Plastic bucket transfer printing equipment

Abstract

The invention relates to the technical field related to transfer printing, in particular to plastic barrel transfer printing equipment which comprises a transfer printing table and a vertical frame installed on the transfer printing table. The supporting roller is used for supporting the transfer printing of the plastic barrel and is hollow, and a plurality of air supply holes communicated with the interior are formed in the surface of the supporting roller; the driven air pumping mechanism is mounted on the vertical frame and connected with the supporting roller; the grabbing mechanism comprises a feeding assembly and a discharging assembly, the feeding assembly is used for sleeving the supporting rollers with the plastic barrels, the discharging assembly is used for taking down the plastic barrels from the supporting rollers, and the feeding assembly and the discharging assembly are driven by two translation overturning pieces to move correspondingly; and the guide assembly is arranged on a mounting plate fixed to the transfer printing table, the first suction cup and the second suction cup are controlled to move in a staggered mode in the horizontal direction through the guide assembly, and under the cooperation of the rotary traction mechanism and the passive air pumping mechanism, it is ensured that the plastic bucket can be smoothly separated from the supporting roller after transfer printing through the dual effects of air blowing and rotary pulling.

Description

Technical Field

[0001] This invention relates to the field of transfer printing technology, specifically a plastic bucket transfer printing device. Background Technology

[0002] Heat transfer printing on plastic buckets is a process that permanently attaches patterns or text to the surface of plastic buckets using heat transfer technology. In the case of rotary heat transfer printing, the plastic bucket is placed on a support roller, and the film with the printed pattern is controlled to adhere to the surface of the plastic bucket by a hot pressure roller. Then, the support roller drives the plastic bucket to rotate, and the hot pressure roller provides a certain pressure and heat to transfer the pattern onto the plastic bucket.

[0003] During the transfer printing process, mechanically controlled suction cups are typically used to adhere to the plastic bucket for loading and unloading. This mechanical operation allows for effective positioning, ensuring the bucket fits snugly onto the support rollers without deviation. After the transfer is complete, the suction cups are used again to adhere the bucket, which is then removed by pulling. However, because the transfer process requires applying pressure and heat to the film using hot rollers to successfully transfer the pattern to the plastic bucket's surface, the outer wall of the bucket may undergo some indentation and deformation under the combined effects of pressure and heat. This causes the bucket wall to adhere tightly to the support rollers, creating localized negative pressure adhesion. Furthermore, the static friction between the bucket and the support rollers increases. Forcibly pulling the bucket could lead to breakage. Summary of the Invention

[0004] The purpose of this invention is to provide a plastic bucket transfer printing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A plastic bucket transfer printing device includes a transfer table and a vertical frame installed on the transfer table; Also includes: The support roller used for transfer printing on plastic buckets is hollow and has multiple air holes on its surface that communicate with the interior. A passive air pumping mechanism is installed on the vertical frame and connected to the support roller. It is used to drive the support roller to rotate, and when the support roller moves toward the passive air pumping mechanism, the passive air pumping mechanism pumps air into the support roller to form an air pressure layer between the plastic bucket and the support roller. The gripping mechanism includes a feeding assembly for mounting a plastic bucket onto a support roller and a discharging assembly for removing the plastic bucket from the support roller. The feeding assembly and the discharging assembly are driven by two independent translation and flipping components to achieve automatic feeding and discharging of the plastic bucket. A guide component is mounted on a mounting plate fixed to the transfer table. When the translational flipping component moves along the guide component, it can drive the feeding component or the unloading component to rotate the plastic bucket.

[0006] The plastic bucket transfer equipment described above includes the passive air pumping mechanism comprising: A cylinder body, which is fixed on the vertical frame and connected to a one-way air intake pipe, and a limit ring is also fixed on the cylinder body; A piston disc is slidably mounted in the cylinder body, and the piston disc abuts against one side of the limiting ring.

[0007] The plastic bucket transfer equipment described above includes, as well as, the passive air pumping mechanism: A servo motor mounted on the vertical frame and a transmission sleeve fixed to the output shaft of the servo motor, the transmission sleeve passing through the vertical frame and extending into the cylinder body, the transmission sleeve located in the cylinder body being hollow and having a vent hole; A hollow rod is axially slidably installed inside the transmission sleeve, passing through the piston disc and fixedly connected to the support roller. A first spring is sleeved on the transmission sleeve and the hollow rod, and the two ends of the first spring abut against the inner wall of the cylinder and the piston disc, respectively.

