Hydraulic forming machine for anti-deformation paper cup sheet and using method

Abstract

The invention provides a hydraulic forming machine for anti-deformation paper cup pieces and a using method, and belongs to the technical field of paper cup production, the hydraulic forming machine comprises a machine base, a forming assembly and an edge sealing assembly, the forming assembly and the edge sealing assembly are arranged on the machine base, symmetrical baffles are arranged on the outer wall of one side of the machine base, and a plurality of supporting legs are arranged at the lower end of the machine base. According to the paper cup edge sealing device, before edge sealing is conducted on a cup body through the edge sealing assembly, a powerful negative pressure area can be formed around the air suction holes, evenly-distributed adsorption force is generated on the surface of the forming roller, and the paper cup piece can be firmly adsorbed to the whole contact face of the forming roller through the adsorption force; and each fine area of the paper cup sheet is ensured to be in close contact with the roller surface, and any tiny gap between the fine area and the roller surface is completely eliminated. The tight pressing effect can effectively prevent various appearance quality problems such as cup body wrinkles, internal bubbles and surface recesses in the forming process, so that the laminating precision of the paper cup is remarkably improved, various potential forming defects are thoroughly eliminated, and the subsequent product quality is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of paper cup production technology, and more specifically, to a hydraulic forming machine for anti-deformation paper cup sheets and its usage method. Background Technology

[0002] Against the backdrop of increasing global environmental awareness, disposable paper products have seen a continuous growth in market demand due to their biodegradable and environmentally friendly characteristics. Paper cups, as a widely used disposable paper product in daily life, are often used for beverages and other scenarios. Their quality is directly related to user experience and safety. As the core raw material for paper cup production, the forming quality of paper cup sheets is a key factor determining the final quality of the paper cup.

[0003] In existing technologies, bending paper cup sheets into cup bodies is an indispensable step in the production of deformation-resistant paper cups. However, in the current cup forming process, after the paper cup sheet is bent and adhered to the forming roller by forming claws, it is directly heat-sealed at the joint by a hot-pressing mechanism. This process cannot guarantee that the cup body is completely adhered to the forming roller, resulting in tiny gaps between them. This leads to wrinkles and dents in the cup body after forming, affecting the quality of subsequent products. Therefore, inventing a hydraulic forming machine for deformation-resistant paper cup sheets and its usage method to solve these problems has become an urgent issue for those skilled in the art. Summary of the Invention

[0004] To overcome the above deficiencies, this invention provides a hydraulic forming machine and method for making anti-deformation paper cup sheets. It aims to solve the problem that in the existing cup forming process, it is impossible to ensure that the cup body is completely attached to the forming roller, resulting in a small gap between the two. This causes wrinkles and dents in the cup body after forming, affecting the quality of subsequent products.

[0005] This invention is implemented as follows:

[0006] This invention provides a hydraulic forming machine for anti-deformation paper cup sheets and a method of using it, including a machine base and forming components and sealing components arranged on the machine base. Symmetrical baffles are provided on one outer wall of the machine base, and multiple support legs are provided at the lower end of the machine base.

[0007] The forming component is installed inside the machine base, and the forming component bends and shapes the paper cup sheet;

[0008] The edge sealing assembly is installed on the top of the machine base, and the edge sealing assembly seals the edges of the formed cup body.

[0009] Preferably, the molding assembly includes a positioning block, a first spring, a guide rod, an adjusting plate, a molding claw, a rotating shaft, a pull rope, and a hydraulic cylinder. The bottom end of the positioning block has symmetrical grooves. One end of the guide rod is fixedly connected to the inner wall of the groove, and the inner wall of the adjusting plate is slidably connected to the outer wall of the guide rod.

[0010] Preferably, a limit block is fixedly connected to one end of the guide rod that passes through the adjusting plate. The first spring is sleeved on the outside of the guide rod. The two side walls of the first spring are fixedly connected to the inner wall of the groove and one side outer wall of the adjusting plate, respectively. Two sets of symmetrical connecting rods are provided on the two outer walls of the adjusting plate. A toothed rod is fixedly connected to one end of the connecting rod. The hydraulic cylinder is installed at the lower end of the machine base. The telescopic end of the hydraulic cylinder is fixedly connected to the lower outer wall of the adjusting plate.

