Film covering device for advertisement flex banner

Abstract

The utility model relates to a film covering device for advertisement inkjet cloth, and relates to the field of advertisement inkjet technology, the film covering device comprises a rack, a film outlet roller, a traction roller and an electromagnetic heating roller are rotatably installed on the rack, and the traction roller is located between the film outlet roller and the electromagnetic heating roller; a film pressing plate is arranged above the film laminating platform on the rack in a lifting manner; a sponge is detachably mounted at the bottom of the film pressing plate; the thickness detection module is used for detecting the thickness of the flex banner and outputting a cloth thickness signal; the control module is in signal connection with the signal output end of the thickness detection module and is used for receiving the cloth thickness signal and outputting a control signal; the driving module is used for receiving the control signal and driving the film pressing plate to move towards or away from the film laminating platform; the image acquisition module is used for continuously acquiring images after the flex banner is coated with a film and outputting image data; and the memory is used for receiving and storing the image data. The use convenience of the film covering device can be improved.

Description

Technical Field

[0001] The present application relates to the field of advertising inkjet printing technology, and in particular to a laminating device for advertising inkjet printing cloth. Background Art

[0002] Printed cloth, commonly known as light box cloth, is a kind of printing material made of polyvinyl chloride through a certain production process. It is mainly used for outdoor advertising printing. The service life of the printed cloth is greatly affected by the environment. Regional sunshine, humidity and other factors largely determine the life of the printed cloth. The material of the printed cloth will also affect its service life. In order to ensure that the printed picture on the surface of the printed cloth is maintained for a long time, it is necessary to coat the surface of the printed cloth. The films used for coating include polypropylene (PP), polyvinyl chloride (PVC), polyethylene (PEF), polypropylene (BOPP), polyester (PE) and polycarbonate (PC).

[0003] In the prior art, a common laminating device for inkjet printed cloth mainly comprises a frame, on which a cloth delivery roller, a cloth receiving roller and a film delivery roller are installed, wherein the cloth delivery roller is rotatably mounted on the frame through a damping mounting seat, and the cloth receiving roller is rotatably mounted on the frame and is driven by a driving motor on the frame to rotate at a uniform speed, so that the inkjet printed cloth passes through the laminating platform on the frame at a uniform speed, and the film delivery roller is mounted above the laminating platform, and the film material delivered by the film delivery roller is pulled by a traction roller and limited by a film pressing roller, and then adhered to the inkjet printed cloth on the surface of the laminating platform, so as to realize the laminating processing operation on the inkjet printed cloth.

[0004] However, in the actual production process, the laminating device often needs to laminate printed cloths of different thicknesses, and the existing laminating device requires the operator to adjust the position of the film pressing roller to ensure that the position between the lower roller surface of the film pressing roller and the upper surface of the printed cloth is appropriate. The adjustment process is relatively cumbersome, time-consuming and labor-intensive, and there is room for improvement. Utility Model Content

[0005] In order to improve the convenience for operators to use a laminating device to perform laminating processing operations on inkjet printed cloth, the present application provides a laminating device for advertising inkjet printed cloth.

[0006] The present application provides a coating device for advertising inkjet printed cloth adopts the following technical solution:

[0007] A film coating device for advertising inkjet cloth comprises a frame, on which a film discharge roller, a traction roller and an electromagnetic heating roller are rotatably mounted, wherein the traction roller is located between the film discharge roller and the electromagnetic heating roller;

[0008] A film pressing plate is provided on the frame above the film laminating platform in a lifting manner, a sponge is detachably mounted on the bottom of the film pressing plate, and the film pressing plate is located between the electromagnetic heating roller and the cloth collecting roller; and:

[0009] A thickness detection module, arranged on the laminating platform, for detecting the thickness of the printing cloth and outputting a cloth thickness signal;

[0010] A control module, whose signal input end is signal-connected to the signal output end of the thickness detection module, for receiving the cloth thickness signal and outputting a control signal;

[0011] A driving module, fixedly mounted on the frame, with a driving end fixedly connected to the top of the film pressing plate, and connected to the signal output end of the control module, for receiving the control signal and driving the film pressing plate to move toward or away from the film laminating platform;

[0012] An image acquisition module is fixedly mounted on the frame and is set above the laminating platform, and is used to continuously acquire images of the inkjet printed cloth after lamination and output image data;

[0013] The memory has a data input terminal connected to the signal output terminal of the image acquisition module and is used to receive and store the image data.

