Full-automatic gilding machine for processing plastic cup

Abstract

The application provides a full-automatic gilding machine for processing plastic cups, and belongs to the technical field of plastic cup processing and manufacturing. The full-automatic gilding machine for processing plastic cups comprises a stand, a lifting seat, a printing mechanism capable of loading plastic cups, a hot stamping mechanism for pressing a hot transfer film on the plastic cups and an automatic feeding mechanism for feeding the printing mechanism, the printing mechanism comprises a printing tray, an adjusting square column, a rotating shaft, a blowing air pipe and a positioning rubber sleeve, the rotating shaft is coaxially fixed with the printing tray at the front end, a material changing motor is fixed at the rear end of the adjusting square column, the material changing motor is connected with the rear end of the rotating shaft through a gear set, a plurality of blowing air pipes are evenly arranged on the printing tray in the circumferential direction, the positioning rubber sleeve capable of clamping the plastic cup is sleeved on the blowing air pipe and is rotationally connected with the blowing air pipe, and an air outlet pump capable of air feeding is further fixed on one side of the adjusting square column. The blowing air pipe is connected with the air outlet pump after the printing tray rotates, the plastic cup with completed gilding on the printing tray can be easily blown off, and automatic unloading is completed.

Description

Technical Field

[0001] This invention belongs to the field of plastic cup processing and manufacturing technology, and relates to a fully automatic hot stamping machine for processing plastic cups. Background Technology

[0002] Hot stamping, also known as heat transfer printing, is a common surface treatment process. It involves printing any image onto plain or high-precision paper using heat transfer ink, then heating it to a specific temperature within minutes in a hot stamping machine. This process realistically transfers the image from the paper onto materials such as ceramic cups, plates, tiles, clothing, and metal. Plastic cups typically have a regular ring-shaped surface; applying a ring of metal foil or other materials to the surface makes the cup more aesthetically pleasing and refined. Currently, most hot stamping machines require manual feeding, which can cause burns as workers' hands may come into contact with the hot transfer rollers or plates. To address this issue and improve safety, automatic hot stamping machines with automatic bottle and cup feeding systems have been designed.

[0003] For example, the utility model patent published in China with patent number [201921143163.X] discloses an improved structure for automatic bottle feeding in a heat transfer machine. This structure includes a housing, a reduction gearbox, a large rotating arm, a small rotating arm, a finger cylinder, a connecting plate, a small rotating arm drive mechanism, and a feeding belt. The large rotating arm is driven and connected to the reduction gearbox, while the small rotating arm is movably located at the end of the large rotating arm. The finger cylinder is fixed to the small rotating arm, which is movably connected to the small rotating arm drive mechanism via the connecting plate. The small rotating arm drive mechanism includes a drive motor, a transmission screw, and a vertical guide rail. The rotation of the large rotating arm drives the small rotating arm to move and grasp the bottle, completing the automatic feeding without manual operation. However, this feeding method only uses a mechanical claw to grasp the bottle from the hopper and place it on the feeding belt, transporting it forward along the conveyor belt. It cannot actually install the bottle onto the heat transfer machine.

[0004] For example, the utility model patent published in China with patent number [CN202323058047.7] discloses a fully automatic vertical rotary screen printing machine, including a frame connected to the ground, a feeding conveyor belt and a discharging conveyor belt set on the frame, a material tray set on the frame, and several connecting posts evenly arranged on its surface for mounting the printing substrate; a synchronous loading and unloading assembly set on the frame, used to load the printing substrate from the feeding conveyor belt onto the material tray and unload the printing substrate from the material tray onto the discharging conveyor belt; a stop member set on the synchronous loading and unloading assembly, used to press the printing substrate tightly against the surface of the material tray; and an electric slide set on the frame, which is horizontally arranged. It mainly uses pneumatic suction cups to grip the can or cup, and after gripping, it rotates 90° to place the printing substrate onto the material tray. During unloading, it first grips the substrate and then rotates 90° to place it back onto the conveyor belt. This loading and unloading method involves many steps and is slow, resulting in low production efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a fully automatic hot stamping machine for processing plastic cups. The printing mechanism is equipped with a built-in blowing air pipe. After the printing tray rotates, the blowing air pipe connects to the air pump, which can easily blow the hot-stamped plastic cups off the printing tray, thus completing the automatic unloading.