[0011] Preferably, the two forming claws are installed on both sides of the adjusting plate. A fixed shaft is fixedly connected to the inner wall of one end of the forming claw. The two ends of the fixed shaft are rotatably connected to the inner wall of the machine base. A first pulley is fixedly connected to the side walls of both ends of the fixed shaft. The two rotating shafts are arranged below the fixed shaft. The two ends of the rotating shaft are rotatably connected to the inner wall of the machine base. A gear and a second pulley are fixedly connected to the side walls of both ends of the rotating shaft, respectively.

[0012] Preferably, the gear and the rack are meshed together, and a pull rope is provided between the second pulley and the first pulley. The pull rope is crisscrossed and tied between the two pulleys, and the two ends of the pull rope are fixedly connected to the inner sidewalls of the first pulley and the second pulley, respectively.

[0013] Preferably, the edge sealing assembly includes a fixed plate, a heating block, a second spring, a cylinder, a forming roller, a piston sleeve, a sliding plate, a fixed sleeve, and a piston rod. The fixed plate has connecting plates on both sides that are fixedly connected to the side wall of the machine base, and an ear plate is fixedly connected to the lower end of the fixed plate.

[0014] Preferably, the side wall of the heating block is fixedly connected to two sets of symmetrical fixing blocks, the upper end of the fixing block is fixedly connected to a slide rod that is slidably connected to the inner wall of the fixing plate, the upper end of the slide rod is fixedly connected to a stop block, the second spring is sleeved on the outside of the slide rod, the two end side walls of the second spring are fixedly connected to the stop block and the outer wall of the fixing block respectively, and the upper end of the heating block is designed with a slope.

[0015] Preferably, the cylinder is fixedly connected to the lower outer wall of the fixed plate, and an extrusion block is fixedly connected to the side wall of the telescopic end of the cylinder. The lower end of the extrusion block is designed with an inclined surface. A top block is fixedly connected to one end of the telescopic end of the cylinder. A fixing rod is provided on the side wall of the forming roller and fixedly connected to the lower end of the fixed plate. A cavity is opened inside the forming roller. Several air intake holes are opened on the side wall of the cavity. An air vent is opened at one end of the cavity. Both ends of the piston sleeve are fixedly connected to the inner wall of the cavity. Multiple through grooves are opened on the side wall of one end of the piston sleeve.

[0016] Preferably, one side of the outer wall of the slide plate is fixedly connected to one end of the fixed sleeve and the piston rod, a third spring is fixedly connected to the outer wall of the slide plate near the fixed sleeve, the inner wall of the fixed sleeve is slidably connected to the outer wall of the top block, the outer wall of the piston rod is fixedly connected to the inner wall of the piston, the outer wall of the piston is slidably connected to the inner wall of the piston sleeve, and the outer wall of the piston rod is slidably connected to the inner wall of the forming roller.

[0017] A method for using a hydraulic forming machine for anti-deformation paper cup sheets includes the following steps:

[0018] S1: First, the paper cup sheets to be processed are placed in the designated position on the machine base through the feeding device and positioned by the baffle;

[0019] S2: Next, the hydraulic cylinder is activated to extend and push the forming component upward. The paper cup sheet is then positioned and attached by the positioning block and the forming roller. After that, the forming claw is driven to press the paper cup sheet so that it is tightly attached to the surface of the forming roller.

[0020] S3: Then, the drive cylinder extends, pushing the slide plate and piston rod on one side to move. During the movement, the suction holes on the outer surface of the forming roller tightly adsorb the paper cup sheet through negative pressure, preventing it from shifting or deforming in subsequent operations.

[0021] S4: Finally, under the action of mechanical transmission, the heating block 32 gradually approaches the seam of the paper cup sheet and performs heat pressing treatment on the seam through high temperature and pressure. During this process, the spring assembly and the sliding structure cooperate with each other to ensure that the movement of the heating block is smooth and precise.

