Accurate removing device for bag making machine

Abstract

The invention discloses an accurate rejecting device for a bag making machine, which comprises a control element, a detection assembly arranged above a feeding device, a buffer rack arranged between a turnover material turning device and an edge sealing device, a plurality of conveying rollers arranged on the buffer rack along a material conveying path, and a buffer rack rotatably mounted on the buffer rack, a stroke feedback element used for detecting the overturning stroke of the buffer frame is installed on a rotating shaft of the buffer rack, and the stroke feedback element, the detection assembly and the control element are in signal connection. The detection assembly is arranged on the feeding section, the rotation angle of the buffer frame is detected in real time, the self-adaptive rotation angle of the buffer frame in the material conveying process is obtained, and compensation calculation can be conducted on the length of materials conveyed between the detection assembly and the removing device according to the rotation angle of the buffer frame; according to the material detection device, the position detected by the detection assembly is ensured to be consistent with the cutting position of the removing device, the comprehensiveness of material detection is ensured, meanwhile, errors caused by conveying are reduced, waste caused in the removing process is reduced, and the cost is saved.

Description

Technical Field

[0001] The invention belongs to the technical field of bag making machines, and in particular relates to a precise rejecting device for bag making machines. Background Art

[0002] At present, our company's bag-making machine has a full inspection on both sides, and most of the defects of printed products can be detected. Bag-making machine is the final production equipment of bag products (the final product is the bag-making machine), and bag-making is also the final production process of the packaging color printing factory, so the full inspection and final inspection of this link is the focus of all printing inspections, because it is the final inspection, and it is in a separated state, so accurate rejection is the top priority.

[0003] At present, the application of online inspection on bag-making machines at home and abroad is basically blank, so there is no demand for high-precision positioning of defective positions. Some existing manufacturers have achieved partial inspection and rejection on bag-making machines, but they have many problems: most of the definitions of inspection and rejection refer to joint positioning and rejection; a small number of manufacturers can do some simple single-sided positioning and a small number of regional inspections, but in order to avoid errors, their inspection stations are often very close to the rejection stations, and there is actually little demand for high-precision positioning and rejection. The objects of their inspection are finished or semi-finished bags, and the inspection range is very small. Most problems cannot actually be detected, and the significance of positioning and rejection is limited; manual intervention and screening are often required.

[0004] In some existing bag-making machines, the detection station is often set in an area far away from the rejection station, such as in the feeding section. However, one or more floating structures are often set in the machine, and the distance between detection and rejection is often variable in real time, resulting in the inability to always accurately reject.

[0005] In addition, in order to facilitate the adjustment and transportation of the existing bag-making machine, the bag-making machine is often designed as a split structure, consisting of a feeding device, a turning and bending device, an edge sealing device and a cutting device. Each device can be moved and adjusted accordingly. However, once the corresponding device is actively adjusted or accidentally bumped and moved, if it is not corrected in time, it will affect the position of the defective products rejected by the rejection station and the defective products detected by the inspection station, resulting in errors, affecting the accuracy of rejection, resulting in a lot of waste in rejection, and greatly increasing production costs. Summary of the invention

[0006] In order to overcome the deficiencies of the prior art, the present invention provides a precise rejection device for a bag making machine which has comprehensive detection, reduces errors, improves rejection accuracy and reduces waste of genuine products.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a precise rejection device for a bag making machine is installed on the bag making machine, and the bag making machine is composed of a feeding device, a turning and bending device, an edge sealing device and a rejection device, including a control element, a detection component is provided above the feeding device, a buffer frame is provided between the turning and bending device and the edge sealing device, the buffer frame is provided with a plurality of conveying rollers along the material conveying path, and a buffer frame is rotatably mounted thereon, and a stroke feedback element for detecting the turning stroke of the buffer frame is installed on the rotating shaft of the buffer frame, and the stroke feedback element and the detection component are connected with the control element by signal; by arranging the detection component in the feeding section and detecting the turning stroke of the buffer frame in real time, the adaptive turning stroke of the buffer frame during the material conveying process is obtained, and the length of the material conveyed between the detection component and the rejection device can be compensated and calculated according to the turning stroke of the buffer frame, so as to ensure that the position detected by the detection component is consistent with the position rejected by the rejection device, and to ensure the comprehensiveness of the material detection while reducing the error caused by the conveying, ensuring the rejection accuracy, reducing the waste of genuine products, and reducing the cost.