[0006] The objective of this invention can be achieved through the following technical solution: A fully automatic hot stamping machine for processing plastic cups, comprising a column, a lifting seat, a film receiving and discharging mechanism for orderly receiving and discharging of heat transfer film, a printing mechanism for loading plastic cups, a hot stamping mechanism for pressing the heat transfer film onto the plastic cups, and an automatic feeding mechanism for feeding the printing mechanism. The column is characterized by having a vertical sliding hole; one end of the lifting seat is embedded in the vertical sliding hole and moves up and down along the hole; a lead screw passes through the vertical sliding hole, passes through the lifting seat, and is threadedly connected to it; an adjustment handle is fixed to the upper end of the lead screw after it exits the column; a lifting cylinder is fixed to the lifting seat; and a lifting plate is connected to the lower end of the extension rod of the lifting cylinder. Both the printing mechanism and the film feeding mechanism are fixed on the lifting plate. The printing mechanism includes a printing tray, an adjusting column, a rotating shaft, a blowing air pipe, and a positioning sleeve. A transverse sliding hole is opened in the middle of the column. The adjusting column passes through the transverse sliding hole and slides with the column. The rotating shaft passes through the adjusting column along its length. The front end of the rotating shaft is coaxially fixed with the printing tray. A material changing motor is fixed at the rear end of the adjusting column. The material changing motor is poweredly connected to the rear end of the rotating shaft through a gear set. Several blowing air pipes are evenly arranged circumferentially on the printing tray. A positioning sleeve that can be locked with the plastic cup is fitted outside the blowing air pipe and is rotatably connected to the blowing air pipe. An air pump that can connect with the blowing air pipe to deliver air is also fixed on one side of the adjusting column.

[0007] The automatic feeding mechanism loads plastic cups one by one onto the positioning sleeve of the printing tray. The lifting cylinder drives the hot stamping mechanism to descend, pressing the heat transfer film on the film receiving mechanism onto the surface of the plastic cup. After the transfer is completed, the lifting cylinder drives the hot stamping mechanism to rise. Then, the material changing motor drives the printing tray to rotate, turning the plastic cups to be unloaded to the corresponding station of the air pump. The air pump is connected to the blowing air pipe to blow the plastic cups off, thus achieving automatic unloading.

[0008] Furthermore, a circular groove is opened on the back of the printing tray, the air inlet of the blowing air pipe is located in the circular groove, and an air supply pipe is slidably sleeved on the air outlet pipe of the air pump. The front end of the air supply pipe abuts against the circular groove, and the rear end of the air supply pipe has a horizontally unfolded baffle. A spring is sleeved on the air outlet pipe, one end of the spring abuts against the baffle, and the other end of the spring abuts against the air pump. After the printing tray rotates a certain angle, the air supply pipe can connect with the air inlet of the blowing air pipe.

[0009] Due to the spring force, the air supply connector slides along the air outlet pipe towards the annular groove, firmly abutting the bottom of the annular groove. When the printing tray rotates, the annular groove rotates relative to the air supply connector, aligning the material-discharging air pipe with the air supply connector. Under the spring force, the sealing between the air supply connector and the material-discharging air pipe is improved.

[0010] Furthermore, an adjusting cylinder is fixed to the column, and a push-pull plate is fixed to the rear end of the adjusting column. The telescopic rod of the adjusting cylinder is fixed to the push-pull plate. Activating the adjusting cylinder can push the push-pull plate and the adjusting column to move back and forth, facilitating the adjustment of the printing tray and the plastic cup's position. This allows the heat transfer film to be placed on any position on the cup surface, such as the rim, the middle of the cup, or the bottom of the cup, allowing for free adjustment of the transfer position as needed.

[0011] Furthermore, the automatic feeding mechanism includes a feeding platform, a conveyor belt, a storage bin, a receiving bin, and a feeding cylinder. The conveyor belt is embedded in the feeding platform and is lower than its upper surface. The storage bin is fixed to the upper end of the feeding platform and located above the conveyor belt. The receiving bin is located inside the feeding platform. A chute for guiding plastic cups into the receiving bin is located at the rear end of the feeding platform. The storage bin has an opening at the bottom and a discharge port on its lower side. A baffle plate is fixed on the feeding platform, directly opposite the discharge port. The feeding cylinder is fixed to the outer end of the baffle plate. Driven by the conveyor belt, the plastic cup rests against the baffle plate. Activating the feeding cylinder pushes the plastic cup onto the positioning sleeve.

[0012] Furthermore, the storage bin is equipped with multiple staggered inclined baffles, and a guide plate is fixed inside the loading platform. The guide plate is directly opposite the loading cylinder, which pushes the plastic cups along the guide plate onto the positioning sleeve. The plastic cups can slide one by one along the inclined baffles to the bottom of the storage bin, and finally fall onto the conveyor belt, where they are carried out from the discharge port until they abut against the baffle plate. The guide plate makes it easier and more accurate for the plastic cups to be fitted onto the positioning sleeve.

