Sheet feeder capable of realizing non-stop reloading

Abstract

The invention provides a non-stop reloading sheet feeder. The non-stop reloading sheet feeder comprises a stock bin assembly, a carrying assembly, a stripping assembly and a receiving and positioning platform, the stock bin assembly comprises a front stock bin and a rear stock bin, a first motor drives the stock bin assembly to rotate by 180 degrees to achieve switching of the feed bins, the rear stock bin can supplement materials at the material supplementing position, and therefore material replacement is achieved without shutdown; a lifting mechanism is arranged at the feeding position, first supporting teeth and second supporting teeth at the bottom of the stock bin are staggered to lift the sheet stock, a second motor drives a synchronous belt to ascend and descend, and lifting and positioning are achieved in cooperation with a sensor; a sensor is additionally arranged to detect the rotation angle; the carrying assembly adopts an X / Z axis and a suction cup to take and place sheet materials; the stripping assembly clamps the release base material to realize label stripping; the material receiving positioning platform drives clamping plates through two air cylinders to adjust a positioning frame so as to adapt to sheet materials of different sizes. Non-stop material changing is achieved through switching of the double material bins, and the continuity, stability and adaptability of taking, placing, stripping and positioning of the sheet materials are remarkably improved by combining clamping stripping and the adjustable positioning platform.

Description

Technical Field

[0001] This invention relates to the field of automation equipment technology, specifically to a feeder for changing sheet materials without shutting down the machine. Background Technology

[0002] Sheet feeders (also known as sheet feeding devices or label feeding feeders) are widely used in automated production lines for labeling, die-cutting feeding, transfer, and pre-assembly attachment. They typically take stacked sheet materials (such as label sheets, films, and auxiliary material sheets with release liner) from the hopper, transport them to the peeling station via a conveying mechanism to separate the label from the release liner, and then transfer and place the label to the receiving and positioning platform or subsequent station to achieve continuous, high-speed automatic feeding and positioning.

[0003] The shortcomings of existing technology: 1. Material changes rely on downtime, resulting in poor production line continuity. Existing equipment mostly adopts a single hopper feeding structure. After the sheet material is used up, the machine needs to be stopped, the cover opened, the material replenished, the machine reset, and then restarted. During the material change, the production line is interrupted, resulting in cycle time loss. In addition, frequent start and stop can easily cause zero-return error of the mechanism, positioning deviation and yield fluctuation, making it difficult to meet the needs of continuous production.

[0004] 2. Lack of a "main material supplier + supplementary material supplier" division of labor structure, resulting in interference between the supply and supplementary material suppliers. Even if some equipment attempts to set up dual material bins, they are usually arranged in parallel or side by side, lacking a clear separation and switching mechanism between the material supply position and the material replenishment position. When replenishing material, it is easy to occupy the material picking space or affect the material picking path, resulting in material replenishment interfering with the material supply, making it difficult to truly achieve material change without stopping the machine.

[0005] 3. The switching mechanism is unreliable, and the switching position is difficult to control precisely. Existing material switching methods mostly rely on mechanical stops or simple indexing structures, lacking sensor detection and closed-loop control for accurate rotation. Incomplete switching can lead to misalignment of the hopper, displacement of the material pick-up position, or even material jamming. In severe cases, manual intervention is required, affecting equipment stability.

[0006] 4. The stacking height of the sheet materials varies greatly, making it difficult to stabilize the material removal height and resulting in a low material removal success rate. Relying solely on suction cups to reach and pick up materials can easily lead to problems such as failure to pick up the material, picking up too many sheets, picking up the wrong sheet, or picking up the bottom material when faced with changes in stacking height, sheet warping, friction and adhesion. Without an effective lifting mechanism to maintain a stable height of the top sheet, it is difficult to balance the equipment cycle time and the reliability of material picking.

[0007] 5. The lifting structure is prone to interference or cannot be adapted to material changing operations. Although some equipment is equipped with lifting components, there is a lack of staggered avoidance design between the lifting components and the bottom support structure of the hopper. During the switching or resetting of the hopper, the lifting components may interfere with the bottom structure of the hopper, resulting in scraping, jamming or scattering of sheet material, making it unsuitable for switching scenarios without stopping the machine.

[0008] 6. Poor adaptability of material receiving and positioning, making it difficult to accommodate sheets / labels of different sizes. Common receiving platforms are fixed-size positioning frames or fixed-edge structures. Different sized sheet materials require changing fixtures or manual adjustment, resulting in high changeover costs and low efficiency. At the same time, the positioning accuracy is limited, which can easily lead to misalignment and affect the consistency of subsequent attachment or assembly.

[0009] Therefore, existing technologies have shortcomings and need further improvement. Summary of the Invention

[0010] To address the problems existing in the prior art, the present invention provides a feeder for changing sheet material without shutting down the machine.

[0011] To achieve the above objectives, the specific solution of the present invention is as follows: This invention provides a non-stop feeder for changing sheet metal, comprising: A frame, and a hopper assembly, a conveying assembly, a stripping assembly, and a receiving and positioning platform mounted on the frame; The sheet material includes a release liner and a label attached to the release liner; The hopper assembly is used to store stacked sheets and to provide the sheets to be picked up to the conveying assembly; The conveying assembly is used to move the label pieces between the hopper assembly, the peeling assembly, and the receiving and positioning platform; The peeling component is used to hold the release liner so that the transport component peels the label off the release liner when it carries the label away from the peeling component; The receiving and positioning platform is used to receive and position the label pieces transported by the handling components; The hopper assembly includes a front hopper and a rear hopper, which are configured as two interchangeable feeding hoppers; when one feeding hopper is in the feeding position and feeding the conveying assembly, the other feeding hopper is in the replenishing position to replenish the sheet material; The hopper assembly also includes a rotary drive mechanism for driving the front hopper and the rear hopper to rotate around a vertical axis. After the sheet material in the front hopper and the rear hopper is used up at the feeding position, they rotate 180° to exchange the feeding position and the replenishment position. This allows the feeding hopper to continue feeding after the rotation and allows the feeding hopper that has rotated to the replenishment position to be replenished, thus achieving material change without stopping the machine.

[0012] Furthermore, the rotary drive mechanism includes a first motor, the output shaft of which is vertically arranged; the front hopper and the rear hopper are mounted back-to-back on the output shaft of the first motor, and the first motor drives the output shaft to rotate to realize the front and rear switching of the front hopper and the rear hopper; The front hopper and the rear hopper are an integral structure and are separated by a partition.