[0022] The beneficial effects of this invention are:

[0023] Before sealing the cup body, the sealing component creates a strong negative pressure area around the suction hole, generating a uniformly distributed adsorption force on the forming roller surface. This adsorption force firmly adheres the paper cup sheet to the entire contact surface of the forming roller, ensuring that every tiny area of ​​the paper cup sheet maintains tight contact with the roller surface, completely eliminating any microscopic gaps between them. This tight bonding effect effectively prevents various appearance quality problems such as cup wrinkles, internal air bubbles, and surface dents during the forming process, thereby significantly improving the bonding accuracy of the paper cup, completely eliminating various potential forming defects, and ensuring the quality of subsequent products. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a hydraulic forming machine and its usage method for anti-deformation paper cup sheets provided by an embodiment of the present invention;

[0026] Figure 2 This is another schematic diagram of a hydraulic forming machine and its usage method for anti-deformation paper cup sheets provided by an embodiment of the present invention;

[0027] Figure 3 This is a half-sectional view of the structure of a hydraulic forming machine and its usage method for anti-deformation paper cup sheets provided by an embodiment of the present invention;

[0028] Figure 4 This invention provides a hydraulic forming machine for anti-deformation paper cup sheets and its usage method. Figure 3 Enlarged view of the structure of region A in the middle;

[0029] Figure 5 This is a schematic diagram of the forming components in a hydraulic forming machine and its usage method for anti-deformation paper cup sheets provided by an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the edge sealing component in a hydraulic forming machine and method for using anti-deformation paper cup sheets provided in an embodiment of the present invention;

[0031] Figure 7 This is a half-sectional view of the edge sealing component structure in a hydraulic forming machine and its usage method for anti-deformation paper cup sheets provided by an embodiment of the present invention.

[0032] In the diagram: 1. Machine base; 11. Baffle; 2. Forming assembly; 21. Positioning block; 211. Groove; 22. First spring; 23. Guide rod; 231. Limiting block; 24. Adjusting plate; 241. Connecting rod; 242. Gear rack; 25. Forming claw; 251. Fixed shaft; 252. First pulley; 26. Rotating shaft; 261. Gear; 262. Second pulley; 27. Pull rope; 28. Hydraulic cylinder; 3. Edge sealing assembly; 31. Fixed plate; 311. 312 Connecting plate; 32 Ear plate; 32 Heating block; 321 Fixing block; 322 Slide rod; 323 Stop block; 33 Second spring; 34 Cylinder; 341 Top block; 342 Extrusion block; 35 Forming roller; 351 Cavity; 352 Suction hole; 353 Vent hole; 354 ​​Fixing rod; 36 Piston sleeve; 361 Through groove; 37 Slide plate; 38 Fixing sleeve; 381 Third spring; 39 Piston rod; 391 Piston. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1, refer to Figures 1-7 A hydraulic forming machine for anti-deformation paper cup sheets includes a base 1 and a forming component 2 and an edge sealing component 3 disposed on the base 1. A symmetrical baffle 11 is provided on one side outer wall of the base 1, and a plurality of support legs are provided at the lower end of the base 1.

[0035] The forming component 2 is installed inside the base 1, and the forming component 2 bends and shapes the paper cup sheet;

[0036] The edge sealing component 3 is installed on the top of the base 1, and the edge sealing component 3 seals the edges of the formed cup body.

[0037] Further; the molding component 2 includes a positioning block 21, a first spring 22, a guide rod 23, an adjusting plate 24, a molding claw 25, a rotating shaft 26, a pull rope 27, and a hydraulic cylinder 28. The bottom end of the positioning block 21 has symmetrical grooves 211. One end of the guide rod 23 is fixedly connected to the inner wall of the groove 211. The inner wall of the adjusting plate 24 is slidably connected to the outer wall of the guide rod 23. One end of the guide rod 23 passes through the adjusting plate 24 and is fixedly connected to a limit block 231. The first spring 22 is sleeved on the outside of the guide rod 23. The two end sidewalls of the first spring 22 are fixedly connected to the inner wall of the groove 211 and one side outer wall of the adjusting plate 24, respectively. Two sets of symmetrical connecting rods 241 are provided on both sides of the outer wall of the adjusting plate 24. One end of the connecting rod 241 is fixedly connected to a toothed rod 242. The hydraulic cylinder 28 is installed at the lower end of the machine base 1. The telescopic end of 8 is fixedly connected to the lower outer wall of the adjusting plate 24. Two forming claws 25 are installed on both sides of the adjusting plate 24. A fixed shaft 251 is fixedly connected to the inner wall of one end of the forming claw 25. The two ends of the fixed shaft 251 are rotatably connected to the inner wall of the machine base 1. The two side walls of the fixed shaft 251 are fixedly connected to the first pulley 252. Two rotating shafts 26 are set below the fixed shaft 251. The two ends of the rotating shaft 26 are rotatably connected to the inner wall of the machine base 1. The two side walls of the rotating shaft 26 are respectively fixedly connected to the gear 261 and the second pulley 262. The gear 261 and the rack 242 are meshed. A pull rope 27 is provided between the second pulley 262 and the first pulley 252. The pull rope 27 is tied between the two pulleys in a cross pattern. The two ends of the pull rope 27 are fixedly connected to the inner side walls of the first pulley 252 and the second pulley 262, respectively.