[0013] Furthermore, a receiving rail is fixed to the loading platform. The receiving rail has an opening on one side facing the air pump, and a guide plate is fixed to the side of the loading platform in front of the opening. After hot stamping is completed, the printing tray rotates the plastic cup to the receiving rail. The air pump delivers gas, which is sent into the plastic cup through the blowing air pipe. As the mouth of the plastic cup is locked with the positioning sleeve, the air pressure inside the plastic cup gradually increases until it pops out, separating it from the positioning sleeve. Supported by the guide plate, it falls into the receiving rail and is conveyed forward by the conveyor belt. Finally, the plastic cup falls from the hopper into the receiving box.

[0014] Furthermore, the film taking and releasing mechanism includes a crossbeam, a taking-up roller, a releasing roller, a taking-up motor, and a releasing motor. The crossbeam is fixed to one side of the lifting plate, the releasing roller is rotatably connected to one end of the crossbeam, and the taking-up roller is rotatably connected to the other end of the crossbeam. Both the taking-up motor and the releasing motor are fixed on the crossbeam. The taking-up motor drives the taking-up roller to rotate, and the releasing motor drives the releasing roller to rotate.

[0015] Furthermore, the hot stamping mechanism includes a hot stamping mounting plate, a heat insulation cover, a heating roller, a roller motor, and an electric heating tube. The hot stamping mounting plate is fixed to the lower end of the lifting plate, the heat insulation cover is fixed to the lower end of the hot stamping mounting plate, the heating roller is rotatably connected to the hot stamping mounting plate and located inside the heat insulation cover, the electric heating tube is fixed to the inner wall of the heat insulation cover, and the roller motor is fixed to one side of the hot stamping mounting plate and drives the heating roller to rotate through a pulley assembly.

[0016] The heat transfer film roll is placed on the unwinding roller, with the other end wound up by the take-up roller. The middle section is positioned between the heating roller and the positioning sleeve. The plastic cup is tightly fitted onto the positioning sleeve. The electric heating element is activated, raising the temperature of the heating roller. The lifting cylinder is then activated, driving the lifting plate downwards, causing the heating roller to press the heat transfer film onto the surface of the plastic cup. Simultaneously, the roller motor, take-up motor, and unwinding motor are activated. The heating roller transfers the pattern from the heat transfer film onto the cup surface, while simultaneously rotating the plastic cup and positioning sleeve around the air blower. After the transfer is complete, the lifting cylinder raises the lifting plate, and the roller motor, take-up motor, and unwinding motor are turned off. The plastic cup is now fully transferred. The material changing motor is activated, rotating the shaft and printing tray by a certain angle, so that the next plastic cup to be hot-stamped is positioned directly below the heating roller. The lifting cylinder, roller motor, take-up motor, and unwinding motor are then activated again, repeating the transfer process.

[0017] Furthermore, a sleeve is fixed on the lifting base, and a guide post is fixed on the lifting plate that slides in conjunction with the sleeve. The sleeve and guide post working together allow for smoother and more controllable up-and-down movement of the lifting plate, enabling precise control of the pressure exerted by the heating roller on the plastic cup.

[0018] Furthermore, the positioning sleeve is shaped like a frustum, with its outer diameter gradually increasing from front to back. The tail of the positioning sleeve has an expanded sealing flange, and the outer surface of the front end of the blowing air pipe has external threads. A retaining ring is threaded onto the front end of the blowing air pipe, and the retaining ring abuts against the front end of the positioning sleeve. When the plastic cup is inserted into the positioning sleeve, the cup opening abuts against the sealing flange, and the outer peripheral wall of the positioning sleeve supports the cup opening, improving the sealing effect and preventing air leakage from inside the plastic cup. During material feeding, air is injected into the blowing air pipe, allowing the internal air pressure to increase more quickly, resulting in a faster and more powerful ejection from the positioning sleeve. The retaining ring is used to block the positioning sleeve, preventing it from moving axially and detaching from the blowing air pipe.

[0019] Compared with existing technologies, this fully automatic hot stamping machine for processing plastic cups has the following advantages:

[0020] 1. It has an adjustable square column that can slide back and forth along the horizontal sliding hole of the column. The adjusting cylinder drives the adjusting square column to move, which makes it easy to adjust the front and back positions of the printing tray and plastic cup, so that the heat transfer film can fall on any position on the cup surface, such as the cup mouth, the middle of the cup body or the lower end of the cup body. The position of the heat transfer film on the cup surface can be freely adjusted according to the needs.