[0008] The plastic bucket transfer equipment described above includes a second movable plate and a support sleeve. The support sleeve is fixed on the second movable plate and has a slot. A support rod slides axially inside the support sleeve. A first suction cup is fixed to the end of the support rod away from the second movable plate, and a movable ring that slides in the slot is fixed to the end of the support rod away from the first suction cup.

[0009] The plastic bucket transfer equipment described above: a corrugated groove is formed on the outer circumference of the support rod, a second limiting slider is fixed on the inner wall of the support sleeve, the second limiting slider is slidably engaged with the corrugated groove, a second spring is sleeved on the support sleeve, and the two ends of the second spring abut against the movable ring and the fixed ring fixed at the end of the support sleeve, respectively.

[0010] The plastic bucket transfer equipment described above: two fixed plates are symmetrically mounted on the mounting plate, and two translational and flipping components are installed between the two oppositely arranged fixed plates, wherein: The translation and flipping component includes a guide post fixed on the fixed plate, a guide sleeve that slides axially on the guide post, and a receiving plate fixed to the side wall of the guide sleeve; It also includes a rotating component and a pushing component disposed on the receiving plate for controlling the second movable plate to perform a yaw action.

[0011] The plastic bucket transfer equipment described above: the rotating assembly includes a rotating rod with a guide groove formed on its outer circumferential wall, and the rotating rod is rotatably mounted on the receiving plate; A sliding sleeve slides axially on the rotating rod, and a first limiting slider is fixed on the inner wall of the sliding sleeve to slide and engage with the guide groove.

[0012] As described above, in the plastic bucket transfer equipment: the guide groove includes a connected horizontal groove and a spiral groove; when the first limiting slider enters the spiral groove along the horizontal groove, the rotating rod tends to rotate.

[0013] The plastic bucket transfer device described above: the pushing assembly includes a follower disk and a movable sleeve that slide along the axial direction of the rotating rod. The movable sleeve is fixedly connected to the follower disk and the second movable plate. An annular groove is formed on the follower disk. A pushing rod that passes through the annular groove is fixed on the movable sleeve. A follower ring that abuts against the follower disk is fixed on the pushing rod.

[0014] The plastic bucket transfer equipment described above: the guiding assembly includes a guiding groove formed on the mounting plate, a sliding groove is provided on the receiving plate, a sliding block is slidably installed in the sliding groove, a limiting post and a connecting rod are fixed to the side wall of the sliding block, the limiting post is slidably engaged with the guiding groove, and the connecting rod is fixedly connected to the sliding sleeve.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention uses a pneumatic and rotary pulling method to ensure that when a plastic bucket becomes difficult to pull out due to increased static friction with the support roller caused by deformation due to hot pressing, it can be reshaped and pulled out smoothly. Specifically, after the plastic bucket is fed by the second suction cup, a transfer action is performed under the action of the hot pressing roller. After the transfer is completed, the gripping mechanism controls the first suction cup to adsorb the plastic bucket, and controls the movement of the passive air pumping mechanism through the plastic bucket and the support roller to pump gas into the plastic bucket through the air delivery hole, so that positive pressure is formed inside and a certain ejection force is provided. This avoids the problem that the plastic bucket wall is deformed due to pressure and heat during hot pressing, which would then create negative pressure and make it difficult to pull out. At the same time, under the action of the rotating traction mechanism, the plastic bucket is controlled to reciprocate at a certain angle to overcome the friction between the support roller and the plastic bucket until the plastic bucket is successfully pulled out. Before being pulled out, gas is pumped into the plastic bucket through the passive air pumping mechanism to form positive pressure inside, which not only plays the role of air blowing and supporting, but also restores the original shape of the concave area of ​​the plastic bucket and reduces the friction with the support roller, and also plays the role of pressurizing and pushing out. Under the action of gas pushing force, the plastic bucket is easier to remove from the support roller. In addition, through the cooperation of the corrugated groove and the second limiting slider, the first suction cup can control the plastic bucket to rotate slightly back and forth, and continuously provide a slowly increasing pulling force during the rotation, converting the large static friction between the plastic bucket and the support roller into a smaller dynamic friction, reducing the pulling resistance, and ensuring that the plastic bucket is pulled out smoothly without being damaged in the process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an embodiment of a plastic bucket transfer printing device.

