Printing film positioning detection equipment for printing roller

Abstract

The invention discloses a printing film positioning detection device for a printing roller, which belongs to the technical field of printing detection, and has the technical key points that the printing film positioning detection device comprises a bottom plate, the three links of feeding, detection and discharging can be orderly joined and continuously operated through an arranged positioning feeding detection mechanism, the time waste caused by traditional single manual carrying, waiting and adjustment is avoided, and the working efficiency is improved. The detection period of a single printing roller is shortened, the continuous detection requirement of a large batch of printing rollers can be met, automatic distribution operation can be performed according to detection results through the arranged discharging screening conveying mechanism, automatic distinguishing and classified circulation of qualified products and unqualified products are achieved, manual sorting, judgment and carrying are not needed, and the detection efficiency is improved. According to the invention, unqualified products are fundamentally prevented from being mixed into qualified products to flow into the next process, the product management and control precision is improved, the equipment operation efficiency is further improved, the overall assembly quality of the printing roller and the product percent of pass of printing production are improved, and the device has the advantages of convenience in positioning detection and high automation degree.

Description

Technical Field

[0001] This invention relates to the field of printing inspection, specifically to a printing film positioning inspection device for printing rollers. Background Technology

[0002] In the process of the printing industry transforming towards high precision, automation, and large scale, the printing roller, as the core key component of the printing machine, directly determines the quality stability and pass rate of the printed products by the positioning accuracy of the printed film on its surface. It is widely used in various printing scenarios such as packaging printing, electronic printing, and textile printing and dyeing.

[0003] Before printing, printing rollers are usually covered with a soft printing film on their outer wall. After the printing film is covered, the seam of the film must be parallel to the axis of the printing roller. To improve the accuracy of the printed pattern, after the printing film is covered on the printing roller, the worker needs to use tools such as a ruler to check the seam formed at both ends of the printing film. After the check is completed, the printing roller covered with the printing film is installed on the printing machine for use. When checking the seam of the printing film, it is difficult for the worker to ensure that the seam of the printing film is parallel to the axis of the printing roller by measuring and observing with a ruler, resulting in low accuracy of the check.

[0004] Chinese patent document CN115165735A discloses a technical solution including a machine body, a mounting bracket, and a detection mechanism. The mounting bracket is set on the machine body and has a detection area for detachable connection of printing rollers. Although the above-mentioned positioning and detection device can detect the seam of the printing film, the process of loading and detecting the printing rollers is a single-cycle operation mode of "single roller loading - single roller detection - single roller unloading". The work efficiency is low, which seriously restricts the production efficiency and detection accuracy of the printing industry, increases the production cost of enterprises, and cannot effectively automatically screen and place qualified and unqualified products. The degree of automation is low and cannot meet the actual use requirements.

[0005] Therefore, there is a need for a printing film positioning detection device for printing rollers, which aims to solve the above problems. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a printing film positioning and detection device for printing rollers, which aims to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A printing film positioning and inspection device for printing rollers includes a base plate, on which a loading ramp for tilting and loading printing rollers to be inspected is provided. A detection placement platform for positioning and inspecting the printing rollers to be inspected is provided on one side of the loading ramp. A screening table is provided on one side of the detection placement platform, and a discharge seat is provided on one side of the screening table. The device also includes: A positioning and feeding inspection mechanism is installed at the connection between the feeding ramp and the inspection placement platform. It is used to feed the printing rollers to be inspected one by one for positioning and inspection. The positioning and feeding inspection mechanism includes a first pusher wedge and a second pusher wedge for feeding drive and an inspection head for feeding inspection. The inspection head is movably installed directly above the inspection placement platform. The first pusher wedge and the second pusher wedge are both movably installed on the lower side of the feeding ramp and the inspection placement platform. The top of the inspection placement platform is provided with a placement groove for placing the printing rollers to be inspected. The material feeding and screening conveying mechanism is installed at the connection between the screening table and the discharge seat. It is used to screen and feed qualified and unqualified products of the printing roller to be inspected. The material feeding and screening conveying mechanism includes a feeding wedge for driving the feeding of unqualified products. The screening table is provided with a feeding groove for feeding unqualified products. The feeding wedge is adapted to slide on the feeding groove, and the feeding groove is connected to a guide groove for storing materials. The inclined end face of the feeding wedge is parallel to the plane of the screening table.