[0021] 2. It has an automatic feeding mechanism that can quickly and accurately push the plastic cups from the storage box onto the printing tray one by one using the feeding cylinder.

[0022] 3. An air pump is fixed on the adjusting column. When the plastic cup that has been hot stamped is rotated to the unloading station along with the printing tray, the air supply pipe of the air pump is connected to the blowing air pipe, which blows the plastic cup off the positioning sleeve, realizing automatic unloading.

[0023] 4. Whether loading or unloading materials, the operation is simple, efficient, and effective. Attached Figure Description

[0024] Figure 1 This is a front structural diagram of the fully automatic hot stamping machine for processing plastic cups.

[0025] Figure 2 This is a schematic diagram of the back structure of this fully automatic hot stamping machine for processing plastic cups. Figure 1 .

[0026] Figure 3 This is a schematic diagram of the back structure of this fully automatic hot stamping machine for processing plastic cups. Figure 2 .

[0027] Figure 4 This is a cross-sectional view of the fully automatic hot stamping machine for processing plastic cups.

[0028] Figure 5 This is a schematic diagram of the printing tray and the air pump.

[0029] Figure 6 This is a cross-sectional view of the printing tray and the air pump.

[0030] Figure 7 This is a schematic diagram of the automatic feeding mechanism.

[0031] Figure 8 This is a cross-sectional structural diagram of the automatic feeding mechanism.

[0032] In the diagram, 1. Column; 11. Vertical sliding hole; 12. Lead screw; 13. Adjusting handle; 14. Horizontal sliding hole; 15. Adjusting cylinder; 16. Push-pull plate; 2. Film take-up and unload mechanism; 21. Crossbeam; 22. Take-up roller; 23. Unload roller; 24. Take-up motor; 25. Unload motor; 3. Printing mechanism; 31. Printing tray; 311. Circular groove; 32. Adjusting square column; 33. Rotating shaft; 34. Air blowing pipe; 35. Positioning rubber sleeve; 351. Sealing flange; 352. Retaining ring; 36. Material changing motor; 37. Gear set; 38. Air pump; 39. Air supply. 391. Connector; 392. Spring; 4. Hot stamping mechanism; 41. Hot stamping mounting plate; 42. Insulation cover; 43. Heating roller; 44. Roller motor; 45. Electric heating tube; 5. Automatic feeding mechanism; 51. Feeding platform; 52. Conveyor belt; 53. Storage bin; 54. Receiving bin; 55. Feeding cylinder; 56. Slide bucket; 57. Baffle plate; 58. Inclined partition; 59. Guide plate; 510. Receiving fence; 511. Receiving plate; 6. Lifting seat; 61. Lifting cylinder; 62. Lifting plate; 63. Sleeve; 64. Guide column; 7. Plastic cup. Detailed Implementation

[0033] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0034] like Figure 1-3As shown, this fully automatic hot stamping machine for processing plastic cups includes a column 1, a lifting base 6, a film receiving and dispensing mechanism 2 for orderly receiving and dispensing heat transfer film, a printing mechanism 3 for loading plastic cups 7, a hot stamping mechanism 4 for pressing the heat transfer film onto the plastic cups 7, and an automatic feeding mechanism 5 for dispensing material to the printing mechanism 3. A vertical sliding hole 11 is provided on the column 1. One end of the lifting seat 6 is inserted into the vertical sliding hole 11 and moves up and down along the vertical sliding hole 11. A lead screw 12 is inserted into the vertical sliding hole 11. The lead screw 12 passes through the lifting seat 6 and is threadedly connected to the lifting seat 6. An adjusting handle 13 is fixed after the upper end of the lead screw 12 passes out of the column 1. A lifting cylinder 61 is fixed on the lifting seat 6. The lower end of the telescopic rod of the lifting cylinder 61 is connected to a lifting plate 62. The hot stamping mechanism 4 and the film feeding mechanism 2 are both fixed on the lifting plate 62. The printing mechanism 3 includes a printing tray 31, an adjusting square column 32, a rotating shaft 33, a blowing air pipe 34, and a positioning rubber sleeve 35. A horizontal opening is provided in the middle of the column 1. The adjusting column 32 is inserted through the horizontal sliding hole 14 and slides with the column 1. The rotating shaft 33 passes through the adjusting column 32 along its length. The front end of the rotating shaft 33 is fixed coaxially with the printing tray 31. The rear end of the adjusting column 32 is fixed with a material changing motor 36. The material changing motor 36 is poweredly connected to the rear end of the rotating shaft 33 through a gear set 37. Eight blowing air pipes 34 are evenly inserted around the printing tray 31. The positioning sleeve 35, which can be locked with the plastic cup 7, is fitted outside the blowing air pipe 34 and is rotatably connected to the blowing air pipe 34. An air pump 38, which can be connected to the blowing air pipe 34 to deliver air, is also fixed on one side of the adjusting column 32.