[0017] Figure 2 This is a structural schematic diagram from another angle in an embodiment of the plastic bucket transfer printing equipment.

[0018] Figure 3 This is a schematic diagram of part of the passive air pumping mechanism in an embodiment of the plastic bucket transfer equipment.

[0019] Figure 4 This is a cross-sectional structural diagram of the support roller and pump cylinder in an embodiment of the plastic bucket transfer equipment.

[0020] Figure 5 This is an exploded structural diagram of part of the passive air pumping mechanism in an embodiment of the plastic bucket transfer equipment.

[0021] Figure 6 This is a schematic diagram showing the connection relationship between the gripping mechanism, part of the rotating and pulling mechanism, and the guiding component in an embodiment of the plastic bucket transfer equipment.

[0022] Figure 7 for Figure 6 Another structural diagram from another angle.

[0023] Figure 8 This is a schematic diagram of the structure of some gripping mechanisms, some rotating and pulling mechanisms, and some guiding components in an embodiment of the plastic bucket transfer equipment.

[0024] Figure 9 This is an exploded structural diagram of some gripping mechanisms and some guiding components in an embodiment of the plastic bucket transfer equipment.

[0025] Figure 10 This is an exploded structural diagram of the rotating traction mechanism in an embodiment of the plastic bucket transfer equipment.

[0026] In the diagram: 1. Transfer table; 2. Vertical frame; 3. Cylinder body; 301. Limiting ring; 4. Servo motor; 5. Transmission sleeve; 501. Vent hole; 6. Hollow rod; 7. Support roller; 701. Air inlet; 8. Piston disc; 9. First spring; 10. Air inlet pipe; 11. Mounting plate; 1101. First straight groove; 1102. Inclined groove; 1103. Second straight groove; 12. Fixing plate; 13. Guide column; 14. Guide sleeve; 15. Receiving plate; 1501. Slide groove; 16. Rotating rod; 1601. Horizontal groove; 1602 17. Spiral groove; 18. Sliding sleeve; 19. First limiting slider; 20. Connecting rod; 21. Sliding block; 22. Limiting post; 23. Follower plate; 24. Annular groove; 25. Push rod; 26. Follower ring; 27. Movable sleeve; 28. First movable plate; 29. ​​Support sleeve; 20. Second limiting slider; 21. Slot; 22. Support rod; 23. Corrugated groove; 24. Movable ring; 25. First suction cup; 26. Second spring; 27. Second suction cup; 28. Second movable plate. Detailed Implementation

[0027] Various exemplary embodiments, features, and aspects of the present invention will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0028] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0029] Furthermore, to better illustrate the present invention, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that the present invention can be practiced even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail, in order to highlight the spirit of the present invention.

[0030] Please see Figures 1-10 In this embodiment of the invention, a plastic bucket transfer printing device includes a transfer table 1 and a vertical frame 2 installed on the transfer table 1; Also includes: The support roller (7) used for plastic bucket transfer support is hollow and has multiple air holes (701) on its surface that communicate with the interior. A passive air pumping mechanism is installed on the vertical frame 2 and connected to the support roller 7. It is used to drive the support roller 7 to rotate, and when the support roller 7 moves toward the passive air pumping mechanism, the passive air pumping mechanism pumps air into the support roller 7 so that an air pressure layer is formed between the plastic bucket and the support roller 7. The gripping mechanism includes a feeding component for mounting the plastic bucket onto the support roller (7) and a discharging component for removing the plastic bucket from the support roller (7). The feeding component and the discharging component are driven by two independent translation and flipping components to realize automatic feeding and discharging of the plastic bucket. The guide component is mounted on the mounting plate 11 fixed to the transfer table 1. When the translation and flipping component moves along the guide component, it can drive the feeding component or the unloading component to drive the plastic bucket to perform a flipping action.

