Feeding mechanism for plastic plate edge cutting

Abstract

The utility model discloses a feeding mechanism for trimming a plastic plate. The feeding mechanism comprises a plurality of groups of rolling wheels arranged above an inlet of an edge trimmer, a first driving component for controlling the rolling wheels to ascend / descend, and a conveying belt positioned below the rolling wheels, the clamping arms are symmetrically arranged on one side of an inlet of the edge trimmer, the second driving assembly controls the clamping arms to do opening and closing movement, the third driving assembly controls the clamping arms to do longitudinal movement, the fourth driving assembly controls the clamping arms to do transverse movement, and a plurality of plates are stacked below the clamping arms; plates can be accurately grabbed and placed through the clamping arms. The clamping arms are controlled by a plurality of driving assemblies and can be opened, closed, longitudinally and transversely moved. Therefore, each step from stacking of the plates to the conveying belt can be accurately controlled, the degree of freedom of the plates in the placing process is reduced, and therefore the possibility of deviation is reduced.

Description

Technical Field

[0001] The utility model relates to a feeding mechanism for trimming plastic plates, belonging to the technical field of plastic plate processing. Background Art

[0002] A plastic sheet loading mechanism is a mechanical device designed to transport plastic sheets from a storage or stacking location to processing equipment. Existing loading mechanisms typically separate stacked plastic sheets from other sheets by clamping them, which can be achieved using vacuum suction cups, mechanical grippers, or other specialized tools.

[0003] The separated sheets are extracted from the stack by a robot or other transport device. The robot grips the sheet and moves it toward the conveyor belt, where it lowers and transfers it to the conveyor belt. The sheet needs to be accurately placed on the conveyor belt to prepare for subsequent processing.

[0004] However, due to the top-down motion of sheet metal during placement, mechanical placement can induce vibrations, leading to small deviations at the sheet's leading edge. Especially when processing longer sheets, these small deviations can gradually amplify during transfer, causing larger errors at the tail. This error can significantly impact downstream processing steps, potentially resulting in substandard product dimensions or reduced processing accuracy.

[0005] Therefore, the purpose of this study is to design a feeding mechanism that can solve the vibration and deviation problems during the feeding and processing of long plastic sheets. Utility Model Content

[0006] In view of the deficiencies in the prior art, the present invention aims to provide a feeding mechanism for trimming plastic sheets to solve the problems of the prior art.

[0007] In order to achieve the above purpose, the present invention is implemented through the following technical solutions:

[0008] A feeding mechanism for trimming plastic sheets, comprising: a plurality of rollers arranged above an inlet of a trimming machine, a first drive assembly for controlling the ascending / descending movement of the rollers, and a conveyor belt located below the rollers;

[0009] At least one set of clamping arms symmetrically arranged on one side of the trimming machine inlet, a second drive assembly for controlling the opening and closing movement of the clamping arms, a third drive assembly for controlling the longitudinal movement of the clamping arms, and a fourth drive assembly for controlling the lateral movement of the clamping arms, wherein a plurality of plates are stacked below the clamping arms;

[0010] A control module, wherein the control module, the first drive assembly, the second drive assembly, the third drive assembly, and the fourth drive assembly are electrically connected;

[0011] Through cooperation of the control module and the third driving assembly, the clamping arms are controlled to move downward, and cooperation of the second driving assembly controls the two clamping arms to open / close, and after clamping the plate, the clamping arms move upward;

[0012] Through cooperation of the control module and the fourth driving assembly, the plate is moved laterally to above the conveyor entrance, cooperation of the first driving assembly controls the roller wheel to descend, and the descending roller wheel presses the plate against the conveyor belt.

[0013] As a further improvement, the first driving assembly further comprises a first cylinder fixedly installed on the edge trimmer, and a first telescopic rod installed at the output end of the first cylinder, and the roller wheel is rotatably installed below the first telescopic rod.

[0014] As a further improvement, a first support frame on which the second driving assembly is installed is further included, the second driving assembly comprises a plurality of groups of second cylinders symmetrically installed below the first support frame, and the clamping arms are fixedly installed at the output ends of the second cylinders.