[0008] Preferably, the travel feedback element is any one of a rotary encoder, a photoelectric encoder, a magnetic encoder, a wire encoder, a laser ranging sensor, and an ultrasonic ranging sensor.

[0009] Preferably, a rotating rod is fixedly connected to one end of the rotating shaft of the buffer rack, a lever is provided at one end of the rotating rod, an extreme position feedback element is provided on the side wall of the buffer rack, a bar ring is provided on the detection end of the extreme position feedback element, the lever is inserted into the bar ring, the extreme position feedback element is connected with the control element signal, when the buffer rack rotates abnormally and its forward or reverse rotation angle reaches a certain extreme angle, the lever will move the bar ring to trigger the extreme position feedback element to feedback the abnormal situation; through the extreme position feedback element, the extreme rotation stroke of the buffer rack can be detected to ensure that the material is transported within the normal range and to ensure the normal production of the bag making machine.

[0010] Preferably, a floating frame is rotatably connected to the feeding device, and a stroke feedback element is also installed on the rotating shaft of the floating frame; by arranging a floating frame in the feeding section, the feeding of materials can be buffered and guided, and by monitoring and feedback of the stroke of the floating frame, the error compensation of the material feeding length of the feeding section is performed, so that the control element can more accurately calculate the subsequent material conveying length.

[0011] Preferably, the detection component is provided between the feeding device and the turning and bending device; by arranging the position of the detection component after the feeding device and floatingly mounting it in front of the detection component, the influence of the error of the feeding section on the subsequent conveying error can be reduced to ensure that the position detected by the detection component and the position cut by the rejection device can better correspond.

[0012] Preferably, the turning and bending device includes a turning frame, an output frame is provided on one side of the turning frame for outputting materials, the output frame is provided with an output roller and is movably mounted on the turning frame, the output frame can move laterally in a direction perpendicular to the material conveying direction, and the turning frame is provided with an adjustment mechanism for adjusting the position of the output frame; by setting the output frame as a laterally movable and adjustable structure, the center position of the output material can be adjusted according to different material widths, ensuring that the center of the material in the width direction is always aligned with the subsequent edge sealing device, so as to better ensure normal production of the product.

[0013] Preferably, the adjustment structure includes an adjustment screw rotatably mounted on the turning frame, one end of the screw is rotatably connected to the output frame, and the other end is provided with a hand wheel.

[0014] Preferably, the adjustment structure also includes a position detection element for feeding back the position of the conveyor frame, and the position detection element is connected to the control element signal; the position detection element is a wire encoder or a distance sensor; a scale is provided on the flipping frame; through the above-mentioned settings, not only can automatic position detection compensation be performed through the position detection element, but also the corresponding position can be manually controlled and the distance correction data can be obtained and compensated by observing the scale.

[0015] Preferably, a distance detection element is provided between the edge sealing device and the rejection device, and the distance detection element is connected to the control element signal; by detecting the distance between the edge sealing device and the rejection device, the actual distance between the edge sealing device and the rejection device is fed back to avoid the movement of the rejection device affecting the correspondence of the rejection position, reducing the error caused by transportation, and ensuring the accuracy of rejection.

[0016] Preferably, the distance detection element is any one of a wire encoder, a laser sensor or an ultrasonic sensor.

[0017] Preferably, a scale is also provided between the edge sealing device and the rejecting device, and the distance between the edge sealing device and the rejecting device can be controlled by observing the parameters of the scale to further ensure the rejecting accuracy.

