end of the third connecting rod (273). A third connecting seat (274) is provided on the outer side of the third connecting rod (273) and near the fourth connecting rod (275). A fourth connecting seat (276) is provided on the outer side of the fourth connecting rod (275) and near the center. A fifth connecting rod (277) is provided at one end of the fourth connecting rod (275). A fifth connecting seat (278) is provided at one end of the fifth connecting rod (277). The fifth connecting seat (278) is fixedly installed on the outer side of the first connecting seat (265).

4. The heat-sealing device for a moisture-proof paper cup according to claim 3, characterized in that, The third link (273) and the third connecting seat (274) are rotatably connected by a torsion spring. The inner wall of the actuating plate (271) is flush with the inner wall of the curved clamp (25). The distance between one end of the third link (273) and the outer wall of the curved clamp (25) is greater than the distance between the other end of the third link (273) and the outer wall of the curved clamp (25). The end of the third link (273) with the smaller distance from the outer wall of the curved clamp (25) is connected to the fourth link (275).

5. The heat-sealing device for a moisture-proof paper cup according to claim 4, characterized in that, The inner padding layer (52) is fixedly pasted to one end of the cup body (51) after it is unfolded, which is close to the toggle plate (271). The outer padding layer (53) is fixedly pasted to the other end of the cup body (51) after it is unfolded. The width of the inner padding layer (52) is greater than the width of the outer padding layer (53).

6. The heat-sealing device for a moisture-proof paper cup according to claim 5, characterized in that, The cup body (51) fitted onto the paper cup mold (28) is located below the pressing mechanism (3). The pressing mechanism (3) includes a second fixing frame (31), which is installed on the upper end of the workbench (12) and close to the cup body (51). A heater (32) is provided on the outer side of the second fixing frame (31) and close to the center, which is located directly above the cup body (51) to be processed. A fixing plate (33) is provided at the lower end of the second fixing frame (31) and close to the heater (32). A buffer rod (331) is provided at the lower end of the fixing plate (33), and a hot press head (34) is provided at the lower end of the buffer rod (331).

7. The heat-sealing device for a moisture-proof paper cup according to claim 6, characterized in that, The hot press head (34) includes a central push rod (341), and a central hot press plate (343) is provided at the lower end of the central push rod (341). Side hot press plates (344) are provided on both sides of the central hot press plate (343). The two side hot press plates (344) are symmetrically distributed about the central hot press plate (343). A spring telescopic rod (342) is provided at the upper end of the side hot press plate (344). The side hot press plate (344) is flush with the lower end face of the central hot press plate (343). An elastic heat-resistant pad (345) is provided on the outer side of the side hot press plate (344). The elastic heat-resistant pad (345) is sleeved on the outer side of the side hot press plate (344).

8. The heat-sealing device and sealing method for a moisture-proof paper cup according to claim 7, characterized in that, Includes the following steps, S1. Attach padding layer: Before hot pressing splicing the cup body (51), attach an outer padding layer (53) to one end of the unfolded surface of the cup body (51) and an inner padding layer (52) to the other end of the unfolded surface of the cup body (51). Then place the cup body (51) to be spliced ​​in the placement rack (11). S2. The cup body (51) is bent. The cup body (51) to be assembled is laid on the workbench (12). The drive component (21) controls the reciprocating push rod (22) to reciprocate in the vertical direction. The reciprocating push rod (22) drives the first connecting rod (261) to swing. Then, the first linkage component (26) controls the opening and closing of the curved clamp (25) so that the curved clamp (25) bends the cup body (51) so that the inner side wall of the cup body (51) can fit against the outer side wall of the paper cup mold (28). S3. When the cup body (51) is in contact with the first linkage component (26) and the curved clamp (25) is opened and closed, the circumferential rotation of the first connecting seat (265) can control the movement of the second linkage component (27). The second linkage component (27) controls the swing of the actuating plate (271). While the curved clamp (25) bends the cup body (51), the actuating plate (271) can further push the end of the cup body (51) with the inner padding layer (52), so that the end of the cup body (51) with the inner padding layer (52) is in contact with the cardboard mold before the other end. S4. Hot pressing splicing: After the side hot pressing plate (344) abuts against the cup body (51), the inner pad (52) is located below the outer pad (53), the middle hot pressing plate (343) continues to move down, the middle hot pressing plate (343) is inserted into the groove on the outer wall of the paper cup mold (28), the elastic heat-resistant pad (345) is attached to the outer wall of the outer pad (53), so that the outer pad (53) is completely embedded in the groove on the outer wall of the cup body (51), so that the outer wall of the outer pad (53) is flush with the outer wall of the cup body (51), thus completing the hot pressing splicing of the cup body (51).

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