[0014] By adopting the above technical scheme, in the actual lamination process, the cloth delivery roller and the cloth collection roller drive the printing cloth to pass through the lamination platform at a uniform speed. In the process of the printing cloth passing through the lamination platform, the film delivery roller rotates to drive the film material to be sent out at a uniform speed. The traction of the traction roller can make the material have a certain tension. In the process of the film material passing through the electromagnetic heating roller, the film material is softened by heat. Then, when the film material passes under the film pressing plate, the sponge deforms and exerts pressure on the film material, so that the film material can be attached to the surface of the printing cloth to ensure the lamination quality. At the same time, the film material is softened by heating, which can further improve the adhesion stability of the film material on the surface of the printing cloth. And because the sponge itself is soft, it can reduce the damage of the film material during the pressing process. Through the setting of the thickness detection module, the control module and the drive module, the height of the film pressing plate can be adjusted according to the thickness of the printing cloth, so that the pressure exerted by the sponge on the film material is moderate, eliminating the operator from the process of manually adjusting the lamination pressure, which can effectively improve the convenience of the operator to use the lamination device. At the same time, through the combination and use of the image acquisition module and the memory, the surface image data of the printed cloth after lamination can be continuously acquired and stored, and the operator can judge the lamination effect and quality through the stored image data.

[0015] Preferably, the thickness detection module includes:

[0016] A first distance measuring sensor is fixedly mounted on the frame, with a sensing end disposed toward the upper surface of the inkjet printing cloth on the laminating platform, and is used to detect the distance to the upper surface of the inkjet printing cloth and output a first sensing distance signal;

[0017] The first single chip microcomputer is connected to the signal output terminal of the first distance measuring sensor, and is used to receive the first sensing distance signal, calculate the thickness of the printing cloth, and output the cloth thickness signal.

[0018] By adopting the above technical solution, since the distance from the first distance measuring sensor to the surface of the coating platform is a known value, the technical effect of automatically detecting the thickness of the inkjet printing cloth can be achieved by collecting the first sensing distance between the upper surface of the inkjet paper and the first distance measuring sensor itself and calculating it through the first single-chip microcomputer.

[0019] Preferably, the control module includes a second single-chip microcomputer, a signal input terminal of the second single-chip microcomputer is signal-connected to a signal output terminal of the first single-chip microcomputer, and the second single-chip microcomputer receives the fabric thickness signal and controls the driving module to move toward or away from the coating platform.

[0020] By adopting the above technical solution, the second single chip microcomputer can automatically control the lifting and lowering of the film pressing plate according to the thickness of the inkjet printing cloth.

[0021] Preferably, the driving module comprises a hydraulic cylinder, a cylinder body of the hydraulic cylinder is fixedly connected to the frame, and a driving shaft of the hydraulic cylinder is fixedly connected to the top of the membrane pressure plate.

[0022] By adopting the above technical solution, the hydraulic cylinder extends or retracts the drive shaft, which can adjust the height of the film pressing plate and then adjust the position of the sponge, thereby achieving the technical effect of adjusting the laminating pressure according to the thickness of the inkjet printing cloth.

[0023] Preferably, the image acquisition module includes:

[0024] A length detection unit, used to detect the length of the film material flowing through the film laminating platform and output a film material length signal;

[0025] A third single chip microcomputer, whose signal input terminal is signal-connected to the signal output terminal of the length detection unit, is used to receive the film material length signal and output a trigger signal when the film material length is a set value or an integral multiple of the set value;

[0026] The CCD camera is fixedly mounted on the frame and is located between the film pressing plate and the cloth collecting roller. The signal input end is connected to the signal output end of the third single chip microcomputer and is used to receive the trigger signal, collect the inkjet printed cloth image, and output image data.

[0027] By adopting the above technical scheme, the length detection unit, the third single-chip microcomputer and the CCD camera are matched and used with each other to realize automatic detection of the delivery length of the film material. The third single-chip microcomputer can control the CCD camera to collect the surface image data of the inkjet cloth after coating in sections and continuously according to the area size of the image captured by the CCD camera, thereby realizing the technical effect of automatically and continuously collecting the surface image data of the inkjet cloth after coating.