[0038] It should be noted that the paper cup forming and positioning device is reasonably arranged at the adjacent station of the automatic paper cup feeding mechanism. In the actual production process, the automatic feeding mechanism located on one side of the equipment will accurately transport the pre-cut fan-shaped paper cup pieces to the machine base 1. At this time, the limiting baffle 11 set at the end of the machine base 1 will play a key positioning role, ensuring that each paper cup piece can be accurately stopped in the predetermined position. After the paper cup piece is in place, the control system will immediately start the hydraulic cylinder 28. The hydraulic cylinder 28 will achieve rapid vertical upward movement by pushing the adjusting plate 24 and the positioning block 21 above it. The top of the positioning block 21 is designed as a curved surface structure that perfectly matches the outer contour of the forming roller 35. During the upward movement of the positioning block 21, its top curved surface will smoothly lift the paper cup piece on the machine base 1, so that it can perfectly fit with the surface of the rotating forming roller 35 above. This process not only completes the precise positioning of the paper cup piece, but also realizes the preliminary pre-forming process.

[0039] As the hydraulic cylinder 28 continues to work, the racks 242 installed on both sides of the adjusting plate 24 will mesh with the gears 261 on the side during the upward process, causing the rotating shaft 26 to start rotating. This will drive the second pulleys 262 installed at both ends of the rotating shaft 26 to rotate synchronously. The rotation of the second pulleys 262 will gradually tighten the pull rope 27 wrapped around it. The other end of the pull rope 27 is connected to the first pulley 252. This traction effect causes the fixed shaft 251 to drive the forming claws 25 on both sides to rotate synchronously. The inner working surface of the forming claw 25 also adopts a curved surface design that is completely matched with the outer contour of the forming roller 35. When the forming claw 25 rotates under the drive of the pull rope 27, its inner curved surface will apply uniform forming pressure to the paper cup sheet above, so that the paper cup sheet is completely attached to the outer surface of the forming roller 35 and is finally precisely pressed into a cup shape that meets the design requirements.

[0040] In this solution, a single hydraulic cylinder 28 drives the positioning block 21 to rise for initial positioning and pre-forming, and also drives the forming claw 25 to rotate to complete the final forming. This reduces the number of parts, lowers costs, and shrinks the size of the equipment. The positioning and forming processes are driven by the same hydraulic cylinder 28, with smooth and coordinated movements. Only the stroke and speed of a single hydraulic cylinder 28 need to be controlled, shortening the single forming cycle and increasing paper cup production. At the same time, the single hydraulic cylinder 28 reduces energy consumption, reduces failure points, extends the equipment's trouble-free working time, lowers maintenance costs, and ensures stable paper cup forming quality.

[0041] Further; the edge sealing assembly 3 includes a fixing plate 31, a heating block 32, a second spring 33, a cylinder 34, a forming roller 35, a piston sleeve 36, a sliding plate 37, a fixing sleeve 38, and a piston rod 39. The fixing plate 31 has connecting plates 311 fixedly connected to the side walls of the machine base 1 on both sides. An ear plate 312 is fixedly connected to the lower end of the fixing plate 31. Two sets of symmetrical fixing blocks 321 are fixedly connected to the side walls of the heating block 32. The upper ends of the fixing blocks 321 are fixedly connected to... A sliding rod 322 is slidably connected to the inner wall of the fixed plate 31. A stop block 323 is fixedly connected to the upper end of the sliding rod 322. A second spring 33 is sleeved on the outer side of the sliding rod 322. The two end side walls of the second spring 33 are fixedly connected to the stop block 323 and the outer wall of the fixed block 321, respectively. The upper end of the heating block 32 is designed with an inclined surface. A cylinder 34 is fixedly connected to the lower outer wall of the fixed plate 31. A pressing block 342 is fixedly connected to the side wall of the telescopic end of the cylinder 34. The lower end of the pressing block 342 is... The cylinder 34 has a sloping design. One end of the cylinder 34 is fixedly connected to a top block 341. The side wall of the forming roller 35 is provided with a fixing rod 354 that is fixedly connected to the lower end of the fixing plate 31. The forming roller 35 has a cavity 351 inside. The side wall of the cavity 351 has several air intake holes 352. One end of the cavity 351 has an air vent 353. The two ends of the piston sleeve 36 are fixedly connected to the inner wall of the cavity 351. One end of the piston sleeve 36 has several through grooves 361. One side of the outer wall of the slide plate 37 is fixedly connected to one end of the fixing sleeve 38 and the piston rod 39. A third spring 381 is fixedly connected to the outer wall of the slide plate 37 near the fixing sleeve 38. The inner wall of the fixing sleeve 38 is slidably connected to the outer wall of the top block 341. The outer wall of the piston rod 39 is fixedly connected to the inner wall of the piston 391. The outer wall of the piston 391 is slidably connected to the inner wall of the piston sleeve 36. The outer wall of the piston rod 39 is slidably connected to the inner wall of the forming roller 35.