[0013] Furthermore, a lifting mechanism is provided on one side of the feeding position, which is used to lift the stacked sheets in the feeding bin of the feeding position and move them upward to a set picking height; The lifting mechanism includes two parallel first vertical slide rails, a first slider that can slide up and down along the first vertical slide rails, a first mounting plate mounted on the first slider, and a plurality of first support teeth disposed on the first mounting plate; the bottom of both the front hopper and the rear hopper is provided with a plurality of second support teeth for supporting the stacked sheet material; the first support teeth and the second support teeth are staggered in the horizontal direction, and the first support teeth can pass through the gaps between the second support teeth in the vertical direction and support the stacked sheet material when rising to achieve lifting; When the front hopper and the rear hopper rotate 180° to switch, the first support tooth descends below the second support tooth to avoid interference with the second support tooth.

[0014] Furthermore, the lifting mechanism also includes a second motor, a first synchronous belt, a first driving wheel, and a first driven wheel; the first synchronous belt is wound between the first driving wheel and the first driven wheel, and the first driving wheel is mounted on the output shaft of the second motor; the first slider is fixed to the first synchronous belt by a first clamp, and the second motor drives the first synchronous belt to circulate so as to drive the first slider and the first support tooth to move up and down along the first vertical slide rail.

[0015] Furthermore, a first sensing plate is installed on the first clamp; a first sensor and a second sensor are arranged along the up and down movement path of the first sensing plate to detect the upper and lower limit positions of the first slider and realize the positioning of the first support tooth, and the first sensor is arranged above the second sensor. A second sensing plate is provided on the output shaft of the first motor, and a third sensor is provided along the rotation path of the second sensing plate to detect the rotation angle of the output shaft of the first motor and to control the switching of the front hopper and the rear hopper into position.

[0016] Furthermore, the conveying assembly includes a first X-axis assembly, a first Z-axis assembly, and a suction cup assembly; the first Z-axis assembly is mounted on the first X-axis assembly and can move horizontally with the first X-axis assembly, and the suction cup assembly is mounted on the first Z-axis assembly and can move vertically with the first Z-axis assembly; the suction cup assembly is provided with a plurality of suction cups for adsorbing the label.

[0017] Furthermore, the peeling assembly includes a second mounting plate, a first cylinder, a third mounting plate, and a first clamping plate; the first cylinder is mounted on the second mounting plate with its output shaft vertically oriented, and the third mounting plate is mounted on the output shaft of the first cylinder; the first clamping plate is vertically mounted on the third mounting plate and faces the second mounting plate; the first cylinder drives the first clamping plate to move closer to or away from the second mounting plate, so that the first clamping plate and the second mounting plate clamp or release the release liner, thereby peeling the label from the release liner when the conveying assembly adsorbs and pulls away the label.

[0018] Furthermore, the receiving and positioning platform includes a first platform, a first positioning seat installed on the upper part of the first platform, a second cylinder, a third cylinder, a second clamping plate, and a third clamping plate; The first positioning seat is used to position and place the label piece. A first through slot and a second through slot are respectively opened on the two adjacent sides of the first positioning seat on the first platform; the second cylinder and the third cylinder are installed on the lower side of the first platform, the output shaft of the second cylinder is parallel to the short side of the first positioning seat, and the output shaft of the third cylinder is parallel to the long side of the first positioning seat; the second clamping plate is installed on the output shaft of the second cylinder and extends upward through the first through slot, and the third clamping plate is installed on the output shaft of the third cylinder and extends upward through the second through slot; the second cylinder is used to drive the second clamping plate to move relative to the first positioning seat to change the distance between the second clamping plate and the long side of the first positioning seat, and the third cylinder is used to drive the third clamping plate to move relative to the first positioning seat to change the distance between the third clamping plate and the short side of the first positioning seat, thereby forming an adjustable positioning frame to adapt to the label pieces of different sizes.

[0019] Furthermore, it also includes a controller and a memory. The memory stores a control program that can be executed by the controller. The controller is electrically connected to the first motor, the second motor, and the conveying assembly. When the control program is executed, it is used to: when the rear hopper is in the replenishment position, control the lifting mechanism to lift the sheet material in the rear hopper to a preset picking height and control the conveying assembly to perform a trial suction action on the sheet material at the top of the rear hopper, so as to determine the feeding readiness state of the rear hopper based on whether the vacuum degree of the suction cup assembly reaches a preset threshold during the trial suction process; when the feeding readiness state is satisfied and the switching window conditions are met, control the first motor to drive the front hopper and the rear hopper to rotate 180° to complete the feeding hopper switching, wherein the switching window conditions include: the suction cup assembly is at a preset safety height and away from the interference area between the peeling assembly and the receiving positioning platform; the peeling assembly is in the state of releasing the release material; and the receiving positioning platform is in the state of allowing material release.

[0020] Furthermore, it also includes a vision inspection component and an image processing module. The vision inspection component includes a camera and a light source. The camera is positioned at one of the material picking position, the peeling position, and the receiving positioning platform to acquire images of the label sheet. The image processing module is used to identify the images to output the offset and defect type of the label sheet. The controller controls the conveying component to compensate for the picking and placing position and controls the peeling parameters of the peeling component to adjust according to the offset and defect type. The compensation includes compensation for the picking and placing position of the first X-axis component and compensation for the material placement height of the first Z-axis component. The peeling parameters include at least the peeling speed and the clamping force on the release material.

[0021] The technical solution of this invention has the following beneficial effects: 1. Enables non-stop material change, improving production line continuity and overall efficiency. By setting up a front hopper and a rear hopper in the hopper assembly and allowing them to switch 180°, the rear hopper can be replenished while the front hopper is supplying material. Once the material in the front hopper is depleted, the system can quickly switch to the rear hopper to continue supplying material, thus avoiding the problem of needing to stop the machine to replenish material in the traditional single hopper. This significantly reduces downtime for material changes and improves production line cycle time and equipment utilization.

[0022] 2. The division of labor between material supply and replenishment is clear, reducing the interference of material change on the material supply process. The front hopper is responsible for supplying materials, while the rear hopper is responsible for adding new materials. They switch roles after switching, which isolates the material replenishment action from the material retrieval path, reduces the impact of material handling, retrieval, stripping, and positioning actions during the material replenishment process, and improves the stability of continuous material supply.

[0023] 3. Reliable hopper switching and positioning reduces switching errors and the risk of material jamming. The switching is achieved by using a first motor to drive the front and rear hoppers to rotate around a vertical axis, and by using a second induction plate and a third sensor to detect the rotation angle. This enables the detection and control of the switching position, reducing the risk of material deviation, interference, collision or jamming caused by incomplete rotation, and improving the reliability of switching without stopping the machine.