[0028] Preferably, a sensing bump is fixedly connected to the end side wall of the traction roller, and the length detection unit comprises:

[0029] A second distance measuring sensor is fixedly mounted on the side wall of the frame, with a sensing end disposed toward the end side wall of the traction roller, and is used to detect the distance between the sensor and the roller surface of the traction roller and output a second sensing distance signal;

[0030] A comparator chip, whose signal input terminal is signal-connected to the signal output terminal of the second distance measuring sensor, for receiving and comparing the second sensing distance signal, and outputting a high level signal when the second sensing distance is less than a set value;

[0031] The fourth single chip microcomputer has a signal input terminal connected to the signal input terminal of the comparator chip, and is used to receive the high level signal, calculate the film material length, and output the film material length signal.

[0032] By adopting the above technical scheme, since the length of the film material corresponds to the length of the inkjet cloth one-to-one, and the length of the film material sent out corresponding to one rotation of the traction roller is a fixed length value, when the traction roller rotates one circle and the sensing protrusion faces the second distance measuring sensor once, the second sensing distance value measured by the second distance measuring sensor is less than the set value, and the comparator chip outputs a high-level signal. The fourth single-chip microcomputer can calculate the number of occurrences of the high-level signal, and automatically calculate the sending length of the film material and the inkjet cloth according to the number of occurrences of the high-level signal, and trigger the CCD camera to collect and store the surface image data of the inkjet cloth after coating when the sending length of the film material and the inkjet cloth is the set length value or an integer multiple of the set length value, so as to achieve the technical effect of automatically detecting the sending length of the film material and the inkjet cloth and automatically triggering the CCD camera to perform continuous image acquisition operations.

[0033] Preferably, the bottom corners of the sponge close to the electromagnetic heating roller are rounded.

[0034] By adopting the above technical solution, the rounded corners of the bottom of the sponge can form a transition, which can effectively reduce the damage of the film material after being softened by heat.

[0035] In summary, the present invention provides a coating device for advertising inkjet printed cloth, which has at least one of the following beneficial technical effects:

[0036] 1. Through the coordination and use of the first distance measuring sensor, the first single-chip microcomputer, the second single-chip microcomputer and the hydraulic cylinder, the technical effect of automatically detecting the thickness of the printing cloth and automatically adjusting the pressure exerted by the sponge at the bottom of the film pressing plate on the film material according to the thickness of the printing cloth can be achieved, eliminating the need for operators to adjust the laminating device by themselves, and effectively improving the convenience of operators using the laminating device to perform laminating processing on the printing cloth;

[0037] 2. Through the setting of electromagnetic heating roller, the film material can be heated and softened before lamination, which can effectively improve the adhesion effect of the film material on the surface of the printing cloth;

[0038] 3. Through the coordination and use of the second distance measuring sensor, the third single-chip microcomputer, the fourth single-chip microcomputer, the CCD camera and the memory, it is possible to automatically detect the feeding length of the film material and the inkjet printing cloth, and when the feeding length of the film material and the inkjet printing cloth is a set length value or an integer multiple of the set length value, automatically control the CCD camera to collect and store the image data of the inkjet printing cloth after coating segment by segment and continuously, so that the operator can judge the coating effect and coating quality through the stored image data. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of an embodiment of the present application for illustrating the overall structure of a coating device.

[0040] Figure 2 It is a schematic diagram of an embodiment of the present application for illustrating the installation position of the second ranging sensor.

[0041] Figure 3 It is a schematic diagram used to demonstrate the signal transmission between the thickness detection module and the driving module according to the embodiment of the present application.

[0042] Figure 4 It is a schematic diagram of an embodiment of the present application for demonstrating the image acquisition module and memory signal transmission.

[0043] Explanation of the reference numerals: 1. Frame; 11. Laminating platform; 12. Cloth discharging roller; 13. Cloth collecting roller; 2. Film discharging roller; 3. Traction roller; 31. Induction bump; 4. Electromagnetic heating roller; 5. Film pressing plate; 51. Sponge; 6. First distance measuring sensor; 7. Hydraulic cylinder; 8. Image acquisition module; 81. CCD camera; 82. Second distance measuring sensor. DETAILED DESCRIPTION

[0044] The following is combined with Figure 1-4 This application is described in further detail.

[0045] Example

[0046] The present application embodiment discloses a coating device for advertising inkjet printing cloth. Figure 1-Figure 4The invention mainly comprises a frame 1, on which a film discharging roller 2, a traction roller 3 and an electromagnetic heating roller 4 are rotatably mounted, and the traction roller 3 is located between the film discharging roller 2 and the electromagnetic heating roller 4. A film pressing plate 5 is provided on the frame 1 above the film laminating platform 11, and a sponge 51 is detachably mounted on the bottom of the film pressing plate 5, and the film pressing plate 5 is located between the electromagnetic heating roller 4 and the cloth collecting roller 13.