[0031] Specifically, the transfer table 1 is equipped with a hot press roller for providing pressure and heat, and a guide roller for supporting and pulling the film printed with the desired pattern. The hot press roller is driven by a cylinder and can move vertically, while the guide roller is driven by a motor and can pull the film. Under the action of the hot press roller, the film can be controlled to adhere to the surface of the plastic bucket and perform heat transfer. When transferring to a plastic bucket, the feeding assembly can adsorb the plastic bucket, and under the action of the translation and flipping component, the plastic bucket is controlled to move towards the support roller 7. Simultaneously, the translation and flipping component, in conjunction with the guide assembly, flips and centers the plastic bucket during its movement, ensuring that the open side of the plastic bucket faces the support roller 7. When the plastic bucket is fitted onto the support roller 7, the film adheres to the plastic bucket under the action of the hot press roller. At this time, the passive pumping mechanism... The support roller 7 controls the rotation of the plastic bucket. Under the action of the guide roller, the film is pulled to move so that the pattern is transferred onto the surface of the plastic bucket. After the transfer is completed, the translation and flipping component controls the feeding assembly to adsorb the plastic bucket and push the plastic bucket and support roller 7 toward the vertical frame 2. This is to cooperate with the passive air pumping mechanism to pump gas into the plastic bucket through the air supply hole 701. Positive pressure will be formed inside the plastic bucket, and a certain ejection force will be provided. This avoids the problem that the plastic bucket wall will deform due to pressure and heat during hot pressing, which will lead to negative pressure inside the plastic bucket and make it difficult to pull out. At this time, the translation and flipping component controls the plastic bucket to move away from the support roller 7 through the feeding assembly. If the plastic bucket is still difficult to pull out, the feeding assembly controls the plastic bucket to rotate back and forth at a certain angle to overcome the friction between the support roller 7 and the plastic bucket until the plastic bucket is successfully pulled out.

[0032] Please see Figures 1-5 The passive air pumping mechanism includes a cylinder 3 fixed on the vertical frame 2 and connected to a one-way air intake pipe 10, and a limiting ring 301 fixed on the cylinder 3. It also includes a piston disc 8 that is sealed and slidably installed in the cylinder body 3, the piston disc 8 abutting against one side of the limiting ring 301; The servo motor 4 and the transmission sleeve 5 fixed to the output shaft of the servo motor 4 are mounted on the vertical frame 2. The transmission sleeve 5 passes through the vertical frame 2 and extends into the cylinder 3. The transmission sleeve 5 located in the cylinder 3 is hollow and has a vent hole 501. A hollow rod 6 is axially slidably installed inside the transmission sleeve 5, passing through the piston disc 8 and fixedly connected to the support roller 7. A first spring 9 is sleeved on the transmission sleeve 5 and the hollow rod 6. The two ends of the first spring 9 abut against the inner wall of the cylinder 3 and the piston disc 8, respectively.

[0033] In detail, the transmission sleeve 5 is hollow and has a keyway inside. A key that mates with the keyway is fixed to the outer wall of the hollow rod 6. With the cooperation of the keyway and the key, the hollow rod 6 can rotate with the transmission sleeve 5 and slide along the axial direction of the transmission sleeve 5. In the initial state, the piston disc 8 and the limiting ring 301 are in contact, so the distance between the piston disc 8 and the bottom inner wall of the cylinder 3 is the maximum. The elongation of the first spring 9 in its natural state is greater than this distance. Therefore, the first spring 9 is in a pre-compressed state and always provides the piston disc 8 with a thrust in the direction away from the transmission sleeve 5. One-way valves are provided in both the hollow rod 6 and the intake pipe 10. Under the action of the one-way valves, the gas can only enter the cylinder 3 through the intake pipe 10 and be discharged through the hollow rod 6.

[0034] When it is necessary to transfer the image onto the plastic bucket, the plastic bucket can be placed on the support roller 7. There is a certain friction between the support roller 7 and the plastic bucket. Therefore, when the servo motor 4 is working, it drives the transmission sleeve 5 to rotate. Through the cooperation of the key and keyway, the hollow rod 6 rotates synchronously, which in turn drives the plastic bucket to rotate through the support roller 7. Under the synergistic action of the hot press roller and the guide roller, the pattern on the film can be transferred onto the outer wall of the plastic bucket.