[0024] 4. Stabilize and control the material picking height to improve the success rate of material picking and reduce the probability of picking up multiple sheets / off-center picking. The lifting mechanism lifts the stacked sheets to a set height and moves them smoothly up and down via a synchronous belt lifting structure. This keeps the top of the stack on a relatively constant picking plane, which helps the handling components to pick up materials stably with a smaller Z-axis stroke, improving the success rate of adsorption and cycle stability, and reducing abnormalities such as missed adsorption, biased adsorption, and multiple adsorption sheets.

[0025] 5. The lifting mechanism and the bottom support structure of the silo are staggered to avoid interference during switching and ensure continuity of switching. The first and second support teeth are staggered, and the first support tooth descends to avoid interference when switching hoppers. This effectively prevents interference between the lifting components and the bottom support structure of the hopper, reduces the risk of scratches, jamming, and scattering of sheet material, and structurally ensures the smoothness and safety of the material change process without stopping the machine. Attached Figure Description

[0026] Figure 1 This is a perspective view of the present invention; Figure 2 The three-dimensional representation of the present invention after removing the outer shell. Figure 1 ; Figure 3 The three-dimensional representation of the present invention after removing the outer shell. Figure 2 ; Figure 4 The three-dimensional representation of the present invention after removing the outer shell. Figure 3 ; Figure 5 This is a three-dimensional representation of the hopper assembly of the present invention. Figure 1 ; Figure 6 This is a three-dimensional representation of the hopper assembly of the present invention. Figure 2 ; Figure 7 This is a perspective view of the transport component of the present invention; Figure 8 This is a perspective view of the peeling component of the present invention; Figure 9 The material receiving and positioning platform of the present invention is three-dimensional. Figure 1 ; Figure 10 The material receiving and positioning platform of the present invention is three-dimensional. Figure 2 ; Attached image captions: 1. Frame; 2. Hopper assembly; 3. Front hopper; 4. Rear hopper; 5. Partition; 6. First motor; 7. First vertical slide rail; 8. First slider; 9. First mounting plate; 10. First support tooth; 11. Second support tooth; 12. Second motor; 13. First synchronous belt; 14. First drive wheel; 15. First driven wheel; 16. First clamp; 17. First sensing plate; 18. First sensor; 19. Second sensor; 20. Second sensing plate; 21. Third sensor; 22. Handling assembly; 23. First X-axis assembly; 24. First Z-axis assembly; 25. Suction cup assembly; 26. Peeling assembly; 27. Second mounting plate; 28. First cylinder; 29. ​​Third mounting plate; 30. First clamping plate; 31. Receiving and positioning platform; 32. First platform; 33. First positioning seat; 34. Second cylinder; 35. Third cylinder; 36. Second clamping plate; 37. Third clamping plate. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, and not all of them.

[0028] Combination Figures 1-10 As shown, the present invention provides a non-stop material changing feeder, comprising: The frame 1, and the hopper assembly 2, the conveying assembly 22, the stripping assembly 26 and the receiving and positioning platform 31 installed on the frame 1; The sheet material includes a release liner and a label attached to the release liner; The hopper assembly 2 is used to store stacked sheets and provide the sheets to be picked up to the conveying assembly 22; The conveying assembly 22 is used to convey label sheets between the hopper assembly 2, the peeling assembly 26 and the receiving and positioning platform 31; The peeling component 26 is used to hold the release material so that the conveying component 22 peels the label from the release material when it carries the label away from the peeling component 26. The receiving and positioning platform 31 is used to receive and position the label pieces transported by the handling component 22; The hopper assembly 2 includes a front hopper 3 and a rear hopper 4, which are configured as two feed hoppers that can be switched between each other; when one feed hopper is in the feed position and feeds material to the conveying assembly 22, the other feed hopper is in the replenishment position to replenish the sheet material; The hopper assembly 2 also includes a rotary drive mechanism for driving the front hopper 3 and the rear hopper 4 to rotate around a vertical axis. After the sheet material in the front hopper 3 and the rear hopper 4 is used up at the feeding position, they rotate 180° to exchange the feeding position and the replenishment position. This allows the feeding hopper after rotation to continue feeding and allows the feeding hopper that has rotated to the replenishment position to be replenished, thus achieving material change without stopping the machine.

[0029] The rotary drive mechanism includes a first motor 6, the output shaft of which is vertically arranged; the front hopper 3 and the rear hopper 4 are mounted back-to-back on the output shaft of the first motor 6, and the first motor 6 drives the output shaft to rotate to realize the front and rear switching of the front hopper 3 and the rear hopper 4. The front hopper 3 and the rear hopper 4 are an integral structure and are separated by a partition 5.

[0030] A lifting mechanism is provided on one side of the feeding position. The lifting mechanism is used to lift the stacked sheets in the feeding bin of the feeding position and move them upward to the set picking height. The lifting mechanism includes two parallel first vertical slide rails 7, a first slider 8 that can slide up and down along the first vertical slide rails 7, a first mounting plate 9 mounted on the first slider 8, and a plurality of first support teeth 10 disposed on the first mounting plate 9; the bottom of the front hopper 3 and the rear hopper 4 are each provided with a plurality of second support teeth 11 for supporting stacked sheet materials; the first support teeth 10 and the second support teeth 11 are staggered in the horizontal direction, and the first support teeth 10 can pass through the gaps between the second support teeth 11 in the vertical direction and support the stacked sheet materials when rising to achieve lifting; When the front hopper 3 and the rear hopper 4 rotate 180° to switch, the first support tooth 10 descends below the second support tooth 11 to avoid interference with the second support tooth 11.

[0031] The lifting mechanism further includes a second motor 12, a first synchronous belt 13, a first driving pulley 14, and a first driven pulley 15; the first synchronous belt 13 is wound between the first driving pulley 14 and the first driven pulley 15, and the first driving pulley 14 is mounted on the output shaft of the second motor 12; the first slider 8 is fixed to the first synchronous belt 13 by a first clamp 16, and the second motor 12 drives the first synchronous belt 13 to circulate so as to drive the first slider 8 and the first support tooth 10 to move up and down along the first vertical slide rail 7.

[0032] A first sensing plate 17 is mounted on the first clamp 16; a first sensor 18 and a second sensor 19 are arranged along the up and down movement path of the first sensing plate 17 to detect the upper and lower limit positions of the first slider 8 and to position the first support tooth 10, and the first sensor 18 is arranged above the second sensor 19. A second sensing plate 20 is provided on the output shaft of the first motor 6, and a third sensor 21 is provided along the rotation path of the second sensing plate 20 to detect the rotation angle of the output shaft of the first motor 6 and to control the switching of the front hopper 3 and the rear hopper 4 into position.