[0018] Preferably, the edge sealing device is provided with a beat monitoring element for monitoring the running beat of the bag making machine, and the beat monitoring element can be a proximity sensor or a photoelectric sensor, which is connected to the control element signal; by setting the beat monitoring element, the running beat of the bag making machine is detected, and the actual detection value is compared with the theoretical value and the parameter is corrected, which can further ensure the timing synchronization of the detection component and the rejection device, avoid the probability of rejection dislocation, and further improve the rejection accuracy. Since the existing cutter often detects the length of the material passing through the edge sealing device during the cutting operation, each time the length of the material passing reaches the preset bag length, the cutter will be controlled to cut down, generating a corresponding cutting interval, that is, the running beat of the bag making machine. By detecting the running beat, the control element can calculate the length value of the bag to be rejected, and compare the value with the theoretical value to correct the parameters.

[0019] Preferably, the edge sealing device includes a cutter, and the detection area of ​​the rhythm monitoring element is the lowest position of the cutter during cutting operation; by setting the specific position of the rhythm monitoring element, the operating rhythm of the bag making machine can be detected more accurately, further ensuring the rejection accuracy; by detecting the moment when the cutter cuts the bag, the cutter speed will tend to zero, which can reduce the rhythm error caused by the speed difference of the cutter, thereby indirectly improving the rejection angle.

[0020] The technical effect of the present invention is as follows: by arranging the detection component in the feeding section and detecting the rotation angles of the buffer frame and the floating frame in real time, the adaptive rotation angle of the buffer frame during the material conveying process is obtained, and the compensation calculation of the material length conveyed between the detection component and the rejection device can be performed according to the rotation angles of the buffer frame and the floating frame to ensure that the position detected by the detection component is consistent with the position cut by the rejection device, thereby ensuring the comprehensiveness of material detection, reducing the error caused by transportation, ensuring the accuracy of rejection, reducing the waste caused by rejection, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a first structural schematic diagram of the present invention.

[0022] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0023] Figure 3 for Figure 1 A partial enlarged view of point B in the middle.

[0024] Figure 4 This is a second structural schematic diagram of the present invention.

[0025] Figure 5 for Figure 4 A partial enlarged view of point C in the middle.

[0026] Figure 6 It is a cross-sectional schematic diagram of the present invention.

[0027] The main technical features in the figure are marked as follows: 1. feeding device; 10. material; 11. feeding rack; 12. unloading roller; 13. feeding roller; 14. floating rack; 2. turning and bending device; 21. turning rack; 22. guide roller; 23. output rack; 24. output roller; 25. guide wheel; 26. guide rail; 3. edge sealing device; 31. beat monitoring device; 4. rejection device; 5. detection component; 51. detection rack; 52. detection camera; 6. adjusting screw; 61. scale; 62. hand wheel; 63. center block; 64. position detection element; 7. buffer rack; 71. conveyor roller; 72. buffer rack; 8. stroke feedback element; 81. rotating rod; 82. position feedback element; 83. bar ring; 84. lever; 9. distance detection element. DETAILED DESCRIPTION

[0028] The present invention will be further described below through specific implementation modes and accompanying drawings.

[0029] Example 1: Figures 1 to 6 As shown, a precise rejection device for a bag making machine is installed on the bag making machine. The bag making machine is composed of a feeding device 1, a turning and bending device 2, a side sealing device 3 and a rejection device 4 arranged in sequence. The feeding device 1, the turning and bending device 2, the side sealing device 3 and the rejection device 4 are all prior arts.

[0030] Specifically, the feeding device 1 includes a feeding frame 11 , a discharge roller 12 and a feeding roller 13 . A floating frame 14 is rotatably mounted on the feeding frame 11 , and a floating roller is rotatably mounted on the floating frame 14 for adaptively matching the tension of the input material 10 .