[0047] The bottom corners of the sponge 51 near the electromagnetic heating roller 4 are rounded. The rounded bottom corners of the sponge 51 can form a transition, which can effectively reduce the damage to the film material after being softened by heat.

[0048] And: a thickness detection module, which is arranged on the laminating platform 11, and is used to detect the thickness of the inkjet printed cloth and output a cloth thickness signal; a control module, whose signal input end is signal-connected with the signal output end of the thickness detection module, and is used to receive the cloth thickness signal and output a control signal; a driving module, which is fixedly mounted on the frame 1, whose driving end is fixedly connected with the top of the film pressing plate 5, and is signal-connected with the signal output end of the control module, and is used to receive the control signal and drive the film pressing plate 5 to move toward or away from the laminating platform 11; an image acquisition module 8, which is fixedly mounted on the frame 1, and is erected above the laminating platform 11, and is used to continuously acquire the image of the inkjet printed cloth after lamination and output image data; a memory, whose data input end is signal-connected with the signal output end of the image acquisition module 8, and is used to receive and store image data.

[0049] During the actual lamination process, the cloth delivery roller 12 and the cloth collection roller 13 drive the inkjet printed cloth to pass through the lamination platform 11 at a uniform speed. During the process of the inkjet printed cloth passing through the lamination platform 11, the film delivery roller 2 rotates to drive the film material to be sent out at a uniform speed. The material can have a certain tension through traction by the traction roller 3. During the process of the film material passing through the electromagnetic heating roller 4, the film material is softened by heat. Subsequently, when the film material passes under the film pressing plate 5, the sponge 51 is deformed and exerts pressure on the film material, so that the film material can be adhered to the surface of the inkjet printed cloth to ensure the lamination quality. At the same time, the film material is softened by heating, which can further improve the adhesion stability of the film material on the surface of the inkjet printed cloth. Moreover, since the sponge 51 itself is soft in texture, the damage of the film material during the lamination process can be reduced.

[0050] Through the setting of the thickness detection module, the control module and the driving module, the height of the film pressing plate 5 can be adjusted according to the thickness of the inkjet printing cloth, so that the pressure exerted by the sponge 51 on the film material is moderate, eliminating the operator's need to manually adjust the laminating pressure, and effectively improving the operator's convenience in using the laminating device.

[0051] At the same time, by using the image acquisition module 8 and the memory together, the surface image data of the printed cloth after lamination can be continuously acquired and stored, and the operator can judge the lamination effect and quality through the stored image data.

[0052] It should be noted that, in the embodiment of the present application, both ends of the electromagnetic heating roller 4 are rotatably mounted on the frame 1 via a rotary joint, and it is driven by a servo motor to rotate at a constant speed to heat and soften the film material passing through its roller surface at a constant speed.

[0053] Reference Figure 1 and Figure 3 The thickness detection module includes: a first distance measuring sensor 6, which is fixedly mounted on the frame 1, with the sensing end facing the upper surface of the inkjet printed cloth on the laminating platform 11, and is used to detect the distance between the upper surface of the inkjet printed cloth and output a first sensing distance signal; a first single-chip microcomputer, which is signal-connected to the signal output end of the first distance measuring sensor 6, and is used to receive the first sensing distance signal and calculate the thickness of the inkjet printed cloth, and output a cloth thickness signal.

[0054] Since the distance from the first distance measuring sensor 6 to the surface of the coating platform 11 is a known value, the technical effect of automatically detecting the thickness of the printing cloth can be achieved by collecting the first sensing distance between the upper surface of the printing paper and the first distance measuring sensor 6 itself and calculating it through the first single chip microcomputer.

[0055] In the embodiment of the present application, the control module adopts a second single chip microcomputer, the signal input end of the second single chip microcomputer is connected to the signal output end of the first single chip microcomputer, the second single chip microcomputer receives the fabric thickness signal and controls the driving module to move toward or away from the coating platform 11.

[0056] It should be noted that in the embodiment of the present application, the driving module adopts a hydraulic cylinder 7 , the cylinder body of the hydraulic cylinder 7 is fixedly connected to the frame 1 , and the driving shaft of the hydraulic cylinder 7 is fixedly connected to the top of the membrane pressure plate 5 .

[0057] The hydraulic cylinder 7 extends or retracts the driving shaft, which can adjust the height of the film pressing plate 5 and then adjust the position of the sponge 51, and can achieve the technical effect of adjusting the laminating pressure according to the thickness of the inkjet printing cloth.