[0033] The conveying assembly 22 includes a first X-axis assembly 23, a first Z-axis assembly 24, and a suction cup assembly 25; the first Z-axis assembly 24 is mounted on the first X-axis assembly 23 and can move horizontally with the first X-axis assembly 23, and the suction cup assembly 25 is mounted on the first Z-axis assembly 24 and can move vertically with the first Z-axis assembly 24; the suction cup assembly 25 is provided with a plurality of suction cups for adsorbing the label.

[0034] The peeling assembly 26 includes a second mounting plate 27, a first cylinder 28, a third mounting plate 29, and a first clamping plate 30. The first cylinder 28 is mounted on the second mounting plate 27 with its output shaft vertically oriented, and the third mounting plate 29 is mounted on the output shaft of the first cylinder 28. The first clamping plate 30 is vertically mounted on the third mounting plate 29 and faces the second mounting plate 27. The first cylinder 28 drives the first clamping plate 30 to move closer to or further away from the second mounting plate 27, so that the first clamping plate 30 clamps or releases the release liner between the second mounting plate 27 and the first mounting plate 27, thereby peeling the label from the release liner when the conveying assembly 22 adsorbs and pulls away the label.

[0035] The receiving and positioning platform 31 includes a first platform 32, a first positioning seat 33 installed on the upper side of the first platform 32, a second cylinder 34, a third cylinder 35, a second clamping plate 36, and a third clamping plate 37. The first positioning seat 33 is used to position and place the label piece; A first through slot and a second through slot are respectively opened on the first platform 32 on the adjacent sides of the first positioning seat 33; the second cylinder 34 and the third cylinder 35 are installed on the lower side of the first platform 32, the output shaft of the second cylinder 34 is parallel to the short side of the first positioning seat 33, and the output shaft of the third cylinder 35 is parallel to the long side of the first positioning seat 33; the second clamping plate 36 is installed on the output shaft of the second cylinder 34 and extends upward through the first through slot, and the third clamping plate 37 is installed on the output shaft of the third cylinder 35 and extends upward through the second through slot; the second cylinder 34 is used to drive the second clamping plate 36 to move relative to the first positioning seat 33 to change the distance between the second clamping plate 36 and the long side of the first positioning seat 33, and the third cylinder 35 is used to drive the third clamping plate 37 to move relative to the first positioning seat 33 to change the distance between the third clamping plate 37 and the short side of the first positioning seat 33, thereby forming an adjustable positioning frame to adapt to the label pieces of different sizes.

[0036] It also includes a controller and a memory. The memory stores a control program that can be executed by the controller. The controller is electrically connected to the first motor 6, the second motor 12, and the conveying assembly 22. When the control program is executed, it controls the lifting mechanism to lift the sheet material in the rear material hopper 4 to a preset picking height when the rear material hopper 4 is in the replenishment position, and controls the conveying assembly 22 to perform a trial suction action on the sheet material at the top of the rear material hopper 4, so as to determine the feeding readiness state of the rear material hopper 4 based on whether the vacuum degree of the suction cup assembly 25 reaches a preset threshold during the trial suction process; when the feeding readiness state is satisfied and the switching window conditions are met, it controls the first motor 6 to drive the front material hopper 3 and the rear material hopper 4 to rotate 180° to complete the feeding hopper switching, wherein the switching window conditions include: the suction cup assembly 25 is at a preset safe height and away from the interference area between the peeling assembly 26 and the receiving positioning platform 31, the peeling assembly 26 is in the state of releasing the release material, and the receiving positioning platform 31 is in the state of allowing material release.

[0037] It also includes a vision inspection component and an image processing module. The vision inspection component includes a camera and a light source. The camera is set at one of the material picking position, peeling position, and receiving positioning platform 31 to acquire images of the label sheet. The image processing module is used to identify the images to output the offset and defect type of the label sheet. The controller controls the conveying component 22 to compensate for the picking and placing position and controls the peeling parameters of the peeling component 26 to adjust according to the offset and defect type. The compensation includes compensation for the picking and placing position of the first X-axis component 23 and compensation for the material placement height of the first Z-axis component 24. The peeling parameters include at least peeling speed and clamping force on the release material.

[0038] Example 1: This embodiment provides a non-stop material changing feeder, which is suitable for continuously peeling off the label sheet from the sheet material with release liner and transporting it to the receiving and positioning platform 31, so as to realize continuous feeding and non-stop material changing.

[0039] 1. Overall Structure The non-stop material changing feeder includes a frame 1, and a hopper assembly 2, a conveying assembly 22, a peeling assembly 26, and a receiving and positioning platform 31 mounted on the frame 1. The sheet material consists of a release liner and a label attached to the release liner.

[0040] Material hopper assembly 2: includes a front material hopper 3 and a rear material hopper 4, used to store stacked sheet materials. The front material hopper 3 is in the feeding position to feed materials to the handling assembly 22, and the rear material hopper 4 is in the replenishing position for manual or upper-level equipment to replenish sheet materials.

[0041] The front hopper 3 and the rear hopper 4 are mounted back-to-back on the output shaft of the first motor 6, with the output shaft of the first motor 6 facing vertically upwards. The first motor 6 drives the front hopper 3 and the rear hopper 4 to rotate around the vertical axis to achieve the switching between the front and rear hoppers. The front hopper 3 and the rear hopper 4 can be structurally integrated, separated by a partition 5, which is used to separate the stacking space of the sheet materials on both sides.

[0042] Lifting mechanism: Located next to the feeding position (i.e. the hopper currently being fed), it is used to lift the stacked sheets in the hopper to the set picking height.

[0043] The lifting mechanism includes two parallel vertical slide rails 7, a first slider 8, a first mounting plate 9, and several first support teeth 10. The first slider 8 can slide up and down along the first vertical slide rails 7, the first mounting plate 9 is mounted on the first slider 8, and the first support teeth 10 are disposed on the first mounting plate 9.

[0044] Several second support teeth 11 are provided at the bottom of both the front hopper 3 and the rear hopper 4 to support the stacked sheet materials. The first support teeth 10 and the second support teeth 11 are arranged alternately in the horizontal direction. The first support teeth 10 can pass through the second support teeth 11 from bottom to top and support the stacked sheet materials.

[0045] The lifting mechanism adopts a structure of second motor 12 + first synchronous belt 13: the first synchronous belt 13 is wound around the first driving wheel 14 and the first driven wheel 15. The first driving wheel 14 is mounted on the output shaft of the second motor 12. The first slider 8 is fixed on the first synchronous belt 13 by the first clamp 16. The second motor 12 drives the first synchronous belt 13 to circulate, thereby driving the first slider 8 and the first support tooth 10 to move up and down.