[0031] Furthermore, a detection component 5 is provided above the feeding device 1, and the detection component 5 includes a detection frame 51, and a detection camera 52 is installed on the detection frame 51 to capture the image of the material 10 through camera photography and feed it back to the control element to analyze the defects of the material 10.

[0032] Specifically, the flipping and folding device 2 includes a flipping frame 21, and the flipping frame 21 is provided with a plurality of guide rollers 22 for guiding the material 10 to flip, convey and fold the material 10. The arrangement of the guide rollers 22 is the prior art. The guide rollers 22 flip and fold the material 10 and then send the output frame 23 to output the material 10 into the edge sealing device 3.

[0033] Furthermore, an output frame 23 is provided on one side of the turning frame 21 for outputting the material 10, and an output roller 24 is provided on the output frame 23 and is movably mounted on the turning frame 21, and guide wheels 25 are installed on the top and bottom of the output frame 23, and guide rails 26 are provided on the top and bottom of the turning frame 21 in a direction perpendicular to the conveying direction of the material 10, and the guide wheels 25 are slidably mounted on the guide wheels 25, and the output frame 23 can move laterally in a direction perpendicular to the conveying direction of the material 10.

[0034] Furthermore, the flip frame 21 is provided with an adjustment mechanism for adjusting the position of the output rack 23; a scale 61 is provided on the top of the flip frame 21; the adjustment structure includes an adjustment screw 6 and a position detection element 64, the adjustment screw 6 is rotatably installed on a side rod of the flip frame 21, one end of which is rotatably connected to the output rack 23, and the other end is provided with a hand wheel 62, and the output rack 23 can be driven to move by rotating the hand wheel 62; the position detection element 64 is located on one side of the output rack 23 and is installed on the flip frame 21; a center block 63 is fixedly connected to the top center of the output rack 23, and the position detection element 64 can be a wire encoder, and one end of the wire of the wire encoder is connected to the center block 63; the position detection element 64 can also be a distance sensor, such as a laser sensor or an ultrasonic sensor, which determines the position of the conveying rack by detecting the position of the center block 63.

[0035] Furthermore, a buffer frame 7 is provided between the flipping and bending device 2 and the edge sealing device 3. The buffer frame 7 is provided with a plurality of conveying rollers 71 along the material 10 conveying path, and a buffer frame 72 is rotatably mounted thereon. A stroke feedback element 8 is installed on the rotating shaft of the buffer frame 7 for detecting the flipping stroke of the buffer frame 72.

[0036] Specifically, the stroke feedback element 8 is installed on the buffer frame 7. The stroke feedback element 8 can be any one of a rotary encoder, a photoelectric encoder, and a magnetic encoder. By actually measuring the swing angle of the buffer frame, it is mapped correspondingly to the material compensation length, so that a correction value of the transportation distance of the material for compensation and correction is input into the control element accordingly; the stroke feedback element 8 can also be any one of a wire encoder, a laser ranging sensor, and an ultrasonic ranging sensor. By actually measuring the swing distance of the buffer frame, it is mapped correspondingly to the material change length, so that a correction value of the transportation distance of the material for compensation and correction is input into the control element accordingly.

[0037] Furthermore, a rotating rod 81 is fixedly connected to one end of the rotating shaft of the buffer rack 72, and a lever 84 is provided at one end of the rotating rod 81. An extreme position feedback element 82 is provided on the side wall of the buffer rack, and a bar ring 83 is provided on the detection end of the extreme position feedback element 82. The lever 84 is inserted into the bar ring 83. The extreme position feedback element 82 is connected with the control element signal. When the rotation of the buffer rack 72 is abnormal and its forward or reverse rotation angle reaches a certain extreme angle, the lever 84 will move the bar ring 83 to trigger the extreme position feedback element 82 to feedback the abnormal situation; the extreme position feedback element 82 can be a sliding resistor; through the extreme position feedback element 82, the extreme rotation stroke of the buffer rack 72 can be detected to ensure that the material 10 is transported within the normal range and the normal production of the bag making machine is ensured.