[0042] It should be noted that a heating wire is installed inside the heating block 32. The heating wire generates heat to heat the entire heating block 32. Simultaneously, the lower end of the heating block 32 is a curved surface that fits against the forming roller 35. One sidewall of the paper cup sheet is pre-coated with cured glue. After the paper cup sheet is formed by the forming assembly 2, the cylinder 34 is activated, causing its telescopic end's top block 341 to press against the third spring 381. Simultaneously, this moves the entire fixing sleeve 38. During this movement, the fixing sleeve 38 causes one end of the sliding plate 37 to slide. As the sliding plate 37 slides, its piston rod 39 drives the piston 391 to slide and seal inside the piston sleeve 36. During this sliding process, the space near the vent hole 353 of the piston sleeve 36 is gradually compressed, and excess air escapes through the vent hole 353. 53 is discharged. Conversely, the space at the other end of the piston sleeve 36 increases, allowing air to be drawn in through the through groove 361 to replenish the piston sleeve 36. Simultaneously, air is replenished in the cavity 351 through the suction hole 352. When suction begins, a strong negative pressure area is formed around the suction hole 352. This negative pressure generates a uniformly distributed adsorption force on the surface of the forming roller 35. This adsorption force firmly adheres the paper cup sheet to the entire contact surface of the forming roller 35, ensuring that every tiny area of ​​the paper cup sheet maintains close contact with the roller surface, completely eliminating any tiny gaps between them. This tight pressing effect effectively prevents various appearance quality problems such as cup wrinkles, internal air bubbles, and surface dents during the forming process, thereby significantly improving the bonding accuracy of the paper cup and completely eliminating various potential forming defects.

[0043] Meanwhile, during the initial forming stage of the paper cup sheet, even with slight positional deviations, the uniform radial force generated by the negative pressure adsorption system will automatically correct the issue. This force, using the center of the forming roller 35 as a reference, naturally pulls the paper cup sheet towards the center, ensuring that the edge of the paper cup sheet is perfectly aligned with the reference line of the forming roller 35. This automatic correction mechanism can significantly reduce quality problems such as misalignment of the seam and skewed cup mouth that may occur in subsequent processes, further enhancing the forming stability of the entire cup body and significantly reducing the probability of positioning deviations. In addition, during the critical hot-press sealing process at the seam of the cup body, continuous negative pressure adsorption ensures that the seam of the paper cup sheet always remains in close contact with the forming roller 35. This allows the pressure applied by the sealing component to be evenly transmitted to the entire seam area, completely avoiding the problem of weak sealing caused by local gaps. This results in a smoother and more even seam after pressing, greatly reducing the risk of leakage during the use of the paper cup and thus ensuring the production quality of subsequent products.

[0044] When the cup body is fully attached to the outer surface of the forming roller 35, the suction hole 352 is sealed through the cup body. During the subsequent extension of the cylinder 34, the slide plate 37, the fixed sleeve 38, and the piston rod 39 remain fixed. At the same time, the top block 341 at the telescopic end of the cylinder 34 compresses the third spring 381, causing it to slide in the fixed sleeve 38. Simultaneously, the extrusion block 342 on the outer side of the telescopic end of the cylinder 34 begins to move. During the movement, its lower inclined surface tightly abuts against the upper inclined surface of the heating block 32. As the extrusion block 34... 2. As the heating block 32 slides continuously, it will slowly move downwards until the lower curved surface of the heating block 32 is completely pressed against the seam of the cup body. After a period of hot pressing, the cylinder 34 and the hydraulic cylinder 28 retract. At this time, the bending and forming operation of the entire cup body is completed, and the formed cup body is unloaded through the unloading component on one side. Through the mechanical transmission of a single cylinder 34, the cup body is tightly fitted, while the heating block 32 is driven to complete the hot pressing seal at the seam, reducing the number of parts and lowering the overall production cost.