[0008] As a further embodiment of the present invention, the positioning and feeding detection mechanism further includes a feeding cylinder for driving the first and second feeding wedges to lift and push the material. The first and second feeding wedges are both fixedly installed on the lifting plate. The lifting plate is fixedly connected to the piston rod of the feeding cylinder. The feeding cylinder is fixedly installed on the base plate. A first clearance groove for avoiding the first feeding wedge is provided on the feeding inclined platform. A second clearance groove for avoiding the second feeding wedge is provided on the detection placement platform.

[0009] As a further embodiment of the present invention, the positioning and feeding detection mechanism further includes a docking column for receiving and inspecting the printing roller. The docking column is installed on a rotating platform. The rotating platform is fixedly connected to the piston rod of the first electric push rod. The first electric push rod is fixedly installed on the L-shaped connecting plate. The L-shaped connecting plate is slidably connected to the detection placement platform, and an inclined platform is provided on the side of the detection placement platform near the feeding inclined platform.

[0010] As a further embodiment of the present invention, the positioning and feeding detection mechanism further includes a second motor for driving the docking column to move up and down. The L-shaped connecting plate is threadedly connected to the transmission screw. The transmission screw is rotatably installed inside the detection placement platform. A first synchronous belt is driven and connected to the transmission screw, and the output shaft of the second motor is fixedly connected to one side of the transmission screw. The second motor is fixedly installed on the detection placement platform.

[0011] As a further embodiment of the present invention, the positioning and feeding detection mechanism further includes a first motor for driving the detection head to move linearly. The detection head is slidably connected to the top plate via a movable seat, and the movable seat is threadedly connected to a bidirectional lead screw. The bidirectional lead screw is rotatably mounted on the top plate. A worm gear is fixedly connected to the bidirectional lead screw, and the worm gear is meshed with a worm. The worm is fixedly connected to the output shaft of the first motor. The first motor is fixedly mounted on the top plate, and the top plate is fixedly mounted on the bottom plate via a support rod.

[0012] As a further embodiment of the present invention, the feeding screening and conveying mechanism further includes a second electric push rod for driving the feeding wedge to rise and fall. The feeding wedge is fixedly connected to the piston rod of the second electric push rod. The second electric push rod is fixedly installed inside the screening table. The inside of the guide trough is provided with a protective pad for feeding protection. The outside of the screening table is provided with a material picking door, and the material picking door is set towards the guide trough.

[0013] As a further embodiment of the present invention, the feeding and screening conveying mechanism further includes a feeding plate for feeding qualified products one by one, the feeding plate is provided with a plurality of receiving blocks for receiving the printing roller to be inspected, and the two side walls of the printing roller to be inspected are provided with a plurality of limiting protrusions for placing the printing roller to be inspected.

[0014] As a further embodiment of the present invention, the material feeding and screening conveying mechanism further includes a first rotating rod and a second rotating rod for driving the receiving block to reciprocate to receive and pick up materials. One end of the first rotating rod and the second rotating rod are rotatably mounted on the feeding plate, and the other end of the first rotating rod and the second rotating rod are rotatably mounted on the discharge seat. The other end of the first rotating rod is eccentrically fixed to the first eccentric wheel through a connecting shaft, and the other end of the second rotating rod is eccentrically fixed to the second eccentric wheel through a connecting shaft. The two ends of the transmission rod are respectively rotatably connected to the first eccentric wheel and the second eccentric wheel.

[0015] As a further embodiment of the present invention, the other end of the first rotating rod is connected to the output shaft of a third motor via a connecting shaft and a second synchronous belt, and the third motor is fixedly installed on the discharge seat.

