Automatic edge trimming machine for cup rim of plastic cup

Abstract

The invention discloses an automatic edge trimming machine for a cup opening of a plastic cup, the automatic edge trimming machine comprises a base mechanism and a plastic cup main body, the base mechanism comprises a placing table serving as a base, and the upper end face of the placing table is fixedly connected with a supporting frame. Kinetic energy is transmitted through the chuck mechanism, the edge cutting mechanism drives an edge cutting knife to do annular motion, a cup opening of the plastic cup body is machined, the chuck mechanism cuts off the kinetic energy and connects the kinetic energy into the limiting mechanisms, and the translation mechanism drives the two limiting mechanisms to move. After the chuck mechanism connects kinetic energy into the limiting mechanisms through the transmission mechanism, one set of limiting mechanisms can retract to facilitate collection of workers, the other set of limiting mechanisms limit the plastic cup body, continuous machining can be achieved, and abrasion to the outer wall of the plastic cup body caused by rigid clamping is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of plastic cups, in particular to an automatic trimming machine for a plastic cup mouth. Background Art

[0002] In the manufacturing process of plastic cups, the application of technical means such as injection molding may cause burrs, flash or unevenness on the edge of the cup. These problems not only damage the appearance of the product, but also may bring safety risks such as scratches when consumers use it. Therefore, fine trimming of the edge of the plastic cup is an indispensable step in the production process. It can trim the edge of the plastic cup and remove excess material. The trimming machine, as an automated mechanical device designed specifically for the edge processing of plastic cups, plays a key role in ensuring product quality and safety.

[0003] In the process of conveying and positioning the plastic cup body, most existing equipment relies on complicated mechanical structures. They use pushing, clamping and other means to transport the plastic cup body to the processing area. However, this type of rigid transmission mode often exerts unnecessary pressure on the plastic cup body, especially for plastic cups with soft texture or irregular shape, which are more likely to cause deformation or damage, thereby adversely affecting the subsequent processing results and the quality of the final product. In addition, the existing limit devices are insufficient in stability and accuracy, which makes the plastic cup prone to position displacement during the processing process, which not only affects the trimming effect, but also reduces the product quality. At the same time, it is difficult to flexibly adapt to plastic cup bodies of different sizes and shapes, thereby limiting its versatility and the breadth of application scenarios.

[0004] Therefore, we propose an automatic trimming machine for the mouth of a plastic cup. Summary of the invention

[0005] The object of the present invention is to provide an automatic trimming machine for a plastic cup rim, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic trimming machine for the rim of a plastic cup, comprising a base mechanism and a plastic cup body, the base mechanism comprising a placing table as a base, the upper end surface of the placing table being fixedly connected to a support frame, the outer side wall of the support frame being provided with a feeding mechanism for storing and conveying the plastic cup body, a driving mechanism as a power source being provided on a side of the outer wall of the support frame close to the feeding mechanism, a trimming mechanism for removing excess material from the rim of the plastic cup body being provided below the feeding mechanism, the upper end surface of the placing table being located below the feeding mechanism, two groups of limiting mechanisms for limiting the position of the plastic cup body being provided, the upper end surface of the placing table being located on one side of the limiting mechanism, a translation mechanism for driving the two groups of limiting mechanisms to move being provided, a transmission mechanism for driving the limiting mechanism to work being provided on the side of the outer wall of the support frame close to the limiting mechanism, and a chuck mechanism for driving the trimming mechanism to rotate after the kinetic energy of the limiting mechanism is disconnected.

[0007] As a preferred embodiment of the above technical solution, the support frame is fixedly connected to the middle part of the upper end surface of the placement table, the inner side wall of the support frame is symmetrically fixedly connected with a fixing bracket, and the inner side wall of the fixing bracket is bolted with an auxiliary frame.

[0008] As a preferred embodiment of the above technical solution, the unloading mechanism includes a unloading barrel fixedly connected to the outer walls of several auxiliary frames, the plastic cup bodies are arranged and distributed inside the unloading barrel, the outer wall of the unloading barrel is fixedly connected with a ring, the outer wall of the unloading barrel is located below the ring and is fixedly connected with an extension plate, the lower end face of the extension plate is rotatably connected with a spiral rod for facilitating the unloading of the plastic cup body, the outer wall of the spiral rod is fixedly connected with a unloading gear, the outer wall of the ring is fixedly connected with several fixed sleeves for support in an annular array, the internal rotation of the fixed sleeve is sleeved with a first gear ring that meshes with the unloading gear, wherein the inner top ends of several of the fixed sleeves are fixedly connected with extension frames, and the internal rotations of several of the extension frames are sleeved with second gear rings.

[0009] As a preferred embodiment of the above technical solution, the driving mechanism includes a first connecting plate fixedly connected to the outer wall of the support frame, the lower end surface of the first connecting plate is fixedly connected to a driving motor as a power source, one of the output ends of the driving motor is fixedly connected to a first transmission rod, the end of the first transmission rod is fixedly connected to a first transmission gear meshing with a first gear ring, and the other output end of the driving motor is fixedly connected to a second transmission rod.

[0010] As a preferred embodiment of the above technical solution, the trimming mechanism includes a placement box fixedly connected to the inner wall of the second gear ring, a servo motor is fixedly connected to the interior of the placement box, a third transmission rod is fixedly connected to the output end of the servo motor, a tool holder is fixedly connected to the end of the third transmission rod, and the tool holder is located below the placement box, the third transmission rod passes through the bottom of the placement box, a trimming knife is threadedly connected to the internal thread of the tool holder, and a battery electrically connected to the servo motor is placed inside the placement box.

[0011] As a preferred embodiment of the above technical solution, the transmission mechanism includes a first gear seat fixedly connected to the outer wall of the support frame, the inner top end of the first gear seat is rotatably connected to the first bevel gear through a bearing, the inner side wall of the first gear seat is rotatably connected to the second bevel gear and the third bevel gear through a bearing, the first bevel gear is respectively meshed with the second bevel gear and the third bevel gear for transmission, the ends of the second bevel gear and the third bevel gear are fixedly connected to the spline shaft, and the two spline shafts are rotatably connected to the first gear seat, the outer wall of the spline shaft is slidably connected to the second gear seat, the inner wall of the second gear seat close to the first gear seat is rotatably connected to the fourth bevel gear, the inner bottom end of the second gear seat is fixedly connected to a synchronization plate, the upper end surface of the synchronization plate is located at a fifth bevel gear rotatably connected to the fourth bevel gear for transmission through a bearing, and the upper end surface of the synchronization plate is located below the fifth bevel gear and is coaxially fixedly connected to the first sprocket.