[0035] When the plastic bucket is pulled out, the support roller 7 is moved towards the cylinder 3 by pushing the plastic bucket, thereby driving the hollow rod 6 and the piston disc 8 to move and compressing the first spring 9. Under the action of the piston disc 8, the pressure in the cylinder 3 increases, and the gas is delivered to the hollow rod 6 through the vent 501, and then to the support roller 7 through the hollow rod 6, and discharged through the air outlet 701. Under the action of the gas, a positive pressure is formed inside the plastic bucket, which can achieve the effect of air blowing and supporting, so that the concave area of ​​the plastic bucket returns to its original shape and reduces the friction between it and the support roller 7, and also achieve the effect of pressurizing and ejecting. With the help of the gas thrust, the plastic bucket is easier to remove from the support roller 7.

[0036] The aforementioned feeding assembly includes a first movable plate 24 and a second suction cup 29 fixed on the first movable plate 24, the second suction cup 29 being connected to a negative pressure machine.

[0037] The aforementioned feeding assembly includes a second movable plate 30 and a support sleeve 25 fixed on the second movable plate 30. A groove 2502 is formed on the support sleeve 25. A support rod 26 is axially slidable inside the support sleeve 25. A first suction cup 27 is fixed to the end of the support rod 26 away from the second movable plate 30. A movable ring 2602 that is slidably connected to the groove 2502 is fixed to the end of the support rod 26 away from the first suction cup 27.

[0038] Furthermore, a corrugated groove 2601 is formed on the outer circumference of the support rod 26, and a second limiting slider 2501 that slides and engages with the corrugated groove 2601 is fixed on the inner wall of the support sleeve 25. A second spring 28 is sleeved on the support sleeve 25, and the two ends of the second spring 28 abut against the movable ring 2602 and the fixed ring fixed at the end of the support sleeve 25, respectively.

[0039] After the plastic bucket transfer is completed, the translation and flipping component connected to the second movable plate 30 drives the first suction cup 27 to adhere to and attract the plastic bucket. At the same time, the translation and flipping component continues to drive the first suction cup 27 to move towards the support roller 7. Under the action of the passive air pumping mechanism described above, the gas is controlled to be pumped into the plastic bucket, so that positive pressure is formed inside the plastic bucket, thereby providing a certain pulling force.

[0040] If the friction between the plastic bucket and the support roller 7 decreases after the gas is applied, the first suction cup 27 can smoothly drive the plastic bucket to detach from the support roller 7. If the friction between the plastic bucket and the support roller 7 is still relatively large, it means that the first suction cup 27 cannot directly control the plastic bucket to detach. In this case, when the second movable plate 30 moves away from the support roller 7, it drives the support sleeve 25 to move, causing the second limit slider 2501 to slide along the corrugated groove 2601, so that the support rod 26 rotates. The support rod 26 will control the plastic bucket to reciprocate and rotate at a certain angle through the first suction cup 27. During this process, the size of the support sleeve 25 and the support rod 26 gradually decreases, and under the action of the movable ring 2602, the second spring 28 is compressed, so that the pulling force provided by the first suction cup 27 to the plastic bucket gradually increases until the plastic bucket detaches from the support roller 7, thereby realizing the smooth detachment of the plastic bucket from the support roller 7.

[0041] Preferably, through the cooperation of the corrugated groove 2601 and the second limiting slider 2501, the plastic bucket can be controlled to rotate slightly back and forth by the first suction cup 27, and during rotation, a pulling force is always provided to the plastic bucket. This pulling force is in a state of continuous and slow increase. In this way, the large static friction between the plastic bucket and the support roller 7 can be converted into a small dynamic friction, thereby reducing the resistance to pulling out, ensuring that the plastic bucket can be pulled out smoothly, and that no damage will occur during the pulling out process.

[0042] Two translational and flipping components are installed between two opposing fixed plates 12, which are fixed to the mounting plate 11. The two translational and flipping components are used to drive the feeding assembly and the unloading assembly to move, respectively. They have the same structure. Therefore, this embodiment takes the translational and flipping component connecting the unloading assembly as an example for detailed description, as follows: Please see Figure 1 , Figure 2 , Figures 6-9 The translation and flipping component includes a guide post 13 fixed on the fixed plate 12, a guide sleeve 14 that slides axially on the guide post 13, and a receiving plate 15 fixed to the side wall of the guide sleeve 14. It also includes a rotating component and a pushing component disposed on the receiving plate 15 for controlling the second movable plate 30 to perform a yaw action.