[0038] Furthermore, a distance detection element 9 is provided between the edge banding device 3 and the rejecting device 4. The distance detection element 9 is connected to the control element signal, and one end of the distance detection element 9 is fixedly connected to the edge banding device 3, and the other end is fixedly connected to the rejecting device 4. By detecting the distance between the edge banding device 3 and the rejecting device 4, the real-time spacing between the edge banding device 3 and the rejecting device 4 is fed back to avoid the movement of the rejecting device 4 affecting the correspondence of the die-cutting position, reducing the error caused by transportation, and ensuring the quality of product production.

[0039] Furthermore, a scale is provided between the edge sealing device and the rejecting device to facilitate an operator to manually adjust the relative position and distance between the edge sealing device and the rejecting device.

[0040] Furthermore, a rhythm monitoring element 31 is provided at the edge banding device. The rhythm monitoring element is installed on the edge banding device and is located on one side of the cutter. Its detection area is the lowest position of the cutter during cutting. The rhythm monitoring element can be a proximity sensor or a photoelectric sensor, which is connected to the control element signal.

[0041] Specifically, the beat monitoring element, the stroke feedback element 8, the detection component 5, the distance detection element 9, and the position detection element 64 are connected to the control element signal, and the control element can be a computer, MCU, PLC, etc.

[0042] Specifically, the rejection method of the rejection device is selected according to actual production needs. It can be a cutting and rejection device composed of a cutting mechanism and a rejection mechanism. Defective products are rejected after cutting. The rejection mechanism can be a telescopic rejection mechanism, a flap rejection mechanism, an air-blowing rejection mechanism, a robot rejection mechanism, etc.; it is also possible not to cut the defective products and directly transport them to the corresponding area for processing.

[0043] The specific implementation process of the present invention is as follows: ① The printed material 10 is installed on the unloading roller 12 of the bag making machine, and the feeding of the material 10 is controlled by the corresponding conveying motor.

[0044] ② The detection component 5 takes a photo to capture the image of the conveyed material 10 and feeds it back to the control component to identify the detection defect; the control component records the corresponding defect position.

[0045] ③ The material 10 continues to be conveyed, and after being folded by the turning and bending device 2, it enters the buffer rack 72. The conveying speed and tensioning force of the material 10 on the buffer rack 72 are adaptively adjusted in angle. The stroke feedback element 8 there converts the rotation stroke into an electrical signal and feeds it back to the control element, and performs position correction and compensation for the conveying length of the material 10 according to the preset value.

[0046] ④ The material 10 continues to be conveyed, the edge sealing device heat seals and cuts the material, the beat monitoring element 31 monitors the operating status of the cutter, and feeds back the triggered signal to the control element. The control element calculates the actual length of the material to be rejected based on the feedback signal. Since the number of bags is an integer, the length of a single bag is pre-input as L. The control element calculates the length of the distance detection component of the rejection device to obtain the theoretical length N*L, and compares the actual length to be rejected with the theoretical length. When (N-0.5)*L<actual length to be rejected<(N+0.5)*L, a correction signal is sent to the control element to perform length compensation and correct the length to be rejected to N*L.

[0047] ⑤ Material 10 continues to be transported to the rejection device. According to the defect position recorded by the control element, the control element calculates the real-time distance from the defect to the rejection device and rejects the defective product. Embodiment 2: The other technical means recorded in this embodiment are consistent with those in Embodiment 1, and the main difference is that:

[0048] The detection area of ​​the detection device is located on the front side of the floating frame 14. At this time, there is a stroke feedback element 8 at one end of the rotating shaft of the floating frame 14. The stroke feedback element 8 is fixedly installed on the side wall of the feeding frame 11 to detect the rotation angle of the floating frame 14; the stroke feedback element is also connected to the control element signal. When feeding, the rotation angle or swing distance of the floating frame 14 is detected in real time through the stroke feedback element 8 on the floating frame 14, so as to detect the flipping stroke of the floating frame 14, so as to perform position correction and compensation for the conveying length of the material 10 according to the preset value.