[0015] As a further improvement, the clamping arms comprise a second telescopic rod installed at the output end of the second cylinder, and a clamping piece installed at the end of the second telescopic rod, and the clamping pieces in the same group simultaneously adhere to and clamp the plate.

[0016] As a further improvement, a second support frame on which the third driving assembly is installed is further included, the third driving assembly comprises a first hydraulic pump installed on the second support frame, and a first piston rod inserted at the output end of the first hydraulic pump, and the end of the first piston rod is fixedly connected with the first support frame, the first piston rod is driven to extend / contract by the first hydraulic pump, and the first support frame is controlled to move longitudinally.

[0017] As a further improvement, a third support frame on which the fourth driving assembly is installed is further included, the fourth driving assembly comprises a second hydraulic pump installed on the third support frame, and a second piston rod inserted at the output end of the second hydraulic pump, and the end of the second piston rod is fixedly connected with the second support frame, the second piston rod is driven to extend / contract by the second hydraulic pump, and the second support frame is controlled to move laterally.

[0018] As a further improvement, the third support frame is provided with an inner guide rail on the side surface, the second support frame is provided with a sliding block, and the sliding block is slidingly installed in the guide rail.

[0019] As a further improvement, a visual sensor is arranged on one side of the first cylinder, the visual sensor is electrically connected with the control module, and through cooperation of the visual sensor and the control module, the moving state of the plate is monitored.

[0020] As a further improvement, a pressure sensor is provided at the connection between the roller and the first telescopic rod, and the pressure sensor is electrically connected to the control module, and the pressure applied by the roller on the plate is monitored by the pressure sensor.

[0021] The beneficial effects of the utility model are:

[0022] This utility model utilizes a gripping arm to precisely grasp and place sheets. The gripping arm is controlled by multiple drive components, enabling opening and closing, as well as longitudinal and lateral movement. This allows for precise control of each step from stacking to conveyor, reducing the degree of freedom of the sheet during placement and minimizing the likelihood of misalignment.

[0023] By installing multiple sets of rollers at the edge trimmer entrance and controlling the rollers' movement, we can apply appropriate pressure to the sheet material as it is placed, securing it firmly on the conveyor belt. This stabilizing effect effectively reduces sheet material deviation caused by vibration.

[0024] The third drive assembly controls the longitudinal movement of the gripping arm, ensuring that the sheet material is accurately moved to the required position before moving laterally. The fourth drive assembly controls the lateral movement of the gripping arm, accurately delivering the sheet material to the top of the conveyor entrance.

[0025] The control module is electrically connected to each drive component to achieve real-time control and adjustment of the clamping arm and roller. This allows for rapid response to errors and timely correction, further reducing the cumulative effect of offsets.

[0026] This solution can significantly reduce the vibration and deviation of the plate during placement, especially when processing longer plates, better ensuring that the plate can maintain the required position accuracy and dimensional specifications in subsequent processing links, ultimately improving product quality and output rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 The utility model is a side view structural diagram of a feeding mechanism for trimming plastic plates.

[0029] Figure 2 The utility model is a partially enlarged structural schematic diagram of a roller pressing wheel of a feeding mechanism for trimming plastic plates.

[0030] Figure 3 The utility model is an enlarged structural diagram of the fourth driving component of a feeding mechanism for trimming plastic plates.

[0031] Figure 4 The utility model is a structural schematic diagram of a feeding mechanism for trimming plastic plates in a clamping arm extension state.

[0032] Figure 5 The utility model is a structural schematic diagram of a feeding mechanism for trimming plastic plates in a retracted state of a clamping arm.

[0033] Figure 6 The utility model is a side view of an enlarged structural diagram of a roller pressing wheel of a feeding mechanism for trimming plastic plates.

[0034] Figure 7 The utility model is a schematic diagram of module control of a feeding mechanism for trimming plastic plates.

[0035] 1. Trimming machine; 2. Roller; 3. Conveyor belt; 4. Clamping arm; 5. First drive assembly; 51. First cylinder; 52. First telescopic rod; 6. Second drive assembly; 61. First support frame; 62. Second cylinder; 41. Second telescopic rod; 42. Clamping plate; 7. Third drive assembly; 71. Second support frame; 72. First hydraulic pump; 73. First piston rod; 8. Fourth drive assembly; 81. Third support frame; 82. Second hydraulic pump; 83. Second piston rod; 811. Inner guide rail; 711. Slider; 9. Plate; 10. Stacking rack; 21. Visual sensor; 22. Pressure sensor; 23. Micro motor. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically specified.