[0043] The rotating assembly includes a rotating rod 16 rotatably mounted on the receiving plate 15. A guide groove is formed on the outer circumferential wall of the rotating rod 16. A sliding sleeve 17 is axially slidable on the rotating rod 16. A first limiting slider 1701 that slides and engages with the guide groove is fixed on the inner wall of the sliding sleeve 17.

[0044] The pushing assembly includes a follower disk 21 and a movable sleeve 23 that slide along the axis of the rotating rod 16. The movable sleeve 23 is fixedly connected to the follower disk 21 and the second movable plate 30. An annular groove 2101 is formed on the follower disk 21. A pushing rod 22 that passes through the annular groove 2101 is fixed on the movable sleeve 23. A follower ring 2201 that abuts against the follower disk 21 is fixed on the pushing rod 22.

[0045] Please see Figure 1 , Figure 2 , Figures 6-9 The guiding assembly includes a guiding groove formed on the mounting plate 11, and a sliding groove 1501 is provided on the receiving plate 15. A sliding block 19 is slidably installed in the sliding groove 1501. A limiting post 20 and a connecting rod 18 are fixed to the side wall of the sliding block 19. The limiting post 20 is slidably engaged with the guiding groove, and the connecting rod 18 is fixedly connected to the sliding sleeve 17.

[0046] Please see Figures 5-7 The guide groove is symmetrically arranged and can be divided into three sections: the first straight groove 1101, the inclined groove 1102, and the second straight groove 1103. The two ends of the inclined groove 1102 are connected to the ends of the first straight groove 1101 and the second straight groove 1103, respectively. The guide groove can be divided into two sections: the horizontal groove 1601 and the spiral groove 1602. Please see Figure 5 , Figure 6The limiting post 20 associated with the first suction cup 27 is defined as the second limiting post, and the limiting post 20 associated with the second suction cup 29 is defined as the first limiting post. Described by the movement trajectory of the second suction cup 29, in the initial state, the second limiting post is located at the end of the stroke of the second straight groove 1103 on the side away from the first straight groove 1101. Under the action of the second limiting post and the second straight groove 1103, the sliding block 19 is located at the end of the stroke of the slide groove 1501 on the side away from the guide sleeve 14. The sliding sleeve 17 is controlled by the connecting rod 18 to be located at the end of the stroke on the side away from the receiving plate 15. Under the action of the sliding sleeve 17, the first limiting slider 170... 1 is located at the end of the stroke of the spiral groove 1602 on the side away from the horizontal groove 1601, and a key is also fixed on the rotating rod 16. The inner wall of the movable sleeve 23 is formed with a keyway that matches the key, so that the movable sleeve 23 can rotate synchronously with the rotating rod 16 and can slide along the axial direction of the rotating rod 16. In this regard, under the action of the push rod 22, through the cooperation of the follower ring 2201 and the annular groove 2101, the movable sleeve 23 is controlled to be located at the end of the stroke towards the receiving plate 15, so that the first movable plate 24 is misaligned with the support roller 7 in the horizontal direction, and the adsorption direction of the second suction cup 29 is opposite to the required placement direction of the plastic bucket. When a plastic bucket needs to be placed, the bottom outer wall of the plastic bucket can be attached to the second suction cup 29 using a transfer device. Under the action of the second suction cup 29, the plastic bucket is adsorbed. At this time, the guide sleeve 14 can be controlled to slide along the axial direction of the guide post 13 by a drive source such as a cylinder or lead screw, thereby driving the receiving plate 15 to move towards the support roller 7, so that the second limiting post slides along the second straight groove 1103. When the second limiting post disengages from the second straight groove 1103 and enters the inclined groove 1102, under the action of the second limiting post and the inclined groove 1102, the plastic bucket is adsorbed. The sliding block 19 slides along the groove 1501 and moves toward the guide sleeve 14. The sliding block 19 also controls the sliding sleeve 17 to slide along the axis of the rotating rod 16 through the connecting rod 18, so that the first limiting slider 1701 slides along the spiral groove 1602. Under the action of the first limiting slider 1701 and the spiral groove 1602, the rotating rod 16 rotates. Thus, through the cooperation of the key and the keyway, the movable sleeve 23 is controlled to rotate synchronously with the rotating rod 16, so as to control the plastic bucket to flip through the first movable plate 24 and the second suction cup 29. When the sliding sleeve 17 moves, it will also drive the push rod 22 to move. With the cooperation of the follower ring 2201 and the follower disk 21, the movable sleeve 23 will gradually move towards the same axis position as the support roller 7, so as to drive the second suction cup 29 to move. When the follower ring 2201 rotates, the annular groove 2101 can prevent the push rod 22 from interfering with the follower disk 21. When the second limit post disengages from the inclined groove 1102 and enters the first straight groove 1101, the second suction cup 29 just moves to the same axis position as the support roller 7, thereby positioning the plastic bucket. The guide sleeve 14 continues to move until the second suction cup 29 controls the plastic bucket to enter the support roller 7 at the end of its stroke. After installation, the guide sleeve 14 can be controlled to reset so that the second suction cup 29 can be reset. The support roller 7 has a tapered end and the cross-section of the end of the support roller 7 away from the vertical frame 2 is the smallest. Therefore, even if the plastic bucket is slightly off-center from the support roller 7 when it is put into the support roller 7, the plastic bucket can be put into the support roller 7 smoothly. In this way, the support roller 7 can not only provide support, but also guide the plastic bucket to be installed smoothly.