[0049] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. The present invention can be used in similar products or methods. Any changes or modifications made by any technician in the field of the present invention are covered by the patent scope of the present invention.

Claims

1. A precise rejection device for a bag making machine, installed on the bag making machine, the bag making machine comprising a feeding device (1), a turning and bending device (2), an edge sealing device (3) and a rejection device (4), characterized in that: The invention comprises a control element, a detection component (5) is arranged above the feeding device (1), a buffer frame (7) is arranged between the turning and bending device (2) and the edge sealing device (3), the buffer frame (7) is provided with a plurality of conveying rollers (71) along the material (10) conveying path, and a buffer frame (72) is rotatably mounted thereon, a stroke feedback element (8) for detecting the turning stroke of the buffer frame (72) is mounted on the buffer frame (7), and the stroke feedback element (8) and the detection component (5) are connected to the control element signal.

2. The precise rejection device for a bag making machine according to claim 1, characterized in that: The stroke feedback element (8) is any one of a rotary encoder, a photoelectric encoder, a magnetic encoder, a wire encoder, a laser distance sensor, and an ultrasonic distance sensor.

3. The precise rejection device for a bag making machine according to claim 1, characterized in that: A rotating rod (81) is fixedly connected to one end of the rotating shaft of the buffer frame (72), and a lever (84) is provided at one end of the rotating rod (81). An extreme position feedback element (82) is provided on the side wall of the buffer frame, and a bar ring (83) is provided on the detection end of the extreme position feedback element (82). The lever (84) is inserted into the bar ring (83). The extreme position feedback element (82) is connected to the control element signal. When the buffer frame (72) rotates abnormally and its forward or reverse rotation angle reaches a certain extreme angle, the lever (84) will move the bar ring (83) to trigger the extreme position feedback element (82) to feedback the abnormal situation.

4. The precise rejection device for a bag making machine according to claim 1, characterized in that: The feeding device (1) is rotatably connected to a floating frame (14), and a stroke feedback element (8) is also installed on the rotating shaft of the floating frame (14).

5. The precise rejection device for a bag making machine according to claim 1, characterized in that: The turning and bending device (2) comprises a turning frame (21), a side of the turning frame (21) for outputting the material (10) is provided with an output frame (23), the output frame (23) is provided with an output roller (24) and is movably mounted on the turning frame (21), the output frame (23) can move transversely in a direction perpendicular to the conveying direction of the material (10), and the turning frame (21) is provided with an adjustment mechanism for adjusting the position of the output frame (23).

6. The precise rejection device for a bag making machine according to claim 5, characterized in that: The adjustment structure comprises an adjustment screw (6) rotatably mounted on the turning frame (21), one end of the screw is rotatably connected to the output frame (23), and the other end is provided with a hand wheel (62).

7. The precise rejection device for a bag making machine according to claim 5, characterized in that: The adjustment structure also includes a position detection element (64) for feeding back the position of the conveyor frame, the position detection element (64) is connected to the control element signal, and the position detection element (64) is a wire encoder or a distance sensor; and a scale (61) is provided on the turning frame (21).

8. The precise rejection device for a bag making machine according to claim 1, characterized in that: A distance detection element (9) is provided between the edge sealing device (3) and the rejection device (4); the distance detection element (9) is connected to the control element signal; the distance detection element (9) is any one of a wire encoder, a laser sensor or an ultrasonic sensor.

9. The precise rejection device for a bag making machine according to claim 1, characterized in that: The edge sealing device (3) is provided with a rhythm monitoring element for monitoring the running rhythm of the bag making machine. The rhythm monitoring element may be a proximity sensor or a photoelectric sensor, which is connected to the control element signal.

10. The precise rejection device for a bag making machine according to claim 9, characterized in that: The edge sealing device comprises a cutter, and the detection area of ​​the rhythm monitoring element is the lowest position of the cutter during cutting operation.

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