[0038] Reference Figure 1-7 As shown, a feeding mechanism for trimming plastic sheets comprises:

[0039] Multiple groups of rollers 2 are arranged above the entrance of the edge trimming machine 1, a first drive assembly 5 for controlling the ascending / descending movement of the rollers 2, and a conveyor belt 3 is located below the rollers 2;

[0040] At least one set of clamping arms 4 symmetrically arranged on one side of the inlet of the trimming machine 1, a second drive assembly 6 for controlling the opening and closing movement of the clamping arms 4, a third drive assembly 7 for controlling the longitudinal movement of the clamping arms 4, and a fourth drive assembly 8 for controlling the lateral movement of the clamping arms 4, with a plurality of plates 9 stacked below the clamping arms 4;

[0041] A control module 11, wherein the control module 11, the first drive assembly 5, the second drive assembly 6, the third drive assembly 7, and the fourth drive assembly 8 are electrically connected;

[0042] The control module 11 cooperates with the third drive assembly 7 to control the clamping arm 4 to move downward, and cooperates with the second drive assembly 6 to control the two clamping arms 4 to open / merge, clamping one plate 9 and then moving upward;

[0043] The control module 11 cooperates with the fourth drive component 8 to move the plate 9 horizontally to above the conveyor entrance, and cooperates with the first drive component 5 to control the roller wheel 2 to descend. The downward-moving roller wheel 2 presses the plate 9 against the conveyor belt 3.

[0044] In this embodiment, in order to improve the stable clamping state, the clamping arms 4 are provided in two groups.

[0045] The gripping arms 4 enable precise gripping and placement of the sheets 9. Controlled by multiple drive components, the gripping arms 4 are capable of opening and closing, as well as longitudinal and lateral movement. This allows precise control of each step of the sheet 9 from the stack to the conveyor 3, minimizing the degree of freedom of the sheet 9 during placement and reducing the likelihood of misalignment.

[0046] By installing multiple sets of rollers 2 at the entrance of the trimming machine 1 and controlling the lifting and lowering of the rollers 2, appropriate pressure can be applied when the sheet 9 is placed, thereby firmly securing the sheet 9 on the conveyor belt 3. This stabilizing effect effectively reduces the deviation of the sheet 9 caused by vibration.

[0047] The third drive assembly 7 controls the longitudinal movement of the gripping arm 4 to ensure that the sheet 9 can be accurately moved to the required position before moving laterally. The fourth drive assembly 8 controls the lateral movement of the gripping arm 4 to accurately deliver the sheet 9 to the top of the conveyor entrance.

[0048] The control module 11 is electrically connected to each drive assembly to achieve real-time control and adjustment of the clamping arm 4 and the roller 2. It can quickly respond to errors and make corrections in time, further reducing the cumulative effect of offsets.

[0049] This solution can significantly reduce the vibration and deviation of the plate 9 when it is placed, especially when processing longer plates 9, and better ensure that the plate 9 can maintain the required position accuracy and size specifications in subsequent processing links, ultimately improving the quality and output rate of the product.

[0050] The plate 9 is driven by the started transmission belt to be input into the trimming machine 1 .

[0051] The components involved in the above-mentioned process of clamping the plate 9 are refined, and also include installing the first support frame 61 of the second drive assembly 6, the second drive assembly 6 includes multiple groups of second cylinders 62 symmetrically installed below the first support frame 61, and the clamping arm 4 is fixedly installed at the output end of the second cylinder 62.

[0052] The clamping arm 4 includes a second telescopic rod 41 installed at the output end of the second cylinder 62 and a clamping piece 42 installed at the end of the second telescopic rod 41. The clamping pieces 42 of the same group are used to simultaneously clamp the plate 9.

[0053] The second cylinder 62 and the first support frame 61 provide a symmetrical clamping force, and multiple groups of cylinders evenly apply force, which can effectively avoid the deviation of the plate 9 caused by uneven force during the clamping process.