[0012] As a preferred embodiment of the above technical solution, the translation mechanism includes a translation plate slidably connected to the upper end surface of the placing table, the upper end surface of the placing table is located at one side of the translation plate and is fixedly connected to a support table, the outer wall of the support table is fixedly connected to a hydraulic push rod, the telescopic end of the hydraulic push rod is fixedly connected to a limiting plate, and the end of the limiting plate is fixedly connected to the center of the upper end surface of the translation plate, the upper end surface of the placing table is located at one side of the translation plate and is symmetrically fixedly connected to a bearing frame, the end of the spline shaft is fixedly connected to the bearing inside the bearing frame, the upper end surface of the placing table is located below the spline shaft and is fixedly connected to a slide rail, and the lower bottom ends of the two second gear seats are slidably connected to the inside of the slide rail.

[0013] The transmission gear of the present invention is a gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a first gear and a second gear selected from the group consisting of a The outer wall of the synchronous wheel is sleeved with a synchronous belt for transmission, and the upper end face of the synchronous wheel is fixedly connected with a spline sleeve, and the outer wall of the spline sleeve is slidably connected to the first main chuck that meshes with the first auxiliary chuck for transmission. One of the limit sleeves is rotatably sleeved on the outer wall of the first main chuck, and the spline sleeve and the synchronous wheel are rotatably connected to the outer wall of the main rotating shaft, and the upper end face of the other synchronous wheel is fixedly connected to the second auxiliary chuck, and the end of the first transmission rod is fixedly connected to the second auxiliary chuck, and the inner part of the second auxiliary chuck is rotatably sleeved with an auxiliary rotating shaft, and the outer wall of the auxiliary rotating shaft is provided with a spline groove, and the outer wall of the auxiliary rotating shaft is slidably connected to the second main chuck that meshes with the second auxiliary chuck for transmission, and the other limit sleeve is rotatably sleeved on the outer wall of the second main chuck, and the upper end of the auxiliary rotating shaft is fixedly connected to the second transmission gear that meshes with the second gear ring for transmission.

[0014] As a preferred embodiment of the above technical scheme, the limiting mechanism includes a bidirectional screw rod symmetrically rotatably connected to the upper end surface of the translation plate through a bearing, the outer wall of the bidirectional screw rod is symmetrically threaded with a movable plate, the two movable plates are fixedly connected to a first rotating shaft seat in a circular array on opposite sides, the inner wall of the first rotating shaft seat is rotatably sleeved with a clamping push rod, the end of the clamping push rod is rotatably sleeved with a second rotating shaft seat, the end of the second rotating shaft seat is fixedly connected to a tripod supporting the inner wall of the plastic cup body, the other end of the synchronization plate is arranged on the outer wall of the bidirectional screw rod through a bearing, the outer wall of the bidirectional screw rod is located above the synchronization plate and is coaxially fixedly connected to a second sprocket, and the outer walls of the first sprocket and the second sprocket are sleeved with a transmission chain for transmission.

[0015] As a preferred embodiment of the above technical solution, the moving distance of the translation plate is the distance between the center of the bidirectional screw and the center of the discharge barrel, and after each movement, the center of one of the limit mechanisms will coincide with the center of the discharge barrel.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention is provided with a feeding mechanism to transport the plastic cup body, and cooperates it with the limiting mechanism by free falling, so as to limit the plastic cup body, and then transmits kinetic energy through the chuck mechanism. At this time, the trimming mechanism will work, and the trimming knife will make a circular motion around the plastic cup body to remove the excess material on the cup mouth of the plastic cup body. When the trimming is completed, the kinetic energy is disconnected by the chuck mechanism and connected to the limiting mechanism. The synchronous translation mechanism will also drive the two groups of limiting mechanisms to move. After the chuck mechanism connects the kinetic energy to the limiting mechanism through the transmission mechanism, one group of limiting mechanisms will retract and no longer limit the plastic cup body to facilitate collection by the staff, while the other group limits the plastic cup body. At this time, the purpose of continuous processing can be achieved, and the wear of the outer wall of the plastic cup body caused by rigid clamping is reduced. At the same time, the centering of the limiting mechanism can also ensure the accuracy of the trimming process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall top view structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the overall outer side structure of the present invention;

[0021] Figure 4 It is a partial structural schematic diagram of the blanking mechanism of the present invention;

[0022] Figure 5 This is a schematic diagram of the split structure of the lower barrel of the present invention;

[0023] Figure 6 This is a schematic diagram of the blanking structure of the plastic cup body of the present invention;

[0024] Figure 7 It is a schematic diagram of the moving structure of the trimming mechanism of the present invention;

[0025] Figure 8 This is a schematic diagram of the split structure of the trimming mechanism of the present invention;

[0026] Fig. 9 It is a schematic diagram of the structure of the translation mechanism of the present invention;

[0027] Fig.10 It is a schematic diagram of the connection structure of the transmission mechanism and the limiting mechanism of the present invention;

[0028] Fig.11 It is a detailed structural diagram of the limiting mechanism of the present invention;

[0029] Fig.12 It is a detailed structural schematic diagram of the transmission mechanism of the present invention;

[0030] Fig.13 This is a schematic diagram of the disassembled structure of the chuck mechanism of the present invention;

[0031] Fig.14 It is a schematic diagram of the outer side structure of the support frame of the present invention.