[0016] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art: This invention, through its positioning and feeding detection mechanism, enables the orderly and continuous operation of the feeding, detection, and unloading processes. This avoids the time wasted by traditional manual handling, waiting, and adjustment of individual printing rollers, shortens the detection cycle of a single printing roller, and can adapt to the continuous detection needs of large batches of printing rollers, significantly improving overall detection efficiency. At the same time, it eliminates the need for manual intervention in feeding and unloading, greatly reducing labor intensity and labor costs. It also avoids problems such as printing film misalignment, scratches, and wrinkles caused by manual operation, thus improving the stability of detection and products.

[0017] The set-up material sorting and conveying mechanism can automatically divert the operation according to the test results. That is, qualified printing rollers are conveyed and unloaded normally one by one, while unqualified printing rollers are automatically guided and collected into the corresponding guide trough for centralized storage. This realizes automatic differentiation and classification of qualified and unqualified products, eliminating the need for manual sorting, judgment and handling. It fundamentally avoids unqualified products from being mixed with qualified products and flowing into the next process, improves the accuracy of product control, further improves the efficiency of equipment operation, and helps to improve the overall assembly quality of printing rollers and the product qualification rate of printing production.

[0018] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the invention; Figure 2 This is a side view of an embodiment of the invention. Figure 3 This is a schematic diagram of the loading ramp in an embodiment of the invention; Figure 4 This is a schematic diagram of the connection structure of the detection placement stage in an embodiment of the invention; Figure 5 This is a schematic diagram of the connection structure inside the top plate in an embodiment of the invention; Figure 6 This is a schematic diagram of the side structure of the loading ramp in an embodiment of the invention; Figure 7 This is a schematic diagram of the top connection structure of the detection placement platform in an embodiment of the invention; Figure 8 This is a schematic diagram of the connection structure inside the detection placement platform in an embodiment of the invention; Figure 9 This is a cross-sectional view of the internal structure of the screening table in an embodiment of the invention. Figure 10 This is a schematic diagram of the structure of the discharge seat in an embodiment of the invention; Figure 11 This is a cross-sectional view of the internal structure of the discharge seat in an embodiment of the invention.

[0020] Reference numerals: 1. Base plate; 2. Feeding ramp; 3. Printing roller to be inspected; 4. Support rod; 5. Top plate; 6. First motor; 7. Detection head; 8. Moving seat; 9. Bidirectional lead screw; 10. Worm gear; 11. Worm; 12. Detection placement platform; 13. First clearance groove; 14. Second clearance groove; 15. Placement groove; 16. Lifting plate; 17. First pusher wedge; 18. Second pusher wedge; 19. First electric pusher; 20. Rotary table; 21. Connecting column; 22. L-shaped connecting plate; 23. Transmission screw 24. Second motor; 25. First synchronous belt; 26. Screening table; 27. Feeding chute; 28. Feeding wedge; 29. ​​Second electric push rod; 30. Guide chute; 31. Protective pad; 32. Discharge seat; 33. Limiting protrusion; 34. Feeding plate; 35. Receiving block; 36. First rotating rod; 37. Second rotating rod; 38. First eccentric wheel; 39. Transmission rod; 40. Second eccentric wheel; 41. Second synchronous belt; 42. Third motor; 43. Feed gate; 44. Top material cylinder; 45. Inclined table. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0023] See Figures 1 to 8 A printing film positioning and inspection device for printing rollers includes a base plate 1, a feeding ramp 2 for tilting and feeding printing rollers 3 to be inspected, an inspection placement table 12 for positioning and inspecting the printing rollers 3 to be inspected is provided on one side of the feeding ramp 2, a screening table 26 is provided on one side of the inspection placement table 12, and a discharge seat 32 is provided on one side of the screening table 26. The device also includes: The positioning and feeding inspection mechanism is installed at the connection between the feeding ramp 2 and the inspection placement platform 12. It is used to feed the printing rollers 3 to be inspected one by one for positioning and inspection. The positioning and feeding inspection mechanism includes a first pusher wedge 17 and a second pusher wedge 18 for feeding drive and an inspection head 7 for feeding inspection. The inspection head 7 is movably installed directly above the inspection placement platform 12. The first pusher wedge 17 and the second pusher wedge 18 are both limited and movably installed on the lower side of the feeding ramp 2 and the inspection placement platform 12. The top of the inspection placement platform 12 is provided with a placement groove 15 for placing the printing rollers 3 to be inspected.