[0047] Regarding the movement trajectory of the first suction cup 27, after the second suction cup 29 is reset, the first limiting post is located at the end of the stroke of the second straight groove 1103 on the side away from the first straight groove 1101, so that the distance between the first suction cup 27 and the second suction cup 29 is maximized, ensuring that the two will not interfere with each other. The adsorption direction of the first suction cup 27 is opposite to the placement direction of the plastic bucket, and the size of the mutual fitting between the support rod 26 and the support sleeve 25 is maximized, so that the movable ring 2602 is located at the end of the stroke on the side of the slot 2502, so that the distance between the movable ring 2602 and the fixed ring is maximized. The elongation of the second spring 28 in its natural state is greater than this distance. Therefore, the second spring 28 is in a pre-compressed state and always provides the support rod 26 with a thrust in the direction closer to the inside of the support sleeve 25. In this state, the distance between the first suction cup 27 and the second movable plate 30 is greater than the distance between the second suction cup 29 and the first movable plate 24. At this time, the guide sleeve 14 slides along the axial direction of the guide post 13 and drives the receiving plate 15 to move, so that the first limiting post slides along the second straight groove 1103, which is the same as the trajectory of the second suction cup 29. When the first limiting post is located in the inclined groove 1102, the rotating rod 16 rotates, and the movable sleeve 23 slides along the axial direction of the rotating rod 16, so that the first suction cup 27 is flipped by the second movable plate 30 and moves towards the central axis of the support roller 7. When the first limiting post is located in the first straight groove 1101, the first suction cup 27 is parallel to the support roller 7 and the central axis coincides.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A plastic bucket transfer printing apparatus, comprising a transfer printing table (1) and an upright frame (2) fixed on the transfer printing table (1); characterized in that, Also include: Supporting roller (7) for plastic bucket transfer support, hollow setting, the surface is equipped with a plurality of gas hole (701) which communicates with the inside; Passive pumping mechanism, installed on the vertical frame (2) and connected with supporting roller (7), for driving the supporting roller (7) to rotate, and when the supporting roller (7) moves towards the passive pumping mechanism, the passive pumping mechanism pumps air into the supporting roller (7) to form an air pressure layer between the plastic bucket and the supporting roller (7); grabbing mechanism, including feeding assembly for sleeving plastic bucket on supporting roller (7) and unloading assembly for taking plastic bucket off supporting roller (7), the feeding assembly and unloading assembly are respectively driven by two independent translation turnover pieces to realize automatic feeding and unloading of plastic bucket; guide assembly is arranged on the mounting plate (11) fixed with the transfer table (1), when the translation turnover piece moves along the guide assembly, it can drive the feeding assembly or the unloading assembly to drive the plastic bucket to perform overturning action; the unloading assembly includes a second movable plate (30) and a supporting sleeve (25), the supporting sleeve (25) is fixed on the second movable plate (30), the supporting sleeve (25) is formed with a clamping groove (2502), the supporting sleeve (25) is axially slidably provided with a supporting rod (26), the end of the supporting rod (26) away from the second movable plate (30) is fixed with a first suction cup (27), the end of the supporting rod (26) away from the first suction cup (27) is fixed with a movable ring (2602) slidably connected with the clamping groove (2502); two fixed plates (12) are symmetrically installed on the mounting plate (11), and two translation turnover pieces are installed between the two fixed plates (12) arranged opposite to each other, wherein: the translation turnover piece includes a guide column (13) fixed on the fixed plate (12), the guide column (13) is axially slidably provided with a guide sleeve (14), and the side wall of the guide sleeve (14) is fixed with a receiving plate (15); further comprising a rotating assembly and a pushing assembly arranged on the receiving plate (15) for controlling the second movable plate (30) to perform a deflection action.

