Device for detecting flaws of aluminized cast film

Abstract

The utility model discloses an aluminum-plated cast film defect detection device, and belongs to the technical field of cast film production. Comprising a rack, a first guide roller and a second guide roller, a film belt is arranged on the first guide roller and the second guide roller, a detection mechanism is arranged on the rack and comprises a camera obscura, a light-emitting mechanism is arranged in the camera obscura and located above the film belt, and a receiver matched with the light-emitting mechanism is arranged below the film belt. According to the utility model, a manual naked eye visual inspection method can be effectively replaced, and the detection efficiency and accuracy are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cast film production, in particular to a device for detecting defects in aluminum-plated cast films. Background Art

[0002] Cast film is a non-stretched, non-directional flat extruded film produced by melt casting and quenching. Compared to blown film, it features fast production speeds, high yields, and excellent film transparency, gloss, and thickness uniformity. It also facilitates subsequent processes such as printing and lamination, making it a key composite substrate for packaging. For example, aluminized cast film is used in the inner packaging of foods such as instant noodles and puffed foods, and the market is very optimistic about its potential.

[0003] Throughout the entire aluminized cast film production process, holes can form on the film's surface during processes prior to slitting. Once these defects develop, they can affect subsequent production and use. Therefore, during the slitting process, the film's surface must be inspected for defects while the gantry slitting machine is slitting the film. Defect detection for aluminized cast film typically utilizes optical inspection. Specifically, a fluorescent lamp mounted on a gantry beam shines light through the film. The operator observes the light, utilizing the difference in refraction at the holes compared to normal light, to manually detect defects. However, relying solely on manual inspection for defect detection in aluminized cast film has several drawbacks: prolonged inspection can cause visual fatigue, and due to the high speed of the aluminized cast film moving along the guide rollers, defects can be missed or missed during visual inspection. These factors affect the accuracy of defect detection. Therefore, improving the efficiency and accuracy of aluminized cast film defect detection methods is crucial. In view of the above problems, it is necessary to improve the existing equipment. Summary of the Invention

[0004] The purpose of this utility model is to solve the problem that in the prior art, aluminum-coated cast film relies solely on manual inspection for quality control, which leads to human eye fatigue and is prone to defects being not discovered in time or missed. A defect detection device for aluminum-coated cast film is proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A device for detecting defects in aluminum-coated cast film comprises a frame, a first guide roller and a second guide roller, wherein film strips are provided on the first guide roller and the second guide roller, and a detection mechanism is provided on the frame, wherein the detection mechanism comprises a dark box, wherein a light-emitting mechanism is provided in the dark box, wherein the light-emitting mechanism is located above the film strip, and a receiver cooperating with the light-emitting mechanism is provided below the film strip.

[0007] In some embodiments, the light-emitting mechanism includes a light box and an LED light strip disposed in the light box, and a reflector is installed above the LED light strip.

[0008] In some embodiments, the reflector is a curved mirror, and the lamp beads of the LED light strip are arranged toward the center of the reflector.

[0009] In some embodiments, the dark box is symmetrically provided with notches, and the film strip passes through the notches.

[0010] In some embodiments, a lampshade is provided at the bottom of the light box, and a lens is installed on the lampshade.

[0011] In some embodiments, the lens is a convex lens.

[0012] In some embodiments, a bracket is provided on the top of the light box.

[0013] Compared with the prior art, the present invention provides an aluminum-coated cast film defect detection device, which has the following beneficial effects.

[0014] During the online conveying of the film belt in the utility model, the light emitted by the LED light belt shines on the reflector, and the reflector adjusts the light emitted by the LED light belt into parallel light and shines it onto the lens. The lens focuses the parallel light and aggregates it into a line of light. When the film belt moves over the top of the receiver, the line of light passes through the film belt and is refracted, forming a light strip of fixed width on the receiver; if there is a hole defect in the film belt, the refraction angle of part of the light passing through the hole changes, then the width of the corresponding light strip formed on the receiver changes, and the receiver converts the optical signal corresponding to this part of the change into an electrical signal and feeds it back to the control system on the production line, and the control system issues corresponding instructions for display, alarm, recording or shutdown, which can effectively replace the manual visual inspection method and improve the detection efficiency and accuracy. It can effectively replace the manual visual inspection method and improve the detection efficiency and accuracy.

[0015] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. The utility model can effectively replace the manual visual inspection method and improve the detection efficiency and accuracy.

[0016] Other advantages, objectives and features of the present invention will be described in the following description to some extent; and will be apparent to those skilled in the art based on an examination of the following; or may be taught from the practice of the present invention to some extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the present utility model.

[0018] Figure 2 It is a top view of the present utility model.