[0035] Rotating the adjusting handle 13 drives the lead screw 12 to rotate, which can adjust the height of the lifting seat 6. The rotating shaft 33 rotates circumferentially relative to the adjusting column 32 and is fixed axially relative to the adjusting column 32. The automatic feeding mechanism 5 loads plastic cups 7 one by one onto the positioning sleeve 35 of the printing tray 31. The lifting cylinder 61 drives the hot stamping mechanism 4 to descend, pressing the heat transfer film on the film receiving mechanism 2 onto the cup surface of the plastic cup 7. After the transfer is completed, the lifting cylinder 61 drives the hot stamping mechanism 4 to rise. Then, the material changing motor 36 drives the printing tray 31 to rotate, turning the plastic cups 7 to be unloaded to the corresponding station of the air pump 38. The air pump 38 is connected to the blowing air pipe 34 to blow the plastic cups 7 off, realizing automatic unloading.

[0036] An adjusting cylinder 15 is fixed on the column 1, and a push-pull plate 16 is fixed to the rear end of the adjusting square column 32. The telescopic rod of the adjusting cylinder 15 is fixed to the push-pull plate 16. Activating the adjusting cylinder 15 can push the push-pull plate 16 and the adjusting square column 32 to move back and forth, facilitating the adjustment of the front and rear positions of the printing tray 31 and the plastic cup 7. This allows the heat transfer film to fall onto any position on the cup surface, such as the rim, the middle of the cup, or the bottom of the cup, allowing for free adjustment of the transfer position as needed.

[0037] The film taking and releasing mechanism 2 includes a crossbeam 21, a taking-up roller 22, a releasing roller 23, a taking-up motor 24, and a releasing motor 25. The crossbeam 21 is fixed to one side of the lifting plate 62. The releasing roller 23 is rotatably connected to one end of the crossbeam 21, and the taking-up roller 22 is rotatably connected to the other end of the crossbeam 21. The taking-up motor 24 and the releasing motor 25 are both fixed on the crossbeam 21. The taking-up motor 24 drives the taking-up roller 22 to rotate, and the releasing motor 25 drives the releasing roller 23 to rotate.

[0038] The hot stamping mechanism 4 includes a hot stamping mounting plate 41, a heat insulation cover 42, a heating roller 43, a roller motor 44, and an electric heating tube 45. The hot stamping mounting plate 41 is fixed to the lower end of the lifting plate 62, the heat insulation cover 42 is fixed to the lower end of the hot stamping mounting plate 41, the heating roller 43 is rotatably connected to the hot stamping mounting plate 41 and located inside the heat insulation cover 42, the electric heating tube 45 is fixed to the inner wall of the heat insulation cover 42, and the roller motor 44 is fixed to one side of the hot stamping mounting plate 41 and drives the heating roller 43 to rotate through a pulley assembly.

[0039] The heat transfer film roll is mounted on the unloading roller 23, with the other end wound up by the take-up roller 22. The middle section is located between the heating roller 43 and the positioning sleeve 35. The plastic cup 7 is tightly fitted onto the positioning sleeve 35. The electric heating tube 45 is activated, raising the temperature of the heating roller 43. The lifting cylinder 61 is activated, driving the lifting plate 62 to descend, causing the heating roller 43 to press the heat transfer film onto the surface of the plastic cup 7. Simultaneously, the roller motor 44, the take-up motor 24, and the unloading motor 25 are activated. The heating roller 43 transfers the pattern from the heat transfer film onto the cup surface, simultaneously causing the plastic cup 7 and the positioning sleeve 35 to rotate around the blowing pipe 34. After the transfer is complete, the lifting cylinder 61 raises the lifting plate 62, while simultaneously shutting off the roller motor 44, the take-up motor 24, and the unloading motor 25. At this point, the plastic cup 7 has completed the transfer printing. The material changing motor 36 is started, which drives the rotating shaft 33 and the printing tray 31 to rotate at a certain angle, so that the next plastic cup 7 to be hot-stamped is rotated to the position directly below the heating roller 43. The lifting cylinder 61, the roller motor 44, the film take-up motor 24, and the film release motor 25 are started to repeat the transfer printing action.