[0024] Furthermore, the positioning and feeding detection mechanism also includes a feeding cylinder 44 for driving the first pushing wedge plate 17 and the second pushing wedge plate 18 to lift and push the material. The first pushing wedge plate 17 and the second pushing wedge plate 18 are both fixedly installed on the lifting plate 16. The lifting plate 16 is fixedly connected to the piston rod of the feeding cylinder 44. The feeding cylinder 44 is fixedly installed on the base plate 1. The feeding inclined platform 2 is provided with a first clearance groove 13 for avoiding the first pushing wedge plate 17. The detection placement platform 12 is provided with a second clearance groove 14 for avoiding the second pushing wedge plate 18.

[0025] Furthermore, the positioning and feeding detection mechanism also includes a docking column 21 for receiving and inspecting the printing roller 3. The docking column 21 is installed on the rotary table 20. The rotary table 20 is fixedly connected to the piston rod of the first electric push rod 19. The first electric push rod 19 is fixedly installed on the L-shaped connecting plate 22. The L-shaped connecting plate 22 is slidably connected to the detection placement table 12. An inclined table 45 is provided on the side of the detection placement table 12 near the feeding inclined table 2.

[0026] Furthermore, the positioning and feeding detection mechanism also includes a second motor 24 for driving the docking column 21 to move up and down. The L-shaped connecting plate 22 is threadedly connected to the transmission screw 23. The transmission screw 23 is rotatably installed inside the detection placement table 12. A first synchronous belt 25 is connected to the transmission screw 23, and the output shaft of the second motor 24 is fixedly connected to one side of the transmission screw 23. The second motor 24 is fixedly installed on the detection placement table 12.

[0027] Furthermore, the positioning and feeding detection mechanism also includes a first motor 6 for driving the detection head 7 to move linearly. The detection head 7 is slidably connected to the top plate 5 via a movable seat 8, and the movable seat 8 is threadedly connected to a bidirectional lead screw 9. The bidirectional lead screw 9 is rotatably mounted on the top plate 5. A worm gear 10 is fixedly connected to the bidirectional lead screw 9, and the worm gear 10 is meshed with a worm 11. The worm 11 is fixedly connected to the output shaft of the first motor 6. The first motor 6 is fixedly mounted on the top plate 5, and the top plate 5 is fixedly mounted on the bottom plate 1 via a support rod 4.

[0028] Preferably, during the positioning detection of the printed film, multiple printing rollers 3 to be inspected can be placed on the loading ramp 2 for loading. Due to the tilting action of the loading ramp 2, multiple printing rollers 3 to be inspected can move towards the detection placement table 12. During loading detection, the top cylinder 44 drives the first push wedge plate 17 and the second push wedge plate 18 on the lifting plate 16 to rise and move. Due to the tilting of one end of the first push wedge plate 17 and the ramp 45, the printing roller 3 to be inspected at the end of the loading ramp 2 can be moved to the placement groove 15 on the detection placement table 12. At this time, the first electric push rod 19 drives the docking column 21 on the rotating table 20 to extend into the end of the printing roller 3 to be inspected for limiting treatment.

[0029] The rotary table 20 performs corresponding rotational control on the printing roller 3 to be inspected. At the same time, the output shaft of the second motor 24 drives the transmission screw 23 to rotate. Thus, under the relationship of threaded connection and transmission connection of the first synchronous belt 25, the docking columns 21 on both sides of the inspection placement table 12 can drive the printing roller 3 to be inspected to move upward. The inspection head 7 above performs inspection processing. At the same time, the output shaft of the first motor 6 drives the inspection head 7 to move linearly under the relationship of threaded connection of the bidirectional screw 9. This allows for good inspection processing of the printing film on the printing roller 3. After the inspection is completed, the second pushing wedge plate 18 on the lifting plate 16 can be lifted by the top material cylinder 44, which facilitates subsequent feeding and unloading processing at the placement groove 15.