[0032] In the figure: 1, base mechanism; 11, placement table; 12, support frame; 13, plastic cup body; 14, fixed bracket; 15, auxiliary frame; 2, unloading mechanism; 21, unloading barrel; 22, sleeve ring; 23, extension plate; 24, screw rod; 25, unloading gear; 26, fixed sleeve; 27, first gear ring; 28, extension frame; 29, second gear ring; 3, translation mechanism; 31, translation plate; 32, support table; 33, Hydraulic push rod; 34, limit plate; 35, slide rail; 36, bearing frame; 4, transmission mechanism; 41, first gear seat; 411, first bevel gear; 412, second bevel gear; 413, third bevel gear; 42, spline shaft; 43, second gear seat; 44, fourth bevel gear; 45, fifth bevel gear; 46, synchronous plate; 47, first sprocket; 48, second sprocket; 49, transmission chain; 5, driving mechanism; 51 , driving motor; 511, first connecting plate; 52, first transmission rod; 53, first transmission gear; 54, second transmission rod; 55, second transmission gear; 6, chuck mechanism; 61, electric push rod; 611, lower pressure plate; 612, limit sleeve; 613, three-prong plate; 614, second connecting plate; 62, main shaft; 63, spline sleeve; 631, first main chuck; 632, first auxiliary chuck; 64, auxiliary shaft; 641. spline groove; 65. second main chuck; 66. second auxiliary chuck; 67. synchronous wheel; 68. synchronous belt; 7. trimming mechanism; 71. placement box; 72. servo motor; 73. third transmission rod; 74. tool holder; 75. trimming knife; 76. battery; 8. limit mechanism; 81. bidirectional screw rod; 82. movable plate; 83. first rotating shaft seat; 84. clamping push rod; 85. tripod; 86. second rotating shaft seat. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1 - Figure 3The present invention provides a technical solution: an automatic trimming machine for the mouth of a plastic cup, comprising a base mechanism 1 and a plastic cup body 13, the base mechanism 1 comprising a placing table 11 as a base, the upper end surface of the placing table 11 is fixedly connected with a support frame 12, the outer side wall of the support frame 12 is provided with a feeding mechanism 2 for storing and conveying the plastic cup body 13, the outer wall of the support frame 12 is provided with a driving mechanism 5 as a power source on the side close to the feeding mechanism 2, the lower part of the feeding mechanism 2 is provided with a trimming mechanism 7 for removing excess material from the mouth of the plastic cup body 13, the upper end surface of the placing table 11 is located below the feeding mechanism 2 and is provided with two groups of A limiting mechanism 8 is used to limit the main body 13, and a translation mechanism 3 is arranged on one side of the upper end surface of the placement table 11 to drive the two groups of limiting mechanisms 8 to move. A transmission mechanism 4 is arranged on the side of the outer wall of the support frame 12 close to the limiting mechanism 8 to drive the limiting mechanism 8 to work, and a chuck mechanism 6 is arranged on the side of the outer wall of the support frame 12 close to the unloading mechanism 2 to drive the trimming mechanism 7 to rotate after the kinetic energy of the limiting mechanism 8 is disconnected. The support frame 12 is fixedly connected to the middle part of the upper end surface of the placement table 11, and the inner side wall of the support frame 12 is symmetrically fixedly connected with a fixed bracket 14, and the inner side wall of the fixed bracket 14 is bolted with an auxiliary bracket 15.

[0035] As a preferred embodiment of the above technical solution, the setting of the trimming mechanism 7 can accurately remove the excess material on the cup mouth of the plastic cup body 13, ensuring that the edge of the cup mouth of each plastic cup is flat and smooth and meets the quality standards, which not only improves the aesthetics of the product, but also enhances its safety and sealing during use. The combined use of the limiting mechanism 8 and the translation mechanism 3 enables the plastic cup body 13 to be stably positioned during the processing and moved to the next process in a timely manner. The design of two sets of limiting mechanisms 8 ensures the stability and accuracy of the plastic cup at different processing stages and avoids processing errors caused by position offset. The chuck mechanism 6 realizes the intelligent switching of the kinetic energy of the limiting mechanism 8 and the rotation of the trimming mechanism 7. When the positioning of the plastic cup body 13 is completed, the chuck mechanism 6 will automatically disconnect the kinetic energy of the limiting mechanism 8 and instead drive the trimming mechanism 7 to start working. This design not only saves energy, but also improves the response speed and flexibility of the equipment.

[0036] See also Figure 4 - Figure 6The unloading mechanism 2 includes a unloading barrel 21 fixedly connected to the outer walls of several auxiliary frames 15, the plastic cup bodies 13 are arranged and distributed inside the unloading barrel 21, the outer wall of the unloading barrel 21 is fixedly connected with a collar 22, the outer wall of the unloading barrel 21 is located below the collar 22 and is fixedly connected with an extension plate 23, the lower end surface of the extension plate 23 is rotatably connected with a screw rod 24 for convenient unloading of the plastic cup body 13, the outer wall of the screw rod 24 is fixedly connected with a unloading gear 25, the outer wall of the collar 22 is fixedly connected with several fixed sleeves 26 for support in a circular array, the interior of the fixed sleeve 26 is rotatably sleeved with a first gear ring 27 meshing with the unloading gear 25, wherein the inner top ends of several fixed sleeves 26 are fixedly connected with extension frames 28, and the interiors of several extension frames 28 are rotatably sleeved with second gear rings 29.

[0037] As a preferred embodiment of the above technical solution, the plastic cup bodies 13 arranged and distributed inside the discharge barrel 21 are discharged in an orderly manner through the rotation of the screw rod 24. The design of the screw rod 24 ensures that the plastic cups will not squeeze or get stuck with each other during the falling process, thereby ensuring the continuity and stability of the discharge. The discharge gear 25 fixedly connected to the outer wall of the screw rod 24 and the meshing transmission with the first gear ring 27 realize precise control of the screw rod 24. By adjusting the rotation speed and direction of the first gear ring 27, the discharge speed and sequence of the plastic cups can be flexibly adjusted to meet different production needs. The ring 22 and the extension plate 23 fixed on the outer wall of the discharge barrel 21 not only provide a stable support for the screw rod 24, but also enhance the stability of the entire discharge mechanism through the fixed sleeve 26 of the annular array.

[0038] See also Figure 3 - Figure 7 The driving mechanism 5 includes a first connecting plate 511 fixedly connected to the outer wall of the support frame 12, and the lower end surface of the first connecting plate 511 is fixedly connected to a driving motor 51 as a power source, one of the output ends of the driving motor 51 is fixedly connected to a first transmission rod 52, and the end of the first transmission rod 52 is fixedly connected to a first transmission gear 53 meshing with the first gear ring 27 for transmission, and the other output end of the driving motor 51 is fixedly connected to a second transmission rod 54.