2. The plastic pail transfer apparatus of claim 1, wherein, The passive pumping mechanism comprises: Cylinder body (3), the cylinder body (3) is fixed on the vertical frame (2) and connected with one-way conduction air inlet pipe (10), the cylinder body (3) is further fixed with limiting ring (301); Piston disc (8), sealingly and slidably installed in the cylinder body (3), the piston disc (8) abuts one side of the limiting ring (301).

3. The plastic pail transfer apparatus of claim 2, wherein, The passive pumping mechanism further comprises: Servo motor (4) installed on the vertical frame (2) and transmission sleeve rod (5) fixed with the output shaft of the servo motor (4), the transmission sleeve rod (5) penetrates the vertical frame (2) and extends into the cylinder body (3), the transmission sleeve rod (5) in the cylinder body (3) is hollowly arranged and forms an air hole (501); The hollow rod (6) penetrating the piston disc (8) and fixedly connected with the supporting roller (7) is axially slidably installed in the transmission sleeve rod (5), and the first spring (9) is sleeved on the transmission sleeve rod (5) and the hollow rod (6), and the two ends of the first spring (9) respectively abut against the inner wall of the cylinder body (3) and the piston disc (8).

4. The plastic pail transfer apparatus of claim 1, wherein, The support sleeve (25) is fixedly provided with the second limiting sliding block (2501) on the inner wall, the second limiting sliding block (2501) is slidably embedded in the corrugated groove (2601), the second spring (28) is sleeved on the support sleeve (25), and the two ends of the second spring (28) respectively abut against the movable ring (2602) and the fixed ring fixed on the end of the support sleeve (25).

5. The plastic pail transfer apparatus of claim 4, wherein, The rotating assembly comprises a rotating rod (16) with a guide groove formed on the circumferential outer wall, and the rotating rod (16) is rotatably installed on the receiving plate (15); The sliding sleeve (17) is axially slidably installed on the rotating rod (16), and the first limiting sliding block (1701) is fixedly arranged on the inner wall of the sliding sleeve (17) and slidably embedded in the guide groove.

6. The plastic pail transfer apparatus of claim 5, wherein, The guide groove comprises a transverse groove (1601) and a spiral groove (1602) connected with each other, and when the first limiting sliding block (1701) enters the spiral groove (1602) along the transverse groove (1601), the rotating rod (16) tends to rotate.

7. The plastic pail transfer apparatus of claim 5, wherein, The pushing assembly comprises a follower disc (21) and a movable sleeve (23) axially slidably installed on the rotating rod (16), the movable sleeve (23) is fixedly connected with the follower disc (21) and the second movable plate (30), the annular groove (2101) is formed on the follower disc (21), the pushing rod (22) penetrating the annular groove (2101) is fixedly arranged on the movable sleeve (23), and the follower ring (2201) abuttingly matched with the follower disc (21) is fixedly arranged on the pushing rod (22).

8. The plastic pail transfer apparatus of claim 5, wherein, The guide assembly comprises a guide groove formed on the mounting plate (11), the sliding groove (1501) is formed in the receiving plate (15), the sliding block (19) is slidably installed in the sliding groove (1501), the limiting column (20) and the connecting rod (18) are fixedly arranged on the side wall of the sliding block (19), the limiting column (20) is slidably embedded in the guide groove, and the connecting rod (18) is fixedly connected with the sliding sleeve (17).

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