[0040] A sleeve 63 is fixed on the lifting base 6, and a guide post 64 that slides with the sleeve 63 is fixed on the lifting plate 62. The sleeve 63 and the guide post 64 are designed to work together to make the up-and-down movement of the lifting plate 62 more stable and controllable, and to precisely control the pressure of the heating roller 43 on the plastic cup 7.

[0041] like Figure 4-5As shown, the printing tray 31 has a circular groove 311 on its back. The air inlet of the blowing air pipe 34 is located in the circular groove 311. An air supply pipe 39 is slidably sleeved on the air outlet pipe of the air pump 38. The front end of the air supply pipe 39 abuts against the circular groove 311, and the rear end of the air supply pipe 39 has a horizontally extended baffle 391. A spring 392 is sleeved on the air outlet pipe. One end of the spring 392 abuts against the baffle 391, and the other end of the spring 392 abuts against the air pump 38. After the printing tray 31 rotates a certain angle, the air supply pipe 39 can connect with the air inlet of the blowing air pipe 34.

[0042] Due to the elastic force of the spring 392, the air supply pipe 39 slides along the air outlet pipe toward the annular groove 311, making the air supply pipe 39 firmly abut against the bottom of the annular groove 311. When the printing tray 31 rotates, the annular groove 311 rotates relative to the air supply pipe 39, aligning the material-discharging air pipe 34 with the air supply pipe 39. Under the thrust of the spring 392, the sealing between the air supply pipe 39 and the material-discharging air pipe 34 is improved.

[0043] like Figure 7-8 As shown, the automatic feeding mechanism 5 includes a feeding platform 51, a conveyor belt 52, a storage bin 53, a receiving bin 54, and a feeding cylinder 55. The conveyor belt 52 is embedded in the feeding platform 51 and is lower than the upper surface of the feeding platform 51. The storage bin 53 is fixed to the upper end of the feeding platform 51 and located above the conveyor belt 52. The receiving bin 54 is located inside the feeding platform 51. The tail end of the feeding platform 51 is provided with a chute 56 for guiding the plastic cup 7 into the receiving bin 54. The storage bin 53 has an opening at the bottom and a discharge port on the lower side. A baffle plate 57 is fixed on the feeding platform 51, directly opposite the discharge port. The feeding cylinder 55 is fixed to the outer end of the baffle plate 57. The plastic cup 7 is pushed against the baffle plate 57 by the conveyor belt 52. The feeding cylinder 55 is activated to push the plastic cup 7 onto the positioning sleeve 35.

[0044] The storage bin 53 is equipped with multiple staggered inclined baffles 58. A guide plate 59 is fixed inside the loading platform 51. The guide plate 59 is directly opposite the loading cylinder 55. The loading cylinder 55 pushes the plastic cup 7 along the guide plate 59 onto the positioning sleeve 35. The plastic cup 7 can slide one by one along the inclined baffles 58 to the bottom of the storage bin 53, and finally fall onto the conveyor belt 52. It is carried out from the discharge port by the conveyor belt 52 until it abuts against the baffle plate 57. The guide plate 59 makes it easier and more accurate for the plastic cup 7 to be placed on the positioning sleeve 35.

[0045] The loading platform 51 is also fixed with a receiving rail 510. The receiving rail 510 has an opening on one side facing the air pump 38. A receiving plate 511 is fixed on the side of the loading platform 51 in front of the opening. After hot stamping is completed, the printing tray 31 rotates the plastic cup 7 to the receiving rail 510. The air pump 38 delivers gas, which is sent into the plastic cup 7 through the blowing air pipe 34. As the opening of the plastic cup 7 is locked with the positioning sleeve 35, the air pressure inside the plastic cup 7 gradually increases until it pops out of the plastic cup 7, separating it from the positioning sleeve 35. Supported by the receiving plate 511, it falls into the receiving rail 510 and is conveyed forward by the conveyor belt 52. Finally, the plastic cup 7 falls from the hopper 56 into the receiving box 54.