[0039] As a preferred embodiment of the above technical solution, the driving motor 51 in the driving mechanism 5 is respectively connected to the first transmission rod 52 and the second transmission rod 54 through its dual output end design, so that the driving motor 51 can drive two independent transmission systems at the same time, realize the reasonable distribution and efficient use of power, and enhance the overall performance and stability of the equipment. The first transmission gear 53 fixed at the end of the first transmission rod 52 is meshed with the first gear ring 27 to realize the precise control of the screw rod 24 in the unloading mechanism 2. By adjusting the speed and direction of the driving motor 51, the rotation speed of the screw rod 24 can be accurately controlled to optimize the unloading speed of the plastic cup body 13, which not only improves the unloading efficiency, but also reduces the equipment downtime caused by poor unloading. The first connecting plate 511 in the driving mechanism 5 is a key component connecting the support frame 12 and the driving motor 51. Its fixed connection method not only ensures the stability of the entire driving mechanism, but also facilitates the daily maintenance and maintenance of the equipment. When the driving motor 51 needs to be repaired or replaced, it can be easily completed by loosening the fixing screws of the first connecting plate 511, which greatly reduces the maintenance cost and time.

[0040] See also Figure 7 - Figure 8 The trimming mechanism 7 includes a placement box 71 fixedly connected to the inner wall of the second gear ring 29, a servo motor 72 is fixedly connected to the inside of the placement box 71, a third transmission rod 73 is fixedly connected to the output end of the servo motor 72, a tool holder 74 is fixedly connected to the end of the third transmission rod 73, and the tool holder 74 is located below the placement box 71, the third transmission rod 73 passes through the bottom of the placement box 71, a trimming knife 75 is threadedly connected to the inside of the tool holder 74, and a battery 76 electrically connected to the servo motor 72 is placed inside the placement box 71.

[0041] As a preferred embodiment of the above technical solution, the trimming knife 75 threadedly connected to the internal thread of the knife holder 74 can achieve precise cutting of the edge of the cup mouth of the plastic cup body 13 under the drive of the second gear ring 29. By adjusting the steering direction of the third transmission rod 73 at the output end of the servo motor 72, the contact between the trimming knife 75 and the plastic cup body 13 can be accurately controlled to ensure that the trimming knife 75 can be kept away from the plastic cup body 13 when not in use to avoid damage to the cup mouth of the plastic cup body 13. When the trimming knife 75 is worn or damaged, there is no need to replace the entire trimming mechanism, only a new trimming knife 75 is needed, which greatly reduces maintenance costs and time. The electrical connection between the servo motor 72 and the battery 76 provides a stable and lasting power output for the trimming mechanism 7. When the power inside the battery 76 is used up, the user can take it out from the inside of the storage box 71 for quick replacement so as not to affect use.

[0042] See also Figure 3 - Fig.12The transmission mechanism 4 includes a first gear seat 41 fixedly connected to the outer wall of the support frame 12, the inner top of the first gear seat 41 is rotatably connected to the first bevel gear 411 through a bearing, the inner wall of the first gear seat 41 is rotatably connected to the second bevel gear 412 and the third bevel gear 413 through a bearing, the first bevel gear 411 is respectively meshed with the second bevel gear 412 and the third bevel gear 413 for transmission, the ends of the second bevel gear 412 and the third bevel gear 413 are fixedly connected to the spline shaft 42, and the two spline shafts 42 is rotationally connected to the first gear seat 41, the outer wall of the spline shaft 42 is slidably connected to the second gear seat 43, the inner wall of the second gear seat 43 is rotationally connected to the side close to the first gear seat 41, the inner bottom end of the second gear seat 43 is fixedly connected to a synchronization plate 46, the upper end surface of the synchronization plate 46 is located at the bottom of the fifth bevel gear 45 and is rotationally connected to the fourth bevel gear 44 through a bearing, and the upper end surface of the synchronization plate 46 is located below the fifth bevel gear 45 and is coaxially fixedly connected to the first sprocket 47.

[0043] As a preferred embodiment of the above technical solution, the first bevel gear 411 in the transmission mechanism 4 is meshed with the second bevel gear 412 and the third bevel gear 413 for transmission, respectively. This design enables power to be transmitted to two independent transmission paths at the same time, realizing power diversion and efficient utilization. The ends of the second bevel gear 412 and the third bevel gear 413 are fixedly connected with the spline shaft 42. The sliding connection design between the spline shaft 42 and the second gear seat 43 enables the second gear seat 43 to move along the axial direction of the spline shaft 42, which not only increases the flexibility of the transmission mechanism 4, but also enables the equipment to select different transmission paths according to production requirements to achieve more diversified functions. The meshing transmission of the fourth bevel gear 44 rotatably connected inside the second gear seat 43 and the fifth bevel gear 45 rotatably connected on the synchronization plate 46 ensures the accuracy and stability of power transmission. The sliding connection design between the spline shaft 42 and the second gear seat 43 not only increases the flexibility of the transmission mechanism 4, but also enables the equipment to adjust the position of the second gear seat 43 according to production requirements, thereby changing the transmission ratio and transmission path.

[0044] See also Figure 3 - Fig.14The translation mechanism 3 includes a translation plate 31 slidably connected to the upper end surface of the placement table 11, the upper end surface of the placement table 11 is located at one side of the translation plate 31 and is fixedly connected to a support table 32, the outer wall of the support table 32 is fixedly connected to a hydraulic push rod 33, the telescopic end of the hydraulic push rod 33 is fixedly connected to a limit plate 34, and the end of the limit plate 34 is fixedly connected to the center of the upper end surface of the translation plate 31, the upper end surface of the placement table 11 is located at one side of the translation plate 31 and is symmetrically fixedly connected to a bearing frame 36, the end of the spline shaft 42 is fixedly connected to the bearing inside the bearing frame 36, the upper end surface of the placement table 11 is located below the spline shaft 42 and is fixedly connected to a slide rail 35, and the lower bottom ends of the two second gear seats 43 are slidably connected to the inside of the slide rail 35.