[0058] Reference Figure 2 and Figure 4 The image acquisition module 8 includes: a length detection unit, which is used to detect the length of the film material flowing through the coating platform 11 and output a film material length signal; a third single-chip microcomputer, whose signal input end is signal-connected to the signal output end of the length detection unit, and is used to receive the film material length signal and output a trigger signal when the film material length is a set value or an integer multiple of the set value; a CCD camera 81, which is fixedly installed on the frame 1, located between the film pressing plate 5 and the cloth collecting roller 13, and whose signal input end is signal-connected to the signal output end of the third single-chip microcomputer, and is used to receive the trigger signal and collect the image of the inkjet printed cloth and output the image data.

[0059] The length detection unit, the third single-chip microcomputer and the CCD camera 81 are used in conjunction with each other to realize automatic detection of the delivery length of the film material. The third single-chip microcomputer can control the CCD camera 81 to collect the surface image data of the inkjet cloth after coating in sections and continuously according to the area size of the image captured by the CCD camera 81, thereby realizing the technical effect of automatically and continuously collecting the surface image data of the inkjet cloth after coating.

[0060] Reference Figure 2 and Figure 4 , a sensing protrusion 31 is embedded and fixedly connected on the end side wall of the traction roller 3, and the length detection unit includes: a second distance measuring sensor 82, which is fixedly installed on the side wall of the frame 1, and the sensing end is arranged toward the end side wall of the traction roller 3, for detecting the distance between the roller surface of the traction roller 3 and outputting a second sensing distance signal; a comparator chip, whose signal input end is signal-connected with the signal output end of the second distance measuring sensor 82, for receiving and comparing the second sensing distance signal, and outputting a high-level signal when the second sensing distance is less than a set value; a fourth single-chip microcomputer, whose signal input end is signal-connected with the signal input end of the comparator chip, for receiving a high-level signal and calculating the film material length, and outputting a film material length signal.

[0061] Since the length of the film material corresponds to the length of the inkjet cloth, and the length of the film material sent out corresponding to one rotation of the traction roller 3 is a fixed length value, when the traction roller 3 rotates one circle and the sensing protrusion 31 faces the second distance measuring sensor 82 once, the second sensing distance value measured by the second distance measuring sensor 82 is less than the set value, and the comparator chip outputs a high-level signal. The fourth single-chip microcomputer can calculate the number of occurrences of the high-level signal and automatically calculate the sending length of the film material and the inkjet cloth according to the number of occurrences of the high-level signal. The third single-chip microcomputer can trigger the CCD camera 81 to collect the surface image data of the inkjet cloth after coating when the sending length of the film material and the inkjet cloth is the set length value or an integer multiple of the set length value, and store it in the memory, so as to achieve the technical effect of automatically detecting the sending length of the film material and the inkjet cloth and automatically triggering the CCD camera 81 to perform continuous image acquisition operations.

[0062] It should be noted that in the embodiment of the present application, the first ranging sensor and the second ranging sensor are both infrared ranging sensors. In some other embodiments, they can be replaced by ultrasonic ranging sensors, laser ranging sensors, etc. according to actual needs, which are not limited or elaborated here.

[0063] The implementation principle of the coating device for advertising inkjet cloth in the embodiment of the present application is as follows: through the mutual coordination and use of the first distance measuring sensor 6, the first single-chip microcomputer, the second single-chip microcomputer and the hydraulic cylinder 7, the technical effect of automatically detecting the thickness of the inkjet cloth and automatically adjusting the pressure applied by the sponge 51 at the bottom of the film pressing plate 5 to the film material according to the thickness of the inkjet cloth can be achieved, which saves the operator from adjusting the coating device by himself, and can effectively improve the convenience of the operator to use the coating device to coat the inkjet cloth; through the setting of the electromagnetic heating roller 4, the film material can be heated before coating. The heating and softening treatment can effectively improve the adhesion effect of the film material on the surface of the inkjet printing cloth; through the coordination and use of the second distance measuring sensor 82, the third single-chip microcomputer, the fourth single-chip microcomputer, the CCD camera 81 and the memory, it is possible to automatically detect the feeding length of the film material and the inkjet printing cloth, and automatically control the CCD camera 81 to collect the image data of the inkjet printing cloth after coating segment by segment and continuously when the feeding length of the film material and the inkjet printing cloth is a set length value or an integer multiple of the set length value, and store it, so that the operator can judge the coating effect and coating quality through the stored image data.