[0046] Lifting and material changing positioning detection: The first sensor 17 is installed on the first clamp 16. The first sensor 18 and the second sensor 19 are set on the up and down movement path of the first sensor 17 to detect the position of the first sensor 17 and realize the upper and lower limit and positioning control of the first slider 8 (and the first support tooth 10). The first sensor 18 is located above the second sensor 19.

[0047] A second sensing plate 20 is installed on the output shaft of the first motor 6, and a third sensor 21 is installed on the rotation path of the second sensing plate 20 to sense the rotation angle of the output shaft so as to control the front hopper 3 and the rear hopper 4 to rotate into position (e.g., switch to position 180°).

[0048] The conveying assembly 22 includes a first X-axis assembly 23, a first Z-axis assembly 24, and a suction cup assembly 25. The first Z-axis assembly 24 is mounted on the first X-axis assembly 23 to achieve horizontal movement and positioning, and the suction cup assembly 25 is mounted on the first Z-axis assembly 24 to achieve vertical lifting. The suction cup assembly 25 is equipped with several suction cups for adsorbing and conveying labels.

[0049] Peeling assembly 26 includes a second mounting plate 27, a first cylinder 28, a third mounting plate 29, and a first clamping plate 30. The first cylinder 28 is mounted on the second mounting plate 27 with its output shaft facing upwards. The third mounting plate 29 is mounted on the output shaft of the first cylinder 28. The first clamping plate 30 is vertically mounted on the side of the third mounting plate 29 facing the second mounting plate 27. The first cylinder 28 drives the first clamping plate 30 to move closer to or further away from the upper edge of the second mounting plate 27 to clamp or release the release liner, thereby cooperating with the handling assembly 22 to peel the label from the release liner.

[0050] The receiving and positioning platform 31 includes a first platform 32, a first positioning seat 33, a second cylinder 34, a third cylinder 35, a second clamping plate 36, and a third clamping plate 37. The first positioning seat 33 is mounted on the upper side of the first platform 32, and through slots are respectively provided on one long side and one short side of the first positioning seat 33 on the first platform 32. The second cylinder 34 and the third cylinder 35 are mounted on the lower side of the first platform 32. The output shaft of the second cylinder 34 is parallel to the short side of the first positioning seat 33, and the output shaft of the third cylinder 35 is parallel to the long side of the first positioning seat 33. The second clamping plate 36 is mounted on the output shaft of the second cylinder 34 and extends upward through a corresponding through slot, and the third clamping plate 37 is mounted on the output shaft of the third cylinder 35 and extends upward through another through slot. The second cylinder 34 and the third cylinder 35 drive the second clamping plate 36 and the third clamping plate 37 to adjust the size of the positioning frame, thereby adapting to label sheets of different sizes.

[0051] 2. Working process (continuous feeding, stripping and receiving positioning) (1) Feeding and lifting constant height: When the front hopper 3 is in the feeding position, the lifting mechanism drives the first lifting tooth 10 to rise under the drive of the second motor 12. The first lifting tooth 10 and the second lifting tooth 11 work together to lift the stacked sheet material as a whole and move it upward so that the top sheet material to be picked up is within the preset picking height range. When the set height is reached, the first sensing plate 17 triggers the first sensor 18 or the second sensor 19 to achieve lifting positioning and limit, ensuring that the picking height is stable.

[0052] (2) Material picking and handling: The handling component 22 moves to the position above the feeding position via the first X-axis component 23, and the first Z-axis component 24 drives the suction cup component 25 to move down close to the top sheet. After the suction cup component 25 adsorbs the label sheet (or the predetermined position area in the adsorbed sheet), it rises and moves to the corresponding station of the peeling component 26 under the drive of the first X-axis component 23.

[0053] (3) Clamping and peeling: At the peeling station, the first cylinder 28 drives the first clamping plate 30 to approach the upper edge of the second mounting plate 27 to clamp and fix the release material. Then the conveying component 22 continues to use the suction cup to maintain the adsorption of the label and pull it away along the predetermined path, so that the label and the release material are peeled off relative to each other. The label is taken away by the conveying component 22, and the release material is clamped by the peeling component 26 and left at the peeling station. After peeling is completed, the first cylinder 28 drives the first clamping plate 30 away from the second mounting plate 27 to release the release material, so that the release material can be collected or enter subsequent processing.

[0054] (4) Receiving and positioning and size adaptation: The conveying component 22 moves the label sheet above the receiving and positioning platform 31 and lowers it. According to the size requirements of the label sheet, the second cylinder 34 drives the second clamping plate 36 to adjust its distance from the long side of the first positioning seat 33, and the third cylinder 35 drives the third clamping plate 37 to adjust its distance from the short side of the first positioning seat 33, thereby forming an adjustable positioning frame that matches the label sheet; after the conveying component 22 releases the vacuum, the label sheet falls into the positioning frame and is constrained by it, achieving stable positioning.

[0055] (5) Cyclic operation: The above-mentioned lifting, material handling, stripping and receiving positioning actions are performed in a cycle. The lifting mechanism continuously compensates for height as the sheet material gradually decreases in order to maintain stable material handling height, thereby improving the success rate of continuous material handling and cycle stability.

[0056] 3. Non-stop material change process (switching between front and rear hoppers) When the current material bin 3 is nearly depleted, the rear material bin 4 can continuously replenish material at the replenishment position without affecting the feeding operation. After the current material bin 3 is depleted, the lifting mechanism controls the first lifting tooth 10 to descend below the second lifting tooth 11 to avoid interference; then the first motor 6 drives the front material bin 3 and the rear material bin 4 to rotate 180°. The rotation angle is detected by the second sensing plate 20 and the third sensor 21 to realize the switching to position control, so that the rear material bin 4 switches to the feeding position and continues to feed material, and the original front material bin 3 switches to the replenishment position and can be replenished immediately, thereby realizing material change without stopping the machine and continuous production.

[0057] Example 2: This embodiment, based on the structure of Embodiment 1, further introduces a non-stop switching logic with a controller and pre-synchronous trial suction, as well as visual inspection and closed-loop compensation, making the non-stop material changing process more controllable and improving the yield and consistency of peeling and material placement. The following description uses "label sheet" as the object being transported and "release material" as the object being clamped.