[0045] As a preferred embodiment of the above technical solution, the translation mechanism 3 drives the limit plate 34 and the translation plate 31 to move linearly in a specific direction on the placement table 11 through the telescopic movement of the hydraulic push rod 33, ensuring the precise positioning of the plastic cup body 13 during the processing, reducing the processing error caused by position deviation, and thus improving the processing accuracy and consistency of the product. The sliding connection between the slide rail 35 in the translation mechanism 3 and the lower end of the second gear seat 43 provides a stable and smooth track for the movement of the second gear seat 43, effectively reducing vibration and impact during the movement, and ensuring the stability and continuity of the processing process. The telescopic length of the hydraulic push rod 33 can be flexibly adjusted according to actual processing requirements, thereby changing the moving distance and speed of the translation plate 31, and the processed plastic cup body 13 is moved out of the range of the discharge barrel 21 through the translation mechanism 3 to facilitate the user to collect it.

[0046] See also Fig.12 - Fig.14The chuck mechanism 6 includes a second connecting plate 614 symmetrically fixedly connected to the outer side wall of the support frame 12, and is located on the same side wall as the first connecting plate 511, an electric push rod 61 is fixedly connected to the bottom of one of the second connecting plates 614, the telescopic end of the electric push rod 61 is fixedly connected to the lower pressure plate 611, and both ends of the lower pressure plate 611 are fixedly connected to the limiting sleeve 612, the end of the first bevel gear 411 passes through the upper end surface of the first gear seat 41 and is fixedly connected to the main rotating shaft 62, and the end of the main rotating shaft 62 is connected to the other second connecting plate 614 through a bearing, and the outer wall of the main rotating shaft 62 is fixedly connected to the first auxiliary chuck 632, and the outer side wall of the support frame 12 is located on one side of one of the second connecting plates 614 and is fixedly connected to a three-fork plate 613, the main rotating shaft 62 is rotatably sleeved inside the three-fork plate 613 through a bearing, and the three-fork plate 613 is located above the first bevel gear 411, and the upper end surface of the three-fork plate 613 is symmetrically rotatably connected to the synchronous wheel 67, and the two synchronous wheels 67 The outer wall of the synchronous wheel 67 is sleeved with a synchronous belt 68 for transmission, the upper end surface of the synchronous wheel 67 is fixedly connected with a spline sleeve 63, the outer wall of the spline sleeve 63 is slidably connected with a first main chuck 631 that meshes with the first auxiliary chuck 632 for transmission, one of the limit sleeves 612 is rotatably sleeved on the outer wall of the first main chuck 631, the spline sleeve 63 and the synchronous wheel 67 are rotatably connected to the outer wall of the main shaft 62, the upper end surface of the other synchronous wheel 67 is fixedly connected with the second auxiliary chuck 66, the first transmission rod 52 The end is fixedly connected to the second auxiliary chuck 66, and the interior of the second auxiliary chuck 66 is rotatably sleeved with an auxiliary shaft 64, and the outer wall of the auxiliary shaft 64 is provided with a spline groove 641. The outer wall of the auxiliary shaft 64 is slidably connected with a second main chuck 65 meshing with the second auxiliary chuck 66 at the position of the spline groove 641, and another limit sleeve 612 is rotatably sleeved on the outer wall of the second main chuck 65, and the upper end of the auxiliary shaft 64 is fixedly connected with a second transmission gear 55 meshing with the second gear ring 29.

[0047] As a preferred embodiment of the above technical scheme, the chuck mechanism 6 realizes the input of kinetic energy to the main rotating shaft 6 through the meshing transmission of the first main chuck 631 and the second main chuck 65, and the pressing effect of the lower pressure plate 611 driven by the electric push rod 61. The main rotating shaft 62 in the chuck mechanism 6 is tightly connected with the second connecting plate 614 and the three-fork plate 613 through the bearing, and the transmission effect of the synchronous wheel 67 and the synchronous belt 68 can achieve the limitation of the plastic cup body 13 through the cooperation of the transmission mechanism 4 and the limiting mechanism 8 during use. The synchronous wheel 67 and the synchronous belt 68 in the chuck mechanism 6 have high transmission efficiency and can effectively reduce the energy loss in the transmission process. At the same time, the rotating sleeve design of the auxiliary rotating shaft 64 and the second auxiliary chuck 66, and the meshing transmission of the second transmission gear 55 and the second gear ring 29 further improve the efficiency and stability of power transmission, which not only reduces the energy consumption of the equipment, but also prolongs the service life of the transmission components. Through the chuck mechanism 6, the kinetic energy can be switched back and forth on the limiting mechanism and the trimming mechanism 7 at any time to improve the use efficiency.

[0048] See also Fig. 9 - Fig.11 The limiting mechanism 8 includes a bidirectional screw rod 81 which is symmetrically rotatably connected to the upper end surface of the translation plate 31 through a bearing, the outer wall of the bidirectional screw rod 81 is symmetrically threaded with a movable plate 82, and the opposite sides of the two movable plates 82 are fixedly connected with a first rotating shaft seat 83 in a ring array, the inner wall of the first rotating shaft seat 83 is rotatably sleeved with a clamping push rod 84, and the end of the clamping push rod 84 is rotatably sleeved with a second rotating shaft seat 86, and the end of the second rotating shaft seat 86 is fixedly connected with a tripod 85 supporting the inner wall of the plastic cup body 13, and the other end of the synchronous plate 46 is set on the outer wall of the bidirectional screw rod 81 through a bearing, and the outer wall of the bidirectional screw rod 81 is located above the synchronous plate 46 and is coaxially fixedly connected with the second sprocket 48, and the outer walls of the first sprocket 47 and the second sprocket 48 are sleeved with a transmission chain 49 for transmission.