[0046] The positioning sleeve 35 is a frustum-shaped cone with its outer diameter gradually increasing from front to back. The tail of the positioning sleeve 35 has an extended sealing flange 351. The outer surface of the front end of the blowing air pipe 34 has external threads, and a retaining ring 352 is threaded onto the front end of the blowing air pipe 34, abutting against the front end of the positioning sleeve 35. The plastic cup 7 is inserted into the positioning sleeve 35, with its mouth abutting against the sealing flange 351. Simultaneously, the outer peripheral wall of the positioning sleeve 35 supports the cup mouth, improving the sealing effect and preventing air leakage from the inside of the plastic cup 7. During material feeding, air is injected into the blowing air pipe 34, allowing the internal air pressure to increase more quickly, resulting in a faster and more powerful ejection from the positioning sleeve 35. The retaining ring 352 is used to block the positioning sleeve 35, preventing it from moving axially and detaching from the blowing air pipe 34.

[0047] Workflow: The worker places the plastic cup 7 into the storage bin 53. The plastic cup 7 rolls along the inclined partition 58 onto the bottom conveyor belt 52. The conveyor belt 52 moves the plastic cup 7 out of the storage bin 53 until the plastic cup 7 abuts against the baffle plate 57. At this time, the side loading cylinder 55 is driven to push the plastic cup 7 towards the printing tray 31. The plastic cup 7 is then inserted into the positioning sleeve 35 along the guide plate 59, completing the loading action. The lifting cylinder 61 drives the lifting plate 62 to sink, causing the heating roller 43 to press the heat transfer film onto the plastic cup 7. At the same time, the roller motor 44, the film take-up motor 24, and the film release motor 25 are started. The heating roller 43 transfers the pattern on the heat transfer film onto the cup surface, while simultaneously driving the plastic cup 7 and the positioning sleeve 35 to rotate around the blowing air pipe 34, so that the plastic cup 7 is hot stamped while rotating. After hot stamping is completed, the material changing motor 36 drives the printing tray 31 to rotate, causing the next plastic cup 7 to rotate to the transfer station. The hot-stamped plastic cup 7 continues to rotate with the printing tray 31 until it reaches the unloading station. The air supply pipe 39 connects to the discharge air pipe, and the air pump 38, aligned with the unloading station, starts. Air is blown into the sealed plastic cup 7 through the air supply pipe 39 and the blowing air pipe 34, causing the plastic cup 7 to pop out from the positioning sleeve 35 and fall onto the conveyor belt 52, completing the automatic unloading action. The receiving fence 510 prevents the plastic cup 7 from falling outside. The plastic cup 7 is sent into the hopper 56 by the conveyor belt 52 and falls into the receiving box 54.

[0048] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A fully automatic hot stamping machine for processing plastic cups, comprising a column (1), a lifting seat (6), a film receiving and dispensing mechanism (2) for orderly receiving and dispensing heat transfer film, a printing mechanism (3) for loading plastic cups (7), a hot stamping mechanism (4) for pressing the heat transfer film onto the plastic cups (7), and an automatic feeding mechanism (5) for dispensing material to the printing mechanism (3), characterized in that, A vertical sliding hole (11) is opened on the column (1). One end of the lifting seat (6) is inserted into the vertical sliding hole (11) and moves up and down along the vertical sliding hole (11). A screw rod (12) is inserted into the vertical sliding hole (11). The screw rod (12) passes through the lifting seat (6) and is threadedly connected to the lifting seat (6). The upper end of the screw rod (12) passes out of the column (1) and is fixed with an adjusting handle (13). A lifting cylinder (61) is fixed on the lifting seat (6). The lower end of the telescopic rod of the lifting cylinder (61) is connected to a lifting plate (62). The hot stamping mechanism (4) and the film feeding mechanism (2) are also included. All components are fixed on the lifting plate (62). The printing mechanism (3) includes a printing tray (31), an adjusting column (32), a rotating shaft (33), a blowing air pipe (34), and a positioning sleeve (35). A transverse sliding hole (14) is opened in the middle of the column (1). The adjusting column (32) is inserted into the transverse sliding hole (14) and slides with the column (1). The rotating shaft (33) passes through the adjusting column (32) along the length direction of the adjusting column (32). The front end of the rotating shaft (33) is coaxially fixed with the printing tray (31). A material changing device is fixed at the rear end of the adjusting column (32). The motor (36), the material changing motor (36), and the rear end of the rotating shaft (33) are connected by a gear set (37). Several blowing air pipes (34) are evenly arranged around the printing plate (31). The positioning rubber sleeve (35) that can be locked with the plastic cup (7) is fitted outside the blowing air pipe (34) and is rotatably connected to the blowing air pipe (34). An air pump (38) that can connect with the blowing air pipe (34) to deliver air is also fixed on one side of the adjusting column (32). A circular groove (311) is opened on the back of the printing plate (31). The inlet of the blowing air pipe (34) is... The air inlet is located in the annular groove (311). An air supply pipe (39) is slidably sleeved on the air outlet pipe of the air pump (38). The front end of the air supply pipe (39) abuts against the annular groove (311). The rear end of the air supply pipe (39) has a horizontally unfolded baffle (391). A spring (392) is sleeved on the air outlet pipe. One end of the spring (392) abuts against the baffle (391), and the other end of the spring (392) abuts against the air pump (38). After the printing tray (31) rotates a certain angle, the air supply pipe (39) can connect with the air inlet of the blowing air pipe (34).