[0058] I. Structural Composition and Installation Relationship 1. Control Unit The controller and memory (which can be a PLC + motion control module or an industrial PC) are installed on rack 1. The controller is connected to: First motor 6 (hopper rotation) Second motor 12 (lifting synchronous belt) First X-axis assembly 23, first Z-axis assembly 24 (transfer motion) Cylinder 28 (peeling and clamping) Second cylinder 34, third cylinder 35 (adjustment of material receiving and positioning platform) First sensor 18, second sensor 19, third sensor 21 (position / angle detection) Electrical connection and linkage control.

[0059] 2. Vacuum and Detection (used for test suction and gripping reliability assessment) The suction cup assembly 25 is connected to a vacuum generator or vacuum pump, and a vacuum pressure sensor (e.g., a negative pressure sensor with a detection range of 0 to -100 kPa and a sampling frequency of ≥50 Hz) is set on the suction cup circuit. The controller reads the data for: The test suction determined that "feeding is ready"; During the material handling / peeling process, detect abnormalities such as missed suction or suction of multiple sheets.

[0060] 3. Visual inspection components and image processing module The visual inspection component includes a camera and a light source; this embodiment employs a "two-station vision" approach to enhance reproducibility. The first camera is set above the material picking position (aligned with the material picking area of ​​the material hopper at the feeding position), equipped with a ring or strip coaxial light source, and is used to detect the outer boundary, center position and rotation angle of the top label. The second camera is positioned above the receiving and positioning platform 31 (aligned with the area of ​​the first positioning seat 33), equipped with a surface light source, and is used to detect the offset and defects after the material is dropped.

[0061] The image processing module can be integrated into the controller or a standalone industrial computer to output offsets Δx, Δy and angle deviations Δθ, as well as defect types (missing pieces, skew, warped edges, bubbles / wrinkles, etc.).

[0062] 4. Key Geometry and Parameter Examples (Recommended Values ​​for Implementation) Material picking preset height: Based on the surface of the top label after lifting, the material picking height error is set to ≤ ±0.3mm; Number of suction cups: 4 to 8 (6 in this embodiment), diameter of a single suction cup: 10 to 20 mm (Ø12 mm in this embodiment); Test vacuum threshold: A vacuum level of ≤-55kPa and maintained for ≥80ms is considered a "successful test"; the test time window is 120~200ms (150ms in this embodiment); X-axis speed: 300~800mm / s (500mm / s in this embodiment), Z-axis speed: 100~300mm / s (200mm / s in this embodiment); The air supply pressure for the peeling clamping cylinder is 0.35–0.60 MPa (0.45 MPa in this embodiment). Peeling speed: 50-150 mm / s (90 mm / s in this embodiment); Safety height Zsafe: The height at which the suction cup assembly 25 does not interfere with the hopper, the peeling assembly 26, and the receiving and positioning platform 31 (in this embodiment, Zsafe is set to ≥ 80 mm).

[0063] II. Control Logic and Procedures To achieve material change without shutting down the machine and to avoid interference, this embodiment divides the silo operation into two roles: ACTIVE bin: It is in the feeding position and is feeding (initially the front bin 3); STANDBY hopper: In the replenishment position and allows replenishment and pre-synchronization (initially the rear hopper 4).

[0064] The controller operates using a state machine (ACTIVE feeding / pre-synchronization / switching / abnormal handling) and uses sensors and vacuum signals as interlocking conditions.

[0065] S1: Initialization and Calibration 1. The controller drives the first X-axis assembly 23 and the first Z-axis assembly 24 back to zero; 2. The lifting mechanism descends to the lower limit (triggered by the second sensor 19); 3. The first motor 6 rotates to the reference angle of "feeding position of front hopper 3" (the third sensor 21 identifies that the second sensing plate 20 is in place); 4. Visual calibration: Establish the transformation from camera pixel coordinates to motion coordinates (2D affine or hand-eye calibration matrix) and store it in memory.

[0066] S2: ACTIVE Warehouse Constant High Lifting (Closed-Loop Material Supply) 1. Read the status of the first sensor 18 and the second sensor 19, and control the second motor 12 to drive the synchronous belt, so that the first support tooth 10 rises to lift the sheet material; 2. The upper limit positioning point is set by "the first sensing element 17 triggers the first sensor 18", and the lower limit positioning point is set by "the second sensor 19 is triggered"; 3. When a material picking height deviation is detected (which can be inferred by counting the lifting stroke or the Z compensation amount of the previous material picking), fine-tune the lifting: adjust by 0.2 to 0.5 mm each time until the top sheet is within the preset material picking height range.

[0067] S3: Visual inspection and material handling position compensation at the material handling station 1. The first camera captures images of the material handling area; 2. The image processing module performs threshold segmentation and contour fitting / template matching on the label edges to obtain the label center point and orientation angle; 3. Output the material pick-up offsets Δx_pick, Δy_pick, and Δθ_pick; 4. The controller compensates for the target position of the first X-axis component 23 based on Δx_pick, Δy_pick, and Δθ_pick, and performs rotation compensation for the landing posture (if allowed) or landing trajectory of the suction cup component 25; compensation limits: |Δx|≤2.0mm, |Δy|≤2.0mm, |Δθ|≤2° (if the limits are exceeded, it is judged as abnormal and enters S9).

[0068] S4: Transport the component, pick up the wafer, and send it to the stripping station. 1. The first X-axis assembly 23 moves to the compensated material-picking coordinates; the first Z-axis assembly 24 descends to the material-picking height; 2. Open the vacuum. If the vacuum level reaches ≤-55kPa within 150ms, the grab is considered successful; otherwise, perform a retry (raise 2mm and then lower). If it still fails, alarm and stop the machine or switch to the backup strategy (S9). 3. The first Z-axis assembly 24 rises to Zsafe, and the first X-axis assembly 23 moves above the stripping assembly 26.

[0069] S5: The peeling component holds the release liner and completes the label peeling. 1. Position the sheet material (including the release liner) into the clamping area of ​​the peeling component 26; 2. Control the first cylinder 28 to make the first clamping plate 30 and the second mounting plate 27 clamp the release material (clamping pressure 0.45MPa); 3. The conveying component 22 maintains the adsorption of the label and pulls it away along the preset peeling direction to form a peel; the peeling speed is 90 mm / s; 4. If the vacuum level suddenly drops (e.g., >40kPa) or a tendency to curl or string is detected visually during the peeling process, the controller will adjust the peeling parameters in real time: Reduce the peeling speed (e.g., from 90 to 60 mm / s); and Increase the clamping pressure (e.g., from 0.45 to 0.55 MPa).

[0070] 5. After peeling is completed, the first cylinder 28 releases the release material; the transport component 22 carries the label into the receiving and positioning platform 31.