[0045] Example 2, please refer to Figures 1-7 This embodiment proposes a method for using a hydraulic forming machine for anti-deformation paper cup sheets, including the following steps:

[0046] S1: First, the paper cup sheet to be processed is placed in the designated position of the machine base 1 through the feeding device and positioned by the baffle 11;

[0047] S2: Next, start the hydraulic cylinder 28 to extend and push the forming component 2 to move upward. The positioning block 21 cooperates with the forming roller 35 to attach and position the paper cup sheet. Then, drive the forming claw 25 to press the paper cup sheet so that it is tightly attached to the surface of the forming roller 35.

[0048] S3: Then, the drive cylinder 34 extends, pushing the slide plate 37 and piston rod 39 on one side to move. During the movement, the suction hole 352 on the outer surface of the forming roller 35 tightly adsorbs the paper cup sheet through negative pressure, preventing it from shifting or deforming in subsequent operations.

[0049] S4: Finally, under the action of mechanical transmission, the heating block 32 gradually approaches the seam of the paper cup sheet and performs heat pressing treatment on the seam through high temperature and pressure. During this process, the spring assembly and the sliding structure cooperate with each other to ensure that the movement of the heating block 32 is smooth and precise.

[0050] It should be noted that the specific models and specifications of hydraulic cylinders and pneumatic cylinders need to be selected and determined based on the actual specifications of the device. The specific selection and calculation methods adopt existing technologies in this field, so they will not be described in detail here.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A hydraulic forming machine for anti-deformation paper cup sheets, comprising a machine base (1) and a forming assembly (2) and an edge sealing assembly (3) disposed on the machine base (1), characterized in that, The outer wall of one side of the base (1) is provided with symmetrical baffles (11), and the lower end of the base (1) is provided with multiple support legs; The forming component (2) is installed inside the base (1) and the forming component (2) bends and shapes the paper cup sheet; The edge sealing assembly (3) is installed on the top of the base (1) and the edge sealing assembly (3) seals the edges of the formed cup body.

2. The hydraulic forming machine for anti-deformation paper cup sheets according to claim 1, characterized in that, The molding component (2) includes a positioning block (21), a first spring (22), a guide rod (23), an adjusting plate (24), a molding claw (25), a rotating shaft (26), a pull rope (27), and a hydraulic cylinder (28). The bottom end of the positioning block (21) is provided with a symmetrical groove (211). One end of the guide rod (23) is fixedly connected to the inner wall of the groove (211), and the inner wall of the adjusting plate (24) is slidably connected to the outer wall of the guide rod (23).

3. The hydraulic forming machine for anti-deformation paper cup sheets according to claim 2, characterized in that, The guide rod (23) passes through one end of the adjusting plate (24) and is fixedly connected to a limit block (231). The first spring (22) is sleeved on the outside of the guide rod (23). The two side walls of the first spring (22) are fixedly connected to the inner wall of the groove (211) and the outer wall of one side of the adjusting plate (24), respectively. The two outer walls of the adjusting plate (24) are provided with two sets of symmetrical connecting rods (241). One end of the connecting rod (241) is fixedly connected to a toothed rod (242). The hydraulic cylinder (28) is installed at the lower end of the machine base (1). The telescopic end of the hydraulic cylinder (28) is fixedly connected to the lower outer wall of the adjusting plate (24).

4. The hydraulic forming machine for anti-deformation paper cup sheets according to claim 3, characterized in that, Two forming claws (25) are installed on both sides of the adjusting plate (24). A fixed shaft (251) is fixedly connected to the inner wall of one end of the forming claw (25). The two ends of the fixed shaft (251) are rotatably connected to the inner wall of the machine base (1). The two side walls of the fixed shaft (251) are fixedly connected to the first pulley (252). Two rotating shafts (26) are arranged below the fixed shaft (251). The two ends of the rotating shaft (26) are rotatably connected to the inner wall of the machine base (1). The two side walls of the rotating shaft (26) are respectively fixedly connected to the gear (261) and the second pulley (262).