[0049] As a preferred embodiment of the above technical solution, the limiting mechanism 8 drives the two movable plates 82 to move relative or oppositely along the axial direction thereof through the rotation of the bidirectional screw rod 81, thereby adjusting the supporting position of the tripod 85 on the inner side wall of the plastic cup body 13, effectively preventing the deformation and shaking of the plastic cup body during processing, ensuring the improvement of processing accuracy and the stability of product quality. At the same time, the triangular structure of the tripod 85 provides a stable supporting force, further enhancing the stability of the plastic cup body. When the bidirectional screw rod 81 rotates, the movable plate 82 drives the clamping push rod 84 and the tripod 85 to move synchronously, and the bidirectional screw rod 81 in the limiting mechanism 8 is rotated. The threaded sleeve design of the bidirectional screw 81 and the movable plate 82 allows the clamping push rod 84 and the tripod 85 to be flexibly adjusted according to the different sizes of the plastic cup body, reducing the cost and time of replacing the clamp. At the same time, by adjusting the rotation direction and speed of the bidirectional screw 81, the support and limiting force of the plastic cup body 13 can be accurately controlled. The synchronization plate 46 in the limiting mechanism 8 is set on the outer wall of the bidirectional screw 81 through a bearing, and is connected to the first sprocket 47 and the second sprocket 48 through a transmission chain 49, which can realize the rotation of the bidirectional screw 81, thereby achieving the purpose of limiting the plastic cup body 13.

[0050] See also Figure 3 and Fig. 9 The moving distance of the translation plate 31 is the distance between the center of the bidirectional screw rod 81 and the center of the discharge barrel 21 . After each movement, the center of one of the limiting mechanisms 8 will coincide with the center of the discharge barrel 21 .

[0051] As a preferred embodiment of the above technical solution, the moving distance of the translation plate 31 is precisely set to the distance between the center of the bidirectional screw 81 and the center of the discharge barrel 21. This design ensures that after each movement, the center of at least one limiting mechanism 8 can accurately coincide with the center of the discharge barrel 21, effectively avoiding position deviation during processing and improving the placement accuracy of the plastic cup body in the discharge barrel 21, thereby ensuring the consistency and accuracy of subsequent processing steps. By precisely controlling the moving distance of the translation plate 31, the equipment can automatically adjust the position of the limiting mechanism 8 so that it always maintains the best alignment with the discharge barrel 21. In the continuous production mode, this automated adjustment capability can ensure that each plastic cup body 13 can be placed in the shortest possible time. The processing can be completed within a certain time, thereby improving the overall production rhythm and capacity. Since the moving distance of the translation plate 31 can be precisely controlled, the equipment can easily adapt to plastic cup bodies 13 of different sizes. Whether it is a small-diameter cup or a large-diameter container, the equipment can ensure the alignment of the limiting mechanism 8 and the discharge barrel 21 by adjusting the position of the translation plate 31. During the processing, the stable support of the limiting mechanism 8 is crucial to maintaining the shape and position of the plastic cup body. By precisely controlling the moving distance of the translation plate 31, the equipment can ensure that the limiting mechanism 8 always provides stable support and limitation to the plastic cup body, which helps to reduce deformation and displacement during the processing, thereby improving the processing stability and quality consistency of the product.

[0052] For the processing of the mouth of the plastic cup body 13: the plastic cup body 13 is placed inside the discharge barrel 21, and then due to gravity, the plastic cup body 13 automatically drops, and a spiral rod 24 for assisting in discharging is symmetrically arranged below the discharge barrel 21, and the edge of the plastic cup body 13 contacts the spiral rod 24, when the output end of the driving motor 51 drives the first transmission rod 52 and the first transmission gear 53 to rotate, due to the meshing of the first transmission gear 53 with the first gear ring 27, the first gear ring 27 rotates, and the first gear ring 27 meshes with the discharge gear 25 on the outer wall of the spiral rod 24, so when the first gear ring 2 After the screw rod 24 rotates, the feeding gear 25 can be used to drive the transmission mechanism 4 to rotate. When the screw rod 24 rotates, the spiral blades on the outer wall of the screw rod 24 correspond to the interval between every two plastic cup bodies 13, so the plastic cup bodies 13 will fall one by one. When the plastic cup bodies 13 are separated from the screw rod 24, they will fall freely to the top of the bidirectional screw rod 81, and then the chuck mechanism 6 is used to transfer the kinetic energy to the transmission mechanism 4, and then the transmission mechanism 4 drives the limiting mechanism 8 to work. At this time, the two sets of limiting mechanisms 8 are meshed with the first bevel gear 411 through the second bevel gear 412 and the third bevel gear 413. The second bevel gear 412 and the third bevel gear 413 rotate in opposite directions, and the working directions of the two sets of limiting mechanisms 8 are also different. One set of limiting mechanisms 8 will be in a retracted state, while the other set of limiting mechanisms 8 will be in an expanded state, thereby limiting the plastic cup body 13 that falls on the bidirectional screw rod 81. When the plastic cup body 13 is limited, the chuck mechanism 6 is used to convert the kinetic energy again. At this time, with the help of the driving motor 51, the second transmission gear 55 will drive the second gear ring 29 to engage and transmit, and a trimming knife 75 is provided below the second gear ring 29, so the servo motor 72 is required to drive the third transmission rod 73 The knife holder 74 performs arc movement. When the trimming knife 75 fits the cup mouth of the plastic cup body 13, the second tooth ring 29 can be driven to move. At this time, with the help of the second tooth ring 29, the trimming knife 75 can trim the cup mouth of the plastic cup body 13, thereby removing excess material. Then, the elasticity of the hydraulic push rod 33 is used to drive the limit plate 34 and the translation plate 31 to perform translation movement, and the two limit mechanisms 8 located above the translation plate 31 will also move. When the other set of limit mechanisms 8 is located directly below the plastic cup body 13, it can stop moving, and the user can also remove the plastic cup body 13 after trimming.