[0071] S6: Material receiving and positioning platform size adjustment and material feeding 1. According to the order parameters or the pre-set label size, control the second cylinder 34 and the third cylinder 35 to adjust the position of the second clamping plate 36 and the third clamping plate 37 so that the inner dimension of the positioning frame = the outer dimension of the label + 0.2~0.5mm gap (in this embodiment, it is +0.3mm). 2. The conveying component 22 moves to the unloading coordinate, the Z-axis descends to the unloading height (0.2-0.5mm gap with the platform), the vacuum is turned off and a short backflushing for 20-50ms can be performed to ensure release; 3. The Z-axis is raised to Zsafe.

[0072] S7: Visual inspection and closed-loop compensation at the material receiving station 1. The second camera acquires images of the material receiving and positioning platform 31; 2. The image processing module outputs the blanking offset Δx_place, Δy_place, Δθ_place and the defect type (missing piece, skew, warping, air bubbles, etc.). 3. The controller executes the closed-loop strategy: If only a small offset exists (|Δx_place|≤0.5mm and |Δy_place|≤0.5mm and |Δθ_place|≤1°), record it and use it for fine-tuning the feeding coordinates in the next cycle; If the offset exceeds the limit but can be corrected (e.g., ≤2mm), "secondary correction placement" is allowed within this cycle: the handling component 22 picks up the label again, corrects it according to the compensation amount, and then places it again; If the defect is determined to be uncorrectable (such as missing piece, severe edge warping / damage), the label is moved to the scrap position (if the production line allows) and the defect code is recorded. At the same time, the peeling parameters are automatically adjusted (reducing speed / increasing clamping force / increasing pressing dwell time, etc.).

[0073] III. Implementation Process of "Pre-synchronous Trial Suction + Switching Window" for Material Change Without Shutdown When the remaining quantity in the ACTIVE bin is below a threshold (which can be inferred from the material count or bin height, for example, ≤10 sheets remaining), the controller initiates STANDBY bin pre-synchronization without affecting the continued material supply to the ACTIVE bin.

[0074] S8: STANDBY Warehouse Pre-synchronization and Material Readiness Judgment (Trial Suction) Execute when the STANDBY warehouse is in the replenishment position: 1. Control the lifting mechanism to pre-lift the STANDBY bin: lift the top sheet of the STANDBY bin to the same preset material picking height as the ACTIVE bin (allowable error ±0.3mm). 2. Control the transport component 22 to move above the STANDBY bin picking area, and lower the Z-axis to the "test suction height" (0.2mm higher than the normal picking height to avoid taking away the sheet material); 3. After 150ms of vacuum activation, determine whether the vacuum level reaches ≤-55kPa and remains at ≥80ms: If the following conditions are met: the STANDBY warehouse is deemed "ready for material supply"; If the requirements are not met: prompt for replenishment or reorganization of the sheet stack, and retry periodically without affecting the ACTIVE feed (e.g., retry every 30 seconds).

[0075] 4. After the test suction is completed, turn off the vacuum and rise to Zsafe to ensure that no flakes are taken away.

[0076] S9: Window switching condition determination (interlocking to avoid interference) When the "STANDBY feed ready" condition is met and the ACTIVE bin is depleted / about to be depleted, the controller will only allow the first motor 6 to rotate if all of the following switching window conditions are met: 1. The suction cup assembly 25 is within Zsafe ≥ 80mm; 2. The first X-axis assembly 23 is located in the parking area (away from the rotating sweeping area of ​​the hopper, for example, ≥150mm from the center of the hopper's rotating axis). 3. The peeling component 26 is in the released state (the first clamping plate 30 is away from the second mounting plate 27 and does not clamp the release material); 4. The material receiving and positioning platform 31 is in the state where material can be released (the second clamping plate 36 and the third clamping plate 37 are kept in the working position and do not extend into the rotating sweeping area of ​​the hopper).

[0077] S10: Perform switching (180° rotation) and resume feeding. 1. Control the descent of the lifting mechanism: The first lifting tooth 10 descends to below the second lifting tooth 11 (confirmed by the second sensor 19) to avoid interference between the lifting tooth and the bottom structure of the hopper; 2. Control the first motor 6 to rotate 180° to complete the ACTIVE / STANDBY switch; the third sensor 21 detects the second sensing element 20 in place as a signal that the switch is complete; 3. After the switch is complete: Update state machine: Original STANDBY store → ACTIVE store; Original ACTIVE store → STANDBY store; Perform a "visual confirmation of the picking position" (S3) and necessary lifting fine-tuning (S2) on the new ACTIVE warehouse, and then enter the normal feeding cycle (S4~S7). The original STANDBY (i.e., the hopper rotated to the replenishment position) allows for immediate replenishment, realizing a closed-loop material change without stopping the machine.

[0078] IV. Anomaly and Protection Strategies (Ensure they are "clear and implementable") 1. Trial suction failure: prompts for replenishment / organization; if there are N consecutive failures (e.g., N=5), switching will be prohibited and an alarm will be triggered, but this will not affect the current ACTIVE from continuing to supply material until it is exhausted.

[0079] 2. Missing or multiple sheets picked up: Determine the issue based on the vacuum curve (e.g., vacuum rise is too slow or abnormally high / low), and perform a retry; if the problem persists, proceed to manual handling or speed reduction mode.

[0080] 3. Poor peeling (curling / fragmentation / backing paper): Trigger adaptive adjustment: reduce peeling speed, increase clamping pressure, and increase peeling start dwell time (e.g., 80-150ms).

[0081] 4. Material offset exceeds the limit: Secondary correction is allowed; if it still exceeds the limit, it will be treated as a defective product and the error will be recorded in the log.

[0082] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the inventive concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the protection scope of the present invention.

Claims

1. A feeder for changing sheet metal without stopping the machine, characterized in that, include: A frame, and a hopper assembly, a conveying assembly, a stripping assembly, and a receiving and positioning platform mounted on the frame; The sheet material includes a release liner and a label attached to the release liner; The hopper assembly is used to store stacked sheets and to provide the sheets to be picked up to the conveying assembly; The conveying assembly is used to move the label pieces between the hopper assembly, the peeling assembly, and the receiving and positioning platform; The peeling component is used to hold the release liner so that the transport component peels the label off the release liner when it carries the label away from the peeling component; The receiving and positioning platform is used to receive and position the label pieces transported by the handling components; The hopper assembly includes a front hopper and a rear hopper, which are configured as two interchangeable feeding hoppers; when one feeding hopper is in the feeding position and feeding the conveying assembly, the other feeding hopper is in the replenishing position to replenish the sheet material; The hopper assembly also includes a rotary drive mechanism for driving the front hopper and the rear hopper to rotate around a vertical axis. After the sheet material in the front hopper and the rear hopper is used up at the feeding position, they rotate 180° to exchange the feeding position and the replenishment position. This allows the feeding hopper to continue feeding after the rotation and allows the feeding hopper that has rotated to the replenishment position to be replenished, thus achieving material change without stopping the machine.