[0054] Through the action of the second adjustment cylinder, the clamping arm 4 can handle plates 9 of different sizes and thicknesses. The design of the second telescopic rod 41 enables the clamping piece 42 to be accurately adjusted to the required position, providing effective and stable clamping.

[0055] By fixing the clamping arm 4 to the output end of the second cylinder 62, maintenance and replacement of the clamping piece 42 becomes simpler, which facilitates daily inspection and maintenance and reduces downtime.

[0056] The clamping piece 42 is mounted on the end of the second telescopic rod 41. The synchronous operation of the clamping pieces 42 in the same group can ensure that a uniform clamping force is applied to the plate 9. This not only reduces the damage to the plate 9 that may be caused by single-point force application, but also improves the clamping accuracy and avoids uneven force on the plate 9.

[0057] The simultaneous laminating and clamping action of the clamping piece 42 enables fast and stable grabbing and placement of the plate 9, which can greatly improve the efficiency of the loading operation and is suitable for high-beat production requirements.

[0058] The lower side of the clamping piece 42 extends laterally toward one side of the plate 9 to form an inserting portion. The inserting portion is in contact with the plate 9 and inserted into the gap between the two plates 9, and then lifts the plate 9 by rising.

[0059] Furthermore, the stacked sheets 9 beneath the clamping plates 42 are positioned on a stacking rack 10. Adjacent sheets can be positioned at their bases with a lifting assembly, such as a hydraulic lift. Alternatively, the control module 11 can be used to preset the movement depth of the clamping plates 42 for each operation based on the thickness of the sheets 9. Alternatively, a visual sensor can be installed on the clamping plates 42 to combine vision with AI to determine the desired depth. In this embodiment, the control module 11 presets the movement depth of the clamping plates 42 for each operation based on the thickness of the sheets 9. Each cylinder is connected to an external air pump.

[0060] It also includes a second support frame 71 for installing the third drive assembly 7, and the third drive assembly 7 includes a first hydraulic pump 72 installed on the second support frame 71, and a first piston rod 73 inserted into the output end of the first hydraulic pump 72. The end of the first piston rod 73 is fixedly connected to the first support frame 61, and the first piston rod 73 is driven to extend and retract by the first hydraulic pump 72 to control the longitudinal movement of the first support frame 61.

[0061] It also includes a third support frame 81 on which the fourth drive assembly 8 is installed. The fourth drive assembly 8 includes a second hydraulic pump 82 installed on the third support frame 81, and a second piston rod 83 inserted into the output end of the second hydraulic pump 82. The end of the second piston rod 83 is fixedly connected to the second support frame 71. The second hydraulic pump 82 drives the second piston rod 83 to extend and retract, thereby controlling the lateral movement of the second support frame 71.

[0062] An inner guide rail 811 is provided on the side of the third support frame 81 , and a slider 711 is provided on the side of the second support frame 71 . The slider 711 is slidably installed in the guide rail.

[0063] The first piston rod 73 driven by the first hydraulic pump 72 controls the longitudinal movement of the first support frame 61, providing precise displacement control to adapt to different production needs, increasing the flexibility and adaptability of processing. Using hydraulic transmission ensures smooth and controllable movement, supports high load capacity, and effectively deals with larger or heavier plates 9.

[0064] The second piston rod 83 driven by the second hydraulic pump 82 controls the transverse movement of the second support frame 71, which can provide precise positioning during transverse adjustment, improving the conveying accuracy of the plate 9 in the horizontal plane.

[0065] Through the cooperation of the inner guide rail 811 on the side of the third support frame 81 and the slider 711 on the side of the second support frame 71, the smooth sliding of the slider 711 during movement is ensured, providing very precise guidance and preventing any unnecessary deviation.

[0066] Among them, the slider 711 is embedded with a ball bearing for reducing friction.

[0067] In order to guide the plate 9 moving between the roller 2 and the conveyor belt 3 onto the conveyor belt 3, the first drive assembly 5 further comprises a first cylinder 51 fixedly installed on the edge trimmer 1, and a first telescopic rod 52 installed at the output end of the first cylinder 51, and the roller 2 is rotatably installed below the first telescopic rod 52.