[0064] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A laminating device for advertising inkjet printed cloth, It is characterized in that The invention comprises a frame (1), on which a film-discharging roller (2), a traction roller (3) and an electromagnetic heating roller (4) are rotatably mounted, and the traction roller (3) is located between the film-discharging roller (2) and the electromagnetic heating roller (4); A film pressing plate (5) is provided on the frame (1) above the film coating platform (11) in a lifting manner, a sponge (51) is detachably mounted on the bottom of the film pressing plate (5), and the film pressing plate (5) is located between the electromagnetic heating roller (4) and the cloth collecting roller (13); as well as: A thickness detection module, arranged on the laminating platform (11), for detecting the thickness of the printing cloth and outputting a cloth thickness signal; A control module, whose signal input end is signal-connected to the signal output end of the thickness detection module, for receiving the cloth thickness signal and outputting a control signal; A drive module, fixedly mounted on the frame (1), with a drive end fixedly connected to the top of the film pressing plate (5), and connected to the signal output end of the control module, for receiving the control signal and driving the film pressing plate (5) to move in a direction close to or away from the film laminating platform (11); An image acquisition module (8) is fixedly mounted on the frame (1) and is arranged above the laminating platform (11), and is used to continuously acquire images of the printed cloth after lamination and output image data; A memory, wherein a data input end is signal-connected to a signal output end of the image acquisition module (8), and is used for receiving and storing the image data.

2. A coating device for advertising inkjet printing cloth according to claim 1, It is characterized in that The thickness detection module comprises: A first distance measuring sensor (6) is fixedly mounted on the frame (1), with a sensing end disposed toward the upper surface of the inkjet printing cloth on the laminating platform (11), and is used to detect the distance to the upper surface of the inkjet printing cloth and output a first sensing distance signal; The first single chip microcomputer is signal-connected to the signal output terminal of the first distance measuring sensor (6), and is used to receive the first sensing distance signal, calculate the thickness of the printing cloth, and output the cloth thickness signal.

3. A coating device for advertising inkjet printing cloth according to claim 2, It is characterized in that The control module comprises a second single chip microcomputer, the signal input end of the second single chip microcomputer is signal-connected to the signal output end of the first single chip microcomputer, the second single chip microcomputer receives the cloth thickness signal and controls the driving module to move in a direction close to or away from the coating platform (11).

4. A coating device for advertising inkjet printing cloth according to claim 3, It is characterized in that The driving module comprises a hydraulic cylinder (7), a cylinder body of the hydraulic cylinder (7) is fixedly connected to the frame (1), and a driving shaft of the hydraulic cylinder (7) is fixedly connected to the top of the membrane pressure plate (5).

5. The laminating device for advertising inkjet printed cloth according to claim 1, It is characterized in that The image acquisition module (8) comprises: A length detection unit, used for detecting the length of the film material flowing through the film coating platform (11) and outputting a film material length signal; A third single chip microcomputer, whose signal input terminal is signal-connected to the signal output terminal of the length detection unit, is used to receive the film material length signal and output a trigger signal when the film material length is a set value or an integral multiple of the set value; A CCD camera (81) is fixedly mounted on the frame (1), located between the film pressing plate (5) and the cloth collecting roller (13), and has a signal input terminal connected to a signal output terminal of the third single chip microcomputer, for receiving the trigger signal, collecting an image of the printed cloth, and outputting image data.

6. A film laminating device for advertising inkjet printed cloth according to claim 5, It is characterized in that A sensing convex block (31) is fixedly connected to the end side wall of the traction roller (3), and the length detection unit comprises: A second distance measuring sensor (82) is fixedly mounted on a side wall of the frame (1), with a sensing end disposed toward the end side wall of the traction roller (3), and is used to detect the distance to the roller surface of the traction roller (3) and output a second sensing distance signal; A comparator chip, whose signal input end is signal-connected to the signal output end of the second distance measuring sensor (82), and is used to receive and compare the second sensing distance signal, and output a high-level signal when the second sensing distance is less than a set value; The fourth single chip microcomputer has a signal input terminal connected to the signal input terminal of the comparator chip, and is used to receive the high level signal, calculate the film material length, and output the film material length signal.

7. The laminating device for advertising inkjet printed cloth according to claim 1, It is characterized in that The bottom corner of the sponge (51) close to the electromagnetic heating roller (4) is arranged in a rounded shape.

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