[0019] Figure 3 This utility model Figure 2 Enlarged schematic diagram of AA in the middle.

[0020] Figure 4 This utility model Figure 3 Enlarged schematic diagram of point B in the middle.

[0021] Figure 5 It is a schematic diagram of the connection between the light box and the lampshade in the utility model.

[0022] Figure 6 It is a principle diagram of the present utility model.

[0023] The reference numerals in the accompanying drawings are:

[0024] 1. Frame; 2. Guide roller 1; 3. Guide roller 2; 4. Film strip; 5. Dark box; 6. Receiver; 7. Light box; 8. LED light strip; 9. Reflector; 10. Notch; 11. Lampshade; 12. Lens; 13. Bracket. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Reference Figure 1-5 A device for detecting defects in aluminum-coated cast film comprises a frame 1, a guide roller 2 and a guide roller 3, a film belt 4 is provided on the guide roller 2 and the guide roller 3, a detection mechanism is provided on the frame 1, the detection mechanism comprises a dark box 5, a light-emitting mechanism is provided in the dark box 5, the light-emitting mechanism is located above the film belt 4, and a receiver 6 matched with the light-emitting mechanism is provided below the film belt 4.

[0027] Specifically, the light-emitting mechanism includes a light box 7 and an LED light strip 8 arranged in the light box 7 , and a reflector 9 is installed above the LED light strip 8 .

[0028] In this embodiment, the reflector 9 is a curved mirror, and the lamp beads of the LED light strip 8 are arranged toward the center of the reflector 9 .

[0029] Please refer again Figure 3 The dark box 5 is symmetrically provided with notches 10 , through which the film strip 4 passes.

[0030] Please refer again Figure 5 A lampshade 11 is provided at the bottom of the light box 7, and a lens 12 is mounted on the lampshade 11. In addition, a bracket 13 is provided at the top of the light box 7 for easy installation.

[0031] In this embodiment, the lens 12 is a convex lens.

[0032] The working principle of this utility model is:

[0033] In actual application, on the frame 1 of the gantry slitting machine on the aluminum cast film production line, guide rollers 1 and 2 are set. The unwinding device at the front end of the gantry slitting machine unwinds the film strip 4, and then, driven by the rewinding device at the end of the gantry slitting machine, the film strip 4 passes through the guide rollers 1 and 2 and 3 and is transported forward. During the online transportation of the film strip 4, the light emitted by the LED light strip 8 shines on the reflector 9. Please refer to Figure 6 The reflector 9 adjusts the light emitted by the LED light strip 8 into parallel light and irradiates it to the lens 12. The lens 12 focuses the parallel light and aggregates it into a line of light. When the film strip 4 moves over the receiver 6, the line of light passes through the film strip 4 and is refracted, forming a light strip of fixed width on the receiver 6. If there is a hole defect in the film strip 4, the refraction angle of the part of the light passing through the hole changes, then the width of the corresponding light strip formed on the receiver 6 changes. The receiver 6 converts the optical signal corresponding to this part of the change into an electrical signal and feeds it back to the control system on the production line. The control system issues corresponding instructions for display, alarm, recording or shutdown, which can effectively replace the manual visual inspection method and improve the detection efficiency and accuracy.

[0034] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0036] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A device for detecting defects in aluminum-coated cast film, comprising a frame (1), a first guide roller (2) and a second guide roller (3), wherein a film belt (4) is provided on the first guide roller (2) and the second guide roller (3), and characterized in that: The frame (1) is provided with a detection mechanism, which includes a dark box (5). A light-emitting mechanism is provided in the dark box (5). The light-emitting mechanism is located above the film strip (4). A receiver (6) that cooperates with the light-emitting mechanism is provided below the film strip (4).

2. The aluminum cast film defect detection device according to claim 1, characterized in that: The light-emitting mechanism comprises a light box (7) and an LED light strip (8) arranged in the light box (7), and a reflector (9) is installed above the LED light strip (8).

3. The aluminum cast film defect detection device according to claim 2, characterized in that: The reflector (9) is a curved mirror, and the lamp beads of the LED light strip (8) are arranged toward the center of the reflector (9).

4. The aluminum cast film defect detection device according to claim 1, characterized in that: Notches (10) are symmetrically provided on the dark box (5), and the film strip (4) passes through the notches (10).

5. The aluminum cast film defect detection device according to claim 1, characterized in that: A lampshade (11) is provided at the bottom of the light box (7), and a lens (12) is mounted on the lampshade (11).

6. The aluminum cast film defect detection device according to claim 5, characterized in that: The lens (12) is a convex lens.

7. The aluminum cast film defect detection device according to claim 2, characterized in that: A bracket (13) is provided on the top of the light box (7).

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