2. The non-stop material changing feeder according to claim 1, characterized in that, The rotary drive mechanism includes a first motor, the output shaft of which is vertically arranged; the front hopper and the rear hopper are mounted back-to-back on the output shaft of the first motor, and the first motor drives the output shaft to rotate to realize the front and rear switching of the front hopper and the rear hopper; The front hopper and the rear hopper are an integral structure and are separated by a partition.

3. The non-stop material changing feeder according to claim 2, characterized in that, A lifting mechanism is provided on one side of the feeding position. The lifting mechanism is used to lift the stacked sheets in the feeding bin of the feeding position and move them upward to the set picking height. The lifting mechanism includes two parallel first vertical slide rails, a first slider that can slide up and down along the first vertical slide rails, a first mounting plate mounted on the first slider, and a plurality of first support teeth disposed on the first mounting plate; the bottom of both the front hopper and the rear hopper is provided with a plurality of second support teeth for supporting the stacked sheet material; the first support teeth and the second support teeth are staggered in the horizontal direction, and the first support teeth can pass through the gaps between the second support teeth in the vertical direction and support the stacked sheet material when rising to achieve lifting; When the front hopper and the rear hopper rotate 180° to switch, the first support tooth descends below the second support tooth to avoid interference with the second support tooth.

4. The non-stop material changing feeder according to claim 3, characterized in that, The lifting mechanism further includes a second motor, a first synchronous belt, a first driving wheel, and a first driven wheel; the first synchronous belt is wound between the first driving wheel and the first driven wheel, and the first driving wheel is mounted on the output shaft of the second motor; the first slider is fixed to the first synchronous belt by a first clamp, and the second motor drives the first synchronous belt to circulate so as to drive the first slider and the first support tooth to move up and down along the first vertical slide rail.

5. The non-stop material changing feeder according to claim 4, characterized in that, The first clamp is equipped with a first sensing plate; a first sensor and a second sensor are arranged along the up and down movement path of the first sensing plate to detect the upper and lower limit positions of the first slider and to position the first support tooth, and the first sensor is arranged above the second sensor. A second sensing plate is provided on the output shaft of the first motor, and a third sensor is provided along the rotation path of the second sensing plate to detect the rotation angle of the output shaft of the first motor and to control the switching of the front hopper and the rear hopper into position.

6. The non-stop material changing feeder according to claim 4, characterized in that, The conveying assembly includes a first X-axis assembly, a first Z-axis assembly, and a suction cup assembly; the first Z-axis assembly is mounted on the first X-axis assembly and can move horizontally with the first X-axis assembly, and the suction cup assembly is mounted on the first Z-axis assembly and can move vertically with the first Z-axis assembly; the suction cup assembly is provided with a plurality of suction cups for adsorbing the label.

7. The non-stop material changing feeder according to claim 1, characterized in that, The peeling assembly includes a second mounting plate, a first cylinder, a third mounting plate, and a first clamping plate; the first cylinder is mounted on the second mounting plate with its output shaft vertically oriented, and the third mounting plate is mounted on the output shaft of the first cylinder; the first clamping plate is vertically mounted on the third mounting plate and faces the second mounting plate; the first cylinder drives the first clamping plate to move closer to or away from the second mounting plate, so that the first clamping plate clamps or releases the release liner between the second mounting plate, thereby peeling the label from the release liner when the conveying assembly adsorbs and pulls away the label.

8. The non-stop material changing feeder according to claim 1, characterized in that, The material receiving and positioning platform includes a first platform, a first positioning seat installed on the upper part of the first platform, a second cylinder, a third cylinder, a second clamping plate, and a third clamping plate; The first positioning seat is used to position and place the label piece. A first through slot and a second through slot are respectively opened on the two adjacent sides of the first positioning seat on the first platform; the second cylinder and the third cylinder are installed on the lower side of the first platform, the output shaft of the second cylinder is parallel to the short side of the first positioning seat, and the output shaft of the third cylinder is parallel to the long side of the first positioning seat; the second clamping plate is installed on the output shaft of the second cylinder and extends upward through the first through slot, and the third clamping plate is installed on the output shaft of the third cylinder and extends upward through the second through slot; the second cylinder is used to drive the second clamping plate to move relative to the first positioning seat to change the distance between the second clamping plate and the long side of the first positioning seat, and the third cylinder is used to drive the third clamping plate to move relative to the first positioning seat to change the distance between the third clamping plate and the short side of the first positioning seat, thereby forming an adjustable positioning frame to adapt to the label pieces of different sizes.

9. The non-stop material changing feeder according to claim 6, characterized in that, It also includes a controller and a memory. The memory stores a control program that can be executed by the controller. The controller is electrically connected to the first motor, the second motor, and the conveying assembly. When the control program is executed, it is used to: when the rear hopper is in the replenishment position, control the lifting mechanism to lift the sheet material in the rear hopper to a preset picking height and control the conveying assembly to perform a trial suction action on the sheet material at the top of the rear hopper, so as to determine the feeding readiness state of the rear hopper based on whether the vacuum degree of the suction cup assembly reaches a preset threshold during the trial suction process; when the feeding readiness state is satisfied and the switching window conditions are met, control the first motor to drive the front hopper and the rear hopper to rotate 180° to complete the feeding hopper switching, wherein the switching window conditions include: the suction cup assembly is at a preset safety height and away from the interference area between the peeling assembly and the receiving positioning platform; the peeling assembly is in the state of releasing the release material; and the receiving positioning platform is in the state of allowing material release.

10. The non-stop material changing feeder according to claim 9, characterized in that, It also includes a vision inspection component and an image processing module. The vision inspection component includes a camera and a light source. The camera is positioned at one of the material picking position, the peeling position, and the receiving positioning platform to acquire images of the label sheet. The image processing module is used to identify the images to output the offset and defect type of the label sheet. The controller controls the conveying component to compensate for the picking and placing position and controls the peeling parameters of the peeling component to adjust according to the offset and defect type. The compensation includes compensation for the picking and placing position of the first X-axis component and compensation for the material placement height of the first Z-axis component. The peeling parameters include at least the peeling speed and the clamping force on the release material.

Images