2. The fully automatic hot stamping machine for processing plastic cups according to claim 1, characterized in that, An adjusting cylinder (15) is fixed on the column (1), and a push-pull plate (16) is fixed at the rear end of the adjusting column (32). The telescopic rod of the adjusting cylinder (15) is fixed to the push-pull plate (16).

3. The fully automatic hot stamping machine for processing plastic cups according to claim 1, characterized in that, The automatic feeding mechanism (5) includes a feeding platform (51), a conveyor belt (52), a storage box (53), a receiving box (54), and a feeding cylinder (55). The conveyor belt (52) is embedded in the feeding platform (51) and is lower than the upper surface of the feeding platform (51). The storage box (53) is fixed on the upper end of the feeding platform (51) and located above the conveyor belt (52). The receiving box (54) is set inside the feeding platform (51). The tail end of the feeding platform (51) is provided with a chute (56) for guiding the plastic cup (7) into the receiving box (54). The storage box (53) has an opening at the bottom and a discharge port on the lower side. A baffle plate (57) is fixed on the feeding platform (51) and faces the discharge port. The feeding cylinder (55) is fixed on the outer end of the baffle plate (57).

4. The fully automatic hot stamping machine for processing plastic cups according to claim 3, characterized in that, The storage box (53) is equipped with multiple staggered inclined partitions (58). The inner side of the loading platform (51) is fixed with a guide plate (59). The guide plate (59) is directly opposite the loading cylinder (55). The loading cylinder (55) pushes the plastic cup (7) to slide along the guide plate (59) onto the positioning sleeve (35).

5. The fully automatic hot stamping machine for processing plastic cups according to claim 4, characterized in that, The loading platform (51) is also fixed with a receiving fence (510). The receiving fence (510) has an opening on one side and the opening faces the air pump (38). The loading platform (51) has a receiving plate (511) located in front of the opening on the side.

6. The fully automatic hot stamping machine for processing plastic cups according to claim 1, characterized in that, The film taking and releasing mechanism (2) includes a crossbeam (21), a taking roller (22), a releasing roller (23), a taking motor (24), and a releasing motor (25). The crossbeam (21) is fixed on one side of the lifting plate (62). The releasing roller (23) is rotatably connected to one end of the crossbeam (21), and the taking roller (22) is rotatably connected to the other end of the crossbeam (21). The taking motor (24) and the releasing motor (25) are both fixed on the crossbeam (21). The taking motor (24) drives the taking roller (22) to rotate, and the releasing motor (25) drives the releasing roller (23) to rotate.

7. The fully automatic hot stamping machine for processing plastic cups according to claim 1, characterized in that, The hot stamping mechanism (4) includes a hot stamping mounting plate (41), a heat insulation cover (42), a heating roller (43), a roller motor (44), and an electric heating tube (45). The hot stamping mounting plate (41) is fixed to the lower end of the lifting plate (62), the heat insulation cover (42) is fixed to the lower end of the hot stamping mounting plate (41), the heating roller (43) is rotatably connected to the hot stamping mounting plate (41) and located inside the heat insulation cover (42), the electric heating tube (45) is fixed to the inner wall of the heat insulation cover (42), and the roller motor (44) is fixed to one side of the hot stamping mounting plate (41) and drives the heating roller (43) to rotate through a pulley assembly.

8. The fully automatic hot stamping machine for processing plastic cups according to claim 1, characterized in that, A sleeve (63) is fixed on the lifting seat (6), and a guide post (64) that slides with the sleeve (63) is fixed on the lifting plate (62).

9. The fully automatic hot stamping machine for processing plastic cups according to claim 1, characterized in that, The positioning sleeve (35) is in the shape of a frustum with an outer diameter that gradually increases from front to back. The tail of the positioning sleeve (35) has an unfolded sealing flange (351). The outer surface of the front end of the blowing air pipe (34) has an external thread. A retaining ring (352) is threaded on the front end of the blowing air pipe (34). The retaining ring (352) is close to the front end of the positioning sleeve (35).

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