5. The hydraulic forming machine for anti-deformation paper cup sheets according to claim 4, characterized in that, The gear (261) and the rack (242) are meshed together. A pull rope (27) is provided between the second pulley (262) and the first pulley (252). The pull rope (27) is tied between the two pulleys in a cross pattern. The two ends of the pull rope (27) are fixedly connected to the inner sidewalls of the first pulley (252) and the second pulley (262), respectively.

6. The hydraulic forming machine for anti-deformation paper cup sheets according to claim 1, characterized in that, The edge sealing assembly (3) includes a fixing plate (31), a heating block (32), a second spring (33), a cylinder (34), a forming roller (35), a piston sleeve (36), a sliding plate (37), a fixing sleeve (38), and a piston rod (39). The fixing plate (31) has connecting plates (311) on both sides that are fixedly connected to the side wall of the machine base (1). The lower end of the fixing plate (31) is fixedly connected to an ear plate (312).

7. The hydraulic forming machine for anti-deformation paper cup sheets according to claim 6, characterized in that, The heating block (32) has two sets of symmetrical fixing blocks (321) fixedly connected to its side wall. The upper end of the fixing block (321) is fixedly connected to a slide rod (322) that is slidably connected to the inner wall of the fixing plate (31). The upper end of the slide rod (322) is fixedly connected to a stop block (323). The second spring (33) is sleeved on the outside of the slide rod (322). The two side walls of the second spring (33) are fixedly connected to the outer walls of the stop block (323) and the fixing block (321) respectively. The upper end of the heating block (32) is designed with a slope.

8. The hydraulic forming machine for anti-deformation paper cup sheets according to claim 7, characterized in that, The cylinder (34) is fixedly connected to the lower outer wall of the fixed plate (31). The side wall of the telescopic end of the cylinder (34) is fixedly connected to the extrusion block (342). The lower end of the extrusion block (342) is designed with an inclined surface. One end of the telescopic end of the cylinder (34) is fixedly connected to the top block (341). The side wall of the forming roller (35) is provided with a fixing rod (354) fixedly connected to the lower end of the fixed plate (31). The inside of the forming roller (35) is provided with a cavity (351). The side wall of the cavity (351) is provided with several suction holes (352). One end of the cavity (351) is provided with a vent hole (353). The two ends of the piston sleeve (36) are fixedly connected to the inner wall of the cavity (351). One end of the piston sleeve (36) is provided with multiple through grooves (361).

9. A hydraulic forming machine for anti-deformation paper cup sheets according to claim 8, characterized in that, One side of the outer wall of the slide plate (37) is fixedly connected to one end of the fixed sleeve (38) and the piston rod (39). A third spring (381) is fixedly connected to the outer wall of the slide plate (37) near the fixed sleeve (38). The inner wall of the fixed sleeve (38) is slidably connected to the outer wall of the top block (341). The outer wall of the piston rod (39) is fixedly connected to the inner wall of the piston (391). The outer wall of the piston (391) is slidably connected to the inner wall of the piston sleeve (36). The outer wall of the piston rod (39) is slidably connected to the inner wall of the forming roller (35).

10. A method of using a hydraulic forming machine for anti-deformation paper cup sheets according to any one of claims 1-9, characterized in that, Includes the following steps: S1: First, the paper cup sheet to be processed is placed in the designated position of the machine base (1) through the feeding device and positioned by the baffle (11); S2: Next, start the hydraulic cylinder (28) to extend and push the forming component (2) to move upward. The paper cup sheet is attached and positioned by the positioning block (21) in conjunction with the forming roller (35). Then, drive the forming claw (25) to press the paper cup sheet so that it is tightly attached to the surface of the forming roller (35). S3: Then, the drive cylinder (34) extends, pushing the slide plate (37) and piston rod (39) on one side to move. During the movement, the suction hole (352) on the outer surface of the forming roller (35) tightly adsorbs the paper cup sheet through negative pressure, preventing it from shifting or deforming in subsequent operations. S4: Finally, under the action of mechanical transmission, the heating block 32 gradually approaches the seam of the paper cup sheet and performs heat pressing treatment on the seam through high temperature and pressure. During this process, the spring assembly and the sliding structure cooperate with each other to ensure that the movement of the heating block (32) is smooth and precise.

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