[0053] Supplement to the chuck mechanism 6: Since the other output end of the driving motor 51 is fixedly connected to the second transmission rod 54, in order to realize the circular motion of the trimming mechanism 7 and the limiting effect of the limiting mechanism 8, the chuck mechanism 6 is required. When the telescopic end of the electric push rod 61 drives the lower pressure plate 611 and the limiting sleeve 612 to move upward, it will drive the first main chuck 631 to slide on the outer wall of the spline sleeve 63. As the electric push rod 61 is retracted, the first main chuck 631 and the first auxiliary chuck 632 re-engage for transmission, and the limiting sleeve 612 at the other end drives the second main chuck 65 to separate from the second auxiliary chuck 66. Since the outer walls of the first transmission rod 52 and the spline sleeve 63 are fixedly connected with the synchronous wheel 67, and synchronous transmission is performed through the synchronous belt 68, when the first transmission rod 52 After the rotation, the synchronous belt 68 can be rotated through the synchronous wheel 67. At this time, the synchronous belt 68 will drive the spline sleeve 63 to rotate. Since the first main chuck 631 and the first auxiliary chuck 632 are meshed and transmitted, the main shaft 62 will drive the first bevel gear 411 to rotate. At this time, with the help of the transmission mechanism 4, the limiting mechanism 8 will work. Since the second main chuck 65 and the second auxiliary chuck 66 are no longer meshed, the second transmission gear 55 will no longer rotate. When the second transmission gear 55 needs to rotate, the lower pressure plate 611 drives the second main chuck 65 to move downward, so that the second main chuck 65 and the second auxiliary chuck 66 are re-engaged, and the second auxiliary chuck 66 is fixedly connected to the first transmission rod 52. Therefore, after the two are meshed, the auxiliary shaft 64 can be rotated, thereby driving the second transmission gear 55 to work;

[0054] Supplement to the transmission mechanism 4: When the first bevel gear 411 drives the second bevel gear 412 and the third bevel gear 413 to rotate, the two spline shafts 42 will rotate and drive the fourth bevel gear 44 and the fifth bevel gear 45 on the outer wall of the spline shaft 42 to engage and transmit. When the fifth bevel gear 45 rotates, it will coaxially drive the first sprocket 47 and the transmission chain 49 below to rotate. Since the second sprocket 48 is provided on the outer wall of the bidirectional screw rod 81 and connected by the transmission chain 49, at this time, when the first sprocket After 47 rotates, the bidirectional screw rod 81 will also rotate to work. In order to ensure that the transmission chain 49 always transmits the transmission with the first sprocket 47 and the second sprocket 48, a synchronous plate 46 is provided at the inner bottom end of the second gear seat 43, and the other end of the synchronous plate 46 is rotatably connected to the outer wall of the bidirectional screw rod 81. Therefore, when the translation plate 31 drives the two sets of limiting mechanisms 8 to move, the synchronous plate 46 can also ensure the synchronization of the second gear seat 43, thereby further ensuring the transmission effect of the transmission chain 49.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic trimming machine for a plastic cup, comprising a base mechanism (1) and a plastic cup body (13), characterized in that: The base mechanism (1) comprises a placing table (11) as a base, the upper end surface of the placing table (11) is fixedly connected to a support frame (12), the outer side wall of the support frame (12) is provided with a feeding mechanism (2) for storing and conveying a plastic cup body (13), a driving mechanism (5) as a power source is provided on the side of the outer wall of the support frame (12) close to the feeding mechanism (2), a trimming mechanism (7) for removing excess material from the cup mouth of the plastic cup body (13) is provided below the feeding mechanism (2), and the upper end surface of the placing table (11) is located at the feeding mechanism Two groups of limiting mechanisms (8) for limiting the position of the plastic cup body (13) are arranged below (2); a translation mechanism (3) for driving the two groups of limiting mechanisms (8) to move is arranged on the upper end surface of the placement table (11) located on one side of the limiting mechanism (8); a transmission mechanism (4) for driving the limiting mechanism (8) to work is arranged on the side of the outer wall of the support frame (12) close to the limiting mechanism (8); a chuck mechanism (6) for driving the trimming mechanism (7) to rotate after disconnecting the kinetic energy of the limiting mechanism (8) is arranged on the side of the outer wall of the support frame (12) close to the unloading mechanism (2).

2. The automatic trimming machine for plastic cup rim according to claim 1, characterized in that: The support frame (12) is fixedly connected to the middle part of the upper end surface of the placement table (11); the inner side wall of the support frame (12) is symmetrically fixedly connected to a fixed bracket (14); and the inner side wall of the fixed bracket (14) is bolted to an auxiliary bracket (15).

3. The automatic trimming machine for plastic cup rim according to claim 1, characterized in that: The unloading mechanism (2) comprises an unloading barrel (21) fixedly connected to the outer walls of a plurality of auxiliary frames (15); the plastic cup bodies (13) are arranged and distributed inside the unloading barrel (21); a collar (22) is fixedly connected to the outer wall of the unloading barrel (21); an extension plate (23) is fixedly connected to the outer wall of the unloading barrel (21) below the collar (22); a screw rod (24) is rotatably connected to the lower end surface of the extension plate (23) for facilitating unloading of the plastic cup bodies (13); The outer wall of the spiral rod (24) is fixedly connected to a feeding gear (25); the outer wall of the collar (22) is fixedly connected to a plurality of fixed sleeves (26) for support in an annular array; the interior of the fixed sleeve (26) is rotatably sleeved with a first gear ring (27) meshing with the feeding gear (25); the inner top ends of a plurality of the fixed sleeves (26) are fixedly connected to extension frames (28); and the interiors of a plurality of the extension frames (28) are rotatably sleeved with a second gear ring (29).

4. The automatic trimming machine for plastic cup rim according to claim 1, characterized in that: The driving mechanism (5) comprises a first connecting plate (511) fixedly connected to the outer side wall of the support frame (12); a driving motor (51) as a power source is fixedly connected to the lower end surface of the first connecting plate (511); one output end of the driving motor (51) is fixedly connected to a first transmission rod (52); an end of the first transmission rod (52) is fixedly connected to a first transmission gear (53) meshing with a first gear ring (27); and the other output end of the driving motor (51) is fixedly connected to a second transmission rod (54).

5. The automatic trimming machine for plastic cup rim according to claim 1, characterized in that: The trimming mechanism (7) comprises a placement box (71) fixedly connected to the inner wall of the second gear ring (29); a servo motor (72) is fixedly connected to the interior of the placement box (71); an output end of the servo motor (72) is fixedly connected to a third transmission rod (73); an end of the third transmission rod (73) is fixedly connected to a tool holder (74), and the tool holder (74) is located below the placement box (71); the third transmission rod (73) passes through the bottom of the placement box (71); a trimming knife (75) is threadedly connected to the interior of the tool holder (74); and a storage battery (76) electrically connected to the servo motor (72) is placed inside the placement box (71).