[0030] This sequential loading and unloading inspection method ensures that the loading, inspection, and unloading processes are seamlessly connected and run continuously. It avoids the time wasted by traditional manual handling, waiting, and adjustment of individual printing rollers, shortens the inspection cycle of a single printing roller, and can adapt to the continuous inspection needs of large batches of printing rollers, significantly improving overall inspection efficiency. At the same time, it eliminates the need for manual intervention in loading and unloading, greatly reducing labor intensity and labor costs. It also avoids problems such as printing film misalignment, scratches, and wrinkles caused by manual operation, thus improving the stability of inspection and products.

[0031] like Figures 1 to 11 As shown, this embodiment, based on the above embodiment, also includes a material feeding and screening conveying mechanism, which is installed at the connection between the screening table 26 and the discharge seat 32. It is used to screen and feed qualified and unqualified products of the printing roller 3 to be inspected. The material feeding and screening conveying mechanism includes a material feeding wedge 28 for driving the unqualified product feeding. The screening table 26 is provided with a material feeding groove 27 for unqualified product feeding. The material feeding wedge 28 is adapted to slide on the material feeding groove 27, and a material guide groove 30 for storing material is connected in the material feeding groove 27. The inclined end face of the material feeding wedge 28 is parallel to the plane of the screening table 26.

[0032] Furthermore, the material feeding and screening conveying mechanism also includes a second electric push rod 29 for driving the material feeding wedge 28 to rise and fall. The material feeding wedge 28 is fixedly connected to the piston rod of the second electric push rod 29. The second electric push rod 29 is fixedly installed inside the screening table 26. The inside of the guide trough 30 is provided with a protective pad 31 for material feeding protection. The outside of the screening table 26 is provided with a material picking door 43, and the material picking door 43 is set towards the guide trough 30.

[0033] Furthermore, the material feeding and screening conveying mechanism also includes a feeding plate 34 for feeding qualified products one by one. The feeding plate 34 is provided with a number of receiving blocks 35 for receiving the printing rollers to be inspected. The two side walls of the printing rollers to be inspected are provided with a number of limiting protrusions 33 for placing the printing rollers to be inspected.

[0034] Furthermore, the material feeding and screening conveying mechanism also includes a first rotating rod 36 and a second rotating rod 37 for driving the receiving block 35 to reciprocate to receive and pick up materials. One end of the first rotating rod 36 and the second rotating rod 37 are rotatably mounted on the feeding plate 34, and the other end of the first rotating rod 36 and the second rotating rod 37 are rotatably mounted on the discharge seat 32. The other end of the first rotating rod 36 is eccentrically fixed to the first eccentric wheel 38 through a connecting shaft, and the other end of the second rotating rod 37 is eccentrically fixed to the second eccentric wheel 40 through a connecting shaft. The two ends of the transmission rod 39 are rotatably connected to the first eccentric wheel 38 and the second eccentric wheel 40, respectively.

[0035] Furthermore, the other end of the first rotating rod 36 is connected to the output shaft of the third motor 42 via a connecting shaft and the second synchronous belt 41. The third motor 42 is fixedly installed on the discharge seat 32.

[0036] Preferably, in this embodiment, based on the feedback of the detection results, when the detected printing roller 3 fails to meet the requirements, the second electric push rod 29 drives the unloading wedge 28 to descend to a certain height. Since the printing roller 3 is pushed out from the detection placement table 12 at this time, when the unloaded printing roller 3 passes through the unloading groove 27, it falls onto the unloading wedge 28. At this time, the second electric push rod 29 drives the unloading wedge 28 to descend to a certain position. Under the action of the inclined surface of the unloading wedge 28, it can enter the guide groove 30 for movement and storage. The protective pad 31 set in the guide groove 30 can protect the entering printing roller 3 from falling. It can be opened through the material retrieval door 43 on the outside of the screening table 26 to facilitate the removal of the stored printing roller 3.