[0068] The use of the first cylinder 51 allows precise control of the lifting of the roller 2. The first cylinder 51 can output stable and adjustable force according to the preset needs, ensuring that when the roller 2 contacts the surface of the plate 9, it will not exert excessive pressure to cause deformation or damage to the plate 9.

[0069] The roller 2 is installed below the first telescopic rod 52, and its position can be accurately adjusted by the first cylinder 51, ensuring that it always maintains good contact with the surface of the plate 9 during the transmission process, reducing shaking and sliding, and guiding the plate 9 to enter the edge trimmer 1 smoothly.

[0070] A visual sensor 21 is arranged on one side of the first cylinder 51, and the visual sensor 21 is electrically connected with the control module 11. Through the cooperation of the visual sensor 21 and the control module 11, the movement state of the plate 9 is monitored.

[0071] A pressure sensor 22 is arranged at the connection between the roller 2 and the first telescopic rod 52, and the pressure sensor 22 is electrically connected with the control module 11. Through the pressure sensor 22, the pressure exerted by the roller 2 on the plate 9 is monitored.

[0072] A micro motor 23 is provided on the side of the roller 2, and the micro motor 23 is electrically connected to the control module 11. When the visual sensor 21 detects that one side is offset, the micro motor 23 corresponding to the other side is controlled to control the roller 2 on that side to stop rotating for a short time, and by increasing the friction force, the conveyor belt 3 cooperates to make a fine adjustment to the reverse force on the plate 9.

[0073] The visual sensor 21 installed on one side of the first cylinder 51 can monitor the movement status of the plate 9 in real time and transmit the collected data to the control module 11. This ensures that the position and direction of the plate 9 during the conveying process are accurate.

[0074] The application of the visual sensor 21 enhances the automation level of the system. By cooperating with the control module 11 and the micro motor 23 on the side of the roller 2, the position of the plate 9 can be automatically corrected, thereby reducing manual intervention and improving production efficiency.

[0075] The visual sensor 21 can quickly detect abnormal movement of the plate 9, and in conjunction with the roller 2, micro motor 23 and conveyor belt 3, can provide timely warning and correction, greatly reducing possible jamming or offset problems and improving system reliability.

[0076] By providing a pressure sensor 22 at the connection between the roller 2 and the first telescopic rod 52, the pressure exerted by the roller 2 on the plate 9 can be accurately monitored. This ensures that the plate 9 is subjected to appropriate pressure and avoids damage to the plate 9 that may be caused by overpressure.

[0077] By feeding back the data of the pressure sensor 22 to the control module 11, dynamic adjustment of the pressure can be achieved to ensure that appropriate pressure is applied under conditions of different plate thicknesses and materials, thereby improving processing quality.

[0078] If abnormal pressure is detected, the control module 11 can make adjustments or stop the operation in time to protect the mechanical parts and the plate 9 from damage and extend the service life of the equipment.

[0079] When measuring the pressure of a rolling wheel on the ground, it is crucial to properly position the pressure sensor 22 to ensure accurate measurement and avoid interfering with the normal rolling motion of the wheel. Thin-film pressure sensors 22 or strain gauge sensors can be used, which are easy to integrate into the mechanical system.

[0080] The pressure sensor 22 is mounted at the junction of the roller wheel 2's axle and the lower portion of the first telescopic rod 52. This mounting method is suitable for measuring changes in pressure on the axle, particularly for wheels with a certain degree of elasticity (such as rubber wheels). The sensor is mounted on the axle's support structure to measure the pressure transmitted by the axle. This prevents direct contact between the sensor and the ground and the external environment.

[0081] It should be noted that the device structure and drawings of the present invention mainly describe the principle of the present invention. In terms of the technology of the design principle, the settings of the device's power mechanism, power supply system, and control system are not fully described. However, those skilled in the art can clearly understand the details of its power mechanism, power supply system, and control system on the premise that they understand the principle of the above-mentioned utility model. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be implemented by simple programming by those skilled in the art.

[0082] The standard parts used can be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the components known to technical personnel in this field, their structures and principles can be known to these technical personnel through technical manuals or through conventional experimental methods.