6. The automatic trimming machine for plastic cup rim according to claim 4, characterized in that: The transmission mechanism (4) comprises a first gear seat (41) fixedly connected to the outer wall of the support frame (12); the inner top end of the first gear seat (41) is rotatably connected to a first bevel gear (411) via a bearing; the inner wall of the first gear seat (41) is rotatably connected to a second bevel gear (412) and a third bevel gear (413) via a bearing; the first bevel gear (411) is meshed with the second bevel gear (412) and the third bevel gear (413) for transmission respectively; the ends of the second bevel gear (412) and the third bevel gear (413) are both fixedly connected to a spline shaft (42); and the two spline shafts ( 42) is rotatably connected to the first gear seat (41), the outer wall of the spline shaft (42) is slidably connected to the second gear seat (43), the inner wall of the second gear seat (43) is rotatably connected to the side of the first gear seat (41), the inner bottom end of the second gear seat (43) is fixedly connected to a synchronization plate (46), the upper end surface of the synchronization plate (46) is located at the bottom of the fifth bevel gear (45) which is rotatably connected to the fourth bevel gear (44) through a bearing, and the upper end surface of the synchronization plate (46) is located below the fifth bevel gear (45) and is coaxially fixedly connected to the first sprocket (47).

7. The automatic trimming machine for the mouth of a plastic cup according to claim 6, characterized in that: The translation mechanism (3) comprises a translation plate (31) slidably connected to the upper end surface of the placement table (11); the upper end surface of the placement table (11) is located at one side of the translation plate (31) and is fixedly connected to a support table (32); the outer wall of the support table (32) is fixedly connected to a hydraulic push rod (33); the telescopic end of the hydraulic push rod (33) is fixedly connected to a limit plate (34), and the end of the limit plate (34) is fixedly connected to the center of the upper end surface of the translation plate (31); the upper end surface of the placement table (11) is located at one side of the translation plate (31) and is symmetrically fixedly connected to a bearing frame (36); the end of the spline shaft (42) is fixedly connected to the bearing inside the bearing frame (36); the upper end surface of the placement table (11) is located below the spline shaft (42) and is fixedly connected to a slide rail (35), and the lower bottom ends of the two second gear seats (43) are slidably connected to the inside of the slide rail (35).

8. The automatic trimming machine for the mouth of a plastic cup according to claim 6, characterized in that: The chuck mechanism (6) comprises a second connecting plate (614) symmetrically fixedly connected to the outer wall of the support frame (12) and located on the same side wall as the first connecting plate (511), wherein an electric push rod (61) is fixedly connected below one of the second connecting plates (614), the telescopic end of the electric push rod (61) is fixedly connected to a lower pressure plate (611), both ends of the lower pressure plate (611) are fixedly connected to a limiting sleeve (612), the end of the first bevel gear (411) passes through the upper end surface of the first gear seat (41) and is fixedly connected to a main rotating shaft (62), and the main rotating shaft ( The end of the main rotating shaft (62) is connected to another second connecting plate (614) through a bearing. The outer wall of the main rotating shaft (62) is fixedly connected to a first auxiliary chuck (632). The outer wall of the support frame (12) is located on one side of one of the second connecting plates (614) and is fixedly connected to a three-pronged plate (613). The main rotating shaft (62) is rotatably sleeved inside the three-pronged plate (613) through a bearing, and the three-pronged plate (613) is located above the first bevel gear (411). The upper end surface of the three-pronged plate (613) is symmetrically rotatably connected to a synchronous wheel (67). The two synchronous wheels (67) The outer wall of the synchronous wheel (67) is sleeved with a synchronous belt (68) for transmission, the upper end surface of the synchronous wheel (67) is fixedly connected with a spline sleeve (63), the outer wall of the spline sleeve (63) is slidably connected with a first main chuck (631) meshing with the first auxiliary chuck (632) for transmission, one of the limit sleeves (612) is rotatably sleeved on the outer wall of the first main chuck (631), the spline sleeve (63) and the synchronous wheel (67) are rotatably connected to the outer wall of the main shaft (62), the upper end surface of the other synchronous wheel (67) is fixedly connected with a second auxiliary chuck (66), the first transmission rod (52) The end portion is fixedly connected to the second auxiliary chuck (66); the interior of the second auxiliary chuck (66) is rotatably sleeved with an auxiliary shaft (64); the outer wall of the auxiliary shaft (64) is provided with a spline groove (641); the outer wall of the auxiliary shaft (64) is slidably connected with a second main chuck (65) meshing with the second auxiliary chuck (66) at the position of the spline groove (641); and the other limiting sleeve (612) is rotatably sleeved on the outer wall of the second main chuck (65); the upper end of the auxiliary shaft (64) is fixedly connected with a second transmission gear (55) meshing with the second gear ring (29) for transmission.

9. The automatic trimming machine for the mouth of a plastic cup according to claim 6, characterized in that: The limiting mechanism (8) comprises a bidirectional screw rod (81) symmetrically rotatably connected to the upper end surface of the translation plate (31) through a bearing, the outer wall of the bidirectional screw rod (81) is symmetrically threadedly sleeved with a movable plate (82), and the two opposite sides of the two movable plates (82) are fixedly connected with a first rotating shaft seat (83) in a ring array, the inner wall of the first rotating shaft seat (83) is rotatably sleeved with a clamping push rod (84), the end of the clamping push rod (84) is rotatably sleeved with a second rotating shaft seat (86), and the end of the second rotating shaft seat (86) is fixedly connected with a tripod (85) supporting the inner wall of the plastic cup body (13), the other end of the synchronous plate (46) is arranged on the outer wall of the bidirectional screw rod (81) through a bearing, the outer wall of the bidirectional screw rod (81) is located above the synchronous plate (46) and is coaxially fixedly connected with a second sprocket (48), and the outer walls of the first sprocket (47) and the second sprocket (48) are sleeved with a transmission chain (49) for transmission.

10. The automatic trimming machine for plastic cup rim according to claim 7, characterized in that: The moving distance of the translation plate (31) is the distance between the center of the bidirectional screw (81) and the center of the discharge barrel (21). After each movement, the center of one of the limiting mechanisms (8) will coincide with the center of the discharge barrel (21).

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