[0037] According to the feedback of the test results, when the tested printing roller 3 is qualified, the second electric push rod 29 drives the feeding wedge 28 to rise to a certain height. At this time, the end face of the feeding wedge 28 is aligned with the feeding surface of the screening table 26. The printing roller 3 fed from the test placement table 12 can then enter the subsequent position for stacking. When it is necessary to take out the qualified printing roller 3 one by one, the output shaft of the third motor 42 is driven to rotate. Thus, under the transmission action of the second synchronous belt 41 and the transmission rod 39, and the traction action of the first rotating rod 36 and the second rotating rod 37, the printing roller 3 at the end of the discharge seat 32 can be periodically picked up and fed out one by one, which facilitates subsequent operations.

[0038] It should be noted that the discharge end of the discharge seat 32, which is far from the screening table 26, can be equipped with an inclined surface and a collection box for collection, which is not shown in the figure.

[0039] This automatic sorting method based on test results allows for the normal, one-by-one feeding of qualified printing rollers, while unqualified rollers are automatically guided and collected into corresponding guide troughs for centralized storage. This achieves automatic differentiation and classification of qualified and unqualified products, eliminating the need for manual sorting, judgment, and handling. It fundamentally prevents unqualified products from mixing with qualified products and flowing into the next process, improving product control accuracy, further enhancing equipment operating efficiency, and contributing to improved overall assembly quality of printing rollers and higher product qualification rate in printing production.

[0040] It should be noted that the components in this application are all general standard parts or parts known to those skilled in the art, which effectively solve the technical problems raised in the background art.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A printing film positioning and detection device for printing rollers, comprising a base plate (1), characterized in that, The base plate (1) is provided with a loading ramp (2) for tilting the loading of the printing roller (3) to be inspected. A detection placement platform (12) for positioning and inspecting the printing roller (3) is provided on one side of the loading ramp (2). A screening table (26) is provided on one side of the detection placement platform (12). A discharge seat (32) is provided on one side of the screening table (26). The system also includes: The positioning and feeding detection mechanism is installed at the connection between the feeding ramp (2) and the detection placement platform (12) to feed the printing rollers (3) to be inspected one by one for positioning and detection processing. The positioning and feeding detection mechanism includes a first pusher wedge (17) and a second pusher wedge (18) for feeding drive and a detection head (7) for feeding detection. The detection head (7) is movably installed directly above the detection placement platform (12). The first pusher wedge (17) and the second pusher wedge (18) are both limited and movably installed on the lower side of the feeding ramp (2) and the detection placement platform (12). The top of the detection placement platform (12) is provided with a placement groove (15) for placing the printing rollers (3) to be inspected. The material feeding and screening conveying mechanism is installed at the connection between the screening table (26) and the discharge seat (32) and is used to screen and feed qualified and unqualified products of the printing roller (3) to be inspected. The material feeding and screening conveying mechanism includes a feeding wedge (28) for driving the feeding of unqualified products. The screening table (26) is provided with a feeding groove (27) for feeding unqualified products. The feeding wedge (28) is adapted to slide on the feeding groove (27) and the feeding groove (27) is connected to a guide groove (30) for storing materials. The inclined end face of the feeding wedge (28) is parallel to the plane of the screening table (26).

2. The printing film positioning and detection equipment for printing rollers according to claim 1, characterized in that, The positioning and feeding detection mechanism also includes a top material cylinder (44) for driving the first push wedge (17) and the second push wedge (18) to lift and top material. The first push wedge (17) and the second push wedge (18) are both fixedly installed on the lifting plate (16). The lifting plate (16) is fixedly connected to the piston rod of the top material cylinder (44). The top material cylinder (44) is fixedly installed on the base plate (1). The feeding inclined platform (2) is provided with a first clearance groove (13) for avoiding the first push wedge (17). The detection placement platform (12) is provided with a second clearance groove (14) for avoiding the second push wedge (18).