[0083] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A feeding mechanism for trimming plastic sheets, characterized in that: include: A plurality of rollers (2) arranged above the entrance of the trimming machine (1), a first drive assembly (5) for controlling the ascending / descending movement of the rollers (2), and a conveyor belt (3) located below the rollers (2); At least one set of clamping arms (4) symmetrically arranged on one side of an inlet of a trimming machine (1), a second drive assembly (6) for controlling the opening and closing movement of the clamping arms (4), a third drive assembly (7) for controlling the longitudinal movement of the clamping arms (4), and a fourth drive assembly (8) for controlling the lateral movement of the clamping arms (4), wherein a plurality of plates (9) are stacked below the clamping arms (4); A control module (11), wherein the control module (11), the first drive assembly (5), the second drive assembly (6), the third drive assembly (7), and the fourth drive assembly (8) are electrically connected; The control module (11) cooperates with the third drive assembly (7) to control the clamping arm (4) to move downward, and cooperates with the second drive assembly (6) to control the two clamping arms (4) to open / merge, clamping one of the plates (9) and then moving upward; The control module (11) cooperates with the fourth drive assembly (8) to move the plate (9) horizontally to above the conveyor entrance, and cooperates with the first drive assembly (5) to control the roller (2) to descend, and the downward-moving roller (2) presses the plate (9) against the conveyor belt (3).

2. A feeding mechanism for trimming plastic sheets according to claim 1, characterized in that: The first driving assembly (5) further comprises a first cylinder (51) fixedly mounted on the trimming machine (1), and a first telescopic rod (52) mounted at the output end of the first cylinder (51), and the roller (2) is rotatably mounted below the first telescopic rod (52).

3. A feeding mechanism for trimming plastic sheets according to claim 2, characterized in that: It also includes a first support frame (61) for mounting the second drive assembly (6), the second drive assembly (6) includes a plurality of second cylinders (62) symmetrically mounted below the first support frame (61), and the clamping arm (4) is fixedly mounted on the output end of the second cylinder (62).

4. A feeding mechanism for trimming plastic sheets according to claim 3, characterized in that: The clamping arm (4) comprises a second telescopic rod (41) mounted on the output end of the second cylinder (62), and a clamping piece (42) mounted on the end of the second telescopic rod (41), and the plate (9) is clamped simultaneously by the clamping pieces (42) of the same group.

5. The feeding mechanism for trimming plastic sheet materials according to claim 4, characterized in that: The invention also includes a second support frame (71) for installing the third drive assembly (7), and the third drive assembly (7) includes a first hydraulic pump (72) installed on the second support frame (71), and a first piston rod (73) inserted into the output end of the first hydraulic pump (72), the end of the first piston rod (73) is fixedly connected to the first support frame (61), and the first hydraulic pump (72) drives the first piston rod (73) to extend and retract, thereby controlling the longitudinal movement of the first support frame (61).

6. A feeding mechanism for trimming plastic sheets according to claim 5, characterized in that: The invention also includes a third support frame (81) on which the fourth drive assembly (8) is installed. The fourth drive assembly (8) includes a second hydraulic pump (82) installed on the third support frame (81), and a second piston rod (83) inserted into the output end of the second hydraulic pump (82). The end of the second piston rod (83) is fixedly connected to the second support frame (71). The second hydraulic pump (82) drives the second piston rod (83) to extend and retract, thereby controlling the lateral movement of the second support frame (71).

7. A feeding mechanism for trimming plastic sheets according to claim 6, characterized in that: An inner guide rail (811) is provided on the side of the third support frame (81), and a slider (711) is provided on the side of the second support frame (71), and the slider (711) is slidably installed in the guide rail.

8. The feeding mechanism for trimming plastic sheet materials according to claim 2, characterized in that: A visual sensor (21) is provided on one side of the first cylinder (51), and the visual sensor (21) is electrically connected to the control module (11). The movement state of the plate (9) is monitored by the cooperation between the visual sensor (21) and the control module (11).

9. The feeding mechanism for trimming plastic sheet materials according to claim 7, characterized in that: A pressure sensor (22) is provided at the connection between the roller (2) and the first telescopic rod (52), and the pressure sensor (22) is electrically connected to a control module, and the pressure applied by the roller (2) on the plate (9) is monitored via the pressure sensor (22).

Images