3. The printing film positioning and detection equipment for printing rollers according to claim 2, characterized in that, The positioning and feeding detection mechanism also includes a docking column (21) for receiving and inspecting the printing roller (3). The docking column (21) is installed on a rotary table (20). The rotary table (20) is fixedly connected to the piston rod of the first electric push rod (19). The first electric push rod (19) is fixedly installed on an L-shaped connecting plate (22). The L-shaped connecting plate (22) is slidably connected to the detection placement table (12). An inclined table (45) is provided on the side of the detection placement table (12) near the feeding inclined table (2).

4. The printing film positioning and detection equipment for printing rollers according to claim 3, characterized in that, The positioning and feeding detection mechanism also includes a second motor (24) for driving the docking column (21) to move up and down. The L-shaped connecting plate (22) is threaded onto the transmission screw (23). The transmission screw (23) is rotatably installed inside the detection placement table (12). A first synchronous belt (25) is connected to the transmission screw (23), and the output shaft of the second motor (24) is fixedly connected to one side of the transmission screw (23). The second motor (24) is fixedly installed on the detection placement table (12).

5. The printing film positioning and detection equipment for printing rollers according to claim 4, characterized in that, The positioning and feeding detection mechanism also includes a first motor (6) for driving the detection head (7) to move linearly. The detection head (7) is slidably connected to the top plate (5) through a movable seat (8), and the movable seat (8) is threadedly connected to a two-way lead screw (9). The two-way lead screw (9) is rotatably mounted on the top plate (5). A worm gear (10) is fixedly connected to the two-way lead screw (9). The worm gear (10) is meshed with a worm (11). The worm (11) is fixedly connected to the output shaft of the first motor (6). The first motor (6) is fixedly mounted on the top plate (5). The top plate (5) is fixedly mounted on the bottom plate (1) through a support rod (4).

6. The printing film positioning and detection equipment for printing rollers according to claim 1, characterized in that, The feeding screening and conveying mechanism also includes a second electric push rod (29) for driving the feeding wedge (28) to rise and fall. The feeding wedge (28) is fixedly connected to the piston rod of the second electric push rod (29). The second electric push rod (29) is fixedly installed inside the screening table (26). The inside of the guide trough (30) is provided with a protective pad (31) for feeding protection. The outside of the screening table (26) is provided with a material picking door (43), and the material picking door (43) is set towards the guide trough (30).

7. The printing film positioning and detection equipment for printing rollers according to claim 6, characterized in that, The feeding and screening conveying mechanism also includes a feeding plate (34) for feeding qualified products one by one. The feeding plate (34) is provided with a number of receiving blocks (35) for receiving the printing roller (3) to be inspected. The two side walls of the printing roller (3) to be inspected are provided with a number of limiting protrusions (33) for placing the printing roller (3) to be inspected.

8. The printing film positioning and detection equipment for printing rollers according to claim 7, characterized in that, The feeding and screening conveying mechanism also includes a first rotating rod (36) and a second rotating rod (37) for driving the receiving block (35) to reciprocate to receive and pick up materials. One end of the first rotating rod (36) and the second rotating rod (37) are rotatably mounted on the feeding plate (34), and the other end of the first rotating rod (36) and the second rotating rod (37) are rotatably mounted on the discharge seat (32). The other end of the first rotating rod (36) is eccentrically fixed to the first eccentric wheel (38) through the connecting shaft, and the other end of the second rotating rod (37) is eccentrically fixed to the second eccentric wheel (40) through the connecting shaft. The two ends of the transmission rod (39) are rotatably connected to the first eccentric wheel (38) and the second eccentric wheel (40).

9. The printing film positioning and detection equipment for printing rollers according to claim 8, characterized in that, The other end of the first rotating rod (36) is connected to the output shaft of the third motor (42) via a connecting shaft and a second synchronous belt (41). The third motor (42) is fixedly installed on the discharge seat (32).

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